Charging battery to 90% vs 100%?

[Dark-Fx]

Oh they denied your warranty? ?‍?

By your logic, every other item should be a concern too.

Those tenneco units, the inverters, the everything… gawd the sadness that comes from pointing out a warranty is absurd. Meanwhile, 13k miles in a month on our R1S, mostly charging to 95-100% due to towing hard and heavy. Beating the snot outta it all the time. ??‍

If you're okay with a 75% SoH battery at 175k miles when your warranty goes out, you do you. Warranty is supposed to cover abnormal wear. Rivian most likely calculated their warranty based on people who abuse their pack and always charge to 100%. If 85% doesn't work for you today, I'm curious how it'll work for you before the warranty period expires.

I never regularly charge to 100% because the change in regen is annoying.

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[Yossarian]

I would think that there is a lot of discussion and info on charging levels on the Tesla forums, no? I admittedly haven't looked into that. and also don't know if the Tesla batteries are the same technology as those used by Rivian, so even if there is a lot of data and information there, it may not be relevant.

 

[defcon888]

On raod trips we charged 100% at the house and then 80% to 90% after that. I drive into the office 1 day a week and stay a couple of days. It is 145 miles one way and I charge to 80 to 90 at the house and then when I get to work I will charge up to 70% when I leave. I will then stop at a RAN station on my way home (I have 2 to choose from).

 

[NC-Rivian]

Wouldn’t the type of charging be a component too? I seem to recall that Level 2 charging is more gentle than the fast charging L3 dumping lots of Kw onto the battery fast.

 

[AlluSoda]

Couple questions… I don’t drive much. Maybe 20-30 miles per day. I charge to 70% normally.

Is it better to let it drop to say 40% and then charge back up to 70% or just keep it plugged in every day to keep at 70%?

Second question… I actually use both a 48amp L2 charger and a regular 110v charger. The regular plug is actually adequate. Just depends on which side of garage I park on. I read super charging L3 wears out battery faster but is there a difference between regular plug and L2?

Probably nit picking but might as well establish good habits if it makes a difference.

 

[R.I.P.]

To those that assert that "there is not yet enough data" to know how your battery will wear when subjected to different charge practices, this is simply not true. There are laterally millions of Teslas on the road with functionally identical battery chemistries, and we were powering vehicles with similar battery chemistries long before Tesla sold their first vehicle. By "we" I mean I was there, I have been in the industry since working on the EV1 in the 90s.

These are industry accepted facts:

• Charging the batteries currently used in the Rivians to levels over 80% causes disproportionate wear and degradation.
• The absolute longest life of the battery can be accomplished keeping the levels between 30% and 70%

Other chemistries are being used by Tesla and others that have different charge/discharge characteristics, but Rivian is not using any of these yet.

There is the "crowd" that will assert that they regularly disregard the oil type and recommended oil change intervals in their Silverado Duramax. This is the same mentality as anybody telling you to disregard Rivian's recommendations and "always charge to 100%". In both cases it will increase wear on the vehicle, and at best decrease it's value when you go to sell it.

As a note, it is _much_ easier to tell if a truck battery has been abused then a Duramax Engine, so yeah... you absolutely will get hit with decreased resale value if you abuse your pack.

Are you made of money, and don't care? Knock yourself out. Abuse your truck. It is yours, do with it as you wish.

 

[Buckets0fun]

To those that assert that "there is not yet enough data" to know how your battery will wear when subjected to different charge practices, this is simply not true. There are laterally millions of Teslas on the road with functionally identical battery chemistries, and we were powering vehicles with similar battery chemistries long before Tesla sold their first vehicle. By "we" I mean I was there, I have been in the industry since working on the EV1 in the 90s.

These are industry accepted facts:

• Charging the batteries currently used in the Rivians to levels over 80% causes disproportionate wear and degradation.
• The absolute longest life of the battery can be accomplished keeping the levels between 30% and 70%

Other chemistries are being used by Tesla and others that have different charge/discharge characteristics, but Rivian is not using any of these yet.

There is the "crowd" that will assert that they regularly disregard the oil type and recommended oil change intervals in their Silverado Duramax. This is the same mentality as anybody telling you to disregard Rivian's recommendations and "always charge to 100%". In both cases it will increase wear on the vehicle, and at best decrease it's value when you go to sell it.

As a note, it is _much_ easier to tell if a truck battery has been abused then a Duramax Engine, so yeah... you absolutely will get hit with decreased resale value if you abuse your pack.

Are you made of money, and don't care? Knock yourself out. Abuse your truck. It is yours, do with it as you wish.

‘This battery that isn’t the same, will be able to use the same data as the other new different battery.’ ?‍??
Yep. This about sums up the world view on logic and science in recent times.

 

[R.I.P.]

‘This battery that isn’t the same, will be able to use the same data as the other new different battery.’ ?‍??
Yep. This about sums up the world view on logic and science in recent times.

At the cell level, it's the same battery. The packaging is different. It's the chemistry that matters, not the packaging.

So to recap, same battery, same chemistry, decades of data, really no question about the effects of different charging behaviors.

 

[Buckets0fun]

At the cell level, it's the same battery. The packaging is different. It's the chemistry that matters, not the packaging.

So to recap, same battery, same chemistry, decades of data, really no question about the effects of different charging behaviors.

Oh nice? Low cobalt like the tesla? Years of BMS refinements? Are we legacy S/X? Or are we going to experience R80 drama?

This assuming is tiring. Zomg I worked at Nike so I know that new balance really designs their shoes for standing by your vette.

 

[R.I.P.]

Oh nice? Low cobalt like the tesla? Years of BMS refinements? Are we legacy S/X? Or are we going to experience R80 drama?

This assuming is tiring. Zomg I worked at Nike so I know that new balance really designs their shoes for standing by your vette.

I'm curious, your advice is to not heed the manufacturer (Rivian), or battery engineers with decades of experience, so just wondering what your agenda would be?
?

 

[Redline]

Oh nice? Low cobalt like the tesla? Years of BMS refinements? Are we legacy S/X? Or are we going to experience R80 drama?

This assuming is tiring. Zomg I worked at Nike so I know that new balance really designs their shoes for standing by your vette.

You must be fun at parties

 

[Buckets0fun]

I'm curious, your advice is to not heed the manufacturer (Rivian), or battery engineers with decades of experience, so just wondering what your agenda would be?
?

Couldn’t address the questions posed, went into attack(zomg question the author) mode?
Niiiice. I like this playbook.

 

[Buckets0fun]

You must be fun at parties

Oh this type of fun.
Way cool, attack the author when you disagree with their points. ???

 

[Redline]

Oh this type of fun.
Way cool, attack the author when you disagree with their points. ???

 

[emoore]

Guess we should stop feeding the troll.

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