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:  Click to see

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 Click to see

Backside image: Click to see

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

Edited February 16, 20205 yr by Panamanian
Error in images

Forget about the PCB.

Simply cut the original battery case, remove the batteries and replace with new ones.

Then tape the battery pack up again.

V4+

<cell>

V3+

<cell>

V2+

<cell>

V1+

<cell>

B-