GB1432567A - Electrical monitoring apparatus for battery charging systems - Google Patents

Electrical monitoring apparatus for battery charging systems

Info

Publication number
GB1432567A
GB1432567A GB1921172A GB1921172A GB1432567A GB 1432567 A GB1432567 A GB 1432567A GB 1921172 A GB1921172 A GB 1921172A GB 1921172 A GB1921172 A GB 1921172A GB 1432567 A GB1432567 A GB 1432567A
Authority
GB
United Kingdom
Prior art keywords
battery
alarm
main battery
charging current
circuit
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
GB1921172A
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.)
NV Tools Ltd
Original Assignee
NV Tools 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
Application filed by NV Tools Ltd filed Critical NV Tools Ltd
Priority to GB1921172A priority Critical patent/GB1432567A/en
Publication of GB1432567A publication Critical patent/GB1432567A/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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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

Abstract

1432567 Battery charging systems NV TOOLS Ltd 12 July 1973 [25 April 1972] 19211/72 Heading H2H A circuit for monitoring the charging current supplied to a main battery (not shown) comprises an internal battery 24 and an alarm 25 which is intermittently energized by the internal battery in the event of a mains supply failure, no output from the main battery charger or disconnection of the main battery. The internal battery which consists of six nickel cadmium cells is charged from a power supply 22 via a constant current transistor circuit 23. The charging current supplied to the main battery flows through a diode 26 and switches on transistors in a detector circuit 21 thereby energizing a relay coil 30 and disconnecting multivibrators 28, 29 from the battery 24. A driver circuit 27 therefore does not operate the alarm but in the event of failure of the main battery charging current the battery 24 is connected to the multivibrators, the higher frequency one of which, 28, supplies three mark pulses to the driver circuit during each space of the multivibrator 29 to sound the alarm. A link 31 enables testing of the alarm.
GB1921172A 1972-04-25 1972-04-25 Electrical monitoring apparatus for battery charging systems Expired GB1432567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1921172A GB1432567A (en) 1972-04-25 1972-04-25 Electrical monitoring apparatus for battery charging systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1921172A GB1432567A (en) 1972-04-25 1972-04-25 Electrical monitoring apparatus for battery charging systems

Publications (1)

Publication Number Publication Date
GB1432567A true GB1432567A (en) 1976-04-22

Family

ID=10125579

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1921172A Expired GB1432567A (en) 1972-04-25 1972-04-25 Electrical monitoring apparatus for battery charging systems

Country Status (1)

Country Link
GB (1) GB1432567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441066A (en) * 1982-09-28 1984-04-03 Mcgraw-Edison Company Battery charger failure alarm circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441066A (en) * 1982-09-28 1984-04-03 Mcgraw-Edison Company Battery charger failure alarm circuit

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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