Want to understand current between batteries in battery bank

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  • aerodyn
    replied
    Originally posted by inetdog
    You will find the answer to that all in the reference linked by Mike90250 in the second message at this post: http://www.solarpaneltalk.com/showth...p-Why-Tutorial
    Inetdog, thanks much, that article is exactly what I needed to know.

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  • russ
    replied
    Another resource http://batteryuniversity.com/

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  • Sunking
    replied
    When batteries are in parallel there is no way to calculate how much current is flowing in any one string which is why you should not connect batteries in parallel. The current depends completely on internal battery resistance and connection/cable resistances all of which are dynamic and constantly changing.

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  • inetdog
    replied
    Originally posted by aerodyn
    Just as a matter of learning more about how batteries and charging works, I am curious about the current which flows between the batteries while they are being charged. I have 5 12V batteries connected in parallel. Let's say they are numbered 1,2,3,4,5 and the positive from the charger is connected to battery 1, the negative from the solar panels is connected to battery 5. A typical observation that I have made is this: the charger at the time is delivering 8 amps, on the positive side the amperage between 1 and 2 is 5.9, between 2 and 3 is 4.1, between 3 and 4 is 3.0, between 4 and 5 is 1.6. On the negative side, between 5 and 4 is -8, between 4 and 3 is -5, between 3 and 2 is -3.6, between 2 and 1 is -1.9.
    So, given that the amperage between the batteries during charging reduces as the battery gets farther away from the source, are all the batteries actually receiving the same amount of charge? What is actually going on?
    You will find the answer to that all in the reference linked by Mike90250 in the second message at this post: http://www.solarpaneltalk.com/showth...p-Why-Tutorial

    Leave a comment:


  • Want to understand current between batteries in battery bank

    Just as a matter of learning more about how batteries and charging works, I am curious about the current which flows between the batteries while they are being charged. I have 5 12V batteries connected in parallel. Let's say they are numbered 1,2,3,4,5 and the positive from the charger is connected to battery 1, the negative from the solar panels is connected to battery 5. A typical observation that I have made is this: the charger at the time is delivering 8 amps, on the positive side the amperage between 1 and 2 is 5.9, between 2 and 3 is 4.1, between 3 and 4 is 3.0, between 4 and 5 is 1.6. On the negative side, between 5 and 4 is -8, between 4 and 3 is -5, between 3 and 2 is -3.6, between 2 and 1 is -1.9.
    So, given that the amperage between the batteries during charging reduces as the battery gets farther away from the source, are all the batteries actually receiving the same amount of charge? What is actually going on?
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