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Orange Blooded [2693]
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Tesla's Structural Battery Pack in the Model Y
Apr 8, 2022, 1:48 PM
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I watched the cyber rodeo from the new gigatexas plant down in Austin, which incidentally, is about the most Texas thing I've ever seen. That factory is humongous.
I noticed they are installing new battery packs that also act as a structural component. I'm impressed by the design, but there's an inner voice that is more than a little skeptical about viability and safety of a battery after some wear and tear on the road.
This innovation predates Tesla by at least a few years, but to my knowledge they are the first company to do something with structural cells at scale.
Any EE's here, feel free to weigh in.
https://twitter.com/live_munro/status/1512215223268216833?s=20&t=NppvCGwkB9vNHCiESFDL1w
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Oculus Spirit [81078]
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The further EV manufacturers stray from having easily
Apr 8, 2022, 1:56 PM
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exchangeable batteries is further limiting EV large scale adaptation.
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Orange Blooded [2693]
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Re: The further EV manufacturers stray from having easily
Apr 8, 2022, 2:15 PM
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It's hard to tell from the photos I've seen whether it'd be feasible to swap these batteries after they've lost capacity. Structural packs imply that they are fairly integral to the frame, but it's not clear.
Apparently they are warrantied for eight years / 150,000 miles. Also, based on Model X vehicle history, apparently batteries still have about 90% capacity after 200,000 miles.
For structural batteries I'm curious about potential reduced capacity after enough wear and tear, like stress on the structural load path from simply braking or swerving, or whatever. Seems like you could more easily short circuit a few cells along the way.
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Lot o points [155944]
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Re: The further EV manufacturers stray from having easily
Apr 8, 2022, 2:23 PM
[ in reply to The further EV manufacturers stray from having easily ] |
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I would have agreed at one point, but not so much any more. Quick-exchange batteries solve two problems:
1) Cost effectively replacing end-of-life battery packs.
2) Quick "recharge" of depleted battery packs.
For #1, Tesla has designed their battery packs to have 80% capacity at 200k miles, with ultimate life spans of 300-500k. They're good for 1500 cycles, so if you conservatively figure 200 miles per cycle, that's 300k miles. It begs the questions - what percentage of people keep a car that long? Does anyone expect their ICE vehicle to last much longer than that? If so, is it a significant enough number of people who would walk from electric because of it to matter? If you love your Model 3 and it's still in great shape at that point, is the $12-13k (for a new battery from Tesla---refurbished packs are half of that) cost for a new module that far off a new engine for a modern car?
For #2, Kia and Hyundai are currently leading the pack on recharging. On a level 3 charger (more common than you might think), they go from 10-80% charge (200+ miles of range) in 18 minutes. That's impressive and it's getting to the point where it's close enough to a gas refill, whiz and a soda that a large percentage of the public won't care.
Biggest issues I think are going to be continued growth of the charger network. It feels to me like it would align well with the gas station model....don't make a huge amount on the electricity/gas, but make a killing off the people who invariably come inside and shop for food and drink while recharging/filling up. Seems like once the technology settles enough to be predictable, private industry should start filling the void more.
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All-TigerNet [11640]
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Constant Level 3 use kills the battery as well.
Apr 8, 2022, 9:25 AM
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And there are Level 3 stations that are charging insane amounts. Like $1 per kW-hr.
I doubt we'll see quick change batteries any time soon. So many automakers are going their own routes for EVs. Battery size, arrangement, shape, voltage architecture, etc. all all wildly different.
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Lot o points [155944]
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I don't know who would use constant level 3 though.
Apr 8, 2022, 2:49 PM
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We're talking the occasional road trip for most people, which is when range anxiety (and potential charging inconvenience) kicks in the most.
I don't care if it takes my car 6 hours or 20 minutes to recharge at home each night, but those 4-5 times I drive 360 miles to Greenville every year, it would be nice for my stop on the far side of Knoxville to top off to be 15 minutes instead of 40.
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All-TigerNet [11640]
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There's a couple level 3s by me, and I swear I see the same
Apr 8, 2022, 3:08 PM
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group of tesla's there each week.
I figured if I really manage it well, the Ford Lightning will have a range of 450 miles stopping off at a Level 3 to charge to 80% during the trip.
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Lot o points [155944]
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Did you get/getting the Lightning?
Apr 8, 2022, 3:12 PM
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It's a super slick package for sure. Good friend of mine in Denver is close to being able to order his Rivian that he put a deposit on forever ago. It's a sweet truck, but I think Ford stole a ton of their thunder.
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All-TigerNet [11640]
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I have a Reservation...
Apr 8, 2022, 3:16 PM
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I wasn't able to grab a 2022 (Ford is only building 20,000), but my place in line should get me a spot in the first half of MY2023 orders. 2023 order waves should start this summer.
The Rivian seems pretty nice. They seem to be built much better than Tesla. It will be interesting to see how they weather their recent, and massive, price hikes. But Ford might eat their lunch. Bigger truck, same range, almost as fast, for 5 figures less and a better dealer network? It will be tough for sure.
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All-In [27149]
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Ford Lightning is a gamechanger.
Apr 8, 2022, 3:54 PM
[ in reply to Did you get/getting the Lightning? ] |
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High affordable and highly capable EV truck? Not to mention an established repair network. Jimmy floated the idea of the Fisker Ocean to his wife and her response, in addition to, "I don't trust any car named Fisker," was where to get the thing repaired.
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Oculus Spirit [81078]
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"high affordable"
Apr 8, 2022, 4:05 PM
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We have different definitions of "affordable" for a truck that needs a recharge in 100-150 miles if I'm towing anything.
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All-In [27149]
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How many people who own a truck actually tow
Apr 8, 2022, 4:17 PM
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things that far out of town?
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Lot o points [155944]
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I’m already picturing the Clemson tailgating crowd
Apr 8, 2022, 4:32 PM
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Running 3 flat screens, a microwave, two heaters, and a kegerator off a Lightning all day long on game day and then not leaving the lot till 4am because they had to wait for a borrowed Honda generator to recharge it enough to get to a real charger.
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All-In [27149]
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Obedamus.
Apr 8, 2022, 8:57 PM
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This will happen.
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All-In [27149]
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Your point about how long people keep cars is very
Apr 8, 2022, 3:53 PM
[ in reply to Re: The further EV manufacturers stray from having easily ] |
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understated, and not just for EVs.
Even if your battery is at 80% after idk, 10 or 15 years...car tech is rapidly improving so much that even a five years starts to feel like a relic. For EVs, this may not be much of an issue because at 80% it's still highly usable and depreciation makes the secondary market much more accessible. But what about the soccer moms dropping $100k+ on high-end SUVs? That is a helluva lot of depreciation for something your kids are going to wreck the inside of after years of use, to say nothing of that new one that Samantha down the block has with the seat vibrator and AI voice assistant that listens to all your problems and offers reassuring phrases like, "I hear you." and "You are so right."?
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Orange Blooded [2693]
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some might smell a business opportunity
Apr 8, 2022, 6:26 PM
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the ideal path to upgrade EV's would be like popping mobos/cpus/ram.
Build a third-party supply chain economy, network of techs, and boom.......
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Replies: 15
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