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：US20220153598A1

公开(公告)日：2022-05-19

申请号：US17586725

申请日：2022-01-27

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: C01B33/18 ,  C09C1/30

Abstract: This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0

公开(公告)号：US20220149434A1

公开(公告)日：2022-05-12

申请号：US17583240

申请日：2022-01-25

Applicant: Contemporary Amperex Technology Co, Limited.

Inventor： Tiancheng YI ,  Chunhua HU ,  Shushi DOU ,  Yao JIANG ,  Chengdu LIANG

IPC: H01M10/0567 ,  C01G51/00 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/145 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/42

Abstract: This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US20220140328A1

公开(公告)日：2022-05-05

申请号：US17059423

申请日：2020-07-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/485 ,  H01M4/62

Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0

公开(公告)号：US20220140325A1

公开(公告)日：2022-05-05

申请号：US17553839

申请日：2021-12-17

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/38 ,  H01M4/04

Abstract: The present application provides a negative electrode active material, a process for preparing the same, and a secondary battery, a battery module, a battery pack and an apparatus related the same. The negative electrode active material comprises a core material and a polymer-modified coating layer on at least a part of a surface of the core material, the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material, the polymer-modified coating layer comprises sulfur element and carbon element, the sulfur element has a mass percentage of from 0.2% to 4% in the negative electrode active material, the carbon element has a mass percentage of from 0.5% to 4% in the negative electrode active material, and the polymer-modified coating layer comprises a —S—C— bond.

公开(公告)号：US20220123375A1

公开(公告)日：2022-04-21

申请号：US17563080

申请日：2021-12-28

Applicant: Contemporary Amperex Technology CO., Limited

Inventor： Chengdu LIANG ,  Qian LIU ,  Quanguo LI ,  Yonghuang YE ,  Wei LI

IPC: H01M10/42 ,  H01M50/258 ,  H01M50/509 ,  H01M10/625

Abstract: The present application provides a battery module, an apparatus, a battery pack, and a method and device for manufacturing the battery module. The battery module includes: a first-type battery cell and a second-type battery cell, which are connected in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical system, and the volume energy density of the first-type battery cell is less than the volume energy density of the second-type battery cell; and the capacity Cap1 of the first-type battery cell is greater than the capacity Cap2 of the second-type battery cell. While ensuring the safety performance of the battery module, the service life and the energy throughput of the battery module are effectively improved.

公开(公告)号：US20220123320A1

公开(公告)日：2022-04-21

申请号：US17561748

申请日：2021-12-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Yongsheng GUO ,  Tao ZHANG ,  Chengyong LIU ,  Jun YANG

IPC: H01M4/62 ,  B22F1/145 ,  H01M4/38 ,  H01M10/0525

Abstract: Disclosed are a lithium metal composite electrode material for a lithium metal battery, a preparation method for the same, and an electrode, battery, battery module, battery pack and apparatus comprising the same. The lithium metal composite electrode material comprises: lithium metal particles and a lithium-containing conductive layer serving as a supporting framework, the supporting framework being filled with the lithium metal particles; wherein the lithium-containing conductive layer comprises an inorganic lithium compound and a lithium alloy. The lithium metal composite electrode material can solve the problems that, when lithium metal is used as a negative electrode, the electrolyte is easily consumed, and lithium dendrites are easily produced, deposited and dissolved to change electrode thickness, which in turn affects the cycle stability, electrical performance and structural stability of the battery, so as to achieve the purpose of improving the structural stability and cycle stability of the lithium metal electrode.

公开(公告)号：US20220123314A1

公开(公告)日：2022-04-21

申请号：US17563071

申请日：2021-12-28

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/04 ,  H01M10/0525

Abstract: The present application provides a negative electrode active material, a process, a battery, a battery module, a battery pack and an apparatus related to the same. The negative electrode active material comprises a core material and a polymer modified coating on at least a part of a surface of core material; wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere. The present application can reduce damage to the surface structure of the negative electrode active material, reduce loss of active ions and capacity, meanwhile can well improve coulomb efficiency and cycle performance of the battery.

公开(公告)号：US20220123303A1

公开(公告)日：2022-04-21

申请号：US17565469

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian LIU ,  Wenguang LIN ,  Yongsheng GUO ,  Chengdu LIANG

IPC: H01M4/58 ,  H01M10/054 ,  H01M4/62 ,  H01M4/04 ,  H01M4/02

Abstract: The present application relates to a positive electrode material for a sodium-ion battery and a preparation method thereof, and a sodium-ion battery, a battery module, a battery pack and an apparatus manufactured from the active material, the positive electrode material for the sodium-ion battery comprises a composite of sodium halophosphate with carbon having the following molecular formula: Na2M1hM2k(PO4)X/C, in which M1 and M2 are transition metal ions each independently selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W; h is from 0 to 1, k is from 0 to 1, and h+k=1; X is halogen ion selected from F, Cl and Br, wherein the positive electrode material has a powder resistivity in the range of from 10 Ω·cm to 5,000 Ω·cm under a pressure of 12 MPa.

公开(公告)号：US20220069355A1

公开(公告)日：2022-03-03

申请号：US17521766

申请日：2021-11-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/46 ,  H01M4/66

Abstract: This application provides a lithium metal battery, and relates to the battery field. The lithium metal battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolytic solution infiltrating the separator. The negative electrode includes a negative electrode current collector and a lithium-aluminum alloy layer disposed on at least one surface of the negative electrode current collector; and the electrolytic solution includes an electrolyte and a solvent, where the solvent contains a film-forming agent, and the film-forming agent is FEC and/or DFEC.