公开(公告)号：US20220231279A1

公开(公告)日：2022-07-21

申请号：US17586754

申请日：2022-01-27

Applicant: Contemporary Amperex Technology Co.,Limited

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

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/134

Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm−1˜960 cm−1, 1300 cm−1˜1380 cm−1 and 1520 cm−1˜1590 cm−1, respectively, in which the scattering peak at the Raman shift of 900 cm−1˜960 cm−1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm−1˜1590 cm−1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2≤Il/IG≤0.8.

公开(公告)号：US20220158246A1

公开(公告)日：2022-05-19

申请号：US17587915

申请日：2022-01-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Chenghua FU ,  Changlong HAN ,  Peipei CHEN

IPC: H01M10/0568 ,  H01M10/0525

Abstract: A lithium-ion battery and an apparatus are provided. The lithium-ion battery includes a battery housing, an electrolyte, and an electrode assembly. The lithium salt includes one or more of compounds represented by formula I, where n is an integer of 1 to 3, Rf1 and Rf2 are CmF2m+1, m is an integer of 0 to 5, Rf1 and Rf2 are the same or different, and a group margin of battery cell of the lithium-ion battery ranges from 85% to 95%. The lithium-ion battery has advantages of good cycling performance, good rate performance, high safety performance, and good low-temperature discharge performance.

公开(公告)号：US20220144648A1

公开(公告)日：2022-05-12

申请号：US17584304

申请日：2022-01-25

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: C01B33/113 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/36

Abstract: The present application discloses a silicon-oxygen compound, a method for preparation thereof, and a secondary battery, a battery module, a battery pack and an apparatus related thereto. The silicon-oxygen compound includes both manganese element and a copper element, a content of the manganese element is from 20 ppm to 500 ppm, and a mass ratio of the manganese element to the copper element is from 1 to 18.

公开(公告)号：US20220123322A1

公开(公告)日：2022-04-21

申请号：US17645499

申请日：2021-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Qisen HUANG ,  Shiwen WANG

IPC: H01M4/66

Abstract: Positive current collector, positive plate, electrochemical device and apparatus are disclosed. The positive current collector includes a support layer and a metal conductive layer disposed on the support layer, where a ratio of a density of the metal conductive layer to an intrinsic density of a material of the metal conductive layer is greater than or equal to 0.89, and the material of the metal conductive layer is selected from one or more of aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy. The positive current collector can provide simultaneously both low weight and high electrical performance, thus enabling the electrochemical device to achieve both high weight energy density and electrochemical performance at the same time.

公开(公告)号：US20220123300A1

公开(公告)日：2022-04-21

申请号：US17563694

申请日：2021-12-28

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0567

Abstract: A lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolytic solution. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film A positive active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1. A negative active material in the negative electrode sheet includes one or more of Si, SiOx2, a Si/C composite material, and a Si alloy. The electrolytic solution contains an additive A and an additive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is a halogen-substituted cyclic carbonate compound. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US20220115686A1

公开(公告)日：2022-04-14

申请号：US17556991

申请日：2021-12-20

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/04 ,  H01M10/0525

Abstract: The present application provides a battery and an apparatus. The battery includes: a first-type battery cell group and a second-type battery cell group which are connected in series, wherein the first-type battery cell group is composed of multiple first-type batteries connected in parallel, and the second type battery cell group is composed of at least one second type battery cell connected in parallel; the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, and the volume energy density of the first-type battery cell is less than that of the second-type battery cell; and the capacity Cap1 of the first-type battery cell group is greater than the capacity Cap2 of the second-type battery cell group, in which Cap1 is the sum of the capacities of the corresponding first-type battery cells, and Cap2 is the sum of the capacities of the corresponding second-type battery cells.

公开(公告)号：US20220115653A1

公开(公告)日：2022-04-14

申请号：US17558646

申请日：2021-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liting HUANG ,  Yongsheng GUO ,  Chengdu LIANG ,  Jiadian LAN ,  Wenguang LIN

IPC: H01M4/485 ,  H01M4/587 ,  H01M10/054 ,  H01M4/505 ,  H01M4/525

Abstract: This application relates to a sodium-ion battery, a positive electrode plate for a sodium-ion battery, a battery module, a battery pack, and a device. The sodium-ion battery according to this application includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive active material. A molecular formula of the positive active material satisfies NaaLibM0.7Fe0.3−bO2±δ, M is a transition metal ion, 0.67

公开(公告)号：US20220013854A1

公开(公告)日：2022-01-13

申请号：US17113042

申请日：2020-12-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Xiaobo CHEN ,  Yao LI ,  Wei WANG ,  Yuepan HOU ,  Peng WANG ,  Yongshou LIN

IPC: H01M50/342 ,  H01M10/63 ,  H01M10/613 ,  H01M10/655

Abstract: Embodiments of the present application provide a battery. The battery includes: a battery cell comprising a pressure relief mechanism, at least a portion of the pressure relief mechanism protruding outward from a first wall of the battery cell, and the pressure relief mechanism being configured, when an internal pressure or temperature of the battery cell reaches a threshold, to be actuated to release the internal pressure; a thermal management component for containing a fluid to adjust a temperature of the battery cell; wherein a first surface of thermal management component is attached to the first wall of the battery cell, the first surface of thermal management component is provided with an avoidance chamber, and the avoidance chamber is configured to accommodate the at least portion of the pressure relief mechanism. According to the technical solutions of the embodiments of the present application, the safety of the battery can be enhanced.

公开(公告)号：US20210376371A1

公开(公告)日：2021-12-02

申请号：US17058463

申请日：2020-06-02

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Yiruo WANG ,  Chao YANG ,  Minghao TANG ,  Xiao WANG ,  Jiang LIN ,  Chuangchuang XIANG

IPC: H01M10/04

Abstract: The present application relates to a device for preparing an electrode assembly and a preparation method of the electrode assembly. Wherein the device for preparing the electrode assembly includes: a winding assembly; a plurality of first electrode plate unwinding apparatuses, configured to provide a plurality of first electrode plates for the winding assembly; and at least one second electrode plate unwinding apparatus, configured to provide at least one second electrode plate for the winding assembly, wherein a polarity of the first electrode plate is opposite to a polarity of the second electrode plate; and wherein the winding assembly is configured to wind the plurality of first electrode plates and the at least one second electrode plate, to form an electrode assembly. The present application is used for improving winding efficiency of the electrode assembly.

公开(公告)号：US20210376303A1

公开(公告)日：2021-12-02

申请号：US17120593

申请日：2020-12-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengyou XING ,  Chengdu LIANG ,  Ningsheng WU ,  Wenlong KANG ,  Peng WANG ,  Quankun LI ,  Lingyan JIANG

IPC: H01M2/02

Abstract: The present disclosure relates to a secondary battery, a battery module, and a device using the secondary battery as a power source. The secondary battery includes a casing and a top cover for connecting with the casing. The casing includes an end portion provided with an opening. The top cover is used to cover the opening of the casing. The top cover includes an inserting portion extending into the casing from the opening. A plurality of notches are provided on an inner side of the end portion of the casing or on a side wall of the inserting portion facing the casing. In the secondary battery, the battery module, and the device using the secondary battery as a power source according to the present disclosure, the secondary battery can reduce the possibility of short circuit occurring in the electrode assembly and improve the operational safety of the secondary battery.