Lithium-ion battery is easily confused with what battery?

Knowledge of lithium-ion batteries A battery that uses lithium-containing materials as electrodes. It is a representative of modern high-performance batteries. Introduction of terms Lithium-ion battery is a rechargeable battery whose working principle is that lithium ions move between the positive electrode and the negative electrode. During charging and discharging, Li+ intercalates and deintercalates back and forth between the two electrodes. In rechargeable batteries, lithium ions are extracted from the positive electrode and inserted into the negative electrode through the electrolyte. The negative electrode is in a state rich in lithium. When unloading, the situation is just the opposite. Lithium-ion batteries are easily confused with the following two types of batteries: (1) Lithium-ion batteries: Lithium exists. (2) Lithium-ion polymer battery: replace liquid organic solvent with polymer. Part of the steel shell/aluminum shell/cylinder/soft packaging series: (1) The positive electrode active material is generally lithium manganese oxide or lithium cobalt oxide. Now there are lithium nickel cobalt manganese oxide, lithium iron phosphate for electric bicycles, and 10-20 for fluid collection. Micron electrolytic aluminum foil. (2) Diaphragm A special composite membrane that allows ions to pass through, but at the same time acts as an insulator for electrons. (3) The negative electrode active material is graphite, or carbon with a similar structure to graphite. The conductive collecting liquid adopts electrolytic copper foil of 7-15 microns. (4) The organic electrolyte contains a carbonate solvent of lithium hexafluorophosphate, and the polymer uses a gel electrolyte. (5) The battery shell is divided into steel shell (rarely used nowadays), aluminum shell, nickel-plated iron shell (used for cylindrical batteries), aluminum plastic film (soft packaging), battery cover, and also the positive and negative electrodes of the battery. Lithium-ion battery uses carbon material as the negative electrode and lithium-containing compound as the positive electrode. There is no metal lithium but only lithium ions. This is a lithium-ion battery. Lithium ion battery refers to a battery with lithium ion intercalation compound as the cathode material. The charging and discharging process of lithium ion batteries is the process of intercalation and deintercalation of lithium ions. The embedding and de-embedding of lithium ions is accompanied by the embedding and de-embedding of lithium ions and equivalent electrons (traditionally, the positive electrode is represented by embedding or de-embedding, and the negative electrode is represented by embedding or de-embedding). In the process of charging and discharging, lithium ions are inserted/de-intercalated and inserted/de-intercalated back and forth between the positive electrode and the negative electrode, which is commonly known as the rocking chair battery. Working status and efficiency Li-ion battery has high energy density and high average output voltage. The self-discharge is small, and the battery performance is good, less than 2% per month (recyclable). There is no memory effect. Operating temperature range is -20℃~60℃. Superior cycle performance, fast charging and discharging, charging efficiency up to 100%, and high output power. long lasting. They do not contain toxic and hazardous substances and are called green batteries. Charging is an important step in battery reuse. The charging process of lithium-ion batteries is divided into two stages: constant current charging and constant voltage drop current. In the constant current fast charge stage, the battery voltage is gradually increased to the standard voltage of the battery, and then transferred to the constant voltage stage under the control chip. The voltage is no longer added to ensure that it is not overcharged. The current gradually decreases to the set value as the battery power increases, and the charging is finally completed. The battery life statistics chip calculates the battery life by recording the discharge curve. After repeated use, the discharge curve of the lithium-ion battery will change. Although lithium-ion batteries do not have a memory effect, improper charging and discharging will seriously affect battery performance. Charging precautions Excessive charging and discharging of lithium-ion batteries will cause permanent damage to the positive and negative electrodes. Excessive discharge will cause the collapse of the negative carbon sheet structure, and the collapse will cause the lithium ions to be unable to be inserted during the charging process. Overcharging will cause too many lithium ions to sink into the carbon structure, some of which can no longer be released. The charging capacity is equal to the charging current multiplied by the charging time. Under a certain charging control voltage, the larger the charging current (the faster the charging speed), the smaller the charging capacity. The charging speed is too fast, and the termination voltage is not controlled properly. Statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What fields are battery products widely used in?