Battery Current Flow

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Model T Ford Forum: Forum 2017: Battery Current Flow
Top of pagePrevious messageNext messageBottom of page Link to this message  By James A. Golden on Sunday, April 16, 2017 - 09:22 am:

A complete circuit is required from the battery through the starter and back to the battery for a good starting Model T.

The battery negative post is always smaller.

Is this because less current comes back than is sent out to the starter and a smaller wire from the negative post to ground should work fine?

If that current is coming back to the battery, on the negative terminal, how come the battery gets low so quick, while cranking the starter?

Where is that positive terminal current really going?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Sims--Reed City,Mich. on Sunday, April 16, 2017 - 09:49 am:

Just my un educated theory. The electrical energy is changed to mechanical energy or heat and neither can be stored back in the battery so is lost.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ted Dumas on Sunday, April 16, 2017 - 09:52 am:

The positive post is larger and the negative smaller so you can tell them apart.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Sunday, April 16, 2017 - 10:13 am:

James
Thank you for the smile!!!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Sunday, April 16, 2017 - 11:31 am:

Don't forget Ford used positive ground from the Model A's up to the introduction of 12V's in the 50's.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Walker UK on Sunday, April 16, 2017 - 01:33 pm:

The current that returns has exactly the same value as the current that goes out, because it is the same current.
Ted is correct, the terminal posts are different so you can't put the wire clamps on the wrong ones.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Phillip Maurici on Sunday, April 16, 2017 - 06:42 pm:

Remember current flows from Neg- to Pos+ in Direct Current.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Layden Butler on Sunday, April 16, 2017 - 07:01 pm:

"current flows from Neg- to Pos+" in the load and from + to - in the source (battery in this case is the source). That completes the circuit making the current flow in a loop.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Rod Barrett - Anderson, IN on Sunday, April 16, 2017 - 09:04 pm:

Not to pick nits, but current does not flow through a battery or capacitor. The current only appears to flow as the electrons are depleted from the negative side of the battery. Think of a battery as a glass of water. You pour the water or electrons out but they never pass through the bottom of the glass.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Sunday, April 16, 2017 - 09:22 pm:

and recharging move them back?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Rod Barrett - Anderson, IN on Sunday, April 16, 2017 - 09:39 pm:

Yes. Recharging fills the battery with electrons, just like filling a glass. Once the battery is full, current flow stops.


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