Internal resistance of a batery

[DaTario]

Hi All,

I would like to know what is the precise meaning of the internal resistance of a DC source of voltage.
Does it have some chemical contribution (as for instance, mean time for the reaction to occur, mean velocity of difusion of charge through the acid solution, or something like this) ?


Thank you.

Sincerely Yours

DaTario

 

[shreason]

I think you're right. And any resistance can be considered as you mentioned. The concentration of charges, the drift (may be the same as diffusion you mentioned, but I think diffusion relates to the gradient of charge density not electric field) velocity of charges, the number of charges one particle keep with.

 

[astrokreng]

Hello DaTario,

The internal resistance of a battery refers to the resistance that exists within the battery itself, as opposed to the external resistance in a circuit. It is a measure of how much the battery's voltage will drop when a current is drawn from it. This internal resistance is due to the materials and design of the battery, and can vary depending on the type and condition of the battery.

The chemical contribution to the internal resistance of a battery is related to the battery's internal chemical reactions. These reactions can create resistance within the battery, as ions and electrons move through the battery's components. The mean time for these reactions to occur and the mean velocity of charge diffusion can also impact the internal resistance of a battery.

Overall, the internal resistance of a battery is an important factor to consider when using it as a power source, as it can affect the battery's performance and lifespan. I hope this helps clarify the concept for you.