# US 2025/0153554 A1 · Automotive body side structure

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- Number: US 2025/0153554 A1
- Document ID: US20250153554A1
- Status: Published application
- Kind: A1
- Application number: 18/861,992
- Filed: 2023-05-12
- Published: 2025-05-15
- Earliest claimed: 2022-06-03
- Assignees: Jfe Steel Corporation
- Applicants: Jfe Steel Corporation
- Inventors: Takanobu SAITO; Shotaro TSURU; Yoshitaka KURIAGE
- Web page: https://patentgrep.com/patent/US20250153554A1

## CPC

- B60K 1/04: of the electric storage means for propulsion
- B62D 21/02: comprising longitudinally or transversely arranged frame members
- B62D 21/157: {for side impacts}
- B62D 25/025: {Side sills thereof}
- B62D 25/2036: {the subunits being side panels, sills or pillars (B62D21/157 takes precedence)}
- B60K 2001/0438: {Arrangement under the floor}
- B60Y 2306/01: Reducing damages in case of crash, e.g. by improving battery protection
- 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)
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

An automotive body side structure includes collision energy absorptive parts provided on the outer peripheral side of a battery pack in a vehicle width direction in a protruding shape toward a vehicle outside in the vehicle width direction, and a recessed portion formed in the side sill to secure a space between the collision energy absorptive parts and the side sill. When a collision load is input to the side portion of the side sill, the timing at which the side sill and the collision energy absorptive parts contact each other is delayed, the collision load input to the side sill is transferred to the floor cross member until the side sill contacts the collision energy absorptive parts, after the side sill and the collision energy absorptive parts contact each other, the collision energy absorptive parts absorb the collision energy to reduce a load transferred to the battery pack.

## Claims

### Claim at position 1

-3. (canceled)

### Claim 4

An automotive body side structure comprising:
a side sill disposed at a vehicle outside in a vehicle width direction of a vehicle body and extending in a vehicle length direction;
a battery pack disposed at a lower part of the vehicle body vehicle inside in the vehicle width direction relative to the side sill; and
a floor cross member extending in the vehicle width direction and having a vehicle outside end portion in the vehicle width direction connected to the side sill, wherein
a steel sheet used for the side sill has a tensile strength of 980 MPa-class or higher,
the side sill has a closed cross section structure in which an opening of a side sill inner having a groove shape opened toward the vehicle outside in the vehicle width direction and an opening of a side sill outer having a groove shape opened toward vehicle inside in the vehicle width direction face each other, and a vehicle body upper side end portion and a vehicle body lower side end portion are joined,
the automotive body side structure includes
collision energy absorptive parts provided so as to face the closed cross section structure in a protruding shape toward the vehicle outside in the vehicle width direction on an outer peripheral side in the vehicle width direction of the battery pack, the collision energy absorptive parts being configured to be crushed to absorb collision energy when a collision load is input to the side sill from the vehicle outside in the vehicle width direction; and
a recessed portion having a recessed shape at a vehicle inner side of the closed cross section structure of the side sill in the vehicle width direction, the recessed shape being recessed toward the vehicle outside in the vehicle width direction in accordance with a protruding shape of the collision energy absorptive parts so as to secure a space between the collision energy absorptive parts and the side sill,
the collision energy absorptive parts and the recessed portion are provided along the side sill over an entire length of or a partial length of the vehicle length direction, and
when a collision load is input to the side sill from the vehicle outside in the vehicle width direction, the space between the side sill and the battery pack delays a timing at which the side sill and the collision energy absorptive parts come into contact with each other, and before the side sill and the collision energy absorptive parts come into contact with each other, the collision load input to the side sill is transferred to the floor cross member, and after the side sill and the collision energy absorptive parts come into contact with each other, the collision energy absorptive parts absorb the collision energy to reduce a load transferred to the battery pack.

### Claim 5 (depends on 4)

The automotive body side structure according to claim 4, wherein the recessed portion is formed in a region of ½ or less of the closed cross section structure of the side sill in a vehicle body height direction at a vehicle inner side in the vehicle width direction.

### Claim 6 (depends on 4)

The automotive body side structure according to claim 4, wherein the recessed portion has a depth of 50 mm or less in the vehicle width direction.

### Claim 7 (depends on 5)

The automotive body side structure according to claim 5, wherein the recessed portion has a depth of 50 mm or less in the vehicle width direction.