me68
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 6:25 am

Hello!

Today also a lifting ramp was available to replace the defective cell 23 of my C-Zero.

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The green one ist the replacement cell:

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I have also made some videos. If the videos are ok, i'll upload a small video of this cell replacement, too.


Martin :-)
... en route with a Citroen C-Zero, Bj. 8/2012 (http://www.spritmonitor.de/en/detail/532466.html)
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Phximiev
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 7:30 am

Cool, how long did the whole process taken?

And did the replacement work?
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JoeS
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 8:26 am

Martin, wonderful that your replacement went well, and it looks as though you were in a private environment where you were able to take your time. In addition to the cell, did you replace any other components? Looking forward to your video and the CaniOn readings of your new cell.
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me68
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 8:33 am

Hello!

Batt Status before cell replacement:

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... and after cell replacement:

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Martin :-)
... en route with a Citroen C-Zero, Bj. 8/2012 (http://www.spritmonitor.de/en/detail/532466.html)
... our website: http://www.facebook.com/emobility.at

kiev
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 10:15 am

Was the cell located where you expected it to be in the pack? The diagram from Malm looks like a different placement for cell 23. Does cell #1 start at the bottom (-) or top (+) of the pack?

For some reason i thought the cells were standing upright, but i see that the modules are laid over on their side and the monitoring boards are located between the top of one module and the bottom of the next. So the temperature measurements are getting contributions from both modules.

i would be concerned about the effect of gravity and the weight of the cell roll pulling down against the internal current collectors, which are just crimped to the edges of the cell roll.

CT scan of a cell showing current collectors, etc.
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Last edited by kiev on Mon Aug 31, 2015 7:28 am, edited 2 times in total.
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JoeS
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 11:37 am

me68 wrote:Hello! Batt Status before cell replacement:... and after cell replacement:...Martin :-)
Fantastic and congratulations! :geek: 8-) :D :geek:
You have paved the way for the rest of us. :ugeek:
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

RobertC
Posts: 292
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Location: Winter Garden, FL

Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 1:21 pm

kiev wrote:Was the cell located where you expected it to be in the pack? The diagram from Malm looks like a different placement for cell 23. Does cell #1 start at the bottom (-) or top (+) of the pack?
The cell replaced in Malm's drawing is here:
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Perhaps the front and back groups of LEV50-8's are reversed?
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kiev wrote:For some reason i thought the cells were standing upright, but i see that the modules are laid over on their side and the monitoring boards are located between the top of one module and the bottom of the next.
The battery pack is composed of ten LEV50-8 battery modules with eight 3.7V LEV50 batteries and six temperature sensors each, and two LEV50-4 battery modules with four 3.7V LEV50 batteries and three temperature sensors each, for a total of 88 LEV50 batteries and 66 temperature sensors.
The two LEV50-4 battery modules sit in the battery pack so as to have their battery management circuitry and temperature sensors mounted on top of the batteries, while the ten LEV50-8 battery modules sit in the battery pack so as to have their battery management circuitry and temperature sensors mounted on the side of the batteries.
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RobertC
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Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 1:29 pm

me68 wrote:I have also made some videos. If the videos are ok, i'll upload a small video of this cell replacement, too.
Fantastic pictures Martin! We would love to see the video of your cell replacement.
”Red” - 2018 Red Dual Motor All-Wheel Drive Tesla Model 3 - 11/27/18
“Blue” - 2018 Kinetic Blue Chevy Bolt Premier with QC - 5/13/18
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me68
Posts: 94
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Contact: Website

Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 1:47 pm

Hello!

First charging after the cell replacement:

Youtube Video

Conspicuous: At 94% cell 23 does fall back in cell voltage, even till this point it has the same cell voltage to the other cells. At 97% SoC goes back to 91,5% again. Is the BMS in learning mode now? Any ideas?


Martin
... en route with a Citroen C-Zero, Bj. 8/2012 (http://www.spritmonitor.de/en/detail/532466.html)
... our website: http://www.facebook.com/emobility.at

me68
Posts: 94
Joined: Fri May 24, 2013 5:53 am
Contact: Website

Re: Single LEV50-cell wanted for our Citroen C-Zero

Sat Aug 29, 2015 1:56 pm

Hello!

First trip after cell replacment - round Neusiedlersee:

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20mV diff at the beginning would be put right with the next couples of full charges. Looks ok again to me :-)


Martin
... en route with a Citroen C-Zero, Bj. 8/2012 (http://www.spritmonitor.de/en/detail/532466.html)
... our website: http://www.facebook.com/emobility.at

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