The higher the battery energy density, the better?

In the case where the same energy consumption is constant and the volume and weight of the battery pack are strictly limited, the single maximum mileage of the new energy vehicle depends mainly on the energy density of the battery. The greater the energy density of the battery, the more electricity is stored per unit volume, or weight.

The energy density of a battery often points to two different concepts, one is the energy density of a single cell, and the other is the energy density of a battery system. The battery cell is the smallest unit of a battery system. M batteries form a module, and N modules form a battery pack, which is the basic structure of the vehicle power battery.

At present, the energy density of the ternary lithium battery with higher energy density is only 200 mAh/g. At present, the increase in energy density is limited to increasing the size of the battery, and it takes a lot of time to achieve qualitative change through the transformation of the chemical system.

For the industry, the improvement of battery energy density seems to restrict the future development of pure electric vehicles. In addition, the level of production technology also affects battery energy density.