GB1507148A - Battery charging control circuits - Google Patents

Battery charging control circuits

Info

Publication number
GB1507148A
GB1507148A GB41820/74A GB4182074A GB1507148A GB 1507148 A GB1507148 A GB 1507148A GB 41820/74 A GB41820/74 A GB 41820/74A GB 4182074 A GB4182074 A GB 4182074A GB 1507148 A GB1507148 A GB 1507148A
Authority
GB
United Kingdom
Prior art keywords
battery
measurement
charging
slope
minimum
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.)
Expired
Application number
GB41820/74A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
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
Priority to US05/515,200 priority Critical patent/US3936718A/en
Priority to ZA00755701A priority patent/ZA755701B/en
Priority to NL7510825A priority patent/NL7510825A/en
Application filed by Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB41820/74A priority patent/GB1507148A/en
Priority to DE19752542487 priority patent/DE2542487A1/en
Priority to IT6938975A priority patent/IT1048214B/en
Priority to SE7510743A priority patent/SE7510743L/en
Priority to FR7529349A priority patent/FR2286532A2/en
Priority to JP50115707A priority patent/JPS5160941A/ja
Priority to BE160459A priority patent/BE833915R/en
Publication of GB1507148A publication Critical patent/GB1507148A/en
Priority to JP10561779A priority patent/JPS5541191A/en
Expired 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient

Landscapes

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

Abstract

1507148 Control circuits for battery chargers WESTINGHOUSE BRAKE & SIGNAL CO Ltd 16 Sept 1975 [26 Sept 1974] 41820/74 Addition to 1438290 Heading H2H A battery charging control circuit similar to that described in Specification 1,438,290 includes a circuit, Fig. 5a, which detects the gassing point during charging of the battery, the detection of this point causing the control circuit to reduce the charging current. A graph of the increase in cell voltage per minute of charging time against the total charging time shows two maxima between which there is a minimum (X), Fig. 8 (not shown), corresponding to the gassing point. The circuit of Fig. 5a detects this minimum rate of voltage increase and includes two voltage signal stores 1, 2 and two comparators A, B. To detect the minimum value it is necessary initially to detect a negative slope in the graph and each measurement of the rate of change of the battery voltage necessitates the measurement and comparison of the volts/cell of the battery in three successive charge current interruptions, the measurements being initiated by sampling command signals. The first measurement VS2 is stored in the store 2, and the second measurement VS1 is stored in the store 1. The comparator A compares the measurement VS2 with VS1 whilst the comparator B compares the third measurement Vc with VS 1 and the outputs of these comparators are fed to a third comparator or slope detector. The slope detector is connected to a negative slope memory which remains in its initial state until a negative slope is detected. Whilst the memory is in its initial state, a charge state detector holds the charging of the battery in the BULK or constant current charge phase. When the negative slope is detected, the charge state detector is able to change state upon the detection of a positive slope, thereby detecting the minimum point of the graph or the gassing point of the battery. At this instant the control circuit reduces the charging current to start the TAPER charge phase.
GB41820/74A 1973-09-24 1975-09-16 Battery charging control circuits Expired GB1507148A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US05/515,200 US3936718A (en) 1973-09-24 1974-10-16 Battery charging control circuits
ZA00755701A ZA755701B (en) 1975-09-16 1975-09-05 Battery charging control circuits
NL7510825A NL7510825A (en) 1975-09-16 1975-09-15 BATTERY CHARGE CHAIN.
GB41820/74A GB1507148A (en) 1975-09-16 1975-09-16 Battery charging control circuits
DE19752542487 DE2542487A1 (en) 1975-09-16 1975-09-24 CONTROL CIRCUIT FOR BATTERY CHARGER
IT6938975A IT1048214B (en) 1975-09-16 1975-09-25 Battery-charging control which interrupts charging for sampling - uses differences between successive voltages to indicate gassing
SE7510743A SE7510743L (en) 1975-09-16 1975-09-25 CIRCUIT FOR REGULATION OF CHARGING A BATTERY
FR7529349A FR2286532A2 (en) 1975-09-16 1975-09-25 CHARGING CONTROL CIRCUIT FOR BATTERY CHARGER
JP50115707A JPS5160941A (en) 1975-09-16 1975-09-26
BE160459A BE833915R (en) 1975-09-16 1975-09-26 CHARGING CONTROL CIRCUIT FOR BATTERY CHARGER
JP10561779A JPS5541191A (en) 1975-09-16 1979-08-21 Battery charger control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41820/74A GB1507148A (en) 1975-09-16 1975-09-16 Battery charging control circuits

Publications (1)

Publication Number Publication Date
GB1507148A true GB1507148A (en) 1978-04-12

Family

ID=10421507

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41820/74A Expired GB1507148A (en) 1973-09-24 1975-09-16 Battery charging control circuits

Country Status (9)

Country Link
JP (2) JPS5160941A (en)
BE (1) BE833915R (en)
DE (1) DE2542487A1 (en)
FR (1) FR2286532A2 (en)
GB (1) GB1507148A (en)
IT (1) IT1048214B (en)
NL (1) NL7510825A (en)
SE (1) SE7510743L (en)
ZA (1) ZA755701B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902522A2 (en) * 1997-09-12 1999-03-17 Fuji Photo Film Co., Ltd. Charge control method and charger for a rechargeable battery

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1153061A (en) * 1978-05-31 1983-08-30 David A. Saar Method of charging batteries and apparatus therefor
CA1330828C (en) * 1987-10-09 1994-07-19 Jiri K. Nor Battery charger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700997A (en) * 1971-02-24 1972-10-24 Mcculloch Corp Rapid charging of batteries
GB1453860A (en) * 1973-05-17 1976-10-27 Macharg J A Control systems for battery chargers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902522A2 (en) * 1997-09-12 1999-03-17 Fuji Photo Film Co., Ltd. Charge control method and charger for a rechargeable battery
EP0902522B1 (en) * 1997-09-12 2006-11-15 Ube Industries, Ltd. Charge control method and charger for a rechargeable battery

Also Published As

Publication number Publication date
ZA755701B (en) 1976-08-25
NL7510825A (en) 1976-03-30
BE833915R (en) 1976-01-16
SE7510743L (en) 1976-03-29
IT1048214B (en) 1980-11-20
FR2286532A2 (en) 1976-04-23
JPS5541191A (en) 1980-03-22
DE2542487A1 (en) 1976-04-08
JPS5160941A (en) 1976-05-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee