99.4% SoH after 100,000 km on my 2021 J1.1 -- Can it be true?

[Evgeny]

Yesterday I have reached a 100,000 km milage with my J1.1 2021 CT Turbo. I decided to check the max charging capacity of HV battery. After draining the battery till 1% and charging to 100% I have noticed 82,4 kWh charged what equals to 99,4% SoH assuming 83,7 kWh of total net capacity. Can it be true or I do the wrong calculation?

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[DP_Taycan]

Not sure if this is an accurate way to assess SoH.

I had my car in recently for recall work and asked them to check the SoH. 56k miles and I’m at 85%.

 

[SergeyIndy]

Impressive mileage but that is not how you measure SoH and your battery capacity, since what you are showing will include losses.

The way we measure it here with high accuracy is using an OBD reader and CarScanner app. Get those and come back and let us know what you have.

Start here: https://www.taycanforum.com/forum/t...tery-degradation-data-by-taycan-owners.12815/

 

[Sace]

Impressive mileage but that is not how you measure SoH and your battery capacity, since what you are showing will include losses.

The way we measure it here with high accuracy is using an OBD reader and CarScanner app. Get those and come back and let us know what you have.

Start here: https://www.taycanforum.com/forum/threads/-baseline-for-hv-battery-soh-performance-battery-degradation-data-by-taycan-owners.12815/

"High accuracy" - I have seen mine vary 5% depending on charge pattern. I would agree that right after calibration it's likely pretty accurate but if you just plug it in after 100kkm it could be off by a bit.

 

[SergeyIndy]

"High accuracy" - I have seen mine vary 5% depending on charge pattern. I would agree that right after calibration it's likely pretty accurate but if you just plug it in after 100kkm it could be off by a bit.

Several forum members reported that the accuracy is within 1% from full on dealer test. Rebalance improves SoH temporarily by as high as 3% but then goes back to normal trend. By trend, I mean when I trend mine every 1k miles, it goes along a smooth line, then after rebalance it pops by 3% and then goes back to the smooth line. The value that matters is when you are close to the warranty levels of 80% and then 70%. Anything above that is just what it is. The other benefit of this trending is to catch any sudden drop in SoH that would indicate a bad cell.

 

[Sace]

Well, I can say that mine changed 5% (84 to 89%) and have stayed within 1% of the "new" value for the last 3000km. It seems really dependent on how my charging habbits are. Looking at the actual range of the car it also matches better with the high value than the low.

The only tests the dealers will do around here is reading out the same value as we do so I have never seen how well they compare.

Again, I'm not saying that the OBD readout is not useful, just that a full cycle test is the only real accurate thing.

 

[2P168S]

Yesterday I have reached a 100,000 km milage with my J1.1 2021 CT Turbo. I decided to check the max charging capacity of HV battery. After draining the battery till 1% and charging to 100% I have noticed 82,4 kWh charged what equals to 99,4% SoH assuming 83,7 kWh of total net capacity. Can it be true or I do the wrong calculation?

This is the energy delivered by the EVSE, which includes energy that go to losses. Subtract 10-15%

 

[DerekS]

I hadn't heard the 2025 is limited to 9.6.
Upgrading from '23 has been a mixed bag. : |

I now want to find a 60 amp level 2 and try it.

 

[69Mach390]

This is the energy delivered by the EVSE, which includes energy that go to losses. Subtract 10-15%

This^^

The OP is measuring the volume of a cup by measuring the amount of water to fill it using a leaky hose.

Gotta account for the waste energy.

 

[Dee]

Yesterday I have reached a 100,000 km milage with my J1.1 2021 CT Turbo. I decided to check the max charging capacity of HV battery. After draining the battery till 1% and charging to 100% I have noticed 82,4 kWh charged what equals to 99,4% SoH assuming 83,7 kWh of total net capacity. Can it be true or I do the wrong calculation?

Did you start charging directly after driving?
If the battery is showing 1% SoC it'll climb to 4-5% cuz the battery will settle and cool down after a while.

Edit: do you have PB+?

 

[Dee]

This is the energy delivered by the EVSE, which includes energy that go to losses. Subtract 10-15%

No it isn't.
That 82,4 kWh is exactly what amount is used.
The SoC was probably not 1% but much higher due to settling of the battery after driving.

This is my exact consumption from 0 to 100%.

It's from the topic where I have rebalanced my battery:
https://www.taycanforum.com/forum/threads/how-to-recalibrate-your-soh.21096/

 

[2P168S]

No it isn't.
That 82,4 kWh is exactly what amount is used.

Said another way, that screen is showing the integral with respect to time of current x voltage, with the current and voltage sensors both residing within the EVSE. Interpret as you wish accordingly.

 

[RED!]

I posted this last night in another thread. Here’s my 60amp circuit fed 48amp grizzly charger feeding my car, note the difference between what the charger is putting out and the car is taking in. The car was very cold (sat undriven in a Toronto garage so around 32f/0c for 12 hours) Im guessing the difference is the battery getting heated and cable losses.

 

[SergeyIndy]

Well, I can say that mine changed 5% (84 to 89%) and have stayed within 1% of the "new" value for the last 3000km. It seems really dependent on how my charging habbits are. Looking at the actual range of the car it also matches better with the high value than the low.

The only tests the dealers will do around here is reading out the same value as we do so I have never seen how well they compare.

Again, I'm not saying that the OBD readout is not useful, just that a full cycle test is the only real accurate thing.

I agree that the full cycle test is the only real accurate reading for warranty purposes. OBD readings are meant to be a monitoring measure to detect any sudden trend so then you have reasonable doubt that cells are going bad for the dealer to do full cycle test.

 

[69Mach390]

Bottom line? This isn’t how you measure state of health and NO the OP doesn’t have a 99% state of health.

This isn’t an accurate measuring stick.

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