公开(公告)号：US20180198123A1

公开(公告)日：2018-07-12

申请号：US15686067

申请日：2017-08-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/04

CPC classification number: H01M4/583 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/362 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/027

Abstract: The present application relates to a negative electrode material for a secondary battery. The negative electrode material includes an expanded graphite and an organic phase change material intercalated into the expanded graphite. The present application further relates to a method for preparing the negative electrode material and a secondary battery using the negative electrode material. Since the organic phase change material is intercalated into the expanded graphite, when an internal temperature of the secondary battery increases, the organic phase change material absorbs heat by phase change, which can improve the heat storage and energy storage capacity and the safety performance of the secondary battery. In addition, since the organic phase change material has certain viscosity and flexibility, the adhesion performance of the negative electrode material on the current collector can also be improved.

公开(公告)号：US20230396089A1

公开(公告)日：2023-12-07

申请号：US18455076

申请日：2023-08-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Zhen LIN ,  Shan HUANG ,  Wei LI ,  Shichao LI

IPC: H02J7/00

CPC classification number: H02J7/00714 ,  H02J7/00711 ,  H02J7/0048

Abstract: A charging method for a battery pack includes sending, by a battery management module of the battery pack, a charging request for a first current to a charging pile for charging, controlling, by the battery management module in response to determining that first-current charging of the battery pack meets a first predetermined condition, the battery pack to perform pulse discharge, and controlling, by the battery management module in response to determining that the pulse discharge of the battery pack meets a second predetermined condition, the battery pack to stop discharging, and sending a charging request for a second current to the charging pile for charging. The second current is less than the first current.

公开(公告)号：US20230352664A1

公开(公告)日：2023-11-02

申请号：US18213269

申请日：2023-06-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Songjun SHI ,  Ying SHA ,  Zhen LIN ,  Wei LI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/131 ,  H01M4/04 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/628 ,  H01M4/131 ,  H01M4/0442 ,  H01M10/052 ,  H01M2004/027

Abstract: This application discloses a negative electrode plate, a preparation method thereof, a secondary battery, a battery module, a battery pack, and an electric apparatus. The negative electrode plate may include a negative electrode current collector and a negative electrode film layer, where the negative electrode film layer may be provided on at least one surface of the negative electrode current collector and may include a negative electrode active material; where at least part of surface of the negative electrode active material may be provided with an artificial solid electrolyte interface film, where the artificial solid electrolyte interface film may include a first inorganic lithium salt, and the first inorganic lithium salt may be selected from one or two of Li2CO3 and Li2SO3.

公开(公告)号：US20230307656A1

公开(公告)日：2023-09-28

申请号：US18315730

申请日：2023-05-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huaichao TANG ,  Kai WU ,  Chengdu LIANG ,  Wei LI

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M4/628 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M2004/028

Abstract: A secondary battery includes an electrode plate including a current collector, a functional layer, and an active material layer. At least a portion of a surface of the current collector includes a plurality of protruding portions and a plurality of recessed portions. The functional layer is disposed in one or more of the plurality of recessed portions. The active material layer covers and contacts the current collector and the functional layer. The functional layer includes at least one of a polymer material or a positive temperature coefficient (PTC) material.

公开(公告)号：US20220367996A1

公开(公告)日：2022-11-17

申请号：US17622024

申请日：2020-09-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xinxiang CHEN ,  Shoujun HUANG ,  Yulian ZHENG ,  Peng WANG ,  Wei LI ,  Chengdu LIANG

IPC: H01M50/655 ,  H01M50/15 ,  H01M50/186 ,  H01M50/342 ,  H01M50/308 ,  H01M50/184 ,  H01M50/103 ,  H01M50/209

Abstract: An end cover assembly includes: an end cover with a through hole for injecting electrolyte and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and is located on one side of the end cover away from an interior of the battery cell; a sealing ring for sealing the through hole; and a pressure relief device covering at least part of the sealing ring and closing the through hole; wherein the pressure relief device includes a second clamping portion, and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion; and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion.

公开(公告)号：US20210234188A1

公开(公告)日：2021-07-29

申请号：US17233337

申请日：2021-04-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei LI ,  Zige ZHANG ,  Chengdu LIANG ,  Qingrui XUE ,  Jing LI ,  Pengxiang WANG

IPC: H01M10/04 ,  H01M4/02

Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode plate comprises a current collector, an active material layer and a second conducting layer. The current collector comprises an insulating layer and a first conducting layer disposed on at least one surface of the insulating layer; and the active material layer is disposed on a main portion of the first conducting layer. The first conducting layer further includes a protruding portion not coated with the active material layer. The second conducting layer comprises a first portion disposed on a surface of the protruding portion of the first conducting layer opposite to the insulating layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode plate.

公开(公告)号：US20200161631A1

公开(公告)日：2020-05-21

申请号：US16452534

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/131 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/058 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M4/62

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：US20200006776A1

公开(公告)日：2020-01-02

申请号：US16375531

申请日：2019-04-04

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/66 ,  H01M4/70 ,  H01M2/26

Abstract: The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

公开(公告)号：US20240241178A1

公开(公告)日：2024-07-18

申请号：US18620862

申请日：2024-03-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Guisen WU ,  Hongjuan TAN ,  Wei LI

IPC: G01R31/364 ,  G01R31/388 ,  G01R31/396 ,  H01M50/569

CPC classification number: G01R31/364 ,  G01R31/388 ,  G01R31/396 ,  H01M50/569

Abstract: A battery cell includes a casing including a wall part and an accommodating cavity enclosed and formed by the wall part; an electrode assembly located in the accommodating cavity and connected with a first electrode terminal and a second electrode terminal; a third electrode arranged on the wall part; and a signal line including a first signal line connected with the third electrode and the first electrode terminal and a second signal line connected with the third electrode and the second electrode terminal.

公开(公告)号：US20240088396A1

公开(公告)日：2024-03-14

申请号：US18518604

申请日：2023-11-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/64 ,  H01M10/04 ,  H01M50/533

CPC classification number: H01M4/64 ,  H01M10/04 ,  H01M50/533 ,  H01M2004/021

Abstract: A secondary battery includes an electrode assembly including current collecting sections, an electrode terminal, and an adapter sheet connecting the current collecting sections to the electrode terminal. The electrode assembly includes active material layer(s), current collector(s) each including an insulating layer and first and second conductive layers sandwiching the insulating layer, and conductive structures each including first and second conductive members. A portion of the first conductive member extending beyond the second conductive member forms a current collecting section. The current collecting sections are laminated with each other, with one of the current collecting sections directly contacting the adapter sheet. Neighboring ones of the current collecting sections directly contact each other, without any second conductive member arranged therebetween.