# US 11,999,412 B2 · Side sill assembly of vehicle with reinforced stiffness > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,412 B2 - Document ID: US11999412B2 - Status: Granted - Kind: B2 - Application number: 17/742,997 - Filed: 2022-05-12 - Published: 2023-03-09 - Granted: 2024-06-04 - Earliest claimed: 2021-09-09 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Corporation - Inventors: Won-Jung Song - Web page: https://patentgrep.com/patent/US11999412B2 ## CPC - B62D 25/025: {Side sills thereof} - B62D 21/157: {for side impacts} - B62D 27/023: {Assembly of structural joints} - 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) ## Abstract A side sill assembly of the vehicle includes a side sill inner, a side sill outer, and a reinforcement unit provided between the side sill inner and the side sill outer. The reinforcement unit includes an upper member provided in a longitudinal direction of the vehicle; a lower member provided in the longitudinal direction of the vehicle, and located to be spaced from the upper member under the upper member; and an intermediate member having an upper surface bonded to a bottom portion of the upper member and a lower surface bonded to an upper surface of the lower member alternately formed thereon. ## Claims ### Claim 1 A side sill assembly of a vehicle with reinforced stiffness, the side sill assembly comprising: a side sill inner, a side sill outer, and a reinforcement unit provided between the side sill inner and the side sill outer, wherein the reinforcement unit includes: an upper member provided in a longitudinal direction of the vehicle; a lower member provided in the longitudinal direction of the vehicle, and located to be spaced from the upper member under the upper member; and an intermediate member having an upper surface bonded to a bottom portion of the upper member and a lower surface bonded to an upper surface of the lower member alternately formed thereon, and wherein the lower member is formed so that a width of the lower member in a width direction of the vehicle is narrower than a width of the intermediate member. ### Claim 2 (depends on 1) The side sill assembly of claim 1, wherein the side sill inner is formed with a first upper bonding portion and a first lower bonding portion, and the side sill outer is formed with a second upper bonding portion facing the first upper bonding portion and a second lower bonding portion facing the first lower bonding portion, and wherein the side sill inner and the side sill outer include intermediate portions formed to be convex in opposite directions to have a space therebetween, and wherein the reinforcement unit is provided in the space formed between the side sill inner and the side sill outer. ### Claim 3 (depends on 1) The side sill assembly of claim 1, wherein the upper and lower surfaces of the intermediate member are connected by a connection surface. ### Claim 4 (depends on 3) The side sill assembly of claim 3, wherein the connection surface is formed to be inclined with an acute angle with respect to the longitudinal direction. ### Claim 5 (depends on 1) The side sill assembly of claim 1, wherein the upper member includes: an upper base formed in the longitudinal direction of the vehicle; and an upper flange portion formed to extend upwards from the upper base to be bonded to an inside surface of the side sill inner. ### Claim 6 (depends on 5) The side sill assembly of claim 5, wherein an upper reinforcement bead having a convex cross section is formed on the upper base in the longitudinal direction of the vehicle. ### Claim 7 (depends on 1) The side sill assembly of claim 1, wherein the lower member includes: a lower base formed in the longitudinal direction of the vehicle; and a lower flange portion formed to extend downwardly from the lower base to be bonded to a lower bonding portion of the side sill inner. ### Claim 8 (depends on 7) The side sill assembly of claim 7, wherein a lower reinforcement bead having a concave cross section is formed on the lower base in the longitudinal direction of the vehicle. ### Claim 9 (depends on 1) The side sill assembly of claim 1, wherein the lower member is formed from a width directional outside end portion of the vehicle of the intermediate member up to a predetermined width. ### Claim 10 (depends on 1) The side sill assembly of claim 1, wherein a width of the lower member is formed at 45% to 55% of the width of the intermediate member. ### Claim 11 (depends on 1) The side sill assembly of claim 1, wherein the intermediate member is bonded to the upper member and the lower member by spot welding. ### Claim 12 (depends on 1) The side sill assembly of claim 1, wherein a width directional interior of the vehicle of the lower surface of the intermediate member is a welding surface bonded to an inclined surface of an inside surface of the side sill inner. ### Claim 13 (depends on 12) The side sill assembly of claim 12, wherein a nut mounting surface on which a lower end portion of a battery mounting nut configured to mount a battery is located is formed on the welding surface, and wherein the battery mounting nut has a lower end portion bonded to the nut mounting surface. ### Claim 14 (depends on 13) The side sill assembly of claim 13, wherein the lower end portion of the battery mounting nut is bonded to the nut mounting surface by CO2 welding or projection welding. ### Claim 15 (depends on 14) The side sill assembly of claim 14, wherein a through hole through which the battery mounting nut is provided to penetrate is formed in an upper base of the upper member, and wherein an outside circumference of the battery mounting nut is bonded to an inside circumference of the through hole. ### Claim 16 (depends on 15) The side sill assembly of claim 15, wherein the outside circumference of the battery mounting nut and the inside circumference of the through hole are bonded by CO2 welding. ### Claim 17 (depends on 12) The side sill assembly of claim 12, wherein a width of the lower member is ranged from a width directional outside end portion of the vehicle of the lower surface up to a portion where the welding surface is formed.