WO1998045924A3 - Battery protection system - Google Patents

Battery protection system Download PDF

Info

Publication number
WO1998045924A3
WO1998045924A3 PCT/US1998/005968 US9805968W WO9845924A3 WO 1998045924 A3 WO1998045924 A3 WO 1998045924A3 US 9805968 W US9805968 W US 9805968W WO 9845924 A3 WO9845924 A3 WO 9845924A3
Authority
WO
WIPO (PCT)
Prior art keywords
charging
battery
switches
battery pack
current
Prior art date
Application number
PCT/US1998/005968
Other languages
French (fr)
Other versions
WO1998045924A2 (en
Inventor
Jade Alberkrack
Troy L Stockstad
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority to EP98913152A priority Critical patent/EP0972327B1/en
Priority to JP54281498A priority patent/JP3937358B2/en
Priority to DE69839115T priority patent/DE69839115T2/en
Publication of WO1998045924A2 publication Critical patent/WO1998045924A2/en
Publication of WO1998045924A3 publication Critical patent/WO1998045924A3/en
Priority to HK00102933A priority patent/HK1023857A1/en

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
    • 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
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process

Abstract

A battery protection system (20) controls a process for charging a battery pack (15). A hysteresis comparator (54) senses a charging current flowing through the battery pack (15) and switches off a charging switch (31) to interrupt the charging current when the charging current reaches an upper limit. A transient current is then generated by an inductor (34). The hysteresis comparator (54) senses the transient current flowing through the battery pack (15) and switches on the charging switch (31) to regenerate the charging current when the transient current decreases substantially to zero. Periodically, a battery monitoring circuit (40) switches off the charging switch (31) and measures an open circuit voltage across each battery cell in the battery pack (15). In response to the open circuit voltage of a battery cell reaching a fully charged voltage, the battery monitoring circuit (40) switches off the charging switch (31) to terminate the charging process.
PCT/US1998/005968 1997-04-07 1998-03-26 Battery protection system WO1998045924A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98913152A EP0972327B1 (en) 1997-04-07 1998-03-26 Battery protection system
JP54281498A JP3937358B2 (en) 1997-04-07 1998-03-26 Battery system, battery protection system, and battery charging method
DE69839115T DE69839115T2 (en) 1997-04-07 1998-03-26 BATTERY PROTECTION SYSTEM
HK00102933A HK1023857A1 (en) 1997-04-07 2000-05-17 Battery protection system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/833,437 1997-04-07
US08/833,437 US5804944A (en) 1997-04-07 1997-04-07 Battery protection system and process for charging a battery

Publications (2)

Publication Number Publication Date
WO1998045924A2 WO1998045924A2 (en) 1998-10-15
WO1998045924A3 true WO1998045924A3 (en) 1998-12-23

Family

ID=25264420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/005968 WO1998045924A2 (en) 1997-04-07 1998-03-26 Battery protection system

Country Status (9)

Country Link
US (2) US5804944A (en)
EP (1) EP0972327B1 (en)
JP (1) JP3937358B2 (en)
KR (1) KR20010006107A (en)
CN (1) CN1107367C (en)
DE (1) DE69839115T2 (en)
HK (1) HK1023857A1 (en)
TW (1) TW367629B (en)
WO (1) WO1998045924A2 (en)

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Also Published As

Publication number Publication date
DE69839115D1 (en) 2008-03-27
DE69839115T2 (en) 2009-02-05
US5804944A (en) 1998-09-08
EP0972327A2 (en) 2000-01-19
CN1107367C (en) 2003-04-30
KR20010006107A (en) 2001-01-26
EP0972327B1 (en) 2008-02-13
TW367629B (en) 1999-08-21
US5920181A (en) 1999-07-06
CN1251694A (en) 2000-04-26
JP2001524300A (en) 2001-11-27
JP3937358B2 (en) 2007-06-27
WO1998045924A2 (en) 1998-10-15
HK1023857A1 (en) 2000-09-22

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