Automotive battery circuit fault detection
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United States of America Patent
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Apr 7, 2015
Grant Date -
May 20, 2010
app pub date -
Nov 14, 2008
filing date -
Nov 14, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A vehicle having an electrical system including an electric power generator arranged to selectively provide electric power to an electrical load of the vehicle and to selectively charge a battery of the vehicle. A fault detection system is provided for detecting an open circuit or high resistance fault in a ground circuit. The fault detection system includes a controller that controls a voltage output of the generator so as to either restrict or suspend charging or increase or start charging of the battery by the generator for a designated test period. A determining means determines a current discharge from or charging current into the battery during the test period, wherein if the determined current discharge or charging current is less than a given threshold, then an open circuit or high resistance fault is deemed to be detected in the ground circuit.
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