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How do the heaters in electric cars work?

With no coolant system, what do the Tesla and Leaf use for heaters? Just curious, I saw a Tesla on the way in to work this morning and that thought popped in my head....
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Old 06-10-2014, 07:03 AM
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Just a wild guess.

The batteries themselves have a cooling system on many electric vehicles. Maybe that can provide heat to the cabin.
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Old 06-10-2014, 07:12 AM
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I am so 20th Century. I would have said resistance heaters. So, smart guy, without any IC engine to produce a vacuum, what makes the wipers go?
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Old 06-10-2014, 07:16 AM
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Teslas have liquid cooled/heated battery packs that keep themselves at roughly room temperature, so there is a coolant supply that's always in the 70°F range. Leafs do not have liquid cooling, so any heat is from a resistance heater. The Volt takes the Tesla model one step further and will start its ICE for a few minutes to get 185°F coolant to heat the cabin if it's below 35°F outside, and not plugged in.
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Old 06-10-2014, 07:29 AM
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Where does the heat come from on an air (oil) cooled 911? I believe they also have resistance just like a space heater if the system doesn't give enough heat.

Patrick, the wiper are run from the vacuum pump just like the old Willys jeeps had.
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Old 06-10-2014, 07:30 AM
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Quote:
Originally Posted by flipper35 View Post
Where does the heat come from on an air (oil) cooled 911? I believe they also have resistance just like a space heater if the system doesn't give enough heat.

Patrick, the wiper are run from the vacuum pump just like the old Willys jeeps had.
old 911s have a heat exchanger in the exhaust. thats why they have such ridiculously powerful heat.
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Old 06-10-2014, 07:33 AM
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I'm pretty sure it is a heat pump in a Tesla
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Old 06-10-2014, 07:34 AM
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Old 06-10-2014, 07:39 AM
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Quote:
Originally Posted by kaisen View Post
...
I don't know anything about how EVs provide heat, but it's good to see kaisen posting here again
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Old 06-10-2014, 07:47 AM
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Old 06-10-2014, 07:49 AM
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Old 06-10-2014, 11:19 AM
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They don't. Not very well at least.

There is a reason you don't see many/any in colder climates.

Range drops to nothing as soon as you need electric heat.
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Old 06-10-2014, 11:30 AM
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Old 06-10-2014, 11:30 AM
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Originally Posted by pksystems View Post
They don't. Not very well at least.

There is a reason you don't see many/any in colder climates.

Range drops to nothing as soon as you need electric heat.
I'm in a cold climate. There are tons of them here. If you can keep them plugged in, you can set the climate control to allow "shore power" to heat the car. Then when you drive off it's already warm and you're just maintaining the temp. If it's not plugged in and you need to warm with 100% battery power, you're going to have a limited range (Volt not withstanding).
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Old 06-10-2014, 11:32 AM
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Quote:
Originally Posted by pksystems View Post
They don't. Not very well at least.

There is a reason you don't see many/any in colder climates.

Range drops to nothing as soon as you need electric heat.
i see them all the time here in Minnesota. even in winter ....
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Old 06-10-2014, 11:34 AM
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i am so 20th century. I would have said resistance heaters. So, smart guy, without any ic engine to produce a vacuum, what makes the wipers go?
lol!
Old 06-10-2014, 11:41 AM
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Heated seats... not kidding. I have a Volt - and yes, if you heat the cabin on a cold day it drains the batteries, however, heating your butt is much more energy efficient. I have only had to deal with a couple of cold mornings since I had the car, and butt heating seemed to be adequate for the 28° temp outside. I am sure when I have to deal with -0° I will be using the heater....
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Old 06-10-2014, 12:18 PM
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Hippie farts, really? Must be like old Cheerios and beer....
Old 06-10-2014, 12:20 PM
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Had a friend with a 60s Elan - of course the heater was dicey.... he always joked - 'Just wrap a weasel around your neck - you'll be fine.'
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Old 06-10-2014, 12:56 PM
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