公开(公告)号：US20220123436A1

公开(公告)日：2022-04-21

申请号：US17565499

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei LI ,  Chao JIN ,  Haihao SHI ,  Qian LI

IPC: H01M50/454 ,  H01M10/0525 ,  H01M50/417 ,  H01M50/403

Abstract: The present embodiments provide a separator, a process for preparing the same, a lithium ion secondary battery, a battery module, a battery pack and an apparatus. The separator provided by the present application comprises a porous base film and a functional coating disposed on at least one surface of the porous base film, wherein the functional coating comprises polyimide nanosheets, and the polyimide nanosheets are stacked irregularly to form a lamellar loose structure; and a thickness ratio of the functional coating to the porous base film is from 0.1 to 1.0. The present application also provides a process for preparing the separator, and a lithium ion secondary battery and an apparatus comprising the separator.

公开(公告)号：US20220102698A1

公开(公告)日：2022-03-31

申请号：US17547324

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei LI ,  Qingrui Xue ,  Jing Li ,  Zige Zhang ,  Yang Zhang ,  Yang Lu ,  Pengxiang Wang

IPC: H01M4/13 ,  H01M50/536 ,  H01M4/66 ,  H01M4/62 ,  H01M4/36 ,  H01M10/0525

Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate includes a current collector, an electrode active material layer provided on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is provided at a zone referred to as a membrane zone on a main body portion of the current collector, the electrical connection member and the current collector are welded and connected at a welding zone referred to as an adapting welding zone at an edge of the current collector, and a transition zone is referred to as an extension zone, where the transition zone is of the current collector between the membrane zone and the adapting welding zone and coated with no electrode active material layer. The current collector is a composite current collector.

公开(公告)号：US20180287158A1

公开(公告)日：2018-10-04

申请号：US15917612

申请日：2018-03-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yunjian MA ,  Wei LI ,  Haizu JIN ,  Yikuang JIN

IPC: H01M4/62

Abstract: Provided is a negative electrode plate. A negative electrode plate includes a negative current collector and a first coating layer arranged on a surface of the negative current collector. The negative electrode plate further includes a second coating layer arranged on a surface of the first coating layer. The first coating layer contains a negative electrode active material. The second coating layer contains a heat-resistant insulating material. The heat-resistant insulating material is selected from an oxide or a hydroxide containing at least one of elements selected from a group consisting of Mg, Si, Zr and Y. In the present application, the second coating layer containing the heat-resistant insulating material is coated on a surface of the conventional negative electrode active material layer, so an instantaneous high power discharge in a short circuit of the secondary battery can be avoided, and a safety performance of the battery can be improved.

公开(公告)号：US20240291056A1

公开(公告)日：2024-08-29

申请号：US18655440

申请日：2024-05-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Shiliang LIN ,  Zhen LIN ,  Shuai SONG ,  Wei LI ,  Zhonghong LI ,  Kai WU

IPC: H01M10/48 ,  H01M10/42 ,  H01M10/44

CPC classification number: H01M10/482 ,  H01M10/441 ,  H01M10/488 ,  H01M2010/4271

Abstract: An electrode assembly short circuit identification method includes: during charging, according to preset sampling time points, sequentially acquiring a voltage of an electrode assembly at each of the sampling time points; judging whether the electrode assembly has a continuous voltage drop according to the voltage acquired at each of the sampling time points; and determining whether the electrode assembly has a short circuit according to a judgment result.

公开(公告)号：US20240282973A1

公开(公告)日：2024-08-22

申请号：US18638670

申请日：2024-04-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Zhen LIN ,  Shiliang LIN ,  Xiaohui WU ,  Long WANG ,  Wei LI ,  Zhonghong LI ,  Kai WU

IPC: H01M4/62 ,  H01M4/02 ,  H01M10/0587

CPC classification number: H01M4/628 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode sheet has a straight portion and to-be-bent portions, A thickening layer is disposed on at least one side of a positive electrode current collector of at least some of the to-be-bent portions, the thickening layer is disposed between the positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer covers a surface of the thickening layer is a first positive electrode active material layer, and the positive electrode active material layer located in the straight portion is a second positive electrode active material layer. A ratio of a thickness of the first positive electrode active material layer to a thickness of the second positive electrode active material layer is 20-80%.

公开(公告)号：US20220352522A1

公开(公告)日：2022-11-03

申请号：US17620417

申请日：2019-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing LI ,  Qingrui XUE ,  Wei LI ,  Zige ZHANG ,  Yang ZHANG ,  Xianwei YANG

IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/62

Abstract: Positive plate, electrochemical device including same, and apparatus thereof are disclosed. The positive plate includes a current collector and an electrode active material layer arranged on at least one surface of the current collector, the current collector includes a support layer and a conductive layer arranged on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies: 30 nm≤D2≤3 μm. A material of the conductive layer is aluminum or aluminum alloy, and a density of the conductive layer is 2.5 g/cm3-2.8 g/cm3. The electrode active material layer includes an electrode active material, a binder, and a conductive agent, and the binder has an uneven distribution in a thickness direction of the electrode active material layer.

公开(公告)号：US20210288329A1

公开(公告)日：2021-09-16

申请号：US15734469

申请日：2019-11-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Jing LI ,  Wei LI ,  Qingrui XUE ,  Zige ZHANG ,  Xianwei YANG

IPC: H01M4/66 ,  H01M4/62 ,  H01M4/13 ,  H01M10/0525

Abstract: The electrode plate includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm≤D2≤3 μm; the electrode active material layer is divided into two regions, an inner region and an outer region in a thickness direction of the electrode active material layer, in which the weight percentage of the conductive agent in the inner region of the electrode active material layer is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer, and the conductive agent in the inner region of the electrode active material layer includes at least one of a one-dimensional conductive material and a two-dimensional conductive material.

公开(公告)号：US20210119218A1

公开(公告)日：2021-04-22

申请号：US17112749

申请日：2020-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing LI ,  Qingrui XUE ,  Zige ZHANG ,  Wei LI ,  Xianwei YANG

IPC: H01M4/66

Abstract: This application relates to an electrode plate that includes a current collector and an electrode active material layer disposed on at least one surface of the current collector. The current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer. A single-side thickness D2 of the conductive layer satisfies 30 nm≤D2≤3 μm, a conductive primer layer including a conductive material and a bonding agent is further disposed between the current collector and the electrode active material layer. The bonding agent in the conductive primer layer includes a water-based bonding agent. The electrode plate in this application has good machinability. An electrochemical apparatus including the electrode plate has high energy density, good electrical performance, and long-term reliability.

公开(公告)号：US20200020952A1

公开(公告)日：2020-01-16

申请号：US16233296

申请日：2018-12-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zige ZHANG ,  Qingrui XUE ,  Miao JIANG ,  Jing LI ,  Wei LI ,  Yuqian WEN ,  Long WANG

IPC: H01M4/64 ,  H01M10/04 ,  H01M2/26

Abstract: A secondary battery has an electrode plate, including a current collector, an active material layer and a conductive structure. The current collector includes an insulating layer, first and second conductive layers, and the first conductive layer and the second conductive layer are respectively arranged onto two surfaces of the insulating layer. The first conductive layer has a first body section with a first protruding section connected thereto. The second conductive layer has a second body section with a second protruding section connected thereto. The conductive structure includes a first conductive member connected to the first protruding section and a second conductive member connected to the second protruding section. The second conductive member is bent towards the first conductive member and connected to the first conductive member, and the first conductive member extends away from the active material layer and is beyond the second conductive member.

公开(公告)号：US20190393511A1

公开(公告)日：2019-12-26

申请号：US16374155

申请日：2019-04-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yaru ZHOU ,  Qingrui XUE ,  Zige ZHANG ,  Miao JIANG ,  Jing LI ,  Wei LI ,  Long WANG

IPC: H01M4/64 ,  H01M10/04 ,  H01M4/04

Abstract: The present disclosure provides a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer has a main body portion covered by the active material layer and a protrusion portion uncovered by the active material layer. The first protective layer is disposed on a side of the protrusion portion facing away from the insulating layer. The electrode plate further includes a conductive structure, which has a connecting portion fixed on the main body portion, and a first extending portion exceeding an end of the protrusion portion away from the main body portion. The first protective layer is disposed on a side of the connecting portion close to the active material layer along a height direction.