Production Technology of Nickel - Cadmium Energy Storage Batteries

　　The first step is electrode preparation. For the positive electrode, nickel hydroxide powder is mixed with additives such as cobalt oxide to improve its electrochemical performance. The mixture is then combined with a binder, usually a polymer like polyvinylidene fluoride (PVDF), and a solvent. This slurry is then coated onto a nickel - based current collector, which is often a perforated nickel sheet. The coating process is carefully controlled to ensure a uniform thickness. After coating, the electrode is dried and calendared to improve its density and mechanical strength.

　　For the negative electrode, cadmium - based materials are processed in a similar way. Cadmium oxide is mixed with appropriate additives and binders. In some cases, cadmium metal may be used, which is first oxidized and then processed into a suitable form for electrode preparation. The negative - electrode slurry is also coated onto a current collector, typically a cadmium - plated steel sheet.

　　Next is the assembly process. The positive and negative electrodes are stacked alternately with separators in - between. The separators, as mentioned before, play a crucial role in preventing short - circuits. The electrode - separator stack is then inserted into a battery casing, which is usually made of nickel - plated steel for good electrical conductivity and corrosion resistance.

　　After assembly, the electrolyte, a potassium hydroxide solution, is injected into the battery casing. The amount of electrolyte injected is carefully controlled to ensure proper ion transport within the battery. The battery is then sealed to prevent leakage of the electrolyte and entry of air, which could react with the electrodes and degrade the battery performance.

　　The final step is activation and formation. The newly assembled battery undergoes a series of charge - discharge cycles to activate the electrodes and form the necessary electrochemical interfaces. These initial charge - discharge cycles help to optimize the battery's performance, such as its capacity, charge - discharge efficiency, and cycle life. The formation process is carefully monitored, and the charge - discharge parameters are adjusted according to the battery's characteristics. Through these precise production processes, nickel - cadmium energy storage batteries are manufactured to meet specific performance requirements.

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