Patent Description:
In a vehicle that can be driven to travel using a motor, for example, an electric automobile or the like, a battery pack that supplies power to the motor is provided. In many cases, the battery pack is disposed below a floor assembly and is mounted to the floor assembly.

Such a vehicle typically includes an undercover that covers the battery pack from below in order to protect the battery pack. In consideration of manufacturing efficiency, the strength, and the like of the undercover, in some cases, the undercover is configured so as to connect a front panel and a rear panel located closer to a vehicle rear side than the front panel. Furthermore, there have been proposed various vehicle battery pack peripheral structures in which such a battery pack can be stably supported by the floor assembly, and the battery pack can be efficiently protected by the undercover.

As an example of the vehicle battery pack peripheral structure, the following vehicle battery pack peripheral structure is given. Specifically, one undercover is configured to connect two divided front half portion (front panel) and rear half portion (rear panel) with each other, and a connecting portion between the front half portion and the rear half portion is disposed so as to pass below the battery unit (battery pack). Furthermore, a pair of front support members are provided at a front end portion of the battery unit, and the pair of front support members are fixed to a cross member extending in a width direction of a vehicle body. (For example, see <CIT>, in particular, paragraph [<NUM>] to paragraph [<NUM>], and <FIG> and <FIG>.

<CIT> discloses, for the purpose of reducing deformation of a battery unit in a vehicle rear-end collision, a vehicle battery mounting structure which includes a floor panel, a center cross member, a battery unit, a battery bracket, and a battery lower cover and that the battery unit in the form of a battery rear frame is assembled to the center cross member by means of the battery bracket.

In general, foreign matter such as gravel and muddy water splashed up by wheels of a vehicle, in particular, front wheels, or obstacles such as steps between sidewalks and traveling roads, curbstones, and car stoppers on which the vehicle runs tend to hit the undercover from a front side and a lower side of the vehicle. Furthermore, in the above-mentioned example of the vehicle battery pack peripheral structure, the connecting portion between the front panel and the rear panel of the undercover is provided so as to pass below the battery pack, and the front panel merely extends substantially flat in the range from a position forward from the battery pack to the middle of the battery pack in the vehicle front-rear direction. Furthermore, a rear region of the front panel is overlapped with a front region of the battery pack in the vehicle front-rear direction, and the rear region of the front panel is located close to the front region of the battery pack.

Therefore, in the above-mentioned example of the vehicle battery pack peripheral structure, the substantially flat front panel cannot sufficiently absorb an impact due to being hit by the matter or obstacles as described. Furthermore, the impact applied to a front region of the front panel may be transmitted to the front region of the battery pack via the rear region of the front panel. In this case, the undercover may not be able to sufficiently protect the battery pack. Furthermore, due to hitting the undercover by the matter or obstacles, unpleasant noise for occupants may be caused mainly from the undercover.

Furthermore, in the above-mentioned example of the vehicle battery pack peripheral structure, the battery pack is merely mounted to the cross member by the pair of front support members provided at the front end portion of the battery pack. Therefore, the mounting of the battery pack to the cross member may not be able to be sufficiently protected from the impact caused by foreign matter or obstacles when they hit the undercover from the front side and the lower side of the vehicle as described above. Therefore, the battery pack may not be able to be stably supported.

In view of such circumstances, in a vehicle battery pack peripheral structure, it is desired to efficiently protect a battery pack and stably support the battery pack.

In order to solve the problems, a vehicle battery pack peripheral structure according to the invention includes the features of claim <NUM>.

In the vehicle battery pack peripheral structure according to the invention, the battery pack can be efficiently protected, and the battery pack can be stably supported.

A vehicle battery pack peripheral structure according to an embodiment is described together with a vehicle provided with the vehicle battery pack peripheral structure. The vehicle provided with the vehicle battery pack peripheral structure according to the present embodiment (hereinafter simply referred to as "battery pack peripheral structure" as necessary) is an electric automobile. However, the vehicle may be a motor-driven vehicle which is other than an electric automobile and can be provided with the battery pack peripheral structure.

In <FIG> used in the description herein, directions based on the vehicle are referred to as follows: In <FIG>, <FIG>, and <FIG>, the vehicle front side and the vehicle rear side are respectively indicated by the one-headed arrow F and the one-headed arrow B. In <FIG>, <FIG>, and <FIG>, the left side and the right side as facing the vehicle front side are respectively indicated by the one-headed arrow L and the one-headed arrow R. The vehicle width direction is indicated by the one-headed arrow L and the one-headed arrow R. Furthermore, in <FIG> and <FIG> to <FIG>, the vehicle upper side and the vehicle lower side are respectively indicated by the one-headed arrow U and the one-headed arrow D.

The left side and the right side respectively indicate a left side and a right side when facing the vehicle front side. The horizontal direction indicates a direction along the front-rear direction and the width direction of the vehicle. The vehicle upper side and the vehicle lower side are respectively simply referred to as an upper side and a lower side in some cases.

With reference to <FIG>, a vehicle battery pack peripheral structure <NUM> according to the present embodiment is described. That is, the vehicle battery pack peripheral structure <NUM> according to the present embodiment is schematically configured as described below. As illustrated in <FIG>, the vehicle battery pack peripheral structure <NUM> is provided in the vehicle.

As illustrated in <FIG>, the vehicle battery pack peripheral structure <NUM> includes a floor assembly <NUM> constituting a floor <NUM> of the vehicle. As illustrated in <FIG> and <FIG> to <FIG>, the battery pack peripheral structure <NUM> includes a battery pack <NUM> located below the floor assembly <NUM>.

As illustrated in <FIG>, <FIG>, <FIG>, and <FIG>, the battery pack peripheral structure <NUM> includes brackets <NUM> configured so as to mount the battery pack <NUM> to the floor assembly <NUM>. Here, the battery pack peripheral structure <NUM> according to the present embodiment includes two brackets <NUM> spaced from each other in the vehicle width direction. The battery pack peripheral structure may include only one of the two brackets.

In other words, the battery pack peripheral structure <NUM> according to the present embodiment includes a pair of left and right brackets <NUM> in the vehicle width direction. Those two brackets <NUM> are formed substantially symmetrical in the vehicle width direction. In the following, unless otherwise mentioned, only one of the two brackets <NUM> and its peripheral part are described.

As illustrated in <FIG>, <FIG>, and <FIG> to <FIG>, the battery pack peripheral structure <NUM> includes an undercover <NUM> that covers the battery pack <NUM> from below. As illustrated in <FIG>, the floor assembly <NUM> includes a cross member <NUM> extending in the vehicle width direction along the floor assembly <NUM>. As illustrated in <FIG>, the bracket <NUM> is mounted to the battery pack <NUM> and the cross member <NUM>. The cross member <NUM> is disposed closer to the vehicle front side than a front end of the battery pack <NUM> in the vehicle front-rear direction.

As illustrated in <FIG>, <FIG>, <FIG>, and <FIG>, the undercover <NUM> includes a front panel <NUM> and a rear panel <NUM> located closer to the vehicle rear side than the front panel <NUM>. A coupling region <NUM> that couples a rear-end region <NUM> of the front panel <NUM> in the vehicle front-rear direction and a front-end region <NUM> of the rear panel <NUM> in the vehicle front-rear direction is formed. As illustrated in <FIG>, a fixing region <NUM> that fixes the battery pack <NUM> and the bracket <NUM> to each other is located closer to the vehicle rear side than the coupling region <NUM>.

Furthermore, the vehicle battery pack peripheral structure <NUM> according to the present embodiment can be schematically configured as described below. As illustrated in <FIG>, the floor assembly <NUM> includes a floor tunnel <NUM> located at a substantially center thereof in the vehicle width direction. The floor tunnel <NUM> is formed so as to bulge upward and extend in the vehicle front-rear direction. The cross member <NUM> is disposed so as to cross the floor tunnel <NUM>.

As illustrated in <FIG>, the bracket <NUM> is disposed so as to cover the battery pack <NUM> from the vehicle front side and the outer side in the vehicle width direction. The fixing region <NUM> includes a lower fixing portion <NUM> that fixes a lower region <NUM> of the battery pack <NUM> and the bracket <NUM> to each other.

The battery pack <NUM> includes a side wall <NUM> located at a side end thereof in the vehicle width direction. The battery pack <NUM> includes a bottom wall <NUM> located at a lower end thereof. The bracket <NUM> includes a side portion <NUM> opposed to the side wall <NUM> of the battery pack <NUM>. The bracket <NUM> includes a bottom portion <NUM> opposed to the bottom wall <NUM> of the battery pack <NUM>.

The fixing region <NUM> includes a side fixing area <NUM> that fixes the side wall <NUM> of the battery pack <NUM> and the side portion <NUM> of the bracket <NUM> to each other. The fixing region <NUM> includes a bottom fixing area <NUM> that fixes the bottom wall <NUM> of the battery pack <NUM> and the bottom portion <NUM> of the bracket <NUM> to each other. In particular, the lower fixing portion <NUM> of the fixing region <NUM> can include the side fixing area <NUM> and the bottom fixing area <NUM>.

The bracket <NUM> includes a side coupling portion <NUM> that couples the side portion <NUM> and the bottom portion <NUM> thereof to each other. The side coupling portion <NUM> is disposed so as to be spaced from the side wall <NUM> of the battery pack <NUM>.

As illustrated in <FIG>, <FIG>, and <FIG>, the battery pack peripheral structure <NUM> includes a bar member <NUM> disposed below the bracket <NUM> along the vehicle width direction. The battery pack peripheral structure <NUM> includes a mounting member <NUM> configured so as to mount the bar member <NUM> to the bracket <NUM>. The mounting member <NUM> is fixed to the bracket <NUM> and the bar member <NUM> in a state of being sandwiched between the bracket <NUM> and the bar member <NUM> in the up-down direction.

With reference to <FIG>, the floor assembly <NUM> can be configured as described below in detail. The floor assembly <NUM> includes two floor panels <NUM>, each located on either side of the floor tunnel <NUM> in the vehicle width direction. The cross member <NUM> is located below the floor tunnel <NUM> and the two floor panels <NUM>.

In particular, as illustrated in <FIG>, the floor assembly <NUM> includes two side members <NUM> spaced from each other in the vehicle width direction. Each side member <NUM> is disposed along the front-rear direction. The cross member <NUM> extends in the vehicle width direction so as to couple these two side members <NUM>.

In particular, as illustrated in <FIG>, the floor tunnel <NUM> is formed so as to have a cross section having a substantially hat shape. The floor tunnel <NUM> includes a top surface portion 12a located at an upper end thereof. The floor tunnel <NUM> includes two side surface portions 12b each extending downward from either side end of the top surface portion 12a in the vehicle width direction. The two side surface portions 12b are formed so as to increase a distance between the two side surface portions 12b as they extend from the upper side toward the down side. The floor tunnel <NUM> includes two flange portions 12c respectively protruding from lower ends of the two side surface portions 12b toward both sides in the vehicle width direction.

As illustrated in <FIG>, the cross member <NUM> is located so as to overlap with the coupling region <NUM> of the undercover <NUM> in the vehicle front-rear direction. With reference to <FIG>, the cross member <NUM> abuts on the floor tunnel <NUM> in the up-down direction, and is joined to the floor tunnel <NUM> by welding. With reference to <FIG> and <FIG>, the cross member <NUM> abuts also on the two floor panels <NUM> in the up-down direction, and is joined to each of the two floor panels <NUM> by welding. However, the joining can also be attained by joining means other than welding.

With reference to <FIG> and <FIG> to <FIG>, the battery pack <NUM> can be configured as described below in detail. The battery pack <NUM> is configured to be capable of supplying power to a motor (not shown) used for travel driving of the vehicle. Furthermore, the battery pack <NUM> is configured to be chargeable.

As illustrated in <FIG>, <FIG>, and <FIG>, the battery pack <NUM> includes a connector <NUM> connected to high voltage cables <NUM> configured to be capable of supplying power to the outside and receiving power from the outside of the battery pack <NUM>. Furthermore, the connector <NUM> is disposed so as to overlap with the floor tunnel <NUM> in the vehicle width direction.

As illustrated in <FIG> and <FIG> to <FIG>, the lower region <NUM> of the battery pack <NUM> is a lower case <NUM>. An upper region <NUM> of the battery pack <NUM> is an upper case <NUM>. The lower case <NUM> is located below the upper case <NUM>. The lower case <NUM> is disposed so as to be aligned with the upper case <NUM> in the up-down direction and these are coupled to each other. As illustrated in <FIG> and <FIG>, an internal device <NUM> including a battery module 27a of the battery pack <NUM> is disposed inside the lower case <NUM> and the upper case <NUM> coupled to each other in this way.

With reference to <FIG> and <FIG> to <FIG>, the battery pack <NUM> includes a front wall <NUM> located at a front end thereof. The front wall <NUM> is disposed along the vehicle width direction. Each side wall <NUM> is disposed along the vehicle front-rear direction. The bottom wall <NUM> is disposed along the horizontal direction. The lower case <NUM> includes a lower portion 22a of the side wall <NUM>, the bottom wall <NUM>, and a lower portion 28a of the front wall <NUM>.

With reference to <FIG> and <FIG>, the bracket <NUM> can be configured as described below in detail. As illustrated in <FIG>, the side portion <NUM> of the bracket <NUM> is opposed to the lower portion 22a of the side wall <NUM> of the battery pack <NUM>. As illustrated in <FIG>, the bracket <NUM> includes a front portion <NUM> opposed to the front wall <NUM> of the battery pack <NUM>. Furthermore, the front portion <NUM> of the bracket <NUM> can be opposed to the lower portion 28a of the front wall <NUM>.

The bracket <NUM> includes a front coupling portion <NUM> that couples the bottom portion <NUM> and the front portion <NUM> to each other. The front coupling portion <NUM> is disposed so as to be spaced from the front wall <NUM> of the battery pack <NUM>. The front coupling portion <NUM> is continuous with the side coupling portion <NUM>.

As illustrated in <FIG>, the bracket <NUM> includes a protruding region <NUM> formed so as to protrude from the front wall <NUM> of the battery pack <NUM> along the side wall <NUM> of the battery pack <NUM>. The bracket <NUM> protrudes from the front wall <NUM> in a cantilever shape. The protruding region <NUM> is formed in a substantially planar shape along the horizontal direction.

As illustrated in <FIG> and <FIG>, the bottom portion <NUM> of the bracket <NUM> is formed as one bottom member <NUM>. The bracket <NUM> includes a corner member <NUM> at which the side portion <NUM> and the front portion <NUM> are integrally formed. The bottom member <NUM> and the corner member <NUM> respectively include protruding areas 32a and 37a formed so as to define the protruding region <NUM>.

As illustrated in <FIG>, the side portion <NUM> of the bracket <NUM> is joined to the side wall <NUM> of the battery pack <NUM>, in particular, the lower portion 22a of the side wall <NUM>, by welding. The bottom portion <NUM> of the bracket <NUM> is joined to the bottom wall <NUM> of the battery pack <NUM> by welding. In the side coupling portion <NUM>, the side portion <NUM> and the bottom portion <NUM> of the bracket <NUM> can be joined to each other by welding.

As illustrated in <FIG>, the front portion <NUM> of the bracket <NUM> is joined to the front wall <NUM> of the battery pack <NUM>, in particular, the lower portion 28a of the front wall <NUM>, by welding. The fixing region <NUM> includes a front fixing area <NUM> that fixes the front wall <NUM> of the battery pack <NUM> and the front portion <NUM> of the bracket <NUM> to each other. In particular, the lower fixing portion <NUM> of the fixing region <NUM> can include the front fixing area <NUM>. As illustrated in <FIG> and <FIG>, in the front coupling portion <NUM>, the bottom portion <NUM> and the front portion <NUM> of the bracket <NUM> can be joined to each other by welding. However, the joining can also be attained by joining means other than welding.

With reference to <FIG> and <FIG> to <FIG>, the undercover <NUM> can be configured as described below in detail. As illustrated in <FIG> and <FIG>, the front panel <NUM> of the undercover <NUM> includes two side regions <NUM> respectively adjacent to both sides of the floor tunnel <NUM> in the vehicle width direction. In particular, although not clearly illustrated, the two side regions <NUM> are respectively located below a driver seat and a front passenger seat. As illustrated in <FIG> and <FIG>, the rear panel <NUM> abuts on the battery pack <NUM> in the up-down direction.

With reference to <FIG>, <FIG>, and <FIG>, the undercover <NUM> includes two intermediate mounting portions <NUM> configured so as to mount the coupling region <NUM> of the undercover <NUM> to the cross member <NUM> through intermediation of the brackets <NUM>. The two intermediate mounting portions <NUM> are respectively located closer to both sides of the floor tunnel <NUM> in the vehicle width direction. However, the undercover can include one or three or more intermediate mounting portions.

In particular, although not clearly illustrated, each intermediate mounting portion <NUM> is specifically configured so as to be fastened to the bracket <NUM>, in particular, the protruding region <NUM> of the bracket <NUM>, by fastening means using a bolt or screw and a nut in a state in which the rear-end region <NUM> of the front panel <NUM> and the front-end region <NUM> of the rear panel <NUM> overlap with each other in the up-down direction. However, this fastening can also be attained by fastening means other than the fastening means using a bolt or screw and a nut. The mounting of the intermediate mounting portion, the front panel, and the rear panel can also use means other than the fastening means.

As illustrated in <FIG> and <FIG>, the undercover <NUM> has a relief groove <NUM> penetrating in the up-down direction in a manner of avoiding the mounting member <NUM>. In more detail, the rear panel <NUM> has a cutout portion <NUM> cut out from the front-end region <NUM> of the rear panel <NUM> toward the vehicle rear side in a manner of avoiding the mounting member <NUM>. The relief groove <NUM> is defined by the rear-end region <NUM> of the front panel <NUM> in the vehicle front-rear direction and the cutout portion <NUM> of the rear panel <NUM>.

The undercover <NUM> can have two such relief grooves <NUM> penetrating in the up-down direction in a manner of respectively avoiding the two mounting members <NUM> described later. In this case, the rear panel <NUM> can have two cutout portions <NUM> cut out from the front-end region <NUM> toward the vehicle rear side in a manner of respectively avoiding the two mounting members <NUM>. However, the number of the relief grooves of the undercover is not limited to two.

With reference to <FIG>, <FIG>, and <FIG>, the bar member <NUM> can be configured as described below in detail. The bar member <NUM> is located below the front-end region <NUM> of the rear panel <NUM>. The bar member <NUM> is opposed to the front-end region <NUM> of the rear panel <NUM> in the up-down direction.

The bar member <NUM> is disposed so as to be adjacent to the coupling region <NUM> of the undercover <NUM> in the vehicle front-rear direction. The bar member <NUM> extends over the entire front-end region <NUM> of the rear panel <NUM>. The bar member <NUM> is formed in a substantially arc shape protruding from the vehicle rear side toward the vehicle front side. The bar member <NUM> can be formed in a pipe shape.

With reference to <FIG>, <FIG>, and <FIG>, the mounting members <NUM> can be configured as described below in detail. As illustrated in <FIG> and <FIG>, the battery pack peripheral structure <NUM> includes the two mounting members <NUM> arranged being spaced from each other in the vehicle width direction. However, the battery pack peripheral structure can also include one or three or more mounting members.

As illustrated in <FIG>, the mounting member <NUM> is located in the protruding region <NUM> of the bracket <NUM>. The mounting member <NUM> includes a base portion <NUM> that abuts on the bottom portion <NUM> of the bracket <NUM> in the direction from the upper side toward the down side. The mounting member <NUM> includes a support portion <NUM> protruding downward from the base portion <NUM>. An end portion <NUM> of the bar member <NUM> in the longitudinal direction abuts on the support portion <NUM> in the direction from the down side toward the upper side.

The mounting member <NUM> is fastened to the bracket <NUM> by fastening means using a bolt or screw and a nut. However, this fastening can also be attained by fastening means other than the fastening means using a bolt or screw and a nut. The mounting of the bracket and the mounting member can also use means other than the fastening means.

The support portion <NUM> of the mounting member <NUM> is joined to the end portion <NUM> of the bar member <NUM> in the longitudinal direction by welding. However, the joining can also be attained by joining means other than welding.

As described above, the vehicle battery pack peripheral structure <NUM> according to the present embodiment includes: the floor assembly <NUM> constituting the floor <NUM> of the vehicle; the battery pack <NUM> located below the floor assembly <NUM>; the bracket <NUM> configured so as to mount the battery pack <NUM> to the floor assembly <NUM>; and the undercover <NUM> that covers the battery pack <NUM> from below, the floor assembly <NUM> including the cross member <NUM> extending in the vehicle width direction along the floor assembly <NUM>, the bracket <NUM> being mounted to the battery pack <NUM> and the cross member <NUM>, in which the cross member <NUM> and the bracket <NUM> are disposed closer to the vehicle front side than the front end of the battery pack <NUM> in the vehicle front-rear direction, in which the undercover <NUM> includes the front panel <NUM> and the rear panel <NUM> located closer to the vehicle rear side than the front panel <NUM>, in which the coupling region <NUM> that couples the rear-end region <NUM> of the front panel <NUM> in the vehicle front-rear direction and the front-end region <NUM> of the rear panel <NUM> in the vehicle front-rear direction is formed, and in which the fixing region <NUM> that fixes the battery pack <NUM> and the bracket <NUM> to each other is located closer to the vehicle rear side than the coupling region <NUM>.

In general, at the time of traveling of the vehicle, foreign matter such as gravel and muddy water splash up from below the vehicle by wheels (not shown), in particular, front wheels (not shown), or obstacles such as steps between sidewalks and roads, curbstones, and car stoppers on which the vehicle runs are likely to hit a front part of the undercover <NUM> in the vehicle front-rear direction from the front side and the lower side of the vehicle.

In contrast, in the vehicle battery pack peripheral structure <NUM> according to the present embodiment, the front panel <NUM> is disposed closer to the vehicle front side than the battery pack <NUM>. In this case, the battery pack <NUM> is located above the rear panel <NUM>, whereas the battery pack <NUM> is not located above the front panel <NUM>, and thus, a space is formed above the front panel <NUM>. Such a space can have a sufficient height corresponding to the thickness of the battery pack <NUM> between the front panel <NUM> and the floor assembly <NUM>. Therefore, even when foreign matter or the like hit the front panel <NUM>, and impact, vibration, or the like resulting from the hitting are applied to the front panel <NUM>, it is possible to suppress the direct transmission of such impact, vibration, or the like to the battery pack via the undercover <NUM>.

Furthermore, the impact transmitted from the front panel <NUM> to the rear panel <NUM> can be relaxed by the coupling region <NUM> having high rigidity. As a result, the battery pack <NUM> located above the rear panel <NUM> can be efficiently protected from such impact. For example, even when the front panel <NUM> drops off, the battery pack <NUM> is kept covered by the rear panel <NUM>, so that the battery pack <NUM> can be efficiently protected.

Furthermore, the fixing region <NUM> that fixes the battery pack <NUM> and the bracket <NUM> to each other is located closer to the vehicle rear side than the coupling region <NUM> having high rigidity. Therefore, the mounting of the battery pack <NUM> to the cross member <NUM> through intermediation of the bracket <NUM> can be efficiently protected from the impact caused by foreign matter or obstacles when they hit the undercover <NUM> from the front side and the lower side of the vehicle by the coupling region <NUM> having high rigidity. Accordingly, the battery pack <NUM> can be stably supported.

In the vehicle battery pack peripheral structure <NUM> according to the present embodiment, the floor assembly <NUM> includes the floor tunnel <NUM> located at the center in the vehicle width direction, the floor tunnel <NUM> is formed so as to bulge upward and extend in the vehicle front-rear direction, the cross member <NUM> is disposed so as to cross the floor tunnel <NUM>, and the bracket <NUM> is disposed so as to cover the battery pack <NUM> from the vehicle front side and the outer side in the vehicle width direction.

In this vehicle battery pack peripheral structure <NUM>, the fixing region <NUM> that fixes the battery pack <NUM> and the bracket <NUM> to each other can be disposed on the front side of the battery pack <NUM> and the outer side of the battery pack <NUM> in the vehicle width direction. Therefore, the fixing region <NUM> can be increased. As a result, the mounting rigidity of the battery pack <NUM> to the cross member <NUM> through intermediation of the bracket <NUM> can be enhanced. Thus, the battery pack <NUM> can be stably supported.

In the vehicle battery pack peripheral structure <NUM> according to the present embodiment, the fixing region <NUM> includes the lower fixing portion <NUM> that fixes the lower region <NUM> of the battery pack <NUM> and the bracket <NUM> to each other. Therefore, the battery pack <NUM> can be effectively protected by the bracket <NUM> from the impact caused by foreign matter or obstacles when they hit the undercover <NUM> from the front side and the lower side of the vehicle. Furthermore, with the bracket <NUM>, the battery pack <NUM> can be stably supported from below.

In the vehicle battery pack peripheral structure <NUM> according to the present embodiment, the battery pack <NUM> includes the side wall <NUM> located at the side end thereof in the vehicle width direction, and the bottom wall <NUM> located at the lower end of the battery pack <NUM>, the bracket <NUM> includes the side portion <NUM> opposed to the side wall <NUM> of the battery pack <NUM>, and the bottom portion <NUM> opposed to the bottom wall <NUM> of the battery pack <NUM>, the fixing region <NUM> includes the side fixing area <NUM> that fixes the side wall <NUM> of the battery pack <NUM> and the side portion <NUM> of the bracket <NUM> to each other, and the bottom fixing area <NUM> that fixes the bottom wall <NUM> of the battery pack <NUM> and the bottom portion <NUM> of the bracket <NUM> to each other, and the side coupling portion <NUM> that couples the side portion <NUM> and the bottom portion <NUM> of the bracket <NUM> to each other is disposed so as to be spaced from the side wall <NUM> of the battery pack <NUM>.

In such a vehicle battery pack peripheral structure <NUM>, the fixing region <NUM> can be increased by the side fixing area <NUM> and the bottom fixing area <NUM>. As a result, the mounting rigidity of the battery pack <NUM> to the cross member <NUM> through intermediation of the bracket <NUM> can be enhanced. Thus, the battery pack <NUM> can be stably supported.

Furthermore, the side coupling portion <NUM> that couples the side portion <NUM> and the bottom portion <NUM> of the bracket <NUM> to each other is disposed so as to be spaced from the side wall <NUM> of the battery pack <NUM>. Therefore, a space is formed between the bracket <NUM> and the battery pack <NUM>. Such a space can relax the impact caused by foreign matter or obstacles when they hit the undercover <NUM> from the front side and the lower side of the vehicle. Therefore, the battery pack <NUM> can be efficiently protected by the space between the bracket <NUM> and the battery pack <NUM>.

The vehicle battery pack peripheral structure <NUM> according to the present embodiment includes: the bar member <NUM> disposed below the bracket <NUM> along the vehicle width direction; and the mounting member <NUM> configured so as to mount the bar member <NUM> to the bracket <NUM>, in which the mounting member <NUM> is fixed to the bracket <NUM> and the bar member <NUM> in a state of being sandwiched between the bracket <NUM> and the bar member <NUM> in the up-down direction.

Claim 1:
A vehicle battery pack peripheral structure (<NUM>) including:
a floor assembly (<NUM>) constituting a floor (<NUM>) of a vehicle;
a battery pack (<NUM>) located below the floor assembly (<NUM>);
a bracket (<NUM>) configured so as to mount the battery pack (<NUM>) to the floor assembly (<NUM>); and
an undercover (<NUM>) that covers the battery pack (<NUM>) from below,
the floor assembly (<NUM>) including a cross member (<NUM>) extending in a vehicle width direction along the floor assembly (<NUM>),
the bracket (<NUM>) being mounted to the battery pack (<NUM>) and the cross member (<NUM>),
wherein the cross member (<NUM>) is disposed closer to a vehicle front side than a front end of the battery pack (<NUM>) in a vehicle front-rear direction,
characterized in that:
the undercover (<NUM>) includes a front panel (<NUM>) disposed closer to the vehicle front side than the battery pack (<NUM>) and a rear panel (<NUM>) located closer to a vehicle rear side than the front panel (<NUM>), the battery pack (<NUM>) located above the rear panel (<NUM>) but not located above the front panel (<NUM>),
wherein a rear-end region (<NUM>) of the front panel (<NUM>) in the vehicle front-rear direction and a front-end region (<NUM>) of the rear panel (<NUM>) in the vehicle front-rear direction are coupled to each other at a coupling region (<NUM>), and
wherein a fixing region (<NUM>) in which the battery pack (<NUM>) and the bracket (<NUM>) are fixed to each other is located closer to the vehicle rear side than the coupling region (<NUM>).