- #1
radaballer
- 86
- 0
In a discharging battery, do current and voltage decrease over time? if so how does the battery accomplish the same amount of work over the course of its discharge with a lesser voltage or current?
Voltage stays more or less the same until the point where the battery is no longer able to supply the current required by the load, at which time the voltage starts to decrease.radaballer said:In a discharging battery, do current and voltage decrease over time? if so how does the battery accomplish the same amount of work over the course of its discharge with a lesser voltage or current?
radaballer said:In a discharging battery, do current and voltage decrease over time? if so how does the battery accomplish the same amount of work over the course of its discharge with a lesser voltage or current?
radaballer said:In a discharging battery, do current and voltage decrease over time? if so how does the battery accomplish the same amount of work over the course of its discharge with a lesser voltage or current?
It helps to get things the right way round in this sort of problem. Assuming the load is the same value all the time (a constant resistance), it will be the Volts that determine the Current that will flow (cause and effect) and Power delivered will be V2/Rload.radaballer said:In a discharging battery, do current and voltage decrease over time? if so how does the battery accomplish the same amount of work over the course of its discharge with a lesser voltage or current?
No, the voltage in a discharging battery decreases as the battery's energy is being used up. This is due to the decrease in the chemical potential energy of the battery's components.
No, the current in a discharging battery also decreases as the battery's voltage drops. This is because the resistance of the battery's components remain the same, but the voltage is decreasing, resulting in a lower current.
The voltage decreases in a discharging battery because the chemical reactions that produce the battery's energy are not able to sustain a constant voltage as the battery's energy is being used up. This results in a decrease in the battery's voltage over time.
The internal resistance of a battery can cause the voltage to drop more quickly during discharge, as it creates a larger voltage drop across the battery's components. However, it also limits the maximum current that can be drawn from the battery, resulting in a decrease in current.
The voltage of a battery is typically more important in determining its state of charge, as it is a direct measure of the battery's energy level. However, the current can also provide valuable information, as a sudden decrease in current can indicate a low battery or other issues. Both voltage and current should be monitored for accurate determination of a battery's state of charge.