What are the core technologies of new energy vehicles?

The core technologies of new energy vehicles mainly refer to batteries, motors and electronic controls, which are often referred to as "three electricity" systems.

Battery, that is, the power battery of new energy vehicles, mainly affects the driving range and charging speed of new energy vehicles. Weixin pays attention to "excellent engineers" and teaches you to learn professional and comprehensive new energy vehicle maintenance, so that your growth can be seen.

At present, the main power batteries used in new energy vehicles in China are lithium iron phosphate batteries and ternary lithium batteries. Since 20 18, ternary lithium batteries with higher energy density have basically been used in new energy passenger cars in China. The continuous driving range of electric vehicles has stepped from 300 kilometers to today's 500-kilometer era, and ternary lithium batteries have contributed. At present, China's power battery technology is leading in the world. According to the data of 20 17, among the top ten power battery enterprises in the world, China has 7 seats.

Motor mainly affects the speed, acceleration performance, climbing performance and load capacity of new energy vehicles. Generally speaking, motors can be divided into permanent magnet synchronous motors and AC asynchronous motors. In China, permanent magnet synchronous motors with higher efficiency, stronger reliability and smaller size are widely used in new energy vehicles. At present, five motor brands in China rank among the top ten in the world. The electronic control system is the nerve center connecting the motor and the battery, which is mainly used for dynamic monitoring of the whole vehicle and timely feedback and adjustment of various technical parameters. The electronic control system mainly includes battery management system (BMS) and motor management system. BAIC New Energy owns the third-generation super electronic control technology EMD3.0 with complete intellectual property rights, which can detect the data of 260 parts of the vehicle, monitor and adjust the battery in real time, provide safety protection during the charging and discharging of the battery, automatically warn the abnormal situation and preheat it at a low charging temperature, and realize normal starting and charging at MINUS 35 degrees. The IGBT4.0 distributed by BYD last year is the core component of the motor control system. It is the core technology of new energy vehicles, and its quality directly affects the power release speed of electric vehicles: it directly controls the conversion between DC and AC, and at the same time controls the frequency conversion of AC motor, which determines the torque of the drive system (directly affects the acceleration ability of the vehicle) and the maximum output power (directly affects the maximum speed of the vehicle). BYD IGBT is known as the "Chinese core" of new energy vehicles. Its successful research and development broke the monopoly of the chip in Europe and Japan, effectively reducing the cost of building new energy vehicles and the energy consumption of the whole vehicle.