Apparatus and methods for evaluating CEW energy cell performance
First Claim
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1. A method of evaluating performance of a CEW energy cell comprising:
- inserting a CEW energy cell into an input port of a portable test device;
performing a two-tier DC load test on the CEW energy cell by sequentially applying at least two different loads to the CEW energy cell, including a low constant current load and a high constant current load;
evaluating a voltage signature under the two-tier load test;
determining at least one internal resistance value based on said voltage signature; and
outputting at least one indicator relating to CEW energy cell status based on said determining.
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Abstract
A method and apparatus for evaluating CEW performance, in particular by evaluating a battery pack condition state via direct or indirect means. A two-tier load test for a CEW battery pack and an indirect wireless spark analysis tool are disclosed.
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Citations
13 Claims
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1. A method of evaluating performance of a CEW energy cell comprising:
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inserting a CEW energy cell into an input port of a portable test device; performing a two-tier DC load test on the CEW energy cell by sequentially applying at least two different loads to the CEW energy cell, including a low constant current load and a high constant current load; evaluating a voltage signature under the two-tier load test; determining at least one internal resistance value based on said voltage signature; and outputting at least one indicator relating to CEW energy cell status based on said determining. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of evaluating performance of a CEW energy cell comprising:
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performing a spark test with the CEW wherein a pulse train of high energy sparks is generated by the CEW; receiving with a wireless receiver a pulsed, a spark test signal emitted from the CEW during the spark test; providing a pulse shaping circuit and modifying the spark test signal with the pulse shaping circuit; calculating the pulse duration between each pulse based on an output from the pulse shaping circuit; and evaluating a condition of the CEW energy cell based on calculated pulse durations. - View Dependent Claims (8, 9, 10)
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11. An apparatus for evaluating performance of a CEW energy cell comprising, comprising:
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a portable housing having an input port size to receive and electrically couple to at least a portion of a DPM; a two-tier DC load test circuit connected to terminals of the DPM, including a low constant current load and a high constant current load, said circuit sequentially applying the two loads to the DPM terminals; a voltage sensor which receives a signal from the two-tier DC load test circuit; and a microprocessor which receives and evaluates a signal from the voltage sensor and outputs at least one indication of DPM condition based on said evaluated signal. - View Dependent Claims (12, 13)
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Specification