公开(公告)号：US20240145830A1

公开(公告)日：2024-05-02

申请号：US18279360

申请日：2023-01-11

Applicant: LG Energy Solution, Ltd.

Inventor： Seung Ho Na ,  Kwang Hee Choi ,  Song Hwa Han ,  Yoon Beom Lee ,  Jun Ho Yoon ,  Yeong Jae Lee

IPC: H01M50/186 ,  H01M50/105 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129

CPC classification number: H01M50/186 ,  H01M50/105 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129

Abstract: Disclosed herein is a pouch-type secondary battery and a manufacturing method thereof including. The pouch-type secondary battery includes an electrode assembly; an electrode lead extending from an electrode tab of the electrode assembly; an upper pouch; and a lower pouch. The upper pouch and the lower pouch include a sealed area where the edges are sealed and an unsealed area. An average thickness of the sealed area of the upper pouch and an average thickness of the sealed area of the lower pouch are equal to each other, and the average thickness of the unsealed area of the upper pouch is smaller than the average thickness of the unsealed area of the lower pouch, so that even if the thickness of the lower pouch is reduced during the sealing process of heat-sealing, the sealed area of the upper and lower pouches are formed with little difference in thickness.

公开(公告)号：US20240120580A1

公开(公告)日：2024-04-11

申请号：US18272929

申请日：2022-11-17

Applicant: LG Energy Solution, Ltd.

Inventor： Seung Ho Na ,  Kwang Hee Choi ,  Dong Kyun Ha ,  Yoon Beom Lee ,  Do Woo Kim ,  Hye Ji Lee

IPC: H01M50/105 ,  H01M10/04 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129 ,  H01M50/133 ,  H01M50/178

CPC classification number: H01M50/105 ,  H01M10/0404 ,  H01M10/0481 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129 ,  H01M50/133 ,  H01M50/178

Abstract: A sealing device for a pouch-type battery includes an upper sealing block and a lower sealing block. The upper sealing block has a two-stage upper sealing groove, including a first upper step and a second upper step, and the lower sealing block has a two-stage lower sealing groove, including a first lower step and a second lower step. The upper sealing block contacts a first surface of an electrode lead sealing part of the pouch-type battery, and the lower sealing block contacts a second surface of the electrode lead sealing part of the pouch-type battery in a process of performing sealing through heat fusion. A pouch-type battery having an electrode lead sealing part formed by the sealing device is also provided.

公开(公告)号：US20230318119A1

公开(公告)日：2023-10-05

申请号：US18024540

申请日：2021-08-23

Applicant: LG Energy Solution, Ltd.

Inventor： Won Pill Hwang ,  Seung Ho Na ,  Sang Ho Bae ,  Kwan Bo Lee ,  Yoon Beom Lee ,  Shin Chul Kim ,  Su Taek Jung ,  Chang Min Han

IPC: H01M50/325 ,  H01M50/186 ,  H01M50/54 ,  H01M50/126 ,  H01M10/04 ,  H01M50/105

CPC classification number: H01M50/325 ,  H01M50/186 ,  H01M50/54 ,  H01M50/126 ,  H01M10/0481 ,  H01M10/049 ,  H01M50/105

Abstract: A secondary battery includes: an electrode assembly; an electrode lead; a battery case with an accommodation portion for the electrode assembly and a sealing portion sealing the accommodation portion; and a lead film. The sealing portion includes a connection-sealing region connected to the accommodation portion, a front end-sealing region, and a reinforcement-sealing region therebetween. The reinforcement-sealing region includes a compressed surface, provided in the sealing portion between the connection-sealing region and the front end-sealing region and recessed into the sealing portion, and raised surfaces, provided in the sealing portion between the connection-sealing region and the compressed surface and between the front end-sealing region and the compressed surface and each of which is formed thicker than the compressed surface. The battery case has a resin layer, a metal layer, and an insulating layer. The resin layer of the raised surface is formed thicker than the resin layer of the compressed surface.

公开(公告)号：US20230207933A1

公开(公告)日：2023-06-29

申请号：US17928413

申请日：2022-01-27

Applicant: LG Energy Solution, Ltd.

Inventor： Yoon Beom Lee ,  Jun Ho Yoon ,  Chang Min Han

IPC: H01M50/184 ,  H01M50/186 ,  H01M50/178

CPC classification number: H01M50/184 ,  H01M50/186 ,  H01M50/178

Abstract: The present invention is provided with a secondary battery comprising: an electrode assembly to which an electrode lead is bonded; a pouch configured to accommodate the electrode assembly and provided with a sealing part; and a lead film configured to seal a portion between the sealing part and the electrode lead, wherein a pattern means configured to pattern the sealing part and the lead film so as to increase in bonding area between the sealing part and the lead film is provided on a bonding portion between the sealing part and the lead film. Therefore, bonding force and sealing force between the lead film and the sealing part may increase.