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Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

donutlab.com

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Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#41
> Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

This is damn impressive. I suppose all the makers of military drones are lining up at the factory already. I mean, electric bikes are fine, but who has the most burning need to increase range and payload?..

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#42

What exactly makes them solid state? If they mean no water, wouldn't that make all li-ion batteries solid state when compared to lead acid batteries?

Normal lithium-ion batteries have a liquid electrolyte. It's not water, but some carbohydrate. During draining and charging, ions travel between the electrodes through the electrolyte.

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#43
post #24

From the donutlab page: > It can be charged to full in just five minutes without limiting charging to 80%, and supports full discharge safely, repeatedly, and reliably. From the motorcycle youtube video[1]: > delivers up to 370 miles (600 km) of range and adds up to 186 miles (300 km) in under 10 minutes One is claiming 100% in 5 minutes, and the other is claiming ~50% in 10 minutes. Why are their claims so different…

To charge the average Tesla in 5 minutes you need about 1MW and cables as thick as a forearm.

1 MW chargers don't look any bigger than standard chargers.

https://insideevs.com/news/761403/byd-thousands-megawatt-cha...

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#44
post #33
post #6

Earlier quoted context omitted.

Agreed. But you can supposedly book a test ride on a Verge motorcycle with this battery.[1] Verge has three stores in California, two of which are in Silicon Valley. Base price $35,000 with the good battery. Solid state batteries have been working for a while now, but they're still far too expensive. Mercedes has one demo car. Ducati has one demo motorcycle. Maybe they just decided to accept the high cost and sell a…

Yeah, I’m wondering if it could be a Tesla strategy of starting with the something imperfect but niche. If the product is on the market and you can buy one and walk out the door, I feel like claims can easily be validated or invalidated with a tear down.

Not even a teardown. Just a few charge + discharge cycles, measuring the energy.

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#45
post #43
post #24

Earlier quoted context omitted.

To charge the average Tesla in 5 minutes you need about 1MW and cables as thick as a forearm.

1 MW chargers don't look any bigger than standard chargers. https://insideevs.com/news/761403/byd-thousands-megawatt-cha...

The thickness of the cables is often due to their water cooling. Transferring 1 MW at 99.9% efficiency means 1kW escaping as heat.

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#46
post #41

> Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density This is damn impressive. I suppose all the makers of military drones are lining up at the factory already. I mean, electric bikes are fine, but who has the most burning need to increase range and payload?..

i don't see them mentioning of price and C-rating. Suppose their C-rating is sufficient. Current widely available cheap batteries are almost 300Wh/kg. So, on a 3 kg drone with up to 3 kg payload (say RPG-7 single shaped charge warhead) with say 30 min flight time the new battery will give you 10 min additional flight time. At what price? If the price results in having only one 40 min drone instead of 2 30 min drones, then in the current war, only say 10% drones would need to be with new batteries, while it would be most effective to have the rest with the old batteries as the current war seems to be about horizontal scaling.

Overall - their page sounds like a revolution in battery industry as they hit all the points - durability, capacity/weight, fast charging, etc. It is like Musk should just close his GigaFactory. I mean, i would like such a revolutionary development as in particular it would mean we'll soon get personal VTOLs (where price aspect is less important than in the case of drones mentioned above) ...

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#47
post #30
post #3

I'm very skeptical of any company that just 'pops up' and makes a bunch of claims that will shake up the industry. I doubt they'd sell to endusers, but not having any partnerships with established brands with sales figures is a big red flag. No mention of manufacturing capabilities either so I think it's just hype (or worse a rug pull for early investors)

if you look at the history of the lithium ion battery [1], this is exactly what happened, except from a single man. none of the existing manufacturers could stomach the shift to something new, except for sony, which needed a better battery for their camcorder, eventually resulting in a nobel prize. [1] https://youtu.be/AGglJehON5g

No company involved in lithium ion batteries just popped up out of nowhere.

Whittingham worked for ExxonMobil. Akira Yoshino worked at a joint venture of Toshiba and Asahi Kasei. And Yoshio Nishi worked at Sony.

They were all giant well-established companies.

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#48
One of the things I haven't seen discussed yet in the comments is this claim:

Clay-like design freedom

They're claiming this not only can fit custom geometries, but can be part of the structure itself. Would love to see what they're building this out of. I expect we'll see some people dissecting the verve cycle batteries soon enough.

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#49
post #8

Earlier quoted context omitted.

Um... Did nobody see the Verge motorbike which is now shipping as standard with this battery? And the three companies which are also deploying the new battery tech? If this is a scam, it's definitely a very very sophisticated one.

I don't know about a scam, but the EV skateboard they're using has been available for other companies to use for a few years, while the other two companies share the same leadership as Donut/Verge and appear to be founded within the last few months. The battery may be great, but the multiple company launch seems a bit of a marketing gimmick.

How would you do it, instead?

Re: Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density

#50
If true, would have massive geopolitical implications.

1) China has gone all in on batteries. A competitor from Finland would be shocking. Scale is the real issue.

2) Luckily Finland hates Russia so this probably can't be used for Russian drones

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