公开(公告)号：US20240356158A1

公开(公告)日：2024-10-24

申请号：US18759062

申请日：2024-06-28

Applicant: SHENZHEN SENIOR TECHNOLOGY MATERIAL CO., LTD.

Inventor： Yanjie WANG ,  Zelin CHEN ,  Hua SUN ,  Jianqiang SHEN ,  Bin TAN

IPC: H01M50/446 ,  C08K3/22 ,  C08K3/32 ,  C08K7/02 ,  C09D129/04 ,  C09D133/02 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/449

CPC classification number: H01M50/446 ,  C09D129/04 ,  C09D133/02 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/449 ,  C08K2003/2227 ,  C08K2003/325 ,  C08K7/02 ,  C08K2201/003 ,  C08K2201/005

Abstract: The present disclosure provides a coating for battery separator, a preparation method thereof, a battery separator and a battery, where a coating slurry of the coating for the battery separator includes a dispersion medium, a nanomaterial, and a polymer containing polar functional groups; the coating has a surface pore size of 10 nm-30 nm, and a surface roughness of 200 nm-500 nm, and the coating has a hydroxyl content of 100 mg KOH/g-4000 mg KOH/g. The coating for battery separator, the preparation method thereof, the battery separator and the battery can solve a problem of deformation of battery separators due to the induction of electrolyte solutions.

公开(公告)号：US20240347861A1

公开(公告)日：2024-10-17

申请号：US18619929

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Qiao ZENG ,  Tianjing ZHANG

IPC: H01M50/46 ,  H01M50/119 ,  H01M50/417 ,  H01M50/42 ,  H01M50/426 ,  H01M50/449 ,  H01M50/466

CPC classification number: H01M50/46 ,  H01M50/119 ,  H01M50/417 ,  H01M50/42 ,  H01M50/426 ,  H01M50/449 ,  H01M50/466

Abstract: A secondary battery includes an electrode assembly and a pocket. The electrode assembly includes a plurality of electrode plates and a separator including a first separator layer and a second separator layer. The plurality of electrode plates include a first outermost electrode plate, a second outermost electrode plate, a first second-to-outermost electrode plate, and a second second-to-outermost electrode plate. The first outermost electrode plate and the second outermost electrode plate are located on two opposite sides of the plurality of electrode plates in the first direction. The first outermost electrode plate and the first second-to-outermost electrode plate are located on two opposite sides of the first separator layer. The second outermost electrode plate and the second second-to-outermost electrode plate are located on two opposite sides of the second separator layer. The pocket includes a first sidewall extending in the first direction.

公开(公告)号：US20240339652A1

公开(公告)日：2024-10-10

申请号：US17749175

申请日：2022-05-20

Applicant: SOTERIA BATTERY INNOVATION GROUP, INC.

Inventor： Brian G. Morin ,  Carl C. Hu

IPC: H01M10/0525 ,  H01M4/66 ,  H01M4/70 ,  H01M10/052 ,  H01M50/414 ,  H01M50/42 ,  H01M50/429 ,  H01M50/434 ,  H01M50/489 ,  H01M50/581

CPC classification number: H01M10/0525 ,  H01M4/667 ,  H01M4/668 ,  H01M4/70 ,  H01M10/052 ,  H01M50/414 ,  H01M50/42 ,  H01M50/429 ,  H01M50/434 ,  H01M50/489 ,  H01M50/581 ,  H01M2200/103

Abstract: Improvements in the structural components and physical characteristics of lithium battery articles are provided. Standard lithium ion batteries, for example, are prone to certain phenomena related to short circuiting and have experienced high temperature occurrences and ultimate firing as a result. Structural concerns with battery components have been found to contribute to such problems. Improvements provided herein include the utilization of thin metallized current collectors (aluminum and/or copper, as examples), high shrinkage rate materials, materials that become nonconductive upon exposure to high temperatures, and combinations thereof. Such improvements accord the ability to withstand certain imperfections (dendrites, unexpected electrical surges, etc.) within the target lithium battery through provision of ostensibly an internal fuse within the subject lithium batteries themselves that prevents undesirable high temperature results from short circuits. Battery articles and methods of use thereof including such improvements are also encompassed within this disclosure.

公开(公告)号：US12113238B2

公开(公告)日：2024-10-08

申请号：US17463907

申请日：2021-09-01

Applicant: SK Innovation Co., Ltd. ,  SK ie technology Co., Ltd.

Inventor： Tae Wook Kwon ,  Heung Taek Bae ,  Dong Yeon Lee ,  Yun Bong Kim

IPC: H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/42 ,  H01M50/449 ,  H01M50/489

CPC classification number: H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/42 ,  H01M50/449 ,  H01M50/489

Abstract: Provided is a separator for a lithium secondary battery including a porous substrate and a coating layer including a binder and inorganic particles formed on one surface or both surfaces of the porous substrate. The binder is a binder including: (a) a (meth)acrylamide-based monomer polymerization unit, (b) a (meth)acryl-based monomer polymerization unit containing a hydroxyl group, and (c) a polyfunctional (meth)acrylamide-based monomer polymerization unit. The separator according to the present invention provides a separator for a lithium secondary battery having improved adhesive strength between the inorganic particles and the separator, showing a decreased interfacial resistance characteristic, and showing an improved air permeability.

公开(公告)号：US20240313352A1

公开(公告)日：2024-09-19

申请号：US18657806

申请日：2024-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaonan Cheng ,  Haiyi Hong ,  Yanyun Ma ,  Jianrui Yang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489

CPC classification number: H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489 ,  H01M2220/20

Abstract: 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.

公开(公告)号：US20240304819A1

公开(公告)日：2024-09-12

申请号：US18664259

申请日：2024-05-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaonan Cheng ,  Haiyi Hong ,  Lei Li ,  Jianrui Yang ,  Peng Wang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M4/62 ,  H01M4/02 ,  H01M50/42

CPC classification number: H01M4/622 ,  H01M50/42 ,  H01M2004/021

Abstract: 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.

公开(公告)号：US20240274978A1

公开(公告)日：2024-08-15

申请号：US18631365

申请日：2024-04-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi HONG ,  Xiaonan CHENG ,  Yanyun MA ,  Jianrui YANG ,  Peng WANG ,  Lei CHAO ,  Yi ZHENG ,  Chengdong SUN

IPC: H01M50/446 ,  H01M50/42 ,  H01M50/431 ,  H01M50/443

CPC classification number: H01M50/446 ,  H01M50/42 ,  H01M50/431 ,  H01M50/443

Abstract: This application discloses a separator and a preparation method thereof, a battery, and an electric apparatus. The separator includes a substrate and a coating, where the coating is formed on at least a portion of surface of the substrate, and the coating includes composite particles and a binder. 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. Crosslinking degree a of the composite particles and mass swelling degree b thereof in an electrolyte satisfy a/b≥1 and a≥75%.

公开(公告)号：US12040507B2

公开(公告)日：2024-07-16

申请号：US17254870

申请日：2018-06-26

Applicant: SHENZHEN SENIOR TECHNOLOGY MATERIAL CO., LTD.

Inventor： Yongqiang Yao ,  Xiang Ping ,  Liuhao Zhang ,  Bin Ye ,  Xiufeng Chen

IPC: H01M50/449 ,  H01M10/052 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/426 ,  H01M50/434 ,  H01M50/446 ,  H01M50/491 ,  H01M50/497

CPC classification number: H01M50/449 ,  H01M10/052 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/426 ,  H01M50/434 ,  H01M50/446 ,  H01M50/491 ,  H01M50/497

Abstract: The present disclosure relates to a composite lithium battery separator and a preparation process therefor. The composite lithium battery separator includes a base film or a ceramic film, and a coating layer covering one side or both sides of the base film or the ceramic film. The coating layer is formed by coating a slurry. The slurry includes 5%-45% by weight of a coating polymer and 55%-95% by weight of an organic solvent, and the coating polymer includes 10-100 parts by weight of a fluorine or acrylic resin polymer, 0.5-10 parts of a polymer adhesive, and 0-90 parts of inorganic nanoparticles.

公开(公告)号：US11990642B2

公开(公告)日：2024-05-21

申请号：US17255825

申请日：2019-09-27

Applicant: LG CHEM, LTD.

Inventor： Young-Bok Kim ,  Dong-Wook Sung ,  So-Mi Jeong

IPC: H01M50/449 ,  H01G11/52 ,  H01M50/403 ,  H01M50/42 ,  H01M50/426 ,  H01M50/443 ,  H01M50/446 ,  H01M50/46 ,  H01M50/489

CPC classification number: H01M50/449 ,  H01G11/52 ,  H01M50/403 ,  H01M50/42 ,  H01M50/426 ,  H01M50/443 ,  H01M50/446 ,  H01M50/461 ,  H01M50/489

Abstract: A separator including a porous polymer substrate and an inorganic coating layer formed on at least one surface of the porous polymer substrate. The inorganic coating layer includes inorganic particles and a binder resin. The binder resin includes a first binder resin and a second binder resin. The first binder resin comprises a polyvinylidene fluoride (PVdF)-based polymer and the second binder resin comprises an acrylic polymer. The acrylic polymer has an acid value of 1 or less and a glass transition temperature, Tg, of 90° C. to 130° C. In addition, the inorganic coating layer has a high content of binder resin at the top layer portion to provide excellent adhesion between the separator and an electrode.

公开(公告)号：US20240162563A1

公开(公告)日：2024-05-16

申请号：US18279041

申请日：2021-04-08

Applicant: LG ENERGY SOLUTION, LTD.

Inventor： Hiroki MIKUNI ,  Naoto KURODA

IPC: H01M50/42 ,  H01M10/0525 ,  H01M50/46

CPC classification number: H01M50/42 ,  H01M10/0525 ,  H01M50/46

Abstract: One aspect of the present invention provides a lithium ion secondary battery which sequentially comprises a positive electrode mixture layer, a separation membrane, and a negative electrode mixture layer in the stated order, wherein: the positive electrode mixture layer contains a positive electrode active material, a first lithium salt, and a first solvent; the negative electrode mixture layer contains a negative electrode active material, a second lithium salt, and a second solvent that is different from the first solvent; and the separation membrane contains a third lithium salt and a polymer that comprises, as a monomer unit, a monomer represented by formula (1).




[wherein, in formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents a divalent organic group, R3, R4 and R5 each independently represents a hydrogen atom or a monovalent organic group, and X− represents a counter anion.]