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Abnormality determination device of power supply and abnormality determination method thereof

  • US 7,821,234 B2
  • Filed: 02/06/2007
  • Issued: 10/26/2010
  • Est. Priority Date: 02/27/2006
  • Status: Active Grant
First Claim
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1. An abnormality determination device of a power supply having a battery that supplies electric power to an electric load, a current sensor that detects a current of the battery, and a voltage sensor that detects a voltage of the battery, the device comprising:

  • determination means for determining that an open failure has occurred in the battery when the voltage detected by the voltage sensor is larger than a first predetermined change amount and the current detected by the current sensor is smaller than a second predetermined change amount, and for determining that an intermediate fixed failure has occurred in the current sensor when the voltage detected by the voltage sensor is less than or equal to the first change amount and the current detected by the current sensor is smaller than the second change amount.

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