公开(公告)号：US20210111434A1

公开(公告)日：2021-04-15

申请号：US17130713

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567

Abstract: This application provides a nonaqueous electrolytic solution, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolytic solution includes a nonaqueous solvent and a lithium salt. The nonaqueous solvent includes a carbonate solvent and a high-oxidation-potential solvent. The carbonate solvent is a chain carbonate, and the high-oxidation-potential solvent is selected from one or more of compounds denoted by Formula I and Formula II. This application improves electrochemical performance of the lithium-ion battery under a high temperature and a high voltage as well as safety performance such as overcharge safety and hot-oven safety of the lithium-ion battery, and also ensures kinetic performance of the lithium-ion battery to some extent.

公开(公告)号：US20210111433A1

公开(公告)日：2021-04-15

申请号：US17130307

申请日：2020-12-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/62 ,  H01M10/42

Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolytic solution, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive electrode active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, and the positive electrode active material is a mixture of large particles Lix1Coy1M1-y1O2-z1Qz1 and small particles Lix1Coy1M1-y1O2-z1Qz1; an average particle size D50 of the large particles Lix1Coy1M1-y1O2-z1Qz1 is 10 μm-17 μm, and an average particle size D50 of the small particles Lix1Coy1M1-y1O2-z1Qz1 is 2 μm-7 μm. The electrolytic solution 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：US20200343558A1

公开(公告)日：2020-10-29

申请号：US16924842

申请日：2020-07-09

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.

公开(公告)号：US20190207187A1

公开(公告)日：2019-07-04

申请号：US16211582

申请日：2018-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0525

CPC classification number: H01M2/1653 ,  H01M2/145 ,  H01M2/1646 ,  H01M2/166 ,  H01M2/1686 ,  H01M10/052 ,  H01M10/0563 ,  H01M10/4235 ,  H01M2300/0094

Abstract: The present disclosure relates to a composite separator, a preparation method of the composite separator, and an electrochemical device containing the composite separator. The composite separator includes a substrate and an inorganic layer disposed on at least one surface of the substrate. The substrate is a porous substrate, and the inorganic layer is an inorganic dielectric layer which is a continuous dense film layer with porosity lower than 10% and contains no binder. A thickness of the inorganic layer is 20 nm-1000 nm. An interfacial peeling force between the inorganic layer and the substrate is no less than 30 N/m. The separator of the present application has high wettability with respect to electrolyte, almost no thermal shrinkage, relatively high mechanical strength, and favorable corrosion resistance and durability performances, and thus, a battery using the separator has relatively high thermal stability and nailing strength.

公开(公告)号：US20190190028A1

公开(公告)日：2019-06-20

申请号：US16211467

申请日：2018-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M4/628 ,  H01M2/1646 ,  H01M2/1673 ,  H01M4/0404 ,  H01M4/0421 ,  H01M4/0423 ,  H01M4/0428 ,  H01M4/13 ,  H01M4/133 ,  H01M4/134 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/382 ,  H01M4/386 ,  H01M4/405 ,  H01M4/583 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present disclosure provides a negative electrode, a method for preparing the negative electrode, and an electrochemical device. The negative electrode includes a current collector and a negative electrode active material layer disposed on at least one surface of the current collector and comprising a negative electrode active material. A porous inorganic dielectric layer is provided on a surface of the at least one negative electrode active material layer away from the current collector; a thickness of the porous inorganic dielectric layer is 20 nm-2000 nm, and the porous inorganic dielectric layer contains no binder. The negative electrode can alleviate lithium precipitation on negative electrode surface during large-current charging, stabilize negative electrode interface, and alleviate side reaction between the negative electrode and the electrolyte, thereby improving the cycle life of the battery, reducing short-circuit risk in the battery and improving high-temperature life of the battery.

公开(公告)号：US20190173088A1

公开(公告)日：2019-06-06

申请号：US16161978

申请日：2018-10-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/66 ,  H01M4/62 ,  H01M4/36 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/056

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 6 μm to 12 μm.

公开(公告)号：US20180198132A1

公开(公告)日：2018-07-12

申请号：US15827214

申请日：2017-11-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/66 ,  H01M10/052

CPC classification number: H01M4/668 ,  H01M4/661 ,  H01M4/663 ,  H01M10/052

Abstract: Provided are a current collector, an electrode plate, a battery and an application of the current collector. The current collector includes an insulation layer and a conductive layer. The insulation layer is configured to bear the conductive layer, the conductive layer is configured to bear an electrode active material layer. A room temperature film resistance RS of the conductive layer meets a conditional expression: 0.016Ω/□≤RS≤420Ω/□. By the current collector of the present application, the short circuit resistance of the battery in case of an abnormal situation causing the short circuit can be greatly increased, and the short circuit current can be greatly reduced. Thus, influence of the short circuit damage on the battery is limited to a point range, and an interrupt in the current only occurs in a point range, without disrupting normal operation of the battery in a certain period time.

公开(公告)号：US20230207812A1

公开(公告)日：2023-06-29

申请号：US18074416

申请日：2022-12-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU ,  Chengdu LIANG ,  Yongchao LIU ,  Xin SUN ,  Haotian XIE

IPC: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/00

CPC classification number: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/50 ,  H01M2004/028

Abstract: This application discloses a lithium supplement for lithium secondary batteries, a preparation method thereof, and a lithium secondary battery, a battery module, a battery pack, and an apparatus. Tests show that the lithium supplement of this application can maintain its own stability and low metal dissolution during long-term use of lithium secondary batteries, effectively improving energy density of lithium secondary batteries and ensuring a low self-discharge rate of lithium secondary batteries, thereby ensuring that the lithium secondary battery has high energy density, long cycle life, and high safety.

公开(公告)号：US20230071423A1

公开(公告)日：2023-03-09

申请号：US17988242

申请日：2022-11-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaofu XU ,  Yonghuang YE ,  Haizu JIN ,  Chengdu LIANG ,  Qian LIU ,  Xia HU

IPC: H01M50/242 ,  H01M50/209 ,  H01M50/291 ,  H01M50/103 ,  H01M10/613 ,  H01M10/6556

Abstract: A battery includes a plurality of battery cells and a support member configured to support the plurality of battery cells. The support member includes a recess. One battery cell of the battery cells extends into and is supported in the recess.

公开(公告)号：US20220399607A1

公开(公告)日：2022-12-15

申请号：US17887220

申请日：2022-08-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/267 ,  H01M50/204 ,  H01M50/51 ,  H01M4/583 ,  H01M4/485 ,  H01M4/38 ,  H01M50/249

Abstract: The present application relates to a battery module including a first-type battery cell and a second-type battery cell at least connected in series, where 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), and the second-type battery cell includes M second battery cell(s), where N and M are positive integers; and when a battery state of health (SOH) of a first battery cell is the same as an SOH of a second battery cell, and a state of charge (SOC) of the first battery cell is the same as an SOC of the second battery cell, a ratio of a total charge capacity of a first negative electrode sheet of the first battery cell to a total charge capacity of a second negative electrode sheet of the second battery cell is 0.8 to 1.2.