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What is an EV car?

1 Answers

MirandaRose

07/24/25 1:24am

EV stands for Electric Vehicle, which refers to vehicles propelled by electric motors or traction motors on the road. There are mainly three types of electric vehicles: those powered directly by external electricity; those powered by stored electricity from external sources; and those equipped with onboard generators, such as internal combustion engines (hybrid electric vehicles) or hydrogen fuel cells. Electric vehicles consist of: electric drive and control systems, mechanical systems like drive force transmission, and working devices for completing specific tasks. The electric drive and control system is the core of an electric vehicle and the biggest difference from internal combustion engine vehicles. The electric drive and control system is composed of a drive motor, power source, and motor speed control device. Other components of electric vehicles are basically the same as those of internal combustion engine vehicles. The power sources mainly include sodium-sulfur batteries, nickel-cadmium batteries, lithium batteries, and fuel cells. The power source provides electrical energy to the drive motor of the electric vehicle, and the motor converts the electrical energy into mechanical energy. The motor speed control device is set up for functions like speed change and direction reversal in electric vehicles. Its role is to control the voltage or current of the motor, thereby managing the drive torque and rotation direction of the motor. The transmission device in an electric vehicle transfers the drive torque from the motor to the vehicle's drive axle. When using electric wheel drive, many components of the transmission device can often be omitted. Since the motor can start under load, electric vehicles do not require the clutch found in traditional internal combustion engine vehicles. Advantages of electric vehicles: no pollution, low noise, single electric energy source, simple structure, easy maintenance, high energy conversion efficiency, and the ability to balance peak and off-peak grid loads.

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