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Methods and apparatus for protecting battery cells from overcharge

  • US 5,703,463 A
  • Filed: 02/18/1997
  • Issued: 12/30/1997
  • Est. Priority Date: 02/18/1997
  • Status: Expired due to Term
First Claim
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1. A method of protecting at least one rechargeable battery cell from overcharge, comprising the steps of:

  • monitoring a potential across the at least one rechargeable battery cell, and if the potential exceeds a predetermined value for at least a predetermined period, decoupling the at least one rechargeable battery cell from one of a plurality of output nodes, one output node coupled to a first polarity terminal of the rechargeable battery cell and another output node coupled to a second polarity terminal of the rechargeable battery cell; and

    monitoring the potential across the at least one rechargeable battery cell, and if the potential continues to exceed the predetermined value, further decoupling the at least one rechargeable battery cell from one of the plurality of output nodes.

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