JP7252877B2 - battery housing unit - Google Patents

Description

The present invention relates to a battery housing unit for housing a battery under the vehicle body of a motor vehicle.

BACKGROUND ART Conventionally, a structure described in Patent Document 1 is known as a structure for housing a battery in the lower part of the vehicle body of an automobile. The structure includes a bottom plate, a peripheral wall, and a top plate. The bottom plate is connected to and supported by a side sill (rocker in Patent Document 1) that constitutes the lower portion of the vehicle body. The peripheral wall includes left and right side wall portions, a front wall portion, and a rear wall portion, and is arranged on the bottom plate so as to surround a battery housing space on the bottom plate. The top plate is fastened to the peripheral wall so as to cover the accommodation space.

In the structure, each of the bottom plate, the peripheral wall, and the top plate is made of a light metal such as an aluminum alloy in order to reduce the weight of the vehicle as a whole. Specifically, the bottom plate is made of a press-molded plate made of an aluminum alloy or the like. Each of the left and right side walls, the front wall, and the rear wall, which constitute the peripheral wall, is made of an extruded profile material extruded from an aluminum alloy or the like so as to have a hollow cross section, and is welded to the bottom wall. fixed by means of

JP-A-2007-313426

As described above, the structure for housing the battery in the lower part of the vehicle body of the automobile is required to be waterproof to prevent water from entering the battery housing space in addition to the weight reduction. However, in the structure described in Patent Document 1, the top plate, the left and right side walls, the front wall portion, and the rear wall portion are configured as members separate from each other. Water easily enters the storage space, and in order to prevent the water from entering, a complicated sealing structure must be provided between the respective members.

SUMMARY OF THE INVENTION An object of the present invention is to provide a battery housing unit capable of ensuring high waterproofness without requiring a complicated structure.

In order to achieve the above object, the present inventors have conceived of forming the container body from a deep-drawn product made of an aluminum alloy. In the deep-drawn product, the bottom wall and the peripheral wall of the container body can be continuous, so unlike products in which the bottom wall and the peripheral wall are made of separate members, high waterproofness can be achieved without using a complicated sealing structure. It is possible to ensure the reliability.

However, the deep-drawn product, especially the aluminum alloy deep-drawn product, has an R shape with a relatively large radius of curvature at the corner in order to avoid wrinkles and breakage at the corner during forming. In other words, an outwardly convex curved surface shape must be provided, which causes the inconvenience of reducing the battery housing area. Specifically, when a container body in which a bottom wall and a peripheral wall are integrally connected by an aluminum alloy deep-drawn product is constructed, the boundary between the bottom wall peripheral edge and the peripheral wall corresponds to the boundary part of the bottom wall peripheral edge. must be given a curved shape with a relatively large radius of curvature, which leads to a reduction in the area of the space (viewed from above) on the bottom wall that can accommodate the battery.

The present invention has been made from such a viewpoint. SUMMARY OF THE INVENTION The present invention provides a battery housing unit for housing a battery in the underbody of a vehicle body, comprising a deep drawn part made of an aluminum alloy, comprising a bottom wall and a container integrally connected therewith. a container body having a peripheral wall surrounding at least part of an inner space; a lid attached to the container body so as to cover the container inner space at a position above the container body; an inner bottom wall. An inner surface of a bottom wall peripheral edge boundary portion, which is a boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface. The internal bottom wall is positioned above the bottom wall, and a battery housing space for housing the battery is formed above the internal bottom wall.

In this battery housing unit, the bottom wall and the peripheral wall of the container body are integrally connected by forming the container body from a deep-drawn product made of an aluminum alloy, so that the bottom wall and the peripheral wall are separated from each other. Unlike a container composed of a member, it is possible to ensure high waterproofness without requiring a complicated sealing structure. In this container body, the inner surface of the bottom wall peripheral edge boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall, needs to be configured with an outwardly convex curved surface for deep drawing. The battery housing unit further includes an inner bottom wall joined to the inner surface of the peripheral wall at a position above the bottom wall of the container body inside the container body, and the battery is housed on the inner bottom wall. Since the space is formed, it is possible to secure a larger storage area for the battery than when the battery is placed directly on the bottom wall. That is, the inner bottom wall is a new bottom surface of the battery housing space in the container body at a position above the bottom wall, that is, the area of the flat portion of the top surface of the bottom wall excluding the peripheral boundary of the bottom wall. By defining a bottom surface having an area larger than that of the boundary portion, a large usable area (that is, the area surrounded by the peripheral wall) can be secured at the upper position regardless of the curved surface shape of the boundary portion.

Moreover, by utilizing the arrangement of the inner bottom wall, it is possible to secure a lower protective space interposed between the inner bottom wall and the bottom wall of the container body. The lower protection space can effectively prevent the load applied from the road surface to the bottom wall of the container body from being transferred to the battery on the inner bottom wall, thereby effectively protecting the battery from the load. can do.

The inner bottom wall may be arranged at a height position above the bottom wall, for example, at an intermediate height position of the bottom wall peripheral edge boundary portion, that is, a position lower than the upper end of the bottom wall peripheral edge boundary portion. , but preferably above the bottom wall peripheral boundary (for example, at the height of the upper end of the bottom wall peripheral boundary). This makes it possible to secure the maximum usable area on the inner bottom wall without being affected by the shape of the bottom wall peripheral edge boundary portion (outwardly convex curved surface shape).

A 5000-series aluminum alloy, which is excellent in formability, is used for the container body composed of a deep-drawn product, while the inner bottom wall, which does not require a complicated shape compared to the container body, is made of a 5000-series aluminum alloy. It is possible to adopt a plate material made of a 6000 series aluminum alloy, which has low formability but high strength. This means that while employing a 5000 series aluminum alloy for the container body for deep drawing of the container body, the inner bottom wall is placed on the inner bottom wall by an inner bottom wall made of a stronger 6000 series aluminum alloy. It is possible to effectively protect the battery that is used.

It is preferable that the battery housing unit further includes a bottom wall reinforcing portion that is interposed between the bottom wall and the internal bottom wall to suppress upward deformation of the bottom wall. The bottom wall reinforcing portion can effectively reinforce the bottom wall of the container body while being compactly arranged using the lower protective space.

The bottom wall reinforcing portion includes a plurality of bottom wall reinforcing members each extending in a specific longitudinal direction along the bottom wall and the inner bottom wall, the plurality of bottom wall reinforcing members extending in a direction orthogonal to the longitudinal direction. are preferably spaced apart. Such a distributed arrangement of a plurality of bottom wall reinforcing members can effectively reinforce the bottom wall over a wide area with a lighter structure than, for example, an embodiment using a single bottom wall reinforcing member having a large area. It is possible.

Specifically, each of the plurality of bottom wall reinforcing members includes a bottom wall facing portion that extends in the longitudinal direction and is capable of facing and contacting the upper surface of the bottom wall, and a bottom wall facing portion that extends in the longitudinal direction and can contact the lower surface of the inner bottom wall and a connecting portion extending in the longitudinal direction and connecting the bottom wall facing portion and the internal bottom wall facing portion in the vertical direction, preferred. Such a bottom wall reinforcing member can effectively reinforce the bottom wall while having a simple cross-sectional shape.

More specifically, one of the inner bottom wall facing portion and the bottom wall facing portion is a first facing portion and a second facing portion respectively extending in the longitudinal direction while being spaced apart from each other in a direction orthogonal to the longitudinal direction. and the other is an intermediate facing portion extending in the longitudinal direction at a position between the first opposing portion and the second opposing portion, and the connecting portion connects the intermediate opposing portion and the first opposing portion It is preferable to include a first connecting portion vertically connecting a first connecting portion and a second connecting portion vertically connecting the intermediate facing portion and the second facing portion. Such a bottom wall reinforcing member can have high rigidity against a vertical compressive load.

It is preferable that the longitudinal direction of each of the plurality of bottom wall reinforcing members is parallel to the longitudinal direction of the vehicle body. This makes it possible to suppress deformation of the bottom wall reinforcing member when a load including a component in the longitudinal direction of the vehicle body acts on the bottom wall reinforcing member while the vehicle is running.

The bottom wall reinforcing member having the above-described cross-sectional shape can be made of an extruded profile made of 7000 series aluminum alloy. Since 7000 series aluminum alloy has higher strength than 5000 series and 6000 series aluminum alloys, it is possible to effectively reinforce the bottom wall. The 7000 series aluminum alloy, on the other hand, has the property of being relatively susceptible to stress corrosion cracking. Therefore, stress corrosion cracking can be effectively prevented even if the bottom wall reinforcing member is made of a 7000 series aluminum alloy.

The battery housing unit further includes a side sill connecting member interposed between a side sill positioned outside the container body in the lateral direction of the vehicle body and the container body, the side sill connecting member connecting the container body to the side sill. It is preferable that the container body is connected to the side sill via a member so as to be supported by the side sill.

In this case, the side sill connecting member has a plurality of closed cross sections arranged in the left-right direction so that the side sill connecting member is crushed by an impact load acting inward in the left-right direction of the vehicle body to absorb the impact load. is preferred. The side sill connecting member functions as a connecting member that connects the container body to the side sill to support the container body, and also functions as a reinforcing member that absorbs impact load applied to the side sill. is possible.

Further, when the side sill connecting member includes a lateral wall extending in the lateral direction of the vehicle body, at least a part of the vertical thickness region of the lateral wall corresponds to the vertical thickness of the inner bottom wall in the vertical direction of the vehicle body. It preferably overlaps at least part of the region. This allows the laterally inward load applied from the side sills to the side sill connecting member to be well transmitted from the lateral wall to the inner bottom wall, whereby the inner bottom wall effectively carries the load. make it possible to receive

INDUSTRIAL APPLICABILITY As described above, the present invention provides a battery housing unit capable of ensuring high waterproofness and a large battery housing area without requiring a complicated structure.

1 is a partially cross-sectional perspective view of a battery housing unit according to an embodiment of the present invention; FIG. FIG. 3 is a plan view showing a container body and internal reinforcing members of the battery housing unit according to the embodiment; It is the perspective view which looked at the bottom corner part of the container main body which concerns on the said embodiment, and its peripheral part from the diagonally downward direction. FIG. 2 is a cross-sectional view showing a main part of the battery housing unit according to the embodiment, and is a front view showing a cross section of the main part along the left-right direction of the vehicle body; FIG. 5 is a side view showing a cross section along line VV of FIG. 4;

Preferred embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a battery housing unit according to an embodiment of the invention. This battery accommodation unit accommodates the battery 4 shown in FIG. 2 in the lower part of the vehicle body of an automobile, and includes the container body 10, the lid 20, the inner bottom wall 30, and the plurality of bottom wall reinforcing members shown in FIG. 40 , a plurality of internal stiffeners 50 , a plurality of cross members 60 and a pair of side sill connecting members 70 .

The battery housing unit is arranged between the left and right side sills 2 forming the lower portion of the vehicle body. The left and right side sills 2 are arranged, for example, at positions below the door pillars so as to extend in the front-rear direction.

The container body 10 has a shape that opens upward, and constitutes a battery container for accommodating the battery 4 together with the lid 20 . The battery 4 is composed of a plurality of battery modules 6 in this embodiment. Each battery module 6 is an assembly of a plurality of battery cells. The battery container accommodates the plurality of battery modules 6 in a state of being horizontally arranged.

The container body 10 is made of a deep-drawn aluminum alloy. Specifically, the container body 10 according to this embodiment is deep-drawn from a 5000 series aluminum alloy, which has excellent formability among aluminum alloys, so as to integrally have a bottom wall 12 and a peripheral wall 14. It is. More preferably, the container body 10 is composed of a deep-drawn product made of a 5000-series O heat-treated material, which is particularly excellent in moldability among 5000-series aluminum alloys. In this manner, the container body 10, which is a deep-drawn product in which the bottom wall 12 and the peripheral wall 14 are integrally continuous, has a complicated sealing structure, unlike the conventional container in which the bottom wall and the peripheral wall are separate members. In other words, it is possible to prevent the intrusion of water into the container body 10 without requiring a

The bottom wall 12 is flat and has a substantially rectangular planar shape. The container main body 10 is incorporated in the vehicle body in such a posture that the bottom wall 12 is substantially horizontal. Specifically, it is attached to the right and left side sills 2 via the pair of side sill connecting members 70 .

The peripheral wall 14 is integrally connected to the bottom wall 12 so as to rise upward from the peripheral edge of the bottom wall 12 . The peripheral wall 14 has a shape surrounding the lower half of the space above the bottom wall 12 and having a substantially rectangular shape in a plan view. Specifically, the peripheral wall 14 integrally has a right side wall 14a, a left side wall 14b, a front side wall 14f and a rear side wall 14r. The right side wall 14a and the left side wall 14b are positioned on the right side and the left side of the container interior space in the left-right direction of the vehicle body and extend in the front-rear direction of the vehicle body. The front side wall 14f and the rear side wall 14r are positioned on the front side and the rear side of the container inner space in the longitudinal direction of the vehicle body and extend in the lateral direction of the vehicle body.

The peripheral wall 14 has a plurality of corners. In this embodiment, the plurality of corners are a right front corner 14fa, a left front corner 14fb, a right rear corner 14ra, and a left rear corner 14rb, each of which is the depth dimension of the container body 10, i.e. It extends vertically by the height dimension of the peripheral wall 14 . The right front corner portion 14fa is a boundary portion between the front wall 14f and the right side wall 14a, and the right end portion of the front wall 14f and the front end portion of the right side wall 14a are integrally connected at the right front corner portion 14fa. The left front corner portion 14fb is a boundary portion between the front side wall 14f and the left side wall 14b, and the left end portion of the front side wall 14f and the front end portion of the left side wall 14b are integrally connected at the left front corner portion 14fb. The right rear corner portion 14ra is a boundary portion between the rear wall 14r and the right side wall 14a. Connect. The left rear corner portion 14rb is a boundary portion between the rear wall 14r and the left side wall 14b. Connect.

Further, the container body 10 has a bottom wall peripheral edge boundary portion 13 which is a boundary portion between the peripheral edge of the bottom wall 12 and the lower edge of the peripheral wall 14 . The bottom wall peripheral edge boundary portion 13 includes a boundary portion between the right edge of the bottom wall 12 and the right side wall 14a, a boundary portion between the left edge of the bottom wall 12 and the left side wall 14b, and a boundary portion between the bottom wall 12 and the left side wall 14b. It includes a boundary portion between the front edge and the front wall 14f and a boundary portion between the rear edge of the bottom wall 12 and the rear wall 14r.

In the container body 10, the plurality of corners 14fa, 14fb, 14ra, and 14rb and the bottom wall peripheral boundary portion 13 are provided with wrinkles and breakage during deep drawing of the container body 10 to avoid wrinkles and breakage. An R shape is given. That is, the container body 10 is molded such that the inner surfaces of the plurality of corners 14fa, 14fb, 14ra, 14rb and the bottom wall peripheral boundary portion 13 are outwardly convex curved surfaces. The radius of curvature of the curved surface is set according to the conditions of the deep drawing. In particular, connecting portions between the respective lower ends of the plurality of corners 14fa, 14fb, 14ra, and 14rb and the four corners of the bottom wall peripheral boundary portion 13, in other words, the lower ends of the corners 14fa, 14fb, 14ra, and 14rb. , is provided with a larger radius of curvature. FIG. 3 shows a container bottom corner portion 15 corresponding to the lower end portion of the right rear corner portion 14ra among the container bottom corner portions.

The lid 20 is attached to the container body 10 so as to cover the inner space of the container on the upper side of the container body 10 . The lid 20 according to this embodiment integrally has a top wall 22 and a peripheral wall 24 . The ceiling wall 22 has a planar shape (substantially rectangular in this embodiment) corresponding to the planar shape of the bottom wall 12 of the container body 10 . The peripheral wall 24 has a planar shape (substantially rectangular shape in this embodiment) corresponding to the planar shape of the peripheral wall 14 of the container body 10, and the peripheral edge of the ceiling wall 22 protrudes downward from the peripheral edge. connected with.

Flanges 26, 16 protrude outward from the lower edge of the peripheral wall 24 of the lid 20 and the upper edge of the peripheral wall 14 of the container body 10, respectively. They are detachably connected to each other in a mated state. In the illustrated example, both flange portions 26 and 16 are fastened with a plurality of bolts 28 via a seal material (not shown). The container internal space is a space between the top wall 22 of the lid 20 and the bottom wall 12 of the container body 10, and is surrounded by the lid 20 and the peripheral walls 24, 14 of the container body 10. Space.

The material of the lid 20 is not particularly limited. The lid 20 can be manufactured, for example, by press forming a plate material made of a 5000 series aluminum alloy, preferably an O tempered material of a 5000 series aluminum alloy.

The inner bottom wall 30 has a flat plate shape and is positioned above the bottom wall peripheral edge boundary portion 13, that is, the R-shaped portion inside the container body 10, preferably the bottom wall peripheral edge boundary portion. It is arranged parallel to the bottom wall 12 at a position where the upper end of 13 and the lower surface of the inner bottom wall 30 almost coincide. The internal bottom wall 30 has a peripheral edge portion having a shape corresponding to the planar shape of the inner surface of the peripheral wall 14 above the bottom wall peripheral edge boundary portion 13 , and the peripheral edge portion is welded to the inner surface of the peripheral wall 14 . or the like. As a result, the inner bottom wall 30 defines the lower end surface of the battery housing space Sb as shown in FIGS. do. That is, the battery housing space Sb is formed on the inner bottom wall 30 . Specifically, the plurality of battery modules 6 constituting the battery 4 are arranged horizontally and placed on the inner bottom wall 30 in the battery container composed of the container body 10 and the lid 20 . can be accommodated.

The material of the inner bottom wall 30 is not particularly limited. However, the inner bottom wall 30 is not required to have a complicated shape like the container body 10, and may have a simple shape such as a flat plate. Aluminum alloys having lower formability and higher strength than tempered materials, such as H tempered materials of 5000 series aluminum alloys, and aluminum alloys having lower formability and higher strength than 5000 series aluminum alloys, such as It can be made of a plate made of 6000 series aluminum alloy. These allow more reliable protection of the battery 4 mounted on the inner bottom wall 30 .

By arranging the inner bottom wall 30 on the upper side of the bottom wall peripheral boundary part 13 in the inner space of the container, the battery is placed between the upper surface of the inner bottom wall 30 and the lower surface of the top wall 22 of the lid 20 . In addition to the accommodation space Sb, a lower protection space Su is defined between the lower surface of the inner bottom wall 30 and the upper surface of the bottom wall 12 as shown in FIGS. The lower protective space Su receives the load applied to the bottom wall 12 from the road surface, generally an upward load, or absorbs the impact energy, so that the impact caused by the load is transferred to the top of the inner bottom wall 30 . It is possible to suppress the transmission to the battery 4 arranged in the .

The plurality of bottom wall reinforcing members 40 are arranged in the lower protective space Su and form a bottom wall reinforcing portion interposed between the lower surface of the inner bottom wall 30 and the upper surface of the bottom wall 12 . The plurality of bottom wall reinforcing members 40 contribute to maintaining the distance between the lower surface of the inner bottom wall 30 and the upper surface of the bottom wall 12 by the interposition. In other words, the plurality of bottom wall reinforcing members 40 prevent the bottom wall 12 from being deformed upward, that is, toward the inner bottom wall 30 due to the load. In addition, when the load is greater, the plurality of bottom wall reinforcing members 40 are crushed and deformed to absorb impact energy, thereby preventing damage to the battery 4 disposed on the inner bottom wall 30. do.

Each of the plurality of bottom wall reinforcements 40 extends linearly in a specific longitudinal direction along the bottom wall 12 and the inner bottom wall 30, and the plurality of bottom wall reinforcements 40 are orthogonal to the longitudinal direction. They are arranged at intervals in the arrangement direction. In this embodiment, the longitudinal direction is the longitudinal direction of the vehicle body, and the arrangement direction is the lateral direction of the vehicle body.

Each of the plurality of bottom wall reinforcements 40 has a uniform cross section along its length. Specifically, each of the bottom wall reinforcing members 40 includes a right facing portion 41 that is a first facing portion, a left facing portion 42 that is a second facing portion, an intermediate facing portion 44, and a right side facing portion 44 that is a first connecting portion. It integrally has a connecting portion 45 and a left connecting portion 46 as a second connecting portion.

The right and left facing parts 41 and 42 are internal bottom wall facing parts each having an upper surface that faces the lower surface of the internal bottom wall 30 in the vertical direction and is capable of contacting the lower surface, and is perpendicular to the longitudinal direction. are spaced apart from each other in the left-right direction and extend in the longitudinal direction. The right and left facing portions 41 and 42 are preferably joined to the lower surface of the inner bottom wall 30 by means of welding or the like. The intermediate facing portion 44 is a bottom wall facing portion that vertically faces the upper surface, that is, the back surface of the bottom wall 12 and has a lower surface that can come into contact with the upper surface. extends in the longitudinal direction at an intermediate position of the The intermediate facing portion 44 is preferably joined to the upper surface of the bottom wall 12 by means of welding or the like. The right connecting portion 45 vertically connects the right end of the intermediate facing portion 44 and the left end (inner end) of the right facing portion 41 , and the left connecting portion 46 connects the intermediate facing portion 44 . The left end and the right end (inner end) of the left facing portion 42 are vertically connected. That is, the right connecting portion 45 and the left connecting portion 46 are connecting portions that extend in the longitudinal direction and vertically connect the bottom wall facing portion and the inner bottom wall facing portion.

In the bottom wall reinforcing member 40, the right facing portion 41 and the left facing portion 42 correspond to the bottom wall facing portion facing the upper surface of the bottom wall 12, and conversely, the middle facing portion 44 corresponds to the inner bottom wall 30. It may have a cross-sectional shape corresponding to the inner bottom wall facing portion facing the lower surface of the .

The bottom wall reinforcing member 40 having such a uniform cross section can be made of, for example, an extruded profile made of 7000 series aluminum alloy. This allows the bottom wall reinforcement 40 to have high strength and stiffness. The 7000 series aluminum alloy has a property that stress corrosion cracking is more likely to occur than, for example, 5000 series or 6000 series aluminum alloys. Therefore, even if the bottom wall reinforcing member 40 is formed of an extruded profile made of a 7000 series aluminum alloy, stress corrosion cracking can be effectively suppressed.

The plurality of internal reinforcing members 50 are arranged inside the peripheral wall 14 on the upper side of the internal bottom wall 30 along the peripheral wall 14 to reinforce the battery container from the inside. Each of the plurality of internal reinforcing members 50 has a shape extending linearly in one direction and is fixed to the container body 10 . Preferably, they are joined to the inner surface of the peripheral wall 14 and the upper surface of the inner bottom wall 30 by welding or the like.

The plurality of internal reinforcing members 50 include a right internal reinforcing member 50A, a left internal reinforcing member 50B, a front internal reinforcing member 50F and a rear internal reinforcing member 50R. The right internal reinforcing member 50A is arranged inside, ie, on the left side of, the right side wall 14a along the right side wall 14a. The left internal reinforcing member 50B is arranged inside, ie, on the right side of, the left side wall 14b along the left side wall 14b. The front internal reinforcing member 50F is arranged inside or rearward of the front wall 14f along the front wall 14f. The rear internal reinforcing member 50R is arranged inside, ie, on the front side of, the rear wall 14r along the rear wall 14r. In the following description, "a plurality of internal reinforcing members 50" is used as a generic term for the right internal reinforcing member 50A, the left internal reinforcing member 50B, the front internal reinforcing member 50F, and the rear internal reinforcing member 50R.

Each of the plurality of internal reinforcing members 50 is arranged so as to be interposed between the battery 4 accommodated in the battery accommodation space Sb and the peripheral wall 14 . In other words, the space surrounded by the plurality of internal reinforcing members 50 on the upper side of the internal bottom wall 30 in the internal space of the container constitutes the battery housing space Sb. The battery housing space Sb is capable of housing the plurality of battery modules 6 in a state in which the plurality of battery modules 6 constituting the battery 4 are arranged vertically and horizontally (in the longitudinal direction and the lateral direction of the vehicle body). It has a size and shape (in this embodiment, a substantially rectangular shape in a plan view).

Each of the plurality of internal reinforcing members 50 is made of 7000 series aluminum alloy. Preferably, each of the plurality of internal reinforcing members 50A, 50B, 50F, 50R is made of an extruded profile made of 7000 series aluminum alloy. This allows each of the internal stiffeners 50A, 50B, 50F, 50R to extend linearly in a particular longitudinal direction and have a uniform cross-sectional shape along that longitudinal direction. Such a shape allows each of the plurality of internal reinforcing members 50 to be efficiently arranged inside along the peripheral wall 14 and joined to the inner surface of the peripheral wall 14 and the upper surface of the internal bottom wall 30. make it easier to In addition, it is possible to effectively protect the battery 4 housed therein while enclosing a wide battery housing space Sb inside the internal reinforcing members 50A, 50B, 50F, and 50R. As the 7000-series aluminum alloy constituting the internal reinforcing member 50, it is preferable to use a peak-aged material (T5 refining material) having particularly high strength (for example, a 0.2% yield strength of 300 MPa or more).

As described above, the 7000 series aluminum alloy is more prone to stress corrosion cracking than the 5000 series or 6000 series aluminum alloys. 10, even if the plurality of internal reinforcing members 50 are made of a 7000 series aluminum alloy, stress corrosion cracking can be effectively suppressed.

Each of the plurality of internal reinforcing members 50 has a hollow cross-section surrounding an internal space as shown in FIG. The outer wall 52 has a vertically elongated substantially rectangular shape, and includes a right wall 52a, a left wall 52b, an upper wall 52c and a lower wall 52d located on the right side, the left side, the upper side and the lower side of the inner space. The horizontal rib 54 is arranged to horizontally cross the internal space at a vertical middle height position in the cross section of the internal reinforcing member 50, and is located at a vertical middle portion of the right wall 52a and the left wall 52b. has two ends each connected to a . The internal reinforcing member 50 having such a hollow cross section contributes to weight reduction of the vehicle, and has a thickness in the vertical direction. It can have strength enough to withstand the load of

Each of the plurality of internal reinforcing members 50 has a height dimension substantially equal to the height dimension of the battery housing space Sb defined above the internal bottom wall 30 in the container internal space. Specifically, the lower surface of the lower wall 52d is joined to the upper surface of the inner bottom wall 30, and the outer surface of the lower half of the right wall 52a and the left wall 52b located outside the container is the outer surface of the container. The internal reinforcement members 50A, 50B, 50F, and 50R are joined to the inner surface of the peripheral wall 14 of the main body 10, and in this state, the upper halves of the internal reinforcing members 50A, 50B, 50F, and 50R protrude above the upper end of the peripheral wall 14. As shown in FIG. The upper half is surrounded by a peripheral wall 24 of the lid 20 which is attached to the upper end of the peripheral wall 14 .

The four internal reinforcing members 50A, 50B, 50F, 50R form a frame along the inner surface of the peripheral wall 14 as a whole. The frame has a rectangular shape as shown in FIG. 2 and has four corners corresponding to the four corners 14fa, 14fb, 14ra and 14rb of the peripheral wall 14, respectively. However, the inner surfaces of the four corners 14fa, 14fb, 14ra, and 14rb are outwardly convex curved surfaces for deep drawing of the container body 10 as described above, and the shape thereof is that of the frame. It does not match the shape of the four corners. Therefore, each of the four corners of the frame is obliquely cut so as to avoid interference between the two.

Specifically, the front internal reinforcing member 50F is arranged between the front ends of the right and left internal reinforcing members 50A, 50B, and the front internal reinforcing member 50F is arranged between the rear ends of the right and left internal reinforcing members 50A, 50B. A rear internal reinforcing member 50R is arranged, and front and rear end portions of the right and left internal reinforcing members 50A and 50B respectively constitute the four corner portions. Therefore, in this embodiment, the outer portions of the front and rear end portions of the right and left internal reinforcing members 50A and 50B are obliquely cut so as to avoid interference with the inner surfaces of the four corner portions 14fa, 14fb, 14ra and 14rb. As shown in FIGS. 1 and 2, oblique sides 55 are formed inside the corners 14fa, 14fb, 14ra, and 14rb.

It should be noted that the plurality of internal reinforcing members 50 are not essential components of the present invention. That is, the plurality of internal reinforcing members 50 may be omitted. For example, the battery 4 may be arranged immediately inside the peripheral wall 14 without the internal reinforcing member 50 interposed therebetween.

The plurality of cross members 60 are efficiently arranged between the plurality of battery modules 6 adjacent to each other among the plurality of battery modules 6 arranged vertically and horizontally in the battery receiving space Sb, and the plurality of internal reinforcing members 50 are arranged. effectively reinforces the battery container from the inside. The plurality of cross members 60 can also function as partition members that partition the battery housing space Sb into a plurality of module housing spaces respectively corresponding to the plurality of battery modules 6 .

Each of the plurality of cross members 60 has a shape extending linearly in one direction and has a cross-sectional shape similar to that of each of the plurality of internal reinforcing members 50 . That is, each of the plurality of cross members 60 has a height dimension substantially equal to the height dimension of the plurality of internal reinforcing members 50 and has a hollow cross section surrounding the internal space.

Specifically, each of the plurality of cross members 60 has an outer wall 62 surrounding the interior space and lateral ribs 64 horizontally across the interior space, as shown in FIG. 5, for example. Like the outer wall 52, the outer wall 62 has a vertically elongated substantially rectangular shape, and has a right wall 62a, a left wall 62b, an upper wall 62c, and a lower wall positioned on the right side, the left side, the upper side, and the lower side of the inner space, respectively. 62d included. The horizontal rib 64 is arranged to horizontally cross the internal space at a vertical middle height position in the cross section of the cross member 60, and is located at a vertical middle portion of the right wall 62a and the left wall 62b. It has two ends that are connected to each other. The cross member 60 having such a hollow cross section contributes to weight reduction of the vehicle, and has a thickness in the vertical direction. It can have strength enough to withstand the load.

Like the plurality of internal reinforcing members 50, the plurality of cross members 60 extending in one direction and having a uniform cross section in this manner can be constructed of extruded profiles made of a 7000 series aluminum alloy having high strength. It is possible. Moreover, since the plurality of cross members 60 are arranged inside the container body 10 in the same manner as the plurality of internal reinforcing members 50, stress corrosion cracking can be effectively suppressed even if the member is made of a 7000 series aluminum alloy. It is possible to For each of the plurality of cross members 60, it is possible to use a 7000-series peak aged material having particularly high strength.

In this embodiment, the plurality of battery modules 6 are arranged in a plurality of rows (six rows in the example shown in FIG. 1), which is two rows on the left and right and two rows on the front and rear, as shown in FIGS. be done. Corresponding to this arrangement, the plurality of cross-members 60 includes a single longitudinal cross-member 60A and a greater number of lateral cross-members 60B (five in the example shown in FIG. 1). In the following description, "a plurality of cross members 60" is a general term for the vertical cross member 60A and the plurality of horizontal cross members 60B.

The vertical cross member 60A is arranged to extend in the longitudinal direction of the vehicle body between the battery modules 6 adjacent to each other in the lateral direction of the vehicle body. The longitudinal cross member 60A has a length that allows its front and rear end portions to contact (preferably be joined by welding or the like) the inner surfaces of the laterally intermediate portions of the front and rear internal reinforcing members 50F and 50R. have

Each of the plurality of horizontal cross members 60B is arranged between the vertical cross member 60A and the right and left internal reinforcing members 50A and 50B in the lateral direction of the vehicle body between the battery modules 6 adjacent to each other in the longitudinal direction of the vehicle body. arranged to extend. Each of the horizontal cross members 60B has its right and left ends in contact with the right side or left side of the vertical cross member 60A and the right internal reinforcing member 50A or the left internal reinforcing member 50B (preferably joined by welding or the like). have a length that allows

The width dimension (horizontal dimension in cross section) of each of the plurality of cross members 60 is preferably smaller than the width dimension of each of the plurality of internal stiffeners 50 . When a lateral load acts between the cross members 60, the internal reinforcing member 50 absorbs the lateral load by bending deformation of the internal reinforcing member 50, so it is preferable that the internal reinforcing member 50 has high bending strength. For that purpose, it is preferable that the width dimension of the internal reinforcing member 50 is large. On the other hand, since the cross member 60 receives a load in the compression direction via the internal reinforcing member 50, it is preferable that it have a high compressive strength. don't need it. Therefore, it is preferable to increase the thickness of the cross member 60 to secure its compressive strength while keeping the width of the cross member 60 small to secure a large accommodation area for the plurality of battery modules 6 .

The plurality of cross members 60 is also not an essential component of the present invention. That is, the plurality of cross members 60 may be omitted. For example, the plurality of battery modules 6 may be arranged directly adjacent to each other without the cross member 60 interposed therebetween. Alternatively, a battery consisting of a single module may be housed in the battery housing space.

The pair of side sill connecting members 70 are arranged so as to be interposed between the container body 10 and the left and right side sills 2 respectively positioned on both outer sides of the container body 10 in the left-right direction of the vehicle body. The container body 10 is connected to the side sills 2 so that the container body 10 is supported by the left and right side sills 2 via the pair of side sill connecting members 70 .

The side sill connecting member 70 according to this embodiment includes a plurality of side sill connecting members arranged in the left-right direction so as to be crushed by an impact load acting on the side sill 2 inward in the left-right direction of the vehicle body and absorb the load. It has closed cross-sections 76 (four in the illustrated example). Each of the plurality of closed cross sections 76 has a shape surrounding a rectangular internal space in this embodiment. The side sill connecting member 70 having such a structure functions as a supporting member that enables the battery container to be supported by the side sill 2, and also absorbs the impact load to It is possible to function as a reinforcing member that effectively protects the battery 4 that is housed.

Specifically, the side sill connecting member 70 includes an upper outer wall 71 , a lower outer wall 72 , an inner outer wall 73 , an outer outer wall 74 , and at least one, preferably a plurality of (three in the illustrated example) longitudinal ribs 75 . and including.

The upper and lower outer walls 71 and 72 are arranged parallel to each other with a space therebetween in the vertical direction, and are horizontal walls extending in the horizontal direction of the vehicle body in this embodiment. Each of the upper and lower outer walls 71 and 72 includes both ends in the left-right direction of the vehicle body, that is, an inner end near the container body 10 and an end opposite to the side sill 2 . and an outer end, which is the near end. The inner end is the left end of the right side sill connecting member 70 and the right end of the left side sill connecting member 70, and the outer end is the right end of the right side sill connecting member 70 and the left side sill. In the connecting member 70, it is the left end.

The inner outer wall 73 is integrally connected to the inner ends of the upper and lower outer walls 71 and 72 so as to connect the inner ends of the upper and lower outer walls 71 and 72 in the vertical direction. It is integrally connected with the outer end so as to be connected in the vertical direction. The plurality of longitudinal ribs 75 are respectively arranged at a plurality of positions aligned in the left-right direction at approximately equal intervals between the inner outer wall 73 and the outer outer wall 74. It connects integrally with the upper and lower outer walls 71 and 72 so as to connect the portion of 72 in the vertical direction.

Therefore, in the side sill connecting member 70 according to this embodiment, a pair of horizontal members made up of the upper and lower outer walls 71 and 72 and a pair of horizontal members selected from the inner outer wall 73, the outer outer wall 74 and the plurality of vertical ribs 75 are selected. Each of the plurality of closed cross-sections 76 is constituted by two vertical members which are connected to each other. For example, the innermost closed section 76 in the left-right direction of the vehicle body includes the inner outer wall 73, the vertical rib 75 adjacent thereto, and the portion of the upper outer wall 71 between the inner outer wall 73 and the vertical rib 75. , and a portion of the lower outer wall 72 between the inner outer wall 73 and the longitudinal rib 75 .

In the illustrated side sill connecting member 70, the thickness of the portions of the upper and lower outer walls 71 and 72 that form each of the plurality of closed cross sections 76 decreases in order from the outer side to the inner side in the left-right direction of the vehicle body. . That is, the upper and lower outer walls 71 and 72 have a thickness that gradually decreases from the outer side to the inner side in the left-right direction of the vehicle body, with a plurality of positions connected to the vertical members as boundaries. The region in which the side sill connecting member 70 is deformed by receiving an impact load is the narrowest on the side near the collision surface (the outer side in the lateral direction of the vehicle body) and widens from the outer side to the inner side in the lateral direction of the vehicle body. Such thickness distribution helps the side sill connecting member 70 to be evenly crushed by an impact load acting inward in the lateral direction of the vehicle body. That is, since the deformation range of the inner closed cross-section is wider than that of the outermost closed cross-section among the plurality of closed cross-sections, the load actually applied to the closed cross-section decreases from the outside to the inside. Reducing the thickness of the upper and lower outer walls 71 and 72 from the outer side to the inner side prevents an extreme increase in the load accompanying the progress of the deformation, thereby keeping the side sill connecting member 70 relatively constant. Enables crushing deformation with similar loads.

Although the specific material of the side sill connecting member 70 is not limited, it is preferably a lightweight aluminum alloy. In particular, an over-aged material (T7 tempered material), which has excellent compressibility and relatively excellent stress corrosion cracking resistance among 7000 series, and a 6000 series extruded profile, which has excellent stress corrosion cracking resistance, are suitable. be.

In the lateral direction of the vehicle body, the inner end of the side sill connecting member 70 constitutes a container connecting portion connected to the container body 10 , and the outer end constitutes a side sill connecting portion connected to the side sill 2 . Specifically, the inner end portion of the side sill connecting member 70 is fastened to the flange portion 16 of the container body 10 using, for example, the bolt 28, and the outer end portion of the side sill connecting member 70 is similarly fastened to a suitable portion of the side sill 2. to be concluded.

In this embodiment, as shown in FIG. 4, the relative positions of the right and left side sill connecting members 70 with respect to the container body 10 in the height direction, ie, the vertical direction of the vehicle body, are determined under the following conditions (a) to ( c) is set to satisfy.
(a) In the right and left side sill connecting members 70, either one of the upper outer wall 71 and the lower outer wall 72 (in this embodiment, the upper outer wall 71) is a horizontal member that has a thickness in the vertical direction and extends in the horizontal direction of the vehicle body. ) of the right and left internal reinforcing members 50A and 50B are lateral ribs 54 and the lower wall, which are horizontal members having a thickness in the vertical direction and extending in the lateral direction of the vehicle body. 52d (the lateral ribs 54 in this embodiment) overlaps with at least a portion of the vertical thickness region of the right and left internal reinforcing members 50A and 50B. The height position of the upper outer wall 71 matches.
(b) At least a part of the vertical thickness region of one of the upper outer wall 71 and the lower outer wall 72 (the lower outer wall 72 in this embodiment) of the right and left side sill connecting members 70 is The height position of the inner bottom wall 30 coincides with the height position of the lower outer wall 72 to such an extent that it overlaps with at least a portion of the vertical thickness region of the inner bottom wall 30 .
(c) In the plurality of cross members 60, at least a part of the vertical thick regions of the upper wall 62c, the lower wall 62d, and the horizontal ribs 64, which are horizontal walls having a thickness in the vertical direction and extending in the horizontal direction, At least a portion of the vertical thickness region of the upper wall 52c, the lower wall 52d, and the lateral rib 54, which are horizontal walls of the internal reinforcing member 50 with which the end of the cross member 60 of the plurality of internal reinforcing members 50 contacts. The height positions of the respective horizontal walls match each other to the extent that they overlap.

Satisfaction of the conditions (a) and (b) ensures that the horizontal load applied from the side sill 2 to the side sill connecting member 70 is well transmitted to the lateral ribs 54 of the internal reinforcing member 50 and the internal bottom wall 30. This makes it possible to effectively counter the load. Satisfaction of condition (c) also enables good load transfer between the transverse ribs 64 of the cross member 60 and the transverse ribs 54 of the internal stiffeners 50 contacting the cross member 60, which Therefore, the cross member 60 can effectively function as a reinforcing member.

In order to obtain the above effects, all of the conditions (a) to (c) do not necessarily have to be satisfied at the same time. Even if only one of the conditions (a) to (c) is satisfied, the effect corresponding to that condition is obtained.

In the battery storage unit described above, the container body 10 is made of, for example, a 5000-series aluminum alloy, preferably a deep-drawn product made of an O tempering material of a 5000-series aluminum alloy, so that the container body 10 is highly waterproof. can give. As described above, the inner surface of the bottom wall peripheral boundary portion 13 of the container body 10 made of the deep-drawn product has an outwardly convex curved surface as described above, but is arranged above the bottom wall peripheral boundary portion 13 . Regardless of the shape of the bottom wall peripheral boundary portion 13, the internal bottom wall 30 secures a battery housing space Sb having a wide area in a plan view above the internal bottom wall 30. That is, the internal bottom wall It is possible to reserve a large usable area for housing the battery 4 on 30 . It is also possible to form a lower protection space Su below the inner bottom wall 30 to absorb the load from the road surface.

The present invention is not limited to the embodiments described above. The present invention includes, for example, the following aspects.

(A) Battery Container In the above embodiment, the container main body 10 defines the lower half of the battery housing space Sb, and the lid 20 defines the upper half of the battery housing space Sb. It can be appropriately set within a range that satisfies the condition that the peripheral wall 14 of the container body 10 surrounds at least part of the battery space. For example, the present invention also includes a mode in which the peripheral wall of the container body surrounds the entire battery housing space, and a flat lid is attached to the peripheral wall so as to cover the battery housing space from above.

When both the container body 10 and the lid 20 are made of aluminum alloy deep-drawn products, it is desirable to keep the forming depth of the plate material forming both parts small in order to ensure formability. When the internal reinforcing member 50 is arranged inside the peripheral wall 14 of the container body 10 as in the above-described embodiment, the container body 10 and the lid are arranged from the viewpoint of securing the height dimension of the internal reinforcing member 50. Preferably, the ratio of molding depths of 20 is from 3:7 to 5:5.

Further, the aluminum alloy constituting the container body according to the present invention is not limited to the 5000 series O temper material, and may be, for example, a 6000 series aluminum alloy, preferably a 6000 series T4 temper material.

(B) Internal bottom wall The internal bottom wall 30 according to the above embodiment is arranged above the bottom wall peripheral edge boundary part 13, but the internal bottom wall according to the present invention is at least the bottom of the container main body. If the battery is placed above the wall, the mounting area, ie, the battery housing area, can be increased as compared to when the battery is mounted on the bottom wall. Therefore, the inner bottom wall may be arranged at a position below the upper end of the bottom wall peripheral boundary, for example, at a position in the middle of the bottom peripheral boundary in the vertical direction. However, arranging the inner bottom wall above the bottom perimeter boundary eliminates the influence of the shape of the bottom perimeter boundary, thereby maximizing the battery housing area. In this case, the closer the height position of the lower surface of the internal bottom wall is to the height position of the upper end of the bottom peripheral edge boundary, the greater the height dimension of the battery housing space above the internal bottom wall can be increased. be.

The specific material and shape of the inner bottom wall can also be set appropriately. The inner bottom wall may be made of an aluminum alloy other than the 6000 series aluminum alloy, for example, an H-tempered material of a 5000 series aluminum alloy.

(C) Bottom Wall Reinforcing Portion The bottom wall reinforcing portion according to the present invention is not limited to one including a plurality of bottom wall reinforcing members 40 as shown in FIG. 1 and the like. The bottom wall reinforcing portion can take various forms as long as it satisfies the condition that the bottom wall reinforcing portion is interposed between the bottom wall of the container body and the internal bottom wall to suppress the upward deformation of the bottom wall.

For example, instead of the plurality of bottom wall reinforcing members 40 shown in FIG. is also possible. The single bottom wall stiffener may be, for example, a plate having a corrugated cross-section that alternately contacts the upper surface of the bottom wall 12 and the lower surface of the inner bottom wall 30 shown in FIG. It is possible. The plate material can be made of, for example, a press-formed plate material made of a 5000 series aluminum alloy.

In this way, the bottom wall reinforcing portion including a plurality of bottom wall reinforcing members 40 according to the above-described embodiment has a lightweight structure and can cover a wide area, as compared with a mode in which the bottom wall reinforcing portion includes only a single bottom wall reinforcing member. It is possible to effectively protect the bottom wall.

This effect can be obtained even in an arrangement in which the longitudinal direction coincides with a direction different from the front-rear direction of the vehicle body, such as the left-right direction of the vehicle body. However, the arrangement in which the longitudinal direction of each bottom wall reinforcing member 40 coincides with the longitudinal direction of the vehicle body as in the above-described embodiment does not allow the bottom wall reinforcing member 40 to move in the longitudinal direction of the vehicle while the vehicle is running. It is possible to suppress the deformation of the bottom wall reinforcing member 40 when a load containing the component of is applied. For example, when the longitudinal direction of the bottom wall reinforcing member 40 coincides with the lateral direction of the vehicle body, the load in the longitudinal direction of the vehicle acts on the bottom wall reinforcing member 40 in a direction orthogonal to the longitudinal direction. Therefore, the right and left connecting portions 45 and 46 are tilted so that the intermediate facing portion 44 of the bottom wall reinforcing member 40, which is the bottom wall facing portion, is horizontally displaced in the direction of the load along the lateral direction of the vehicle. Such deformation is likely to occur. On the other hand, when the longitudinal direction of the bottom wall reinforcing member 40 coincides with the longitudinal direction of the vehicle, the load in the longitudinal direction of the vehicle is applied to the bottom wall reinforcing member 40 in its longitudinal direction, that is, the direction of high rigidity. Therefore, the deformation of the bottom wall reinforcing member 40 caused by the load is effectively suppressed.

The cross-sectional shape of each of the plurality of bottom wall reinforcing members is also not limited. The bottom wall reinforcing member includes at least a bottom wall facing portion that extends in the longitudinal direction and is capable of facing and contacting the upper surface of the bottom wall, and a bottom wall facing portion that extends in the longitudinal direction and is capable of contacting and facing the lower surface of the internal bottom wall. The inner bottom wall facing portion and the connecting portion extending in the longitudinal direction and connecting the bottom wall facing portion and the inner bottom wall facing portion in the vertical direction are integrally provided. It is possible to perform effective reinforcement of It is also effective that each of the inner bottom wall-facing portion and the bottom wall-facing portion consists of a single portion. For example, an extruded shape having a cross-sectional shape equivalent to that of H-beam steel, and a pair of upper and lower flange portions are arranged so as to form the inner bottom wall facing portion and the bottom wall facing portion. may be The bottom wall reinforcement may alternatively have a hollow cross-section surrounding the interior space.

The bottom wall reinforcing member is not limited to being joined to both the inner bottom wall and the bottom wall. The bottom wall reinforcing material is, for example, joined only to one of the inner bottom wall and the bottom wall, and only faces and contacts the other wall, or faces the other wall with a gap. However, if the gap is so small that it can be substantially in contact with the other wall, it functions as a reinforcing member that suppresses upward deformation of the bottom wall. Is possible.

The material of the bottom wall reinforcing material is not limited to the 7000 series aluminum alloy. The bottom wall reinforcing material may be made of an aluminum alloy other than the 7000 series aluminum alloy, for example.

In the present invention, the bottom wall reinforcing portion may be omitted. Alternatively, at least one of the bottom wall 12 and the inner bottom wall 30 may be reinforced by means other than the bottom wall reinforcing portion. For example, reinforcement may be performed by attaching another reinforcing plate to at least one of the upper surface and the lower surface of the bottom wall 12 . However, the bottom wall reinforcing portion interposed between the bottom wall 12 and the internal bottom wall 30 as described above can effectively reinforce the bottom wall 12 with a lightweight structure.

(D) Side sill connecting member In the present invention, the side sill connecting member can also be omitted as appropriate. For example, the container body according to the present invention may be connected to and supported by a vehicle body component (for example, front and rear cross members) other than the side sill.

When the battery accommodation unit according to the present invention includes the side sill connecting member, the specific structure of the side sill connecting member is not limited. The side sill connecting member may be, for example, a simple plate-shaped bracket. However, the side sill connecting member, like the side sill connecting member 70, is a reinforcing member that absorbs the impact load applied to the side sill by collapsing the side sill connecting member itself by having a plurality of closed cross sections arranged in the lateral direction of the vehicle body. It is possible to function as

In the structure shown in FIG. 4, instead of the lower outer wall 72, which is a lateral wall (a wall extending in the lateral direction of the vehicle body) of the side sill connecting member 70, at least a part of the vertical thick region of the upper outer wall 71, which is the same lateral wall, is The side sill connecting member 70 may be arranged so that the height position of the former and the height of the latter match to the extent that they overlap at least a part of the thick region in the vertical direction of the inner bottom wall 30 . Even with this arrangement, it is possible to transmit the laterally inward load applied to the side sill connecting member 70 from the side sill 2 to the inner bottom wall 30 from the upper outer wall 71 that is the lateral wall of the side sill connecting member 70 .

2 side sill 4 battery 10 container body 12 bottom wall 13 bottom wall peripheral edge boundary part 14 peripheral wall 20 lid 30 inner bottom wall 40 bottom wall reinforcement 41 right facing part (first facing part)
42 left facing part (second facing part)
44 Intermediate facing portion 45 Right connecting portion (first connecting portion)
46 left connecting part (second connecting part)
70 side sill connecting member 71 upper outer wall 72 lower outer wall 76 closed section Sb battery housing space Su lower protective space

Claims (6)

A battery housing unit for housing a battery under a vehicle body, comprising:
A container body made of a deep-drawn aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of an inner space of the container;
a lid attached to the container body so as to cover the inner space of the container at a position above the container body;
an internal bottom wall disposed inside the container body,
The inner surface of the bottom wall peripheral boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface,
The internal bottom wall is arranged at a position above the bottom wall, and a battery housing space for housing the battery is formed on the internal bottom wall ,
The battery housing unit, wherein the inner bottom wall is positioned above the bottom wall peripheral boundary . A battery housing unit for housing a battery under a vehicle body , comprising:
A container body made of a deep-drawn aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of an inner space of the container;
a lid attached to the container body so as to cover the inner space of the container at a position above the container body;
an internal bottom wall disposed inside the container body,
The inner surface of the bottom wall peripheral boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface,
The internal bottom wall is arranged at a position above the bottom wall, and a battery housing space for housing the battery is formed on the internal bottom wall,
The battery housing unit, wherein the container main body is made of a 5000 series aluminum alloy, and the inner bottom wall is made of a plate material made of a 6000 series aluminum alloy. A battery housing unit for housing a battery under a vehicle body , comprising:
A container body made of a deep-drawn aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of an inner space of the container;
a lid attached to the container body so as to cover the inner space of the container at a position above the container body;
an internal bottom wall disposed inside the container body,
The inner surface of the bottom wall peripheral boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface,
The internal bottom wall is arranged at a position above the bottom wall, and a battery housing space for housing the battery is formed on the internal bottom wall,
further comprising a bottom wall reinforcing portion interposed between the bottom wall and the internal bottom wall to suppress upward deformation of the bottom wall;
The bottom wall reinforcing portion includes a plurality of bottom wall reinforcing members each extending in a specific longitudinal direction along the bottom wall and the inner bottom wall, the plurality of bottom wall reinforcing members extending in a direction orthogonal to the longitudinal direction. are spaced apart by
Each of the plurality of bottom wall reinforcing members includes a bottom wall facing portion that extends in the longitudinal direction and is capable of contacting the upper surface of the bottom wall, and a bottom wall facing portion that extends in the longitudinal direction and faces the lower surface of the internal bottom wall. integrally comprising a contactable internal bottom wall facing portion and a connecting portion extending in the longitudinal direction and vertically connecting the bottom wall facing portion and the internal bottom wall facing portion;
One of the inner bottom wall facing portion and the bottom wall facing portion is configured by a first facing portion and a second facing portion respectively extending in the longitudinal direction while being spaced apart from each other in a direction perpendicular to the longitudinal direction. is an intermediate opposing portion extending in the longitudinal direction at a position between the first opposing portion and the second opposing portion, and the connecting portion vertically connects the intermediate opposing portion and the first opposing portion including a first connecting portion and a second connecting portion vertically connecting the intermediate facing portion and the second facing portion;
The battery housing unit, wherein the longitudinal direction of each of the plurality of bottom wall reinforcing members is parallel to the longitudinal direction of the vehicle body. A battery housing unit for housing a battery under a vehicle body , comprising:
A container body made of a deep-drawn aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of an inner space of the container;
a lid attached to the container body so as to cover the inner space of the container at a position above the container body;
an internal bottom wall disposed inside the container body,
The inner surface of the bottom wall peripheral boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface,
The internal bottom wall is arranged at a position above the bottom wall, and a battery housing space for housing the battery is formed on the internal bottom wall,
further comprising a bottom wall reinforcing portion interposed between the bottom wall and the internal bottom wall to suppress upward deformation of the bottom wall;
The bottom wall reinforcing portion includes a plurality of bottom wall reinforcing members each extending in a specific longitudinal direction along the bottom wall and the inner bottom wall, the plurality of bottom wall reinforcing members extending in a direction orthogonal to the longitudinal direction. are spaced apart by
The battery housing unit, wherein the bottom wall reinforcing member is made of an extruded profile made of a 7000 series aluminum alloy. A battery housing unit for housing a battery under a vehicle body , comprising:
A container body made of a deep-drawn aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of an inner space of the container;
a lid attached to the container body so as to cover the inner space of the container at a position above the container body;
an internal bottom wall disposed inside the container body,
The inner surface of the bottom wall peripheral boundary portion, which is the boundary portion between the peripheral edge of the bottom wall and the peripheral wall of the container body, is configured with an outwardly convex curved surface,
The internal bottom wall is arranged at a position above the bottom wall, and a battery housing space for housing the battery is formed on the internal bottom wall,
A side sill connecting member interposed between a side sill of the vehicle positioned outside the container body in the lateral direction of the vehicle body and the container body, the side sill connecting member connecting the container body with the side sill connecting member. connecting the container body to the side sill so as to be supported by the side sill ;
The side sill connecting member includes a lateral wall extending in the lateral direction of the vehicle body, and in the vertical direction of the vehicle body, at least a portion of the vertical thick region of the lateral wall corresponds to at least a vertical thick region of the inner bottom wall. A battery housing unit that partially overlaps . 6. The battery housing unit according to claim 5 , wherein the side sill connecting member is crushed by an impact load acting on the side sill inward in the left-right direction of the vehicle body, and is configured to absorb the impact load. A battery housing unit having a plurality of closed cross-sections aligned with each other.

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