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Phased evolution of the patent cooperation network: From 2008 to 2021, the evolution of the new energy vehicle power battery patent cooperation network presents significant phased characteristics, which not only reflect the rapid development of technology but also reflect the deepening of the industry-university-research cooperation mode.
The number of collaborative patent applications for new energy vehicle power batteries increased from 4 in 2008 to 72 in 2011, indicating a consistent trend of growth. During the initial phase of patent collaboration, the level of cooperation was minimal, with only 4 patents filed annually, reflecting an early stage of innovation.
Given the core and innovation of new energy vehicle battery technology, patent application, and authorization have become an important driving force to promote technological progress and industrial development.
New energy power battery technology is a highly patent-intensive field, and patent protection and cooperation are crucial to the development and application of the technology. Patents are the result of technological innovation and an important indicator of technological innovation behavior (Archibugi 1992).
From the point of view of the existing research, scholars on the pure electric vehicle power battery industry patent analysis mainly focuses on the number of patents, patent layout, and patent technology focuses on the direction, more inclined to the study of data facts.
4. The analysis of overall trend of R&D in EVs battery technology From CNIPR retrieval platform, we got 2061 patents totally from Jan.1992 to Jun.2016, among them, the number of the invention patent is 1219, accounting for 59%; utility model is 803 (39%); appearance design is 40 (2%).
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Power battery is the key to the widespread use of pure electric vehicles. In this paper, patent mining and data analysis technology are adopted to summarize the development …
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