Other Parts Discussed in Thread: BQ27510, BQSTUDIO, EV2400
A product that I am working on is using the BQ27510-G3. It has been observed that the fuel gauge has reported incorrectly in the following instance.
When testing the device's battery life in shelf mode, the device did not report a linear discharge, which was expected. The reported discharge was closer to an exponential trend line. Current draw while in shelf mode is in the range of 50 - 100 uA. The biggest difference observed between expected and actual SoC was roughly 20%.
It seems that the BQ27510 relies on open circuit voltage (OCV) measurements when the current is low. Is it possible that there is something in the implementation of the BQ27510 that would cause the OCV measurements to be off?