Yesterday, I read a big section i'd missed on the Tech.forum thread/
THE CELLS ARE EACH COMPOSED OF SEVERAL (7?) SMALL CELLS IN PARALLELL
In essence, this works like your car-battery, several plates alternately stacked pos-neg-pos-neg to get the surface-area for the capacity and discharge-rate required.....all the plates of each polarity are linked together, so there's only 1 Pos and one Neg connection.
The problem with these Lithium Cells, is the charger ONLY MONITORS THE CELL_GROUP AS A WHOLE.
I don't pretend to know how sensitive the monitoring-system is, but now believe that the internal configuration and control-boards of the Thales "power storage box" needs a serious looking at......OOPS They're going to do that.
The charging-unit MUST be able to see yhe individual sub-cells in a stack which form one of the 8 cells in the battery.....once a small sub-cell runs -away, it would appear a domino-effect teces place and the thermal-runaway cascades through the entire battery.
Poor battery design, for the application and poor charger design which fails to adequately monitor and counter the inadequacies in the battery-pack it's supposed to control.......
all just my opinion ,of course.