公开(公告)号：US20220149437A1

公开(公告)日：2022-05-12

申请号：US17583728

申请日：2022-01-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Zhiqiang LI ,  Changlong HAN

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/36 ,  H01M10/0569 ,  C01D15/00 ,  C01B21/086

Abstract: This application discloses a lithium-ion battery, and related battery module, a battery pack, and an apparatus. The lithium-ion battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, where the negative electrode plate includes a negative electrode active material layer containing a negative electrode active material, and the electrolyte includes an electrolyte lithium salt. The electrolyte lithium salt includes a first lithium salt, the first lithium salt is selected from fluorine-containing sulfonimide lithium salts, and the first lithium salt and the negative electrode plate satisfy the following relation (1). The lithium-ion battery of this application has high safety performance, long cycle life, and good high-temperature storage performance. 0.6 ≤ M E × C I M A P ⁢ D A × P A ≤ 6 . 2 ( 1 )

公开(公告)号：US20220109189A1

公开(公告)日：2022-04-07

申请号：US17550946

申请日：2021-12-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengyong LIU ,  Yongsheng GUO ,  Chengdu LIANG ,  Quan FAN

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/052

Abstract: This application provides an electrolytic solution and a lithium metal battery containing the electrolytic solution. The electrolytic solution includes a lithium salt, an organic solvent, and an additive. The additive includes a sultam compound represented by Structural Formula I. R is selected from substituted or unsubstituted C1 to C10 hydrocarbyls, where a substituent is selected from a phenyl, C1 to C6 alkyls, or C1 to C6 alkenyls. X is a sulfur atom or a phosphorus atom. R1 and R2 each are independently selected from an oxygen atom, a fluorine atom, a chlorine atom, a bromine atom, and substituted or unsubstituted C1 to C10 hydrocarbyls. Both R1 and R2 are not oxygen atoms concurrently.

公开(公告)号：US20210376428A1

公开(公告)日：2021-12-02

申请号：US17130717

申请日：2020-12-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M50/538 ,  H01M10/0587 ,  H01M50/54 ,  H01M10/0525

Abstract: An electrode assembly as provided includes a plurality of first electrode plates and at least one second electrode plate. The plurality of first electrode plates and the at least one second electrode plate are wound around a winding axis to form a winding structure. In the winding structure, the plurality of first electrode plates and the second electrode plate are arranged in a superimposing manner along a direction vertical to the winding axis. Each first electrode plate includes a first current collector and a first active substance layer, and the first current collector includes a first main body portion and a first tab which protrudes from the first main body portion along the direction of the winding axis; wherein each first tab and the first main body portion are arranged in parallel along the winding axis.

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：US20210202997A1

公开(公告)日：2021-07-01

申请号：US17189084

申请日：2021-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

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

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, where the nonaqueous solvent includes a carbonate solvent and 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：US20210175499A1

公开(公告)日：2021-06-10

申请号：US17140088

申请日：2021-01-03

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/48 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/36

Abstract: The present application provide a silicon-oxygen compound, a preparation method thereof and related secondary battery, battery module, battery pack, and device. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0

公开(公告)号：US20210111412A1

公开(公告)日：2021-04-15

申请号：US17132173

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Qisen HUANG ,  Shiwen WANG

IPC: H01M4/66

Abstract: A positive electrode current collector, a positive electrode piece, an electrochemical device and an apparatus, where the positive electrode current collector includes a support layer and a conductive layer provided on the support layer, where a material of the conductive layer is aluminum or aluminum alloy, and a thickness Di of the conductive layer is 300 nm≤D1≤2 μm; an elongation at break B of the support layer is 10000%≥B≥12%, and a volume resistivity of the support layer is greater than or equal to 1.0×10−5 Ω·m; when a tensile strain of the positive electrode current collector is 2%, a square resistance growth rate Ti of the conductive layer is T1≤10%. The positive electrode current collector provided in the present application can simultaneously take into account both high safety performance and electrical performance.

公开(公告)号：US20210036368A1

公开(公告)日：2021-02-04

申请号：US17043683

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

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

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

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, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is an anhydride compound. The additive C is a halogen substituted cyclic carbonate compound.

公开(公告)号：US20200295377A1

公开(公告)日：2020-09-17

申请号：US16342831

申请日：2018-12-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/66 ,  H01M10/0525

Abstract: The present disclosure relates to the field of battery and, in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector of the present disclosure includes an insulation layer and a conductive layer. The insulation layer is used to support the conductive layer. The conductive layer is used to support an electrode active material layer and is located on at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. The insulation layer has a thickness of D1 satisfying 1 μm≤D1≤10 μm. The conductive layer has a thickness of D2 satisfying 200 nm≤D2≤1.5 μm. The insulation layer has a tensile strength greater than or equal to 150 MPa.

公开(公告)号：US20190326635A1

公开(公告)日：2019-10-24

申请号：US16373032

申请日：2019-04-02

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yao JIANG ,  Chunhua HU ,  Tiancheng YI ,  Lu MIAO ,  Chengdu LIANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01G11/64 ,  H01G11/60

Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.01% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.