How is the lithium battery charged?

Lithium battery charging is divided into two stages: 1. Constant current charging, that is, the current is constant, and the voltage of the lithium battery gradually increases with the charging process. According to the above specifications, it is generally charged with a current of 0.2C (C is the nominal capacity and current of the battery). A comparison method, 0.2C is 200mA), when the battery voltage is close to the full voltage of 4.2V, change the constant current charging to constant voltage charging. This process is about five hours. 2. Constant voltage charging, that is, the voltage is constant, and the current gradually decreases as the saturation of the cell deepens. According to the specification, when the current decreases to 0.01C or 10mA, the charging is considered to be terminated. After this process and the constant current charging time are added together, the total charging time should not exceed eight hours. Therefore, there are two criteria for judging whether the lithium battery has reached saturation: one is that the current is 0.01C, and the other is that the total time does not exceed eight hours. In other words, if the lithium battery charging process still cannot reach 0.01C after eight hours, then It is regarded as a non-conforming product. At this point, we have a theoretical understanding of how to charge the lithium battery. When charging the lithium battery, the user only needs to charge it according to the method in the formal charger manual, because the formal lithium battery charger is based on the lithium battery. The characteristics of the charging mode is designed, that is, the process of constant current and constant voltage charging, we only need to judge whether the battery is fully charged according to the indicator light of the charger. If the charger is abnormal, we can use 8 hours as the basis (the premise is that your charger is 0.1C). Lithium battery: It is a kind of secondary battery (rechargeable battery), which mainly depends on the movement of lithium ions between the positive electrode and the negative electrode to work. During charging and discharging, Li+ intercalates and deintercalates back and forth between the two electrodes: during charging, Li+ deintercalates from the positive electrode and inserts into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Lithium batteries are divided into lithium batteries and lithium batteries. Cell phones and notebook computers use lithium batteries, which are commonly referred to as lithium batteries. Batteries generally use materials containing lithium as electrodes, which are representative of modern high-performance batteries. The real lithium battery is rarely used in daily electronic products because of its high risk. The lithium battery was first successfully developed by Sony Corporation of Japan in 1990. It embeds lithium ions into carbon (petroleum coke and graphite) to form a negative electrode (traditional lithium batteries use lithium or lithium alloy as the negative electrode). LixCoO2 is commonly used as the cathode material, and LixNiO2, and LixMnO4 are also used. The electrolyte uses LiPF6 + diethylene carbonate (EC) + dimethyl carbonate (DMC). Petroleum coke and graphite are non-toxic as negative electrode materials, and the resources are sufficient. Lithium ions are embedded in carbon, which overcomes the high activity of lithium and solves the safety problems of traditional lithium batteries. The positive electrode LixCoO2 can reach the charging and discharging performance and life. The higher level reduces the cost, and in short, the overall performance of the lithium battery is improved. It is expected that lithium batteries will occupy a large market in the 21st century. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the differences between lithium batteries and nickel-metal hydride batteries?