JP7533211B2 - Vibration suppression structure for battery pack - Google Patents

Description

The present invention relates to a vibration suppression structure for a battery pack.

Vehicles such as automobiles are often equipped with a battery pack that includes multiple battery modules, and the power from this battery pack is supplied to a motor for driving. A conventional battery pack is described in Patent Document 1. The battery pack described in Patent Document 1 includes a fan unit that takes in air from outside the battery pack and a support frame that supports the fan unit, and the fan unit is arranged so that the support frame bridges the upper part of the battery module.

JP 2012-111466 A

The fan unit is one of the heaviest components of the battery pack and is therefore prone to vibration when the vehicle is traveling. Therefore, in order to suppress vibration of the fan unit, it is preferable to firmly support the fan unit using a highly rigid reinforcing member or the like.

However, in the battery pack described in Patent Document 1, if a reinforcing member is provided integrally or separately to the support frame to increase the rigidity of the support frame that supports the fan unit, there is a risk that the weight of the battery pack will increase due to the newly added reinforcing member.

The present invention was made in light of the above-mentioned circumstances, and aims to provide a vibration suppression structure for a battery pack that can suppress the vibration of a blower fan without increasing the weight of the battery pack.

The present invention provides a vibration suppression structure for a battery pack comprising a battery module, an air duct connected to a blower fan for sending air from the blower fan to the battery module, and a battery case that houses the blower fan, the battery module and the air duct and is mounted on a vehicle, the structure comprising a base portion having a mounting member arranged above a lower surface of the battery case and on which the blower fan is placed, and a leg member connected to the mounting member and the lower surface of the battery case and supporting the mounting member, the leg member having a main body portion extending in the vertical direction of the vehicle and in the longitudinal direction of the vehicle, the air duct having a battery case mounting portion fixed to the battery case, and the battery case mounting portion being fixed to the battery case at a position closer to the mounting member than the end of the battery module adjacent to the mounting member in the longitudinal direction of the vehicle that is farther from the mounting member in the longitudinal direction of the vehicle, and at a position closer to the center than the end of the mounting member in the width direction of the vehicle .

In this way, the present invention provides a vibration suppression structure for a battery pack that can suppress the vibration of the blower fan without increasing the weight of the battery pack.

FIG. 1 is a bottom view of a floor panel and a battery pack of a vehicle equipped with a vibration suppression structure for a battery pack according to one embodiment of the present invention. FIG. 2 is a plan view of region S in FIG. FIG. 3 is a perspective view of the rear of a battery pack of a vehicle equipped with a vibration suppression structure for a battery pack according to one embodiment of the present invention. 4 is a cross-sectional view taken along the line IV-IV of the battery pack shown in FIG. 2. FIG. 5 is a cross-sectional view taken along the line VV of the battery pack shown in FIG. 2. FIG. FIG. 6 is a plan view of the inside of a battery pack of a vehicle equipped with a vibration suppression structure for a battery pack according to one embodiment of the present invention.

The vibration suppression structure for a battery pack according to one embodiment of the present invention is a vibration suppression structure for a battery pack including a battery module, an air duct connected to a blower fan and sending air from the blower fan to the battery module, and a battery case that houses the blower fan, the battery module, and the air duct and is mounted on a vehicle, and includes a base portion that is disposed above the lower surface of the battery case and has a mounting member on which the blower fan is mounted, and a leg member that is connected to the mounting member and the lower surface of the battery case and supports the mounting member, the leg member having a main body portion that extends in the vehicle up-down direction and the vehicle front-rear direction, the air duct has a battery case attachment portion that is fixed to the battery case, and the battery case attachment portion is fixed to the battery case at a position closer to the mounting member than the end of the battery module adjacent to the mounting member in the vehicle front-rear direction that is farther from the mounting member in the vehicle front-rear direction. As a result, the vibration suppression structure for a battery pack according to one embodiment of the present invention can suppress the vibration of the blower fan without increasing the weight of the battery pack.

The following describes a vibration suppression structure for a battery pack according to one embodiment of the present invention with reference to the drawings. In Figs. 1 to 6, the up-down, front-rear, left-right and up-down directions refer to the up-down, front-rear, left-right and up-down directions of the battery pack when installed in a vehicle, the direction perpendicular to the front-rear direction of the vehicle is the left-right direction, and the height direction of the battery pack is the up-down direction.

Figures 1 to 6 show a vibration suppression structure for a battery pack according to one embodiment of the present invention.

First, the configuration will be described. In FIG. 1, a vehicle 1 has a vehicle body 2. The vehicle body 2 has a pair of left and right side members 11 and a floor panel 2A connected to the pair of side members 11. A floor tunnel 2B extending in the front-rear direction of the vehicle is formed in the center of the floor panel 2A in the vehicle width direction.

A battery pack 20 is disposed under the floor panel 2A. The battery pack 20 supplies power to a motor (not shown) of the vehicle 1. The battery pack 20 is disposed between a pair of side members 11.

In Figures 2 and 3, the battery pack 20 includes a battery module group 60 consisting of multiple battery modules 61 arranged in the vehicle front-rear direction and vehicle width direction, and a blower fan 55 (see Figure 2) located above the rear of the battery module group 60.

A battery module 62 (see FIG. 5) having a similar configuration to battery module 61 is provided behind battery module group 60. The blower fan 55 is disposed on the top of battery module 62.

The battery pack 20 also includes a battery case 21. The battery case 21 houses an air duct 70, the battery modules 61 and 62, and an air blower fan 55. The air duct 70 is connected to the air blower fan 55, and blows air from the air blower fan 55 to the battery module 61. The air duct 70 extends along the outer periphery of the battery module group 60 as a whole.

In FIG. 5, the battery case 21 is composed of a lower case 40 and an upper case 30. The upper case 30 is represented by a dashed line in FIG. 5. The battery case 21 is integrated by fastening a flange portion 41 formed on the outer edge of the lower case 40 to a flange portion 31 formed on the outer edge of the upper case 30.

A number of battery modules 61 are fixed to the lower case 40. The lower case 40 covers the bottom and side surfaces of the battery modules 61. The upper case 30 covers the top surfaces of the battery modules 61 while blocking the lower case 40 from above.

In FIG. 2, the air duct 70 has a first duct member 71 extending in the vehicle width direction, a second duct member 73 extending in the vehicle front-rear direction, and an intermediate duct member 72 connected to the first duct member 71 and the second duct member 73. In this way, the air duct 70 has a divided structure divided into multiple members.

In this embodiment, the structure is such that air is sent to both ends of the battery case 21 in the vehicle width direction, so the first duct member 71 extends in both directions in the vehicle width direction. When adopting a structure that sends air to one end of the battery case 21 in the vehicle width direction, the first duct member 71 only needs to extend to the one end side in the vehicle width direction. Therefore, it is sufficient that the first duct member 71 extends to at least one side in the vehicle width direction.

Air outside the battery case 21 is supplied to the battery module group 60 by passing through the first duct member 71, the intermediate duct member 72, and the second duct member 73 in that order. Therefore, the first duct member 71 is the upstream duct member relative to the intermediate duct member 72, and the second duct member 73 is the downstream duct member relative to the intermediate duct member 72.

The first duct member 71 extends in the vehicle width direction as a whole. The first duct member 71 is disposed above the rear of the battery module group 60. The first duct member 71 is provided with a blower fan connection portion 71A, which extends in the rear direction and is connected at its rear end to the blower fan 55.

The first duct member 71 has a branch portion 71B, which is provided at the front end of the blower fan connection portion 71A and extends in the vehicle width direction. The branch portion 71B branches out to the left and right in the vehicle width direction and extends along the rear of the battery module group 60. The downstream end (left end) of the first duct member 71 opens to the left.

The intermediate duct member 72 is connected to the downstream end of the branch portion 71B of the first duct member 71. The intermediate duct member 72 has a vehicle width direction extension portion 72A that extends in the vehicle width direction and is connected to the first duct member 71, a vehicle front-rear direction extension portion 72C that extends in the vehicle front-rear direction and is connected to the second duct member 73, and a bent portion 72B that is bent so as to communicate with the vehicle width direction extension portion 72A and the vehicle front-rear direction extension portion 72C.

The vehicle longitudinal extension portion 72C is disposed in the gap between the battery module 61 and the battery case 21. The vehicle longitudinal extension portion 72C also extends forward along the side wall 42 of the battery case 21. The upstream end (right end) of the vehicle width direction extension portion 72A of the intermediate duct member 72 opens to the right and is connected to the downstream end (left end) of the first duct member 71.

The upstream end of the second duct member 73 is connected to the downstream end of the vehicle longitudinal extension portion 72C. The second duct member 73 is disposed so as to pass along the side of the battery module group 60 and extends along the gap between the battery module group 60 and the battery case 21.

The downstream end (not shown) of the second duct member 73 extends to the inside of the battery module group 60 and supplies air to the multiple battery modules 61.

2, the battery pack 20 has a table-shaped base 90 behind the battery module group 60. The base 90 has a flat mounting member 91 on which the blower fan 55 is placed, and a number of leg members 92, 93 that support the mounting member 91. The leg members 92, 93 are connected to the underside of the end of the mounting member 91 in the vehicle width direction and to the underside of the battery case 21. Here, the underside of the battery case 21 refers to the bottom surface on which the battery modules 61, etc. are placed. The mounting member 91 is disposed above the underside of the battery case 21. Therefore, the blower fan 55 is disposed above the underside of the battery case 21.

In this embodiment, the leg members 92, 93 are formed by pressing flat plates. The leg members 92, 93 have main body portions 92A, 93A that extend in the vertical direction and the longitudinal direction of the vehicle. The main body portions 92A, 93A are bent to ensure rigidity, but are generally formed into a flat plate shape. For this reason, the leg members 92, 93 are not easily deformed by vibrations in the longitudinal direction of the vehicle caused by the vehicle traveling. Therefore, the blower fan 55 is not easily vibrated in the longitudinal direction of the vehicle due to the shape of the leg members 92, 93 of the base portion 90 that supports it.

The air duct 70 has a battery case mounting portion 80 (see FIG. 2) or a battery case mounting portion 100 (see FIG. 6), and the battery case mounting portion 80, 100 is fixed to the battery case 21. By fixing the air duct 70 to the battery case 21 at the battery case mounting portion 80, 100, vibration of the air duct 70 can be suppressed, and vibration of the blower fan 55 connected to the air duct 70 can also be suppressed.

In FIG. 2, the battery case mounting portion 80 is provided on the second duct member 73. The battery case mounting portion 80 extends leftward from the second duct member 73 and is fixed to the side wall 42 of the battery case 21. Note that the side wall 42 of the battery case 21 is provided with a fixing portion (not shown in the drawing), and this fixing portion is fixed to the underside of the battery case mounting portion 80. In this way, the second duct member 73 is supported by the battery case 21 at the battery case mounting portion 80.

The battery case mounting portion 80 is fixed to the battery case 21 at a position closer to the mounting member 91 than the end of the battery module 61 adjacent to the mounting member 91 in the vehicle longitudinal direction that is farther from the mounting member 91 in the vehicle longitudinal direction.

In this embodiment, since the battery module 61 is disposed in front of the mounting member 91, the battery case attachment part 80 is fixed to the battery case 21 at a position closer to the mounting member 91 than the front end of the battery module 61. Note that, if the battery module 61 is disposed behind the mounting member 91, the battery case attachment part 80 is fixed to the battery case 21 at a position closer to the mounting member 91 than the rear end of the battery module 61.

The side wall 42 of the battery case 21, which is the fixing portion of the battery case mounting portion 80, is located outside the end of the mounting member 91 in the vehicle width direction. Therefore, the battery case mounting portion 80 is fixed to the battery case 21 at a position outside the end of the mounting member 91 in the vehicle width direction.

In FIG. 6, the battery case mounting portion 100 is provided at the front end of the vehicle width direction extension portion 72A of the intermediate duct member 72. The battery case mounting portion 100 has an extension portion 101 that extends forward from the front end of the vehicle width direction extension portion 72A, and a mounting leg portion 102 that extends downward from the tip of the extension portion 101 in the extension direction.

The lower end of the mounting leg 102 is fixed to the inner surface of the lower case 40 of the battery case 21 at a position between the outermost battery module 61 in the vehicle width direction and the battery module 61 adjacent to this battery module 61 in the vehicle width direction. The attachment position of the mounting leg 102 to the lower case 40 is set within the range of the shaded area B. Area B is the area where the battery module group 60 is arranged, in which the battery modules 61 are arranged adjacent to the front of the mounting member 91 in the vehicle width direction.

The vehicle front-rear direction boundary positions B1 and B2 of area B indicate the front and rear end positions of the battery module group 60, respectively. The vehicle width direction boundary positions B3 and B4 of area B indicate the right and left end positions of the mounting member 91, respectively.

2, the leg members 92 are provided in a pair on the left and right, and are connected to the mounting member 91 and the lower surface of the battery case 21. The leg members 93 are provided in a pair on the left and right behind the leg members 93 in the vehicle front-rear direction, and are connected to the mounting member 91 and the lower surface of the battery case 21. The leg members 92 and 93 constitute the leg members in the present invention. In this embodiment, the leg members 92 and the intermediate duct member 72 are arranged opposite each other in the vehicle width direction. In addition, in a plan view of the vehicle, the bent portion 72B of the intermediate duct member 72 and the leg members 92 are arranged opposite each other in the vehicle up-down direction. In addition, the leg members 92 are arranged below the first duct member 71 in the vehicle up-down direction. In other words, when the leg members 92 are viewed from the vehicle width direction, the leg members 92 and the first duct member 71 overlap each other in the vehicle up-down direction.

In this embodiment, the first duct member 71 and the second duct member 73 are disposed on one end side (front end side) of the mounting member 91 in the vehicle longitudinal direction from the center. Note that, if the mounting posture of the battery pack 20 on the vehicle is reversed from front to rear, the first duct member 71 and the second duct member 73 will be disposed on the rear end side of the mounting member 91 in the vehicle longitudinal direction from the center.

In FIG. 1, a plurality of vehicle body mounts 22, 23, and 24 that support the battery case 21 on the vehicle body 2 are provided on the side of the battery case 21. The vehicle body mounts 22, 23, and 24 are provided in pairs on the left and right.

In FIG. 2, the battery case attachment section 80 and the vehicle body mount section 22 are disposed opposite each other in the vehicle width direction. The vehicle body mount section 22 constitutes the vehicle body mount section in the present invention. On the other hand, the vehicle body mount section 23 is disposed rearward of the battery module group 60 and rearward of the vehicle body mount section 22 in the vehicle front-rear direction. The vehicle body mount section 23 is also disposed in a position opposite the blower fan 55 in the vehicle width direction. The vehicle body mount section 24 (see FIG. 1) is disposed forward of the vehicle body mount section 22 in the vehicle front-rear direction.

In Figures 4 and 5, the bent portion 72B of the intermediate duct member 72 is inclined downward in the vehicle vertical direction toward the front of the vehicle. Therefore, in the vehicle vertical direction, the downstream end of the intermediate duct member 72 is disposed lower than the upstream end of the intermediate duct member 72. Therefore, the second duct member 73 is disposed lower in the vehicle vertical direction than the first duct member 71. Note that the bent portion 72B is not only bent in an L-shape in a plan view, but is also inclined in a side view and has a three-dimensionally bent, solid shape, which increases rigidity in all directions.

In FIG. 5, the curvature R1 of the inner side of the bend 72B in the vehicle width direction is smaller than the curvature R2 of the outer side of the bend 72B in the vehicle width direction. In other words, the curved shape of the inner part of the bend 72B in the vehicle width direction is a gentler curved shape with a larger radius of curvature than the curved shape of the outer part.

In FIG. 2, the downstream end (front end) of the intermediate duct member 72 and the upstream end (rear end) of the second duct member 73 open facing each other in the vehicle width direction. In more detail, the opening 72F at the downstream end of the vehicle longitudinal extension portion 72C of the intermediate duct member 72 opens facing right, and the opening 73B at the upstream end of the second duct member 73 opens facing left.

The duct connection surface 97, which is the connection surface between the opening 72F at the downstream end of the intermediate duct member 72 and the opening 73B at the upstream end of the second duct member 73, extends in the fore-and-aft direction of the vehicle. At the duct connection surface 97, the openings 72F and 73B are connected and joined to each other by fitting of recesses and protrusions.

A pair of fixing parts, an upstream fixing part 82 and a downstream fixing part 81, are provided on both ends of the duct connection surface 97 in the vehicle front-rear direction. The intermediate duct member 72 and the second duct member 73 are fixed to each other by the upstream fixing part 82 and the downstream fixing part 81. When the line connecting the pair of fixing parts is taken as an imaginary line L in a plan view of the vehicle, this imaginary line L intersects with the duct connection surface 97.

The upstream fixing part 82 is provided on the side of the duct connection surface 97 that is farther from the battery case mounting part 80. On the other hand, the downstream fixing part 81 is provided on the side of the duct connection surface 97 that is closer to the battery case mounting part 80. The downstream fixing part 81 is connected to the battery case mounting part 80.

Here, in this embodiment, both the upstream end and the downstream end of the intermediate duct member 72 open to the right. As a result, in the assembly process of assembling the split-structure air duct 70 to the battery case 21, first, the first duct member 71 and the second duct member 73 of the air duct 70 are assembled to the battery case 21, and then the intermediate duct member 72 can be assembled to the battery case 21 by moving it to the right in the vehicle width direction so that it is connected to the first duct member 71 and the second duct member 73. Therefore, simply by moving the intermediate duct member 72 to the right, the intermediate duct member 72 is connected to the first duct member 71 and the second duct member 73, so that the intermediate duct member 72 can be easily and efficiently assembled.

In addition, because both the upstream end and downstream end of the intermediate duct member 72 open to the right, the connection area and connection rigidity between the intermediate duct member 72 and the second duct member 73 at the duct connection surface 97 can be increased compared to when the downstream end of the intermediate duct member 72 opens toward the front of the vehicle. Therefore, the intermediate duct member 72 can be firmly supported by the second duct member 73, improving the rigidity of the intermediate duct member 72 and suppressing vibration of the mounting member 91 and the blower fan 55 supported by the intermediate duct member 72.

In addition, even if the intermediate duct member 72 is displaced inward in the vehicle width direction as a result of the placement member 91 being displaced inward (rightward) in the vehicle width direction, the downstream end of the intermediate duct member 72 is returned to the outside in the vehicle width direction (leftward) by the upstream end of the second duct member 73 via the firmly connected duct connection surface 97. This suppresses displacement of the intermediate duct member 72 in the vehicle width direction, and suppresses vibration of the placement member 91 and the blower fan 55.

As described above, in the vibration suppression structure of the battery pack 20 of this embodiment, the battery pack 20 is disposed above the lower surface of the battery case 21 and includes a base portion 90 having a mounting member 91 on which the blower fan 55 is placed, and leg members 92, 93 connected to the mounting member 91 and the lower surface of the battery case 21 and supporting the mounting member 91. The leg members 92, 93 have main body portions 92A, 93A extending in the vehicle up-down direction and the vehicle front-rear direction. The air duct 70 has a battery case attachment portion 80 fixed to the battery case 21, and this battery case attachment portion 80 is fixed to the battery case 21 at a position closer to the mounting member 91 than the end of the battery module 61 adjacent to the mounting member 91 in the vehicle front-rear direction that is farther from the mounting member 91 in the vehicle front-rear direction.

In this way, in this embodiment, the leg members 92, 93 of the base portion 90 have main body portions 92A, 93A that extend in the fore-and-aft direction of the vehicle, so that the main body portions 92A, 93A can bear the vibrations in the fore-and-aft direction of the vehicle, and the leg members 92, 93 can be prevented from vibrating and deforming in the fore-and-aft direction of the vehicle.

Furthermore, the battery case mounting portion 80 of the air supply duct 70 is fixed to the battery case 21 at a position closer to the mounting member 91 than the end of the battery module 61 adjacent to the mounting member 91 in the vehicle longitudinal direction that is farther from the mounting member 91 in the vehicle longitudinal direction. This makes it possible to shorten the distance between the mounting member 91 and the battery case mounting portion 80, and to suppress vibration of the base portion 90 and the air supply fan 55 fixed to the base portion 90 without providing a new reinforcing member.

As a result, vibration of the blower fan 55 can be suppressed without increasing the weight of the battery pack 20.

In addition, in the vibration suppression structure for the battery pack 20 of this embodiment, the battery case mounting portion 100 is fixed to the battery case 21 at a position closer to the center than the end of the mounting member 91 in the vehicle width direction.

This allows the battery case mounting portion 100 to be positioned close to the mounting member 91 in the vehicle width direction, making it easier to suppress vibration of the base portion 90.

In addition, in the vibration suppression structure for the battery pack 20 of this embodiment, the battery case mounting portion 80 is fixed to the battery case 21 at a position outside the end of the mounting member 91 in the vehicle width direction.

As a result, when the base portion 90 vibrates and the mounting member 91 is displaced in the vehicle width direction, the air duct 70 around the battery case mounting portion 80 elastically deforms in the tensile or compressive direction, and the restoring force acts to return the mounting member 91 to its original position, preventing the base portion 90 from vibrating significantly.

In addition, in the vibration suppression structure of the battery pack 20 of this embodiment, the air duct 70 has a first duct member 71 that extends in at least one direction of the vehicle width, and the leg member 92 is disposed below the first duct member 71 in the vehicle up-down direction.

As a result, the first duct member 71 is less likely to deform in the vehicle width direction by extending in the vehicle width direction, and displacement of the blower fan 55 connected to the first duct member 71 in the vehicle width direction can be effectively suppressed.

In addition, because the leg member 92 is disposed below the first duct member 71, the leg member 92 and the first duct member 71 are disposed in close proximity to each other, so deformation of the leg member 92 in the vehicle width direction can be effectively suppressed.

In addition, in the vibration suppression structure of the battery pack 20 of this embodiment, the first duct member 71 extends in both directions in the vehicle width direction.

This allows the battery case mounting parts 80 to be arranged on both ends of the first duct member 71, which extends in both directions in the vehicle width direction. Therefore, the load caused by the vibration of the blower fan 55 in the vehicle width direction can be applied to the first duct member 71 as a compressive load and a tensile load, which further restricts the blower fan 55 from vibrating and displacing in the vehicle width direction.

In addition, in the vibration suppression structure of the battery pack 20 of this embodiment, the air supply duct 70 has a second duct member 73 extending in the vehicle front-rear direction and an intermediate duct member 72 connected to the first duct member 71 and the second duct member 73, and the second duct member 73 has a battery case mounting portion 80. The leg member 92 and the intermediate duct member 72 are arranged opposite each other in the vehicle width direction.

As a result, the intermediate duct member 72, which is connected to the first duct member 71 and the second duct member 73, which extend in different directions, has a curved shape, which increases its rigidity. Furthermore, since the intermediate duct member 72, which has high rigidity, faces the leg member 92 in the vehicle width direction, it is possible to suppress vibration of the leg member 92 in the vehicle width direction, and therefore vibration of the blower fan 55 in the vehicle width direction.

The vibration suppression structure for the battery pack 20 in this embodiment also includes a vehicle body mount 22 that supports the battery case 21 on the vehicle body, and the battery case attachment portion 80 and the vehicle body mount 22 are disposed opposite each other in the vehicle width direction.

As a result, the battery case 21 at that portion is reinforced by the vehicle body mount portion 22, which has high rigidity for mounting the battery case 21 to the vehicle body. The battery case mounting portion 80 of the air duct 70 is then fixed to this reinforced portion, so that vibration of the air fan 55 in the vehicle width direction can be further suppressed.

In the vibration suppression structure of the battery pack 20 of this embodiment, the intermediate duct member 72 has a vehicle width direction extension portion 72A that extends in the vehicle width direction and is connected to the first duct member 71, a vehicle front-rear direction extension portion 72C that extends in the vehicle front-rear direction and is connected to the second duct member 73, and a bent portion 72B that is bent so as to communicate with the vehicle width direction extension portion 72A and the vehicle front-rear direction extension portion 72C. In addition, the curvature R1 of the bent portion 72B on the inner side in the vehicle width direction is smaller than the curvature R2 of the bent portion 72B on the outer side in the vehicle width direction.

This makes it harder for the intermediate duct member 72 to bend, further suppressing vibration of the blower fan 55.

In addition, in the vibration suppression structure of the battery pack 20 of this embodiment, the first duct member 71 and the second duct member 73 are positioned closer to one end than the center of the mounting member 91 in the vehicle front-rear direction.

This allows the first duct member 71 and the second duct member 73 to be positioned closer to each other on one end side of the mounting member 91 than the center in the vehicle longitudinal direction. Therefore, the first duct member 71 connected to the blower fan 55 and the second duct member 73 having the battery case mounting portion 80 can be positioned closer to each other in the vehicle longitudinal direction, and vibration of the blower fan 55 can be further suppressed.

Although an embodiment of the present invention has been disclosed, it is apparent that modifications may be made by one of ordinary skill in the art without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

1...vehicle, 20...battery pack, 21...battery case, 22...vehicle body mount, 55...blower fan, 61, 62...battery module, 70...blower duct, 71...first duct member, 72...intermediate duct member, 72A...vehicle width direction extension portion, 72B...bent portion, 72C...vehicle front-rear direction extension portion, 73...second duct member, 80, 100...battery case mounting portion, 90...base portion, 91...mounting member, 92, 93...leg member, 92A, 93A...main body portion, R1, R2...curvature

Claims (8)

A battery module;
a blower duct connected to the blower fan and configured to send air from the blower fan to the battery module;
a battery case that houses the blower fan, the battery module, and the blower duct and is mounted on a vehicle,
a base portion including a mounting member disposed above a bottom surface of the battery case and on which the blower fan is mounted, and a leg member connected to the mounting member and the bottom surface of the battery case and supporting the mounting member,
The leg member has a main body portion extending in a vehicle up-down direction and a vehicle front-rear direction,
the air blower duct has a battery case attachment portion fixed to the battery case,
A vibration suppression structure for a battery pack, characterized in that the battery case mounting portion is fixed to the battery case at a position closer to the mounting member than the end of the battery module adjacent to the mounting member in the vehicle fore-and-aft direction that is farther from the mounting member in the vehicle fore-and-aft direction, and at a position closer to the center than the end of the mounting member in the vehicle width direction . A battery module;
a blower duct connected to the blower fan and configured to send air from the blower fan to the battery module;
a battery case that houses the blower fan, the battery module, and the blower duct and is mounted on a vehicle,
a base portion including a mounting member disposed above a bottom surface of the battery case and on which the blower fan is mounted, and a leg member connected to the mounting member and the bottom surface of the battery case and supporting the mounting member,
The leg member has a main body portion extending in a vehicle up-down direction and a vehicle front-rear direction,
The air blower duct has a battery case mounting portion fixed to the battery case and a first duct member extending in at least one vehicle width direction,
the battery case attachment portion is fixed to the battery case at a position closer to the mounting member than an end portion of the battery module adjacent to the mounting member in the vehicle front-rear direction that is farther from the mounting member in the vehicle front-rear direction,
A vibration suppression structure for a battery pack , wherein the first duct member extends in both directions in a vehicle width direction . 3. The vibration suppression structure for a battery pack according to claim 2, wherein the battery case attachment portion is fixed to the battery case at a position outside an end of the mounting member in a vehicle width direction. 4. The vibration suppression structure for a battery pack according to claim 2 , wherein the leg member is disposed below the first duct member in the vertical direction of the vehicle. The air blower duct includes a second duct member extending in a vehicle front-rear direction, and an intermediate duct member connected to the first duct member and the second duct member,
the second duct member has the battery case mounting portion,
5. The vibration suppression structure for a battery pack according to claim 4 , wherein the leg member and the intermediate duct member are disposed opposite each other in a vehicle width direction. a vehicle body mount portion that supports the battery case on a vehicle body;
6. The vibration suppression structure for a battery pack according to claim 2, wherein the battery case attachment portion and the vehicle body mount portion are disposed opposite each other in a vehicle width direction . the intermediate duct member has a vehicle width direction extending portion extending in a vehicle width direction and connected to the first duct member, a vehicle front-rear direction extending portion extending in a vehicle front-rear direction and connected to the second duct member, and a bent portion bent so as to communicate with the vehicle width direction extending portion and the vehicle front-rear direction extending portion,
6. The vibration suppression structure for a battery pack according to claim 5, wherein a curvature of an inner side of the bent portion in the vehicle width direction is smaller than a curvature of an outer side of the bent portion in the vehicle width direction. 8. The vibration suppression structure for a battery pack according to claim 5, wherein the first duct member and the second duct member are arranged closer to one end side than to a center of the mounting member in the vehicle longitudinal direction .

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