公开(公告)号：US20240079600A1

公开(公告)日：2024-03-07

申请号：US18498072

申请日：2023-10-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping Zhang ,  Changlong Han ,  Chenghua Fu ,  Miaomiao Ren ,  Wen Chang ,  Peng Fan

IPC: H01M4/66 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M4/667 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/661 ,  H01M4/663 ,  H01M4/668 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028

Abstract: The present application provides a cathode plate, a secondary battery, a battery module, a battery pack, and an electric device. The cathode plate includes: a current collector, a conductive coating, and a cathode active layer. The conductive coating is arranged on at least one surface of the current collector. The conductive coating includes a conductive agent having a weight content of 20% to 50% and a binder having a weight content of 50%˜80%. The cathode active layer is arranged on a surface of the conductive coating away from the current collector, and a cathode active material in the cathode active layer is at least one of a lithium manganate-based cathode material, a ternary cathode material, and a quaternary cathode material.

公开(公告)号：US11777134B2

公开(公告)日：2023-10-03

申请号：US17516504

申请日：2021-11-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liye Li ,  Zeli Wu ,  Changlong Han ,  Chenghua Fu

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/131 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/386 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2004/027

Abstract: The application provides a secondary battery and a device including the same. The second battery includes: a negative electrode plate, the negative electrode plate including a negative active material; a separation film, the separation film including a base material and a coating arranged on at least one surface of the base material; and an electrolyte, the electrolyte including an organic solvent, where the negative active material includes a silicon-based material and a carbon material; thickness of the base material of the separation film is 7 μm˜12 μm; and the organic solvent includes ethylene carbonate, and a weight ratio of the ethylene carbonate in the organic solvent is ≤20%. The secondary battery and the device including the same, which are provided by the application, in the premise of having high energy density, can also have good high-temperature cycle performance, good high-temperature storage performance, and low low-temperature direct current resistance.

公开(公告)号：US20230127767A1

公开(公告)日：2023-04-27

申请号：US18087713

申请日：2022-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tingzhen Xie ,  Shaocong Ouyang ,  Chenghua Fu ,  Bo Wang ,  Yonghuang Ye

IPC: H01M50/446 ,  H01M10/0525 ,  H01M50/457

Abstract: This application relates to a separator with an organic-inorganic hybrid layer. By comprehensively adjusting an adaptive collocation relationship between the median diameter of the first inorganic particles and the median diameter of the second inorganic particles, and by controlling reasonable collocation between the microscale particles and the nanoscale particles, this application develops a separator that is capable of significantly reducing transition metal ions in an electrolytic solution and that is highly ion-permeable, thereby significantly improving the cycle performance and storage performance of lithium-ion batteries.

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：US10886565B2

公开(公告)日：2021-01-05

申请号：US16026990

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0568 ,  H01G11/62 ,  H01G11/64 ,  C07D207/06 ,  C07F9/6574 ,  C07D307/64 ,  C07D213/71 ,  C07D295/15 ,  C07F5/04 ,  C07D295/24 ,  H01M10/052 ,  H01G11/56 ,  H01M10/0525

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 multinitrile compound. The sulfonic ester cyclic quaternary ammonium salt and the multinitrile compound can form a dense and uniform passive film with high ionic conductivity on a surface of each of the positive electrode film and the negative electrode film, so as to prevent continuous oxidation and reduction reaction from occurring between the electrolyte and the positive electrode film and the negative electrode film and make the electrochemical energy storage device has excellent high temperature cycle performance and high temperature storage performance.

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：US20190036168A1

公开(公告)日：2019-01-31

申请号：US16026990

申请日：2018-07-03

Applicant: Contemporary Amperex Technology Co, Limited

Inventor： Xiaomei WANG ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0568 ,  H01G11/62 ,  H01G11/64 ,  C07D207/06 ,  C07D295/24 ,  C07D307/64 ,  C07D213/71 ,  C07D295/15 ,  C07F9/6574 ,  C07F5/04

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 multinitrile compound. The sulfonic ester cyclic quaternary ammonium salt and the multinitrile compound can form a dense and uniform passive film with high ionic conductivity on a surface of each of the positive electrode film and the negative electrode film, so as to prevent continuous oxidation and reduction reaction from occurring between the electrolyte and the positive electrode film and the negative electrode film and make the electrochemical energy storage device has excellent high temperature cycle 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：US20190006704A1

公开(公告)日：2019-01-03

申请号：US16000775

申请日：2018-06-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Feng Ju ,  Changlong Han ,  Shaojie Tian ,  Cui Zhang ,  Chenghua Fu

IPC: H01M10/0525 ,  H01M4/525 ,  H01M4/1391 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2/14

Abstract: The present disclosure provides an electrolyte and a lithium-ion battery, the electrolyte comprises an electrolyte salt, an organic solvent and an additive. The organic solvent comprises ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate. The additive comprises a boron-based or phosphorus-based lithium oxalate, a fluorinated lithium phosphate and one or two selected from a group consisting of vinylene carbonate and fluoroethylene carbonate. The electrolyte of the present disclosure can improve the cycle performances under both room temperature fast charging and high temperature fast charging, the power performances under both room temperature and low temperature and the storage performance under high temperature of the lithium-ion battery at the same time.