What is your SOH, Mileage, and how do you use your Battery?

[VirtualTed]

Could be BMS drifting is an issue. Basically without going down to near zero, or 100% the BMS can lose track of actual. The SOH you are seeing is what the BMS thinks, and that may not be entirely accurate. Many people charge to 100% occasionally for this reason. I have read that the remedy is to run it to near zero, then in one continuous charge to 100% (meaning it shuts off on its own). This also has the effect of leveling all cells, meaning evenly charged which can throw off SOH calculations as well. Lastly, it's not just battery usage, it's also age of the battery pack, and environment, especially very high temps. But of course you may have a weak cell or two.

Try deep discharge to absolute full charge. Just keep it either end for as little time as possible.

That's a great idea. I have only taken it to about 20% once and I took it to 100% about 4 months ago on a short trip, and then immediately began the drive. I do live in Las Vegas, and it started hitting 105F a day here, so that may have had an effect too.

I also recently had a couple recalls done (front sensors and front hatch control module on May 5). The timing is suspicious...

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[VirtualTed]

That does seem like a fast drop. Have you had any software updates to BMS in April? I am thinking if it stayed at 100% for that long, may be it has been lying to you all this time and now it is trying to tell the truth a little at a time.

My dates are estimates of when I thought I saw those numbers. I did get some recall software changes done on May 5th, so the timing is in the ballpark.

 

[TaxmanHog]

Mileage

 

[VirtualTed]

Mileage

Just hit 30k.

 

[TaxmanHog]

Just hit 30k.

NIce ........ I corrected the thread title TYPO...... carry on.

 

[MTBAZ]

22 LR Phoenix AZ truck. Never inside.
32,000 miles.
48A L2 to 80% 99% of the time
DCFC - maybe a dozen times
Charged to 100% maybe 3 times a year.
SOH - 98.5%

 

[Maxx]

NIce ........ I corrected the thread title TYPO...... carry on.

Thanks.

I worked on learning this language for a few decades before I gave up.

 

[electricpig]

That's a great idea. I have only taken it to about 20% once and I took it to 100% about 4 months ago on a short trip, and then immediately began the drive. I do live in Las Vegas, and it started hitting 105F a day here, so that may have had an effect too.

I also recently had a couple recalls done (front sensors and front hatch control module on May 5). The timing is suspicious...

I forgot to specify, Level 2 charging is what I've seen specified when going from near zero (below 5%) to 100%.

Let us know the results of you do this Good luck.

 

[Kniaz]

23 LR ER Sacramento CA truck. Never inside. 18 months
65.321 miles.
80A 17.6kwt L2 to 100% of the time every day
DCFC -1 time per week
3 times discharge 0% stay too line street . my wife came and charged me with her truck (same white color)
SOH - 99.52%

 

[Maxx]

SOH - 99.52%

what do you use to see SOH with that level of detail? My car scanner shows me only to one decimal point and even that is only 0 or 5.

 

[jimfigler]

someone on Facebook reported the app gave 100% SOH when he had a bad module, so I take zero faith in that number.

 

[Kniaz]

someone on Facebook reported the app gave 100% SOH when he had a bad module, so I take zero faith in that number.

My real range 240-252-268 miles. 80% highway 75 speed. Ful load staff 700 pounds

 

[WaterboyNorCal]

Could be BMS drifting is an issue. Basically without going down to near zero, or 100% the BMS can lose track of actual. The SOH you are seeing is what the BMS thinks, and that may not be entirely accurate. Many people charge to 100% occasionally for this reason. I have read that the remedy is to run it to near zero, then in one continuous charge to 100% (meaning it shuts off on its own). This also has the effect of leveling all cells, meaning evenly charged which can throw off SOH calculations as well. Lastly, it's not just battery usage, it's also age of the battery pack, and environment, especially very high temps. But of course you may have a weak cell or two.

Try deep discharge to absolute full charge. Just keep it either end for as little time as possible.

Exactly this. Ya’ll need to take Rick’s advice and relax. The SOH that is showing on an OBD2 reader or Forscan is just an estimate and can be quite inaccurate due to BMS calibration issues. Just drive the truck. Only if something is really wrong (like the guy who is looking at 77% SOH at less than 40k miles) would I start to be concerned.

My 2023 SR is indicating 97% currently at 40,000 miles driven/18 months since delivery, but I suspect the actual degradation is lower than 3%. When I first looked at the OBD2 scanner after 28k miles and 11 months of ownership, it showed 97.5%. Over the past 7 months, the SOH has varied between 96-98%, and yes, sometimes it goes up, due to the aforementioned calibration issues, as well as pack temperature and SOC when obtaining the readings. You really need to do a full discharge to below 10%, let the truck sit for at least 5 hours, and then Level 2 charge until it stops accepting juice (this will be AFTER it indicates 100% SOC). Even then, if ambient temperatures are variable, you could get different results.

 

[jimfigler]

My real range 240-252-268 miles. 80% highway 75 speed. Ful load staff 700 pounds

Awesome but what's that have to do with the SOH value from an app being unreliable?

 

[ctuan13]

someone on Facebook reported the app gave 100% SOH when he had a bad module, so I take zero faith in that number.

Yeah SOH is not enough on its own, you need to see module voltage variation and module SOC variation. Those are the most important metrics.

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