Method and system for testing and sorting batteries

  • US 4,363,407 A
  • Filed: 01/22/1981
  • Issued: 12/14/1982
  • Est. Priority Date: 01/22/1981
  • Status: Expired due to Fees
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First Claim
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1. The method of testing and sorting a production run of electric batteries prior to assembly and packaging thereof with related goods to be merchandised with individual batteries of such a production run, said method comprising the steps of:

  • (a) testing each individual battery of the production run to obtain a first value of electrical energy for each such battery;

    (b) forming machine readable indicia on each such battery corresponding to said first value;

    (c) storing the batteries after completion of steps (a) and (b);

    (d) retesting each of the individual batteries after passage of an elapsed period of time following step (a) to obtain a second value of electrical energy for each battery;

    (e) machine reading said indicia and computing, in accordance with said elapsed period of time of each battery, the rate of decay of electrical energy for each individual battery as a function of the difference between said first and second values per unit time; and

    (f) sorting said batteries in accordance with said computed rate of decay to separate those individual batteries of the production run having a rate of stored energy decay extending an acceptable value from those batteries of the same production run having a rate of stored energy decay equal to or lower than said acceptable value.

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