Classification and analysis of lithium batteries

1. Lithium batteries are generally divided into two categories according to internal materials: 1. Lithium metal batteries: Lithium metal batteries generally use manganese dioxide as the positive electrode material, lithium metal or its alloy metal as the negative electrode material, and use a non-aqueous electrolyte solution. 2. Lithium batteries: Lithium batteries generally use lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte. Although the energy density of lithium metal batteries is high, theoretically it can reach 3860 watts/kg. However, due to its insufficient stability and inability to charge, it cannot be used as a power lithium-ion battery for repeated use. The lithium battery has been developed as an important power lithium-ion battery due to its ability to be recharged. However, because of its combination of different elements, the composition of the cathode material has very different properties in various aspects, which has led to increased disputes in the industry over the route of the cathode material. Usually, the power lithium-ion batteries we talk about most include lithium iron phosphate batteries, lithium manganese oxide batteries, lithium cobalt oxide batteries, and ternary lithium batteries (ternary nickel cobalt manganese). 2. According to the purpose, it can also be divided into two categories: The first one is digital batteries, which are the mobile phones, tablets, mobile power supplies and so on that we use daily. These are all digital batteries. The second is the power lithium-ion battery, which is used by Tesla, BYD, some new energy electric vehicles, and drones and other products. These batteries require a large instantaneous current, and digital batteries cannot meet the instantaneous large current. Therefore, this type of battery is also called high-rate battery, which is more expensive than digital batteries. 3. According to the shell material, it can be divided into three categories: the first category, steel shell batteries, as the name implies, the shell is made of steel. The second category, aluminum shell batteries, similarly, the shell is made of aluminum. The third category, polymer batteries, the outer shell is a polymer material, mostly silver, a few manufacturers make black, the industry has become black. Four. According to the shape, there are also three categories: the first type, cylindrical batteries, which are used a lot, like 18650, 26650, etc., this kind of general combination use, and the combination of less can be used as digital products, like early notebook computers , Generally 8 18650, mobile power, one to five or six combinations, there are more than 7000 series and parallel combinations of Tesla's 18650. The second type is square batteries. Most of these batteries are polymer batteries, because this polymer is very malleable and can be made into many shapes. The length, width and height can be adjusted at will. At present, most digital products use this type of battery. . The third type, abnormal-shaped batteries, are some weird-shaped batteries. According to the needs of the product, the battery should also have a matching shape, which is more popular than today's smart wearable products. For example, smart bracelets are ring-shaped, so the battery is also made into a ring shape. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.