Tesla Pouch Cells

[Buckminster]

Tesla requesting permission to manufacture a small qty.

https://twitter.com/x/status/1658449344003989504

 

[Stretch2727]

Does anyone know the configuration of the 12v LI battery now in the car. Could it be this or for the 48v system?

 

[Artful Dodger]

Does anyone know the configuration of the 12v LI battery now in the car. Could it be this or for the 48v system?

Tesla 12v battery - Proper Care & Feeding | Ingineerix (May 15, 2023)

Spoiler: it's 4S-2P, 6.9 AmpHr made from CATL cells, with it's own BMS. Mostly operates when the contactors are open to the HV traction pack (that's how they power 'sleep' functions to enable a 'wake-up'). Otherwise, the low-voltage system is powered directly from a DC-DC converter connected to the HV pack.

Because of the cell-level voltages listed below, we know this is a Lithium Nickel (NMC) chemistry, and not a Lithium Iron Phospate (LFP) battery cell.

 

[Artful Dodger]

Tesla requesting permission to manufacture a small qty.

https://twitter.com/x/status/1658449344003989504

Yeah, it's not a 'small quantity' if REUTERS reporting is accurate:

Tesla applies to expand Shanghai plant, add pouch battery cell output | Reuters​

​

"An undated public notice said the potential expansion would give the Shanghai Gigafactory the capacity to produce 1.75 million powertrain units annually, up from 1.25 million currently."​

​

That's additional capacity for about 500K bty packs per year, which is about 1 GA line-worth of addtional car production capacity @ 10K/wk. Could this be for phase 1 of Gen3?

Cheers!

 

[JRP3]

Yeah, it's not a 'small quantity' if REUTERS reporting is accurate:

Tesla applies to expand Shanghai plant, add pouch battery cell output | Reuters"An undated public notice said the potential expansion would give the Shanghai Gigafactory the capacity to produce 1.75 million powertrain units annually, up from 1.25 million currently."That's additional capacity for about 500K bty packs per year, which is about 1 GA line-worth of addtional car production capacity @ 10K/wk.

Powertrain units are not batteries. Those are listed separately in the article:

The automaker is also looking for clearance to produce pouch-type battery cells, the notice said, adding that a trial production line would have initial annual capacity to make 20,000-amp-hours of cells, equivalent to the power in a single Model Y battery pack.

 

[Ogre]

CyberQuad packs.

Imknow I’m probably wrong but that’s my guess.

 

[mongo]

The head scratcher is why they need to apply for "Permission" from anyone for such a minor thing.

I expect zoning/ building use. Shanghai has no cell production currently.

 

[Cosmacelf]

It’s almost certainly for R&D testing. Supposedly pouch cells are often used for electrolyte testing.

 

[hitchhiker]

Robots?

 

[Buckminster]

https://twitter.com/x/status/1748895053680951622