Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – Having variable number of cells or batteries in series
Patent
1997-12-05
1999-10-19
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
Having variable number of cells or batteries in series
320166, H01M 1046
Patent
active
059695056
ABSTRACT:
There is disclosed an apparatus for efficiently charging a capacitor bank consisting of capacitors connected in series. The apparatus needs parallel monitors of a small maximum rating though the capacitors are charged quickly with a large charging current from a charger. The monitors bypass the charging current at voltages exceeding a preset voltage. The state of charge of the bank is detected. If certain conditions are satisfied (e.g., the terminal voltage of the bank exceeds a preset value, at least one of the monitors is turned on, or the terminal voltage of at least one of the capacitors exceeds a preset value), a charging control circuit reduces the charging current. This current is gradually reduced. Immediately before the bank is fully charged, the charging current is reduced greatly or in a stepwise fashion.
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Denshi Gijyutsu, 1994, 12, pp. 1-3 (Electronic Engineering, vol. 36, No. 12, 1994).
"A Basic Study on Power Storage Capacitor Systems", Michio Okamura, Denki Gakkai Ronbunshi, vol. 155-B, No. 5, May 1995, pp. 504-510.
Jeol Ltd.
Tso Edward H.
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