CA2157823A1 - Charge Equalization of Series Connected Cells or Batteries - Google Patents

Charge Equalization of Series Connected Cells or Batteries

Info

Publication number
CA2157823A1
CA2157823A1 CA2157823A CA2157823A CA2157823A1 CA 2157823 A1 CA2157823 A1 CA 2157823A1 CA 2157823 A CA2157823 A CA 2157823A CA 2157823 A CA2157823 A CA 2157823A CA 2157823 A1 CA2157823 A1 CA 2157823A1
Authority
CA
Canada
Prior art keywords
cells
windings
cell
equalizer
batteries
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2157823A
Other languages
French (fr)
Other versions
CA2157823C (en
Inventor
David T. Fouchard
Walter B. Ebner
David R. Pacholok
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spectrum Brands Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2157823A1 publication Critical patent/CA2157823A1/en
Application granted granted Critical
Publication of CA2157823C publication Critical patent/CA2157823C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

An equalizer for equalizing the charge on several series-connected cells includes a transformer having plural windings on a core corresponding to the number of cells.
The windings are tightly coupled to one another. A
switching device such as a MOSFET is connected to each of the windings, and a winding and a switching device are connected across each of the cells. The switching devices are simultaneously switched at a relatively high frequency, e.g., 20Hz, and the voltage across the highest charged cell appears across each of the windings when the switching devices are on. Current flows from the most highly charged cell to a cell or to cells of lower charge, with the charging current being proportional to the difference in voltage between the highest charged cell and each of the lesser charged cells. Equalization is carried out with very little power consumption by the equalizer, allowing charging to take place in a rapid manner.
CA002157823A 1994-09-09 1995-09-08 Charge equalization of series connected cells or batteries Expired - Fee Related CA2157823C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/303,703 US5594320A (en) 1994-09-09 1994-09-09 Charge equalization of series connected cells or batteries
US303,703 1994-09-09

Publications (2)

Publication Number Publication Date
CA2157823A1 true CA2157823A1 (en) 1996-03-10
CA2157823C CA2157823C (en) 1999-05-25

Family

ID=23173311

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002157823A Expired - Fee Related CA2157823C (en) 1994-09-09 1995-09-08 Charge equalization of series connected cells or batteries

Country Status (5)

Country Link
US (1) US5594320A (en)
CA (1) CA2157823C (en)
DE (1) DE19533543A1 (en)
FR (1) FR2724502B1 (en)
GB (1) GB2293060A (en)

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Also Published As

Publication number Publication date
CA2157823C (en) 1999-05-25
GB2293060A (en) 1996-03-13
FR2724502B1 (en) 1997-01-03
FR2724502A1 (en) 1996-03-15
DE19533543A1 (en) 1996-03-14
GB9518334D0 (en) 1995-11-08
US5594320A (en) 1997-01-14

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