Analysis of an application for a patent for the lithium battery diaphragm

Source: 2020 - 04 - 04 13:37 hits: once an application for a patent for the lithium battery diaphragm 1 overview lithium ion battery diaphragm 2124 patent applications, the specific distribution is shown in figure 1. As can be seen from the figure 1, 1793 pieces of an application for a patent for invention, an application for a patent for utility model 331. Local from applicant countries to apply for a total of 1148 cases ( Of 54 cases of) And apply for a total of 976 cases of overseas. Domestic patent applications than foreign patent applications, but it is worth noting that the higher proportion of domestic patent applications, and the technical content of the patent for utility model under a patent for invention and innovation level. 2 application trend in order to understand the change trend of the number of patent applications in China, lithium-ion battery diaphragm, the total number of applications, the number of an application for a patent for invention or utility model patent application number is according to the application, the results are shown in figure 2. Patent application for invention patent applications and the sum of utility model patent applications. As can be seen from the figure 2, from 1985 to 2002, the application of lithium ion battery diaphragm quantity is less, slow growth, number of applications for dozens of year after year. From 2003 to 2011, increase so quickly. Fell from 2012 to 2013, patent applications, patents and some unpublished. An application for a patent for invention patent applications in proportion is larger, the change trend and the change tendency of the application along with the age. 2002 years ago, very little utility model patent filings, began to rapid growth until 2009. 2013 population declines in an application for a patent for utility model may also be related to the part of the application is not open. As can be seen from the figure 1, put forward an application for a patent for utility model is mainly composed of domestic applicant. The change trend of lithium ion battery diaphragm patent applications to a certain extent, reflects the development of lithium ion battery manufacturing technology, especially the growth of the domestic lithium-ion battery production scale. Early lithium ion battery is mainly used for 3 c products, the demand for lithium ion battery diaphragm is unitary, lithium-ion battery diaphragm production is mainly composed of several foreign manufacturers monopoly. The dynamic development of lithium ion battery of lithium ion battery diaphragm put forward higher requirements. Since 2002, China has gradually become the main producer of lithium-ion batteries. Domestic companies are also beginning to research and development production of lithium ion battery diaphragm, relevant patent application also increased. 3. Application of regional distribution in order to understand foreign applicants apply for lithium ion battery diaphragm to the patent situation in China, according to the country of origin of the applicant for a patent for the statistics, statistical results as shown in figure 4. As can be seen from the figure 4, most of lithium ion battery diaphragm abroad application from Et, patent application number to 570, accounting for 58% of the foreign application number. South Korea, the United States and Germany were received 176123 and 77 applications, the rest comes from France, Italy, Canada, Sweden and Britain and other countries, but not much. Domestic distribution according to the domestic applicant province ( City) Statistics, the results are shown in table 1. Can be seen from table 1, China an application for a patent for lithium ion battery of the diaphragm are mainly concentrated in guangdong, jiangsu, zhejiang, shenzhen, Beijing and tianjin. Applications of guangdong province for 410, significantly higher than other areas. In addition, shandong, fujian, henan and other 12 provinces also has an application for a patent for a certain number of lithium ion battery diaphragm, hebei, jilin and other nine provinces ( Area) Less than 10 in the number of applications.