BATTERY TESTING DEVICE AND METHOD THEREOF
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United States of America Patent
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May 17, 2017
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Jul 27, 2016
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Abstract
A battery testing device includes a power supply, a voltmeter, a galvanometer, a differential circuit and an analyzer. The power supply is configured to provide a constant-current signal or a constant-voltage signal to a subject battery. The voltmeter is configured to detect a voltage waveform generated by the subject battery when the power supply provides the constant-current signal to the subject battery. When a voltage value of the voltage waveform achieves a threshold voltage value, the power supply switches to provide the constant-voltage signal to the subject battery. The galvanometer is configured to detect a current waveform generated by the subject battery. The differential circuit processes the voltage waveform and the current waveform by a second-order differential. The analyzer determines a testing result of the subject battery according to the processed voltage waveform and the processed current waveform.
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