Battery Pack Mounting Structure of Electric Vehicle

Abstract

To provide a battery pack attachment structure of an electric motor car which enables improvement of workability for fixing a battery pack to a fixing member through a bracket.SOLUTION: A battery pack attachment structure of an electric motor car includes a vehicle body, a battery pack, an intermediate member, brackets, and fixing members. The battery pack is disposed at the upper side of the vehicle body. The intermediate member is provided with a first opening. Each bracket protrudes from the battery pack in a first direction intersecting with a vertical direction and is provided with a second opening. The fixing member penetrates from the vehicle body through the first opening and the second opening, protrudes upward, and fixes the bracket. The intermediate member has a guide part which can guide the bracket from a position where the fixing member is removed from the second opening to a position where the fixing member penetrates through the second opening.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a battery pack mounting structure for an electric vehicle.

Background Art

[0002] In electric vehicles such as hybrid vehicles (HV) and electric vehicles (EV), a battery pack is mounted. In the assembly process of the electric vehicle, the battery pack is fixed to a bolt provided on the vehicle body via a bracket provided on the battery pack.

[0003] In the assembly process of the electric vehicle, the battery pack and the bracket are suspended by, for example, a crane. Then, the hole provided in the bracket and the bolt are aligned, and the bolt is inserted into the hole of the bracket by lowering the battery pack and the bracket downward by the crane.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] With the heavy battery pack suspended by the crane, the hole of the bracket and the bolt are aligned. For this reason, it is not easy to accurately align the hole of the bracket and the bolt, and there is a risk that the assembly process will take time.

[0006] An object of the present invention is to provide a battery pack mounting structure for an electric vehicle capable of improving the workability of fixing a battery pack to a fixing member via a bracket.

Means for Solving the Problems

[0007] To achieve the above object, the battery pack mounting structure of the electric vehicle according to the present invention includes a vehicle body, a battery pack, an intermediate member, a bracket, and a fixing member. The battery pack is disposed above the vehicle body. The intermediate member is provided with a first opening. The bracket protrudes from the battery pack in a first direction intersecting the vertical direction and is provided with a second opening. The fixing member protrudes upward through the first opening and the second opening from the vehicle body and fixes the bracket. The intermediate member has a guide portion capable of guiding the bracket from a position where the fixing member is disengaged from the second opening to a position where the fixing member penetrates the second opening.

[0008] According to this configuration, when the bracket is fixed to the fixing member, the guide portion of the intermediate member guides the fixing member to a position where the fixing member penetrates the second opening. Thereby, the workability of fixing the battery pack to the fixing member via the bracket can be improved in the battery pack mounting structure of the electric vehicle.

[0009] Further, in the battery pack mounting structure of the electric vehicle according to the present invention, the intermediate member is provided with a first opening and has a first surface facing the bracket. The guide portion is located above the first surface and has two second surfaces spaced apart from each other in a second direction along the first surface, and two third surfaces extending between the two second surfaces and both ends of the first surface in the second direction. The two second surfaces extend obliquely with respect to the vertical direction so as to taper downward. The angle between the two second surfaces and the vertical direction is larger than the angle between the two third surfaces and the vertical direction. The upper ends of the two third surfaces are located above the upper end of the fixing member.

[0010] According to this configuration, the two second surfaces are formed in a tapered shape toward the space between the two third surfaces. Therefore, when the bracket is fixed to the fixing member, it first contacts one of the two second surfaces and is guided along the second surface toward the space between the two third surfaces. Then, the bracket contacts at least one of the two third surfaces and is guided downward along the third surface. While the bracket is being guided along the third surface, the fixing member is inserted into the second opening. And when the fixing member penetrates the second opening, the bracket contacts the first surface, and the arrangement of the bracket is completed. That is, when the bracket is fixed to the fixing member, it can be guided by the guide portion to the position where the fixing member penetrates the second opening. Therefore, the battery pack mounting structure of the electric vehicle can improve the workability of fixing the battery pack to the fixing member via the bracket.

[0011] Further, in the battery pack mounting structure of the electric vehicle according to the present invention, the bracket has a fourth surface facing the first surface and provided with a second opening, a fifth surface facing the third surface, and a curved surface extending in an arc shape between the fourth surface and the fifth surface.

[0012] According to this configuration, when the bracket is fixed to the fixing member, it contacts the second surface and the third surface of the guide portion on the curved surface. Therefore, the bracket can be prevented from getting caught by the guide portion as compared with the case where it contacts the guide portion at an acute angle, and thus it can be prevented that the rigidity of the intermediate member is reduced due to damage to the intermediate member.

Effect of the Invention

[0013] According to the present invention, the battery pack mounting structure of the electric vehicle can improve the workability of fixing the battery pack to the fixing member via the bracket.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

MODE FOR CARRYING OUT THE INVENTION

[0015] [Embodiment] Hereinafter, an embodiment of the electric vehicle 1 will be described in detail with reference to the accompanying drawings. The configurations of the embodiments described below, as well as the actions and results (effects) brought about by such configurations, are merely examples and are not limited to the content described below. In this specification, ordinal numbers are used only for distinguishing parts and members and do not indicate order or priority.

[0016] Hereinafter, the outline and structure of the electric vehicle 1 according to the embodiment will be described. FIG. 1 is a plan view showing a part of the electric vehicle 1 of one embodiment. FIG. 2 is a cross-sectional view showing a part of the electric vehicle 1 of the present embodiment along the line F2-F2 in FIG. 1.

[0017] As shown in FIGS. 1 and 2, the electric vehicle 1 includes a vehicle body 10, a battery pack 13, a plurality of brackets 14a, 14b, 14c, 14d, a waterproof tray 15, and a plurality of bolts 16a, 16b, 16c, 16d. The waterproof tray 15 is an example of an intermediate member. The bolt 16 is an example of a fixing member.

[0018] In the following figures, for convenience, three mutually orthogonal directions are defined. The +X direction and the -X direction are the front-rear direction of the electric vehicle 1, and the positive direction of the X axis is the front direction of the electric vehicle 1. The +Y direction and the -Y direction are the vehicle width direction (left-right direction) of the electric vehicle 1, and the positive direction of the Y axis is the right direction of the electric vehicle 1. The +Z direction and the -Z direction are the height direction (up-down direction) of the electric vehicle 1, and the positive direction of the Z axis is the upward direction of the electric vehicle 1.

[0019] The vehicle body 10 has a floor panel 17, a pair of cross members 18, and a pair of side members 19. The vehicle body 10 may have other components. The floor panel 17 forms, for example, the floor of the electric vehicle 1.

[0020] The pair of cross members 18 are spaced apart from each other in the front-rear direction (±X direction). Each of the pair of cross members 18 extends substantially in the left-right direction (±Y direction). The pair of side members 19 are spaced apart from each other in the left-right direction. Each of the pair of side members 19 extends substantially in the front-rear direction.

[0021] Both ends of the cross member 18 in the left-right direction are coupled to the pair of side members 19. For this reason, the pair of side members 19 are connected to each other by the cross member 18. Further, the floor panel 17 is coupled to the pair of cross members 18 and the pair of side members 19.

[0022] The battery pack 13 is a secondary battery (battery) that supplies electricity to various components of the electric vehicle 1, and is, for example, a lithium ion battery. The battery pack 13 has, for example, a plurality of cells and a case that houses the plurality of cells.

[0023] The battery pack 13 is disposed above the vehicle body 10. Specifically, the battery pack 13 is located between the pair of cross members 18 and between the pair of side members 19. The battery pack 13 is located below the front seat of the vehicle. Note that the battery pack 13 may be located below the rear seat of the vehicle.

[0024] The brackets 14a and 14b are connected to the lower end of the battery pack 13 and project forward (+X direction) or in the left-right direction (±Y direction) from the battery pack 13. The forward or left-right direction is a direction that intersects the up-down direction and is an example of a first direction. The bracket 14a and the bracket 14b are arranged at intervals in the left-right direction. The bracket 14a is spaced apart from the bracket 14b in the right direction.

[0025] Brackets 14c and 14d are connected to the lower end of the battery pack 13 and protrude rearward (-X direction) from the end portion of the battery pack 13 in the rearward (-X direction). The bracket 14c and the bracket 14d are arranged at intervals in the left-right direction (±Y direction). The bracket 14c is separated from the bracket 14d in the right direction (+Y direction).

[0026] FIG. 3 is a plan view showing the bracket 14b of the electric vehicle 1 of the present embodiment. FIG. 4 is a cross-sectional view showing the bracket 14b of the electric vehicle 1 of the present embodiment along the line F4-F4 in FIG. 3. As shown in FIG. 4, the bracket 14b has a first alignment surface 21, a second alignment surface 22, and a curved surface 23. The first alignment surface 21 is an example of the fourth surface. The second alignment surface 22 is an example of the fifth surface. On the other hand, the brackets 14a, 14c, and 14d have the first alignment surface 21. The brackets 14a, 14c, and 14d may further have the second alignment surface 22 and the curved surface 23.

[0027] The first alignment surface 21 is provided at the lower ends of the brackets 14a, 14b, 14c, and 14d protruding from the battery pack 13 and faces downward (-Z direction). The first alignment surface 21 is formed substantially flat.

[0028] Each of the brackets 14a, 14b, 14c, and 14d is provided with a through hole 25. The through hole 25 is an example of the second opening. The through hole 25 penetrates the brackets 14a, 14b, 14c, and 14d in the vertical direction (±Z direction) and opens to the first alignment surface 21. That is, the through hole 25 is provided in the first alignment surface 21.

[0029] The second alignment surface 22 is provided at the end of the bracket 14b in the left direction (-Y direction), and faces substantially leftward (-Y direction). The second alignment surface 22 is formed substantially flat. The second alignment surface 22 is formed, for example, by the end of a plate-shaped bracket 14b bent upward. Note that the second alignment surface 22 may be provided at the end of the bracket 14b in the right direction (+Y direction) and face substantially rightward (+Y direction).

[0030] The curved surface 23 extends in an arc shape between the first alignment surface 21 and the second alignment surface 22. The first alignment surface 21, the second alignment surface 22, and the curved surface 23 are formed continuously.

[0031] As shown in FIG. 1, the waterproof tray 15 is disposed above the vehicle body 10. The waterproof tray 15 protects the battery pack 13 from liquid, for example, inside the electric vehicle 1. Note that the intermediate member is not limited to the waterproof tray 15. For example, the intermediate member may be another component such as a holder that holds a harness extending from the battery pack 13.

[0032] The waterproof tray 15 is made of, for example, a synthetic resin. Thereby, even when the waterproof tray 15 comes into contact with the battery pack 13 during the assembly of the electric vehicle 1, damage to the battery pack 13 can be suppressed.

[0033] The waterproof tray 15 has a main body 30 and a plurality of fastening parts 31a, 31b, 31c, 31d. The main body 30 is formed in a box shape that is open upward and houses the battery pack 13. The main body 30 covers the battery pack 13 from below, in front, behind, on the left, and on the right.

[0034] A part of the main body 30 is disposed between at least a part of the battery pack 13 and the floor panel 17. Another part of the main body 30 is located between the battery pack 13 and one cross member 18 spaced apart from the battery pack 13 in the forward direction (+X direction). Therefore, when the electric vehicle 1 collides with an object in front, the waterproof tray 15 can absorb the impact on the battery pack 13.

[0035] Another part of the main body 30 is located between the battery pack 13 and the other cross member 18 spaced rearward (-X direction) from the battery pack 13. Also, another part of the main body 30 is located between the battery pack 13 and the pair of side members 19.

[0036] When the intermediate member is a holder instead of the waterproof tray 15, the intermediate member does not have to cover the battery pack 13. For example, most of the intermediate member does not have to be located between the battery pack 13 and the floor panel 17. In this case, the intermediate member is disposed, for example, around the battery pack 13.

[0037] The fastening portions 31a, 31b project forward (+X direction) or in the left-right direction (±Y direction) from the main body 30. The fastening portion 31a and the fastening portion 31b are arranged at intervals in the left-right direction (±Y direction). The fastening portion 31a is spaced apart from the fastening portion 31b in the right direction (+Y direction).

[0038] The fastening portions 31c, 31d project rearward (-X direction) from the rear end portion of the main body 30 in the rearward (-X direction). The fastening portion 31c and the fastening portion 31d are arranged at intervals in the left-right direction (±Y direction). The fastening portion 31c is spaced apart from the fastening portion 31d in the right direction (+Y direction).

[0039] The fastening portion 31b has a bottom surface 35 and a guide portion 36. The fastening portions 31a, 31c, 31d have the bottom surface 35. The bottom surface 35 is an example of the first surface. The bottom surface 35 faces upward (+Z direction). The bottom surface 35 is formed substantially flat. The bottom surfaces 35 of the fastening portions 31a, 31b, 31c, 31d face the corresponding brackets 14a, 14b, 14c, 14d.

[0040] A through hole 41 is provided in each of the fastening portions 31a, 31b, 31c, 31d. The through hole 41 is an example of the first opening. The through hole 41 penetrates the fastening portions 31a, 31b, 31c, 31d in the vertical direction (±Z direction) and opens to the bottom surface 35. That is, the through hole 41 is provided in the bottom surface 35.

[0041] The guide portion 36 is provided so as to cover the bracket 14b from the left - right direction (±Y direction). The guide portion 36 has two tapered surfaces 37 and two upright surfaces 38. The tapered surface 37 is an example of the second surface, and the upright surface 38 is an example of the third surface.

[0042] The two tapered surfaces 37 are located above the bottom surface 35 (+Z direction) and are spaced apart from each other in the left - right direction (±Y direction). The left - right direction is the direction along the bottom surface 35 and is an example of the second direction. The two tapered surfaces 37 extend in a substantially straight line and are obliquely upward so as to face each other. That is, the two tapered surfaces 37 extend obliquely with respect to the up - down direction (±Z direction) so as to taper downward (-Z direction).

[0043] The two upright surfaces 38 extend between the two tapered surfaces 37 and both ends of the bottom surface 35 in the left - right direction (±Y direction). The two upright surfaces 38 extend in a substantially straight line and are obliquely upward so as to face each other.

[0044] The two upright surfaces 38 extend obliquely with respect to the up - down direction (±Z direction) so as to taper downward. Note that the two upright surfaces 38 may extend in the up - down direction. The angle between the two tapered surfaces 37 and the up - down direction is larger than the angle between the two upright surfaces 38 and the up - down direction.

[0045] The lower (-Z direction) ends of the two upright surfaces 38 are connected to the ends of the bottom surface 35 in the left - right direction (±Y direction). Also, the upper (+Z direction) ends of the two upright surfaces 38 are connected to the lower ends of the tapered surfaces 37. That is, a continuous surface is formed by the two tapered surfaces 37, the two upright surfaces 38, and the bottom surface 35.

[0046] The bottom surface 35 and the guide portion 36 form a recess 39. The recess 39 is provided in the fastening portion 31b and is a depression that is open upward. Note that the recess 39 may be formed not only by the bottom surface 35 and the guide portion 36 but also by other parts.

[0047] The bracket 14b is received in the recess 39 of the fastening part 31b. In the recess 39, the bracket 14b is supported by the bottom surface 35 and is located between the two upright surfaces 38. That is, the first alignment surface 21 of the bracket 14b faces the bottom surface 35. Further, the second alignment surface 22 of the bracket 14b faces one of the two upright surfaces 38.

[0048] The guide part 36 may be provided not only in the fastening part 31b but also in the fastening parts 31a, 31c, and 31d. When the guide part 36 is provided in the fastening parts 31a, 31c, and 31d, the guide part 36 is provided so as to cover the left - right direction (±Y direction) of the brackets 14a, 14c, and 14d.

[0049] The bolts 16a and 16b are attached to, for example, a bracket integrated with the floor panel 17. The bracket is fixed to the main body of the floor panel 17 by, for example, welding. The bolts 16a and 16b are fixed to the bracket by, for example, welding. Note that the bolts 16a and 16b may be attached to the floor panel 17 by other means or may be attached to other parts of the vehicle body 10.

[0050] The bolts 16a and 16b penetrate through the through - holes 25 and 41 from the floor panel 17 (bracket) and project upward (+Z direction). By screwing nuts onto the bolts 16a and 16b, the brackets 14a, 14b and the fastening parts 31a, 31b are fixed to the bolts 16a and 16b. Thereby, the brackets 14a, 14b and the fastening parts 31a, 31b are attached to the floor panel 17 by fastening.

[0051] The bolts 16c and 16d penetrate through the through - holes 25 and 41 from a cross - member 18 spaced rearward (-X direction) from the battery pack 13 and project upward (+Z direction). The lengths of the bolts 16c and 16d are shorter than the lengths of the bolts 16a and 16b.

[0052] By screwing nuts onto bolts 16c and 16d, brackets 14c and 14d and fastening parts 31c and 31d are fixed to bolts 16c and 16d. As a result, brackets 14c and 14d and fastening parts 31c and 31d are attached to cross member 18 by fastening.

[0053] The tip ends of bolts 16a, 16b, 16c, and 16d taper upward. For example, the tip ends of bolts 16a, 16b, 16c, and 16d are formed in a conical shape or a hemispherical shape. Note that the shape of the tip ends of bolts 16a, 16b, 16c, and 16d is not limited to this.

[0054] Bolt 16b is located in recess 39. The two upright surfaces 38 face bolt 16b. The upper ends of the two upright surfaces 38 are located above the upper end of bolt 16b. Note that the position of the upper end of bolt 16b is not limited to this example.

[0055] An example of the mounting process of battery pack 13 will be described below. First, waterproof tray 15 is disposed above floor panel 17 so that bolts 16a, 16b, 16c, and 16d pass through through holes 41 of waterproof tray 15. Waterproof tray 15 made of synthetic resin is lightweight and can be easily disposed at a desired position.

[0056] Next, battery pack 13 is, for example, suspended by a crane and housed inside waterproof tray 15. At this time, first, alignment of bracket 14b is performed. The second alignment surface 22 or the curved surface 23 of bracket 14b is brought into contact with one of the two tapered surfaces 37 of guide portion 36 provided on fastening part 31b.

[0057] With bracket 14b in contact with tapered surface 37, battery pack 13 is moved downward. Bracket 14b is adjusted in position in the left - right direction (±Y direction) by moving downward along tapered surface 37. That is, the two tapered surfaces 37 guide bracket 14b toward the space between the two upright surfaces 38.

[0058] When the bracket 14b passes through the space between the two tapered surfaces 37, the bracket 14b contacts at least one of the two upright surfaces 38. With the bracket 14b in contact with the upright surface 38, the battery pack 13 is moved downward.

[0059] The bracket 14b is further adjusted in position in the left - right direction by moving downward along the upright surface 38. By contacting the bracket 14b, the two upright surfaces 38 cause the position of the through - hole 25 of the bracket 14b and the position of the bolt 16b to substantially coincide.

[0060] As the bracket 14b moves downward, the bolt 16b is inserted into the through - hole 25 of the bracket 14b. Then, with the bolt 16b passing through the through - hole 25, the bracket 14b contacts the bottom surface 35, and the bracket 14b is disposed in the recess 39.

[0061] When the tip of the bolt 16b has a conical shape, even if the central axis of the bolt 16b and the central axis of the through - hole 25 are misaligned, the bolt 16b can be easily inserted into the through - hole 25. Therefore, the workability of inserting the bolt 16b into the through - hole 25 is improved.

[0062] The long bolts 16a, 16b are inserted into the through - hole 25 earlier than the short bolts 16c, 16d. Therefore, the operator can first perform the alignment of the bolts 16a, 16b, which are easier to visually recognize from the same direction. When the bolts 16a, 16b are inserted into the through - holes 25 of the brackets 14a, 14b, the bolts 16c, 16d are less likely to interfere with the brackets 14c, 14d.

[0063] The two upright surfaces 38 restrict the movement of the bracket 14b in the left - right direction (±Y direction) and the rotation of the bracket 14b around the bolt 16b by contacting the bracket 14b. Also, the bolt 16b restricts the movement of the bracket 14b in the front - rear direction (±X direction) by being inserted into the through - hole 25. Therefore, when the bolt 16b is inserted into the through - hole 25, the positions of the through - holes 25 of the brackets 14a, 14c, 14d and the positions of the bolts 16a, 16c, 16d substantially coincide.

[0064] While the bracket 14b moves downward, the bolts 16a, 16c, 16d are inserted into the through - holes 25 of the brackets 14a, 14c, 14d. Therefore, the brackets 14c, 14d arranged behind (-X direction) the battery pack 13 do not require alignment.

[0065] As described above, the guide portion 36 guides the bracket 14b from the position where the bolt 16b is out of the through - hole 25 to the position where the bolt 16b penetrates the through - hole 25. Note that the means by which the guide portion 36 guides the bracket 14b is not limited to the above - described means. For example, the guide portion 36 may align the position of the bracket 14b in the front - rear direction (±X direction).

[0066] The bracket 14b is guided to a desired position by the guide portion 36, for example, by being lowered by a crane while contacting the tapered surface 37 and the upright surface 38. Therefore, the guide portion 36 can easily align the heavy battery pack 13.

[0067] When the bolts 16a, 16b, 16c, 16d are inserted into all the through - holes 25 of the brackets 14a, 14b, 14c, 14d, the brackets 14a, 14b, 14c, 14d are attached to the floor panel 17 by fastening with the bolts 16a, 16b, 16c, 16d and nuts. Thus, the fastening of the battery pack 13 and the brackets 14a, 14b, 14c, 14d to the floor panel 17 is completed.

[0068] When aligning the bracket 14b, the bracket 14b contacts the tapered surface 37 and the rising surface 38. However, the bracket 14b contacts the tapered surface 37 and the rising surface 38 of the guide portion 36 on the curved surface 23. Therefore, the bracket 14b can be prevented from getting caught on the guide portion 36 compared to the case where the bracket 14b contacts the guide portion 36 at an acute angle, and consequently, it can be prevented that the waterproof tray 15 is damaged and the rigidity of the waterproof tray 15 is reduced.

[0069] Also, since the bracket 14b is easily positioned, when the battery pack 13 is suspended by a crane, the manufacturing facilities such as the battery pack 13, brackets 14a, 14b, 14c, 14d, and the crane are less likely to contact the peripheral components such as the floor panel 17. Therefore, damage to the peripheral components such as the battery pack 13 and the floor panel 17 and the manufacturing facilities such as the crane is suppressed.

[0070] Furthermore, no additional equipment is required to realize the above-described mounting structure of the battery pack 13. Therefore, the above-described mounting structure of the battery pack 13 can improve productivity without increasing production costs.

[0071] In the above embodiment, the electric vehicle 1 includes a vehicle body 10, a battery pack 13, a bracket 14b, a waterproof tray 15, and a bolt 16b. The battery pack 13 is disposed above the floor panel 17. The bracket 14b protrudes forward (+X direction) from the battery pack 13 and is provided with a through hole 25. The waterproof tray 15 is provided with a through hole 41. The bolt 16b penetrates the through hole 41 and the through hole 25 from the floor panel 17 and protrudes upward (+Z direction) to fix the bracket 14b. The waterproof tray 15 has a guide portion 36 that can guide the bracket 14b from a position where the bolt 16b is disengaged from the through hole 25 to a position where the bolt 16b penetrates the through hole 25.

[0072] In the above configuration, when the bracket 14b is fixed to the bolt 16b, the bolt 16b is guided by the guide portion 36 of the waterproof tray 15 to the position where it penetrates the through hole 25. As a result, the attachment structure of the battery pack 13 can improve the workability of fixing the battery pack 13 to the bolt 16b via the bracket 14b.

[0073] Also, in the present embodiment, the waterproof tray 15 is provided with a through hole 41 and has a bottom surface 35 facing the bracket 14b. The guide portion 36 includes two tapered surfaces 37 located above the bottom surface 35 (+Z direction) and spaced apart from each other in the left-right direction (±Y direction), and an upright surface 38 extending between the two tapered surfaces 37 and both ends of the bottom surface 35 in the left-right direction (±Y direction). The two tapered surfaces 37 extend obliquely with respect to the vertical direction (±Z direction) so as to taper downward. The angle between the two tapered surfaces 37 and the vertical direction (±Z direction) is larger than the angle between the two upright surfaces 38 and the vertical direction (±Z direction). The upper (+Z direction) ends of the two upright surfaces 38 are located above the upper (+Z direction) ends of the bolts 16b.

[0074] In the above configuration, the two tapered surfaces 37 are formed in a tapered shape toward the space between the two upright surfaces 38. Therefore, when the bracket 14b is fixed to the bolt 16b, it first contacts one of the two tapered surfaces 37 and is guided along the tapered surface 37 toward the space between the two upright surfaces 38. Thereafter, the bracket 14b contacts at least one of the two upright surfaces 38 and is guided downward (-Z direction) along the upright surface 38. While the bracket 14b is being guided by the upright surface 38, the bolt 16b is inserted into the through hole 25. Then, with the bolt 16b penetrating the through hole 25, the bracket 14b contacts the bottom surface 35, and the arrangement of the bracket 14b is completed. That is, when the bracket 14b is fixed to the bolt 16b, it can be guided by the guide portion 36 to the position where the bolt 16b penetrates the through hole 25. For this reason, the attachment structure of the battery pack 13 can improve the workability of fixing the battery pack 13 to the bolt 16b via the bracket 14b.

[0075] Further, in the present embodiment, the bracket 14b has a first alignment surface 21 facing the bottom surface 35 and provided with a through hole 25, a second alignment surface 22 facing the upright surface 38, and a curved surface 23 extending in an arc shape between the first alignment surface 21 and the second alignment surface 22.

[0076] In the above configuration, when the bracket 14b is fixed to the bolt 16b, it contacts the tapered surface 37 and the upright surface 38 of the guide portion 36 at the curved surface 23. Therefore, the bracket 14b can be prevented from getting caught on the guide portion 36 compared to the case where it contacts the guide portion 36 at an acute angle, and thus it can be prevented that the waterproof tray 15 is damaged and the rigidity of the waterproof tray 15 is reduced.

[0077] As described above, the embodiments of the present invention have been described. However, the above-described embodiments are presented as examples and are not intended to limit the scope of the present invention. This novel embodiment can be implemented in various other forms. Also, various omissions, replacements, and changes can be made without departing from the gist of the invention. Further, this embodiment is included in the scope and gist of the invention and is included in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0078] 1 Electric vehicle 10 Vehicle body 13 Battery pack 14a, 14b, 14c, 14d Brackets 15 Waterproof tray 16a, 16b, 16c, 16d Bolts 17 Floor panel 21 First alignment surface 22 Second alignment surface 23 Curved surface 25 Through hole 35 Bottom surface 36 Guide portion 37 Tapered surface 38 Upright surface 39 Recess 41 Through-hole

Claims

1. A vehicle body, a battery pack disposed above the vehicle body, an intermediate member provided with a first opening, a bracket protruding from the battery pack in a first direction intersecting the vertical direction and provided with a second opening, a fixing member protruding upward through the first opening and the second opening from the vehicle body and to which the bracket is fixed, comprising: The intermediate member has a guide portion capable of guiding the bracket from a position where the fixing member is disengaged from the second opening to a position where the fixing member penetrates the second opening, and a first surface provided with the first opening and facing the bracket. The guide portion has two second surfaces spaced apart from each other in a second direction located above the first surface and along the first surface, and two third surfaces extending between the two second surfaces and both ends of the first surface in the second direction. The two second surfaces extend obliquely with respect to the vertical direction so as to taper downward. The angle between the two second surfaces and the vertical direction is larger than the angle between the two third surfaces and the vertical direction. The upper ends of the two third surfaces are located above the upper end of the fixing member. A battery pack mounting structure for an electric vehicle.

2. The bracket has a fourth surface facing the first surface and provided with the second opening, a fifth surface facing the third surface, and a curved surface extending in an arc shape between the fourth surface and the fifth surface. The battery pack mounting structure for an electric vehicle according to Claim 1.

Images