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BQ4050: BQ4050,The SOC will gradually decrease

Part Number: BQ4050

3 sets of lithium iron phosphate batteries. The battery capacity of the finished product is 95%. However, after being stored in the warehouse for 2 months, the RC value of the batteries decreased significantly, and the SOC also decreased accordingly. But the battery voltage did not show a significant drop. Please help analyze the reasons. Please refer to the attached pictures and GG.

BQ4050 SOC drop-0421.gg.zip 

2bb6c1f87582c82afded42b95d348a22.png