What does the electrolyte level in a nickel-cadmium battery need to be maintained above?

In a nickel-cadmium battery, maintaining the electrolyte level above the tops of the plates is crucial for several reasons. The electrolyte, typically a potassium hydroxide solution, must cover the plates to facilitate the chemical reactions that occur during charging and discharging. If the electrolyte level falls below the tops of the plates, portions of the plates can become exposed to air, leading to potential damage, such as sulfation of the active material, reduced capacity, and ultimately, negative effects on the battery’s performance and lifespan. Furthermore, adequate electrolyte levels help in ensuring efficient heat dissipation and optimal conductivity within the battery. Therefore, keeping the electrolyte above the tops of the plates is essential for the proper functioning and longevity of the nickel-cadmium battery.