The method used to rapidly charge a nickel-cadmium battery utilizes

The method used to rapidly charge a nickel-cadmium battery utilizes

• A. constant voltage and varying current
• B. constant current at fixed voltage
• C. pulsed charging with fixed voltage
• D. constant current with temperature compensation

Answer: (A)

Rapid charging of nickel-cadmium batteries is accomplished by holding a fixed charging voltage across the cell while the current that the battery draws changes as it charges. As the NiCd cell starts from a lower state of charge, the difference between the applied voltage and the cell’s actual voltage pushes a larger current into the cell, delivering charge quickly. As the cell approaches full, its terminal voltage under charge rises toward the applied voltage and its internal resistance changes, so the current tapers off. This setup lets a charger deliver a high initial rate for rapid charging while naturally reducing current as the battery nears full, helping to prevent overcharging. In practice, rapid NiCd charging is often paired with safeguards such as temperature monitoring or end-of-charge detection to terminate charging at the appropriate time.

Rapid charging of nickel-cadmium batteries is accomplished by holding a fixed charging voltage across the cell while the current that the battery draws changes as it charges. As the NiCd cell starts from a lower state of charge, the difference between the applied voltage and the cell’s actual voltage pushes a larger current into the cell, delivering charge quickly. As the cell approaches full, its terminal voltage under charge rises toward the applied voltage and its internal resistance changes, so the current tapers off. This setup lets a charger deliver a high initial rate for rapid charging while naturally reducing current as the battery nears full, helping to prevent overcharging. In practice, rapid NiCd charging is often paired with safeguards such as temperature monitoring or end-of-charge detection to terminate charging at the appropriate time.