at first: you do great work!!!
Today I tested Id 374 in field D1 and can definitly confirm that this is the SOC for Peugeot ION. To do that I used a Peak-Systems PCAN USB Interface with the software PCAN-View. The sw simply shows all CAN-Msg's that can be received on OBD2.
These are the notes I made:
The car was full charged at the beginning. Do you Guys also have CF[x16] when full charged?
I also wrote a software that writes this CAN-Msgs in a SQLite database next to GPS NMEA sentences and high resoluted 3-axis accelerations using PCAN Interfaces. I could post such a database if you guys like to. I had the idea to run some linear regressionanalysis
on the data to find more informations. I don't know yet how to do this, but will find out
My next step will be writing a software that shows the decrypted values in a Windows-GUI. I will write it with C# using the mentioned hardware. I will post the sourcecode too. Maybe this will help you doing the same with your interface-hardware.
And can you guys tell me how you found out about the cell volts? Did you measure with a multimeter and compared with the CAN-data? I want to do something similar for a Peugeot Partner E Venturi.