Part Number:BQ78350
Hi,
I have a BQ78350-R1 on a 7S6P pack of 18650B cells. After following the learning process and uploading the 6 discharge logs to TI and getting the results and updating the parameters, two of my batteries both jumped from 43% to 7% during discharge. They both changed within 30 seconds of each other and the cells were well balanced after. (Two identical batteries operate in parallel with ideal diodes to power multiple BLDC motors).
I understand this means one of the cells has hit the EDV2 threshold (3501mV), which is not something that gets updated in the calibration process. There was still approximately 40% capacity left in the battery when it hit EDV2 and I continued to use it while it read 0% and carefully monitored the voltage.
What is the proper way to set EDV2? I understand Dod at EDV2 is also important but there are no instructions on how to set it properly. Could someone please share an example? I am using Panasonic 18650B cells, a very common cell so why is the default EDV2 value so far off? At 3501mV, an 18650B cell still has 50% capacity.
Do I need to change EDV2, EDV1 and EDV0 and how do I set them?
Thank you