Lelik wrote:After discharging to 20% and charging back to 100% cell #1 showing 4.10v the rest showing 3.88-3.90v, so it’s clear that the cell#1 is bad. The temperature above cell#1 was 33C and the rest 28C. ...
Yes. Cell #1 has gone bad.
Technical details -
The Soul EV battery pack has 192 polymer pouch type cells.They are laid out in a series string of 96 sets of 2 parallel cells. A group of 12 cell pairs form a module. There are 96 cell voltage sensors, and 8 module temperature sensors.
Cell #1 is in module 1. Because Cell #1 has gone bad it heats up faster than the rest, hence the temperature of module 1 is higher than the rest.
The car normally charges until the cells reach about 4.12V, (it depends on the temperature). When one cell is bad the car stops charging early.
I have a Hyundai BlueOn electric car with a single bad cell, and this behaviour matches what you are seeing.
Kia has never 'fixed' a faulty cell by replacing just the one cell. They have always replaced the entire pack. I assume that this is easier for the local mechanics. Kia has never been pro-active in fixing a pack that is failing, they will only do a replacement after the SOH has reached 70%. However once a cell has gone bad the entire pack will deteriorate quickly. You will be getting a new pack soon. And luckily for you it will probably be a 30kWh pack that replaces your existing 27kWh pack.
This issue is also talked about here - Battery Ageing Model
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.