Charging system for charging capacitors of a capacitor bank

Details Charging system for charging capacitors of a capacitor bank Charging system for charging capacitors of a capacitor bank

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.

REFERENCES:
patent: 4061955 (1977-12-01), Thomas et al.
patent: 4238721 (1980-12-01), DeLuca et al.
patent: 5578914 (1996-11-01), Morita
patent: 5675233 (1997-10-01), Kaneko et al.
patent: 5677613 (1997-10-01), Perelle
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.

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