24 modules x 4s = 96!

 

thank you for doing that calculation for me. Very kind

that’s not really my question. It’s more about the physical connection on the modules. I have not seen any close up photos or heard of anyone using them. I want to know of any gotchas or detail on how to connect the wiring. Are there screw terminals? Do I need to modify them somehow?

 

I would assume this is pretty Plug and Play. Should definitely ask the seller on what is the installation manual, they should be able to provide that prior to buying. In the manual things like wiring and power terminals are going to be mentioned.

 

I agree they should be able to provide it! But so far has been quite hard. The trouble is you deal with people who don’t really understand batteries but can tell you how much it costs. So even slightly technical questions cause problems.

im pretty sure the modules will work, and will have BMS connections under the lid, but I am just not happy to spend any money before gaining confidence - either from the suppliers, or from others on forums like this one who know more about it.

 

I agree they should be able to provide it! But so far has been quite hard. The trouble is you deal with people who don’t really understand batteries but can tell you how much it costs. So even slightly technical questions cause problems.

im pretty sure the modules will work, and will have BMS connections under the lid, but I am just not happy to spend any money before gaining confidence - either from the suppliers, or from others on forums like this one who know more about it.

24 modules x 4s = 96!

Would then be questioning on what wiring bus is the temperature sensors?

I agree they should be able to provide it! But so far has been quite hard. The trouble is you deal with people who don’t really understand batteries but can tell you how much it costs. So even slightly technical questions cause problems.

im pretty sure the modules will work, and will have BMS connections under the lid, but I am just not happy to spend any money before gaining confidence - either from the suppliers, or from others on forums like this one who know more about it.

In this they replace the whole coms
and also busbars, clips, etc.

I would definitely find a supplier that offers a full assembly kit.
Maybe your supplier for cheaper price only sends modules and then when u get only modules, upsels the whole assembly kit at 1k or something.

The CATL modules have flexible ribbon cables on top of cell connections and usually are hard to modify.

 

Would then be questioning on what wiring bus is the temperature sensors?




In this they replace the whole coms
and also busbars, clips, etc.

I would definitely find a supplier that offers a full assembly kit.
Maybe your supplier for cheaper price only sends modules and then when u get only modules, upsels the whole assembly kit at 1k or something.

The CATL modules have flexible ribbon cables on top of cell connections and usually are hard to modify.

Good call on alternative suppliers. It’s hard to grapple with who is offering exactly what but I’m getting a bit of a feel for it now. I guess its too be expected that some suppliers have a better handle on the market they are trying to supply, so include the Leaf specifics, but then you also get less capable suppliers who jump in when they see the chance to make a sale. But actually it’s the ancillary bits that make the difference for a working end system.

I dropped them an email and have asked to see their documentation and video they refer to. The outfit I started with above eventually sent me a YouTube video, but it was in Russian! And I really don’t think they know what a BMS Is!

 

It might be possible to negotiate with them to send one unit for inspection with the understanding of an order for an additional 23 units upon approval?

It looks like the cell voltage monitoring is taken off of a spot welded tab along the centerline of the modules, and there appears to be a black header connection of the end of the module. Of course the header pinout is not shown, but it should be easy to ring it out, and make a custom wiring harness to interface with the LBC.

If you can get these to fit and work out the wiring and connection details, then you could be the leader in buying and re-selling these modules to a whole fleet of laef owners with weak and worn out packs.

i think there are only 4 temperature sensors in a laef pack so you could easily customize the location of some glue-on RTDs.

 

Oh is this the YouTube video that has been going around?

I mostly was wondering the cooling requirements since the Leaf OEM battery isn't cooled.

Just checked the photos and it looks a little different hmm..

 

Since the battery is cycled at 1c max or something, cooling requirements are not super high, imho

 

In the video, BMS wiring is already connected, but better to check if no tricks there.

 

If anyone in the US has purchased modules/battery kits/battery packs from China, could they share the parts list and parts cost, shipping cost, and tariff/import duty cost?

 

How we buy and how they ship probably matters. I bought 40kwh Leaf modules via Aliexpress in the past and they shipped two modules per box via FedEx. So a total of 12 packages. Shipping was like 500 but there was no import costs I was aware of. But they might have been working around and also this was a few years ago before the trade restrictions came into play.