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Written by NNN on 2024-11-26 at 18:56

Why are #ebike batteries so picky?

When parked, our #EV will not heat the battery until it reaches -20C. So if it's -15C overnight, that's also the Operating Temp when we start driving. And if plugged-in, it will also start charging at -20C (though it will heat to 4C in the first 2 hours).

An iPad has storage temp to -20C.

But Bosch ebike batteries:

• storage: -10C

• operating: -5C

• charging: 0C

How can EVs get away with operating at -20C pack temp?

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Toot

Written by NNN on 2024-11-26 at 19:02

Related, I have no idea what temp my battery is. If I take a room-temperature (19C) PowerPack, and ride to a store an hour away at -14C, then 15 minutes shopping, then another hour home... has the battery gotten below -5C? I have no idea (though the motor turning off says maybe it did).

Can I use an IR thermometer to check battery temp? It's too bad the display won't tell me the pack temp.

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