Out of Spec review on 500A charging

[R1Sky Business]

There's a lot of confidence in this statement without a lot of context. Source? Or just assuming it is like the rest of us?

Common sense

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[SeaGeo]

Common sense

There are a lot of common sense things that companies seem to miss.

I am assuming it's coming too. Just curious if they had a conversation with anyone at Rivian.

 

[CYoung]

There are a lot of common sense things that companies seem to miss.

I am assuming it's coming too. Just curious if they had a conversation with anyone at Rivian.

Sources that are very close to the situation

 

[zipzag]

Yeeep. I'm a little concerned that he was running into a constraint that's not actively cooled (like a cable outside the pack). No idea though. We'll just have to see what Rivian cooks up.

The reduced power while apparently ramping the AC compressor is odd behavior that I would have expected to be addressed in testing before release. So perhaps it's a more complicated issue. I don't know how the thermal system can be "surprised" that pack temp is now to high.

Also, Kyle was presumably charging in cool temps. And IIRC RJ has said the goal is 300kw+ charging.

The cell C rate is less than half of Tesla. So assuming a similar thermal system Rivian should have a lot of room for charging improvement.

 

[slawwach]

I either cannot find it or Rivian removed the statement from their website that R1T will provide "fast charging at over 200 kW for sustained period".
Just wondering is that not a goal anymore, or just removed it as this is not true at this point.

 

[ajdelange]

The cell C rate is less than half of Tesla. So assuming a similar thermal system Rivian should have a lot of room for charging improvement.

Ahh! Someone recognizes that there is more to it that just temperature! Bravo.

 

[ja_kub_sz]

Honesty the Rivian charging curves haven't been impressive since the start (probably the most unimpressive thing about Rivian).

This doesn't really change things.

Makes me wish I had my Max Pack so I wouldn't have to worry as much about these charging issues.

 

[SeaGeo]

The reduced power while apparently ramping the AC compressor is odd behavior that I would have expected to be addressed in testing before release. So perhaps it's a more complicated issue. I don't know how the thermal system can be "surprised" that pack temp is now to high.

Also, Kyle was presumably charging in cool temps. And IIRC RJ has said the goal is 300kw+ charging.

The cell C rate is less than half of Tesla. So assuming a similar thermal system Rivian should have a lot of room for charging improvement.

Yep. It's a low C rate in general, which is part of the reason I'm a little dubious it had anything to do with the actual cells.

The whole thing is a little confusing. I would have expected this to be more fleshed out by now.

 

[zipzag]

Max pack charging on 800V seems to be a competitive requirement.

A 300 mile pack with LFP would also seems to be a worthwhile goal.

 

[R1Sky Business]

The reduced power while apparently ramping the AC compressor is odd behavior that I would have expected to be addressed in testing before release. So perhaps it's a more complicated issue. I don't know how the thermal system can be "surprised" that pack temp is now to high.

Also, Kyle was presumably charging in cool temps. And IIRC RJ has said the goal is 300kw+ charging.

The cell C rate is less than half of Tesla. So assuming a similar thermal system Rivian should have a lot of room for charging improvement.

300kw goal but did not specify when or with which voltage architecture

 

[R1Sky Business]

I either cannot find it or Rivian removed the statement from their website that R1T will provide "fast charging at over 200 kW for sustained period".
Just wondering is that not a goal anymore, or just removed it as this is not true at this point.

Sustained is a subjective matter

 

[R1Sky Business]

There are a lot of common sense things that companies seem to miss.

I am assuming it's coming too. Just curious if they had a conversation with anyone at Rivian.

I think that we have to be "all in " if you believe that they have what it takes to improve over time. If not, the bugs are going to eat people alive.

 

[R1Sky Business]

Honesty the Rivian charging curves haven't been impressive since the start (probably the most unimpressive thing about Rivian).

This doesn't really change things.

Makes me wish I had my Max Pack so I wouldn't have to worry as much about these charging issues.

With Max pack you would have to worry more due to the additional time that would take to charge.

 

[R1Sky Business]

Max pack charging on 800V seems to be a competitive requirement.

A 300 mile pack with LFP would also seems to be a worthwhile goal.

Years....
Away

 

[zipzag]

Years....
Away

Can't be too long. 800v is likely designed in already and the other big battery trucks are already ahead. I see Lightning has an 80A onboard charger, and Hummer supports 800V I think. Cybertruck will undoubtedly be far superior at charging compared to todays Rivian.

IMO this is the only part of Rivian that is going to require a substantial upgrade. Maybe that upgrade is just software. Munro's teardown should indicate how 800v ready the truck is today.

I don't expect an 800V system, just a split pack that can charge above 300kw. 800V at 400 amps is 320kw.

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