Integration structure and battery pack integration method

Abstract

To provide an integrated structure and a method for integrating battery packs allowing battery packs for a vehicle to be integrated in a more compact manner.SOLUTION: An integrated structure 1 in which rectangular battery packs 300 for a vehicle are integrated in a thickness direction, comprises: frame members 30 that are attached to both sides in a width direction of each battery pack 300, and extend in a lengthwise direction of the battery pack 300; column members 10 that are provided on four corners of the integrated battery packs 300, and extend in a vertical direction; and a plurality of spacer members 20 that are attached to the column members 10 at a distance in the vertical direction, and to which the frame members 30 are fixed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an integration structure and a method for integrating a battery pack. [Background technology]

[0002] Conventionally, so-called cubicle-type high-voltage power receiving facilities have been widely used. For example, Patent Document 1 discloses a cubicle monitoring system in which a storage battery is installed in a cubicle as a power source for driving a load during a power outage, and remote monitoring of the cubicle can be continued even if the power outage is prolonged. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-88715 Summary of the Invention [Problem to be solved by the invention]

[0004] Battery packs for electric vehicles (hereafter simply referred to as vehicle battery packs) are said to reach the end of their lifespan when their battery capacity reaches around 70%. In other words, even used vehicle battery packs still have 70% remaining capacity, so they can be fully reused for ESS (energy storage) applications, including home use.

[0005] A specific example of the reuse of a battery pack for a used vehicle is its use as a storage battery for a cubicle-type high-voltage power receiving facility.

[0006] However, because vehicle battery packs are heavy, when vehicle battery packs are used as storage batteries in cubicle-type high-voltage power receiving equipment, the vehicle battery packs are stored on pallets, shelves, or frames. With this storage method, the pallets, shelves, or frames are placed between adjacent vehicle battery packs, which causes the cubicle-type high-voltage power receiving equipment to become large.

[0007] The present invention has been made in view of the above circumstances, and has an object to provide an integration structure and a battery pack integration method that enable vehicle battery packs to be integrated more compactly. [Means for solving the problem]

[0008] The integrated structure of the present invention is an integrated structure in which rectangular vehicle battery packs are integrated in the thickness direction, and includes frames attached to both sides of each battery pack in the width direction and extending in the length direction of the battery pack, columns provided near the four corners of the integrated battery packs and extending in the vertical direction, and a plurality of spacers attached to the columns at vertical intervals and to which the frames are fixed.

[0009] The battery pack assembly method of the present invention is a battery pack assembly method for accumulating rectangular vehicle battery packs in the thickness direction using columns extending in the vertical direction, each of which is provided at a position corresponding to the vertex of a rectangle in a plan view, and spacers attached to the columns at vertical intervals, in which frames extending in the length direction of the battery pack are attached to both sides of the width direction of each battery pack, the battery packs are lifted using lifting holes formed in the frames, the battery packs are placed between the four columns, and the frames are fixed to the spacers. [Effects of the Invention]

[0010] According to the present invention, an integration structure and a battery pack integration method can be realized that integrate vehicle battery packs more compactly, and ultimately, by using such an integration structure in a cubicle-type high-voltage power receiving equipment, the cubicle-type high-voltage power receiving equipment can be made more compact. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an illustrative diagram showing an example of high-voltage power receiving equipment according to an embodiment of the present invention; [Figure 2] 1 is a front view of an integrated structure of a high-voltage power receiving facility according to an embodiment of the present invention. [Figure 3] 1 is a plan view of an integrated structure of a high-voltage power receiving facility according to an embodiment of the present invention. [Figure 4] 1 is a side view of an integrated structure of a high-voltage power receiving facility according to an embodiment of the present invention. [Figure 5] 1A-1C are front, top, bottom, and side views showing a column member of an accumulation structure. [Figure 6] 1A-1C are front, top, and side views showing a frame member of an integrated structure. [Figure 7] 1A-1C are front, top, and side views showing a spacer member of an integrated structure. [Figure 8] 10A and 10B are diagrams illustrating an attachment state of a frame member, a spacer member, and a column member when battery packs are integrated. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment thereof, taking a cubicle-type high-voltage power receiving facility as an example.

[0013] FIG. 1 is an illustrative diagram showing an example of a high-voltage power receiving facility 100 according to this embodiment. The high-voltage power receiving equipment 100 includes a battery panel 200 that houses a battery and a power control panel C that houses a battery PCS (Power Conditioning System) (not shown) in a metal housing. The battery panel 200 is provided with, for example, two integrated structures 1 in which a plurality of battery packs for used electric vehicles (EVs) are integrated.

[0014] Fig. 2 is a front view of the integrated structure 1 of the high-voltage power receiving equipment 100 according to this embodiment, Fig. 3 is a plan view of the integrated structure 1 of the high-voltage power receiving equipment 100, and Fig. 4 is a side view of the integrated structure 1 of the high-voltage power receiving equipment 100. As described above, in the integrated structure 1, a plurality of battery packs 300 are integrated at equal intervals in the thickness direction of the battery packs 300, i.e., in the vertical direction.

[0015] As shown in Fig. 3, the battery pack 300 is substantially rectangular in plan view, and bracket plates 302, 301 for fixing the battery pack 300 to a vehicle are provided on both sides in the width direction. The bracket plates 302 and 301 have different shapes. The battery pack 300 has one bracket plate 302 and two bracket plates 301, and the bracket plates 302 and 301 are provided in this order from the front side, with a predetermined distance between them. In the length direction, the bracket plates 302 and 301 are provided at both ends of the battery pack 300, respectively, and the bracket plate 301 is provided in the middle portion.

[0016] Each bracket plate 301 has a flat plate shape that is generally rectangular in plan view, and protrudes perpendicularly from the lower end of a side surface of the battery pack 300 in the width direction of the battery pack 300. Each bracket plate 301 also has a through-hole 301A.

[0017] Bracket plate 302 has a flat plate shape that is approximately trapezoidal in plan view, and protrudes perpendicularly from the lower end of a side surface of battery pack 300 in the width direction of battery pack 300. The dimension of bracket plate 302 in the protruding direction is longer than that of bracket plate 301. Bracket plate 302 also has a through-hole 302A.

[0018] The integrated structure 1 comprises four column members 10 respectively provided near the four corners of the integrated battery packs 300, two frame members 30 attached to both sides of the width of each battery pack 300 and extending in the length direction of the battery pack 300, and a plurality of spacer members 20 attached to the column members 10 spaced apart in the vertical direction and to which the frame members 30 are fixed.

[0019] FIG. 5 shows a front view, a plan view, a bottom view, and a side view of a column member 10 of the integrated structure 1. FIG. 5A is a front view of the column member 10, FIG. 5B is a plan view of the column member 10, FIG. 5C is a bottom view of the column member 10, and FIG. 5D is a side view of the column member 10. For convenience, the middle portion of the column member 10 is omitted in FIG. 5. Since each column member 10 has the same shape, only one column member 10 will be described below.

[0020] The column members 10 are made of metal, extend in the vertical direction, and are generally gutter-shaped. Each column member 10 has a gutter-shaped portion 10A to which a spacer member 20 is fixed. As shown in Figure 3, each column member 10 is provided so that the gutter-shaped portion 10A opens outward in the width direction of the battery pack 300.

[0021] The gutter-shaped portion 10A has two opposing side walls 12, 13 and a bottom plate 11 interposed between the side walls 12, 13 and connecting the inner edges of the side walls 12, 13 (see FIG. 3). The side walls 13 of the column members 10 face each other in the longitudinal direction of the battery pack 300, and a reinforcing portion 14 is provided continuously at the outer edge of the side wall 13 of each column member 10 to increase the strength of the gutter-shaped portion 10A. The reinforcing portion 14 is strip-shaped and protrudes parallel to the bottom plate 11. The side walls 12, 13, the bottom plate 11, and the reinforcing portion 14 are integrally formed.

[0022] The bottom plate 11 is provided with a plurality of pairs of through holes 111 for fixing the spacer members 20, including a pair of through holes 111 formed spaced apart in the length direction of the column member 10, i.e., in the vertical direction. The through holes 111 are, for example, circular. The plurality of pairs of through holes 111 are formed at equal intervals in the vertical direction.

[0023] Of the multiple pairs of through holes 111, the pair of through holes 111 formed at the top is spaced apart from the upper end of the bottom plate 11 by a dimension slightly longer than the thickness of the battery pack 300. Furthermore, of the multiple pairs of through holes 111, the pair of through holes 111 formed at the lower end of the bottom plate 11 has a lower through hole 111A that is oval in shape. The side walls 12, 13 and the reinforcing portion 14 are formed with a plurality of circular through holes for fastening to other members.

[0024] 3, of the four column members 10, a pair of column members 10 arranged at the end sides in the length direction of the battery pack 300 face each other in the width direction of the battery pack 300. More specifically, the pair of column members 10 have bottom plates 11 to which spacer members 20 are fixed that face each other.

[0025] Figure 6 shows a front view, a plan view, and a side view of a frame member 30 of the integrated structure 1. Figure 6A is a front view of the frame member 30, Figure 6B is a plan view of the frame member 30, and Figure 6C is a side view of the frame member 30. For convenience, the middle portion of the frame member 30 is omitted in Figure 6. Since each frame member 30 has the same shape, only one frame member 30 will be described below.

[0026] The frame members 30 are made of metal, extend horizontally, and are generally trough-shaped. Each frame member 30 has a trough-shaped mounting portion 30A to which a battery pack 300 (bracket plates 302, 301) is fixed. As shown in Figure 2, each frame member 30 is provided so that the mounting portion 30A is open to the battery pack 300 side.

[0027] The mounting portion 30A has two side walls 32, 33 (opposing walls) that face each other in the vertical direction, and a bottom plate 31 that is interposed between the side walls 32, 33 and connects the outer edges of the side walls 32, 33 (see FIG. 2). A band-shaped portion 34 extends upward from the upper end of the mounting portion 30A. That is, the band-shaped portion 34 is connected to the inner edge of the upper side wall 33 (the upper opposing wall) of the two side walls 32, 33, and the band-shaped portion 34 protrudes upward parallel to the bottom plate 31. The side walls 32, 33, the bottom plate 31, and the band-shaped portion 34 are integrally formed.

[0028] 3, the side wall 32 (the lower opposing wall) has a band shape extending along the length of the battery pack 300, and the inner edge, i.e., the edge of one side facing the battery pack 300, is bent downward to increase strength. In addition, the bottom plate 31 is provided on the other outer edge of the side wall 32, extending perpendicularly to the side wall 32 up to the side wall 33, as described above.

[0029] Furthermore, the side wall 32 has through holes 320, 323 (fourth holes) formed at both ends in the length direction for fixing to the spacer member 20. The through hole 323 is formed at one end closer to the front of the battery pack 300, and the through hole 320 is provided at the other end.

[0030] Then, through holes 321, 322 (first holes) for fixing the battery pack 300 are formed in the side wall 32. The through holes 321, 322 are formed at positions corresponding to the through hole 301A of the bracket plate 301 and the through hole 302A of the bracket plate 302 of the battery pack 300, respectively. The through hole 321 is formed slightly away from the through hole 320, and the through hole 322 is formed near the through hole 323. In other words, the through hole 321 is formed closer to the one edge of the side wall 32, and the through hole 322 is formed closer to the other edge of the side wall 32.

[0031] Furthermore, collars 321A and 322A are respectively protruding from the upper surface of the side wall 32 at positions corresponding to the through holes 321 and 322. The collars 321A and 322A are cylindrical in shape with an inner diameter the same as that of the through holes 321 and 322, and are spacers interposed between the bracket plates 302 and 301 and the upper surface of the side wall 32 (through holes 321 and 322), respectively.

[0032] As shown in Fig. 3, the side wall 33 has a band shape extending along the length of the battery pack 300. As described above, the band-shaped portion 34 is connected to the inner edge of the side wall 33, i.e., one edge on the battery pack 300 side, and the bottom plate 31 is connected to the other outer edge, as described above. The width of the side wall 33 is shorter than that of the side wall 32. In other words, the side wall 32 protrudes more toward the battery pack 300 than the side wall 33 (see Fig. 3).

[0033] Three through holes 331, 332, and 333 are formed in the side wall 33. From the front side of the battery pack 300, the through hole 333 (fifth hole), the through hole 332 (third hole), and the through hole 331 (fifth hole) are formed in this order. The through hole 331 and the through hole 333 are formed at both end portions of the side wall 33, respectively, and the through hole 332 is formed near the through hole 333. The through holes 331, 332, and 333 are formed at positions that align with the through holes 320, 322, and 323 of the side wall 32 in the up-down direction, respectively. The through holes 331, 332, and 333 are circular and have the same size but a larger diameter than the through holes 320, 322, and 323 of the side wall 32.

[0034] As described above, the band-shaped portion 34 is connected to the one edge of the side wall 33 and protrudes upward parallel to the bottom plate 31. Two through holes 341, 342 (second holes) are formed in the band-shaped portion 34. The through holes 341, 342 are formed near the through holes 322, 321 of the side wall 32, i.e., near the collars 322A, 321A, respectively. The through holes 341, 342 are used to lift the battery pack 300, as will be described later.

[0035] 7A and 7B are front, plan, and side views showing spacer members 20 of integrated structure 1. Fig. 7A is a front view of spacer member 20, Fig. 7B is a plan view of spacer member 20, and Fig. 7C is a side view of spacer member 20. Since each spacer member 20 has the same shape, only one spacer member 20 will be described below.

[0036] As described above, the spacer member 20 is attached to the column member 10, and the frame member 30 is fixed to the spacer member 20. The spacer member 20 is made of metal.

[0037] The spacer member 20 has a rectangular plate portion 21 that is screwed to the bottom plate 11 of the column member 10. The rectangular plate portion 21 has a rectangular plate shape that extends in the vertical direction, and the width dimension of the rectangular plate portion 21 is equal to or less than the width dimension of the bottom plate 11 of the column member 10. The rectangular plate portion 21 has two first through holes 211, and the two first through holes 211 have the same size and are formed spaced apart in the vertical direction.

[0038] The fixing plate portion 22 extends from the upper edge of the rectangular plate portion 21 in the thickness direction of the rectangular plate portion 21, i.e., toward the battery pack 300. The fixing plate portion 22 has a rectangular plate shape and has the same width dimension as the rectangular plate portion 21. A second through-hole 221 is formed in the center of the fixing plate portion 22. The second through-hole 221 is circular and is used to fix the frame member 30, as described below.

[0039] A triangular rib 23 is provided between the rectangular plate portion 21 and the fixed plate portion 22. More specifically, the triangular rib 23 has a triangular plate shape with a base that is a straight line connecting the protruding tip of the fixed plate portion 22 and the lower end of the rectangular plate portion 21. That is, the triangular rib 23 is formed from one long side of the rectangular plate portion 21 to one long side of the fixed plate portion 22 that corresponds to the one long side. In other words, the triangular rib 23 is connected to the one long side of the rectangular plate portion 21 and the one long side of the fixed plate portion 22. The rectangular plate portion 21, the fixed plate portion 22, and the triangular rib 23 are integrally formed.

[0040] In the integrated structure 1 of this embodiment having the above-described configuration, a frame member 30 is attached to each side of the width of the battery pack 300, a spacer member 20 is attached to the column member 10, and both ends of the frame member 30 are fixed to the two spacer members 20, so that the battery packs 300 are integrated with the thickness direction being the vertical direction.

[0041] FIG. 8 is a diagram showing the attachment state of the frame member 30, the spacer member 20, and the column member 10 when the battery packs 300 are integrated. The method for integrating the battery pack 300 will be described in detail below with reference to FIGS.

[0042] First, a first operation is performed in which the spacer members 20 are attached to the column members 10 (see FIGS. 2, 4, 5, 7, and 8 below). At this time, the four column members 10 are fixed inside the housing of the high-voltage power receiving equipment 100 so as to form a rectangle in a plan view.

[0043] The rectangular plate portion 21 of the spacer member 20 is placed against the bottom plate 11 of the column member 10 from the outside of the gutter-shaped portion 10A so that the two first through holes 211 of the rectangular plate portion 21 of the spacer member 20 are aligned with either pair of through holes 111 of the column member 10. In this state, a bolt B is inserted from the inside of the gutter-shaped portion 10A into the through hole 111 of the bottom plate 11 and the first through hole 211 of the rectangular plate portion 21, and comes out of the first through hole 211. A nut N is fitted onto the end of the come-out bolt B, completing the screw fastening. This operation is repeated for each pair of through holes 111 for each column member 10.

[0044] 2, the spacer members 20 are provided on the bottom plate 11 of each column member 10 so as to protrude toward the opposing column member 10. At this time, the fixing plate portion 22 of each spacer member 20 is substantially horizontal.

[0045] Next, the second operation of attaching the frame member 30 to the battery pack 300 is performed (see FIGS. 3, 6, and 8 below). The bracket plates 302, 301 of the battery pack 300 are placed inside the mounting portion 30A of the frame member 30. At this time, the through-hole 301A of the bracket plate 301 is aligned with the position of the through-hole 321 (collar 321A) of the frame member 30, and the through-hole 302A of the bracket plate 302 is aligned with the position of the through-hole 322 (collar 322A) of the frame member 30.

[0046] In this state, bolt B is inserted into through-hole 321 from the underside of side wall 32 of frame member 30 (mounting portion 30A), passes through collar 321A, and comes out of through-hole 301A of bracket plate 301. A nut N is fitted onto the end of bolt B that has come out, completing the screw fastening.

[0047] Furthermore, bolt B is inserted into through-hole 322 from the underside of side wall 32 of frame member 30 (mounting portion 30A), passes through collar 322A, and comes out through through-hole 302A of bracket plate 302. A nut N is fitted onto the end of the bolt B that has come out, completing the screw fastening. Because through-hole 302A of bracket plate 302 is disposed further back in mounting portion 30A than through-hole 301A of bracket plate 301, the fitting of nut N is performed using through-hole 332 of side wall 33. In the second operation, the frame members 30 are attached to both sides of the battery pack 300.

[0048] Then, a third operation is performed in which the frame member 30 is fixed to the spacer member 20 (see FIGS. 2 and 3). As described above, in the second operation, with the frame members 30 attached to both sides of the battery pack 300, a crane is used to carry the battery pack 300 with the frame members 30 into the housing of the high-voltage power receiving equipment 100. More specifically, with the roof of the housing of the high-voltage power receiving equipment 100 removed, the battery pack 300 with the frame members 30 is carried from above the housing into the inside of the rectangle defined by the four column members 10.

[0049] In this way, when the crane carries the battery pack 300 with the frame members 30, the hook H of the crane is hooked into each of the through-holes 341, 342 of the frame members 30 of the battery pack 300, as shown in Fig. 8. That is, the hook H of the crane is hooked into each of the four through-holes 341, 342 of the two frame members 30, and the battery pack 300 with the frame members 30 is lifted up.

[0050] Thereafter, the battery pack 300 with the frame members 30 attached thereto is lifted and carried between the four column members 10, and both ends of each frame member 30 are fixed to the spacer members 20, respectively.

[0051] The battery pack 300 with the first frame member 30 is carried to the position of the lowest spacer member 20. First, one end of the frame member 30 is aligned with the corresponding spacer member 20 of the column member 10 on the front side of the battery pack 300. That is, the through-hole 323 at one end of the frame member 30 is aligned with the second through-hole 221 in the fixing plate portion 22 of the corresponding spacer member 20. Next, the bolt B is inserted into the second through-hole 221 from the underside of the fixing plate portion 22 of the spacer member 20 and comes out through the through-hole 323 in the side wall 32 of the frame member 30 (mounting portion 30A). A nut N is fitted onto the end of the bolt B that has come out, completing the screw fastening. Because the through-hole 323 of the frame member 30 is disposed on the far side of the mounting portion 30A as described above, the fitting operation of the nut N is performed using the through-hole 333 in the side wall 33.

[0052] Next, similarly to the one end, the other end of the frame member 30 is aligned with the corresponding spacer member 20 of the column member 10 on the back side of the battery pack 300 and screwed in place. When screwing in the other end of the frame member 30, the nuts N are fitted into the through holes 331 in the side walls 33. The frame members 30 on both sides of the battery pack 300 are fixed to the spacer members 20 in this manner.

[0053] Once the fixing of the battery pack 300 with the first frame member 30 is completed through the first to third operations described above, the battery pack 300 with the second frame member 30 is fixed to the second-lowest four spacer members 20, and the battery pack 300 with the third frame member 30 is fixed to the third-lowest four spacer members 20. By repeating these first to third operations for each battery pack 300, the integration of the battery packs 300 is completed, and the integrated structure 1 of the high-voltage power receiving equipment 100 according to the present invention is completed.

[0054] The above has been described using an example in which the second work is performed after the first work, but this is not limited to this, and the order of the first work and the second work may be reversed.

[0055] With the above-described configuration, the integrated structure 1 according to this embodiment can compactly integrate the battery packs 300 without using pallets, shelves, or frame assembly. Furthermore, by employing such an integrated structure 1, the high-voltage power receiving equipment 100 can also be made more compact.

[0056] Furthermore, in the integrated structure 1 of this embodiment, as described above, with the frame member 30 attached to the battery pack 300, the battery pack 300 is lifted by hooking the crane hook H through the through holes 341, 342 of the frame member 30, thereby facilitating the assembly work of the battery pack 300.

[0057] Furthermore, in the integrated structure 1 according to this embodiment, as described above, the leading end of the side wall 33 of the frame member 30 (mounting portion 30A) is set back in a direction away from the battery pack 300 more than the leading end of the side wall 32. This ensures a gap between the band-shaped portion 34 of the frame member 30, to which the crane hook H is attached, and the battery pack 300 (see FIG. 8). This makes it easier to attach the crane hook H to the frame member 30, and prevents collision between the crane hook H and the battery pack 300.

[0058] Furthermore, in the integrated structure 1 according to this embodiment, as described above, the through holes 331, 332, and 333 in the side wall 33 are circular and have a larger diameter than the through holes 320, 322, and 323 in the side wall 32, and are formed at positions that align in the vertical direction with the through holes 320, 322, and 323 in the side wall 32. Therefore, when attaching the frame member 30 to the spacer member 20, the nut N can be fitted through the through holes 331 and 333, and when fixing the bracket plate 302 of the battery pack 300 to the frame member 30, the nut N can be fitted through the through hole 332, improving workability.

[0059] The above describes an example in which six spacer members 20 are attached to each column member 10 in the integrated structure 1 of this embodiment, but this is not limited to this, and the number of spacer members 20 can be increased or decreased as needed.

[0060] The technical features (constituent elements) described in this embodiment can be combined with each other, and by combining them, new technical features can be conceived. The embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims.

[0061] Independent and dependent claims may be combined with each other in any and all combinations, regardless of the reference format. Furthermore, while the claims may be written in a format in which a claim references two or more other claims (multiple claim format), this is not a limitation. Multiple claims that reference at least one other multiple claim (multiple multiple claim format) may also be written. [Explanation of symbols]

[0062] 1: integrated structure, 10: column member, 11: bottom plate, 20: spacer member, 21: rectangular plate portion, 22: fixed plate portion, 30: frame member, 30A: mounting portion, 32, 33: side walls (opposing walls), 34: band-shaped portion, 211: first through hole, 221: second through hole, 300: battery pack, 302, 301: bracket plate, 320, 323: through hole (fourth hole), 321, 322: through hole (first hole), 332: through hole (third hole), 341, 342: through hole (second hole), 331, 333: through hole (fifth hole)

Claims

1. An integrated structure in which rectangular vehicle battery packs are integrated in the thickness direction, a frame attached to both sides of each battery pack in the width direction and extending in the length direction of the battery pack; columns provided near four corners of the integrated battery packs and extending in the up-down direction; a plurality of spacers attached to each column at intervals in the vertical direction and fixed only to ends of the frame; The frame is a first hole used for attachment to the battery pack; and a second hole used for lifting the battery pack.

2. The frame is a gutter-shaped mounting portion in which the first hole is formed and which is open on the battery pack side; a band-shaped portion in which the second hole is formed and which extends upward from an upper end edge of the mounting portion, The battery pack Bracket plates having through holes are provided on both sides in the width direction, 2. The integrated structure according to claim 1, wherein the bracket plate is disposed inside the mounting portion of the frame and fixed to the mounting portion.

3. An integrated structure as described in claim 2, wherein of the two opposing walls of the mounting portion that face each other in the vertical direction, the first hole is formed in the lower opposing wall, and a third hole is formed in the upper opposing wall at a position corresponding to the first hole.

4. The frame is a fourth hole in the lower opposing wall for fastening to the spacer; 4. The integrated structure according to claim 3, wherein a fifth hole is formed in the upper opposing wall at a position corresponding to the fourth hole.

5. Each of the plurality of spacers comprises: a rectangular plate portion having two first through holes formed spaced apart in the vertical direction and screwed to the column; The integrated structure according to claim 1 , further comprising a fixing plate portion protruding from an upper edge of the rectangular plate portion in a thickness direction of the rectangular plate portion and having a second through hole for screwing the frame.

6. The column has a gutter shape extending in the vertical direction, The integrated structure according to claim 5 , wherein the pair of columns provided at the longitudinal end sides of the battery pack have bottom plates, to which the rectangular plate portions of the spacers are screwed, facing each other.

7. A battery pack integration method for integrating rectangular vehicle battery packs in a thickness direction using columns that are provided at positions corresponding to vertices of a rectangle in a plan view and extend in a vertical direction, and spacers that are attached to the columns at intervals in the vertical direction, a frame extending in a length direction of each battery pack is attached to both sides in a width direction of the battery pack; Lifting the battery pack using the lifting holes formed in the frame and disposing the battery pack between the four columns; The frame is fixed to the spacer. Battery pack integration method.

Images