Engineering Explained: Best practices tips to slow down LFP Battery degrading & extend SOH life

[narmstrong79]

Video Description:

Electric cars are becoming increasingly popular, but a common concern remains for many owners - what about the battery? Most batteries used in electric cars today come with one of two major chemistries: Nickel Manganese Cobalt (NMC) or Lithium Iron Phosphate (LFP). LFP batteries are rising in popularity as they're cheaper to manufacturer, and more sustainable since they use more common materials. Each chemistry has unique properties, and benefits from specific best practices, as it relates to making the battery last for a long time. This video will look at the latest research and discuss four major best practices for LFP batteries when it comes to capacity retention and longevity.

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[Davethadog]

This dude is one of the few seemingly intelligent people on the internet putting out decently high quality content who has also miraculously gained somewhat of a large following.

 

[SRO]

Video Description:

Electric cars are becoming increasingly popular, but a common concern remains for many owners - what about the battery? Most batteries used in electric cars today come with one of two major chemistries: Nickel Manganese Cobalt (NMC) or Lithium Iron Phosphate (LFP). LFP batteries are rising in popularity as they're cheaper to manufacturer, and more sustainable since they use more common materials. Each chemistry has unique properties, and benefits from specific best practices, as it relates to making the battery last for a long time. This video will look at the latest research and discuss four major best practices for LFP batteries when it comes to capacity retention and longevity.

What battery chemistry is in gen 2?

 

[Davethadog]

What battery chemistry is in gen 2?

LFP for standard. NMC for everything else though large pack seems to maybe remain a mystery.

 

[zefram47]

What battery chemistry is in gen 2?

The Standard battery is supposed to be LFP and Large, Large+, Max are NMC chemistries.

 

[SRO]

The Standard battery is supposed to be LFP and Large, Large+, Max are NMC chemistries.

Super thanks.

 

[narmstrong79]

What battery chemistry is in gen 2?

Gen 2 Standard is lfp

 

[s0ysauce]

Folks are not going to be happy that they can't charge those LFPs to 100% everyday.

edit: TLDW

 

[djsider2]

So similar to NMC?

 

[Goose]

So similar to NMC?

He says it’s actually the opposite. Instead of ABC (always be charging) LFP should only be charged when required (CWR I guess?). So what it sounds like is you treat it like an ICE truck. You drive it until you hit about 10%, then say “balls, I need to charge”. You then get home and plug it in with a charge limit of 100%.

 

[mkhuffman]

This dude is one of the few seemingly intelligent people on the internet putting out decently high quality content who has also miraculously gained somewhat of a large following.

"Seemingly".

Maybe he is, but that wheel efficiency video so many people like to reference is a load of crap. His conclusion is: larger rims are less efficient than smaller rims. That is simply not true. And this year, Rivian proved it was not true with the Gen2 22" rim.

I hope that is his only video that sucks, and the rest live up to his reputation. I will give this one a watch and try to suppress my bias.

 

[Supratachophobia]

"Seemingly".

Maybe he is, but that wheel efficiency video so many people like to reference is a load of crap. His conclusion is: larger rims are less efficient than smaller rims. That is simply not true. And this year, Rivian proved it was not true with the Gen2 22" rim.

I hope that is his only video that sucks, and the rest live up to his reputation. I will give this one a watch and try to suppress my bias.

Well, to be fair about the wheels, they can be. I heard it matters more about the surface area that has space for wind to get trapped. And generally speaking, smaller rims have more tire than rim so therefore less area for air to get disturbed. But a large rim that has say, a pizza pan zip tied to it, would be quite efficient.

Of course, contact patch and compound matter as well.

 

[CharonPDX]

tl;dr:

* Gen 1 or "bigger than smallest battery" Gen 2: Set daily limit as low as is reasonable for your driving habits (70% is Rivian's recommendation,) charge to 100% sparingly (only when absolutely needed for a trip, charging to it as close to departure time as possible) plug in and charge (to that daily limit) as often as possible.

* Gen 2 smallest battery: Charge to 100%, but don't charge as often, let it get closer to empty between charges.

* All: Don't let charge drop to 0%
* All: When storing the vehicle for a long period (multiple weeks) set max charge to 50% and leave plugged in, then charge to your normal max (per above) before using again.

 

[mkhuffman]

Well, to be fair about the wheels, they can be. I heard it matters more about the surface area that has space for wind to get trapped. And generally speaking, smaller rims have more tire than rim so therefore less area for air to get disturbed. But a large rim that has say, a pizza pan zip tied to it, would be quite efficient.

Of course, contact patch and compound matter as well.

You are providing a better explanation than he did for why it is sometimes true, but not always.

It is not the size of the wheel that matters. What matters is rolling resistance, rotational resistance and aerodynamics. You can have a big rim that is more aerodynamic than a small rim, and of course, the rolling resistance of tires is a huge variable that does not really correlate with rim size. A heavy rim/tire combination will increase acceleration resistance but have no impact at a steady speed. He didn't explain most of that.

It is not a good video. It makes people think they can always increase range by getting smaller rims, which is not true. As Rivian proves.

He did a much better job in the OP's LFP battery video, so maybe the wheel video was just a bad day for him.

By the way, I put heavier, bigger tires on my stock Mach-e GT rims and it improved highway efficiency by 7%. That is the opposite of what his bad video would have you believe.

 

[narmstrong79]

By the way, I put heavier, bigger tires on my stock Mach-e GT rims and it improved highway efficiency by 7%. That is the opposite of what his bad video would have you believe.

I also went from Mach-E to Rivian.
When you say "bigger" which measurement do you mean? I upgraded the skinny tires with (I had a select 18in and then premium 19in ) wider and 20" and noticed a reduction in efficiency with highway driving.

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