公开(公告)号：US11909000B2

公开(公告)日：2024-02-20

申请号：US17820944

申请日：2022-08-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang Peng ,  Peipei Chen ,  Hailin Zou ,  Chengdu Liang

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

CPC classification number: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025

Abstract: A lithium-ion secondary battery is provided, where an electrolyte solution of the lithium-ion secondary battery comprises a highly heat-stable salt (My+)x/yR1(SO2N−)xSO2R2, where the My+ is a metal ion, R1 and R2 are each independently a fluorine atom, an alkyl with 1-20 carbon atoms, a fluoroalkyl with 1-20 carbon atoms, or a fluoroalkoxy with 1-20 carton atoms, x is 1, 2, or 3, and y is 1, 2, or 3. A mass percent of the salt in the electrolyte solution is set as k2%; a temperature rise coefficient k1 of the positive electrode sheet satisfies 2.5≤k1≤32, where k1=Cw/Mc, Cw is a positive electrode material load per unit area (mg/cm2) on the surface of any side of the positive electrode current collector on which a positive electrode material layer is loaded, and Mc is a carbon content (%) of the positive electrode material layer; and the lithium-ion secondary battery satisfies 0.34≤k2/k1≤8.

公开(公告)号：US11888116B2

公开(公告)日：2024-01-30

申请号：US17930420

申请日：2022-09-08

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Peipei Chen ,  Chang Peng ,  Hailin Zou

IPC: H01M10/0525 ,  H01M10/0567 ,  H01M50/534 ,  H01M10/0568

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/534 ,  H01M2220/20

Abstract: The present disclosure provides a fast charge long lifetime secondary battery, a battery module, a battery pack, and a power consumption device. In some embodiments, a secondary battery, comprising an electrode assembly and an electrolytic solution, the electrode assembly comprises a positive electrode plate, a negative electrode plate, and a separator, the positive electrode plate comprises a positive electrode tab, and the negative electrode plate comprises a negative electrode tab are provided. In those embodiments, the positive electrode tab has the following temperature rise coefficient:




α
=

C

1
⁢
0
⁢


S
⁢
1








where S1 is a total cross-sectional area of the positive electrode tab, in unit of mm2; C is capacity of the electrode assembly, in unit of A·h; the electrolytic solution contains a heat stable salt and an additive that inhibits decomposition of the lithium salt.

公开(公告)号：US20220123368A1

公开(公告)日：2022-04-21

申请号：US17566699

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Peipei Chen ,  Chenghua Fu ,  Chang Peng

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M4/60

Abstract: The present application relates to a secondary 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 electrolyte solution, the negative electrode plate including a negative electrode current collector and a negative electrode active material layer provided on at least one side of the negative electrode current collector, and the electrolyte solution including an organic solvent and a lithium salt, wherein the negative electrode active material comprises a core structure and a polymer network coating layer coated on at least a part of the surface of the core structure.

公开(公告)号：US20240274810A1

公开(公告)日：2024-08-15

申请号：US18608952

申请日：2024-03-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Limei Zhang ,  Peipei Chen ,  Chang Peng ,  Jiao Liu

IPC: H01M4/505 ,  C01B25/45 ,  H01M4/02 ,  H01M4/1315 ,  H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M4/505 ,  C01B25/45 ,  H01M4/1315 ,  H01M4/133 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0568 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A secondary battery, a battery module, a battery pack, and an electric device. The secondary battery includes a cathode piece and a non-aqueous electrolyte, in which, the cathode piece includes a cathode active material, and the cathode active material has a chemical formula represented by LiaAxMn1-yByP1-zCzO4-nDn; the non-aqueous electrolyte includes a first lithium salt and a first additive, optionally, the first lithium salt is one or more selected from the group consisting of LiN(CmF2m+1SO2)(CnF2n+1SO2) and Li(FSO2)2N, m and n represent positive integers; the first additive includes one or more of a compound represented by Formula 1. Using the cathode active material and/or a combination of the cathode active material and the non-aqueous electrolyte improves the rate performance, cycle performance, and high temperature stability of the lithium manganese phosphate secondary battery.

公开(公告)号：US20230091618A1

公开(公告)日：2023-03-23

申请号：US17930420

申请日：2022-09-08

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Peipei Chen ,  Chang Peng ,  Hailin Zou

IPC: H01M10/0567 ,  H01M50/534 ,  H01M10/0568 ,  H01M10/0525

Abstract: The present disclosure provides a fast charge long lifetime secondary battery, a battery module, a battery pack, and a power consumption device. Particularly, the present disclosure provides a secondary battery, comprising an electrode assembly and an electrolytic solution, the electrode assembly comprises a positive electrode plate, a negative electrode plate, and a separator, the positive electrode plate comprises a positive electrode tab, and the negative electrode plate comprises a negative electrode tab, wherein the positive electrode tab has the following temperature rise coefficient: α = C 1 ⁢ 0 ⁢ S ⁢ 1 where S1 is a total cross-sectional area of the positive electrode tab, in unit of mm2; C is capacity of the electrode assembly, in unit of A·h; the electrolytic solution contains a heat stable salt and an additive that inhibits decomposition of the lithium salt.