Industry definition and classification
The aluminum electrolytic capacitor is made of an aluminum cylinder as a negative electrode, which is filled with a liquid electrolyte, and a capacitor made by inserting a curved aluminum ribbon as a positive electrode.
Among the electronic components used in the entire machine, capacitors are the most widely used and the largest in terms of volume, accounting for about 40% of the total electronic components used, while aluminum electrolytic capacitors also account for three major types of capacitors (electrolytic capacitors, ceramic capacitors, and organic film capacitors). More than 30%.
Aluminum electrolytic capacitors according to different classification criteria can be divided into liquid aluminum electrolytic capacitors, solid aluminum electrolytic capacitors, consumer aluminum electrolytic capacitors. Liquid aluminum electrolytic capacitors can be divided into three types: lead type, solder lug, solder pin type, and bolt type. Consumer aluminum electrolytic capacitors are mainly used in consumer markets such as televisions, stereos, monitors, computers and air conditioners. Industrial aluminum electrolytic capacitors are mainly used in industrial and communications power supplies, professional inverters, numerical control and servo systems, wind power generation and automotive industries. field.
Industry Technology Status Analysis
1, the number of industry patent applications
Judging from the trend of changes in the total number of patent applications for aluminum electrolytic capacitors in China, before 2005, China’s patented aluminum electrolytic capacitors had a relatively small number of patent applications and the growth rate was relatively slow. Aluminum electrolytic capacitor technology was still in its infancy; after 2005, aluminum electrolytic capacitors The technology has gradually entered a stage of rapid development. The number of new patent applications each year has increased to varying degrees. In particular, in 2015-2017, the number of patent applications for aluminum electrolytic capacitors in China exceeded 200, reaching 239, respectively, 234 Items and 236 items.
Exhibit 1: Change in Number of Patent Applications for Aluminum Electrolytic Capacitors in China, 1994-2017 (Unit: Item)
Source: Forward-looking Industry Research Institute
2, the number of public patent disclosure
Judging from the trend of changes in the total number of aluminum electrolytic capacitors in China, from 1998 to 2017, the number of publicly disclosed patents related to aluminum electrolytic capacitors in China showed a fluctuating upward trend. 2016 and 2017 reached their maximum values in recent years with 268 items. As of the end of May 2018, the number of patents related to aluminum electrolytic capacitors in China has reached 181, and it is expected to exceed 300 in the year.
Note: The data for 2018 is from January to May.Note: The data for 2018 is from January to May.
Source: Forward-looking Industry Research Institute
