With the load that draws current bigger than 200mA out of a single cell LI-ION battery, the bq34z100 output inaccurate reading.
With the load that is drawing about 600mA out of the battery:
The voltage at the terminal of the battery is 3.266 V. The gas gauge display 2.786 V.
Without the load, the voltage reading of the gas gauge is within 1% accuracy.
I'm wondering why this is the case?
I want to have an accurate reading at the battery terminal while discharging at C/10 and bigger, how do I solve this problem.
These are the steps I did:
1. Configure gas gauge according the battery data sheet. Battery Capacity: 5000mAh, Cutoff Voltage: 2.5. Full Charge Volt: 3.65
2. Calibrate the board
Here are the screenshots:
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EDIT: BAT+ and BAT- voltage: 2.786V
BAT+ and PACK- voltage: 2.77V
Here is connection schematic:
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Could anyone explain how bq34z100 takes cell voltage reading? How does the R30 = 0.01 Ohm comes into play? Could this R30 causing the voltage drop across it to be higher as the current going to it get higher? which in turn makes the cell voltage reading less accurate?
