Battery SoH @ 31 months 88k miles

[axelheimer24]

Same here. Before at 85% I would get 240. After last up dates 5.1.1 and 6.1. Now I get 211 at 85%. I just reset gom to see if it will work itself back up.

Don’t worry, you still get the same range - regardless of what the GOM says. I find it much easier to focus on the SoC, which is always accurate. I rarely looked at the GOM on ICE, just good to know when you have less than a quarter tank.

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[Mach1E]

Don’t worry, you still get the same range - regardless of what the GOM says. I find it much easier to focus on the SoC, which is always accurate. I rarely looked at the GOM on ICE, just good to know when you have less than a quarter tank.

Well……. To be clear even the state of charge isn’t very accurate either.

Some people have tried to use state of charge to calculate efficiency and in turn created a huge long thread of people arguing back and forth about 1 PD and BC efficiency…… until we realized the OP was calculating miles driven per 10% of charge.
https://www.macheforum.com/site/thr...d-destination-chargers-even-tesla-good.30077/

And of course it wasn’t even remotely accurate.

Measuring electrons is more of a guess than measuring the volume of gasoline for example.

 

[axelheimer24]

Well……. To be clear even the state of charge isn’t very accurate either.

Some people have tried to use state of charge to calculate efficiency and in turn created a huge long thread of people arguing back and forth about 1 PD and BC efficiency…… until we realized the OP was calculating miles driven per 10% of charge.
https://www.macheforum.com/site/thr...d-destination-chargers-even-tesla-good.30077/

And of course it wasn’t even remotely accurate.

Measuring electrons is more of a guess than measuring the volume of gasoline for example.

That’s fair - I opened myself up to debate by saying “always accurate.” My point is that for most people, most of the time, it doesn’t really matter. Road trips, particularly in places where there are long distances between DCFC is when all this math and planning is needed. Day to day just plug in at night and enjoy.

 

[RandyMache]

Dang, if you only drive on weekends you must take looooooong drives to have racked up 88K miles in 2 1/2 years! ?

I agree, something doesn’t seem right about his claim…..

 

[JohnFoxeSheets]

I agree, something doesn’t seem right about his claim…..

He clarified

 

[RandyMache]

Seems pretty good.

On a related note- our warranty covers 70% SOH at 8 yrs/100k.

If our battery SOH ever goes below 70%, how would a normal person know? Would it trigger a service engine light?

Also related- is that warranty on SOH pretty much worthless? I haven’t heard of a single warranty claim because of it. Kinda like my mileage warranty on my tires. ?

My thought is, charge it to 100% everytime everyday. If you can get it below 70% as a full charge, you get a new HV battery pack. Why are we all so concerned about charging up to 80% because it’s good for the battery. Screw that, 100% charge is not 100% charge, when there is another built in 10% or so, that Ford has on the top and bottom end. Just like an iPhone. Run it and drive it like it’s yours. I would hate any other company / product, to sell me something then tell me to only use 80% of it. By the way, I think Ford and every other manufacture implies to charge to only 80% so they don’t have to change it out under warranty. But that is just my opinion. All of this is just my opinion. This is how we learn.

Ok, now tell me how wrong am I? I love these conversations……!

 

[jeffdawgfan]

I agree. Charge it like you own it. I charge to 100% every time I charge (2-3 times weekly). But, I have only DCFC this car once in 2 1/2 years. The only long road trips I take are with camper and the truck pulls that.

 

[George Knighton]

88,080 miles in 31 months
Ext AWD Premium
43,983 miles on second HVJB
74 degrees outside
100% charge showing on dash but that conflicts with what data shows of 96.1%
State Of Health 89.5%

Of course I know this info is not 100% accurate, it still gives a good idea of where we are with this many miles and the state of health. The past readings have been between 88-90%.

Thanks very much for taking the time to provide quantifiable data.

That’s awesome if you ask me.

I tend to agree. It's certainly not bad.

There is a prolific YouTube poster who's owned a 2017 Bolt EV since new, and those of us who've owned Bolts tend to follow him.

He wasn't called in for his battery replacement until he had 154,000 miles on his car.

He took the opportunity to drive until an indicated 0% state of charge, and then charged to full.

In actual kWh capacity, he only lost 10% over 154,000 miles.

I think maybe we worry about this too much, and it's probably a result of the publicity surrounding Tesla batteries that tend to lose 10% right off the bat.

 

[ckt]

Please post a follow-up when you reach 100k miles. By then the battery warranty is out, and very curious does the bms unlock more capacity?
You might be able to check via cell voltage. Assuming when new 0% SOC was 3.4v, perhaps after 100k miles, the cell voltage might be unlocked further at 3.0v when 0% SOC.

 

[dixiekidd88]

Please post a follow-up when you reach 100k miles. By then the battery warranty is out, and very curious does the bms unlock more capacity?
You might be able to check via cell voltage. Assuming when new 0% SOC was 3.4v, perhaps after 100k miles, the cell voltage might be unlocked further at 3.0v when 0% SOC.

I will certainly update the post when it gets there. Just rolled over 93k right now so will prob be after the 1st of the year but who knows at this point haven't decided if we are going to take it on our trip for Thanksgiving or not. Concerned still with the HVBJB issues, although being on the third one that has lasted the longest seems fine.....

 

[thekat03]

Thanks very much for taking the time to provide quantifiable data.


I tend to agree. It's certainly not bad.

There is a prolific YouTube poster who's owned a 2017 Bolt EV since new, and those of us who've owned Bolts tend to follow him.

He wasn't called in for his battery replacement until he had 154,000 miles on his car.

He took the opportunity to drive until an indicated 0% state of charge, and then charged to full.

In actual kWh capacity, he only lost 10% over 154,000 miles.

I think maybe we worry about this too much, and it's probably a result of the publicity surrounding Tesla batteries that tend to lose 10% right off the bat.

I think a lot of concern over battery health is also based on the Leaf, which only used air cooling for the batteries.

 

[Auto Motive]

I have posted updates prior with SOH on the battery and was advised to get better accuracy to have charge at 100% and 70s outside temp. Here are updated numbers:

88,080 miles in 31 months
Ext AWD Premium
43,983 miles on second HVJB
74 degrees outside
100% charge showing on dash but that conflicts with what data shows of 96.1%
State Of Health 89.5%

Of course I know this info is not 100% accurate, it still gives a good idea of where we are with this many miles and the state of health. The past readings have been between 88-90%.

Good analysis. Did you ever replace your 12v battery?

 

[dixiekidd88]

Good analysis. Did you ever replace your 12v battery?

The 12V was replaced at the same time the first HVBJB was replaced around 27k/8 months of ownership.

 

[dixiekidd88]

We did just complete a full 800 mile round trip and are over 95k now and the SOH for the HVB is still at 88%.

 

[Pioneer74]

We did just complete a full 800 mile round trip and are over 95k now and the SOH for the HVB is still at 88%.

Are you seeing a big difference in miles you're able to travel compared to when the car was new?

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