Rivian Peak Charge Rate

[pc500]

CCS as a standard is limited to 500amps.

An interesting tidbit that has shown up recently is some of the EA chargers seem to be limited to ~350-380 amps. They can still achieve 350kw 380amps with 920v. Why is this interesting? Because that will limit a 400v class vehicle to ~140 to 160kw.Yet many of the 150kw EA Stations can actually hit closer to 175kw. Sooooo it's possible that we'll get faster charging speeds on most 150kw EA stations than some of their 350kW stations (specifically it seems like the ABB stations).



Unless RAN is going outside of the CCS standard (I'm extremely skeptical of that), they'd have to have a way to have an 800v type charging (ie the patent we've all discussed).

Months ago someone found and shared the specs of the chargers, and they were 920v chargers.


I agree with @kanundrum. Buy it with the current performance in mind (~180kw+ through 50% or 60%), and hopefully they surprise us and actually do have hardware capability for the 800v charging via the split pack. I would absolutely not trust CS on this until it's clear on their website or you hear it from RJ's mouth. I have reason to believe it's there, but I'm not putting money down on it.

Because that will limit a 400v class vehicle to ~140 to 160kw

Because as they charge 400v hits 430... 450v... and kwh goes up accordingly.

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[SeaGeo]

Because that will limit a 400v class vehicle to ~140 to 160kw

Because as they charge 400v hits 430... 450v... and kwh goes up accordingly.

?

 

[Craigins]

I agree, I'm also basing my expectations on what is actually known vs the information CS has or doesn't have access to, but.... I am hopeful!

just an FYI, keep in mind that the CS folks have less information than what is known on these forums. It is better to search these forums to get information than to ask CS.

 

[MountainBikeDude]

just an FYI, keep in mind that the CS folks have less information than what is known on these forums. It is better to search these forums to get information than to ask CS.

hahaha well aware of that fact. Any one of us on here has more information on the vehicles than they do, but sometimes they can surprise!

 

[MountainBikeDude]

Tons of discussion on this between @SeaGeo and my self and the only conclusion is based on what it's now is 200kw give or take. Buy it for that, don't assume anything.

While not the most convincing quote of RJ, it's something. he touches on 300kw charging at 11:21

Here's a well-done video posted from the San Fran event interviewing Rivian engineer Brian Gase, and R.J. Brian explains how Alexa integration will work and R.J. talks about branded chargers — the Rivian Adventure Network. Thanks to Tesla Raj for posting.

 

[pc500]

?

If a vehicle at 400v gets 150kwh at its base charge voltage , as the charge curve progresses the kwh will actually increase. This is because as the charge completes output approaches higher voltages -- ie: 450v.

It's minor, but enough to account for the 25kwh, and why many of them hit close to 175kwh.

 

[SeaGeo]

If a vehicle at 400v gets 150kwh at its base charge voltage , as the charge curve progresses the kwh will actually increase. This is because as the charge completes output approaches higher voltages -- ie: 450v.

It's minor, but enough to account for the 25kwh, and why many of them hit close to 175kwh.

Ah. That's makes more sense. yep! Though cars generally don't hit peak voltage and peak current concurrently.

 

[Trandall]

What is the charging time impact really between a peak rate of 300KW and 200KW? Isn't a well engineered BMS with good thermal management that can ramp and sustain 200KW longer nearly as good as 300KW? If it is the difference of 28 minutes of charging vs. 35 minutes between DC charges on a handful of road trips a year for my use case I really don't mind, especially if it means less wear and tear on my pack. Anyone with experience know if this assumption is in the ballpark?

 

[SeaGeo]

What is the charging time impact really between a peak rate of 300KW and 200KW? Isn't a well engineered BMS with good thermal management that can ramp and sustain 200KW longer nearly as good as 300KW? If it is the difference of 28 minutes of charging vs. 35 minutes between DC charges on a handful of road trips a year for my use case I really don't mind, especially if it means less wear and tear on my pack. Anyone with experience know if this assumption is in the ballpark?

It really depends on the curve, and we'd all be guessing at that. You could conceivably be talking about 9 or 10 minutes for 10 to 60%, but realistically it'd be less than that unless they had a taycan type charging curve.

It's really more impactful for the max pack.

 

[MountainBikeDude]

What is the charging time impact really between a peak rate of 300KW and 200KW? Isn't a well engineered BMS with good thermal management that can ramp and sustain 200KW longer nearly as good as 300KW? If it is the difference of 28 minutes of charging vs. 35 minutes between DC charges on a handful of road trips a year for my use case I really don't mind, especially if it means less wear and tear on my pack. Anyone with experience know if this assumption is in the ballpark?

100% true, if it can stay at 200kw for a longer duration that would be ideal, less wear and tear potentially than charging at a higher rate short term.

 

[kanundrum]

While not the most convincing quote of RJ, it's something. he touches on 300kw charging at 11:21

A lot of articles quote it as well however we were also shown, chatted up electrochromatic glass, removable roof etc ahah.

 

[Dark-Fx]

CCS as a standard is limited to 500amps.

I see stuff like this repeated a lot. According to the latest J1772 spec, DC Level 2's maximum current is 400A. But there's no physical limitation to the maximum current like there is with AC Level 2. (If you're not aware, the maximum signalling possible is 80A on L2. It's physically impossible to signal higher.)

The CharIN DC CCS stuff is all an extension on this specification that introduces power classes where the highest ones are " ≥500A@500V ". There is no "cannot be higher than 500A" for CCS, it's open ended on purpose. As long as the station and car can handle a higher current, there is no technical reason they can't use more current.

 

[ERguy]

A lot of articles quote it as well however we were also shown, chatted up electrochromatic glass, removable roof etc ahah.

The electrochromic roof would have been so cool. Maybe more novelty than useful... But cool nonetheless.

Looks like BMW liked the idea of the dimmable roof so much, they are borrowing it for the iX.



On a more surprising note to me, the Toyota Venza even has an electrochromic roof.

 

[MountainBikeDude]

A lot of articles quote it as well however we were also shown, chatted up electrochromatic glass, removable roof etc ahah.

Thankfully they kept the 180 Tailgate.

 

[pc500]

What is the charging time impact really between a peak rate of 300KW and 200KW? Isn't a well engineered BMS with good thermal management that can ramp and sustain 200KW longer nearly as good as 300KW? If it is the difference of 28 minutes of charging vs. 35 minutes between DC charges on a handful of road trips a year for my use case I really don't mind, especially if it means less wear and tear on my pack. Anyone with experience know if this assumption is in the ballpark?

I'd actually like to be able to set the rate for different reasons. Mostly, so I can time the charging finish with my meal/whatever errand I'm running.

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