公开(公告)号：US11614494B2

公开(公告)日：2023-03-28

申请号：US17566694

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yucang Hao ,  Xiaobo Chen ,  Ting Li

IPC: G01R31/385 ,  H01M10/42

Abstract: The application provides a method, apparatus, device and medium for detecting an internal short-circuit fault of a battery cell. The method includes obtaining electrical signal values for each of m battery cells of a battery pack, when it is in a preset condition including that a current detection is an nth detection; performing following steps for a target battery cell: calculating a first parameter of the target battery cell using the electrical signal values of the target battery cell, which characterizes a degree of fluctuation of the electrical signal values; calculating a second parameter that characterizes a degree of dispersion between the first parameter of the target battery cell and first parameters of other battery cells; and determining that an internal short-circuit fault occurs in the target battery cell, under a condition that the second parameter is greater than a threshold.

公开(公告)号：US20220140432A1

公开(公告)日：2022-05-05

申请号：US17578343

申请日：2022-01-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaobo Chen ,  Xianda Li ,  Shaoji Wu ,  Ting Li

IPC: H01M50/342 ,  H01M50/209 ,  H01M50/383 ,  H01M10/613

Abstract: Embodiments of this application provide an explosion-proof valve, a battery pack, and an apparatus. The explosion-proof valve includes a flame arresting member and an air permeable membrane. The flame arresting member is configured to connect to a housing of a battery pack, the air permeable membrane is fastened to the flame arresting member, and the battery pack is capable of exchanging gas with the outside through the flame arresting member and the air permeable membrane in sequence. During use of the explosion-proof valve of this application in the battery pack of this application, when thermal runaway occurs inside the housing of the battery pack, pressure inside the housing is suddenly increased, and as a result, the battery pack releases the pressure through the explosion-proof valve, and high-temperature runaway gas impacts and melts the air permeable membrane, forming a smooth air flow channel.

公开(公告)号：US20220196748A1

公开(公告)日：2022-06-23

申请号：US17566694

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yucang HAO ,  Xiaobo Chen ,  Ting Li

IPC: G01R31/385 ,  H01M10/42

Abstract: The application provides a method, apparatus, device and medium for detecting an internal short-circuit fault of a battery cell. The method includes obtaining electrical signal values for each of m battery cells of a battery pack, when it is in a preset condition including that a current detection is an nth detection; performing following steps for a target battery cell: calculating a first parameter of the target battery cell using the electrical signal values of the target battery cell, which characterizes a degree of fluctuation of the electrical signal values; calculating a second parameter that characterizes a degree of dispersion between the first parameter of the target battery cell and first parameters of other battery cells; and determining that an internal short-circuit fault occurs in the target battery cell, under a condition that the second parameter is greater than a threshold.

公开(公告)号：US20250087808A1

公开(公告)日：2025-03-13

申请号：US18955852

申请日：2024-11-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED ,  GONG YI VAN-RESEARCH INNOVATION COMPOSITE MATERIAL CO., LTD

Inventor： Haizu Jin ,  Qiyong Yu ,  Jicheng Zhang ,  Xizong Liu ,  Duojun Lv ,  Shaojun Niu ,  Endong Xu ,  Zhiwei Xiao ,  Ting Li ,  Jing Li ,  Jiajie Lu

IPC: H01M50/24 ,  H01M50/204 ,  H01M50/222 ,  H01M50/227 ,  H01M50/229 ,  H01M50/231 ,  H01M50/342

Abstract: This application discloses a heat-resistant protective member and a battery. The heat-resistant protective member includes a reinforcing layer, a functional layer, and a strengthening layer that are sequentially arranged; the functional layer includes a first resin and a filler dispersed in the first resin; and the reinforcing layer and the strengthening layer each include a fiber matrix. In the foregoing manner, thermal impact of a single battery during ignition and detonation can be resisted, and structural integrity under the thermal impact can still be prevented from being broken through, so as to provide effective heat insulation and protection for a battery pack.

公开(公告)号：US20240339729A1

公开(公告)日：2024-10-10

申请号：US18749642

申请日：2024-06-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huaichao Tang ,  Qianjun Chen ,  Ting Li

IPC: H01M50/474 ,  H01M10/0585 ,  H01M50/586

CPC classification number: H01M50/474 ,  H01M10/0585 ,  H01M50/586

Abstract: Provided are an electrode assembly, a battery cell, a battery, and an electrical device, belonging to the field of battery technology. The electrode assembly includes a cladding layer, a plurality of stacked electrode sheets, and a separator disposed between the two adjacent electrode sheets. The electrode sheet includes an active material region and an inactive material region, the active material regions of the plurality of electrode sheets and the separator are stacked to form a body portion, and the inactive material regions of the plurality of electrode sheets are stacked to form a tab portion protruding from the body portion. The cladding layer at least clads a circumference of the body portion to cover an edge of the active material region.

公开(公告)号：US20240021782A1

公开(公告)日：2024-01-18

申请号：US18471332

申请日：2023-09-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huaichao Tang ,  Ting Li ,  Longqing Peng ,  Shaojun Niu ,  Haizu Jin ,  Minggao Ouyang ,  Kai Wu

IPC: H01M4/13 ,  H01M50/534 ,  H01M50/586

CPC classification number: H01M4/13 ,  H01M50/534 ,  H01M50/586

Abstract: Provided are an electrode plate and a secondary battery having the same. The electrode plate comprises a current collector and an active material layer, wherein the current collector comprises a main body portion and tabs, the active material layer is coated on the surface of the main body portion, and the tabs extend from one end of the main body portion along the first direction; a first insulating portion is formed on the end face of the main body portion that is provided with the tabs, and a second insulating portion different from the first insulating portion is formed on the end faces of the main body portion that are not provided with the tabs. The electrode plate of the present application has a good end-face insulation protection and can improve the safety performance of the secondary battery.