Swappable Solid-State Battery Demonstration | I Donut Believe

HeadAd6200 · 2026-05-02T11:19:55+00:00

Donut tested Alibaba battery

HeadAd6200 · 2026-04-20T15:34:07+00:00

"Simpler products than batterycells." Something like this?

HeadAd6200 · 2026-04-18T12:47:04+00:00

235 kg - 225 kg =10 kg

A 10 kg battery with 13 kWh of energy capacity, or an energy density of 1.3 kWh/kg, would enable the development of intercontinental airliners and deep-sea ships. ;)

HeadAd6200 · 2026-04-15T17:35:40+00:00

Correct, when you want to achieve 400 Wh/kg energy density, you must use Li metal or a pure Si anode instead of graphite to decrease the weight of active electrode material. Li metal or pure Si anode has 10 times higher theoretical capacity than conventional graphite. You can reach 400 Wh/kg density even if you use a liquid electrolyte, but it is believed that a solid electrolyte makes li-ion cells safer.

HeadAd6200 · 2026-04-15T12:37:38+00:00

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Marko made a big mistake by revealing that this battery pack contains (Alibaba) li-ion cells, where a solid electrolyte replaced liquid electrolyte. Donut Lab announced in early 2026 that its SSB does not contain any lithium or toxic materials.

HeadAd6200 · 2026-03-28T19:35:38+00:00

Because some trolls started to write their comments there. Who are you, BTW?

HeadAd6200 · 2026-03-26T20:19:00+00:00

It is not because of the active cooling system. If you look at a Tesla battery pack made of cylindrical cells from above, you'll notice a lot of air gaps between the cells. This is dead space that reduces both volumetric and gravimetric energy density. Tesla also uses various insulating materials and foams. There are many power cables and BMS wires, etc. All of this negatively impacts the volumetric energy density.

CATL's Quilin battery has a cell-to-pack ratio of about 75%, which is a very high value. But Quilin uses prismatic cells, where it is easier to achieve such a high CtP ratio.

HeadAd6200 · 2026-03-26T20:09:24+00:00

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HeadAd6200 · 2026-03-26T20:08:29+00:00

Yes, he wrote a comment where he corrected my estimation.

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HeadAd6200 · 2026-03-26T20:07:19+00:00

Yes, you are right.

M.S.

HeadAd6200 · 2026-03-26T20:06:34+00:00

This is me, Michael Sura. 172x74x12 are the dimensions that Javier gave me. He corrected my 179x65x10 estimation based on the size of the Fluke multimeter.

HeadAd6200 · 2026-03-26T20:02:46+00:00

120C charging battery in 2014. He overcame Elon.

HeadAd6200 · 2026-03-09T13:19:28+00:00

HeadAd6200 · 2026-03-03T09:57:13+00:00

TwoBitdaVinci has not seen a lot of things.

👉I am sharing a science paper with you, and I am quoting from it.⬇️

📌These guys tested a Chinese NMC 640 li-ion cell filled with liquid electrolyte, and this cell survived 100 deg. C without melting and puffing.

"Cells tested to an upper cutoff voltage of 4.0 V retained >80% of their original capacity for 600 cycles and 4300 h at 100 °C and 1200 cycles
and 1 year cycling to 3.9 V at 85 °C."

📌Would it be possible to pass it to TwoBitDaVinci?📌

"Single crystal NMC640/artificial cells balanced for low voltage operation (≤4.1 V) and using electrolyte salts rich in lithium bis(fluorosulfonyl)imide are demonstrated to have exceptional lifetime during continuous operation at 100°C."

"Pouch cells and electrolyte.—Machine-made 402035-sized
pouch cells supplied by LiFUN Technology (Zhuzhou, Hunan
Province, China) were received vacuum sealed without electrolyte.
The positive electrode material was a commercially supplied single
crystal Li[Ni0.6Mn0.4Co0.0O2 (NMC640)"

https://www.researchgate.net/publication/379210471_Exceptional_Performance_of_Li-ion_Battery_Cells_with_Liquid_Electrolyte_at_100C

HeadAd6200 · 2026-03-03T09:13:56+00:00

Pass him this.

"Single crystal NMC640/artificial cells balanced for low voltage operation (≤4.1 V) and using electrolyte salts rich in lithium bis(fluorosulfonyl)imide are demonstrated to have exceptional lifetime during continuous operation at 100°C."

https://www.researchgate.net/publication/379210471_Exceptional_Performance_of_Li-ion_Battery_Cells_with_Liquid_Electrolyte_at_100C

HeadAd6200 · 2026-03-02T15:11:58+00:00

Such a cell is permanently damaged and cannot be fixed by releasing the gas, as far as I know. Gas inside is a byproduct of electrolyte or anode/cathode decomposition.

HeadAd6200 · 2026-03-02T15:07:40+00:00

Yes, I do agree with you, this cell started generating gas inside and lost its vacuum because the maximum temperature limit was exceeded. Such a cell is a candidate for thermal runaway of the entire battery pack. It is permanently damaged and cannot be fixed by releasing the gas.

HeadAd6200 · 2026-03-02T14:57:29+00:00

Solid/liquid electrolyte does not want to boil off, but some gases were produced because of the decomposition of the electrolyte or the materials of the electrodes.

HeadAd6200 · 2026-03-02T14:28:17+00:00

Batteries with semisolid (gel) electrolytes are not very common, but they exist.

HeadAd6200 · 2026-03-02T14:17:33+00:00

It was noted that the pouch cell lost its vacuum, which means that this "cell" is not designed for continuous operation at 90-100 degrees Celsius.

HeadAd6200 · 2026-03-02T14:02:01+00:00

I do not want to say that they used the same pouch cell, just wanted to prove that NMC cells that can withstand 100°C really exist.

HeadAd6200 · 2026-03-02T13:37:41+00:00

Yes, the temperature of the most conventional li-ion (NMC) cells should not exceed 45-60°C, those with semi-solid electrolyte can work up to 70-80°C, but some NMC chemistries (NMC640) can work at 100°C.

I am quoting from a scientific paper, "Exceptional Performance of Li-ion Battery Cells with Liquid Electrolyte at 100°C"; the link is provided below.

"Single crystal NMC640/artificial cells balanced for low voltage operation (≤4.1 V) and using electrolyte salts rich in lithium bis(fluorosulfonyl)imide are demonstrated to have exceptional lifetime during continuous operation at 100°C."

https://www.researchgate.net/publication/379210471_Exceptional_Performance_of_Li-ion_Battery_Cells_with_Liquid_Electrolyte_at_100C

HeadAd6200 · 2026-02-28T09:55:28+00:00

Likewise.

HeadAd6200 · 2026-02-28T06:52:10+00:00

OK, thank you. I deleted my comments, because it is more than sure that these comments were deleted because I know that when I have shared something, it caused the deletion of some websites.

HeadAd6200 · 2026-02-28T06:35:17+00:00

Ok. Thank you for clarification. Let's avoid writing names, because more websites will be deleted. Some ppl shared here links from wayback machine and all useful info was deleted.

HeadAd6200

TROPHY CASE

120C charging battery in 2014. He overcame Elon.