What types of lithium batteries are there?

1，Lithium batteries are usually divided into two categories according to internal materials

Lithium metal battery: Lithium metal battery generally uses manganese dioxide as the positive electrode material, metallic lithium or its alloy metal as the negative electrode material, and uses a non-aqueous electrolyte solution.

Lithium-ion battery: Lithium-ion battery generally uses lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and a non-aqueous electrolyte.

Although the energy density of lithium metal batteries is high, it can theoretically reach 3860 watts/kg. However, because its properties are not stable enough and cannot be recharged, it cannot be used as a power battery for repeated use. Lithium-ion batteries are developed as the main power batteries due to their ability to be charged repeatedly. However, because they are combined with different elements, the performance of the cathode materials they form varies greatly in various aspects, which has led to increased disputes over the cathode material route in the industry.

2，According to use

The first one is digital lithium battery, which is the mobile phone, tablet, mobile power supply, etc. that we use every day. These are all digital batteries.

The second type is power lithium batteries, which are batteries used in some new energy electric vehicles such as Tesla and BYD, as well as drones and other products. These batteries require a large instantaneous current. Digital batteries cannot meet the instantaneous large current, so This type of battery is also called a high-rate battery and is more expensive than a digital battery.

3，According to shell material

The first category, steel-cased batteries, as the name implies, is that the outer casing is made of steel.

The second category is the aluminum shell battery. Similarly, the shell is made of aluminum.

The third category, polymer lithium batteries, has a casing made of a polymer material, mostly silver. A few manufacturers make black batteries, which is considered black in the industry.

4，According to shape

The first type is cylindrical battery, which is widely used, such as 18650, 26650, etc., which are generally used in combination. Those with fewer combinations can be used as digital products, such as early laptops, usually 8 18650, mobile power supply, There are combinations ranging from one to five or six, as well as Tesla’s more than 7,000 18,650 series and parallel combinations.

The second type is prismatic batteries. Most of these are polymer batteries, because this polymer has good ductility and can be made into many shapes. The length, width and height can be adjusted at will. Most digital products now use this type of battery. .

The third type, special-shaped batteries, are some strange-shaped batteries. The battery must be in a matching shape according to the needs of the product. For example, the current popular smart wearable products, such as smart bracelets, are ring-shaped, so the batteries are also made in a ring shape.

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