I'm using the BQ20Z65 with a 4s6p pack. Since short time we are delivering battery packs with this configuration. Today I got some returns from a customer with the fault that the SOC is wrong. They were charging the batteries, but SOC was still at 30 % even the batteries were fully charged. When they arrived, SOC showed 100 % and FCC was in a range of 7800 mAH, but the battery should have 9000 mAh. When applying a load to the battery the FCC changed to 2700 mAH, SOC ist still at 100 %. When charging the battery, SOC stays at 2700 mAH.
What goes wrong with the calculations? Can you please help me?
Michael Houzer