# US 2021/0242529 A1 · Battery cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242529 A1 - Document ID: US20210242529A1 - Status: Published application - Kind: A1 - Application number: 17/165,178 - Filed: 2021-02-02 - Published: 2021-08-05 - Earliest claimed: 2020-02-04 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jiyoung AHN; Seonghoon HAN - Web page: https://patentgrep.com/patent/US20210242529A1 ## CPC - H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member} - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - H01M 50/124: having a layered structure - H01M 50/152: for cells having curved cross-section, e.g. round or elliptic (H01M50/15, H01M50/153 take precedence) - 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 - 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 Provided is a battery cell including a core material for providing electrical energy; and a cell housing for receiving the core material, wherein the cell housing includes a side cover; an upper cover for shielding an upward opening of the cell housing; a lower cover for shielding a downward opening of the cell housing; and a side vent groove formed in the side cover. ## Claims ### Claim 1 A battery cell, comprising: a core material for providing electrical energy; and a cell housing to define a cavity for receiving the core material, wherein the cell housing includes: a side cover that extends to define the cavity and has a first opening and second opening; an first cover provided at the first opening of the cell housing; a second cover provided at second opening of the cell housing; and at least one side vent groove formed in the side cover. ### Claim 2 (depends on 1) The battery cell of claim 1, wherein the side vent groove is positioned to be closer to the second cover than the first cover, and the second cover is positioned lower than the first cover. ### Claim 3 (depends on 1) The battery cell of claim 1, wherein a distance between the side vent groove and the lower one of the first cover or the second cover is 0.5 mm to 2 mm. ### Claim 4 (depends on 1) The battery cell of claim 1, wherein the side cover has a thickness that is less at the side vent groove than at another region of the side cover that differs from the side vent groove. ### Claim 5 (depends on 1) The battery cell of claim 1, wherein the side cover is formed of a common material at the side vent groove and at another at another region of the side cover away from the side vent groove. ### Claim 6 (depends on 1) The battery cell of claim 1, wherein the side vent groove is extended in a direction parallel to that of the second cover. ### Claim 7 (depends on 1) The battery cell of claim 1, wherein the side vent groove defines a closed curve around the core material. ### Claim 8 (depends on 1) The battery cell of claim 1, wherein the side vent groove includes: a first side vent groove extended in a first direction parallel to that of the second cover; and a second side vent groove extended in a second direction parallel to that of the second cover and spaced vertically from the first side vent groove. ### Claim 9 (depends on 8) The battery cell of claim 8, wherein each of the first side vent groove and the second side vent groove defines a closed curve around the core material. ### Claim 10 (depends on 1) The battery cell of claim 1, wherein the at least one side vent groove includes: a first vent groove extended in the first direction; and a second vent groove extended in a second direction and intersecting the first vent groove. ### Claim 11 (depends on 10) The battery cell of claim 10, wherein an angle between the first vent groove and the second vent groove is an acute angle. ### Claim 12 (depends on 10) The battery cell of claim 10, wherein: each of the first vent groove and the second vent groove includes a first end and second end, the first end of the first vent groove is connected to the first end of the second vent groove, a depth of the first end of the first vent groove is greater than a depth of the second end of the first vent groove, and a depth of the first end of the second vent groove is greater than a depth of the second end of the second vent groove. ### Claim 13 (depends on 11) The battery cell of claim 11, wherein a middle of the angle between the first vent groove and the second vent groove extends within 45 degrees of a direction between the first cover and the second cover. ### Claim 14 (depends on 10) The battery cell of claim 10, wherein the side vent groove further includes a third vent groove that connects the first vent groove and the second vent groove, and a distance between the first vent groove and the second vent groove increases in a direction between the second over and the first cover. ### Claim 15 (depends on 14) The battery cell of claim 14, wherein a depth of the third vent groove is greater than depths of the first vent groove and the second vent groove. ### Claim 16 (depends on 14) The battery cell of claim 14, wherein a depth of the first vent groove and a depth of the second vent groove increase towards the third vent groove. ### Claim 17 (depends on 1) The battery cell of claim 1, wherein the cell housing further includes an end vent groove formed in the first cover. ### Claim 18 (depends on 17) The battery cell of claim 17, wherein the end vent groove encircles an axis of the side cover that extends between the first cover and the second cover. ### Claim 19 A battery cell, comprising: a core material for providing electrical energy; and a cell housing the defines a cavity for receiving the core material, wherein the cell housing includes: a side cover that extends to form the cavity; an end cover provided at an opening provided at a distal end of the side cover; and at least one groove formed in the side cover, the side cover being perforated at the groove when a pressure inside the cavity exceeds a preset pressure. ### Claim 20 A battery cell, comprising: a core material for providing electrical energy; a cell housing for receiving the core material, the cell housing including a side surface, a first distal end, and a second distal end that is positioned lower than the first distal end; and a side vent groove provided at the side of the cell housing and positioned closer to the second distal end than the first distal end.