Apparatus and method for charging and testing batteries

Details Apparatus and method for charging and testing batteries Apparatus and method for charging and testing batteries

1988-06-27

1989-10-24

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 21, 320 22, H02J 704

Patent

active

048764957

ABSTRACT:
This invention relates to a method for charging a rechargeable battery especially lead-acid batteries. In this method, the open circuit voltage of the battery is measured and the minimum number of cells is estimated from this value. The battery is then charged at any charge rate and at a constant current until the battery voltage is substantially equal to the estimated number of cells multiplied by a voltage which is characteristic of the battery, and thereafter the battery is charged at any charge rate and at the aforesaid battery voltage until the current decreases to some predetermined value. The foregoing steps are repeated alternatively until a constant or substantially constant value for the estimate number of cells is obtained. Thereafter, the battery is charged at a voltage equal to the number of cells multiplied by the characteristic voltage of the battery until the current reaches a predetermined value and then the battery is charged at some predetermined current for a predetermined period of time.

REFERENCES:
patent: 4745349 (1988-05-01), Palanisamy et al.

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