# US 2022/0278352 A1 · Pressing jig for removing gas trap and method for manufacturing secondary battery using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0278352 A1 - Document ID: US20220278352A1 - Status: Published application - Kind: A1 - Application number: 17/630,946 - Filed: 2021-01-08 - Published: 2022-09-01 - Earliest claimed: 2020-01-10 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Suk Hyun HONG; Joon Sung BAE; Eui Kyung LEE; Sang Jih KIM; Beom Koon LEE; Dong Hun BAE - Web page: https://patentgrep.com/patent/US20220278352A1 ## CPC - H01M 10/0481: {Compression means other than compression means for stacks of electrodes and separators} - H01M 10/446: {Initial charging measures} - H01M 4/0447: {of complete cells or cells stacks} - H01M 10/52: Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30) - H01M 50/317: Re-sealable arrangements - H01M 50/394: {Gas-pervious parts or elements} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/058: Construction or manufacture - 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 A pressing jig for removing gas generated in an activation process of a battery cell includes a plate-shaped lower plate on which the battery cell that has undergone the activation process is placed and fixed, and an upper plate that presses the battery cell placed on the lower plate from above. At least one of the upper plate or the lower plate has a structure in which n (n≥3) separated sub-plates are assembled to form a single plate, and the sub-plates independently press the battery cell. The pressing jig can suppress trapping of internal gas by sequentially pressing the battery cell. ## Claims ### Claim 1 A pressing jig comprising a pair of plates facing each other for pressing a battery cell after interposing the battery cell between the pair of plates to remove gas generated in an activation process of the battery cell, wherein at least one of the pair of plates is provided as a combination of n separate subplates, wherein the subplates each independently press the battery cell, and wherein n is equal to or greater than 3. ### Claim 2 (depends on 1) The pressing jig of claim 1, wherein the pair of plates comprise: a lower plate configured to support the battery cell at a lower portion of the battery cell; and an upper plate configured to press the battery cell at an upper portion of the battery cell, and wherein the at least one of the pair of plates is only the upper plate, and the upper plate sequentially presses a top surface of the battery cell. ### Claim 3 (depends on 1) The pressing jig of claim 1, wherein the pair of plates comprise: a lower plate configured to press the battery cell from a lower portion of the battery cell; and an upper plate configured to press the battery cell at an upper portion of the battery cell, and wherein the at least one of the pair of plates is both the upper plate and the lower plate, and the upper plate and lower plate sequentially press both surfaces of the battery cell. ### Claim 4 (depends on 1) The pressing jig of claim 1, wherein the subplates sequentially press the battery cell in one direction selected from a radial direction, a left and right direction, a left direction, a right direction, a vertical direction, an upward direction and a downward direction. ### Claim 5 (depends on 2) The pressing jig of claim 2, wherein the lower plate includes a heating unit. ### Claim 6 (depends on 1) The pressing jig of claim 1, wherein the subplates are consecutively set. ### Claim 7 (depends on 1) The pressing jig of claim 1, wherein at least one of the plurality of subplates has a heating unit. ### Claim 8 (depends on 1) The pressing jig of claim 1, wherein each of the subplates has a same volume, and the subplates form one upper plate. ### Claim 9 (depends on 1) The pressing jig of claim 1, wherein each of the subplates has different volumes, and the subplates form one upper plate. ### Claim 10 (depends on 1) A method for manufacturing a secondary battery including a pressing step for removing gas by using the pressing jig of claim 1, the method comprising: an activation step of activating the battery cell by charging and discharging the battery cell; and a pressing step of collecting gas generated during the activation step in a gas pocket by pressing the battery cell, wherein, in the pressing step, the subplates sequentially press the battery cell in one direction selected from a radial direction, a left and right direction, a left direction, a right direction, a vertical direction, an upward direction and a downward direction. ### Claim 11 (depends on 10) The method of claim 10, wherein the pressing step comprises: a process of mounting the battery cell on the pressing jig; a first pressing process of pressing the battery cell by some of the subplates of the at least one of the pair of plates; and a second pressing process of sequentially pressing the battery cell by remaining subplates of the at least one of the pair of plates. ### Claim 12 (depends on 10) The method of claim 10, wherein the subplates sequentially press one surface of the battery cell. ### Claim 13 (depends on 10) The method of claim 10, wherein the subplates sequentially press both surfaces of the battery cell. ### Claim 14 (depends on 10) The method of claim 10, further comprising, after the pressing step: a perforation step of perforating a through hole connected to an inside of a battery case of the secondary battery to discharge the gas collected in the gas pocket to an outside; and a sealing step of sealing, by heat fusion, after discharging the gas collected in the gas pocket through the through hole formed in the perforation step.