WO2014084628A1 - Apparatus for measuring current of battery and method therefor - Google Patents

Apparatus for measuring current of battery and method therefor Download PDF

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Publication number
WO2014084628A1
WO2014084628A1 PCT/KR2013/010905 KR2013010905W WO2014084628A1 WO 2014084628 A1 WO2014084628 A1 WO 2014084628A1 KR 2013010905 W KR2013010905 W KR 2013010905W WO 2014084628 A1 WO2014084628 A1 WO 2014084628A1
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Prior art keywords
current
switch
main
controller
current measuring
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PCT/KR2013/010905
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French (fr)
Korean (ko)
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박세호
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에스케이이노베이션 주식회사
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Publication of WO2014084628A1 publication Critical patent/WO2014084628A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC

Definitions

  • the present invention relates to a battery current measuring device and a method thereof, and in particular, configured to measure current through a resistor installed in a relay stage so as not to receive external noise interference, and to detect and correct an abnormality of an internal current measuring hall sensor. It relates to a battery current measuring device and a method thereof.
  • a typical electric vehicle generates high power by connecting a battery produced in a module unit in which a plurality of cells are connected in series / parallel.
  • the number of modules used varies depending on the amount of power required, but generally, a voltage between 250V and 350V is used.
  • Electric vehicles generate about 200-500A of current at the above-mentioned voltages to generate power for moving the vehicle during the discharge phase, and vice versa. Use a current of about 200A.
  • a shunt resistor current measurement method or ii) a current measurement method using a hall sensor is used in a general electric vehicle to measure such a high current.
  • the current measurement method using the shunt resistor has a problem that the sensor is the simplest and most accurate current sensing method or a problem related to heat generation, and it is difficult to apply to a vehicle because it is expensive and difficult to implement.
  • the current measurement method using the Hall sensor is similar to the shunt resistance current measurement method, but the circuit and measurement method to be added in addition to the sensor has the advantages of being simple to implement and easy to measure the current of the high current.
  • Current measurement method Due to the characteristics of the Hall element, it cannot be free from interference of external noise, which causes a problem of inferior accuracy.
  • Patent Document 1 Domestic Publication No. 2003-0072751
  • the present invention for solving the above problems is to provide a battery current measuring apparatus and method for measuring the current through a resistor installed in the relay stage so as not to receive external noise interference.
  • the present invention is to provide a battery current measuring device and method for detecting and correcting the abnormality of the internal Hall sensor for measuring current.
  • the main first switch installed in the high potential line between the battery pack and the load;
  • a precharge switch connected in parallel with the main first switch on a high potential line between a battery pack and a load;
  • a main second switch installed at a low potential line between the battery pack and the load;
  • a resistance for measuring current installed between the precharge switch and the load;
  • a current measuring unit measuring a voltage across both ends of the current measuring resistor and calculating a current value;
  • a controller which controls the main first switch, the main second switch, and the precharge switch, and receives a current value calculated by the current measuring unit.
  • the apparatus of the present invention further includes a precharge resistor installed in series with the current measuring resistor between the precharge switch and the load.
  • the control unit of the apparatus of the present invention may turn on the precharge switch after turning on the main second switch, turn on the main first switch after a predetermined time, turn off the precharge switch, and the current measuring unit
  • the current is calculated by measuring the voltage of the current measuring resistor at the time when the precharge switch is turned on.
  • the current measuring unit of the device of the present invention a voltage sensor for sensing a voltage across the current measuring resistor; An A / D converter for converting the voltage signal sensed by the voltage sensor into a digital signal; A communicator in communication with the control unit; And a controller for calculating a current value from the digitized voltage signal output from the A / D converter and transmitting the current value to the controller through the communicator.
  • the apparatus may further include a current converter installed between the battery pack, the main first switch, and the precharge switch to detect a current flowing in the high potential line and transmit the current to the controller.
  • controller of the apparatus of the present invention determines whether the current converter is abnormal by comparing the current value measured by the current converter with the current value measured by the current measurer.
  • the current converter of the apparatus of the present invention consists of an Open Loop Type Hall Effect Current Sensor.
  • the current conversion portion of the device of the present invention consists of a closed loop type Hall Effect Current Sensor.
  • the method of the present invention comprises the steps of (A) the control unit turns on the pre-charge switch after the main second switch on; (B) a current measuring unit measuring the voltage of the current measurement resistance at the time when the pre-charge switch is turned on, calculating the current and transmitting the current to the controller; And (C) the control unit turning on the main first switch after a predetermined time and turning off the precharge switch.
  • the method of the present invention includes the steps of (D) detecting the current flowing in the high potential line current conversion unit installed between the battery pack and the main first switch and the precharge switch to the control unit; And (E) comparing the current value measured by the current converter with the current value measured by the current measurer to determine whether the current converter is abnormal.
  • step (B) of the method of the present invention includes the steps of (B-1) the voltage sensor of the current measuring unit to measure the voltage of the resistance for measuring the current at the pre-charge switch turn-on time; (B-2) converting the voltage signal sensed by the voltage sensor into a digital signal by an A / D converter of the current measuring unit; And (B-3) the controller of the current measuring unit calculates a current value from the digitized voltage signal output from the A / D converter and transmits the current value to the controller.
  • the present invention since it is configured to measure the current through a resistor installed in the relay stage, it is possible to accurately measure the current without receiving external noise interference.
  • FIG. 1 is a block diagram of a battery current measuring device according to an embodiment of the present invention.
  • FIG. 2 is a switch waveform diagram of FIG. 1.
  • FIG. 3 is a block diagram of a battery current measuring device according to another embodiment of the present invention.
  • FIGS. 1 and 3 are detailed configuration diagram of the current measuring unit of FIGS. 1 and 3.
  • FIG. 5 is a flowchart of a method for measuring a battery current according to an embodiment of the present invention.
  • FIG. 1 is a configuration diagram of a battery current measuring device according to an embodiment of the present invention.
  • a battery current measuring apparatus includes a precharge switch 120, a precharge resistor 130, and a current measurement positioned between the battery pack 110 and a load 190.
  • the resistor 140 includes a main first switch 150, a main second switch 160, a current measuring unit 170, and a controller 180.
  • the battery pack 110 includes a cell assembly in which a plurality of unit cells capable of repetitive charging and discharging are connected in series or in parallel.
  • the unit cell is a known secondary battery such as an electric double layer capacitor or a lithium ion battery including an ultracapacitor, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and the like.
  • the precharge switch 120 is installed on the bypass line of the high potential line, and is connected in series with the precharge resistor 130 and the current measuring resistor 140.
  • main first switch 150 is installed on the high potential line Pack + connecting the positive electrode of the battery pack 110 and the load 190.
  • the main second switch 160 is installed on a low potential line Pack- which connects the negative electrode of the battery pack 110 and the load 190.
  • the precharge switch 120, the main first switch 150, and the main second switch 160 are configured as relays.
  • the present invention is not limited by the type of switch connecting the battery pack 110 and the load 190.
  • the precharge resistor 130 and the current measuring resistor 140 are connected to each other in series, and are installed on the bypass line of the high potential line.
  • the pre-charge resistor 130 and the current measuring resistor 140 are located between the pre-charge switch 120 and the load 190 so that the pre-charge switch 120 is turned on from the battery pack 110.
  • the current supplied to the load 190 is limited so as not to flow excessively.
  • the current measuring resistor 140 not only prevents the current supplied from the battery pack 110 to the load 190 from excessively flowing, but also provides a voltage difference between both ends of the current measuring unit 170. Allow the current to be measured.
  • the pre-charge resistor 130 has a current measuring resistor 140, respectively, but only the current measuring resistor 140 may be performed to perform the functions of current limiting and current measuring.
  • the current measuring unit 170 measures the voltage across the current measuring resistor 140 to measure the current flowing through the current measuring resistor 140. .
  • the controller 180 includes a precharge switch 120, a main first switch 150, and a main disposed on the transmission line of the load 190 and the battery pack 110 supplying power to the load 190. Overall operation of the second switch 160 is controlled.
  • the load 190 is a voltage conversion device for converting the discharge voltage applied from the battery pack 110 to another voltage level.
  • This load 190 includes a DC link capacitor 192, a low voltage DC-DC converter 194, and a battery 196.
  • the present invention is not limited by the type of the load 190, the load 190 should be understood to include any device or system that receives the operating power from the battery pack 110, for example the load ( 190 may be a motor that receives power from the battery pack 110 and generates power.
  • the controller 180 connects the battery pack 110 and the load 190, the main second switch 160, the precharge switch 120, and the main first switch 150 are shown in FIG. 2.
  • the low switches are turned on, and when the main first switch 150 is turned on, the precharge switch 120 is turned off after a predetermined time.
  • the pre-charge switch 120 and the main second switch 160 are turned on so that a current flows through the pre-charge resistor 130 and the current measuring resistor 140, and thus the DC link capacitor of the load 190. Charge 192.
  • the current measuring unit 170 measures the voltage at both ends of the current measuring resistor 140 at the sensing time shown in FIG. 2 to flow through the current measuring resistor 140. Measure and transmit the measured current value to the controller 180.
  • the current measuring unit 170 may not measure the current.
  • FIG. 3 is a block diagram of a battery current measuring device according to another embodiment of the present invention.
  • the battery current measuring device additionally includes a current converting unit 200 in a high potential line between the battery pack 110 and the switch stage, thereby providing a high potential in front of the switch stage. Measure the current flowing through the line.
  • the current value measured by the current converter 200 is transmitted to the controller 180 and used for management of the battery pack 110.
  • the controller 180 may determine whether the current converter 200 is abnormal by comparing the current value measured by the current measuring unit 170 with the current value measured by the current converter 200. .
  • the controller 180 determines that the current converter 200 is out of order and informs the result to the user.
  • the current converter 200 may be an open loop type hall effect current sensor or a closed loop type hall effect current sensor, and the failure determination may be a failure of the hall sensor. Judgment is made.
  • FIGS. 1 and 3 are detailed configuration diagram of the current measuring unit of FIGS. 1 and 3.
  • the current measuring unit of FIGS. 1 and 3 includes a voltage sensor 210, an A / D converter 220, a controller 230, and a communicator 240.
  • the voltage sensor 210 senses and outputs a voltage applied to both ends ND1 and ND2 of the resistor 140 for current measurement.
  • the A / D converter 220 converts the voltage signal output from the voltage sensor 210 into a digital signal and outputs the digital signal.
  • the controller 230 receives a digitized voltage signal output from the A / D converter 220, calculates a current, and transmits the current to the controller 180 through the communicator 240.
  • the communicator 240 communicates with the controller 180 using at least one of CAN, Zigbee, WIFI, Bluetooth, infrared data communication, power line communication, USB, and SERIAL.
  • the precharge switch 120 is first turned on before the main first switch 150 is turned on.
  • the voltage sensor 210 senses and outputs a voltage across both ends ND1 and ND2 of the current measuring resistor 140.
  • the A / D converter 220 converts the voltage signal output from the voltage sensor 210 into a digital signal and outputs the digital signal.
  • the controller 230 digitizes the digital signal output from the A / D converter 220. The current is calculated by receiving the received voltage signal.
  • the measured current I is expressed by Equation 1 below.
  • the controller 230 transmits the calculated current value to the controller 180 through the communicator 240.
  • FIG. 5 is a flowchart of a battery current measuring method according to an embodiment of the present invention.
  • the battery current measuring method first turns on the main second switch when the controller connects the battery pack and the load (S110) and turns on the precharge switch after a predetermined time. (S120).
  • the precharge switch and the main second switch are turned on to charge the DC link capacitor of the load while current flows through the pre-charge resistor and the current measurement resistor.
  • the voltage sensor of the current measuring unit measures and outputs the voltage at both ends of the current measuring resistor (S130).
  • the A / D converter of the current measuring unit converts the voltage signal of the voltage sensor, which is an analog signal, into a digital signal and outputs the digital signal, thereby enabling digital signal processing (S140).
  • the controller of the current measuring unit calculates the current value by the above Equation 1 and transmits the current value to the controller through the communicator (S150).
  • the controller when the controller receives the current value calculated from the controller of the current measuring unit, the controller checks whether there is an abnormality, then turns on the main first switch (S160), and turns off the precharge switch (S170).
  • a current conversion unit consisting of a Hall sensor additionally measures the current flowing in the high potential line to the control unit, the control unit to the current value and the Hall sensor measured through the current measuring unit By comparing current values measured through the configured current converter, it is possible to determine whether an abnormality of the current converter-more specifically, that the hall sensor is abnormal.
  • the controller may determine that the current conversion unit (hall sensor) is out of order when the measured values are different from each other, and inform the user of the result.

Abstract

The present invention relates to an apparatus for measuring current of a battery and a method therefor, and particularly, to an apparatus for measuring current of a battery which is configured to measure the current through a resistor provided at a relay terminal so as to not receive external noise interference, and can detect and correct the abnormal state of an internal hall sensor for current measurement, and a method therefor. The apparatus for measuring the current of a battery, according the present invention, comprising: a first main switch provided on a high potential line between a battery pack and a load; a precharge switch connected in parallel to the first main switch on the high potential line between the battery pack and the load; a second main switch provided on a low potential line between the battery pack and the load; a current measuring resistor provided between the precharge switch and the load; a current measurement unit for calculating a current value by measuring a voltage between both ends of the current measuring resistor; and a control unit for controlling the first main switch, the second main switch, and the precharge switch, and receiving the current value calculated through the current measurement unit.

Description

배터리 전류 측정 장치 및 그 방법Battery current measuring device and method
[관련출원의 상호참조][Cross References of Related Applications]
본 출원은 2012년 11월 30일 출원된 한국특허 출원번호 제10-2012-0138267호를 우선권 주장하고 있으며, 상기 특허 문헌의 내용은 참조를 위해 본 발명에 모두 포함된다.This application claims priority to Korean Patent Application No. 10-2012-0138267, filed November 30, 2012, the contents of which are incorporated by reference in their entirety for reference.
본 발명은 배터리 전류 측정 장치 및 그 방법에 관한 것으로, 특히 릴레이 단에 설치된 저항을 통하여 전류를 측정하도록 구성하여 외부 노이즈 간섭을 받지 않도록 하고, 내부의 전류 측정용 홀 센서의 이상을 감지하여 보정할 수 있도록 한 배터리 전류 측정 장치 및 그 방법에 관한 것이다.The present invention relates to a battery current measuring device and a method thereof, and in particular, configured to measure current through a resistor installed in a relay stage so as not to receive external noise interference, and to detect and correct an abnormality of an internal current measuring hall sensor. It relates to a battery current measuring device and a method thereof.
통상적으로, 전기 차량은 에너지 저장장치로 배터리를 사용한다. 일반적인 전기 차량은 다수의 셀이 직렬 연결된 모듈 단위로 생산되는 배터리를 직/병렬로 연결시켜 높은 전력을 발생시키게 된다. Typically, electric vehicles use batteries as energy storage. A typical electric vehicle generates high power by connecting a battery produced in a module unit in which a plurality of cells are connected in series / parallel.
이때 사용되는 모듈의 개수는 필요 전력량에 따라 상이하나 일반적으로 250V에서 350V 사이의 전압을 이용하게 된다.In this case, the number of modules used varies depending on the amount of power required, but generally, a voltage between 250V and 350V is used.
이와 같은 사용 환경에서 이 같은 높은 전압을 내기 위해서는 수개에서 수십개 정도의 모듈을 직렬로 연결하여 사용하게 된다. In such an environment, several to dozens of modules are connected in series to produce such a high voltage.
전기 차량에서는 방전 단계인 차량을 움직이기 위한 동력을 발생시키기 위하여 위에서 언급된 정도의 전압에서 약 200-500A 정도의 전류를 발생시키게 되고 또한 이와 반대로 차량의 연료 주입과 같은 개념인 충전상태에서는 10-200A 정도의 전류를 이용한다.Electric vehicles generate about 200-500A of current at the above-mentioned voltages to generate power for moving the vehicle during the discharge phase, and vice versa. Use a current of about 200A.
이때 이 정도 높은 전류를 측정하기 위하여 일반적인 전기 차량에서는 i)션트 저항(Shunt Resistor) 전류 측정 방법이나, ii) 홀 센서( Hall sensor) 이용 전류 측정 방법 등이 사용된다.In this case, i) a shunt resistor current measurement method or ii) a current measurement method using a hall sensor is used in a general electric vehicle to measure such a high current.
여기서, 위의 션트 저항을 이용한 전류 측정 방법은 센서가 가장 간단하고 정확성이 높은 전류 센싱 방법이나 발열에 관련한 문제가 존재하고, 가격이 비싸고 구현이 어려운 측면이 있어 차량에 적용시키기 어렵다는 문제점이 있다. Here, the current measurement method using the shunt resistor has a problem that the sensor is the simplest and most accurate current sensing method or a problem related to heat generation, and it is difficult to apply to a vehicle because it is expensive and difficult to implement.
그리고, 홀 센서를 이용한 전류 측정 방법은 센서 이외에 부가되어야 하는 회로 및 측정방법은 션트 저항 전류 측정 방법이나 비슷하나, 구현이 간단하며, 고 전류의 전류 측정에 용이하다는 장점이 있으나, 홀 센서를 사용한 전류 측정 방법 홀 소자의 특성상 외부 노이즈의 간섭으로부터 자유로울 수 없어 정확도가 떨어지는 문제가 있다.In addition, the current measurement method using the Hall sensor is similar to the shunt resistance current measurement method, but the circuit and measurement method to be added in addition to the sensor has the advantages of being simple to implement and easy to measure the current of the high current. Current measurement method Due to the characteristics of the Hall element, it cannot be free from interference of external noise, which causes a problem of inferior accuracy.
그리고, 홀 센서의 이상 발생시에 측정치를 비교하고 이상 여부를 판단할 추가적인 측정치가 없다는 문제점이 있었다.In addition, there is a problem in that there is no additional measurement value to compare the measurement value and determine whether or not the abnormality of the Hall sensor.
[선행기술문헌][Preceding technical literature]
[특허문헌][Patent Documents]
(특허문헌 1) 국내공개번호 특2003-0072751(Patent Document 1) Domestic Publication No. 2003-0072751
상기와 같은 문제점을 해결하기 위한 본 발명은, 릴레이 단에 설치된 저항을 통하여 전류를 측정하도록 구성하여 외부 노이즈 간섭을 받지 않도록 한 배터리 전류 측정 장치 및 그 방법을 제공하는 데 있다.The present invention for solving the above problems is to provide a battery current measuring apparatus and method for measuring the current through a resistor installed in the relay stage so as not to receive external noise interference.
또한, 본 발명은 내부의 전류 측정용 홀 센서의 이상을 감지하여 보정할 수 있도록 한 배터리 전류 측정 장치 및 그 방법을 제공하는 데 있다.In addition, the present invention is to provide a battery current measuring device and method for detecting and correcting the abnormality of the internal Hall sensor for measuring current.
상기와 같은 목적을 달성하기 위한 본 발명의 장치는, 배터리 팩과 부하 사이의 고전위 선로에 설치된 메인 제1 스위치; 배터리 팩과 부하 사이의 고전위 선로에 상기 메인 제1 스위치와 병렬 연결된 프리 차지 스위치; 배터리 팩과 부하 사이의 저전위 선로에 설치된 메인 제2 스위치; 상기 프리 차지 스위치와 부하 사이에 설치된 전류 측정용 저항; 상기 전류 측정용 저항의 양단의 전압을 측정하여 전류값을 산출하는 전류 측정부; 및 상기 메인 제1 스위치와, 메인 제2 스위치 및 프리 차지 스위치를 제어하고, 상기 전류 측정부에서 산출한 전류값을 전송받는 제어부를 포함한다.The apparatus of the present invention for achieving the above object, the main first switch installed in the high potential line between the battery pack and the load; A precharge switch connected in parallel with the main first switch on a high potential line between a battery pack and a load; A main second switch installed at a low potential line between the battery pack and the load; A resistance for measuring current installed between the precharge switch and the load; A current measuring unit measuring a voltage across both ends of the current measuring resistor and calculating a current value; And a controller which controls the main first switch, the main second switch, and the precharge switch, and receives a current value calculated by the current measuring unit.
또한, 본 발명의 장치는, 상기 프리 차지 스위치와 부하 사이에 상기 전류 측정용 저항과 직렬로 설치된 프리 차지 저항을 더 포함한다.The apparatus of the present invention further includes a precharge resistor installed in series with the current measuring resistor between the precharge switch and the load.
또한, 본 발명의 장치의 상기 제어부는 상기 메인 제2 스위치를 턴온한 후에 프리 차지 스위치를 턴온하고, 일정 시간 후에 메인 제1 스위치를 턴온하며, 상기 프리 차지 스위치를 턴오프하며, 상기 전류 측정부는 상기 프리 차지 스위치가 턴온된 시간에 전류 측정용 저항의 전압을 측정하여 전류를 산출한다.The control unit of the apparatus of the present invention may turn on the precharge switch after turning on the main second switch, turn on the main first switch after a predetermined time, turn off the precharge switch, and the current measuring unit The current is calculated by measuring the voltage of the current measuring resistor at the time when the precharge switch is turned on.
또한, 본 발명의 장치의 상기 전류 측정부는 상기 전류 측정용 저항의 양단의 전압을 센싱하는 전압 센싱기; 상기 전압 센싱기에서 센싱한 전압 신호를 디지털 신호로 변환하는 A/D 변환기; 상기 제어부와 통신하는 통신기; 및 상기 A/D 변환기에서 출력되는 디지털화된 전압 신호에서 전류값을 산출하여 상기 통신기를 통하여 제어부로 전송하는 제어기를 포함한다.In addition, the current measuring unit of the device of the present invention a voltage sensor for sensing a voltage across the current measuring resistor; An A / D converter for converting the voltage signal sensed by the voltage sensor into a digital signal; A communicator in communication with the control unit; And a controller for calculating a current value from the digitized voltage signal output from the A / D converter and transmitting the current value to the controller through the communicator.
또한, 본 발명의 장치는, 상기 배터리 팩과 상기 메인 제1 스위치 및 프리 차지 스위치 사이에 설치되어 상기 고전위 선로에 흐르는 전류를 검출하여 상기 제어부로 전송하는 전류 변환부를 더 포함한다.The apparatus may further include a current converter installed between the battery pack, the main first switch, and the precharge switch to detect a current flowing in the high potential line and transmit the current to the controller.
또한, 본 발명의 장치의 상기 제어부는 상기 전류 변환부에서 측정한 전류값과 상기 전류 측정부에서 측정한 전류값을 비교하여 상기 전류 변환부의 이상 여부를 판단한다.In addition, the controller of the apparatus of the present invention determines whether the current converter is abnormal by comparing the current value measured by the current converter with the current value measured by the current measurer.
또한, 본 발명의 장치의 상기 전류 변환부는 오픈 루프 타입 홀 센서(Open Loop Type Hall Effect Current Sensor)로 이루어진다.In addition, the current converter of the apparatus of the present invention consists of an Open Loop Type Hall Effect Current Sensor.
또한, 본 발명의 장치의 상기 전류 변환부는 클로즈드 루프 타입 홀 센서(Closed Loop Type Hall Effect Current Sensor)로 이루어진다.In addition, the current conversion portion of the device of the present invention consists of a closed loop type Hall Effect Current Sensor.
한편, 본 발명의 방법은 (A) 제어부가 메인 제2 스위치를 턴온한 후에 프리 차지 스위치를 턴온하는 단계; (B) 전류 측정부가 상기 프리 차지 스위치가 턴온된 시간에 전류 측정용 저항의 전압을 측정하여 전류를 산출하여 제어부로 전송하는 단계; 및 (C) 상기 제어부가 일정 시간 후에 메인 제1 스위치를 턴온하며, 상기 프리 차지 스위치를 턴오프하는 단계를 포함한다.On the other hand, the method of the present invention comprises the steps of (A) the control unit turns on the pre-charge switch after the main second switch on; (B) a current measuring unit measuring the voltage of the current measurement resistance at the time when the pre-charge switch is turned on, calculating the current and transmitting the current to the controller; And (C) the control unit turning on the main first switch after a predetermined time and turning off the precharge switch.
또한, 본 발명의 방법은 (D) 상기 배터리 팩과 상기 메인 제1 스위치 및 프리 차지 스위치 사이에 설치된 전류 변환부가 상기 고전위 선로에 흐르는 전류를 검출하여 상기 제어부로 전송하는 단계; 및 (E) 상기 제어부가 상기 전류 변환부에서 측정한 전류값과 상기 전류 측정부에서 측정한 전류값을 비교하여 상기 전류변환부의 이상 여부를 판단하는 단계를 더 포함한다.In addition, the method of the present invention includes the steps of (D) detecting the current flowing in the high potential line current conversion unit installed between the battery pack and the main first switch and the precharge switch to the control unit; And (E) comparing the current value measured by the current converter with the current value measured by the current measurer to determine whether the current converter is abnormal.
또한, 본 발명의 방법의 상기 (B) 단계는 (B-1) 전류 측정부의 전압 센싱기가 상기 프리 차지 스위치가 턴온 시간에 전류 측정용 저항의 전압을 측정하는 단계; (B-2) 전류 측정부의 A/D 변환기가 상기 전압 센싱기에서 센싱한 전압 신호를 디지털 신호로 변환하는 단계; 및 (B-3) 전류 측정부의 제어기가 상기 A/D 변환기에서 출력되는 디지털화된 전압 신호에서 전류값을 산출하여 제어부로 전송하는 단계를 포함한다.In addition, the step (B) of the method of the present invention includes the steps of (B-1) the voltage sensor of the current measuring unit to measure the voltage of the resistance for measuring the current at the pre-charge switch turn-on time; (B-2) converting the voltage signal sensed by the voltage sensor into a digital signal by an A / D converter of the current measuring unit; And (B-3) the controller of the current measuring unit calculates a current value from the digitized voltage signal output from the A / D converter and transmits the current value to the controller.
본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다.The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.
이에 앞서 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이고 사전적인 의미로 해석되어서는 아니되며, 발명자가 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합되는 의미와 개념으로 해석되어야만 한다.Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best describe their own invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.
상기와 같은 본 발명에 따르면, 릴레이 단에 설치된 저항을 통하여 전류를 측정하도록 구성하기 때문에 외부 노이즈 간섭을 받지 않고 정확한 전류 측정이 가능하도록 한다.According to the present invention as described above, since it is configured to measure the current through a resistor installed in the relay stage, it is possible to accurately measure the current without receiving external noise interference.
또한, 본 발명에 따르면, 릴레이 단에 설치된 저항을 통하여 전류를 측정하여 내부의 전류 측정용 홀 센서의 이상을 감지하여 보정할 수 있도록 한다.In addition, according to the present invention, by measuring the current through a resistor installed in the relay stage to detect and correct the abnormality of the internal current measuring hall sensor.
도 1은 본 발명의 일실시예에 따른 배터러 전류 측정 장치의 구성도이다.1 is a block diagram of a battery current measuring device according to an embodiment of the present invention.
도 2는 도 1의 스위치 파형도이다.FIG. 2 is a switch waveform diagram of FIG. 1.
도 3은 본 발명의 다른 실시예에 따른 배터러 전류 측정 장치의 구성도이다.3 is a block diagram of a battery current measuring device according to another embodiment of the present invention.
도 4는 도 1 및 3의 전류 측정부의 상세 구성도이다.4 is a detailed configuration diagram of the current measuring unit of FIGS. 1 and 3.
도 5는 본 발명의 일실시예에 따른 배터러 전류 측정 방법의 흐름도이다.5 is a flowchart of a method for measuring a battery current according to an embodiment of the present invention.
본 발명의 목적, 특정한 장점들 및 신규한 특징들은 첨부된 도면들과 연관되어지는 이하의 상세한 설명과 바람직한 실시예들로부터 더욱 명백해질 것이다. 본 명세서에서 각 도면의 구성요소들에 참조번호를 부가함에 있어서, 동일한 구성 요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 번호를 가지도록 하고 있음에 유의하여야 한다. 또한, "제1", "제2", "일면", "타면" 등의 용어는 하나의 구성요소를 다른 구성요소로부터 구별하기 위해 사용되는 것으로, 구성요소가 상기 용어들에 의해 제한되는 것은 아니다. 이하, 본 발명을 설명함에 있어서, 본 발명의 요지를 불필요하게 흐릴 수 있는 관련된 공지 기술에 대한 상세한 설명은 생략한다.The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components as possible, even if displayed on different drawings have the same number as possible. In addition, terms such as “first”, “second”, “one side”, “other side”, etc. are used to distinguish one component from another component, and a component is limited by the terms. no. In the following description, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of the present invention will be omitted.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시형태를 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 일실시 예에 따른 배터리 전류 측정 장치의 구성도이다.1 is a configuration diagram of a battery current measuring device according to an embodiment of the present invention.
도 1을 참조하면, 본 발명의 일실시 예에 따른 배터리 전류 측정 장치는 배터리 팩(110)과 부하(190) 사이에 위치하는 프리 차지 스위치(120), 프리 차지 저항(130), 전류측정용 저항(140), 메인 제1 스위치(150), 메인 제2 스위치(160), 전류 측정부(170) 및 제어부(180)를 포함한다.Referring to FIG. 1, a battery current measuring apparatus according to an embodiment of the present invention includes a precharge switch 120, a precharge resistor 130, and a current measurement positioned between the battery pack 110 and a load 190. The resistor 140 includes a main first switch 150, a main second switch 160, a current measuring unit 170, and a controller 180.
여기에서, 배터리 팩(110)은 반복적인 충방전이 가능한 다수의 단위 셀이 직렬 또는 병렬로 연결된 셀 어셈블리를 포함한다. Here, the battery pack 110 includes a cell assembly in which a plurality of unit cells capable of repetitive charging and discharging are connected in series or in parallel.
상기 단위 셀은 울트라 캐패시터를 포함하는 전기 이중층 캐패시터 또는 리튬 이온 전지, 리튬 폴리머 전지, 니켈 카드늄 전지, 니켈 수소 전지, 니켈 아연 전지 등과 같은 공지의 2차 전지이다.The unit cell is a known secondary battery such as an electric double layer capacitor or a lithium ion battery including an ultracapacitor, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and the like.
그리고, 상기 프리 차지 스위치(120)는 고전위 선로의 바이 패스 선로 상에 설치되며, 프리 차지 저항(130) 및 전류측정용 저항(140)과 직렬 접속된다.The precharge switch 120 is installed on the bypass line of the high potential line, and is connected in series with the precharge resistor 130 and the current measuring resistor 140.
또한, 상기 메인 제1 스위치(150)는 배터리 팩(110)의 양극과 부하(190)를 연결한 고전위 선로(Pack+) 상에 설치된다.In addition, the main first switch 150 is installed on the high potential line Pack + connecting the positive electrode of the battery pack 110 and the load 190.
상기 메인 제2 스위치(160)는 배터리 팩(110)의 음극과 부하(190)를 연결한 저전위 선로(Pack-) 상에 설치된다. The main second switch 160 is installed on a low potential line Pack- which connects the negative electrode of the battery pack 110 and the load 190.
바람직하게, 상기 프리 차지 스위치(120), 메인 제1 스위치(150) 및 메인 제2 스위치(160)는 릴레이로 구성한다. 하지만 본 발명은 배터리 팩(110)과 부하(190)를 연결하는 스위치의 종류에 의해 한정되지 않는다.Preferably, the precharge switch 120, the main first switch 150, and the main second switch 160 are configured as relays. However, the present invention is not limited by the type of switch connecting the battery pack 110 and the load 190.
다음으로, 상기 프리 차지 저항(130)과 전류측정용 저항(140)은 서로 직렬로 연결되어 있으며, 고전위 선로의 바이 패스 선로 상에 설치된다.Next, the precharge resistor 130 and the current measuring resistor 140 are connected to each other in series, and are installed on the bypass line of the high potential line.
이와 같은 상기 프리 차지 저항(130)과 전류측정용 저항(140)은 프리 차지 스위치(120)와 부하(190) 사이에 위치하여 프리 차지 스위치(120)가 턴온된 경우에 배터리 팩(110)으로부터 부하(190)에 공급되는 전류가 과도하게 흐르지 않도록 제한한다.The pre-charge resistor 130 and the current measuring resistor 140 are located between the pre-charge switch 120 and the load 190 so that the pre-charge switch 120 is turned on from the battery pack 110. The current supplied to the load 190 is limited so as not to flow excessively.
그리고 이중에서 상기 전류측정용 저항(140)은 배터리 팩(110)으로부터 부하(190)에 공급되는 전류가 과도하게 흐르지 않도록 제한할 뿐만 아니라, 전류 측정부(170)에 양단의 전압차를 제공하여 전류를 측정할 수 있도록 한다.In addition, the current measuring resistor 140 not only prevents the current supplied from the battery pack 110 to the load 190 from excessively flowing, but also provides a voltage difference between both ends of the current measuring unit 170. Allow the current to be measured.
여기에서, 프리 차지 저항(130)가 전류측정용 저항(140)을 각각 구비하도록 하였으나, 이중에서 전류측정용 저항(140)만을 구비하여 전류 제한과 전류 측정의 기능을 수행하도록 할 수도 있다.Here, the pre-charge resistor 130 has a current measuring resistor 140, respectively, but only the current measuring resistor 140 may be performed to perform the functions of current limiting and current measuring.
다음으로, 상기 전류 측정부(170)는 상기 프리 차지 스위치(120)가 턴온된 경우에 전류측정용 저항(140)의 양단의 전압을 측정하여 전류 측정용 저항(140)에 흐르는 전류를 측정한다.Next, when the precharge switch 120 is turned on, the current measuring unit 170 measures the voltage across the current measuring resistor 140 to measure the current flowing through the current measuring resistor 140. .
다음으로, 제어부(180)는 부하(190)와 부하(190)에 전원을 공급하는 배터리 팩(110)의 전송선로 상에 배치된 프리 차지 스위치(120), 메인 제1 스위치(150) 및 메인 제2스위치(160)의 동작을 전반적으로 제어한다.Next, the controller 180 includes a precharge switch 120, a main first switch 150, and a main disposed on the transmission line of the load 190 and the battery pack 110 supplying power to the load 190. Overall operation of the second switch 160 is controlled.
한편, 상기 부하(190)는 배터리 팩(110)으로부터 인가되는 방전전압을 다른 전압 레벨로 변환하는 전압변환장치이다.On the other hand, the load 190 is a voltage conversion device for converting the discharge voltage applied from the battery pack 110 to another voltage level.
이러한 부하(190)는 DC 링크 커패시터(192), 저전압 DC-DC 컨버터(194), 배터리(196)를 포함한다. This load 190 includes a DC link capacitor 192, a low voltage DC-DC converter 194, and a battery 196.
하지만, 본 발명은 부하(190)의 종류에 의해 한정되지 않으므로, 부하(190)는 배터리 팩(110)으로부터 동작 전원을 인가받는 어떠한 장치나 시스템도 포함하는것으로 이해되어야 하며, 일예로 상기 부하(190)는 배터리 팩(110)으로부터 전원을 공급받아 동력을 생산하는 모터일 수 있다.However, the present invention is not limited by the type of the load 190, the load 190 should be understood to include any device or system that receives the operating power from the battery pack 110, for example the load ( 190 may be a motor that receives power from the battery pack 110 and generates power.
이와 같이 구성되는 본 발명의 일실시예에 따른 배터리 전류 측정 장치의 동작을 살펴보면 다음과 같다.Looking at the operation of the battery current measuring device according to an embodiment of the present invention configured as described above are as follows.
상기 제어부(180)는 배터리 팩(110)과 부하(190)를 연결할 때에는 도 2에 도시된 바와 같이 메인 제2스위치(160), 프리 차지 스위치(120), 및 메인 제1 스위치(150) 순서로 스위치들을 턴온시키고, 메인 제1 스위치(150)가 턴온되면 일정 시간 이후에 프리 차지 스위치(120)를 턴오프시킨다.When the controller 180 connects the battery pack 110 and the load 190, the main second switch 160, the precharge switch 120, and the main first switch 150 are shown in FIG. 2. The low switches are turned on, and when the main first switch 150 is turned on, the precharge switch 120 is turned off after a predetermined time.
이와 같은 동작에서 먼저 프리 차지 스위치(120) 및 메인 제2 스위치(160)가 턴온되어 프리-차지 저항(130)과 전류측정용 저항(140)을 통해 전류가 흐르면서 부하(190)의 DC 링크 커패시터(192)를 충전한다. In this operation, first, the pre-charge switch 120 and the main second switch 160 are turned on so that a current flows through the pre-charge resistor 130 and the current measuring resistor 140, and thus the DC link capacitor of the load 190. Charge 192.
이러한 과정이 진행되는 동안에 전류 측정부(170)는 도 2에 도시된 센싱 타임(sensing time)에 전류측정용 저항(140)의 양단의 전압을 측정하여 전류 측정용 저항(140)을 통해 흐르는 전류를 측정하고, 측정된 전류값을 제어부(180)로 전송한다.During this process, the current measuring unit 170 measures the voltage at both ends of the current measuring resistor 140 at the sensing time shown in FIG. 2 to flow through the current measuring resistor 140. Measure and transmit the measured current value to the controller 180.
그 다음에 상기 DC 링크 커패시터(192)가 어느 정도 충전이 되면 메인 제1 스위치(150)가 턴온된다. 따라서 프리 차지 저항(120)과 전류 측정용 저항(140) 쪽으로는 더 이상 전류가 흐르지 않고, 메인 제1 스위치(150) 및 메인 제2 릴레이(160)를 통해서만 전류가 흐르게 된다.Then, when the DC link capacitor 192 is charged to some extent, the main first switch 150 is turned on. Therefore, no current flows further toward the precharge resistor 120 and the current measurement resistor 140, and the current flows only through the main first switch 150 and the main second relay 160.
이처럼 메인 제1 스위치(150)가 턴온되어 프리 차지 저항(120)과 전류 측정용 저항(140) 쪽으로는 더 이상 전류가 흐르지 않으면 전류 측정부(170)는 전류 측정이 가능하지 않다.As such, when the main first switch 150 is turned on and no more current flows toward the pre-charge resistor 120 and the current measuring resistor 140, the current measuring unit 170 may not measure the current.
상기와 같은 본 발명에 따르면, 릴레이 단에 설치된 전류 측정용 저항(140)을 통하여 전류를 측정하도록 구성하였기 때문에 외부 노이즈 간섭을 받지 않고 정확한 전류 측정이 가능하도록 한다.According to the present invention as described above, since it is configured to measure the current through the current measuring resistor 140 installed in the relay stage to enable accurate current measurement without receiving external noise interference.
도 3은 본 발명의 다른 실시 예에 따른 배터리 전류 측정 장치의 구성도이다.3 is a block diagram of a battery current measuring device according to another embodiment of the present invention.
도 3을 참조하면, 본 발명의 다른 실시예에 따른 배터리 전류 측정 장치는 추가적으로 배터리 팩(110)과 스위치단 사이의 고전위 선로에 전류 변환부(200)를 추가적으로 구비하여 스위치단 앞의 고전위 선로에 흐르는 전류를 측정한다.Referring to FIG. 3, the battery current measuring device according to another embodiment of the present invention additionally includes a current converting unit 200 in a high potential line between the battery pack 110 and the switch stage, thereby providing a high potential in front of the switch stage. Measure the current flowing through the line.
이처럼 전류 변환부(200)에 의해 측정된 전류값은 제어부(180)로 전송되어 배터리 팩(110)의 관리 등에 이용된다.As such, the current value measured by the current converter 200 is transmitted to the controller 180 and used for management of the battery pack 110.
이때, 상기 제어부(180)는 전류 측정부(170)를 통하여 측정한 전류값과 전류 변환부(200)를 통하여 측정한 전류값을 비교하여 전류 변환부(200)의 이상 여부를 판단할 수 있다.In this case, the controller 180 may determine whether the current converter 200 is abnormal by comparing the current value measured by the current measuring unit 170 with the current value measured by the current converter 200. .
상기 제어부(180)는 판단 결과, 측정값이 서로 상이한 경우에 전류 변환부(200)의 고장으로 판단하고 그 결과를 사용자등에게 알려준다.As a result of the determination, when the measured values are different from each other, the controller 180 determines that the current converter 200 is out of order and informs the result to the user.
여기에서 전류 변환부(200)는 오픈 루프 타입 홀 센서(Open Loop Type Hall Effect Current Sensor) 또는 클로즈드 루프 타입 홀 센서(Closed Loop Type Hall Effect Current Sensor)일 수 있으며, 상기 고장 판단은 홀센서의 고장 판단으로 이루어진다.The current converter 200 may be an open loop type hall effect current sensor or a closed loop type hall effect current sensor, and the failure determination may be a failure of the hall sensor. Judgment is made.
이와 같은 다른 실시예에 따른 배터리 전류 측정 장치의 그외 동작은 일실시예에 따른 배터리 전류 측정 장치와 동일하기 때문에 생략한다. Since other operations of the battery current measuring apparatus according to the other embodiment is the same as the battery current measuring apparatus according to an embodiment it will be omitted.
상기와 같은 본 발명에 따르면, 릴레이 단에 설치된 저항을 통하여 전류를 측정하여 내부의 전류 측정용 홀 센서의 이상을 감지하여 보정할 수 있도록 한다.According to the present invention as described above, by measuring the current through the resistor installed in the relay stage to detect and correct the abnormality of the internal current measuring hall sensor.
도 4는 도 1 및 3의 전류 측정부의 상세 구성도이다.4 is a detailed configuration diagram of the current measuring unit of FIGS. 1 and 3.
도 4를 참조하면, 도 1 및 3의 전류 측정부는 전압 센싱기(210)와, A/D 변환기(220)와, 제어기(230) 및 통신기(240)를 포함한다.Referring to FIG. 4, the current measuring unit of FIGS. 1 and 3 includes a voltage sensor 210, an A / D converter 220, a controller 230, and a communicator 240.
상기 전압 센싱기(210)는 전류측정용 저항(140)의 양단(ND1,ND2)에 걸리는 전압을 센싱하여 출력한다.The voltage sensor 210 senses and outputs a voltage applied to both ends ND1 and ND2 of the resistor 140 for current measurement.
그리고, 상기 A/D 변환기(220)는 전압 센싱기(210)로부터 출력되는 전압신호를 디지털신호로 변환하여 출력한다.The A / D converter 220 converts the voltage signal output from the voltage sensor 210 into a digital signal and outputs the digital signal.
상기 제어기(230)는 상기 A/D 변환기(220)로부터 출력되는 디지털화된 전압 신호를 입력받아 전류를 산출하여 상기 통신기(240)를 통하여 제어부(180) 등에 전송한다.The controller 230 receives a digitized voltage signal output from the A / D converter 220, calculates a current, and transmits the current to the controller 180 through the communicator 240.
한편, 통신기(240)는 제어부(180) 등과 통신을 수행하기 위한 것으로 CAN, 지그비, WIFI, 블루투스, 적외선 데이터 통신, 전력선 통신, USB, SERIAL 중 적어도 하나의 방식을 사용하여 통신한다.Meanwhile, the communicator 240 communicates with the controller 180 using at least one of CAN, Zigbee, WIFI, Bluetooth, infrared data communication, power line communication, USB, and SERIAL.
이와 같이 구성되는 전류 측정부의 동작을 살펴보면 다음과 같다.Looking at the operation of the current measuring unit is configured as follows.
상기 배터리 팩(110)으로부터 부하(190)에 전류를 공급하기 위해서 메인 제1 스위치(150)가 턴온되기 이전에 프리 차지 스위치(120)가 먼저 턴온된다.In order to supply current from the battery pack 110 to the load 190, the precharge switch 120 is first turned on before the main first switch 150 is turned on.
이처럼 프리 차지 스위치(120)가 턴온되면, 상기 전압 센싱기(210)는 전류 측정용 저항(140)의 양단(ND1,ND2)에 걸리는 전압을 센싱하여 출력한다.As such, when the precharge switch 120 is turned on, the voltage sensor 210 senses and outputs a voltage across both ends ND1 and ND2 of the current measuring resistor 140.
그리고, 상기 A/D 변환기(220)는 전압 센싱기(210)로 부터 출력되는 전압신호를 디지털신호로 변환하여 출력하며, 상기 제어기(230)는 상기 A/D 변환기(220)로부터 출력되는 디지털화된 전압 신호를 입력받아 전류를 산출한다.The A / D converter 220 converts the voltage signal output from the voltage sensor 210 into a digital signal and outputs the digital signal. The controller 230 digitizes the digital signal output from the A / D converter 220. The current is calculated by receiving the received voltage signal.
이때, 전류측정용 저항(140)의 저항값이 R이라 하고, 전압 센싱기(210)가 측정한 전압이 Vd라고 하면, 측정되는 전류 I라고 하면 아래 수학식1과 같이 된다.At this time, if the resistance value of the current measuring resistor 140 is R, and the voltage measured by the voltage sensor 210 is Vd, the measured current I is expressed by Equation 1 below.
수학식 1
Figure PCTKR2013010905-appb-M000001
 Equation 1
Figure PCTKR2013010905-appb-M000001
상기 제어기(230)는 산출된 전류값을 제어부(180)로 통신기(240)를 통하여 전송한다.The controller 230 transmits the calculated current value to the controller 180 through the communicator 240.
도 5는 본 발명의 일실시예에 따른 배터리 전류 측정 방법의 흐름도이다.5 is a flowchart of a battery current measuring method according to an embodiment of the present invention.
도 5를 참조하면, 본 발명의 일실시예에 따른 배터리 전류 측정 방법은 먼저 상기 제어부가 배터리 팩과 부하를 연결할 때에 메인 제2 스위치를 턴온시키고(S110) 일정 시간 이후에 프리 차지 스위치를 턴온시킨다(S120).Referring to FIG. 5, the battery current measuring method according to an embodiment of the present invention first turns on the main second switch when the controller connects the battery pack and the load (S110) and turns on the precharge switch after a predetermined time. (S120).
이와 같은 동작에 의해 프리 차지 스위치 및 메인 제2 스위치가 턴온되어 프리-차지 저항과 전류측정용 저항을 통해 전류가 흐르면서 부하의 DC 링크 커패시터를 충전한다. By this operation, the precharge switch and the main second switch are turned on to charge the DC link capacitor of the load while current flows through the pre-charge resistor and the current measurement resistor.
이러한 과정이 진행되는 동안에 전류 측정부의 전압 센싱기는 전류 측정용 저항의 양단의 전압을 측정하여 출력한다(S130).During this process, the voltage sensor of the current measuring unit measures and outputs the voltage at both ends of the current measuring resistor (S130).
그러면, 전류 측정부의 A/D 변환기가 아날로그 신호인 전압 센싱기의 전압 신호를 디지털 신호로 변환하여 출력하여 이후에 디지털 신호 처리가 가능하도록 한다(S140).Then, the A / D converter of the current measuring unit converts the voltage signal of the voltage sensor, which is an analog signal, into a digital signal and outputs the digital signal, thereby enabling digital signal processing (S140).
그러면, 전류 측정부의 제어기가 위의 수학식 1에 의해 전류값을 산출하여 통신기를 통하여 제어부로 전송한다(S150).Then, the controller of the current measuring unit calculates the current value by the above Equation 1 and transmits the current value to the controller through the communicator (S150).
이처럼, 제어부가 전류 측정부의 제어기로부터 산출된 전류값을 전송받으면 이상유무를 확인하고, 이후에 메인 제1 스위치를 턴온시키고(S160), 프리 차지 스위치를 턴 오프시킨다(S170).As such, when the controller receives the current value calculated from the controller of the current measuring unit, the controller checks whether there is an abnormality, then turns on the main first switch (S160), and turns off the precharge switch (S170).
상기와 같은 본 발명에 따르면, 릴레이 단에 설치된 전류 측정용 저항(140)을 통하여 전류를 측정하도록 구성하였기 때문에 외부 노이즈 간섭을 받지 않고 정확한 전류 측정이 가능하도록 한다.According to the present invention as described above, since it is configured to measure the current through the current measuring resistor 140 installed in the relay stage to enable accurate current measurement without receiving external noise interference.
한편, 본 발명의 방법의 다른 실시예로, 추가적으로 홀 센서로 구성된 전류 변환부를 구비하여 고전위 선로에 흐르는 전류를 측정하여 제어부로 전송하고, 제어부는 전류 측정부를 통하여 측정한 전류값과 홀 센서로 구성된 전류 변환부를 통하여 측정한 전류값을 비교하여 전류 변환부의 이상-좀더 구체적으로 홀 센서의 이상- 여부를 판단하도록 할 수 있다.On the other hand, in another embodiment of the method of the present invention, it is provided with a current conversion unit consisting of a Hall sensor additionally measures the current flowing in the high potential line to the control unit, the control unit to the current value and the Hall sensor measured through the current measuring unit By comparing current values measured through the configured current converter, it is possible to determine whether an abnormality of the current converter-more specifically, that the hall sensor is abnormal.
그리고, 제어부는 판단 결과, 측정값이 서로 상이한 경우에 전류 변환부(홀 센서)의 고장으로 판단하고 그 결과를 사용자등에게 알려주도록 할 수 있다.The controller may determine that the current conversion unit (hall sensor) is out of order when the measured values are different from each other, and inform the user of the result.
상기와 같은 본 발명의 다른 실시예에 따르면, 릴레이 단에 설치된 저항을 통하여 전류를 측정하여 내부의 전류 측정용 홀 센서의 이상을 감지하여 보정할 수 있도록 한다.According to another embodiment of the present invention as described above, by measuring the current through a resistor installed in the relay stage it is possible to detect and correct the abnormality of the hall sensor for measuring current inside.
이상에서는 본 발명의 바람직한 실시 예에 대하여 도시하고 설명하였지만 본 발명은 상술한 특정의 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어서는 안 될 것이다.Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described specific embodiments, and the present invention is not limited to the specific scope of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.
[부호의 설명][Description of the code]
110 : 배터리 팩 110: battery pack
120 : 프리 차지 스위치120: precharge switch
130 : 프리 차지 저항 130: precharge resistor
140 : 전류측정용 저항 140: resistance for current measurement
150 : 메인 제1 스위치 150: main first switch
160 : 메인 제2 스위치160: main second switch
170 : 전류 측정부 170: current measuring unit
180 : 제어부180: control unit
190 : 부하 190: load
200 : 전류 변환부200: current converter
210 : 전압 센싱기 210: voltage sensor
220 : A/D 변환기220: A / D converter
230 : 제어기 230: controller
240 : 통신기240: communicator

Claims (11)

  1. 배터리 팩과 부하 사이의 고전위 선로에 설치된 메인 제1 스위치;A main first switch installed on the high potential line between the battery pack and the load;
    배터리 팩과 부하 사이의 고전위 선로에 상기 메인 제1 스위치와 병렬 연결된 프리 차지 스위치;A precharge switch connected in parallel with the main first switch on a high potential line between a battery pack and a load;
    배터리 팩과 부하 사이의 저전위 선로에 설치된 메인 제2 스위치;A main second switch installed at a low potential line between the battery pack and the load;
    상기 프리 차지 스위치와 부하 사이에 설치된 전류 측정용 저항; A resistance for measuring current installed between the precharge switch and the load;
    상기 전류 측정용 저항의 양단의 전압을 측정하여 전류값을 산출하는 전류 측정부; 및 A current measuring unit measuring a voltage across both ends of the current measuring resistor and calculating a current value; And
    상기 메인 제1 스위치와, 메인 제2 스위치 및 프리 차지 스위치를 제어하고, 상기 전류 측정부에서 산출한 전류값을 전송받는 제어부를 포함하는 배터리 전류 측정 장치.And a controller which controls the main first switch, the main second switch, and the precharge switch, and receives a current value calculated by the current measuring unit.
  2. 청구항 1에 있어서,  The method according to claim 1,
    상기 프리 차지 스위치와 부하 사이에 상기 전류 측정용 저항과 직렬로 설치된 프리 차지 저항을 더 포함하는 배터리 전류 측정 장치.And a precharge resistor disposed in series with the current measurement resistor between the precharge switch and the load.
  3. 청구항 1에 있어서, The method according to claim 1,
    상기 제어부는 상기 메인 제2 스위치를 턴온한 후에 프리 차지 스위치를 턴온하고, 일정 시간 후에 메인 제1 스위치를 턴온하며, 상기 프리 차지 스위치를 턴오프하며, The control unit turns on the precharge switch after turning on the main second switch, turns on the main first switch after a predetermined time, turns off the precharge switch,
    상기 전류 측정부는 상기 프리 차지 스위치가 턴온된 시간에 전류 측정용 저항의 전압을 측정하여 전류를 산출하는 배터리 전류 측정 장치.And the current measuring unit calculates a current by measuring a voltage of a current measuring resistor at a time when the precharge switch is turned on.
  4. 청구항 1에 있어서, The method according to claim 1,
    상기 전류 측정부는 The current measuring unit
    상기 전류 측정용 저항의 양단의 전압을 센싱하는 전압 센싱기;A voltage sensor configured to sense a voltage across both ends of the current measuring resistor;
    상기 전압 센싱기에서 센싱한 전압 신호를 디지털 신호로 변환하는 A/D 변환기; An A / D converter for converting the voltage signal sensed by the voltage sensor into a digital signal;
    상기 제어부와 통신하는 통신기; 및 A communicator in communication with the control unit; And
    상기 A/D 변환기에서 출력되는 디지털화된 전압 신호에서 전류값을 산출하여 상기 통신기를 통하여 제어부로 전송하는 제어기를 포함하는 배터리 전류 측정 장치.And a controller for calculating a current value from the digitized voltage signal output from the A / D converter and transmitting the current value to the controller through the communicator.
  5. 청구항 1에 있어서, The method according to claim 1,
    상기 배터리 팩과 상기 메인 제1 스위치 및 프리 차지 스위치 사이에 설치되어 상기 고전위 선로에 흐르는 전류를 검출하여 상기 제어부로 전송하는 전류 변환부를 더 포함하는 배터리 전류 측정 장치.And a current converter installed between the battery pack, the main first switch, and the precharge switch to detect and transmit a current flowing in the high potential line to the controller.
  6. 청구항 5에 있어서,The method according to claim 5,
    상기 제어부는 상기 전류 변환부에서 측정한 전류값과 상기 전류 측정부에서 측정한 전류값을 비교하여 상기 전류 변환부의 이상 여부를 판단하는 배터리 전류 측정 장치.The controller compares the current value measured by the current converter and the current value measured by the current measuring unit to determine whether the current converter is abnormal.
  7. 청구항 5에 있어서,The method according to claim 5,
    상기 전류 변환부는 오픈 루프 타입 홀 센서(Open Loop Type Hall Effect Current Sensor)로 이루어진 배터리 전류 측정 장치. The current converter is a battery current measuring device consisting of an open loop type Hall Effect Current Sensor.
  8. 청구항 5에 있어서,The method according to claim 5,
    상기 전류 변환부는 클로즈드 루프 타입 홀 센서(Closed Loop Type Hall Effect Current Sensor)로 이루어진 배터리 전류 측정 장치. The current converter is a battery current measuring device consisting of a closed loop type Hall Effect Current Sensor.
  9. (A) 제어부가 메인 제2 스위치를 턴온한 후에 프리 차지 스위치를 턴온하는 단계; (A) the controller turning on the precharge switch after turning on the main second switch;
    (B) 전류 측정부가 상기 프리 차지 스위치가 턴온된 시간에 전류 측정용 저항의 전압을 측정하여 전류를 산출하여 제어부로 전송하는 단계; 및(B) a current measuring unit measuring the voltage of the current measurement resistance at the time when the pre-charge switch is turned on, calculating the current and transmitting the current to the controller; And
    (C) 상기 제어부가 일정 시간 후에 메인 제1 스위치를 턴온하며, 상기 프리 차지 스위치를 턴오프하는 단계를 포함하는 배터리 전류 측정 방법.(C) the controller turning on the main first switch after a predetermined time, and turning off the precharge switch.
  10. 청구항 9항에 있어서, The method of claim 9,
    (D) 상기 배터리 팩과 상기 메인 제1 스위치 및 프리 차지 스위치 사이에 설치된 전류 변환부가 상기 고전위 선로에 흐르는 전류를 검출하여 상기 제어부로 전송하는 단계; 및 (D) detecting a current flowing in the high potential line by a current converter installed between the battery pack, the main first switch and the precharge switch, and transmitting the current to the controller; And
    (E) 상기 제어부가 상기 전류 변환부에서 측정한 전류값과 상기 전류 측정부에서 측정한 전류값을 비교하여 상기 전류변환부의 이상 여부를 판단하는 단계를 더 포함하는 배터리 전류 측정 장치.(E) the battery current measuring device further comprising the step of determining whether the current converter is abnormal by comparing the current value measured by the current measuring unit with the current value measured by the current measuring unit.
  11. 청구항 9항에 있어서, The method of claim 9,
    상기 (B) 단계는 Step (B) is
    (B-1) 전류 측정부의 전압 센싱기가 상기 프리 차지 스위치가 턴온 시간에 전류 측정용 저항의 전압을 측정하는 단계;(B-1) measuring, by the voltage sensor of the current measuring unit, the voltage of the current measuring resistor during the turn-on time of the precharge switch;
    (B-2) 전류 측정부의 A/D 변환기가 상기 전압 센싱기에서 센싱한 전압 신호를 디지털 신호로 변환하는 단계; 및 (B-2) converting the voltage signal sensed by the voltage sensor into a digital signal by an A / D converter of the current measuring unit; And
    (B-3) 전류 측정부의 제어기가 상기 A/D 변환기에서 출력되는 디지털화된 전압 신호에서 전류값을 산출하여 제어부로 전송하는 단계를 포함하는 배터리 전류 측정 방법.(B-3) a battery current measuring method comprising the step of the controller of the current measuring unit calculates the current value from the digitized voltage signal output from the A / D converter and transmits it to the controller.
PCT/KR2013/010905 2012-11-30 2013-11-28 Apparatus for measuring current of battery and method therefor WO2014084628A1 (en)

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