Electronic battery tester configured to predict a load test result based on open circuit voltage, temperature, cranking size rating, and a dynamic parameter
First Claim
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1. A method of testing a storage battery, comprising:
- (a) measuring a dynamic parameter of the battery using a low alternating current signal;
(b) obtaining an open circuit voltage of the battery;
(c) measuring a temperature of the battery;
(d) obtaining a cranking size rating of the battery; and
(e) estimating a load test voltage of the battery as a function of the measured battery dynamic parameter, the obtained open circuit voltage of the battery, the measured battery temperature, an activation voltage, which is calculated based on the measured temperature of the battery and the obtained open circuit voltage, and the cranking size rating of the battery, the estimated load test voltage indicative of power remaining in the battery.
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Abstract
A method and apparatus is provided for rapidly and safely estimating the high-rate load test voltage of a storage battery utilizing open-circuit voltage, temperature and a dynamic parameter such as conductance or resistance. An output indicative of the condition of the battery is provided as a function of the estimated load test voltage of the battery compared to industry standards without the necessity to charge the battery or discharge the battery with high-rate loads using bulky load testing equipment.
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Citations
19 Claims
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1. A method of testing a storage battery, comprising:
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(a) measuring a dynamic parameter of the battery using a low alternating current signal; (b) obtaining an open circuit voltage of the battery; (c) measuring a temperature of the battery; (d) obtaining a cranking size rating of the battery; and (e) estimating a load test voltage of the battery as a function of the measured battery dynamic parameter, the obtained open circuit voltage of the battery, the measured battery temperature, an activation voltage, which is calculated based on the measured temperature of the battery and the obtained open circuit voltage, and the cranking size rating of the battery, the estimated load test voltage indicative of power remaining in the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic battery tester comprising:
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a positive connector coupled to a positive terminal of the battery; a negative connector coupled to a negative terminal of the battery; a voltage sensor configured to measure an open circuit voltage of the battery; a temperature sensor configured to measure a temperature of the battery; an input configured to receive a cranking size rating of the battery; and battery test circuitry configured to measure a dynamic parameter of the battery by applying a low alternating current signal to the battery using the first and second connectors, and to estimate a load test voltage of the battery as a function of the measured battery dynamic parameter, the measured open circuit voltage of the battery, the measured battery temperature, an activation voltage, which is calculated based on the measured temperature of the battery and the measured open circuit voltage, and the cranking size rating of the battery, the estimated load test voltage indicative of power remaining in the battery. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification