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The electrolyte is a conductive ionic conductor between the positive pole and the positive pole of the battery. It is composed of electrolyte lithium salt, high-purity organic solvent, necessary additives and other raw materials in a certain proportion. It plays an important role in the energy density, power density, extensive temperature applications, cycle life and safety performance of batteries.

The lithium iron phosphate battery is a lithium ion battery with lithium iron phosphate (LiFePO4) as the negative electrode material and carbon as the negative electrode material. During the charging process, part of the lithium ions of the lithium iron phosphate will escape, pass through the electrolyte to the cathode, and intercalate the cathode carbon species.

As one of the core carriers of modern energy technology, the application advantages of lithium-ion batteries have shown far-reaching impacts in many fields.

In terms of materials used, the positive electrode materials of polymer lithium ion batteries are divided into lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate materials. The negative electrode is graphite, and the working principle of the battery is basically the same. The important difference between the positive electrode materials of polymer lithium ion batteries lies in the difference of electrolytes. Liquid lithium ion batteries use liquid electrolytes, and polymer lithium ion batteries use solid polymer electrolytes instead. This polymer can be dry or glued. At present, most of the polymer gel electrolytes are used.

Lithium ion batteries have been widely used in notebook computers, video cameras, mobile communications and other portable appliances due to their unique performance advantages. At present, the large capacity lithium ion battery developed has been put into trial use in electric vehicles, and is expected to become one of the main power sources of electric vehicles in the 21st century, and be applied in artificial satellites, aerospace, energy storage and other fields. So, what are the main advantages of lithium batteries for electric vehicles?