Defect cell in battery pack

One of the 100 cells, cell #65 is dying. This is noticeable under hard acceleration and the top speed has dropped to 141 Km/h.

VMS display defect cell

VMS display showing cell #65 dropping in voltage

It will be quite an operation to get to the defect cell. First te body needs to be removed and than I need to open the black box.

battery pack, rear clam removed

Battery pack, rear clam removed.