公开(公告)号：US20220393292A1

公开(公告)日：2022-12-08

申请号：US17889422

申请日：2022-08-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian LIU ,  Chengdu Liang ,  Xiaofu Xu ,  Quanguo Li ,  Yonghuang Ye ,  Haizu Jin

IPC: H01M50/267 ,  H01M50/204 ,  H01M50/51 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505

Abstract: The present application relates to a battery module, comprising a first type of battery cells and a second type of battery cells electrically connected at least in series, wherein the first and second type of battery cells are battery cells of different chemical systems, the first type of battery cells comprises N first battery cells, the second type of battery cells comprises M second battery cells, and N and M are positive integers; a positive electrode plate of the second battery cell contains two or more positive electrode active materials, and when a dynamic SOC of the second battery cell is in a range from 90% to 98%, a change rate ΔOCV/ΔSOC in an OCV relative to the SOC of the second battery cell satisfies 3≤ΔOCV/ΔSOC≤9, in mV/% SOC, where SOC represents a charge state and OCV represents an open circuit voltage.

公开(公告)号：US20220367985A1

公开(公告)日：2022-11-17

申请号：US17815216

申请日：2022-07-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wenwei Chen ,  Xiaona Wang ,  Zige Zhang ,  Qingrui Xue ,  Chengdu Liang

IPC: H01M50/533 ,  H01M50/169 ,  H01M50/566 ,  H01M50/209 ,  H01M50/54 ,  H01M4/38

Abstract: Embodiments provide an electrode assembly, a battery cell, a battery, an electrical apparatus, and a manufacturing method and device. In those embodiments, the electrode assembly includes: an electrode plate, including a main portion and at least one protruding portion. The main portion includes a metal substrate and an active material layer coated on a surface of the metal substrate. The protruding portion is connected to the metal substrate. The metal substrate protrudes along a length direction of the electrode assembly. Along a thickness direction of the electrode assembly, a size of at least a part of the protruding portion is greater than a size of the metal substrate. The electrode assembly according to the Embodiments aims to solve a technical problem of severe heat emission of a tab.

公开(公告)号：US11362395B2

公开(公告)日：2022-06-14

申请号：US17565490

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huaichao Tang ,  Wei Li ,  Kai Wu ,  Chengdu Liang

IPC: H01M50/583 ,  H01M50/271 ,  H01M50/505 ,  H01M50/55

Abstract: The disclosure relates to an end cover assembly, a secondary battery, a battery pack and an electric device. An end cover assembly for a secondary battery includes: an end cover; a first terminal including a first connecting section and a second connecting section disposed along a radial direction; a second terminal including a third connecting section, a fuse section and a fourth connecting section sequentially connected along the radial direction; along an axial direction, orthographic projections of the first and third connecting sections at least partially overlap with each other, one of the first and third connecting sections is configured to connect with a busbar, the other is configured to connect with an electrode assembly, the fourth connecting section is configured to connect with the second connecting section; and an insulating component, at least a part of which is located between the first connecting section and the third connecting section.

公开(公告)号：US11316198B2

公开(公告)日：2022-04-26

申请号：US17144517

申请日：2021-01-08

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng Yi ,  Chunhua Hu ,  Yao Jiang ,  Shushi Dou ,  Chengdu Liang

IPC: H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/525 ,  H01M10/0525

Abstract: The present 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 sheet, a negative electrode sheet and a separation film. The positive active material in the positive electrode sheet includes Lix1Coy1M1-y1 O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1

公开(公告)号：US20220123368A1

公开(公告)日：2022-04-21

申请号：US17566699

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Peipei Chen ,  Chenghua Fu ,  Chang Peng

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M4/60

Abstract: The present application relates to a secondary 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 electrolyte solution, the negative electrode plate including a negative electrode current collector and a negative electrode active material layer provided on at least one side of the negative electrode current collector, and the electrolyte solution including an organic solvent and a lithium salt, wherein the negative electrode active material comprises a core structure and a polymer network coating layer coated on at least a part of the surface of the core structure.

公开(公告)号：US11271249B2

公开(公告)日：2022-03-08

申请号：US17056805

申请日：2019-12-13

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 ,  H01M4/02

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

公开(公告)号：US20210359335A1

公开(公告)日：2021-11-18

申请号：US17391064

申请日：2021-08-02

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian LIU ,  Yongsheng Guo ,  Chengdu Liang ,  Wenguang Lin ,  Gang Wang

IPC: H01M10/054 ,  H01M4/485 ,  H01M4/583 ,  H01M4/58 ,  H01M4/04 ,  H01M4/64

Abstract: The present application discloses a sodium-ion battery and an apparatus comprising the same. The sodium-ion battery comprises a positive electrode plate and a negative electrode plate; the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material; the negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer comprises a negative electrode active material, and the negative electrode active material is hard carbon; wherein a ratio of a median particle size A of the positive electrode active material to a median particle size B of the negative electrode active material satisfies 0.05≤A/B≤3.

公开(公告)号：US11177508B2

公开(公告)日：2021-11-16

申请号：US17146758

申请日：2021-01-12

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Shushi Dou ,  Chengdu Liang

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/02

Abstract: The present 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 sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.

公开(公告)号：US11152643B2

公开(公告)日：2021-10-19

申请号：US17146758

申请日：2021-01-12

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Shushi Dou ,  Chengdu Liang

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/02

Abstract: The present 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 sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.

公开(公告)号：US20210313567A1

公开(公告)日：2021-10-07

申请号：US17345159

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changliang SHENG ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Chengdu Liang

IPC: H01M4/38 ,  H01M10/0525

Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode active material layer comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a channel penetratingly arranged along a thickness direction of the main body portion; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.