Skrevet av Emne: Enerdel battery fault - repairing...replacing...  (Lest 2023 ganger)

BauDemo

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #45 på: Onsdag 22. Mai 2019, klokken 13:52 »
Could you do me a favor and if you still have the bracket for the 12V battery out if you could take 10 photos of it from all kinds of angles and measure 3 directions, so I can make a 3d model of it?

Thanks in advance!
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pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #46 på: Onsdag 22. Mai 2019, klokken 19:31 »
It is not a favor! you are my best friend BauDemo!  :-*    I'll do that tomorrow.
Also I can ask one of my former work colleague to do that for you but it will last few weeks I think - let me know.

Meanwhile I've compared the advantages/dissadvantages of LTO versus Lifepo4 cells  - that I intend to implement on my Think in the future.
It seems that Lifepo4 is more convenient due the higher energy density and much lower (half) price comparing to LTO.
The only big dissadvantage is : cannot be charged under 0 celsius. (which can be a problem in northen countries but here in the Balcans we only have one month with such low temps due to the global warming)
I think I can fit at least 32Kwh Lifepo4 cells inside but I'll be back with final calculations soon.
Also tomorrow I can start measure the real range of my car and I'll keep you posted.
See you tomorrow!

Regards
Viorel V.

BauDemo

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #47 på: Onsdag 22. Mai 2019, klokken 23:14 »
Thanks!
Made a new thread about this.
Regarding the battery pack - what is the price per kWh for LiFePO?
Why not just get a battery pack from nissan leaf and use all the electronics, contactors, heating management, etc?
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pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #48 på: Torsdag 23. Mai 2019, klokken 14:40 »
What I have found in China with shipping cost and EU import tax included :
105Ah Lifepo4 cell = 65 usd($), so approx 195$/Kwh (175 eur/Kwh).
Shipped by sea (60 days).

FYI: shipped by air (15 days) it will be + 15...20%

pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #49 på: Torsdag 23. Mai 2019, klokken 21:23 »
Hello friends
First test was done today, mostly on highway.
Average speed = 70Km/h.
Max speed 100Km/h
Distance 62,2Km

At the end of test SOC-meter shows 60% battery left.
After key removed -> 1 minute pause -> key=run  - SOC-meter = 34% battery left.
Comtool connected -> 34% SOC
minim V cell = 3,41V , max V cell =3,7V

Something is wrong here ...any ideas ?

In rest - no problem whatsoever, perfect car behaviour - the motor sound was almost identical to subway trains sound.

BauDemo

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #50 på: Fredag 24. Mai 2019, klokken 07:17 »
This is as expected.
The BMS is estimating 3 (or 4) different SOC based on different things. Ah charged/discharged, voltage, ...
If you had the nikometer you would see these SOC... and when one or more of the cells in the pack report lower voltages the SOC values differ drastically.
I am attaching a photo I made on a pack with a big difference in reported voltages.
See the P: 1: and 2:... these are usually very close to each other on a balanced pack.
 
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pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #51 på: Fredag 24. Mai 2019, klokken 07:23 »
Thank you.
So one more thing on to do list:
-Nikometer   :+1:

pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #52 på: Tirsdag 28. Mai 2019, klokken 09:45 »
Hello
The cell balancing is in progress, now the CV delta (diff between the lowest and highest voltage cell) is 0.12V.
The range seems more "normal now".
 [ You are not allowed to view attachments ]

pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #53 på: Fredag 31. Mai 2019, klokken 16:35 »
Hello friends

I was looking for cells balancers and I found a nice one (at first look) :
 [ You are not allowed to view attachments ]
I've contacted the chinese supplier and he sent me this "manual": 
 [ You are not allowed to view attachments ]
The price seems resonable (75 eur without the metal box)
Other advantages:
-Balancing is made non-stop till the cells have same voltage (so better than Top balance, Bottom balance)
-Can be used with almost all type of cell (cell nominal voltage must be in 1...5V range). So can be reused in case of changing the battery cells ;)
-It also has an ios & android app which display all cells voltages and let the user choose some variables (such as the balance current - max 1A for this model)
On short this ballancer moves "energy" from high voltage cells to low voltage cells all the time by charging and discharging one capacitor (or few). This is very good for EV applications since it will give you the maximum range possible (according to your cells).

Overall I think it deserve a chance for testing so I've ordered two (24 cells  = the cells number is one enerdel pack, I intend to use one module for one grey enerdel box).

have fun!
« Siste redigering: Fredag 31. Mai 2019, klokken 16:36 av pexic »

pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #54 på: Lørdag 22. Juni 2019, klokken 17:46 »
Hello

update:  computer cooler added:
 [ You are not allowed to view attachments ]  [ You are not allowed to view attachments ]  [ You are not allowed to view attachments ]

cooler info : 12V / 150mA - connected to +12V power bar of one RLEC.
Air filter added in the car compartment (under the floor, behind the seats)

scope :
-ventilate the air inside the battery for better cooling of RLEC modules
-ventilate the air inside the battery for eliminating the water accumulation during condensation.
-create air pressure inside the battery so moisture will not enter even if there are small air gaps around the battery case.
-heating the battery during winter (webasto unit will be mounted in the same empty box as the battery air filter :
 [ You are not allowed to view attachments ]

have fun!

BauDemo

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #55 på: ſøndag 23. Juni 2019, klokken 11:44 »
Great work! I have been thinking of adding a fan too, but on the wall that would match the opening in the car chassis that is behind the passenger door. I think this opening is in light beige color in the last photo you uploaded.
Have you cut a hole in the chassis? Or maybe there is already opening there that I have missed?
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pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #56 på: ſøndag 23. Juni 2019, klokken 16:56 »
The opening in the chasis  is already there, in fact there are two openings the one used by me (in the middle) and a larger one in the right. Beside that in the front right passager side.
The two back openings are vertical and if you install the cooler like I did you don't neet to cut the chasis.
I"ll upload a picture soon.

have fun.
« Siste redigering: Tirsdag 25. Juni 2019, klokken 09:45 av pexic »

pexic

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #57 på: Tirsdag 25. Juni 2019, klokken 09:47 »
Here is the chasis hole used by me for ventilation , view from under the car (battery was removed) :
 [ You are not allowed to view attachments ]

BauDemo

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #58 på: Tirsdag 25. Juni 2019, klokken 12:07 »
Thank you for the photo.
I adjusted it a bit to make the opening more visible.
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jur

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Sv: Enerdel battery fault - repairing...replacing...
« Svar #59 på: Lørdag 10. August 2019, klokken 18:16 »
Hi all,

 the information shared here about troubleshooting Enerdel batteries is really instructive. So maybe one of the Enerdel specialists here is able to enlighten me:
I've been asked to help with the diagnosis of battery issues on a small fleet of lithium-equipped Th!nks. So I installed Commtool (v3.08) on my diagnosis gear and tried it on 2 cars on the vehicle CAN bus, but could only receive raw data. I tried a few of the provided .MSF files, but got only "no data received" messages. As far as CAN messages sent only on the internal bus are concerned, this is as expected, but I wonder if Commtool is any good at all on the vehicle CAN bus. Or do I miss something?
Unfortunately, the documentation from Enerdel I could retrieve, is rather vague in this respect.
For example I could not find a list of CAN messages sent by the MLEC on the external bus yet. 

Thanks in advance and best regards,
Jens