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Method and apparatus for diagnosing the condition of a rechargeable battery

  • US 7,227,335 B2
  • Filed: 07/08/2004
  • Issued: 06/05/2007
  • Est. Priority Date: 07/22/2003
  • Status: Active Grant
First Claim
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1. A battery diagnosing device for determining whether a rechargeable battery has degraded normally or abnormally, comprising:

  • a device for determining a usage quantity that indicates how much the rechargeable battery has been used,a device for measuring a degradation indicator that changes in accordance with progress of the degradation of the rechargeable battery, wherein the degradation indicator is measured independently from the usage quantity, anda device for comparing a reference usage quantity with the determined usage quantity when the measured degradation indicator has exceeded a reference degradation value, wherein the reference usage quantity indicates how much the rechargeable battery can be used normally until the degradation indicator exceeds the reference degradation value.

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