- #1
Cici2017
if a cell is running down, there would be a constant drop in p.d. across the cell, does the internal resistance of the cell increase or decrease?
Internal resistance of a battery cell is the resistance that is found within the battery's own components, such as the electrolyte, electrodes, and connections. It is a measure of how much the battery resists the flow of electric current.
Internal resistance is typically measured by applying a known load to the battery and measuring the voltage drop across the terminals. The ratio of this voltage drop to the current drawn is the internal resistance of the battery.
Internal resistance is important because it affects the performance of the battery. A higher internal resistance means that the battery will have a lower voltage and will not be able to deliver as much power as a battery with lower internal resistance.
Temperature can have a significant impact on the internal resistance of a battery cell. As the temperature increases, the internal resistance decreases, leading to higher currents and potentially damaging the battery. On the other hand, a decrease in temperature can increase the internal resistance, reducing the battery's performance.
Some factors that can increase internal resistance of a battery cell include age, high or low temperatures, overcharging or deep discharging, and physical damage to the battery. These factors can lead to changes in the battery's internal chemistry, resulting in an increase in internal resistance.