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：US11923536B2

公开(公告)日：2024-03-05

申请号：US17345109

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bo Cheng ,  Changlong Han

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M50/431 ,  H01M50/446

CPC classification number: H01M4/366 ,  H01M4/38 ,  H01M4/48 ,  H01M50/431 ,  H01M50/446 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/10 ,  H01M2220/20

Abstract: The present application relates to a composite material with a core-shell structure for battery, wherein the core is made of a core material including metallic copper or a copper-containing compound; the shell is made of a shell material including at least one of silicon dioxide and titanium dioxide; and the core material has an average particle size D50 of 0.01 μm-5 μm, optionally 0.1 μm-3 μm, and more optionally 0.1 μm-2 μm. The present application also relates to secondary battery containing the composite material, a battery module, a battery pack, and an apparatus.

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：US20230299356A1

公开(公告)日：2023-09-21

申请号：US18321794

申请日：2023-05-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zeli Wu ,  Changlong Han ,  Lei Huang ,  Zhiyong Ai

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

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2220/20 ,  H01M2300/0042 ,  H01M2300/0051

Abstract: A method for preparing an SEI (solid electrolyte interphase)-like film component additive, and an electrolyte solution comprising the SEI-like film component additive prepared by the method are provided. Compared with a conventional electrolyte solution (electrolyte solution without adding SEI-like film component additive), the electrolyte solution of the present application can prevent the loss of the effective ingredients caused by the dissolution of the SEI film on the negative electrode in the electrolyte solution during battery storage and use, and the electrolyte solution of the present application can also timely supplement the lost or damaged SEI film with effective ingredients, so that the damaged parts of the SEI film are quickly and timely supplemented.

公开(公告)号：US20230275204A1

公开(公告)日：2023-08-31

申请号：US18314120

申请日：2023-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping Zhang ,  Changlong Han ,  Zeli Wu ,  Lei Huang

IPC: H01M4/04 ,  H01M50/204 ,  H01M50/46 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567

CPC classification number: H01M4/0404 ,  H01M50/204 ,  H01M50/46 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567 ,  H01M2004/021

Abstract: A secondary battery, including a positive electrode, a negative electrode, a separator sandwiched between the positive electrode and the negative electrode, and an electrolyte are provided. In some embodiments, the positive electrode includes a positive electrode current collector having two main surfaces, the negative electrode includes a negative electrode current collector having two main surfaces, and at least one of the positive electrode current collector and the negative electrode current collector includes at least one recess structure extending from at least one main surface into interior of the current collector, where the recess structure has a recess depth h1 in microns, the electrolyte has a conductivity σ in Siemens/meter, and numerically, σ and h1 satisfy the following relationship: 8tanhh1+0.2h1≤σ≤10tanh(h1)2+2+0.1h1. This application further provides a battery module including the foregoing secondary battery, a battery pack, and an electric apparatus.

公开(公告)号：US20220407117A1

公开(公告)日：2022-12-22

申请号：US17819303

申请日：2022-08-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han

IPC: H01M10/0569 ,  H01M10/0567

Abstract: An electrolyte solution includes an electrolyte salt and an organic solvent, wherein the electrolyte salt includes lithium bis(fluorosulfonyl)imide (LiFSI), and the percentage mass content of the lithium bis(fluorosulfonyl)imide (LiFSI) in the electrolyte solution is 4.5%-11%; the organic solvent includes ethylene carbonate, and the percentage mass contents of the ethylene carbonate and the lithium bis(fluorosulfonyl)imide satisfy: 0.9≤WLiFSI/(16.77%−WEC)≤2.9. The electrolyte solution of the present disclosure can make the battery take lower cell internal resistance, excellent high temperature storage performance and high temperature cycling performance into account at the same time.

公开(公告)号：US11522214B2

公开(公告)日：2022-12-06

申请号：US17320258

申请日：2021-05-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Cuiping Zhang ,  Changlong Han ,  Ming Zhang ,  Peipei Chen ,  Hailin Zou

IPC: H01M10/0525 ,  H01M10/04 ,  H01M10/0585 ,  H01M10/0568 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/02

Abstract: This application relates to lithium-ion batteries and related battery modules, battery packs and devices. Specifically, the lithium-ion battery includes a positive electrode plate, a negative electrode plate, an electrolyte, and a separator, wherein the positive electrode plate includes aluminum foil as a positive electrode current collector, and a content of element copper atom as an impurity per unit area of the aluminum foil is from 0.009 g/m2 to 0.021 g/m2, and the electrolyte contains first lithium salt and additive A, and the first lithium salt is a fluorine-containing sulfonimide lithium salt, and relative to total molar amount of lithium salt in the electrolyte, the fluorine-containing sulfonimide lithium salt has a molar amount of 30 mol % or higher; and the additive A is at least one of a phosphate compound containing an unsaturated bond, a cyclic compound containing a —SO2— bond and a silicon-oxygen compound containing an unsaturated bond.

公开(公告)号：US11355742B2

公开(公告)日：2022-06-07

申请号：US16679168

申请日：2019-11-09

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhiqiang Li ,  Changlong Han

IPC: H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

Abstract: This application discloses a negative electrode plate and a lithium-ion secondary battery, wherein the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on at least one surface of the negative electrode current collector, and wherein the negative active material layer includes a graphite material; wherein a ratio r between diffraction peak intensity of (004) crystal surface and diffraction peak intensity of (110) crystal surface of the negative electrode plate, a porosity s of the negative electrode plate, and a resistivity t of the negative electrode plate satisfy: 0.05 ≤ 100 × s r × t ≤ 10. The negative electrode plate and the lithium-ion secondary battery provided by this application can simultaneously achieve high safety performance, cycle performance and rate 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：US20210305552A1

公开(公告)日：2021-09-30

申请号：US17345109

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bo CHENG ,  Changlong Han

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M50/446 ,  H01M50/431

Abstract: The present application relates to a composite material with a core-shell structure for battery, wherein the core is made of a core material including metallic copper or a copper-containing compound; the shell is made of a shell material including at least one of silicon dioxide and titanium dioxide; and the core material has an average particle size D50 of 0.01 μm-5 μm, optionally 0.1 μm-3 μm, and more optionally 0.1 μm-2 μm. The present application also relates to secondary battery containing the composite material, a battery module, a battery pack, and an apparatus.