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公开(公告)号：EP3780214A1
公开(公告)日：2021-02-17
申请号：EP19784921.9
申请日：2019-03-20
发明人： YODA, Kazuyuki , KABURAGI, Tomohiro , MINEGISHI, Eiji , HATANAKA, Koh , SAKURAI, Takuya , SHIMADA, Masanori , EMORI, Yusuke , YOKOYAMA, Yuichiro
IPC分类号： H01M10/04 , H01M4/66 , H01M6/16 , H01M10/0585
摘要： [Problem] To provide means with which it is possible to improve cycle durability in a battery manufacturing method that uses electrodes containing an electrolytic solution.
[Solution] The battery manufacturing method involves: a unit cell formation step (S20) for forming a unit cell 20 in which a positive electrode obtained by a positive electrode active material layer containing an electrolytic solution disposed on a positive electrode current collector, and a negative electrode obtained by a negative electrode active material layer containing an electrolytic solution disposed on a negative electrode current collector, are stacked with a separator interposed therebetween, and in which a seal part 50 is disposed at outer peripheral portion of the unit cell; a sealing step (S30) for heat-sealing the seal part disposed at the outer peripheral portion of the unit cell; and a cooling step (S40) for cooling the outer peripheral portion of the unit cell by using a cooling medium, the cooling step being carried out after the sealing step.-
公开(公告)号：EP3780215A1
公开(公告)日：2021-02-17
申请号：EP19785619.8
申请日：2019-03-20
发明人： KABURAGI, Tomohiro , YODA, Kazuyuki , MINEGISHI, Eiji , YAMAUCHI, Noboru , EMORI, Yusuke , ISHITANI, Hideki , SHIMADA, Masanori
IPC分类号： H01M10/04 , H01M4/04 , H01M4/139 , H01M4/66 , H01M10/0585
摘要： [Problem] To provide a method for manufacturing a battery in which it is possible to reduce the internal resistance of the battery by molding a unit cell before an initial charging step.
[Solution] This method for manufacturing a battery 10 has: a unit cell formation step (S20) for forming a unit cell in which a positive electrode is obtained by a positive electrode active material layer containing an electrolytic solution being disposed on a positive electrode current collector, a negative electrode is obtained by a negative electrode active material layer containing an electrolytic solution being disposed on a negative electrode current collector, and a separator interposed between the positive electrode and the negative electrode; a surface pressing step (S40) for applying pressure by bringing a pressing surface of a pressing part into surface contact with one unit cell or with two or more stacked unit cells from the stacking direction; and an initial charging step (S50) for charging the one unit cell or the two or more stacked unit cells after performing the surface pressing step.-
公开(公告)号：EP3624243A1
公开(公告)日：2020-03-18
申请号：EP18798508.0
申请日：2018-04-26
发明人： KANO, Gentaro , ARIHARA, Kazuki , HORAI, Atsushi , MINEGISHI, Eiji , MORI, Takashi , EMORI, Yusuke , NAKASHIMA, Yusuke
摘要： [Problem] Provided is a bipolar secondary battery capable of avoiding a flow of a short-circuit current through the secondary battery via current collecting plates if an electrical conductor penetrates an exterior body.
[Solution] The bipolar secondary battery includes a power generation element 10 including unit power generation elements 14b stacked together and including bipolar electrodes 14a stacked via separators 15, and current collecting plates 16 and 17 arranged at both ends of the power generation element 10 in the stacked direction of the unit power generation elements 14b so as to be in contact with the power generation element 10, wherein the current collecting plates 16 and 17 each include an electrically conductive layer 31 and a resin film, the electrically conductive layer being formed on the resin film 30 having a thermal shrinkage percentage of 2% or greater at a temperature of 150°C, and the separators 15 have a higher thermal shrinkage start temperature than the resin films 30.-
公开(公告)号：EP3780216A1
公开(公告)日：2021-02-17
申请号：EP19786143.8
申请日：2019-03-26
发明人： KABURAGI, Tomohiro , SATOU, Hajime , YODA, Kazuyuki , WATANABE, Shigeo , MIZUNO, Yusuke , EMORI, Yusuke , SAKURAI, Takuya
IPC分类号： H01M10/04 , H01M4/04 , H01M4/13 , H01M10/0585
摘要： [Problem] To provide a method for manufacturing a battery in which the internal resistance of the battery can be reduced by molding unit cells during stacking of the unit cells.
[Solution] A method for manufacturing a battery, the method having a stacking step in which a plurality of unit cells 20 are stacked, the unit cells being obtained by stacking a positive electrode that is obtained by a positive electrode active material layer containing an electrolytic solution being disposed on a positive electrode current collector, a negative electrode that is obtained by a negative electrode active material layer containing an electrolytic solution being disposed on a negative electrode current collector, and a separator interposed between the positive electrode and the negative electrode. In the stacking step, each time one of the unit cells is stacked, the stack of the unit cells are pressed from the stacking direction.-
公开(公告)号：EP3696884A1
公开(公告)日：2020-08-19
申请号：EP18866933.7
申请日：2018-10-10
摘要： Provided is a means capable of improving the flatness of a surface of an electrode active material layer in which an electrode active material slurry without assuming addition of a binder.
Upon producing a battery electrode which has a current collector and an electrode active material layer disposed on a surface of the current collector and containing an electrode active material, in a coating step of coating an electrode active material slurry in which the electrode active material is dispersed in a solvent on the surface of the current collector to form the electrode active material layer, an electrode active material slurry which has flow characteristics that a region A in which a shear stress is not increased according to an increase in shear rate is present and a region B in which a shear stress is increased and an increase rate thereof is decreased according to an increase in shear rate is present in a region having a shear rate larger than that of the region A, in a shear rate (horizontal axis)-shear stress (vertical axis) curve of the electrode active material slurry, is used as the electrode active material slurry, and, coating of the electrode active material slurry is performed at a coating rate at which the shear rate at the time of coating is a value in which a shear stress equal to or more than a yield stress of the electrode active material slurry is applied in the coating step.
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