公开(公告)号：US20240396036A1

公开(公告)日：2024-11-28

申请号：US18789723

申请日：2024-07-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jie Guo ,  Zeli Wu ,  Changlong Han ,  Guan Wang ,  Bin Jiang

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate and an electrolytic solution; the positive electrode plate including a positive electrode active material; the electrolytic solution includes a boron-containing salt; a mass percentage of the boron-containing salt based on the total mass of the electrolytic solution is denoted as A %; an upper-limit potential of the positive electrode active material with respect to lithium metal is denoted as V1 (V); and the secondary battery satisfies: 0 4.1; optionally, 0

公开(公告)号：US20230216089A1

公开(公告)日：2023-07-06

申请号：US18155059

申请日：2023-01-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jie Guo ,  Changlong Han ,  Zeli Wu ,  Bin Jiang

IPC: H01M10/0569 ,  H01M4/587 ,  H01M4/36 ,  H01M4/38 ,  H01M4/133

CPC classification number: H01M10/0569 ,  H01M4/587 ,  H01M4/364 ,  H01M4/386 ,  H01M4/133 ,  H01M2300/004 ,  H01M2004/027

Abstract: A secondary battery, and a battery module, a battery pack, and an electric apparatus containing the same are provided. The secondary battery includes: an electrolyte having a specific percentage of a low-viscosity solvent, a specific percentage of a high-dielectric-constant solvent, and a negative electrode having a negative electrode active material layer, and the secondary battery satisfies the relational expression:





1
×

10

-
4


⁢
4

≤


B
×
C
×
P



 
OI

×
CW


≤

1
×

10

-
3







where B is the percentage of the low-viscosity solvent in total solvent in the electrolyte by mass; C is a percentage of an electrolyte salt in the electrolyte by mass; P is a porosity of the negative electrode active material layer; CW is a coating weight of the negative electrode active material layer, measured in mg/cm2; and OI is an orientation index of the negative electrode active material layer.

公开(公告)号：US20250140941A1

公开(公告)日：2025-05-01

申请号：US18800159

申请日：2024-08-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Bin Jiang ,  Jie Guo

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes a lithium salt, where the lithium salt includes lithium hexafluorophosphate, and based on a total mass of the electrolyte, a mass proportion of the lithium hexafluorophosphate is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

公开(公告)号：US20250140895A1

公开(公告)日：2025-05-01

申请号：US18800152

申请日：2024-08-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Bin Jiang ,  Jie Guo

IPC: H01M10/0525 ,  C30B29/22 ,  H01M4/36 ,  H01M4/48 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes lithium salt, the lithium salt includes lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

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：US20220123366A1

公开(公告)日：2022-04-21

申请号：US17402672

申请日：2021-08-16

Applicant: Contemporary Amperex Technology Co., Limited

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

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

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：US20220102757A1

公开(公告)日：2022-03-31

申请号：US17511384

申请日：2021-10-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Chenghua Fu ,  Peipei Chen ,  Bin Jiang

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/0569 ,  H01M10/0585 ,  H01M4/505 ,  H01M4/525

Abstract: This application provides an electrolyte, a lithium-ion battery, and an apparatus containing the lithium-ion battery. The electrolyte includes a lithium salt, an organic solvent, and an additive. The additive includes a sulfur-containing compound and lithium difluorophosphate, and a reduction potential of the sulfur-containing compound is higher than a reduction potential of lithium difluorophosphate. Because the reduction potential of the sulfur-containing compound is higher than the reduction potential of lithium difluorophosphate, the sulfur-containing compound can form a low-impedance SEI film on a surface of a negative electrode prior to lithium difluorophosphate, allowing more lithium difluorophosphate to form a passivation film with good thermostability on a surface of a positive electrode, so that the lithium-ion battery has good high-temperature storage performance and cycling performance, without suffering performance deterioration such as lithium precipitation.

公开(公告)号：US10763546B2

公开(公告)日：2020-09-01

申请号：US16027000

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Bin Jiang ,  Chenghua Fu ,  Jiqiong Liu ,  Yan Zhou ,  Jianwei Zhu ,  Changlong Han ,  Wenhao Liu

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/052 ,  H01G11/64 ,  H01G11/56 ,  H01M4/583 ,  H01M4/525 ,  H01M10/058 ,  H01M4/505 ,  H01M10/44 ,  H01M4/02 ,  H01G11/06

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 fluorocarbon surfactant. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the fluorocarbon surfactant, a dense, uniform and stable passive film can form on a surface of each of a positive electrode film and a negative electrode film of the electrochemical energy storage device, and infiltration capability of the electrolyte on each of the passive film of the positive electrode film and the negative electrode film can be increased at the same time, so as to decrease electrode polarization inside the electrochemical energy storage device and make the electrochemical energy storage device have excellent rate capability, low temperature discharge performance and high temperature storage performance.

公开(公告)号：US20190036161A1

公开(公告)日：2019-01-31

申请号：US16027000

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei WANG ,  Bin Jiang ,  Chenghua Fu ,  Jiqiong Liu ,  Yan Zhou ,  Jianwei Zhu ,  Changlong Han ,  Wenhao Liu

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M4/583 ,  H01M4/505 ,  H01M4/525 ,  H01M10/058 ,  H01M10/44

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 fluorocarbon surfactant. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the fluorocarbon surfactant, a dense, uniform and stable passive film can form on a surface of each of a positive electrode film and a negative electrode film of the electrochemical energy storage device, and infiltration capability of the electrolyte on each of the passive film of the positive electrode film and the negative electrode film can be increased at the same time, so as to decrease electrode polarization inside the electrochemical energy storage device and make the electrochemical energy storage device have excellent rate capability, low temperature discharge performance and high temperature storage performance.

公开(公告)号：US20240170726A1

公开(公告)日：2024-05-23

申请号：US18426355

申请日：2024-01-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Huiling Chen ,  Changlong Han ,  Bin Jiang ,  Qian Liu ,  Jianfu He ,  Jingxuan Sun ,  Lei Huang

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028

Abstract: This application provides a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains the non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a tetrafluoroborate anion BF4−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.1 to 1250 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.