Method and apparatus for determining cold cranking amperes value
First Claim
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1. A method for determining the cold cranking ampere (CCA) value of a battery under test comprising the steps of:
- computing and storing an algorithm of battery CCA as a function of battery internal resistance (IR);
measuring the IR of the battery under test; and
using the measured IR determining the CCA value of the battery under test from the stored algorithm.
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Abstract
A method and apparatus for determining the cold cranking ampere (CCA) value of a battery under test in which an algorithm of battery CCA as a function of battery internal resistance (IR) is provided, the IR of the battery under test is measured, and the measured IR determines the CCA value of the battery under test from the algorithm. The method and apparatus are used either in a vehicle in which the battery is installed or on a stand alone basis.
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14 Claims
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1. A method for determining the cold cranking ampere (CCA) value of a battery under test comprising the steps of:
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computing and storing an algorithm of battery CCA as a function of battery internal resistance (IR);
measuring the IR of the battery under test; and
using the measured IR determining the CCA value of the battery under test from the stored algorithm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for determining the cold cranking amperes (CCA) value of a battery under test comprising:
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a computer having a memory in which is stored an algorithm relating CCA to battery internal resistance (IR) of batteries; and
circuit means for acquiring voltage and current data from the battery under test to enable the IR to be calculated, wherein said computer calculates IR of the battery under test and uses the calculated IR with the stored algorithm to determine the CCA value of the battery under test. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification