This horseshit again? Physical product available for independent analysis, or it didnāt happen.
Itās not like the Chinese are famous for lying about the specs on things they manufacture or anything. Every week we hear about some Chinese company poised to ārevolutionizeā the EV with pie-in-the-sky range figures and yet the market continues to remain resolutely un-revolutionized.
And as usual, this article harps on ārangeā as if thatās not an easily fudged figure. The real numbers we need to see are watts per volume, or watts per mass. And number of charge cycles tolerated, and how many before it loses what percentage of capacity. Any idiot can claim to make a 1,300 mile, 2,000 mile, 5,000 mile, 1,000,000 mile battery pack ā just make the pack bigger, or the vehicle lighter, or both. That tells us nothing meaningful whatsoever about the battery chemistry itself. Advertising us what hypothetical ranges someone thinks a pack made of these ācouldā build is meaningless. We could build a 1300 mile battery pack right now with LiFePo cells if we wanted to, via the simple expedient of filling a dump truck with the things.
Well, Toyota seems to be promising something around 700-800 miles range with solid state lithium battery tech, but as you say, the proof is in the pudding, and the pudding isnāt ready yet.
Not Toyotas first time either Toyota has said their solid state batteries are just around the corner.
http://www.electric-vehiclenews.com/2010/12/toyota-announces-4-layer-all-solid.html?m=1
The real numbers we need to see are watts per volume, or watts per mass
You have to chase it down, following the link to electrek.co, but then it says: āthe prototype cells house an energy density of 720 Wh/kgā
(of course, Iām just stating what is claimed, no idea how true)
Youāre right, I didnāt see it! I just saw a bunch of chinese writings, which I cannot read, so didnāt bother trying to read even the only thing I could š
If thatās true, 1300 mile range isnāt the big deal. Going much over 400mi is pointless if we build proper charging infrastructure. Use wh/kg advancements to reduce weight, nor increase range.
The big thing is that we can build fully electric airplanes with that kind of wh/kg.
Big if, though. Batteries have been improving by 5-8% per year, and while weāre not close to theoretical limits yet, this would represent an unprecedented leap all at once. That claim needs more to back it up than a press release.
Battery density has been improving steadily for the last three decades.
Battery costs keep falling while quality rises. As volumes increased, battery costs plummeted and energy density ā a key metric of a batteryās quality ā rose steadily. Over the past 30 years, battery costs have fallen by a dramatic 99 percent; meanwhile, the density of top-tier cells has risen fivefold
ā¦
With regards to anodes, a number of chemistry changes have the potential to improve energy density (watt-hour per kilogram, or Wh/kg). For example, silicon can be used to replace all or some of the graphite in the anode in order to make it lighter and thus increase the energy density. Silicon-doped graphite already entered the market a few years ago, and now around 30% of anodes contain silicon. Another option is innovative lithium metal anodes, which could yield even greater energy density when they become commercially available.
Whatās more, the Chinese market is both the leading producer and consumer of battery technology. So its weird to reflexively doubt that a Chinese firm would release a new higher-efficiency battery design.
Given that this is a prototype, its entirely unclear if the model is cost-efficient to mass manufacture or efficiently scalable based on available resources. But Iām hard pressed to discount the claim on its face simply because its got āChinaā in the headline.
Racist see China did something good and have to go out of their way to shit on China.
Exactly. Itās like an article I saw about some new internet tech that was āX times faster than broadbandā. Broadband is a type of transmission using multiple frequency carrier waves to transmit data. It aināt a speed.
Wh/kg or yes maybe volume Wh/cm^3ā¦
The only other thing Iād care about it charge speed. Maybe it doesnāt last as long but I can fully charge in 10 seconds? Yeah Iām interested. Hell Iāve never had a car yet get the estimated miles per gallon on the sticker. Itās all bistromathics as far as Iām concerned.
