Internal resistance of a batery

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SUMMARY

The internal resistance of a DC voltage source, such as a battery, is influenced by several factors including charge concentration, drift velocity, and the diffusion of charges through the electrolyte. The discussion highlights that internal resistance can be attributed to both chemical reactions and physical properties of the battery's materials. Understanding these contributions is essential for optimizing battery performance and efficiency.

PREREQUISITES
  • Basic understanding of electrochemistry
  • Familiarity with charge transport mechanisms
  • Knowledge of battery chemistry and materials
  • Concept of diffusion and drift in electrical contexts
NEXT STEPS
  • Research the impact of charge concentration on battery performance
  • Explore the relationship between drift velocity and internal resistance
  • Study the chemical reactions occurring in lead-acid and lithium-ion batteries
  • Learn about methods to measure internal resistance in batteries
USEFUL FOR

Electrochemists, battery engineers, and anyone involved in battery design and optimization will benefit from this discussion.

DaTario
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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
 
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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.
 

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