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Charge and discharge control circuit having low voltage detecting means for preventing charging of an abnormal cell

  • US 5,959,436 A
  • Filed: 02/03/1998
  • Issued: 09/28/1999
  • Est. Priority Date: 02/04/1997
  • Status: Expired due to Term
First Claim
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1. A charge and discharge control circuit comprising:

  • circuitry for monitoring whether the voltage of at least one secondary cell is above or below the threshold voltage of a MOS transistor and outputting a signal depending upon the monitored voltage for controlling the charging of the at least one secondary cell based upon the signal.

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