Apparatus and method for simulating a battery tester with a fixed resistance load
First Claim
1. A method of testing a storage battery rated using the Japanese Industrial Standard (JIS), the method comprising:
- (a) measuring a dynamic parameter of the battery;
(b) obtaining an open circuit voltage of the battery;
(c) obtaining a temperature of the battery;
(d) setting a predetermined load resistance value;
(e) estimating a load voltage of the battery as a function of the measured battery dynamic parameter, the open circuit voltage of the battery, the load resistance value and the temperature of the battery;
(f) predicting a bounceback voltage of the battery; and
(g) utilizing the bounceback voltage, the load voltage and the battery temperature to rate a strength of the battery by categories of JIS group size numbers.
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Abstract
A method and apparatus for simulating a battery tester with a fixed resistance load, such as a widely used Japanese load tester that rates the strength of Japanese batteries that are categorized under the Japanese Industrial Standard (JIS), are provided. This invention simulates such a device without invoking large current loads, yields familiar results, utilizes an existing database and provides more conclusive testing. The method includes measuring an open circuit voltage (OCV), temperature and a dynamic parameter of the battery. A load voltage of the battery is estimated as a function of the measured battery dynamic parameter, the OCV, the load resistance value of the load tester and the battery temperature. A bounceback voltage (BBV) of the battery is then predicted. The BBV, the load voltage and the battery temperature are utilized to rate the strength of the battery.
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Citations
30 Claims
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1. A method of testing a storage battery rated using the Japanese Industrial Standard (JIS), the method comprising:
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(a) measuring a dynamic parameter of the battery;
(b) obtaining an open circuit voltage of the battery;
(c) obtaining a temperature of the battery;
(d) setting a predetermined load resistance value;
(e) estimating a load voltage of the battery as a function of the measured battery dynamic parameter, the open circuit voltage of the battery, the load resistance value and the temperature of the battery;
(f) predicting a bounceback voltage of the battery; and
(g) utilizing the bounceback voltage, the load voltage and the battery temperature to rate a strength of the battery by categories of JIS group size numbers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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 input configured to receive a temperature of the battery; and
battery test circuitry configured to;
(a) measure a dynamic parameter of the battery using the first and second connectors;
(b) estimate a load voltage of the battery as a function of the measured battery dynamic parameter, the open circuit voltage of the battery, a load resistance value and the temperature of the battery;
(c) predict a bounceback voltage of the battery; and
(d) utilize the bounceback voltage, the load voltage and the battery temperature to rate a strength of the battery by categories of JIS group size numbers. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of testing a storage battery comprising:
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(a) measuring a dynamic parameter of the battery;
(b) obtaining an open circuit voltage of the battery;
(c) obtaining a temperature of the battery;
(d) setting a predetermined load resistance value;
(e) estimating a load voltage of the battery as a function of the measured battery dynamic parameter, the open circuit voltage of the battery, the load resistance value and the temperature of the battery;
(f) predicting a bounceback voltage of the battery; and
(g) utilizing the bounceback voltage, the load voltage and the battery temperature to rate a strength of the battery. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. 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 input configured to receive a temperature of the battery; and
battery test circuitry configured to;
(a) measure a dynamic parameter of the battery using the first and second connectors;
(b) estimate a load voltage of the battery as a function of the measured battery dynamic parameter, the open circuit voltage of the battery, a load resistance value and the temperature of the battery;
(c) predict a bounceback voltage of the battery; and
(d) utilize the bounceback voltage, the load voltage and the battery temperature to rate a strength of the battery. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method of testing a storage battery comprising:
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(a) determining a value of load current that will be drawn from the battery;
(b) determining the value of voltage that the battery will achieve under the load current; and
(c) utilizing the values determined in steps (a) and (b) to rate a strength of the battery.
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30. A method of testing a storage battery comprising:
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(a) obtaining an open circuit voltage of the battery;
(b) obtaining a temperature of the battery; and
(c) predicting a bounceback voltage of the battery as a function of the open circuit voltage and the temperature of the battery. esistance value step (d)
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Specification