[VW TECHNICIAN]

John;
I took some screen shots which, I hope, address some of the data that you thought could be useful. I very well may have misinterpreted some of the info, so bear with me.

• voltage in all cells (histogram) -- See attached, it shows one cell (91?) significantly lower than the others.
• Maximum battery energy content and HV battery energy content --HV Battery content = 43,525; Maximum battery energy content = 72,950
• BMS SOC vs. SOC on display, SOH -- BMS SOC = 78%; Display is 80%
• min / max cell SOC %, min / max cell voltage -- cell 91 has min cell charge and highest voltage (62.92%/4.01)
  Cell 90 has max SOC 81.82% and cell 92 has the lowest voltage 3.81
  
  I've attached the screen shots, if that helps. I do have an appointment on the 19th with the dealer but I want to know at least as much as they might. One clue. this all seemed to happen after they dealer did my 10k "nothing" service. Have no idea what they did or didn't do. Appreciate any thoughts or suggestions.
  Ed View attachment 15085 View attachment 15086 View attachment 15087 View attachment 15088 View attachment 15089 View attachment 15090

Ypu will need to charge it to 100% then live it off not using vehicle for 4-6 hours then check again for cells voltage high and low. If balanced, take vehicle for 5 miles drive minimum without aggressive acceleration or using B mode. After return to the L2 charger or L1 charge it again to 100% and wait for 4- 6 hours and check again cells high and low V.
If all corrected, continue keeping eye over time with battery pack cells balance and high and low imbalance. If it continues going like what you posted have your vehicle back to service department for further diagnostics.

 

[ddx]

Is this how to "share pid" ?
I'm not really using everything, just to make easy to do a screenshot and record the data on my spreadsheet. I added MPH when one time my speedo went blank
I use OBDLink LX it has been working great.

 

[Ebennettr]

Thank you. No change in issues but the good news is that I can explain to the dealer what we found. Be safe

Ypu will need to charge it to 100% then live it off not using vehicle for 4-6 hours then check again for cells voltage high and low. If balanced, take vehicle for 5 miles drive minimum without aggressive acceleration or using B mode. After return to the L2 charger or L1 charge it again to 100% and wait for 4- 6 hours and check again cells high and low V.
If all corrected, continue keeping eye over time with battery pack cells balance and high and low imbalance. If it continues going like what you posted have your vehicle back to service department for further diagnostics.

 

[VW TECHNICIAN]

Is this how to "share pid" ?
I'm not really using everything, just to make easy to do a screenshot and record the data on my spreadsheet. I added MPH when one time my speedo went blank
I use OBDLink LX it has been working great.

View attachment 15191

Yes and OBDLink MX is one of the first dongles they started on market, i do have it also so you are covered with ability to pull data. If you can start new thread with pids and screens you are using so you can help others with carscanner app .

 

[Ebennettr]

Stupid question but what does “pod” mean?

Yes and OBDLink MX is one of the first dongles they started on market, i do have it also so you are covered with ability to pull data. If you can start new thread with pids and screens you are using so you can help others with carscanner app .

 

[SunWizard]

Stupid question but what does “pod” mean?

Its PID which is Parameter Identification. It just means which data stream you are watching.

 

[VW TECHNICIAN]

Its PID which is Parameter Identification. It just means which data stream you are watching.

So many times you save the day.

 

[JimMacNair]

I am interested in Carscanner or Car Scanner but not sure if I am finding the right thing with Google, who as usual is trying to sell me something else. So how do I actually find the car scanner that is being used in some of the posts above. Also what dongle are people using? I assume it is some kind of commercial dongle that I can buy.
Jim MacNair

 

[John411iD]

Here is the Android app:

Car Scanner ELM OBD2 - Apps on Google Play

Trip computer+car diagnostic tool with widest variety of features and dashboard!

play.google.com

Same app on iOS:

‎Car Scanner ELM OBD2

‎Check what your car is doing in realtime, get OBD fault codes, car performance, sensor data and more! Car Scanner is a vehicle / car performance / trip computer / diagnostics tool and scanner that uses an OBD II Wi-Fi or Bluetooth 4.0 (Bluetooth LE) adapter to connect to your OBD2 engine...

apps.apple.com

 

[VW TECHNICIAN]

I am interested in Carscanner or Car Scanner but not sure if I am finding the right thing with Google, who as usual is trying to sell me something else. So how do I actually find the car scanner that is being used in some of the posts above. Also what dongle are people using? I assume it is some kind of commercial dongle that I can buy.
Jim MacNair

Most reliable and tested by me are OBDLink MX + and OBDLink CX BLE Bluetooth.
There is plenty discussion on this matter so if you decide to go this route, invest in good quality dongle that has regular firmware updates. You can try free version of carscanner app before you buy full version. If you want my opinion on this app, it is worth every penny and has coverage not just for ID4 but many other manufacturers all over the world .

 

[josph]

What is Cell Imbalance? If lithium cells are overheated or overcharged, they are prone to accelerated cell degradation. They can catch fire or even explode as a thermal runaway condition can occur if a lithium ion cell voltage exceeds 4.2 V by even a few hundred millivolts. One cause of imbalance is when cells have different coulombic efficiency, another is when cells have different self-discharge rates. Another is when cells have different leakage currents. All of these effects tend to be amplified by differences in temperature from one cell to another.

 

[Mikbee]

Same thing happens to me. Today I went from 90% to 3% drove 147 miles, 60 degree day, eco mode, no ac. Screen says I averaged 3m/kwh

 

[VW TECHNICIAN]

Same thing happens to me. Today I went from 90% to 3% drove 147 miles, 60 degree day, eco mode, no ac. Screen says I averaged 3m/kwh View attachment 18170

Care to provide battery cells delta , highest and lowest battery cells voltage?

 

[Mikbee]

Care to provide battery cells delta , highest and lowest battery cells voltage?

 

[John411iD]

Would you mind sharing another screen with voltage in all cells? That screen will show if only 1 or more cells are out of balance.

 

[Mikbee]

View attachment 18176

Would you mind sharing another screen with voltage in all cells? That screen will show if only 1 or more cells are out of balance.

Background: just had two cells replaced. Had electrical warning. Don't have all they did with me but can later in week. The following are just now prior to charging.

 

[ddx]

Did they forget to balance the new battery cells? Or is this normal for mixing new / old battery cells?

 

[VW TECHNICIAN]

Background: just had two cells replaced. Had electrical warning. Don't have all they did with me but can later in week. The following are just now prior to charging. View attachment 18179
View attachment 18177
View attachment 18178

Did you had any battery pack repairs ( like module replacements or other parts changes on HV DC pack)

 

[VW TECHNICIAN]

Did you had any battery pack repairs ( like module replacements or other parts changes on HV DC pack)

You will need to charge with L1 to 100% SOC and live it on for another 24 hours before taking this measures again if they did module replacements.

 

[VW TECHNICIAN]

And set it on 8A for L1 charging.