I note there has been extensive discussion surrounding the apparent lack of temperature sensing for each of the 8 series cells in these battery packs.
I mentioned many posts ago the need in the manufacturing process to match cells for both "impedance" and "temperature". Each is relative to the other, so it is possible to deduce during the charging cycle (probably pulsed DC) the impedance of each cell under charge and by using a "look up table" determine accurately the related cell temperature.
No need for any more wires/sensors.