1. Blade Electric Vehicles (BEV) are vehicles that use bai single battery as the energy storage power source, which supplies electric energy to the motor through the battery to drive the motor to run, thus promoting the vehicle to run.

2. a Hybrid Electric Vehicle (HEV) refers to a vehicle whose drive system is composed of two or more single drive trains that can run at the same time, and the driving power of the vehicle is provided by a single drive train or a plurality of drive trains * * * according to the actual driving state of the vehicle. Due to different components, layout and control strategies, hybrid electric vehicles have many forms.

3. Fuel Cell Electric Vehicle (FCEV) is an automobile driven by the electrochemical reaction of hydrogen and oxygen in the air under the action of catalyst. Fuel cell electric vehicle is essentially a kind of pure electric vehicle, and the main difference lies in the different working principles of power battery. Generally speaking, the fuel cell converts chemical energy into electric energy through electrochemical reaction, and the reducing agent required by electrochemical reaction generally adopts hydrogen, while the oxidizing agent adopts oxygen. Therefore, the earliest developed fuel cell electric vehicles mostly use hydrogen fuel directly, and hydrogen can be stored in the form of liquefied hydrogen, compressed hydrogen or metal hydride.