公开(公告)号：US20230024649A1

公开(公告)日：2023-01-26

申请号：US17950978

申请日：2022-09-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi HONG ,  Cong CHENG ,  Yuanyuan LAN ,  Jianrui YANG ,  Na LIU ,  Haizu JIN

IPC: H01M50/446 ,  H01M50/457 ,  H01M50/434 ,  H01M50/417 ,  H01M50/426 ,  H01M50/42 ,  H01M50/443 ,  H01M50/403 ,  H01M50/494

Abstract: The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles; the first organic particles and the second organic particles are embedded in the inorganic particles and form protrusions on the surface of the coating; the first organic particles have a number-average particle size of >10 μm, and the second organic particles have a number-average particle size of 2 μm-10 μm. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

公开(公告)号：US20220416330A1

公开(公告)日：2022-12-29

申请号：US17892621

申请日：2022-08-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo LI ,  Yonghuang YE ,  Chengdu LIANG ,  Haizu JIN ,  Qian LIU ,  Xiaofu Xu

IPC: H01M16/00 ,  H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M50/209 ,  H01M50/489

Abstract: The application relates to a battery module, a manufacturing method and a manufacturing device thereof, a battery pack and a power consumption apparatus. The battery module includes a first-type battery cell and a second-type battery cell having different chemical systems and being electrically connected at least in series, where under the conditions of 25° C. and 100% state of charge (SOC), specific power density P2 of the second-type battery cell is higher than specific power density P1 of the first-type battery cell. Satisfying: 0.04≤(r1/m)/(r2/n)≤14, where, r1 and r2 are resistances per unit area of a positive electrode plate of the first-type battery cell and a positive electrode plate of the second-type battery cell respectively, and m and n are numbers of laminations of the positive electrode plate of the first-type battery cell and the positive electrode plate of the second-type battery cell.

公开(公告)号：US20220311056A1

公开(公告)日：2022-09-29

申请号：US17563309

申请日：2021-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Miaomiao REN ,  Xing LI ,  Haizu JIN

IPC: H01M10/0587 ,  H01M4/02

Abstract: An embodiment of the present application provides an electrode assembly, a battery cell, a battery, and a manufacturing method and device for the electrode assembly, which belong to the technical field of batteries. The electrode assembly includes a negative electrode plate and a positive electrode plate. The negative electrode plate includes a negative active material layer located in the straight area, and the positive electrode plate includes a positive active material layer located in the straight area. A first direction is perpendicular to an axial direction of a winding structure. The negative active material layer includes a negative electrode main body portion and negative electrode edge portions located on both sides of the negative electrode main body portion. The electrode assembly of this structure can effectively reduce the risk of lithium plating and improve the safety of the battery.

公开(公告)号：US20220246993A1

公开(公告)日：2022-08-04

申请号：US17717736

申请日：2022-04-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haizu JIN ,  Hu XU ,  Xinxin DU ,  Xing LI ,  Chengdu LIANG ,  Yuqun ZENG

IPC: H01M10/0587

Abstract: Embodiments of the present application provide an electrode assembly, a battery cell, a battery, and a method and a device for manufacturing an electrode assembly. The electrode assembly includes a first electrode plate and a second electrode plate. The first electrode plate and the second electrode plate are wound along a winding direction to form a winding structure, and the winding structure includes a bending region. The first electrode plate includes a first segment that exceeds a winding starting end of the second electrode plate, and at least a part of the first segment is configured to provide a support force to a part of the first electrode plate and the second electrode plate in the bending region and located at an outer side the first segment, making a structure of the first electrode plate and the second electrode plate more compact in the bending region.

公开(公告)号：US20220140345A1

公开(公告)日：2022-05-05

申请号：US17577823

申请日：2022-01-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xing LI ,  Yaohui WANG ,  Haizu JIN

IPC: H01M4/58

Abstract: This application provides a positive electrode plate includes a positive electrode current collector, a first positive electrode membrane, and a second positive electrode membrane. The first positive electrode membrane includes a first positive electrode active material selected from one or more of phosphate materials LiFe1-x-yMnxMyPO4, where 0≤x≤1, 0≤y≤0.1, 0≤x+y≤1, M is selected from one or more of Cr, Mg, Ti, Al, Zn, W, Nb, or Zr. The second positive electrode membrane is arranged on the first positive electrode membrane and includes a second positive electrode active material, gram capacity of the second positive electrode active material is greater than gram capacity of the first positive electrode active material, the second positive electrode active material is different from the first positive electrode active material. Thickness D0 of the positive electrode current collector is less than or equal to thickness D1 of the first positive electrode membrane.

公开(公告)号：US20210320383A1

公开(公告)日：2021-10-14

申请号：US17356565

申请日：2021-06-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuanbao CHEN ,  Dongyang SHI ,  Ning CHEN ,  Haizu JIN ,  Zhenhua LI ,  Fei HU

IPC: H01M50/502 ,  H01M50/147 ,  H01M50/543 ,  H01M50/54 ,  H01M50/533

Abstract: The present application relates to a current collector and a secondary battery. The current collector is used to electrically connect a pole and tab of a secondary battery, and comprises: a first sheet; a second sheet that is disposed to intersect the first sheet, the second sheet being used to electrically connect to the pole; a current collection unit, the current collection unit and the second sheet being disposed at two opposite sides of the first sheet in a first thickness direction thereof, and the first thickness direction thereof intersecting with a second thickness direction of the second sheet; the current collection unit comprises a first current collection sheet, the first current collection sheet is used to electrically connect to the tab, and the first current collection sheet is provided with a first connection terminal that is connected to the first sheet.

公开(公告)号：US20200287179A1

公开(公告)日：2020-09-10

申请号：US16441895

申请日：2019-06-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Peng WANG ,  Haizu JIN ,  Linggang ZHOU ,  Dongyang SHI ,  Xingdi CHEN ,  Kaijie YOU

IPC: H01M2/10 ,  H01M2/12 ,  H01M10/04

Abstract: Disclosed is a battery module including a battery cell array structure, an upper cap and a lower cap, the battery cell array structure is disposed between the upper cap and the lower cap. Each battery cell includes an electrode assembly and a battery case. The electrode assembly is of a wound structure and flat, outer surface of the electrode assembly includes two flat surfaces facing each other in a vertical direction; or the electrode assembly is of a laminated structure, the first electrode plate, the separator and the second electrode plate are laminated in the vertical direction. Being distinguished from the existing technology, the maximum swelling force of the battery module may be reduced, thus end plates with smaller volumes may be selected to improve energy density of the battery module.

公开(公告)号：US20200212398A1

公开(公告)日：2020-07-02

申请号：US16394145

申请日：2019-04-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kaijie YOU ,  Haizu JIN ,  Dongyang SHI ,  Fei HU ,  Yu TANG ,  Yuepan HOU ,  Ziyuan LI ,  Jun MA

IPC: H01M2/12 ,  H01M2/10

Abstract: The present application discloses a battery pack, comprising a first battery module, a second battery module, a housing and a fireproof member. The first battery module includes a plurality of battery cells which are provided with vents; the second battery module includes a plurality of battery cells which are provided with vents. Both the first battery module and the second battery module are arranged in the housing; the fireproof member is vertically disposed and located between the vents of the first battery module, where the vents of the first battery module and the vents of the second battery module both face the fireproof member. The battery pack prevents collective thermal runaway of the battery cells by using the fireproof member to separate the battery cells of the first battery modules and the battery cells of the second battery modules.

公开(公告)号：US20200161695A1

公开(公告)日：2020-05-21

申请号：US16433662

申请日：2019-06-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu JIN ,  Xiaowen ZHANG ,  Zhenhua LI

IPC: H01M10/04 ,  H01M10/0565 ,  H01M4/525

Abstract: This application relates to a battery comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active material coated on at least one surface of the positive electrode current collector, and wherein an underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material and a first conductive material; and wherein an upper positive active material layer in contact with the underlying positive active material layer and away from the positive electrode current collector comprises a second positive active material, a second polymer material and a second conductive material, and the first polymer material comprises fluorinated polyolefin and/or chlorinated polyolefin polymer material. The battery has good safety and improved electrical properties.

公开(公告)号：US20200161624A1

公开(公告)日：2020-05-21

申请号：US16426871

申请日：2019-05-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Yongshou LIN ,  Zhenhua LI ,  Haizu JIN ,  Xiaowen ZHANG

IPC: H01M2/34 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0525 ,  H01G11/68 ,  H01G11/14

Abstract: The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, and wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler and wherein when the safety coating and the positive active material layer are collectively referred as a film layer, the film layer has an elongation of 30% or more. The positive electrode plate may improve the safety performance during nail penetration of the electrochemical device such as capacitor, primary battery or secondary battery and the like.