[Rumor] new 40700 cell size

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master-of-disaster
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[Rumor] new 40700 cell size

Tesla is rumored to start production of 40700-size Li-Ion cells for their battery packs in the near term.
One of those would be extremely similar in size to 3×18650, while offering roughly twice the capacity, and a significant safety benefit (no possibility of cell mismatch).

Bright times ahead!

hIKARInoob
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40 mm diameter…. Well well well, that’s just perfect for flashlights… Evil

Th558
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If it can really offer twice the capacity then that’d be amazing. Would be great for smaller lights like the MF01S.

Where did you hear this rumor? Can’t find anything online.

raccoon city
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Yeah, when I google

tesla 40700

I don't get any relevant hits.

Henk4U2
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Have not heard that rumor before, but I won’t say it’s not true.

Before the model 3 was introduced, Tesla used 18650 cells. Up to 8,000+ per car.
But they realised there are formats with a higher energy density per cm³.
Initially they went for the 20700 strategy, a lot of battery manufacturers joined that.
These seems to have become the new standard cell for E-bycicles.
But prior to the launch of the model 3, Elon Musk himself (?) made a last calculation.
Not just in view of the energy-density, but also in view of the cooling properties needed.
And ultimately he choose the 21700 format, starting with model 3.
Surpassing the much loved 26650 format, which never was a champion in energy density.

I think it is highly improbable the new 21700 strategy is abandoned shortly after it’s introduction.
Unless ……. Panasonic & Co came up with an altogether different chemistry and better cooling.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

MoreLumens
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Henk4U2 wrote:
I think it is highly improbable the new 21700 strategy is abandoned shortly after it’s introduction. Unless ……. Panasonic & Co came up with an altogether different chemistry and better cooling.

Not long for this:

https://www.teslarati.com/tesla-battery-day-doomsday-legacy-carmakers-el...

Quote:
There are rumors out of China claiming that Tesla may come up with a battery that combines the best traits of Maxwell’s supercapacitors and dry electrode technologies. This could mean batteries that could charge faster, pack more energy density, and last longer.
ZoomieFan
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Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88 4/5, LiitoKala: 3x100 3/5, 2x202 3/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

master-of-disaster
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Th558 wrote:
If it can really offer twice the capacity then that’d be amazing. Would be great for smaller lights like the MF01S.

Where did you hear this rumor? Can’t find anything online.


A youtube video claimed that it was started by tesmanian.com, but I can’t find anything on there. The exact wording was ‘ increase cell diameter to 1.57” ‘.

EDIT: found it – https://www.tesmanian.com/blogs/tesmanian-blog/tesla-next-gen-battery-wi...

Henk4U2 wrote:
Not just in view of the energy-density, but also in view of the cooling properties needed.
And ultimately he choose the 21700 format, starting with model 3.
Surpassing the much loved 26650 format, which never was a champion in energy density.

I think it is highly improbable the new 21700 strategy is abandoned shortly after it’s introduction.
Unless ……. Panasonic & Co came up with an altogether different chemistry and better cooling.


On the cooling side, the new cells are supposed to have significantly lower internal resistance due to a new electrode manufacturing process, and so would need less cooling.

There is no talk about abandoning the partnership with Panasonic. If tesla wants to scale up production of the current model 3, new model Y, soon to come semi truck and cyber truck as well as the stationary storage division per plan they need to increase their battery supply by orders of magnitude. Since that kind of supply doesn’t exist, they are attempting to start their own production in addition to what they can source from Panasonic, Samsung SDI, LG chem and CATL.

alpg88
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makes sense, fewer cells, simpler wiring, simpler bms, lower cost. increased reliability,

hank
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Oboy. Back to the long, heavy flashlight.
I bet M@g sues over the form factor.

Couchmaster
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https://www.teslarati.com/tesla-battery-day-doomsday-legacy-carmakers-electric/

Well, at least it explains Teslas recent insane stock movement where it went from overpriced at $300 a share to EXTREMELY overpriced at $900 a share (currently $741 a share still valuing the company significantly more than Ford and GM). Beyond electric cars, capable scaled up storage batteries could and likely would be used by everyone in the world to store wind and solar power in an attempt to move away from carbon sources.

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.

alpg88
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mag will not fit 40mm cell, D tube id is a bit less than 35mm,. boring out is also not an option, due to o ring seats,

id30209
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Unless we are all moving to 4D Maglites and BLF GT as EDC, this will not survive in our EDC life

 

WTB Titanium 4sevens 2xAA tube

sb56637
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raccoon city wrote:

Yeah, when I google


tesla 40700


I don’t get any relevant hits.

I did. Innocent


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alpg88
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our edc’s are safe, 18650\350 are still around

EasyB
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Great, another reason to buy more lights. Facepalm

40700 cell has 3.6x the volume of a 21700 so could have approximately 3.6×4.8Ah=17.3Ah.

master-of-disaster
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EasyB wrote:
Great, another reason to buy more lights. Facepalm

If they exist, these cells will not be going to the consumer market. It’s possible, but not guaranteed that other manufacturers will copy the form factor.
So don’t worry for now Wink
bassoverflow
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An SP36 with a 40700?! YES PLEASE!!

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EasyB wrote:
Great, another reason to buy more lights. Facepalm

40700 cell has 3.6x the volume of a 21700 so could have approximately 3.6×4.8Ah=17.3Ah.


Which is more than 4*18650 and close to 4*21700.

If this cells shows up, the current pop can lights will quickly become obsolete.

hIKARInoob
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sb56637 wrote:
raccoon city wrote:

Yeah, when I google


tesla 40700


I don’t get any relevant hits.

I did. Innocent



And now we wait until Elon Musk googles to discover this thread, and he’ll be like hey 40700… why not? And this is how we get what we want! Big Smile

SKV89
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Wow I wish this is true. Im imagining the idea of someone manufacturing a light with four of these in series. You can run 10k+ lumens for practically unlimited runtime!

Even the idea of a ROT66, D18, BLF LT1 with USB-C charge and powerbank would be real sweet

sb56637
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hIKARInoob wrote:

And now we wait until Elon Musk googles to discover this thread, and he’ll be like hey 40700… why not? And this is how we get what we want! Big Smile


My thoughts exactly! Thumbs Up Big Smile

Budget Light Forum ...where Frugal meets with Flashlight!

bilakos10
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Imagine unscrewing your flashlight and taking an 40700 out of it.
Most of your friends would think you're playing a joke on them Silly

samgalax
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Think in the price of those 40700…

50$ each???

Please SUBSCRIBE to my youtube channel (flashlights, electronic gadgets and various stuff..)

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Lexel
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then find a cheap charger that can charge 2 or 4 of those simultaniously with like 15A each

samgalax
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Think in the explosion and fire that could occur if something goes wrong with just one of them XD

Please SUBSCRIBE to my youtube channel (flashlights, electronic gadgets and various stuff..)

https://www.youtube.com/channel/UCCF3RcoQ3Ff05Cr4-Gg5qAw

I am a beginner. So please help me to make the channel "grow up"

Thanks!!

alpg88
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there are 32650 cells out there, very few thou, their capacity rated at 8ah max, but they are not that popular , and those do fit in D size lights

djozz
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For my first gen. ROT66 with battery carrier this could be an almost direct fit

Lexel
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djozz wrote:
For my first gen. ROT66 with battery carrier this could be an almost direct fit

the question is the voltage sag of such a battery, it could literally blast any DD LEDs with lower forward voltage like SST20, Nichia 219C, XPG3

richbuff
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8 x 40mm should be good for Imalent MS36-90.2

Time to start working out my masseter (even more than I already do) for the next big things in mouth hold lights.

Because I like big lights, my flashlightical views lean heavily toward both the extreme bright and the extreme heft.

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