Quote:
Originally Posted by lincpimp
I am still not sure how the balancer reads the individual cells voltage in order to match them. I am sure that is is a simple circuit, but having trouble visualizing it..
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Most balancers I've seen aren't using isolated inputs for each cell, so I imagine they simply measure each wire referenced to ground. For example, to get cell 3 on a 4s pack, it probably subtracts the voltage on cells 1 and 2 from the voltage on cell 3 to ground. There really isn't much to a balancer. Most of the resistors on it are used to apply a load to any high cells. All of the measurement and logic must be done via a PIC or something.
Quote:
Originally Posted by lincpimp
Not sure how to explain this but how does the balancer know the voltage of the 3rd cell(1st one in the 2nd pack) as it appears that not using the red wire on the 2nd pack would eliminate the ability to measure across the pos and neg of that cell, the purple circle in the attached pic.
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I know exactly what you mean, but let's see if I can explain it.
A pack's
main black wire is electrically the same point as the most negative balancer wire.
A pack's
main red wire is electrically the same point as the red balancer wire.
I think we can both agree on those two points, right?
When you use a Y cable jumper on the main power leads, you are effectively tying the most negative cell on pack1 to the most positive cell on pack2.