Analysis of Research and Development Trend of the Battery Technology in Electric Vehicle with the Perspective of Patent

With the continuous decreasing of oil resources and the growing of tail gas pollution, more and more countries began to attach importance to the new energy vehicles, especially the application of electric vehicles (EVs). Battery technology is one of the key technologies of electric vehicle (EV) development, which the advancement and maturity influence the industrialization of EVs directly. Based on the data of the patent application on the EVs battery technology, this paper intends to analyze from the overall trend of the patent, distribution of the patent type, multidisciplinary technology system, and the cooperation of research and development (R&D), etc. Then results show that the main future trend is the lithium ion battery; the breakthrough of this area relies on the integration of interdisciplinary and multidisciplinary; and it is necessary to strengthen the R&D cooperation with the policy support of the government. (C) 2017 The Authors. Published by Elsevier Ltd.