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Battery protection device, battery protection system using the same, and battery protection method

  • US 7,397,221 B2
  • Filed: 01/28/2005
  • Issued: 07/08/2008
  • Est. Priority Date: 04/28/2004
  • Status: Active Grant
First Claim
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1. A battery protection device for protecting a battery from an abnormal state, the battery protection device comprising:

  • a detector that detects an abnormal state of the battery and outputs an abnormality detection signal when the abnormal state is detected;

    an input terminal to which a first current signal is input from a first external device;

    a voltage converter that converts the first current signal input to the input terminal to a voltage signal;

    a combiner that combines the abnormality detection signal detected by the detector with the voltage signal output by the voltage converter and outputs a combined signal;

    a current converter that converts the combined signal to a second current signal; and

    an output terminal that outputs the second current signal to a second external device.

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