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this post was submitted on 19 Sep 2024
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[Dormant] Electric Vehicles (Moved to !electricvehicles@slrpnk.net)
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They include climates in the study but only hot climates and temperate climates. Temperate climates perform the best of course, but that’s expected given the narrower temperature ranges.
I would like to see studies for cold climates. Here in Canada we have freezing temperatures for about half the year and sweltering temperatures for a quarter. The shoulder seasons bring lots of rain and temperature fluctuations. This mix of always changing temperatures and humidity (along with all the salt used to de-ice roads) is absolute havoc for ICE cars. It tends to rust them out a decades before the engines give out.
On the other hand, freezing temperatures are brutal on batteries (I know this from how my phone responds to the cold). I do know that a freezing cold battery needs a ton of extra energy to heat up before it can even begin charging. Having an EV in Canada without an indoor parking space for it is not a great experience.
A battery also needs a ton of energy to become cold. It’s like 300-500kg of mass you need to freeze. Most cars automatically warm up the battery.
I’ve had an EV in Finland for 4 years now and it’s the best winter car I’ve had. -30 C outside and it’s literally T-Shirt weather inside the car within 10 minutes. Zero issues starting after it’s been sitting outside for a few days either.
How does heat work in EVs?
In ICE cars it's waste heat generated by the engine, carried via antifreeze to the heater core, which air then passes through. Basically, a radiator.
Where does the waste heat come from? Or is it resistive or a heat pump or something?
Yes.
Heat pump is more efficient, but resistive works fine.
And seat heaters and heated steering wheel are super efficient to keep you warm.
Very true. I used to think seat warmers and heated steering wheels were like...obscene-tier creature comforts.
Nah. They're damn near necessities once you have it.
I just got back from Quebec and vas surprised to see a ton of electric cars- like California levels of full electric cars on the road. I have to assume that most of them have made it through the winter alright, otherwise we'd be hearing about it. They do test these things in very cold climates before they sell them.
Quebec has the highest percentage of ev as new car sales of all the provinces... Electricity there costs on average around 0.09CAD/kWh..... It's surprising there isn't more, and that in big part due to cost (Quebec is rather poor), the climate, and distances (Quebec is HUGE, if it included Labrador it would be a bigger landmass than Alaska).
Almost all new cars in Norway are electric, so it seems they do really well in the cold
Norway may be farther north than where a lot of Canadians live but it’s not colder. Where I live (Southern Ontario), it gets quite a bit colder than Oslo, despite being one of the warmer areas in Canada apart from the coastal regions.