[seanauff]

Interesting idea. Could you describe more ?

Do those step changes happen at the same time as a temperature reading increase? Perhaps a charge current limit indication? Do you have data from each battery module? Do they behave similarly?

 

[seanauff]

Do we have a spreadsheet/database of all of these discovered PIDs with a description, decoding instructions, etc? I started to put one together from the various threads on here plus at OVMS but don't want to duplicate effort. Happy to share what I've started putting together if this doesn't yet exist.

 

[Ayepace]

@seanauff see https://www.i-paceforum.com/threads...com/threads/parts-numbers-descriptions-and-names.6839/?post_id=68981#post-68981
and https://www.ipaceforums.co.uk/threads/canbus-and-pid-for-the-ipace.4280/?post_id=58605#post-58605
and https://www.ipaceforums.co.uk/threads/obd-ii-pid-and-torque-pro.4581/?post_id=62353#post-62353
and https://www.ipaceforums.co.uk/threads/my21-ecus-and-pids.4463/?post_id=60963#post-60963

 

[dernotte]

Do those step changes happen at the same time as a temperature reading increase? Perhaps a charge current limit indication? Do you have data from each battery module? Do they behave similarly?

No, they are not completely in sync.
And no, I only collected the module #1 but I have another long journey tomorrow. I will try to modify my code (on my OVMS box) to collect more that 1 module.

 

[dbwarrior]

I charged my battery first time to full(after h484) and now we know what happens what happen when voltage values reach out 0xFFF.
They just roll out:

So 0x016=4118mv

 

[Trielectric]

Do we have a spreadsheet/database of all of these discovered PIDs with a description, decoding instructions, etc? I started to put one together from the various threads on here plus at OVMS but don't want to duplicate effort. Happy to share what I've started putting together if this doesn't yet exist.

Dernotte has a good list on PIDs on and off this site.
Parts numbers , descriptions and names | Page 2 | Jaguar I-Pace EV400 Forum (i-paceforum.com) #26

 

[dernotte]

I have captured the 7th byte for each of the 36 modules during a 170km journey and put them on a graph, but can't find the rational. Maybe someone here will be able to help. Here is the graph, and the log file. Some modules kept the same value during the entire journey, some changed a couple of time.

 

[jeffreycooper1963]

Here custom sensor for requesting data from module1 via car scanner App
View attachment 8786

And here is reslut when you hit "test" button:
View attachment 8787

Hi, forgive the rude interruption, but I'm working on a "carscanner" dashboard with help from D.Ernotte over on the UK forum, and I pointed out to him that on your two pictures above, the first picture shows a query to module 06, and yet the test result picture shows an answer coming from module 01 - is this merely a mistake on the pictures you chose to show here please ?

 

[dernotte]

FYI: I don't know if Autel monitors this forum, but they have released the V1.6 for the Jaguar module in their scanner, and one of the new feature is related to individual data (volt, ...) of the 36 cells in the battery.

 

[dbwarrior]

FYI: I don't know if Autel monitors this forum, but they have released the V1.6 for the Jaguar module in their scanner, and one of the new feature is related to individual data (volt, ...) of the 36 cells in the battery.

View attachment 9099

Interesting.
If we decrypt that missing part maybe will see next update

 

[jeffreycooper1963]

FYI: I don't know if Autel monitors this forum, but they have released the V1.6 for the Jaguar module in their scanner, and one of the new feature is related to individual data (volt, ...) of the 36 cells in the battery.

View attachment 9099

Out of interest, is it possible to download the Autel update file directly ?

edit - no it isn't as far as i can see !!

 

[dernotte]

@jeffreycooper1963 I am afraid not. It must be a proprietary file probably encrypted with a private key that we don't have, in a proprietary format.

 

[Ayepace]

Three cells per module voltage report.

 

[dernotte]

Three cells per module voltage report.

Yes, I need to double check the data in this report again my finding on the Canbus to see if everything aligns.

 

[hughmama]

Thank you all so much for this excellent information. I have been able to get readings for for the first 24 modules on my I-Pace but when I try for 25-36 I just get:
7EC037F3131
as below

For context I have a bad cell in module 29 and the battery is only currently taking around 40kwh (it might be less now) I have an I-Pace imported from Japan (to NZ) and Jaguar cancelled the battery warranty when I imported it so I have to figure the best way to sort this issue without getting robbed by my dealer who want to charge me $3000 US for a single replacemen

 

[dernotte]

It may be caused by a timeout ? A 7F code is an error code. I would wait a bit, in order to let enough time to the car to reset the module and for you to reuse the initial seed. Then start querying the missing data.

 

[dernotte]

@hughmama your problem comes from the fact that the cell number should be entered in Hexadecimal format. When you use “24” it is in fact 36 (2*16+4), and 36 is the last cell number

 

[hughmama]

@hughmama your problem comes from the fact that the cell number should be entered in Hexadecimal format. When you use “24” it is in fact 36 (2*16+4), and 36 is the last cell number

This has been a massive help to me thanks so much. The local dealer is not responding to my questions at all.

Now I have been able to check all modules twice and confirm I have one bad pouch in module 29.

Interestingly I had read somewhere in the forums that the car would deactivate 9 modules (1 string?) if a single bad one was detected. This seems false. All modules are charging and discharging even with the fault code on Module 29. So I have to conclude that the BMS is simply reducing voltage range (adding more buffers) as the single pouch further degrades.

Now I can properly pursue the replacement of the faulty module and given the rest of my modules are showing SOH of 93-95% and I have not seen any other fault codes that might suggest temp issues have been detected - and the temps stayed low during charging (18-19C) - I'm hopeful that I'll get back full battery capacity when the dealer resets the BCM

 

[dernotte]

@hughmama can you confirm with PID 4A7C and 4A7D on ECU 7E4 that module #29 is problematic. Those PID should give you a array of 96 values, 3 values per module. You should see a higher value for module #29.

 

[hughmama]

@hughmama can you confirm with PID 4A7C and 4A7D on ECU 7E4 that module #29 is problematic. Those PID should give you a array of 96 values, 3 values per module. You should see a higher value for module #29.

Oh interesting. Can absolutely do this. Sorry but do I need to use the terminal to do this? I was able to follow your other instructions but that is the sum of my experience with PIDs