Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Patent
1997-07-25
1998-11-24
Do, Diep N.
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
324104, 320DIG18, 359273, 429 93, 116216, 374162, G01N 27416, H01M 1048
Patent
active
058412859
ABSTRACT:
The battery tester of the present invention includes a heating element coupled to opposite terminals of a battery for generating heat in response to current supplied from the battery, and an indicator provided in proximity to the heating element. The indicator has a visual property that changes in response to the heat generated by the heating element. According to the present invention, at least a portion of the heating element is made of a variable resistivity material having a resistivity that changes in response to ambient temperature. By using a variable resistivity material that has a resistivity that increases as ambient temperature increases, a thermochromic on-label battery tester may be provided that is automatically calibrated to provide an accurate indication of the remaining battery capacity regardless of the ambient temperatures at which the battery tester may be used.
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Do Diep N.
Eveready Battery Company Inc.
Pophal Michael C.
Welsh Robert W.
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