Battery internal short circuit diagnosis method and device based on electric quantity estimation and storage medium
A short-circuit diagnosis, in-battery technology, used in battery/fuel cell control devices, measurement devices, short-circuit tests, etc., can solve the problems of long duration, no obvious electrical and thermal characteristics, etc., to ensure safety and accuracy. sexual effect
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[0047] like figure 1 As shown, this embodiment provides a method for diagnosing a short circuit in a battery based on power estimation, and the method includes:
[0048] S1. Obtain offline voltage and current data of several charging cycles of the battery to be diagnosed;
[0049]S2. Taking the accuracy of estimating the electric quantity in the charging voltage interval based on the Arrhenius aging model as a constraint condition, using an intelligent optimization algorithm to determine the optimal charging voltage interval of the battery;
[0050] S3. Obtain the actual power in the optimal charging voltage range of the battery online, and determine the charging cycle in which the internal short circuit occurs based on the Arrhenius aging model.
[0051] Among them, the Arrhenius aging model is expressed as:
[0052]
[0053] C A (n)=(1-ξ(n))·C 0
[0054] Among them, ξ(n) is the relative power loss in the battery charging voltage range, A is a constant greater than ze...
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