Power supply using batteries undergoing great voltage variations

Details Power supply using batteries undergoing great voltage variations Power supply using batteries undergoing great voltage variations

1996-04-04

1998-03-31

Elms, Richard T.

Electrical transmission or interconnection systems

Capacitor

Parallel-charge, series-discharge

307 71, 320 7, 320 16, H02J 700

Patent

active

057342059

ABSTRACT:
A power supply using electric double layer capacitors whose output voltages undergo great variations. The power supply further includes first, second, and third switches for switching the capacitors from a parallel connection to a series connection, and a regulating circuit powered by the capacitors. As the output voltages from the capacitors drop, the regulating circuit switches the capacitors from the parallel connection to the series connection. For example, the switches are composed of semiconductor devices. The second and third switches are operated complementarily in relation to the first switch. Electric double layer capacitors producing low terminal voltages can be used. The step-up or step-down ratio can be made smaller. High voltage hazard can be avoided and the efficiency of the power supply can be improved.

REFERENCES:
patent: 3459957 (1969-08-01), Kelley
patent: 3748500 (1973-07-01), Tam
patent: 3871383 (1975-03-01), Lee
patent: 4788452 (1988-11-01), Stanley
patent: 5121046 (1992-06-01), McCullough
patent: 5498951 (1996-03-01), Okamura et al.
patent: 5532572 (1996-07-01), Okamura
"A Basic Study on Power Storage Capacitor Systems", Michio Okamura, Trans. IEEE of JAPAN, vol. 115-B, No. 5, May, 1995, pp. 504-510. English language translation found at Electrical Engineering in Japan, vol. 116, No. 3, 1996, pp. 40-51.

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