Quantitative diagnosis method for short circuit in battery based on voltage and electric quantity outlier coefficients
A diagnostic method and technology of outlier coefficient, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of high cost, inability to quantitatively calculate internal short-circuit resistance, and high technical difficulty, achieving short diagnosis time and easy implementation. , the effect of high diagnostic accuracy
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[0048] Such as figure 1 As shown, this embodiment provides a method for quantitatively diagnosing a short circuit in a battery based on voltage and electric quantity outlier coefficients, the method comprising:
[0049] 1) Online collection of voltage, current and charging time data of each single battery during the charging process of the power battery.
[0050] 2) Calculate the voltage outlier coefficient and electric quantity outlier coefficient of each single battery in each cycle charging process respectively.
[0051] Among them, the voltage outlier coefficient is obtained by the following formula:
[0052]
[0053] Among them, u i (n 1 ) for the nth 1 The voltage outlier coefficient of the i-th single battery during the charging cycle, t is the charging time, t 0 (n 1 ) for the nth 1 The start time of a cycle charging process, t s (n 1 ) for the nth 1 The termination time of a cycle charging process, for the nth 1 The voltage of the i-th single battery a...
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