Battery-charging circuit

Details Battery-charging circuit Battery-charging circuit

1993-06-08

1995-09-19

Regan, Maura K.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

320 48, G01N 274.6

Patent

active

054518806

ABSTRACT:
A battery-charging circuit capable of promptly detecting, during quick charging, an abnormality of a secondary battery of a battery, if any, and making it impossible to continue the quick charge thereafter. As a battery-charging circuit for quickly charging a secondary battery with a predetermined charging current from a battery-charging power source having a constant-characteristic, the battery charging circuit includes a voltage-measuring device for measuring the secondary battery voltage at predetermined regular time intervals; a voltage-setting device for presetting a reference voltage value at a level higher, by a predetermined magnitude, than an expected charge complete voltage value; a comparator device for comparing with the preset reference voltage value a battery voltage actually measured during the quick charge operation; and a current limiter circuit for stopping the quick charge when the battery voltage has risen to the reference voltage value.

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patent: 3880072 (1974-07-01), Charbonnier et al.
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patent: 4361809 (1982-11-01), Bil et al.
patent: 4670703 (1987-06-01), Williams
patent: 4727306 (1988-02-01), Misak et al.
patent: 4888544 (1989-12-01), Terry et al.

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