# US 12,009,540 B2 · Eco-friendly power source such as battery module for transportation vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,540 B2 - Document ID: US12009540B2 - Status: Granted - Kind: B2 - Application number: 18/155,409 - Filed: 2023-01-17 - Published: 2024-04-18 - Granted: 2024-06-11 - Earliest claimed: 2022-10-13 - Assignees: SK On Co., Ltd. - Applicants: SK On Co., Ltd. - Inventors: Ho Yeon Kim; Sang Tae An; Hwa Kyoo Yoon; Gang U Lee; Young Sun Choi; Jeong Woo Han - Web page: https://patentgrep.com/patent/US12009540B2 ## CPC - H01M 10/613: Cooling or keeping cold - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/6554: Rods or plates - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 10/658: by thermal insulation or shielding - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/233: characterised by physical properties of casings or racks, e.g. dimensions - H01M 50/258: Modular batteries; Casings provided with means for assembling - H01M 50/262: with fastening means, e.g. locks - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) - H01M 50/291: characterised by their shape - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - 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 ## Abstract An eco-friendly power source such as a battery module is provided for a transportation vehicle, including: a first sub-module and a second sub-module respectively including a cell stack in which a plurality of battery cells are stacked; and a central wall disposed between the first sub-module and the second sub-module, wherein the central wall includes a first central wall facing the first sub-module and a second central wall facing the second sub-module, wherein the first central wall has a rotationary symmetrical shape of the second central wall around a first axis. ## Claims ### Claim 1 An eco-friendly battery module, comprising: a first sub-module and a second sub-module respectively including a cell stack in which a plurality of battery cells are stacked; and a central wall disposed between the first sub-module and the second sub-module, wherein the central wall includes a first central wall contacting the first sub-module and a second central wall contacting the second sub-module, wherein the first central wall comprises at least one first groove portion disposed on a surface of the first central wall, but not completely penetrating through the first central wall, the at least one first groove portion on the surface of the first central wall contacting the first sub-module, wherein the second central wall comprises at least one second groove portion disposed on a surface of the second central wall, but not completely penetrating through the second central wall, the at least one second groove portion on the surface of the second central wall contacting the second sub-module, and wherein the at least one first groove portion and the at least one second groove portion have a space to move gas emitted from the battery. ### Claim 2 (depends on 1) The eco-friendly battery module of claim 1, wherein the first central wall is coupled to the first sub-module, wherein the second central wall is coupled to the second sub-module. ### Claim 3 (depends on 1) The eco-friendly battery module of claim 1, wherein the first sub-module and the second sub-module have the same structure. ### Claim 4 (depends on 3) The eco-friendly battery module of claim 3, wherein the first central wall and the second central wall have the same structure. ### Claim 5 (depends on 1) The eco-friendly battery module of claim 1, further comprising: at least one side cover protecting at least one of the first sub-module and the second sub-module, wherein the central wall is coupled to the at least one side cover. ### Claim 6 (depends on 5) The eco-friendly battery module of claim 5, wherein the central wall comprises a first fastening groove, wherein the central wall is coupled to the at least one side cover through a fastening member and the first fastening groove. ### Claim 7 (depends on 1) The eco-friendly battery module of claim 1, further comprising: an upper cover covering upper portions of the first sub-module and the second sub-module; and a lower cover covering lower portions of the first sub-module and the second sub-module, wherein the central wall is coupled to the upper cover and the lower cover. ### Claim 8 (depends on 7) The eco-friendly battery module of claim 7, wherein the central wall comprises a second fastening groove, wherein the central wall is coupled to the upper cover and the lower cover through a fastening member and the second fastening groove. ### Claim 9 (depends on 1) The eco-friendly battery module of claim 1, wherein the central wall comprises a guide groove and a guide protrusion formed on one surface thereof. ### Claim 10 (depends on 9) The eco-friendly battery module of claim 9, wherein the guide groove and the guide protrusion are disposed to be symmetrical with respect to a centerline passing through a center of the central wall. ### Claim 11 (depends on 9) The eco-friendly battery module of claim 9, wherein the guide groove of the first central wall is in contact with the guide protrusion of the second central wall, wherein the guide protrusion of the first central wall is in contact with the guide groove of the second central wall. ### Claim 12 (depends on 1) The eco-friendly battery module of claim 1, wherein the at least one first groove portion expands inwardly from outer surface of the first central wall to inner side of the first central wall, and wherein the at least one second groove portion expand inwardly from outer surface of the second central wall to inner side of the second central wall. ### Claim 13 (depends on 1) The eco-friendly battery module of claim 1, wherein the at least one first groove portion of the first central wall extends in a first direction and has a depth in a second direction perpendicular to the first direction and is formed in a direction, from the first central wall toward the first sub-module, wherein the at least one second groove portion of the second central wall extends in the first direction and has depth in the second direction and is formed in a direction, from the second central wall toward the second sub-module. ### Claim 14 A battery module comprising: a first sub-module and a second sub-module respectively including a cell stack in which a plurality of battery cells are stacked; a central wall disposed between the first sub-module and the second sub-module; and an upper cover and a lower cover covering the first sub-module and the second sub-module, wherein the central wall includes a first central wall facing the first sub-module and a second central wall facing the second sub-module, wherein the first central wall and the second central wall have through holes extending from the lower cover to the upper cover, wherein the first central wall comprises at least one first groove portion disposed on a surface of the first central wall, but not completely penetrating through the first central wall, the at least one first groove portion on the surface of the first central wall contacting the first sub-module, wherein the second central wall comprises at least one second groove portion disposed on a surface of the second central wall, but not completely penetration through the second central wall, the at least one second groove portion on the surface of the second central wall contacting the second sub-module, and wherein the at least one first groove portion and the at least one second groove portion have a space to move gas emitted from the battery cells.