Electric vehicles are a common industrial equipment, widely used in various industries. In order to obtain better marking effects and improve product quality, the marking effect can be quickly improved through simple adjustments. Electric vehicles use gas as the working medium, and use current to stimulate the energy level transition of gas molecules to generate laser beams for marking. The method of increasing the current of electric vehicles is to increase the current size and improve the excitation effect, so as to obtain stronger laser power and better marking effects. 1. Rapidly improve the marking effect: By increasing the current, the laser power increases, the marking speed is faster, and the effect is more obvious. 2. Support the marking of multiple materials: The laser has the characteristics of high power and uniform energy density over a large area, which is suitable for the marking of multiple materials, such as plastics, rubber, wood, glass, etc. 3. Simple and convenient adjustment: Electric vehicle current adjustment is a relatively simple and convenient operation method, even if the workers are not familiar with the equipment, they can quickly adjust it.