Soldato
It’s all about trade offs though isn’t it?
My making the battery perform better in very cold climates, you make it perform worse when ragging it down the autobahn in the height of summer.
Let’s face it, very few people actually live in these cold climates compared to more temperate locations. Nearly everyone else, including U.K. buyers will want better performance in warmer weather.
No it’s not really a trade, more an error state. I’m not sure I get the point you are making but I can see the logic. The battery as a cooling system surface has only really been referenced on the recent EQXX concept to allow the full cooling system vanes to close at light road load. It’s not really a thing, just a good way to lose heat which is precious on an EV.
High speed cooling will be liquid and often a large amount of condensing performance. Often cars do have to now chose between keeping the powertrain or cabin cool as it can’t do both. It’s repeated a Acceleration and decell that will cook a battery, the motor continuous rating will bottleneck any battery thermal limits.
This is the problem with the Tesla consumption figures I personally see, they have phantom drain, large power use warming then after said charge the remaining journey is often taken as the efficiency for their general consumption.