Quality Control of Energy Storage Batteries

　　Quality control is an integral part of the production of nickel - cadmium energy storage batteries to ensure that the final products meet high - performance standards.

　　During raw material inspection, as described in the procurement section, each batch of raw materials is tested thoroughly. In - house laboratories use advanced analytical techniques such as atomic absorption spectroscopy to determine the purity of nickel and cadmium - based materials. Any batch of raw materials that fails to meet the specified quality standards is rejected to prevent sub - standard products from entering the production line.

　　In - process quality control is carried out at each stage of production. For example, during electrode coating, the thickness of the coating is continuously monitored using non - contact thickness gauges. If the coating thickness deviates from the specified range, the coating process is adjusted immediately. The density of the electrodes after calendaring is also checked to ensure they meet the required mechanical and electrochemical properties.

　　After battery assembly, visual inspection is performed to check for any signs of physical damage, such as cracks in the casing or misalignment of the electrodes. Electrical tests are then conducted. The open - circuit voltage of the battery is measured to ensure it is within the expected range. The internal resistance of the battery is also tested. A high internal resistance could indicate problems such as poor electrode - electrolyte contact or a defective separator.

　　Battery performance testing is a crucial part of quality control. The batteries are subjected to charge - discharge cycles under various conditions to evaluate their capacity, charge - discharge efficiency, and cycle life. The capacity of the battery is measured by fully charging it and then discharging it at a specified current until a cut - off voltage is reached. The charge - discharge efficiency is calculated as the ratio of the energy output during discharge to the energy input during charge. The cycle life is determined by repeatedly charging and discharging the battery until its capacity drops to a certain percentage of its initial value.

　　Finally, environmental testing is carried out. Batteries are exposed to different temperatures, humidity levels, and mechanical vibrations to simulate real - world usage conditions. This helps to ensure that the batteries can maintain their performance and integrity under various environmental stresses. Only batteries that pass all these quality - control tests are approved for packaging and distribution, ensuring that consumers receive high - quality nickel - cadmium energy storage batteries.

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