How to connect BMS JBD 20S on 8s battery?

[Paolo965]

Good evening,
I bought a BMS Jiabaida SP22S001 20S 250A
with these connectors you can see in the picture.

My aim is to make a 24V liFePo4 battery,
but the wiring diagram is nowhere to be found.

My only support relies on an image found in this forum, which would be great for me but,
as you can see in the secondo photo, in my connectors there aren't cables number 19 and 20.
I wrote directly to Jiabaida and got no response.

If I refer to the image with the wiring diagram for 8 cells,
the cables from number 7 to numer 19 are all connected to cell number 6,
while cable number 20 goes to cell 7
and cables 21 and 22 are attached to cell number 8.
In my plug, cables number 19 and 20 are missing as i pointed out before.

According to logical reasoning,
I would think that in cell 8, I connect the numbers 21 and 22
and in cell 7 (not having cables 20 and 19), I put the number 18. Am I wrong?

Please, can you help me?

 

[42OhmsPA]

Check section 7.2 of this manual

https://lifepo4.com.au/shop/lifepo4-bms/jbd/24v-8s/jbd-6s-22s-smart-bms-250a-with-heating-bluetooth-balance/?attachment_id=2617&download_file=jjmzzc9hzm0c7

 

[mitchdog]

Here is a picture of the wiring.

 

[Paolo965]

Here is a picture of the wiring.

Thanks for your answer.
Did I get it right?

 

[mitchdog]

Basically you are right. So it is ground then first postive than second postive and so on. the whole group of wires attach to the 6th postive
Here is a picture of it hooked up to my testing battery

 

[Paolo965]

Basically you are right. So it is ground then first postive than second postive and so on. the whole group of wires attach to the 6th postive
Here is a picture of it hooked up to my testing battery

Thank you very much, it helped me a lot

 

[mitchdog]

My pleasure. Good luck.

 

[AndyReact]

Hi, did you get this working? I'm having trouble with this BMS and a 16S lifepo4 battery...

 

[harvski]

I recently set up a Jiabaida SP22S001 20S 250A and found the official diagrams. Maybe they published them since this thread was written...

I got myself very confused setting up the BMS with 8S lifepo4 becaus cell one voltage was reading low (2.68v) but when I tested the BC1 connector it had the correct value (3.5v). I hadn't connected B- at that point and that was the problem

Here's the links and a couple for PDFs from the archive to guide you incase these disappear again
https://jiabaidabms.com/pages/download-files

The RAR archive for all S configurations (attached)
https://cdn.shopify.com/s/files/1/0606/5199/5298/files/AP21S001_Wiring_Diagram.rar?v=1679604012