Pure electric vehicle A vehicle powered by an electric motor.
Compared with fuel vehicles, the main difference between pure electric vehicles is the four major components: drive motor, speed controller, power battery, and vehicle charger. Relative to gas stations, it consists of public ultra-fast charging stations. The quality difference of pure electric vehicles depends on these four components, and their value also depends on the quality of these four components. The use of pure electric vehicles is also directly related to the selection and configuration of the four major components.
The speed and starting speed of a pure electric vehicle depend on the power and performance of the drive motor. The length of its driving range depends on the capacity of the vehicle's power battery. The weight of the vehicle's power battery depends on the type of power battery selected, such as lead-acid or zinc. Carbon, lithium batteries, etc. have different sizes, specific gravity, specific power, specific energy, and cycle life. This depends on the manufacturer's positioning and use of vehicle grades as well as market definition and market segmentation.
The driving motors of pure electric vehicles include DC brush, brushless, permanent magnet, electromagnetic, and AC stepper motors. Their selection is also related to the vehicle configuration, purpose, and grade. In addition, the speed control of the drive motor is also divided into step speed control and stepless speed control. There are electronic speed control controllers and no speed control controllers. Electric motors include hub motors, inner rotor motors, single motor drives, multi-motor drives, and combined motor drives.
Advantages: The technology is relatively simple and mature, and it can be charged wherever there is a power supply.
Disadvantages: Batteries store too little energy per unit weight. Electric vehicle batteries are more expensive and do not have economies of scale, so the purchase price is relatively expensive. As for the cost of use, some are more expensive than cars, and some are only 1% of cars. /3, which mainly depends on the life of the battery and local oil and electricity prices. Electric vehicle technology is still immature, and charging technology, cruising range, reliability and other aspects still need to be improved. The disposal of scrapped batteries and the optimization of the power grid system are also key issues that need to be solved.