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Method for testing precursor of secondary cell, its testing instrument, and method for manufacturing secondary cell using the method

  • US 20050242820A1
  • Filed: 08/14/2003
  • Published: 11/03/2005
  • Est. Priority Date: 08/29/2002
  • Status: Active Grant
First Claim
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1. A method for inspecting a secondary battery precursor including a pair of electrodes and a separator disposed between the pair of electrodes, comprising:

  • applying a constant inspection voltage between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a current flowing due to application of the inspection voltage; and

    determining the precursor to be defective if a current value exceeding a previously set reference current value is detected within a time period corresponding to a time period between starting of voltage application when a voltage is applied to a normal secondary battery precursor and obtaining of a constant current.

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