# US 12,603,330 B2 · Battery module having electrolytic solution leakage detection function and battery pack 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 12,603,330 B2 - Document ID: US12603330B2 - Status: Granted - Kind: B2 - Application number: 18/128,631 - Filed: 2023-03-30 - Published: 2024-01-18 - Granted: 2026-04-14 - Earliest claimed: 2021-12-17 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Tae Hwan Roh - Web page: https://patentgrep.com/patent/US12603330B2 ## CPC - H01M 10/4228: {Leak testing of cells or batteries} - H01M 10/482: {for several batteries or cells simultaneously or sequentially} - H01M 10/484: {for measuring electrolyte level, electrolyte density or electrolyte conductivity} - H01M 10/613: Cooling or keeping cold - H01M 10/647: Prismatic or flat cells, e.g. pouch cells - H01M 10/6554: Rods or plates - H01M 50/211: adapted for pouch cells - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - 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 50/503: characterised by the shape of the interconnectors - H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules - H01M 50/516: by welding, soldering or brazing - H01M 50/569: Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals (battery terminal connectors with integrated measuring arrangements G01R31/364) - H01M 50/593: Spacers; Insulating plates - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/291: characterised by their shape - H01M 2200/00: Safety devices for primary or secondary batteries - 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 A battery module has an electrolytic solution leakage detection function. The battery module has a busbar configured to detect an electrolytic solution leaked from a battery cell. The battery module can be used in a battery pack. ## Claims ### Claim 1 A battery module comprising: a module case comprising a bottom plate, a side plate, and a top plate; a plurality of battery cells received in the module case; and a plurality of busbars configured to connect the plurality of battery cells to each other in series or in parallel, wherein at least one of the plurality of busbars includes an extension portion protruding from a lower end of a busbar body by a predetermined length toward the bottom plate of the module case, a bottom edge of each extension portion being closer to the bottom plate than a bottom edge of the busbars of the plurality of busbars that are not the at least one of the plurality of busbars including the extension portion. ### Claim 2 (depends on 1) The battery module according to claim 1, wherein the bottom edge of each extension portion is spaced apart from an upper surface of the bottom plate of the module case by a predetermined distance. ### Claim 3 (depends on 2) The battery module according to claim 2, wherein the busbar body and each extension portion are integrally formed. ### Claim 4 (depends on 2) The battery module according to claim 2, wherein the busbar body and each extension portion are separated from each other and are electrically connected to each other by a connection member. ### Claim 5 (depends on 4) The battery module according to claim 4, wherein the connection member is welding or a thermally conductive adhesive. ### Claim 6 (depends on 1) The battery module according to claim 1, further comprising a shock absorption pad provided between an inner surface of the side plate of the module case and the plurality of battery cells. ### Claim 7 (depends on 1) The battery module according to claim 1, further comprising a heat dissipation pad provided between an upper surface of the bottom plate of the module case and the plurality of battery cells. ### Claim 8 (depends on 1) The battery module according to claim 1, further comprising a busbar frame interposed between the plurality of battery cells and the plurality of busbars. ### Claim 9 (depends on 1) The battery module according to claim 1, wherein each of the plurality of battery cells is a pouch-shaped battery cell. ### Claim 10 (depends on 1) A battery pack comprising the battery module according to claim 1. ### Claim 11 (depends on 1) A method of manufacturing the battery module according to claim 1, the method comprising: receiving the plurality of battery cells in the module case and electrically connecting the battery cells to each other through the busbar, wherein the at least one of a plurality of busbars is provided with the extension portion protruding from the lower end of the busbar body by the predetermined length toward the bottom plate of the module case.