Electric Vehicles

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Electric Vehicles are a key part of our tomorrow and how we get there. If we can get all the fossil fuel vehicles off our roads, out of our seas and out of our skies, we'll have a much better environment. This community is where we discuss the various different vehicles and news stories regarding electric transportation.

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Hyundai unveils new pulsating battery technology that could make major EV concern a thing of the past — here's how it works (www.thecooldown.com)

submitted 2 months ago by [email protected] to c/[email protected]

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[–] otter 40 points 2 months ago (11 children)

Key bit

"Unlike traditional heat pipes, pulsating heat pipes diffuse heat through the vibration and circulation of refrigerant inside ultra-thin tubes," EV Magazine reported. "The method offers more than 10 times the heat transfer efficiency of standard aluminium, effectively moving heat from overheated battery cells to cooling blocks, even under the high demands of a moving vehicle."

Since ultrafast charging superheats EV batteries, cooling the cells is critical. So, Hyundai's tech places the heat pipes between cells, reducing the risk of overheating by keeping internal temperatures throughout the battery stable.

[–] [email protected] 21 points 2 months ago (10 children)

So basically switched from passive to active cooling?

[–] VieuxQueb 5 points 2 months ago (2 children)

I was wondering why they weren't actively cooling batteries if heat is the killer. I guess the inovation is weight reduction of the cooling tech.

[–] [email protected] 11 points 2 months ago (2 children)

As the owner of a 2020 ioniq ev:

active cooling is already a thing
range effects are minimal
issues with viscosity changes to coolant as a result of temperature variation has resulted in 2 (warranty covered) coolant flushes
haven't had any issues since but we haven't had a hot day since my last service

It's imperfect but the fact they built a system at all is why I've had zero range attenuation in the 4 years I've owned it. If you keep the cells happy and comfortable they will stay that way (usually).

The system they are referring to in this post is a substantial upgrade to what they already equip their vehicles with.

[–] [email protected] 3 points 2 months ago

issues with viscosity changes to coolant as a result of temperature variation has resulted in 2 (warranty covered) coolant flushes

haven't had any issues since but we haven't had a hot day since my last service

Yes, I have had the same issue in my 2020 Ioniq. The car actually got recalled for this reason and they changed the coolant to a different one. Most likely this was done the last time you got a coolant flush, if not it will be done the next time you get your car serviced. The new coolant completely eliminates the issue

[–] VieuxQueb 1 points 2 months ago (2 children)

Kool, that's what I figured. Does not really directly affect range but helps with battery longevity when fast charging.

[–] [email protected] 4 points 2 months ago

Does not really directly affect range

Correct. Not in a way that changes anybody's plans. Absolutely not to the degree that the popular narrative in the media implies.

Tldr; we spend less money. Road trips that once cost 60-80$ in fuel cost 5$.

Like any tool a human isn't born with you learn to scale your trips and plans and routines to work in synergy with the tech....

...just like we did when carriages started becoming 'horseless'

[–] [email protected] 3 points 2 months ago

In the example of the guy you replied to it does actually help with range, but only in winter. The 2020 Ioniq can use the heat of the battery to help the heat pump heat the interior of the car, significantly reducing the range drop you experience during winter.

[–] [email protected] 3 points 2 months ago

Yes, pretty much all EVs have some form of active cooling these days

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