Not Balancing Three 12v Right
This post is just for info in case anybody else has a similar situation I have learned the truth about wiring up three 12s as though they were two 12s. With the load and charging pos and negs o...
Forum Discussion
MEXICOWANDERER wrote:
What are you going to see.
I no longer have my text books on the laws of electricity and have no extra time to re-study electricity right now.
Let me hazard a guestimate answer:
Given that one has a voltmeter with enough resolution, I bet you'll see 12 different votages ... depending upon the particular at-rest electro-chemistry of each individual battery.
However, with batteries in parallel trying to either dynamically deliver current to a load or dynamically accept current from an outside charging source .... you better have exactly DC resistance matched cabling between each battery and the load or between each battery and the charger (called paralleled battery "balancing") ... or else some batteries will be contributing or accepting more or less current than it's neighbor. Hence, when the current flow stops, each battery's state-of-charge will be slightly different than that of it's neighbor.
You gotta love that pesky little cable resistance times current flow versus voltage drop relationship. Even I Remember That. :(
