Vehicle body structure

Abstract

The aim is to provide a vehicle body structure that suppresses the weight increase of the cross members and can firmly support the seats without obstructing the passenger space. [Solution] The vehicle body structure comprises a vehicle frame 2 and a battery case 10 that houses a battery B and is attached to the vehicle frame 2. The battery case 10 has a housing section 11 for housing the battery B and a battery cover 12 that covers the housing section 11 from above. A seat support structure 50 that supports the seat of the vehicle 1 is installed on the upper surface 13 of the battery cover 12, and a plurality of cover reinforcing frames 60 are installed on the back surface 14 of the battery cover 12. At least one of the plurality of cover reinforcing frames 60 is positioned to overlap the seat support structure 50 in the vertical direction.

Description

Technical Field

[0001] The present invention relates to a vehicle body structure.

Background Art

[0002] In recent years, in order to enable more people to access affordable, reliable, sustainable, and advanced energy, research and development on weight reduction that contributes to energy efficiency has been carried out. Conventionally, a front seat front cross member and a front seat rear cross member that support the front seat are installed between the left and right door sills, and a vehicle body structure is known in which an upper cover plate of a battery pack is connected from below the front seat front cross member and the front seat rear cross member (for example, Patent Document 1, etc.).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in this technology related to weight reduction, it is an issue to suppress the weight of the cross member while enabling the seat to be firmly supported. However, the conventional technology has a structure in which the seat is supported by a cross member installed above the cover plate. For this reason, it is necessary to firmly form the cross member so as to withstand the input from the seat, which has led to an increase in the weight of the cross member. Also, when the shape is enlarged to firmly form the cross member, it also leads to an obstruction of the occupant space, and there is room for further improvement. This invention aims to provide a vehicle body structure that suppresses the weight increase of the cross member and can firmly support the seat without obstructing the passenger space. Ultimately, this contributes to energy efficiency. [Means for solving the problem]

[0005] To solve the aforementioned problems, the vehicle body structure of the present invention is a vehicle body structure comprising a vehicle body frame and a battery case that houses a battery and is attached to the vehicle body frame. The battery case has a housing section for housing a battery and a battery cover that covers the housing section from above. A seat support structure for supporting the vehicle's seat is installed on the upper surface of the battery cover, and a plurality of cover reinforcing frames are installed on the back surface of the battery cover. Furthermore, at least one of the plurality of cover reinforcing frames is positioned to overlap the seat support structure in the vertical direction. [Effects of the Invention]

[0006] According to the present invention, a vehicle body structure is provided that suppresses the weight increase of the cross member and can firmly support the seat without obstructing the passenger space. [Brief explanation of the drawing]

[0007] [Figure 1] This is an exploded perspective view of a vehicle body structure according to an embodiment of the present invention. [Figure 2] This is a perspective view showing the top surface of the battery cover in the vehicle body structure of the embodiment. [Figure 3] This is a perspective view illustrating the structure of the back of the battery cover. [Figure 4] This is a cross-sectional view along the line IV-IV in Figure 2, which illustrates the configuration of the main part. [Figure 5] This is a cross-sectional view along the VV line in Figure 2, which illustrates the configuration of the main parts. [Modes for carrying out the invention]

[0008] Hereinafter, one embodiment of the present invention will be described with reference to the drawings as appropriate. In the description, identical elements will be given the same number, and redundant explanations will be omitted. When describing direction, the description will be based on the front, rear, left, right, up, and down directions as seen from the driver of the vehicle. Note that the vehicle width direction and the left-right direction are synonymous.

[0009] Figure 1 shows the vehicle body structure used in the vehicle 1 of the embodiment. Vehicle 1 mainly comprises a body frame 2 that forms the lower part, a body 100 that forms the upper part and creates a passenger compartment, and a battery case 10 that houses the battery B and is attached to the body frame 2.

[0010] The vehicle frame 2 has a pair of side sills 3, 3 that extend in the longitudinal direction of the vehicle from both the left and right sides of the dash panel 2a located at the front of the passenger compartment. A battery case 10 is mounted between the side sills 3, 3. The battery case 10 has a recessed housing portion 11 for housing the battery B, and a flat battery cover 12 that covers the housing portion 11 from above. In this embodiment, the front edge 12a of the battery cover 12 is connected to the lower edge of the dash panel 2a. The battery cover 12 also constitutes the floor panel of the vehicle body.

[0011] As shown in Figure 2, a seat support structure 50 that supports the seat 40 of the vehicle 1 (see Figure 5) is installed on the upper surface 13 of the battery cover 12. The seat support structure 50 of the embodiment includes a cross member 4 extending in the vehicle width direction at an intermediate position in the vehicle's longitudinal direction, a pair of inner support frames 7 provided near the center of the cross member 4 in the vehicle width direction, and a pair of outer support frames 8 provided near the left and right side edges of the battery cover 12 in the vehicle width direction.

[0012] Of these, the cross member 4 has a hat-shaped cross section, and the flange portions 4d, 4d formed on both sides are connected to the upper surface 13 of the battery cover 12. The cross member 4 also has a cross member ridge portion 4c extending in the vehicle width direction between the upper surface 4a and the side wall (see Figure 4). Each cross member ridge portion 4c is formed in a straight line continuously in the vehicle width direction, from the left side end 4b to the right side end 4b, without bending in the vertical direction.

[0013] Furthermore, in this embodiment, as shown in Figure 2, a plurality of seat support frames 6 are arranged on the upper surface 13 of the battery cover 12, intersecting and connecting with the cross member 4. The seat support frame 6 includes a pair of inner support frames 7, 7 located near the center in the vehicle width direction, and a pair of outer support frames 8, 8 located near the left and right side edges of the battery cover 12 in the vehicle width direction.

[0014] The inner support frame 7 and outer support frame 8 on the right side of the vehicle work together to support the right front seat 40. The other inner support frame 7 and outer support frame 8 on the left side of the vehicle work together to support the left front seat 40. Each seat 40 is provided with a pair of left and right seat slide rails 41 at its base, allowing the seat surface to slide in the front-to-rear direction of the vehicle. Furthermore, the total length of the inner support frame 7 and outer support frame 8 in this embodiment is set to be approximately the same as the total length of the seat slide rails 41.

[0015] As shown in Figure 2, the inner support frames 7 are arranged in pairs in the center of the vehicle width direction. The inner support frames 7 intersect with the cross members 4 and are formed continuously in the vehicle's longitudinal direction. The inner support frames 7 are formed with a hat-shaped cross section that opens downwards, and are larger in the vertical dimension than the cross members 4. In addition, flange portions 7a, 7a are formed on the left and right sides of the inner support frames 7 along their entire length in the vehicle width direction. The inner support frame 7 is disposed so as to straddle the cross member 4 from above, and is fixed to the upper surface 13 of the battery cover 12 together with the cross member 4 by connecting the flange portions 7a, 7a to the upper surface 13 of the battery cover 12.

[0016] Furthermore, the intermediate portion in the front-rear direction of the inner support frame 7 engages the concave portion on the lower surface side with the cross member 4 from above, and joins the flange portions located on the left and right to the upper surface and the front and rear side walls of the cross member 4. Thereby, the inner support frame 7 is in a state orthogonal to the cross member 4, and the frame ridge line portion 7e of the inner support frame 7 and the cross member ridge line portion 4c of the cross member 4 are separated in the vertical direction (see FIG. 5) and intersect in a top view. The inner support frame 7 extends from the cross member 4 by substantially the same length in the vehicle front-rear direction, and is fixed to the upper surface 13 of the battery cover 12 respectively.

[0017] Furthermore, seat mounting brackets 9, 9 are provided at the front end portion and the rear end portion of the inner support frame 7 respectively. The front end portion and the rear end portion of the seat slide rail 41 are attached to the seat mounting brackets 9, 9, and support the seat 40 of the vehicle 1 from below respectively. Also, as shown in FIG. 2, the front end portion of the inner support frame 7 is spaced apart without extending forward of the vehicle to reach the dash panel 2a. Thereby, the front end portion of the inner support frame 7 is not connected to the dash panel 2a.

[0018] Furthermore, the vehicle body structure of the embodiment includes a rear cross member 5 as one of the seat support structures 50. The rear cross member 5 is provided in parallel to the upper surface 13 of the battery cover 12 at a predetermined interval in the vehicle front-rear direction from the cross member 4. The rear end portion of the inner support frame 7 is spaced apart without extending to reach the rear cross member 5. Thereby, the rear end portion is not connected to the rear cross member 5.

[0019] Furthermore, the vehicle body structure of the embodiment includes a reinforcing member 20 as one of the seat support structures 50. The reinforcing member 20 has a hat-shaped cross section that opens downwards and extends in the vehicle width direction at the upper surface 13 of the battery cover 12, at an intermediate position between the cross member 4 and the rear cross member 5. The reinforcing member 20 connects the rear ends of a pair of adjacent inner support frames 7, 7 in the width direction.

[0020] Furthermore, the reinforcing member 20 is fixed by connecting its flange portions located at the front and rear of the vehicle to the upper surface 13 of the battery cover 12. The reinforcing member 20 also connects the rear ends of a pair of adjacent inner support frames 7, 7. As a result, the reinforcing frame 20, together with the cross member 4 and the pair of inner support frames 7, 7, exhibits a rectangular shape when viewed from above. This further strengthens the connection between the inner support frames 7, 7 that support the left and right seats 40. The load applied from one of the seats 40 to the seat support frame 6 is then transmitted to the inner support frame 7 of the other adjacent seat 40 via the inner support frame 7 and the reinforcing member 20 or cross member 4, and distributed in the vehicle width direction.

[0021] Furthermore, the outer support frame 8, which is located outside the inner support frame 7 in the vehicle width direction, is positioned along the inside of the side sill 3. As shown in Figure 2, the outer support frame 8 has two frame sections that are divided into front and rear sections. Each outer support frame 8 in this embodiment has a hat-shaped cross-section that opens downwards, and is arranged in a line in the front-to-back direction and joined to the upper surface 13 of the battery cover 12 with equal lengths.

[0022] In this embodiment, the outer support frame 8 is divided into sections located midway in the front-rear direction, with opposing flange portions joined vertically to the upper surface of the cross member 4. Seat mounting brackets 9, 9 are provided at the front and rear ends of each outer support frame 8. The front and rear ends of the seat slide rail 41 are then attached to the seat mounting brackets 9,9 from above. As a result, the outer support frame 8 supports the seat 40 from below.

[0023] Furthermore, as shown in Figure 2, the front end of the outer support frame 8 is spaced apart and does not extend forward to the dash panel 2a shown in Figure 1. Therefore, the front end is not connected to the dash panel 2a. Similarly, the rear end of the outer support frame 8 is spaced apart and does not extend to the rear cross member 5. Therefore, the rear end is not connected to the rear cross member 5.

[0024] Furthermore, in the vehicle body structure of this embodiment, the left and right side ends 4b, 4b of the cross member 4 are connected to the side sill 3 via extension members 30 that are pre-installed on the left and right sides of the side sill 3. As a result, the load applied to the inner support frame 7 and outer support frame 8 that support the seat 40 is transmitted and distributed to the vehicle body frame 2 located on the left and right sides of the vehicle via the cross member 4 and extension member 30, respectively.

[0025] As shown in Figure 3, multiple cover reinforcing frames 60 are installed on the back surface 14 of the battery cover 12. At least one of the multiple cover reinforcing frames 60 is positioned to overlap with the sheet support structure 50 in the vertical direction. In the vehicle body structure of this embodiment, the cover reinforcing frame 60 includes a pair of inner reinforcing frames 61, 61 and a pair of outer reinforcing frames 62, 62.

[0026] Furthermore, the inner reinforcing frame 61 (see Figure 5) and outer reinforcing frame 62 (see Figure 4) of the cover reinforcing frame 60 each have a hat-shaped cross-section that opens upwards, and as shown in Figure 3, they each extend in the front-rear direction of the vehicle 1.

[0027] As shown in Figure 4, each outer reinforcing frame 62 forms flange portions 62e, 62e along its entire length on both the left and right sides in the vehicle width direction. The flange portions 62e, 62e are connected to and fixed to the back surface 14 of the battery cover 12. The outer reinforcing frame 62, together with the battery cover 12, forms a closed section with a rectangular cross-sectional shape. In this embodiment, the width dimension of the closed section formed by the outer reinforcing frame 62 and the battery cover 12 is set to be larger than the height dimension.

[0028] As shown in Figure 5, each inner reinforcing frame 61 has flange portions 61c, 61c extending along its entire length on both the left and right sides in the vehicle width direction. The flange portions 61c, 61c are connected to and fixed to the back surface 14 of the battery cover 12. Together with the battery cover 12, the inner reinforcing frame 61 forms a closed cross-section with a rectangular cross-sectional shape. In this embodiment, the closed cross-section formed by the inner reinforcing frame 61 and the battery cover 12 is set such that the width dimension is greater than the height dimension.

[0029] Furthermore, as shown in Figure 5, the left-right width dimension of the inner reinforcing frame 61 is formed to be equivalent to the left-right width dimension of the inner support frame 7, and at least a portion of it is configured to intersect in the vehicle width direction.

[0030] Furthermore, the vertical dimensions of the inner reinforcing frame 61 and the outer reinforcing frame 62 in this embodiment are set to be smaller than the vertical dimensions of the cross member 4. The vertical dimensions of the inner reinforcing frame 61 are set to be equal to the vertical dimensions of the outer reinforcing frame 62.

[0031] As shown in Figure 5, the front end 61a of each inner reinforcing frame 61 is positioned to overlap with the rear end of the inner support frames 7, 7 that constitute the sheet support structure 50 and the side end of the reinforcing member 20, respectively. Furthermore, as shown in Figure 3, the rear ends 61b, 61b of the inner reinforcing frame 61 extend toward the rear edge 12b of the battery cover 12 and are aligned with the vehicle longitudinal position of the rear ends 62b, 62b of the outer reinforcing frames 62, 62.

[0032] Furthermore, in the vehicle body structure of this embodiment, as shown in Figure 3, the front ends 62a, 62a of the outer reinforcing frames 62, 62 of the cover reinforcing frame 60 extend to the front edge 12a of the battery cover 12. The outer reinforcing frame 62 is installed from the front edge 12a to the rear edge 12b of the battery cover 12. Furthermore, the outer edges of the front ends 62a, 62a are connected to front extensions 62c, 62c that extend outward in the vehicle width direction. Furthermore, the outer edges of the rear ends 62b, 62b of the outer reinforcing frames 62, 62 are connected to rear extensions 62d, 62d that extend outward in the vehicle width direction. As a result, the rigidity of both the front edge 12a and the rear edge 12b of the battery cover 12 is improved.

[0033] As shown in Figure 3, each outer reinforcing frame 62 of the cover reinforcing frame 60 extends in the front-rear direction, intersecting the cross member 4 of the seat support structure 50 (see Figure 2) at an intermediate position in the front-rear direction, and the battery cover 12 in the vertical direction. Therefore, the cross member 4, which extends in the vehicle width direction, is firmly supported from below by the outer reinforcing frame 62, which extends in the front-rear direction, thereby improving the mounting rigidity of the seat 40 attached to the cross member 4.

[0034] As shown in Figure 2, the cross member 4 of the embodiment intersects the inner support frame 7 and the outer support frame 8 in the front-rear direction at an intermediate position, and is supported from below by the outer reinforcing frame 62 and the inner reinforcing frame 61 which extend from the cross member 4 in the front-rear direction. Therefore, the load of the sheet 40 applied from the inner support frame 7 and the outer support frame 8 can be efficiently received and distributed and supported over a wide area in the front-rear direction of the battery cover 12.

[0035] Furthermore, the upper surface 13 of the battery cover 12 has a rear cross member 5 that supports the rear seat (not shown) among the multiple seats 40. The inner reinforcing frames 61, 61 and outer reinforcing frames 62, 62 of the cover reinforcing frame 60 intersect with the rear cross member 5, respectively. Furthermore, the rear end 61b of the inner reinforcing frame 61 and the rear end 62b of the outer reinforcing frame 62 extend from the rear cross member 5 towards the rear edge 12b of the battery cover 12. This allows the front and rear seats 40 to be supported by the same inner reinforcing frame 61 and outer reinforcing frame 62 extending in the front-rear direction. Thus, an increase in the number of parts can be suppressed, and an increase in weight can also be suppressed.

[0036] In the vehicle body structure of this embodiment, as shown in Figure 1, the battery case 10 is attached to the vehicle body frame 2 that constitutes the lower part of the vehicle 1. A battery cover 12 is fitted to the battery case 10 so as to cover the top surface of the housing 11 in which the battery B is housed. Multiple cover reinforcing frames 60 are pre-attached to the back surface 14 of the battery cover 12. In this embodiment, the vertical dimensions of the inner reinforcing frame 61 and the outer reinforcing frame 62 that constitute the cover reinforcing frame 60 are set to be smaller than the vertical dimensions of the cross member 4. This allows a gap to be formed between them and the upper surface of the battery B housed in the battery case 10. The battery cover 12 is secured around the housing 11 by multiple fastening members such as screws, thereby closing the housing 11.

[0037] Furthermore, extension members 30, as shown in Figure 2, are pre-installed projecting inward from the intermediate positions in the vehicle's longitudinal direction on the side sills 3 located on both the left and right sides of the vehicle frame 2. A cross member 4 of the seat support structure 50 is joined and fixed to the upper surface 13 of the battery cover 12. The left and right ends of the cross member 4 are joined from above the extension members 30, and the cross member 4 is fixed to the intermediate part of the side sill 3 in the longitudinal direction. Furthermore, the rear cross member 5 of the seat support structure 50 is joined and fixed to the upper surface 13 of the battery cover 12 at a predetermined distance from the cross member 4 in the vehicle's longitudinal direction.

[0038] As shown in Figure 2, among the multiple cover reinforcing frames 60 installed on the back surface 14 of the battery cover 12, the front end 61a of the inner reinforcing frame 61 is positioned to overlap vertically with the rear end of the inner support frame 7, which extends from the midpoint in the vehicle width direction of the cross member 4 that extends in the vehicle width direction toward the rear of the vehicle, and the rear ends 61b, 61b extend toward the rear of the vehicle body.

[0039] As shown in Figure 5, the inner support frame 7 has a roughly hat-shaped cross-section and forms a closed cross-section with the upper surface 13 of the battery cover 12. The inner reinforcing frame 61 also has a hat-shaped cross-section and forms a closed cross-section with the back surface 14 of the battery cover 12. The portion of the inner reinforcing frame 61 that forms a closed cross-section overlaps and intersects with the closed cross-section formed by the inner support frame 7 in the vertical direction, sandwiching the battery cover 12.

[0040] Furthermore, the closed cross section formed between the hat-shaped cross member 4 and the upper surface 13 of the battery cover 12 is provided in a continuous, straight line in the vehicle width direction, extending from the left side end 4b to the right side end 4b, without bending in the vertical direction. As shown in Figure 4, the outer reinforcing frame 62 of the cover reinforcing frame 60, which has a hat-shaped cross-section, is provided so that the closed cross-section it forms with the back surface 14 of the battery cover 12 intersects vertically with the closed cross-section formed by the cross member 4. As shown in Figure 3, the outer reinforcing frame 62 is installed from the front edge 12a of the battery cover 12 to the rear edge 12b of the battery cover 12.

[0041] In this way, the battery cover 12 is sandwiched from above and below by the sheet support structure 50 and the cover reinforcing frame 60, thereby improving its rigidity. Therefore, the cross member 4, which extends in the vehicle width direction, is firmly supported from below by the inner reinforcing frame 61 and outer reinforcing frame 62, which extend in the front-rear direction, and can distribute and support the load applied from the seat over a wide area in the front-rear direction of the battery cover 12. Therefore, the seat support structure 50 can effectively receive the load from the seat, suppressing the increase in the weight of the seat support structure 50 and making the vehicle body lighter.

[0042] Furthermore, since the cover reinforcement frame 60 is positioned on the underside of the battery cover 12, it does not obstruct the interior space of the vehicle. Furthermore, in this embodiment, the vertical dimensions of the inner reinforcing frame 61 and the outer reinforcing frame 62 are set to be smaller than the vertical dimensions of the cross member 4. This makes it easy to prevent interference with the battery B housed in the recessed housing portion 11 of the battery case 10. As a result, the vehicle 1 to which the present invention is applied can exhibit practically beneficial effects, such as being able to obtain the desired seat support rigidity without obstructing the passenger space while suppressing an increase in vehicle weight.

[0043] As described above, the vehicle body structure of the present invention, as shown in Figure 1, comprises a vehicle body frame 2 and a battery case 10 that houses a battery B and is attached to the vehicle body frame 2. The battery case 10 has a housing section 11 for housing the battery B and a battery cover 12 that covers the housing section 11 from above. As shown in Figure 5, a seat support structure 50 that supports the seat 40 of the vehicle 1 is installed on the upper surface 13 of the battery cover 12. Furthermore, multiple cover reinforcement frames 60 are installed on the back surface 14 of the battery cover 12. As shown in Figure 3, at least one of the multiple cover reinforcement frames 60 is positioned to overlap the sheet support structure 50 in the vertical direction.

[0044] The vehicle body structure of the present invention, configured in this manner, can suppress the weight increase of the seat support structure 50 and provide a vehicle body structure that can firmly support the seat 40 without obstructing the passenger space. More specifically, multiple cover reinforcement frames 60 are installed on the back surface 14 of the battery cover 12, and at least one of the cover reinforcement frames 60 is positioned to overlap with the sheet support structure 50 in the vertical direction. Therefore, the battery cover 12 is sandwiched from above and below by the sheet support structure 50 and the cover reinforcing frame 60, which improves rigidity.

[0045] Furthermore, the seat support structure 50 is supported from below by the overlapping cover reinforcement frame 60. As a result, the seat support structure 50 can effectively receive the load from the seat, suppressing the increase in the weight of the seat support structure 50 and making the vehicle body lighter.

[0046] Furthermore, since the cover reinforcement frame 60 is positioned on the underside of the battery cover 12, it does not obstruct the interior space of the vehicle. As a result, the vehicle 1 to which the present invention is applied can obtain the desired seat support rigidity without obstructing the passenger space while suppressing an increase in vehicle weight.

[0047] Furthermore, as shown in Figure 3, the cover reinforcement frame 60 extends in the front-rear direction, and the front end 61a of the inner reinforcement frame 61 is positioned to overlap with the rear end of the inner support frame 7 which extends from the seat support structure 50, and is formed to extend towards the rear of the vehicle body. Therefore, the cover reinforcement frame 60 supports the seat support structure 50 from below and reinforces the battery cover 12 over a wide area extending to the rear, thereby increasing its rigidity.

[0048] Furthermore, the seat support structure 50 has a cross member 4 that extends in the vehicle width direction. At least one of the cover reinforcing frames 60 extends in the front-rear direction and intersects with the cross member 4. Therefore, the cross member 4, which extends in the vehicle width direction, is firmly supported from below by the outer reinforcing frame 62, which extends in the front-rear direction, and can distribute and support the battery cover 12 over a wide area in the front-rear direction. Consequently, the support rigidity of the seat 40 attached to the cross member 4 can be further improved.

[0049] Furthermore, the upper surface 13 of the battery cover 12 has a rear cross member 5 that supports the rear seat (not shown) of the seat 40. The cover reinforcement frame 60 intersects with the rear cross member 5. In this way, the cover reinforcement frame 60 intersects with the seat support structure 50 from below, supporting the battery cover 12 from the back surface 14. Therefore, it can efficiently receive the load of the rear seat and distribute and support it over a wide area of ​​the battery cover 12. Therefore, it is possible to suppress the weight increase of the rear cross member 5 and firmly support the rear seats without obstructing the passenger space.

[0050] The cover reinforcement frames 60 are each formed with a hat-shaped cross-section that opens upwards. The cover reinforcement frames 60 are connected to the back surface 14 of the battery cover 12 to form a closed cross-section. Therefore, a closed cross-section is formed, which effectively improves the rigidity of the battery cover 12. Furthermore, in this embodiment, the vertical dimensions of the inner reinforcing frame 61 and the outer reinforcing frame 62 are set to be smaller than the vertical dimensions of the cross member 4. As a result, the rigidity of the battery cover 12 can be effectively improved without interfering with the battery B housed in the battery case 10.

[0051] Furthermore, at least one of the cover reinforcement frames 60 is installed extending from the front edge 12a of the battery cover 12 to the rear edge 12b of the battery cover 12. Therefore, the rigidity of the battery cover 12 can be improved over a wide area in the front-to-back direction.

[0052] The present invention is not limited to the embodiments described above, and various modifications are possible. The embodiments described above are illustrative examples provided to facilitate understanding of the present invention, and are not necessarily limited to those comprising all the configurations described. Furthermore, it is possible to replace parts of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add configurations from other embodiments to the configuration of one embodiment. In addition, it is possible to delete parts of the configuration of each embodiment, or to add or replace other configurations. Possible modifications to the above embodiments are, for example, as follows.

[0053] The vehicle body structure of the embodiment is configured such that the cover reinforcing frame 60 has a pair of inner reinforcing frames 61 and an outer reinforcing frame 62. However, the present invention is not particularly limited thereto. That is, the vehicle body structure of the present invention only requires that at least one of the cover reinforcing frames 60 be positioned to overlap the seat support structure 50 in the vertical direction, and the shape, number, and material of the multiple cover reinforcing frames provided on the back surface 14 of the battery cover 12 are not particularly limited. [Explanation of Symbols]

[0054] 1 vehicle 2. Vehicle frame 4 Cross Members 6-seat support frame 10 Battery Cases 11. Storage Unit 12 Battery Cover 13 Top side 14 Back side 40 sheets 50 Sheet support structure 60 Cover Reinforcement Frame B Battery

Claims

1. The vehicle frame and A battery case that houses the battery and is attached to the vehicle frame, In a vehicle body structure equipped with, The aforementioned battery case is A housing section for housing the aforementioned battery, It has a battery cover that covers the aforementioned housing from above, On the upper surface of the aforementioned battery cover, A seat support structure is installed to support the vehicle's seats. On the back of the aforementioned battery cover, Multiple cover reinforcement frames are installed, At least one of the multiple cover reinforcement frames is A vehicle body structure characterized by being positioned in a location that overlaps with the aforementioned seat support structure in the vertical direction.

2. The vehicle body structure according to claim 1, characterized in that the cover reinforcing frame extends in the front-rear direction, its front end is positioned to overlap with the rear end of the seat support structure, and it extends to the rear of the vehicle body.

3. The aforementioned seat support structure has a cross member extending in the vehicle width direction, The vehicle body structure according to claim 1, characterized in that at least one of the cover reinforcing frames extends in the front-rear direction and intersects with the cross member.

4. The upper surface of the battery cover has a rear cross member that supports the rear seat of the seat, The vehicle body structure according to any one of claims 1 to 3, characterized in that the cover reinforcing frame intersects with the rear cross member.

5. The aforementioned cover reinforcement frame is It is formed with a hat-shaped cross-section that opens upwards, The vehicle body structure according to claim 1, characterized in that it is connected to the battery cover to form a closed cross section.

6. The vehicle body structure according to claim 1, characterized in that at least one of the cover reinforcing frames is installed from the front edge of the battery cover to the rear edge of the battery cover.

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