131–140 of 172 posts
Somewhat off-topic, but maybe someone knows. There's one thing that worries me about EVs: local pollution. So, ICE cars release CO2 + they release local pollutants (NO, CO, etc), particulate matter, that kind of thing. EVs obviously don't directly release CO2 nor do they release those local pollutants. However, EVs are on average much heavier (probably 200-400kgs heavier), which means that they probably need bigger t…
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The actual arrangement of cylindrical cells is staggered: https://cdn.motor1.com/images/mgl/XkV66/s1/tesla-model-y-468...
Why not use two size tiers of cylindrical cells, smaller ones to fill in the gaps? With only one size the empty space ratio is the same.
They don’t bother with smaller secondary batteries because the extra manufacturing cost and operational complexity isn’t worth it for a 5%-10% bump in volumetric energy density.
Somewhat off-topic, but maybe someone knows. There's one thing that worries me about EVs: local pollution. So, ICE cars release CO2 + they release local pollutants (NO, CO, etc), particulate matter, that kind of thing. EVs obviously don't directly release CO2 nor do they release those local pollutants. However, EVs are on average much heavier (probably 200-400kgs heavier), which means that they probably need bigger t…
I don't have a specific study but regenerative breaking as used in commercial EVs would mean less particulate from breakpads etc. not more.
The thing is, that's another aspect where I'd naively assume tires are a much larger factor. I'm probably wrong, though.
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The question is reasonable and I'm not sure why it was heavily downvoted, tire wear and road wear depends polynomially on the vehicle weight (I remembered it's the cube, I tried Googling but Google has turned completely fucking useless for anything serious) edit: it's the 4th power for road damage (!): https://www.denenapoints.com/relationship-vehicle-weight-roa...
Tire wear you can just directly calculate from the useful lives of tires on a given car. Search around on Tesla owners' forums to see at what mileage people are replacing their tires. Then you just back it out from diameter x width x tread depth. Teslas come out poorly on this because they are a performance-focussed car with large, soft tires. Some other electrics like the BMW i3 have tiny rock-hard tires that practi…
Even the Model 3? That's more of an economy car, I'd expect it to have practical tires.
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Tire wear you can just directly calculate from the useful lives of tires on a given car. Search around on Tesla owners' forums to see at what mileage people are replacing their tires. Then you just back it out from diameter x width x tread depth. Teslas come out poorly on this because they are a performance-focussed car with large, soft tires. Some other electrics like the BMW i3 have tiny rock-hard tires that practi…
> Teslas come out poorly on this because they are a performance-focussed car with large, soft tires. Even the Model 3? That's more of an economy car, I'd expect it to have practical tires.
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The right time to buy a new car is when your current car doesn't meet your needs. You got your money's worth. Don't feel bad about buying a new one; unless "your needs" are being as frugal as possible.
Why shouldn't you feel bad about buying a new car? Surely the environmental impact of creating such a large piece of machinery must be very significant? I don't care what people do with their money, but let's try to be frugal with our environment.
Without an ability to do a full analysis of all the variables, I made my best guess. I hope it would be the same for a car.
Somewhat off-topic, but maybe someone knows. There's one thing that worries me about EVs: local pollution. So, ICE cars release CO2 + they release local pollutants (NO, CO, etc), particulate matter, that kind of thing. EVs obviously don't directly release CO2 nor do they release those local pollutants. However, EVs are on average much heavier (probably 200-400kgs heavier), which means that they probably need bigger t…
The question is reasonable and I'm not sure why it was heavily downvoted, tire wear and road wear depends polynomially on the vehicle weight (I remembered it's the cube, I tried Googling but Google has turned completely fucking useless for anything serious) edit: it's the 4th power for road damage (!): https://www.denenapoints.com/relationship-vehicle-weight-roa...
To EV fanboys: issues should be discussed, not hidden away because they're not nice or not solved yet.
I think EVs are a great idea, they're great for the environment and personally, I was hoping they'd also be great for air quality. But it seems the air quality part will not happen for quite a long time, until batteries become much lighter, unfortunately.
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> Teslas come out poorly on this because they are a performance-focussed car with large, soft tires. Even the Model 3? That's more of an economy car, I'd expect it to have practical tires.
It depends on the wheel package.
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True, but statistically the average HN user with a beat up car won't be a McDonald's employee buying the only car they can afford, but more likely someone working in tech that's aiming for FIRE or whatever they're calling it and saving a ton of money. Highly unlikely the average HNer can't come up with $1000 for an emergency (nota bene: for sure some can't, that why I didn't say "every HNer").
Phew, as long as we're only having to worry about HNers. That's gotta be what, a whole 1% of the driving population? Seriously, why is an HNer filter being applied?
Can't we be lackadaisical anymore? :-p
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They currently use some of both NiMh and Li-ion. Toyota is notoriously conservative when choosing technologies. My guess is they still use a lot of NiMH because they have proven long-term reliability, more forgiving characteristics in harsh use, and they already have a lot of existing tooling to support them. If there any single car that has made the general public comfortable with very expensive batteries in their c…
All those things are true when comparing NiMH to NiCd but definitely not compared to lithium batteries. There's not a single metric for which you can't find a superior suitable lithium chemistry. Except for one: $Cost Just Toyota doing Toyota things. Also I would strongly disagree on the Prius comment. A lot of "HV battery fault" cars out there back in the day, refurbing them was a pretty good business for a while. T…
Your quote about rollout of the Prius is exactly my point. That opinion was widespread when the Prius was introduced. The reliability of the Prius since then has changed public opinion greatly.