The selection and quality of electrode materials are crucial to the battery cycle life. The use of high-purity, high-performance positive and negative electrode materials, such as lithium cobalt oxide with a stable crystal structure, can reduce the structural changes and side reactions of the electrodes during the charge and discharge process, thereby improving the cycle stability of the battery. At the same time, the development of new electrode materials, such as silicon-based composite materials, can further improve the capacity and cycle life of the battery.
Reasonable charge and discharge control is the key to extending the cycle life. Avoid overcharging and overdischarging, and charge and discharge should be performed between 20% and 80% of the remaining battery power. Use a charger with precise charge and discharge management function, set the appropriate charging current and voltage according to the specifications of the small polymer lithium battery, and prevent overcharging from causing battery heating and bulging, and overdischarging from causing irreversible damage to the battery.
Optimize the internal structure of the small polymer lithium battery, such as using a multi-layer composite diaphragm to improve the stability and ion conductivity of the diaphragm and prevent the positive and negative electrodes from directly contacting and short-circuiting. At the same time, the battery's ear structure should be reasonably designed to reduce the battery's internal resistance and reduce the heat generated during the charge and discharge process, thereby extending the battery life.
The electrolyte has a significant impact on battery performance and life. Research and develop high-performance electrolytes, add appropriate additives such as film-forming additives, flame-retardant additives, etc., to form a stable protective film on the electrode surface, inhibit the decomposition of the electrolyte and the corrosion of the electrode, and improve the cycle stability and safety of the battery.
Temperature is an important factor affecting the battery life. In the design and use of small polymer lithium batteries, thermal management should be strengthened. For example, a battery shell with good heat dissipation performance is used, and a temperature sensor and heat dissipation device are set in the battery pack. When the battery temperature is too high, the heat is dissipated in time to avoid long-term use or charging in a high temperature environment to slow down the aging of the battery.
Strictly control the process parameters in the battery production process to ensure the consistency and stability of the electrode preparation, battery assembly and other links. Improve the cleanliness of the production environment, reduce the mixing of impurities into the battery, avoid internal short circuits or side reactions caused by impurities, and thus improve the overall quality and cycle life of the battery.
During use, avoid severe vibration, extrusion and impact on the small polymer lithium battery. When the battery is not in use, it should be stored in a dry and cool environment, maintain an appropriate amount of power, and perform regular charge and discharge maintenance to prevent the battery from self-discharge and over-discharge, which affects the cycle life.
