DC fast charging and motor temperatures.

[COdogman]

Did your truck ship with the driver monitoring camera? If not, I'd surmise they may have just repositioned it instead of removed...

Probably got me that one summer day I was wearing flip flops?

Sponsored

 

[RayzorBEV]

Ugg. You are really suggesting we want data hidden from us? It is annoying enough that they don't want me to see the battery temperatures, don't hide more data from me!

I want inverter temperatures. I want the deep dive screens Tesla provides for energy usage. More information is good, more information helps people make better plans and decisions. Every time someone suggests information should be taken away from us " dumb drivers" It makes my teeth hurt.

?

I also want tire temperature displayed on each tire along side with the tire pressure ?

 

[CharonPDX]

Rivian copied Tesla's design where they use motor windings to help bring the battery up to charging temperature when needed. Unfortunately, on the first iteration this was done on a jacket cooled motor (the Bosch) where Tesla's design was built based on an oil bath motor. As a result, the Bosch motored Rivian has to really throw some temps into those motors to get any usable heat out of it. It is a relatively inefficient design.

Rivian corrected this on version 2 of their drivetrain (the Enduro), but for those running Bosch motors, high temps are the norm when trying to get some heat into the battery.

Yep. Mine got ultra-toasty on a recent trip. And what may have made it worse is that I was driving in "Conserve" mode on the freeway, so all the battery preheat energy had to be generated by just the front motors. I happened to flip to the gauges screen and saw the front motors in orange, so switched to All-Purpose mode. Took a picture a couple minutes later and the rears still weren't anywhere near as toasty as the fronts.

 

[Mooeymoose]

Ppl

Rivian copied Tesla's design where they use motor windings to help bring the battery up to charging temperature when needed. Unfortunately, on the first iteration this was done on a jacket cooled motor (the Bosch) where Tesla's design was built based on an oil bath motor. As a result, the Bosch motored Rivian has to really throw some temps into those motors to get any usable heat out of it. It is a relatively inefficient design.

Rivian corrected this on version 2 of their drivetrain (the Enduro), but for those running Bosch motors, high temps are the norm when trying to get some heat into the battery.

Thank you. This is very helpful. Is there a source that you know that will go in to more detail about this topic for my own understanding?

 

[Electrified Outdoors]

Ugg. You are really suggesting we want data hidden from us? It is annoying enough that they don't want me to see the battery temperatures, don't hide more data from me!

I want inverter temperatures. I want the deep dive screens Tesla provides for energy usage. More information is good, more information helps people make better plans and decisions. Every time someone suggests information should be taken away from us " dumb drivers" It makes my teeth hurt.

?

98% of drivers don't want or need that level of information. It creates additional questions. More questions than what it answers. I would like the same information myself. Maybe give geeks like us some kind of secret screen that we can access that info. But otherwise, I think they should have some kind of indicator that shows that it's preconditioning the battery. Otherwise, people are going to see that the motors overheating and freak out.

And they really don't have to take any information away. They could simply have an icon appear showing that the batteries preconditioning in the motor temperature gauge area. And I would really appreciate if they could show the battery temperature while the vehicle is charging and maybe have an icon in that area. But Rivian is already providing more than what as far as I know. Any other EV makers doing by showing motor and battery temperatures.

 

[Electrified Outdoors]

Ppl


Thank you. This is very helpful. Is there a source that you know that will go in to more detail about this topic for my own understanding?

Here is a patent shows in the Tesmanian article.

https://www.tesmanian.com/blogs/tesmanian-blog/electric-motor-waste-heat-mode-to-heat-battery

 

[RivianRiverRat]

Similar happened to me last night and twice this morning at DCFC.
Temps +/- 20 degrees in north Alabama.
Figured last night was an error on me since I didn't navigate/pre-condition.
This morning I did navigate but the tesla charger was only 1.5 miles away.
Passenger front went to 292, other 3 at 220-240 and charging was limited to 7kWh in 18 minutes.
Navigated/pre-conditioned to a ChargePoint about 5 miles away and passenger front went to 296, other 3 still at 220-240 and charging was limited to 2kWh in 6 minutes.
Did a hard reset and moved to another charger.
This helped a little - charged 15kWh in 32 minutes with the left front at 296 and right front at 284, rears at 260, outdoor temp 19 and battery temp 64
Motor temps did not increase as quickly and all were in closer range of each other not just one motor way out in left field by itself.
Once I unplugged when I got the amount needed, temps returned to moderate levels very quickly.

I'm all for gages and warning lights but I need some base line info on what's happening.

Agree with you Electrified - "But otherwise, I think they should have some kind of indicator that shows that it's preconditioning the battery. Otherwise, people are going to see that the motors overheating and freak out."

Sponsored