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by not_the_fda 2 days ago
Its a huge issue in cold climates.
1 comments

uphills + cold/hot climates, the ranges won't be able to compete with ICE. its basic physics. cold uphill still reduces charging speed, available power, and range, while sustained heat accelerates degradation. Thermal-management systems mitigate those weaknesses by consuming energy and adding cost, weight, and complexity.

meanwhile ICE has gotten ridiculously clean and efficient over the years it is more efficient at the shaft does not settle total-system efficiency, cost, weight, resource use, grid losses, battery production, or suitability for every operating env. Comparing an engine with a motor while ignoring the battery and electricity supply chain is silly

I still do not trust that sitting on a pile of lithium batteries is safe. NMC does not mean non flammable or consequence free. LFP cells can still enter thermal runaway, release toxic gases, reignite, and require difficult firefighting procedures. They also generally trade energy density and cold-weather performance for that improved safety. Also the speed charging ? That dramatically reduces the stability and lifespan of the batteries. Ton of used EVs not being sold because the battery replacement is somewhere between 40~60% of the car's value.

we had ICE for over a century now, its just like a software that gets continuous updates ICE systems are highly optimized, repairable, energy-dense, fast to refuel, and supported by enormous infrastructure. EVs are improving faster partly because they still have major weaknesses to solve. A steeper improvement curve does not prove that the present technology is superior for every use case neither is using the latest javascript framework.

> its basic physics

Could you ELI5 these basic physics? I've heard many people make claims like this but there's never any physics that actually follows. I've had most of an undergraduate curriculum of physics, so if it's beyond basic, then don't be afraid to refer to those physical ideas.

> meanwhile ICE has gotten ridiculously clean and efficient over the years it is more efficient at the shaft does not settle total-system efficiency, cost, weight, resource use, grid losses, battery production, or suitability for every operating env

Is 30% "ridiculously clean and efficient"? 35%? I'm not sure I can agree with that at all.

Battery production? That's ridiculously efficient. For a very small amount weight, there's an insane amount of Wh that get shuttled through that material, which can then be recycled into even more kWh of storage than went into the recycling process, due to the continual improvement in battery production efficiency.

Meanwhile, every single gallon of gas results in 20 pounds of CO2 emissions. Fracking oil requires disposing of 2-10 gallons of dirty waste water for every gallon of gas. That's a massive amount of waste for only 20-50 vehicle miles.

The latest battery chemistries perform incredibly well in cold and hot climates.

Internal combustion is not clean, and is inherently significantly less efficient than an electric motor.

Also, LFP chemistries are incredibly safe compared to NMC, which is what you're concerned about in terms of thermal runaway.

ICE is mostly stagnant tech. Meanwhile EV tech is rapidly improving!

> The latest battery chemistries perform incredibly well in cold and hot climates.

Oh? Show me a model of EV that has it is going to lower capacity battery heating and cooling systems.

I’m an automotive EE… I can’t name any. I’m working on things that will go in 2032 vehicles. Surprise, most are ICE, but of the EV vehicles the battery protection systems are becoming more rugged, not less.

Where does your supposition come from?

Sodium batteries loose only 10% or capacity and doesn't need pre-heating when charging. Latest Chinese LFPs perform well in cold too (I don't know exact deets and tbf they don't do great job publishing them other than marketing fluff). Also added ripple preheating that Tesla has.
I'm surprised they didn't flag and downvote you. There seems to be a certain crowd that seems view EV as sort of a panacea without considering the true realities which involve experience and research to know they are far from replacing ICE
If ICE is the only vehicle for you, because of religious reasons, thats okay. There are large and small countries ( China, Norway) that have majority EV cars and continue to grow. There are 120+ other countries that are buying EVs. Even in US, there are a few people who have bought EVs and realized it works for them.

A person who really needs an ICE car would encourage others to buy EVs because it would reduce oil demand, and with demand destruction, considerably lower oil prices. With lowered demand, Saudi Arabia can supply a barrel for $5 - $10/barrel from Ghawar Field. Which means a gas-head who commutes every day from Yukon, Canada to Guadalajara, Mexico has a significantly lower gas bill.

The only people who wants everyone to buy ICE are fossil fuel shills.

I find this whole discussion weird.

The whole world is in a transition phase. For some it will make sense to jump to pure EV use, for others it won't. That whole “The future is already here – it's just not evenly distributed.” thing...

I have one of each. They work well for different reasons.

EV is the charge-at-home city car that is preferred for every day use.

The ICE is for when two cars are needed and long distance travel because charging stations here are not well sorted yet.

My plan for the future: The ICE car will be replaced with a hybrid with a significant emphasis on battery. Then eventually it'll be an EV as well. We'll get there.

> If ICE is the only vehicle for you, because of religious reasons, thats okay

so you admit EV is a cult if ICE is a religion ? that's not okay.

I finally met someone who plans to downgrade from EV to ICE. He does 100k km per year, running multiple businesses. Lives 120km outside Dublin. Biggest issue seems to be wait at public charge stations. IMO he needs to get long range EV and get better chargers at home/work. But oh well, I'm not going to stop him if he's going to get luxury sports cars instead lol.
> Biggest issue seems to be wait at public charge stations.

No one has ever said “man, I love this gas station and wish I could stay here for two hours”

… idk, I guess people like Buckeys for some reason.

> The latest battery chemistries perform incredibly well in cold and hot climates.

Depends on your definition of cold. California cold sure. Wisconsin cold you are looking at losing 40%-60% range.

China cold tests their EVs in Harbin and Mohe, where “cold” means -40 (F or C doesn’t matter, it’s the same). They lose some range, and indoor charging garages are more common (for better charging performance), but the tech has gotten good enough that even harbiners (a small city of 20 million people) are adopting EVs at a rapid clip.
so good that batteries are ejected when they catch fire
It is so rare for EVs to catch fire that it makes the news whenever one does, and these form the core of the anti-EV memes that are popular with boomers on Facebook.