BQ34110: Remaining Capacity resets when discharge.

Part Number: BQ34110
Other Parts Discussed in Thread: GPCCEDV

Greetings everyone,

We are designing a BMS for a battery with a configuration of 7s1p with a capacity of 4200mAh. The battery does a full charge with CC-CV and the Remaing Capacity (RCap) reaches 4200mAh. After resting we proceed to discharge the battery with 1C and the Remaning Capacity drops to zero "instantly".

It is important to note that:

  • The parameter values were set by using the online GPCCEDV tool.
  • Multiple configurations were tested (e.g. [EDV_CMP] = 0 etc.)
  • This problem is happening frequently but not always. 

 Logs from a test (showing the RCap dropping to 0): Dis_Chg.csv 

Gauge configuration: BQ34110_Registers.csv 

Thank you in advance!