Hello,
I'm having trouble with a 4 cell pack based around the bq20z95. Specifically, the FullChargeCapacity figure won't seem to settle. We have tested the cells with a battery analyser and found that the capacity is a little lower than stated in the datasheet - 3.1Ah (@3A down to 2.5V, vs. 3.35Ah), but I'm more concerned that the FCC value produced by the gauge won't seem to settle. Our application draws just under 300mA, so I would thought we would settle on around 3Ah.
As shown in the attached bmp, the FCC value does hit 3Ah for most of the discharge cycle, but after a full discharge, it seems to fall back 2.65Ah during relaxation.
Any suggestions on why this may be happening will be appreciated. Perhaps I need to repeat the learning cycle?
Thank you,
Jeremy.
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