公开(公告)号：US11522181B2

公开(公告)日：2022-12-06

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 ,  H01M4/02

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：US20220109190A1

公开(公告)日：2022-04-07

申请号：US17550934

申请日：2021-12-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Zeli Wu ,  Peipei Chen ,  Chenghua Fu

IPC: H01M10/0568 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38 ,  H01M4/587

Abstract: This application provides a secondary battery and an apparatus containing the secondary battery. The secondary battery includes an electrolytic solution. The electrolytic solution includes an electrolyte salt and an organic solvent. The electrolyte salt includes lithium bis(fluorosulfonyl)imide (LiFSI) and lithium hexafluorophosphate (LiPF6). A volumetric molar concentration of the LiFSI in the electrolytic solution is 0.8 mol/L-1.2 mol/L; and a volumetric molar concentration of the LiPF6 in the electrolytic solution is 0.15 mol/L-0.4 mol/L. The organic solvent includes ethylene carbonate (EC), and mass percent of the EC in the organic solvent is less than or equal to 20%.

公开(公告)号：US11264683B2

公开(公告)日：2022-03-01

申请号：US17134248

申请日：2020-12-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Qinglin Bai ,  Yanan Cai ,  Hongbo Ding

IPC: H01M50/586 ,  H01M50/147 ,  H01M50/463 ,  H01M50/547 ,  H01M10/04

Abstract: Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.

公开(公告)号：US11239497B2

公开(公告)日：2022-02-01

申请号：US16370973

申请日：2019-03-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng Yi ,  Chunhua Hu ,  Lu Miao ,  Zijun Xu ,  Chengdu Liang

IPC: H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application provides an electrolyte and an electrochemical device, wherein the electrolyte comprises an additive A and an additive B, the additive A is present in an amount of 0.001% 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. This application can improve the cycle performance and storage performance of the electrochemical device, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions.

公开(公告)号：US20210336258A1

公开(公告)日：2021-10-28

申请号：US17371231

申请日：2021-07-09

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M10/054

Abstract: The present application discloses a positive electrode active material and its preparation method, a sodium ion battery and an apparatus containing the sodium ion battery. The positive electrode active material satisfies a chemical formula Na2+xCuhMnkMlO7−y, wherein M is one or more selected from Li, B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W, 0≤x≤0.5, 0.1

公开(公告)号：US20210135286A1

公开(公告)日：2021-05-06

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

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：US20210075063A1

公开(公告)日：2021-03-11

申请号：US17056740

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/48 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36 ,  C07D239/04 ,  C07D251/04 ,  C07F9/09 ,  C07F9/141

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 a silyl phosphite compound or a silyl phosphate compound or a mixture thereof. The additive C is a halogen substituted cyclic carbonate compound.

公开(公告)号：US10910652B2

公开(公告)日：2021-02-02

申请号：US16209459

申请日：2018-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Xin Liu ,  Zuyu Wu ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/02 ,  H01M4/75

Abstract: A current collector, an electrode plate, and an electrochemical device are provided in the present disclosure. The current collector includes an insulation layer and at least one conductive layer. The insulation layer is used to support the conductive layer. The at least one conductive layer is used to support an electrode active material layer and is located above at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. A metal protective layer is arranged on at least one surface of each of the at least one conductive layer.

公开(公告)号：US10818924B2

公开(公告)日：2020-10-27

申请号：US16152205

申请日：2018-10-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Ying Wang ,  Yongsheng Guo ,  Chengdu Liang ,  Xiqing Wang ,  Shuojian Su ,  Qian Liu

IPC: H01M4/00 ,  H01M4/58 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/054 ,  H01M4/04 ,  H01M4/62 ,  H01M4/02

Abstract: The present disclosure provides a positive electrode plate, a preparation method thereof and a sodium-ion battery. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material film. The positive electrode active material film provided on the positive electrode current collector and comprises a positive electrode active material. The positive electrode active material comprises a prussian blue analogue material, a molecular formula of the prussian blue analogue material is AxM[M′(CN)6]y, a water content of the positive electrode active material film is 100 μg/g˜5000 μg/g. The water content of the positive electrode active material film is controlled within a certain range, which can not only ensure the sodium-ion battery do not seriously swell during charge-discharge process, but also can ensure sodium-ion battery have excellent charge-discharge performance and cycle performance.

公开(公告)号：US10749184B2

公开(公告)日：2020-08-18

申请号：US16514428

申请日：2019-07-17

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.