Method for judging infiltration state of lithium ion battery
A lithium-ion battery, state technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of battery cell cycle performance safety degradation, electrical performance degradation, affecting the consistency of battery quality, etc., to avoid disassembly and damage. , Simple operation, high reliability effect
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[0039] Select a cell with a liquid electrolyte mass range of 80-140g, set the shelf temperature in step 2) to 45°C, and set the shelf time to 16h, 20h, and 24h respectively.
[0040] According to step 3), the test data is obtained, in which the cell disassembly state parameter is set as the wetting state parameter S1, and the value of S1 is defined as the ratio of the total number of completely soaked pole pieces to the total number of battery pole pieces, and the value range of S1 is 0 -1.0.
[0041]
[0042] Substitute the above temperature field temperature T1, T2, T3, and the data of the storage time t into Got the following data:
[0043]
[0044]
[0045] Comparing S1 and S, it can be found that when the storage temperature is 45°C and the storage time is 24 hours, the cell wetting effect meets the requirements, which also shows that the above functional relationship is feasible.
[0046] Compared with the prior art, the method for judging the wetting state o...
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