Lithium-ion battery mainly consists of positive and negative electrode materials, electrolyte, diaphragm, fluid collector and battery shell, positive and negative electrode materials consist of two different lithium-ion embedded compounds. When charging, lithium ions are embedded in the negative electrode through. In the impact of the reversible capacity of the battery. The process of electrode material de and embedded lithium-ion is always the process of. The manufacturing process of a li-ion battery mainly includes positive and negative electrode dosing, coating, production, winding, shelling, liquid injection, sealing and formation. In the battery production process, the requirements for each step. Lithium-ion battery charging and discharging cycle is the process of lithium ions through the electrolyte in the positive and negative electrode material back and forth between the process. The use of lithium-ion battery environment in its cycle life is also very important. Among them, the ambient temperature is a very important factor. The ambient temperature is too low or too high will affect the cycle life of lithium batteries. The constant voltage charging.