Looking Forward: New Opportunities and Development Directions Facing the Development of Capacitors

my country is the world's largest producer and exporter of capacitors, as well as a major consumer of capacitors. In the 'Twelfth Five-Year' development plan of the capacitor industry announced a few days ago, it is clearly pointed out that the development focus of capacitors during the 'Twelfth Five-Year' period is: new energy supporting capacitors, power inverter capacitors, power variable frequency capacitors, and automotive electronics supporting capacitors. . It can be said that emerging industries such as energy conservation and environmental protection, information technology, new energy, new materials and new energy vehicles have brought new opportunities for the development of capacitors. Domestic capacitor companies should be more forward-looking. At present, global capacitor production capacity is mainly concentrated in Japan, Taiwan and China. Compared with the former two, although the domestic production capacity of capacitors is large, most of them are low-end products. Therefore, Pan Danan, secretary-general of the Capacitor Branch of the China Electronic Components Industry Association, pointed out: “Domestic capacitor companies should adapt to market changes, pay close attention to forward-looking industries, and continuously introduce products that meet the requirements of different complete machines in order to become bigger and stronger. Current capacitor manufacturers should Pay attention to the development of solar photovoltaic, wind power, tidal power, energy-saving lamps, electric vehicles, hybrid vehicles, automotive electronics, subway, high-speed rail, DC transmission and transformation, triple play, high-definition TV, set-top box, mobile TV and other industries.' The advantages of aluminum electrolytic capacitors are still huge. Capacitors account for about 40% of the electronic components of the whole machine, while aluminum electrolytic capacitors account for 34% of the entire capacitor output. Aluminum electrolytic capacitors account for 44% of consumer electronics applications due to their wide range of voltage and capacitance, large power storage, and low price. They are mainly used in household appliances such as computers, color TVs, air conditioners, cameras, and CNC lathes. With the continuous improvement of aluminum electrolytic capacitor technology and the continuous enrichment of product structure, in recent years, it has been widely used in automotive electronics, new energy, aerospace and military industries, and is mainly used to manufacture energy-saving lamps, frequency converters, inverters, uninterruptible power supplies, etc. , This will make aluminum electrolytic capacitors in the entire capacitor market share is expected to further increase. High frequency, low impedance, long life, wide temperature, ultra-small size, etc. will be the development direction of aluminum electrolytic capacitors. Film capacitors take advantage of the trend. Compared with aluminum electrolytic capacitors, film capacitors have the advantages of good reliability, stable performance, and large capacity, and are more suitable for harsh outdoor natural environments. Especially in the fields of new energy vehicles, wind power generation, solar power generation, high-speed rail and light rail trains, and high-voltage inverters, film capacitors have become the first choice due to their advantages in life, temperature and voltage. It is understood that the international wind power giant Vestas and other manufacturers have already begun to use film capacitors, and Toyota's new energy vehicle Prius second-generation film capacitors replaced aluminum electrolytic capacitors. In China, aluminum electrolytic capacitor giant Jianghai also invested 200 million yuan to build 10 high-voltage film capacitor production lines to form an annual output of 1 million high-voltage large-capacity film capacitors, which is also a preparation for the future of film capacitors for new energy vehicles. As the world's top five film capacitor manufacturers, Farah Electronics is also vigorously expanding the frequency conversion home appliances and new energy markets. The AC film capacitors produced by the company can be used in multiple fields of new energy: hybrid vehicles, wind power, solar energy, etc. However, the shortcomings of large size and high price of film capacitors also have a great impact on the market share. In order to meet the needs of new industries, high frequency, large capacity, high current, low impedance, high voltage, and high dv/dt characteristics will be the development direction of film capacitors.

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