Top battery off to 90% every day?

[invertedspear]

If I'm understanding correctly you are suggesting that I've been reading the charts wrong this entire time. When a test (as MickeyAO would say) only uses a delta of 50% that is not considered a charge cycle. It actually means you get 6-8000 X the full capacity of the battery.

My typical trips are 50 miles, 76 miles, 90 miles, 110 miles, with a 10-15% of them being 250 miles or longer. So I should total all of those trips up and divide it by the capacity of the battery. A rough calculation of this would be 101,000 miles divide by 2.1 m/kwh = 48,095kwh/ 145kwh capacity = 331 complete charge cycles. That is interesting.

My battery should last at least a million miles.

Exactly, I will always differ to MickeyAO on things like this, but I think it's the fact you're getting all your miles in on a battery that's still rather "young" is probably playing into that million mile possibility. Also, the thermal management of this battery seems to be really great, gives me a lot of confidence in the long term viability of this truck.

Sponsored

 

[Helium]

Saw a research paper that showed NMC batteries, on average, hit 85% of original capacity around 2000 cycles. Where did you see information about 6-8000 cycles?

The last one I saw was from a Canadian university. Also, I use 70% as "end of life" not 85%

The 6-8000 charge cycles came from only discharging from something like 75% down to 25% each time. The 6-8000 charge cycles is a complete charge and discharge of the entire battery. if that makes sense. I discussed this further up this thread with @invertedspear here:

https://www.f150lightningforum.com/forum/threads/top-battery-off-to-90-every-day.17738/post-387322

and here:

https://www.f150lightningforum.com/forum/threads/top-battery-off-to-90-every-day.17738/post-387341

 

[Zprime29]

The last one I saw was from a Canadian university. Also, I use 70% as "end of life" not 85%

Quick search doesn't reveal many results that detail how they determine lifespan, most only quote to 80-85%. I certainly won't complain if they make it that many cycles, like you I'm just hoping to get ~300,000 miles.

 

[Helium]

Quick search doesn't reveal many results that detail how they determine lifespan, most only quote to 80-85%. I certainly won't complain if they make it that many cycles, like you I'm just hoping to get ~300,000 miles.

I generally follow the warranty which is 70% at 100,000 miles.

 

[Helium]

Quick search doesn't reveal many results that detail how they determine lifespan, most only quote to 80-85%. I certainly won't complain if they make it that many cycles, like you I'm just hoping to get ~300,000 miles.

Just want you to know that I stumbled across the Youtube video where I got the 70-30% charge range. There are two of them but they are both with Dr. Jeff Dahn from Dallhousie University.



This link with the time code should get you to the chart I was looking for:

 

[MickeyAO]

Take Dr Dahn's advice over ANYTHING I might say! I will probably go with my observations over Dr Dahn, but he has MUCH better knowledge than I do.

I do the 85% of usable SOC to handle anything that might come up.

 

[Helium]

Take Dr Dahn's advice over ANYTHING I might say! I will probably go with my observations over Dr Dahn, but he has MUCH better knowledge than I do.

I do the 85% of usable SOC to handle anything that might come up.

By chance do you know what the chemistry\cell designation (i.e. NMC622) in the Lightning is? I've found press releases from years ago about a Nickel 9 battery but nothing that points directly at the designation.

 

[ctuan13]

Take Dr Dahn's advice over ANYTHING I might say! I will probably go with my observations over Dr Dahn, but he has MUCH better knowledge than I do.

I do the 85% of usable SOC to handle anything that might come up.

I can't remember if you said before, is this 85% displayed SOC or 85% actual SOC?

 

[Maquis]

I can't remember if you said before, is this 85% displayed SOC or 85% actual SOC?

He is charging to 85% displayed which is about 80% actual. I do the same.

 

[TaxmanHog]

By chance do you know what the chemistry\cell designation (i.e. NMC622) in the Lightning is? I've found press releases from years ago about a Nickel 9 battery but nothing that points directly at the designation.

See @MickeyAO discussion on another thread
https://www.f150lightningforum.com/forum/threads/running-the-battery-to-0.18974/post-382019

 

[Helium]

See @MickeyAO discussion on another thread
https://www.f150lightningforum.com/forum/threads/running-the-battery-to-0.18974/post-382019

You are a beautifully handsome and intelligent person, may your children only bring you honor and glory!

 

[Jim Lewis]

There have been a lot of posts on the forum in various threads proclaiming that the manual recommends charging to 90% SOC, so that's what I'm going to do every day... Some of us pointed out that Ford has marketing reasons to limit range anxiety, etc., for making that recommendation. I've even pointed out a State of Charge YouTube video with Tom Moloughney where Darren Palmer, Vice President of Ford's Electric Vehicle Program, said that suggestion was made to wean owners away from their average proclivity to charge to 100% every day.

At any rate, today I came across a Ford website Healthy Battery Habits page. The noteworthy thing about the page is it emphasizes staying ANYWHERE between 20% and 90% SOC where practical and sticking with, at most, level 2 AC chargers, again, where practical, as much as possible.

https://www.ford.com/support/how-tos/more-vehicle-topics/batteries/healthy-battery-habits/

As before, if you're planning on trading in your vehicle in a couple of years, what's to matter except maybe a ding in trade-in value if your battery SOH isn't so great. But if you plan on keeping your vehicle for a long time and want to retain the most capacity at high speed and in cold weather, a penny saved is a penny earned...

 

[Traconesu]

Hi folk. This forum has been VERY useful. I finally got my truck last Saturday. I work about 3 miles from my home and some days may only travel 10-15 miles.

My question is this: for the health of the battery should I run it down to say, 25% over several days, or plug it in every night? Or does it matter?

Thanks in advance.

I've been charging off my home solar system, so I plug in whenever I have excess solar power. Sometimes it takes several days of charging to get to my set 85%. I seldom discharge to less than 50%.

 

[Basis0439]

85%er over here!

 

[Traconesu]

Hi folk. This forum has been VERY useful. I finally got my truck last Saturday. I work about 3 miles from my home and some days may only travel 10-15 miles.

My question is this: for the health of the battery should I run it down to say, 25% over several days, or plug it in every night? Or does it matter?

Thanks in advance.

When I first got my lightning platinum in 2022 they told me to only charge it to 80% unless I was going on a trip then charge to 100%. I was having trouble getting my ota updates so they told me to start charging to 85%. Lately I've been seeing charge to 90% for best battery life. Lately I've been charging my truck with my solar system and to just 85% , but I can only charge on days that have full sun all day long so sometimes it takes several days to get my truck charged to 85%. I guess I'll have to change my setting to 90%. Close to an entire month now without using any grid energy to charge my truck.

Sponsored