Preconditioning confusion

[Riv_Goat]

No maybe I'm not clear, newest update they said they added scheduled interior and battery precondtioning. However I'm not seeing my battery be any warmer than before the update.

Saying that scheduled interior and battery preconditioning was added doesn’t mean that the battery didn’t precondition before. It just means it wasn’t scheduled.

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[Throwdown]

If you are not seeing the battery heat during preconditioning, it is because your battery is >40 degrees F, and the BMS has decided it is not necessary.

The BMS will not heat the battery unnecessarily.

See my edited post, that's why I wanna see the specs, a warm battery to me is above 75F and since it gives the option to precondtion from the grid why wouldn't put the battery at a higher temp for efficiency?

 

[Throwdown]

Saying that scheduled interior and battery preconditioning was added doesn’t mean that the battery didn’t precondition before. I just means it wasn’t scheduled.

That may be the answer, but I would expect it to be warmer than 58F.

 

[R.I.P.]

See my edited post, that's why I wanna see the specs, a warm battery to me is above 75F and since it gives the option to precondtion from the grid why wouldn't put the battery at a higher temp for efficiency?

Because your perception of a "warm battery" is out of sync with the industry standard.

It is widely accepted in the industry that detrimental things happen to lithium batteries below 40 degrees F. There is really no reason to heat the batteries beyond 50 degrees unless you are going to try to force a large charge though it (DCFC).

There. Those are your specs. It is not unique to Rivian, it applies to your phone too. Trying to put that much heat into the pack (your 75F mark) outside the need to DCFC would be a waste of energy.

 

[Throwdown]

Because your perception of a "warm battery" is out of sync with the industry standard.

It is widely accepted in the industry that detrimental things happen to lithium batteries below 40 degrees F. There is really no reason to heat the batteries beyond 50 degrees unless you are going to try to force a large charge though it (DCFC).

There. Those are your specs. It is not unique to Rivian, it applies to your phone too. Trying to put that much heat into the pack (your 75F mark) outside the need to DCFC would be a waste of energy.

Not true, but my training and access to factory information is with a company that doesn't have thermal issues like rivian does so my frame of reference is different. I can only speak to what I know and that is that a porsche says optimum battery temp is 83f and they won't heat the battery until it drops below 0F.

 

[Throwdown]

Because your perception of a "warm battery" is out of sync with the industry standard.

It is widely accepted in the industry that detrimental things happen to lithium batteries below 40 degrees F. There is really no reason to heat the batteries beyond 50 degrees unless you are going to try to force a large charge though it (DCFC).

There. Those are your specs. It is not unique to Rivian, it applies to your phone too. Trying to put that much heat into the pack (your 75F mark) outside the need to DCFC would be a waste of energy.

Not true, but my training and access to factory information is with a company that doesn't have thermal issues like rivian does so my frame of reference is different. I can only speak to what I know and that is that a porsche says optimum battery temp is 83f and they won't heat the battery until it drops below 0F

 

[Dark-Fx]

Not true, but my training and access to factory information is with a company that doesn't have thermal issues like rivian does so my frame of reference is different. I can only speak to what I know and that is that a porsche says optimum battery temp is 83f and they won't heat the battery until it drops below 0F.

Optimum for what? Porsche has different expectations. Rivian is trying to minimize energy usage while still being "good enough".

 

[Throwdown]

Optimum for what? Porsche has different expectations. Rivian is trying to minimize energy usage while still being "good enough".

Efficiency, the only reason to heat the battery before you leave your house would be to have better efficiency. They added it for a reason, maybe they got too many cold weather efficiency complaints, idk

 

[emoore]

Not true, but my training and access to factory information is with a company that doesn't have thermal issues like rivian does so my frame of reference is different. I can only speak to what I know and that is that a porsche says optimum battery temp is 83f and they won't heat the battery until it drops below 0F.

Well that’s Porsche and not Rivian. they have determined that 58F is warm enough. Maybe they change that later but you are lying saying that they didn’t include preconditioning.

 

[Throwdown]

Well that’s Porsche and not Rivian. they have determined that 58F is warm enough. Maybe they change that later but you are lying saying that they didn’t include preconditioning.

Then why are some people's trucks batteries being warmed to 70F on preconditioning?

 

[emoore]

Then why are some people's trucks batteries being warmed to 70F on preconditioning?

Because they have cold batteries. Mine was at 14 F and it preconditioned to 60s. I wouldnt expect a warm battery to precondition to slightly warmer.

 

[R.I.P.]

Then why are some people's trucks batteries being warmed to 70F on preconditioning?

Because they are preparing for DCFC.

Are you seriously this confused, or are you just trying to pick an argument?

Tesla, GM, Ford, Kia, Hyundai and Rivian all use similar algorithms when it comes to battery temperatures. The assumptions you have presented here are frankly way out in left field and I am not sure what your purpose is in continuing this argument.

Just saying.

 

[Throwdown]

Because they are preparing for DCFC.

Are you seriously this confused, or are you just trying to pick an argument?

Tesla, GM, Ford, Kia, Hyundai and Rivian all use similar algorithms when it comes to battery temperatures. The assumptions you have presented here are frankly way out in left field and I am not sure what your purpose is in continuing this argument.

Just saying.

No, you are. Im not confused at all. Im wondering solely why there seems to be a difference in these battery preconditiong temps. I oberved that my battery is no dofferent in temp now that it ever was before this option was made available. All my statements are about the new update with the departure battery and interior preconditioning. You are out in left field.

Just saying

 

[emoore]

You see you're missing my point, the battery warms naturally

No, you are. All my statements are about the new update with the departure battery and interior preconditioning. You are out in left field.

Just saying

Sure it warms naturally when charging or driving. I wasn’t plugged in and I was able to precondition the battery before I left. Not sure why your point is here.

 

[Throwdown]

Sure it warms naturally when charging or driving. I wasn’t plugged in and I was able to precondition the battery before I left. Not sure why your point is here.

My point is the same it's been this entire time, they said they added something and I don't think they did. I don't think the battery preconditiong is any different than it ever was while charging overnight. That's all, no more no less.

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