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Application and status of silicon carbide in emerging energy field

2018-09-12PV26

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I. application of silicon carbide in the field of electric vehicles

Silicon carbide, as an advanced electronic material that is the core of ev charging module and electric module in the future, can realize the energy supply, low-carbon, intelligent and sustainable development of green travel, and finally seize the commanding height of future industrial development.The improvement of the charging module performance of silicon carbide devices is mainly reflected in three aspects :(1) improve the frequency and simplify the power supply network;(2) reduce loss and temperature rise.(3) reduce the volume and improve the efficiency.

2.Application of silicon carbide in new type power transmission system

Silicon carbide base power switch due to open state with very low resistance, and can be applied to high pressure, high temperature, high frequency occasions, is an ideal replacement for silicon devices, if the use of silicon carbide power module, compared with the use of silicon power supply unit, power loss caused by the switch loss can reduce more than 5 times, grid form and in the future energy strategy adjustment will have a significant impact, its size and weight reduce above 40%.Silicon carbide device scale is applied to solid state circuit breaker, converter valve, active filter and other existing equipment to provide the support of core components and key equipment for realizing smart power grid and accelerating China's energy strategic transformation.

3.The application of silicon carbide materials in solar energy and other fields

Silicon carbide power devices are designed for applications such as solar inverters, uninterruptible power supply devices, and high-power module components such as wind power motor drivers to be smaller, lower material costs and higher efficiency.The typical conversion efficiency of the new standard solar silicon-based inverter is close to 96%, while the average efficiency of the silicon carbide inverter can be improved to 97.5%, equivalent to reducing the loss of the inverter by 25%. The silicon carbide inverter can increase the conversion efficiency by 20% in the field of wind power generation.

4.The application of silicon carbide in LED lighting

The technology and application of third-generation semiconductor materials such as silicon carbide and gallium nitride are becoming a new strategic high ground in the global semiconductor industry.Silicon carbide LED lighting equipment can reduce the number of original LED lights by 1/3, reduce the cost by 40-50%, but increase the brightness by twice, and improve the thermal conductivity by more than 10 times.LED lighting is the development direction of the future lighting field. In daily life, people can see all kinds of lights, car lighting, information screen, color display equipment, and white light lighting now use silicon carbide LED semiconductor lighting, which can achieve higher efficiency of electro-optical conversion, and achieve the goal of greatly reducing cost and pollution.

5.Application of silicon carbide in new reactor fuel rods

The energy generated by nuclear power plants comes from the fuel element, and the radioactive fission products generated by nuclear fission mainly stay inside the fuel element. Therefore, the fuel element is the core part of the reactor, directly affecting the economy and safety of the nuclear reactor.Silicon carbide as important cladding and substrate material of all kinds of novel structure, function complete fuel element model has been designed, the silicon carbide cladding high temperature gas-cooled reactor fuel element has started the commercialisation, other containing silicon carbide materials for the development of fuel element will also speed up the pace, in addition to fuel, silicon carbide materials in the reactor structural materials, in pile pipe lining, etc, also have broad application prospects.It can be predicted that with the continuous improvement of nuclear safety requirements, silicon carbide will be more widely used and play a more important role in the field of nuclear energy.