Power supply circuit for an automobile

Details Power supply circuit for an automobile Power supply circuit for an automobile

1990-09-11

1993-03-02

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

307 101, H02J 900

Patent

active

051915006

ABSTRACT:
A power supply circuit for an automobile including an electric automotive appliance having a memory, a main battery, a backup battery, an ignition key switch, a battery switching circuit for connecting one of the main and backup batteries to the electric automotive appliance, a power detector for detecting a charged power in the backup battery, a limiting circuit for limiting the operation of the electric automobile appliance to only a power backup of the memory, and a control circuit for activating the limiting circuit when a charged power in the backup battery is detected to be below a predetermined level.

REFERENCES:
patent: 4005344 (1975-06-01), Gaind et al.
patent: 4010381 (1975-04-01), Fickenscher
patent: 4237385 (1978-11-01), Jurgens et al.

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