System and method for nondestructive testing of thermal batteries
First Claim
1. A method for testing a thermal battery that is configured to be activated by being ignited and is in a non-active state, the method comprising:
- applying a sinusoidal voltage to the thermal battery before igniting the thermal battery;
determining at least one of an impedance, a reactance, and a capacitance across at least two terminals of the thermal battery before igniting the thermal battery; and
comparing the at least one of the impedance, the reactance, and the capacitance to at least one of a reference impedance, a reference reactance, and a reference capacitance before igniting the thermal battery.
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Abstract
The present invention generally relates to a thermal battery testing apparatus and a method for testing a thermal battery. The method includes one or more of the following steps: connecting the thermal battery in series with a resistance; connecting the thermal battery and resistance in series with a sinusoidal voltage source; applying a sinusoidal voltage to the thermal battery, measuring an impedance, reactance and/or capacitance across two terminals of the thermal battery, comparing the measured impedance, reactance and/or capacitance to a reference impedance, reactance and/or capacitance; and indicating whether the tested thermal battery is “in family” or “out of family.” The battery testing apparatus may include a testing device configured to apply a sinusoidal voltage to the thermal battery and to measure the impedance, reactance and/or capacitance across two terminals of the thermal battery. The testing apparatus may further be configured to report “out of family” batteries.
35 Citations
12 Claims
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1. A method for testing a thermal battery that is configured to be activated by being ignited and is in a non-active state, the method comprising:
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applying a sinusoidal voltage to the thermal battery before igniting the thermal battery; determining at least one of an impedance, a reactance, and a capacitance across at least two terminals of the thermal battery before igniting the thermal battery; and comparing the at least one of the impedance, the reactance, and the capacitance to at least one of a reference impedance, a reference reactance, and a reference capacitance before igniting the thermal battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification