What are the types of lithium batteries?

　　1. According to the external materials, lithium batteries are generally divided into two categories: lithium metal batteries usually use manganese dioxide as the positive electrode material, metal lithium or its alloy metal as the negative electrode material, and non-aqueous electrolyte solution. Lithium ion battery: Lithium alloy metal oxide is generally used as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte. Although the energy density of lithium metal battery is very high, theoretically it can reach 3860W kg. However, due to its unstable nature, it cannot be charged and used as a power battery for reuse. Lithium ion battery has become the main power battery due to its rechargeable capacity. However, due to their coordination with different elements, the performance of cathode materials varies greatly in all aspects, leading to an increase in disputes over cathode material routes in the industry.

　　2. According to the purpose, the first type is digital lithium battery, which is our daily mobile phones, tablets, mobile power supplies, etc. These are digital batteries. The second is power lithium battery, which is used by Tesla, BYD, some new energy electric vehicles, unmanned aerial vehicles and other products. These batteries need large instantaneous current, while digital batteries cannot meet the requirements of large instantaneous current. Therefore, this kind of battery, also known as high-speed battery, is more expensive than digital battery.

　　3. According to the shell material, the first type is steel shell battery. As the name implies, the shell is made of steel. The second type is aluminum case battery. Similarly, the housing is made of aluminum. The third type is polymer lithium battery. The shell is a polymer material, mostly silver. A few manufacturers produce black, which has become black in the industry.

　　4. According to the shape, the first type is cylindrical battery, which is widely used, such as 1865026650. This combination is generally used, and a few combinations can be used as digital products. For example, among the late laptops, there are generally 8 18650, mobile power, 1-5 or 6 combinations, and more than 7000 series parallel combinations of Tesla 18650. Second, square batteries, mainly polymer batteries, can be made into a variety of shapes because of their good ductility. The length, width and height can be adjusted at will. Most digital products now use this battery. Third, special-shaped batteries are some strange batteries. According to the needs of the product, the battery also needs a matching shape. For example, popular smart wearable products, such as smart bracelets, are all circular, so the battery is also made into a circular.

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