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NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY CHARGING METHOD, ELECTRONIC DEVICE, BATTERY PACK, AND CHARGING DEVICE

  • US 20100072951A1
  • Filed: 12/11/2007
  • Published: 03/25/2010
  • Est. Priority Date: 12/26/2006
  • Status: Active Grant
First Claim
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1. A charging method for charging a non-aqueous electrolyte secondary battery including a heat-resistant layer between a negative electrode and a positive electrode, comprising:

  • a pulse charging step of performing pulse charge by applying a pulse to a secondary battery;

    a polarization detecting step of detecting a change amount of a cell voltage associated with a change in the concentration polarization of a non-aqueous electrolyte as a polarization voltage after the cell voltage is changed due to a voltage drop caused by an internal resistance of the secondary battery when a charge current flowing in the secondary battery changes as an applied state of the pulse changes; and

    a deterioration detecting step of terminating the pulse charge if the polarization voltage detected in the polarization detecting step increases to or above a predetermined first threshold value.

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