公开(公告)号：US20230197959A1

公开(公告)日：2023-06-22

申请号：US18066288

申请日：2022-12-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Miaomiao Dong ,  Shaocong Ouyang ,  Chenghua Fu ,  Changfeng Bie

IPC: H01M4/62 ,  H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M4/36 ,  H01M4/136 ,  H01M4/131 ,  H01M10/0525

CPC classification number: H01M4/62 ,  H01M4/131 ,  H01M4/136 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode composite material for a lithium-ion secondary battery is provided. In some embodiments, the positive electrode composite material for a lithium-ion secondary battery comprises: a positive electrode active material selected from at least one of a lithium iron phosphate material and a nickel cobalt lithium manganate material; and at least one of compounds represented by AaMb(PO4)cXd, wherein A is selected from at least one of Li, Na, K, and Ca, M is selected from at least one of V and Mn, X is selected from any one of halogen elements, a, b, and c are each independently selected from an integer from 1 to 6, and d is selected from an integer from 0 to 3.

公开(公告)号：US20220109190A1

公开(公告)日：2022-04-07

申请号：US17550934

申请日：2021-12-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Zeli Wu ,  Peipei Chen ,  Chenghua Fu

IPC: H01M10/0568 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38 ,  H01M4/587

Abstract: This application provides a secondary battery and an apparatus containing the secondary battery. The secondary battery includes an electrolytic solution. The electrolytic solution includes an electrolyte salt and an organic solvent. The electrolyte salt includes lithium bis(fluorosulfonyl)imide (LiFSI) and lithium hexafluorophosphate (LiPF6). A volumetric molar concentration of the LiFSI in the electrolytic solution is 0.8 mol/L-1.2 mol/L; and a volumetric molar concentration of the LiPF6 in the electrolytic solution is 0.15 mol/L-0.4 mol/L. The organic solvent includes ethylene carbonate (EC), and mass percent of the EC in the organic solvent is less than or equal to 20%.

公开(公告)号：US11239498B2

公开(公告)日：2022-02-01

申请号：US16390816

申请日：2019-04-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianwei Zhu ,  Chenghua Fu ,  Xiaomei Wang

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/134 ,  H01M4/02

Abstract: The present disclosure relates to the technical field of lithium-ion battery, and particularly, to an electrolytic solution and a lithium-ion battery including the electrolytic solution. The electrolytic solution includes additives, and the additives include an additive A and an additive B. The additive A forms a film on the surface of the positive electrode and effectively prevents interface side reactions at the positive electrode. Comparing with the additive A, the additive B is preferentially reduced to form a film at the negative electrode, avoiding an increase in impedance and deterioration of cycling dynamic performance, etc., caused by film formation of the additive A on the negative electrode. The combination of the additive A and additive B imparts the battery with a reduced gas production, a higher capacity retention rate and a lower impedance at high temperature.

公开(公告)号：US10686221B2

公开(公告)日：2020-06-16

申请号：US16027009

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01G11/64 ,  H01M10/0565 ,  H01M4/525 ,  H01M4/583 ,  H01M10/48 ,  H01M4/505 ,  H01M4/02

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a dioxide heterocyclic compound. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the dioxide heterocyclic compound, a dense, uniform and stable passive film on a surface of each of the positive electrode film and the negative electrode film of the electrochemical energy storage device, thereby reducing the contact between the positive, negative electrode active materials and the electrolyte, thus avoiding the occurrence of continuous oxidation and reduction reaction of the electrolyte on the surface of each of the positive electrode film and the negative electrode film, so as to make the electrochemical energy storage device has excellent high temperature storage performance and high temperature cycle performance.

公开(公告)号：US20190036169A1

公开(公告)日：2019-01-31

申请号：US16027009

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0565 ,  H01M4/525 ,  H01M4/505 ,  H01M4/583 ,  H01M10/48

CPC classification number: H01M10/0567 ,  H01G11/64 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0565 ,  H01M10/0569 ,  H01M10/48 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0082

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a dioxide heterocyclic compound. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the dioxide heterocyclic compound, a dense, uniform and stable passive film on a surface of each of the positive electrode film and the negative electrode film of the electrochemical energy storage device, thereby reducing the contact between the positive, negative electrode active materials and the electrolyte, thus avoiding the occurrence of continuous oxidation and reduction reaction of the electrolyte on the surface of each of the positive electrode film and the negative electrode film, so as to make the electrochemical energy storage device has excellent high temperature storage performance and high temperature cycle performance.

公开(公告)号：US12100813B2

公开(公告)日：2024-09-24

申请号：US18208898

申请日：2023-06-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bin Jiang ,  Changlong Han ,  Chenghua Fu ,  Rui Shen ,  Yuanyuan Li

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0037

Abstract: The present application provides a secondary battery, an electrolyte, and an apparatus including the secondary battery. The secondary battery of the present application includes an electrolyte, characterized in that the electrolyte includes an organic solvent, and the organic solvent includes a cyclic carbonate and a chain carbonate; the mass ratio of the cyclic carbonate and the chain carbonate is from 25:75 to 32:68; the chain carbonate includes dimethyl carbonate; the mass percentage of the dimethyl carbonate in the chain carbonate is greater than or equal to 9 wt % and less than 50 wt %; wherein based on the total mass of the organic solvent, the mass percentage of a carboxylic acid ester is less than 5 wt %. The secondary battery of the present application can simultaneously obtain excellent low-temperature power, long service life and cycle performance.

公开(公告)号：US12068457B2

公开(公告)日：2024-08-20

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 ,  H01M4/1391 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/1391 ,  H01M10/0568 ,  H01M2220/20 ,  H01M2300/0022 ,  H01M2300/0034 ,  H01M2300/0037

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：US12046719B2

公开(公告)日：2024-07-23

申请号：US18118756

申请日：2023-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaocong Ouyang ,  Chenghua Fu ,  Baoyun Xu ,  Miaomiao Dong ,  Yonghuang Ye

IPC: H01M10/0585 ,  H01M4/133 ,  H01M10/44 ,  H01M50/204 ,  H01M4/02

CPC classification number: H01M10/0585 ,  H01M4/133 ,  H01M10/441 ,  H01M50/204 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: A battery pack may include a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more, wherein the second battery cell may have a discharge power at −20° C. greater than that of the first battery cell, the difference in discharge power at −20° C. between the second battery cells and the first battery cells being ≥10 W; the percentage by number of the first battery cells in the battery cells comprised in area A may be 20% to 100%, and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.

公开(公告)号：US12021232B2

公开(公告)日：2024-06-25

申请号：US17821819

申请日：2022-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shaocong Ouyang ,  Chenghua Fu ,  Tingzhen Xie ,  Dong Pan ,  Yonghuang Ye

IPC: H01M4/505 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/0416 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present disclosure provides a lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer, where the cladding layer comprises an organic bonding material, one or more A-type salts, and one or more B-type salts. The lithium manganate positive electrode active material of the present disclosure significantly reduces the content of transition metal manganese ions within a battery through combined action of the organic bonding material, the A-type salts, and the B-type salts, thereby slowing down the decomposition and consumption of the SEI film (solid electrolyte interphase) by transition metal manganese, and improving the capacity retention rate and impedance performance of the battery.

公开(公告)号：US11961961B2

公开(公告)日：2024-04-16

申请号：US17730247

申请日：2022-04-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changlong Han ,  Zeli Wu ,  Chenghua Fu

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/36 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0567 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/366 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0567 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/30 ,  H01M2300/002

Abstract: The present application provides a secondary battery and an apparatus containing the same. The secondary battery includes: a negative electrode plate including a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector, the negative electrode film including a negative active material; and an electrolyte including an electrolyte salt, an organic solvent, and an additive; wherein the negative active material includes a silicon-based material; the additive includes an additive A and an additive B; the additive A is selected from one or more of the compounds shown in Formula 1; the additive B is selected from one or more in the compound shown in Formula 2; the additive B has melting point of below or equal to 5° C.