With the rapid development of electric vehicles, testing of high-voltage components has become increasingly critical. High-voltage components are the core components of electric vehicle power systems, mainly including battery packs, motor controllers, high-voltage cables, etc. These components are directly involved in the storage, conversion and transmission of electrical energy, and are directly related to the performance, safety and overall reliability of the vehicle. Therefore, the testing of high-voltage components of electric vehicles is particularly important. ISO 21498-2 came into being in this context.

With the rapid development of the new energy vehicle industry, the testing requirements for equipment carrying high-current circuits such as high-current cables, fuses, and contactors are becoming more and more stringent.

Background Effective January 1, 2009, the latest version of the Technical Instructions for the Safe Transport of Dangerous Goods by Air issued by the International Civil Aviation Organization (ICAO) added UN serial numbers for dangerous goods, and lithium batteries will be classified as lithium-ion batteries (UN 3090 and UN 3091) and lithium metal batteries (UN 3480 and UN 3481). The regulation states that lithium batteries cannot be transported by air if they do not come with a test report or certificate of approval based on UN38.3.

At present, the global photovoltaic industry is still in full swing. Technological advancements such as improving power generation efficiency and reducing power generation costs have become new industry drivers and development directions. The study of photovoltaic output characteristics under complex conditions plays a decisive role in improving power generation efficiency.

Guide Autonomous driving technology makes the central control display become the core interaction point of the vehicle, and the driver can almost complete all operations except vehicle driving through a single display. Since 2022, a number of cars equipped with Mini-LED screens have been released, including NIO ET7 and ES series, Cadillac LYRIQ, Ideal L9, etc. Benefiting from Chinese and American automakers, the shipment of Mini-LED displays for vehicles will be about 140,000 pieces in 2022. It is expected that Mini-LED displays will explode in the field of automotive displays in 2023, and the shipment volume is expected to reach 450,000 pieces. As Mini-LED displays have gradually matured, it is expected that more car manufacturers will adopt Mini-LED backlight displays in 2024, and the shipment volume is expected to reach nearly 1 million units.

Many important parameters of electronic devices are closely related to the resistivity and the uniformity of its distribution, such as the reverse saturation current of the diode, the saturation voltage drop of the transistor and the magnification β, etc., which are directly related to the resistivity of silicon single crystal. Therefore, the resistivity test of devices has become an important process in chip processing, and its uniformity control and accurate measurement are directly related to whether power devices with better performance can be manufactured in the future.