KR-102963282-B1 - CROSS MEMBER FOR BATTERY CASE AND BATTERY CASE

Abstract

The present invention provides a cross member of a battery case comprising: a first frame portion; a second frame portion; and a connecting frame portion disposed between the first frame portion and the second frame portion and connecting the first frame portion and the second frame portion, wherein the connecting frame portion is made of a different material from the first frame portion and the second frame portion.

Inventors

• 정창균
• 박재헌
• 차명환
• 위상권

Assignees

• 주식회사 포스코

Dates

Publication Date

20260511

Application Date

20211105

Claims (16)

1. First frame section; 2nd frame section; and A connecting frame portion disposed between the first frame portion and the second frame portion and connecting the first frame portion and the second frame portion; is included. The above connecting frame part is composed of a material different from the first frame part and the second frame part, and The above connecting frame part is, Connecting body; A first insertion groove formed on one side of the above-mentioned connecting body and into which one side of the first frame part is inserted; and A cross member of a battery case comprising: a second insertion groove formed on the other side of the above-mentioned connecting body and into which one side of the second frame part is inserted.
2. In paragraph 1, A cross member of a battery case, wherein the first frame portion and the second frame portion are composed of a first material, and the connecting frame portion is composed of a second material different from the first material.
3. In paragraph 1, The first frame part, the second frame part, and the connecting frame part are made of a metal material, and A cross member of a battery case characterized in that the above connecting frame portion has a lower specific gravity than the above first frame portion and the above second frame portion.
4. In paragraph 3, A cross member of a battery case characterized in that the first thickness of the first frame portion and the second thickness of the second frame portion are thinner than the third thickness of the connecting frame portion.
5. In paragraph 1, A cross member of a battery case in which the first frame portion and the second frame portion are made of steel, and the connecting frame portion is made of aluminum or aluminum alloy.
6. delete
7. In paragraph 1, The vertical length of the first frame part is longer than the vertical length of the second frame part, and A cross member of a battery case characterized in that the first depth of the first insertion groove is greater than the second depth of the second insertion groove.
8. In paragraph 1, The above connecting body is a cross member of a battery case including an 'H-shaped' cross section.
9. In paragraph 1, the first frame part is, A first frame body having a lower portion inserted into the first insertion groove and having a 'U-shaped'cross-section; and A cross member of a battery case comprising: a pair of first flanges each formed extending in a direction extending away from the installation width of the first frame body from the upper side of the first frame body.
10. In Paragraph 9, The first frame body and the pair of first flanges are cross members of a battery case formed by folding a single plate in multiple stages.
11. In paragraph 1, the second frame part is, A second frame body having an upper portion inserted into the second insertion groove and having an 'inverted U-shaped'cross-section; and A cross member of a battery case comprising: a pair of second flanges each formed extending in a direction extending away from the installation width of the second frame body from the lower side of the second frame body.
12. In Clause 11, the above-mentioned second flange is, A 2-1 horizontal plate extending outward from the lower side of the above 2 frame body; A second vertical plate that intersects the second-1 horizontal plate and extends downward from the second-1 horizontal plate; and A cross member of a battery case comprising: a second-2 horizontal plate that intersects the second vertical plate and extends outward from the lower side of the second vertical plate.
13. In Clause 11, the above-mentioned second flange is, A second reinforcing member having a 'U-shaped' cross-section open toward the second side plate of the second frame body and forming a closed cross-section together with the second side plate; and A cross member of a battery case comprising: a second joining plate that is bent from the second reinforcing member and joined to the second side plate in a state where it is arranged parallel to be in contact with the second side plate.
14. In Paragraph 11, The above second frame body and the above pair of second flanges are cross members of a battery case formed by folding a single plate in multiple stages.
15. In paragraph 1, A cross member of a battery case further comprising: a fastening portion that is fastened by penetrating the first frame portion, the second frame portion, and the connecting frame portion.
16. Side members installed to surround the border portion; and A battery case comprising a cross member of a battery case described in any one of claims 1 to 5 and claims 7 to 15, which is formed to extend in the left-right direction to connect the opposing side members of the side member and is installed spaced apart in the front-rear direction.

Description

Cross member for battery case and battery case The present invention relates to a cross member of a battery case and a battery case. It should be noted that the content described in this section merely provides background information regarding the present invention and does not constitute prior art. The electric vehicle battery case serves to protect battery cells from external impacts that occur during vehicle operation. In the case of front and rear collisions, the vehicle body parts are stacked in layers around the battery case, making it relatively easy to prepare for the collision. However, in the case of side collisions, there is no protective structure other than the sill side of the vehicle body, so the battery case itself must be designed to strongly resist side collisions. Among the structural components of a battery case, the side frame and cross member are representative members designed to withstand side collisions. The side frame serves as the lateral rim of the battery case and simultaneously acts as a primary member resisting collisions. The cross member runs perpendicular to the side frame and traverses the interior of the battery case. The cross member is primarily positioned between battery modules and performs the role of supporting the side frame. (Patent Document 1) KR 10-0818057 B1 FIG. 1 is a perspective view illustrating a cross member according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the disassembled state of FIG. 1. Figure 3 is a cross-sectional view of Figure 1. Figure 4 is a cross-sectional view illustrating the disassembled state of Figure 3. FIG. 5 is a cross-sectional view of a cross member according to a second embodiment of the present invention. FIG. 6 is a perspective view illustrating a cross member according to a third embodiment of the present invention. Figure 7 is a cross-sectional view of Figure 6. FIG. 8 is a numerical analysis diagram of the load performance of a cross member according to the first embodiment of the present invention and a cross member according to a comparative example of the present invention. FIG. 9 is a diagram comparing the load performance (vertical axis: compressive strength, unit - KN, horizontal axis: time, unit - ms) of a cross member according to the first embodiment of the present invention and a cross member according to a comparative example of the present invention. FIG. 10 is a perspective view illustrating a battery case of the present invention. Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various different forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. In the drawings, the shapes and sizes of elements may be exaggerated for clearer explanation. Hereinafter, the components included in the cross member (10) of the battery case according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing a cross member (10) of a battery case according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing the disassembled state of FIG. 1. Fig. 3 is a cross-sectional view of Fig. 1, and Fig. 4 is a cross-sectional view showing the disassembled state of Fig. 3. A cross member (10) of a battery case according to a first embodiment of the present invention may include a first frame portion (100), a second frame portion (200), and a connecting frame portion (300). The first frame part (100) can be placed on the upper side. The second frame part (200) is positioned on the lower side, and the lower plate of the battery case can be connected. The connecting frame section (300) is positioned between the first frame section (100) and the second frame section (200) to connect the first frame section (100) and the second frame section (200). A first frame section (100), a connecting frame section (300), and a second frame section (200) are arranged in an up-and-down direction (D1), and the connecting frame section (300) can connect the first frame section (100) and the second frame section (200). The first frame part (100) and the second frame part (200) can be combined with each other while inserted into the insertion groove of the connecting frame part (300). The first frame part (100) and the second frame part (200) can be connected while inserted into an insertion groove formed in the connecting frame part (300), so that a worker can connect the members in a positioned state by a simple method of insertion, thereby improving workability at the site. The connecting frame part (300) may be made of a different material from the first frame part (100) and the second frame part