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Battery charger for an electrically-driven vehicle and method of confirming earth leakage applicable thereto

  • US 8,941,957 B2
  • Filed: 06/09/2011
  • Issued: 01/27/2015
  • Est. Priority Date: 07/30/2010
  • Status: Active Grant
First Claim
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1. A battery charger for charging an electrically-driven vehicle by connecting the electrically-driven vehicle with an external power source, the battery charger comprising:

  • an earth leakage detector operable to detect earth leakage of the battery charger;

    an earth leakage circuit breaker operable to switch energization from the external power source;

    an earth leakage confirmation relay capable of forcibly causing earth leakage in a downstream circuit of the earth leakage detector;

    a resistor unit connected in series with the earth leakage confirmation relay and capable of being set to any one of a plurality of leakage current values; and

    a controller operable to switch the earth leakage circuit breaker based on a detection result of the earth leakage detector while forcibly causing earth leakage in the downstream circuit.

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