CN114987179B

CN114987179B - Battery package for mounting on vehicle

Info

Publication number: CN114987179B
Application number: CN202210126932.5A
Authority: CN
Inventors: 立胁正章; 安井健; 川边悟
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2021-02-24
Filing date: 2022-02-10
Publication date: 2024-03-05
Anticipated expiration: 2042-02-10
Also published as: JP2022128961A; CN114987179A

Abstract

Provided is a battery package for mounting a vehicle, wherein deformation of a battery case can be suppressed to a small level and weight reduction can be achieved. The battery package for mounting a vehicle is provided with a battery case that houses a plurality of batteries. The battery case includes a case frame, a first stay, and a second stay. The housing frame is formed in a frame shape by a front frame, a rear frame, a right side frame, and a left side frame. The first stay is provided to the front frame and has a first stay contour portion that deforms upward and outward relative to the front frame. The second stay is provided to the rear frame and has a second stay contour portion that deforms toward the upper outer side with respect to the rear frame.

Description

Battery package for mounting on vehicle

The present application claims priority based on japanese patent application No. 2021-027453 filed 24, 2, 2021, the contents of which are incorporated herein by reference.

Technical Field

The present invention relates to a battery package for mounting on a vehicle.

Background

As a battery package for mounting on a vehicle, for example, a coupling portion is provided on a front wall portion of a battery case disposed under a floor panel of the vehicle and accommodating a plurality of batteries, and the coupling portion is coupled to a cowl cross member (dash cross member). According to this battery package, for example, in the case where the vehicle collides with the front surface, the collision load input from the vehicle front side is transmitted to the battery case. In this case, the collision load is transmitted to the cowl cross member via the joint portion between the front wall portion of the battery case and the cowl cross member. The transmitted collision load is dispersed in the vehicle width direction via the cowl cross member (see, for example, japanese patent application laid-open No. 2019-18732).

Disclosure of Invention

Here, the battery package for mounting a vehicle is generally a heavy weight. Therefore, in the battery package described in japanese patent application laid-open No. 2019-18732, for example, the strength and rigidity of the front wall portion of the battery case are high. Therefore, when a collision load is input from the vehicle front to the front wall portion of the battery case, the front wall portion may crush or deform due to the input collision load, and the battery case may be damaged (broken).

The invention provides a battery package for a vehicle, which can restrain deformation of a battery case to be small and can realize light weight.

(1) A battery pack for mounting on a vehicle according to an aspect of the present invention includes a battery case that is mounted under a floor panel of the vehicle and accommodates a plurality of storage batteries, the battery case including: a frame body formed in a frame shape by a front wall, a rear wall, and left and right side walls, wherein the storage battery is arranged inside; and a stay provided on at least one of the front wall and the rear wall and protruding in a direction away from at least one of the front wall and the rear wall in a vehicle body front-rear direction, the stay having a contour portion that deforms toward an outer side in a vertical direction with respect to at least one of the front wall and the rear wall.

According to the configuration of the above (1), the stay is provided on at least one of the front wall and the rear wall, and the stay has the contour portion. The contour portion is formed to be deformed (bent) outward in the up-down direction with respect to at least one of the front wall and the rear wall.

Therefore, for example, when a collision load is input to the stay due to a front surface collision or a rear surface collision, the stay can be bent and deformed outward with respect to at least one of the front wall and the rear wall by the input collision load. This can suppress the crushing residual of the stay to a small extent, and can crush and deform the stay satisfactorily. Further, the stay can be used to appropriately absorb impact energy caused by a collision. Therefore, the deformation of the battery case can be suppressed to be small. As a result, damage to the battery case can be suppressed to a small extent, and the battery can be protected from impact load.

In addition, for example, when a collision load is input to the stay, the deformation of the stay can suppress the collision load input (applied) to at least one of the front wall and the rear wall to be small. Accordingly, the front wall and/or the rear wall can be made lightweight without increasing the resistance (i.e., strength and rigidity) against the collision load to an unnecessary extent.

(2) In the aspect of (1) above, the stay may have: an upper wall that is displaced upward and outward from an upper surface of at least one of the front wall and the rear wall; and an inclined wall supported by at least one of the front wall and the rear wall and inclined at an ascending gradient away from at least one of the front wall and the rear wall in a front-rear direction of the vehicle body, wherein the contour portion forms a triangular closed cross section through a portion of at least one of the front wall and the rear wall, the upper wall, and the inclined wall.

According to the configuration of the above (2), the stay has the upper wall and the inclined wall, and the upper wall is displaced (biased) upward and outward from the upper surface of at least one of the front wall and the rear wall. Therefore, for example, when a collision load is input to the stay due to a front surface collision or a rear surface collision, the upper wall can be bent and deformed upward by the input collision load.

The inclined wall is inclined to be inclined at an ascending gradient as it is away from at least one of the front wall and the rear wall. Therefore, when a collision load is input to the stay, a part of the input collision load is converted into an upward load by the inclined wall. Thus, the stay can be bent and deformed upward. This can suppress the crushing residual of the stay to a small extent, and can crush and deform the stay satisfactorily. Therefore, the stay can be used to appropriately absorb the impact energy caused by the collision, and the deformation of the battery case can be suppressed to be small. As a result of the low level of suppression, damage to the battery case can be suppressed to a low level, and the battery can be protected from impact load.

Further, a triangular (also including substantially triangular) closed cross section is formed by at least one of the front wall and the rear wall, the upper wall, and the inclined wall. Thus, the strength and rigidity of the stay can be improved. Thus, for example, in a state where the upper wall is fixed to the vehicle body via the fixing bracket (fixing portion), the battery package as a weight can be supported by the stay (in particular, the inclined wall).

(3) In the embodiment (2), the upper wall may have a thickness larger than that of the inclined wall.

According to the configuration of the above-described aspect (3), by increasing the thickness of the upper wall compared with the inclined wall, for example, the surface rigidity (rigidity) against a vertical load input from above to the upper wall can be ensured. For example, in a state where the fixing bracket is attached to the upper surface and the fixing bracket is fixed to the vehicle body, the upper wall can be supported in a state of a hanger by the inclined wall. Thus, the vertical rigidity with respect to the stay can be ensured by the inclined wall.

In this way, by securing the surface rigidity of the upper wall and securing the rigidity in the up-down direction with respect to the stay by the inclined wall, the battery package as a weight can be supported by the stay.

(4) In the aspect of (3) above, the battery case may be disposed below a front floor panel among floors forming a floor panel portion of the vehicle, and the upper wall of the stay may be attached to a fixing bracket that hangs down from a rear floor panel adjacent to the front floor panel behind a vehicle body of the front floor panel.

According to the configuration of the above (4), the upper wall of the stay is attached to the fixing bracket hanging from the rear floor. Thus, for example, the stay is disposed at a position protruding rearward of the vehicle body from the rear end portion of the front floor. Thus, the battery case can be formed up to the rear end of the front floor, and the battery capacity of the battery package can be increased.

(5) In the embodiment (1), the stay may be configured as: the vehicle body structure comprises an upper wall, a lower wall, and a partition wall, wherein the upper wall and the lower wall form the profile part, the partition wall is arranged between the upper wall and the lower wall, one of the upper wall and the lower wall is formed longer than the other in the front-rear direction of the vehicle body, a bending part is arranged on one of the upper wall and the lower wall, the partition wall is formed on the upper wall and the lower wall in a crossing way, and the inside of the profile part is divided into a plurality of hollow chambers by the partition wall.

According to the configuration of the aspect (5), one of the upper wall and the lower wall is formed to have a longer total length in the front-rear direction of the vehicle body than the other, and a bent portion is formed at one of the upper wall and the lower wall. Therefore, for example, when a collision load is input to the stay, the stay can be bent and deformed outward of at least one of the front wall and the rear wall with the bent portion as a starting point. The partition wall is made to intersect (be orthogonal to) the upper wall and the lower wall. Thus, one of the bends starting from the bent portion can be transmitted to the other.

This makes it possible to suitably bend and deform the stay toward the outside of at least one of the front wall and the rear wall, and to suppress the crushing residue of the stay to a small extent. Further, the stay can be used to appropriately absorb impact energy caused by a collision. Therefore, the deformation of the battery case can be suppressed to be small, and the damage of the battery case can be suppressed to be small.

(6) In the embodiment (5), the partition wall may be provided in the bent portion.

According to the configuration of the above (6), the partition wall is provided at the bending portion, so that the collision load input to the stay can be concentrated at the bending portion. Accordingly, the bending deformation of the bending portion can be transmitted to the other of the upper wall and the lower wall via the partition wall while the bending deformation of the bending portion is performed starting from the bending portion. Accordingly, one of the bends starting from the bent portion can be rapidly transmitted to the other, and the stay can be suitably bent and deformed, so that the crushing residue of the stay can be suppressed to a small extent.

Further, by forming the stay by the upper wall, the lower wall, and the partition wall, for example, the stay can be formed by extrusion molding by an aluminum alloy, and the strength and rigidity balance between the up-down direction and the front-rear direction of the stay can be easily obtained.

(7) In the aspect (5) or (6), the stay may have a collision wall that is provided at a top end wall and receives a load caused by a collision, and the collision wall may be provided at a position close to one of the upper wall and the lower wall having the bent portion.

According to the configuration of the above (7), the collision wall is formed on the tip end wall of the stay, and the collision wall is provided at a position close to one of the upper wall and the lower wall having the bent portion. Accordingly, the collision load input to the stay can be received by the collision wall, and the collision load received by the collision wall can be concentrated on the bent portion promptly. This makes it possible to rapidly bend and deform the stay, and to suppress the crushing residue of the stay to a small extent.

(8) In addition to any one of the aspects (5) to (7), the stay may have a weakened portion located on one of the upper wall and the lower wall, the weakened portion having the bent portion.

According to the configuration of the aspect (8), the stay has the weakened portion, and the weakened portion is formed in one of the upper wall and the lower wall, which has the bent portion. In this way, the fragile portion is deformed by the collision load input to the stay, and thus the bending deformation of the stay can be increased.

(9) In the aspect of any one of (1) to (8), the stay may be set to have a length in the front-rear direction of the vehicle body longer than a height in the up-down direction of at least one of the front wall and the rear wall.

According to the configuration of the above (9), the length of the stay in the vehicle body longitudinal direction is set longer than the height of at least one of the front wall and the rear wall in the up-down direction. Thus, for example, in a state where the front floor is formed with a bulge portion that is raised from the front end portion of the front floor by a certain distance, the stay can be disposed at the front end portion of the front floor. In this way, the stay can be fixed to the front end portion of the front floor in a state in which the battery case is housed in the bulging portion of the front floor, and it is possible to achieve both the passenger space and the battery capacity.

(10) In the aspect of any one of (1) to (9), the battery case may be provided with a vertical frame that extends in the vehicle body front-rear direction and supports the battery, and the stay may be aligned on an extension line of the vertical frame.

According to the configuration of the above (10), the battery case is provided with the vertical frame, and the stays are aligned on the extension line of the vertical frame. Thus, the vertical frame can support the battery and also reinforce at least one of the front wall and the rear wall of the support stay. Thus, for example, the collision load input to the stay can be supported by the vertical frame, and the stay can be suitably bent and deformed by the collision load, so that the crushing residue of the stay can be suppressed to a small extent. Therefore, for example, a reinforcing member (additional member) for reinforcing at least one of the front wall and the rear wall is not required, and the battery case (i.e., the battery package) can be reduced in weight.

According to the aspect of the present invention, the stay is provided on at least one of the front wall and the rear wall, and the contour portion of the stay is formed so as to be deformed outward in the vertical direction with respect to at least one of the front wall and the rear wall. This can suppress deformation of the battery case to a small level, and further reduce the weight.

Drawings

Fig. 1 is a perspective view of a vehicle mounted with a battery package for mounting a vehicle according to an embodiment of the present invention, as viewed from the obliquely front side.

Fig. 2 is a bottom view showing a vehicle on which the battery package for mounting a vehicle according to the embodiment is mounted.

Fig. 3 is a cross-sectional view of a vehicle including the battery package for mounting a vehicle of fig. 1, taken along line III-III.

Fig. 4 is a perspective view showing a state in which a case cover is removed from the battery pack for mounting a vehicle according to an embodiment.

Fig. 5 is a perspective view showing a case main body of the battery package for mounting a vehicle of fig. 4.

Fig. 6 is an enlarged cross-sectional view of the first stay shown in section VI of fig. 3.

Fig. 7 is a perspective view showing a part of the first stay of fig. 6.

Fig. 8 is a perspective view showing a second stay of the battery package for mounting a vehicle according to an embodiment.

Fig. 9 is an enlarged cross-sectional view of the second stay shown in section IX of fig. 3.

Fig. 10 is a cross-sectional view illustrating an example of deforming the first stay of fig. 6 so as to crush toward the upper outer side under a front collision load.

Fig. 11 is a cross-sectional view illustrating an example of deforming the first stay of fig. 10 so as to crush into the upper outer space.

Fig. 12 is a cross-sectional view illustrating an example of deforming the second stay of fig. 9 so as to crush toward the upper outer side under a rear impact load.

Fig. 13 is a cross-sectional view illustrating an example of deforming the second stay of fig. 12 so as to crush into the upper outer space.

Detailed Description

A battery package for mounting a vehicle according to an embodiment of the present invention will be described below with reference to the drawings. In the drawing, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle. The application, type, etc. of the vehicle are not particularly limited, and an automobile will be described as an example of an embodiment. In addition, the vehicle has a substantially laterally symmetrical structure. Therefore, the same reference numerals are given to the left and right constituent members, and the description will be given below.

< vehicle >

As shown in fig. 1 to 3, the vehicle Ve includes a vehicle body (hereinafter, also referred to as a vehicle body 10) 10 and a vehicle-mounted battery package 20. Hereinafter, the battery package 20 for mounting a vehicle may be referred to simply as "battery package 20".

< vehicle body >

The vehicle body 10 includes a rocker unit 22, a floor 23, a floor tunnel 24, a front side frame unit 25, a rear frame unit 26, a floor cross member unit 27, and a floor vertical frame unit 28.

The rocker unit 22 includes a right rocker 31 and a left rocker 31. The right rocker 31 is a member having a closed cross section and high rigidity and forming a part of the framework of the vehicle body 10. The right rocker 31 is provided on the right outer side in the vehicle width direction, and extends in the vehicle body front-rear direction along the right outer side portion of the floor panel 23 in the vehicle width direction.

The left rocker 31 is a member having a closed cross section and high rigidity and forming a part of the framework of the vehicle body 10. The left rocker 31 is provided on the left outer side in the vehicle width direction, and extends in the vehicle body front-rear direction along the left outer side portion of the floor panel 23 in the vehicle width direction.

A floor panel 23 is provided between the left side rocker 31 and the right side rocker 31. The floor panel 23 forms a floor portion of the vehicle Ve, and includes a front floor panel 33 and a rear floor panel 34. The front floor 33 is a plate-like member having a substantially rectangular shape in plan view, and is provided between the dash lower member 35 and a fourth floor cross member 47 (described later) in the vehicle body front-rear direction. The front floor 33 forms, for example, a floor portion of a vehicle cabin (occupant space).

At the vehicle width direction center of the front floor 33, the floor tunnel 24 is provided extending in the vehicle body front-rear direction. The floor tunnel 24 bulges upward from the front floor 33.

The rear floor 34 is adjacent to the rear end portion 33a in the vehicle body rear direction of the front floor 33, and extends from the fourth floor cross 47 toward the vehicle body rear direction. The rear floor 34 forms, for example, a bottom plate portion of a luggage room.

The front side frame unit 25 includes a right front side frame 36 and a left front side frame 36. The right front side frame 36 and the left front side frame 36 are provided at positions forward of the vehicle body of the battery package 20.

The rear frame unit 26 includes a right rear frame 41 and a left rear frame 41. The right rear frame 41 and the left rear frame 41 are provided at positions rearward of the vehicle body of the battery package 20.

The floor cross member unit 27 is disposed between the right side rocker 31 and the left side rocker 31, and is joined along the upper surface of the front floor 33.

The floor cross member unit 27 includes a first floor cross member 44 on the right side, a first floor cross member 44 on the left side, a second floor cross member 45 on the right side, a second floor cross member 45 on the left side, a third floor cross member 46 on the right side, a third floor cross member 46 on the left side, and a fourth floor cross member 47.

The floor tunnel 24 intersects (in the embodiment, is orthogonal to) the first floor cross member 44 on the left and right sides, the second floor cross member 45 on the left and right sides, and the third floor cross member 46 on the left and right sides, and extends in the vehicle body front-rear direction.

The floor vertical frame unit 28 is provided with a plurality of first to fourth floor vertical frames 55 to 58 at intervals in the vehicle width direction on the floor 23. Specifically, the first floor vertical frame 55 and the second floor vertical frame 56 are provided at a distance from each other in the vehicle width direction on the right side of the floor tunnel 24 in the floor panel 23. The third floor vertical frame 57 and the fourth floor vertical frame 58 are provided at a distance in the vehicle width direction on the left side of the floor tunnel 24 in the floor panel 23. A battery package 20 is disposed under the floor panel 23 (particularly, the front floor panel 33).

< Battery Package >

As shown in fig. 3 to 5, the battery package 20 is mounted under the floor panel of the vehicle Ve (specifically, under the front floor panel 33). The battery package 20 includes a battery case (battery case) 71, a battery module 72, and a battery auxiliary 73.

(accumulator case)

The battery case 71 is provided at a position below the front floor 33 in the floor panel 23 forming the floor portion of the vehicle Ve, and houses the battery modules 72 (i.e., the plurality of batteries 75). The battery case 71 includes a case body 76 and a case cover 77.

The housing main body 76 includes a housing frame (housing) 81, a pair of first stays (stays) 82, a pair of second stays (stays) 83, a housing portion 84, a lower cross member 85, a first vertical frame (vertical frame) 86, a second vertical frame (vertical frame) 87, an upper cross member 88, and an upper cover 89.

The housing frame 81 includes a front frame (front wall) 92, a rear frame (rear wall) 93, a right side frame (right side wall) 94, a left side frame (left side wall) 95, a right inclined frame 96, and a left inclined frame 97.

The front frame 92 is disposed at a distance from the front edge of the battery module 72 in the vehicle body front direction, and extends in the vehicle width direction. The rear frame 93 is disposed at a distance from the rear edge of the battery module 72 in the vehicle body rear direction, and extends in the vehicle width direction.

The right side frame 94 is disposed at a right side in the vehicle width direction with respect to the right side of the battery module 72 at a distance from the right side, and extends from the right end portion of the front frame 92 toward the rear of the vehicle body. The right side frame 94 and the rear frame 93 are connected by a right inclined frame 96.

The left side frame 95 is disposed at a left side in the vehicle width direction with respect to the left side of the battery module 72 at a distance from the left side, and extends from the left end portion of the front frame 92 toward the rear of the vehicle body. The left side frame 95 and the rear frame 93 are connected by a left inclined frame 97.

The case frame 81 is formed into a substantially rectangular frame shape in plan view by the front frame 92, the rear frame 93, the left side frame 95, the right side frame 94, the right inclined frame 96, and the left inclined frame 97, and the battery module 72 is disposed therein. That is, the case frame 81 is formed to cover (surround) the outer periphery of the battery module 72 with a space therebetween.

As shown in fig. 2, 3, and 5, a pair of first stays 82 protrude from the front frame 92 so as to face the front of the vehicle body, and the pair of first stays 82 are provided at intervals in the vehicle width direction. The right first stay 82 of the pair of first stays 82 is attached to the right branch portion 38 from below, and the right branch portion 38 extends from the rear portion 36a of the right front side frame 36.

The left first stay 82 of the pair of first stays 82 is attached to the left branch portion 38 from below, and the left branch portion 38 extends from the rear portion 36a of the left front side frame 36.

That is, the front frame 92 is attached to the right branch portion 38 and the left branch portion 38 from below via the pair of first stays 82. The first stay 82 is described in detail later.

A pair of second stays 83 protrude rearward of the vehicle body in the rear frame 93, and the pair of second stays 83 are provided at intervals in the vehicle width direction. The right second stay 83 of the pair of second stays 83 is attached to the fourth floor cross member 47 from below via the right fixing bracket (fixing portion) 102 (see fig. 1).

The left second stay 83 of the pair of second stays 83 is attached to the fourth floor cross member 47 from below via a left fixing bracket (fixing portion) 102. That is, the rear frame 93 is attached to the fourth floor cross member 47 from below via the pair of second stays 83, the right side fixing bracket 102, and the left side fixing bracket 102 (see fig. 1). The second stay 83 is described in detail later.

The right side frame 94 is attached to the right side rocker 31 from below. The left side frame 95 is attached to the left side rocker 31 from below.

In this way, the housing frame 81 is attached to the bottom of the vehicle from below (i.e., the right branch portion 38, the left branch portion 38, the fourth floor cross member 47, the right rocker 31, and the left rocker 31).

As shown in fig. 5, the housing frame 81 is attached to the outer periphery of the housing portion 84. The case 84 is provided inside the case frame 81, and is mounted in a state surrounded by the case frame 81. A case bottom portion 105 of the case portion 84 (bottom surface of the battery package 20) is provided below the battery module 72 (see fig. 4). The housing 84 is provided with a lower cross member 85, a plurality of first vertical frames 86, and a plurality of second vertical frames 87.

The lower cross member 85 is disposed in the center of the housing 84 in the vehicle body front-rear direction, and extends in the vehicle width direction. A plurality of first vertical frames 86 are provided at positions in front of the vehicle body of the lower cross member 85 in the case bottom 105 at intervals in the vehicle width direction. A plurality of second vertical frames 87 are provided at positions in the case bottom 105 that are located rearward of the vehicle body of the lower cross member 85 at intervals in the vehicle width direction.

The plurality of first vertical frames 86 and the plurality of second vertical frames 87 are arranged on the same line with a spacing therebetween in the vehicle body front-rear direction. A lower cross member 85 is provided between the plurality of first vertical frames 86 and the plurality of second vertical frames 87.

In the embodiment, 1 lower cross member 85 is exemplified, but the number of lower cross members 85 can be appropriately selected. In the embodiment, 5 first vertical frames 86 are exemplified, and 5 second vertical frames 87 are exemplified, but the number of first vertical frames 86 and second vertical frames 87 can be appropriately selected.

The front end portion of the first vertical frame 86 is attached to the housing portion 84 by a first attachment bracket 107. The rear end portion of the first vertical frame 86 is attached to the lower cross member 85. That is, the first vertical frame 86 extends in the vehicle body front-rear direction.

The battery 75 is disposed longitudinally between the adjacent pair of first longitudinal frames 86 (see fig. 4), and the battery 75 disposed longitudinally is supported by the pair of first longitudinal frames 86.

The rear end portion of the second vertical frame 87 is attached to the housing portion 84 by a second attachment bracket 108. The front end portion of the second vertical frame 87 is attached to the lower cross member 85. That is, the second vertical frame 87 extends in the vehicle body front-rear direction.

The battery 75 is disposed longitudinally between the adjacent pair of second vertical frames 87, and the battery 75 disposed longitudinally is supported by the pair of second vertical frames 87.

The battery 75 is formed by overlapping a plurality of battery cells (not shown) in the longitudinal direction into a rectangular body having a long length. Hereinafter, the long battery 75 may be referred to as a long battery 75.

The longitudinal arrangement of the long battery 75 means that the battery 75 is arranged with its longitudinal direction oriented in the vehicle body front-rear direction (longitudinal direction).

In this way, the housing 84 is provided with the plurality of first vertical frames 86 and the plurality of second vertical frames 87 facing the vehicle longitudinal direction so as to be spaced apart in the vehicle longitudinal direction. A lower cross member 85 is provided between the plurality of first vertical frames 86 and the plurality of second vertical frames 87. In a front case region in front of the vehicle body of the lower cross member 85, a plurality of longitudinal batteries 75 are arranged longitudinally in the vehicle body front-rear direction along a plurality of first longitudinal frames 86. In a rear housing region in the vehicle body rear of the lower cross member 85, a plurality of vertical secondary batteries 75 are disposed longitudinally in the vehicle body front-rear direction along a plurality of second vertical frames 87. Accordingly, the plurality of vertical storage batteries 75 can be efficiently placed vertically, and a sufficient cruising distance can be ensured.

(Battery Module)

As shown in fig. 3 and 4, for example, the battery module 72 for driving is configured by a plurality of vertical batteries 75 disposed in the front case region of the lower cross member 85 and a plurality of vertical batteries 75 disposed in the rear case region of the lower cross member 85.

That is, in the battery module 72, the plurality of batteries 75 are supported by the plurality of first vertical frames 86 and the plurality of second vertical frames 87 in a state in which the longitudinal direction is oriented in the vehicle body front-rear direction.

In the embodiment, the example in which the plurality of batteries 75 on the front side and the plurality of batteries 75 on the rear side are arranged in a pair in the vehicle body front-rear direction has been described, but the present invention is not limited thereto. As another example, the plurality of front-side batteries 75 and the plurality of rear-side batteries 75 may be arranged in 3 or more rows in the vehicle body front-rear direction.

Further, an upper cross member 88 is disposed above the battery module 72, and the upper cross member 88 is disposed between the plurality of batteries 75 in the front case region and the plurality of batteries 75 in the rear case region, and above the lower cross member 85.

The upper cross member 88 is disposed above the lower cross member 85, and extends along the lower cross member 85 in the vehicle width direction. The upper cross member 88 is coupled to the upper end portions of the upper and lower coupling sleeves 112 by tightening the coupling bolts 113. The lower end portion of the upper and lower coupling sleeve 112 is coupled to the lower cross member 85. Thus, the upper cross member 88 is coupled to the lower cross member 85 via the fastening bolts 113 and the upper and lower coupling sleeves 112.

In this state, the upper cross member 88 and the battery 75 are attached to the plurality of first vertical frames 86 and the plurality of second vertical frames 87 by fastening the connecting bolts 114.

The front end portions 72a of the battery modules 72 are attached to the plurality of first vertical frames 86 by tightening the connecting bolts 115. The rear end portions 72b of the battery modules 72 are attached to the plurality of second vertical frames 87 by tightening the connecting bolts 116.

Thus, a plurality of vertical batteries 75 (i.e., battery modules 72) are fixed to the plurality of first vertical frames 86 and the plurality of second vertical frames 87.

(auxiliary machine for storage battery)

An upper cover 89 is provided above the plurality of batteries 75 and at the center in the vehicle width direction so as to extend in the vehicle body front-rear direction. A high-voltage wiring block, an ECU (control device, electronic Control Unit), and other battery auxiliary devices 73 are provided on the upper cover 89.

The high-voltage junction box is an auxiliary machine that supplies power of the driving battery module 72 to a driving motor (not shown), for example. The ECU is, for example, a battery management unit that controls discharging and charging between the driving battery module 72 and the driving motor.

In a state where the battery module 72 and the battery auxiliary 73 are accommodated in the case main body 76, the case cover 77 is attached to the case frame 81 from above. Thus, the battery package 20 is assembled and mounted under the floor of the vehicle Ve.

(first stay)

As shown in fig. 5 to 7, the first stay 82 projects away from the front frame 92 toward the vehicle body front direction. The first stay 82 has a first stay contour portion (contour portion) 121, a first barrier wall (barrier wall) 122, a second barrier wall (barrier wall) 123, and a first stay base 124.

The first stay base 124 has, for example, a vertical base 125 and a horizontal base 126, and is formed in an L-shape in cross section by the vertical base 125 and the horizontal base 126. The longitudinal base 125 of the first stay base 124 is joined to the front surface portion 92a of the front frame 92, and the horizontal base 126 is joined to the lower surface portion 92b of the front frame 92. Thereby, the first stay 82 is joined to the front frame 92.

The first stay profile portion 121 has a first stay base end wall 131, a first stay upper wall (the other of the upper wall, and the lower wall) 132, a first stay lower wall (the one of the lower wall, the upper wall, and the lower wall) 133, and a first stay top end wall (top end wall, front surface) 134.

The first stay base end wall 131 is formed by a portion of the longitudinal base 125 of the first stay base 124 between the first stay upper wall 132 and the first stay lower wall 133. That is, the first stay base end wall 131 is included in the longitudinal base 125 of the first stay base 124.

The first stay upper wall 132 horizontally protrudes toward the front of the vehicle body from, for example, a portion of the vertical base 125 near the upper end (i.e., the upper end of the first stay base end wall 131). The first stay upper wall 132 is formed in a rectangular shape in a plan view, for example.

The first stay lower wall 133 protrudes toward the front of the vehicle body from, for example, the lower end portion of the vertical base 125 (i.e., the lower end portion of the first stay base end wall 131). The first stay lower wall 133 is formed in a rectangular shape in a plan view, for example. The first stay lower wall 133 has, for example, a lower inclined wall portion 136 and a lower horizontal wall portion 137.

The lower inclined wall portion 136 is inclined toward the front Fang Chengshang of the vehicle body, for example, from the lower end portion of the first stay base 124 to the first partition wall 122. The lower horizontal wall portion 137 horizontally protrudes toward the front of the vehicle body from the tip end portion of the lower inclined wall portion 136 to the lower end portion of the top end wall 134 (specifically, a collision wall 145 described later).

The first stay lower wall 133 is formed longer than the first stay upper wall 132 in the overall length in the vehicle body front-rear direction by having the lower inclined wall portion 136. In addition, the lower horizontal wall portion 137 has a bent portion 138. The bending portion 138 is formed at a portion where the lower inclined wall portion 136 and the lower horizontal wall portion 137 intersect, and protrudes upward (i.e., the first stay upper wall 132) to be bent.

Further, first partition walls 122 are formed between first stay upper walls 132 and first stay lower walls 133 so as to intersect first stay upper walls 132 and first stay lower walls 133. Specifically, for example, the first partition wall 122 has an upper end portion disposed orthogonal to the first stay upper wall 132 and a lower end portion disposed intersecting the bent portion 138 of the first stay lower wall 133. That is, the first partition wall 122 is provided at the bending portion 138.

Further, a second partition 123 is provided between the first stay upper wall 132 and the first stay lower wall 133 and at the vehicle body rear of the first partition 122 so as to extend along the first partition 122. The second partition 123 is formed to intersect the first stay upper wall 132 and the first stay lower wall 133. Specifically, for example, the second partition 123 has an upper end portion disposed orthogonal to the first stay upper wall 132 and a lower end portion disposed intersecting the first stay lower wall 133.

A first stay distal end wall 134 is provided at the distal end portion of the first stay upper wall 132 and the distal end portion of the first stay lower wall 133. Thus, the first stay 82 forms the first stay profile 121 into a closed section through the first stay base end wall 131, the first stay upper wall 132, the first stay lower wall 133, and the first stay top end wall 134.

Further, the first stay 82 is formed by a first stay base 124, a first stay upper wall 132, a first stay lower wall 133, a first stay top end wall 134, a first partition wall 122, and a second partition wall 123. The first stay base 124 and the walls 132, 133, 134, 122, 123 are formed with a constant wall thickness in the vehicle width direction. Thus, for example, the first stay 82 can be formed by extrusion molding of an aluminum alloy, and the strength and rigidity balance between the up-down direction and the front-rear direction of the first stay 82 can be easily obtained.

In this way, in the first stay contour portion 121, for example, the total length of the first stay lower wall 133 is formed longer than the first stay upper wall 132 in the vehicle body front-rear direction, and the bent portion 138 is formed in the first stay lower wall 133. Accordingly, the first stay contour portion 121 is formed so as to deform outward in the upward direction of the front frame 92 by a load (hereinafter, also referred to as a front collision load) F1 input by a front surface collision (collision), for example. Hereinafter, the upper outer side of the front frame 92 may be referred to as a "first upper outer space 141".

Inside the first stay contour portion 121, a first partition wall 122 and a second partition wall 123 are provided. Thus, the interior of the first stay profile portion 121 is divided into a plurality of hollow chambers 142 by the first partition wall 122 and the second partition wall 123.

In addition, the first stay top end wall 134 has, for example, an impact wall 145 and an inclined wall 146. The collision wall 145 stands up from the tip end portion of the first stay lower wall 133 (i.e., the tip end portion of the lower horizontal wall portion 137) toward the upper direction Fang Shuzhi, for example. The inclined wall 146 is inclined toward the rear of the vehicle body from the upper end portion of the collision wall 145 to the tip end portion of the first stay upper wall 132, for example. Thus, for example, the front collision load F1 input by the front surface collision can be received by the collision wall 145. The collision wall 145 is disposed at a position close to the first stay lower wall 133.

The first stay lower wall 133 has a frangible portion (deformable portion) 148 between the collision wall 145 and the bent portion 138. The fragile portion 148 is formed by an opening such as a through hole through which the fastening bolt 151 can pass from below. The fragile portion 148 is not limited to being provided between the collision wall 145 and the bent portion 138, and may be provided in another place. The number and shape of the fragile portions 148 can be appropriately selected. The fragile portion 148 is not limited to the opening portion, and may be formed of another shape such as thinning the wall thickness.

As shown in fig. 3 and 6, the length L1 of the first stay 82 in the vehicle body front-rear direction is set longer than the height H1 of the front frame 92 in the up-down direction. The length L1 of the first stay 82 in the vehicle body front-rear direction is a distance in the vehicle body front-rear direction from the first stay base end wall 131 to the fastening bolt 151 (described later). Hereinafter, the length L1 of the first stay 82 in the vehicle body front-rear direction may be referred to as "first stay length L1".

By forming the first stay length L1 longer than the height H1 of the front frame 92, the first stay length L1 can be ensured to be sufficiently long.

Here, the front floor 33 has a bulge 33c that is formed to be higher than the front end 33b. Accordingly, by securing the first stay length L1 sufficiently long, the first stay 82 can be disposed at the front end portion 33b of the front floor panel 33 in a state in which the battery case 71 is housed in the bulge portion 33c of the front floor panel 33. In this way, in a state in which the battery case 71 is stored in the bulge portion 33c, the first stay 82 can be fixed to the front end portion 33b side of the front floor 33 (specifically, the right branch portion 38 and the left branch portion 38 shown in fig. 2) by tightening the connecting bolt 151.

Accordingly, both the securing of the passenger space (i.e., the vehicle cabin space) 154 and the securing of the battery capacity (i.e., the battery capacity of the battery package 20) of the battery module 72 housed in the battery case 71 can be achieved.

As shown in fig. 5 to 7, the first stay 82 is disposed on the vehicle body front side of the first and second vertical frames 86 and 87, for example, and is aligned (including substantially aligned) on the extension line 149 of the first and second vertical frames 86 and 87.

As a result, the first vertical frame 86 and the second vertical frame 87 support the plurality of batteries 75, and in particular, the first vertical frame 86 can serve as a reinforcement for the front frame 92 supporting the first stay 82.

As shown in fig. 2 and 6, the pair of first stays 82 are attached to the right branch portion 38 and the left branch portion 38 from below by tightening the connecting bolts 151. In this state, the first stay 82 is formed, for example, so as to receive the front collision load F1 input by the front surface collision by the collision wall 145, and can be appropriately crushed and deformed by the front collision load F1. The first stay 82 has strength and rigidity that can support the weight F2 of the battery package 20, for example.

In the embodiment, the first stay 82 is formed such that the total length of the first stay lower wall 133 is longer than the first stay upper wall 132 in the vehicle body front-rear direction, and the first stay lower wall 133 is formed with the bent portion 138 and the frangible portion 148. As another example, the first stay 82 may be formed to be vertically symmetrical. Specifically, for example, the total length of the first stay upper wall 132 may be longer than the first stay lower wall 133 in the vehicle body front-rear direction, and the first stay upper wall 132 may be formed with a bent portion 138 and a weakened portion 148.

(second stay)

As shown in fig. 5, 8, and 9, the second stay 83 protrudes away from the rear frame 93 toward the vehicle body rear direction. The second stay 83 has a second stay profile (contour) 155 and a second stay base 156.

The second stay base 156 has a longitudinal base 157 and a horizontal base 158. The vertical base 157 is joined to the rear surface portion 93a of the rear frame 93, and the upper end portion 157a protrudes upward from the upper surface portion (upper surface) 93b of the rear frame 93. A horizontal base 158 protrudes from a portion 157b of the vertical base 157 near the upper end 157a toward the front of the vehicle body along the upper surface 93b of the rear frame 93. The horizontal base 158 is coupled to the upper surface portion 93b of the rear frame 93, for example.

The vertical base 157 is joined to the rear surface portion 93a of the rear frame 93, and the horizontal base 158 is joined to the upper surface portion 93b of the rear frame 93, whereby the second stay 83 is joined to the rear frame 93.

The second stay profile 155 includes, for example, a second stay base end wall (at least one of the front wall and the rear wall) 161, a second stay upper wall (upper wall) 162, a second stay inclined wall (inclined wall) 163, and a second stay distal end wall 164.

The second stay base end wall 161 is formed by a portion of the longitudinal base 157 of the second stay base 156 between the second stay upper wall 162 and the second stay inclined wall 163. That is, the second stay base end wall 161 is included in the longitudinal base 157 of the second stay base 156.

The second stay upper wall 162 horizontally protrudes from the upper end 157a of the vertical base 157 (i.e., the upper end of the second stay base end wall 161) toward the front of the vehicle body. Here, the second stay upper wall 162 and the upper end 157a of the vertical base 157 are formed in an L shape. Thereby, the second stay upper wall 162 is displaced (offset) by a height H2 toward the outside above the upper surface portion 93b of the rear frame 93.

The second stay upper wall 162 is formed in a rectangular shape in a plan view, and has a thickness (plate thickness) T greater than that of the second stay inclined wall 163.

The second stay inclined wall 163 is supported on the upper surface portion 93b of the rear frame 93 via the lower end portion of the second stay base end wall 161 (i.e., the portion 157d of the lower end portion 157c of the vertical base 157). The second stay inclined wall 163 is inclined at an ascending slope as it is away from the rear surface portion 93a of the rear frame 93 (specifically, the longitudinal base 157) from the lower end portion of the second stay base end wall 161 to the lower end portion of the second stay tip end wall 164.

The second stay inclined wall 163 is formed in a rectangular shape in plan view, and has a fragile portion (easy-to-deform portion) 167. The fragile portion 167 is formed by an opening such as a through hole through which the fastening bolt 168 can pass from below.

The second stay distal end wall 164 is provided, for example, at the distal end portion of the second stay upper wall 162 and the distal end portion of the second stay inclined wall 163, and is disposed along the longitudinal base 125 (i.e., the second stay base end wall 161). Thus, the second stay 83 forms the second stay profile 155 into a triangular (including substantially triangular) closed cross section through the second stay base end wall 161, the second stay upper wall 162, the second stay inclined wall 163, and the second stay top end wall 164. Thus, the strength and rigidity of the second stay 83 can be improved.

The second stay 83 is formed of the second stay base 156, the second stay upper wall 162, the second stay inclined wall 163, and the second stay top end wall 164. The second stay base 156 and the walls 162, 163, 164 are formed with a constant wall thickness in the vehicle width direction. Thus, for example, the second stay 83 can be formed by extrusion molding of an aluminum alloy, and the strength and rigidity balance of the second stay 83 in the up-down direction and the front-back direction can be easily obtained.

In this way, in the second stay profile portion 155, for example, the second stay upper wall 162 is displaced (offset) by the height H2 toward the upper outer side of the upper surface portion 93b of the rear frame 93, and the second stay inclined wall 163 is inclined at an upward gradient up to the lower end portion of the second stay top end wall 164. Accordingly, the second stay contour portion 155 is formed so as to deform outward in the upward direction of the upper surface portion 93b of the rear frame 93 by a load (hereinafter, also referred to as a rear collision load) F3 input by a rear surface collision (collision), for example. Hereinafter, the upper outer side of the upper surface portion 93b of the rear frame 93 may be referred to as "second upper outer space 166".

The second stay 83 is disposed, for example, on the vehicle body rear side of the first and second vertical frames 86, 87, and is aligned (including substantially aligned) on the extension line 149 of the first and second vertical frames 86, 87.

As shown in fig. 2, 3, and 9, the second stay upper walls 162 of the pair of second stays 83 are fixed to the lower end 102a of the right fixing bracket 102 and the lower end 102a of the left fixing bracket 102 by fastening the connecting bolts 168.

The right fixing bracket 102 is attached to the fourth floor cross member 47 from below through the rear floor 34 at its upper end 102b (see fig. 1). The right-hand fixing bracket 102 hangs down at the fourth floor cross member 47 via the rear floor 34. That is, the second stay upper wall 162 of the right second stay 83 of the pair of second stays 83 is attached to the lower end 102a of the right fixing bracket 102 hanging down from the fourth floor cross member 47 via the rear floor 34.

The left fixing bracket 102 is attached to the fourth floor cross member 47 from below through the rear floor 34 at its upper end 102b (see also fig. 1). The left side fixing bracket 102 hangs down from the fourth floor cross member 47 via the rear floor 34. That is, the second stay upper wall 162 of the left second stay 83 of the pair of second stays 83 is attached to the lower end 102a of the left fixing bracket 102 hanging down from the fourth floor cross member 47 via the rear floor 34.

In this state, the second stay 83 is formed such that, for example, the rear collision load F3 input by the rear surface collision is received by the second stay distal end wall 164, and the second stay can be deformed by being appropriately crushed by the rear collision load F3. The second stay 83 has strength and rigidity that can support the weight F2 of the battery package 20, for example.

In the embodiment, the second stay 83 is described as an example in which the second stay upper wall 162 is displaced upward by the height H2 from the upper surface portion 93b of the rear frame 93, and the second stay inclined wall 163 is inclined at an upward gradient to the second stay distal end wall 164, but the present invention is not limited thereto. As another example, the second stay 83 may be formed to be vertically symmetrical, for example. Specifically, for example, the second stay lower wall may be displaced (offset) downward from the lower surface portion of the rear frame 93, and the second stay inclined wall may be inclined at a downward slope to reach the second stay top end wall.

In the embodiment, the second stay upper wall 162 and the second stay inclined wall 163 are provided in the second stay base end wall 161, but the present invention is not limited thereto. As another example, for example, the second stay upper wall 162 and the second stay inclined wall 163 may be provided on the rear surface portion 93a (at least one portion of the front wall and the rear wall) of the rear frame 93.

As described above, according to the battery package 20 for mounting a vehicle of the embodiment, the following operational effects can be obtained.

First, the first stay 82 is explained.

As shown in fig. 6, 10, and 11, the front frame 92 is provided with a first stay 82, and the first stay 82 is provided with a first stay contour portion 121. The first stay contour portion 121 is formed to be deformed upward of the front frame 92, for example, by the front collision load F1. Thus, for example, when the front collision load F1 is input to the first stay 82 due to the front surface collision, the first stay 82 can be deformed to bend toward the upper outer side of the front frame 92 (i.e., the first upper outer space 141) due to the input front collision load F1.

Thus, for example, when the front collision load F1 is input, the first stay 82 can be satisfactorily crushed and deformed with the crush residue of the first stay 82 suppressed to a small extent. Further, the first stay 82 can be utilized to appropriately absorb the impact energy caused by the front surface collision. Therefore, the deformation of the battery case 71 can be suppressed to be small. As a result, the plurality of batteries 75 stored in the battery case 71 can be protected from the forward collision load F1 while suppressing damage to the battery case 71 to a small extent.

Further, for example, when the front collision load F1 is input to the first stay 82, the load input (applied) to the front frame 92 can be suppressed to be small by the deformation of the first stay 82. As a result, the front frame 92 does not need to have an unnecessarily high level of endurance (i.e., strength and rigidity) against the front collision load F1, and the battery case 71 (i.e., the battery package 20) can be reduced in weight.

The total length of the first stay lower wall 133 is formed longer than the first stay upper wall 132 in the vehicle body front-rear direction, and a bent portion 138 is formed in the first stay lower wall 133. Thus, for example, when the front collision load F1 is input to the first stay 82, the front collision load F1 can be concentrated on the bending portion 138. Accordingly, the first stay 82 can be bent and deformed toward the first upper outer space 141 on the upper outer side of the front frame 92 with the bent portion 138 as a starting point.

The first barrier ribs 122 and the second barrier ribs 123 are orthogonal to the first stay upper walls 132, and the first barrier ribs 122 and the second barrier ribs 123 intersect with the first stay lower walls 133. Accordingly, the bending of the first stay lower wall 133 starting from the bending portion 138 can be transmitted to the first stay upper wall 132.

Accordingly, the first stay 82 can be appropriately bent and deformed toward the first upper outer space 141 on the upper outer side of the front frame 92, and the crushing residue of the first stay 82 can be suppressed to a small extent. Further, the first stay 82 can be used to appropriately absorb impact energy caused by a collision. Therefore, the deformation of the battery case 71 can be suppressed to be small, and the damage of the battery case 71 can be suppressed to be small.

The first partition 122 is provided at the bending portion 138. Accordingly, for example, by concentrating the forward collision load F1 at the bending portion 138 and bending the first stay lower wall 133 with the bending portion 138 as a starting point, the bending deformation of the bending portion 138 can be transmitted to the first stay upper wall 132 via the first bulkhead 122. Accordingly, the bending of the first stay lower wall 133 starting from the bending portion 138 can be quickly transmitted to the first stay upper wall 132, and the first stay 82 can be suitably bent and deformed, so that the crushing residue of the first stay 82 can be suppressed to a small extent.

In addition, a collision wall 145 is formed on the first stay distal end wall 134 of the first stay 82. The collision wall 145 is disposed in a position close to the first stay having the bending portion 138. Accordingly, the forward collision load F1 input to the first stay 82 can be received by the collision wall 145, and the forward collision load F1 received by the collision wall 145 can be concentrated on the bent portion 138 quickly. This makes it possible to rapidly bend and deform the first stay 82, and to suppress the crushing residue of the first stay 82 to a small extent.

Further, a frangible portion 148 (see fig. 7) is formed in the first stay lower wall 133 in which the bent portion 138 is formed. Accordingly, the fragile portion 148 is deformed by the forward collision load F1 input to the first stay 82, so that the bending deformation of the first stay 82 can be increased.

As shown in fig. 5, 10, and 11, the first stay 82 is aligned with the extension line 149 of the first vertical frame 86 and the second vertical frame 87. Thus, the first and second vertical frames 86 and 87 support the plurality of batteries 75, and in particular, the first vertical frame 86 can serve as a reinforcement for the front frame 92 supporting the first stay 82. Thus, for example, the front collision load F1 input to the first stay 82 can be supported by the first vertical frame 86 and the second vertical frame 87 (in particular, the first vertical frame 86).

Therefore, the first stay 82 can be appropriately bent and deformed under the front collision load F1, and the crush residue of the first stay 82 can be suppressed to be small. As a result, for example, a reinforcing member (additional member) for reinforcing the front frame 92 is not required, and the battery case 71 (i.e., the battery package 20) can be reduced in weight.

Next, the second stay 83 is described.

As shown in fig. 9, 12, and 13, the rear frame 93 is provided with a second stay 83, and the second stay 83 is provided with a second stay contour 155. The second stay contour portion 155 is formed to deform upward of the rear frame 93, for example, by a rear surface load F3 input by a rear surface collision. Thus, for example, when the rear collision load F3 is input to the second stay 83 due to the rear surface collision, the second stay 83 can be deformed by bending the input rear collision load F3 toward the second upper outer space 166 on the upper outer side with respect to the rear frame 93.

Thus, for example, when the rear impact load F3 is input to the second stay 83, the second stay 83 can be satisfactorily crushed and deformed by suppressing the crushing residual of the second stay 83 to a small extent. Further, the second stay 83 can be used to appropriately absorb the impact energy caused by the rear surface collision. Therefore, the deformation of the battery case 71 can be suppressed to be small. As a result, the plurality of batteries 75 (see fig. 3) housed in the battery case 71 can be protected from the rear collision load F3 while suppressing damage to the battery case 71 (see fig. 3) to a small extent.

Further, for example, when the rear collision load F3 is input to the second stay 83, the load input (applied) to the rear frame 93 can be suppressed to be small by the deformation of the second stay 83. As a result, the rear frame 93 does not need to have an increased tolerance (i.e., strength and rigidity) against the rear collision load F3 to an unnecessary extent, and the battery case 71 (i.e., the battery package 20) can be reduced in weight.

Further, the second stay upper wall 162 of the second stay 83 is displaced (biased) upward and outward from the upper surface portion 93b of the rear frame 93. Therefore, for example, when the rear collision load F3 is input to the second stay 83 due to a rear-surface collision, the second stay upper wall 162 can be bent and deformed upward by the input rear collision load F3.

The second stay inclined wall 163 is inclined at an upward gradient as it moves away from the rear frame 93 toward the rear of the vehicle body. Therefore, when the rear impact load F3 is input to the second stay 83, a part of the input rear impact load F3 can be converted into an upward load F4 by the second stay inclined wall 163. Accordingly, the second stay 83 can be bent and deformed upward by the load F4. Further, the second stay inclined wall 163 is formed with a weakened portion 167 (see fig. 9). This can suppress the crushing residual of the second stay 83 to a small extent, and can satisfactorily crush and deform the second stay 83.

Therefore, the second stay 83 can appropriately absorb the impact energy caused by the rear-surface collision, and the deformation of the battery case 71 (see fig. 3) can be suppressed to be small. As a result, the battery case 71 is kept less damaged, and the battery 75 (see fig. 3) can be protected from the rear collision load F3.

As shown in fig. 2, 3, and 9, the second stay profile 155 is formed into a substantially triangular (including triangular) closed cross section by the second stay base end wall 161, the second stay upper wall 162, the second stay inclined wall 163, and the second stay top end wall 164. Thus, the strength and rigidity of the second stay 83 are improved.

Here, for example, the second stay upper walls 162 of the pair of second stays 83 are fixed to the rear floor 34 (specifically, the fourth floor cross member 47 (see fig. 1), that is, the vehicle body 10) via the right side fixing bracket 102 and the left side fixing bracket 102. In this state, the battery package 20 as a heavy object can be supported by the pair of second stays 83 (in particular, the second stay inclined walls 163) having improved strength and rigidity.

Further, the thickness T of the second stay upper wall 162 is increased compared to the second stay inclined wall 163. As a result, for example, the surface rigidity (rigidity) against the vertical load F5 can be ensured, and the vertical load F5 is a load input from above to the second stay upper wall 162 due to the dead weight F2 of the battery package 20.

Further, for example, a fixing bracket 102 is attached to the second stay upper wall 162, and the fixing bracket 102 is fixed to the rear floor 34 (specifically, the fourth floor cross member 47 (see fig. 1)). In this state, the second stay upper wall 162 can be supported in a hanging state by the second stay inclined wall 163. Accordingly, the rigidity of the second stay 83 in the up-down direction can be ensured by the second stay inclined wall 163.

In this way, the surface rigidity of the second stay upper wall 162 can be ensured, and the rigidity in the up-down direction of the second stay 83 can be ensured by the second stay inclined wall 163, whereby the battery package 20 as a weight can be supported by the second stay 83.

The second stay upper wall 162 is attached to the fixing bracket 102 hanging from the rear floor 34 (specifically, the fourth floor cross member 47 (see fig. 1)). Thus, for example, the second stay 83 can be disposed at a position protruding rearward of the vehicle body from the rear end portion 33a of the front floor 33. As a result, the battery case 71 can be formed so as to be larger than the rear end 33a of the front floor 33, and the battery capacity of the battery module 72 (that is, the battery capacity of the battery package 20) housed in the battery case 71 can be increased.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

For example, in the above embodiment, the example in which the pair of first stays 82 is provided in the front frame 92 and the pair of second stays 83 is provided in the rear frame 93 has been described, but the present invention is not limited thereto. As another example, for example, a stay may be provided on only one of the front frame 92 and the rear frame 93.

The number of the first stays 82 provided in the front frame 92 and the number of the second stays 83 provided in the rear frame 93 may be appropriately selected.

In the above embodiment, the example in which the first stay 82 is provided to the front frame 92 and the second stay 83 is provided to the rear frame 93 has been described, but the present invention is not limited thereto. As another example, for example, the first stay 82 may be provided to the rear frame 93, and the second stay 83 may be provided to the front frame 92.

In addition, the components in the above-described embodiments may be appropriately replaced with known components within a range not departing from the gist of the present invention, and the above-described modifications may be appropriately combined.

Claims

1. A battery package for mounting on a vehicle, characterized in that,

The battery package for mounting a vehicle includes a battery case mounted under a floor of the vehicle and accommodating a plurality of storage batteries,

the battery case is provided with:

a frame body formed in a frame shape by a front wall, a rear wall, and left and right side walls, wherein the storage battery is arranged inside; and

a stay provided on at least one of the front wall and the rear wall and protruding in a direction away from at least one of the front wall and the rear wall in a vehicle body front-rear direction,

the stay has a contour portion which is deformed outward in the vertical direction with respect to at least one of the front wall and the rear wall,

the stay is constructed as follows:

has an upper wall and a lower wall forming the contour portion, and a partition wall provided between the upper wall and the lower wall,

one of the upper wall and the lower wall is formed to have a longer total length than the other in the front-rear direction of the vehicle body, and has a bent portion on one side,

the partition walls are formed on the upper wall and the lower wall in a crossing manner, the interior of the contour part is divided into a plurality of hollow chambers by the partition walls,

the partition wall is arranged at the bending part.

2. A battery package for mounting on a vehicle, characterized in that,

the battery case is provided with:

the stay is constructed as follows:

the stay has a collision wall which is provided to the tip end wall and which receives a load caused by a collision,

The collision wall is provided at a position close to one of the upper wall and the lower wall having the bent portion.

3. A battery package for mounting on a vehicle, characterized in that,

the battery case is provided with:

the stay is constructed as follows:

The stay has a fragile portion located on one of the upper wall and the lower wall having the bent portion.

4. The battery package for mounting a vehicle according to any one of claim 1 to 3, wherein,

the stay has:

an upper wall that is displaced upward and outward from an upper surface of at least one of the front wall and the rear wall; and

an inclined wall supported by at least one of the front wall and the rear wall and inclined at an upward gradient away from at least one of the front wall and the rear wall in the front-rear direction of the vehicle body,

the contour portion forms a triangular closed cross section through a portion of at least one of the front wall and the rear wall, the upper wall, and the inclined wall.

5. The battery package according to claim 4, wherein,

the upper wall has an increased thickness as compared to the inclined wall.

6. The battery package according to claim 5, wherein,

the battery case is disposed below a front floor panel among floor panels forming a floor panel portion of the vehicle,

the upper wall of the stay is attached to a fixing bracket that hangs down from a rear floor adjacent to the front floor behind the vehicle body of the front floor.

7. The battery package for mounting a vehicle according to any one of claim 1 to 3, wherein,

the stay is set to have a length in the front-rear direction of the vehicle body longer than a height in the up-down direction of at least one of the front wall and the rear wall.

8. The battery package for mounting a vehicle according to any one of claim 1 to 3, wherein,

the battery case is provided with a vertical frame extending in the front-rear direction of the vehicle body and supporting the battery,

the stays are aligned on the extension lines of the longitudinal frames.