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Tesla and Panasonic Collaborate to Develop Next-Generation Battery Cell Technology
- Thread starter dpeilow
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- Tesla Inc.
tdelta1000
Active Member
Now that's a nice business move by Tesla Motors. It assures that Tesla will always have the best battery technology available and it puts Tesla in a position to be able to deliver a potentail 500 mile range battery pack.
Compatible with other cells? So it seems likely they will stick with the 18650 format for a while at least.
Although this seems to contradict the EV-specific aim, it might be relatively easy to take an existing standard cell design and produce an EV variant over the next few years (in time for Bluestar?).
I hope they can use a cell shape which stacks/packs more efficiently but which has added, built-in channels/tubes for coolant. Maybe the channels through the cell could be open holes and the cells are simply threaded onto appropriate tubing which carries the coolant. Should be cheaper and more reliable than each cell having individual connectors with rubber seals.
Of course, you would never be able to mix different cell designs within the same pack, but that situation is true now.
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Tdave
Member
A direct replacement of the 2.9 Ah cells in the current Roadster battery pack with these new 3.1 Ah cells would mean 261 miles range instead of 240 miles range. Every little bit helps.
The cells in the current Roadster battery pack got locked down a while ago and I think those are 2.4 Ah cells. So if that's the case, 3.1 Ah cells would mean a 29% improvement.
Tdave
Member
You're right, not 2.9. So are they using 2.4 or 2.2 Ah cells in current packs? Some posts on the Tesla blogs say 2.2 Ah. TMC forum search is failing me.
Perhaps not. All the 18650s on this page are 45 +/- 1.5 grams.
Cylindrical type | Lithium Ion Batteries | Batteries, Power supplies | Panasonic Industrial Solutions Global
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Tdave
Member
No, but maybe a gram. The 3.4 Ah coming next year will be 2 grams heavier than the current 2.9 Ah, according to Panasonic. With 6831 of them, that amounts to an extra 40 pounds. Not a big deal.
tdelta1000
Active Member
What I took from the news today was the Model S will get this new technology thus put tingTesla right on target of their stated ranges. Also that the S is still a go.
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I asked the question about two years ago on teslafounders and Martin replied that his car had 2.4Ah cells. It was reposted here.
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