Battery connection help please

[Panamanian]

Hi there. I'm new here, and this is my first time trying to fix my Ilife V7S pro vacuum cleaner battery.
Original battery is this:

I want to replace the 4 18650 with my INR18650-25R daweikala
I have seen several videos of how to solder, risks of 18650 and other stuff, but after disassembly the pack (4S1P), i found this module, I'm not sure if it's a BMS or just a balancer or just a charger or a mix of everything.
This is the module:

Backside image:

Also it has: V1, V2, V3, V4, P+, P- and B-

I dont see B+
Could you please guide me how to make the connections? I see just one plug to discharge and to charge.

Thanks infinitely

 

[lightfooted]

Looks like a standard 4 pin molex connector. I could be wrong but just from the first pic you have it does look like one.

 

[Panamanian]

Thanks for your answer.
Could you guide me in the connections?

It has: V1, V2, V3, V4, P+, P- and B-
Remember it's a 4S1P

Thanks again.

 

[lightfooted]

I'm sorry, I apparently don't understand what you are attempting to do. I thought you were simply wanting to replace the connector on the end. Or rather, attach a new battery pack to the existing connector. That board does appear to be a management circuit that keeps the cells healthy and safe.

 

[WalkIntoTheLight]

Yeah, why not just connect it the same way the existing battery pack is wired? If you're just replacing the 18650 cells, it should work the same way. Or did you already disconnect everything, and don't know how it was wired?

 

[Lynx_Arc]

I'm guessing B- and V1-4 are the individual batteries with B- the negative terminal and V1 the first battery +, V2 the second V3 the third and V4 the fourth. P+/P- are connectors to the whole series set which is probably the same as connecting across B- and V4.
If you connect across V3 and V4 it should measure the voltage of one battery and V1 and V4 meaures 3 batteries.

 

[DIWdiver]

Are those daweikala cells the 9800 mA cells I'm seeing advertised? If so you may want to read the thread on Asian 18650's, about 20 threads down in this same forum.

 

[Panamanian]

Or did you already disconnect everything, and don't know how it was wired?

Exactly, i disconnected everything and forgot how it was. Where goes everything? :shakehead

 

[Panamanian]

By the way daweikala are 2500 mah high drain