We already know, that the only way to actively cool the battery without charging is to connect it to the plug and set a pre-charge cooling.
Let's say, I want to drive somewhere 60km away, but I have to go over a 1200m height, which is at halfway. That would be followed by a steep decline, where regen is used.
So on the way up, the speed would be between 20km/h-30km/h, which wouldn't cool batteries enough, especially not equally. The batteries in the middle of the pack would be warmer than the ones on the outside of the pack.
On the way down, using regen, that would be even more noticable, since previously warmer cells would warm up even more than the other ones, which would also result in unevenly charged cells.
My solution is to cool down the battery pack, or at least equally cool all cell at the top of the hill, before going down, using regen. But there's no plug up there.
Would Vectrix plugged to a 150W 12V->220V converter start a pre-charge cooling sequence, since that sequence only draws 45W?
I'd use a converter like this
and I'd connect it to a 3cell 2000mAh LiPo pack (my RC helicopter LiPo pack), which gives 12.6V fully charged.
If yes, than this should sufficiently cool the pack for about 15 minutes, which would be, for my purpose, enough.