Battery charging operation and a detection of a fully charged co

Details Battery charging operation and a detection of a fully charged co Battery charging operation and a detection of a fully charged co

1998-06-29

1999-12-07

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320130, H02J 700

Patent

active

05998970&

ABSTRACT:
A microcomputer performs a total of 100 sampling actions during a 1 sec sampling period for obtaining a plurality of battery voltage data V. In each sampling period, a minimum value .upsilon.min and a maximum value .upsilon.max are stored in a RAM 53. A peak value VMAX, used for detecting a peak battery voltage in the charging operation, is renewed by a largest data among the sampled minimum values .upsilon.min. A differenc .DELTA.V between the peak value VMAX and the maximum value .upsilon.max is calculated the end of each sampling period. And, when the calculated difference .DELTA.V exceeds a predetermined value, a judgement is made that the battery is fully charged.

REFERENCES:
patent: 4998057 (1991-03-01), Shinohara et al.
patent: 5185565 (1993-02-01), Uchida
patent: 5621302 (1997-04-01), Shinohara

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