公开(公告)号：US20230361403A1

公开(公告)日：2023-11-09

申请号：US18343758

申请日：2023-06-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Mingling Li ,  Jia Peng ,  Xin Liu ,  Qisen Huang ,  Cheng Li ,  Xianghui Liu

IPC: H01M50/209 ,  G01R31/52 ,  H01M4/66 ,  H01M4/62 ,  H01M50/463

CPC classification number: H01M50/209 ,  G01R31/52 ,  H01M4/661 ,  H01M4/621 ,  H01M50/463 ,  H01M2220/20 ,  H01M2004/028

Abstract: A battery cell, a battery module, a battery pack, and an electrical apparatus are provided. The battery cell includes an intermediate portion and side portions located on two sides of the intermediate portion in a thickness direction, the intermediate portion comprising m battery cell sub-units and the side portions comprising n battery cell sub-units, where m+n is an integer greater than or equal to 3. Each of the battery cell sub-units comprises a positive electrode sheet, a negative electrode sheet and a separator arranged between the positive electrode sheet and the negative electrode sheet, and each of the m battery cell sub-units has a dry battery cell nail penetration short-circuit resistance greater than that of each of the n battery cell sub-units.

公开(公告)号：US20230282838A1

公开(公告)日：2023-09-07

申请号：US18314158

申请日：2023-05-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Jia Peng ,  Cheng Li ,  Meng Qin

IPC: H01M4/66

CPC classification number: H01M4/667 ,  H01M4/661 ,  H01M4/666

Abstract: A positive current collector, a secondary battery, and an electrical device are provided. In some embodiments, the positive current collector includes: a support layer; and a conductive layer located on at least one surface of the support layer, where the conductive layer includes a first metal portion configured to connect to a tab, where, along a thickness direction of the conductive layer, the first metal portion includes at least three sublayers, and melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer. In the embodiments of this application, the first metal portion includes at least three sublayers, and the melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer, thereby helping increase a bonding force between the conductive layer and the support layer and reducing the probability of peel-off and delamination between the layers.

公开(公告)号：US11646424B2

公开(公告)日：2023-05-09

申请号：US17123268

申请日：2020-12-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin Liu ,  Qisen Huang ,  Shiwen Wang ,  Xianghui Liu ,  Jia Peng ,  Mingling Li ,  Changliang Sheng

IPC: H01M4/66 ,  H01M4/587 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M4/133 ,  H01M4/136 ,  C07C317/12 ,  H01M4/02

CPC classification number: H01M4/667 ,  C07C317/12 ,  H01M4/133 ,  H01M4/136 ,  H01M4/587 ,  H01M4/5825 ,  H01M4/628 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2300/0037

Abstract: This application discloses a lithium-ion secondary battery. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive electrode current collector and a positive active material layer disposed on a surface of the positive electrode current collector and containing a positive active material, and the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on a surface of the negative electrode current collector and containing a negative active material; wherein the positive active material includes lithium iron phosphate, and the negative active material includes graphite; and wherein the positive electrode current collector and/or the negative electrode current collector is a composite current collector, and the composite current collector includes an organic support layer and a conductive layer disposed on at least one surface of the organic support layer.

公开(公告)号：US20210119219A1

公开(公告)日：2021-04-22

申请号：US17112775

申请日：2020-12-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin Liu ,  Mingling Li ,  Jia Peng ,  Qisen Huang ,  Chengdu Liang

IPC: H01M4/66 ,  H01M10/0525

Abstract: This application discloses a negative current collector, a negative electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The negative current collector includes a support layer and a metal conductive layer that is disposed on at least one of two opposite surfaces of the support layer in a thickness direction of the support layer. A density of the support layer is less than a density of the metal conductive layer; and the density of the metal conductive layer is 8.0 g/cm3 to 8.96 g/cm3. A thickness D1 of the metal conductive layer is 300 nm≤D1≤2 μm. When a tensile strain of the negative current collector is 2.5%, a sheet resistance growth rate T of the metal conductive layer is T≤5%.

公开(公告)号：US11705556B2

公开(公告)日：2023-07-18

申请号：US18056248

申请日：2022-11-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M4/04 ,  H01M50/46 ,  H01M4/02

CPC classification number: H01M4/667 ,  H01M4/0404 ,  H01M50/46 ,  H01M2004/028

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0