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Lithium ion batteries are widely used and close to life. Application of capacity lithium ion battery: solar street lamp, UPS backup power supply, mobile power supply, notebook mobile phone battery, lighting system, energy storage system, medical equipment, financial equipment. Smart home, etc.

Power lithium-ion battery uses: electric vehicles, mopeds, electric things, e-cigarettes, aircraft models, etc.

Lithium ion batteries can be divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. Lithium metal battery, the fifth generation product of rechargeable battery, was born in 1996. Its serenity, specific capacity, self discharge rate and function value ratio are better than lithium ion battery. Due to its own high skill requirements, only a few countries are producing this kind of lithium metal battery.

Polymer battery is a polymer lithium-ion battery, which is a kind of lithium-ion battery. The advantages of polymer lithium-ion battery are summarized as follows:

1. the capacity density is large, and its capacity density is 1.5-2.5 times of that of Ni h battery or Ni Cd battery, or higher;

2. the self discharge is small, and its capacity loss is also small after a long time;

3. long life, and its cycle life can reach more than 500 times in normal use;

Characteristics of Li ion battery:

1. High energy and long service life.

2. Rated voltage high energy suffers high power.

3. Low self discharge rate, light weight, suitable for rough temperature.

4. Green environmental protection, regardless of production, use and scrap, does not contain or present any toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium.

Lithium ion battery is considered to be one of the most important energy storage technologies. Because of its low cost, high performance, high power and green environment, Li ion battery has become a typical representative of new energy. It is widely used in 3C digital products, mobile power supply and electric vehicles.