METHOD OF TESTING THE CAPACITY OF A LEAD-ACID BATTERY
First Claim
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1. A method of testing the capacity of a load-acid battery comprising the steps of:
- initially measuring the internal resistance of said battery when the specific gravity of the battery'"'"''"'"'s electrolyte is greater than 1.150;
subsequently measuring the internal resistance of said battery when the specific gravity of the battery'"'"''"'"'s electrolyte is greater than 1.150; and
, comparing the values of the initial and subsequent measurements to ascertain if the value of said subsequent value exceeds the value of said initial value by a predetermined amount.
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Abstract
A method of testing the capacity of a lead-acid battery where the internal resistance of the battery is initially measured when the battery is relatively young and the internal resistance is subsequently measured periodically. By comparing the values obtained on these subsequent measurements with the initial value, it is determined when a substantial increase occurs in the internal resistance of the battery. This substantial increase indicates that the battery is near the end of its life.
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Citations
5 Claims
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1. A method of testing the capacity of a load-acid battery comprising the steps of:
- initially measuring the internal resistance of said battery when the specific gravity of the battery'"'"''"'"'s electrolyte is greater than 1.150;
subsequently measuring the internal resistance of said battery when the specific gravity of the battery'"'"''"'"'s electrolyte is greater than 1.150; and
, comparing the values of the initial and subsequent measurements to ascertain if the value of said subsequent value exceeds the value of said initial value by a predetermined amount.
- initially measuring the internal resistance of said battery when the specific gravity of the battery'"'"''"'"'s electrolyte is greater than 1.150;
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2. The method as recited in claim 1 wherein said initial measurement is made when said battery is relatively young.
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3. The method as recited in claim 2 and including recording said initial measurement directly on said battery so that it may be later compared with the value of said subsequent measurement.
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4. The method as recited in claim 2 wherein said predetermined amount by which said subsequent value is to exceed said initial value is about one-half said initial value, thereby indicating that about only 10 percent of said battery'"'"''"'"'s useful life remains.
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5. The method as recited in claim 2 including periodically repeating said subsequent measuring of the internal resistance of said battery and said comparing of said subsequent values obtained with said iniTial value, until one of said subsequent values exceeds said initial value by a predetermined amount.
Specification