CONCEPT DESIGN

01 Design Directions
Development of a steel-based EV concept body and solutions for considering environmental changes and securing competitiveness in EVs beyond 2030.
As individuals have more leisure time, the number of people using camping and caravans increases , along with a growing preference for large, conveniently designed vehicles, we developed a concept car body for an SUV-type EV.
02 Challenges
03 Exterior Styling & Design Strategies

Car Body Design

01 for Full Frontal Rigid Barrier / Offset Deformable Barrier
Design Concept : Improvement of cabin space safety through progressive deformation control design of the front zone parts
02 for Small Overlap Rigid Barrier / Oblique Moving Deformable Barrier
Design Concept : Applying 2 types of PHS to enhance the passenger safety and minimize the cabin deformation
03 for Side Pole / Rear Crash
Design Concept : Application of UHSS and PHS in large components to improve cabin safety performance and weight reduction
04 for Side Moving Deformable Barrier / Roof Crush
Design Concept : Application of UHSS in vertical door beams to replace B-Pillar and into inner reinforcement of roof side part for roof crush test

Swivel Seat Frame Design

Design Concept : Application of UHSS into the swivel seat frame with BIS structure for lightweight, strength, and crashworthiness

Back Frame

Cushion Frame

Swivel System

Seat Track

Spec

  • 차량중량

    2,300kg

  • 주행거리

    700km

  • 베터리용량

    130kWh

BIW
차체 구조는 핫스탬핑 38%이상 포함, 590MPa 이상 소재 75%를 적용하여 동급사양 대비 10%이상 경량화 하였습니다.

특히 차체 중량을 줄인 센터필러리스 차체 구조는 주행거리 향상과 승객의 승하차 편의성까지 만족시켜줍니다.
Swivel Seat Frame
다기능시트프레임은 시트레일과 스위블 판넬에 1.2GPa을 적용하여 경량화와 구조 안전성을 확보했습니다.

다기능 시트프레임은 1.2GPa 시트레일 포함, 1.0GPa급 소재 64% 이상 적용하여 동급사양 대비 20%이상 경량화 하였습니다.
Crashworthiness
1.2GPa 3세대강과, 1.5GPa 고인성 핫스탬핑을 적용한 데쉬로어크로스멤버,에이프론,프론트필러, 프론트 사이드 멤버는 정면충돌 시 충돌에너지 흡수와 차체 변형을 최소화 합니다.

측면충돌 대응을 위한 1.5GPa 핫스탬핑과 MS강을 적용한 사이드실, 2GPa 핫스탬핑과 TWB를 적용한 시트 크로스멤버, 1.5GPa 핫스탬핑과 1.7GPa MS강을 적용한 루프 사이드 레일은 천정강도를 대응하여 차체 전반의 안전을 책임집니다.

Crashworthiness

01 Full Frontal Rigid Barrier / Offset Deformable Barrier
Full Frontal Rigid Barrier
Confirmation of the safety for passenger zone and battery zone
Offset Deformable Barrier
Acceptable deformation for dash upper, lower, and battery case
02 Small Overlap Rigid Barrier / Oblique Moving Deformable Barrier
Small Overlap Rigid Barrier
‘Good’ grade for the measurement locations of deformation
Oblique Moving Deformable Barrier
Satisfied deformation criteria of the dash and the upper / lower hinges of A-pillar
03 Side Rigid Pole / Rear Crash
Side Rigid Pole
Confirmation of the safety for passenger zone and no contact with battery cell
Rigid Moving Deformable Barrier
Allow of only contact between RR FLR SIDE MBR and battery case (not cell)
04 Side Moving Deformable Barrier / Roof Crush
Side Moving Deformable Barrier
Confirmation of sufficient survival space between B-pillar and longitudinal centerline of driver’s seat
Roof Crush
Confirmation of sufficient roof strength and satisfying SWR criteria as : 4.45

Static Stiffness (Torsion)

Variable Unit Result
L mm 1121.1
F1 N 1200
F2 N 1200
D1 mm 1.065
D2 mm 1.066
N kNm 5.381
θ deg 0.109
G kNm/deg 49.42

Dynamic Stiffness (Modal Frequency)

1st mode : Lateral bending

(37.8Hz)

2nd mode : Torsion

(47.8Hz)

3rd mode : Longitudinal bending

(49.9Hz)

Swivel Seat Frame Performance

01 Seat belt anchorage Strength
Evaluation item Condition Simulation results
Representative image Result Evaluation
Seat position 1
Frontmost /
Topmost
Strength   : 120%
Displacement : 266.1mm
Satisfied
Seat position 2
Rearmost /
Bottommost
Strength   : 120%
Displacement : 229.9mm
Satisfied
02 Sled Crash
Evaluation item Condition Simulation results
Representative image Result Evaluation
Frontal
1) 5% dummy
2) 50% dummy
5% dummy : ① 240.3 mm
                ② 49.1 mm
50% dummy : ① 204.5 mm
                 ② 43.6 mm
Satisfied
Rear
50% dummy
50% dummy : ① 6.4 ˚
                   ② 1.1 ˚
Satisfied
03 Stiffness
Evaluation item Condition Simulation results
Representative image Result Evaluation
Modal frequency 1st mode :
36Hz
Reference