# US 12,600,220 B2 · Electric vehicle battery case to floor attachment structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,600,220 B2 - Document ID: US12600220B2 - Status: Granted - Kind: B2 - Application number: 18/384,092 - Filed: 2023-10-26 - Published: 2024-11-14 - Granted: 2026-04-14 - Earliest claimed: 2023-05-12 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Corporation - Inventors: Seung Min Jeong; Gun Woo Ko; Joo Nam Kim; Jong Wook Lee - Web page: https://patentgrep.com/patent/US12600220B2 ## CPC - B60K 1/04: of the electric storage means for propulsion - B62D 21/152: {Front or rear frames} - B62D 25/025: {Side sills thereof} - B62D 25/145: {having a crossbeam incorporated therein} - B62D 25/2036: {the subunits being side panels, sills or pillars (B62D21/157 takes precedence)} - 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) - B60K 2001/0438: {Arrangement under the floor} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract A battery case includes a floor panel of a vehicle, which forms a floor of a body of the vehicle and at the same time, forms an upper panel of a battery case, a side sill positioned at opposite sides of the floor panel, extending in a longitudinal direction of the vehicle, and extending downwardly from the floor panel in a height direction, and front and rear barriers extending downwardly from a front portion and a rear portion of the floor panel connected to the side sill to form a sidewall portion of the battery case together with the side sill by being connected to the side sill. ## Claims ### Claim 1 A battery case comprising: a floor panel of a vehicle, which forms a floor of a body of the vehicle and an upper panel of a battery case; a side sill positioned at opposite sides of the floor panel, extending in a longitudinal direction of the vehicle, and extending downwardly from the floor panel in a height direction of the vehicle; and front and rear barriers extending downwardly from a front portion and a rear portion of the floor panel connected to the side sill to form a sidewall portion of the battery case together with the side sill by being connected to the side sill, wherein an upper cross member is formed on a top surface of the floor panel to extend in a width direction of the vehicle and protrude upwardly, and wherein a rear cross member extending upwardly is formed in the rear portion of the floor panel, and a plurality of rear upper side members extending in the longitudinal direction of the vehicle to connect the rear cross member to the upper cross member are formed on a top surface of the floor panel, wherein the plurality of rear upper side members are spaced apart from each other. ### Claim 2 (depends on 1) The battery case of claim 1, wherein the floor panel and the upper cross member are molded integrally through an extrusion method. ### Claim 3 (depends on 2) The battery case of claim 2, wherein each of the floor panel and the upper cross member is molded to include a closed cross section. ### Claim 4 (depends on 1) The battery case of claim 1, wherein a lower cross member is configured in plural and the lower cross member is formed on a bottom surface of the floor panel to extend in a width direction of the vehicle and protrude downwardly. ### Claim 5 (depends on 4) The battery case of claim 4, wherein lower cross members are formed spaced from each other, and a battery module is positioned in a space where the lower cross members are formed spaced from each other. ### Claim 6 (depends on 4) The battery case of claim 4, wherein the floor panel and the lower cross member are molded integrally through an extrusion method. ### Claim 7 (depends on 1) The battery case of claim 1, wherein a lower center member formed in the longitudinal direction of the vehicle and positioned in a center portion of a bottom surface of the floor panel is formed on the bottom surface of the floor panel, and battery modules are disposed with the lower center member therebetween. ### Claim 8 (depends on 1) The battery case of claim 1, wherein a dash cross member extending upwardly is formed in the front portion of the floor panel, and a front upper side member extending in the longitudinal direction of the vehicle to connect the dash cross member to the upper cross member is formed on a top surface of the floor panel. ### Claim 9 (depends on 1) The battery case of claim 1, wherein an internal protrusion is formed in a direction inwardly from the vehicle in the side sill, the internal protrusion is positioned under the floor panel, and the side sill and the internal protrusion are formed using an extrusion molding method to form a closed cross section. ### Claim 10 (depends on 9) The battery case of claim 9, wherein the internal protrusion of the side sill surface-contacts with a lower cross member formed in a width direction of the vehicle on a bottom surface of the floor panel. ### Claim 11 (depends on 9) The battery case of claim 9, further including a battery lower case, wherein the battery lower case is coupled to the floor panel having a battery module mounted thereon, and in coupling of the battery lower case, an upper end portion of the internal protrusion of the side sill surface-contacts with the bottom surface of the floor panel and a lower end portion of the internal protrusion surface-contacts with the battery lower case. ### Claim 12 (depends on 9) The battery case of claim 9, wherein an external protrusion is formed in a direction outwardly from the vehicle in the side sill, and the external protrusion extends in the longitudinal direction of the vehicle, and an upper end portion thereof is positioned at a same height as or higher than the floor panel. ### Claim 13 (depends on 1) The battery case of claim 1, wherein front and rear barriers are formed to include a closed cross section in a width direction of the vehicle, and opposite end portions of the front and rear barriers are bent in a direction of a wheel housing of the vehicle. ### Claim 14 (depends on 13) The battery case of claim 13, wherein the front and rear barriers are formed by mechanical coupling between a center portion formed in the width direction of the vehicle and a bent portion formed to be bent in the direction of the wheel housing of the vehicle. ### Claim 15 (depends on 1) The battery case of claim 1, further including a battery lower case including a plate coupled to the side sill and front and rear barriers including a battery module mounted thereon. ### Claim 16 (depends on 15) The battery case of claim 15, wherein a mounting barrier is formed to protrude upwardly and formed along an edge portion of the battery module while surrounding the battery module, on a top surface of the plate. ### Claim 17 (depends on 1) The battery case of claim 1, wherein a rear barrier positioned in the rear portion of the floor panel is connected to a rear side member. ### Claim 18 (depends on 1) The battery case of claim 1, wherein a front end portion of the side sill is connected to a front side member coupled to the front portion of the floor panel.