公开(公告)号：US20210280910A1

公开(公告)日：2021-09-09

申请号：US16342852

申请日：2017-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01G11/64 ,  C07D295/15 ,  C07D317/38 ,  C07D327/10

Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.

公开(公告)号：US20210280857A1

公开(公告)日：2021-09-09

申请号：US17330400

申请日：2021-05-25

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/36 ,  C01B32/21 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/60 ,  H01M4/62

Abstract: The present application discloses a composite graphite material, a secondary battery, an apparatus and a preparation method thereof. The composite graphite material includes a core material and a coating layer coating at least a part of the surface of the core material, the core material including graphite; wherein the absolute value K of zeta potential of the composite graphite material in deionized water with a pH of 7 is at least 20 mV. The use of the composite graphite material provided by the present application can improve the cohesion and bonding force of the negative electrode plate, thereby reducing the cyclic expansion of the secondary battery.

公开(公告)号：US20210257657A1

公开(公告)日：2021-08-19

申请号：US16972824

申请日：2020-06-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Chengyong LIU ,  Bobing HU ,  Jiawei FU ,  Qian LI ,  Meng CHENG ,  Yongsheng GUO

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/0585

Abstract: The present application provides a preparation method for a solid electrolyte, including: acquiring an initial reaction mixture including a lithium precursor, a central atom ligand and an organic solvent; acquiring a modified solution including a borate ester and the organic solvent; mixing the initial reaction mixture and the modified solution, and drying to acquire an initial product; performing a grinding, cold press and heat treatment to the initial product to obtain the solid electrolyte. In the preparation method provided by the present application, a B and O co-doped sulphide solid electrolyte can be obtained by modifying the sulphide solid electrolyte with the borate ester as a doping raw material. The ionic conductivity of the prepared sulphide solid electrolyte is significantly improved, which is also conducive to improvement of energy density of the all-solid-state batteries.

公开(公告)号：US20210234219A1

公开(公告)日：2021-07-29

申请号：US15733847

申请日：2020-03-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Kai WU ,  Xinxiang CHEN ,  Shoujun HUANG ,  Baisong CHEN ,  Huasheng SU ,  Guowei LI

IPC: H01M50/15 ,  H01M50/176 ,  H01M50/547 ,  H01M50/188 ,  H01M50/593 ,  H01M10/0525

Abstract: The present disclosure relates to a top cover assembly of a secondary battery and a secondary battery, wherein the top cover assembly includes a top cover plate, provided with a through hole; an electrode terminal, covering the through hole; an insulating plate, wherein at least part of the insulating plate is arranged on a side of the top cover plate away from the electrode terminal; a seal, wherein at least part of the seal is arranged between the top cover plate and the electrode terminal; and an insulator, wherein at least part of the insulator is arranged between the top cover plate and the insulating plate; wherein the insulator and the seal at least jointly enclose a side wall of the through hole and an area, close to the through hole, on an upper surface of the top cover plate.

公开(公告)号：US20210203000A1

公开(公告)日：2021-07-01

申请号：US17199256

申请日：2021-03-11

Applicant: Contemporary Amperex Technology Co., Limited

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

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

Abstract: This application provides a lithium-ion battery, a battery module, a battery pack, and an apparatus. The lithium-ion battery includes a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolyte. The positive electrode plate includes Li1+xNiaCobMe(1-a-b)O2-cYc, where −0.1≤x≤0.2, 0.8≤a

公开(公告)号：US20210202999A1

公开(公告)日：2021-07-01

申请号：US17196944

申请日：2021-03-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

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

Abstract: This application provides a nonaqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous solvent includes a nonaqueous solvent and a lithium slat. The nonaqueous solvent includes a carbonate solvent and a high oxidation potential solvent, and the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II. Based on a total weight of the nonaqueous solvent, a weight percentage of the high oxidation potential solvent is 10% to 60%. 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：US20210151771A1

公开(公告)日：2021-05-20

申请号：US17128124

申请日：2020-12-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Xin Liu ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/058 ,  H01M4/131 ,  H01M4/70 ,  H01M4/525

Abstract: The present disclosure provides a negative current collector (10), a negative electrode plate (20), an electrochemical device, and an apparatus. The negative current collector (10) includes a support layer, and a conductive layer (102) disposed on at least one of two opposite surfaces of the support layer (101) in a thickness direction of the support layer; wherein the support layer (101) has a smaller density than the conductive layer (102); the conductive layer (102) has a thickness D1 satisfying 300 nm≤D1≤2 μm, preferably 500 nm≤D1≤1.5 μm; and when the negative current collector (10) has a tensile strain of 1.5%, the conductive layer (102) has a sheet resistance growth rate T satisfying T≤5%.

公开(公告)号：US20210119220A1

公开(公告)日：2021-04-22

申请号：US17132530

申请日：2020-12-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Qisen Huang ,  Shiwen Wang

IPC: H01M4/66

Abstract: This application discloses a positive current collector, a positive electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The positive current collector includes a support layer, having two opposite surfaces in a thickness direction of the support layer; and an aluminum-based conductive layer, disposed on at least one of the two surfaces of the support layer. A thickness D1 of the aluminum-based conductive layer is 300 nm≤D1≤2 μm; a density of the aluminum-based conductive layer is 2.5 g/cm3 to 2.8 g/cm3; and when a tensile strain of the positive current collector is 2.5%, a sheet resistance growth rate T of the aluminum-based conductive layer is T≤10%. The positive current collector provided in this application has a relatively small weight and higher electrical performance, so that the electrochemical apparatus provides a higher weight energy density and higher electrochemical performance.

公开(公告)号：US20200127330A1

公开(公告)日：2020-04-23

申请号：US16388216

申请日：2017-07-18

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M10/0525 ,  H01M6/16 ,  H01G11/06 ,  H01G11/64 ,  C07D327/04 ,  C07D317/34

Abstract: An electrolyte and an electrochemical device, which relates to the field of energy storage materials. The electrolyte includes an additive A, an additive B and an additive C, the additive A selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 or Formula I-3, and combinations thereof, the additive B is at least one sulfonate compound, and the additive C is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate the surface activity of the positive electrode material, inhibit the oxidation of the electrolyte, and effectively reduce gas production of a battery, meanwhile the electrolyte can be also adsorbed catalytically active of the graphite surface to form a more stable SEI film, thereby effectively reducing side reactions

公开(公告)号：US20190305321A1

公开(公告)日：2019-10-03

申请号：US16366505

申请日：2019-03-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG ,  Xin LIU

IPC: H01M4/66 ,  H01M4/80

Abstract: The present disclosure relates to the technical 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 includes an insulation layer; and a conductive layer at least located on at least one surface of the insulation layer. The conductive layer has a room temperature thin film resistor of RS, where 0.01Ω/□≤RS≤0.15Ω/□. The current collector is provided with a plurality of holes penetrating through the insulation layer and the conductive layer.