公开(公告)号：US11069892B2

公开(公告)日：2021-07-20

申请号：US16355416

申请日：2019-03-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yisong Su ,  Yongsheng Guo ,  Chengdu Liang

IPC: H01M4/00 ,  H01M4/60 ,  H01M10/04 ,  H01M4/137 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

Abstract: A negative electrode active material, a negative electrode plate and a secondary battery. The negative electrode active material comprises a chelating resin and a metal ion. The chelating resin comprises a polymer skeleton and a chelating functional group. The chelating functional group is fixedly connected to the polymer skeleton via a chemical bond. The metal ion is connected with the chelating resin by an ionic bond and/or a coordinate bond via the chelating functional group. The chelating resin further comprises a free small molecular compound containing the chelating functional group. In the chelating resin, a mass percentage of the free small molecular compound containing the chelating functional is less than or equal to 1%. The metal ion is a divalent or multivalent metal ion. When the negative electrode active material is applied to the secondary battery, the secondary battery can achieve both high coulombic efficiency and high cycle stability.

公开(公告)号：US11024870B2

公开(公告)日：2021-06-01

申请号：US16267042

申请日：2019-02-04

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 and an active material layer. The current collector comprises an insulating layer and a first conducting layer provided on a surface of the insulating layer; the first conducting layer has a main portion and a protruding portion connected with the main portion, the main portion is coated with the active material layer, the protruding portion is not coated with the active material layer. The electrode plate further comprises a second conducting layer, the second conducting layer comprises a first portion, the first portion is provided on a surface of the protruding portion away from the insulating layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode plate.

公开(公告)号：US10985377B2

公开(公告)日：2021-04-20

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 ,  H01M4/70 ,  H01M4/02 ,  H01M4/13

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.

公开(公告)号：US10897063B2

公开(公告)日：2021-01-19

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 ,  H01G11/60 ,  H01G11/64 ,  H01M10/0525

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.

公开(公告)号：US20200083533A1

公开(公告)日：2020-03-12

申请号：US16684213

申请日：2019-11-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/58 ,  H01M10/0525 ,  H01M10/054 ,  C01C3/11 ,  C01C3/12

Abstract: The present disclosure provides a prussian blue analogue positive electrode material, a preparation method therefor and an electrochemical energy storage device. A molecular formula of the prussian blue analogue positive electrode material is AxMc[M′(CN)6]1-y(b-H2O)6y-dLd.□y.(i-H2O)z, where, A is one or more selected from a group consisting of alkali metal cation, alkaline-earth metal cation, Zn2+ and Al3+; M is a metal with the valence of 2+ or 3+; M′ is a metal with the valence of 2+ or 3+; b-H2O is a coordinated water; □ is a M′(CN)6 cavity; L is a neutral ligand, the neutral ligand is one or more selected from a group consisting of CH3CN, NH3, CO and C5H5N; i-H2O is an interstitial water; 0

公开(公告)号：US12113162B2

公开(公告)日：2024-10-08

申请号：US17556991

申请日：2021-12-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian Liu ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Quanguo Li

IPC: H01M10/04 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/625 ,  H01M50/258 ,  H01M50/509

CPC classification number: H01M10/04 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/625 ,  H01M50/258 ,  H01M50/509 ,  H01M2220/20

Abstract: The present application provides a battery and an apparatus. The battery includes: a first-type battery cell group and a second-type battery cell group which are connected in series, wherein the first-type battery cell group is composed of multiple first-type batteries connected in parallel, and the second type battery cell group is composed of at least one second type battery cell connected in parallel; the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, and the volume energy density of the first-type battery cell is less than that of the second-type battery cell; and the capacity Cap1 of the first-type battery cell group is greater than the capacity Cap2 of the second-type battery cell group, in which Cap1 is the sum of the capacities of the corresponding first-type battery cells, and Cap2 is the sum of the capacities of the corresponding second-type battery cells.

公开(公告)号：US12068468B2

公开(公告)日：2024-08-20

申请号：US17892621

申请日：2022-08-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Xiaofu Xu

IPC: H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M16/00 ,  H01M50/209 ,  H01M50/489 ,  H01M4/02

CPC classification number: H01M16/00 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M50/209 ,  H01M50/489 ,  H01M2004/028

Abstract: The application relates to a battery module, a manufacturing method and a manufacturing device thereof, a battery pack and a power consumption apparatus. The battery module includes a first-type battery cell and a second-type battery cell having different chemical systems and being electrically connected at least in series, where under the conditions of 25° C. and 100% state of charge (SOC), specific power density P2 of the second-type battery cell is higher than specific power density P1 of the first-type battery cell. Satisfying: 0.04≤(r1/m)/(r2/n)≤14, where, r1 and r2 are resistances per unit area of a positive electrode plate of the first-type battery cell and a positive electrode plate of the second-type battery cell respectively, and m and n are numbers of laminations of the positive electrode plate of the first-type battery cell and the positive electrode plate of the second-type battery cell.

公开(公告)号：US11973215B2

公开(公告)日：2024-04-30

申请号：US17059405

申请日：2020-07-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Yingjie Guan ,  Yuzhen Zhao ,  Yan Wen ,  Qisen Huang

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/386 ,  H01M4/387 ,  H01M4/587 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core material and a modified polymer coating layer coated on at least a part of the outer surface of the core material, the core material comprises one or more of silicon-based materials and tin based materials, the coating layer comprises carbon element and nitrogen element, wherein the nitrogen element is present in the negative active material in a mass percentage of 0.1%˜0.66%, and the coating layer comprises a —C═N-linkage.

公开(公告)号：US11961969B2

公开(公告)日：2024-04-16

申请号：US17196943

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

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2220/20 ,  H01M2300/0037

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 is 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：US11901555B2

公开(公告)日：2024-02-13

申请号：US18149672

申请日：2023-01-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Fajun Huang ,  Xiaofu Xu

IPC: H01M4/525 ,  H01M10/615 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267 ,  H01M10/617

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/615 ,  H01M10/617 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267

Abstract: A battery module, a battery pack, and an electric apparatus are provided. In some embodiments, the battery module includes a first type of cell and a second type of cell that are cells of different chemical systems, where the first type of cell includes n first cells, the second type of cell includes m second cells, n and m each are selected from an integer greater than 1, at least one of the first cells and at least one of the second cells are electrically connected in series, and the first cell and the second cell satisfy at least the following relationships: 0.08≤ΔRB/ΔRA≤3.50, and 0.10 mΩ/100 cycles≤ΔRA≤0.40 mΩ/100 cycles, where ΔRA is a discharge resistance growth rate of the first cell, and ΔRB is a discharge resistance growth rate of the second cell; and IMPB