If_ they really charge like that, without the monitoring the cell voltage, the problems seen are to be expected, as even a minor mismatch (caused amongst others by aging) of the assumed inflection point to the actual cell would lead to overcharge.
I assume that they do monitor individual cell voltages though.
From the pics of the damaged battery, we can see that the individual cells are strapped together with steel bars and there is a loom sitting over the top of the cells that sits in a rectangular 'grid' over the top of the cells.
Surely these are the conductors which carry individual cell voltage information to the charging/monitoring system?
