What is the importance of power lithium batteries to increase energy density?

The power battery replaces the fuel tank of the fuel tank in a certain sense, and the capacity can be increased to obtain longer endurance. However, the structural design of the modern car has long been fixed, even if the pure EV is being developed. The layout space reserved for the power cell is only a fixed position between the front and rear axes.

Under the premise that the layout space can not be changed, increasing the overall capacity of the battery is the basis for solving the problem of endurance. In essence, since the beginning of 13 years, the mileage of domestic pure electric vehicles has been increased from 150 kilometers to about 400 kilometers, behind the renewed mileage. The power battery tends to obtain a larger battery capacity with lighter preparation quality. As a core upgrade, the battery energy density is.

In essence, lithium-ion batteries refer to battery assemblies made of Ionic embedded compounds as positive materials. Whether it is ternary lithium, or lithium iron phosphate battery. The overall process of charge and discharge is basically the same, the difference is that different materials pursue different performance orientations.

Lithium-ion batteries are mainly composed of a positive electrode + electrolyte + negative electrode. Positive electrode materials mostly use compounds containing metallic lithium, and negative poles mostly use graphite or carbon materials. The organic solvent between the two is an electrolyte. When charging, the positive electrode decomposes into lithium ions, enters the battery negative electrode through the electrolyte, and is embedded in the negative electrode material. During discharge, lithium ions embedded in the negative electrode material return to the positive electrode through the electrolyte, and the more lithium ions returned to the positive electrode, the higher the battery capacity.

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