Control and termination of a battery charging process

Details Control and termination of a battery charging process Control and termination of a battery charging process

1996-07-10

1997-12-02

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 23, 320 4, 320 14, H01M 1044

Patent

active

056940238

ABSTRACT:
A method and an apparatus for adjusting the process of charging a battery so as to charge the battery as rapidly as possible while avoiding overheating of or damage to the battery. The method provides for applying a charging pulse (C1) which provides an average charging current, applying a first depolarizing pulse (D1), waiting for a first rest period (DW1), measuring the voltage (V1) at a predetermined point within the first rest period, applying a second depolarizing pulse (D2), waiting for a second rest period (DW2), measuring the voltage (V2) at the predetermined point within the second rest period, determining a difference between the voltage (V1) and the voltage (V2), and decreasing the average charging current if the difference is greater than a predetermined amount. The present invention also provides for determining whether the battery is low on water.

REFERENCES:
patent: 3597673 (1971-08-01), Burkett et al.
patent: 3617851 (1971-11-01), Du Puy et al.
patent: 4745349 (1988-05-01), Palanisamy et al.
patent: 4829225 (1989-05-01), Podrazhansky et al.
patent: 5307000 (1994-04-01), Podrazhansky et al.
patent: 5543701 (1996-08-01), Leung et al.
patent: 5561360 (1996-10-01), Ayres et al.

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