If there are 8k individual cells in the battery pack, what happens when an individual cell reaches zero? Will that individual cell be permanently dead, or can it be revived?
You would think with 8k individual cells, if you left it unplugged for just a couple of weeks (instead of the 6 weeks needed to brick the entire battery pack), using a normal distribution you could expect that at least some of the cells would reach zero. Would that permanently reduce the capacity for the entire battery pack?
Most battery management systems incorporate some sort of cell balancing algorithm to make sure cells stay close to a common voltage. Usually this is some sort of resistor (per cell) that dissipates a small current from that cell and bleeds it off as heat. This is usually used while charging to get everything in line.
That said, if a cell goes bad or has an extremely low capacity compared to the rest, there's not much you can do...
You would think with 8k individual cells, if you left it unplugged for just a couple of weeks (instead of the 6 weeks needed to brick the entire battery pack), using a normal distribution you could expect that at least some of the cells would reach zero. Would that permanently reduce the capacity for the entire battery pack?