ANT BMS help

57thusername

1 µW
Joined
Feb 8, 2021
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2
I bought a supposidly new 7-16S 80a ANT BMS from ebay, turned out it was most definatly used, and i think is missing a few cables, like the on off switch or power, it looks similar to the one found in this video, where he says there are two wires, a red and a black, which need to go on to a battery of 2-6v to turn the unit on. (Timestamp ~7:25)
https://youtu.be/im4ggvoni5M?t=438
so question is is there are 4 pins so any idea which two pins the + and - wires go onto?
Is there any way to determine things like this using a multimeteror anything?
ant bms translated.jpg
powerplug antbms.jpg
 
Hi mate, I found this product page on the chinese version of alibaba, there are pictures that should help you determine all the wiring :

https://item.taobao.com/item.htm?spm=a230r.1.14.1.79531b15lWqOxV&id=666636865981&ns=1&abbucket=1#detail

Let me know if you can't access the link from wherever you live, in which case I'll take a screenshot

Edit: Turns out the link doesnt' show up on the forum, for some reason. So I made you an image out of the most important parts of the product page, here you go:
sdg.png
 
you can find all you need to know here: https://www.aliexpress.com/item/1005003250576399.html
 
Thanks so much, 4v across those two wires turned it on, (not off though)
A few notes for anyone running into issues with this.
1 - there's an updated app, without which no settings can be applied
2 - Both of the red balance leads are connected to the positive end of the pack
3 - if not using all the balance leads, the leads in the middle are the ones unused (generally equal numbers per plug, you'll know if you get it wrong for your particular config, because some cell voltages will read much too high.
4 - if one of the voltages appears to be fluctuating a lot it's almost certainly the one at the end of one of the plugs, and means it's only got a wire from one of the plugs going to it(see diagram below)
antbms.PNG
note how both plugs are attached to the middle cell

Attached is also the app which works with the 2021 version, i can't currently find the website that i found it on, but it was quite tricky to find.
 

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  • Ant_BMS_2021.zip
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