kiev
Posts: 1421
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 7:50 am

Sounds like you have damage on both the AC input side and the DC output section, that's somewhat of a puzzle as it's usually one side or the other, not so much both.
kiev = kenny's innovative electric vehicle

Lic
Posts: 82
Joined: Mon Dec 28, 2015 2:11 pm
Location: Canada

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 11:38 am

I don't see 9,6Om resistance between points N00 and waffle board N contact, so one or both 4.7Om resistors are dead.
Image

kiev
Posts: 1421
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 12:36 pm

WOW! Never seen so much smoke damage before, that thing really exploded.

There is discoloration on one of the white ceramic resistors--that one may be cracked.
kiev = kenny's innovative electric vehicle

coulomb
Posts: 267
Joined: Sun Jun 10, 2018 8:32 pm
Location: Brisbane, Australia

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 3:08 pm

kiev wrote:WOW! Never seen so much smoke damage before, that thing really exploded.

It looks to me more like an arc flash than a component burning. The fibreglass of the printed circuit board will have been damaged by carbonization, which is bad news as it is conductive. It will be difficult to clean all the blackened material so that it is safe for high voltage DC operation again. Every last spec has to be removed, and a good conformal coating applied. It may not be practical to repair that board, depending on the damage.
Last edited by coulomb on Mon Feb 22, 2021 3:10 pm, edited 1 time in total.

Lic
Posts: 82
Joined: Mon Dec 28, 2015 2:11 pm
Location: Canada

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 3:10 pm

I was able to reach resistors contacts, so resistor with discoloration is fine, other one (P10K fuse) is dead. I don't want to remove waffle board (but I can - it just takes time), so I will try to reach resistor contacts by soldering iron or may be I will try to cut bad resistor to reach his legs. Also I checked diode voltage drop and it looks fine.

kiev
Posts: 1421
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Troubleshooting and repair for On-board Charger (OBC)

Mon Feb 22, 2021 7:13 pm

oh yes i agree arc flash is more accurate description.

You probably should check or replace the AC relay since the ceramic resistor fused. i'm guessing maybe for some reason that relay opened while charging--that might explain the damages.
kiev = kenny's innovative electric vehicle

Lic
Posts: 82
Joined: Mon Dec 28, 2015 2:11 pm
Location: Canada

Re: Troubleshooting and repair for On-board Charger (OBC)

Tue Feb 23, 2021 11:42 am

AC relay is working fine. I checked several times.

shamie
Posts: 3
Joined: Tue Jan 12, 2021 2:53 pm

Re: Troubleshooting and repair for On-board Charger (OBC)

Thu Mar 04, 2021 3:13 pm

Hey brains trust,
In theory would I be able to change the OBC charger in my Mitsubisihi Minicab MiEV for one from an iMiEV?

coulomb
Posts: 267
Joined: Sun Jun 10, 2018 8:32 pm
Location: Brisbane, Australia

Re: Troubleshooting and repair for On-board Charger (OBC)

Thu Mar 04, 2021 3:53 pm

shamie wrote: would I be able to change the OBC charger in my Mitsubisihi Minicab MiEV for one from an iMiEV?

Yes, I believe that you can.

pierluc248
Posts: 1
Joined: Sat Mar 06, 2021 5:25 pm
Location: Quebec, Canada

Re: Troubleshooting and repair for On-board Charger (OBC)

Sat Mar 06, 2021 5:34 pm

I have a problem similar to ChristopheFR earlier in the thread, but did not open anything yet as i don't know if my car still has a warranty on it, as i'm in canada. My car is a 2012 with chademo. It still charges on 110v and chademo, but on 220v it charges for a few seconds, than a yellow light starts flashing in the dash, and the charge then stops. The 12v battery still seems to be charging. Does anyone know if the warranty extention in the us still applies to canadian cars?

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