Housing, energy storage element unit, building, and method for manufacturing the energy storage element unit

Abstract

To attach a housing of a power storage element unit to a wall of a building in a manner that the housing has resistance against vibration.SOLUTION: A housing houses a power storage element module and is fixed to a wall of a building. The housing includes: an attachment wall portion facing the wall; and a frame part having an attachment wall portion frame part to which the attachment wall portion is attached. The attachment wall portion has: an attachment wall portion body provided with multiple through holes and having an attachment surface configured to contact with the wall; and a pair of connection members connected to the attachment wall portion body and the attachment wall portion frame part. Each of the pair of connection members has: a first connection part connected to the attachment wall portion body; a second connection part connected to the attachment wall portion frame part; and a connection part which connects the first connection part with the second connection part. The connection part has: a surface with which the first connection part of the attachment wall portion body is connected; a surface with which the second connection part of the attachment wall portion frame part is connected; and a surface forming an angle relative to a horizontal surface.SELECTED DRAWING: Figure 4

Description

Technical Field

[0006] , , ,

[0001] The present disclosure relates to a housing, a power storage element unit, a building, and a method for manufacturing a power storage element unit.

Background Art

[0002] For example, as disclosed in Patent Document 1, a power storage element unit having a plurality of power storage element modules is known. The power storage element unit includes a housing that houses the plurality of power storage element modules together with the plurality of power storage element modules.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, it has been required to install the housing of the power storage element unit so as to have resistance to vibration. In particular, when the power storage element unit is arranged inside a building, it may be required to attach the housing to the wall of the building. Even in such a case, it has been required to install the housing of the power storage element unit so as to have resistance to vibration.

[0005] The present disclosure has been made in consideration of such circumstances, and an object thereof is to attach the housing of the power storage element unit to the wall of a building so as to have resistance to vibration.

Means for Solving the Problems

[0006] A first aspect of the present disclosure is a housing that houses a power storage element module and is fixed to a wall of a building, an attachment wall portion facing the wall, and a frame portion having a mounting wall portion frame portion to which the mounting wall portion is attached. The mounting wall portion comprises a mounting wall portion body having a plurality of through holes and a mounting surface in contact with the wall, and a pair of connecting members connected to the mounting wall portion body and the mounting wall portion frame. Each of the pair of connecting members has a first connecting portion connected to the mounting wall body, a second connecting portion connected to the mounting wall frame, and a connecting portion that connects the first connecting portion and the second connecting portion. The connecting portion is a housing having a surface to which the first connecting portion of the mounting wall body is connected, a surface to which the second connecting portion of the mounting wall frame is connected, and a surface that forms an angle with respect to the horizontal plane.

[0007] A second aspect of the present disclosure is the housing according to the first aspect described above, wherein the mounting wall body has a projection that protrudes toward the inside of the housing, The mounting wall frame portion may be provided with an opening into which the projection portion is inserted.

[0008] A third aspect of this disclosure is a housing according to the first or second aspect described above, wherein the upper end of the mounting wall body overlaps the mounting wall frame from the outside of the housing. The mounting wall portion may further include an upper end support member that is attached to the mounting wall portion body, overlaps the mounting wall portion frame portion from the inside of the housing, and overlaps the upper end of the mounting wall portion body.

[0009] A fourth aspect of this disclosure is that, in the housing according to each of the first to third aspects described above, the distance between the mounting surface and the bottom surface of the housing in the vertical direction may be 50 mm or more.

[0010] A fifth aspect of this disclosure is a housing according to each of the first to fourth aspects described above, wherein the mounting surface may be located on the outside of the housing in the thickness direction of the mounting wall portion, at least 10 mm below the portion of the mounting wall portion frame portion in the vertical direction compared to the mounting surface.

[0011] A sixth aspect of this disclosure is a housing according to each of the first to fifth aspects described above, The energy storage element module housed in the aforementioned enclosure, The energy storage element unit comprises a plurality of screws that pass through all or selected portions of the plurality of through holes from the inside of the housing and are screwed to the wall.

[0012] A seventh aspect of this disclosure is an energy storage element unit according to the sixth aspect described above, It is a building comprising the aforementioned wall and

[0013] An eighth aspect of this disclosure is a method for manufacturing an energy storage element unit mounted on the wall of a building, The energy storage element unit comprises a housing, an energy storage element module housed in the housing, and a plurality of screws. The housing has a mounting wall portion facing the wall and a frame portion having a mounting wall portion frame portion to which the mounting wall portion is attached. The mounting wall portion comprises a mounting wall portion body having a plurality of through holes and a mounting surface in contact with the wall, and a pair of connecting members connected to the mounting wall portion body and the mounting wall portion frame. Each of the pair of connecting members has a first connecting portion connected to the mounting wall body, a second connecting portion connected to the mounting wall frame, and a connecting portion that connects the first connecting portion and the second connecting portion. The connecting portion has a surface to which the first connecting portion of the mounting wall body is connected, a surface to which the second connecting portion of the mounting wall frame is connected, and a surface that forms an angle with respect to the horizontal plane. The method for manufacturing an energy storage element unit includes a screw fastening step of fastening the plurality of screws through each of the plurality of through holes, or a portion selected from the plurality of through holes, from the inside of the housing and fastening them to the wall. [Effects of the Invention]

[0014] According to the present disclosure, the housing of the power storage element unit can be attached to the wall of a building so as to be resistant to vibration.

Brief Description of the Drawings

[0015] [Figure 1] FIG. 1 is a diagram for explaining an embodiment, and is a perspective view showing a power storage element unit. [Figure 2] FIG. 2 is a perspective view showing the inside of the power storage element unit of FIG. 1. [Figure 3] FIG. 3 is a perspective view showing a frame portion of the housing of the power storage element unit of FIG. 1. [Figure 4] FIG. 4 is a perspective view showing the housing of the power storage element unit of FIG. 1. [Figure 5] FIG. 5 is a perspective view showing an attachment wall portion of the housing of FIG. 4. [Figure 6] FIG. 6 is a partial cross-sectional view showing a part of the cross-section of the housing along the line A-A of FIG. 4 in an enlarged manner. [Figure 7] FIG. 7 is a partial cross-sectional view showing a part of the cross-section of the housing along the line B-B of FIG. 4 in an enlarged manner. [Figure 8] FIG. 8 is a partial cross-sectional view showing a part of the cross-section of the housing along the line B-B of FIG. 4 in an enlarged manner. <00​​​​​​​​​​​​​​Figures 1 to 8 are diagrams illustrating one embodiment according to the present disclosure. Of these, Figure 1 is a perspective view showing the energy storage element unit 10, and Figure 2 is a perspective view showing the inside of the energy storage element unit 10. Note that in Figure 2, the upper wall portion 13b and two of the side wall portions 13c (the ones located on the front side in Figure 2) are omitted from the illustration.

[0019] To clarify the directional relationships between drawings, some drawings use arrows to indicate the first direction DA, the second direction DB, and the third direction DC as common directions across the drawings. The tip of the arrow corresponds to one side of each direction DA, DB, and DC, SA1, SB1, and SC1, respectively. Additionally, arrows pointing towards the back of the drawing, perpendicular to the plane of the paper, are indicated by a symbol consisting of an X inside a circle, as shown in Figure 6, for example.

[0020] In the illustrated example, the first direction DA, the second direction DB, and the third direction DC are perpendicular to each other. The first direction DA is also parallel to the vertical direction. One side SA1 in the first direction DA is the lower side in the vertical direction, and the other side opposite to that side is the upper side in the vertical direction. The direction perpendicular to the vertical direction is also called the horizontal direction. In the illustrated example, the horizontal direction is perpendicular to the first direction DA, which is parallel to the vertical direction. The second direction DB and the third direction DC correspond to the horizontal direction.

[0021] The energy storage element unit 10 is used as a rechargeable secondary battery unit. The illustrated energy storage element unit 10 is an indoor-installation energy storage element unit 10 and is applied to buildings, especially houses. The energy storage element unit 10 is electrically connected to the building's wiring and functions as a power source for electrical devices installed within the building.

[0022] As shown in Figures 1 and 2, the energy storage element unit 10 comprises a housing 11 and energy storage element modules 20 housed in the housing 11. In the example shown in Figure 2, the energy storage element unit 10 comprises a plurality of energy storage element modules 20 housed in the housing 11. The energy storage element unit 10 also comprises a plurality of screws 72, as will be described later. The energy storage element unit also comprises a control module 14.

[0023] The housing 11 of the energy storage element unit 10 is attached to the wall 81 of the building 80. In the example shown in Figure 1, the building 80 comprises a floor 82 and a wall 81 rising from the floor 82. In the example shown in Figure 1, the building 80 further comprises a baseboard 83 attached to the wall 81 and extending along the connection between the wall 81 and the floor 82. The housing 11 is positioned on the floor 82 and attached to the wall 81 of the building 80. The energy storage element unit 10 can be considered as part of the building 80. In this case, it can be said that the building 80 comprises the energy storage element unit 10 and the wall 81.

[0024] First, let's describe the housing 11. The housing 11 houses the energy storage element module 20 and is attached to the wall 81 of the building 80. The housing 11 has a mounting wall portion 13a facing the wall 81. In the example shown in Figures 1 and 2, the housing 11 has a plurality of wall portions 13 and a frame portion 12 that connects adjacent wall portions 13. The housing 11 has a mounting wall portion 13a as one of the plurality of wall portions 13. The plurality of wall portions 13 and the frame portion 12 form the space for arranging the control module 14 and the energy storage element module 20.

[0025] In the example shown in Figure 1, the housing 11 has a roughly rectangular shape including a bottom surface 11d, a top surface 11b, and four side surfaces 11c. The bottom surface 11d is a roughly rectangular surface located on one side SA1 in the first direction DA. The top surface 11b is a roughly rectangular surface facing the bottom surface 11d in the first direction DA. The bottom surface 11d and the top surface 11b each have a pair of long sides 111 extending in the third direction DC and a pair of short sides 112 extending in the second direction DB perpendicular to the third direction DC. The side surfaces 11c are surfaces that connect to the edge of the bottom surface 11d at their edges. In the example shown in Figure 1, the four side surfaces 11c are roughly rectangular surfaces that each connect to the edge located on one side of the bottom surface 11d and the edge located on one side of the top surface 11b at their edges. The side surfaces 11c are perpendicular to the bottom surface 11d. In the example shown in Figure 1, the four sides 11c are perpendicular to the bottom surface 11d and the top surface 11b. For example, the bottom surface 11d is a surface parallel to the horizontal direction.

[0026] The housing 11 shown in Figure 1 comprises a mounting wall 13a, an upper wall 13b, and three side wall sections 13c as wall sections 13. In the example shown in Figure 1, the multiple wall sections 13 are each independent members. The mounting wall 13a forms one of the side surfaces 11c of the housing 11. In the example shown in Figure 1, the mounting wall 13a forms the side surface 11c of the housing 11 located on one side SB1 in the second direction DB. The three side wall sections 13c form the side surfaces 11c of the housing 11 other than the side surface 11c formed by the mounting wall 13a. The upper wall 13b forms the top surface 11b of the housing 11. In the example shown in Figure 1, the bottom surface 11d of the housing 11 is formed by a frame section 12. Although not shown, the bottom surface 11d of the housing 11 may be formed by wall sections 13 different from the mounting wall 13a, the upper wall section 13b, and the side wall sections 13c.

[0027] In this embodiment, as shown in Figure 1, each of the multiple wall sections 13 is an independent member that is generally plate-shaped as a whole. Each of the multiple wall sections 13 is connected to the edge of an adjacent wall section 13 via a frame section 12 at the edge of the wall section 13. The connection of the edges of the multiple wall sections 13 forms a housing 11 having a storage space for housing multiple energy storage element modules 20.

[0028] The frame portion 12 is a member that connects adjacent wall portions 13. In the example shown in Figure 2, the frame portion 12 constitutes the sides of the housing 11, which has a roughly rectangular parallelepiped shape. The frame portion 12 is made of the same material as, for example, the metal plates 92 of the upper wall portion 13b and the side wall portion 13c, which will be described later.

[0029] In this embodiment, the frame portion 12 connects the upper wall portion 13b and the mounting wall portion 13a, connects the upper wall portion 13b to each of the three side wall portions 13c, connects the mounting wall portion 13a to the side wall portions 13c, and connects adjacent side wall portions 13c. Figure 3 is a perspective view showing the frame portion 12 of the housing 11. In the example shown in Figure 3, the frame portion 12 has a rectangular frame-shaped first frame portion 12a with a substantially L-shaped cross-section that extends between the upper wall portion 13b and the mounting wall portion 13a and between the upper wall portion 13b and the three side wall portions 13c, and four rod-shaped second frame portions 12b with a substantially L-shaped cross-section that extend between adjacent side wall portions 13c. The first frame portion 12a and each of the four second frame portions 12b are fixed to each other at the corners of the upper surface 11b. In the example shown in Figure 3, the frame portion 12 further has a third frame portion 12c that forms the bottom surface 11d of the housing 11. The third frame portion 12c and each of the four second frame portions 12b are fixed to each other at the corners of the bottom surface 11d.

[0030] In this embodiment, the third frame portion 12c is composed of a laminate made of a first metal plate 12d and a second metal plate 12e located inside the housing 11, relative to the first metal plate 12d. The first metal plate 12d and the second metal plate 12e each have a substantially plate-like shape. The first metal plate 12d and the second metal plate 12e are fixed to each other. For example, the first metal plate 12d and the second metal plate 12e are fixed to each other by screwing through holes in the first metal plate 12d into screw holes in the second metal plate 12e.

[0031] The first metal plate 12d of the third frame portion 12c has a flat first metal plate body portion 12f and a first metal plate edge portion 12g provided around the first metal plate body portion 12f and forming an angle with respect to the first metal plate body portion 12f. In the example shown in Figure 3, the first metal plate body portion 12f and the first metal plate edge portion 12g are perpendicular to each other. In the example shown in Figure 3, the first metal plate body portion 12f and the first metal plate edge portion 12g are formed as a single unit. More specifically, a single flat metal material is folded to form the first metal plate 12d having the first metal plate body portion 12f and the first metal plate edge portion 12g.

[0032] The second metal plate 12e of the third frame portion 12c has a flat second metal plate body portion 12h and a second metal plate edge portion 12i provided around the second metal plate body portion 12h and forming an angle with respect to the second metal plate body portion 12h. In the example shown in Figure 3, the second metal plate body portion 12h and the second metal plate edge portion 12i are perpendicular to each other. In the example shown in Figure 3, a part of the second metal plate edge portion 12i overlaps the first metal plate edge portion 12g from the inside of the housing 11. In the example shown in Figure 3, the second metal plate body portion 12h and the second metal plate edge portion 12i are formed as a single unit. More specifically, a single flat metal material is folded to form the second metal plate 12e having the second metal plate body portion 12h and the second metal plate edge portion 12i. The first metal plate edge 12g and the second metal plate edge 12i together are referred to as the edge 12j of the third frame portion 12c. In the example shown in Figure 3, the edge 12j is a plate-shaped portion perpendicular to the bottom surface 11d of the housing 11.

[0033] The upper wall portion 13b is attached to the portion of the first frame portion 12a, which has a roughly L-shaped cross-section, that faces the upper wall portion 13b. In particular, the upper wall portion 13b is attached to the portion of the first frame portion 12a, which has a roughly L-shaped cross-section, that has a surface parallel to the upper surface 11b of the housing 11. Each of the three side wall portions 13c is attached to the portion of the edge portion 12j of the first frame portion 12a, the second frame portion 12b, and the third frame portion 12c, which have a roughly L-shaped cross-section, that faces each of the side wall portions 13c. In particular, each of the three side wall portions 13c is attached to the portion of the edge portion 12j of the first frame portion 12a, the second frame portion 12b, and the third frame portion 12c, which have a roughly L-shaped cross-section, that has a surface parallel to the side surface 11c formed by each of the side wall portions 13c. The mounting wall portion 13a is attached to the portion of the edge portion 12j of the first frame portion 12a, the second frame portion 12b, and the third frame portion 12c, which have a substantially L-shaped cross-section, that faces the mounting wall portion 13a. In particular, the mounting wall portion 13a is attached to the portion of the edge portion 12j of the second frame portion 12b and the third frame portion 12c, which have a substantially L-shaped cross-section, that has a surface parallel to the side surface 11c formed by the mounting wall portion 13a.

[0034] The portion of the frame portion 12 to which the mounting wall portion 13a is attached is referred to as the mounting wall portion frame portion 12k. The frame portion 12 shown in Figure 3 can be said to have a mounting wall portion frame portion 12k to which the mounting wall portion 13a is attached. In the example shown in Figure 3, the mounting wall portion frame portion 12k is a rectangular frame-shaped portion formed from the portion of the first frame portion 12a that is located on the opposite side of the second direction DB from one side SB1 and has a surface perpendicular to the second direction DB, the portions of the two second frame portions 12b that are located on the opposite side of the second direction DB from one side SB1 and have surfaces perpendicular to the second direction DB, and the edge portion 12j of the third frame portion 12c that is located on the opposite side of the second direction DB from one side SB1 and has a surface perpendicular to the second direction DB.

[0035] In the example shown in Figure 3, the mounting wall frame portion 12k is provided with an opening 12n. In particular, the mounting wall frame portion 12k is provided with multiple openings 12n. The openings 12n are provided in the portion of the second frame portion 12b that forms the mounting wall frame portion 12k. Of the two second frame portions 12b that form the mounting wall frame portion 12k, the second frame portion 12b located on one side SC1 in the third direction DC is referred to as the first mounting wall side end frame portion 12b1. Also, of the two second frame portions 12b that form the mounting wall frame portion 12k, the second frame portion 12b located on the opposite side of the one side SC1 in the third direction DC is referred to as the second mounting wall side end frame portion 12b2. In this case, the openings 12n are provided in the portions of the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2 that face the mounting wall portion 13a. In this embodiment, three openings 12n are provided in the vertical direction (first direction DA) of each of the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2, in the portion facing the mounting wall portion 13a. In the example shown in Figure 3, the openings 12n penetrate the second frame portion 12b. The projections 75d of the mounting wall portion body 75, which will be described later, are inserted into the openings 12n.

[0036] Next, the mounting wall portion 13a will be described in more detail. Figure 4 is a perspective view of the housing 11 of the energy storage element unit 10 shown in Figure 1, viewed from the side facing the wall 81 of the building 80 (one side SB1 in the second direction DB). In Figure 4, the upper wall portion 13b and the decorative panel 19, which will be described later, are not shown. Figure 5 is a perspective view of the mounting wall portion 13a viewed from the inside of the housing 11 (from the side opposite to one side SB1 in the second direction DB). Figure 5 also shows multiple screws 72 that pass through multiple through holes 71 provided in the mounting surface 73 from the inside of the housing 11, along with the mounting wall portion 13a. The mounting wall portion 13a includes a mounting wall portion body 75 having multiple through holes 71 and a mounting surface 73 in contact with the wall 81, and a pair of connecting members 76 connected to the mounting wall portion body 75 and the mounting wall portion frame portion 12k. In the example shown in Figure 5, the mounting wall portion 13a further includes an upper end support member 78 attached to the mounting wall portion body 75. The housing 11 of this embodiment is attached to the wall 81 by screws 72 that pass through through holes 71 provided in the mounting surface 73 and are screwed to the wall 81.

[0037] In the example shown in Figure 4, the mounting surface 73 is a flat surface parallel to the first direction DA and the third direction DC. This allows the mounting surface 73 to contact a flat wall 81 that is parallel to the first direction DA and the third direction DC. In the examples shown in Figures 4 and 5, the mounting wall portion 13a includes a mounting wall portion body 75 and a pair of connecting members 76 connected to the mounting wall portion body 75 and the mounting wall portion frame portion 12k. The mounting wall portion body 75 forms the mounting surface 73.

[0038] Figure 6 is a magnified partial cross-sectional view of the enclosure 11 along line AA in Figure 4, showing the area near the second frame portion 12b, which is located on the opposite side of one side SB1 in the second direction DB and one side SC1 in the third direction DC. Figure 6 also shows a cross-section of a building 80 having a wall 81 to which the enclosure 11 is attached. In Figure 6, the side wall portion 13c is omitted from the illustration. In the example shown in Figure 6, the second frame portion 12b, the mounting wall portion body 75, and the connecting member 76 are stacked in this order from the inside of the enclosure 11. They are fixed to each other by a first screw 121 that passes through the mounting wall portion body 75 and the connecting member 76, and by a second screw 122 that passes through the second frame portion 12b and the connecting member 76.

[0039] The form of the mounting surface 73 is not particularly limited as long as it can contact the wall 81. In the example shown in Figure 4, the mounting wall body 75 further has linear recesses 77 that are recessed toward the inside of the housing 11 and extend horizontally. The mounting wall body 75 has a plurality of linear recesses 77. In the example shown in Figure 4, the mounting wall body 75 has three linear recesses 77. In the example shown in Figure 4, the portion of the mounting wall body 75 where no linear recesses 77 are formed forms the mounting surface 73.

[0040] The horizontal dimension w1 of the linear recess 77 is at least 0.5 times the horizontal dimension w2 of the mounting wall portion 13a. In the example shown in Figure 4, dimension w1 is the dimension of the linear recess 77 in a direction parallel to the horizontal and parallel to the mounting surface 73. Also, dimension w2 is the dimension of the mounting wall portion 13a in a direction parallel to the horizontal and parallel to the mounting surface 73. Furthermore, the dimension w1 of the linear recess 77 in a direction parallel to the horizontal and parallel to the mounting surface 73 is at least 0.5 times the dimension w2 of the mounting wall portion 13a in a direction parallel to the horizontal and parallel to the mounting surface 73 (third direction DC).

[0041] Although not shown in the figures, the mounting surface 73 may be divided into multiple parts by the portion of the mounting wall 13a that does not come into contact with the wall 81. For example, the mounting wall 13a may have multiple linear protrusions that project toward the wall 81 and extend horizontally. The mounting surface 73 may be formed by the surfaces of the multiple linear protrusions. In this case, each of the multiple linear protrusions may have a flat surface parallel to the first direction DA and the third direction DC, and the flat surface of each of the multiple linear protrusions may form the mounting surface 73. In this case, because the mounting surface 73 is formed by the surfaces of each of the multiple linear protrusions, the mounting surface 73 is divided into multiple parts by the portion of the mounting wall 13a that does not come into contact with the wall 81.

[0042] In the example shown in Figure 4, the through holes 71 are provided in the portion of the mounting wall body 75 that forms the mounting surface 73. In the example shown in Figure 4, multiple through holes 71 are provided in the portion of the mounting wall body 75 that forms the mounting surface 73, aligned in the first direction D1 and the third direction D3. The number of through holes 71 provided in the mounting surface 73 is appropriately selected according to the number of screws 72 expected to be used when attaching the housing 11 to the wall 81 of the building 80. In the example shown in Figure 4, the mounting wall 13a has four rows of through holes 71, each row of four through holes 71 aligned in the third direction D3. These rows of four through holes 71 are aligned in the first direction D1. Therefore, the mounting surface 73 of the mounting wall 13a has a total of 16 through holes 71.

[0043] Figure 7 is a partial cross-sectional view showing an enlarged view of the area near the part of the first frame portion 12a that forms the mounting wall portion frame portion 12k, along the line BB in Figure 4. Figure 8 is a partial cross-sectional view showing an enlarged view of the area near the part of the third frame portion 12c that forms the mounting wall portion frame portion 12k, along the line BB in Figure 4. Figures 7 and 8 also show a cross-section of a building 80 having a wall 81 to which the housing 11 is attached. In addition, the upper wall portion 13b, the side wall portion 13c, and the decorative panel 19, which will be described later, are not shown in Figures 7 and 8. In the example shown in Figure 7, the upper end 75a of the mounting wall portion body 75 overlaps the mounting wall portion frame portion 12k from the outside of the housing 11. In particular, the upper end 75a of the mounting wall portion body 75 overlaps the mounting wall portion frame portion 12k from the outside of the housing 11 in the thickness direction (second direction DB) of the mounting wall portion 13a. In particular, the upper end 75a of the mounting wall body 75 is in contact with the mounting wall frame portion 12k from the outside of the housing 11. In the example shown in Figure 7, the upper end 75a of the mounting wall body 75 overlaps with the portion of the first frame portion 12a that forms the mounting wall frame portion 12k from the outside of the housing 11. Also, in the example shown in Figure 8, the lower end 75b of the mounting wall body 75 overlaps with the mounting wall frame portion 12k from the inside of the housing 11. In particular, the lower end 75b of the mounting wall body 75 overlaps with the mounting wall frame portion 12k in the thickness direction (second direction DB) of the mounting wall portion 13a from the inside of the housing 11. In particular, the lower end 75b of the mounting wall body 75 is in contact with the mounting wall frame portion 12k from the inside of the housing 11. In the example shown in Figure 7, the lower end 75b of the mounting wall body 75 overlaps the portion of the third frame portion 12c that forms the mounting wall frame portion 12k from the inside of the housing 11. As shown in Figure 6, each of the pair of side ends 75c of the mounting wall body 75, that is, each of the horizontal ends of the mounting wall body 75, may also overlap the mounting wall frame portion 12k from the outside of the housing 11. In this embodiment, each of the pair of side ends 75c of the mounting wall body 75 overlaps the portion of the second frame portion 12b that forms the mounting wall frame portion 12k from the outside of the housing 11.

[0044] As shown in Figure 5, the dimension w4 of the lower end 75b of the mounting wall body 75 in the direction parallel to the mounting surface 73 and parallel to the horizontal plane (third direction DC) is less than or equal to the distance w7 between the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2 in the direction parallel to the mounting surface 73 and parallel to the horizontal plane, as shown in Figure 3.

[0045] As shown in Figures 5 and 6, the mounting wall body 75 has projections 75d that protrude toward the inside of the housing 11. In the examples shown in Figures 5 and 6, the projections 75d protrude along the thickness direction (second direction DB) of the mounting wall 13a. In the example shown in Figure 5, the mounting wall body 75 has multiple projections 75d. Of the pair of side ends 75c of the mounting wall body 75, the side end 75c located on one side SC1 in the third direction DC is referred to as the first side end 75c1. Also, of the pair of side ends 75c of the mounting wall body 75, the side end 75c located on the opposite side from the one side SC1 in the third direction DC is referred to as the second side end 75c2. In this case, the projections 75d are located near the first side end 75c1 and the second side end 75c2, respectively. In particular, the projections 75d are located in the vicinity of the first side end 75c1 and the second side end 75c2, in portions that overlap with the mounting wall frame portion 12k. The mounting wall body 75 has a total of six projections 75d, three in the vicinity of the first side end 75c1 and three in the vicinity of the second side end 75c2. The three projections 75d located near the first side end 75c1 and the three projections 75d located near the second side end 75c2 are arranged in the vertical direction (first direction DA).

[0046] Furthermore, as described above, the mounting wall frame portion 12k is provided with an opening 12n into which the projection 75d is inserted. As described above, in the example shown in Figure 3, each of the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2 has three openings 12n arranged in the vertical direction (first direction DA) in the portion facing the mounting wall portion 13a. Each of the three projections 75d located near the first side end 75c1 is inserted into each of the three openings 12n provided in the first mounting wall side end frame portion 12b1. Similarly, each of the three projections 75d located near the second side end 75c2 is inserted into each of the three openings 12n provided in the second mounting wall side end frame portion 12b2.

[0047] In the example shown in Figure 6, the width w9 of the projection 75d in the direction parallel to the mounting surface 73 and the horizontal plane (third direction DC) is smaller than the width w10 of the opening 12n into which the projection 75d is inserted, in the direction parallel to the mounting surface 73 and the horizontal plane. Note that the horizontal plane is a hypothetical plane parallel to the horizontal direction.

[0048] Next, the pair of connecting members 76 will be described. The connecting members 76 are members that connect the mounting wall body 75 and the mounting wall frame 12k. In this embodiment, the mounting wall body 75 and the mounting wall frame 12k are not directly connected, nor are they connected via any member other than the connecting members 76.

[0049] As shown in Figures 5 and 6, each of the pair of connecting members 76 has a first connecting portion 76a connected to the mounting wall body 75, a second connecting portion 76b connected to the mounting wall frame 12k, and a connecting portion 76c connecting the first connecting portion 76a and the second connecting portion 76b. In the example shown in Figures 5 and 6, the first connecting portion 76a, the second connecting portion 76b, and the connecting portion 76c are formed as a single unit. More specifically, a single flat metal material is bent to form a connecting member 76 having the first connecting portion 76a, the second connecting portion 76b, and the connecting portion 76c. The boundary between the first connecting portion 76a and the connecting portion 76c is formed by the bend 76g of the connecting member 76 made of the flat metal material. The boundary between the second connecting portion 76b and the connecting portion 76c is formed by the bend 76h of the connecting member 76 made of the flat metal material.

[0050] In the example shown in Figure 5, the pair of connecting members 76 sandwich the portion of the mounting wall body 75 that forms the mounting surface 73 in the horizontal direction. In particular, the pair of connecting members 76 sandwich the portion of the mounting wall body 75 that forms the mounting surface 73 in a direction parallel to the horizontal direction and parallel to the mounting surface 73 (third direction DC).

[0051] Here, the mounting wall body 75 has a surface 76d to which the first connecting portion 76a is connected. The mounting wall frame 12k has a surface 76e to which the second connecting portion 76b is connected. The pair of connecting members 76 have a surface 76d to which the first connecting portion 76a of the mounting wall body 75 is connected, a surface 76e to which the second connecting portion 76b of the mounting wall frame 12k is connected, and a surface 76f that is at an angle to the horizontal plane.

[0052] In the examples shown in Figures 5 and 6, the first connecting portion 76a is connected to the inner surface of the mounting wall body 75 that faces the housing 11 (the side opposite to the one-sided SB1 in the second direction DB). That is, the inner surface of the mounting wall body 75 that faces the housing 11 is the surface 76d to which the first connecting portion 76a is connected. In the examples shown in Figures 5 and 6, surface 76d is parallel to the mounting surface 73. The first connecting portion 76a has a plate-like shape with a surface parallel to the mounting surface 73. In the examples shown in Figures 5 and 6, the first connecting portion 76a is connected to the surface of the mounting wall body 75 by a first screw 121 that penetrates both the mounting wall body 75 and the first connecting portion 76a.

[0053] In the examples shown in Figures 5 and 6, the second connecting portion 76b is connected to the outer surface of the housing 11 (one side SB1 in the second direction DB) of the mounting wall frame portion 12k. That is, the outer surface of the housing 11 of the mounting wall body 75 is the surface 76e to which the second connecting portion 76b is connected. In this embodiment, one of the pair of connecting members 76 is connected to the surface of the first mounting wall side end frame portion 12b1. The other of the pair of connecting members 76 is connected to the surface of the second mounting wall side end frame portion 12b2. In the examples shown in Figures 5 and 6, the surface 76e is a surface parallel to the mounting surface 73. The second connecting portion 76b has a plate-like shape with a surface parallel to the mounting surface 73. In the examples shown in Figures 5 and 6, the second connecting portion 76b is connected to the surface of the mounting wall frame portion 12k by a second screw 122 that penetrates both the mounting wall frame portion 12k and the second connecting portion 76b.

[0054] In the examples shown in Figures 5 and 6, the connecting portion 76c has a plate-like shape perpendicular to the mounting surface 73 and perpendicular to the horizontal plane. Therefore, both surfaces of the connecting portion 76c in the third direction DC are perpendicular to the mounting surface 73 and perpendicular to the horizontal plane. As a result, both surfaces of the connecting portion 76c in the third direction DC are surfaces 76f that form an angle with surfaces 76d, 76e and the horizontal plane. In the examples shown in Figures 5 and 6, surface 76f is perpendicular to surfaces 76d, 76e and the horizontal plane.

[0055] Because the first connecting portion 76a, the second connecting portion 76b, and the connecting portion 76c have the above-described configuration, the bend 76g of the connecting member 76 that forms the boundary between the first connecting portion 76a and the connecting portion 76c extends in the vertical direction (first direction DA). Also, the bend 76h of the connecting member 76 that forms the boundary between the second connecting portion 76b and the connecting portion 76c extends in the vertical direction (first direction DA).

[0056] In the examples shown in Figures 5 and 6, each of the pair of connecting members 76 further has a positioning portion 76i. In the examples shown in Figures 5 and 6, the first connecting portion 76a, the second connecting portion 76b, the connecting portion 76c, and the positioning portion 76i are formed as a single unit. More specifically, a single flat metal material is bent to form a connecting member 76 having the first connecting portion 76a, the second connecting portion 76b, the connecting portion 76c, and the positioning portion 76i. In the examples shown in Figures 5 and 6, the positioning portion 76i is connected to the first connecting portion 76a. In particular, the positioning portion 76i is connected to the end of the first connecting portion 76a opposite to the side where the bend 76g that forms the boundary between the first connecting portion 76a and the connecting portion 76c is located. The boundary between the first connecting portion 76a and the positioning portion 76i is formed by the bend 76j of the connecting member 76, which is made of a flat metal material.

[0057] In the example shown in Figure 5, the positioning portion 76i is a linear protrusion that projects inward from the housing 11 and extends in the vertical direction (first direction DA). The positioning portion 76i determines the position of components such as the control module 14 and the energy storage element module 20, which are housed in the housing 11 of the energy storage element unit 10. That is, the positioning portion 76i contacts components such as the control module 14 and the energy storage element module 20 to prevent them from moving inside the housing 11. In the example shown in Figure 5, the shape of the linear protrusion of the positioning portion 76i is formed by bending a part of the connecting member 76, which is made of a flat metal material.

[0058] Next, the upper end support member 78 will be described. In the example shown in Figures 5 and 7, the mounting wall portion 13a is attached to the mounting wall portion body 75 and further has an upper end support member 78 that overlaps the mounting wall portion frame portion 12k from the inside of the housing 11 (opposite side to the one side SB1 in the second direction DB) and overlaps the upper end 75a of the mounting wall portion body 75.

[0059] In the examples shown in Figures 5 and 7, the upper end support member 78 is formed by bending a flat metal material. In the examples shown in Figures 5 and 7, the upper end support member 78 has a mounting portion 78a that is attached to the mounting wall body 75, an overlapping portion 78b that overlaps the mounting wall frame portion 12k, and an upper end support member connecting portion 78c that connects the mounting portion 78a and the overlapping portion 78b. The boundary between the mounting portion 78a and the upper end support member connecting portion 78c, and the boundary between the overlapping portion 78b and the upper end support member connecting portion 78c are formed by bending a flat metal material.

[0060] The upper end support member 78 is attached to the mounting wall body 75 at the mounting portion 78a. The mounting portion 78a is attached to the mounting wall body 75 by, for example, screw fastening. In the example shown in Figure 7, the mounting portion 78a is screwed to the mounting wall body 75 by a third screw 781 that penetrates both the mounting portion 78a and the mounting wall body 75.

[0061] In the example shown in Figure 7, the upper end support member 78 overlaps the mounting wall frame portion 12k from the inside of the housing 11 at the overlapping portion 78b. The overlapping portion 78b overlaps the mounting wall frame portion 12k from the inside of the housing 11 in the thickness direction (second direction DB) of the mounting wall portion 13a. In particular, the overlapping portion 78b is in contact with the mounting wall frame portion 12k from the inside of the housing 11. In the example shown in Figure 7, the overlapping portion 78b overlaps the portion of the first frame portion 12a that forms the mounting wall frame portion 12k from the inside of the housing 11.

[0062] Furthermore, in the example shown in Figure 7, the upper end support member 78 overlaps the upper end 75a of the mounting wall body 75 at the overlapping portion 78b. In particular, the overlapping portion 78b overlaps the upper end 75a of the mounting wall body 75 from the inside of the housing 11 in the thickness direction (second direction DB) of the mounting wall 13a.

[0063] In the examples shown in Figures 1 and 8, a baseboard 83 is attached to the wall 81, extending along the connection point between the wall 81 and the floor 82. In this case, the housing 11 is designed so that the mounting surface 73 can contact the wall 81 without being obstructed by the baseboard 83.

[0064] As an example, the distance w3 between the mounting surface 73 and the bottom surface 11d of the housing 11 in the vertical direction (first direction DA) is 50 mm or more. Since the height of the baseboard 83 (dimension in the first direction DA) is generally less than 50 mm, setting the distance w3 to 50 mm or more can prevent the mounting surface 73 from coming into contact with the baseboard 83. This prevents the mounting surface 73 from being prevented from coming into contact with the wall 81 by the baseboard 83.

[0065] Furthermore, the mounting surface 73 is located at least 10 mm below the mounting surface 73 in the vertical direction (first direction DA) of the mounting wall frame 12k, and outside the housing 11 in the thickness direction (second direction DB) of the mounting wall 13a. That is, the distance w5 shown in Figure 8 is 10 mm or more. In particular, in the example shown in Figure 8, the mounting surface 73 is located at least 10 mm below the mounting surface 73 in the vertical direction (first direction DA) of the housing 11, and outside the housing 11 in the thickness direction (second direction DB) of the mounting wall 13a. That is, the distance w6 shown in Figure 8 is 10 mm or more. This prevents the portion of the housing 11 located below the mounting surface 73, especially the portion of the mounting wall frame 12k located below the mounting surface 73, from coming into contact with the baseboard 83. This prevents the portion of the housing 11 located below the mounting surface 73 from coming into contact with the baseboard 83, thus preventing the mounting surface 73 from being prevented from coming into contact with the wall 81.

[0066] The material of the mounting wall portion 13a is, for example, metal. The mounting wall portion 13a is made of the same material as the metal plate 92 of the upper wall portion 13b and side wall portion 13c, which will be described later. In this embodiment, the mounting wall portion 13a has a mounting wall portion body 75, a connecting member 76, and an upper end support member 78. In this case, the materials of the mounting wall portion body 75, the connecting member 76, and the upper end support member 78 may be metal, in particular a metal similar to the material of the metal plate 92.

[0067] Next, the wall portions 13 other than the mounting wall portion 13a will be described in more detail. The housing 11 of this embodiment includes an upper wall portion 13b and three side wall portions 13c as wall portions 13 other than the mounting wall portion 13a. In this embodiment, each of the wall portions 13 other than the mounting wall portion 13a is composed of a laminate made of a resin plate 91 and a metal plate 92 located inside the housing 11 from the resin plate 91, as shown in Figures 1 and 4. The resin plate 91 and the metal plate 92 each have a substantially plate-like shape.

[0068] In the example shown in Figure 1, the housing 11 further includes a decorative panel 19 that covers one side wall portion 13c. The decorative panel 19 is a member that protects the one side wall portion 13c and the components provided on the one side wall portion 13c. In the example shown in Figure 1, the decorative panel 19 has a substantially plate-like shape. The decorative panel 19 can be made of a resin material similar to the material of the resin plate 91, for example.

[0069] Next, the energy storage element unit 10 comprising the housing 11 will be described. As described above, the energy storage element unit 10 of this embodiment comprises a housing 11, an energy storage element module 20 housed in the housing 11, a control module 14 housed in the housing 11, and a plurality of screws 72.

[0070] The control module 14 will now be described. In the example shown in Figure 2, the control module 14 is housed inside the housing 11. The control module 14 is stacked on top of the energy storage element module 20 in the vertical direction (first direction DA). The control module 14 is electrically connected to the energy storage element module 20 housed inside the housing 11. Although not shown in the figures, the control module 14 may also be electrically connected to each of the multiple energy storage element modules 20 via multiple module wirings.

[0071] The control module 14 has, for example, one or more functions: a function to control the charging and discharging of the multiple energy storage element modules 20; a function to monitor the charging state (e.g., charge amount) of the energy storage element modules 20; and a function to monitor whether or not there is an abnormality in the energy storage element modules 20. The control module 14 may also transmit information such as the charging state and abnormality monitoring results of the energy storage element modules 20 to a control device installed outside the energy storage element unit 10. The control module 14 may also have a switch to switch between the electrical connection and disconnection between the external wiring (e.g., building wiring) of the energy storage element unit 10 and the energy storage element modules 20.

[0072] Next, the energy storage element module 20 will be described. In the example shown in Figure 2, the energy storage element module 20 housed inside the housing 11 is observed. Multiple energy storage element modules 20 may be housed inside the housing 11. In the illustrated example, the energy storage element modules 20 are stacked vertically (first direction DA) inside the housing 11. Of the multiple energy storage element modules 20 stacked vertically, the energy storage element module 20 located at the lowest point (one side SA1) in the vertical direction is in contact with the second metal plate body portion 12h of the third frame portion 12c. That is, the multiple energy storage element modules 20 are supported from below in the vertical direction by the third frame portion 12c.

[0073] The energy storage element module 20 has the function of housing multiple cells (not shown). A cell is the smallest unit treated as an energy storage element. Various types of cells can be used. A cell may be, for example, a lithium-ion secondary battery.

[0074] Although not shown in the diagram, the energy storage element module 20 may include module wiring. In this case, the module wiring is housed inside the enclosure. The module wiring of the energy storage element module 20 is connected to the control module 14. The module wiring is electrically connected to the device to which the energy storage element module 20 supplies electricity via the control module 14.

[0075] Next, the multiple screws 72 will be described. The multiple screws 72 are fastened to the wall 81 by passing through all or selected portions of the multiple through holes 71 from the inside of the housing 11. In the example shown in Figure 5, the number of multiple screws 72 is equal to the number of multiple through holes 71 provided in the mounting surface 73. In this case, the multiple screws 72 are fastened to the wall 81 by passing through all of the multiple through holes 71 from the inside of the housing 11. In the example shown in Figure 5, both the number of multiple screws 72 and the number of multiple through holes 71 are 16.

[0076] For example, screw 72 is a wood screw. The type of screw 72 can be appropriately selected depending on the material of the wall 81 to which the housing 11 is attached. In particular, if the material of the wall 81 is wood, a wood screw can be used as screw 72. A "wood screw" refers to a screw that can be inserted into a material, such as wood, and fastened even if the material to be screwed does not have a female thread, by contacting the tip with the material and rotating it. If the material of the wall 81 is concrete, screw 72 may be a concrete screw.

[0077] As an example, the screw 72 has a head 72a shown in Figure 5 and a shaft portion (not shown) extending from the head 72a. Although not shown, at least a portion of the shaft portion is provided with helical threads. The diameter of the shaft portion of the screw 72 (the width of the shaft portion in a direction perpendicular to the direction in which the shaft portion extends) is less than or equal to the width of the through hole 71 through which the screw 72 passes. Also, the diameter of the head 72a of the screw 72 (the width of the head 72a in a direction perpendicular to the direction in which the shaft portion extends) is greater than the width of the through hole 71. As a result, the housing 11 can be attached to the wall 81 by passing the shaft portion of the screw 72 through the through hole 71 and screwing it to the wall 81, and by sandwiching the mounting wall portion 13a between the head 72a of the screw 72 and the wall 81.

[0078] Next, the manufacturing method of the energy storage element unit 10 attached to the wall 81 of the building 80, as described above, will be explained. The manufacturing method of the energy storage element unit 10 corresponds to the method of attaching the energy storage element unit 10 to the wall 81 of the building 80. Furthermore, the manufacturing method of the energy storage element unit 10 also corresponds to the manufacturing method of the building 80, which comprises the energy storage element unit 10 attached to the wall 81 and the wall 81.

[0079] The manufacturing method for the energy storage element unit 10 of this embodiment includes a screw fastening step of fastening a plurality of screws 72 to the wall 81 by passing them through all or a portion of a plurality of through holes 71 from the inside of the housing 11. The manufacturing method for the energy storage element unit 10 of this embodiment further includes a body placement step of positioning the mounting wall body 75 on the mounting wall frame 12k, and an upper end support member attachment step of attaching the upper end support member 78 to the mounting wall body 75 after the body placement step. The manufacturing method for the energy storage element unit 10 of this embodiment further includes a first connection step of connecting the first connection portion 76a of each of a pair of connecting members 76 to the mounting wall body 75, and a second connection step of connecting the second connection portion 76b of each of a pair of connecting members 76 to the mounting wall frame 12k.

[0080] In the manufacturing method of the energy storage element unit 10 of this embodiment, first, a pair of connecting members 76 are attached to the mounting wall body 75. The attachment of the pair of connecting members 76 to the mounting wall body 75 can be performed by performing a first connection step in which each of the first connecting portions 76a of the pair of connecting members 76 is connected to the mounting wall body 75. In the first connection step, first, the pair of connecting members 76 are positioned relative to the mounting wall body 75 so that each of the first connecting portions 76a of the pair of connecting members 76 is in contact with the surface 76d of the mounting wall body 75. Then, as shown in Figure 6, the first screw 121 is screwed in. This allows each of the first connecting portions 76a of the pair of connecting members 76 to be connected to the mounting wall body 75.

[0081] After the first connection step, the mounting wall body 75 is attached to the mounting wall frame 12k of the frame 12 shown in Figure 3. The mounting wall body 75 to the mounting wall frame 12k can be done by performing the body placement step and the second connection step.

[0082] In the main body placement process, the mounting wall body 75 is positioned relative to the mounting wall frame 12k such that its lower end 75b overlaps the mounting wall frame 12k from the inside of the housing. Also, the mounting wall body 75 is positioned relative to the mounting wall frame 12k such that its upper end 75a overlaps the mounting wall frame 12k from the outside of the housing 11. In the main body placement process, first, the mounting wall body 75 with the pair of connecting members 76 attached is brought close to the mounting wall frame 12k from the outside of the housing 11 (one side SB1 in the second direction DB). Then, the lower end 75b of the mounting wall body 75 is passed between the first mounting wall side end frame 12b1 and the second mounting wall side end frame 12b2 and overlapped with the mounting wall frame 12k from the inside of the housing. As described above, the dimension w4 of the lower end 75b of the mounting wall body 75 is less than or equal to the distance w7 between the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2, so that the lower end 75b of the mounting wall body 75 can pass between the first mounting wall side end frame portion 12b1 and the second mounting wall side end frame portion 12b2. By positioning the mounting wall body 75 with the pair of connecting members 76 attached to the mounting wall frame portion 12k in the manner described above, the mounting wall body 75 can be positioned relative to the mounting wall frame portion 12k such that the lower end 75b of the mounting wall body 75 overlaps the mounting wall frame portion 12k from the inside of the housing. In addition, the mounting wall body 75 can be positioned relative to the mounting wall frame portion 12k such that the upper end 75a of the mounting wall body 75 overlaps the mounting wall frame portion 12k from the outside of the housing 11. Furthermore, the pair of connecting members 76 attached to the mounting wall body 75 can be positioned relative to the mounting wall frame 12k such that the second connecting portion 76b of each of the pair of connecting members 76 contacts the surface 76e of the mounting wall frame 12k.

[0083] Furthermore, in the main body placement process, the mounting wall body 75 is positioned relative to the mounting wall frame 12k such that the projections 75d of the mounting wall body 75 are inserted into the openings 12n of the mounting wall frame 12k. In particular, the mounting wall body 75 is positioned relative to the mounting wall frame 12k such that each of the three projections 75d located near the first side end 75c1 is inserted into each of the three openings 12n provided in the first mounting wall side end frame 12b1. Also, the mounting wall body 75 is positioned relative to the mounting wall frame 12k such that each of the three projections 75d located near the second side end 75c2 is inserted into each of the three openings 12n provided in the second mounting wall side end frame 12b2.

[0084] After the main body placement process, a second connection process is performed. In the second connection process, with the second connection portions 76b of each of the pair of connecting members 76 in contact with the surface 76e of the mounting wall frame portion 12k, the second screw 122 is screwed in as shown in Figure 6. This allows each of the second connection portions 76b of the pair of connecting members 76 to be connected to the mounting wall frame portion 12k. Furthermore, the mounting wall main body 75 and the mounting wall frame portion 12k can be connected by the connecting members 76.

[0085] Furthermore, the upper end support member attachment process is performed after the main body placement process. The upper end support member attachment process can be performed before or after the second connection process, or in parallel with the second connection process. In the upper end support member attachment process, first, the upper end support member 78 is positioned to be attachable to the mounting wall body 75. In this embodiment, the upper end support member 78 is positioned so as to overlap the mounting wall frame portion 12k from the inside of the housing 11 and overlap the upper end 75a of the mounting wall body 75. After positioning the upper end support member 78 with respect to the mounting wall body 75, the upper end support member 78 is attached to the mounting wall body 75. With the attachment portion 78a of the upper end support member 78 in contact with the mounting wall body 75, the upper end support member 78 can be attached to the mounting wall body 75 by screwing in the third screw 781 as shown in Figure 7.

[0086] Furthermore, three side wall sections 13c are attached to the frame section 12. The three side wall sections 13c are attached to the frame section 12, for example, by screw fastening. As a result, a housing 11 is formed in which only the upper wall section 13b is removed, and an opening is formed on the upper side.

[0087] Next, the housing 11, with only the upper wall portion 13b removed and an opening formed on the upper side, is placed in the building 80 at the mounting position for the housing 11. That is, the housing 11 is placed on the floor 82 of the building 80 such that the mounting surface 73 and the contact surface 74 are in contact with the wall 81 of the building 80.

[0088] Next, a screw fastening process is performed in which multiple screws 72 are passed through all or selected portions of the multiple through holes 71 from the inside of the housing 11 and screwed to the wall 81. In this embodiment, multiple screws 72 are passed through all of the multiple through holes 71 from the inside of the housing 11 and screwed to the wall 81. The screw fastening work can be performed through an opening formed on the upper side of the housing 11. For example, if wood screws are used as screws 72, the screws 72 can be inserted into the through holes 71 and then rotated using an electric screwdriver or the like to screw the screws 72 to the wall 81.

[0089] Next, the multiple energy storage element modules 20 and the control module 14 are housed in the housing 11 through an opening formed on the upper side of the housing 11. Then, the upper wall portion 13b is attached to close the opening. This allows for the manufacture of an energy storage element unit 10 that is mounted on the wall 81 of the building 80.

[0090] According to this embodiment, in the housing 11 that houses the energy storage element module 20 and is attached to the wall 81 of the building 80, the mounting wall body 75 of the mounting wall portion 13a facing the wall 81 is provided with a plurality of through holes 71 and has a mounting surface 73 that contacts the wall 81. As a result, the housing 11 and the energy storage element unit 10, which houses the energy storage element module 20 in the housing 11, can be attached to the wall 81 by passing screws 72 through the through holes 71 and screwing them to the wall 81.

[0091] Furthermore, a pair of connecting members 76 connected to the mounting wall body 75 and the mounting wall frame 12k have a first connecting portion 76a connected to the mounting wall body 75, a second connecting portion 76b connected to the mounting wall frame 12k, and a connecting portion 76c connecting the first connecting portion 76a and the second connecting portion 76b. The connecting portion 76c has a surface 76d to which the first connecting portion 76a of the mounting wall body 75 is connected, a surface 76e to which the second connecting portion 76b of the mounting wall frame 12k is connected, and a surface 76f that forms an angle with respect to the horizontal plane. This provides the following effect: When the wall 81 of the building 80 vibrates due to an earthquake or the like, the connecting portion 76c flexes, allowing relative movement of the mounting wall frame 12k with respect to the mounting wall body 75 attached to the wall 81. Therefore, vibrations transmitted from the wall 81 to the mounting wall frame 12k can be reduced by the connecting portion 76c. This allows the housing 11 of the energy storage element unit 10 to be attached to the wall 81 of the building 80 in a manner that provides resistance to vibration.

[0092] Here, "having resistance to vibration" means, for example, that even if the building 80 on which the energy storage element unit 10 is installed vibrates, the energy storage element unit 10 will not tip over. Alternatively, "having resistance" may also mean that even if the building 80 vibrates, the energy storage element unit 10 will not tip over and will be able to operate normally as an energy storage element unit 10. Alternatively, "having resistance" may also mean that even if the building 80 vibrates, the energy storage element unit 10 will not tip over, will be able to operate normally as an energy storage element unit 10, and the appearance of the energy storage element unit 10 will not be damaged. Alternatively, "having resistance" may also mean that even if the building 80 vibrates, the internal components of the energy storage element unit 10 will not be damaged.

[0093] In particular, in this embodiment, the pair of connecting members 76 sandwich the portion of the mounting wall body 75 that forms the mounting surface 73 in the horizontal direction. Furthermore, the surface 76f of the connecting portion 76c is perpendicular to the mounting surface 73 and perpendicular to the horizontal plane. With such a pair of connecting members 76, horizontal vibrations transmitted from the wall 81 to the mounting wall frame portion 12k can be effectively reduced by the connecting portion 76c.

[0094] In particular, the inventors of this invention conducted extensive research on the housing 11 for the energy storage element unit 10 mounted on the wall 81 and found that the housing 11 mounted on the wall 81 is more prone to vibration in the horizontal direction than in the vertical direction. Specifically, it was found that the housing 11 mounted on the wall 81 is prone to vibration in the horizontal direction, as if sliding on the floor 82. As described above, by reducing the horizontal vibration, the resistance of the housing 11 and the energy storage element unit 10 to horizontal vibration can be improved.

[0095] Furthermore, according to this embodiment, the mounting wall body 75 has a projection 75d that protrudes toward the inside of the housing 11, and the mounting wall frame 12k is provided with an opening 12n into which the projection 75d is inserted. This provides the following effects: By inserting the projection 75d of the mounting wall body 75 into the opening 12n provided in the mounting wall frame 12k, the mounting wall body 75 is less likely to come off the mounting wall frame 12k. Also, when the projection 75d of the mounting wall body 75 is inserted into the opening 12n provided in the mounting wall frame 12k, relative movement of the mounting wall frame 12k with respect to the mounting wall body 75 is more easily tolerated than, for example, when the mounting wall body 75 is screwed to the mounting wall frame 12k. For this reason, when the wall 81 of the building 80 vibrates due to an earthquake or the like, relative movement of the mounting wall frame 12k with respect to the mounting wall body 75 attached to the wall 81 can be tolerated.

[0096] In particular, according to this embodiment, the width w9 of the projection 75d in a direction parallel to the mounting surface 73 and parallel to the horizontal plane is smaller than the width w10 of the opening 12n into which the projection 75d is inserted, in a direction parallel to the mounting surface 73 and parallel to the horizontal plane. This makes it possible to stably tolerate horizontal vibrations transmitted from the wall 81 to the mounting wall frame 12k while inserting the projection 75d into the opening 12n.

[0097] Furthermore, according to this embodiment, the mounting wall portion 13a is attached to the mounting wall portion body 75 and further has an upper end support member 78 that overlaps the mounting wall portion frame portion 12k from the inside of the housing 11 and overlaps the upper end 75a of the mounting wall portion body 75. Therefore, when an earthquake occurs and the housing 11 vibrates, the upper end support member 78 is supported by the mounting wall portion frame portion 12k. This suppresses the overall deformation of the mounting wall portion 13a. In particular, in this embodiment, the upper end 75a of the mounting wall portion body 75 overlaps the mounting wall portion frame portion 12k from the outside of the housing 11. In this case as well, the upper end support member 78 overlaps the mounting wall portion frame portion 12k from the inside of the housing 11, thereby suppressing the overall deformation of the mounting wall portion 13a.

[0098] In particular, in this embodiment, the upper end support member 78 is in contact with the mounting wall frame portion 12k from the inside of the housing 11. Also, the upper end 75a of the mounting wall body 75 is in contact with the mounting wall frame portion 12k from the outside of the housing 11. Therefore, as shown in Figure 7, the mounting wall frame portion 12k is sandwiched between the upper end 75a of the mounting wall body 75 and the upper end support member 78. This allows the upper end of the mounting wall portion 13a to be more firmly supported by the mounting wall frame portion 12k, and the deformation of the mounting wall portion 13a can be more stably suppressed.

[0099] Furthermore, according to this embodiment, the lower end 75b of the mounting wall body 75 overlaps the mounting wall frame 12k from the inside of the housing 11. In particular, according to this embodiment, the lower end 75b of the mounting wall body 75 is in contact with the mounting wall frame 12k from the inside of the housing 11. This allows the lower end 75b of the mounting wall body 75 to be supported by the mounting wall frame 12k when the housing 11 vibrates due to an earthquake. Therefore, deformation of the lower end 75b of the mounting wall body 75 can be suppressed by the mounting wall frame 12k.

[0100] Furthermore, according to this embodiment, the mounting wall body 75 further has a linear recess 77 that is recessed toward the inside of the housing 11 and extends horizontally. The presence of the horizontally extending linear recess 77 in the mounting wall body 75 makes it less likely for the mounting wall body 75 to deform in a way that causes it to bend around an axis extending in the vertical direction. As a result, the mounting wall body 75 is less likely to deform due to horizontal vibrations of the housing 11.

[0101] In particular, the horizontal dimension w1 of the linear recess 77 is 0.5 times or more the horizontal dimension w2 of the mounting wall portion 13a, so that the linear recess 77 is formed over a wide area of ​​the mounting wall portion 13a in the horizontal direction. As a result, the deformation of the mounting wall portion 13a over a wide area of ​​the horizontal direction can be effectively suppressed by the action of the linear recess 77.

[0102] Furthermore, according to this embodiment, the distance w3 between the mounting surface 73 and the bottom surface 11d of the housing 11 in the vertical direction is 50 mm or more. This prevents the mounting surface 73 from coming into contact with a baseboard 83 of a typical size. Therefore, it is possible to prevent the mounting surface 73 from being prevented from coming into contact with the wall 81 by contacting the baseboard 83.

[0103] Furthermore, according to this embodiment, the mounting surface 73 is located at least 10 mm below the mounting surface 73 in the vertical direction of the mounting wall frame 12k, and is located outside the housing 11 in the thickness direction of the mounting wall 13a. This prevents the portion of the mounting wall frame 12k located below the mounting surface 73 from coming into contact with the baseboard 83. Therefore, it is possible to prevent the portion of the mounting wall frame 12k located below the mounting surface 73 from coming into contact with the baseboard 83, thereby preventing the mounting surface 73 from being prevented from coming into contact with the wall 81.

[0104] Furthermore, the manufacturing method of the energy storage element unit 10 of this embodiment includes a screw fastening step in which a plurality of screws 72 are passed through all or selected portions of a plurality of through holes 71 from the inside of the housing 11 and screwed to the wall 81. This makes it possible to manufacture an energy storage element unit 10 that is attached to the wall 81 of a building 80.

[0105] Furthermore, the manufacturing method of the energy storage element unit 10 of this embodiment allows for the production of an energy storage element unit 10 mounted on the wall 81 of a building 80 by the following method. First, a housing 11 is manufactured by performing multiple steps, including the first connection step, main body placement step, second connection step, and upper end support member mounting step described above, with only the upper wall portion 13b removed and an opening formed on the upper side. Next, the housing 11 is placed on the floor 82 of the building 80 so that the mounting surface 73 is in contact with the wall 81 of the building 80. Next, the screw fastening step described above is performed through the opening formed on the upper side of the housing 11. Next, the multiple energy storage element modules 20 and control module 14 are housed in the housing 11 through the opening formed on the upper side of the housing 11. Finally, the upper wall portion 13b is attached to close the opening. This method allows the manufacturing of the enclosure 11 with an opening formed on the top to be carried out outside the building 80, and the subsequent work of placing the enclosure 11 on the floor 82 of the building 80 can be carried out by bringing the enclosure 11 with the opening formed on the top into the building 80. This makes it possible to carry out the manufacturing of the enclosure 11 with the opening formed on the top in advance, which makes the work at the site, i.e., inside the building 80, easier. It also reduces the time spent working at the site.

[0106] The embodiments of the present invention are not limited to those described above, but include various modifications that a person skilled in the art could conceive, and the effects of the present invention are not limited to those described above. In other words, various additions, modifications, and partial deletions are possible as long as they do not depart from the conceptual idea and spirit of the present invention derived from the claims and their equivalents. [Explanation of symbols]

[0107] 10 Energy Storage Element Unit 11 cabinets 12 Frame section 12k Mounting wall frame 12n aperture 13 Wall 13a Mounting wall section 13b Upper wall part 13c Side wall part 14 Control Module 20 Energy Storage Element Modules 71 Through hole 72 screws 73 Mounting surface 75 Mounting wall unit 75a top end 75b bottom end 75d protrusion 76 Connecting Member 76a First connection section 76b Second connection section 76c connection part 78 Upper end support member 80 buildings 81 Wall 82 beds 83 Baseboard

Claims

1. A housing that contains an energy storage element module and is fixed to the wall of a building, Mounting wall portion facing the aforementioned wall, The frame comprises a frame having a mounting wall frame to which the aforementioned mounting wall is attached, The mounting wall portion comprises a mounting wall portion body having a plurality of through holes and a mounting surface in contact with the wall, and a pair of connecting members connected to the mounting wall portion body and the mounting wall portion frame. Each of the pair of connecting members has a first connecting portion connected to the mounting wall body, a second connecting portion connected to the mounting wall frame, and a connecting portion that connects the first connecting portion and the second connecting portion. The connecting portion is a housing having a surface to which the first connecting portion of the mounting wall body is connected, a surface to which the second connecting portion of the mounting wall frame is connected, and a surface that forms an angle with respect to the horizontal plane.

2. The mounting wall body has a projection that protrudes toward the inside of the housing, The housing according to claim 1, wherein the mounting wall frame portion is provided with an opening into which the projection portion is inserted.

3. The upper end of the mounting wall body overlaps the mounting wall frame from the outside of the housing, The housing according to claim 1, wherein the mounting wall portion further includes an upper end support member that is attached to the mounting wall portion body, overlaps the mounting wall portion frame portion from the inside of the housing, and overlaps the upper end of the mounting wall portion body.

4. The housing according to claim 1, wherein the distance between the mounting surface and the bottom surface of the housing in the vertical direction is 50 mm or more.

5. The housing according to claim 1, wherein the mounting surface is located at least 10 mm below the mounting surface in the vertical direction of the mounting wall frame, and is located outside the housing in the thickness direction of the mounting wall.

6. A housing according to any one of claims 1 to 5, The energy storage element module housed in the aforementioned enclosure, A storage element unit comprising: a plurality of screws that pass through all or selected portions of the plurality of through holes from the inside of the housing and are screwed to the wall.

7. The energy storage element unit according to claim 6, A building comprising the aforementioned wall.

8. A method for manufacturing an energy storage element unit attached to the wall of a building, The energy storage element unit comprises a housing, an energy storage element module housed in the housing, and a plurality of screws. The housing has a mounting wall portion facing the wall and a frame portion having a mounting wall portion frame portion to which the mounting wall portion is attached. The mounting wall portion comprises a mounting wall portion body having a plurality of through holes and a mounting surface in contact with the wall, and a pair of connecting members connected to the mounting wall portion body and the mounting wall portion frame. Each of the pair of connecting members has a first connecting portion connected to the mounting wall body, a second connecting portion connected to the mounting wall frame, and a connecting portion that connects the first connecting portion and the second connecting portion. The connecting portion has a surface to which the first connecting portion of the mounting wall body is connected, a surface to which the second connecting portion of the mounting wall frame is connected, and a surface that forms an angle with respect to the horizontal plane. A method for manufacturing an energy storage element unit, comprising a screw fastening step of fastening the plurality of screws to the wall of the housing by passing them through each of the plurality of through holes, or a portion selected from the plurality of through holes, from the inside of the housing.

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