Chan Ye Xin Xi Wang·2025-05-16 01:36Core Viewpoint - The diaphragm is a critical component in power batteries, essential for preventing short circuits and overheating, and the industry is poised for significant growth driven by the global push for carbon neutrality and supportive government policies [1][18]. Industry Overview - The power battery diaphragm is a porous film that separates the positive and negative electrodes in batteries, preventing short circuits and facilitating lithium-ion migration. It is categorized into dry-process and wet-process diaphragms based on production methods [3][4]. - The global lithium battery diaphragm market is expected to see a substantial increase, with China's diaphragm shipment volume projected to grow by 28.60% year-on-year in 2024, reaching 22.75 billion square meters [1][21]. Industry Policies - The Chinese government has implemented various supportive policies to foster the development of the new energy vehicle industry, which in turn boosts the diaphragm sector. Key policies include enhancing battery safety standards and promoting the integration of new energy vehicles with the power grid [5][6]. - Local governments, such as those in Guizhou and Chongqing, have also introduced initiatives to support the diaphragm production and technology advancements [5][7]. Industry Development History - The Chinese diaphragm industry began in the early 2000s, with significant advancements in technology and production capacity occurring after 2010. By 2014, Chinese manufacturers started supplying major automotive companies, marking a shift towards global competitiveness [8][17]. Industry Chain - The diaphragm industry chain includes upstream raw materials like polyethylene and polypropylene, with domestic production increasingly meeting the needs of diaphragm manufacturers. The midstream involves diaphragm production, while the downstream consists of battery manufacturers [10][12]. Market Dynamics - The competition in the diaphragm industry is intensifying, with major players expanding capacity and facing price competition. Key companies include Enjie, Cangzhou Mingzhu, and Xingyuan Materials, with wet-process diaphragms gaining a larger market share [23][25]. Future Trends - The industry is moving towards high-performance materials and technological upgrades, focusing on thinner and higher porosity diaphragms. There is also a trend towards vertical integration and regional industrial clusters to enhance supply chain security [29][30]. - Companies are increasingly looking to expand globally and participate in standard-setting to enhance their competitive edge in international markets [31][32].