What happens to the electrolyte of a storage battery when it is discharged?

When a storage battery is discharged, the electrolyte undergoes a chemical reaction that leads to the conversion of sulfuric acid and water into lead sulfate, which alters the composition of the electrolyte. This process results in a decrease in the concentration of the acid in the electrolyte, as it breaks down and reacts with the lead plates within the battery. As the discharge progresses, the electrolyte can become more diluted, resembling water, but it is not entirely accurate to state that it turns purely to water.

The correct understanding includes recognizing that during discharge, the electrolyte does indeed lose its acidic characteristics over time due to the formation of lead sulfate. This emphasizes the chemical changes that the electrolyte experiences, rather than just a transformation into water. The understanding of this process is crucial for linemen, as it informs decisions regarding maintenance and battery management in electrical systems.