Hi,
My questions to the battery gauge, bq34z100-g1 are as follows:
1) TI FAE in Taiwan helped our CM to create golden image for the battery gauge. When we try to verify the golden image, we noticed that the current (mA) reading from gauge to gauge can vary up to 9% (I also compared the current reading to a multi-meter, some gauges are more accurate than others). We would like to know if variation within this 9% range is expected? Is there any recommendation other than calibrating each gauge at the factory?
2) Could the variation in the current (mA) reading affect the ability of the gauge to report battery level accurately? We have some end users reporting to us that their devices can only charged up to <95%. We also confirmed their findings from our end. Some gauges report battery level at 100% when charging is completed (or when charge current reaches the termination current level of 256mA) but some only report <95%. We suspect this might due to the variations in the battery pack's capacity as well (we use Lithium Ion 1S4P battery pack). We understand that the gauge can "self learn" during charging cycles, but concern the accuracy of the current reading might affect the "self learn" ability. Should we create a mapping table in software so that the end user will not get this "not able to charge to 100%" issue? What is a typical way to handle this?
Obviously there is still much we need to learn about the battery gauge so we appreciate for any advice and recommendations.
Thank you!
