Error: Electrical System. Stop!

[f1geek]

Weird. Clearly your car has issues. Bad cells and now a bad voltage sensor or software problem? Best of luck getting it repaired.

[somethingcool]

29 days after I had sent my car into the dealership I got my car back after some VW tech flown in from another state diagnosed and then returned later to replace 3 cells shipped from Germany. That was four months ago.

It's weird to me they would replace individual cells instead of the whole module.

[f1geek]

I'm guessing if 3 bad cells were identified, VW spends less money by replacing three cells instead of the whole pack.

It is interesting that a dealer can replace three cells, suggesting VW has trained at least some technicians how to do this work.

[somethingcool]

I'm guessing if 3 bad cells were identified, VW spends less money by replacing three cells instead of the whole pack.

I wouldn't expect them to replace the whole pack, but pulling a module, dissembling it, swapping 3 cells, and reassembling it at HV tech hourly rates seems way more expensive than just swapping a whole module. Especially since the supplier normally makes the modules for VW (Panasonic or Samsung depending on year), I'm surprised the techs are even trained to do so. I think there are 16 modules in the pack.

[f1geek]

Maybe. It could also be the cells used in the e-Golf are already obsolete and not easy to acquire. I believe VW makes modules and supplier normally only makes cells. There are 27 modules in the pack. Maybe modules, not cells were actually replaced?

[somethingcool]

I believe VW makes modules and supplier normally only makes cells. There are 27 modules in the pack.

According to this: https://www.usitc.gov/publications/332/ ... teries.pdf
Modules are assembled in Hungary, which would be Samsung's plant: https://www.argusmedia.com/en/news/1996 ... tery-plant
Also if you look at a picture of the module labels it's clearly Samsung branded.
I forgot they had different sized modules, you're likely correct about the number but I couldn't find any references.

Maybe modules, not cells were actually replaced?

That was kind of my point from the get go.

[f1geek]

Yes, I missed your comment. Good sleuthing! It does look like Samsung manufactures the modules for VW.

Here is the link for 27 modules (this link says 25 Ah, the capacity of the 24.2 kWh pack, but packaging is identical for 35.8 kWh, 37 Ah cells):

https://pushevs.com/wp-content/uploads/ ... attery.jpg

Based on my calculations here are the module configurations:

10 x 6 cell modules
17 x 12 cell modules

This adds up to a total of 264 cells, which is what the 88s3p VW e-golf pack contains.

[BayAreaeGolf]

Good sleuthing indeed! You were right on the cell modules. The service tech didn't mention cell modules and just said 'cells'. I scanned the parts list and noticed CELL MOD, and there are 2 not 3, unless he meant 3 cells were determined to be bad and they happen to be in the 2 modules replaced.

Here is the full repair parts list:
1 5QE-804-841-AB-NVB HOUSING
1 12E-010-001-B STICKER
1 12E-010-006-Q WARN. SIGN
1 12E-010-006-A WARN. SIGN
1 12E-010-006 WARN. SIGN
1 5QE-915-599-AH CELL MOD.
1 5QE-971-226-M HARNESS
1 1EA-010-505 WARN. SIGN
3 D-004-660-M2 2K GLUE
1 D-181-220-A1 PRIMER
1 5QE-915-599-AK CELL MOD.
3 D- 00950025 APPLICATOR
8 N- 10788401 SCREW
2 N- 10560702 BOLT
2 N- 10785401 SCREW
6 N- 10653103 BOLT
14 5QE-915-359-E BOLT
8 N-107 - 884-01 SCREW
14 N- 91147202 BOLT

I was told by the dealership tech that in total the service cost around $8000 which was covered under warranty.

[shyhchien]

My 2019 EGOLF has same issue. It has been 2 months but it does not fix yet. Deal always told me waiting for the part. It is no schedule to fix.

[BayAreaeGolf]

Check with a lemon law attorney, being 2 months in the shop in one stretch seems like a crazy long time. You may be able to return the car and get a refund.

My 2019 EGOLF has same issue. It has been 2 months but it does not fix yet. Deal always told me waiting for the part. It is no schedule to fix.

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