JP6055658B2 - Battery module support structure - Google Patents

Description

  The present invention relates to a support structure for mounting a battery module and its peripheral devices or a relatively heavy object on a vehicle.

In the field of vehicles in which a secondary battery is mounted as a driving power source for electric vehicles, hybrid vehicles, plug-in hybrid vehicles, and the like, it is a challenge to achieve both a longer traveling distance and a lighter weight.
In the field of vehicles, it is also important to improve the collision performance and running stability of the entire vehicle body.
Patent Document 1 discloses an assembled battery for stacking the battery modules in multiple stages for the purpose of improving the efficiency of mounting the battery modules on a vehicle.
However, the assembled battery disclosed in the publication is such that the battery module is supported by the end plate on the end surface and the stack member on the side, and stacked on the support plate at the corner portion. Must be connected to each support plate, which not only requires a large number of parts and is difficult to assemble, but also because the vibration of the cells that occur during vehicle travel is directly transmitted to the stack members as vibrations. .
Moreover, since it cannot apply to battery modules other than the type which stacks a single battery, there exists a problem also in versatility.

JP2011-228165A

  An object of the present invention is to provide a support structure that is effective in improving the efficiency of mounting battery modules on a vehicle, is lightweight, and has excellent assemblability.

  A battery module support structure according to the present invention is a support structure for mounting a heavy object such as a battery module on a vehicle, and includes a base frame attached to the vehicle and at least one stacked on the base frame. The base frame and the intermediate frame are provided with a pair of left and right side walls on one or both of them to form a stacking part for stacking on the side wall part, and the base frame The first stage mounting space is formed between the intermediate frame and the second and subsequent mounting spaces are formed on the intermediate frame.

The expression “battery modules” here includes not only battery modules but also peripheral devices such as devices for controlling the battery modules. Furthermore, it is also applicable to mounting such heavy objects on vehicles. Is possible.
In the present invention, a plurality of intermediate frames are sequentially stacked, so that the mounting space can be divided into a plurality of stages in the battery modules.
In that case, a stacking portion is formed between the upper intermediate frame via a pair of left and right side walls.
In this specification, the wall part of the support structure formed along the longitudinal direction of the battery module to be mounted is expressed as a side wall, and the direction perpendicular to the side wall is expressed as the left-right direction.
In the present invention, the pair of left and right side walls means having side walls on both sides along the longitudinal direction of the base frame or the intermediate frame, and the left and right side wall structures do not necessarily have to be the same or symmetrical.

In the present invention, a cover member may be provided on an intermediate frame in which at least one or more are stacked.
This cover member is also preferably provided so as to be stacked on a pair of left and right side walls provided on the intermediate frame.

In the present invention, the structure of the stacking portion is not particularly limited as long as it can be stably stacked, but the mutual fitting structure is easy to assemble and mutually stable.
Further, the load is dispersed at the fitting portion, and the overall weight can be reduced.
In addition, it also has the effect of absorbing vibrations associated with vehicle travel.

In the present invention, the base frame may have a hollow cross-sectional shape at the bottom, and may have a mounting portion on the vehicle side.
Thus, when the bottom part of the base frame has a hollow cross-sectional shape, the rigidity is improved and the load of the stacked battery modules can be stably absorbed.
In addition, if the base frame is attached to the vehicle in a state where the bottom of the base frame has a hollow cross-sectional shape, it contributes to increasing the rigidity of the vehicle body.
When the stacking part with the intermediate frame stacked on the base frame is made into a fitting structure, not only the load is distributed more than the part that has been partially fastened as in the past, but also due to the mounting space by the combination of the base frame and the intermediate frame. Since increased rigidity is expected, this also contributes to increased rigidity of the vehicle body.
Therefore, if these structures are adopted, it contributes to the optimization of component arrangement, weight reduction, and cost reduction of the entire vehicle body.

  In the present invention, the cover member may be provided with an openable / closable slide cover member for accessing the inside.

  Since the battery modules according to the present invention can form a mounting space in a plurality of stages by stacking intermediate frames on the base frame, the battery module can be efficiently mounted in a limited space of the entire vehicle and electronic Equipment can be stacked together.

The structural example of the battery module support structure which concerns on this invention is shown. Examples of stacking structures of support structures are shown, and (a) to (d) show examples of fitting structures of stacked portions. The example of a component structure of a support structure is shown. The structural example of the slide cover member provided in the cover member is shown, (a) shows a state in which the slide cover member is closed, and (b) shows an open state. The fitting structure example of a cover member and a slide cover member is shown. (A), (b) shows the enlarged view of a fitting part.

A battery module support structure (hereinafter simply referred to as a support structure) 10 according to the present invention will be described with reference to the drawings, but the present invention is not limited to this embodiment.
FIG. 1 shows an external perspective view of the support structure 10, and FIG. 2 shows its structure.
This embodiment is an example in which battery modules and the like are provided in two stages, but by adding the intermediate frame 12, three or more installation spaces can be provided in the vertical direction.
Battery modules 1 and 2 indicated by a two-dot chain line in FIG. 2 can be mounted in this mounting space.
As shown in an exploded view in FIG. 3, the support structure 10 is an example in which an intermediate frame 12 is overlaid on a base frame 11 and a cover member 13 is overlaid on the intermediate frame 12.
These members can also be manufactured using an extruded shape of an aluminum alloy.

The base frame 11 is an example in which side walls 11b and 11c are erected from the left and right of the bottom portion 11a having a hollow cross-sectional shape, and an attachment portion 11d for attachment to a vehicle side such as a floor of a vehicle body is integrally formed.
In this embodiment, four attachment portions 11d are provided at both longitudinal ends of the base frame 11, and the attachment is made to the vehicle body side via attachment holes 11e provided in the attachment portions 11d.
Further, as shown in FIG. 3, a stud bolt 11g for fixing a battery module or the like is erected on the inner upper surface of the bottom portion 11a as required, and stud pins 12e provided on the side walls 12b and 12c of the intermediate frame 12 are provided. In this example, the positioning recess 11f is formed.

The intermediate frame 12 has side walls 12b and 12c that project from the upper side and the lower side on both sides in order to form a mounting space on the lower side and the upper side.
As shown in FIG. 2, the left and right side walls 12 b and 12 c form a stacking portion that fits with the base frame 11.
Although there is no limitation on the fitting structure of the stacking portion, a representative example is shown in FIG.
(A) is an example in which the left and right side walls 11b and 11c of the base frame 11 and the side walls 12b and 12c of the intermediate frame 12 are fitted to each other at two locations, an upper portion and a lower portion.
In the upper part, the key groove 12d of the intermediate frame 12 and the upper ends of the side walls 11b, 11c of the base frame 11 are fitted, and in the lower part, the lower ends of the side walls 12b, 12c of the intermediate frame 12 are fitted into the insertion grooves 11h of the base frame 11. .
(B) shows a fitting structure in which the side walls 12 b and 12 c of the intermediate frame 11 are inserted into a lateral key groove 11 i provided in the base frame 11.
(C) is an example in which the lower ends of the side walls 12b, 12c of the intermediate frame are formed in a T-shaped portion 12i, and the base frame 11 is formed in a groove shape 11j into which this is fitted.
On the contrary, (d) is an example in which the base frame side is a T-shaped portion 11k and the intermediate frame side is a fitting groove 12j.

  If necessary, the intermediate plate portion 12a of the intermediate frame 12 has a stat bolt 12g for fixing a battery module and the like, and has stud pins 12f near the upper portions of the side walls 12b and 12c.

The cover member 13 is for covering a battery module and an electronic device mounted on the intermediate frame 12.
The cover member 13 has side walls 13b and 13c extending downward from the left and right sides of the top plate portion 13a, and the lower end portions of the side walls 13b and 13c are connected to the upper end portions of the side walls 12b and 12c of the intermediate frame 12. It has a stacking part 13d.
Further, a recess 13e is formed to be received in the stud pin 12f provided on the intermediate frame 12.
As shown in FIGS. 4 and 5, the cover member 13 shows an example in which a part of the cover member 13 is cut out and a slide cover member 14 is provided to be fitted and slid on the side walls 12 b and 12 c of the intermediate frame 12.
The slide cover member 14 slides so as to overlap the cover member 13 and has a top plate portion 14a and side walls 14b and 14c.
The slide cover member 14 may be slid to the cover member. However, in order to make the opening large, it is preferable that the slide cover member 14 is fitted and slid to the intermediate frame 12, and an example of a fitting structure with the intermediate frame 12 is shown in FIG. , (B).
(A) is an example in which a lateral fitting groove 14d is formed on the slide cover member, and a fitting piece 13f is formed on the intermediate frame 12 side, and (b) is an intermediate frame 12 side also formed in the fitting groove 13g. This is an example.
In this way, as shown in FIG. 4, when the electronic device 3 such as the control unit is mounted inside, it is easy to access for maintenance or the like by simply opening the slide cover member.

DESCRIPTION OF SYMBOLS 10 Battery module support structure 11 Base frame 11a Bottom part 11d Attachment part 12 Intermediate frame 13 Cover member

Claims (2)

A support structure for mounting a heavy object including a battery module on a vehicle,
A base frame attached to the vehicle side;
Having at least one intermediate frame stacked on the base frame;
The base frame has side walls and insertion grooves erected on the left and right sides, the intermediate frame has a pair of left and right side walls and a key groove, and a tip of the side wall on the base frame side is a key on the intermediate frame side. Fitted into the groove, the lower end of the side wall on the intermediate frame side is fitted into the insertion groove on the base frame side,
A battery module support structure, wherein a first-stage mounting space is formed between the base frame and the intermediate frame, and second- and subsequent mounting spaces are formed on the intermediate frame. A cover member is provided on the at least one intermediate frame stacked;
The battery module support structure according to claim 1, wherein the cover member is provided with an openable / slidable slide cover member for accessing the inside.

Images