Is the R1 gen 2 Large Battery pack just a software limited Max (or prior Large) Pack? Or something else?

[usofrob]

The max pack is 141.5 kwh using the newer 53g cells.
The gen2 large is reported to be 109 kwh.
We know Rivian sold Standard and Standard+ packs as SW limited packs.
The gen2 large is still available with dual motor performance, that the LFP battery isn't. So, it needs to maintain a kind of high power output, but only 2/3 the power of the newer quad.

Is the large pack possibly just 7 modules (vs 9 for the others)? If yes, presumably it would weigh less? Seems possible from a power limitation standpoint.
Is it just a max pack that is software limited? They've done it before, but would they keep doing that on their new long term gen2 platform?
Is it a cell other than 53g that is software limited? Maybe the original 50g, or maybe a lower capacity cell?
Could it be an R2 large/max pack wrapped into an R1 battery pack?

Having less cells would be lighter, which is nice.
Being SW limited would mean you could 100% charge like an LFP and have a great charge curve for the available capacity.
Having a lower capacity cell might mean better longevity.

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[DuoRivians]

Rivian is rumored to launch a hybrid LFP NCA pack. The large pack could be that. Large pack isn’t shipping soon either, so we’ll see

 

[tecra]

They are not going to waste 32 kWh of battery capacity, that's insane

 

[usofrob]

They are not going to waste 32 kWh of battery capacity, that's insane

That's basically what they did with the gen1 Standard Pack. It was 106 kwh from either 141 or 131 kwh. It seemed 'insane' at the time as well..

 

[tecra]

That's basically what they did with the gen1 Standard Pack. It was 106 kwh from either 141 or 131 kwh. It seemed 'insane' at the time as well..

Do you have proof of that? All I have seen is speculation

 

[DuoRivians]

That's basically what they did with the gen1 Standard Pack. It was 106 kwh from either 141 or 131 kwh. It seemed 'insane' at the time as well..

They did this with the standard pack because it was 1/ way to move volume asap and 2/ establish market position that Rivian has a standard pack before they get the LFP standard pack to market

 

[Dark-Fx]

Do you have proof of that? All I have seen is speculation

2024 EPA documents call standard out as being software locked.

 

[tecra]

EPA documents call standard out as being software locked.

We know it's software locked, question is what the total capacity is, I am doubtful it is 141 kWh as op claims

 

[usofrob]

We know it's software locked, question is what the total capacity is, I am doubtful it is 141 kWh as op claims

Being a software locked max pack is just one of the options I'm asking about. But, I believe the EPA document implied they might use either a Large 131 or max 141 pack software locked to a standard. I'm not sure to know which one any specific vehicle has. The best evidence was from the charging curve. But it didn't seem definitive enough to confirm max/large for me.

 

[Dark-Fx]

We know it's software locked, question is what the total capacity is, I am doubtful it is 141 kWh as op claims

It actually could be either a large (50G) or max(53G) battery. I believe the VIN will expose that information.

 

[usofrob]

I'm starting to lean on the idea that they're going to populate 7 of 9 modules. Thrir estimated charge speed is slower:

	kwh usable	kwh to charge (70%)	minutes	kwh/h
Max	141.5	99.05	41	144.9512195
Large	109.4	76.58	36	127.6333333
Standard	92.5	64.75	30	129.5

It'll probably charge at about the same rate at the lower %, but it would start decreasing sooner because once the charging is pack limited, it can only charge at 77% (7/9) of the rate.

How much do we think each module weighs? What's the 53g cell weight? ...*(7776/9*2=1728)=min weight savings in the large pack.

Total Battery Weight (kg.): 787
Assuming this include the entire weight of the pack, the weight savings would be less than 787/9*2=175kg = 385 pounds

Maybe the 300+ pounds weight savings helps the efficiency testing to get 3.0 miles/kwh vs 2.9 of Max and Standard

141.5	410	2.9
109.4	330	3.0
92.5	270	2.9

Or they're estimating against the R1T by accident.

141.5

420

2.97

 

[jjswan33]

I'm starting to lean on the idea that they're going to populate 7 of 9 modules. Thrir estimated charge speed is slower:

	kwh usable	kwh to charge (70%)	minutes	kwh/h
Max	141.5	99.05	41	144.9512195
Large	109.4	76.58	36	127.6333333
Standard	92.5	64.75	30	129.5

It'll probably charge at about the same rate at the lower %, but it would start decreasing sooner because once the charging is pack limited, it can only charge at 77% (7/9) of the rate.

How much do we think each module weighs? What's the 53g cell weight? ...*(7776/9*2=1728)=min weight savings in the large pack.

Total Battery Weight (kg.): 787
Assuming this include the entire weight of the pack, the weight savings would be less than 787/9*2=175kg = 385 pounds

Maybe the 300+ pounds weight savings helps the efficiency testing to get 3.0 miles/kwh vs 2.9 of Max and Standard

141.5	410	2.9
109.4	330	3.0
92.5	270	2.9

Or they're estimating against the R1T by accident.

141.5

420

2.97

Just keep in mine that Rivian is calling the payload of the Large and Max pack out as the same:

https://media.rivian.com/shop/Builder/PDFs/R1S-Compare-06-04-24_npbaxc

So either they made a mistake in this table or the battery of the large and max packs are the same weight.

 

[DuoRivians]

I'm starting to lean on the idea that they're going to populate 7 of 9 modules. Thrir estimated charge speed is slower:

	kwh usable	kwh to charge (70%)	minutes	kwh/h
Max	141.5	99.05	41	144.9512195
Large	109.4	76.58	36	127.6333333
Standard	92.5	64.75	30	129.5

It'll probably charge at about the same rate at the lower %, but it would start decreasing sooner because once the charging is pack limited, it can only charge at 77% (7/9) of the rate.

How much do we think each module weighs? What's the 53g cell weight? ...*(7776/9*2=1728)=min weight savings in the large pack.

Total Battery Weight (kg.): 787
Assuming this include the entire weight of the pack, the weight savings would be less than 787/9*2=175kg = 385 pounds

Maybe the 300+ pounds weight savings helps the efficiency testing to get 3.0 miles/kwh vs 2.9 of Max and Standard

141.5	410	2.9
109.4	330	3.0
92.5	270	2.9

Or they're estimating against the R1T by accident.

141.5

420

2.97

Where did you get the minutes values

 

[jjswan33]

Where did you get the minutes values

Those numbers are in the table I linked above with the payloads.

 

[usofrob]

Where did you get the minutes values

From their comparison table:
https://media.rivian.com/shop/Builder/PDFs/R1S-Compare-06-04-24_npbaxc

Just keep in mine that Rivian is calling the payload of the Large and Max pack out as the same:

https://media.rivian.com/shop/Builder/PDFs/R1S-Compare-06-04-24_npbaxc

So either they made a mistake in this table or the battery of the large and max packs are the same weight.

That's a good point. But they may just be under promising. If they actual weight is lower, it can still has at least that payload, it just has more.

The payload values are suspect. Do you think the tri motor is the same weight as the dual?

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