R2 / R3 battery pack photos from RJ

[Katsudon]

Rivian R2 / R3 battery pack pics posted by RJ.

Specs:

• Three large modules. 256 cells each.​

• 768 cells per pack​

• Battery pack is structural​

"Our R2 battery pack is made up of three large modules that have 256 cells each for a total of 768 cells per pack. The pack is a structural part of the body and the top of the pack is also a portion of the floor of the vehicle. I love how this type of part consolidation demonstrates how our teams work closely together. "

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[DuoRivians]

If this pack design ever makes it to the R1 line up, perhaps I should wait on the quad max

 

[RivianRiverRat]

seems to confirm the speculation from this year old article
Rivian's New Battery Cell Could Be Even Better Than Tesla's

" We don't know the exact specs of these new 4695 cells, but we can do a little bit of guestimation about the pack's specs based on images Rivian showed us at the reveal.

Zooming in on the pack, it appears to consist of 3 large modules separated by heavy internal frame rails. Each module is 34 cells wide by 8 deep, for a total content of 272 cells. If we're talking lithium-ion and we assume the cells are all wired in series, we get a module voltage of 979.2V (nominal). That's a 1000V architecture, not 800V as speculation might otherwise indicate.

With three of these modules wired in parallel, the voltage will remain the same but the current available will go up considerably. We don't know what the individual cell ratings are, but other 4695s are capable of pulse discharging at up to 10C, or ten times their rated capacity in amp-hours. This could mean available power as high as 900kW, or around 1,200 horsepower. The Rivian's 4695s likely err on the side of capacity, though, so such high discharge rates are unlikely.

Once the electric automaker unveils the total capacity of the pack, that sort of information can be extrapolated. For now, just know that these new battery cells will likely enable performance on par if not greater than what Tesla is capable of in cars like the Model Y. How efficiently the rest of the drivetrain uses this energy is going to matter in terms of real-world performance, but the kilowatt-hours are there for the taking. "

 

[TexasBob]

So.... that is an 83kwh - 91 kwh pack (gross). If you run with a 119 Wh per cell (the EVE benchmark for the 4695s) you get 91 kwh. If you just do it at the specific "six times" in the Rivian press release you get 83kwh. My bet is ~91.

This Chinese 4695 cell is rated at 119 Wh a cell.
https://www.linkedin.com/pulse/comparison-eve-4680-4695-cells-keven-chen/

That is consistent with Rivian's numerous announcements that the new cells are "six times" more capacity than the current 2170s. The current cells are 18.1 Wh gross and 17.4 Wh usable.
https://www.batterydesign.net/rivian-r1t/

 

[av8or]

I just hope they charge better and have better controls over the thermals than Tesla has been able to achieve with its 4680. If not and this has more to do with cost savings, I don’t believe it’ll work out well in the long run.

 

[AlphaSnowbordergirl]

Should we assume this is the large battery pack then? Playing with chatgpt for numbers, I was getting an estimated range of 310-333 depending on the Wh per cell.(111-119Wh). They did say the large battery pack would get over 300 not the standard.

 

[SeaGeo]

seems to confirm the speculation from this year old article
Rivian's New Battery Cell Could Be Even Better Than Tesla's

" We don't know the exact specs of these new 4695 cells, but we can do a little bit of guestimation about the pack's specs based on images Rivian showed us at the reveal.

Zooming in on the pack, it appears to consist of 3 large modules separated by heavy internal frame rails. Each module is 34 cells wide by 8 deep, for a total content of 272 cells. If we're talking lithium-ion and we assume the cells are all wired in series, we get a module voltage of 979.2V (nominal). That's a 1000V architecture, not 800V as speculation might otherwise indicate.

With three of these modules wired in parallel, the voltage will remain the same but the current available will go up considerably. We don't know what the individual cell ratings are, but other 4695s are capable of pulse discharging at up to 10C, or ten times their rated capacity in amp-hours. This could mean available power as high as 900kW, or around 1,200 horsepower. The Rivian's 4695s likely err on the side of capacity, though, so such high discharge rates are unlikely.

Once the electric automaker unveils the total capacity of the pack, that sort of information can be extrapolated. For now, just know that these new battery cells will likely enable performance on par if not greater than what Tesla is capable of in cars like the Model Y. How efficiently the rest of the drivetrain uses this energy is going to matter in terms of real-world performance, but the kilowatt-hours are there for the taking. "

Rivian has said R2 is a 400v vehicle.

 

[srh]

Should we assume this is the large battery pack then? Playing with chatgpt for numbers, I was getting an estimated range of 310-333 depending on the Wh per cell.(111-119Wh). They did say the large battery pack would get over 300 not the standard.

Hopefully it's the standard/smaller pack. You have to assume they aren't going to get Model Y efficiency numbers with the boxy design and you need to account for buffer top and bottom of the battery.

 

[RivianRiverRat]

Rivian has said R2 is a 400v vehicle.

Yep - I should have clipped that 1000V speculation out - that ain't happening
main take was the pack size and battery model number to help with range
efficiency is a whole 'nuther matter

 

[AlphaSnowbordergirl]

Hopefully it's the standard/smaller pack. You have to assume they aren't going to get Model Y efficiency numbers with the boxy design and you need to account for buffer top and bottom of the battery.

You are right that I forgot to factor in the lower efficiency due to drag.

 

[emoore]

Hopefully it's the standard/smaller pack. You have to assume they aren't going to get Model Y efficiency numbers with the boxy design and you need to account for buffer top and bottom of the battery.

Sure looks like it's "full" to me so my guess is the large pack. Was there any talk of an R2 max pack?

 

[narmstrong79]

768 doesn't sound like enough batteries.

 

[emoore]

768 doesn't sound like enough batteries.

why? They are much higher capacity per battery than the 2170 cells.

 

[narmstrong79]

why? They are much higher capacity per battery than the 2170 cells.

Just seems like a small number vs other packs out now.
Plus...
They should have gone 777 (Jackpot)

 

[srh]

why? They are much higher capacity per battery than the 2170 cells.

yea, something around 6 times the energy as a 2170. The Model Y has a slightly smaller battery than the planned R2 battery and it only has 830 or so.

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