BQ35100EVM-795: Using BQ35100 with Li-MnO2 and State-of-health

Hi Sandberg,

What type of battery are you using? Is the curve above a real discharge data? The gauge needs exact Chem ID match in order to update the SOH correctly, and the voltage readings should be taken for SOH calculations after the battery is well relaxed.

Best Regards,

Abraham

Hi Abraham,

Thanks for the respond.

The battery cell chemistry used is Li-Mn-O2. And with Chem ID 635.

I have made three measuring rounds with three different relaxsation times. One with 5 seconds, one with 30 seconds and a third with 10 minutes relaxsation.

The difference I can see between the measurements is that the SOH 'plateau' is on different levels otherwise the curve is equal.

The plateau with 5 seconds relaxsation is at 41%. with 30 seconds relaxsation it is at 36% and with 10 minutes it is at 65%.

Hi,

The documentation says nothing about how long the relaxation must be.

Note that this is a Li-Mn-O2 cell, a primary battery and can not be charged

/Per