CN102680902A - Consistency on-line monitoring device and method for motive power battery pack for electric automobile - Google Patents
Consistency on-line monitoring device and method for motive power battery pack for electric automobile Download PDFInfo
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- CN102680902A CN102680902A CN2012101454712A CN201210145471A CN102680902A CN 102680902 A CN102680902 A CN 102680902A CN 2012101454712 A CN2012101454712 A CN 2012101454712A CN 201210145471 A CN201210145471 A CN 201210145471A CN 102680902 A CN102680902 A CN 102680902A
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Abstract
The invention discloses a consistency on-line monitoring device and method for a motive power battery pack for an electric automobile, wherein the consistency on-line monitoring device for the motive power battery pack for the electric automobile comprises a singlechip, a voltage detection circuit, a current detection circuit, a temperature detection circuit and a signal processing circuit; the input end of the voltage detection circuit is connected with the I/O (input/output) port of the singlechip; the output end of the voltage detection circuit is connected with the signal processing circuit; the signal processing circuit is connected with the singlechip; and the current detection circuit and the temperature detection circuit are respectively connected with the singlechip through the signal processing circuit. According to the invention, the value quantization index of the battery pack consistency is obtained through performing data processing on the detected voltage, current and temperature data, the digital quantization of the battery pack consistency index is realized, the measurement is rapid and efficient, and the result is accurate and reliable.
Description
Technical field
The invention belongs to the electric automobile applied technical field, specially refer to a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device and method.
Background technology
Along with the aggravation of energy crisis and environmental problem, the research of pure electric automobile and hybrid vehicle has obtained the extensive concern of various countries.Generally below 6V, need the series connection of more piece cell in the practical application is that an electric battery is to reach required voltage to the monomer voltage of used for electric vehicle electrokinetic cell.Automobile start and stop in the process of moving are frequent and operating mode is complicated; If the consistance of each cell is bad; In charge and discharge process, can strengthen the difference between each monomer, cause that easily the mistake of partial monosomy battery is put or overcharged, and cause the cycle performance decay or the inefficacy of power battery pack.Therefore just need a kind of cell to carry out the method and the device of consistance on-line monitoring to the used for electric vehicle power battery pack.
Summary of the invention
By Given this; The purpose of this invention is to provide a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device and method; Through detected voltage, electric current and temperature data being carried out the numerical quantization index that data processing obtains consistency of battery pack;, realized the digital quantization of consistency of battery pack index, measure rapidly and efficiently, the result accurately and reliably.
To achieve these goals, the present invention adopts following technical scheme:
A kind of used for electric vehicle power battery pack consistance on-Line Monitor Device; Wherein, described used for electric vehicle power battery pack consistance on-Line Monitor Device comprises single-chip microcomputer, voltage detecting circuit, current detection circuit, temperature sensing circuit and signal processing circuit; Described voltage detecting circuit input end is connected with the I/O port of single-chip microcomputer, and output terminal is connected with signal processing circuit, and signal processing circuit connects single-chip microcomputer, and said current detection circuit, temperature sensing circuit connect single-chip microcomputer through signal processing circuit respectively.
Further, described voltage detecting circuit comprises decoder circuit, sequencing circuit and battery selection circuit, and said battery selects circuit to comprise a plurality of photoelectric relays; The I/O port of described single-chip microcomputer is connected with the input end of decoder circuit; The output terminal of decoder circuit is at least two-way; Each road output terminal is through the two paths of signals of the free sequencing of output device behind the sequencing circuit; Described two paths of signals preceding be the ground switching signal, after be the detector switch signal; Ground switching signal, the photoelectric relay that the detector switch signal is corresponding with it respectively connect.Ground switching signal with its one to one first pin of photoelectric relay be connected, the detector switch signal with its one to one the 3rd pin of photoelectric relay be connected.The 8th pin of described photoelectric relay is connected with the positive pole of cell; The 6th pin of photoelectric relay is connected with the negative pole of cell; The 7th pin of photoelectric relay is connected with the input of signal acquisition circuit; The output terminal of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data storage of I/O port input is in the storer of single-chip microcomputer.
Further; Described sequencing circuit is the ground on-off circuit and the detector switch circuit of parallel connection; The ground on-off circuit just is made up of with door and the not gate of connecting a series connection; The detector switch circuit is made up of the positive or gate of a series connection and the not gate of series connection, and ground on-off circuit and detector switch circuit accept to export signal simultaneously, is output as low switch signal and detector switch signal with time order and function order.
Further; Described current detection circuit is gathered the current value of electric battery major loop through current sensor; Be input in the signal processing circuit, the output of said signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data storage of I/O port input is in the storer of single-chip microcomputer.
Further; Described temperature sensing circuit is gathered the temperature value of electric battery through temperature sensor; Be input in the signal processing circuit, the output of said signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data storage of I/O port input is in the storer of single-chip microcomputer.
Further, described decoder circuit adopts 3/8 line decoder chip of standard, and output low level is effective.
Further, also comprise power circuit, described power circuit is the power module that carries isolation; Power unit is isolated into analog power part and digital power part; It is anodal that analog power partly has simulation, simulation ground, and it is anodal that digital power partly has numeral; Digitally, simulation ground is connected with the 5th pin of above-mentioned photoelectric relay.
Further, the quantity of said photoelectric relay is consistent and corresponding one by one with the quantity of battery cell.
A kind of used for electric vehicle power battery pack consistance on-line monitoring method may further comprise the steps:
A: voltage, electric current and the temperature of above-mentioned battery testing system collection and record cell, in the electric automobile during traveling process, detected once in per 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T representes the environment temperature of battery.Note R1=V1/I; R2=V2/I; And the like; R8=V8/I; R1-R8 is removed a maximal value; Remove a minimum value, ask for the mean value
and the standard deviation
of six remaining data, said standard deviation calculation formulas is following:
，
Remember Xi=Ri-
(i=1-8), and carry out stored record;
C: per 5 minutes of used for electric vehicle power battery pack consistance on-Line Monitor Device detects once, this is detected data carries out storing after the above-mentioned processing, to the result of repeated detection add with, add with the result and represent its inconsistency.
Beneficial effect of the present invention is:
The present invention the present invention proposes a kind of system and method for on-line monitoring of cell of used for electric vehicle power battery pack; Can realize cell being measured to select one mode; Continuous switching through simulation ground; Avoided the input of high common mode, it is measured rapidly and efficiently, the result accurately and reliably.The present invention passes through monomer battery voltage, electric current, and taking all factors into consideration of temperature and cycle index proposed a kind of method for evaluating consistency, realized the digital quantization of consistency of battery pack index.The present invention has avoided the chance that directly contacts with high voltage, has guaranteed the stable personal safety with the testing staff of detection system, is fit to promote the use of.
Other advantages of the present invention, target and characteristic will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention can realize through the structure that is particularly pointed out in following instructions or the accompanying drawing and obtain with other advantages.
Description of drawings
Fig. 1 is that device of the present invention connects synoptic diagram;
Fig. 2 is the sequencing circuit schematic diagram in the voltage detecting circuit of the present invention;
Fig. 3 selects circuit theory diagrams for the battery in the voltage detecting circuit of the present invention.
Embodiment
Pass through specific embodiment below, and combine accompanying drawing, the preferred embodiments of the present invention are carried out detailed description.
As shown in Figure 1; The three-way output signal of single-chip microcomputer U1 is connected to the input end of decoder circuit U5; Decoder circuit U5 comprises that octuple signal output port B1-B8 is connected with the octuple input of sequencing circuit, is output as ground switching signal and detector switch signal two paths of signals behind each road input process sequencing circuit U6.Ten six road signals of sequencing circuit output are connected to the input pin with its circuit U 7 of battery selection one to one; The output pin of U7 is connected with the input end of signal processing circuit U2; The output terminal of signal processing circuit U2 is connected with the A/D converter input end of single-chip microcomputer, and described A/D converter belongs to the inner integrated system of single-chip microcomputer.Current sensor U8 is connected in the electric battery loop, and signal output part is connected with the input end of signal processing circuit U3, and the output terminal of U3 is connected with the A/D converter input end of single-chip microcomputer.Temperature sensor U9 closely pastes with battery surface mutually, and signal output part is connected with the input end of signal processing circuit U4, and the output terminal of signal processing circuit U4 is connected with the A/D converter input end of single-chip microcomputer.
Be illustrated in figure 2 as sequencing circuit; The octuple output B1-B6 of the corresponding one by one decoder circuit U5 of sequencing circuit octuple input; With the B1 road is example, and B1 gets into the detector switch circuit E1 and ground on-off circuit E2 of parallel connection respectively, and B1 road signal gets into the not gate of detector switch circuit E1 simultaneously; Described detector switch circuit E1's or door 2 pins are connected with ground through the electric capacity of series connection, and described ground on-off circuit E2 and 1 pin door are connected with ground through the circuit of connecting.The output signal of the decoder circuit that is connected with sequencing circuit is the form of height-low-Gao; Through the non-low-Gao-low of becoming behind the door; Described detector switch circuit E1's or the door be that negative edge is effective; Described ground on-off circuit E2 with door be that rising edge is effective; Thereby the output signal D1D of low switch circuit E2 will enable early than detector switch circuit E1 output signal D1S, thereby realize the time sequencing control of signal, thus realize battery select in the circuit simulation ground enable enabling early than voltage detection signal.
Shown in accompanying drawing 3; Battery selects circuit to comprise 8 corresponding one by one eight batteries of photoelectric relay, and that photoelectric relay adopts is AQW214, has eight pins; The output terminal of circuit E1 among described photoelectric relay first pin and the sequencing circuit U6 is connected; The output terminal of circuit E2 among the 3rd pin of photoelectric relay and the sequencing circuit U6 is connected, second pin of photoelectric relay and the 4th pin with digitally be connected, the 5th pin is connected with simulation ground; The 8th pin is connected to and its positive pole of cell one to one, and the 6th pin is connected to and its negative pole end of cell one to one; When the pin 1 of photoelectric relay is high level, the pin 7 of photoelectric relay will be communicated with the pin 8 of photoelectric relay, and when the pin 3 of photoelectric relay is high level, the pin 5 of photoelectric relay will be communicated with the pin 6 of photoelectric relay.
What the decoder circuit U5 that the present invention adopts adopted is 3/8 line code translator; The octuple signal low level of output is effective; Non-goalkeeper's low level through in the described sequencing circuit is output as high level signal; Whenever having only one road high level signal to be input to battery selects successively other photoelectric relays to be carried out conducting in the photoelectric relay of circuit.
As the I/O of single chip circuit U1 port A3, A2, when the A1 output state is (000), decoder circuit U5 port B1 output low level, all the other are high level, become high level through B1 behind the select progressively circuit, all the other all become low level; Through select progressively circuit E1 and E2, because the enabling early than the enabling of detector switch circuit E1 of ground on-off circuit E2, thereby GND is with after simulation ground links to each other, and anode just links to each other with the signals collecting end, has guaranteed the correctness of data acquisition.When single-chip processor i/o port A3, A2, A1 output state are (010,011,100,101,110) by that analogy, detect the analog signal voltage value of the 2-6 piece cell of power battery pack successively, input to single-chip microcomputer U1 one by one.
The invention still further relates to the detection of temperature and electric current; At first collect current signal through current sensor circuit U8; Output analog current signal F1 is to signal processing circuit U3, through after the processing such as a series of transport and placing device, light-coupled isolation current signal being input in the single-chip microcomputer.
Used for electric vehicle power battery pack consistance on-line monitoring method may further comprise the steps:
A: voltage, electric current and the temperature of above-mentioned battery testing system collection and record cell, in the electric automobile during traveling process, detected once in per 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T representes the environment temperature of battery.Note R1=V1/I; R2=V2/I; And the like; R8=V8/I; R1-R8 is removed a maximal value; Remove a minimum value, ask for the mean value
and the standard deviation
of six remaining data, said standard deviation calculation formulas is following:
Remember Xi=Ri-
(i=1-8), and carry out stored record;
C: per 5 minutes of used for electric vehicle power battery pack consistance on-Line Monitor Device detects once, this is detected data carries out storing after the above-mentioned processing, to the result of repeated detection add with, add with the result and represent its inconsistency.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Other modifications that those of ordinary skills make technical scheme of the present invention perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. used for electric vehicle power battery pack consistance on-Line Monitor Device, it is characterized in that: described used for electric vehicle power battery pack consistance on-Line Monitor Device comprises single-chip microcomputer, voltage detecting circuit, current detection circuit, temperature sensing circuit and signal processing circuit; Described voltage detecting circuit input end is connected with the I/O port of single-chip microcomputer, and output terminal is connected with signal processing circuit, and signal processing circuit connects single-chip microcomputer, and said current detection circuit, temperature sensing circuit connect single-chip microcomputer through signal processing circuit respectively.
2. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 1; It is characterized in that: described voltage detecting circuit comprises decoder circuit, sequencing circuit and battery selection circuit, and said battery selects circuit to comprise a plurality of photoelectric relays; The I/O port of described single-chip microcomputer is connected with the input end of decoder circuit; The output terminal of decoder circuit is at least two-way; Each road output terminal is through the two paths of signals of the free sequencing of output device behind the sequencing circuit; Described two paths of signals preceding be the ground switching signal, after be the detector switch signal; Ground switching signal, the photoelectric relay that the detector switch signal is corresponding with it respectively connect.
3. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 1 and 2; It is characterized in that: described sequencing circuit is the ground on-off circuit and the detector switch circuit of parallel connection; The ground on-off circuit just is made up of with door and the not gate of connecting a series connection; The detector switch circuit is made up of the positive or gate of a series connection and the not gate of series connection; Ground on-off circuit and detector switch circuit accept to export signal simultaneously, are output as low switch signal and detector switch signal with time order and function order.
4. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 3; It is characterized in that: described current detection circuit is gathered the current value of electric battery major loop through current sensor; Be input in the signal processing circuit; The output of said signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data storage of I/O port input is in the storer of single-chip microcomputer.
5. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 4; It is characterized in that: described temperature sensing circuit is gathered the temperature value of electric battery through temperature sensor; Be input in the signal processing circuit; The output of said signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data storage of I/O port input is in the storer of single-chip microcomputer.
6. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 5 is characterized in that: described decoder circuit adopts 3/8 line decoder chip of standard, and output low level is effective.
7. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 6, it is characterized in that: also comprise power circuit, described power circuit is the power module that carries isolation; Power unit is isolated into analog power part and digital power part; It is anodal that analog power partly has simulation, simulation ground, and it is anodal that digital power partly has numeral; Digitally, simulation ground is connected with the 5th pin of above-mentioned photoelectric relay.
8. a kind of used for electric vehicle power battery pack consistance on-Line Monitor Device according to claim 7 is characterized in that: the quantity of said photoelectric relay is consistent with the quantity of battery cell and corresponding one by one.
9. a kind of used for electric vehicle power battery pack consistance on-line monitoring method according to claim 1 is characterized in that: may further comprise the steps:
A: voltage, electric current and the temperature of above-mentioned battery testing system collection and record cell, in the electric automobile during traveling process, detected once in per 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T representes the environment temperature of battery; Note R1=V1/I; R2=V2/I; And the like; R8=V8/I; R1-R8 is removed a maximal value; Remove a minimum value, ask for the mean value
and the standard deviation
of six remaining data, said standard deviation calculation formulas is following:
，
Remember Xi=Ri-
(i=1-8), and carry out stored record;
C: per 5 minutes of used for electric vehicle power battery pack consistance on-Line Monitor Device detects once, this is detected data carries out storing after the above-mentioned processing, to the result of repeated detection add with, add with the result and represent its inconsistency.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837831A (en) * | 2012-11-30 | 2014-06-04 | 凯迈(洛阳)电子有限公司 | Battery effectiveness analyzing model |
| CN104614675A (en) * | 2014-12-31 | 2015-05-13 | 普天新能源车辆技术有限公司 | Power battery group consistency detection method and device |
| CN109301885A (en) * | 2017-07-24 | 2019-02-01 | 沈阳广合科技有限公司 | Multi-functional two-way V-LOCK battery charger |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451881A (en) * | 1993-12-10 | 1995-09-19 | Curtis Instruments, Inc. | Method and means for adjusting battery monitor based on rate of current drawn from the battery |
| CN101029920A (en) * | 2006-09-07 | 2007-09-05 | 长安大学 | System for inspecting operation parameter of central/distributed electric vehicle battery set |
| CN101256218A (en) * | 2008-04-08 | 2008-09-03 | 吉林大学 | System for measuring charge state of vehicle power battery |
| CN101349713A (en) * | 2007-07-20 | 2009-01-21 | 奇瑞汽车股份有限公司 | Method for detecting battery internal resistance of hybrid power automobile |
| CN101442211A (en) * | 2008-07-08 | 2009-05-27 | 奇瑞汽车股份有限公司 | Monitoring device and monitoring methods for distributed battery management system |
| JP2009156866A (en) * | 2007-12-07 | 2009-07-16 | Ntt Docomo Inc | Cell testing device and cell testing method |
| CN101950001A (en) * | 2010-08-09 | 2011-01-19 | 奇瑞汽车股份有限公司 | Evaluation method of consistency of lithium ion battery pack for electric vehicle |
| CN202075399U (en) * | 2011-05-24 | 2011-12-14 | 奇瑞汽车股份有限公司 | Battery pack voltage simulation device |
| CN202631711U (en) * | 2012-05-11 | 2012-12-26 | 河南速达电动汽车科技有限公司 | Consistency on-line monitoring device for motive power battery pack for electric automobile |
-
2012
- 2012-05-11 CN CN201210145471.2A patent/CN102680902B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451881A (en) * | 1993-12-10 | 1995-09-19 | Curtis Instruments, Inc. | Method and means for adjusting battery monitor based on rate of current drawn from the battery |
| CN101029920A (en) * | 2006-09-07 | 2007-09-05 | 长安大学 | System for inspecting operation parameter of central/distributed electric vehicle battery set |
| CN101349713A (en) * | 2007-07-20 | 2009-01-21 | 奇瑞汽车股份有限公司 | Method for detecting battery internal resistance of hybrid power automobile |
| JP2009156866A (en) * | 2007-12-07 | 2009-07-16 | Ntt Docomo Inc | Cell testing device and cell testing method |
| CN101256218A (en) * | 2008-04-08 | 2008-09-03 | 吉林大学 | System for measuring charge state of vehicle power battery |
| CN101442211A (en) * | 2008-07-08 | 2009-05-27 | 奇瑞汽车股份有限公司 | Monitoring device and monitoring methods for distributed battery management system |
| CN101950001A (en) * | 2010-08-09 | 2011-01-19 | 奇瑞汽车股份有限公司 | Evaluation method of consistency of lithium ion battery pack for electric vehicle |
| CN202075399U (en) * | 2011-05-24 | 2011-12-14 | 奇瑞汽车股份有限公司 | Battery pack voltage simulation device |
| CN202631711U (en) * | 2012-05-11 | 2012-12-26 | 河南速达电动汽车科技有限公司 | Consistency on-line monitoring device for motive power battery pack for electric automobile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837831A (en) * | 2012-11-30 | 2014-06-04 | 凯迈(洛阳)电子有限公司 | Battery effectiveness analyzing model |
| CN104614675A (en) * | 2014-12-31 | 2015-05-13 | 普天新能源车辆技术有限公司 | Power battery group consistency detection method and device |
| CN109301885A (en) * | 2017-07-24 | 2019-02-01 | 沈阳广合科技有限公司 | Multi-functional two-way V-LOCK battery charger |
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| CN102680902B (en) | 2015-05-06 |
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