Weird BMS balance port

ESK8 Electronics
1

Hello, just got back to upgrading my board and got really confused with the BMS, let me explain: I have two 6s batteries connected in series, and I bought a 6s 10A BMS for easier charging (charge only) but after soldering everything and trying to connect the balance cable to the BMS port, I couldn’t get it in there, and then I noticed that it wasn’t the “normal” 6s port, it was smaller.

So my only way of connecting a balance cable to the BMS is connecting the one that came with the BMS, but that one has no connectors on the other side, and I don’t want to start soldering tiny balance cables. What are my options here? should I just get a different BMS with a full-size port? Is there any adaptor from the smaller 6s to the standard one? I took some pictures to make it clearer: 34

34%20(1)

34%20(2)

Hope you can help me Thanks!

2

It’s possible that they use the same pin size and socket, so it might be possible to just switch the white housing and keep the cable.

Try taking a pin out from each and compare. Careful though, it’s live :joy:

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3

Just checked, pin sizes are also smaller, so I can’t swap them out manually

4

That’s a shame. Sounds like a solder job then.

5

Welp. Mabye I’ll just get another BMS with a normal sized port, they’re like 5$. Thanks for trying

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6

The larger one is JST XH and the smaller one is JST PH series

7

Oh, I tried looking up a balance cable with the PH one but couldn’t find anything, any recommendations on where i should look?

8

something like this?

9

Yeah, but with the other side as two 3s balance cables, like this one:

10

oh hmmmmmmm cant say i’ve seen much in that size.

buying another bms might be easier but if you want to make your own adapter, rs-online has all the connecters

https://au.rs-online.com/web/p/pcb-headers/8201431/

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11

Thanks for all the help, I’ll probably get a bms.

Edit: Do you think this bms has the XH port or the PH one? I can’t really tell and its not specified in the specs. https://www.ebay.com/itm/6S-22-2V-Li-ion-18650-Lithium-Battery-BMS-Charger-Protection-Board-with-Balance/202309446114?hash=item2f1a9529e2:g:4iEAAOSwWqNa8~mw

12

the little fin things on the top of the plug look like XH

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