Detection method for low-temperature performance uniformity of lithium ion batteries
A lithium-ion battery and detection method technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as large differences in electrical properties, and achieve excellent performance and ensure consistency.
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[0025] The method of the present invention will be described in more detail below in conjunction with the specific experimental process.
[0026] Instruments: Comprehensive battery tester (MACCOR 3400), high-precision battery test system ((Xinwei TC53), temperature and humidity control box (SPHH-101), data collector (model FLUKE 2620) and multimeter (Unide UT33B) .
[0027] Test object: domestic power lithium ion battery, rated voltage 3.7V, nominal capacity 10Ah; overall dimensions (length×width×height): 133mm×66mm×18mm; the positive electrode active material of the battery is LiMn 2 O 4 , The anode active material is graphite, and the main component of the electrolyte is LiPF 6 , EC (ethylene carbonate) and DMC (dimethyl carbonate), the separator is celgard 2325.
[0028] The method for detecting consistency of low-temperature performance of lithium-ion batteries is as follows:
[0029] (1) Perform 10 charge-discharge cycles of 10 single lithium-ion batteries at room temperature (20...
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