Tesla's new 4680 - We're gonna need a bigger flashlight

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manithree
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Dunno if this is the first, but it’s the first I’ve seen:

https://electrek.co/2021/09/01/storedot-tesla-like-4680-battery-cells-ch...
No link to order them online, tho Silly

Quote:
Electrek‘s take

I like to always be careful with these types of announcements and I stay skeptical.

StoreDot looks like a serious company and I am sure that they did produce such a cell prototype, but I don’t know about the claim of charging in 10 minutes.

Photon Master
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Sweet! Can’t wait for a 46800 powered million lumen light

zerodish
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You must realize 21700 and 4680 batteries were designed to work in packs. With a flashlight the entire outer surface can be used as a heat sink. So a flashlight can use a bigger battery than an automobile. I’m going to wait for the 6080 or the 60160 battery.

manithree
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zerodish wrote:
You must realize 21700 and 4680 batteries were designed to work in packs. With a flashlight the entire outer surface can be used as a heat sink. So a flashlight can use a bigger battery than an automobile. I’m going to wait for the 6080 or the 60160 battery.

Meh. 4680 is already pushing the limits of carry-able flashlight size. Kind of a winter or camping light for me, already. 21700 is my current carry favorite. 4680 is interesting to me because it will allow higher capacity and power in soda can lights. I’m not really interested in anything significantly larger than that (no, I don’t own or plan to own a BLF GT).

zerodish
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The big news here is the construction not the size. They put multiple electrodes along the sides instead of one on each end. This shortens the path electricity has to flow and lowers the internal resistance. Lower internal resistance means less heat produced charging and discharging. This should work with other chemistries such as NiMh.

Hoop
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Carry-able is anything you can carry. A 46800 light is definitely able to be carried. Pocket-able? Well that’s a different term entirely. EDC pocket-able, pants pocket-able, is much different from winter jacket pocket-able. Winter jacket pocket-able is more like holster-able, although a holstered light can be very long, like a 3D Maglite. You can’t put a 3D Maglite in your jacket pocket. You can stick it down your pants though. You might even make some new friends.

What is the limit of Carry-able? I’ve held a garbage can lid in front of me and thought “this is reasonable,” but ultimately I chose a different profession.

I have set the upper limit to the lights I build in my imagination, in terms of head diameter, to about 20 inches / 50 centimeters. As for weight, 20LB / 9KG may be pushing the limits of what is comfortable to carry for a moderate duration using a padded shoulder strap. Golf bag shoulder harnesses that strap over both shoulders would enable 30-35LB / 13-16KG to be carried comfortably, as would a backpack setup.

manithree
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Hoop wrote:
Carry-able is anything you can carry. A 46800 light is definitely able to be carried. Pocket-able? Well that’s a different term entirely. EDC pocket-able, pants pocket-able, is much different from winter jacket pocket-able. Winter jacket pocket-able is more like holster-able, although a holstered light can be very long, like a 3D Maglite. You can’t put a 3D Maglite in your jacket pocket. You can stick it down your pants though. You might even make some new friends.

What is the limit of Carry-able? I’ve held a garbage can lid in front of me and thought “this is reasonable,” but ultimately I chose a different profession.

I have set the upper limit to the lights I build in my imagination, in terms of head diameter, to about 20 inches / 50 centimeters. As for weight, 20LB / 9KG may be pushing the limits of what is comfortable to carry for a moderate duration using a padded shoulder strap. Golf bag shoulder harnesses that strap over both shoulders would enable 30-35LB / 13-16KG to be carried comfortably, as would a backpack setup.

That’s why I said “for me.”

Lightbringer
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Take your Q8, DC7, SD01, etc., and just bore it out a few mm, and it’ll fit a 46800 just fine. So we’re not talking about holding a steam-iron in your hands or anything…

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elendur
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Was this new cell not also designed to also provide some structural strength to the battery pack?

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