公开(公告)号：US20230064435A1

公开(公告)日：2023-03-02

申请号：US17879863

申请日：2022-08-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping ZHANG ,  Changlong HAN

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  C07F9/576 ,  H01M4/04 ,  C07C25/13 ,  H01M10/0567

Abstract: This application relates to a lithium-ion secondary battery. A positive electrode plate of the lithium-ion secondary battery includes a positive electrode active substance LiNixCoyNzM1-x-y-zO2, with N selected from Mn and Al, and M selected from any one of Co, Ni, Mn, Mg, Cu, Zn, Al, Sn, B, Ga, Cr, Sr, V, and Ti, where 0.5≤x

公开(公告)号：US20240274878A1

公开(公告)日：2024-08-15

申请号：US18512056

申请日：2023-11-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli WU ,  Changlong HAN ,  Huiling CHEN ,  Jie GUO ,  Lei HUANG ,  Cuiping ZHANG ,  Wenhao LIU

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/42

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2010/4292 ,  H01M2300/004

Abstract: The present application refers to a secondary battery, a battery module, a battery pack and an electrical device. The secondary battery includes a battery housing, an electrode assembly contained in the battery housing and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a compound represented by Formula I and based on the total mass of the non-aqueous electrolyte, the compound represented by Formula I is present in an amount of A1 by mass; the secondary battery has a group margin B and the secondary battery satisfies: B is from 0.88 to 0.99, B/A1 is from 0.5 to 45. This application can provide a secondary battery having both high group margin design and high safety performance, and meanwhile having good cycle performance and kinetic performance.

公开(公告)号：US20240014445A1

公开(公告)日：2024-01-11

申请号：US18468906

申请日：2023-09-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli WU ,  Changlong HAN ,  Huiling CHEN ,  Jie GUO ,  Lei HUANG ,  Cuiping ZHANG ,  Wenhao LIU

IPC: H01M10/0568 ,  H01M4/36 ,  H01M4/66 ,  H01M10/0567

CPC classification number: H01M10/0568 ,  H01M4/366 ,  H01M4/661 ,  H01M10/0567 ,  H01M2220/20 ,  H01M2300/0051 ,  H01M2004/027

Abstract: A secondary battery, a battery module, a battery pack and an electrical device containing the same are described. The secondary battery comprises a positive electrode plate, a negative electrode plate, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte comprises a compound shown in Formula 1, based on the total mass of the non-aqueous electrolyte, the compound shown in Formula 1 is present in an amount of A1% by mass; the negative electrode collector has a thickness of H1 μm, the negative active material layer has a compaction density of P1 g/cm3, and the secondary battery satisfies: H1 is from 3 to 7, A1/H1 is from 0.003 to 0.40 and P1/A1 is from 1 to 90. The secondary battery with a thinned negative electrode collector has low cost, high energy density, high power performance and high safety performance at the same time.

公开(公告)号：US20240178454A1

公开(公告)日：2024-05-30

申请号：US18408488

申请日：2024-01-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping ZHANG ,  Changlong HAN ,  Bin JIANG ,  Zeli WU ,  Lei HUANG

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2300/0034 ,  H01M2300/004

Abstract: An electrolytic solution includes a solvent. The solvent includes a compound represented by Formula (1) below, in which R1 is a fluorinated C1 to C6 alkyl or a fluorinated C2 to C6 alkenyl, and R2 and R3 each independently are a hydrogen atom, a fluorine atom, or a fluorinated C1 to C6 alkyl. The solvent further includes ethylene carbonate. Based on a total weight of the solvent, a weight percent of the ethylene carbonate is less than or equal to 25 wt %.

公开(公告)号：US20230117520A1

公开(公告)日：2023-04-20

申请号：US18072720

申请日：2022-12-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei HUANG ,  Changlong HAN ,  Zeli WU ,  Cuiping ZHANG

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0568 ,  H01M4/58

Abstract: The present application provides an electrolytic solution, a secondary battery, and a power consumption apparatus. The electrolytic solution may include a solvent and an additive; the solvent may include a compound of formula I, and a mass percentage of the compound of formula I in the solvent may be 35% or more; in formula I, R1 and R2 are each independently selected from any one of a hydrogen atom, a C1-C3 chain alkyl group, and a C2-C3 alkenyl group; and the additive may include a compound of formula II, and in formula II, R3, R4, and R5 are each independently selected from any one of a hydrogen atom, a fluorine atom, a phenyl group, a cyano group, a C1-C6 chain alkyl group, a C3-C6 cyclic alkyl group, and a C2-C6 alkenyl group.

公开(公告)号：US20240372158A1

公开(公告)日：2024-11-07

申请号：US18773031

申请日：2024-07-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huiling CHEN ,  Changlong HAN ,  Zeli WU ,  Jie GUO ,  Bin JIANG ,  Lei HUANG ,  Cuiping ZHANG

IPC: H01M10/42 ,  H01M10/056

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate including a positive electrode film layer, a negative electrode plate including a negative electrode film layer, an electrolytic solution, and a solid electrolyte; the solid electrolyte is disposed on a surface of the positive and/or negative electrode film layer and includes a polymer matrix and a first additive, and the first additive is configured to form an interface film on the surface of the positive and/or negative electrode film layer, where a mass percentage of the polymer matrix relative to a total mass of the solid electrolyte is denoted as A %; and a mass percentage of the first additive relative to the total mass of the solid electrolyte is denoted as B %, and the secondary battery satisfies 0.1≤B/A≤19.

公开(公告)号：US20240372147A1

公开(公告)日：2024-11-07

申请号：US18770229

申请日：2024-07-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huiling CHEN ,  Zeli WU ,  Changlong HAN ,  Jie GUO ,  Cuiping ZHANG ,  Lei HUANG ,  Wenhao LIU

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/42

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate, a negative electrode plate and an electrolytic solution, the negative electrode plate including a negative electrode film layer containing a negative electrode active material; and the electrolytic solution including a boron-containing lithium salt, the boron-containing lithium salt being configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as A in Ah, a mass of the electrolytic solution is denoted as B in g, a mass percentage of the boron-containing lithium salt relative to a total mass of the electrolytic solution is denoted as C %; and the secondary battery satisfies: 1≤B/A≤5, 5×10−6≤B×C %/A≤0.25.

公开(公告)号：US20240105942A1

公开(公告)日：2024-03-28

申请号：US18527410

申请日：2023-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping ZHANG ,  Changlong HAN ,  Peng FAN

IPC: H01M4/583 ,  H01M10/0568 ,  H01M50/209

CPC classification number: H01M4/583 ,  H01M10/0568 ,  H01M50/209 ,  H01M2004/021

Abstract: Provided are a secondary battery, a battery module, a battery pack and an electric device. The secondary battery includes an electrode assembly and an electrolytic solution configured to infiltrate the electrode assembly, wherein the electrode assembly includes a negative electrode plate, a separation film and a positive electrode plate, and the negative electrode plate includes a negative electrode current collector and a negative electrode material layer located on at least one surface of the negative electrode current collector; and by setting a tortuosity of the negative electrode plate as τ, the τ satisfies Formula I below:


τ=0.5(ε)−α  Formula I



where, ε is a porosity of the negative electrode material layer, and α is a Bruggeman index of the negative electrode material layer, and
the τ and a conductivity σ of the electrolytic solution satisfy Formula II below:






(2τ)0.5+6≤σ≤(2τ)0.5+10  Formula II.

Therefore, the secondary battery has an excellent fast-charging performance.

公开(公告)号：US20230361352A1

公开(公告)日：2023-11-09

申请号：US18347184

申请日：2023-07-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli WU ,  Changlong HAN ,  Cuiping ZHANG ,  Bin JIANG ,  Zhiyong AI ,  Lei HUANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/525

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/525 ,  H01M2004/028

Abstract: The present application discloses a lithium-ion battery, which has a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte solution comprising a lithium salt and a solvent, wherein based on the total weight of the electrolyte solution, the percentage by mass of the lithium salt in the electrolyte solution is a %, and the lithium ion battery satisfies 5≤a≤10; and the load on single side of the negative electrode sheet is W grams per 1540.25 mm2, and a and W satisfy 25≤a/W≤50; and the solvent comprises dimethyl carbonate. The lithium ion battery has good safety and high-temperature cycling performance, and also has good kinetic performance.

公开(公告)号：US20210119260A1

公开(公告)日：2021-04-22

申请号：US17131803

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Cuiping ZHANG ,  Ming ZHANG ,  Peipei CHEN ,  Hailin ZOU ,  Liye LI

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/525 ,  C07C311/48 ,  C07D327/00

Abstract: The present application relates to a lithium ion battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolytic solution, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer provided on at least one side of the positive electrode current collector, and the electrolytic solution including an organic solvent, a lithium salt and an additive, wherein the lithium salt comprises a primary lithium salt, the primary lithium salt is a first compound in an amount of 30% or more relative to the total molar amount of the lithium salt, and the first compound has a structure represented by the following formula I, and wherein the additive comprises a second compound represented by the following formula II.