Battery backup circuit

Details Battery backup circuit Battery backup circuit

1985-07-12

1987-06-02

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 65, 307 43, H02J 900

Patent

active

046706615

ABSTRACT:
A battery backup circuit including n pieces of PC boards which are to be supplied with electric power from a main power source, switches to be turned on or off in response to the voltage of the main power source, a main backup battery for supplying each PC board with backup power when the main power source is cut off by the switch, and a backup battery having smaller capacity than the main backup battery provided on each of the PC boards and put in connection with the main backup battery with runaround preventing diodes interposed therebetween, so that each PC board may be independently supplied with backup power and provided with the even rate of electric power consumption, and that the battery backup circuit may be manufactured at low cost.

REFERENCES:
patent: 3293444 (1966-12-01), Hagopian
patent: 3609386 (1971-09-01), Patcachi
patent: 3808452 (1974-04-01), Hutchinson
patent: 3916212 (1975-10-01), Prochazka et al.
patent: 4272650 (1981-06-01), Bolgiano et al.
patent: 4441031 (1984-04-01), Moriya et al.

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