Other Parts Discussed in Thread: BQ34110, EV2400, , GPCCEDV
Hi,
As part of a university collaboration and development project, I recently acquired a BQ34110 battery gauge chip in order to monitor the state of charge of a Zendure Supertank power bank.
For this purpose, I acquired the evaluation kit and the EV2400 I²C interface module. After downloading all the necessary firmwares, installing the updates, and plugging everything in correctly, my group and I noticed that the voltage and current values delivered were correct but the total capacity was wrong.
On the attached screenshot, we can see that the Full charge capacity is at 2200mAh, while the Zendure has a capacity close to 27Ah. This measurement error logically leads to an error in the remaining capacity, in the relative state of charge and on the average time to empty since the software thinks that the battery is much smaller than it really is.
We tried to cycle the battery charge/discharge by keeping it connected to the software, we restarted the software and disconnected and reconnected the battery, thinking that it could calibrate the measurement but it didn't work. The last time the average time to empty stayed at 18min for a whole night because the Zendure could supply power for a long time. So I am contacting you to see if there is a way to calibrate the capacity of our power bank on BqStudio.
Thank you,
Nathan
Engineering student at Université Libre de Bruxelles.
