# US 2021/0242485 A1 · Pouch Forming Method And Pouch Forming Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242485 A1 - Document ID: US20210242485A1 - Status: Published application - Kind: A1 - Application number: 17/235,376 - Filed: 2021-04-20 - Published: 2021-08-05 - Earliest claimed: 2018-11-09 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Gee Hwan Kim; Sang Don Lee; Min Seung Choi; Sang Uk Yeo - Web page: https://patentgrep.com/patent/US20210242485A1 ## CPC - H01M 10/0404: {Machines for assembling batteries} - H01M 10/0436: {Small-sized flat cells or batteries for portable equipment} - B21D 22/205: {Hydro-mechanical deep-drawing} - B21D 22/22: with devices for holding the edge of the blanks (B21D22/24 - B21D22/30 take precedence; shaping over a die without external former B21D11/02) - B21D 35/005: {characterized by the material of the blank or the workpiece (B21D26/053 takes precedence)} - H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes} - H01M 10/049: {Processes for forming or storing electrodes in the battery container} - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/105: Pouches or flexible bags - H01M 50/119: Metals - H01M 50/557: Plate-shaped terminals - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - 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 - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - 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 A pouch forming method and a pouch forming device are provided. In particular, the pouch forming method for forming an accommodation part that accommodates an electrode assembly in a pouch sheet includes a seating process of seating the pouch sheet on a top surface of a lower die in which a forming groove is formed in an upper portion thereof. In a vacuum elongation process, a lower portion of the pouch sheet, in which the accommodation part is formed, is elongated by vacuum, and in an accommodation part formation process, the portion of the pouch sheet, which is elongated by the vacuum, is pressed by a punch disposed above the pouch sheet in a direction in which the forming groove is formed to form the accommodation part. ## Claims ### Claim 1 A pouch forming device for forming an accommodation part that accommodates an electrode assembly in a pouch sheet, the pouch forming device comprising: a lower die disposed on a lower portion of the pouch sheet, wherein a forming groove is formed in an upper portion thereof; a punch unit disposed above the pouch sheet and comprising a punch that is configured to press the pouch sheet in a direction of the forming groove of the lower die to form the accommodation part in the pouch sheet in a shape that corresponds to the forming groove; and a vacuum unit connected to the forming groove of the lower side to apply vacuum to the pouch sheet seated on a top surface of the lower die to elongate the forming portion of the pouch sheet. ### Claim 2 (depends on 1) The pouch forming device of claim 1, wherein the lower die further includes a vacuum passage that serves as a passage connecting the forming groove and the vacuum unit. ### Claim 3 (depends on 2) The pouch forming device of claim 2, wherein a suction aperture of the vacuum passage connected to the forming groove is provided in a lower portion of a side surface of the forming groove. ### Claim 4 (depends on 3) The pouch forming device of claim 3, wherein the suction aperture of the vacuum passage is provided in plurality along the lower portion of the side surface of the forming groove. ### Claim 5 (depends on 3) The pouch forming device of claim 3, wherein the vacuum passage has a shape that gradually decreases in diameter toward the suction aperture. ### Claim 6 (depends on 2) The pouch forming device of claim 2, wherein an end of the punch is disposed at a position that faces the forming groove of the lower die, and the end of the punch is configured to be inserted into the forming groove of the lower die to press the pouch sheet to form the accommodation part. ### Claim 7 (depends on 1) The pouch forming device of claim 1, wherein the vacuum unit comprises a vacuum pump. ### Claim 8 (depends on 1) The pouch forming device of claim 1, further comprising a stripper unit, wherein the stripper unit comprises: a stripper disposed above the pouch sheet and pressing an outer portion of the accommodation part in the pouch sheet to support the pouch sheet on the lower die; and a stripper moving part that allows the stripper to vertically move. ### Claim 9 (depends on 8) The pouch forming device of claim 8, further comprising a control unit that adjusts a pressing force for pressing the pouch sheet by the stripper, wherein, when the punch is inserted into the forming groove of the lower die to press the pouch sheet, the control unit decreases the pressing force for pressing the pouch sheet by controlling the stripper moving part to cause the stripper to ascend. ### Claim 10 (depends on 9) The pouch forming device of claim 9, wherein the punch unit further comprises a punch moving part that allows the punch to vertically move, wherein the punch moving part allows the punch to descend to press the pouch sheet, and the control unit controls the punch moving part and the stripper moving part to cause the stripper to gradually ascend, and simultaneously, a descending speed of the punch to gradually decrease.