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The cold hard truth about electric vehicles in winter

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Re: The cold hard truth about electric vehicles in winter

#11
post #7

Looks more like a brand problem. Especially Chevy. Different battery technology?

I think it's largely a battery management system problem, may also be pack quality. I've always felt like part of Tesla's lead in EVs has allowed them to develop some "special sauce" in the form of battery management.

Other manufacturers that have just started may be playing significant catch-up to Tesla's lead.

Re: The cold hard truth about electric vehicles in winter

#12

Range impact of cold weather does seem to be a real thing, I can't speak personally because I own a Tesla which has some of the lowest impact. Another thing to keep in mind is: Charging speeds of cold temps. While the Tesla seems to do great at range, charging at cold temps is not great. When it's below freezing, home charging can be tough to impossible. A few days ago (when it was merely "cold", before the huge cold…

Are you in a garage?

As long as you have 30+ amps of 240v, you are fine charging in winter. It will spend 5-15 minutes warning the pack (and show only a little charge rate) and then kick into your full charge rate.

The only time you are screwed is in like 15-20 amp 120V, it takes nearly all the power to keep the battery warm so almost nothing left to charge. If it weren’t for winter I likely would have kept only a 120 in my garage as that is plenty for summer charging at home.

Re: The cold hard truth about electric vehicles in winter

#13

Range impact of cold weather does seem to be a real thing, I can't speak personally because I own a Tesla which has some of the lowest impact. Another thing to keep in mind is: Charging speeds of cold temps. While the Tesla seems to do great at range, charging at cold temps is not great. When it's below freezing, home charging can be tough to impossible. A few days ago (when it was merely "cold", before the huge cold…

These are all excellent points. If you navigate to a supercharger or a compatible fast dc charger in a Tesla, the vehicle will heat the battery pack appropriately for faster charging (based on max current capability at the charger). High level, this is a call for ubiquitous level 2 charging everywhere (and intelligent battery pack management when fast charging is available), with enough power to both charge the vehicle and keep the pack warm. We’re at the same stage with EVs as combustion vehicles were where you had to buy a can of petrol to fill it up, and gas stations weren’t ubiquitous. Make Charging Infra Ubiquitous.

Of course, within certain latitudes, more robust infrastructure is less necessary (the closer you get to the equator). Texas, Florida, and California have most of the US population and will rarely see these conditions (US centric).

Re: The cold hard truth about electric vehicles in winter

#14

Earlier quoted context omitted.

It also matters who has heat pumps and who doesn’t. Keeping the meat bags warm is a lot of energy.

The heat pump is for the batteries. If there's some heating/cooling left over, it's for the meatbags.

I don’t think many people are driving around in winter with a 30 degree cabin temp. IME meat bags get priority at all times except while supercharging, when the temp can go pretty wild while it focuses on the battery.

Re: The cold hard truth about electric vehicles in winter

#15
post #4

Fun test by Out of Spec Reviews on his Tesla Model 3: https://www.youtube.com/watch?v=i-c8AUeKs5c I Deep Froze My Tesla And Immediately Plugged It Into A Supercharger To See What Happens. I believe Bjørn Nyland did some similar testing too a while ago.

This is right after some Electrify America co-produced/co-designed stations didn't work in the cold, with his hypothesis being the voltage leak detection system within the charger breaking and thus not allowing current to flow: https://youtu.be/fq0RAjJ1PKQ

Re: The cold hard truth about electric vehicles in winter

#16
There's a long distance motorcycle travel series with Ewan McGregor and Charlie Boorman called "Long Way Up" where they go from the bottom of South America to LA on electric motorcycles. They had a lot issues with both range and charging the motorbikes in the first few episodes when they were dealing with the cold winter climate in Tierra del Fuego. Once they got far enough north into warmer climates the bikes were charging a lot quicker and getting a lot more range.

Either someone is going to have to come up with an ingenious solution or electric vehicles are going to be of limited use in cold weather locations where space is not abundant enough for garages (quite a lot of European cities). Infrared heating seems quite efficient, maybe the solution lies there.

Based on the article, that Tesla is looking pretty impressive though!

Re: The cold hard truth about electric vehicles in winter

#17

Range impact of cold weather does seem to be a real thing, I can't speak personally because I own a Tesla which has some of the lowest impact. Another thing to keep in mind is: Charging speeds of cold temps. While the Tesla seems to do great at range, charging at cold temps is not great. When it's below freezing, home charging can be tough to impossible. A few days ago (when it was merely "cold", before the huge cold…

Are you in a garage? As long as you have 30+ amps of 240v, you are fine charging in winter. It will spend 5-15 minutes warning the pack (and show only a little charge rate) and then kick into your full charge rate. The only time you are screwed is in like 15-20 amp 120V, it takes nearly all the power to keep the battery warm so almost nothing left to charge. If it weren’t for winter I likely would have kept only a 12…

Same was true (symmetrically more it less) at summer temps north of Phoenix: all the power went to cool the battery leaving nearly uselessly slow recharge times.

Re: The cold hard truth about electric vehicles in winter

#18
post #16

There's a long distance motorcycle travel series with Ewan McGregor and Charlie Boorman called "Long Way Up" where they go from the bottom of South America to LA on electric motorcycles. They had a lot issues with both range and charging the motorbikes in the first few episodes when they were dealing with the cold winter climate in Tierra del Fuego. Once they got far enough north into warmer climates the bikes were c…

WarpedPerception solved this problem by installing a 400cc generator in his Tesla that ran continuously on his 1800 mile road trip

Re: The cold hard truth about electric vehicles in winter

#19
Anecdotally last winter, had a Model Y up in maine for a trip home. I arrived at a backwoods house with ~60 miles left. It was around 10 farenheit the next day when I hooked up a 110 volt line to the car. Over the next 30 minutes the mileage dropped to 55 as it took more energy to heat the battery than the line could deliver.

I unhooked it and planned to drive 20 miles to the nearest charger, but after 1 mile of travel, it had dropped to 40 miles left. I turned around and drove back, now with ~20 miles left.

I parked the car in an unheated garage and plugged it back in, praying that the car would heat the garage to the point it could start charging. Maybe 2-3 hours later it started to take a charge, and 3 days later it was up to 150 miles, and I drove it to a super charger.

I realized after that, if I ever moved back to Maine and wanted a tesla I

- would need a heated garage

- I could never expect to leave my car overnight at a friends / trip during the winter.

Re: The cold hard truth about electric vehicles in winter

#20
post #16

There's a long distance motorcycle travel series with Ewan McGregor and Charlie Boorman called "Long Way Up" where they go from the bottom of South America to LA on electric motorcycles. They had a lot issues with both range and charging the motorbikes in the first few episodes when they were dealing with the cold winter climate in Tierra del Fuego. Once they got far enough north into warmer climates the bikes were c…

Hopefully we discover a new battery chemistry

We seem to stumble on new chemistries that get to production every few decades so cross your fingers

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