ID.3 and other MEB battery packs in conversions

[Carel Hassink]

Jochen what brand of MEB battery you have??
LG Chem, closed aluminum case,
or
CATL aluminum body black plastic sheet on top.

Carel

[Kutato72]

Fuses. 1206 size SMD fuses in the LG Chem version.

[DermitdemTiger]

I have closed modules from LG.

Kutato, great picture. This helps a lot!
I guess the grey flex cable is from an 8S module and the pink one from a 12S module? So there are 4, respectively 6 fuses somewhere else? Also good to see one of the NTCs. Is the other placed similar, just on top of the cells?

Best regards, Jochen

[Kutato72]

There are also fuses at the other end. He just couldn't fit a single photo.

[Clanarn]

Jochen, what a bummer, sad,
but think you blew the smd resistor in the line of the flex cable, leading to cell 12, disabling it effectively.
100mA is about max what it will take...

Lars, a partner has designed a cell-tab board using oem cell-tab cable, out goes MOLEX with pin-numbering sticker for easy connecting,
check evcreate.nl/shop/

Carel
Perhaps I can help out, quite a few battery modules at hand, or talk to Lars

IMG-20220311-WA0001.jpeg

"The Orion BMS balances at a maximum rate of about 200mA". So the MEB modules can't be used with Orion BMS?

[Carel Hassink]

I was very conservative in my thinking that 100mA would be prudent.

If 750mA (per Kutato72 ) : all Orion users become happy, as it seems,
but we have Lithium Balance/Emus etc, and other commercially available bms brands too

I'm happy to be wrong with my estimate of max mA =100, if that makes us all happy to use commercially available bms's
(way forward, we go test it)

best regards, Carel

[Riwi]

Hi!

I've used e-tron modules,3s4p 240ah, in a couple of builds and those use the same type on flex cable.
The flex cable has a high resistance compared to normal cables which can be a problem for the BMS because of faulty cell voltage readings. I’ve seen this on BMS based on the LTC68XX stack monitor. I ended up modifying all modules and replacing the flex cable with 22 awg cable.

Can Orion compensate for wire resistance?

BR

Rikard

[Ammar]

@Carel, I would like to know the weight of the 6.85kwh 234Ahr LGChem modules, please.

[Carel Hassink]

Ammar, here you go:
size: 59x22.5x11cm
weight: 29.85kg
best Carel

[Ammar]

Thank you, Carel, for the quick response and the detailed info. Much appreciated.

[CupraBorn]

Dear all,
I have registered myself to this forum because of this interesting thread. I'm thinking of building a second life ESS with the 12S VW MEB modules.

1) If it is possible I would like to use the VW original BMS (VW Slave Boards for 4 battery modules). I would like to buy them (evt. new from VW). Does anybody have a idea how they can be addressed and configured (can bus)?
If they are addressed and configured correctly, I have read that the SimpBMS would make an interface from an inverter to the BMS.
Alternatively, I would use any 3rd party BMS. Does anybody have a recommendation for a ESS?

BR,
CupraBorn

[boekel]

Hi CupraBorn,

SimpBMS works with them but not 100% yet, temperatures are not yet shown.

[Carel Hassink]

https://www.oemvwshop.com/0z1915140d-co ... -p2563687/