RCU Forums - View Single Post - Adding A Balancing Plug To A 3 Cell Lipo
Old 04-12-2006 | 07:55 PM
  #3  
critterhunter's Avatar
critterhunter
Senior Member
 
Joined: Sep 2004
Posts: 2,800
Likes: 0
Received 0 Likes on 0 Posts
From: Out There, PA
Default RE: Adding A Balancing Plug To A 3 Cell Lipo

Took the wrap off one of the Dymonds to take a look. The way I understand it the tabs on lipos are aluminum and thus hard to solder to, not to mention the increased risk of heat doing damage to the cell. Anyway, what I found was that all three cells were soldered to a circuit board that covers on end of the pack. In other words, the three cells are soldered to the underside of a small circuit board that completely covers the end of the pack. On top of this board are traces with solder that "wire" (no wire on the board...just solder and traces) all three cells in series. Easy enough so far and looks like I won't have to deal with the aluminum solder tabs on the lipos. I'll just solder the necessary four wires to the solder and/or traces on top of this board to wire a balancing plug to them. Or, at least...I would guess these traces and/or solder on top of this board aren't aluminum as well? Anyway, my main sticking point at this time is figuring out what the four wires will go to. The pin outlet on the Blinky balancer aren't all that clear, using words like "from negative to most positive wires". What I need to know is where the four wires need soldered to a 3 cell series pack and why. From there I can figure out what pins on Blinky these wires should be going to. I would have assumed that a 3 cell pack would have 6 wires on it's balancing plug (one negative and positive from each cell) in order to see each cell in parallel for balancing. That one has me scratching my head.