To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Tesla cell size
On 13 Apr 2017 at 22:04, Michael Ross via EV wrote:
> A cylinder only has to be oriented for polarity, it
> can have any radial orientation.
We had a rather similar discussion here many years ago (20?) about Optima
On 13 Apr 2017 at 22:04, Michael Ross via EV wrote:
> A cylinder only has to be oriented for polarity, it
> can have any radial orientation.
We had a rather similar discussion here many years ago (20?) about Optima
lead batteries, which used (and still use) cylindrical cells.
This thread has
Från: EV <ev-boun...@lists.evdl.org> för Michael Ross via EV <ev@lists.evdl.org>
Skickat: den 14 april 2017 04:04
Till: Electric Vehicle Discussion List; Mark Hanson
Ämne: Re: [EVDL] Tesla cell size
> Regarding fuses, if you check out some images of pack teardowns you ca
The larger cell allows more cooling surface. I think Tesla has optimized
for power density choosing the slightly larger size. Also optimized for
manufacturing efficiency. A cylinder only has to be oriented for polarity,
it can have any radial orientation.
Regarding fuses, if you check out some
>
> Thanks Mike
> It looks like their 18650 cells have only grown slightly. Guess you can't
> argue with success. I remember when they were starting in California and I
> told a Tesla salesman that that's 6800 points of failure and he said that's
> 6800 points of redundancy. I've always
Like ion cells change volume a significant amount as they charge and
discharge. The cylindrical format is really structurally better in this
respect- each cell can handle the stress and the pack doesn't have to be
designed to take it. Compare to pouch cells which end up in a press to keep
> On Apr 13, 2017, at 3:32 AM, - - via EV wrote:
> I haven't heard of any reliability problems related to the cells or their
> interconnects.
On the first few units, assembled by hand in Asia, they had a lot of problems,
which was what drove the development of the robotic
See the following for details:
https://www.tesla.com/blog/battery-cell-production-begins-gigafactory
I agree that Tesla is the only auto manufacturer using the cylindrical cells,
but they are used by the millions in laptops, so the technology is well
established.
Using the cylindrical cells
On 2017-04-12 08:45 AM, Mark Hanson via EV wrote:
Is tesla still using 6800 or so of 18650 itty bitty cells in their on road
vehicles like the S and model 3? Do they use these small cells in their Tesla
Wall home UPS packs as well? I wonder if they'll continue these small cells at
their
Is tesla still using 6800 or so of 18650 itty bitty cells in their on road
vehicles like the S and model 3? Do they use these small cells in their Tesla
Wall home UPS packs as well? I wonder if they'll continue these small cells at
their giga factory in Reno since *no* other manufacturer is
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