RobbW
Posts: 417
Joined: Mon Jul 08, 2013 1:23 pm
Location: Elgin, IL

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Tue Nov 28, 2017 9:34 am

Hey, kiev! So what's the current status of your battery? Are you still trying to play around with it yourself? Or have you finally taken it in to a dealership to see if you can get a warranty replacement? Unfortunately, I do not have the tools or the time to do all the DIY checking and experimenting that you are detailing in your thread. I'm planning to just take it in to the dealership and hope for a warranty replacement of the whole battery pack.
Clear Skies,
Robb

EV: 2012 Mitsubishi i-MiEV SE, Raspberry Metallic, Premium Package - Purchased 07/11/13
PHEV: 2017 Chrysler Pacifica eHybrid, Bright White, Platinum Package - Purchased 05/01/17

kiev
Posts: 577
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Tue Nov 28, 2017 7:05 pm

i made an appointment to take it in on december 11th, i hope they will do a "cell smoothing function" with the MUT3, but i doubt they will listen to my input and just follow orders from the home office...i expect they will eventually find that there is a bad cell and that the pack will be replaced under warranty.
kiev = kenny's innovative electric vehicle

adam
Posts: 13
Joined: Tue Apr 19, 2016 5:53 pm

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Wed Nov 29, 2017 8:00 pm

Interesting, I also have a i-miev 2012 and I started getting charging issues 4 weeks ago ( at around 40k miles as well )
Charging stopped at 15/16 bars when I noticed the issue.

week 1 full charge (15/16 bars):
Image

week 2, (2/16 bars):
Image

week 3, full charge (12/16 bars):
Image

week 3, (2/16 bars):
Image

week 4, full charge (11/16 bars):
Image

week 4, (2/16 bars):
Image

I went to Mitsubishi dealer 3 weeks ago, several times. They did several test and kept the car for several days. I am still waiting for the final decision to know if they will replace the battery pack or not.

update:

week 5, full charge (10/16 bars):
Image

week 5, (2/16 bars):
Image

At this point, I had roughly 35 km autonomy total, without using AC or heater...

Good news, the battery pack replacement got approved by the team in Japan. 3 days later the new battery pack arrived at the dealer location.
The replacement took 3.5 hours ( all under the guaranty, I had nothing to pay )
Image

New battery, full charge (16/16 bars):
Image

New battery, (2/16 bars):
Image

Old battery Ah:
Image

New battery Ah:
Image

Edit:

The dealer don't know if the new battery pack is brand new or refurbished. He confirmed that the warranty period is not reset though.
Last edited by adam on Mon Dec 11, 2017 12:29 pm, edited 4 times in total.

JoeS
Site Moderator
Posts: 3436
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Wed Nov 29, 2017 9:29 pm

adam, thank you for posting the CaniOn screenshots - isn't it great to see exactly what is happening and that cell #67 is the culprit!. Do let us know what Mitsubishi does for you.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

kiev
Posts: 577
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Wed Nov 29, 2017 9:37 pm

That's what mine looks like also--one cell that is depressed 100 to 200 mV and no way to bring it up with the others.

Seems like we are getting quite a few reports like this. It's probably just a matter of time for everyone's pack to go south like this, which is a real shame since they destroy all the good cells when they replace one.

i have dismantled and repaired several dozen battery packs from lawn mowers, cordless drills, computers, cell phones, portable electronic instruments (Tektronic oscilloscope), basically anything with lithium cells. In every case the pack was locked up and wouldn't charge, but after disassembly the cells were found to work with no problem. The issue was always in the internal BMS board that controlled the pack, and bad solder joints were the biggest culprit.

Surface mount electrical components are an abomination to anything that really needs to work, and those little ceramic capacitors are just a short-circuit waiting to happen.

Wouldn't it be such a shame for perfectly good cells and packs to be trashed just because a cheesy little part on the CMU board was just a piece of crap and the design lacked robustness and a failure mitigation strategy (such as used on Tesla BMB boards).
kiev = kenny's innovative electric vehicle

PV1
Site Moderator
Posts: 2906
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Thu Nov 30, 2017 5:28 am

Seems like a lot of people are having issues all of a sudden. Does anyone know if these are the newer LEV50n cells failing or are they the old cells? I jumped on the forum last night and it made me so nervous I parked the Bolt and started driving the I-MiEV again.

Do I hear independent battery shop :ugeek: ?
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

adam
Posts: 13
Joined: Tue Apr 19, 2016 5:53 pm

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Sat Dec 09, 2017 6:25 am

update:

week 5, full charge (10/16 bars):
Image

week 5, (2/16 bars):
Image

At this point, I had roughly 35 km autonomy total, without using AC or heater...

Good news, the battery pack replacement got approved by the team in Japan. 3 days later the new battery pack arrived at the dealer location.
The replacement took 3.5 hours ( all under the guaranty, I had nothing to pay )
Image

New battery, full charge (16/16 bars):
Image

New battery, (2/16 bars):
Image

Old battery Ah:
Image

New battery Ah:
Image

Edit:

The dealer don't know if the new battery pack is brand new or refurbished. He confirmed that the warranty period is not reset though.
Last edited by adam on Mon Dec 11, 2017 12:29 pm, edited 3 times in total.

JoeS
Site Moderator
Posts: 3436
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Sat Dec 09, 2017 8:51 am

adam, congratulations, and thank you for posting the screenshots.

So, the old battery still had a capacity of 38.4Ah.

Burning question: what is the capacity of the 'new' replacement battery?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

adam
Posts: 13
Joined: Tue Apr 19, 2016 5:53 pm

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Sun Dec 10, 2017 8:36 pm

Thanks JoeS,

I just realized I forgot to post the new AH screenshot. I added it to the previous post, but the new value is 45.4Ah

phb10186
Posts: 290
Joined: Fri May 13, 2016 12:58 am
Location: North London suburbs, UK

Re: Feb 2012 Miev with Pack Trouble at 40k miles

Mon Dec 11, 2017 6:12 am

adam wrote:Thanks JoeS,

I just realized I forgot to post the new AH screenshot. I added it to the previous post, but the new value is 45.4Ah


Thanks for that - useful!
2012 I-MIEV Keiko Silver 16K
2010 Insight ES-T 43K
2001 Accord Type-V (F23 manual)
2009 Hornet CB600F
2008 SH300

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