Lithium battery classification
Lithium battery classification
1. According to internal materials, lithium batteries are usually divided into two categories:
（1）Lithium metal battery: A lithium metal battery is generally a battery using manganese dioxide as a positive electrode material, metallic lithium or an alloy metal thereof as a negative electrode material, and a nonaqueous electrolyte solution.
（2）Lithium-ion battery: A lithium-ion battery is generally a battery using a lithium alloy metal oxide as a positive electrode material, graphite as a negative electrode material, and a non-aqueous electrolyte.
Although the lithium metal battery has a high energy density, it can theoretically reach 3,860 watts/kg. However, since it is not stable enough and cannot be charged, it cannot be used as a power battery for repeated use. Lithium-ion batteries have been developed as the main power battery due to their ability to be repeatedly charged. However, because of its combination with different elements, the composition of the cathode material varies greatly in various aspects, leading to an increase in the industry's disputes over the cathode material route.
Generally, the most commonly used power batteries are lithium iron phosphate batteries, lithium manganate batteries, lithium cobalt oxide batteries, and ternary lithium batteries (ternary nickel cobalt manganese).
2, by purpose; can also be divided into two categories:
（1） The digital battery, which is the daily mobile phone, tablet, mobile power supply, etc. These are all digital batteries.
（2）The power battery, which is Tesla, BYD some new energy electric vehicles, and batteries for products such as drones. These batteries require a large amount of instantaneous current, and digital batteries can not meet the instantaneous high current, so this The class is also called a high rate battery, and the price is more expensive than the digital battery.
3, according to the shell material, can be divided into three categories:
（1）The first category, steel-shell batteries, as the name implies, is that the outer casing is steel.
（2）The second type, the aluminum shell battery, the same shell is made of aluminum.
（3）The third category, polymer batteries, the outer shell is a polymer material, mostly silver, a few manufacturers do black, the industry becomes black leather.
4, according to the shape is also divided into three categories:
（1）Cylindrical battery, this kind of use, such as 18650, 26650, etc., this general combination, the combination of less can be used as a digital product, like the early notebook computer, generally 8 18650, mobile power, A combination of five to six, and Tesla's more than 7,000 18650 series-parallel combination.
（2）Square batteries, most of which are polymer batteries, because this polymer has good ductility and can be made in many shapes. The length, width and height can be adjusted at will. Now most digital products use these batteries. .
（3）The third type of shaped battery is some grotesque battery. According to the demand of the product, the battery should also have the matching shape. For example, the popular smart wearable products, such as the smart bracelet, are ring-shaped, so the battery is also made into a ring shape.