JP2019192431A - Power storage device loading structure - Google Patents

Abstract

To provide a loading structure of power storage device capable of restraining wetting of an electronic component installed on the outside of a housing case, by using a member provided in a vehicle.SOLUTION: A fixing structure 100 of power storage device includes a power storage device including a power storage module, and a housing case for receiving the power storage module internally, a floor member where the housing case is placed on the upper side, and a vertical wall part 70 placed to face at least the front 31 of the housing case 30. The power storage device 10 includes an electric component 40 placed on the outer surface of the housing case so as to face the vertical wall part 70. The floor member 60 is provided with a protrusion 62 protruding upward from the top face of the floor member 60, so as to overlap the electric component 40 when viewing from above, or to be located in the rear of the electric component 40.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a mounting structure of a power storage device.

  As a document disclosing a vehicle on which a conventional battery pack (power storage device) is mounted, for example, Japanese Patent Laying-Open No. 2015-137909 (Patent Document 1) is cited. In a vehicle on which the battery pack disclosed in Patent Document 1 is mounted, a waterproof tray is provided between the floor panel and the battery pack in order to suppress water exposure of the battery pack.

Japanese Patent Laying-Open No. 2015-137090

  However, when the waterproof tray is provided between the floor panel and the battery pack as in the configuration disclosed in Patent Document 1, the number of parts increases, so that the manufacturing cost of the waterproof tray and the weight of the vehicle increase. .

  The battery pack is provided with an electrical component to which a voltage is applied outside the housing case that houses the assembled battery. If the electrical component gets wet, the battery pack may have a problem.

  The present disclosure has been made in view of the above problems, and an object of the present disclosure is to suppress water exposure of electrical components installed on the outer surface of the housing case using a member provided in the vehicle. An object of the present invention is to provide a mounting structure of a power storage device that can be used.

  A power storage device according to the present disclosure is at least opposed to a power storage device including a power storage module and a storage case that stores the power storage module therein, a floor member on which the storage case is disposed above, and a front surface of the storage case. And a vertical wall portion arranged as described above. The power storage device includes an electrical component disposed on the outer surface of the housing case so as to face the vertical wall portion. The floor member is provided with a protruding portion that protrudes upward from the upper surface of the floor member so as to overlap the electrical component when viewed from above or to be positioned behind the electrical component. Yes.

  Generally, a liquid such as water that has entered from the lower side of the floor member and / or the vehicle interior side may remain on the floor member on which the power storage module is disposed. In this case, when the speed of the vehicle suddenly fluctuates, the liquid staying on the floor member may move and move toward the vertical wall portion provided to face the front surface of the housing case. is there.

  Here, in the mounting structure of the power storage device having the above configuration, the floor member overlaps with an electrical component disposed on the outer surface of the housing case so as to face the vertical wall portion when viewed from above or A protrusion is provided on the upper surface of the floor member so as to be located behind the electrical component.

  For this reason, when viewed from above, below or behind the electrical component, the flow direction of the liquid moving toward the vertical wall is changed so as to avoid the electrical component. Thereby, it can suppress that the liquid which collided with the vertical wall part rebounds toward an electrical component. As a result, the flooding of the electrical components installed on the outer surface of the housing case can be suppressed using the protrusions of the floor member provided in the vehicle.

  According to the present disclosure, it is possible to provide a mounting structure for a power storage device that can suppress water exposure of electrical components disposed on an outer surface of a storage case using a member provided in a vehicle.

1 is a schematic perspective view showing a battery pack mounting structure according to Embodiment 1. FIG. 1 is a schematic plan view showing a battery pack mounting structure according to Embodiment 1. FIG. 1 is a schematic cross-sectional view showing a battery pack mounting structure according to Embodiment 1. FIG. FIG. 4 is a diagram showing the movement of liquid on the floor member in the battery pack mounting structure according to Embodiment 1. It is a schematic sectional drawing which shows the mounting structure of the battery pack in a comparative example. FIG. 10 is a diagram showing the movement of liquid on the floor member in the battery pack mounting structure according to Embodiment 2. FIG. 10 is a diagram showing the movement of liquid on the floor member in the battery pack mounting structure according to Embodiment 3. FIG. 10 is a diagram showing the movement of liquid on a floor member in the battery pack mounting structure according to Embodiment 4. FIG. 10 is a diagram showing the movement of liquid on a floor member in the battery pack mounting structure according to Embodiment 5. FIG. 10 is a diagram showing the movement of liquid on a floor member in the battery pack mounting structure according to Embodiment 6.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiment described below, a battery pack is exemplified as a power storage device, and a battery pack mounting structure is illustrated as an example of a mounting structure of the power storage device. In the embodiments described below, the same or common portions are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
1 is a schematic perspective view showing a battery pack mounting structure according to Embodiment 1. FIG. FIG. 2 is a schematic plan view showing the battery pack mounting structure according to the first embodiment. In FIG. 2, the battery pack is indicated by a one-dot chain line for the sake of convenience so that a configuration of a later-described floor member positioned below the battery pack can be seen. FIG. 3 is a schematic cross-sectional view showing the mounting structure of the battery pack according to the first embodiment. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. In FIG. 3, for convenience, a circuit board C arranged in a battery pack housing case described later is indicated by a broken line. A battery pack mounting structure 100 according to Embodiment 1 will be described with reference to FIGS. 1 to 3.

  The battery pack mounting structure 100 can be applied to a hybrid vehicle using an engine and a motor generator (both not shown) as power sources. The battery pack mounting structure 100 can also be applied to an electric vehicle that does not include an engine (internal combustion engine).

  As shown in FIGS. 1 and 2, the vehicle 1 to which the battery pack mounting structure 100 is applied includes a pair of left and right side members 2, 3, a front cross member 4, a rear cross member 5, a floor member 60, and a vertical wall portion. As a trim 70 and a battery pack 10 as a power storage device.

  The pair of left and right side members 2 and 3 extend in the front-rear direction of the vehicle. The pair of side members 2 and 3 are arranged on the left and right sides in the vehicle width direction.

  The front cross member 4 and the rear cross member 5 extend in the width direction of the vehicle and connect the pair of side members 2 and 3. The front cross member 4 is located on the front side of the vehicle with respect to the rear cross member 5. The front cross member 4 is located below the rear cross member 5. A front side of the rear seat 90 (see FIG. 3) is disposed above the front cross member 4.

  The floor member 60 is disposed on the pair of side members 2 and 3. Floor member 60 forms a floor surface in the vehicle compartment. Floor member 60 includes, for example, a floor panel and a floor silencer arranged on the floor panel. The floor member 60 is provided from the front cross member 4 to the rear cross member 5 so as to curve upward as it goes to the rear side of the vehicle. Floor member 60 has an upper surface 60a. The upper surface 60a is located on the battery pack 10 side.

  The battery pack 10 mainly includes an assembled battery 20 as a power storage module, a housing case 30 and an electrical component 40. The assembled battery 20 has a plurality of single cells. The plurality of single cells are electrically connected in series, for example.

  The cell is a secondary battery such as a nickel metal hydride battery or a lithium ion battery. The unit cell has, for example, a square shape. The single cell is not limited to a square shape, and may be a cylindrical shape. The secondary battery may use a liquid electrolyte, or may use a solid electrolyte.

  The housing case 30 houses the assembled battery 20 therein. The housing case 30 is disposed above the floor member 60. The housing case 30 has an attachment portion (not shown) for attachment to the floor member 60. The housing portion 30 is fixed to the vehicle by fixing the mounting portion to the floor member 60 or the like by a fastening member (not shown).

  The housing case 30 has, for example, a front surface 31 and a rear surface 32 that face each other in the front-rear direction, a pair of side surfaces 33 and 34 that face each other in the left-right direction, and an upper surface and a lower surface that face each other in the vertical direction. The lower surface of the housing case 30 faces the upper surface 60 a of the floor member 60.

  The storage case 30 is fixed to the vehicle so that the direction in which the front surface 31 and the rear surface 32 face each other (the front-rear direction of the storage case) matches the front-rear direction of the vehicle.

  The electrical component 40 is, for example, a connector or the like, and is a component to which a high voltage and / or a low voltage is applied. For example, the electrical component 40 is electrically connected to the circuit board C disposed in the housing case 30. The circuit board C is electrically connected to the assembled battery 20 by wiring or the like.

  The electrical component 40 is provided so as to be exposed to the outside of the housing case 30. The electrical component 40 is disposed on the outer surface of the housing case 30. For example, the electrical component 40 is disposed on the left side surface 33 of the housing case 30.

  The electrical component 40 is disposed so as to face the trim 70. Specifically, the electrical component 40 is disposed so as to face the trim 70 of the portion located on the front side of the housing case 30.

  The trim 70 is disposed below the rear seat 90. Trim 70 extends mainly along the width direction of the vehicle. The trim 70 is disposed so as to face at least the front surface 31 of the housing case 30. More specifically, the trim 70 is provided so as to surround the front surface 31 and the pair of side surfaces 33 and 34 of the housing case 30. A gap is provided between the trim 70 and the housing case 30.

  The trim 70 has a first portion 71, a second portion 72, and a third portion 73. The first portion 71 faces the front surface 31 of the storage case 30. The first portion 71 extends along the width direction of the vehicle. The second portion 72 faces the corner 33 on the left front side of the storage case 30 from the side surface 33 of the storage case 30. The second portion 72 is bent toward the rear side of the vehicle as it goes outward in the width direction of the vehicle. The third portion 73 faces the corner portion on the right front side of the housing case 30 from the side surface 34 of the housing case 30. The third portion 73 is bent toward the rear side of the vehicle as it goes outward in the width direction of the vehicle.

  As shown in FIGS. 2 and 3, the floor member 60 is provided with a recess 61 and a protrusion 62. The recess 61 is formed by a part of the upper surface 60a being recessed downward. The recess 61 extends in the width direction of the vehicle. The recess 61 is located below the storage case 30.

  A liquid L such as water may enter the space above the floor silencer on which the battery pack 10 is mounted from the floor member 60 side below the battery pack 10 and the vehicle interior side. In this case, the liquid L is stored in the recess 61.

  The protrusion 62 protrudes upward from the upper surface 60a of the floor member 60 so as to overlap the electrical component 40 when viewed from above. Specifically, the protrusion 62 protrudes upward from a horizontal plane to which the upper end of the recess 61 located on the front side is added.

  FIG. 4 is a diagram showing the movement of the liquid on the floor member in the battery pack mounting structure according to the first embodiment. The movement of the liquid on the floor member 60 will be described with reference to FIG.

  As shown in FIG. 4, the protrusion 62 has a substantially triangular shape in plan view. More specifically, the protrusion 62 has an inclined side 62a that inclines toward the left side of the vehicle as it goes toward the front side of the vehicle when viewed from above. When viewed from above, the protrusion 62 has a vertex P1 located on the rear side of the vehicle and two vertexes P2 and P3 located on the front side of the vehicle with respect to the vertex P1.

  When the vehicle is suddenly braked in a state where the liquid is stored in the recess 61, the liquid moves forward along the direction of the arrow AR1 by the inertial force, as shown in FIGS. The flow direction of the liquid moving along the arrow AR1 direction is changed by the protrusion 62 so as to avoid the electrical component 40. Specifically, the flow direction of the liquid moving along the arrow AR1 direction is the side connecting the apex portion P1 and the apex portion P3 to the one moving in the arrow AR2 direction along the inclined side 62a of the protrusion 62. Along the arrow AR3.

  Thus, when the liquid flow direction is changed below the electrical component 40 so as to avoid the electrical component 40 when viewed from above, the moved liquid collides with the trim 70 as the vertical wall portion, It is possible to prevent the electric component 40 from bouncing back. As a result, the flooding of the electrical component 40 installed on the outer surface of the housing case 30 can be suppressed using the protrusions 62 of the floor member 60 provided in the vehicle.

(Comparative example)
FIG. 5 is a schematic cross-sectional view showing a battery pack mounting structure in a comparative example. With reference to FIG. 5, a battery pack mounting structure 100X in a comparative example will be described.

  As shown in FIG. 5, the battery pack mounting structure 100 </ b> X in the comparative example has the protrusion 62 according to the first embodiment of the floor member 60 when compared with the battery pack mounting structure 100 according to the first embodiment. The difference is that the upper surface 60a is not provided. Other configurations are almost the same.

  Also in the comparative example, when the vehicle is suddenly braked in the state where the liquid is stored in the recess 61, the liquid moves forward along the direction of the arrow AR1 by the inertial force. In the comparative example, since the protrusion 62 is not provided on the upper surface 60a of the floor member 60, the liquid that moves forward along the direction of the arrow AR1 passes under the electrical component 40 and is on the front side of the electrical component 40. It collides with the trim 70 located in the position.

  The liquid that has collided with the trim 70 located on the front side of the electrical component 40 is bounced back. At this time, a part of the rebounded liquid is scattered on the upper side, and the electric component 40 is wetted.

(Embodiment 2)
FIG. 6 is a diagram showing the movement of the liquid on the floor member in the battery pack mounting structure according to the second embodiment. A battery pack mounting structure 100A according to Embodiment 2 will be described with reference to FIG.

  As shown in FIG. 6, the battery pack mounting structure 100 </ b> A according to the second embodiment differs in the positional relationship between the electrical component 40 and the protrusion 62 when compared with the battery pack 10 according to the first embodiment. . Other configurations are almost the same.

  In the second embodiment, the protrusion 62 is located behind the electrical component 40 when viewed from above. The protrusion 62 is configured such that the liquid whose direction of flow is changed by the protrusion 62 along the inclined side 62a and collides with the trim 70 is bounced back toward the outside in the width direction of the vehicle. .

  By configuring the protrusions 62 in this way, the wetness of the electrical component 40 can be suppressed as in the first embodiment.

(Embodiment 3)
FIG. 7 is a diagram illustrating the movement of the liquid on the floor member in the battery pack mounting structure according to the third embodiment. A battery pack mounting structure 100B according to Embodiment 3 will be described with reference to FIG.

  As shown in FIG. 7, the battery pack mounting structure 100 </ b> B according to the third embodiment has a positional relationship between the electrical component 40 and the protrusion 62 when compared with the battery pack mounting structure 100 according to the first embodiment. Is different. Other configurations are almost the same.

  In the third embodiment, the protrusion 62 is located behind the electrical component 40 when viewed from above. The inclined side 62 a of the protrusion 62 is provided to be orthogonal to the inner surface of the second portion 72 of the trim 70. That is, the protrusion 62 is repelled so that the liquid whose direction of flow is changed by the protrusion 62 along the inclined side 62a and collides with the second portion 72 of the trim 70 returns to the flowing direction. ,It is configured.

  By configuring the protrusions 62 in this way, the wetness of the electrical component 40 can be suppressed as in the first embodiment.

(Embodiment 4)
FIG. 8 is a diagram illustrating the movement of the liquid on the floor member in the battery pack mounting structure according to the fourth embodiment. With reference to FIG. 8, a battery pack mounting structure 100C according to the fourth embodiment will be described.

  As shown in FIG. 8, the battery pack mounting structure 100 </ b> C according to the fourth embodiment has a positional relationship between the electrical component 40 and the protrusion 62 when compared with the battery pack mounting structure 100 according to the first embodiment. Is different. Other configurations are almost the same.

  In the fourth embodiment, the protrusion 62 is located behind the electrical component 40 when viewed from above. Also in the fourth embodiment, as in the third embodiment, the inclined side 62 a of the protrusion 62 is provided to be orthogonal to the inner surface of the second portion 72 of the trim 70. In this case, the apex angle θ1 at the apex portion P1 is larger than that in the third embodiment, and the smaller intersection angle θ2 (inclination angle) of the second portion 72 with respect to the longitudinal direction of the vehicle is Compared to the third mode, it is smaller.

  Even in the case where the protrusion 62 is configured as described above, it is possible to suppress water exposure of the electrical component 40 as in the first embodiment.

(Embodiment 5)
FIG. 9 is a diagram showing the movement of the liquid on the floor member in the battery pack mounting structure according to the fifth embodiment. A battery pack mounting structure 100D according to the fifth embodiment will be described with reference to FIG.

  As shown in FIG. 9, the battery pack mounting structure 100 </ b> D according to the fifth embodiment is different in the positional relationship between the electrical component 40 and the protrusion 62 when compared with the battery pack 10 according to the first embodiment. . Other configurations are almost the same.

  In the fifth embodiment, the protrusion 62 is located behind the electrical component 40 when viewed from above. The protrusion 62 has a liquid whose direction of flow has been changed by the protrusion 62 so as to follow the inclined side 62a and collides with the trim 70 on the front side of the electrical component 40 when viewed from above. It is configured to pass through the side.

  By configuring the protrusions 62 in this way, the wetness of the electrical component 40 can be suppressed as in the first embodiment.

(Embodiment 6)
FIG. 10 is a diagram showing the movement of the liquid on the floor member in the battery pack mounting structure according to the sixth embodiment. A battery pack mounting structure 100E according to Embodiment 6 will be described with reference to FIG.

  As shown in FIG. 10, the battery pack mounting structure 100E according to the sixth embodiment has a positional relationship between the electrical component 40 and the protrusion 62 when compared with the battery pack mounting structure according to the first embodiment. Is different. Other configurations are almost the same.

  In the sixth embodiment, the protrusion 62 is located behind the electrical component 40 when viewed from above. The protrusion 62 is electrically connected to the protrusion 62 on the front side of the protrusion 62 when the liquid that has collided with the trim 70 by changing the flow direction along the inclined side 62a by the protrusion 62 is viewed from above. It is configured to pass between the parts 40.

  By configuring the protrusions 62 in this way, the wetness of the electrical component 40 can be suppressed as in the first embodiment.

  In Embodiments 1 to 6 described above, the case where the battery pack 10 includes a single assembled battery 20 has been described as an example. However, the number of the assembled batteries 20 is not limited to one, and may be plural.

  In Embodiments 1 to 6 described above, the direction in which the front surface 31 and the rear surface 32 of the storage case 30 face each other (the front-rear direction of the storage case) is described as an example. The present invention is not limited to this, and may be parallel to the left-right direction of the vehicle without departing from the spirit of the present invention. In this case, when the electrical component is arranged on the front surface 31 or the rear surface 32 of the housing case 30, the flow of the liquid that moves in the left-right direction on the floor member 60 is divided by the protrusions 62. Similarly to the above, it is possible to suppress water exposure of the electrical components.

  Further, the front surface 31 of the housing case 30 may be disposed so as to face the rear side of the vehicle. In this case, the liquid moves rearward due to a sudden start of the vehicle. In this case, the liquid flowing direction is changed by the protrusion 62, so that the wetness of the electrical component 40 can be suppressed as described above.

  In the first to sixth embodiments described above, the concave member 61 is provided in the floor member 60 and the liquid is stored in the concave member 61. However, the present invention is not limited to this. As long as the upper surface 60a of the member 60 can remain, the concave portion 61 may not be provided.

  In the first to sixth embodiments described above, the case where the vertical wall portion is configured by the trim 70 has been described as an example. However, the present invention is not limited to this, and the liquid remaining on the upper surface of the floor member 60 can be rebounded. In addition, as long as the housing case 20 is disposed so as to face the front surface, the housing case 20 may be constituted by another member included in the vehicle.

  In the first to sixth embodiments described above, the case where the power storage device is the battery pack 10 including the assembled battery 20 has been described as an example. However, the power storage module is not limited to the assembled battery 20 and can store power, such as a capacitor. Anything provided can be adopted as appropriate. The battery pack mounting structure 100 for fixing the battery pack 10 can be adopted as the mounting structure of the power storage device for fixing the power storage device.

  As described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  1 vehicle, 2, 3 side member, 4 front cross member, 5 rear cross member, 10 battery pack, 20 assembled battery, 30 housing case, 31 front surface, 32 rear surface, 33, 34 side surface, 40 electrical component, 60 floor member, 60a upper surface, 61 concave portion, 62 protrusion, 62a inclined side, 70 trim, 71 first portion, 72 second portion, 73 third portion, 90 rear seat, 100, 100A, 100B, 100C, 100D, 100E, 100X battery pack Mounting structure.

Claims (1)

A power storage device including a power storage module and a storage case that stores the power storage module therein,
A floor member on which the housing case is disposed; and
A vertical wall portion disposed so as to face at least the front surface of the housing case,
The power storage device includes an electrical component disposed on the outer surface of the housing case so as to face the vertical wall portion,
The floor member is provided with a protruding portion that protrudes upward from the upper surface of the floor member so as to overlap the electric component when viewed from above or to be positioned behind the electric component. The mounting structure of the power storage device.

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