# US 2023/0054400 A1 · Pouch Type Secondary Battery And Method For Manufacturing The Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054400 A1 - Document ID: US20230054400A1 - Status: Published application - Kind: A1 - Application number: 17/797,828 - Filed: 2021-02-19 - Published: 2023-02-23 - Earliest claimed: 2020-02-27 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Kyu Hyun Choi; Hang June Choi; Dal Mo Kang; Jeong Oh Moon; Jin Hak Kong - Web page: https://patentgrep.com/patent/US20230054400A1 ## CPC - H01M 50/105: Pouches or flexible bags - H01M 50/131: characterised by physical properties, e.g. gas permeability, size or heat resistance - H01M 50/166: characterised by the methods of assembling casings with lids - H01M 50/178: for pouch or flexible bag cells - H01M 50/531: Electrode connections inside a battery casing - H01M 50/557: Plate-shaped terminals - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Disclosed herein are a pouch type secondary battery and a method for manufacturing the same. A pouch type secondary battery may include an electrode assembly having a first width and a pouch type exterior in which a recess part configured to accommodate the electrode assembly is formed. The recess part may include a main recess part and a sub recess part. The main recess part may have a space defining a second width that is equal to or greater than the first width. The sub recess part may communicate with the main recess part and define a space having a third width less than the first width. ## Claims ### Claim 1 A pouch type secondary battery comprising: an electrode assembly having a first width; and a pouch type exterior including a recess part to accommodate the electrode assembly, wherein the recess part includes a main recess part and a sub recess part, the main recess part including a space having a second width equal to or greater than the first width, the sub recess part in communication with the main recess part and including a space having a third width less than the first width. ### Claim 2 (depends on 1) The pouch type secondary battery of claim 1, wherein the electrode assembly includes a main body and an electrode tab protruding therefrom, the main body configured to form a body of the electrode assembly, the electrode tab defining a fourth width equal to or less than the third width, at least a portion of the electrode tab being disposed in the sub recess part. ### Claim 3 (depends on 2) The pouch type secondary battery of claim 2, wherein a small angle formed by the main recess part and the sub recess part on an area through a cross-section extending along the protruding electrode tab is formed as a right angle or an obtuse angle. ### Claim 4 (depends on 2) The pouch type secondary battery of claim 2, wherein in a cross-section of the pouch type exterior in a direction along the protruding electrode tab, an area where the main recess part and the sub recess part meet is curved shape. ### Claim 5 (depends on 1) The pouch type secondary battery of claim 1, wherein a vertical height of the main recess part and a vertical height of the sub recess part are the same. ### Claim 6 (depends on 2) The pouch type secondary battery of claim 2, wherein a length of the main body of the electrode assembly is equal to or less than a length of the main recess part. ### Claim 7 A method for manufacturing a pouch type secondary battery, the method comprising: preparing a pouch type exterior comprising a first area and a second area; pressing a portion of the first area to form a recess part in the first area; accommodating an electrode assembly having a first width in the recess part; rotating the second area about a folding area to fold the second area with respect to the first area such that the first area and the second area face each other; pulling the second area toward an end opposite to the folding area; and bonding at least a portion of a circumferential area of the first area to at least a portion of a circumferential area of the second area to form a sealing part, wherein the recess part includes a main recess part and a sub recess part, the main recess part including a space having a second width that is equal to or greater than a first width, the sub recess part being in communication with the main recess part and defining a space having a third width less than the first width. ### Claim 8 (depends on 7) The method of claim 7, wherein the step of pulling the second area toward an end opposite to the folding area includes a step of pulling an end of an area of the second area opposite the folding area. ### Claim 9 (depends on 7) The method of claim 7, wherein the step of pulling the second area toward an opposite end of the folding area includes a step of pulling the second area in a direction perpendicular to a direction of an electrode lead protruding from the pouch type exterior. ### Claim 10 (depends on 9) The method of claim 9, wherein the electrode assembly comprises an electrode tab protruding from the electrode assembly and connected to the electrode lead, the electrode tab defining a fourth width equal to or less than the third width, in the third step, at least a portion of the electrode tab being disposed in the sub recess part. ### Claim 11 (depends on 10) The method of claim 10, wherein the step of pressing a portion of the first area to form the recess part includes the step of forming a vertical height of the main recess part and a vertical height of the sub recess part to be equal.