Zarathustra wrote: ↑Wed Oct 02, 2019 10:20 pm
How does the discharge of the battery work?
Do they ‘spread’ the discharge evenly over all ‘group of cells’ all at once...?
Or do they discharge each ‘(group of)cell(s)’ after the other; so when one (group of)cell(s) is depleted you go to the next (group of)cell(s)?
I would think they can take individual cells on- and offline on the fly so they use each cell after the other, more or less.
Potentially there are 4 states a cell can be in. Charging, cool down from charging, discharging and cool down from discharging. The temperature limit for common Li-ion cells is at about 60°C, but the optimal working temperature is at about room temperature. It will be pretty hard to keep them that cool in a F1 car but around 35-45°C could be possible.
That would mean that under race conditions, they use a group of cells for instance just for the start sprint, then let them cool down for a moment then charge them up again, let them cool down again and now discharge them again. The cells which are used for a particular task can vary. For instance at the start you discharge cell 1,2,3 and 4. let them cool down but now for charging the system can only use cell 1,2 and 4 for instance cell 3 hasn't cool down enough, so the system removes cell 3 from the group and adds cell 5 which is already cool enough to be used again.
Atleast that's how i imagine the system could work.