Tool/software:
Hi,
My customer encountered a problem when using BQ27426.
RD set terminate voltage at 3.3V. Terminate voltage is system shutdown voltage, and also the RSOC 0% relative voltage.
But now when the discharge reaches 3.3V, SOC is still 9%. Then it turns off when the shutdown voltage reaches 3.3V. Plugging in and charging can make SOC normally increase from 0%.
BR,
Zach
Hello Zach,
You must do a couple of things before you can expect the SOC to behave accurately:
Does this gauge have a learning function? Will it become more and more accurate after several charges and discharges? And can the accurate profile be taken out and applied?
Yes the gauge learns the battery parameters as the battery is cycled, but this is a ROM gauge, so every time the gauge is power cycled or restarted, it will revert to the default configuration and you will need to reprogram the golden image.
Regards,
Jonny.