Joku spekuloi [1], että Donutin latausdemoama akku on Ampriuksen akku [2]:
1) reddit
2) amprius
Amprius oli myös messuilla ja nappas vielä palkinnonkin:
www.ces.tech
Just throwing it out here because I didn't see this theory yet. I have checked all around, going through the video of Donut labs, taking out all details that was possible for us to see. What I found is that they match alot with a tech mostly used for drones called Silicon Nanowire. Their test setup was 3 70V machines (they had actually put a sticky note on top of main machine with 70 V 100 A written on it if you look closely, and 1 machine simply is unable to push out that much energy), they used an active cooling plate, the cell markings during CES (125Wh / 315g), and the swelling during the actual charge ( I could see a bit of swelling of the pouch). It seems to me that this is not a new Nanocell or what other people say high capacitor like system invention (it could be a hybrid between the two because of Nordic Nano their Nano printing tech, but I highly doubt it and looks like a stunt to just sell the verge motorcycles or their motors) (besides the Korean paper where they most likely let us believe the 100k charge rate came from did show 418 Wh/kg but actually was 39 Wh/kg with every variable included), but rather a Custom Large-Format Silicon-Nanowire Pouch Cell, where they likely used a technology like the one of Amprius.
Here I will show the data breakdown comparing the battery cell that they showed in their video while charging against some of the known specifications of Amprius their technology which matches almost perfectly.
Specification alignment: The Donut Lab battery cell falls exactly within the manufacturing tolerance of an Amprius High-Power Silicon Nanowire cell. The swelling visible in the video is the physical signature of the Silicon anode expanding as it absorbs Lithium. Donut labs their battery also had rounded corners inside the pouch if you look closely which screams for winding instead of stacking; printing might be possible on these sheets, they use one long strip of anode and cathode, roll them up like a carpet, and then just simply flatten it.
Energy density: The Donut lab sign that they had at CES shows 125Wh / 315g, which calculates to 397 Wh/kg. This matches perfectly with the Amprius high power tech which is rated for 390–400 Wh/kg.
Then for volumetric density: Based on the dimensions relative to the size of the multimeter (yes I actually calculated it that way), the Donut labs cell during their testing is ~1,000 Wh/L. Amprius cells are commercially rated for 800 - >1,000 Wh/L.
Even the charge speed matches: Donut labs showed a 10C (270A) charge rate. Amprius rates their high power cells for 10C pulses or high continuous rates if cooled, which explains the lab setup with their cooling plate below the battery, which they even didn't do properly because the thermometer is directly placed on top of the cooling plate against the side of the battery cell instead of on top of the middle of the battery pouch.
As for the Voltage: The cell calculated to ~4.4 Volts, the video showed around ~4.1 - 4.2, matching the 4 - 4.35V+ high-voltage used by Amprius (this shows why Donut labs said that they were able to tweak the voltage a bit).
1) reddit
2) amprius
Amprius oli myös messuilla ja nappas vielä palkinnonkin:
Amprius 520 Wh/kg cell
CES® is the most powerful tech event in the world — the proving ground for breakthrough technologies and global innovators. This is where brands get business done, meet new partners and where the industry’s sharpest minds take the stage to unveil their latest releases and boldest breakthroughs...
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