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"krj" wrote in message . .. Capt. Neal® wrote: "krj" wrote in message . .. Capt. Neal® wrote: "Meindert Sprang" wrote in message ... "Capt. Neal®" 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 |
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