Vehicle structure with battery

Abstract

This invention provides a vehicle structure with a battery that can suppress the input of impact loads from side collisions to the battery and suppress abnormal noise caused by vibration. The vehicle structure (10) with a battery includes a battery mounting section (31), a front crossbeam (14), a rear crossbeam (15), and left and right rear side frames (11, 12). The front crossbeam (14) is located at the front of the battery mounting section (31). The rear crossbeam (15) is located at the rear of the battery mounting section (31). The left and right rear side frames (11, 12) are located on the left and right outer sides of the battery mounting section (31). The battery mounting section (31) includes a battery fixing section (34) located on the outer side in the vehicle width direction for connecting the battery.

Description

Technical Field

[0001] This invention relates to vehicle structures with storage batteries. Background Technology

[0002] As a vehicle structure with a battery, a known structure has a battery body and electrical mounting components for a power circuit control unit (IPU) located under the rear seats. As a vehicle structure with a battery, a known structure has a front crossbeam at the front of the vehicle and a rear crossbeam at the rear of the vehicle, including the battery body and electrical mounting components. Sometimes, the battery body and electrical mounting components are referred to as a "battery".

[0003] Here, the front and rear crossbeams are highly rigid components that form part of the vehicle body frame. Thus, by fastening the battery to the front and rear crossbeams, the battery can be protected by the front and rear crossbeams (for example, see Japanese Patent No. 6631472). Summary of the Invention

[0004] In the vehicle structure with a battery disclosed in Japanese Patent No. 6631472, the battery is fastened to the front crossbeam and the rear crossbeam. Thus, for example, in the case where an impact load is input to the front crossbeam and the rear crossbeam due to a side collision, the case where the input impact load is input to the battery from the front crossbeam and the rear crossbeam is considered.

[0005] Furthermore, a bottom plate is provided below the battery, for example, to protect the battery. The bottom plate is formed into a relatively large shape (specifically, a long shape in the vehicle width direction) for its placement below the battery. Therefore, it is possible that the bottom plate may vibrate during vehicle operation, resulting in abnormal noise.

[0006] As a countermeasure, it is considered to improve the rigidity of battery mounting parts such as the bottom plate.

[0007] However, increasing the rigidity of the battery mount increases the potential for increased impact load input to the battery mount during a side collision. Furthermore, the increased rigidity may also lead to an increase in weight.

[0008] Furthermore, in the vehicle structure with a battery disclosed in Japanese Patent No. 6631472, the battery is only fastened to the front and rear crossbeams. According to this structure, it is considered that a relatively large load may be input to the battery due to side collisions, torsion of the vehicle body during cornering, and road noise (e.g., vibration caused by friction between the tires and the road surface).

[0009] The purpose of this invention is to provide a vehicle structure with a battery that can suppress the input of impact loads from side collisions to the battery and suppress abnormal noise caused by vibration.

[0010] The first embodiment of the present invention provides a vehicle structure with a battery, comprising: a battery loading section having a battery disposed below a seat; a front crossbeam disposed in front of the battery loading section; a rear crossbeam disposed behind the battery loading section; and a vehicle body side frame extending along the vehicle front-rear direction outside the battery loading section in the vehicle width direction, wherein the battery loading section includes a battery fixing section disposed outside the vehicle width direction for connecting the battery.

[0011] This configuration allows the battery mounting area to be positioned within the region surrounded by the front crossbeam, rear crossbeam, and side frame of the vehicle body. This, in turn, helps to suppress the input of impact loads from side collisions to the battery.

[0012] Furthermore, the battery is connected (fixed) to the battery mounting section (i.e., the battery mounting section). Thus, the battery acts as a mass relative to the battery mounting section. Therefore, by using the battery to suppress vibration of the battery mounting section, abnormal noise caused by vibration can be suppressed.

[0013] In this way, the battery mounting section is positioned in the area surrounded by the front crossbeam, rear crossbeam, and side frame of the vehicle body, and the battery is connected to the battery mounting section. As a result, it is possible to suppress the input of impact loads to the battery without increasing the weight of the vehicle, and it is also possible to suppress abnormal noise caused by vibration.

[0014] In the second embodiment, the battery loading section may have a recessed portion surrounded by the front crossbeam, the rear crossbeam, and the vehicle side frame, which is recessed downward to accommodate the battery, and the battery fixing portion is disposed in the recessed portion.

[0015] With this configuration, the battery can be housed in the recess via the battery fixing part. This helps to suppress the input of impact loads from side collisions to the battery.

[0016] Furthermore, the battery is fixed to the recess via the battery mounting part. Thus, the battery acts as a mass relative to the recess (i.e., the battery mounting part). This suppresses vibration of the battery mounting part, thereby preventing abnormal noise caused by vibration.

[0017] In the third embodiment, the battery loading section may form a hollow cross section through the battery fixing section and the recess, and the vehicle structure with the battery may have a reinforcing liner disposed on the exterior side of the recess in a manner that overlaps with the battery fixing section when viewed from above.

[0018] This configuration, with the battery mounting portion and the recess forming a hollow cross-section, improves the rigidity of the battery mounting portion. Furthermore, a reinforcing liner is positioned on the exterior side of the recess, overlapping with the battery mounting portion. This further enhances the rigidity of the battery mounting portion. Consequently, the battery can be securely supported by the battery mounting portion.

[0019] Furthermore, by increasing the rigidity of the battery mounting part, the vibration of the battery loading part can be suppressed, thereby suppressing abnormal noise caused by vibration.

[0020] In the fourth embodiment, the recess may include: a bottom disposed below the battery; and an inclined portion that slopes upward from the bottom toward the outside in the vehicle width direction, wherein the battery fixing portion and the reinforcing liner are connected to the recess across the intersection of the bottom and the inclined portion.

[0021] This configuration increases the rigidity of the battery mounting section. Consequently, the battery can be securely supported by the battery mounting section.

[0022] Furthermore, by increasing the rigidity of the battery mounting portion, vibration of the battery mounting portion (recess) can be suppressed, thereby suppressing abnormal noise caused by vibration.

[0023] In the fifth embodiment, the inclined portion may have a protrusion that protrudes into the inner side of the recess, and the battery fixing portion and the reinforcing liner are engaged with the protrusion.

[0024] With this configuration, the load of the battery input via the battery mounting part can be smoothly transferred from the protrusion to the inclined part (i.e., the concave part), thereby improving the rigidity of the battery mounting part relative to the load input from the battery.

[0025] Furthermore, by increasing the rigidity of the battery mounting part, the vibration of the battery loading part can be suppressed, thereby suppressing abnormal noise caused by vibration.

[0026] In the sixth embodiment, the inclined portion may be configured separately from the side frame of the vehicle body in the vehicle width direction.

[0027] This configuration ensures sufficient clearance (space) for the side frame of the vehicle body to deform under impact loads from side collisions. This prevents the deformed side frame from contacting the battery mount and the battery, and also suppresses the input of impact loads from the side frame to the battery.

[0028] In the seventh embodiment, the vehicle side frame may have an inner inclined portion that tilts inward toward the rear of the vehicle in the vehicle width direction and is connected to the outer end of the rear crossbeam in the vehicle width direction. The battery fixing portion and the reinforcing liner are disposed on the front side of the vehicle relative to the inner inclined portion and are disposed at a position closer to the vehicle width direction than the outer end of the rear crossbeam.

[0029] This configuration allows for efficient transfer of impact loads from side collisions to the rear crossbeam via the inner inclined portion of the side frame. This, in turn, suppresses the input of impact loads to the battery and its mounting components.

[0030] In the eighth embodiment, the vehicle structure with the battery may also include a battery tray disposed between the battery and the bottom and connected to the battery fixing part. The battery includes: a battery body composed of battery cells; and an electrical mounting component connected to the battery body, wherein the battery tray supports the battery body and the electrical mounting component.

[0031] This configuration can suppress the input of impact loads, such as those from side collisions, to the battery body and electrical installation components via the vehicle side frame, front crossbeam, and rear crossbeam.

[0032] Furthermore, by supporting the battery body and electrical mounting components with a battery tray, the load (weight) input to the battery mounting section can be increased. This helps to suppress vibration of the battery mounting section, thereby suppressing abnormal noise caused by vibration.

[0033] Furthermore, a battery tray is connected to the battery mounting section within the battery loading unit. The battery mounting section is located in an area surrounded by the front crossbeam, rear crossbeam, and side frame of the vehicle body. This helps to suppress deformation of the battery tray caused by factors such as side collisions, torsion of the vehicle body during cornering, and road noise (e.g., vibrations caused by tire-road friction). The battery tray supports the battery body and electrical mounting components. Hereinafter, vibrations caused by tire-road friction will sometimes be referred to simply as "road noise."

[0034] This allows for the suppression of loads input to the battery pack and electrical mounting components (especially the battery pack) caused by torsion generated in the vehicle body and road noise. Consequently, loads input to the brackets connecting the battery tray and the battery pack can be minimized, thereby improving the connection rigidity between the battery tray and the battery pack.

[0035] In the ninth embodiment, the battery body may be disposed on one side of the recess in the vehicle width direction, the electrical mounting component may be disposed on the other side of the recess in the vehicle width direction, and the battery fixing part may be disposed at the end of one side of the recess in the vehicle width direction.

[0036] This configuration allows the battery body to be positioned close to the battery mounting section. Consequently, the battery mounting section can efficiently support the battery body, which is heavier than the electrical mounting components. This improves the support rigidity of the battery mounting section relative to the battery.

[0037] Furthermore, by supporting the heavy battery body with the battery mounting section, the mass of the battery body relative to the battery mounting section is increased. This, in turn, suppresses vibration of the battery mounting section, thereby reducing abnormal noise caused by vibration.

[0038] Furthermore, by positioning the battery body close to the battery mounting point, the load input to the battery body due to torsion generated in the vehicle body and road noise can be better suppressed. As a result, the load input to the brackets connecting the battery tray and the battery body can be reduced even further.

[0039] According to the solution of the present invention, it is possible to suppress the input of impact loads from side collisions to the battery, and it is also possible to suppress abnormal noise caused by vibration. Attached Figure Description

[0040] Figure 1 This is an exploded perspective view showing the vehicle structure with a storage battery according to an embodiment of the present invention.

[0041] Figure 2 This is a top view showing the vehicle structure with a storage battery according to an embodiment of the present invention.

[0042] Figure 3 This is a bottom view showing the left side of the vehicle structure with a storage battery according to an embodiment of the present invention.

[0043] Figure 4 It is along Figure 1 A sectional view taken along line II-II.

[0044] Figure 5This is a perspective view showing the left side of the battery loading section in an embodiment of the present invention.

[0045] Figure 6 It is along Figure 5 A sectional view taken along line VI-VI. Detailed Implementation

[0046] The following description, based on the accompanying drawings, illustrates a vehicle structure with a storage battery according to an embodiment of the present invention. It should be noted that in the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the top of the vehicle, and arrow LH indicates the left side of the vehicle.

[0047] <Vehicle structure with battery>

[0048] Figure 1 This is an exploded perspective view showing the vehicle structure 10 with a storage battery in the embodiment. Figure 2 This is a top view showing the vehicle structure 10 with a battery. Figure 3 This is a bottom view showing the left side of the vehicle structure 10 with a battery.

[0049] like Figures 1 to 3 As shown, vehicle Ve has, for example, a vehicle structure 10 with a battery at the rear of vehicle Ve. Hereinafter, the vehicle structure 10 with a battery will sometimes be referred to as "vehicle structure 10".

[0050] The vehicle structure 10 includes left and right rear side frames (body side frames) 11 and 12, front crossbeam 14, rear crossbeam 15, floor 16, battery tray 18, and battery unit (battery) 20.

[0051] <Rear Frame>

[0052] The left rear side frame 11 and the right rear side frame 12 are located at the rear of the vehicle on the outer side (i.e., the left and right outer sides) of the battery loading section 31 described later. The left rear side frame 11 and the right rear side frame 12 are, for example, high-rigidity frame members that are formed as part of the vehicle body frame by means of hollow closed sections.

[0053] The left rear side frame 11 is located at the rear end 22a of the lower left side beam 22 and extends along the vehicle's longitudinal direction. The left rear side frame 11 has a left inner inclined portion (inner inclined portion) 25 on the left outer side of the battery loading section 31 in the vehicle width direction. The left inner inclined portion 25 is, for example, located between the front crossbeam 14 and the rear crossbeam 15 in the left rear side frame 11. Specifically, the left inner inclined portion 25, for example, tilts inward in the vehicle width direction from the portion 11a of the left rear side frame 11 near the front crossbeam 14 toward the rear crossbeam 15 (i.e., the rear of the vehicle).

[0054] The right rear side frame 12 is located at the rear end 23a of the lower right side beam 23 and extends along the longitudinal direction of the vehicle. The right rear side frame 12 is formed approximately symmetrically with respect to the left rear side frame 11. Therefore, the detailed description of the right rear side frame 12 will be omitted below, focusing on the left rear side frame 11.

[0055] Front crossbeam, rear crossbeam

[0056] A front crossbeam 14 is mounted on the front end 11b of the left rear side frame 11 and the front end 12a of the right rear side frame 12. The front crossbeam 14 is located at the front of the battery loading section 31, which will be described later. The front crossbeam 14 is a highly rigid skeletal member that extends along the vehicle width direction and forms part of the vehicle body frame. A rear crossbeam 15 is arranged at intervals behind the front crossbeam 14. The rear crossbeam 15 is located at the rear of the battery loading section 31.

[0057] The rear crossbeam 15 is mounted on the left inner inclined portion 25 of the left rear frame 11 and the right inner inclined portion (inner inclined portion) 26 of the right rear frame 12. The rear crossbeam 15 extends obliquely to the left and outward in the vehicle width direction as the left oblique end 15a faces the rear of the vehicle. The right oblique end (not shown) extends obliquely to the right and outward in the vehicle width direction as it faces the rear of the vehicle.

[0058] In the left transverse inclined end 15a of the rear crossbeam 15, the left outer end (outer end) 15b on the left outer side in the vehicle width direction is connected to the rear end 25a of the left inner inclined portion 25. In other words, the left inner inclined portion 25 of the left rear side frame 11 is connected to the left outer end 15b on the outer side in the vehicle width direction of the rear crossbeam 15. Similarly, the right inner inclined portion 26 of the right rear side frame 12 is connected to the right outer end (not shown) on the right outer side in the vehicle width direction of the rear crossbeam 15. The rear crossbeam 15 is a highly rigid skeletal member that extends along the vehicle width direction and forms part of the vehicle body frame.

[0059] <Base Plate>

[0060] Figure 4 It is along Figure 1 A sectional view taken along line II-II.

[0061] like Figure 1 , Figure 2 , Figure 4 As shown, the floor plate 16 is disposed between the left rear side frame 11 and the right rear side frame 12, extending from the front crossbeam 14 and through the rear crossbeam 15 toward the rear of the vehicle. A battery mounting section (battery storage section) 31 is provided at the front of the floor plate 16. The battery mounting section 31 is disposed, for example, under a rear seat (not shown). In this embodiment, a rear seat is used as an example for explanation, but the seat is not limited to a rear seat.

[0062] In the battery mounting section 31, the battery unit 20, described later, is positioned above. The battery unit 20 is located below the rear seat. The battery mounting section 31 includes a recess 32, a flange 33, a battery mounting section 34, and a reinforcing liner 35. The recess 32 is located in the area surrounded by the front crossbeam 14, the rear crossbeam 15, the left rear side frame 11, and the right rear side frame 12. The recess 32 is formed in a downward recessed manner in the vertical direction of the vehicle. The recess 32 is configured to accommodate the battery unit 20, described later.

[0063] A flange 33 is formed on the upper edge of the recess 32. The flange 33 extends outward in a convex shape toward the outside of the recess 32. The flange 33 engages with the upper surface of the front crossbeam 14, the rear crossbeam 15, the left rear side frame 11, and the right rear side frame 12 from above. Thus, the battery mounting section 31 is supported by the front crossbeam 14, the rear crossbeam 15, the left rear side frame 11, and the right rear side frame 12.

[0064] 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 positioned horizontally below the battery unit 20, for example. The front wall 42 rises upward from the front of the bottom 41 and connects to the front of the flange 33. The rear wall 43 rises upward from the rear of the bottom 41 and connects to the rear of the flange 33.

[0065] The left side wall 44 rises upwards from the left side of the bottom 41 toward the left outer side in the vehicle width direction and connects to the left side of the flange 33. Hereinafter, the left side wall 44 will sometimes be referred to as the "inclined portion 44". The inclined portion 44 will be described in detail later.

[0066] The right side wall 45 rises upwards from the right side of the bottom 41 toward the right outer side in the vehicle width direction and is connected to the right side of the flange 33.

[0067] Figure 5 This is a perspective view showing the left side of the battery loading section 31 in the embodiment. Figure 6 It is along Figure 5 A sectional view taken along line VI-VI.

[0068] like Figure 5 , Figure 6 As shown, the inclined portion 44 is disposed separately from the left rear side frame 11 in the vehicle width direction. Specifically, the lower end portion 44a of the inclined portion 44 is disposed at a relatively large distance L1 away from the left rear side frame 11 in the vehicle width direction.

[0069] Additionally, the inclined portion 44 includes a protrusion 48. The protrusion 48 protrudes, for example, from the lower half of the inclined portion 44 toward the recess 32 side (i.e., the vehicle compartment 51 side). In other words, the protrusion 48 is located on the left outer side (i.e., one side in the vehicle width direction) of the recess 32.

[0070] The protrusion 48 may have, for example, an upper protrusion 48a, a front protrusion 48b, and a rear protrusion 48c.

[0071] In the protrusion 48, 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. That is, the protrusion 48 is formed into an inverted U-shape by the upper protrusion 48a, the front protrusion 48b, and the rear protrusion 48c.

[0072] The battery mounting portion 34 engages with the protrusion 48 from the inside of the recess 32. The battery mounting portion 34 has a mounting portion 55 and a flange portion 56. The outer half 56a of the flange portion 56 is inclined and engages with the protrusion 48. The outer periphery of the outer half 56a of the flange portion 56 is arranged along the upper protrusion 48a, the front protrusion 48b, and the rear protrusion 48c of the protrusion 48. In addition, the inner half 56b of the flange portion 56 is formed horizontally and engages with the bottom 41.

[0073] That is, the battery fixing part 34 is provided inside the recess 32 by engaging with the protrusion 48 and the bottom 41 through the flange part 56. In other words, the battery fixing part 34 is provided at the outer end of the left outer side in the vehicle width direction of the recess 32 (that is, the outer side in the vehicle width direction, the end on one side in the vehicle width direction).

[0074] A mounting portion 55 is provided at the center of the flange portion 56. The mounting portion 55 protrudes from the center of the flange portion 56 toward the inside of the recess 32 and is arranged at intervals relative to the recess 32 (specifically, the bottom 41 and the inclined portion 44). That is, the battery fixing portion 34 is connected to the recess 32 from the inside by crossing the intersection 47 of the bottom 41 and the inclined portion 44.

[0075] The mounting portion 55 has legs 57 and a top 58. The legs 57 rise upwards from the inner half 56b of the flange portion 56. The legs 57 are U-shaped when viewed from above. One pair of the outer ends 57a of the legs 57 (… Figure 2 The outer end 57a at the rear of the vehicle is shown connected to the outer half 56a of the flange portion 56. A top 58 is connected to the upper end of the leg portion 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 horizontally configured to accommodate the battery tray 18, which will be described later.

[0076] The flange 56 of the battery mounting portion 34 engages with the protrusion 48 and the bottom 41, thereby forming a hollow closed section (hollow section) together with the mounting portion 55 and the recess 32 (specifically, the bottom 41 and the inclined portion 44). Hereinafter, the hollow closed section is sometimes referred to as the "first hollow closed section".

[0077] like Figure 3 , Figure 6As shown, the reinforcing liner 35 engages with the protrusion 48 from the outside of the recess 32 (i.e., the outside of the vehicle compartment 51). When viewed from above, the reinforcing liner 35 engages with the recess 32 from the outside of the vehicle compartment 51 in a manner overlapping with the battery mounting portion 34, thus being positioned on the outside of the vehicle compartment 51 within the recess 32. The reinforcing liner 35 has a protrusion 62 and a liner flange 63.

[0078] The outer half 63a of the liner flange 63 is inclined and positioned to overlap with the outer half 56a of the inclined portion 44 and the flange 56 in the vertical direction. The outer half 63a of the liner joins the inclined portion 44 and the outer half 56a of the flange 56 from the outside of the recess 32.

[0079] In addition, the inner half 63b of the liner flange 63 is formed horizontally and configured to overlap with the bottom 41 and the inner half 56b of the flange 56 in the vertical direction.

[0080] The inner half 63b of the liner plate joins the bottom 41 and the inner half 56b of the flange 56 from the outside of the recess 32. That is, the reinforcing liner plate 35 is joined to the outside of the recess 32 by joining the protrusion 48 and the bottom 41 from the outside of the compartment 51 through the liner plate flange 63.

[0081] A protrusion 62 is provided at the center of the liner flange portion 63. The protrusion 62 protrudes downward from the center of the liner flange portion 63 and is arranged at intervals relative to the recess 32 (specifically, the bottom 41 and the inclined portion 44). That is, the reinforcing liner 35 is connected to the recess 32 from the outside of the compartment 51 across the intersection 47 of the bottom 41 and the inclined portion 44.

[0082] The flange 63 of the reinforcing liner 35 joins the protrusion 48 and the bottom 41 from the outside of the compartment 51, thereby forming a hollow closed section (hollow section) together with the protrusion 62 and the recess 32 (specifically, the bottom 41 and the inclined portion 44). Hereinafter, the hollow closed section is sometimes referred to as the "second hollow closed section".

[0083] The battery mounting portion 34 and the reinforcing liner 35 are disposed on the front side of the vehicle relative to the left inner inclined portion 25 of the left rear side frame 11. Moreover, the battery mounting portion 34 and the reinforcing liner 35 are disposed on the inner side in the vehicle width direction than the left outer end 15b of the rear crossbeam 15.

[0084] <Battery tray, battery unit>

[0085] like Figure 1 , Figure 4 , Figure 6As shown, a battery tray 18 is disposed above the bottom 41 in the recess 32. The battery tray 18 mounts a plurality of (two in this embodiment) front mounting portions 71 from above to the front crossbeam 14. In addition, the battery tray 18 mounts a plurality of (three in this embodiment) rear mounting portions 72 from above to the rear crossbeam 15.

[0086] In this state, the bottom 73 of the battery tray 18 is positioned between the battery unit 20 (described later) and the bottom 41 of the recess 32. The left end 73a of the bottom 73 is placed above the top 58 of the battery mounting portion 34. The left end 73a of the bottom 73 is mounted to the top 58 by fastening members (in this embodiment, bolts 75 and nuts 76).

[0087] The battery unit 20 is supported (loaded) on the bottom of the tray 73 in a top-mounted position. The battery unit 20 includes a battery body 81 composed of individual battery cells (not shown) and electrical mounting components 82 connected to the battery body 81. That is, the battery body 81 and electrical mounting components 82 are supported on the bottom of the tray 73. The bottom of the tray 73, the battery body 81, and the electrical mounting components 82 (battery unit 20) are connected (fixed) to the battery mounting portion 34 via bolts 75 and nuts 76. In other words, the battery unit 20 is connected to the battery mounting portion 34 via the bottom of the tray 73.

[0088] Here, the battery body 81 is fixed in a position on the left side (one side in the vehicle width direction) of the tray bottom 73. That is, the battery body 81 is disposed on the left side in the vehicle width direction of the recess 32. In addition, the battery fixing part 34 is disposed on the left outer side in the vehicle width direction of the recess 32. Thus, the battery body 81 is disposed on the side close to the battery fixing part 34.

[0089] Furthermore, the electrical mounting component 82 is fixed in a position where it is located on the right side (the other side in the vehicle width direction) of the bottom 73 of the tray. That is, the electrical mounting component 82 is located on the right side in the vehicle width direction of the recess 32.

[0090] The battery body 81 and electrical mounting components 82 are located under the rear seat while supported on the bottom of the tray 73.

[0091] As explained above, the battery-equipped vehicle structure 10 according to the embodiment can achieve the following effects.

[0092] That is, such as Figure 2 , Figure 6As shown, the recess 32 is positioned in the area surrounded by the front crossbeam 14, the rear crossbeam 15, the left rear side frame 11, and the right rear side frame 12. Furthermore, a battery unit 20 is disposed in the recess 32. Therefore, for example, when an impact load F1 is input to the left rear side frame 11 due to a side collision, it is possible to suppress the input of the impact load F1 to the battery unit 20 (particularly the battery body 81).

[0093] Furthermore, the battery unit 20 is positioned on the battery tray 18, and the left end 73a of the battery tray 18 is mounted to the top 58 of the battery mounting portion 34 using bolts 75 and nuts 76. Thus, the battery unit 20 is connected (fixed) to the recess 32 via the battery tray 18 and the battery mounting portion 34. Therefore, the battery unit 20 acts as a mass relative to the recess 32. Consequently, by suppressing vibration of the recess 32 (i.e., the battery loading portion 31) using the battery unit 20, abnormal noise caused by vibration can be suppressed.

[0094] Thus, a recess 32 is provided in the area surrounded by the front crossbeam 14, the rear crossbeam 15, the left rear side frame 11, and the right rear side frame 12, and a battery unit 20 is connected (fixed) to the recess 32 via a battery tray 18. Therefore, it is not necessary to increase the vehicle's Ve (refer to...) Figure 1 The weight of the battery can suppress the input of impact load F1 to the battery unit 20, and can also suppress abnormal noise caused by vibration.

[0095] The flange 56 of the battery mounting portion 34 is joined to the protrusion 48 and the bottom 41, thereby forming a first hollow closed section through the mounting portion 55 and the recess 32 (specifically, the bottom 41 and the inclined portion 44) of the battery mounting portion 34. This improves the rigidity of the battery mounting portion 34. Furthermore, the reinforcing liner 35 is joined to the recess 32 from the outside of the vehicle compartment 51 in a manner that overlaps with the battery mounting portion 34. This further improves the rigidity of the battery mounting portion 34. As a result, the battery unit 20 can be securely supported by the battery mounting portion 34.

[0096] Furthermore, by increasing the rigidity of the battery mounting portion 34, the vibration of the recess 32 can be suppressed, thereby suppressing the abnormal noise caused by vibration.

[0097] Furthermore, a second hollow closed section is formed by the protrusion 62 and recess 32 (specifically, the bottom 41 and the inclined portion 44) of the reinforcing liner 35. This increases the rigidity of the reinforcing liner 35. Consequently, the rigidity of the battery mounting portion 34 is further improved. Therefore, the battery unit 20 can be securely supported by the battery mounting portion 34, and abnormal noise caused by vibration can be suppressed.

[0098] Furthermore, the battery mounting portion 34 is connected to the recess 32 from the inside by crossing the intersection 47 of the bottom 41 of the recess 32 and the inclined portion 44. Moreover, the reinforcing liner 35 is connected to the recess 32 from the outside of the vehicle compartment 51 by crossing the intersection 47. This improves the rigidity of the battery mounting portion 34. Consequently, the battery unit (especially the battery body 81) can be securely supported by the battery mounting portion 34.

[0099] Furthermore, by increasing the rigidity of the battery mounting portion 34, the vibration of the recess 32 can be suppressed, thereby suppressing the abnormal noise caused by vibration.

[0100] like Figure 5 , Figure 6 As shown, the inclined portion 44 has a protrusion 48, and a battery mounting portion 34 and a reinforcing liner 35 are joined to the protrusion 48. This allows the load F2 from the battery unit (particularly the battery body 81) input via the battery mounting portion 34 to be smoothly transferred via the protrusion 48 to the inclined portion 44 (i.e., the recess 32). Consequently, the rigidity of the battery mounting portion 34 can be improved relative to the load F2 input from the battery unit 20.

[0101] Furthermore, by increasing the rigidity of the battery mounting portion 34, the vibration of the recess 32 can be suppressed, thereby suppressing the abnormal noise caused by vibration.

[0102] Furthermore, the lower end portion 44a of the inclined portion 44 is positioned a relatively large distance L1 inward relative to the left rear side frame 11 in the vehicle width direction. A protrusion 48 is formed in the lower half of the inclined portion 44, and a battery mounting portion 34 is engaged with the protrusion 48. As a result, the battery mounting portion 34 can be positioned a relatively large distance L2 inward relative to the left rear side frame 11 in the vehicle width direction.

[0103] Therefore, a gap (space) can be ensured for the deformation of the left rear frame 11 due to the impact load F1 input from the side collision. Therefore, it is possible to suppress the situation where the deformed left rear frame 11 comes into contact with the battery fixing part 34 and the battery unit 20, and to suppress the input of the impact load F1 from the left rear frame 11 to the battery unit 20.

[0104] like Figure 2 , Figure 3As shown, the left inner inclined portion 25 of the left rear side frame 11 is connected to the left outer end portion 15b of the rear crossbeam 15. Furthermore, the battery mounting portion 34 and the reinforcing liner 35 are positioned relative to the left inner inclined portion 25 of the left rear side frame 11 on the front side of the vehicle, and are positioned inside the vehicle width direction of the left outer end portion 15b of the rear crossbeam 15. This allows a portion of the impact load F1 input from a side collision to be efficiently transmitted to the rear crossbeam 15 as load F3 via the left inner inclined portion 25 of the left rear side frame 11. Consequently, the input of the impact load F1 to the battery unit 20 (particularly the battery body 81) and the battery mounting portion 34 can be suppressed.

[0105] like Figure 2 , Figure 4 , Figure 6 As shown, the battery tray 18 is connected (fixed) to the battery mounting part 34 by bolts 75 and nuts 76, and the battery body 81 and electrical mounting components 82 are supported by the battery tray 18. As a result, it is possible to suppress the input of impact load F1, such as that from a side collision, to the battery body 81 and electrical mounting components 82 via the left rear side frame 11, front crossbeam 14 and rear crossbeam 15.

[0106] Furthermore, by supporting the battery body 81 and electrical mounting components 82 via the battery tray 18, the load (weight) F2 input to the battery mounting portion 34 can be increased. As a result, vibration of the recess 32 can be suppressed, thereby suppressing abnormal noise caused by vibration.

[0107] Here, for example, in the case where the battery body 81 and electrical mounting components 82 are only fastened to the front crossbeam 14 and the rear crossbeam 15, it is considered that a relatively large load may be input to the battery body 81 and electrical mounting components 82 due to, for example, a side collision, torsion generated in the vehicle body during steering, road noise (i.e., vibration caused by friction between the tires and the road surface).

[0108] Therefore, a battery tray 18 is connected to the battery fixing part 34 of the battery loading section 31. The battery fixing part 34 is disposed in the area surrounded by the front crossbeam 14, the rear crossbeam 15, and the left rear side frame 11. As a result, deformation of the battery tray 18 caused by factors such as side collisions, torsion of the vehicle body during cornering, and road noise can be suppressed. The battery tray 18 supports the battery body 81 and electrical mounting components 82.

[0109] Therefore, the loads input to the battery body 81 and electrical mounting components 82 (especially the battery body 81) caused by torsion and road noise generated in the vehicle body can be suppressed. As a result, the loads input to the bracket (not shown) connecting the battery tray 18 and the battery body 81 can be reduced, and the connection rigidity between the battery tray 18 and the battery body 81 can be improved.

[0110] Furthermore, the battery body 81 is positioned close to the battery mounting portion 34. This allows the battery mounting portion 34 to efficiently support the battery body 81, which is heavier than the electrical mounting component 82. Consequently, the support rigidity of the battery mounting portion 34 relative to the battery cell 20 is improved.

[0111] Furthermore, the battery mounting portion 34 supports the heavy battery body 81, thereby increasing the mass of the battery body 81 relative to the recess 32. As a result, the battery unit 20 suppresses vibration of the recess 32, thereby suppressing abnormal noise caused by vibration.

[0112] Furthermore, by positioning the battery body 81 close to the battery mounting portion 34, the load input to the battery body 81 due to torsion generated in the vehicle body and road noise can be suppressed more effectively. As a result, the load input to the bracket (not shown) connecting the battery tray 18 and the battery body 81 can be reduced even further.

[0113] It should be noted that the technical scope of the present invention is not limited to the aforementioned embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0114] For example, in the aforementioned embodiment, an example of arranging the battery body 81 on the left outer side in the vehicle width direction was described, but the battery body 81 may also be arranged on the right outer side in the vehicle width direction.

[0115] Furthermore, without departing from the spirit of the present invention, the constituent elements in the foregoing embodiments can be appropriately replaced with well-known constituent elements, and the foregoing variations can also be appropriately combined.

Claims

1. A vehicle structure with a storage battery, wherein, The battery-equipped vehicle structure includes: The battery loading section is equipped with a battery located under the seat; A front crossbeam, which is positioned at the front of the vehicle where the battery is mounted; Rear crossbeam, which is located at the rear of the vehicle where the battery pack is located; and The vehicle body side frame extends along the longitudinal direction of the vehicle from the outer side of the battery mounting section in the vehicle width direction. The battery loading section includes a battery fixing section located on the outer side in the vehicle width direction to connect the battery. The battery mounting section has a recessed portion that is recessed downwards to accommodate the battery. The battery loading section forms a hollow cross section through the battery fixing section and the recess. The vehicle structure with a battery includes a reinforcing liner that, when viewed from above, is disposed on the exterior side of the recessed portion in a manner that overlaps with the battery mounting portion.

2. The vehicle structure with a storage battery according to claim 1, wherein, The battery loading section is surrounded by the front crossbeam, the rear crossbeam, and the vehicle body side frame. The battery fixing part is disposed in the recess.

3. The vehicle structure with a storage battery according to claim 2, wherein, The recess has: The bottom, which is positioned below the battery; and The inclined portion slopes upwards from the bottom towards the outer side in the vehicle width direction. The battery fixing part and the reinforcing liner are connected to the recess in such a way that they cross the intersection of the bottom and the inclined part.

4. The vehicle structure with a storage battery according to claim 3, wherein, The inclined portion has a protrusion that protrudes inward toward the recess. The battery fixing part and the reinforcing liner are engaged with the protrusion.

5. The vehicle structure with a storage battery according to claim 3, wherein, The inclined portion is separated from the side frame of the vehicle body and configured inward in the vehicle width direction.

6. The vehicle structure with a storage battery according to claim 2, wherein, The vehicle body side frame has an inwardly inclined portion, which tilts inward in the vehicle width direction as it faces the rear of the vehicle, and is connected to the outer end of the rear crossbeam in the vehicle width direction. The battery mounting portion and reinforcing liner are disposed on the front side of the vehicle relative to the inner inclined portion, and are disposed at a position inside the vehicle width direction than the outer end of the rear crossbeam.

7. The vehicle structure with a storage battery according to claim 3, wherein, The vehicle structure with a battery includes a battery tray disposed between the battery and the bottom and connected to the battery fixing part. The battery has the following features: The main body of the storage battery is composed of individual battery cells; and Electrical mounting components, which are connected to the battery body, The battery tray supports the battery body and the electrical mounting components.

8. The vehicle structure with a storage battery according to claim 7, wherein, The battery body is disposed on one side of the recess in the vehicle width direction. The electrical mounting component is disposed on the opposite side of the vehicle width direction within the recess. The battery mounting portion is disposed at one end of the recess in the vehicle width direction.

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