PoLoMoTo

PoLoMoTo t1_j24z9ee wrote

Reply to comment by sold_snek in ELI5 why do electric vehicles have one big battery that's hard to replace once it's expired, rather than lots of smaller ones that could be swapped out based on need (to trade off range/power/weight)? by ginonofalg

I have no doubt that would work but I would be curious as to the longevity of that. Also if it was a high mileage battery or some fluke internal failure, and what percentage of the cells they actually replaced. I'll have to try to find the story sometime.

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PoLoMoTo t1_j24qijl wrote

Reply to comment by enjoyoutdoors in ELI5 why do electric vehicles have one big battery that's hard to replace once it's expired, rather than lots of smaller ones that could be swapped out based on need (to trade off range/power/weight)? by ginonofalg

To add on to this, yes some cells will die before others but in general when the battery pack is nearing the end of its life none of the cells are going to be very good anymore and you'd probably end up replacing all of them anyway. Additionally combining brand new cells with old worn cells is probably not a great idea for balancing.

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