Does peltier effect account for lose of voltage of the cell?

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    Cell Peltier Voltage
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Discussion Overview

The discussion revolves around the Peltier effect and its potential contribution to the loss of voltage in a battery cell. Participants explore the relationship between the Peltier and Seebeck effects, particularly in the context of how heat generation and voltage interact when a battery is connected.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that the Peltier effect, being the reverse of the Seebeck effect, could contribute to the loss of voltage in a battery due to the heat difference created from electric voltage.
  • Others argue that once a battery is connected, the Peltier effect is established, and adding heat would not change the situation, suggesting that the reasoning about voltage loss may be overthought.
  • A participant explains that the battery discharges based on the resistance at the junction and current flow, indicating that the Seebeck effect does not occur until the battery voltage drops below the output voltage of the heated junction.
  • It is noted that the Seebeck voltage cannot contribute to the loss of battery voltage while the battery is connected and charged.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between the Peltier and Seebeck effects and their implications for battery voltage loss. There is no consensus on whether the Peltier effect contributes to voltage loss, and the discussion remains unresolved.

Contextual Notes

Participants highlight the complexity of the interactions between heat generation, voltage, and the conditions under which the Seebeck effect becomes relevant. Assumptions about the behavior of the system under different conditions are not fully explored.

Ahmed Abdullah
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The Peltier effect is the reverse of the Seebeck effect; a creation of a heat difference (between two joint) from an electric voltage.

This temperature difference gives rise to a seebeck voltage which is opposite to the voltage of the cell. So we can resonably conclude that it can contribute to the loss of voltage of the battery, can't we?

I understand seebeck effect but not peltier ... I don't understand why heat energy should be released when electron flow from a higher density to lower density site when it is propelled by an energy source (battery).
 
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Well yea...but...

Ahmed Abdullah said:
The Peltier effect is the reverse of the Seebeck effect; a creation of a heat difference (between two joint) from an electric voltage.

This temperature difference gives rise to a seebeck voltage which is opposite to the voltage of the cell. So we can resonably conclude that it can contribute to the loss of voltage of the battery, can't we?

I understand seebeck effect but not peltier ... I don't understand why heat energy should be released when electron flow from a higher density to lower density site when it is propelled by an energy source (battery).


Why would that ever happen in real life? Once you connect a battery, you get the peltier effect. Adding heat at this point won't change anything. You are trying to out think the process and you really shouldn't.
 
Video Eddie said:
Why would that ever happen in real life? Once you connect a battery, you get the peltier effect. Adding heat at this point won't change anything. You are trying to out think the process and you really shouldn't.

Would you explain things, a bit?
 
Ahmed Abdullah said:
Would you explain things, a bit?

When you apply a voltage, you have the peltier effect. The battery discharges at a rate dependent upon the resistance if the junction times the current flow. While the current flow does carry heat to one side of the junction. There is no Seebeck effect until the battery voltage drops below what the heated junction produces. After the heated junction output voltage is greater than the battery voltage, the Seebeck effect could recharge the battery to the point where the battery voltage equaled heated junction output voltage, but really the voltage would be very small by then.

The Seebeck voltage really can't contribute to the loss of battery voltage since it does not occur when the battery is connected and charged.
 

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