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KootenayEV

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It seems to be missing the BMS tab now where it showed battery SOH, absolute SOC etc. I’m sad :(
 

KootenayEV

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Ya'll ruined it by making assumptions about what you assumed to be battery degredation.....
I haven't posted any values myself (either written or photos), so you can remove me from that category.

I tracked my SOH using Leaf Spy for several years on my 2014 Leaf (now sold). Like many things with batteries, it is very tricky to get a direct 'reading' of what is true, and so much depends on the algorithm that the company implemented within the BMS software, and also the ambient conditions (and possibly others as well, but I know from trending my Leaf SOH that it would dip in summer then rise through the winter; the median values were in spring/fall with temps around 15C). But SOH for the Leaf was a good indicator of your capacity and ability to fast charge (as SOH got into the 70's, fast charging became limited into the 30 kW range, and eventually regen ability took a hit as well).

For my Model 3, I've been tracking the reported "rated range"* at 100% whenever I charge that high, typically every few months. It's around 475 out of original 520 km of rated range (~91% SOH) - that's pretty good for a car with >175,000km and almost 6 years old. Early in my ownership the rated range started dropping, following the usual LiB curve of quick initial capacity loss, followed by a long plateau period (incidentally, I don't own my Leaf anymore, but my sister-in-law does, and it is well over 200,000km now and 10 years old and is still on this plateau; I have acquaintances that had the earlier chemistry of the Leaf and they reached the end of the plateau much sooner whereby capacity/fast charge/regen ability all started to drop at a much higher rate.)

I've been tracking in a similar fashion on my R1T, and so far it still shows 459 km of rated range at full. It has 18,500 km and is almost 1 year old (build date May 2023, I took delivery Sep 2). I did view the RIDE menu a few times and it displayed a SOH of 97% a few months ago. This is interesting to me because it confirms what I have suspected about how Rivian treats the top-end buffer: several times I have top-charged, then gone for a drive, and it will pull a few kWh out of the pack before the SOC % starts to move. I think Rivian "hid" some of the top buffer so that the usual behaviour of LiB packs didn't get people upset/concerned. At some point the rated range will drop below 459 at a full charge, but I'm guessing it won't be for a several months yet based on my truck's behaviour. I'll continue to track my capacity using the rated range method, but it would have been nice to see the BMS value for SOH to corroborate in case Rivian changes the rated range calculation at some point without advertising.

* Rated range is a concept introduced by Tesla where for each model variant, the car has a standard unchanging calculation for how far the vehicle will move for a certain amount of energy. For my 2018 Model 3 Long Range RWD variant, IIRC, that calculation is 142 Wh/km. Because it doesn't change, you can use it as an indirect measure of how much capacity the BMS thinks the battery has. This is different than most manufacturers, which use a range display that changes dynamically based on driving behaviour. Some brands are better than others, but the Leaf was so notoriously bad that people took to calling it to the GOM ("guess-o-meter"!) For my Rivian, I haven't bothered to figure it out exactly yet, but it appears to be 3.50 km/kWh in All Purpose mode and 3.80 km/kWh in Conserve mode. Like Tesla, Rivian uses rated range on the driver's display, and the "GOM" part only appears when you put a destination in the navigation system.
 
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Dave Cundiff

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* Rated range is a concept introduced by Tesla where for each model variant, the car has a standard unchanging calculation for how far the vehicle will move for a certain amount of energy. For my 2018 Model 3 Long Range RWD variant, IIRC, that calculation is 142 Wh/km. Because it doesn't change, you can use it as an indirect measure of how much capacity the BMS thinks the battery has. This is different than most manufacturers, which use a range display that changes dynamically based on driving behaviour. Some brands are better than others, but the Leaf was so notoriously bad that people took to calling it to the GOM ("guess-o-meter"!) For my Rivian, I haven't bothered to figure it out exactly yet, but it appears to be 3.50 kWh/km in All Purpose mode and 3.80 kWh/km in Conserve mode. Like Tesla, Rivian uses rated range on the driver's display, and the "GOM" part only appears when you put a destination in the navigation system.
[/QUOTE]

Nice explanation of "rated range" concept. I suspect you mean km/kWh, not the reverse?
 

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Service Mode first.
Balls. Thanks, I forgot you had to do this first now. I was really confused yesterday why it wouldn't pop up in the app list.
 

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What update are you on? And what battery/motors do you have?

I have Large/Quad stuck on 24.03.02 and it shows.
Yes, they removed the BMS tab. Too many questions to SC regarding some of the data around SoH
 

KootenayEV

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* Rated range is a concept introduced by Tesla where for each model variant, the car has a standard unchanging calculation for how far the vehicle will move for a certain amount of energy. For my 2018 Model 3 Long Range RWD variant, IIRC, that calculation is 142 Wh/km. Because it doesn't change, you can use it as an indirect measure of how much capacity the BMS thinks the battery has. This is different than most manufacturers, which use a range display that changes dynamically based on driving behaviour. Some brands are better than others, but the Leaf was so notoriously bad that people took to calling it to the GOM ("guess-o-meter"!) For my Rivian, I haven't bothered to figure it out exactly yet, but it appears to be 3.50 kWh/km in All Purpose mode and 3.80 kWh/km in Conserve mode. Like Tesla, Rivian uses rated range on the driver's display, and the "GOM" part only appears when you put a destination in the navigation system.
Nice explanation of "rated range" concept. I suspect you mean km/kWh, not the reverse?
Thx fixed it
 
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Dave Cundiff

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You're welcome.

Just to clarify: I'm the source of the clarifying suggestion, not the author of the analysis. Never had a Tesla, at least not as far as my wife knows.... ;)
 

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Dave Cundiff

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That guy's wife knows his sense of humor. He couldn't lie if his life depended upon it because his highest value is integrity. Without that he feels he'd be nothing.

And he's so geeky, he really loves his Rivian. And because I love him, I tolerate his long hours on the Rivian forum with all his geeky new friends.

Maybe we need a Rivian wive's club...
 

Dave Cundiff

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That guy's wife knows his sense of humor. He couldn't lie if his life depended upon it because his highest value is integrity. Without that he feels he'd be nothing.

And he's so geeky, he really loves his Rivian. And because I love him, I tolerate his long hours on the Rivian forum with all his geeky new friends.

Maybe we need a Rivian wive's club...
Gee, who was that? Not me. Can't show my wife anything around here.... ???
 
 








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