Side sill assembly for eco-friendly vehicle

1. A side sill assembly for an eco-friendly vehicle, the side sill assembly comprising:

a center member fastened to a side surface of a center floor panel of the eco-friendly vehicle;

a front outer member fastened to a front end of the center member; and

a front inner member located inside the front outer member and fastened to a front apron and a dash panel,

wherein a battery frame fastened to a side surface of a high voltage battery is fastened to at least one of the front inner member and the center member in a longitudinal direction of the vehicle, and

wherein in a portion in which the center member and the front inner member overlap each other, the battery frame is fastened to the front inner member.

2. The side sill assembly of claim 1 ,

wherein a rear end of the front inner member is located behind a rear end of the front outer member,

wherein the battery frame is fastened to the front inner member in front of the rear end of the front outer member.

3. The side sill assembly of claim 1 ,

wherein the battery frame is fastened to the front inner member by a fastening bolt penetrating the battery frame and fastening to the front inner member.

4. The side sill assembly of claim 1 ,

wherein the battery frame is fastened to the front inner member by a fastening bolt penetrating the battery frame and front inner member and fastening to the center member.

5. The side sill assembly of claim 1 ,

wherein a bottom surface of the center member is in surface contacted with the front inner member.

6. The side sill assembly of claim 1 ,

wherein an inner end of the front inner member is bended to upward and contacted with a side surface of the center member.

7. The side sill assembly of claim 1 ,

wherein, from behind a rear end of the front inner member, the battery frame is fastened to the center member by a fastening bolt penetrating the battery frame and fastening to the center member.

8. The side sill assembly of claim 1 ,

wherein a bottom surface of the center member includes at least one guide hole arranged in a longitudinal direction of the vehicle, and

the battery frame includes a guide pin inserted into the guide hole.

9. A side sill assembly for an eco-friendly vehicle, the side sill assembly comprising:

a center member fastened to a side surface of a center floor panel of the eco-friendly vehicle;

a front outer member fastened to a front end of the center member; and

a front inner member located inside the front outer member and fastened to a front apron and a dash panel,

wherein a battery frame fastened to a side surface of a high voltage battery is fastened to at least one of the front inner member and the center member in a longitudinal direction of the vehicle,

wherein the center member comprises:

an outer housing formed on a widthwise outside of the vehicle;

an inner housing located inside the outer housing and having an upper end and a lower end connected to the outer housing such that a cylindrical structure is formed;

a main vertical partition wall configured to partition an inner space formed by the outer housing and the inner housing in a width direction of the vehicle;

a main horizontal partition wall configured to partition the inner space formed by the outer housing and the inner housing in the width direction of the vehicle, and cross the main vertical partition wall; and

a floor panel fastening portion fastened to the center floor panel, wherein the floor panel fastening portion extends from the inner housing toward an inside of the vehicle, and

wherein the main horizontal partition wall is located at a position lower than the floor panel fastening portion.

10. The side sill assembly of claim 1 ,

wherein the front outer member comprises:

an outer housing formed on a widthwise outside of the vehicle;

an inner housing located inside the outer housing and having an upper end and a lower end connected to the outer housing such that a cylindrical structure is formed;

at least one main horizontal partition wall configured to vertically partition a space formed by the outer housing and the inner housing; and

a vertical partition wall configured to partition a space of the lower portion of the horizontal partition wall located on a lowermost end among the at least one partition wall in a width direction of the vehicle.

11. A side sill assembly for an eco-friendly vehicle, the side sill assembly comprising:

a center member fastened to a side surface of a center floor panel of the eco-friendly vehicle;

a front outer member fastened to a front end of the center member;

a front inner member located inside the front outer member and fastened to a front apron and a dash panel, wherein a battery frame fastened to a side surface of a high voltage battery is fastened to at least one of the front inner member and the center member in a longitudinal direction of the vehicle;

a rear outer member fastened to a rear end of the center member; and

a rear inner member that is located inside the rear outer member and fastened to a rear floor panel for the vehicle,

wherein in a portion in which the center member and the rear inner member overlap each other, the battery frame is fastened to the rear inner member.

12. The side sill assembly of claim 11 ,

wherein a front end of the rear inner member is located in front of a front end of the rear outer member,

wherein the battery frame is fastened to the rear inner member in front of the front end of the rear outer member.

13. The side sill assembly of claim 11 ,

wherein, in front of a front end of the rear inner member, the battery frame is fastened to the center member by a fastening bolt penetrating the battery frame and fastening to the center member.

14. The side sill assembly of claim 11 ,

wherein the front outer member and the rear outer member have same cross sections.

15. The side sill assembly of claim 11 ,

wherein the center member, the front outer member, and the rear outer member are manufactured by extrusion.