# US 12,015,165 B2 · Battery module including base plate having gas discharge passage, and battery pack and energy storage system including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,165 B2 - Document ID: US12015165B2 - Status: Granted - Kind: B2 - Application number: 17/294,562 - Filed: 2020-05-27 - Published: 2022-01-20 - Granted: 2024-06-18 - Earliest claimed: 2019-06-17 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Jae-Min Yoo; Jeong-O Mun; Eun-Gyu Shin; Yoon-Koo Lee - Web page: https://patentgrep.com/patent/US12015165B2 ## CPC - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - H01M 50/358: External gas exhaust passages located on the battery cover or case - H01M 10/613: Cooling or keeping cold - H01M 10/627: Stationary installations, e.g. power plant buffering or backup power supplies - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/653: characterised by electrically insulating or thermally conductive materials - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 10/6567: Liquids - H01M 50/211: adapted for pouch cells - H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/271: Lids or covers for the racks or secondary casings - 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 50/35: Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages - H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/627: Filling ports - H01M 50/308: Detachable arrangements, e.g. detachable vent plugs or plug systems - H01M 2220/10: Batteries in stationary systems, e.g. emergency power source in plant - 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 A battery module reduces the risk of secondary ignition or explosion and increases cooling efficiency. The battery module includes a cell assembly having a plurality of secondary batteries stacked on each other in a front and rear direction; and a base plate configured such that the plurality of secondary batteries of the cell assembly are mounted to an upper portion thereof, the base plate including at least one gas discharge passage having a sidewall elongated in the front and rear direction to communicate with the outside and an open portion formed by a top of the sidewall in one direction and at least one anti-inflammatory mesh sheet configured to cover the open portion. ## Claims ### Claim 1 A battery module, comprising: a cell assembly having a plurality of secondary batteries stacked on each other in a front and rear direction; and a base plate configured such that the plurality of secondary batteries of the cell assembly are mounted to an upper portion thereof, the base plate including: at least one gas discharge passage having a sidewall elongated in the front and rear direction to communicate with the outside; and an open portion formed by a top of the sidewall in one direction and at least one anti-inflammatory mesh sheet configured to cover the open portion. ### Claim 2 (depends on 1) The battery module according to claim 1, wherein the base plate includes a cooling member located at one side of the gas discharge passage so that the cell assembly is mounted to an upper portion thereof, the cooling member having a coolant channel elongated in at least one direction to communicate with the outside, a coolant injection port for injecting a coolant and a coolant discharge port for discharging the coolant. ### Claim 3 (depends on 2) The battery module according to claim 2, further comprising: a thermally conductive pad interposed between the cooling member of the base plate and the plurality of secondary batteries. ### Claim 4 (depends on 3) The battery module according to claim 3, wherein the thermally conductive pad has a plurality of insert grooves formed at locations corresponding to the plurality of secondary batteries so that the plurality of secondary batteries are partially inserted into a respective one of the plurality of insert grooves. ### Claim 5 (depends on 2) The battery module according to claim 2, further comprising: an upper cover having a top portion extending in a horizontal direction to cover an upper portion of the cell assembly and side portions coupled to the base plate and extending downward from a left end and a right end of the top portion to cover a left side and a right side of the cell assembly, respectively; a bus bar assembly having a bus bar electrically connected to the cell assembly and a bus bar frame coupled to the side portion so that the bus bar is mounted thereto; a front cover coupled to a front end of the upper cover to cover a front side of the cell assembly; and a rear cover coupled to a rear end of the upper cover to cover a rear side of the cell assembly. ### Claim 6 (depends on 5) The battery module according to claim 5, wherein the rear cover has open holes through which the coolant injection port and the coolant discharge port of the cooling member are exposed to the outside, respectively, and wherein the rear cover has a gas exhaust hole opened to communicate with the gas discharge passage. ### Claim 7 (depends on 6) The battery module according to claim 6, wherein the rear cover includes a mesh member inserted into the gas exhaust hole. ### Claim 8 (depends on 1) The battery module according to claim 1, wherein the cell assembly includes an anti-inflammatory sheet interposed between the plurality of secondary batteries. ### Claim 9 (depends on 1) A battery pack, comprising at least one battery module as defined in claim 1. ### Claim 10 (depends on 9) An energy storage system, comprising the battery pack as defined in claim 9.