公开(公告)号：US20250023090A1

公开(公告)日：2025-01-16

申请号：US18899222

申请日：2024-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Jing TIAN ,  Shenzhao QIU

IPC: H01M10/04 ,  H01M50/119 ,  H01M50/533 ,  H01M50/538

Abstract: A battery includes a wound body, and the wound body includes a first electrode plate, a separator, and a second electrode plate that are stacked and wound. The first electrode plate includes a first current collector and a first active material layer provided on the first current collector. The first current collector includes, along a width direction of the first current collector, a first portion provided with a first active material layer and a second portion not provided with the first active material layer. The second portion is located on a side of the first portion perpendicular to a winding direction and forms a plurality of layers of first tab rolls around a central axis of the wound body. At least one layer of the first tab rolls includes a plurality of first tab plates separated from each other.

公开(公告)号：US20250158079A1

公开(公告)日：2025-05-15

申请号：US19028105

申请日：2025-01-17

Applicant: Ningde Amperex Technology Limited

Inventor： Shenzhao QIU ,  Yulong DONG

IPC: H01M4/70 ,  H01M10/04 ,  H01M50/586 ,  H01M50/595

Abstract: A cylindrical cell includes a first electrode plate, a separator, and a second electrode plate. The first electrode plate includes a first current collector, the first current collector is provided with a first blank foil region along an axial direction of the cylindrical cell, and the first blank foil region has a first chamfer at a terminating end of a winding direction of the cylindrical cell; and/or the second electrode plate includes a second current collector, the second current collector is provided with a second blank foil region along an axial direction of the cylindrical cell, and the second blank foil region has a second chamfer at a terminating end of a winding direction of the cylindrical cell. In this application, lengths of a first distance and a second 10 distance of the first chamfer and/or the second chamfer are controlled to be within appropriate ranges.

公开(公告)号：US20250167355A1

公开(公告)日：2025-05-22

申请号：US19027896

申请日：2025-01-17

Applicant: Ningde Amperex Technology Limited

Inventor： Shenzhao QIU

IPC: H01M50/133 ,  H01M50/107 ,  H01M50/533

Abstract: A secondary battery includes a housing, an electrode assembly, and a current collector plate. The current collector plate is electrically connected to the electrode assembly. The bottom of the housing includes a main body zone and a thinned zone connecting to the main body zone, and the thinned zone is electrically connected to the current collector plate. Area of the thinned zone accounts for 2% to 30% of total area of the bottom of the housing. In this application, the thinned zone is provided in a middle zone of the bottom of the housing and connects to the current collector plate via laser welding, so that the thinned zone can significantly reduce welding power during welding at the bottom, broadening a welding window and effectively improving welding yield at the bottom of the battery.

公开(公告)号：US20190198909A1

公开(公告)日：2019-06-27

申请号：US16197227

申请日：2018-11-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shenzhao QIU ,  Cheng Yuan

IPC: H01M10/04 ,  H01M2/08 ,  H01M2/26 ,  H01M4/04

CPC classification number: H01M10/045 ,  H01M2/08 ,  H01M2/26 ,  H01M4/04

Abstract: The present application discloses a battery to reduce a height of an edgefold protrusion in a direction perpendicular to a top seal, reduce structural interference between the edgefold protrusion and other components and parts, and improve a structural compactness when a user utilizes the battery. The battery includes a cell, a packaging bag, and an electrode tab. The packaging bag includes a first packaging portion configured to accommodate the cell and a second packaging portion configured to seal the cell. The second packaging portion includes a top seal configured to seal the electrode tab and two side seals intersecting the top seal. A notched structure is formed at an intersection of the top seal and the side seal. The side seal is folded over along an edge of the side seal adjacent to the first packaging portion and fixed to an outer side surface of the first packaging portion.