Power supply voltage change-over apparatus for a vehicle

Details Power supply voltage change-over apparatus for a vehicle Power supply voltage change-over apparatus for a vehicle

1993-05-24

1995-05-23

Dougherty, Thomas M.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

320 6, 307 66, 307 71, H02J 700

Patent

active

054184029

ABSTRACT:
A power supply voltage change-over apparatus for a vehicle has a parallel/series connection change-over relay 4 which connects two batteries 1a, 1b in parallel when an ordinary load is used or the batteries are charged, and which connects the batteries in series when a large power electric load is actuated opening and closing state of each contact 5a, 5b or 5c of the relay 4 is detected by a terminal voltage Ea or Eb of a switch 7 for actuating the large power electric load, and the detected voltage is inputted to a controller 8. The controller distinguishes the failure of a normally open contact 5a, 5b or 5c, and prohibits further operations of the apparatus, whereby short-circuiting of the batteries can be prevented.

REFERENCES:
patent: 4375593 (1983-03-01), Winterbotham
patent: 4694237 (1987-09-01), Hanson
patent: 5121046 (1992-06-01), McCullough
patent: 5162720 (1992-11-01), Lambert
patent: 5200688 (1993-04-01), Patino et al.

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