Battery-powered vehicles

Abstract

To provide a battery-mounted vehicle having constitution in which a battery pack is mounted at a vehicle lower side of a floor pan, the battery-mounted vehicle enabling without increasing weight or adding a component, reduction of noise having a wide frequency band and intruding into a cabin from an underfloor.SOLUTION: A battery-mounted vehicle 10 is provided, comprising: a battery pack 30 which is mounted at a vehicle lower side of a floor pan 14 of a cabin 12; a vehicle body frame member 20 which includes a vertical wall 28C facing a peripheral wall 40 of the battery pack 30 with a gap G3 in a vehicle horizontal direction; and an expansion chamber 50 constructed in a cross-sectional view in the vehicle horizontal direction by at least one of an inner recess 54 which inwardly recesses in the vehicle horizontal direction into the peripheral wall 40 of the battery pack 30 and an outer recess 52 which outwardly recesses in the vehicle horizontal direction into the vertical wall 28C of the vehicle body frame member 20.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a battery-equipped vehicle. [Background technology]

[0002] A battery-powered vehicle with a battery pack mounted below the floor pan that reduces noise entering the vehicle cabin from under the floor without increasing mass or adding components has been known for some time (see, for example, Patent Document 1). In this battery-powered vehicle, multiple sound-absorbing through-holes are formed in the wall of the battery pack that faces the rocker across a gap, and the multiple sound-absorbing through-holes connect the gap to a space below the battery pack. As a result, some of the noise from under the vehicle cabin that passes through the gap toward the floor pan passes through the sound-absorbing through-holes and enters the space below, where it is absorbed using the principle of a Helmholtz resonator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-187973 Summary of the Invention [Problem to be solved by the invention]

[0004] However, noise reduction measures using the principle of the Helmholtz resonator can only absorb sound in a limited frequency band. As such, in a configuration in which the battery pack is mounted below the floor pan, there is still room for improvement in a structure that reduces noise across a wide frequency band (not limited to a limited frequency band) that enters the vehicle cabin from under the floor without increasing mass or adding components.

[0005] Therefore, the present invention aims to provide a battery-equipped vehicle in which a battery pack is mounted on the lower side of the floor pan of the vehicle, and which can reduce noise over a wide frequency band that enters the passenger compartment from under the floor without increasing mass or adding components. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a battery-equipped vehicle of a first aspect of the present invention comprises a battery pack mounted on the vehicle lower side of the floor pan of the passenger compartment, a body frame member having a vertical wall facing the peripheral wall of the battery pack in the horizontal direction of the vehicle across a gap, and an expansion chamber that, in a cross-sectional view seen from the horizontal direction of the vehicle, is constituted by at least one of an inner recess formed in the peripheral wall of the battery pack so as to be recessed inward in the horizontal direction of the vehicle and an outer recess formed in the vertical wall of the body frame member so as to be recessed outward in the horizontal direction of the vehicle.

[0007] According to the first aspect of the invention, in a cross-sectional view taken from the horizontal direction of the vehicle, the peripheral wall of the battery pack mounted on the vehicle lower side of the floor pan of the vehicle compartment and the vertical wall of the vehicle body frame member face each other in the horizontal direction of the vehicle across a gap. An extension chamber is formed in at least one of an inner recess formed in the peripheral wall of the battery pack so as to be recessed inward in the horizontal direction of the vehicle and an outer recess formed in the vertical wall of the vehicle body frame member so as to be recessed outward in the horizontal direction of the vehicle. In other words, the peripheral wall of the battery pack, the vertical wall of the vehicle body frame member, and the extension chamber form an expansion-type sound-absorbing structure due to the change in the passage cross-sectional area. Therefore, noise (sound waves) over a wide frequency range entering the vehicle compartment from under the floor are reflected and interfered with inside the extension chamber, thereby being reduced (attenuated). Thus, according to the present invention, in a configuration in which the battery pack is mounted on the vehicle lower side of the floor pan, noise over a wide frequency range entering the vehicle compartment from under the floor is reduced without increasing mass or adding components.

[0008] In addition, a second aspect of the battery-equipped vehicle according to the present invention is a battery-equipped vehicle according to the first aspect, in which, when viewed in a cross-sectional view from the horizontal direction of the vehicle, a protrusion that protrudes downward from the vehicle is formed on the upper edge of at least one of the inner recess of the battery pack and the outer recess of the body frame member that constitute the expansion chamber.

[0009] According to the second aspect of the invention, in a cross-sectional view taken from the horizontal direction of the vehicle, a protruding portion that protrudes downward from the upper edge of at least one of the inner recess of the battery pack and the outer recess of the body frame member that constitute the extension chamber is formed. Therefore, noise (sound waves) over a wide frequency range that enters the vehicle interior from under the floor is more effectively reflected and interfered with inside the extension chamber from which the protruding portion protrudes, thereby being silenced (attenuated). This further reduces noise over a wide frequency range that enters the vehicle interior from under the floor.

[0010] Furthermore, a third aspect of the battery-equipped vehicle according to the present invention is a battery-equipped vehicle according to the first aspect, in which, when viewed in a cross-sectional view from the horizontal direction of the vehicle, a protrusion that protrudes in the horizontal direction of the vehicle is formed in at least one of the inner recess of the battery pack that constitutes the expansion chamber and the outer recess of the body frame member.

[0011] According to the third aspect of the invention, in a cross-sectional view seen from the horizontal direction of the vehicle, a protrusion that protrudes in the horizontal direction of the vehicle is formed on at least one of the inner recess of the battery pack that constitutes the extension chamber and the outer recess of the body frame member. Therefore, noise (sound waves) over a wide frequency band that enters the vehicle interior from under the floor is more effectively reflected and interfered with inside the extension chamber from which the protrusion protrudes, thereby being silenced (attenuated). This further reduces noise over a wide frequency band that enters the vehicle interior from under the floor.

[0012] Furthermore, a fourth aspect of the battery-equipped vehicle according to the present invention comprises a battery pack mounted on the vehicle lower side of the floor pan of the passenger compartment, a body frame member having a vertical wall facing the peripheral wall of the battery pack in the horizontal direction of the vehicle across a gap, an inner passage formed on the peripheral wall of the battery pack so as to detour inward in the horizontal direction of the vehicle in a cross-sectional view seen from the horizontal direction of the vehicle, and an outer passage formed on the vertical wall of the body frame member so as to detour outward in the horizontal direction of the vehicle in a cross-sectional view seen from the horizontal direction of the vehicle, wherein the inner passage and the outer passage are offset in the vertical direction of the vehicle so as not to overlap each other.

[0013] According to the fourth aspect of the invention, in a cross-sectional view taken from the horizontal direction of the vehicle, the peripheral wall of the battery pack mounted on the vehicle lower side of the floor pan of the vehicle compartment and the vertical wall of the vehicle body frame member face each other in the horizontal direction of the vehicle across a gap. An inner passage formed on the peripheral wall of the battery pack to detour inward in the horizontal direction of the vehicle and an outer passage formed on the vertical wall of the vehicle body frame member to detour outward in the horizontal direction of the vehicle are offset in the vertical direction of the vehicle so as not to overlap each other. Therefore, noise (sound waves) over a wide frequency band entering the vehicle compartment from under the floor is silenced (attenuated) by interference between the sound waves that pass between the peripheral wall of the battery pack and the vertical wall of the vehicle body frame member and the sound waves that pass through the inner and outer passages that merge. Thus, according to the present invention, in a configuration in which the battery pack is mounted on the vehicle lower side of the floor pan, noise over a wide frequency band entering the vehicle compartment from under the floor is reduced without increasing mass or adding components. [Effects of the Invention]

[0014] As described above, according to the present invention, in a configuration in which a battery pack is mounted on the vehicle's lower side of the floor pan, noise over a wide frequency band that enters the vehicle interior from under the floor can be reduced without increasing mass or adding components. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic plan view showing a battery-equipped vehicle according to an embodiment of the present invention; [Figure 2] 2 is a schematic cross-sectional view taken along the line XX in FIG. 1, showing the first embodiment. [Figure 3] FIG. 2 is a schematic cross-sectional view taken along the line XX in FIG. 1, showing a first modified example of the first embodiment. [Figure 4] FIG. 2 is a schematic cross-sectional view taken along the line XX in FIG. 1, showing a second modified example of the first embodiment. [Figure 5] FIG. 2 is a schematic cross-sectional view taken along the line XX in FIG. 1, showing a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the arrow UP shown in each drawing indicates the upward direction of the vehicle, the arrow FR indicates the forward direction of the vehicle, and the arrow RH indicates the rightward direction of the vehicle. Therefore, in the following description, unless otherwise specified, when the up / down, front / rear, and left / right directions are mentioned, they refer to the up / down, front / rear, and left / right directions of the vehicle. Furthermore, the direction perpendicular to the up / down direction of the vehicle is the horizontal direction of the vehicle, and the left / right direction is synonymous with the vehicle width direction.

[0017] First Embodiment First, a first embodiment will be described. As shown in Fig. 1, in a battery-equipped vehicle 10 such as an electric vehicle, a battery pack (battery unit) 30 is mounted on the lower side of a floor pan 14 (see Fig. 2) that constitutes the floor of a vehicle interior 12 (see Fig. 2). The battery pack 30 is formed in a flat, approximately rectangular parallelepiped shape with the longitudinal direction being the front-to-rear direction, and is mounted across approximately the entire surface of the floor pan 14.

[0018] More specifically, a pair of left and right rockers 20 are disposed on the outer side of the floor pan 14 in the vehicle width direction. A front cross member 16 having a rectangular closed cross section and extending in the vehicle width direction is installed at the front ends of the left and right rockers 20, and a rear cross member 18 having a rectangular closed cross section and extending in the vehicle width direction is installed at the rear ends of the left and right rockers 20. The battery pack 30 is disposed between the pair of left and right rockers 20, and between the front cross member 16 and the rear cross member 18.

[0019] That is, the front cross member 16 faces the battery pack 30 from the front side across a gap G1, the rear cross member 18 faces the battery pack 30 from the rear side across a gap G2, and the left and right rockers 20 each face the battery pack 30 from the outside in the vehicle width direction across a gap G3. The front cross member 16, rear cross member 18, and the pair of left and right rockers 20 are all body frame members of the battery vehicle 10.

[0020] The pair of left and right rockers 20 are formed by extrusion molding of a light metal such as an aluminum alloy, and have a generally rectangular closed cross-sectional shape extending in the front-to-rear direction (the front-to-rear direction being the longitudinal direction). The rockers 20 are formed in a symmetrical shape, and Fig. 2 shows the left rocker 20.

[0021] As shown in Figure 2, the rocker 20 has an upper wall portion 22 and a lower wall portion 24 arranged opposite each other in the vertical direction, an outer wall portion 26 that vertically connects the outer ends of the upper wall portion 22 and the lower wall portion 24 in the vehicle width direction, and an inner wall portion 28 that vertically connects the inner ends of the upper wall portion 22 and the lower wall portion 24 in the vehicle width direction.

[0022] A rectangular flat rib 22A protruding upward is integrally formed near the center of the upper wall 22 in the vehicle width direction, and a rectangular flat rib 24A protruding downward is integrally formed near the center of the lower wall 24 in the vehicle width direction. Each of the ribs 22A, 24A is used as a joint with peripheral components (pillars, etc., not shown). The upper rib 22A is used to attach a weatherstrip, not shown.

[0023] 2, the outer wall portion 26 extends in the up-down direction, and the inner wall portion 28 is bent in a crank shape (stepped shape). That is, the inner wall portion 28 is composed of an upper vertical wall 28A extending downward from the inner end portion in the vehicle width direction of the upper wall portion 22, an intermediate horizontal wall 28B extending inward in the vehicle width direction from the lower end portion of the upper vertical wall 28A, and a lower vertical wall 28C serving as a vertical wall extending downward from the inner end portion in the vehicle width direction of the intermediate horizontal wall 28B.

[0024] This lower vertical wall 28C is configured to face an outer wall 48 (described later) of the peripheral wall 40 of the battery pack 30 across a gap G3 in the vehicle width direction (horizontal direction of the vehicle). An outer recess 52 that is recessed in a substantially rectangular shape outward in the vehicle width direction (horizontal direction of the vehicle) in a cross section viewed from the front-rear direction (horizontal direction of the vehicle) is formed in approximately the center in the up-down direction of this lower vertical wall 28C.

[0025] In addition, in a cross-sectional view seen from the front-rear direction, the lower end of the lower vertical wall 28C is inclined obliquely and continues to the vehicle width direction inner end of the lower wall portion 24, but it may be bent at a substantially right angle and continue to the vehicle width direction inner end of the lower wall portion 24. The length in the up-down direction of the lower vertical wall 28C is set to be longer than the length in the up-down direction of the upper vertical wall 28A. Furthermore, because the inner wall portion 28 is bent in a crank shape, the length in the vehicle width direction of the upper wall portion 22 is set to be shorter than the length in the vehicle width direction of the lower wall portion 24.

[0026] The outer end of the floor pan 14 in the vehicle width direction is overlapped on the upper surface of the intermediate horizontal wall 28B of the inner wall portion 28. The floor pan 14 is formed by pressing a plate made of the same light metal (e.g., aluminum alloy) as the material of the rocker 20, and is joined to the intermediate horizontal wall 28B by joining means such as spot welding. If the floor pan 14 is made of a plate made of a material different from the material of the rocker 20 (e.g., steel plate), it is joined to the intermediate horizontal wall 28B by joining means such as bolts and nuts or rivets.

[0027] The battery pack 30 includes a battery case 34 formed in a generally rectangular box shape that is flat in the vertical direction and whose longitudinal direction is in the front-to-rear direction, and a plurality of battery modules 32 housed inside the battery case 34. Each battery module 32 is composed of a plurality of rectangular storage batteries. The battery case 34 also includes a bottom plate 36 on which the plurality of battery modules 32 are placed, a peripheral wall 40 erected on the periphery of the bottom plate 36, and a top plate (lid) 38 whose periphery is fastened to an upper wall portion 42 (described later) of the peripheral wall 40.

[0028] The bottom plate 36 is press-formed from a light metal plate such as an aluminum alloy into a generally rectangular flat plate with the longitudinal direction being the front-to-rear direction, and the lower surface of a lower wall portion 44 (described later) of the peripheral wall 40 is joined and fixed to the upper surface of the peripheral edge thereof by joining means such as welding. A pair of left and right fixing flange portions 36A extend integrally from both ends of the bottom plate 36 in the vehicle width direction, projecting outward in the vehicle width direction beyond left and right side wall portions 40A (outer walls 48) (described later) of the peripheral wall 40.

[0029] Each fixing flange portion 36A is placed on the lower surface of the bottom wall portion 24 of each rocker 20 and is fastened and fixed with bolts 66 and weld nuts 68. Specifically, each fixing flange portion 36A has a plurality of through holes 36B formed in a row in the front-rear direction. Further, in the bottom wall portion 24 of the rocker 20, a plurality of through holes 24B are formed in a row in the front-rear direction, and weld nuts 68 are provided so as to be coaxial with each through hole 24B.

[0030] Therefore, each fixing flange portion 36A is coupled and fixed to each rocker 20 by inserting a bolt 66 from below into the through-hole 36B and the through-hole 24B and screwing it into a weld nut 68. In other words, the battery pack 30 (battery case 34) is supported by a pair of rockers 20 on the left and right.

[0031] The top plate 38 is formed by pressing a plate made of a light metal such as an aluminum alloy into a roughly rectangular flat plate with the longitudinal direction being the front-to-rear direction, and its peripheral portion is superimposed on the upper surface of the upper wall portion 42 of the peripheral wall 40, which will be described later, and is fastened and fixed with a plurality of bolts 66.

[0032] The peripheral wall 40 is constructed by bending a long molded product formed by extrusion molding of a light metal such as an aluminum alloy into an approximately rectangular frame shape and joining one end and the other end to each other, and as described above, the lower surface of the lower wall portion 44, which will be described later, is joined and fixed to the upper surface of the peripheral portion of the bottom plate 36 by welding or the like.

[0033] The peripheral wall 40 is formed in a substantially "B" shape in a cross section seen from the circumferential direction. That is, the peripheral wall 40 has an upper wall portion 42, a lower wall portion 44, an inner wall 46, and an outer wall 48, and a partition wall 47 is provided integrally with the upper wall portion 42 and the lower wall portion 44 in approximately the middle in the up-down direction of the inner wall 46 and the outer wall 48 and parallel to the upper wall portion 42 and the lower wall portion 44. The partition wall 47 divides (compartments) the interior of the peripheral wall 40 into an upper space and a lower space.

[0034] An inner recess 54 that is recessed inward in the vehicle width direction in a substantially rectangular shape in a cross section viewed from the front-to-rear direction is formed in the approximate vertical center of the outer wall 48 of a pair of left and right side wall portions 40A opposing each other in the vehicle width direction of the peripheral wall 40. In other words, the outer recess 52 formed in the lower vertical wall 28C and the inner recess 54 formed in the outer wall 48 face each other at the same height position in the vehicle width direction, thereby forming an extension chamber 50 that is substantially rectangular in a cross section viewed from the front-to-rear direction.

[0035] At the lower and upper sides of the extension chamber 50, the portions formed by the lower vertical wall 28C and the outer wall 48, which face each other with a gap G3 between them, function as communicating pipes 56, 58, respectively, which lead to the extension chamber 50. In other words, the communicating pipe 56, the extension chamber 50, and the communicating pipe 58 form an expandable sound-absorbing structure that varies the cross-sectional area of ​​the passage.

[0036] Here, the theoretical formula for sound volume reduction R is shown below, assuming that the horizontal cross-sectional area of ​​the extension chamber 50 is S, the horizontal cross-sectional area of ​​the communicating pipes 56, 58 is S0, the vertical length of the extension chamber 50 is L, the frequency is f, and the speed of sound is c. If S / S0=m and 2πf / c=k, the theoretical formula is as follows:

[0037] R=10×log(1+((m-1 / m) 2 sin 2 kL) / 4)

[0038] Next, the operation of the battery-equipped vehicle 10 according to the first embodiment configured as above will be described.

[0039] 2, in a cross-sectional view seen from the front-rear direction, the lower vertical wall 28C of the locker 20 and the outer wall 48 of the battery case 34 face each other across a gap G3 in the vehicle width direction. The outer recess 52 formed in the lower vertical wall 28C and the inner recess 54 formed in the outer wall 48 face each other in the vehicle width direction at the same height position, thereby forming an extension chamber 50. A communicating pipe 56 is formed between the lower vertical wall 28C on the lower side of the extension chamber 50 and the outer wall 48, and a communicating pipe 58 is formed between the lower vertical wall 28C on the upper side of the extension chamber 50 and the outer wall 48.

[0040] In other words, as described above, an expansion-type sound-absorbing structure due to the change in the passage cross-sectional area is formed by the communicating pipe 56, the extension chamber 50, and the communicating pipe 58. Therefore, noise (sound waves) in a wide frequency band (not limited to a limited frequency band), such as road noise and wind noise, which enters the vehicle interior 12 from under the floor through the communicating pipe 56, is silenced (attenuated) by reflection and interference inside the extension chamber 50, which is provided midway along the noise's entry path.

[0041] In this manner, in a configuration in which the battery pack 30 is mounted below the floor pan 14, noise over a wide frequency band that enters the vehicle interior 12 from under the floor can be reduced without increasing mass or adding components (such as sealing parts that suppress or prevent noise transmission), thereby improving comfort inside the vehicle interior 12. Furthermore, compared to cases in which an increase in mass or an addition of components is required, an increase in manufacturing costs can be avoided.

[0042] Furthermore, by forming outer recesses 52 in lower vertical wall 28C of rocker 20, a so-called bead shape is formed in lower vertical wall 28C. This improves the rigidity of lower vertical wall 28C and prevents cross-sectional collapse of rocker 20 during a collision. Furthermore, because no sound-absorbing through-holes are formed in outer wall 48 of peripheral wall 40, there is no risk of moisture entering the interior of peripheral wall 40, and there is no risk of rust (corrosion) occurring inside battery pack 30.

[0043] (First Modification) The shape of the extension chamber 50 is not limited to the shape shown in Fig. 2. The shape of the extension chamber 50 may be, for example, the shape shown in Fig. 3. That is, in a cross-sectional view seen from the front-to-rear direction, a protruding portion 52A that protrudes downward (into the extension chamber 50) may be formed integrally with the upper edge of the outer recess 52, and a protruding portion 54A that protrudes downward (into the extension chamber 50) may be formed integrally with the upper edge of the inner recess 54 (a so-called muffler structure may be formed).

[0044] With such overhanging portions 52A and 54A formed, noise (sound waves) in a wide frequency band (not limited to a specific frequency band) that enters from under the floor through the communicating pipe 56 can be more effectively reflected and interfered with inside the extension chamber 50 from which the overhanging portions 52A and 54A extend, thereby being silenced (attenuated). Therefore, noise in a wide frequency band that enters the passenger compartment 12 from under the floor can be further reduced.

[0045] (Second Modification) The shape of the extension chamber 50 may be, for example, the shape shown in Fig. 4. That is, in a cross-sectional view seen from the front-rear direction, a substantially "T"-shaped protrusion 52B protruding inward in the vehicle width direction (into the extension chamber 50) may be integrally formed at approximately the center in the vertical direction of the bottom surface of the outer recess 52 on the outer side in the vehicle width direction, and a substantially "T"-shaped protrusion 54B protruding outward in the vehicle width direction (into the extension chamber 50) may be integrally formed at approximately the center in the vertical direction of the bottom surface of the inner recess 54 on the inner side in the vehicle width direction (a so-called muffler structure may be formed).

[0046] When such protrusions 52B and 54B are formed, noise (sound waves) in a wide frequency band (not limited to a specific frequency band) that enters from under the floor through the communicating pipe 56 can be more effectively reflected and interfered with inside the extension chamber 50 from which the protrusions 52B and 54B protrude, thereby being silenced (attenuated). Therefore, noise in a wide frequency band that enters the passenger compartment 12 from under the floor can be further reduced.

[0047] Second Embodiment Next, a second embodiment will be described. Note that the same reference numerals are used to designate the same parts as those in the first embodiment, and detailed descriptions (including common functions) will be omitted as appropriate.

[0048] 5, in a cross section seen from the front-rear direction, a passage 60 is formed between the lower vertical wall 28C and the outer wall 48, and, separate from the passage 60, an outer passage 62 that detours outward in the vehicle width direction is formed in the lower vertical wall 28C, and an inner passage 64 that detours inward in the vehicle width direction is formed in the outer wall 48. The outer passage 62 and the inner passage 64 are offset in the vertical direction so as not to overlap each other in a front view or a side view.

[0049] Specifically, the outer passage 62 is formed in the upper part of the lower vertical wall 28C, and a lower inlet 62A and an upper outlet 62B of the outer passage 62 are arranged to face the upper part of the outer wall 48 in the vehicle width direction. The inner passage 64 is formed in the lower part of the outer wall 48, and a lower inlet 64A and an upper outlet 64B of the inner passage 64 are arranged to face the lower part of the lower vertical wall 28C in the vehicle width direction. In other words, the upper outlet 64B of the inner passage 64 and the lower inlet 62A of the outer passage 62 are offset in the vertical direction so as not to face each other.

[0050] As a result, sound waves that enter the passage 60 from below (under the floor) branch off and enter the inner passage 64 from the lower entrance 64A, and when the branched sound waves emerge into the passage 60 from the upper exit 64B, they merge with the sound waves that have passed through the passage 60, causing interference and muffling (attenuation).Furthermore, the sound waves that have passed through the passage 60 branch off and enter the outer passage 62 from the lower entrance 62A, and when the branched sound waves emerge into the passage 60 from the upper exit 62B, they merge with the sound waves that have passed through the passage 60, causing interference and muffling (attenuation).

[0051] That is, in the second embodiment, an interference-type sound-absorbing structure is configured in which sound waves of opposite phases due to differences in propagation paths interfere with each other to reduce noise, and noise (sound waves) in a wide frequency band (not limited to a specific frequency band) such as road noise and wind noise that enter from under the floor through the passage 60 are interfered with and reduced (attenuated) by passing through the passage 60, the inner passage 64, and the outer passage 62. Therefore, in a configuration in which the battery pack 30 is mounted below the floor pan 14, noise in a wide frequency band that enters the vehicle interior 12 from under the floor can be reduced without increasing mass or adding components, thereby improving the comfort of the vehicle interior 12.

[0052] Although the battery-powered vehicle 10 according to this embodiment has been described above with reference to the drawings, the battery-powered vehicle 10 according to this embodiment is not limited to the one shown in the drawings, and the design can be modified as appropriate within the scope of the gist of the present invention. For example, the rocker 20 is not limited to a configuration formed by extrusion molding.

[0053] The extension chamber 50 may be configured with at least one of an outer recess 52 formed in the lower vertical wall 28C of the rocker 20 and an inner recess 54 formed in the outer wall 48 of the side wall portion 40A. The outer recess 52 and the outer passage 62 may be formed in the rear wall serving as a vertical wall of the front cross member 16 or the front wall serving as a vertical wall of the rear cross member 18, rather than in the lower vertical wall 28C of the rocker 20. In that case, the inner recess 54 and the inner passage 64 are formed in the outer wall 48 of the front wall portion and the outer wall 48 of the rear wall portion of the peripheral wall 40, respectively. [Explanation of symbols]

[0054] 10 Battery-powered vehicles 12 Cabin 14 Floor pan 20 Rocker (body frame member) 28C Lower vertical wall (vertical wall) 30 Battery Pack 40 Peripheral wall 50 Expansion Room 52 outer recess 52A Overhang 52B Protrusion 54 Inner recess 54A Zhang Chubu 54B Protrusion 62 Lateral pathway 64. Medial pathway

Claims

[Claim 1] A battery pack mounted on the lower side of the vehicle in the floor pan of the passenger compartment; a vehicle body frame member having a vertical wall facing a peripheral wall of the battery pack across a gap in a horizontal direction of the vehicle; an inner passage formed in a peripheral wall of the battery pack so as to detour inward in the vehicle horizontal direction in a cross-sectional view seen from the vehicle horizontal direction; an outer passage formed in a vertical wall of the vehicle body frame member so as to detour outward in the vehicle horizontal direction in a cross-sectional view seen from the vehicle horizontal direction; Equipped with The battery-equipped vehicle has the inner passage and the outer passage offset in the vertical direction of the vehicle so as not to overlap each other.

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