Application of Amorphous and Nanocrystalline Alloys in New Energy Vehicles

Application of Amorphous and Nanocrystalline Alloys in New Energy Vehicles

The development of new energy vehicles brings challenges and opportunities to amorphous magnetic materials and devices

With the development of the automobile industry in the direction of new energy and intelligence, electric drive has become the main driving method of new energy vehicles compared with the traditional mechanical drive mode. Therefore, the challenge for the development of new energy vehicles lies in the "three-electric system". Namely battery, electric drive and electric control. In the three-electric system, a large number of magnetic materials and devices are involved, such as: battery monitoring, measurement and protection in the battery management system. Magnetic materials directly affect the monitoring and measurement accuracy; motors and inverters in the electric drive system, magnetic The performance of materials directly determines the performance and efficiency of new energy vehicles; electronic control systems involve magnetic materials and devices that require multiple functions such as filtering, energy storage, voltage transformation, and measurement. The dynamic performance of magnetic materials is very important.

The development of new energy vehicles puts forward higher requirements and challenges for magnetic materials and devices, and also provides development opportunities for the development of magnetic materials and devices. The difference of new energy vehicles lies in the competition of electric energy utilization efficiency. In order to improve the conversion and utilization efficiency of electric energy, on the one hand, it is necessary to improve the performance of the motor to achieve high energy density, high frequency and low loss. The material requirement is high saturation magnetic Induction and low loss at high frequencies. On the other hand, high-frequency technology is used in circuit design to achieve the design goals of high efficiency and miniaturization. The main role of magnetic devices in the circuit is to achieve filtering, energy storage, voltage transformation, measurement and anti-interference functions. The requirements are good broadband characteristics to meet the needs of electric drive high and low frequency; low loss to extend the cruising range; high Curie temperature to improve temperature stability; common mode high impedance characteristics to meet the demanding EMC requirements of high frequency and intelligent .

Amorphous and nanocrystalline alloys are currently the most ideal soft magnetic materials for electric vehicles

Due to their special structure and excellent comprehensive soft magnetic properties, amorphous and nanocrystalline materials are mainly used to manufacture various medium and high frequency transformers, high-performance inductors and filters, high-precision electromagnetic measurement and sensors, and high-performance electromagnetic shielding and absorption. Wave materials, etc. A large number of magnetic devices are used in the electric drive system, electric control system and charging system of electric vehicles. Amorphous and nanocrystalline alloys are currently the most ideal soft magnetic materials. These soft magnetic materials can provide products such as high-frequency filter inductors, reactors and PFCs for electronic control units for new energy vehicles, as well as EMC overall solutions for charging systems. Energy-saving and efficient amorphous motors made of amorphous materials are particularly suitable Used in new energy vehicles, it has outstanding advantages such as low current start and output high torque, no torque attenuation at high speed, and high speed energy saving.

In addition, amorphous and nanocrystalline are widely used in power transmission and distribution, electric power, industrial power, new energy, consumer electronics, aerospace, rail transit and other fields.

The development trend is to manufacture ultra-wide and ultra-thick amorphous ribbons and ultra-wide and ultra-thin nanocrystalline ribbons respectively

Amorphous and nanocrystalline alloys use advanced rapid solidification technology to form a thin strip with a thickness of 20-30 microns from molten steel in one step, which represents the shortest flow of metallurgical processes. Because amorphous and nanocrystalline alloys have unique organizational structures, efficient preparation processes, and excellent material properties, they fully reflect the dual energy-saving characteristics of manufacturing and use. Therefore, in the power industry, power electronics industry, electronic information industry, and There are broad applications in strategic emerging industries such as photovoltaics, wind power and electric vehicles.

The development trend of high efficiency, energy saving and miniaturization in high-end applications and emerging fields has put forward higher requirements for amorphous and nanocrystalline materials and devices. To meet these requirements and future development, the development trend of amorphous and nanocrystalline basic materials is Manufacture ultra-wide and ultra-thick amorphous ribbons and ultra-wide and ultra-thin nanocrystalline ribbons respectively. The development trend of amorphous and nanocrystalline material performance is to further improve the saturation magnetic induction, reduce material loss, and achieve high performance and high use of materials. Efficiency and low emissions from the production process.

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