h a l f b a k e r yWarm and Fussy
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In recent winter months various EV owners discovered that if their battery got too cold the charging station software would refuse to charge it. While many EV vehicles have a battery heating function the driver must remember to activate it prior to cold weather charging and while there is still sufficient
voltage available.
If a scrap of nuclear waste were encapsulated in steel one would have a source of perpetual* heat, a hot marble. An antifreeze solution containing a hot marble and irrigated through channels throughout the battery pack via a small pump would keep the battery at a minimum temperature, suitable for charging even in the dead of winter. A heat sink might be used to mitigate excessive temps in really hot weather, perhaps there is already a system in use.
* the half-life of, say, Cs-137 is about 30 years
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Annotation:
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Or we could just spoof the sensors with an adapter that plugs in between the battery and the charger and gives a fake temperature reading? |
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Is there a legitimate safety reason chargers refuse to charge cold batteries or is it just a design fault in the chargers? |
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Just did a search for //why won't cold batteries charge?// [a1] and got this back in the top hit. |
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//cold temperatures cause fluids to flow more slowly. So, the electrolytes in batteries slow and thicken in the cold .. can prevent the lithium ions from properly inserting// etc. |
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So it's a physical properties issue? a spoofer won't fix, they physically can't charge if they're too cold, rather than the charger won't charge them, there's no sensors (causing it) to spoof. |
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I assume this is at public chargers where they want to charge at maximum rates, because I don't see why a home charger couldn't just start at low power until the battery warms up. |
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At commercial chargers, you could offer a separate parking space with infra red heat lamps (or a box of chickens) to warm the underside of the car. |
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Just not feelin it, sorry. [-] |
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