5 ms·
> In fact, she adds, up to a point, rising temperatures only increase the electrolyte’s performance. This is the case for normal lithium-ion batteries as well;
by skykooler 7y ago
> In fact, she adds, up to a point, rising temperatures only increase the electrolyte’s performance.
This is the case for normal lithium-ion batteries as well; they perform better at 120°F than at 70°F (and lose significant performance at even lower temperatures).
- cellularmitosis 7y agoCold weather performance is an issue for the folks who replace their motorcycle battery with a lithium ion aftermarket upgrade. https://advrider.com/f/threads/lithium-ion-batteries-in-cold-weather.934390/ https://advrider.com/f/threads/lithium-ion-batteries-in-cold...
- Baeocystin 7y agoI have a LiFEPO4 battery in my motorcycle, and even here in the bay area of California, I notice the change it its cranking ability on colder days. It's a real issue with the chemistry, as attempting to charge it while cold causes some unfavorable reactions as well, so relying on resistive heating to bring it up to temp isn't a great idea. It is kind of amusing that cranking it a few times until it peters out from lack of charge, waiting for the heat to spread internally, then firing it right up as the capacity recovered due to temperature overcompensates for the previous drain, is a valid thing to do.
- mycall 7y agoHave you tried heating blanket?
- Baeocystin 7y agoFor my location, it would be more trouble than it's worth. If I lived somewhere a little colder, though, I think some kind of thermal control would be a real necessity.
- jhayward 7y agoAs far as I know all ion-exchange (chemical) batteries have a positive temperature coefficient of performance. Lead-acid, NiMH, Alkaline, Lithium-ion, Vanadium flow, etc.
- oliveshell 7y agoI'm curious, are there types of battery that don't use ion exchange? I'm familiar with physical energy storage using flywheels or compressed air; I suppose you could call something like that a battery if set up to spin a generator.
- jhayward 7y agoThat's an interesting question. As you say, it depends on definitions. I would say that some betavoltaic devices would qualify, and perhaps some phase-change stuff that I can't recall right now. Supercapacitors are essentially batteries but I seem to recall they actually do ion exchange as well.
- SlowRobotAhead 7y agoI wonder how many people know that electric vehicles have heaters and AC units for the battery packs?