HI There,
I have an URGENT question on the BQ2063 from my customer.
After a long time (6 months up to 1 year) in “Low power storage mode”,a customer starts using the batteries and there’s an offset in the gas gauge reading vs the real state of charge of the battery. The battery is full (12.6V) although the BQ2063 indicates a much lower state of charge (75%, 50% or even lower). This situation seems to worsen over time. Its the offset in the SOC reading that is causing the problem here and gets larger over time.
Our question is: is it mandatory to perform a calibration process after a long time in “Low power storage mode” for the BQ2063?
This does seem to resolve the problem but we were wondering why this drift/offset is occurring? Is there a better way to resolve this?
Here are the steps when they first get the battery before it gets shipped out to their customer:
- Calibrate the battery;
- Adjust the state of charge to 30% (for customer delivery);
- Activate the low power storage mode;
- Customers use the battery after many months, even up to 1 year.
Thanks,
Mark