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公开(公告)号：EP4354629A1
公开(公告)日：2024-04-17
申请号：EP22831957.0
申请日：2022-06-27
发明人： ZHANG, Xinzhi , DENG, Yaoming
IPC分类号： H01M50/451 , H01M50/457
CPC分类号： Y02E60/10
摘要： This application provides a separator and a preparation method thereof, a secondary battery, and a power-consuming device. The separator includes a base film, at least one inorganic coating, and at least one organic coating. The base film, the inorganic coating, and the organic coating are laminated. A surface on at least one side of the base film is in contact with the inorganic coating. A volume content of an organic heat-resistant resin in the organic coating is 60% to 99%. A volume fraction of inorganic particles contained in the organic coating is 1% to 40%. A lower one of a melting point or decomposition temperature of the organic heat-resistant resin is greater than or equal to 200°C. The separator with the structure can improve high temperature shrinkage performance of the separator while increasing a film rupture temperature of the separator.
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公开(公告)号：EP4246701A1
公开(公告)日：2023-09-20
申请号：EP21909148.5
申请日：2021-12-08
发明人： DENG, Yaoming , LI, Zhengjie , YANG, Dongfang , ZHANG, Xinzhi , GAO, Yunlei , XIE, Fengchao
IPC分类号： H01M50/463 , H01M50/411
摘要： This application provides a battery, including: a first base separator and a second base separator that are located on two sides of an electrode plate and that are adjacent to each other, and a first-type separator coating layer that is adhered to an edge region of the first base separator and an edge region of the second base separator. This application further provides a battery, including: a second-type separator coating layer adhered to a middle region of a base separator, and a third-type separator coating layer adhered to an edge region of a first base separator, where the second-type separator coating layer includes an adhesive polymer with a first mass content, the third-type separator coating layer includes an adhesive polymer with a second mass content, and the second mass content is greater than the first mass content. This application provides a battery, an electronic device, and a mobile apparatus, to reduce a possibility of a short circuit between a positive electrode plate and a negative electrode plate.
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公开(公告)号：EP4170809A1
公开(公告)日：2023-04-26
申请号：EP21834251.7
申请日：2021-06-28
发明人： LI, Zhengjie , DENG, Yaoming , ZHANG, Xinzhi , GAO, Yunlei , YANG, Dongfang , HONG, Da , XIE, Fengchao
IPC分类号： H01M50/494 , H01M50/46 , H01M4/13 , H01M4/66 , H01M10/052 , H01M10/054 , H01M10/058 , H01M10/42
摘要： This application provides a secondary battery, including at least one battery unit assembly. The battery cell assembly includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate and the negative electrode plate each include a current collector and an active material layer disposed on the current collector. An elongation rate of the separator is greater than 100%, the elongation rate of the separator includes an elongation rate in the length direction and/or an elongation rate in the width direction, a ratio of the elongation rate of the separator to a thickness of the active material layer of the positive electrode plate and/or negative electrode plate is 3.0%/µm to 8.0%/µm, and a ratio of the elongation rate of the separator to an elongation rate of the current collector of the positive electrode plate and/or negative electrode plate is greater than or equal to 60. In this embodiment of this application, the secondary battery may feature high safety while ensuring a high energy density. Embodiments of this application further provide a terminal including the secondary battery.
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公开(公告)号：EP4109659A1
公开(公告)日：2022-12-28
申请号：EP21765131.4
申请日：2021-03-04
发明人： ZHANG, Xinzhi , DENG, Yaoming , GAO, Yunlei , YANG, Dongfang , XU, Fan , XIE, Fengchao , LI, Zhengjie
IPC分类号： H01M50/417 , H01M50/403
摘要： Embodiments of this application provide a battery separator, including a poly olefin-based porous separator, where the polyolefin-based porous separator includes polyethylene resin, an elongation rate of the polyolefin-based porous separator in an MD direction is greater than 120%, an elongation rate in a TD direction is greater than 120%, and for the polyolefin-based porous separator, crystallinity at a first-time temperature rise of polyethylene that is measured by using a differential scanning calorimeter is less than 65%, crystallinity at a second-time temperature rise is less than 55%, and a difference between the crystallinity at the first-time temperature rise and the crystallinity at the second-time temperature rise is less than 12%. The battery separator features a high elongation rate and a low temperature of closing a pore. When a battery cell is mechanically abused, a risk of separator breakage can be reduced by implementing embodiments of this application. In addition, a separator pore can be closed in advance when the battery cell is in thermal abuse, to improve safety of the battery cell. Embodiments of this application further provide a preparation method for a battery separator, and a battery and a terminal that use the battery separator.
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