I’m struggling to add a balance tap to my welded battery pack. I’ve got the black and red wires going to the main outputs of the pack, where the light usually connects, and the blue goes down to the bottom of the pack to what is labled B-
As you can see on the cell checker, it’s not picking up a voltage.
If I proble the red + black and Red + Blue wires, i get voltage readings at the balance connector.
Can anyone see if I’ve done something glaringly wrong? I know my soldering isn’t the best, I was a little shaky doing this yesterday. I wanted to prove it worked then tidy it up.
I can’t see how the PCB traces are… Do you have a voltage measuring device other than the cell checker like a DMM?
Between red and black you should see the whole voltage.
Between black and blue you should see cell number one voltage.
Between blue and red you should see cell number two voltage.
Maybe the PCB protection is the problem. One of red or black going into the balancing connector come from the PCB and not directly from the cell. Connect balancing connector directly to battery and it would work, unless of course if something is wrong with the charge ( the balancing circuit on my 106b is failing.)
The way I had it wired yesterday was to the tabs coming onto the PCB from the cells. The two terminals at the bottom (where the blue wire is) has a B+ and a B- then the tab at the top is labeled BM.
When I wired to this yesterday, it didn’t even fire up the charger to check the cells.
I’m trying to get my hands on another charger to try, as this is new and I have wired the balance plug myself. Too many variables to rule anything out I think.
As it’s connecting to both banks of cells, am I right in thinking it doesn’t matter which way the black and blue wire are, as long as they are on negative terminals.
Get a couple of those lipo alarms with voltage display. Amazing useful things. You can use it to monitor / test 2S to 6S batteries. ( not great with 1S)
Good shout actually. I did think about grabbing a couple when I ordered the rest of my stuff.
I’m leaning towards the charger being duff, as I can read the voltages with my DMM on the balance wire.
Testing each battery gets me 3.48 / 3.48 across bank 1 and 3.49/3.49 across bank 2. Each pair is coming in at 6.95 and 6.96 (this pack needs a charge) The pair voltages can be replicated at the JST-XH connector using the red wire as the common powe
