18650 lithium battery charging principle

18650 lithium battery charging principle The working principle of lithium battery is charging and discharging. When the battery is charged, lithium ions are formed at the positive electrode of the battery, and the lithium ions reach the negative electrode through the electrolyte. Carbon is the negative electrode and has a layered structure with many micropores. Lithium ions reaching the negative electrode are inserted into the micropores of the carbon layer. The more lithium ions are inserted, the greater the charging capacity. Similarly, when the battery is discharged (the process we use the battery), the lithium ions embedded in the negative electrode carbon will come out and return to the positive electrode. The more lithium ions return to the positive electrode, the greater the discharge capacity. The battery capacity we usually call refers to the discharge capacity. It is not difficult to see that during the charging and discharging process of lithium batteries, lithium ions are in a state of movement from the positive electrode to the negative electrode and then to the positive electrode. If we compare the lithium battery to a rocking chair, the two ends of the rocking chair are the two poles of the battery, and the lithium ion is like an excellent athlete running back and forth on both ends of the rocking chair. Therefore, the experts gave the lithium battery a lovely name: rocking chair battery. The use of 18650 lithium batteries in power lithium-ion batteries uses professional lithium secondary batteries, thanks to its superior performance. With the continuous development of lithium secondary battery technology, it has been widely used in our daily lives; rechargeable batteries are a very commonly used battery and are more and more popular with consumers. Attaches great importance to the power occupation of batteries, fully aware of batteries, so that we can do my use, now 18650 lithium batteries have certain uses in the following categories. 1. Energy storage is mainly used in base station power supplies, clean power supplies, grid energy storage, and household optical storage systems. 2. The power supply category firstly refers to electric vehicles, electric bicycles, new energy vehicles, etc. 3. Digital mobile phones, tablet computers, notebook computers, electric toys, MP3/MP4, earphones, charging bags, model airplanes, mobile power supplies, etc. There are three ways to identify the positive and negative electrodes of the 18650 lithium battery. 1: The protruding head of the 18650 lithium battery is the positive electrode and the bottom is the negative electrode. Method 2: When measuring with a multimeter, the red and black test leads show positive red line as +, black as -, negative red pen as-electrode, and black as + electrode; Method 3: Look at the screen, there is one on the screen The screen is generally a negative statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Three taboos for the use of lithium batteries in electric vehicles