Group matching method for reducing dynamic voltage difference of power type lithium battery pack
A lithium battery pack and dynamic differential pressure technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve the problems of high failure rate, poor cycle life and high cost of battery packs, and improve capacity conversion. efficiency, reducing production costs and improving cycle life
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[0023] Example 1
[0024] S1. For 30 lithium iron phosphate LiFepo 4 The capacity of the lithium battery 50AH monomer cell is a group;
[0025] Set a Capacity interval / AH 1 50AH ~ 50.25AH 2 50.25ah ~ 50.5ah 3 50.5ah ~ 50.75ah 4 50.75ah ~ 51ah 5 51ah ~ 51.25ah
[0026] Based on the rated capacity 50ah of the battery, the capacity is divided into 5 gear positions, as shown above, according to the spacer data to the corresponding gear position, the capacity is located in the current gear position of the interval maximum terminal;
[0027] S2. Temperature atmospheric temperature at normal temperature at normal temperature at normal temperature of the unit, and then measure the K value, according to the k value;
[0028]
[0029] S3. ACIR and OCV tests for the monomer cells of S2;
[0030] S4. The cells of the S3 are divided into three groups according to the ACIR and OCV;
[0031]
[0032]
[0033] Among them, R, R represents the lower li...
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