Vehicle rear structure

Abstract

This provides a vehicle rear structure capable of protecting a small battery from impacts such as rear-end collisions. [Solution] The rear vehicle structure 100 includes a main battery frame 122 holding a main battery 120, frame fixing parts 134a to 134e provided on the main battery frame 122 and fixed to the rear floor 102, an auxiliary battery tray 126 holding an auxiliary battery 124, and tray fixing parts 132a to 132c provided on the auxiliary battery tray 126 and fixed to the rear floor 102. The frame fixing parts 134a to 134e are fixed to the rear floor 102 in the area above or between the rear side members 106 and 108. The tray fixing parts 132a and 132c are fixed to the rear floor 102 in the area above or between the rear side members 106 and 108, in the area forward of the rear end of the main battery frame 122.

Description

[Technical Field]

[0001] The present invention relates to a vehicle rear structure. [Background Art]

[0002] A rear floor of a vehicle may be provided with an auxiliary battery for supplying electric power to electrical components called so-called auxiliaries other than a power unit such as a motor. For example, FIG. 2 of Patent Document 1 discloses a state where a battery 6 is arranged on a floor panel 3 at a rear portion of the vehicle. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2022-125882 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] The technology of Patent Document 1 is configured to avoid contact between the battery 6 and a slide rail 7 during a rear-end collision in a vehicle provided with a fuel tank 9. However, since structures around the auxiliary battery differ depending on vehicles, there remains room for improvement in a configuration that protects the auxiliary battery from impact such as a rear-end collision.

[0005] In view of such a problem, an object of the present invention is to provide a vehicle rear structure capable of protecting an auxiliary battery from impact such as a rear-end collision. [Means for Solving the Problem]

[0006] To solve the above problems, a typical configuration of the vehicle rear structure according to the present invention is a vehicle rear structure comprising: a rear floor of a vehicle; a pair of rear side members extending in the longitudinal direction of the vehicle along the left and right sides of the lower side of the rear floor; a main battery frame positioned above the rear floor and holding a main battery that supplies power to the vehicle's power unit; a plurality of frame fixing parts provided on the main battery frame and fixed to the rear floor; an auxiliary battery tray positioned above the rear floor and holding an auxiliary battery that supplies power to predetermined electrical components of the vehicle; and a plurality of tray fixing parts provided on the auxiliary battery tray and fixed to the rear floor, wherein the plurality of frame fixing parts are fixed to the upper part of the pair of rear side members or to the part between the pair of rear side members of the rear floor, and at least one of the plurality of tray fixing parts is fixed to the upper part of the pair of rear side members or to the part between the pair of rear side members of the rear floor and to the part in front of the rear end of the main battery frame. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a vehicle rear structure that can protect the auxiliary battery from impacts such as rear-end collisions. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows a vehicle rear structure according to an embodiment of the present invention. [Figure 2] Figure 1(a) shows the fixing points for the main battery frame and the auxiliary battery tray. [Figure 3] Figure 2(b) shows the structure below the rear floor of the vehicle's rear structure. [Figure 4] This figure shows the rear structure of the vehicle in Figure 2(a) viewed from a different direction. [Figure 5] Figure 2(a) is a cross-sectional view of the rear vehicle structure, specifically the BB section. [Figure 6] This figure shows the rear floor of Figure 4(a) and a modified rear floor. [Modes for carrying out the invention]

[0009] A vehicle rear structure according to one embodiment of the present invention comprises a rear floor of a vehicle, a pair of rear side members extending in the longitudinal direction of the vehicle along the left and right sides of the lower side of the rear floor, a main battery frame positioned above the rear floor and holding a main battery that supplies power to the vehicle's power unit, a plurality of frame fixing parts provided on the main battery frame and fixed to the rear floor, an auxiliary battery tray positioned above the rear floor and holding an auxiliary battery that supplies power to predetermined electrical components of the vehicle, and a plurality of tray fixing parts provided on the auxiliary battery tray and fixed to the rear floor, wherein the plurality of frame fixing parts are fixed to the upper part of the pair of rear side members or to the part between the pair of rear side members of the rear floor, and at least one of the plurality of tray fixing parts is fixed to the upper part of the pair of rear side members or to the part between the pair of rear side members of the rear floor and to the part forward of the rear end of the main battery frame.

[0010] The rear side members described above are structural components of the vehicle that extend in the front-to-rear direction, and can exhibit high rigidity against forces in the front-to-rear direction. Furthermore, the area of ​​the rear floor in front of the rear end of the main battery frame is less prone to deformation in rear-end collisions, etc., because the main battery frame absorbs impacts from the rear. Therefore, with the above configuration, it is possible to protect the auxiliary battery tray from impacts such as rear-end collisions.

[0011] At least one of the above-mentioned tray fixing parts may be coupled to the main battery frame and indirectly fixed to the rear floor via the main battery frame.

[0012] The auxiliary battery tray described above can be fixed to the rear floor with greater rigidity by having at least one of its tray fixing parts connected to the main battery frame. Therefore, with the above configuration, the mounting rigidity of the auxiliary battery tray can be improved, making it possible to protect the auxiliary battery tray from impacts such as rear-end collisions.

[0013] At least one of the above-mentioned frame fixing parts may be located behind the tray fixing part that is coupled to the main battery frame.

[0014] With the above configuration, at least one frame fixing part is located behind the part of the main battery frame to which the auxiliary battery tray is attached, so that the impact from a rear collision or the like can be received and dispersed by the main battery frame before it reaches the auxiliary battery tray. Therefore, even with the above configuration, it is possible to protect the auxiliary battery tray from impacts such as rear collisions.

[0015] The above-described rear vehicle structure further includes a predetermined reinforcement member positioned in the area between a pair of rear side members on the underside of the rear floor, and at least one of the multiple frame fixing parts and multiple tray fixing parts may be fixed to the area above the reinforcement member on the rear floor.

[0016] The area of ​​the rear floor where the reinforcement members are installed is reinforced by the reinforcement members and has high rigidity. Therefore, by fixing the auxiliary battery tray or main battery frame to this area, it is possible to protect the auxiliary battery and main battery from impacts such as rear-end collisions.

[0017] At least one of the above-mentioned frame fixing points and tray fixing points may be fixed to the upper part of the rear floor, above the rear side member.

[0018] Of the above rear floor, the area where the rear side members are installed is reinforced by the rear side members and has high rigidity. Therefore, by fixing the auxiliary battery tray or the main battery frame in this area, it becomes possible to protect the auxiliary battery and the main battery from impacts such as rear-end collisions. [Example]

[0019] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Dimensions, materials, other specific numerical values and the like shown in these embodiments are merely illustrative for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit repeated description, and illustrations of elements not directly related to the present invention are omitted.

[0020] Fig. 1 is a diagram showing a vehicle rear structure 100 according to an embodiment of the present invention. Fig. 1(a) is a perspective view of the vehicle rear structure 100 as viewed from the front upper left.

[0021] Hereinafter, in Fig. 1 and all other drawings of the present application, the vehicle front-rear direction is illustrated by arrows F (Forward) and B (Backward), the left and right in the vehicle width direction are illustrated by arrows L (Leftward) and R (Rightward), and the vehicle vertical direction is illustrated by arrows U (Upward) and D (Downward), respectively.

[0022] The vehicle rear structure 100 includes a rear floor 102 and a rear member 104. The rear floor 102 is a panel member that constitutes the floor of the rear portion of the vehicle. The rear member 104 is a general term for members connected to the rear end of the rear floor 102, and is implemented including, for example, a back panel, a tail end member, and the like.

[0023] The vehicle rear structure 100 includes a main battery assembly 116 and an auxiliary battery assembly 118 on the upper side of the rear floor 102.

[0024] The main battery assembly 116 consists of a main battery 120 and a main battery frame 122. The main battery 120 is a battery that supplies power to the power unit, which is the power source of the vehicle. The main battery frame 122 is located above the rear floor 102 and encloses and holds the main battery 120.

[0025] The auxiliary battery assembly 118 consists of an auxiliary battery 124 and an auxiliary battery tray 126. The auxiliary battery 124 is smaller than the main battery 120 and supplies power to electrical components such as wipers and lights. The auxiliary battery tray 126 is located slightly behind and to the right of the main battery assembly 116 on the upper part of the rear floor 102, and holds and supports the auxiliary battery 124.

[0026] Figure 1(b) is a perspective view of the vehicle rear structure 100 of Figure 1(a) as seen from the rear left upper. In Figure 1(b), the rear member 104 of Figure 1(a) is omitted, and the auxiliary battery assembly 118, etc., are shown.

[0027] The auxiliary battery assembly 118 is installed slightly to the rear on the right side in the vehicle width direction of the main battery assembly 116. The auxiliary battery 124 is placed on the auxiliary battery tray 126 and is held in place by the holder member 128 being connected from above.

[0028] The vehicle rear structure 100 includes a pair of rear side members 106, 108 and a reinforcement member 110 on the underside of the rear floor 102. The pair of rear side members 106, 108 are elongated members extending in the longitudinal direction of the vehicle and are provided along the left and right sides on the underside of the rear floor 102, respectively.

[0029] In this embodiment, the reinforcement member 110 is implemented as a fastening member having a towing hook 130. The reinforcement member 110 is located on the underside of the rear floor 102, in the area between a pair of rear side members 106 and 108.

[0030] The main battery frame 122 is fixed to the rear floor 102 by multiple fixing points such as the frame fixing points 134b, 134c, and 134d shown in Figure 1(b). The auxiliary battery tray 126 is fixed to the rear floor 102 by multiple fixing points such as the tray fixing point 132b.

[0031] Figure 2 shows the fixing parts of the main battery frame 122 and auxiliary battery tray 126 of Figure 1(a). Figure 2(a) is a view of the main battery frame 122 and auxiliary battery tray 126 of Figure 1(a) from above.

[0032] In Figure 2(a), the main battery 120 (see Figure 1(b)) and the auxiliary battery 124 are omitted. Also, in Figure 2(a), the rear side members 106, 108 and the reinforcement member 110 on the underside of the rear floor 102 are shown with dashed lines.

[0033] The main battery frame 122 and the auxiliary battery tray 126 are positioned adjacent to each other in the vehicle width direction when viewed from above.

[0034] The auxiliary battery tray 126 is fixed to the rear floor 102 by a plurality of tray fixing parts 132a to 132c. The tray fixing parts 132a to 132c are fixed to the rear floor 102 by fasteners such as bolts or by welding.

[0035] The tray fixing portion 132a is formed by projecting forward the area at the right end of the front edge in the vehicle width direction of the auxiliary battery tray 126. The tray fixing portion 132b is formed by projecting rearward the area at the right end of the rear edge in the vehicle width direction of the auxiliary battery tray 126.

[0036] The tray fixing portion 132c is formed on the left side edge of the auxiliary battery tray 126 in the vehicle width direction, and is located between the tray fixing portions 132a and 132b in the vehicle longitudinal direction, with the portion protruding to the left in the vehicle width direction.

[0037] Figure 2(b) is a diagram showing the main battery frame 122 with the auxiliary battery tray 126 of Figure 2(a) omitted.

[0038] The main battery frame 122 is fixed to the rear floor 102 by a plurality of frame fixing parts 134a to 134d. The frame fixing parts 134a to 134d are fixed to the rear floor 102 by fasteners such as bolts or by welding.

[0039] Frame fixing parts 134a and 134b are located on the lower right side of the main battery frame 122 in the vehicle width direction, and are arranged in the front-to-back direction. Frame fixing parts 134c and 134d are located on the lower left side of the main battery frame 122 in the vehicle width direction, and are arranged in the front-to-back direction.

[0040] Figure 3 shows the structure below the rear floor 102 of the vehicle rear structure 100 in Figure 2(b). Figure 3(a) shows the structure below the rear floor 102 in Figure 2(b) as seen through the rear floor 102.

[0041] The rear floor 102 is provided with multiple floor fixing points 136a to 136f for fixing the tray fixing parts 132a and 132b (see Figure 2(a)) and the frame fixing parts 134a to 134d (see Figure 2(b)).

[0042] In this embodiment, floor fixing points 136a to 136f are implemented as through holes for fastening bolts. Alternatively, floor fixing points 136a to 136f can also be used as points for welding the main battery frame 122 and the auxiliary battery tray 126 together.

[0043] Floor fixing points 136a and 136b are used to fix the tray fixing parts 132a and 132b of the auxiliary battery tray 126 (see Figure 2(a)). Floor fixing points 136c to 136f are used to fix the frame fixing parts 134a to 134d of the main battery frame 122 (see Figure 2(b)).

[0044] The floor fixing points 136a and 136b are located on the upper part of the rear side member 106 on the right side in the vehicle width direction of the rear floor 102. In other words, the tray fixing parts 132a and 132b in Figure 2(a) are fixed to the upper part of the rear side member 106 of the rear floor 102.

[0045] The floor fixing point 136d is located in the upper part of the reinforcement member 110 of the rear floor 102. As a result, the frame fixing part 134b (see Figure 2(b)) is fixed to the upper part of the reinforcement member 110 of the rear floor 102.

[0046] The floor fixing points 136e and 136f are located on the upper part of the rear side member 108 on the left side in the vehicle width direction of the rear floor 102. As a result, the frame fixing parts 134c and 134d in Figure 2(b) are fixed to the upper part of the rear side member 108 of the rear floor 102.

[0047] Figure 3(b) is a view of the vehicle rear structure 100 of Figure 3(a) from below.

[0048] The rear side member 106 extends in the longitudinal direction beneath the rear floor 102, and its rear end is connected to the rear member 104. Cross members 112 and 114 are also provided beneath the rear floor 102. The cross members 112 and 114 extend in the vehicle width direction and connect the rear side members 106 and 108.

[0049] Two brace members 164 and 166 are also provided on the underside of the rear floor 102. The brace members 164 and 166 extend in the front-rear direction and connect the cross member 112 and the cross member 114.

[0050] The reinforcement member 110 is installed in a position closer to the right rear side member 106 with respect to the center of the rear floor 102 in the vehicle width direction. The reinforcement member 110 has an elongated configuration in the vehicle longitudinal direction, with its rear end connected to the rear member 104 and its front end connected to the cross member 112.

[0051] The rear side members 106 and 108, the cross members 112 and 114, the brace members 164 and 166, and the reinforcement member 110 are each joined to the rear floor 102 by welding or the like. The rear member 104 is joined by welding or the like across the rear end of the rear floor 102, the rear ends of the rear side members 106 and 108, and the rear end of the reinforcement member 110.

[0052] Figure 4 shows the vehicle rear structure 100 of Figure 2(a) viewed from a different direction. Figure 4(a) shows the vehicle rear structure 100 of Figure 2(a) viewed from the inside in the vehicle width direction.

[0053] The reinforcement member 110 has a downward bulge 138 as the part where the towing hook 130 is installed. The downward bulge 138 is formed in a downward bulge state to facilitate the use of the towing hook 130.

[0054] Furthermore, the reinforcement member 110 is not limited to its embodiment as a fastening member, but can also be implemented as a reinforcing member that reinforces the underside of the rear floor 102, for example. In either embodiment, the reinforcement member 110 is an existing member implemented separately from the auxiliary battery assembly 106 (see Figure 1(a)).

[0055] Figure 4(b) is a cross-sectional view AA of the vehicle rear structure 100 shown in Figure 2(a). The auxiliary battery tray 126 is fixed to the rear floor 102, extending over the rear side member 106 and the reinforcement member 110 in the vehicle width direction.

[0056] The tray fixing portion 132a is fixed to the floor fixing point 136a of the rear floor 102 using bolts 146 and nuts 148 in the upper part of the rear side member 106. The nuts 148 can be used when a bracket 150 is installed inside the rear side member 106 and the nuts 148 are joined to this bracket 150.

[0057] The tray fixing portion 132c is fixed to a connecting hole 137 provided in the main battery frame 122. The connecting hole 137 is provided in the leg portion of the main battery frame 122 that is in contact with the rear floor 102. A bolt 140 is fixed to the connecting hole 137 by welding or the like, inserted from below. The tray fixing portion 132c is fixed to the bolt 140 by fastening a nut 142 over it from above.

[0058] Figure 5 is a cross-sectional view of the BB of the vehicle rear structure 100 in Figure 2(a). This BB cross-section is a cross-sectional view of the reinforcement member 110 along the front-rear direction.

[0059] The frame fixing portion 134b of the main battery frame 122 is fixed to the upper part of the rear floor 102 above the reinforcement member 110.

[0060] The frame fixing portion 134a of the main battery frame 122 is fixed to the floor fixing point 136c of the rear floor 102 using bolts 152 and nuts 154.

[0061] The floor fixing point 136c is located in the upper part of the rear floor 102, above the brace member 164. As shown in Figure 3(b), the brace member 164 is joined to the rear floor 102 and the cross members 112 and 114. In other words, the floor fixing point 136c is located in a highly rigid part of the rear floor 102.

[0062] A bracket 156 is provided on the inside of the brace member 164. The bracket 156 is joined to the inside of the brace member 164. The nut 154 is used while joined to the bracket 156. With this configuration, the installation rigidity of the bolt 152 and nut 154 is increased, and the frame fixing point 134a can be fixed to the floor fixing point 136c with high rigidity.

[0063] The frame fixing portion 134b of the main battery frame 122 is fixed to the floor fixing point 136d of the rear floor 102 using a bolt 158 ​​and a nut 160.

[0064] The floor fixing point 136d is located in the upper part of the rear floor 102, above the reinforcement member 110. As shown in Figure 3(b), the reinforcement member 110 is joined to the rear floor 102, the cross member 112, and the rear member 104. In other words, the floor fixing point 136d is located in a highly rigid area of ​​the rear floor 102.

[0065] A bracket 162 is provided on the inside of the reinforcement member 110. The bracket 162 is joined to the underside of the rear floor 102. The nut 160 is used while joined to the bracket 162. This configuration increases the installation rigidity of the bolt 158 ​​and nut 160, allowing the frame fixing point 134b to be fixed to the floor fixing point 136d with high rigidity.

[0066] The tray fixing portion 132c of the auxiliary battery tray 126 is fixed to the connecting hole 137 of the main battery frame 122. The tray fixing portion 132c is fixed to the connecting hole 137 using a bolt 140 and a nut 142. As a result, the tray fixing portion 132c of the auxiliary battery 126 is connected to the main battery frame 122 and indirectly fixed to the rear floor 102 via frame fixing points 134a and 134b.

[0067] As shown in Figure 2(a), in this embodiment, the frame fixing portions 134a and 134b of the main battery frame 122 are fixed to the rear floor 102 in the area between the rear side members 106 and 108 in the vehicle width direction. In particular, the frame fixing portion 134b is fixed to the area above the reinforcement member 110. The frame fixing portions 134c and 134d are fixed to the area above the rear side member 108.

[0068] The rear side member 108 and the reinforcement member 110 are both members joined to the underside of the rear floor 102, and they serve to increase the rigidity of the rear floor 102. In the rear structure 100 of the vehicle, the mounting rigidity of the main battery frame 122 can be increased by fixing the frame fixing parts 134b to 134d to the upper part of these rear side members 108 and reinforcement member 110.

[0069] The tray fixing portions 132a to 132c of the auxiliary battery tray 126 are fixed to the rear floor 102 in the area between the rear side member 106 and the rear side member 108. In particular, the tray fixing portions 132a and 132b are fixed to the area above the rear side member 106. Furthermore, the tray fixing portion 132c is indirectly fixed to the area above the brace member 164 (see Figure 5) and the reinforcement member 110 of the rear floor 102 via the main battery frame 122 and frame fixing portions 134a and 134b.

[0070] With the above configuration, the auxiliary battery tray 126 in Figure 2(a) is fixed on the rear floor 102 in the area between the rear side members 106 and 108 in the vehicle width direction, and in a position that overlaps with the rear side member 106 and the reinforcement member 110. Both the rear side member 106 and the reinforcement member 110 are members joined to the underside of the rear floor 102 and serve to increase the rigidity of the rear floor 102. In this vehicle rear structure 100, it is possible to increase the mounting rigidity of the auxiliary battery tray 126 by utilizing these rear side members 106 and the reinforcement member 110.

[0071] The imaginary line L1 in Figure 2(a) is a hypothetical line segment extending in the vehicle width direction along the rear end of the main battery frame 122. In this embodiment, the tray fixing portions 132a and 132c of the auxiliary battery tray 126 are provided in the rear floor 102 in the area forward of the imaginary line L1.

[0072] The rear side members 106 and 108 are structural members of the vehicle that extend in the longitudinal direction and can exhibit high rigidity against longitudinal forces. Furthermore, the portion of the rear floor 102 in front of the rear end of the main battery frame 122 is less prone to deformation in rear-end collisions, etc., because the main battery frame 122 absorbs impacts from the rear. Therefore, in this embodiment, it is possible to protect the auxiliary battery tray 126 from impacts such as rear-end collisions.

[0073] The tray fixing portions 132a and 132c of the auxiliary battery tray 126 are located in the area forward of the virtual line L1, resulting in a configuration where they are positioned to the side of the main battery frame 122 in the vehicle width direction.

[0074] With the above configuration, even if the rear floor 102 in Figure 1(b) is deformed from the rear end due to a rearward collision or the like, the tray fixing parts 132a and 132c (see Figure 2(a)) of the auxiliary battery tray 126 are located to the side of the main battery assembly 116 in the vehicle width direction, which prevents these tray fixing parts 132a and 132c from falling off the rear floor 102.

[0075] In other words, in this embodiment, the rigidity of the main battery assembly 116 is used to protect the auxiliary battery assembly 118 during a rear collision, thereby preventing the auxiliary battery assembly 118 from falling off the rear floor 102.

[0076] In addition, in Figure 2(a), it is also possible to fix all of the tray fixing portions 132a to 132c of the auxiliary battery tray 126 to the area in front of the imaginary line L1 on the rear floor 102. With this configuration, in the event of a rear collision, the auxiliary battery assembly 118 can be better protected using the main battery assembly 116 (see Figure 1(b)).

[0077] In this embodiment, the frame fixing portions 134c and 134d of the main battery frame 122, and the tray fixing portions 132a and 132b of the auxiliary battery tray 126 are fixed to the upper areas of the rear side members 106 and 108 of the rear floor 102, respectively.

[0078] The area of ​​the rear floor 102 where the rear side members 106 and 108 are installed is reinforced by the rear side members 106 and 108, resulting in high rigidity. Therefore, by fixing the auxiliary battery tray 126 and the main battery frame 122 to this area, it is possible to protect the auxiliary battery 124 and the main battery 120 from impacts such as rear collisions.

[0079] The frame fixing portion 134b of the main battery frame 122 in Figure 2(b) is fixed to the upper part of the reinforcement member 110 of the rear floor 102.

[0080] The area of ​​the rear floor 102 where the reinforcement member 110 is installed is reinforced by the reinforcement member 110 and has high rigidity. Therefore, by fixing the frame fixing portion 134b of the main battery frame 122 to this area, it is possible to protect the auxiliary battery 124 and the main battery 120 from impacts such as rear collisions.

[0081] Refer again to Figure 4(b). The auxiliary battery tray 126 is provided with a coupling portion 144. The coupling portion 144 is the part where the tray fixing portion 132c is formed, and it can be superimposed on the upper side around the connecting hole 137 of the main battery frame 122. The coupling portion 144 is connected to the main battery frame 122 by fastening the tray fixing portion 132c and the connecting hole 137 with bolts 140 and nuts 142.

[0082] The tray fixing portion 132c is connected to the main battery frame 122 by the connecting portion 144, and the tray fixing portion 132c is indirectly fixed to the rear floor 102 via the main battery frame 122. With this configuration, the auxiliary battery tray 126 can be fixed to the rear floor 102 with greater rigidity while also being connected to the main battery frame 122. This configuration improves the installation rigidity of the auxiliary battery tray 126, making it possible to protect the auxiliary battery tray 126 from impacts such as rear-end collisions.

[0083] Refer to Figure 5 again. The frame fixing part 134b is fixed to the rear floor 102 behind the connecting hole 137 which is connected to the tray fixing part 132c.

[0084] The frame fixing portion 134b is provided behind the tray fixing portion 132c, allowing the main battery frame 122 to receive and disperse the impact of a rear-end collision or the like before the auxiliary battery tray 126. This configuration also protects the auxiliary battery tray 126 from impacts such as rear-end collisions.

[0085] Figure 6 shows the rear floor 102 of Figure 4(a) and a modified rear floor 202. Figure 6(a) shows the rear floor 102 of Figure 4(a).

[0086] In this embodiment, the auxiliary battery assembly 118 and the main battery assembly 116 (see Figure 1(b)) are mounted on the upper side of the rear floor 102. The area above the rear floor 102 is located inside the vehicle body structure formed by the rear floor 102, rear side members 106 and 108, and cross members 112 and 114.

[0087] In this embodiment, by mounting the auxiliary battery assembly 118 on the upper side of the rear floor 102, it is possible to reduce the possibility of contact between the auxiliary battery assembly 118 and the main battery assembly 116 (see Figure 1(b)) and the impacting object when the impacting object comes into contact with the vicinity of the rear member 104 during a rearward collision, compared to when it is mounted on the lower side of the rear floor 102.

[0088] Figure 6(b) shows a modified example (rear floor 202) of the rear floor 102 in Figure 4(a). The rear floor 202 of the vehicle rear structure 200 has a recessed area 204 that is lowered at the rear of the vehicle.

[0089] The recess 204 is an area used, for example, to secure cargo space in the vehicle. The auxiliary battery assembly 118 and the main battery assembly 116 (see Figure 1(b)) can also be mounted on the upper side of the recessed area of ​​the rear floor 202, similar to the recess 204.

[0090] Even when the auxiliary battery assembly 118 is mounted in the recess 204, it remains mounted above the rear floor 202. Even inside the recess 204, it is still an area located inside the vehicle body structure formed by the rear floor 202, rear side members 106 and 108, and cross members 112 and 114.

[0091] In this modified example as well, by mounting the auxiliary battery assembly 118 on the upper side of the rear floor 202, it is possible to reduce the possibility of contact between the auxiliary battery assembly 118 and the main battery assembly 116 (see Figure 1(b)) and the impacting object when the impacting object comes into contact with the vicinity of the rear member 104 during a rearward collision, compared to when it is mounted on the lower side of the rear floor 202.

[0092] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these examples. It is clear to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention. [Industrial applicability]

[0093] This invention can be used in the rear structure of a vehicle. [Explanation of Symbols]

[0094] 100...Rear vehicle structure, 102...Rear floor, 104...Rear member, 106, 108...Rear side member, 110...Reinforcement member, 112...Cross member, 114...Cross member, 116...Main battery assembly, 118...Auxiliary battery assembly, 120...Main battery, 122...Main battery frame, 124...Auxiliary battery, 126...Auxiliary battery tray, 128...Holder member, 130...Towing hook, 132a~132c...Tray fixing part 134a~134d...frame fixing part, 136a~136f...floor fixing point, 137...connecting hole, 138...downward bulge, 140...bolt, 142...nut, 144...joint part, 146...bolt, 148...nut, 150...bracket, 152...bolt, 154...nut, 156...bracket, 158...bolt, 160...nut, 162...bracket, 164, 166...brace member, L1...dimension line, 200...vehicle rear structure, 202...rear floor, 204...recess

Claims

1. The rear floor of the vehicle, A pair of rear side members extending in the vehicle's longitudinal direction along the left and right sides of the lower part of the rear floor, A main battery frame, which holds the main battery that supplies power to the vehicle's power unit and is located above the rear floor, Multiple frame fixing parts provided on the main battery frame and fixed to the rear floor, An auxiliary battery tray, located above the rear floor, holds an auxiliary battery that supplies power to a predetermined electrical component of the vehicle, In a vehicle rear structure comprising the auxiliary battery tray and a plurality of tray fixing parts provided on the auxiliary battery tray and fixed to the rear floor, The plurality of frame fixing parts are fixed to the upper part of the pair of rear side members or to the area between the pair of rear side members of the rear floor, The rear vehicle structure is characterized in that at least one of the plurality of tray fixing parts is fixed to the rear floor in a range above the pair of rear side members or in a range between the pair of rear side members, and in a range forward of the rear end of the main battery frame.

2. The vehicle rear structure according to claim 1, characterized in that at least one of the plurality of tray fixing parts is coupled to the main battery frame and indirectly fixed to the rear floor via the main battery frame.

3. The vehicle rear structure according to claim 2, characterized in that at least one of the plurality of frame fixing parts is provided behind the tray fixing part coupled to the main battery frame.

4. The aforementioned vehicle rear structure further includes a predetermined reinforcement member positioned in the area between the pair of rear side members on the underside of the rear floor, The vehicle rear structure according to any one of claims 1 to 3, characterized in that at least one of the plurality of frame fixing parts and the plurality of tray fixing parts is fixed to the upper part of the rear floor above the reinforcement member.

5. The vehicle rear structure according to any one of claims 1 to 3, characterized in that at least one of the plurality of frame fixing parts and the plurality of tray fixing parts is fixed to the upper part of the rear floor above the rear side member.

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