(Please visit the site to view this file)Hi,
I'm currrently doing a failure analysis of a Battery Pack, 4S1P, LiPoly.I receive a claim with 4 pieces from the customer with the failure " will not charge". After I hook up the EV 23000 noticed it was not able to communicate even after wake up, also noticed the SBS progress was very slow, measured the impedances from the Fuel gage pins and noticed the SCLK pin has a very low impedance 200 Ohms after isolate it fro mthe PCB circuitry. Disconnected the 4 cells from the PCBA and then the short circuit dissapeared. Re-connected the cells to the PCBA and now the short was gone, hook up the EV2300 and I got communication and the following screen.