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JejuSoul, sorry I'm not as familiar with SoulSpy. For the example you posted above, do you have the mapping to PIDs and the equations used? Also does "SOC_precise_pt" map to BMS SoC and "SOC_pct" map to Display SoC or is that "SOC_display_pct" which is empty?

You are close IanL but BMS SoC and SoH differ in three ways: 1. They will only be similar at 100% display SoC. As you use energy, SoH will stay the same while BMS SoC will decrease based on lowest cell voltage. 2. BMS SoC will be lower than 100% in most cars with top buffer. Eg if BMS...

Sorry I worded poorly - I understood that first picture was original pack and second was remanufactured pack - I was just pointing out that the temp was low and difference small in the second picture which kimdavi confirmed was taken after charging overnight. My guess is that they are using...

68% is the BMS SoC which tracks how much usable capacity your battery pack has remaining. Display SoC will always show 100% at full charge as it scale the BMS SoC. For example, at ~34% BMS SoC, your Display SoC will show 50%, etc. It looks like your battery pack is failing fast if it dropped...

Regarding temperature, it looks like the second picture was taken well after the car finished charging (overnight?). Can you confirm kimdavi? I say that because in the second picture, the temperature is much lower than the first and the temperature difference between the modules aren’t that much...

If you balanced the cells and the voltage differential doesn’t shrink, that means the degraded cells are refusing to go higher SoC/voltage and converting the extra energy into heat instead. The car also monitors if max cell’s voltage doesn’t change after charging for a while and stops charging...

At 100% display SoC, your max cell is 4.18v and min cell is 3.86v. Low voltage cutoff is ~3.0v. That means your effective voltage range is 3.86v - 3.0v or 0.86v. A new battery should give you 4.18v - 3.0v or 1.18v range of potential. 0.86v / 1.18v = 72.9% of actual SoC vs display of SoC 100%...

Not sure if this is useful to anyone but here's the voltage vs SoC I measured when my Kia Soul 2018 was new. Data was taken after letting the battery voltage settle for at least 30 minutes after driving or charging. I'm missing data below 9% because I was babying the car back then and rarely...

Well with limp mode you are basically doing extreme hypermiling so you’ll get really impressive distance (see pic) I suspect SOH is not working for some reason.

Interesting. Explains why Kia wants people to charge their car to 80% before brining in their car for battery check.

Wow that is a degraded battery! I guess they replaced your pack with a reassembled one?

When Chevy bought my Bolt, it was whatever I paid minus a some cents for every KMs driven. With around 25,000 kms driven Chevy covered around 90% what I paid for the car which was far, far above what the market price would have been. Sounds like Kia is taking a much worse approach.

Hmmm can you provide source? The only lithium battery chemistry that can go down to 2.5v safely is LFP and LTO which is not used by Kia Soul. Our battery chemistry can only go down to 3.0v before permanent damage occurs.

No sorry typo…4.2v - v1.4 = 2.8v. Typing on a phone :|

If an EV had deviation of 1.4V that would mean the car won’t be able to drive at all. One or more cells would be below 2.8V when the car is fully charged (3.2V - 1.4V). I believe that’s well below 0% SoC for the lithium cells and below cut off point.

Is there an official recall for this second BMS update and all cars will get the update or will it only be done after the car goes into limp mode?

Knock on wood but so far no limp for me with BMS update. 2018 and never had my battery pack replaced.

I wouldn’t worry about warranty expiring. Recalls are not impacted by warranty.

Sorry if I missed it but once you enter limp mode, I am assuming it’s limited by kW and not absolute speed? What is the limit for power?

Does this mean that everyone that got the BMS update will eventually go into limp mode until the next software update?