Body structure

Abstract

To protect a battery and a routing member and achieve improvement of aerodynamic performance of an underfloor space when the battery and the routing member are provided below a floor panel.SOLUTION: A vehicle body structure A includes: a routing member 180 extending in a vehicle fore and aft direction at the outer side as seen in a vehicle width direction of a battery frame 10 below a floor panel 41; a cover member 15 extending from an area below the battery FB to an area below the routing member 180; battery frame fixing parts 63b, 63c which fix the battery frame 10 to side sills 60; and cover member fixing parts 61b, 61c which fix ends as seen in a vehicle width direction of the cover member 15 to the side sills 60. The routing member 180 and the battery frame fixing parts 63b, 63c are located at the inner side as seen in the vehicle width direction relative to the cover member fixing parts 61b, 61c.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle body structure provided in an automobile. [Background technology]

[0002] For example, in the case of an electric vehicle equipped with a traction motor, a large-capacity battery needs to be installed to extend the cruising range. For example, Patent Document 1 discloses a structure in which a large battery is installed below a floor panel disposed between a pair of left and right side sills. The battery in Patent Document 1 is housed in a rectangular box-shaped case main body, and a mounting portion provided on this case main body is fixed to a floor under-reinforcement. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-158688 Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, wiring members such as various pipes and harnesses are provided below the floor panel so as to extend in the fore-and-aft direction of the vehicle. In such cases, a cover is required to protect the wiring members.

[0005] Furthermore, in order to improve the aerodynamic performance of a vehicle, it can be important to deal with turbulence that occurs under the floor while the vehicle is moving. However, if the battery is mounted below the floor panel, a separate battery cover is also required to protect the battery. If a cover for the above-mentioned wiring member is also installed below the floor panel in addition to the battery cover, the aerodynamic performance under the floor could be degraded.

[0006] The present disclosure has been made in consideration of such points, and its purpose is to achieve both protection of the battery and wiring members and improvement of the aerodynamic performance under the floor when the battery and wiring members are installed below the floor panel. [Means for solving the problem]

[0007] To achieve the above object, a first aspect of the present disclosure can be premised on a vehicle body structure provided in an electric vehicle equipped with a traction motor, the vehicle body structure including a floor panel that forms a floor of an occupant space where seats for occupants are provided, a pair of left and right side sills extending in the vehicle front-rear direction at both ends of the floor panel in the vehicle width direction, Below the floor panel, Located between the pair of left and right side sills Overall Extends in the front-to-rear direction of the vehicle A frame-shaped battery housing space is provided to accommodate the battery. The vehicle includes a battery unit having a battery frame and supplying power to the traction motor, a wiring member extending in the front-rear direction of the vehicle outward in the vehicle width direction of the battery frame below the floor panel, a cover member extending from below the battery unit to below the wiring member, a battery frame fixing portion that fixes the battery frame to the side sill, and a cover member fixing portion that fixes an end of the cover member in the vehicle width direction to the side sill. The wiring member and the battery frame fixing portion are located inward in the vehicle width direction of the cover member fixing portion.

[0008] With this configuration, the cover member extends from below the battery unit to below the routing member, and the routing member and battery frame fixing portion are positioned further inward in the vehicle width direction than the cover member fixing portion, so that the battery unit and routing member can be covered and protected by the common cover member, improving the aerodynamic performance under the floor.

[0009] A vehicle body structure according to a second aspect of the present disclosure includes a floor panel, a pair of left and right side sills, and a vehicle body structure provided below the floor panel and between the pair of left and right side sills, a battery unit that supplies power to the driving motor, the battery unit having a frame-shaped battery frame that extends in the vehicle longitudinal direction as a whole and surrounds a battery housing space that houses a battery;The vehicle is provided with a wiring member storage space located below the floor panel between the outer side of the battery frame in the vehicle width direction and the side sill, in which wiring members extending in the fore-and-aft direction of the vehicle are stored, a cover member that covers the battery storage space and the wiring member storage space from below, and a cover member fixing portion that fixes the cover member to the side sill.

[0010] According to this configuration, both the battery accommodating space and the wiring member accommodating space can be covered and protected by a common cover member, thereby improving the aerodynamic performance under the floor.

[0011] Third Aspect of the Disclosure So, A seal member is provided between the lower surface of the battery frame and the upper surface of the cover member.

[0012] This configuration can prevent water and dust from entering between the battery frame and the cover member, thereby improving the protection performance of the battery.

[0013] In a fourth aspect of the present disclosure, a protrusion that protrudes downward and extends in the vehicle front-rear direction is provided at a portion of the lower side of the side sill that is spaced outward from an inner end in the vehicle width direction, and the routing member is provided inward in the vehicle width direction from the protrusion.

[0014] According to this configuration, the routing member can be provided along the protrusion provided on the side sill.

[0015] In a fifth aspect of the present disclosure, the battery frame fixing portion may be provided on the lower side of the side sill, more inward in the vehicle width direction than the protruding portion.

[0016] In a sixth aspect of the present disclosure, the cover member fixing portion can be provided on the protrusion. [Effects of the Invention]

[0017] As described above, the battery unit and the wiring member can be covered and protected by the common cover member, and the aerodynamic performance of the underfloor area can be improved. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a side view of an automobile equipped with a vehicle body structure according to an embodiment of the present invention. [Figure 2] FIG. 1 is a perspective view showing a state in which the automobile is divided into an upper structure and a lower structure. [Figure 3] FIG. [Figure 4] FIG. 2 is a plan view of a portion of the vehicle body structure. [Figure 5] FIG. 10 is a perspective view showing a part of the lower structure with the cover member removed. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0020] FIG. 1 is a side view of an automobile 1 equipped with a vehicle body structure A (shown in FIG. 2) according to an embodiment of the present invention, as viewed from the left. In describing this embodiment, the longitudinal direction of the vehicle will be simply referred to as the "longitudinal direction," the front side of the vehicle will be simply referred to as the "front side," and the "rear side" of the vehicle will be simply referred to as the "rear." Furthermore, the width direction of the vehicle is the lateral direction of the vehicle, with the left side of the vehicle being simply referred to as the "left side" and the right side of the vehicle being simply referred to as the "right side."

[0021] (Overall structure of the vehicle) The automobile 1 is a passenger vehicle, and a passenger space R1 for passengers is provided in the middle of the automobile 1 in the longitudinal direction. The passenger space R1 is provided with front seats (front seats) FS constituting the front seats, and rear seats (rear seats) RS constituting the rear seats. The front seats FS include a driver's seat located on the right (or left) side of the passenger space R1, and a passenger seat located on the left (or right) side of the passenger space R1. Rear seats RS are also located on the right and left sides of the passenger space R1. Although not shown, a third row of seats may be provided behind the rear seats RS. Furthermore, the rear seats RS are not essential and may be omitted.

[0022] A front door FD and a rear door RD are disposed on the left and right sides of the passenger space R1, respectively. In the case of an automobile 1 without a rear seat RS, the rear door RD can be omitted.

[0023] A front space R2 is provided in front of the passenger space R1 of the automobile 1. A powertrain PT can be installed in this front space R2 as needed. When the powertrain PT is installed in the front space R2, the front space R2 can also be called, for example, a powertrain storage room, a motor room, an engine room, etc. A bonnet hood BF is provided at the top of the front space R2.

[0024] As shown in FIG. 1, a luggage space R3 capable of accommodating luggage and the like is provided behind the passenger space R1 of the automobile 1. The luggage space R3 can be opened and closed by a trunk lid TR. A rear space R4 is provided behind the passenger space R1 of the automobile 1 and below the luggage space R3. A powertrain PT that generates power for the automobile 1 can be installed in this rear space R4 as needed. When the powertrain PT is installed in the rear space R4, the rear space R4 can also be called, for example, a powertrain storage room, a motor room, an engine room, etc.

[0025] The powertrain PT may be mounted in both the front space R2 and the rear space R4, or in only one of them. If the powertrain PT is mounted only in the front space R2, the vehicle is a front-wheel drive vehicle in which the powertrain PT drives only the front wheels FT. If the powertrain PT is mounted only in the rear space R4, the vehicle is a rear-wheel drive vehicle in which the powertrain PT drives only the rear wheels RT. Furthermore, if the powertrain PT is mounted in both the front space R2 and the rear space R4 and drives the front wheels FT and the rear wheels RT, the vehicle is a four-wheel drive vehicle.

[0026] The powertrain PT includes at least a traction motor M (shown in FIG. 2) for driving the drive wheels, and may also include a reducer, a transmission, etc. as necessary. Therefore, the automobile 1 is an electric vehicle. The traction motor M is disposed so that its center of rotation extends in the left-right direction. In addition to the traction motor M, the powertrain PT may also include, for example, a control unit, etc. The powertrain PT may also include an internal combustion engine. A battery unit Y (also shown in FIG. 1) for supplying power to the traction motor M is mounted on the bottom of the automobile 1. For example, the battery unit Y may be charged using power generated by the internal combustion engine, or at least one of the front wheels FT and the rear wheels RT may be driven by power generated by the internal combustion engine.

[0027] The type of automobile 1 does not have to be a four-door vehicle as shown in Fig. 1 as an example, and may be, for example, an automobile without a rear door RD. Furthermore, although not shown, the present invention can also be applied to an automobile in which the rear space R4 can be opened and closed with a tailgate, such as a hatchback.

[0028] As shown in Figure 2, automobile 1 is equipped with a lower structure 2 and an upper structure 3, and a vehicle body structure A is formed by the front portion of the lower structure 2 and the front portion of the upper structure 3. Figure 2 shows the upper structure 3 with the doors FD, RD, bonnet hood BF, fenders, windshield, roof, center pillars, rear pillars, front bumper, rear bumper, front and rear lighting devices including headlights, instrument panel, front and rear seats, etc. removed. Figure 2 also shows the lower structure 2 with the front wheels FT, rear wheels RT, suspension devices, etc. removed.

[0029] The lower structure 2 is equipped with a battery unit Y. The battery unit Y has a front battery FB, a rear battery RB, and a frame (battery frame) 10 that surrounds the front battery FB and the rear battery RB. The lower structure 2 also has a front support frame 20 that extends forward from the front of the frame 10, and a rear support frame 30 that extends rearward from the rear of the frame 10.

[0030] Although not shown, in the case of a typical electric vehicle, the battery unit is often separate from the vehicle body and is detachably attached under the floor. However, in this embodiment, not only are the batteries FB, RB integrated into the frame-type frame 10 that surrounds the batteries FB, RB, but the front support frame 20 and rear support frame 30 are also integrated into the frame-type frame 10, and the front support frame 20 and rear support frame 30, together with the batteries FB, RB, are detachably attached to the upper structure 3.

[0031] Specifically, the automobile 1 of this embodiment is configured to be separable into an upper and lower structure 2 having batteries FB, RB, and an upper structure 3 that forms the passenger space R1 and the luggage compartment space R3. Being separable into upper and lower structures means that the lower structure 2 is integrated with the upper structure 3 using fastening members such as bolts, nuts, and screws, without using welding, adhesives, or the like. This allows the lower structure 2 to be separated from the upper structure 3 as needed when performing maintenance or repairs on the automobile 1 after it has been delivered to the user, improving maintainability.

[0032] Here, a ladder frame type vehicle body structure is known as an automobile body structure. In the case of a ladder frame type vehicle body structure, the ladder frame can be separated into an upper and lower portion and a cabin. However, since the ladder frame extends continuously in the fore-and-aft direction, it mainly bears the collision load in the event of a frontal collision and a rearward collision. In the event of a side collision, the ladder frame only auxiliarily bears the collision load, and it is the cabin that mainly bears the collision load. In this way, in a ladder frame type vehicle body structure, the components that bear the collision load in the event of a frontal collision and a rearward collision and in the event of a side collision are usually separated.

[0033] In contrast, in the case of the automobile 1 of this embodiment, the lower structure 2 having the front support frame 20 and the rear support frame 30 and the upper structure 3 are separable, but in the event of a frontal collision, a rear collision, or a side collision, the collision load is received by the lower structure 2 and the upper structure 3, and the collision load can be distributed and absorbed between the two structures 2, 3, which is a significant difference in technical concept from a conventional ladder frame type vehicle body structure. Below, the structures of the lower structure 2 and the upper structure 3 will be described in order. Note that in this embodiment, an example in which the lower structure 2 and the upper structure 3 can be separated will be described, but the present invention is not only applicable to such separable vehicle body structures, but is also applicable to vehicle body structures that cannot be separated into the lower structure 2 and the upper structure 3.

[0034] (undercarriage) First, we will explain the lower structure 2. In addition to the batteries FB, RB, the frame 10, the front support frame 20, and the rear support frame 30, the lower structure 2 also includes a power train PT, front wheels FT, rear wheels RT, and front suspension devices SP1, SP2 and rear suspension devices SP3, SP4 shown by imaginary lines in Fig. 4. There are no particular restrictions on the types of the front suspension devices SP1, SP2 and rear suspension devices SP3, SP4, and it is also possible to change the vehicle body structure depending on the types of the front suspension devices SP1, SP2 and rear suspension devices SP3, SP4.

[0035] As shown in FIG. 2 , the frame-type frame 10, which forms the framework of the battery unit Y, is a member for enclosing and protecting the front battery FB, the rear battery RB, harnesses, and the like. The front battery FB and the rear battery RB are disposed inward of the frame-type frame 10 in the vehicle width direction. As also shown in FIG. 5 , the frame-type frame 10 is formed large below a passenger-space-side floor panel 41 (described later), extending from near the left end to near the right end of the passenger-space-side floor panel 41 and from near the front end to near the rear end of the passenger-space-side floor panel 41. By providing the frame-type frame 10 over a wide area below the passenger-space-side floor panel 41 in this manner, it is possible to mount large-capacity batteries FB and RB in the automobile 1. The batteries FB and RB may be, for example, lithium-ion batteries, all-solid-state batteries, or other secondary batteries. The batteries FB and RB may also be so-called battery cells or battery packs containing multiple battery cells.

[0036] The frame 10 includes a left side member 11, a right side member 12, a front member 13, and a rear member 14, and is disposed between a pair of left and right side sills 60, 60, extending in the longitudinal direction as a whole. The left side member 11, the right side member 12, the front member 13, and the rear member 14 are made of, for example, an aluminum alloy extrusion, but may also be made of aluminum alloy plate material or press-formed steel plate material. In the following description, the term "extruded material" refers to an aluminum alloy extrusion material, and the term "press-formed material" refers to an aluminum alloy plate material or press-formed steel plate material. Furthermore, each member may be made of, for example, a casting, a die-cast, or the like.

[0037] The cross-sectional shapes of the left side member 11, right side member 12, front member 13, and rear member 14 in a direction perpendicular to the longitudinal direction are all rectangular. The left side member 11, right side member 12, front member 13, and rear member 14 are all disposed at the same height and extend substantially horizontally. The front member 13 extends in the vehicle width direction in front of the battery unit Y.

[0038] When joining the lower structure 2 to the upper structure 3, the front member 13 is fastened to the lower part of the dash panel 50 with fastening members, and the left side member 11 and the right side member 12 are fastened to the left and right side sills 60 with fastening members, respectively. In addition, the rear member 14 is fastened to a connecting panel 43 (described later) with fastening members.

[0039] The left side member 11 is provided at the left end of the lower structure 2 and extends in the front-rear direction. The right side member 12 is provided at the right end of the lower structure 2 and extends in the front-rear direction. The left side member 11 and the right side member 12 are respectively disposed on the vehicle widthwise inner side of left and right side sills 60 (described later). The front member 13 extends from the front end of the left side member 11 to the front end of the right side member 12. The left end of the front member 13 is connected to the front end of the left side member 11, and the right end of the front member 13 is connected to the front end of the right side member 12. The rear member 14 is provided at the rear of the battery unit Y and extends in the left-right direction from the rear end of the left side member 11 to the rear end of the right side member 12. The left end of the rear member 14 is connected to the rear end of the left side member 11, and the right end of the rear member 14 is connected to the rear end of the right side member 12.

[0040] A cover member 15 (shown in FIG. 5 ) serving as a bottom plate is attached to the lower part of the frame 10. The frame 10 is closed from below by the cover member 15. The cover member 15 extends substantially horizontally and is fixed to the lower surfaces of the left side member 11, the right side member 12, the front member 13, and the rear member 14, and is also fixed to a side sill 60 as described below. The upper part of the frame 10 may be closed by a lid (not shown) or by a passenger space side floor panel 41 (described below). Electric power from batteries FB, RB housed in the frame 10 is supplied to a driving motor M via a driving control circuit (not shown). Furthermore, the batteries FB, RB can be charged via a charging socket (not shown).

[0041] As shown in Fig. 2, a pair of left and right front support frames 20 are provided, and extend linearly and substantially horizontally below the upper structure 3. The left front support frame 20 is connected to a portion of the front member 13 that constitutes the front part of the frame-type frame 10, which is shifted to the left of the center in the left-right direction. The right front support frame 20 is connected to a portion of the front member 13 that is shifted to the right of the center in the left-right direction. The front powertrain PT is attached to the front support frame 20 via a mount member (not shown). The lower structure 2 is provided with drive shafts S1 on the left and right that transmit the output of the powertrain PT (the rotational force of the travel motor M) to the left and right front wheels FT, respectively.

[0042] Similar to the front support frames 20, a pair of left and right rear support frames 30 are provided, and extend rearward in a substantially horizontal straight line. The rear powertrain PT is attached to the rear support frames 30 via mounting members (not shown). Drive shafts S2 are provided on the left and right of the lower structure 2 to transmit the output of the powertrain PT (the rotational force of the traveling motor M) to the left and right rear wheels RT, respectively.

[0043] (superstructure) Next, the upper structure 3 will be described. The upper structure 3 includes a floor constituent member 40, a dash panel 50, and a pair of left and right side sills 60. The floor constituent member 40 is a member disposed above the frame-type frame 10 and rear support frame 30 of the lower structure 2. This floor constituent member 40 includes a passenger-space-side floor panel 41 that constitutes the floor of the passenger space R1 in which the front seats FS and rear seats RS (shown in FIG. 1) on which passengers sit are provided, a luggage-space-side floor panel 42 that constitutes the floor of the luggage space R3, and a connection panel 43 that connects the rear portion of the passenger-space-side floor panel 41 and the front portion of the luggage-space-side floor panel 42. The connection panel 43 constitutes a kick-up portion.

[0044] The floor structural member 40 can be formed, for example, from a member obtained by press-forming a steel plate or the like. The passenger space-side floor panel 41, the luggage space-side floor panel 42, and the connecting panel 43 may be integrally formed, or may be formed separately and then connected. In this embodiment, the floor structural member 40 is described as being divided into three parts: the passenger space-side floor panel 41, the luggage space-side floor panel 42, and the connecting panel 43; however, the floor structural member 40 including these panels 41 to 43 may be referred to as a floor panel. Alternatively, only the passenger space-side floor panel 41 may be referred to as a floor panel.

[0045] The passenger space side floor panel 41 extends from the front to the rear of the passenger space R1 and from the left side to the right side of the passenger space R1. The passenger space side floor panel 41 according to this embodiment has a floor tunnel-less structure without a tunnel portion, but may have a tunnel portion.

[0046] A recessed portion 41a that bulges downward is formed in the middle of the passenger space side floor panel 41 in the front-to-rear direction. The recessed portion 41a has a bottom surface 41b on which the feet of a rear seat occupant sitting in the rear seat RS can be placed. The bottom surface 41b is formed substantially horizontally. The recessed portion 41a can be formed continuously from the left side to the right side of the passenger space side floor panel 41.

[0047] The luggage space-side floor panel 42 is positioned higher than the passenger space-side floor panel 41. The rear space R4 is located below the luggage space-side floor panel 42. Because the luggage space-side floor panel 42 is positioned higher than the passenger space-side floor panel 41, the connection panel 43 extends in the vertical direction.

[0048] As also shown in Figure 3, the dash panel 50 is a component that serves as a partition between the front space R2 and the passenger space R1, and extends upward from the front of the passenger space side floor panel 41 and also extends in the left-right direction, separating the front of the passenger space R1.

[0049] As shown in FIG. 2 , the left and right side sills 60 are disposed so as to extend in the front-rear direction at both left and right end portions of the passenger-space-side floor panel 41. The left end portion of the passenger-space-side floor panel 41 is connected to the vertical middle portion of the left side sill 60, with the upper portion of the side sill 60 protruding upward from the connection portion of the passenger-space-side floor panel 41 and the lower portion of the side sill 60 protruding downward from the connection portion of the passenger-space-side floor panel 41. A battery unit Y including batteries FB and RB is disposed below the passenger-space-side floor panel 41, so that the lower portion of the side sill 60 overlaps with the batteries FB and RB in a side view of the vehicle. Similarly, the right side sill 60 is connected to the right end portion of the passenger-space-side floor panel 41. As shown in FIG. 6 , a battery storage space 49 for storing the battery unit Y is provided between the pair of left and right side sills 60 below the passenger-space-side floor panel 41.

[0050] The upper structure 3 is equipped with a pair of left and right hinge pillars 70. The right hinge pillar 70 extends upward from the front end of the right side sill 60. The left hinge pillar 70 also extends upward from the front end of the left side sill 60. Left and right front doors FD (shown in FIG. 1 ) are rotatably attached to the left and right hinge pillars 70, respectively. The left edge of the dash panel 50 is connected to the right side surface of the left hinge pillar 70. The right edge of the dash panel 50 is connected to the left side surface of the right hinge pillar 70. Although not shown, a center pillar, a rear pillar, etc. are also provided on the upper structure 3.

[0051] A left front wheel suspension support member 51A that supports a suspension device (front suspension device) SP1 (shown by a phantom line in FIG. 4) for the left front wheel FT is provided on the left side of the dash panel 50 on the upper structure 3. Furthermore, a right front wheel suspension support member 51B that supports a suspension device (front suspension device) SP2 (shown by a phantom line in FIG. 4) for the right front wheel FT is provided on the right side of the dash panel 50 on the upper structure 3.

[0052] 4 and other figures, a left-side fixing frame 52A for fixing a left-side front wheel suspension support member 51A and a right-side fixing frame 52B for fixing a right-side front wheel suspension support member 51B are provided at the front of the vehicle body. In addition, the upper structure 3 includes a left-side front frame 54A and a right-side front frame 54B.

[0053] The upper structure 3 includes a left rear side frame 112A that extends in the front-to-rear direction on the left side and rearward of the rear of the passenger space side floor panel 41, and a right rear side frame 112B that extends in the front-to-rear direction on the right side and rearward of the rear of the passenger space side floor panel 41.

[0054] A left rear wheel suspension support member 110A that supports a suspension device (rear suspension device) SP3 (shown by a phantom line in FIG. 4) for the left rear wheel RT is provided on the left side of the connecting panel 43 on the upper structure 3. Furthermore, a right rear wheel suspension support member 110B that supports a suspension device (rear suspension device) SP4 (shown by a phantom line in FIG. 4) for the right rear wheel RT is provided on the right side of the connecting panel 43 on the upper structure 3.

[0055] An example of the type of suspension devices SP1, SP2, SP3, and SP4 is an air suspension device having an air spring made up of an air chamber. Although not shown, the air suspension device is equipped with an air pump, air pipes that send air pressurized from the air pump to the front and rear air chambers, valves for adjusting the amount of air sent to the air chambers and the amount of air exhausted from the air chambers, and the like.

[0056] 3, the passenger space side floor panel 41 has a front cross member 44A, an intermediate cross member 44B, a recessed portion front cross member 44C, and a recessed portion rear cross member 44D. The front cross member 44A, the intermediate cross member 44B, the recessed portion front cross member 44C, and the recessed portion rear cross member 44D extend in the left-right direction and are fixed to the upper surface of the passenger space side floor panel 41.

[0057] The front cross member 44A is disposed in front of the passenger space side floor panel 41. The front portion of the front cross member 44A is also joined to the lower part of the dash panel 50. The intermediate cross member 44B is disposed behind the front cross member 44A and in front of the recessed portion 41a.

[0058] The recessed portion front cross member 44C is disposed rearward of the intermediate cross member 44B and extends in the left-right direction along the front portion of the recessed portion 41a. The recessed portion rear cross member 44D is disposed rearward of the recessed portion front cross member 44C and extends in the left-right direction along the rear portion of the recessed portion 41a. The recessed portion front cross member 44C and the passenger space side floor panel 41 form a closed cross section, and the recessed portion rear cross member 44D and the passenger space side floor panel 41 also form a closed cross section. By providing the recessed portion front cross member 44C and the recessed portion rear cross member 44D, the portion where the recessed portion 41a is formed can be reinforced. The front portion of the floor frame 41c disposed inside the recessed portion 41a is connected to the left-right center portion of the recessed portion front cross member 44C, and the rear portion of the floor frame 41c is connected to the left-right center portion of the recessed portion rear cross member 44D.

[0059] As shown in Figure 2 and other figures, the upper structure 3 is equipped with a center frame 80 that extends continuously in the front-to-rear direction from the dash panel 50 to the connecting panel 43. This center frame 80 is located in the center in the left-to-right direction, and the rear of the center frame 80 is connected to the connecting panel 43. A left front seat FS and a rear seat RS are disposed on the left side of the center frame 80, while a right front seat FS and a rear seat RS are disposed on the right side of the center frame 80.

[0060] The center frame 80 has a front frame member 81 extending in the front-to-rear direction, a rear frame member 82 disposed rearward of the front frame member 81 and extending rearward, and a connecting member 83 connecting the rear portion of the front frame member 81 to the front portion of the rear frame member 82. The front frame member 81 and the rear frame member 82 are hollow, i.e., tubular and extending in the front-to-rear direction, and may be made of, for example, an extruded material. Note that the center frame 80 is not limited to a two-piece structure consisting of the front frame member 81 and the rear frame member 82, but may be made of a single member or a three-piece structure. If made of a single member, the connecting member 83 can be omitted.

[0061] 3, the center frame 80 has a left frame constituent member 84A and a right frame constituent member 84B that form the front portion of the center frame 80. The rear portion of the left frame constituent member 84A is fixed to the left side surface of the front frame member 81 in the middle portion in the fore-and-aft direction. The rear portion of the right frame constituent member 84B is fixed to the right side surface of the front frame member 81 in the middle portion in the fore-and-aft direction.

[0062] The upper structure 3 includes a first fixing member 101, a second fixing member 102, and a third fixing member 103 that fix the center frame 80 to the passenger space side floor panel 41. A lower portion of the third fixing member 103 is connected to the left-right center portion of the recessed portion front cross member 44C.

[0063] 5 is a perspective view showing a part of the lower structure 2 with the cover member 15 removed. A passage forming portion 15a that forms a cooling water passage through which cooling water can flow is provided on the upper surface of the cover member 15. The passage forming portion 15a is located directly below the front battery FB and the rear battery RB, and the front battery FB and the rear battery RB are efficiently cooled by the cooling water flowing inside the passage forming portion 15a.

[0064] As shown in FIG. 6 , a wiring member 180 extending in the front-rear direction below the passenger space floor panel 41 is provided on the left side of the left side member 11 of the frame-type frame 10 (outside the vehicle width direction of the frame-type frame 10). That is, a wiring member storage space 62 for storing the wiring member 180 is formed continuously in the front-rear direction below the passenger space floor panel 41 between the vehicle width direction outward of the left side member 11 and the left side sill 60. The wiring member 180 may be, for example, a harness, a cooling water pipe, a refrigerant pipe, a hydraulic pipe, an air pipe, or the like. Only one of these may be provided, or any two or more of them may be provided. The air pipe may be, for example, a pipe connected to a front or rear air suspension device, an air pump, or the like. Although not shown, a wiring member storage space may also be provided on the right side. Alternatively, the wiring member storage space may be provided only on either the left or right side.

[0065] The cover member 15 is provided from below the left side member 11 to below the right side member 12 of the frame-type frame 10, and from below the front member 13 to below the rear member 14. Specifically, the cover member 15 extends from below the battery unit Y to below the wiring member 180, and is therefore a large member that covers the battery accommodating space 49 and the wiring member accommodating space 62 from below. By providing a cover member 15 of this size, most of the lower part of the vehicle body can be covered with the cover member 15, so the cover member 15 functions as an undercover and suppresses the generation of turbulent air under the floor while the vehicle is traveling.

[0066] In the example shown in FIG. 5, cover member 15 is made up of a single member, which is advantageous in that the number of parts required during assembly can be reduced. Cover member 15 may also be made up of a combination of multiple members. For example, a single cover member 15 can be made up by arranging multiple plate members extending in the vehicle width direction in the front-rear direction and joining them together, or by arranging multiple plate members extending in the front-rear direction and joining them together in the vehicle width direction. Furthermore, cover member 15 may have a structure in which multiple plate members are each fixed to the vehicle body.

[0067] As shown in Figure 6, a sealant 181 made of an elastic material such as rubber is disposed between the upper surface of the cover member 15 and the lower surface of the frame 10. The sealant 181 extends in an annular shape along the lower surface of the frame 10. When the cover member 15 is attached to the side sill 60, the sealant 181 is compressed between the upper surface of the cover member 15 and the lower surface of the frame 10 and elastically deforms. This allows the sealant 181 to come into close contact with the upper surface of the cover member 15 and the lower surface of the frame 10, preventing water, dust, and the like from entering between the cover member 15 and the frame 10.

[0068] A protrusion 61 that protrudes downward and extends in the front-to-rear direction is provided at a portion of the lower side of the side sill 60 away from the inner end in the vehicle width direction to the outside. A wiring member 180 is provided more inward in the vehicle width direction than the protrusion 61. In this embodiment, the protrusion 61 is provided at a middle portion in the vehicle width direction on the lower side of the side sill 60, but the protrusion 61 may have a shape that reaches the outer end in the vehicle width direction on the lower side of the side sill 60. Furthermore, a lateral rib 60a extending in the vehicle width direction and a vertical rib 60b extending in the up-down direction are provided inside the side sill 60. The lateral rib 60a and the vertical rib 60b are integrally molded.

[0069] The lower wall portion 61a of the protrusion 61 extends horizontally in the left-right and front-rear directions. The cover member 15 is fixed to the lower wall portion 61a of the protrusion 61. That is, a nut 61b is fixed to the upper surface of the lower wall portion 61a of the protrusion 61. The left side portion of the cover member 15 is adapted to be placed on the lower surface of the lower wall portion 61a of the protrusion 61. The bolt 61c is passed through the left side portion of the cover member 15 from below and also through the lower wall portion 61a of the protrusion 61 from below and threaded onto the nut 61b, thereby detachably fixing the cover member 15 to the side sill 60. The nuts 61b and bolts 61c are cover member fixing portions that fix the end portion of the cover member 15 in the vehicle width direction to the side sill 60, and multiple nuts 61b and bolts 61c are provided at intervals in the front-rear direction.

[0070] Furthermore, a fixing plate 63 extending horizontally in the left-right and front-rear directions is provided on the side sill 60 inward in the vehicle width direction from the accommodation space 62. Meanwhile, a fastened portion 11a protruding leftward is provided on the left side member 11 of the frame 10, and this fastened portion 11a is fixed to the fixing plate 63. Specifically, a nut 63b is fixed to the upper surface of the fixing plate 63. The fastened portion 11a is configured to overlap the lower surface of the fixing plate 63. A bolt 63c is passed through the fastened portion 11a from below and the fixing plate 63 from below and threaded onto the nut 63b, thereby removably fixing the left side member 11 of the frame 10 to the side sill 60. Reference numeral 63d denotes a cylindrical collar, which is a member for adjusting the height of the frame 10 after being fixed to the side sill 60 to a predetermined height. A plurality of nuts 63b and bolts 63c are provided at intervals in the front-rear direction. The right side can be configured in the same way as the left side. The nuts 63b and bolts 63c are battery frame fixing parts that fix the frame-type frame 10 to the side sill 60.

[0071] In this embodiment, the routing member 180 and the nuts 63b and bolts 63c for fixing the frame 10 to the side sill 60 are positioned more inward in the vehicle width direction than the nuts 61b and bolts 61c for fixing the vehicle width direction ends of the cover member 15 to the side sill 60. The routing member 180 is positioned between the nuts 63b and bolts 63c and the nuts 61b and bolts 61c. Furthermore, the nuts 63b are positioned above the nuts 61b.

[0072] (Effects of the embodiment) As described above, according to this embodiment, the battery storage space 49 and the wiring member storage space 62 located below the passenger space side floor panel 41 can be covered with a common cover member 15, thereby improving the aerodynamic performance under the floor compared to when the battery storage space 49 and the wiring member storage space 62 are covered with separate members.

[0073] Furthermore, since the battery unit T in the battery accommodating space 49 and the wiring member 180 housed in the wiring member accommodating space 62 can be protected by the common cover member 15, the number of parts can be reduced.

[0074] Furthermore, a sealing material 181 is provided between the upper surface of the cover member 15 and the lower surface of the frame 10, which prevents water and dust from entering between the cover member 15 and the frame 10, further improving the protection performance of the front battery FB and the rear battery RB.

[0075] The above-described embodiments are merely examples in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0076] As described above, the present invention can be used as a body structure for an electric vehicle, for example. [Explanation of symbols]

[0077] 1. Automobiles 10. Frame type frame (battery frame) 15 Cover member 41 Passenger space side floor panel 49 Battery storage space 60 Side sill 61 Protrusion 61b, 61c Nut, bolt (cover member fixing part) 62 Routing member storage space 63b, 63c Nuts and bolts (battery frame fixing parts) 180 Routing components 181 Sealing material M Traction motor Y Battery Unit

Claims

1. A vehicle body structure provided on an electric vehicle equipped with a traction motor, a floor panel that constitutes a floor of an occupant space in which a seat for an occupant is provided; and a pair of left and right side sills extending in the front-rear direction of the vehicle at both ends of the floor panel in the vehicle width direction; a battery unit that is disposed below the floor panel between the pair of left and right side sills, extends in the vehicle longitudinal direction as a whole, has a frame-shaped battery frame that surrounds a battery housing space that houses a battery, and supplies power to the driving motor; a wiring member extending in a vehicle front-rear direction below the floor panel and outward in a vehicle width direction of the battery frame; a cover member extending from below the battery unit to below the wiring member; a battery frame fixing portion that fixes the battery frame to the side sill; a cover member fixing portion that fixes an end portion of the cover member in the vehicle width direction to the side sill, A vehicle body structure in which the routing member and the battery frame fixing portion are located more inward in the vehicle width direction than the cover member fixing portion.

2. A vehicle body structure provided on an electric vehicle equipped with a traction motor, a floor panel that constitutes a floor of an occupant space in which a seat for an occupant is provided; and a pair of left and right side sills extending in the front-rear direction of the vehicle at both ends of the floor panel in the vehicle width direction; a battery unit that is provided below the floor panel between the pair of left and right side sills, extends in the vehicle longitudinal direction as a whole, has a frame-shaped battery frame that surrounds a battery housing space that houses a battery, and supplies power to the driving motor; a wiring member accommodating space provided below the floor panel between the outer side of the battery frame in the vehicle width direction and the side sill, the wiring member accommodating space accommodating a wiring member extending in the vehicle front-rear direction; a cover member that covers the battery accommodating space and the wiring member accommodating space from below; a cover member fixing portion that fixes the cover member to the side sill.

3. The vehicle body structure according to claim 1 or 2, A vehicle body structure in which a seal member is provided between the lower surface of the battery frame and the upper surface of the cover member.

4. The vehicle body structure according to claim 1, a protruding portion that protrudes downward and extends in the vehicle front-rear direction is provided at a portion of the lower side of the side sill that is spaced outward from an inner end portion in the vehicle width direction, A vehicle body structure in which the wiring member is provided on the inner side of the protruding portion in the vehicle width direction.

5. The vehicle body structure according to claim 4, A vehicle body structure in which the battery frame fixing portion is provided on the lower side of the side sill, further inward in the vehicle width direction than the protruding portion.

6. The vehicle body structure according to claim 5, A vehicle body structure in which the cover member fixing portion is provided on the protrusion.

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