The wireless data terminal installed in the electric vehicle itself needs to supply electricity, but its power consumption is very low, and it hardly costs electricity to use, which will not significantly affect the driving range of the electric vehicle. On the contrary, the installation of wireless data terminals can monitor the operating status, load, energy consumption and other information of the electric vehicle in real time, help the owner better grasp the vehicle situation, further improve the energy efficiency of the electric vehicle, reduce the number of charging times and charging time, so as to reduce the charging cost and daily maintenance costs. Therefore, the installation of wireless data terminals in electric vehicles is a sustainable development measure worth promoting.