At present, the global supply market of aluminium electrolytic capacitors is becoming more and more mature, mainly concentrated in Japan, mainland China, Taiwan and South Korea. From the overall competition pattern of the industry in recent years, the production of electrolytic capacitors in Japan began to shrink gradually, replaced by Korean enterprises, Taiwan enterprises and Chinese enterprises. Aluminum electrolytic capacitor was considered as a high-tech product in mainland China before 1978. After more than 30 years of development, it is no longer a high-tech product for domestic manufacturers of aluminium electrolytic capacitors. From a technical point of view, the capacitors produced by some well-known brands in China can completely replace the capacitors produced abroad.

The basic functions of aluminium electrolytic capacitors in electronic circuits are generally summarized as: AC, DC resistance, filtering, bypass, coupling and fast charging and discharging functions, and has the characteristics of small size, large storage capacity and high cost performance. With the progress of modern science and technology and the continuous improvement of capacitor performance, aluminium electrolytic capacitors have been widely used in consumer electronics products, communications products, computers and peripheral products, new energy, automatic control, automotive industry, photoelectric products, high-speed railway and aviation and military equipment. Aluminum electrolytic capacitors can be divided into liquid aluminium electrolytic capacitors and solid aluminium electrolytic capacitors according to the electrolyte morphology; according to the different ways of extraction, they can be divided into five types: lead type, needle type, solder plate type, bolt type and patch type.

Aluminum electrolytic capacitors can be divided into consumption type, industry type and special application type according to their application fields. Consumption type of aluminium electrolytic capacitors are mainly used in energy-saving lighting, TV sets, displays, computers and air conditioning and other consumer markets. Industrial type of aluminium electrolytic capacitors are mainly used in industrial and communication power supply, professional frequency converters, numerical control and servo systems, wind power generation and automobiles. Special aluminum electrolytic capacitors are mainly used in military, aerospace and other special fields.