Hi there you guys,
just let me drop some thoughts out of a somehow electrical educated mind:
To get current flow, we need a circuit, including at least a source and a "user" of any kind.
Thats an easy case to measure, calculate and getting thoughts on, because there are easy rules for that.
If u have branched circuits, things are starting to get more difficult. its not any more that easy to tell how much voltage is on where and what current flows in what branch. But with some excercise, man would make it.
Really difficult is, when in a circuit (or even an branched circuit) there are 2 or more sources in use.
Ohh....its very easy when all of them are in a line......then we have just an addition of voltages and a factor of flow. Thats how battery use works.
But having sources parallel, it will get really wild.
U get undefineable flows of all directions (surely.....theoretical neutral wires will hold flows with every tolerance u have in your circuit). That can damage electronical parts.
For using or loading accus, its completely wrong. The accus will never reach a 100% load. Maybe, as long as u use good ones, it may work for some loads....to get...say 95%.
Later, when used and loaded for some times, the inner resistance (that is EVER dynamical, not static and NOT to be measured with a multimeter) will change and get different. It will tell what current flows, because the voltage is fixed. So the older the accus get, the more they will be charged differently.
U will have to use a balanced source, because when good accus get to be fully loaded, the current in the circuit goes down while voltage goes up and bad accus will be loaded with too much current, what will make them hot and probably damage them.
In use, paralleled accus or batterys wont give the performance they could. Getting them on duty will lead to different inner resistances what will cause a voltage drop. Bad accus will take current, while the good ones have to do the work AND give current to the bad ones.
Batterys are not for to be recharged, so that may be dangerous.
Paralleld accus in use will get empty just by letting them together. It leads to permanent charge/dischargements amongst the cells, every flow with resistance and loss: What shall it be good for?
To have accus in a way to work, us them in a line (as it normally is).
They will be floated with just ONE current, that is a summary of all resitances of the cells. Different resistances lead to different voltages over different cells. That gives optimal charge to each cell. Damaged cells are "shut downs", what makes this case more safe: the complete voltage will NEVER be on a damaged cell, others can hold down the "short circuit" just by beeing a bit "overduty", while, in the other case of a breakdown, the whole circuit is broken and all cells are safe from beeing damaged.
Summary:
Parallel loading/operation only works while all cells are fit and nearly on the same techincal data. They will get empty while letting them together. Its a bit dangerous when a cell is damaged.
Noone will use it. When u need to have a bigger capacity, use cells with bigger capacity OR use a switch to use smaller cells one after the other (btw: THAT way u can charge them: with a mutliswitch, one after the other)
but NEVER use or charge accus or cells parallel.
There are chargers that SEEM to load the cells parallel, but they have electronical leveling on each charging-place so every cell is charged seperately. Dont get this mixed up.
Greetings
Frank
