04-14-2022, 12:33 PM | #89 | |||
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04-14-2022, 01:08 PM | #90 | |||
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Not having a top buffer is purely a preference thing; you're talking about a 10% top buffer which simply does not exist in any EV today, just so it compensates for the natural degradation. Battery degradation is real, we should be mindful of it, not try to hide it, it's part of any EV ownership. Cheers! |
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04-15-2022, 09:29 AM | #91 | |
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The numbers I used were to simply keep the math easy when I would then give an estimated range figure to go along with it. I didn't say that they were the accurate numbers for any car on the market. |
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04-15-2022, 09:46 AM | #92 |
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Not quite the same, but I have a few 16kwh li-ion home batteries from LG Chem that are probably very similar to the cells they use in EVs. These packs are rated for 10 years or 54Mwh of use, which is 3,750 full discharges (stopping at 10%). The warranty says it should have at least 70% capacity after those ten years of torture. I don't discharge nearly as often or deeply with my EV as my home batteries do nightly.
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04-15-2022, 09:47 AM | #93 | |||
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Knowing that charging to 100% would stress the pack is enough for me not to do it unless I really needed the range. I like to take care of my valuable possessions as that will make them last longer, have fewer issues, and ensures that when I sell the vehicle the buyer is getting one that has been cared for and is in excellent condition. Quote:
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04-15-2022, 10:33 AM | #94 | ||||
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04-15-2022, 10:35 AM | #95 | |
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04-15-2022, 12:13 PM | #96 | |||||
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Knowing that charging to 100% would stress the pack is enough for me not to do it unless I really needed the range. I like to take care of my valuable possessions as that will make them last longer, have fewer issues, and ensures that when I sell the vehicle the buyer is getting one that has been cared for and is in excellent condition. How long would it take for range to drop that substantially though? If I sold it in 4-5 years, would there be a noticeable decline, or does that hit around 8-10? I am asking since, other than 80%-100% takes a lot longer charge time, there doesn't seem to be a standard line of top end charge recommendations amongst companies. I will set the top end to whatever the owner's manual says, but was curious as to why a shallow charging cycle to 100% is worse for the battery than constantly charging to 80%.
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04-15-2022, 12:58 PM | #97 | |
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Since I'm planning to keep the i4 for longer than 3 years (I always plan to though) I started looking into battery degradation for BMW specifically half a year ago, and I found several sources about i3 at about 70,000 miles (Which is around how much I'm planning on driving it for 3 years, I'm guessing 55-60,000 miles for me) . From my research I found there to be anywhere between sub 2% to 5% degradation. I'm unable to find the 7 year article, I could've mixed numbers, I stand corrected. As far as the others: - https://insideevs.com/news/334057/bm...than-expected/ - 4% loss after 70,000 miles - https://evcharging.enelx.com/resourc...r-battery-life - individual owner report after 70,000 miles less than 2% loss - https://thedriven.io/2021/08/30/ev-g...mal-fuel-cost/ - individual owner report 4% after 80,000 miles From BMW owner's perspective, the battery degradation seems to be low compared to others. |
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04-15-2022, 02:20 PM | #98 | |
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That is one of the functions of the buffer... that few kWh you would lose almost right away would annoy most people, so some of that buffer is used to hide that. Without knowing which EVs you have experience with, I'm going to bet that they all used buffers like this and never gave you access to the full capacity and masked that initial drop. Several EV focused youtubers (Bjorn, Kyle from out of spec reviews) have mentioned it and specified something like 6 months or so but I am not going to try and hunt down videos where they have talked about it. In essence, it is nothing to be concerned with, but it does exist. Nowadays, most if not all companies just take measures to avoid it being noticeable by their customers. |
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04-15-2022, 06:13 PM | #99 | |
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As an aside, I have a few friends who now classify as long time (>6yrs) Model S&X owners. They report battery degradation in the range of 15-20% |
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04-15-2022, 08:29 PM | #100 |
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TheIX: Question for you.
I didn't get a chance to test this out, but can you switch from drive to reverse at low speeds (~3 mph) without hitting the brake? This is a pretty neat feature on Teslas (and probably other EVs) and makes executing 3 point turns a lot smoother. |
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04-21-2022, 04:23 PM | #101 | |
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TheIX , how's the efficiency with the current miles you have? Thanks. |
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04-21-2022, 04:36 PM | #102 | ||
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Temps here have been fairly cold ranging in the high 20s to mid 40s |
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04-22-2022, 09:25 AM | #103 |
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That's pretty bad overall, but reasonable considering the temps. No such problems here in Arizona. Suspect we will get 300+ mile range with our M60 event hough it's estimated EPA rating is 280 miles. I always get better than EPA on my EVs because I drive conservatively and usually in balmy weather. Also helps the battery to degrade less over time and better for the car overall.
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04-22-2022, 09:47 AM | #105 | |
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In Utah we are at about 5000 feet. This means the atmosphere is about 14% less dense than at sea level. Bad for ICE cars, they make less power. But good for EVs fighting air resistance. It does seem to make a small but measurable difference. When comparing notes on the e-tron forums I often have some of the best range numbers. For an EPA rated 222 mile car, once I went over 220 miles on a single charge and had 20 miles left on the meter. Last summer we did a 600 mile round trip to southern Utah and got 2.54 miles per kWh overall, where most e-tron owners are reporting 2.2-2.4. In general I would say I get about the EPA rating, but I'm able to get it at full freeway speeds of 70-80mph rather than the 60mph or whatever they say the rating is at. |
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04-23-2022, 10:27 AM | #106 | |
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04-24-2022, 09:52 AM | #108 |
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72% of predicted maximum - which is not bad considering temp and charging limit of 80%. First time I really looked at the dash though - what's up with the 140 mph limit? And the 140 mi on the center range graphic means....?
Last edited by Paladin1; 04-24-2022 at 09:59 AM.. |
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04-24-2022, 10:59 AM | #109 |
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The centre graphic show minimum range, predicted range and highest possible range if driven very efficiently.
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04-24-2022, 11:34 AM | #110 |
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