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Rechargeable battery pack

DC
  • US 7,956,581 B2
  • Filed: 01/10/2008
  • Issued: 06/07/2011
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. A rechargeable battery pack, comprising:

  • a power cell;

    a protection circuit module, said protection circuit module including a control circuit operatively coupled to an electronic switching device, said power cell and said electronic switching device being in an electrical connection in which substantially all of the current passing through said power cell passes through said electronic switching device, wherein when one or both of an overvoltage and overcurrent condition exists, said control circuit controls said electronic switching device to cause said electronic switching device to assume a non-conducting condition; and

    a thermal protection circuit operatively coupled to said electronic switching device and said power cell, said thermal protection circuit receiving a negligible current from said power cell, wherein in response to a temperature within said rechargeable battery pack exceeding a threshold value, said thermal protection circuit controls said electronic switching device to assume a non-conducting condition.

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