CN217892495U - Battery packaging body mounting structure - Google Patents

Abstract

The utility model provides a battery packaging body carries on structure, it can reduce to the influence in garage space, and can ensure the space of configuration part in the below of floor portion. In the battery pack mounting structure (20), a battery pack (50) is mounted above a rear floor panel (14). The battery package is provided with a battery module (56), an electrical component (57), and a cooling fan. The battery module is disposed to extend in the vehicle width direction. The electrical installation part controls the battery module. The cooling fan cools the battery module and the electrical installation components. The battery pack is formed so as to be recessed upward along the floor panel so that the thickness in the vertical direction becomes thinner toward the front of the vehicle.

Description

Battery packaging body mounting structure

Technical Field

The utility model relates to a battery packaging body carries on structure.

Background

In recent years, from the viewpoint of adverse effects on the global environment, for example, CO is realized by mounting a battery package on a vehicle and electrically powering the battery package ₂ The technology for reducing the environmental load such as the reduction of the discharge amount has been put into practical use.

Here, as a battery pack mounting structure to be mounted on a vehicle, a technology is known in which a battery pack is mounted under a front seat (first-row seat) (see, for example, patent document 1). As a conventional battery pack mounting structure, a technology of mounting a battery pack in a luggage room (vehicle compartment) is known (for example, see two patent documents 2).

In these battery pack mounting structures, for example, the battery pack is formed in a substantially rectangular parallelepiped, and the component group is laid out (arranged) in the battery pack. The component group includes, for example, a battery module for a high-voltage system device (hereinafter, also referred to as a battery module), a cooling fan, a Control Unit (ECU), an air duct, and the like. That is, in the battery pack, the battery module for high-voltage system equipment and the control equipment are integrally formed.

[ Prior Art document ]

[ patent document ]

[ patent document 1 ] International publication No. 2017/110138

[ patent document 2 ] International publication No. 2016/125388

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

Here, to further drive the CO ₂ For example, it is desired to electrically drive a small vehicle (hereinafter, also referred to as a small vehicle) having an indoor space such as a light vehicle or a super-small vehicle. In this case, for example, it is conceivable to mount a battery package having a conventional size and shape, which includes a battery module for high-voltage equipment, in a luggage room. Therefore, the floor portion of the vehicle interior becomes high, and the influence on the space of the vehicle interior (hereinafter, also referred to as the vehicle interior space) becomes large.

In this way, it is considered that, when the influence on the vehicle interior space becomes large, for example, the change of the posture of the rear seat (second-row seat) is restricted. Examples of the change in posture of the rear seat include a sliding movement of the seat, a reclining movement of the seat back, and a dive down movement of the seat for leveling the rear seat and the floor.

In this way, it is considered that, in particular, convenience and habitability are restricted by motorization of small-sized vehicles. Therefore, it is desired to put the vehicle into practical use, improve convenience, and ensure an improvement in the occupancy of the vehicle.

In addition, even when a small-sized vehicle is electrically driven, it is difficult to secure a space (space) for disposing (arranging) components below a floor portion (floor), and practical use of the technology is desired from this viewpoint.

An object of the utility model is to provide a can reduce the influence to the garage space, and can ensure the battery packaging body mounting structure who disposes the space of part in the below of floor portion.

Means for solving the problems

In order to solve the above problem, the present invention proposes the following.

(1) The present invention relates to a battery pack mounting structure in which a battery pack (for example, a battery pack 50 of an embodiment) of a battery pack mounting structure (for example, a battery pack mounting structure 20 of an embodiment) is mounted from above on a concave portion (for example, a floor storage concave portion 19 of an embodiment) formed on a floor (for example, a rear floor 14 of an embodiment), the battery pack including: a battery module (for example, the battery module 56 of the embodiment) that is disposed so as to extend in the vehicle width direction; at least one electrical mounting component (e.g., electrical mounting component 57 of an embodiment) that controls the battery module; and a cooling fan (e.g., cooling fan 58 of the embodiment) that cools the battery module and the electrical components, and the battery package is formed so as to be recessed upward along the floor panel so that the thickness in the vertical direction becomes thinner toward the vehicle front.

According to this configuration, the battery pack (specifically, the bottom surface) is formed so as to be recessed upward along the floor panel as it goes toward the vehicle front, and the thickness of the battery pack is made thinner as it goes toward the vehicle front. Therefore, the height of the battery pack (specifically, the upper surface) can be adjusted. This can reduce the influence on the vehicle interior space by suppressing the height of the battery pack, and can ensure an improvement in the occupancy of the vehicle.

Further, by forming the battery pack so as to be recessed upward, the floor panel (i.e., the floor portion) can be formed so as to protrude upward as it goes toward the vehicle front. This can ensure a space for disposing components (hereinafter, also referred to as a disposition space) below the floor.

Here, as the electrical components provided in the battery module, a high-voltage junction box, a battery ECU, a DC/DC converter, and the like can be given.

The high-voltage terminal block is, for example, a device for supplying electric power of a battery module for driving, which is housed in a battery pack, to a motor for driving. The battery ECU is, for example, a battery management unit that controls discharge and charge between a battery module for driving and a motor for driving. The DC/DC converter is a device that converts a voltage into a voltage that enables each electronic device provided in the battery pack to operate, and stabilizes the converted voltage.

Examples of the member disposed under the floor include a cross member and a power transmission device.

(2) The battery pack may include a middle step portion (for example, a pack middle step portion 84 according to the embodiment) that is thinner in the vertical direction than a rear step portion (for example, a battery housing portion 62 according to the embodiment) at the vehicle rear side of the battery pack, and a cross member (for example, a first rear cross member 15 according to the embodiment) extending in the vehicle width direction may be disposed below the middle step portion.

According to this structure, the thickness of the middle step portion is made thinner than that of the rear step portion in the battery pack. Therefore, a space in which the rear cross member can be disposed can be secured below the middle step portion (battery package) without protruding the middle step portion toward the vehicle compartment side. A cross member is disposed in the space.

Thus, the influence of the cross member on the vehicle interior space can be reduced, and the battery pack can be suitably protected by the cross member.

(3) A power transmission device (for example, the power transmission device 18 of the embodiment) may be disposed below the cross member.

According to this structure, the thickness of the middle step portion of the battery pack is formed to be thin. Therefore, the vehicle interior space can be ensured, and the space (arrangement space) below the floor can also be ensured to be wide. This allows the power transmission device to be disposed in a space below the floor.

Therefore, for example, when the battery pack is mounted on the rear side of the vehicle, the battery pack mounting structure can be applied to a vehicle that performs four-wheel drive by disposing the power transmission device for rear wheel drive in a space below the floor panel.

(4) The battery module may be housed in a vehicle rear side of the battery package, and the electrical component may be overlapped with the battery module when viewed in a vehicle front-rear direction, and may have a thickness in a vertical direction smaller than that of the battery module.

According to this configuration, the electrical component is overlapped (superposed) on the battery module when viewed from the front-rear direction of the vehicle, and the thickness of the electrical component is made thinner than that of the battery module.

Here, the floor is formed to protrude upward as going toward the vehicle front. Therefore, by making the thickness of the electrical components thinner than the battery module, the battery package is horizontally arranged in a state where the battery package is arranged along the floor panel. This can reduce the influence on the vehicle interior space by suppressing the height of the battery pack, and can ensure an improvement in the occupancy of the vehicle.

(5) The battery package may include: an inflow portion (e.g., an inflow portion 63 according to an embodiment) that houses the electrical components (e.g., a battery ECU91 according to an embodiment, a high-voltage junction box 92) in a state of being disposed so as to extend toward the front of the vehicle, and into which a fluid flows; and an outflow portion (for example, an outflow portion 64 of an embodiment) that communicates with the inflow portion, the outflow portion housing the electrical component (for example, a DC/DC converter 93 of an embodiment) in a state of being disposed so as to extend toward a vehicle front side, and that discharges a fluid from an interior of the outflow portion, the inflow portion having a first opening portion (for example, a first opening portion 81 of an embodiment) formed at a front end portion of the vehicle front side for communicating an interior of the inflow portion with a vehicle interior (for example, a vehicle interior 38 of an embodiment), the outflow portion having a second opening portion (for example, a second opening portion 82 of an embodiment) formed at the front end portion of the vehicle front side for communicating an interior of the outflow portion with the vehicle interior.

According to this configuration, the battery pack includes the inlet portion and the outlet portion that are disposed to extend toward the front of the vehicle, and the electrical equipment is housed in the inlet portion and the outlet portion. Therefore, the electrical components can be disposed in a position in front of the battery module in the vehicle. This makes it possible to reduce the thickness of the battery pack.

Further, a first opening is formed in the inflow portion to communicate the interior of the inflow portion with the vehicle interior. The second opening is formed in the outflow portion to communicate the interior of the outflow portion with the vehicle interior. In addition, the outflow portion is also communicated with the inflow portion. Therefore, the fluid (specifically, air) in the vehicle interior can be sucked into the inflow portion through the first opening portion, and the sucked fluid can be introduced into the outflow portion. The fluid introduced into the outflow portion can be discharged into the vehicle interior through the second opening portion. Thus, the electrical equipment can be arranged in the inflow and outflow paths of the battery pack. Therefore, the electric equipment housed in the inflow portion and the outflow portion can be cooled by the fluid sucked from the vehicle interior.

(6) The present invention may further include: a pair of first slide rails (for example, first slide rails 52 according to the embodiment) that support a first seat (for example, the left rear seat 22 according to the embodiment) provided above the inflow portion and extend in the vehicle longitudinal direction with a space therebetween in the vehicle width direction; and a pair of second slide rails (for example, a second slide rail 54 of the embodiment) that support a second seat (for example, a right rear seat 23 of the embodiment) provided above the outflow portion, the inflow portion being disposed between the pair of first slide rails, the outflow portion being disposed between the pair of second slide rails, and the second seat extending in the vehicle longitudinal direction with a gap therebetween in the vehicle width direction.

Here, the pair of first slide rails and the pair of second slide rails are high-strength and high-rigidity members that support the first seat and the second seat so as to be movable in the vehicle body longitudinal direction.

In this configuration, the inflow portion is disposed between the pair of first slide rails, and the outflow portion is disposed between the pair of second slide rails. Thus, the battery pack can be protected more suitably by the pair of first slide rails and the pair of second slide rails.

In particular, when the battery pack is mounted on the rear side of the vehicle, the impact load input by a rear-end collision is supported by the pair of first slide rails and the pair of second slide rails, and thus the inflow portion and the outflow portion can be more appropriately protected from the impact load.

Effect of utility model

According to the utility model discloses, can reduce the influence to the garage space, and can ensure the space of configuration part in the below of floor portion.

Drawings

Fig. 1 is a perspective view showing a vehicle including a battery pack mounting structure according to an embodiment of the present invention.

Fig. 2 is a plan view showing a vehicle provided with the battery pack mounting structure of the embodiment.

Fig. 3 is an exploded perspective view showing a vehicle provided with a battery pack mounting structure according to an embodiment.

Fig. 4 is a cross-sectional view showing a vehicle provided with the battery pack mounting structure of the embodiment, cut at an inflow portion of the battery pack.

Fig. 5 is a plan view showing a state in which a pack cover is removed from a battery pack according to the embodiment and a part of the pack cover is cut.

Fig. 6 is a perspective view showing a state in which a part of the battery pack according to the embodiment is cut away.

Fig. 7 is a plan view showing a state in which the battery pack according to the embodiment is disassembled.

Fig. 8 is a cross-sectional view showing a vehicle provided with the battery pack mounting structure of the embodiment cut at the outflow portion of the battery pack.

Description of reference numerals:

10. vehicle with a steering wheel

14. Rear floor (floor)

15. First rear beam (Beam)

18. Power transmission device

19. Collection concave part (concave part)

20. Battery packaging body mounting structure

22. Left rear seat (first seat)

23. Right rear seat (second seat)

38. Vehicle cabin

50. Accumulator package

52. First sliding guide rail

54. Second sliding guide

56. Battery module

57. Electric installation component

58. Cooling fan

62. Accumulator storage part (rear part, package body rear part)

63. Inflow part

64. Outflow part

81. A first opening part

82. A second opening part

84. Middle section of packaging body (middle section)

91. Accumulator ECU (ECU)

92. High voltage connection platform (J/B)

93 A DC/DC converter.

Detailed Description

Hereinafter, a battery pack mounting structure according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle. In the embodiment, the example in which the battery pack mounting structure is provided in the rear portion of the vehicle is described as an example, but the battery pack mounting structure may be provided in another vehicle portion such as the front portion of the vehicle as another example.

As shown in fig. 1 to 3, the vehicle 10 includes left and right rear frames 12 and 13, a rear floor (floor) 14, a first rear cross member (cross member) 15, a second rear cross member 16, a power transmission device 18, a battery pack mounting structure 20, a left rear seat (first seat) 22, and a right rear seat (second seat) 23.

The left rear frame 12 is provided on the left outer side in the vehicle width direction at the lower portion of the vehicle body rear portion, and extends from the rear end portion of the left rocker 25 toward the vehicle rear. The right rear frame 13 is provided on the right outer side in the vehicle width direction at a lower portion of the vehicle body rear portion, and extends from a rear end portion of the right rocker 26 toward the vehicle rear.

The left rear frame 12 and the right rear frame 13 are, for example, highly rigid frame members that form a part of the vehicle body frame by being formed into a hollow closed cross section. The left and right side sills 25, 26 are, for example, highly rigid frame members that form a part of the vehicle body frame by being formed into a hollow closed cross section.

As shown in fig. 3 and 4, the rear floor 14 is provided between the left rear frame 12 and the right rear frame 13. The rear floor 14 has a left joint portion 31, a right joint portion 32, a floor surface portion 33, a floor front-stage portion 34, a floor middle-stage portion 35, and a floor rear-stage portion 36.

The left engaging portion 31 is engaged to the upper surface of the left rear frame 12. The right joint portion 32 is joined to the upper surface of the right rear frame 13. The floor surface portion 33 is disposed in front of a pair of first slide rails 52 and a pair of second slide rails 54, which will be described later, in the vehicle, and forms a floor surface of the vehicle interior 38.

The floor rear step portion 36 is formed at a portion of the rear floor 14 rearward of the vehicle. The floor rear-stage portion 36 is formed to be recessed downward relatively largely with respect to the floor surface portion 33, flat, and horizontal. The floor center step portion 35 extends continuously from the floor rear step portion 36 toward the vehicle front. The floor middle step portion 35 is formed flat and horizontally in a state of being disposed above the floor rear step portion 36. The floor front-stage portion 34 extends continuously from the floor middle-stage portion 35 toward the floor surface portion 33 toward the vehicle front. The floor front step portion 34 is formed flat and horizontally in a state of protruding upward with respect to the floor middle step portion 35 and the floor surface portion 33.

Thus, the rear floor 14 is formed so as to protrude upward from the floor rear step portion 36 to the floor front step portion 34 via the floor middle step portion 35 toward the vehicle front. This ensures a relatively large space 39 (hereinafter, also referred to as an arrangement space 39) below the rear floor 14 (i.e., the floor portion).

In the rear floor 14, a floor receiving recess (recess) 19 recessed downward is formed by the floor middle step portion 35 and the floor rear step portion 36. The package middle-stage portion 84 and the battery storage portion (package rear-stage portion) 62 of the battery package 50, which will be described later, are stored in the floor storage recess 19.

The first rear cross member 15 extends in the vehicle width direction along the lower surface of the floor center step portion 35, for example. The left end 15a of the first rear cross member 15 is joined to the lower end of the left rear frame 12, and the right end 15b of the first rear cross member 15 is joined to the lower end of the right rear frame 13. The first rear cross member 15 is formed in a top hat shape in cross section by the first U-shaped cross section portion 41, the first front flange 42, and the first rear flange 43.

The first front flange 42 and the first rear flange 43 of the first rear cross member 15 are joined to the lower surface of the floor middle section 35. Therefore, the first rear cross member 15 is a member having a high strength and rigidity, which is formed as a closed cross section together with the floor middle-stage section 35.

A power transmission device 18 is disposed below the first rear cross member 15. The reason why the power transmission device 18 is disposed below the first rear cross member 15 will be described in detail later.

The second rear cross member 16 extends in the vehicle width direction in a state of being disposed across the lower surface of the floor surface portion 33 and the lower surface of the floor front-end portion 34, for example. The left end portion 16a of the second rear cross member 16 is joined to the lower end portion of the left rear frame 12, and the right end portion 16b of the second rear cross member 16 is joined to the lower end portion of the right rear frame 13. The second rear cross member 16 is formed in a top hat shape in cross section by the second U-shaped cross section portion 45, the second front flange 46, and the second rear flange 47. The second front flange 46 of the second rear cross member 16 is joined to the lower surface of the floor surface portion 33, and the second rear flange 47 of the second rear cross member 16 is joined to the lower surface of the floor front-stage portion 34. Therefore, the second rear cross member 16 is a member having a high strength and rigidity and a closed cross section, together with the floor surface portion 33 and the floor front-end portion 34.

The battery pack mounting structure 20 is disposed above the rear floor panel 14. The battery pack mounting structure 20 includes a battery pack 50, a pack support frame 51, a pair of first slide rails 52 (see also fig. 2), and a pair of second slide rails 54 (see fig. 2).

The pack support frame 51 extends in the vehicle width direction by mounting the battery pack 50 on the upper surface of the left rear frame 12 and the upper surface of the right rear frame 13. The battery pack 50 is supported by the pack support frame 51. Thus, the battery pack 50 is supported on the upper surface of the left rear frame 12 and the upper surface of the right rear frame 13 via the pack support frame 51, and is mounted (disposed) above the rear floor 14.

As shown in fig. 4 to 6, the battery pack 50 includes a pack case 55, a battery module 56, electric components 57, a cooling fan 58, and a cooling duct 59. The package case 55 is formed in a U shape in a plan view by the battery housing portion 62, the inflow portion 63, and the outflow portion 64. The battery housing portion 62, the inflow portion 63, and the outflow portion 64 will be described in detail later.

The package case 55 includes a package case 65 having a stepped bottom and a package cover 66 having a substantially flat top. The package case 65 includes, for example, a pair of front walls 71, a pair of lower front step portions 72, a pair of first inclined walls 73, a pair of lower middle step portions 74, a second inclined wall 75, a lower rear step portion 76, and a rear wall 77.

Hereinafter, the pair of front walls 71, the pair of lower surface front step portions 72, the pair of first inclined walls 73, and the pair of lower surface middle step portions 74 may be simply referred to as front walls 71, lower surface front step portions 72, first inclined walls 73, and lower surface middle step portions 74.

The lower surface rear-stage portion 76 is disposed substantially horizontally along the floor rear-stage portion 36 above the floor rear-stage portion 36 in the floor storage recess 19.

The lower surface middle step 74 is disposed in a vehicle front direction of the lower surface rear step 76 so as to be recessed upward relative to the lower surface rear step 76. The lower surface middle step portion 74 is formed continuously with the lower surface rear step portion 76 via the second inclined wall 75. The lower surface middle step portion 74 is arranged substantially horizontally along the floor middle step portion 35 above the floor middle step portion 35 in the floor accommodating recessed portion 19.

The lower surface front step portion 72 is disposed in the vehicle front direction of the lower surface middle step portion 74 so as to be recessed upward with respect to the lower surface middle step portion 74. The lower surface front step portion 72 is formed continuously with the lower surface middle step portion 74 via the first inclined wall 73. The lower surface front step portion 72 is disposed substantially horizontally along the floor front step portion 34 above the floor front step portion 34.

That is, the battery package 50 is mounted on the floor storage recess 19 formed in the rear floor 14 from above. The package case 65 has a lower rear step portion 76, a lower middle step portion 74, and a lower front step portion 72 as it goes toward the vehicle front. The rear floor 14 includes a floor rear step portion 36, a floor middle step portion 35, and a floor front step portion 34 as it goes toward the vehicle front. The respective step portions 76, 74, 72 of the package case 65 are formed so as to be recessed stepwise upward along the respective step portions 36, 35, 34 of the rear floor 14 toward the vehicle front.

The upper end of the package case 65 is open at the opening. The opening of the package case 65 is covered with the package cover 66 from above.

The package cover 66 is formed flat and is disposed substantially horizontally in a state of being attached to the opening of the package case 65. The package case 55 is formed in a substantially sealed state by the package case 65 and the package cover 66.

As described above, the package case 55 is formed in a U shape in a plan view by the battery housing portion 62, the inflow portion 63, and the outflow portion 64.

The battery housing portion 62 forms a package rear-stage portion (rear-stage portion) by the rear portion 66a of the package cover 66 and the lower-surface rear-stage portion 76 of the package case 65. The battery housing 62 is located at a position behind the package case 55. The battery housing portion 62 is formed to have a thickness in the vertical direction T1 so as to be able to house (arrange) a battery module 56, which will be described later, and extends in the vehicle width direction.

The inflow portion 63 extends from the left end portion of the battery housing portion 62 toward the vehicle front side, and communicates with the battery housing portion 62. The inflow portion 63 has a first inflow portion 63a and a second inflow portion 63b. The first inflow portion 63a is disposed to extend from the left end portion of the battery housing portion 62 toward the vehicle front. The first inflow portion 63a has a thickness in the vertical direction T2 so as to be able to accommodate (arrange) a part (high-voltage terminal block 92) of the electrical component 57 described later. The thickness T2 of the first inflow portion 63a is set to be smaller than the thickness T1 of the battery housing portion 62.

The second inflow portion 63b is disposed to extend from the front end portion of the second inflow portion 63b toward the vehicle front. The second inflow portion 63b is set to have a thickness T3 in the vertical direction so as to be able to house (arrange) a part of the electrical component 57 (the battery ECU 91) described later. The thickness T3 of the second inflow portion 63b is set to be thinner than the thickness T2 of the first inflow portion 63 a.

The second inflow portion 63b has a first opening 81 formed at a front end portion in the vehicle front direction. The first opening 81 opens downward, for example, to communicate the vehicle interior 38 with the interior of the second inflow portion 63b (i.e., the inflow portion 63).

The outflow portion 64 extends from the right end of the battery housing portion 62 toward the vehicle front, and communicates with the inflow portion 63 via the battery housing portion 62. The outflow portion 64 has a first outflow portion 64a and a second outflow portion 64b. The first outflow portion 64a is disposed to extend from the right end portion of the battery housing portion 62 toward the vehicle front. The first outflow portion 64a has a thickness in the vertical direction T2 so as to be able to house (arrange) a cooling fan 58 described later. The thickness T2 of the first outflow portion 64a is set to be smaller than the thickness T1 of the battery housing portion 62.

The second outflow portion 64b is disposed to extend from the front end portion of the second outflow portion 64b toward the vehicle front. The second outflow portion 64b is formed to have a thickness T3 in the vertical direction so as to be able to house (arrange) a part of the electrical component 57 (the battery ECU 93) which will be described later. The thickness T3 of the second outflow portion 64b is set to be thinner than the thickness T2 of the first outflow portion 64a.

The second outflow portion 64b has a second opening 82 formed at a front end portion in the vehicle front direction. The second opening 82 opens downward, for example, to communicate the vehicle interior 38 with the interior of the second outflow portion 64b (i.e., the outflow portion 64).

The first inflow portion 63a and the first outflow portion 64a form a package middle step portion (middle step portion) 84 of the package case 55 by the center portion 66b of the package cover 66 and the lower surface middle step portion 74 of the package case 65. The package middle-stage portion 84 is set to have a thickness T2 so as to be thinner than the thickness T1 of the battery housing portion 62 (package rear-stage portion). The lower surface middle step portion 74 of the package middle step portion 84 is disposed along the floor middle step portion 35 of the floor accommodating recessed portion 19.

The second inflow portion 63b and the second outflow portion 64b form a package front section 85 of the package case 55 by the front portion 66c of the package cover 66 and the lower surface front section 72 of the package case 65. The package front-stage portion 85 is set to have a thickness T3 so as to be thinner than the thickness T2 of the package front-stage portion 85. The lower surface front step portion 72 of the package front step portion 85 is disposed along the floor front step portion 34 of the rear floor 14.

The lower surface rear-stage portion 76 of the battery housing portion 62 (package rear-stage portion) is disposed along the floor rear-stage portion 36 of the floor housing recess 19.

That is, the package case 55 (i.e., the battery package 50) is formed such that the bottom surface thereof is recessed upward so that the thickness in the vertical direction becomes thinner along the rear floor panel 14 toward the vehicle front. Therefore, the thickness of the battery pack 50 can be made thinner as it goes toward the vehicle front. This allows the height of the battery pack 50 (specifically, the upper surface) to be adjusted. Therefore, the influence on the space of the vehicle interior 38 (hereinafter, also referred to as a vehicle interior space) can be reduced by suppressing the height of the battery pack 50, and the occupancy of the vehicle 10 can be improved.

Further, by forming the bottom surface of the battery package 50 so as to be recessed upward, the rear floor panel 14 can be formed so as to protrude upward toward the vehicle front side from the floor rear step portion 36 to the floor front step portion 34 via the floor middle step portion 35. This ensures an arrangement space 39 for arranging components below the rear floor 14 (i.e., floor portion).

Examples of the members disposed below the rear floor 14 include the first rear cross member 15 and the power transmission device 18.

The package case 55 houses a battery module 56, an electrical component 57, a cooling fan 58, and a cooling duct 59.

The battery module 56 is, for example, a driving battery module. The battery module 56 is disposed to extend in the vehicle width direction in a state of being housed in a battery housing portion 62 at the vehicle rear side in the package case 55. The battery housing 62 is set to have a thickness T1 so as to be able to house the battery module 56. The battery module 56 is formed by, for example, stacking a plurality of batteries in the vehicle width direction to form a rectangular body, and houses the batteries in the battery housing section 62 in the vehicle width direction.

Examples of the electrical components 57 include a battery ECU91 (hereinafter, also referred to as ECU 91), a high-voltage junction box 92 (hereinafter, also referred to as J/B92), and a DC/DC converter 93. At least one electrical component 57 may be provided.

The ECU91 is disposed along the front portion 66c and the lower surface front step portion 72 of the package cover 66 inside the second inflow portion 63b, for example. The ECU91 is, for example, a battery management unit that controls discharge and charge between the battery module 56 for driving and a motor (not shown) for driving.

The J/B92 is disposed along the center portion 66B and the lower middle step portion 74 of the package cover 66, for example, inside the first inflow portion 63 a. The J/B92 is a device for supplying electric power of the battery module 56 for driving, which is housed in the battery housing portion 62, to the motor for driving, for example.

The ECU91 and the J/B92 are disposed in a state of overlapping (a superimposed state) with the battery module 56 when viewed from the vehicle front-rear direction. The ECU91 and the J/B92 are set to be thinner in the vertical direction than the thickness of the battery module 56.

The DC/DC converter 93 is disposed along the front portion 66c and the lower surface front step portion 72 of the package cover 66 inside the second outflow portion 64b, for example. The DC/DC converter 93 is a device that converts a voltage into a voltage that enables each electronic device (specifically, the ECU91, the J/B92) provided in the inflow portion 63 of the package case 55 to operate, and stabilizes the converted voltage. The DC/DC converter 93 is disposed in a state of overlapping with the battery module 56 when viewed from the vehicle front-rear direction (an overlapping state). The DC/DC converter 93 is set to be thinner in the vertical direction than the thickness of the battery module 56.

The cooling fan 58 is disposed along the center portion 66b and the lower surface middle step portion 74 of the package cover 66 inside the first outflow portion 64a, for example. Cooling fan 58 is disposed in a state of overlapping (overlapping) with battery module 56 when viewed in the vehicle front-rear direction. Cooling fan 58 is set to be thinner in the vertical direction than the thickness of battery module 56.

Battery module 56, ECU91, J/B92, and DC/DC converter 93 are cooled by the operation of cooling fan 58. Examples of cooling battery module 56, ECU91, J/B92, and DC/DC converter 93 will be described later in detail.

In this way, the battery pack 50 includes the inlet portion 63 and the outlet portion 64 that are arranged to extend toward the vehicle front side. The inlet 63 houses the ECU91 and the J/B92. The outlet 64 accommodates a DC/DC converter 93 and a cooling fan 58. Therefore, ECU91, J/B92, DC/DC converter 93, and cooling fan 58 can be disposed in a position in front of battery module 56 in the vehicle. This can reduce the thickness of the battery package 50.

The ECUs 91 and J/B92 of the inlet 63 overlap the battery module 56 when viewed in the vehicle front-rear direction, and are set to be thinner than the battery module 56. The DC/DC converter 93 and the cooling fan 58 of the outflow portion 64 are set so as to overlap the battery module 56 when viewed in the vehicle longitudinal direction and so as to be thinner than the thickness of the battery module 56.

Here, the rear floor 14 is formed to protrude upward as going toward the vehicle front. Therefore, the battery package 50 can be horizontally arranged in a state where the battery package 50 is arranged along the rear floor panel 14. This can reduce the influence on the vehicle interior space by suppressing the height of the battery pack 50, and can ensure an improvement in the occupancy of the vehicle 10.

An intake port of the cooling fan 58 is provided at the lower portion, and an exhaust port 58a of the cooling fan 58 opens inside the second outflow portion 64b. The intake port opens to a cooling passage 59 (described later) of the first outflow portion 64a. Further, a partition wall 95 is provided at a boundary between the first outflow portion 64a and the second outflow portion 64b. The partition wall 95 partitions the boundary between the first outflow portion 64a and the second outflow portion 64b, and opens a portion facing the discharge port 58 a. Therefore, the discharge port 58a opens at the second outflow portion 64b, and communicates with the second opening 82 via the second outflow portion 64b.

As shown in fig. 7 and 8, the cooling duct 59 is provided in the battery housing portion 62, the second inclined wall 75, and the first outflow portion 64a. The second inclined wall 75 is an inclined wall that connects the lower surface rear step portion 76 of the battery housing portion 62 and the lower surface middle step portion 74 of the first outflow portion 64a.

The cooling duct 59 is disposed, for example, inside the battery housing 62, at the lower rear step portion 76 and at the rear end of the battery module 56. Cooling duct 59 has an inlet opening at the rear of battery module 56, for example. The cooling passage 59 is disposed inside the first outflow portion 64a below the cooling fan 58 and below the lower surface middle step portion 74. Cooling duct 59 opens to an inlet of cooling fan 58 with an outlet port 59a.

As shown in fig. 3, 4, and 8, the first rear cross member 15 is disposed below the lower surface middle step portion 74 of the first outflow portion 64a and the lower surface middle step portion 74 of the first inflow portion 63a (i.e., the lower surface middle step portion 74 of the package case 65) in a state of extending in the vehicle width direction. Specifically, the first front flange 42 and the first rear flange 43 of the first rear cross member 15 are joined to the lower surface of the floor center section 35.

Here, in the battery pack 50, the thickness T2 of the pack middle step portion 84 is set to be thinner than the pack rear step portion (battery housing portion 62). That is, the lower surface middle step portion 74 of the package case 65 (the lower surface middle step portion 74 of the first outflow portion 64a and the lower surface middle step portion 74 of the first inflow portion 63 a) is formed to be recessed upward with respect to the lower surface rear step portion 76 of the package case 65. Therefore, the floor middle step portion 35 of the rear floor panel 14 can be formed to be recessed upward with respect to the floor rear step portion 36. This can secure the arrangement space 39 under the floor panel middle step portion 35 without protruding the package middle step portion 84 (battery package 50) toward the vehicle interior 38 side. The first rear cross member 15 is disposed in the disposition space 39. Therefore, the space of the vehicle interior 38 is less affected by the battery pack 50, and the battery pack 50 can be suitably protected by the first rear cross member 15.

A power transmission device 18 for driving a rear wheel, for example, is disposed below the first rear cross member 15. Here, the arrangement space 39 is secured wide below the floor center section 35. Therefore, the power transmission device 18 can be disposed below the first rear cross member 15. That is, the power transmission device 18 can be disposed in the disposition space 39 of the rear floor 14. The power transmission device 18 drives left and right rear wheels 97.

Therefore, for example, when the battery pack 50 is mounted on the rear side of the vehicle, the battery pack mounting structure 20 can be applied (applied) even when a four-wheel drive vehicle is configured by disposing the power transmission device 18 for driving the rear wheels in the disposition space 39 of the rear floor 14.

As shown in fig. 2, 4, and 8, a pair of first slide rails 52 and a pair of second slide rails 54 are provided above the battery pack 50.

The pair of first slide rails 52 are provided on the left side of the vehicle 10 above the inflow portion 63. Of the pair of first slide rails 52, the left outer first slide rail 52 has, for example, a front end portion 52a supported by the second rear cross member 16 via the floor surface portion 33 of the rear floor 14. The left outer first slide rail 52 is provided along the left rear frame 12, for example.

Of the pair of first slide rails 52, the first slide rail 52 on the left center side has, for example, a front end portion 52a supported by the second rear cross member 16 via the floor surface portion 33 of the rear floor 14. Further, for example, the rear portion 52b of the left center side first slide rail 52 is supported by the seat rail support portion 98.

The seat rail support portion 98 is disposed between the first inflow portion 63a and the first outflow portion 64a. The seat rail support portion 98 is supported from above by the vehicle width direction center portion 15c of the first rear cross member 15.

That is, the pair of first slide rails 52 extend in the vehicle front-rear direction with a gap therebetween in the vehicle width direction. An inflow portion 63 is disposed between the pair of first slide rails 52.

The left rear seat 22 (see fig. 1) is supported by the pair of first slide rails 52 so as to be movable in the vehicle front-rear direction. In this state, the left rear seat 22 is disposed above the inflow portion 63.

The pair of second slide rails 54 is provided on the right side of the vehicle 10 above the outflow portion 64. Of the pair of second slide rails 54, the right outer second slide rail 54 has, for example, a front end portion 54a supported by the second rear cross member 16 via the floor surface portion 33 of the rear floor 14. In addition, a right outer second slide rail 54 is provided along the right rear frame 13.

Of the pair of second slide rails 54, the right center side second slide rail 54 has, for example, a front end portion 54a supported by the second rear cross member 16 via the floor surface portion 33 of the rear floor 14. The rear portion 54b of the second slide rail 54 on the right center side is supported by the seat rail support portion 98, for example.

That is, the pair of second slide rails 54 extends in the vehicle longitudinal direction with a gap therebetween in the vehicle width direction. The outflow portion 64 is disposed between the pair of second slide rails 54.

The right rear seat 23 (see fig. 1) is supported by the pair of second slide rails 54 so as to be movable in the vehicle front-rear direction. In this state, the right rear seat 23 is disposed above the outflow portion 64.

Here, the pair of first slide rails 52 are high-strength and high-rigidity members that support the left rear seat 22 so as to be movable in the vehicle body longitudinal direction. Therefore, by disposing the inflow portion 63 between the pair of first slide rails 52, the battery pack 50 (specifically, the inflow portion 63) can be protected more appropriately by the pair of first slide rails 52.

The pair of second slide rails 54 are members having high strength and high rigidity that support the right rear seat 23 so as to be movable in the vehicle body longitudinal direction. Therefore, by disposing the outflow portion 64 between the pair of second slide rails 54, the battery package 50 (specifically, the outflow portion 64) can be protected more appropriately by the pair of second slide rails 54.

In particular, when the battery pack 50 is mounted on the rear side of the vehicle as in the embodiment, the impact load input by the rear collision can be supported by the pair of first slide rails 52 and the pair of second slide rails 54. Thus, the inflow portion 63 and the outflow portion 64 can be more suitably protected from the impact load by the pair of first slide rails 52 and the pair of second slide rails 54.

Next, an example of the battery module 56, the ECU91, the J/B92, and the DC/DC converter 93 that cool the battery pack 50 will be described with reference to fig. 5 and 8.

As shown in fig. 5 and 8, when the cooling fan 58 is driven, air (fluid) in the cooling passage 59 can be sucked from the intake port through the discharge port 59a of the cooling passage 59. The cooling fan 58 discharges the sucked air from the discharge port 58a to the second outflow portion 64b. Here, the second outflow portion 64b is partitioned from the first outflow portion 64a by a partition wall 95. Therefore, the air discharged from the discharge port 58a of the cooling fan 58 to the second outflow portion 64b can be guided to the second opening portion 82 without returning to the first outflow portion 64a, and the second opening portion 82 can be reliably discharged to the space (indoor space) of the vehicle interior 38 as indicated by arrow a.

The air in the cooling duct 59 is sucked by the cooling fan 58, and the air in the battery housing 62 is sucked into the cooling duct 59 as indicated by arrow B through the suction port of the cooling duct 59. The air in the battery housing 62 is sucked into the cooling duct 59, and the air in the first inflow portion 63a is introduced into the battery housing 62 as indicated by an arrow C. The air in the first inflow portion 63a is introduced into the battery housing portion 62, and the air in the second inflow portion 63b is introduced into the first inflow portion 63a as indicated by an arrow D. The air passing through the second inflow portion 63b is introduced into the first inflow portion 63a, and the air in the vehicle interior space is introduced into the second inflow portion 63b through the first opening 81 as indicated by arrow E.

As described above, by driving the cooling fan 58, the air in the vehicle interior space can be drawn into the inflow portion 63 through the first opening 81, and the drawn air can be introduced (flowed) into the battery storage portion 62 and the outflow portion 64. The air introduced into the outflow portion 64 can be released into the vehicle interior space through the second opening portion 82.

This allows the ECU91 and the J/B92 housed in the inflow portion 63 to be cooled by the air taken in from the indoor space. Further, the battery module 56 housed inside the battery housing portion 62 (cooling duct 59) can be cooled by the air introduced from the inflow portion 63. Then, the DC/DC converter 93 housed inside the outflow portion 64 can be cooled by the air introduced from the battery housing portion 62 (cooling duct 59).

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

In addition, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the scope of the present invention, and the above-described modifications may be combined as appropriate.

Claims (6)

1. A battery pack mounting structure in which a battery pack is mounted from above in a recess formed in a floor panel,

the battery package is provided with:

a battery module disposed to extend in a vehicle width direction;

at least one electrical installation component that controls the battery module; and

a cooling fan that cools the battery module and the electrical components,

the battery pack is formed so as to be recessed upward along the floor panel so that the thickness in the vertical direction becomes thinner toward the front of the vehicle.

2. The battery pack mounting structure according to claim 1,

the battery pack includes a middle step portion having a smaller vertical thickness than a rear step portion at a vehicle rear side of the battery pack,

a cross member extending in the vehicle width direction is disposed below the middle step portion.

3. The battery pack mounting structure according to claim 2,

a power transmission device is disposed below the cross member.

4. The battery pack mounting structure according to any one of claims 1 to 3,

the battery module is housed at a vehicle rear side of the battery package,

the electrical component overlaps the battery module when viewed in the vehicle front-rear direction, and has a thickness in the vertical direction that is smaller than the battery module.

5. The battery pack mounting structure according to any one of claims 1 to 3,

the battery package comprises:

an inflow portion that accommodates the electrical component in a state of being extended toward a vehicle front side and into which a fluid flows; and

an outflow portion that communicates with the inflow portion, that houses the electrical component in a state of being arranged to extend toward a vehicle front side, and that discharges a fluid from an inside of the outflow portion,

the inflow portion has a first opening portion formed at a front end portion of a vehicle front side for communicating an inside of the inflow portion with a vehicle interior,

the outflow portion has a second opening portion formed at a front end portion of a vehicle front side for communicating an inside of the outflow portion with the vehicle interior.

6. The battery pack mounting structure according to claim 5,

the battery pack mounting structure includes:

a pair of first slide rails that support a first seat provided above the inflow portion and extend in a vehicle front-rear direction with a space therebetween in the vehicle width direction; and

a pair of second slide rails that support a second seat provided above the outflow portion and extend in the vehicle front-rear direction with a space therebetween in the vehicle width direction,

the inflow portion is disposed between the pair of first slide rails,

the outflow portion is disposed between the pair of second slide rails.

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