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Checking method of connection between secondary battery and battery charger and checking device

  • US 5,751,136 A
  • Filed: 11/05/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 12/26/1994
  • Status: Expired due to Fees
First Claim
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1. A method for checking connection between a secondary battery and a battery charger for charging the secondary battery, said connection being made by a disconnectable connector, said battery charger comprises charging means for supplying electric current to said secondary battery through said connector, charge-control means for controlling said charging means, and a direct current power supply;

  • said secondary battery comprises a temperature sensing element for sensing temperature of said secondary battery, said temperature sensing element having terminals, one of which is connected to said direct current power supply of said battery charger via said connector when said connection is secured, so that said temperature sensing element normally outputs a voltage according to said temperature of said secondary battery within a predetermined range;

    said method comprising connecting said charge-control means to one of said terminals sensing element when said connection is secured, comparing the output voltage with a preset voltage outside of only one end limit of a standard range of the voltage of the temperature sensing element and deciding that said connection is not secured when the voltage input to said charge-control means is beyond that one end limit.

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