Battery degradation

[Earlofsandwich]

Your reading is lower than average, IMO. Definitely do the procedure Lee prescribed and see if that increases the SoH. Also, at 100% measure the Energy to Empty, and divide the EtE when new into that figure to see if it is close to your SoH. In my case, it is pretty close. Sometimes I can get more EtE than the SoH predicts, sometimes a little less. So it seems like SoH is pretty accurate as long as it is calibrated properly.

Every couple of weeks I charge to 100% for my work commute. I have done it a bunch of times. My SoH is 90.5%, and I have 42k miles on the odometer. That is quite a bit more than yours, and the SoH of my battery is lower than average from what I can tell.

I am using this thread to track the SoH of my battery, and compare that to what others are seeing:
https://www.macheforum.com/site/thr...e-of-health-how-much-decline-is-normal.26902/

I did the first few steps and charged to 100. My energy to empty went up from 62kwh to 66kwh but the SoH is staying the same.

Sponsored

 

[mkhuffman]

I did the first few steps and charged to 100. My energy to empty went up from 62kwh to 66kwh but the SoH is staying the same.

Sorry for the ignorance, but what is the max available capacity of your battery new? And if you divide 62 by that number, what is your real SoH?

 

[Earlofsandwich]

Sorry for the ignorance, but what is the max available capacity of your battery new? And if you divide 62 by that number, what is your real SoH?

Online it says 70kwh on the 22 select standard range but only 68 usable. So I am not sure if the calculation is based on us able vs actual. Based on those my percentage should be 88% (actual) vs 91% (usable).

 

[Ravensfan1996]

Online it says 70kwh on the 22 select standard range but only 68 usable. So I am not sure if the calculation is based on us able vs actual. Based on those my percentage should be 88% (actual) vs 91% (usable).

Are you noticing any change in range? I have ‘21 premium ER AWD with 24k miles. I checked my SoH last week and it showed 91% I usually keep my car between 70-90% and only charge to 100% a few times a year for long trips. I havent noticed any real change in range. I haven’t done the recalibration yet either but plan to try it soon. I work from home so its hard to get it down to 10% or less.

 

[Earlofsandwich]

Are you noticing any change in range? I have ‘21 premium ER AWD with 24k miles. I checked my SoH last week and it showed 91% I usually keep my car between 70-90% and only charge to 100% a few times a year for long trips. I havent noticed any real change in range. I haven’t done the recalibration yet either but plan to try it soon. I work from home so its hard to get it down to 10% or less.

Hard to say. Last summer my best range estimate was 400km today at 100% was at 350. We are just coming out of winter and my areas temps are still slightly cold.

what made me nervous is once a month I check the battery stats with car scanner and I noticed a 10% drop in health in one month. So that’s why I got worried.

 

[Mach-Lee]

what made me nervous is once a month I check the battery stats with car scanner and I noticed a 10% drop in health in one month. So that’s why I got worried.

The sudden drop was due to a software update that changed how and when SoH was calculated. There was not sudden battery degradation. Performing the calibration several times should help the reading be as accurate as it can be.

 

[Earlofsandwich]

The sudden drop was due to a software update that changed how and when SoH was calculated. There was not sudden battery degradation. Performing the calibration several times should help the reading be as accurate as it can be.

When performing the calibration a number of times do I still charge to 80% after the 1st 100% charge? Or do I go
10% -> 100%
10% - > 100%

 

[Mach-Lee]

When performing the calibration a number of times do I still charge to 80% after the 1st 100% charge? Or do I go
10% -> 100%
10% - > 100%

That's fine, if you're doing it multiple times you can do the 10-100% like that twice in a row.

 

[mkhuffman]

Online it says 70kwh on the 22 select standard range but only 68 usable. So I am not sure if the calculation is based on us able vs actual. Based on those my percentage should be 88% (actual) vs 91% (usable).

Divide EtE at 100% by the usable capacity, not the total capacity. When new, your car should have charged to 68 kWh at 100%, not 70 kWh. That is why you want to use usable capacity.

 

[Earlofsandwich]

Divide EtE at 100% by the usable capacity, not the total capacity. When new, your car should have charged to 68 kWh at 100%, not 70 kWh. That is why you want to use usable capacity.

That is the way I would calculate it. I am wondering if car scanner or their algorithms use total capacity

 

[mkhuffman]

That is the way I would calculate it. I am wondering if car scanner or their algorithms use total capacity

Not for SoH. But Car Scanner will provide the State of Charge, which is based on total battery capacity. State of Charge Displayed (SoCD) is based on usable capacity.

 

[Earlofsandwich]

So after completing two rounds of the procedure @Mach-Lee mentioned my SoH improved to 90%. I still think it’s a little low compared to the average. One thing I found interesting was that the ford pass app range was wildly off from what was in the car. Almost a 30km difference. Also the energy added was larger than my energy to empty. I am wondering if that is excess energy to warm the battery as preconditioning was off.

 

[mkhuffman]

So after completing two rounds of the procedure @Mach-Lee mentioned my SoH improved to 90%. I still think it’s a little low compared to the average. One thing I found interesting was that the ford pass app range was wildly off from what was in the car. Almost a 30km difference. Also the energy added was larger than my energy to empty. I am wondering if that is excess energy to warm the battery as preconditioning was off.

Actually 90% isn't unreasonable for the age and mileage on your car. It is on the low side, but that is how it works. Some get better SoH, some get worse. You don't need to worry about it, IMO.

 

[Earlofsandwich]

Actually 90% isn't unreasonable for the age and mileage on your car. It is on the low side, but that is how it works. Some get better SoH, some get worse. You don't need to worry about it, IMO.

Yes I’m actually a little less worried now. Getting down to the 85% was scary

Sponsored