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公开(公告)号：US20240304945A1
公开(公告)日：2024-09-12
申请号：US18658920
申请日：2024-05-08
发明人： Yanyun Ma , Haiyi Hong , Xiaonan Cheng , Peng Wang , Lei Chao , Jianrui Yang , Yi Zheng , Chengdong Sun
IPC分类号： H01M50/446 , H01M50/42 , H01M50/434
CPC分类号： H01M50/446 , H01M50/42 , H01M50/434
摘要： This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The coating is formed on at least part of a surface of the substrate, the coating includes composite particles, first inorganic particles, and a binder, the composite particles form bulges on a surface of the coating, the composite particles include polyacrylate particles and ion-conducting particles, and the ion-conducting particle is present between at least two polyacrylate particles. A mass ratio of the first inorganic particles to the ion-conducting particles is 1:0.007-0.06.
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公开(公告)号：US20240339616A1
公开(公告)日：2024-10-10
申请号：US18619209
申请日：2024-03-28
发明人： Lei Li , Haiyang Kang , Yi Zheng , Meihuang Chen , Chengdong Sun
CPC分类号： H01M4/622 , H01M2004/021
摘要： The present application relates to the technical field of secondary batteries, and in particular to a binder for secondary batteries and a preparation method thereof, a separator comprising the binder, a battery cell, a battery and an electrical apparatus. The binder for secondary batteries includes an organic polymer. The organic polymer has a first glass transition temperature and a second glass transition temperature, the first glass transition temperature is less than or equal to 25° C., and the second glass transition temperature is greater than 25° C. During coating of a separator, the binder is non-viscous at room temperature to facilitate winding and unwinding of the separator. However, the binder has a better bonding force when a cold pressing process is carried out after the winding with positive and negative electrode plates, so that the positive and negative electrode plates and the separator fit each other closely.
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3.发明公开公开(公告)号：US20240222795A1
公开(公告)日：2024-07-04
申请号：US18592536
申请日：2024-03-01
发明人： Haiyi Hong , Lei Li , Xiaonan Cheng , Jianrui Yang , Peng Wang , Yi Zheng , Chengdong Sun
IPC分类号： H01M50/451 , H01M50/42 , H01M50/426 , H01M50/46
CPC分类号： H01M50/451 , H01M50/42 , H01M50/426 , H01M50/46
摘要： This application relates to the field of battery technologies, and in particular, to a binder and a preparation method thereof, and a separator, electrode assembly, battery cell, battery, and electric apparatus containing such binder. The binder includes a core layer structure and a shell layer structure provided on surface of the core layer structure, where the core layer structure includes a polyvinylidene fluoride polymer, and the shell layer structure includes a polyacrylate polymer. Polyvinylidene fluoride is a homopolymer with a crystallinity of about 50%, resulting in insufficient adhesion force. Therefore, in this application, the polyacrylate polymer is used to encapsulate the polyvinylidene fluoride polymer to obtain a core-shell-structured binder, so that the crystallinity of the polyvinylidene fluoride polymer in the core-shell-structured binder is improved, and adhesion performance of the core-shell-structured binder is improved, thereby increasing adhesion force between a separator and an electrode plate via the binder.
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4.发明公开公开(公告)号：US20240145864A1
公开(公告)日：2024-05-02
申请号：US18409818
申请日：2024-01-11
发明人： Haiyang Kang , Yi Zheng , Chengdong Sun , Yang Yu , Chuying Ouyang
IPC分类号： H01M50/446 , C08F220/28 , C08K3/22 , C08K3/30 , C08K3/36 , C08K5/098 , H01M50/423 , H01M50/431
CPC分类号： H01M50/446 , C08F220/281 , C08K3/22 , C08K3/30 , C08K3/36 , C08K5/098 , H01M50/423 , H01M50/431 , C08F2800/20 , C08K2003/2227 , C08K2003/3045 , H01M2220/20
摘要： This application provides a binder and a separator containing same, an electrode plate, and a related secondary battery, a battery module, a battery pack, and an electrical device. The binder includes an organic polymer and an inorganic compound. The organic polymer is polymerized from a first polymerizing monomer containing an ester bond, a second polymerizing monomer containing a nitrile bond, and a third polymerizing monomer containing an amide bond. A weight ratio between the first polymerizing monomer, the second polymerizing monomer, and the third polymerizing monomer is 1:(0 to 0.8):(0 to 0.15), and optionally 1:(0.05 to 0.2):(0.05 to 0.1). When the binder is applied to the separator, the resistance of the separator is reduced, the ionic conductivity of the separator is improved, and the battery performance is improved.
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公开(公告)号：US20240313352A1
公开(公告)日：2024-09-19
申请号：US18657806
申请日：2024-05-08
发明人： Xiaonan Cheng , Haiyi Hong , Yanyun Ma , Jianrui Yang , Yi Zheng , Chengdong Sun
IPC分类号： H01M50/451 , H01M50/403 , H01M50/42 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/489
CPC分类号： H01M50/451 , H01M50/403 , H01M50/42 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/489 , H01M2220/20
摘要： This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The separator includes a substrate and a pressure-sensitive coating, where the pressure-sensitive coating is formed on at least a portion of surface of the substrate. The pressure-sensitive coating includes composite particles and a first plasticizer. The composite particles form bulges on surface of the coating, and the composite particles include polyacrylate particles and inorganic particles. The inorganic particle is present between at least two of the polyacrylate particles, and solubility parameter of the first plasticizer and solubility parameter of the composite particles have a difference with an absolute value of 0.3 MPa1/2-4 MPa1/2.
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公开(公告)号：US20240304819A1
公开(公告)日：2024-09-12
申请号：US18664259
申请日：2024-05-14
发明人： Xiaonan Cheng , Haiyi Hong , Lei Li , Jianrui Yang , Peng Wang , Yi Zheng , Chengdong Sun
CPC分类号： H01M4/622 , H01M50/42 , H01M2004/021
摘要： This application discloses a binder and a preparation method thereof, a separator, an electrode plate, an electrode assembly, a battery cell, a battery, and an electric apparatus, and relates to the field of battery technologies. The binder includes a coating layer and a core disposed in the coating layer, where the coating layer includes a polyacrylate copolymer, and the core includes ceramic. The binder is applied onto the separator and used in the battery, providing strong adhesion. This enhances the pre-cold pressing adhesion force and hardness of the battery cell, and reduces electrochemical impedance, thus improving the cycling performance of the battery.
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7.发明公开公开(公告)号：US20240356156A1
公开(公告)日：2024-10-24
申请号：US18592548
申请日：2024-03-01
发明人： Lei Li , Haiyang Kang , Yi Zheng , Meihuang Chen , Runhao Lai , Peng Wang , Chengdong Sun
IPC分类号： H01M50/42 , C08J3/12 , C08L23/12 , C08L33/06 , H01M50/417 , H01M50/449
CPC分类号： H01M50/42 , C08J3/126 , C08L23/12 , C08L33/066 , H01M50/417 , H01M50/449 , C08J2323/12 , C08J2333/08 , C08L2203/20 , C08L2207/53
摘要： The present application relates to the technical field of secondary batteries, and in particular to a binder for secondary batteries and a preparation method, a secondary battery, and an electrical apparatus thereof. The binder includes a core structure and a shell structure disposed on a surface of the core structure. The shell structure includes an acrylate copolymer, and the core structure comprises a rigid polymer. The rigid polymer has a crystallinity ranging from 32% to 94%. The binder with a core-shell structure includes the core structure of the rigid polymer. During cold pressing of a battery cell, the rigid polymer acts as a support, making a particle structure of the binder stable, that is, the rigid polymer acts as a support, resulting in an overall increase in the rigidity of the binder.
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8.发明公开公开(公告)号：US20240145868A1
公开(公告)日：2024-05-02
申请号：US18410993
申请日：2024-01-11
发明人： Haiyi Hong , Jianrui Yang , Haiyang Kang , Chengdong Sun , Yi Zheng , Lei Chao
IPC分类号： H01M50/451 , H01M50/403 , H01M50/417 , H01M50/42 , H01M50/423 , H01M50/426 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/457 , H01M50/46 , H01M50/491
CPC分类号： H01M50/451 , H01M50/403 , H01M50/417 , H01M50/42 , H01M50/423 , H01M50/426 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/457 , H01M50/461 , H01M50/491 , H01M2220/20
摘要： Provided a separator, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus containing such separator. The separator includes: a substrate and a coating applied on at least one surface of the substrate, where the coating includes 40 wt % to 90 wt % first organic particles, 2 wt % to 15 wt % pressure-sensitive binder, and optionally 0 wt % to 50 wt % second organic particles. The first organic particles include an organic polymer and an inorganic substance. The pressure-sensitive binder includes an organic polymer and a plasticizer. The separator has good ionic conductivity and adhesion performance at room temperature, is not adhered under a pressure of 1 MPa or below and is significantly adhered under a pressure of 2 MPa or above, which can significantly improve structural stability and ionic conductivity of an electrochemical device while satisfying requirements for yield rate of production and kinetic performance of a battery cell.
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公开(公告)号：US20220367921A1
公开(公告)日：2022-11-17
申请号：US17875163
申请日：2022-07-27
发明人： Yi Zheng , Haiyang Kang , Hu Xu , Chengdong Sun
IPC分类号： H01M10/0587 , H01M10/0525 , H01M50/102 , H01M4/04 , H01M4/134
摘要： The embodiments of the application provide an electrode assembly and a manufacturing method and manufacturing system therefor, a battery cell and a battery. The electrode assembly includes a negative pole piece and a positive pole piece, the negative pole piece and the positive pole piece are wound to form a winding structure including a bending region and a straight region. Both the negative pole piece and the positive pole piece include a plurality of bent portions located in the bent area and a plurality of straight portions located in the straight area. At least one of the bent portions of the positive pole piece is a first bent portion, and/or at least one of the bent portions of the negative pole piece is a second bent portion.
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公开(公告)号：US20240360259A1
公开(公告)日：2024-10-31
申请号：US18765315
申请日：2024-07-07
发明人： Lei Li , Haiyang Kang , Chengdong Sun , Yi Zheng , Shaohua Ai
IPC分类号： C08F220/18 , C08K7/26 , C08K9/08 , H01M50/42 , H01M50/437 , H01M50/446 , H01M50/451
CPC分类号： C08F220/18 , C08K7/26 , C08K9/08 , H01M50/42 , H01M50/437 , H01M50/446 , H01M50/451 , C08K2201/005
摘要： A binder composition includes a polymer and ceramic particles, the polymer including structural units derived from a first-type monomer, a second-type monomer, and a third-type monomer, and a molar ratio of the first-type monomer, second-type monomer, and third-type monomer being (50 to 58):(40 to 44):(2 to 6); where the first-type monomer is selected from one or more compounds of formula I, the second-type monomer is selected from one or more compounds of formula II, and the third-type monomer is selected from one or more compounds of formula III. The binder improves the porosity of the separator, increases the ionic conductivity, and reduces the internal resistance, thereby enhancing the cycling performance of the secondary battery.
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