Electricity: battery or capacitor charging or discharging – Cell or battery charger structure – For diverse sizes of cells – batteries – or battery packs
Patent
1999-06-08
2000-09-26
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
For diverse sizes of cells, batteries, or battery packs
320150, 320160, H01M 1046
Patent
active
061246980
ABSTRACT:
A battery charger determines the completion of battery charge based on a battery temperature and a temperature rise value. In determination, if the battery temperature and the battery rise temperature belong to a region in the map, which tends to occur at the beginning of a final charging period (`In` in a step S334), a low count value "1" is added to a counter (in a step S336). If they belong to a region which tends to occur at the end of the final charging period (`In` in a step S340), a high count value "3" is added to the counter (in a step S340). If the sum of the count values exceeds a set value, completion of battery charge is determined (`High` in a step S348). That is, if temperature rise is large and the temperature rise remains large even with the charging current value being lowered, then a high count value is added to the counter. If temperature rise is large but the temperature rise does not increase very much with the charging current value being lowered, then a low count value is added to the counter. Thus, the battery can be charged to a target capacity without influences of the battery residual capacity, temperature and the like.
REFERENCES:
patent: 5352968 (1994-10-01), Remi et al.
patent: 5363031 (1994-11-01), Miller et al.
patent: 5691078 (1997-11-01), Kozaki et al.
patent: 5874825 (1999-02-01), Brotto
Makita Corporation
Tolpin Thomas W.
Tso Edward H.
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