Battery-equipped vehicle structure

Abstract

To provide a vehicle structure with a battery that is able to prevent an impact load input due to side collision from being input to the battery and is able to prevent occurrence of abnormal noise caused by vibration.SOLUTION: A vehicle structure 10 with a battery includes a battery loading portion 31, a front cross member 14, a rear cross member 15, and right and left rear side frames 11, 12. The front cross member 14 is disposed on a vehicle front side of the battery loading portion 31, and the rear cross member 15 is disposed on a vehicle rear side of the battery loading portion 31. The left and right rear side frames 11, 12 are disposed on left and right outer sides, respectively, of the battery loading portion 31. The battery loading portion 31 includes a battery fixing portion 34 provided on an outer side in a vehicle width direction and configured to connect a battery unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle structure with a battery. [Background technology]

[0002] A known battery-equipped vehicle structure has a battery body and electrical components for an electric power supply unit (IPU) located below the rear seat. A known battery-equipped vehicle structure has a front cross member in front of the battery body and electrical components and a rear cross member in the rear of the vehicle. The battery body and electrical components are sometimes referred to as the "battery."

[0003] The front cross member and the rear cross member are highly rigid members that form part of the vehicle body frame. Therefore, by fastening the battery to the front cross member and the rear cross member, the battery can be protected by the front cross member and the rear cross member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6631472 Summary of the Invention [Problem to be solved by the invention]

[0005] In the battery-equipped vehicle structure of Patent Document 1, the battery is fastened to the front cross member and the rear cross member. Therefore, if an impact load is applied to the front cross member and the rear cross member due to a side collision, for example, the impact load may be applied to the battery from the front cross member or the rear cross member.

[0006] Furthermore, a bottom panel is provided below the battery to protect the battery, for example. The bottom panel is formed in a relatively large shape (specifically, a shape that is long in the vehicle width direction) because it is disposed below the battery. For this reason, for example, the bottom panel may vibrate while the vehicle is running, causing abnormal noise.

[0007] One possible solution to this problem is to increase the rigidity of the battery mounting part, such as the bottom panel. However, if the rigidity of the battery mounting part is increased, it is thought that the amount of impact load input to the battery mounting part in the event of a side collision will increase. In addition, increasing the rigidity of the battery mounting part may increase the weight.

[0008] Additionally, in the battery-equipped vehicle structure of Patent Document 1, the battery is fastened and fixed only to the front cross member and the rear cross member. With this configuration, it is conceivable that a relatively large load will be input to the battery due to twisting and road noise (for example, vibrations caused by friction between the tires and the road surface) that occurs in the vehicle body during a side collision or steering.

[0009] An object of the present invention is to provide a battery-equipped vehicle structure that can prevent impact loads input due to a side collision from being input to the battery and can also prevent abnormal noises from being generated due to vibrations. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention proposes the following means. (1) The battery-equipped vehicle structure of the present invention (for example, the battery-equipped vehicle structure 10 in the embodiments) comprises a battery loading section (for example, the battery loading section 31 in the embodiments) in which a battery (for example, the battery unit 20 in the embodiments) located below the seat is arranged, a front cross member (for example, the front cross member 14 in the embodiments) arranged in front of the battery loading section, a rear cross member (for example, the rear cross member 15 in the embodiments) arranged behind the battery loading section, and vehicle body side frames (for example, the left and right rear side frames 11, 12 in the embodiments) extending in the fore-and-aft direction of the vehicle on the vehicle width outer side of the battery loading section, and the battery loading section comprises a battery fixing section (for example, the battery fixing section 34 in the embodiments) provided on the vehicle width outer side to which the battery is connected.

[0011] This configuration allows the battery fixing portion to be located in an area surrounded by the front cross member, the rear cross member, and the vehicle side frame, thereby reducing the impact load that would be applied to the battery in a side collision. Furthermore, the battery is connected (fixed) to the battery fixing section (i.e., the battery loading section). Therefore, the battery can act as a mass for the battery loading section. This allows the battery to suppress vibrations of the battery loading section, thereby suppressing abnormal noise caused by vibrations.

[0012] In this way, the battery fixing part is located in the area surrounded by the front cross member, rear cross member, and vehicle side frame, and the battery is connected to the battery fixing part. This makes it possible to suppress the input of impact loads to the battery without increasing the weight of the vehicle, and also to suppress the generation of abnormal noise due to vibration.

[0013] (2) The battery loading section is surrounded by the front cross member, the rear cross member, and the vehicle side frame, and has a recess (e.g., recess 32 in the embodiment) that is recessed downward to accommodate the battery, and the battery fixing section may be arranged in the recess.

[0014] With this configuration, the battery can be housed in the recess via the battery fixing portion, thereby suppressing the impact load input to the battery due to a side collision. Furthermore, the battery is fixed to the recess via a battery fixing part, which allows the battery to act as a mass for the recess (i.e., the battery mounting part). This allows the battery to suppress vibrations in the battery mounting part, thereby preventing abnormal noise caused by vibrations.

[0015] (3) The battery loading portion may have a hollow cross section formed by the battery fixing portion and the recess, and may be provided with a reinforcing patch (e.g., reinforcing patch 35 in the embodiment) that is arranged on the outside of the vehicle compartment of the recess so as to overlap with the battery fixing portion when viewed from above the vehicle.

[0016] With this configuration, the battery fixing portion and the recess form a hollow cross section, thereby increasing the rigidity of the battery fixing portion. Furthermore, a reinforcing patch is placed on the passenger compartment outer side of the recess so as to overlap with the battery fixing portion. This further increases the rigidity of the battery fixing portion. This allows the battery to be firmly supported by the battery fixing portion. Furthermore, by increasing the rigidity of the battery fixing portion, vibration of the battery loading portion can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0017] (4) The recess may have a bottom portion (e.g., bottom portion 41 in the embodiment) positioned below the battery and an inclined portion (e.g., inclined portion 44 in the embodiment) that slopes upward as it extends from the bottom portion toward the outside in the vehicle width direction, and the battery fixing portion and the reinforcing patch may be connected to the recess so as to straddle the intersection portion between the bottom portion and the inclined portion (e.g., intersection portion 47 in the embodiment).

[0018] This configuration can increase the rigidity of the battery fixing portion, thereby enabling the battery to be firmly supported by the battery fixing portion. Furthermore, by increasing the rigidity of the battery fixing portion, vibration of the battery loading portion (recess) can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0019] (5) The inclined portion may include a protrusion (for example, protrusion 48 in the embodiment) that protrudes inward from the recess, and the battery fixing portion and the reinforcing patch may be joined to the protrusion.

[0020] By configuring it in this manner, the load of the battery input through the battery fixing portion can be smoothly transmitted to the inclined portion (i.e., the recess) via the convex portion, thereby increasing the rigidity of the battery fixing portion against the load input from the battery. Furthermore, by increasing the rigidity of the battery fixing portion, vibration of the battery loading portion can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0021] (6) The inclined portion may be disposed at a distance from the vehicle body side frame on the inner side in the vehicle width direction.

[0022] This configuration ensures clearance (space) for the vehicle side frame to deform due to the impact load input during a side collision, thereby preventing the deformed vehicle side frame from coming into contact with the battery fixing portion and the battery, and preventing the impact load from being input from the vehicle side frame to the battery.

[0023] (7) The vehicle side frame has an inner inclined portion (e.g., left and right inner inclined portions 25, 26 in the embodiment) that slopes inward in the vehicle width direction toward the rear of the vehicle and connects to the outer end portion of the rear cross member that is on the outer side in the vehicle width direction (e.g., left outer end portion 15b in the embodiment), and the battery fixing portion and reinforcing patch may be positioned on the front side of the vehicle relative to the inner inclined portion and positioned more inward in the vehicle width direction than the outer end portion of the rear cross member.

[0024] This configuration allows the impact load input during a side collision to be efficiently transmitted to the rear cross member via the inner inclined portion of the vehicle side frame, thereby reducing the impact load from being input to the battery and battery fixing portion.

[0025] (8) A battery tray (e.g., battery tray 18 in the embodiment) is provided between the battery and the bottom and connected to the battery fixing portion, and the battery includes a battery main body (e.g., battery main body 81 in the embodiment) composed of battery cells and electrical components (e.g., electrical components 82 in the embodiment) connected to the battery main body, and the battery tray may support the battery main body and the electrical components.

[0026] With this configuration, for example, it is possible to prevent an impact load input due to a side collision from being input to the battery body and electrical components via the vehicle body side frame, the front cross member, and the rear cross member. Furthermore, by supporting the battery body and electrical components with the battery tray, the load (weight) input to the battery fixing part can be increased, thereby suppressing vibration of the battery loading part and suppressing abnormal noise caused by vibration.

[0027] In addition, the battery tray is connected to a battery fixing section provided in the battery loading section. The battery fixing section is located in an area surrounded by the front cross member, rear cross member, and vehicle side frame. This makes it possible to suppress distortion of the battery tray due to twisting of the vehicle body during a side collision or steering, and road noise (e.g., vibrations caused by friction between the tire and the road surface). The battery main body and electrical components are supported on this battery tray. Hereinafter, vibrations caused by friction between the tire and the road surface may be simply referred to as "road noise." This reduces the load applied to the battery main body and electrical components (especially the battery main body) due to torsion and road noise generated in the vehicle body. Therefore, the load applied to the brackets connecting the battery tray and the battery main body can be reduced, and the connection rigidity between the battery tray and the battery main body can be increased.

[0028] (9) The battery main body may be arranged on one side of the recess in the vehicle width direction, the electrical components may be arranged on the other side of the recess in the vehicle width direction, and the battery fixing portion may be arranged at the end of the recess on one side in the vehicle width direction.

[0029] This configuration allows the battery body to be positioned close to the battery fixing part, which allows the battery body, which is heavier than the electrical components, to be efficiently supported by the battery fixing part, thereby increasing the support rigidity of the battery fixing part for the battery. Furthermore, by supporting the heavy battery body with the battery fixing part, the battery body can increase its role as a mass for the battery loading part, which allows the battery to suppress vibrations in the battery loading part and suppress abnormal noise caused by vibrations.

[0030] In addition, by placing the battery main body close to the battery fixing part, the load input to the battery main body due to torsion and road noise generated in the vehicle body can be further reduced, and the load input to the brackets connecting the battery tray and the battery main body can be further reduced. [Effects of the Invention]

[0031] According to the present invention, it is possible to prevent the impact load input due to a side collision from being input to the battery, and further to prevent abnormal noise caused by vibration. [Brief explanation of the drawings]

[0032] [Figure 1]1 is an exploded perspective view showing a battery-equipped vehicle structure according to an embodiment of the present invention; [Figure 2] 1 is a plan view showing a battery-equipped vehicle structure according to an embodiment of the present invention; [Figure 3] 1 is a bottom view showing the left side of a battery-equipped vehicle structure according to an embodiment of the present invention. FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 5] FIG. 2 is a perspective view showing a left side of a battery loading section according to the embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, a battery-equipped vehicle structure according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow LH indicates the left side of the vehicle.

[0034] <Vehicle structure with anchor unit> Fig. 1 is an exploded perspective view showing a battery-equipped vehicle structure 10 in an embodiment. Fig. 2 is a plan view showing the battery-equipped vehicle structure 10. Fig. 3 is a bottom view showing the left side of the battery-equipped vehicle structure 10.

[0035] 1 to 3, a vehicle Ve includes, for example, a battery-equipped vehicle structure 10 at the rear of the vehicle Ve. Hereinafter, the battery-equipped vehicle structure 10 may be abbreviated as "vehicle structure 10." The vehicle structure 10 includes left and right rear side frames (vehicle body side frames) 11, 12, a front cross member 14, a rear cross member 15, a floor panel 16, a battery tray 18, and a battery unit (battery) 20.

[0036] <Rear side frame> The left rear side frame 11 and the right rear side frame 12 are provided at the rear of the vehicle on the outer side in the vehicle width direction (i.e., on the left and right outer sides) of a battery loading section 31, which will be described later. The left rear side frame 11 and the right rear side frame 12 are, for example, highly rigid frame members that are formed with a hollow closed cross section and form part of the vehicle body frame.

[0037] The left rear side frame 11 is provided at the rear end 22a of the left side sill 22 and extends in the front-to-rear direction of the vehicle. The left rear side frame 11 has a left inner inclined portion (inner inclined portion) 25 on the outer left side in the vehicle width direction of the battery loading portion 31. The left inner inclined portion 25 is provided, for example, on the left rear side frame 11 between the front cross member 14 and the rear cross member 15. Specifically, the left inner inclined portion 25 is inclined inward in the vehicle width direction from, for example, a portion 11a of the left rear side frame 11 closer to the front cross member 14 toward the rear cross member 15 (i.e., toward the rear of the vehicle).

[0038] The right rear side frame 12 is provided at the rear end 23a of the right side sill 23 and extends in the front-to-rear direction of the vehicle. The right rear side frame 12 is formed generally symmetrically with respect to the left rear side frame 11. Therefore, the following description will focus on the left rear side frame 11, and a detailed description of the right rear side frame 12 will be omitted.

[0039] <Front cross member, rear cross member> A front cross member 14 is bridged between the front end portion 11b of the left rear side frame 11 and the front end portion 12a of the right rear side frame 12. The front cross member 14 is located in front of the battery loading section 31 (described later) in the vehicle. The front cross member 14 extends in the vehicle width direction and is a highly rigid frame member that forms part of the vehicle body frame. A rear cross member 15 is located at a distance behind the front cross member 14 in the vehicle. The rear cross member 15 is located behind the battery loading section 31 in the vehicle.

[0040] The rear cross member 15 spans between the left inner inclined portion 25 of the left rear side frame 11 and the right inner inclined portion (inner inclined portion) 26 of the right rear side frame 12. The left cross inclined end portion 15a of the rear cross member 15 extends obliquely outward to the left in the vehicle width direction as it extends toward the rear of the vehicle. The right cross inclined end portion (not shown) extends obliquely outward to the right in the vehicle width direction as it extends toward the rear of the vehicle.

[0041] The left cross oblique end 15a of the rear cross member 15 has a left outer end (outer end) 15b on the left outer side in the vehicle width direction connected to the rear end 25a of the left inner oblique portion 25. In other words, the left inner oblique portion 25 of the left rear side frame 11 is connected to the left outer end 15b of the rear cross member 15 on the outer side in the vehicle width direction. Similarly, the right inner oblique portion 26 of the right rear side frame 12 is connected to the right outer end (not shown) of the rear cross member 15 on the right outer side in the vehicle width direction. The rear cross member 15 is a highly rigid framework member that extends in the vehicle width direction and constitutes part of the vehicle body framework.

[0042] <Floor panel> FIG. 4 is a cross-sectional view taken along line II-II in FIG. As shown in Figures 1, 2, and 4, the floor panel 16 is disposed between the left rear side frame 11 and the right rear side frame 12, and extends from the front cross member 14 to the rear of the vehicle via the rear cross member 15. A battery loading section (battery housing section) 31 is provided in the front portion of the floor panel 16. The battery loading section 31 is disposed, for example, below a rear seat (seat) not shown. In the embodiment, a rear seat will be described as an example of the seat, but the seat is not limited to a rear seat.

[0043] The battery unit 20, which will be described later, is disposed above the battery loading section 31. The battery unit 20 is located below the rear seat. The battery loading section 31 includes a recess 32, a flange 33, a battery fixing section 34, and a reinforcing patch 35. The recess 32 is disposed in an area surrounded by the front cross member 14, the rear cross member 15, the left rear side frame 11, and the right rear side frame 12. The recess 32 is formed so as to be recessed downward in the vertical direction of the vehicle. The recess 32 is formed so as to be able to accommodate the battery unit 20, which will be described later.

[0044] A flange 33 is formed on the upper edge of the recess 32. The flange 33 protrudes outward from the recess 32 like a brim. The flange 33 is joined from above to the upper surfaces of the front cross member 14, the rear cross member 15, the left rear side frame 11, and the left rear side frame 11. As a result, the battery loading section 31 is supported by the front cross member 14, the rear cross member 15, the left rear side frame 11, and the left rear side frame 11.

[0045] The recess 32 includes a bottom 41, a front wall 42, a rear wall 43, a left side wall 44, and a right side wall 45. The bottom 41 is disposed, for example, horizontally below the battery unit 20. The front wall 42 rises upward from the front edge of the bottom 41 and is connected to the front part of the flange 33. The rear wall 43 rises upward from the rear edge of the bottom 41 and is connected to the rear part of the flange 33.

[0046] The left side wall 44 is raised so as to slope upward from the left edge of the bottom portion 41 toward the left outer side in the vehicle width direction, and is connected to the left side of the flange 33. Hereinafter, the left side wall 44 may be referred to as the "inclined portion 44." The inclined portion 44 will be described in detail later. The right side wall 45 is raised so as to slope upward from the right side of the bottom portion 41 toward the right outer side in the vehicle width direction, and is connected to the right side of the flange 33.

[0047] Fig. 5 is a perspective view showing the left side of the battery loading section 31 in the embodiment. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 5. As shown in Figures 5 and 6, the inclined portion 44 is disposed at a distance inward in the vehicle width direction from the left rear side frame 11. Specifically, the lower end portion 44a of the inclined portion 44 is disposed at a relatively large distance L1 inward in the vehicle width direction from the left rear side frame 11. The inclined portion 44 also includes a protruding portion 48. The protruding portion 48 protrudes, for example, from a lower half of the inclined portion 44 toward the recessed portion 32 (i.e., toward the passenger compartment 51). In other words, the protruding portion 48 is disposed on the left outer side in the vehicle width direction of the recessed portion 32 (i.e., on one side in the vehicle width direction).

[0048] The protrusion 48 has, for example, an upper protrusion 48a, a front protrusion 48b, and a rear protrusion 48c. The front protrusion 48b extends downward from the front end of the upper protrusion 48a, and the rear protrusion 48c extends downward from the rear end of the upper protrusion 48a. In other words, the upper protrusion 48a, the front protrusion 48b, and the rear protrusion 48c form an inverted U-shape.

[0049] The battery fixing portion 34 is joined to the protrusion 48 from the inside of the recess 32. The battery fixing portion 34 has a mounting portion 55 and a flange portion 56. The flange portion 56 has an outer half portion 56a that is raised in an inclined manner and joined to the protrusion 48. The outer periphery of the outer half portion 56a of the flange portion 56 is arranged along the upper protrusion 48a, front protrusion 48b, and rear protrusion 48c of the protrusion 48. The flange portion 56 has an inner half portion 56b that is formed horizontally and joined to the bottom 41.

[0050] That is, the battery fixing portion 34 is provided inside the recess 32 by joining the flange portion 56 to the protrusion 48 and the bottom portion 41. In other words, the battery fixing portion 34 is provided at the outer end portion of the recess 32 on the left outer side in the vehicle width direction (i.e., the outer end portion in the vehicle width direction, the end portion on one side in the vehicle width direction).

[0051] A mounting portion 55 is provided in the center of the flange portion 56. The mounting portion 55 is raised from the center of the flange portion 56 toward the inside of the recessed portion 32 and is disposed at a distance from the recessed portion 32 (specifically, the bottom portion 41 and the inclined portion 44). That is, the battery fixing portion 34 is connected to the recessed portion 32 from the inside so as to straddle the intersection 47 between the bottom portion 41 and the inclined portion 44.

[0052] The mounting portion 55 has legs 57 and a top 58. The legs 57 are raised upward from the inner half 56b of the flange portion 56. The legs 57 are U-shaped in plan view. A pair of outer ends 57a of the legs 57 (the outer ends 57a at the rear of the vehicle are shown in FIG. 2) are connected to the outer half 56a of the flange portion 56. The top 58 is connected to the upper end of the legs 57. The outer end 58a of the top 58 is connected to the outer half 56a of the flange portion 56. The top 58 is positioned horizontally so that a battery tray 18 (described later) can be placed thereon. In the battery fixing portion 34, the flange portion 56 is joined to the convex portion 48 and the bottom portion 41, so that the mounting portion 55 forms a hollow closed cross section (hollow cross section) together with the concave portion 32 (specifically, the bottom portion 41 and the inclined portion 44). Hereinafter, the hollow closed cross section may be referred to as a "first hollow closed cross section."

[0053] 3 and 6, the reinforcing patch 35 is joined to the protrusion 48 from the outside of the recess 32 (i.e., the outside of the passenger compartment 51). The reinforcing patch 35 is joined to the recess 32 from the outside of the passenger compartment 51 so as to overlap with the battery fixing portion 34 in a top view of the vehicle, and is thereby positioned on the outside of the passenger compartment 51 of the recess 32. The reinforcing patch 35 has a protrusion 62 and a patch flange portion 63.

[0054] The patch flange portion 63 is disposed such that the patch outer half portion 63a is raised at an angle and overlaps in the vertical direction with the inclined portion 44 and the outer half portion 56a of the flange portion 56. The patch outer half portion 63a is joined to the inclined portion 44 and the outer half portion 56a of the flange portion 56 from the outside of the recess 32. Furthermore, the patch flange portion 63 has a patch inner half 63b formed horizontally and is arranged in a state where it is overlapped in the up-down direction on the bottom portion 41 and the inner half 56b of the flange portion 56. The patch inner half 63b is joined to the bottom portion 41 and the inner half 56b of the flange portion 56 from the outside of the recessed portion 32. In other words, the reinforcing patch 35 is joined to the outside of the recessed portion 32 by joining the patch flange portion 63 to the protrusion 48 and the bottom portion 41 from the outside of the passenger compartment 51.

[0055] A protrusion 62 is provided at the center of the patch flange portion 63. The protrusion 62 protrudes downward from the center of the patch flange portion 63 and is disposed at a distance from the recess 32 (specifically, the bottom portion 41 and the inclined portion 44). In other words, the reinforcing patch 35 is connected to the recess 32 from the outside of the vehicle interior 51 so as to straddle the intersection 47 between the bottom portion 41 and the inclined portion 44. In the reinforcing patch 35, the patch flange portion 63 is joined to the convex portion 48 and the bottom portion 41 from outside the vehicle interior 51, so that the protruding portion 62 forms a hollow closed cross section (hollow cross section) together with the concave portion 32 (specifically, the bottom portion 41 and the inclined portion 44). Hereinafter, the hollow closed cross section may be referred to as a "second hollow closed cross section."

[0056] The battery fixing portion 34 and the reinforcing patch 35 are disposed on the vehicle front side relative to the left inner inclined portion 25 of the left rear side frame 11. Furthermore, the battery fixing portion 34 and the reinforcing patch 35 are disposed inward in the vehicle width direction relative to the left outer end portion 15b of the rear cross member 15.

[0057] <Battery tray, battery unit> 1, 4, and 6, a battery tray 18 is disposed above the bottom 41 of the recess 32. The battery tray 18 has a plurality of (two in this embodiment) front mounting portions 71 attached to the front cross member 14 from above. The battery tray 18 also has a plurality of (three in this embodiment) rear mounting portions 72 attached to the rear cross member 15 from above.

[0058] In this state, the battery tray 18 has a tray bottom 73 disposed between the battery unit 20 (described later) and the bottom 41 of the recess 32. The left end 73a of the tray bottom 73 is placed from above on the top 58 of the battery fixing portion 34. The left end 73a of the tray bottom 73 is attached to the top 58 with fastening members (in this embodiment, a bolt 75 and a nut 76).

[0059] The battery unit 20 is supported (loaded) on the tray bottom 73 in a state in which it is placed from above. The battery unit 20 includes a battery main body 81 constituted by battery cells (not shown), and electrical components 82 connected to the battery main body 81. That is, the battery main body 81 and the electrical components 82 are supported on the tray bottom 73. The tray bottom 73, together with the battery main body 81 and the electrical components 82 (battery unit 20), is connected (fixed) to the battery fixing portion 34 by bolts 75 and nuts 76. In other words, the battery unit 20 is connected to the battery fixing portion 34 via the tray bottom 73.

[0060] Here, the battery main body 81 is fixed in a state in which it is disposed on the left side in the vehicle width direction (one side in the vehicle width direction) of the tray bottom 73. That is, the battery main body 81 is disposed on the left side in the vehicle width direction of the recess 32. Also, the battery fixing portion 34 is disposed on the outer left side in the vehicle width direction of the recess 32. Therefore, the battery main body 81 is disposed close to the battery fixing portion 34 side.

[0061] Furthermore, the electrical component 82 is fixed in a state in which it is disposed on the right side in the vehicle width direction (the other side in the vehicle width direction) of the tray bottom 73. That is, the electrical component 82 is disposed on the right side in the vehicle width direction of the recess 32. The battery body 81 and the electrical components 82 are positioned below the rear seat while being supported by the tray bottom 73.

[0062] As described above, the battery-equipped vehicle structure 10 of the embodiment can provide the following actions and effects. 2 and 6, the recess 32 is disposed in an area surrounded by the front cross member 14, the rear cross member 15, the left rear side frame 11, and the left rear side frame 11. The battery unit 20 is also disposed in the recess 32. This makes it possible to prevent the input of the impact load F1 to the battery unit 20 (particularly the battery main body 81) when an impact load F1 is input to the left rear side frame 11 due to a side collision, for example.

[0063] Furthermore, the battery unit 20 is placed on the battery tray 18, and the left end 73a of the battery tray 18 is attached to the top 58 of the battery fixing portion 34 with a bolt 75 and a nut 76. Therefore, the battery unit 20 is connected (fixed) to the recess 32 via the battery tray 18 and the battery fixing portion 34. This allows the battery unit 20 to act as a mass for the recess 32. Therefore, the battery unit 20 can suppress vibrations of the recess 32 (i.e., the battery loading portion 31), thereby suppressing the generation of abnormal noise due to the vibrations.

[0064] In this way, the recess 32 is disposed in the area surrounded by the front cross member 14, the rear cross member 15, the left rear side frame 11, and the left rear side frame 11, and the battery unit 20 is connected (fixed) to the recess 32 via the battery tray 18. This makes it possible to prevent the impact load F1 from being input to the battery unit 20 without increasing the weight of the vehicle Ve (see FIG. 1), and also makes it possible to prevent abnormal noise caused by vibration.

[0065] By joining the flange portion 56 of the battery fixing portion 34 to the convex portion 48 and the bottom portion 41, a first hollow closed cross section is formed by the mounting portion 55 of the battery fixing portion 34 and the recessed portion 32 (specifically, the bottom portion 41 and the inclined portion 44). This increases the rigidity of the battery fixing portion 34. Furthermore, the reinforcing patch 35 is joined to the recessed portion 32 from the outside of the vehicle interior 51 so as to overlap with the battery fixing portion 34. This further increases the rigidity of the battery fixing portion 34. This allows the battery unit 20 to be firmly supported by the battery fixing portion 34. Furthermore, by increasing the rigidity of the battery fixing portion 34, vibration of the recess 32 can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0066] Furthermore, the protrusion 62 and the recess 32 (specifically, the bottom 41 and the inclined portion 44) of the reinforcing patch 35 form a second hollow closed cross section. This increases the rigidity of the reinforcing patch 35, thereby further increasing the rigidity of the battery fixing portion 34. This allows the battery unit 20 to be firmly supported by the battery fixing portion 34, and further reduces the generation of abnormal noise due to vibration.

[0067] The battery fixing portion 34 is connected to the recess 32 from the inside so as to straddle the intersection 47 between the bottom 41 of the recess 32 and the inclined portion 44. Furthermore, the reinforcing patch 35 is connected to the recess 32 from the outside of the vehicle interior 51 so as to straddle the intersection 47. This increases the rigidity of the battery fixing portion 34. This allows the battery unit (particularly the battery main body 81) to be firmly supported by the battery fixing portion 34. Furthermore, by increasing the rigidity of the battery fixing portion 34, vibration of the recess 32 can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0068] 5 and 6, the inclined portion 44 is provided with a convex portion 48, and the battery fixing portion 34 and the reinforcing patch 35 are joined to the convex portion 48. Therefore, the load F2 of the battery unit (particularly the battery main body 81) input via the battery fixing portion 34 can be smoothly transmitted to the inclined portion 44 (i.e., the recess 32) via the convex portion 48. This increases the rigidity of the battery fixing portion 34 against the load F2 input from the battery unit 20. Furthermore, by increasing the rigidity of the battery fixing portion 34, vibration of the recess 32 can be suppressed, and abnormal noise caused by vibration can be suppressed.

[0069] Furthermore, the lower end 44a of the inclined portion 44 is disposed at a relatively large distance L1 inward in the vehicle width direction relative to the left rear side frame 11. A convex portion 48 is formed in the lower half of the inclined portion 44, and the battery fixing portion 34 is joined to the convex portion 48. Therefore, the battery fixing portion 34 can be disposed at a relatively large distance L2 inward in the vehicle width direction relative to the left rear side frame 11. Therefore, a clearance (space) can be secured for the left rear side frame 11 to be deformed by the impact load F1 input due to a side collision. This prevents the deformed left rear side frame 11 from coming into contact with the battery fixing portion 34 and the battery unit 20, and prevents the impact load F1 from being input from the left rear side frame 11 to the battery unit 20.

[0070] As shown in Figures 2 and 3, the left inner inclined portion 25 of the left rear side frame 11 is connected to the left outer end 15b of the rear cross member 15. Furthermore, the battery fixing portion 34 and the reinforcing patch 35 are disposed on the vehicle front side of the left inner inclined portion 25 of the left rear side frame 11, and are disposed inward in the vehicle width direction from the left outer end 15b of the rear cross member 15. Therefore, a portion of the impact load F1 input due to a side collision can be efficiently transmitted as load F3 to the rear cross member 15 via the left inner inclined portion 25 of the left rear side frame 11. This makes it possible to prevent the impact load F1 from being input to the battery unit 20 (particularly the battery main body 81) and the battery fixing portion 34.

[0071] 2, 4, and 6, the battery tray 18 is connected (fixed) to the battery fixing portion 34 with bolts 75 and nuts 76, and the battery tray 18 supports the battery main body 81 and the electrical components 82. Therefore, for example, it is possible to prevent an impact load F1 input due to a side collision from being input to the battery main body 81 and the electrical components 82 via the left rear side frame 11, the front cross member 14, and the rear cross member 15. Furthermore, by supporting the battery main body 81 and the electrical components 82 by the battery tray 18, it is possible to increase the load (weight) F2 input to the battery fixing portion 34. This makes it possible to suppress vibration of the recess 32 and to suppress the generation of abnormal noise due to vibration.

[0072] Here, for example, if the battery main body 81 and the electrical components 82 are fastened and fixed only to the front cross member 14 and the rear cross member 15, it is possible that a relatively large load will be input to the battery main body 81 and the electrical components 82 due to twisting or road noise (i.e., vibrations caused by friction between the tires and the road surface) that occurs in the vehicle body during a side collision or steering.

[0073] Therefore, the battery tray 18 is connected to the battery fixing portion 34 provided on the battery loading portion 31. The battery fixing portion 34 is located in an area surrounded by the front cross member 14, the rear cross member 15, and the left rear side frame 11. This makes it possible to suppress distortion of the battery tray 18 due to twisting or road noise that occurs in the vehicle body during a side collision or steering, for example. A battery main body 81 and electrical components 82 are supported on this battery tray 18. This makes it possible to suppress the load applied to the battery main body 81 and the electrical components 82 (especially the battery main body 81) due to torsion and road noise generated in the vehicle body. Therefore, it is possible to suppress the load applied to a bracket (not shown) that connects the battery tray 18 and the battery main body 81, and to increase the connection rigidity between the battery tray 18 and the battery main body 81.

[0074] Furthermore, the battery main body 81 is disposed close to the battery fixing portion 34. Therefore, the battery main body 81, which is heavier than the electrical components 82, can be more efficiently supported by the battery fixing portion 34. This increases the support rigidity of the battery fixing portion 34 with respect to the battery unit 20. Furthermore, by supporting the heavy battery main body 81 on the battery fixing portion 34, the battery main body 81 can increase its role as a mass for the recessed portion 32. This allows the battery unit 20 to suppress vibrations of the recessed portion 32, thereby suppressing the generation of abnormal noise due to vibrations.

[0075] In addition, by arranging the battery main body 81 close to the battery fixing portion 34, it is possible to further effectively suppress the load input to the battery main body 81 due to torsion and road noise generated in the vehicle body. This makes it possible to further reduce the load input to the bracket (not shown) connecting the battery tray 18 and the battery main body 81.

[0076] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the battery main body 81 is disposed on the outer left side in the vehicle width direction, but the battery main body 81 may be disposed on the outer right side in the vehicle width direction.

[0077] In addition, within the scope of the spirit of the present invention, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0078] 10...Battery-equipped vehicle structure 11, 12...Left and right rear side frames (vehicle side frames) 14...Front cross member 15...Rear cross member 15b...Left outer end (outer end) of rear cross member 18...Battery tray 20...Battery unit (battery) 25, 26...Left and right inner inclined portions (inner inclined portions) 31...Battery loading section 32...recess 34...Battery fixing part 35...Reinforcement patch 41...bottom 44…Slope part 47...Intersection 48...Convex part 81...Battery body 82...Electrical parts

Claims

1. a battery loading section located below the seat and in which a battery is placed; a front cross member disposed in front of the battery loading section; a rear cross member disposed behind the battery loading section; a vehicle body side frame extending in a front-rear direction of the vehicle on an outer side of the battery loading portion in a vehicle width direction; Equipped with the battery loading section includes a battery fixing section provided on an outer side in the vehicle width direction to which the battery is connected, and a recessed section recessed downward to accommodate the battery, The battery mounting portion includes a reinforcing patch that is disposed on the outer side of the recess so as to overlap with the battery fixing portion in a top view of the vehicle. A vehicle structure with a battery.

2. the battery loading portion is surrounded by the front cross member, the rear cross member, and the vehicle body side frame, The battery fixing portion is disposed in the recess.

2. The battery-equipped vehicle structure according to claim 1.

3. The recessed portion is a bottom portion disposed below the battery; an inclined portion inclined upward from the bottom portion toward the outer side in the vehicle width direction; Equipped with The battery fixing portion and the reinforcing patch are connected to the recess so as to straddle the intersection between the bottom portion and the inclined portion.

2. The battery-equipped vehicle structure according to claim 1.

4. the inclined portion includes a protrusion protruding inward of the recess, 4. The battery-equipped vehicle structure according to claim 3, wherein the battery fixing portion and the reinforcing patch are joined to the protrusion.

5. 4. The battery-equipped vehicle structure according to claim 3, wherein the inclined portion is disposed at a distance from the vehicle body side frame on the inner side in the vehicle width direction.

6. the vehicle body side frame includes an inner inclined portion that is inclined inward in the vehicle width direction toward the rear of the vehicle and is connected to an outer end portion of the rear cross member that is on the outer side in the vehicle width direction, The battery-equipped vehicle structure described in claim 1, characterized in that the battery fixing portion and the reinforcement patch are positioned on the front side of the vehicle relative to the inner inclined portion and are positioned more inward in the vehicle width direction than the outer end portion of the rear cross member.

7. a battery tray disposed between the battery and the bottom and connected to the battery fixing portion; The battery a battery body composed of battery cells; an electrical component connected to the battery body; Equipped with The battery tray supports the battery body and the electrical components.

4. The battery-equipped vehicle structure according to claim 3.

8. The battery main body is disposed on one side of the recess in the vehicle width direction, the electrical component is disposed on the other side of the recess in the vehicle width direction, 8. The battery-equipped vehicle structure according to claim 7, wherein the battery fixing portion is disposed at one end of the recess in the vehicle width direction.

Images