公开(公告)号：US20220393227A1

公开(公告)日：2022-12-08

申请号：US17887800

申请日：2022-08-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/058 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M50/51

Abstract: The present application relates to a battery module, and the battery module includes a first-type battery cell and a second-type battery cell at least connected in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), the second-type battery cell includes M second battery cell(s), N and M are positive integers, a specific surface area of a positive active substance of the first battery cell is S1, a specific surface area of a positive active substance of the second battery cell is S2, and S1 and S2 satisfy: 1≤S1/S2≤60.

公开(公告)号：US20220246973A1

公开(公告)日：2022-08-04

申请号：US17562537

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haizu JIN ,  Hu XU ,  Baiqing LI ,  Xing LI ,  Chengdu LIANG

IPC: H01M10/04

Abstract: The present application provides an electrode assembly, including a negative electrode plate and a positive electrode plate, the negative electrode plate and the positive electrode plate being wound in a winding direction to form a winding structure including a bending area. Both the negative and the positive electrode plates include a plurality of bending portions located in the bending area. At least one bending portion in the negative electrode plate is a first bending portion, and an active substance capacity per unit area outside the first bending portion is greater than an active substance capacity per unit area inside the first bending portion; and/or, at least one bending portion in the positive electrode plate is a second bending portion, and an active substance capacity per unit area outside the second bending portion is greater than an active substance capacity per unit area inside the second bending portion.

公开(公告)号：US20220246903A1

公开(公告)日：2022-08-04

申请号：US17723531

申请日：2022-04-19

Applicant: Contemporary Amperex Technology Co.,Limited

Inventor： Shiwen WANG ,  Qisen HUANG ,  Huafeng HUANG ,  Chengdu LIANG

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/1397 ,  H01M4/136 ,  H01M50/46 ,  H01M10/0525

Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.

公开(公告)号：US20220200004A1

公开(公告)日：2022-06-23

申请号：US17582401

申请日：2022-01-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bobing HU ,  Chengyong LIU ,  Yongsheng GUO ,  Meng CHENG ,  Jiawei FU ,  Qian LI ,  Chengdu LIANG

IPC: H01M4/62 ,  H01M10/0562 ,  H01M10/0525 ,  H01M4/134

Abstract: This application provides a lithium secondary battery and a negative electrode plate for the lithium secondary battery. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, where a surface of the negative electrode active material layer closer to the current collector is provided with an elastic coating. And the elastic coating includes an elastic polymer and a conductive agent. At a pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 20% to 80% and an elastic modulus of 1 MPa to 800 MPa. And optionally, at the pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 30% to 60% and an elastic modulus of 5 MPa to 100 MPa.

公开(公告)号：US20220140318A1

公开(公告)日：2022-05-05

申请号：US16973152

申请日：2020-07-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Yuzhen ZHAO ,  Yingjie GUAN ,  Yan WEN ,  Qisen HUANG

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/62

Abstract: The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the outer surface of the core structure, wherein the core structure comprises one or more of silicon-based materials and tin based materials; and wherein the negative active material has an infrared spectrum comprising an infrared absorption peak at the wavelength of 1450 cm−1 to 1690 cm−1, and the infrared absorption peak has a transmittance T that satisfies 80%≤T≤99%.

公开(公告)号：US20210376372A1

公开(公告)日：2021-12-02

申请号：US17135741

申请日：2020-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Hu XU ,  Haizu JIN ,  Yuqun ZENG

IPC: H01M10/04 ,  H01M50/204 ,  H01M10/0585 ,  H01M10/0587

Abstract: An electrode assembly and a related battery, and battery module are provided, wherein the electrode assembly includes: at least one positive electrode plate and at least one negative electrode plate, the number of all the positive and negative electrode plates is greater than or equal to 3; the positive and negative electrode plates are wound around the winding axis and arranged in a superimposing manner along a direction vertical to the winding axis, each positive electrode plate includes a positive main body part, at least part of the positive main body part is a positive active substance area, each negative electrode plate includes a negative main body part, at least part of the negative main body part is the negative active substance area, two ends of the negative active substance area along the winding axis both exceed corresponding ends of the adjacent positive active substance area.

公开(公告)号：US20210344088A1

公开(公告)日：2021-11-04

申请号：US17134248

申请日：2020-12-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Qinglin BAI ,  Yanan CAI ,  Hongbo DING

IPC: H01M50/586 ,  H01M50/147 ,  H01M10/04 ,  H01M50/463 ,  H01M50/547

Abstract: Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.

公开(公告)号：US20210202998A1

公开(公告)日：2021-07-01

申请号：US17196943

申请日：2021-03-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Chenghua FU ,  Peipei CHEN ,  Junmin FENG

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0525

Abstract: This application provides a nonaqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolyte includes a nonaqueous solvent, a lithium salt, and an additive. The nonaqueous solvent is a high oxidation potential solvent, and the additive includes cyclic sulfate. The high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II, and the cyclic sulfate may be selected from one or more of compounds represented by formula III. This application can not only improve electrochemical performance of the lithium-ion battery under high temperature and high voltage and improve safety performance such as overcharge safety and hot box safety of the lithium-ion battery, but also ensure that the lithium-ion battery has some kinetic performance.

公开(公告)号：US20210119260A1

公开(公告)日：2021-04-22

申请号：US17131803

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Cuiping ZHANG ,  Ming ZHANG ,  Peipei CHEN ,  Hailin ZOU ,  Liye LI

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/525 ,  C07C311/48 ,  C07D327/00

Abstract: The present application relates to a lithium ion battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolytic solution, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer provided on at least one side of the positive electrode current collector, and the electrolytic solution including an organic solvent, a lithium salt and an additive, wherein the lithium salt comprises a primary lithium salt, the primary lithium salt is a first compound in an amount of 30% or more relative to the total molar amount of the lithium salt, and the first compound has a structure represented by the following formula I, and wherein the additive comprises a second compound represented by the following formula II.

公开(公告)号：US20190341622A1

公开(公告)日：2019-11-07

申请号：US16514428

申请日：2019-07-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/66

Abstract: A battery is provided in the present disclosure. The battery includes: a positive electrode plate including a positive current collector and a positive active material layer; a negative electrode plate including a positive current collector and a negative active material layer; and an electrolyte. The positive current collector includes an insulation layer used to support a conductive layer and the conductive layer used to support the positive active material layer and located above at least one surface of the insulation layer. The conductive layer has a thickness of D2 which satisfies: 300 nm≤D2≤2 μm. A protective layer is arranged on at least one surface of the conductive layer. The negative current collector is a copper foil current collector having a thickness of 1 μm to 5.9 μm.