"krj" wrote in message . ..
Capt. NealŪ wrote:
"krj" wrote in message . ..
Capt. NealŪ wrote:
"Meindert Sprang" wrote in message ...
"Capt. NealŪ" wrote in message
...
I'm talking about two 12v batteries in a series circuit meaning one
positive pole connected
to the negative pole of the other battery. The left over positive and
negative poles must be
connected to some sort of circuit and load such as a light bulb or
electronic gadget that will
cause current to flow through the entire circuit.
In such a circuit, neither battery will charge the other, they will only be
discharged together through the load.
The same current will flow through both batteries, and in both batteries you
can regard the current as "flowing out" of the positive pole.
To charge a battery, current must be flowing "into" the positive pole, which
can only happen if you connect two batteries in parallel, where one is more
discharged than the other.
Meindert
You are wrong. You cannot run current though a battery backwards. You charge with a charging
source that has higher voltage than the battery and by wiring it so there exists a complete
circuit.
When I connect my photovoltaic to my 12v battery the battery takes a charge because the
photovoltaics operate at 16v at ten amps current. The 16v, being higher than the 12v in the
batteries causes a chemical reaction to occur between the sponge lead and the solid lead
and the acid electrolyte and electrons are stored The chemical reaction reverses when the
photovoltaics are removed and a load placed upon the batteries and electrons are released.
Current never goes backwards in the battery.
This is a common misconception and I'm very surprised so-called engineers fall prey to it.
CN
Let's see, +16v from the solar panel to the +12.7v on the battery. - from the solar panel connected to - on the battery. 10
amps or current is flowing. Which way through the battery is the current? If the current is not flowing through the battery,
where is it going?
krj
Duh, Current NEVER flows through the battery. A battery stores and releases electricity
chemically. There is no circuit passing through the battery. The only circuit that exists is
external to the battery. View a battery as a gasoline tank gas (electrons) can be added
to the tank or removed from the tank. It's a storage device and not a pipe of some sort
that has flow one way or the other inside it.
http://hyperphysics.phy-astr.gsu.edu.../leadacid.html
Note how current flow is only shown to be reversed in the circuit outside the
battery when charged. Never, at any time is there any such corresponding flow
or circuitry inside the battery. There is but a series of plates and an electrolyte
that stores or releases electrons. A battery is a tank and only a tank. It is not
a circuit.
CN
OK, what do you call this "release of electrons"? Conventional current flow is usually referred to as "current flowing from + to -
in a circuit. In reality is the movement of electrons from the - pole to the + pole. If electrons move within the battery, there
is by definition, current flow.
There is only current flow in a circuit. Where you test for flow at
the battery terminal is definitely outside the battery and part
of a circuit. A battery is a dead-end storage device that is connected
to a circuit externally to power it.
Electrons don't move within the battery in a circuit. They power chemical
reactions that store or release electrons. Hence the term, storage battery.
They go in, they go out, they don't go through.
Going back to your previous postulation (to assume the truth or reality something with no proof, especially as a basis of
argument), how does a battery with higher EMF in series with a battery of a lower EMF charge the battery with the lower EMF when a
light bulb is connected if there is no current (or electron) flow?
krj
Because there is a circuit between the two batteries which circuit provides
higher voltage at the poles of the battery with lower voltage so electrons
can flow IN to drive chemical reactions which store said electrons and
increase the overall state of charge of the battery. Never do electrons
flow through the battery - only in and out.
Picture lead/acid batteries as a tank, not a circuit, and you'll begin to
understand. They are used to power circuits but they, in themselves, are
not a circuit.
CN