公开(公告)号：US20220013856A1

公开(公告)日：2022-01-13

申请号：US17113067

申请日：2020-12-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuqun ZENG ,  Xiaobo CHEN ,  Peng WANG ,  Yao LI ,  Chengdu LIANG ,  Yongshou LIN

IPC: H01M50/342 ,  H01M10/04 ,  H01M10/6556 ,  H01M10/0525 ,  H01M10/625

Abstract: The present application discloses a battery including a battery cell, a thermal management component, an avoidance chamber and a collection chamber. The battery cell includes a pressure relief mechanism; the thermal management component is configured to adjust a temperature of the battery cell; the avoidance chamber is configured to provide a space allowing the pressure relief mechanism to be actuated; and the collection chamber is configured to collect emissions from the battery cell when the pressure relief mechanism is actuated. The thermal management component is configured such that emissions are capable of passing through the thermal management component when the pressure relief mechanism is actuated, and then entering the collection chamber through the avoidance chamber. Therefore, the pressure relief mechanism may not need to be provided on a side of an electrode terminal of the battery cell and emissions relieved by the pressure relief mechanism may be collected.

公开(公告)号：US20220002160A1

公开(公告)日：2022-01-06

申请号：US17475365

申请日：2021-09-15

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: C01B32/205 ,  H01M10/0525

Abstract: The present application discloses a composite graphite material and a method for preparing the same, a secondary battery, and an apparatus. The composite graphite material includes a core material and a coating layer that coats at least a portion of the surface of the core material, the core material including graphite, and the coating layer including a coating material containing a cyclic structure moiety, wherein the composite graphite material has a weight-loss rate of from 0.1% to 0.55% when the composite graphite material is heated in an atmosphere of an inert non-oxidative gas at a temperature rising from 40° C. to 800° C. The composite graphite material can enhance the gram capability and reduce the expansion rate of an electrode plate, and more preferably, can improve the cycle performance and kinetic performance of a battery as well.

公开(公告)号：US20210391572A1

公开(公告)日：2021-12-16

申请号：US17460723

申请日：2021-08-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuqun ZENG ,  Chengdu LIANG ,  Chuanmiao YAN ,  Jinhua LIU

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/48 ,  H01M4/62 ,  H01M4/134

Abstract: A negative electrode plate, a secondary battery and an apparatus thereof are provided in the present application. The negative electrode plate includes a negative electrode current collector and a negative membrane disposed on the negative electrode current collector, and the negative membrane includes a first coating layer and a second coating layer. The first coating layer is located on an outermost layer of the negative membrane and includes a first negative active material including a silicon-based material and a carbon material, and in the first coating layer, a mass percentage of the silicon-based material is 0.5% to 10%. The second coating layer is disposed between the first coating layer and the negative electrode current collector and includes a second negative active material including a silicon-based material and a carbon material, and in the second coating layer, a mass percentage of the silicon-based material is 5%-50%.

公开(公告)号：US20210203001A1

公开(公告)日：2021-07-01

申请号：US17199265

申请日：2021-03-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

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

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, the lithium salt is a mixed lithium salt formed by LiPF6 and LiN(FSO2)2, and the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II. 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：US20210194060A1

公开(公告)日：2021-06-24

申请号：US17196797

申请日：2021-03-09

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/42

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. The nonaqueous solvent includes a carbonate solvent and a high oxidation potential solvent, and the additive is a fluorinated cyclic carbonate. The carbonate solvent is a linear carbonate, or a mixture of linear carbonate and cyclic carbonate, the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II, and the fluorinated cyclic carbonate is selected from 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：US20210143477A1

公开(公告)日：2021-05-13

申请号：US17146758

申请日：2021-01-12

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04

Abstract: The present 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 sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.

公开(公告)号：US20210143476A1

公开(公告)日：2021-05-13

申请号：US17144517

申请日：2021-01-08

Applicant: Contemporary Amperex Technology Co., Limited

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

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

Abstract: The present 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 sheet, a negative electrode sheet and a separation film. The positive active material in the positive electrode sheet includes Lix1Coy1M1-y1 O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, and M is selected from one 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 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 an aliphatic dinitrile or polynitrile compound with a relatively high oxidation potential. The lithium-ion battery of the present application has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US20210135289A1

公开(公告)日：2021-05-06

申请号：US17128581

申请日：2020-12-21

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/525 ,  C07D295/15 ,  C07D239/04 ,  C07D403/04 ,  C07D241/04 ,  C07D251/04

Abstract: The present application provides a lithium-ion battery and an apparatus, and 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 of the positive electrode sheet includes Lix1Coy1M1-yO2-z1Qz1, 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 electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A. The additive A 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：US20210135218A1

公开(公告)日：2021-05-06

申请号：US17144455

申请日：2021-01-08

Applicant: Contemporary Amperex Technology Co., Limited

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

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

Abstract: The present application provides 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 addictive 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：US20200185772A1

公开(公告)日：2020-06-11

申请号：US16342400

申请日：2017-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  H01G11/06 ,  H01G11/64 ,  H01M10/0525 ,  H01M6/16

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 halogenated 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.