Popular science! Knowledge of electric vehicle batteries and motors

Electric vehicles are deeply loved by consumers because of their environmental protection and convenience. The electric vehicle battery and motor are its most important components. The following author will give you the knowledge of electric vehicle batteries and motors.　　Electric vehicle battery: 　　The vast majority of current electric vehicles are equipped with lead-acid batteries, because lead-acid batteries are low in cost and cost-effective. In 1859, Plante of France invented a battery using lead as an electrode. The unique feature of this kind of battery is that when the battery voltage drops after a period of time, it can be supplied with reverse current to make the battery voltage rise. Because this battery can be recharged and can be used repeatedly, it is called a 'lead-acid battery'. In recent years, lithium batteries have also been used in electric vehicle batteries, so I won't go into details here.　　　　Electric vehicle motor: 　　Electric vehicle motor has different forms according to its use environment and frequency. Different types of motors have different characteristics. Electric vehicle motors generally use permanent magnet DC motors. The so-called permanent magnet motor refers to a method in which the motor coil is excited by permanent magnets instead of coil excitation. This saves the electric energy consumed by the excitation coil and improves the electromechanical conversion efficiency of the motor. This can reduce the driving current and extend the driving range for electric vehicles that use limited energy on-board. Electric vehicle motors are classified according to the energization form of the motor, which can be divided into two categories: brushed motors and brushless motors; according to the mechanical structure of the motor assembly, they are generally divided into 'toothed' (the motor speed is high, and it needs to go through the gear Deceleration) and 'toothless' (motor torque output does not undergo any deceleration) two categories. An electric motor is a rotary electric machine that converts electrical energy into mechanical energy. It mainly includes an electromagnet winding or distributed stator winding to generate a magnetic field and a rotating armature or rotor.　　Electric vehicle batteries and motors are equivalent to the human brain and heart. Their importance is self-evident. I believe that after reading the above content, everyone has a certain understanding of electric vehicle batteries and motors. Previous: Waterproof knowledge of electric vehicle battery