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公开(公告)号：EP4317340A1
公开(公告)日：2024-02-07
申请号：EP22938732.9
申请日：2022-04-26
发明人： WANG, Long , LIU, Huihui , HUANG, Siying , WANG, Yaohui
摘要： The present disclosure discloses an adhesive tape for an electrode tab, which includes a base-material layer and an adhesive layer. The adhesive layer includes a thick region and a thin region which extend from a side edge of the adhesive tape in a width direction of the adhesive layer, the thick region is distributed along the side edge of the adhesive tape, and an adhesive layer thickness of the thick region is greater than an adhesive layer thickness of the thin region. A ratio of an area of the thin region to an area of the thick region is 1: 0.02-0.25, optionally 1: 0.025-0.18, and further optionally 1: 0.0275-0.125. The adhesive tape covers an edge of the tab to fundamentally prevent contact between the tab and a battery cell body, and it can be satisfied that a top cover does not interfere when a battery cell enters a housing, thereby improving safety performance of the secondary battery.
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公开(公告)号：EP4280309A1
公开(公告)日：2023-11-22
申请号：EP22919266.1
申请日：2022-03-31
发明人： LIU, Huihui , FENG, Lingyun , FAN, Yanhuang , DUAN, Lianwei
IPC分类号： H01M4/58 , H01M4/62 , H01M10/0525
摘要： The present application provides a positive electrode plate, a secondary battery, and a power consuming device. The positive electrode plate comprises a positive electrode current collector, a positive electrode film layer arranged on at least one surface of the positive electrode current collector, and a conductive undercoat layer positioned between the positive electrode current collector and the positive electrode film layer, wherein the positive electrode film layer comprises the positive electrode film layer comprises a positive electrode active material having a core-shell structure, with the positive electrode active material comprising an inner core and a shell coating the inner core, wherein the shell comprises a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer; and the conductive undercoat layer comprises a first polymer, a first aqueous binder, and a first conductive agent.
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公开(公告)号：EP4421140A1
公开(公告)日：2024-08-28
申请号：EP23822772.2
申请日：2023-04-14
发明人： LI, Cheng , ZENG, Zipeng , LIU, Huihui , WANG, Jingming
IPC分类号： C09J127/14 , C08F114/22 , C08F14/22 , C08F214/22
CPC分类号： C08F214/22 , C08F14/22 , C08F114/22 , C09J127/14
摘要： This application provides a binder composition. The binder composition includes a first fluoropolymer and a second fluoropolymer, where the first fluoropolymer includes polyvinylidene fluoride with a weight-average molecular weight of 5000000-9000000, and a weight-average molecular weight of the second fluoropolymer is not greater than 600000. Featuring good processability, this binder composition, even added in small amounts, can provide electrode plates with great adhesion force and improve the cycling performance of a battery.
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4.发明公开
公开(公告)号：EP4379839A1
公开(公告)日：2024-06-05
申请号：EP22945302.2
申请日：2022-06-09
发明人： LI, Cheng , LIU, Huihui
CPC分类号： H01M4/13 , H01M4/62 , H01M4/663 , H01M4/136 , H01M4/5825 , H01M2004/02820130101 , H01M4/668 , H01M4/622 , H01M2004/02120130101 , H01M4/667 , H01M4/131 , H01M4/625 , H01M4/525 , H01M4/139 , H01M10/0525 , Y02E60/10
摘要： The present application provides a positive electrode plate, a secondary battery, a battery module, a battery pack and a power consuming device. The positive electrode plate comprises a current collector, a primer coating layer provided on at least one surface of the current collector, and a positive electrode film provided on the primer coating layer, wherein the primer coating layer contains a polymer A soluble in an aqueous solvent, and the polymer A comprises a structural unit derived from a monomer containing a cyano group, a structural unit derived from a monomer containing an amide group, and a structure unit derived from a monomer containing an ester group. In the present application, the polymer A is used in the primer coating layer of the positive electrode plate, which increases the molding quality, adhesive force and flexibility of the positive electrode plate, and optimizes the cycling performance of the battery.
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5.发明公开
公开(公告)号：EP4329015A1
公开(公告)日：2024-02-28
申请号：EP22941866.0
申请日：2022-05-31
发明人： LI, Cheng , LIU, Huihui , DUAN, Lianwei
IPC分类号： H01M4/62 , H01M4/13 , H01M10/0525
摘要： The present application provides a binder, a preparation method therefor, a secondary battery, a battery module, a battery pack, and a power consuming device. The binder comprises a polymer comprising structural units derived from a monomer represented by formula I and structural units derived from a monomer represented by formula II, wherein R 1 and R 2 are each independently selected from hydrogen or substituted or unsubstituted C 1-5 alkyl, R 3 is selected from hydrogen or methyl, and R 4 is selected from substituted or unsubstituted C 1-9 alkyl. The binder can be coated on the surface of the positive electrode active material, which is beneficial to maintain the structural integrity of the positive electrode active material during the cycling of the positive electrode plate, thereby improving the cycling performance of the battery. Moreover, the binder can produce a stronger binding effect, which allows the electrode plate to have a greater binding force and can reduce the internal resistance of the electrode plate.
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公开(公告)号：EP4280308A1
公开(公告)日：2023-11-22
申请号：EP22917641.7
申请日：2022-03-31
发明人： LIU, Huihui , FENG, Lingyun , FAN, Yanhuang , ZHANG, Wenmeng
IPC分类号： H01M4/58 , H01M4/62 , H01M10/0525
摘要： The present application provides a positive electrode plate, a secondary battery and a power consuming device. The positive electrode plate comprises a positive electrode current collector, a positive electrode film layer provided on at least one surface of the positive electrode current collector, and a conductive undercoat layer between the positive electrode current collector and the positive electrode film layer, wherein the positive electrode film layer includes a positive electrode film layer comprising a positive electrode active material with a core-shell structure, the positive electrode active material comprises an inner core and a shell coating the inner core, and the conductive primer layer comprises a first polymer, a first water-based binder and a first conductive agent.
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7.发明公开
公开(公告)号：EP4064405A1
公开(公告)日：2022-09-28
申请号：EP21806929.2
申请日：2021-02-04
发明人： WU, Kai , LIU, Huihui , LI, Zhonghong , WANG, Long , ZHENG, Tuo , CHE, Huan
IPC分类号： H01M10/0525 , H01M10/0587 , H01M10/0583 , H01M4/62 , H01M4/02
摘要： An embodiment of the present application provide an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing equipment and method, which belong to the technical field of batteries. Among that, the electrode assembly includes a negative electrode plate and a positive electrode plate, and the negative electrode plate and the positive electrode plate form a bending region by winding or folding. The positive electrode plate includes a plurality of bending portions located in the bending region, the bending portion includes a positive electrode current collecting layer and a positive active substance layer, and at least one side surface of the positive electrode current collecting layer is provided with the positive active substance layer in a thickness direction of the positive electrode plate. At least one positive active substance layer is provided with the barrier layer, at least a part of the barrier layer is intercalated in the positive active substance layer provided with the barrier layer, and coats at least a part of particles in the positive active substance layer, to prevent the particles from releasing an ion to the negative electrode plate. The arrangement of the barrier layer can effectively reduce the occurrence of the lithium plating phenomenon, improve the safety of the battery cell, and increase the service life of the battery cell.
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公开(公告)号：EP4358193A1
公开(公告)日：2024-04-24
申请号：EP22950447.7
申请日：2022-08-09
发明人： WANG, Xinghui , LIU, Huihui , ZHANG, Wenmeng , CHEN, Shuhua
IPC分类号： H01M4/62
摘要： The present application provides a negative electrode plate, comprising a current collector and a negative electrode film layer, wherein the negative electrode film layer comprises a negative electrode active material, a copolymer formed by acrylonitrile and acrylic acid components, and a polyol. Optionally, the negative electrode film layer further comprises a polyether. The cross-linked polymer and polyether described in the present application can reduce the rebound rate of the negative electrode plate during cycling, thereby improving the capacity retention rate of the battery.
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9.发明公开
公开(公告)号：EP4354554A1
公开(公告)日：2024-04-17
申请号：EP22949684.9
申请日：2022-08-05
发明人： LI, Cheng , ZENG, Zipeng , LIU, Huihui
IPC分类号： H01M4/62
摘要： The present application provides a conductive binder, the conductive binder is formed by reacting polyimide with a conductive agent, and the conductive binder comprises a structural unit represented by formula I containing trifluoromethyl,
wherein, R1 and R2 are each independently selected from substituted C6-C25 aromatic groups. For the conductive binder, in the case of a low content of conductive agent and a low amount of conductive binder added, it can greatly reduce the membrane resistance, improve the adhesion of the electrode plate and the cycling capacity retention rate of the battery, and reduce the internal resistance increase rate of the battery in the cycling process.-
10.发明公开
公开(公告)号：EP4318678A1
公开(公告)日：2024-02-07
申请号：EP22937664.5
申请日：2022-06-09
发明人： LI, Cheng , LIU, Huihui
摘要： The present application provides a positive electrode slurry, a secondary battery, a battery module, a battery pack and a power consuming device. The positive electrode slurry comprises a positive electrode active substance, a conductive agent and a binder, wherein the binder comprises a polymer A, and the polymer A comprises a structural unit derived from a monomer containing a cyano group, a structural unit derived from a monomer containing an amide group, and a structure unit derived from a monomer containing an ester group. In the present invention, the polymer A is used as the binder of the positive electrode slurry, such that the stability and processability of the positive electrode slurry are improved, and the adhesive force of the positive electrode plate is increased.
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