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BQ27621-G1: SOC difference

Part Number: BQ27621-G1


Hi. I have a question about BQ27621-G1

Case1 ) Battery is no charging -> BQ27621-G1 initialize -> SOC Read

Case2) Battery is charging -> BQ27621-G1 initialize -> SOC Read

The difference between Case1 SOC and Case2 SOC is very big.

For example, when Case1 SOC is 20%, Case2 SOC becomes 60% after charging start.

Why this issue is occurred?

How can I fix accuracy?