JP2015000593A - Support structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure for a vehicle, which has high support strength for loading the vehicle with a heavy load such as a battery module, which is effective for achievement of space saving, and which is excellent in vehicle collision safety.SOLUTION: In a support structure for loading a vehicle with a heavy load such as a battery module, a loading part is formed from right and left side frames for supporting a side part or an end of the heavy load, and a floor panel configured by coupling the side frames together. A cross panel, which is fitted between both longitudinal end surfaces of a part for coupling the side frames and the floor panel together, is provided.

Description

  The present invention relates to a support structure used to mount a relatively heavy object such as a battery module or an assembled battery on a vehicle.

In a vehicle using a battery as a drive source, such as an electric vehicle and a hybrid vehicle, it is necessary to efficiently mount these heavy objects.
In recent years, the number of batteries such as battery modules and assembled batteries has been increased in order to meet the required extended travel distance, and it is important to further reduce the mounting space and ensure safety in the event of a vehicle collision.

Patent Document 1 shows an example in which the battery modules are stacked in two stages in FIGS. 14 and 15 of the same publication. The first battery module is bolted, the collar is inserted into the color guide, and the collar is formed by the lower lid protrusion and the upper lid depression. The second-stage battery module is fixed by inserting a long bolt into the round hole of the collar.
In such a color guide and a structure using a collar, the battery module mounting space is reduced by the amount of the color guide.
In addition, the number of assembling steps is large and the assembling work is complicated.
Patent Document 2 discloses a battery storage device in which batteries are stacked while being offset.
However, a space for offsetting is required, and it is necessary to secure the strength of the battery itself that can be offset.

Japanese Patent No. 4783137 JP 2000-255276 A

  An object of the present invention is to provide a vehicle support structure that has high support strength for mounting heavy objects such as a battery module on a vehicle, is effective in saving space, and has excellent vehicle collision safety.

A support structure according to the present invention is a support structure for mounting a heavy object such as a battery module on a vehicle, wherein the mounting part includes left and right side frames that support the side or end of the heavy object, and The cross panel is formed by a floor panel to which side frames are connected, and is fitted between both end face portions of the connecting portion between the side frame and the floor panel in the front-rear direction.
Here, the expression “battery module” or the like means that the object of heavy objects is not limited to the battery module.
Secondary batteries that can be charged and discharged are used as driving power sources for electric vehicles and hybrid vehicles, and recently, fuel cells and the like have been studied.
Secondary batteries include a battery module type in which a plurality of single cell batteries are stacked such as a nickel-hydrogen battery, and an assembled battery type in which a plurality of cylindrical single batteries such as lithium ion batteries are connected.
In this specification, the heavy article includes all types of batteries that are currently used and batteries that will be developed in the future.
Further, in the present specification, the left-right direction refers to the positional relationship between the side frames facing each other for convenience, and the frame extending direction of each side frame is expressed as the front-rear direction.
Therefore, the left-right direction of the support structure is not directly related to the left-right front-rear direction for fixing the support structure to the vehicle.
In the present invention, the side frame refers to a frame body for supporting the side portion or the end portion of the weight portion mounted on the mounting portion from the lateral direction.
Battery modules may be placed in one stage. For example, when one or more battery modules are placed side by side on the first stage, and the second and subsequent battery modules and control devices are stacked on top of each other. This means that the side frames support these stacked heavy objects from the side.

In the present invention, the side frame has a connecting portion projecting inward, the connecting portion has a connecting portion with a floor panel, and the left and right end portions of the cross panel are in contact with the inside of the side frame. You may be allowed to.
If it does in this way, it will act in the direction which suppresses falling of a side frame at the end of a cross panel.

In the present invention, the side frame may have a flange portion protruding inward, and the lower surface of the end portion of the cross panel may be placed on the flange portion.
In this way, not only the end of the cross panel is in contact with the inside of the side frame, but also the end of the cross panel is supported from the bottom by the flange, which further improves the falling strength of the side frame and the load. Is supported by transmission to the side frames on both sides.

In the present invention, the side frame may have a plurality of hollow portions in the vertical direction.
When the side frame has a hollow cross-sectional shape as described above, the rigidity of the side frame is improved.

In the present invention, one or both of the floor panel and the cross panel may have a hollow portion.
If it does in this way, while being able to aim at the rigidity improvement with respect to the load of the perpendicular direction of the mounting part of a heavy article, it becomes possible to provide the cold wind supply means for cooling a battery module etc. via this hollow part.

In the support structure according to the present invention, since the cross panel is fitted so as to support the connecting portion between the left and right side frames and the floor panel from both end portions, the connecting portion between the side frame and the floor panel on both sides is a cross panel. Can be integrated.
As a result, a heavy load is transmitted to the side frame, and finally, the load is transmitted to the vehicle body via a fixing portion that fixes the side frame to the vehicle, thereby reducing the weight of the support structure. be able to.
In addition, when the vehicle collides front and rear or when it collides left and right, the collision load is distributed to each panel body forming the support structure, and the protection effect of the battery module or the like is high.

(A) shows a perspective view of a support structure according to the present invention, (b) shows a sectional end view taken along line AA, and (c) shows a sectional end view taken along line BB. (A) shows the example of a connection structure of a side frame and a floor panel, (b) shows the example of a structure of a cross panel, (c) shows the example of an assembly. (A) shows the second embodiment of the side frame and floor panel, (b) shows the second embodiment of the cross panel, and (c) shows the assembled state. A third embodiment is shown.

Although the example of the support structure 10 which concerns on this invention is demonstrated based on drawing below, this invention is not limited to this.
A structural example will be described with reference to FIG. 1 with reference to an assembly example of the structure shown in FIG.
The embodiment shown in FIG. 1 is an example in which the support structure 10 is fixed to the vehicle body along the longitudinal direction of the vehicle so that the front direction is FR, the upper direction is UPR, and the left side is LH in FIG. To do.
The support structure 10 is formed by connecting the inner sides of the left and right side frames 11 and 12 with a floor panel 13 and fitting the cross panel 20 so as to wrap the end portions in the front-rear direction of the connection portion from below. The side frames 11 and 12, the floor panel 13 and the cross panel 20 are integrated.
Hereinafter, a specific structural example will be described.
As shown in FIG. 2 (a), the right side frame 11 has a connecting portion 11b projecting inward from the inner wall from the lower portion of the column portion 11A having a plurality of hollow portions 11a in the vertical direction. The connecting portion 11b also has a hollow cross-sectional shape having a hollow portion 11c, and has a connecting recess 11d at the inner end.
Moreover, it has the flange part 11e which protruded toward the inner side from the lower end part of the side frame 11.
The left side frame 12 has a continuous portion 12b that protrudes inward from the inner wall from the lower portion of the column portion 12A having a plurality of hollow portions 12a in the vertical direction, and this continuous portion 12b also has a hollow portion 12c. It has a hollow cross-sectional shape and has a connecting projection 12d at the inner end.
The left and right side frames 12 and 11 are connected by floor panels 13 with continuous portions 12b and 11b protruding inward.
The number of floor panels 13 is not limited as long as it is one or more, and in this embodiment, three floor members 12A, 12B, and 13C are connected in the left-right direction.
Each floor member has a convex portion 14a at one end in the left-right direction and a concave portion 14b at the other end, and has a structure example in which they are engaged with each other.
In the present embodiment, all of the floor members 13A, 13B, and 13C constituting the side frames 11 and 12 and the floor panel 13 are made of an extruded aluminum alloy.

  The cross panel 20 includes a side wall portion 22 having a side extending upward from an end portion in the front-rear direction of the base portion 20A having a plurality of hollow portions 21 in the front-rear and lateral directions, and an upper side portion bent inward from the upper end of the side wall portion 22. 22a is formed.

The length in the front-rear direction of the connecting portions 11b, 12b of the side frames 11, 12 and the length in the front-rear direction of the floor members 13A, 13B, 13C are the width dimensions inside the side wall portions 22 in the front-rear direction of the cross panel 20. It is almost the same.
Further, the vertical thickness of the connecting portions 11b and 12b of the side frames 11 and 12 and the vertical thickness of the floor members 13A, 13B and 13C are determined by the upper surface of the base portion 20A of the cross panel 20 and the lower surface of the upper side portion 22a. It is almost the same as the depth between.
As shown in FIG. 2C, among the left and right side frames, for example, the floor members 13A, 13B, and 13C are connected to the connecting portion 11b of one side frame 11 in order to connect the concave and convex portions sequentially. On the other hand, it is inserted between the base portion 20A of the cross panel 20 and the upper side portion 22a, and the connecting portion 12b of the other side frame 12 is inserted and connected.
Thereby, the end portions 23 on both sides of the cross panel 20 are in contact with the inner side 11f of the side frame 11 and the inner side 12f of the side frame 12, respectively, and the lower surface of the end portion 23 is the flange portions 11e, 12e of the side frames 11, 12. It will be in the state mounted on the upper surface.

In the embodiment shown in FIGS. 1 and 2, the front side (front side) side wall portion 23 of the cross panel 20 is partially cut away only from the upper side portion 22 a, and the rear side (rear side) side wall portion 23 is formed from the floor panel 13. A notch 22b is formed so that a communication hole is formed in the hollow portion 14, and an air blowing hole 15 is formed on the upper surface of the floor members 13A, 13B, and 13C.
As a result, as shown in FIGS. 1B and 1C, when cold air is fed from the notch 22b, the opposite end of the floor panel 13 is blocked by the side wall 22, so that the floor panel 13 Cold air is supplied from the air blowing holes 15 formed toward the heavy load mounting portion.
By using the hollow portion in this way, it is possible to easily provide cold air supply means to the mounting portion.
In the present embodiment, the cross panel 20 is also made of an extruded shape of an aluminum alloy.

As shown in FIG. 3, the support structure 10 according to the present invention includes those that do not have the blow hole 15 and the notch portion 22b in the side wall portion, and the upper side portion 22a of the cross panel 20 is partially formed as shown in FIG. Also included are those having a notch 22c cut into the notch.
Moreover, the thing without the upper side part 22a may be sufficient.

The support structure 10 according to the present invention connects the left and right side frames 11 and 12 and the floor panel 13 and forms a mounting portion such as a battery module having a U-shaped cross section on the inner side. When the longitudinal direction of the battery module is placed along the side frame when the battery module is mounted, the side portions on both sides of the battery module are supported by the left and right support portions 11A and 12A. Is mounted in the left-right direction, both ends of the battery module are supported by the left and right support columns 11A, 12A, and the battery modules can be stacked in two or more stages.
When battery modules are stacked, a plurality of battery modules may be placed in parallel on each stage.
Since the side frames 11 and 12 are connected to each other by a plurality of floor members 13A to 13C and integrated so as to wrap the connecting portion by the cross panel 20, the load is applied to each panel member with respect to the collision load in the front-rear direction. To be distributed.
In addition, against the side collision, the cross panel 20 suppresses the column parts 11A and 12A from falling down due to a collision load in the left-right direction.

DESCRIPTION OF SYMBOLS 10 Support structure 11 Side frame 11A Support | pillar part 11a Hollow part 11b Connecting part 11e Flange part 12 Side frame 12A Supporting part 12a Hollow part 12b Connected part 12e Flange part 12f Inner side 13 Floor panel 14 Hollow part 15 Air blow hole 20 Cross panel 21 Hollow part 22 Side wall part 22a Upper side part 22b Notch part 23 End part

Claims (6)

A support structure for mounting a heavy object such as a battery module on a vehicle,
The mounting part is formed by left and right side frames that support the side or end of a heavy object, and a floor panel that connects the side frames,
A support structure having a cross panel fitted between both end faces of a connecting portion between the side frame and the floor panel.   The side frame has a connecting portion projecting inward, the connecting portion has a connecting portion with a floor panel, and the left and right end portions of the cross panel are in contact with the inside of the side frame. The support structure according to claim 1.   The support structure according to claim 2, wherein the side frame has a flange portion projecting inward, and the lower surface of the end portion of the cross panel is placed on the flange portion.   The support structure according to claim 1, wherein the side frame has a plurality of hollow portions in the vertical direction.   One or both of a floor panel and a cross panel have a hollow part, The support structure in any one of Claims 1-4 characterized by the above-mentioned.   6. The support structure according to claim 5, wherein cold air supply means is formed through a hollow portion formed in one or both of the floor panel and the cross panel.

Images