公开(公告)号：US20250055140A1

公开(公告)日：2025-02-13

申请号：US18708470

申请日：2022-11-15

Applicant: Panasonic Energy Co., Ltd.

Inventor： Shunsuke NAMBUYA ,  Shuichi TSUNODA

IPC: H01M50/489 ,  H01M4/02 ,  H01M10/0587 ,  H01M50/449 ,  H01M50/595

Abstract: Provided is a secondary battery in which: at least a portion of a first outermost peripheral tape opposes a first end portion heat resistant layer; at least a portion of a second outermost peripheral tape opposes a second end portion heat resistant layer; and a ratio (A1/W) of a length (A1) from one end, in a width direction, of a separator to a central side end portion, in the width direction, of the first outermost peripheral tape to a length (W), in the width direction, of the separator, and a ratio (A2/W) of a length (A2) from the other end, in the width direction, of the separator to a central side end portion, in the width direction, of the second outermost peripheral tape to the length (W), in the width direction, of the separator are each at most equal to 0.25.

公开(公告)号：US20250055134A1

公开(公告)日：2025-02-13

申请号：US18933430

申请日：2024-10-31

Applicant: LG ENERGY SOLUTION, LTD.

Inventor： Kyung-Ryun KA ,  Hye-Jin KWON ,  Seung-Hyun LEE ,  Je-An LEE

IPC: H01M50/449 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/0587 ,  H01M50/42 ,  H01M50/443 ,  H01M50/446 ,  H01M50/46 ,  H01M50/491

Abstract: A separator for a secondary battery comprising a porous polymer substrate; a first layer on at least one surface of the porous polymer substrate, wherein the first layer includes inorganic particles and a nonparticulate acrylic polymer having a glass transition temperature of 15° C. or less, wherein the nonparticulate acrylic polymer connects and fixes the inorganic particles; and a second layer on an upper surface of the first layer, wherein the second layer includes a particulate acrylic polymer having a glass transition temperature of 20°° C. to 50° C. The separator for a secondary battery has good adhesion with the electrode and can solve the resistance problem in the presence of the inorganic particles.

公开(公告)号：US20250055040A1

公开(公告)日：2025-02-13

申请号：US18723609

申请日：2022-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichi Sakamoto ,  Shinya Geshi

IPC: H01M10/0587 ,  H01M10/04 ,  H01M50/107 ,  H01M50/152

Abstract: In the present invention, an electrode terminal of a battery includes: a first connection part that encloses one side in an axial direction of an annular groove portion provided in a circumferential wall of the battery; a second connection part that encloses another side in the axial direction of the groove portion; and a bridge portion that connects the first connection part and the second connection part. When the swelling of the battery causes the groove portion to expand in the axial direction, the bridge portion ruptures and thereby blocks a current flowing between the first connection part and the second connection part.

公开(公告)号：US12224421B2

公开(公告)日：2025-02-11

申请号：US17493272

申请日：2021-10-04

Applicant: LG Energy Solution, Ltd.

Inventor： Young In Hu ,  Kyu Bok Yeon

IPC: H01M4/04 ,  B29C55/18 ,  H01M4/139 ,  H01M10/0587

Abstract: The present invention relates to a method of rolling an electrode including a speed-changing rolling section, including: a step of inputting an electrode to a rolling device including at least one pair of rolling rolls; and a step of automatically adjusting a space between the rolling rolls according to a space compensation value between the rolling rolls according to a rolling speed change.

公开(公告)号：US20250046946A1

公开(公告)日：2025-02-06

申请号：US18490747

申请日：2023-10-19

Applicant: Kye-seol LEE

Inventor： Kye-seol LEE

IPC: H01M50/403 ,  B65H18/08 ,  H01M10/0587

Abstract: Disclosed is a core for winding a secondary battery separator film used to stably wind an electrode assembly. The core includes an upper core and a lower core, wherein a rectangular protrusion is formed on a lower surface of the upper core, a rectangular groove is formed in an upper surface of the lower core, when a separator film is wound, the upper core and the lower core move toward the center from opposite sides, the film is located between the protrusion of the upper core and the groove of the lower core, the upper core and the lower core are fastened to each other, and the film is wound on the core by rotation of the core.

公开(公告)号：US20250046920A1

公开(公告)日：2025-02-06

申请号：US18720197

申请日：2022-11-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kaoru Inoue ,  Hirotetsu Suzuki ,  Takayuki Shirane ,  Takahito Nakayama

IPC: H01M50/136 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/133

Abstract: A cylindrical secondary battery comprises an outer package can with a cylindrical cylinder part and an electrode body arranged within the cylinder part. A ratio of the minimum value of the outer diameters in the cylinder central part of the outer package can, the cylinder central part being positioned in the center in the axial direction, to the average value of the outer diameters in the cylinder bottom end part is 99.89% or more; and the ratio of the maximum value of the outer diameters in the cylinder central part to the average value of the outer diameters in the cylinder bottom end part is 100.80% or less. The outer diameters in the cylinder central part periodically change with respect to the angle of circumference; and the period in which the outer diameters in the cylinder central part change with respect to the angle of circumference is 0.4π to 1.0π.

公开(公告)号：US12218313B2

公开(公告)日：2025-02-04

申请号：US17727813

申请日：2022-04-25

Applicant: Prime Planet Energy & Solutions, Inc.

Inventor： Masashi Muraoka ,  Kazuki Takeno

IPC: H01M10/0587 ,  H01M10/0569 ,  H01M4/02

Abstract: A nonaqueous electrolyte secondary battery includes an exterior package, an electrode assembly, and an electrolyte solution. In a cross section orthogonal to a winding axis of the laminated assembly, the electrode assembly has a contour line having a corner-rounded rectangular shape. The contour line consists of a first arc-shaped portion, a straight line portion, and a second arc-shaped portion. The contour line has a height ratio (R1=H0/H1) of 1.20 to 1.35. H0 represents a distance between two points most distant from each other on the contour line. H1 represents an average length of the two line segments. The separator includes a first main surface and a second main surface. The first main surface is in contact with the negative electrode plate. A first dynamic coefficient of friction between the first main surface and the negative electrode plate is 0.52 to 0.66.

公开(公告)号：US20250038362A1

公开(公告)日：2025-01-30

申请号：US18917876

申请日：2024-10-16

Applicant: SAMSUNG SDI CO., LTD.

Inventor： In Seop BYUN

IPC: H01M50/46 ,  H01M4/13 ,  H01M10/052 ,  H01M10/0587 ,  H01M50/105 ,  H01M50/531

Abstract: An electrode assembly includes: a first electrode plate having a first electrode uncoated portion spaced apart from both ends in a longitudinal direction thereof, and a base tab on one surface of the first electrode uncoated portion; a second electrode plate having a second electrode uncoated portion spaced apart from both ends in a longitudinal direction thereof, and a base tab on one surface of the second electrode uncoated portion; a separator between the first electrode plate and the second electrode plate; a tab cover tape attached to the one surfaces of the first electrode uncoated portion and the second electrode uncoated portion; an uncoated portion cover tape attached to each of the other surfaces of the first electrode uncoated portion and the second electrode uncoated portion; and an insulating tape attached onto the second electrode plate at a position corresponding to the first electrode uncoated portion.

公开(公告)号：US20250038200A1

公开(公告)日：2025-01-30

申请号：US18537222

申请日：2023-12-12

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Erang CHO ,  Jin-Hyeok LIM ,  Jinah SEO ,  Sujeong KOH ,  Yunhee KIM ,  Minju LEE

IPC: H01M4/58 ,  H01M4/525 ,  H01M10/0587 ,  H01M10/42

Abstract: A rechargeable lithium battery and the rechargeable lithium battery including a positive electrode is provided. The positive electrode includes a positive active material and sulfur, a negative electrode comprising a negative active material and sulfur, and a non-aqueous electrolyte. An amount of sulfur in the positive electrode is at least twice an amount of sulfur in the negative electrode.

公开(公告)号：US20250038166A1

公开(公告)日：2025-01-30

申请号：US18918551

申请日：2024-10-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

Inventor： Xingbu Chen ,  Xin Sun ,  Lili Wu ,  Rundie Liu ,  Peidong Song

IPC: H01M4/04 ,  H01M4/139 ,  H01M10/04 ,  H01M10/0587 ,  H01M50/107 ,  H01M50/152 ,  H01M50/627

Abstract: A battery cell, a battery, and an electrical device are described. The battery cell includes an electrode assembly. The electrode assembly is wound along a winding direction to form a jelly-roll structure containing a roll core cavity in a central region. The battery cell further includes a gel-state central column packed in the roll core cavity and formed by coagulation. The central roll core cavity formed by winding the electrode assembly is packed with the gel material that coagulates to form a gel-state central column. In this way, the central column can support the electrode assembly after coagulating in shape, thereby improving the deformation resistance of the electrode assembly, and reducing the risk of central collapse of the electrode assembly. In addition, when the electrode assembly is squeezed, the central column can serve as an elastic cushion to some extent.