EIS rapid measuring method of lithium-ion battery
A lithium-ion battery and measurement method technology, applied in the field of rapid measurement of battery impedance, can solve the problems of slow EIS test, difficulty in engineering implementation, long test time, etc., and achieve the effects of accurate measurement, fast test speed and short test time
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[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0034] Such as figure 1 Shown, the EIS fast measurement method of a kind of lithium-ion battery of the present invention, comprises the steps:
[0035] S1. According to the impedance of the lithium-ion battery tested in the laboratory, determine the range of the response voltage of the lithium-ion battery at different frequencies;
[0036] S2. Determine the frequency and amplitude of the excitation square wave current at different frequencies according to the impedance of the lithium-ion battery tested in the laboratory and the amplitude range of the response voltage, and form an excitation square wave current spectrum of different frequencies and different amplitudes;
[0037] S3, applying a square wave current to the lithium-ion battery, determining the frequency of the square wave current to be applied, determining the sampling frequency according to the ...
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