Electronic battery tester
First Claim
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1. An electronic battery tester for determining condition of the storage battery, comprising:
- a four point Kelvin connection adapted to electrically couple to the terminals of the battery;
an adjustable forcing function having a forcing function output with a time varying component having an adjustable level in response to an adjustment input, the forcing function output coupled to a first pair of connections of the Kelvin connection;
a dynamic response sensor coupled to a second pair of connections of the Kelvin connection configured to provide a sensed output related to a time varying response of the battery to the forcing function;
digital circuitry coupled to the forcing function and the dynamic response sensor configured to provide the adjustment input to the forcing function whereby the forcing function output level is changed between a plurality of different levels, the digital circuitry configured to measure a dynamic parameter of the battery as a function of the sensed output at a plurality of different forcing function levels.
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Abstract
An electronic battery tester for determining a condition of a storage battery includes a forcing function adapted to couple to the battery. Circuitry coupled to the forcing function is adapted to obtain measurements from the battery at multiple levels of the forcing function. In the method according to the present invention, a forcing function is applied to the battery at a first level and a first measurement is obtained. The forcing function is applied at a second level and a second measurement is obtained. The first and second measurements are correlated to condition of the battery.
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Citations
22 Claims
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1. An electronic battery tester for determining condition of the storage battery, comprising:
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a four point Kelvin connection adapted to electrically couple to the terminals of the battery;
an adjustable forcing function having a forcing function output with a time varying component having an adjustable level in response to an adjustment input, the forcing function output coupled to a first pair of connections of the Kelvin connection;
a dynamic response sensor coupled to a second pair of connections of the Kelvin connection configured to provide a sensed output related to a time varying response of the battery to the forcing function;
digital circuitry coupled to the forcing function and the dynamic response sensor configured to provide the adjustment input to the forcing function whereby the forcing function output level is changed between a plurality of different levels, the digital circuitry configured to measure a dynamic parameter of the battery as a function of the sensed output at a plurality of different forcing function levels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21)
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13. A method of testing a battery, comprising:
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applying a forcing function having a time varying component at a first level to the battery through a first pair of connections of a Kelvin connection;
obtaining a first dynamic response measurement through a second pair of connections of the Kelvin connection related to a response of the battery to the applied forcing function;
applying the forcing function having a time varying component at a second level to the battery through the first pair of connections of a Kelvin connection;
obtaining a second dynamic response measurement through the second pair of connections of the Kelvin connection related to a response of the battery to the applied forcing function; and
correlating the first and second dynamic response measurements to a condition of the battery. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 22)
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Specification