First, according to the internal material lithium batteries are usually divided into two categories.
1. Lithium metal batteries: lithium metal batteries are generally used manganese dioxide as the cathode material, lithium metal or its alloy metal as the cathode material, the use of non-aqueous electrolyte solution battery.
2. Lithium-ion battery: Lithium-ion battery is generally a battery using lithium alloy metal oxide as the cathode material, graphite as the negative electrode material, and using non-aqueous electrolyte.
Although the energy density of lithium metal battery is high, theoretically it can reach 3860 watts/kg. However, it cannot be used as a power battery for repeated use because its nature is not stable enough and cannot be recharged. Lithium-ion batteries, on the other hand, have been developed as the main power battery due to their ability to be recharged repeatedly. However, because of its combination with different elements, the cathode material composed of various aspects of performance varies greatly, leading to increased disputes in the industry on the route of cathode material.
Usually we say the most power battery mainly lithium iron phosphate, lithium manganese acid, lithium cobalt acid and ternary lithium batteries (ternary nickel cobalt manganese)
Second, according to the use can also be divided into two categories:
The first is the digital battery, is our daily use of cell phones, tablets, mobile power, etc., these are digital batteries.
The second is the power battery, that is, Tesla, BYD some new energy electric cars, and drones and other products with the battery, these batteries require a large instantaneous current, digital batteries can not meet the instantaneous high current, so this type is also called high rate battery, the price is more expensive than the digital battery.
Third, according to the shell material can be divided into three categories:
The first category, steel-cased batteries, as the name implies is the shell is steel.
The second category, aluminum shell battery, the same shell is made of aluminum.
The third category, polymer batteries, the shell is a polymer material, mostly silver, a few manufacturers do is black, the industry has become the black skin.
Fourth, according to the shape is also three categories:
The first, cylindrical batteries, this kind of used a lot, like 18650, 26650 and so on, this general combination of use, the combination of less can be used as digital products, like early laptops, generally eight 18650, mobile power, a combination of five or six ranging from one to Tesla's 7000 more than 18650 series-parallel combination.
The second, square batteries, most of these are polymer batteries, because this polymer ductility is very good, you can make a lot of shape, length, width and height can be adjusted at will, now most digital products are using this type of battery.
The third, shaped battery, is some strange-shaped battery, according to the needs of the product battery also want to match the shape, such as the popular smart wear products, such as smart bracelet is ring-shaped, so the battery is also made of ring-shaped.
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