Farah T M.Noori
Thank you for your question regarding comparing the behavior of batteries and solar cells during discharge/withdrawal. As an experienced researcher in photovoltaics and energy storage, I am happy to provide some perspective.
The key difference between batteries and solar cells is that batteries behave as voltage sources while solar cells act as current sources. Batteries have fairly steady discharging voltage but decreasing current as they deplete. In contrast, solar cells provide constant current across varying load voltages.
These distinct I-V curves stem from their operating principles. Batteries have fixed chemistry driving cell potential. Solar cells generate current proportional to illumination, with output voltage changing based on load resistance that builds up Fermi level splitting.
So in summary, battery discharge shows a falling current but steady voltage, while solar cell I-V curves have a constant current with descending voltage at higher loads. Proper system design requires matching the source behavior to the load needs.
I hope this high-level comparison is useful. Please let me know if you would like a more detailed discussion on simulating and characterizing battery and PV source dynamics. I would be delighted to continue this conversation.
Wishing you all the best,
#SolarCells #Batteries #EnergyEngineering
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