Towards carbon neutrality, silicon carbide becomes the big shovel to dig the new energy industry?(2)

Towards carbon neutrality, silicon carbide becomes the big shovel to dig the new energy industry?(2)

2022-05-24 13:35:37 4

Charging Pile


New energy vehicles have various needs for electrical energy conversion, and the use of silicon carbide devices can significantly reduce the size of the equipment and significantly reduce losses. Therefore, whether applied to new energy vehicle charging piles, electronic control modules or vehicle charging modules, silicon carbide technology can bring greater advantages.


For electric vehicle charging piles, among the many charging pile solutions, the DC fast charging mode is now the most interesting to consumers. However, DC fast charging mode requires very high charging power and very high charging efficiency, which can be achieved by high voltage. In the application of electric vehicle charging pile, silicon carbide either in Boost, or output diode, there are many silicon carbide MOSFET electric vehicle charging pile solutions using the main switch, its application prospects are very broad.


New transmission systems

Silicon-based power electronic transformers have been partially realized in the field of low-power grids, but due to their high losses and large size, they cannot yet be applied in the field of high-voltage and high-power power transmission. At present, the maximum breakdown voltage of commercial silicon-based insulated gate bipolar transistors (IGBTs) is 6.5 k V. All silicon-based devices cannot operate normally above 200°C, which largely reduces the efficiency of power devices. The third generation of power devices based on wide-band semiconductor materials can solve these problems well, with silicon carbide power devices with turn-off voltages of up to 200 k V and operating temperatures of up to 600°C.


Based on silicon carbide power electronics technology will have higher transmission voltage, transmission capacity, to meet the global energy Internet of ultra-high voltage, ultra-long distance transmission major needs.


LED lighting

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The core materials of LED optoelectronic devices, such as silicon carbide and gallium nitride, are becoming the third-generation semiconductor materials technology and application of the global semiconductor industry's new strategic high ground. Silicon carbide LED lighting devices can reduce the number of the original LED lights by 1/3, the cost by 40 to 50%, while the brightness is increased twice, and the thermal conductivity is increased by more than 10 times. According to the U.S. Department of Energy analysis, the U.S. widely used LED lighting technology, the United States can build 133 less coal-fired power plants, while reducing 258 million t greenhouse gas emissions, the savings in electricity can supply 12 million U.S. households for a year. China and the United States are the top two countries in the world in terms of energy consumption, if China popularizes the silicon carbide based LED lighting technology, it is of great significance to reduce the consumption of coal and CO2 emissions in China.


Summary

In view of the excellent characteristics of silicon carbide materials, it is expected to become the most important third-generation semiconductor materials, and will fully replace the current widely used silicon semiconductor materials in the future, its application areas are more extensive, the potential market is larger, related to the long-term development of the national economy and strategic security. With the promotion of new energy vehicles and the upgrading of power grids in China, silicon carbide materials will be used in green energy, electric vehicle charging piles, improving the energy efficiency of electric vehicles, smart grid construction and other aspects of large-scale applications, which will directly affect the promotion of China's "carbon peak, carbon neutral" work.



Reference sources

[1] Liu Ke, Academician. Carbon Neutral Misconceptions and Their Realistic Paths

[2] Zhao Min et al. Application and prospect of silicon carbide in energy field

[3] Sheng. The application of silicon carbide materials in charging piles should be increased

[4] Ding XW, Li ZJ. Study on the application of silicon carbide devices in DC charging piles

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