Power storage element unit, building and installation method

Abstract

To install a power storage element unit in such a way that it is resistant to vibration.SOLUTION: A power storage element unit is a power storage element unit to be installed on the floor of a building, and has a housing having a bottom wall section with a plurality of through holes, a plurality of power storage element modules stored in the housing, and a plurality of wood screws screwed to the floor through all or each of a portion selected from the plurality of through holes from above.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present disclosure relates to an energy storage element unit, a building, and an installation method.

Background Art

[0002] For example, as disclosed in Patent Document 1, an energy storage element unit having a plurality of energy storage element modules is known. The energy storage element unit includes a storage box that houses the plurality of energy storage element modules together with the plurality of energy 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 energy 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 install the energy storage element unit so as to have resistance to vibration.

Means for Solving the Problems

[0006] The energy storage element unit according to the present disclosure is an energy storage element unit installed on the floor of a building, a storage box having a bottom wall portion provided with a plurality of through holes, a plurality of energy storage element modules housed in the storage box, and a plurality of wood screws that penetrate each of all of the plurality of through holes or a part selected from the plurality of through holes from above and are screwed to the floor.

[0007] In the energy storage element unit according to the present disclosure, The wooden screws may be screwed to the floor by penetrating each of some selected from the plurality of through holes from above.

[0008] In the energy storage element unit according to the present disclosure, When the assumed vibration of the energy storage element unit is 1530 Gal or less, the energy storage element unit includes 12 or more of the wooden screws, When the assumed vibration of the energy storage element unit is greater than 1530 Gal and 2600 Gal or less, the energy storage element unit includes 16 or more of the wooden screws, When the assumed vibration of the energy storage element unit is greater than 2600 Gal and 3931 Gal or less, the energy storage element unit may include 21 or more of the wooden screws.

[0009] In the energy storage element unit according to the present disclosure, The storage box has a side wall portion that is connected to the edge portion of the bottom wall portion at the edge portion and is perpendicular to the bottom wall portion, Each of the plurality of through holes may be separated from the side wall portion by 1 cm or more.

[0010] In the energy storage element unit according to the present disclosure, The bottom wall portion may have an indicating portion that indicates a through hole through which the wooden screw is to penetrate among the plurality of through holes according to the magnitude of the assumed vibration of the energy storage element unit.

[0011] The building according to the present disclosure, A floor having a floorboard and a gypsum board stacked on the floorboard, An energy storage element unit installed on the floor, the energy storage element unit having a storage box having a bottom wall portion provided with a plurality of through holes, a plurality of energy storage element modules stored in the storage box, and a plurality of wooden screws that penetrate all of the plurality of through holes or each of some selected from the plurality of through holes from above and are screwed to the floor.

[0012] The installation method according to the present disclosure, An installation method for installing an energy storage element unit on the floor of a building, The energy storage element unit includes a storage box having a bottom wall portion provided with a plurality of through holes, a plurality of energy storage element modules stored in the storage box, and a plurality of wood screws. The method includes a screwing step of screwing the wood screws from above through all or a part of the plurality of through holes selected from the plurality of through holes and screwing them to the floor.

[0013] In the installation method according to the present disclosure, In the screwing step, the through holes through which the wood screws penetrate may be selected from the plurality of through holes according to the assumed vibration of the energy storage element unit.

Advantages of the Invention

[0014] According to the present disclosure, the energy storage element unit can be installed so as to have resistance to vibration.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

MODE FOR CARRYING OUT THE INVENTION

[0016] Hereinafter, with reference to FIGS. 1 to 12, an example of an embodiment of a power storage element unit according to the present disclosure will be described in detail.

[0017] Hereinafter, an embodiment of the present disclosure will be described with reference to the specific examples shown in the drawings. In the drawings attached to this specification, for the convenience of illustration and easy understanding, the scale, the aspect ratio of the vertical and horizontal dimensions, etc. are appropriately changed and exaggerated from those of the actual object.

[0018] FIGS. 1 to 12 are diagrams for explaining an embodiment according to the present disclosure. Among these, FIG. 1 is a perspective view showing the power storage element unit 10, and FIG. 2 is a perspective view showing the inside of the power storage element unit 10. In FIG. 2, illustrations of two of the upper wall portion 13b and the side wall portion 13c (the ones located on the front side in FIG. 2) to be described later are omitted.

[0019] In order to clarify the directional relationships between the drawings, in some of the drawings, the first direction DA, the second direction DB, and the third direction DC are shown as common directions between the drawings by arrows. The tip side of the arrow becomes one side SA1, SB1, SC1 of each direction DA, DB, DC. Further, an arrow pointing toward the back of the drawing paper along the direction perpendicular to the drawing paper is shown by a symbol with an X inside a circle, as shown in FIG. 4, for example. Furthermore, in the drawings showing components (such as the rechargeable element module assembly 15 and the rechargeable element module 20) stored in the storage box 11, the direction and orientation in the state of being stored in the storage box 11 are shown. Similarly, in the drawings showing each component (such as the cell 30 and the case 18 described later) included in the rechargeable element module 20, the direction and orientation in the state of being incorporated into the rechargeable element module 20 stored in the storage box 11 are shown.

[0020] In the illustrated example, the first direction DA, the second direction DB, and the third direction DC are perpendicular to each other. Also, the first direction DA is 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, which is the side opposite to one side in the first direction DA, is the upper side in the vertical direction.

[0021] The rechargeable element unit 10 is used as a secondary battery unit capable of charging and discharging. The illustrated rechargeable element unit 10 is a rechargeable element unit 10 for indoor installation and is applied to buildings, particularly houses. The rechargeable element unit 10 is installed on the floor 80 of a building described later. The rechargeable element unit 10 is electrically connected to the wiring of the building and functions as a power source for electrical devices installed in the building.

[0022] As shown in FIGS. 1 and 2, the rechargeable element unit 10 includes a storage box 11, a control module 14 stored in the storage box 11, and a plurality of rechargeable element modules 20. Also, as will be described later, the rechargeable element unit 10 further includes a plurality of wood screws 72 for fixing the rechargeable element unit 10 on the floor 80 when the rechargeable element unit 10 is installed on the floor 80 of a building.

[0023] First, the storage box 11 will be described. The storage box 11 has a plurality of wall portions 13, and the wall portions 13 form an arrangement space for the control module 14 and the power storage element module 20. In the example shown in FIG. 2, the storage box 11 further has a frame portion 12 that connects adjacent wall portions 12 to each other. The wall portions 13 close the arrangement space for the control module 14 and the power storage element module 20.

[0024] In the example shown in FIG. 1, the storage box 11 has a substantially rectangular parallelepiped shape and, as the wall portions 13, has a bottom wall portion 13a, an upper wall portion 13b, and four side wall portions 13c. The bottom wall portion 13a is a substantially rectangular plate-shaped wall portion located on one side SA1 in the first direction DA. The upper wall portion 13b is a substantially rectangular plate-shaped wall portion facing the bottom wall portion 13a in the first direction DA. The bottom wall portion 13a and the upper wall portion 13b each have a pair of long sides 131 extending in the third direction DC and a pair of short sides 132 extending in the second direction DB orthogonal to the third direction DC. The side wall portion 13c is a wall portion connected to the edge portion of the bottom wall portion 13a at the edge portion. In the example shown in FIG. 1, the four side wall portions 13c are each substantially rectangular plate-shaped wall portions connected to the edge portion located on one side of the bottom wall portion 13a and the edge portion located on one side of the upper wall portion 13b at their edge portions. The side wall portion 13c is perpendicular to the bottom wall portion 13a. In the example shown in FIG. 1, the four side wall portions 13c are perpendicular to the bottom wall portion 13a and the upper wall portion 13b.

[0025] As shown in FIG. 2, the plurality of wall portions 13 may each be independent members. Also, although not shown, the bottom wall portion 13a and the four side wall portions 13c may be integrally formed. In this case, the storage box 11 may be opened and closed by attaching and detaching the upper wall portion 13b to and from the integral body of the bottom wall portion 13a and the four side wall portions 13c.

[0026] In the present embodiment, as an example, as shown in FIG. 2, a case where a plurality of wall portions 13 are each an independent member having a substantially plate-like shape as a whole will be described. In this case, the plurality of wall portions 13 are each connected to an edge portion of another adjacent wall portion 13 directly or via a frame portion 12 described later at an edge portion of the wall portion 13. By connecting the edge portions of the plurality of wall portions 13 to each other, a storage box 11 having a storage space for storing a plurality of power storage element modules 20 is formed.

[0027] FIG. 3 is a perspective view showing a state of the bottom wall portion 13a as viewed from the inside of the storage box 11 (the side opposite to one side SA1 in the first direction DA, that is, the upper side in FIG. 2). In the present embodiment, each of the wall portions 13 is composed of a laminate including a resin plate 91 and a metal plate 92 located inside the storage box 11 rather than the resin plate 91, like the bottom wall portion 13a shown in FIG. 3. The resin plate 91 and the metal plate 92 each have a substantially plate-like shape.

[0028] The frame portion 12 is a member having an L-shaped cross section that connects adjacent wall portions 13 to each other. In the example shown in FIG. 2, the frame portion 12 constitutes a side of the storage box 11 having a substantially rectangular parallelepiped shape. The frame portion 12 is composed of, for example, the same material as the material of the metal plate 92.

[0029] In the present embodiment, as shown in FIG. 2, the frame portion 12 connects the upper wall portion 13b and each of the four side wall portions 13c, and also connects adjacent ones of the four side wall portions 13c to each other. In the example shown in FIG. 2, the frame portion 12 has a rectangular frame-shaped first frame portion 12a extending between the upper wall portion 13b and the four side wall portions 13c, and four rod-shaped second frame portions 12b each extending between adjacent ones of the four 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 corner positions of the upper wall portion 13b.

[0030] In the example shown in FIG. 2, the frame portion 12 is not provided between each of the bottom wall portion 13a and the four side wall portions 13c. In the example shown in FIG. 2, as will be described later, the metal plate 92 of the bottom wall portion 13a has an edge portion 92b, and the bottom wall portion 13a and the four side wall portions 13c are fixed to each other by using the edge portion 92b of the metal plate 92 of the bottom wall portion 13a. That is, each of the four side wall portions 13c is fixed to the edge portion 92b of the metal plate 92 of the bottom wall portion 13a.

[0031] In the example shown in FIG. 1, the storage box 11 further has 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 FIG. 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.

[0032] The bottom wall portion 13a of the wall portion 13 will be described in more detail. The resin plate 91 of the bottom wall portion 13a has a flat plate-like resin plate main body portion 91a and a resin plate edge portion 91b provided around the resin plate main body portion 91a and forming an angle with the resin plate main body portion 91a. In the example shown in FIG. 3, the resin plate main body portion 91a and the resin plate edge portion 91b are orthogonal to each other.

[0033] The metal plate 92 of the bottom wall portion 13a has a flat plate-like main body portion 92a and an edge portion 92b provided around the main body portion 92a and forming an angle with the main body portion 92a. In the example shown in FIG. 3, the main body portion 92a and the edge portion 92b are orthogonal to each other.

[0034] Also, in the example shown in FIG. 3, the metal plate 92 of the bottom wall portion 13a has a connecting portion 92d that includes an upright portion 92e standing up from the main body portion 92a and includes a portion connected to the resin plate 91. In the example shown in FIG. 3, the metal plate 92 has a plurality of connecting portions 92d including flat plate-shaped upright portions 92e extending in the second direction DB and parallel to the first direction DA and the second direction DB. The upright portions 92e of the plurality of connecting portions 92d face each other in the third direction DC. In the example shown in FIG. 3, the metal plate 92 of the bottom wall portion 13a has four connecting portions 92d.

[0035] In the example shown in FIG. 3, the connecting portion 92d is connected to an end portion of the upright portion 92e on the side opposite to the side where the main body portion 92a is located, and further has a flat plate-shaped connecting portion 92f parallel to the resin plate main body portion 91a. And the connecting portion 92f of the connecting portion 92d is the portion connected to the resin plate main body portion 91a of the resin plate 91. As an example, the resin plate main body portion 91a has a screw-through hole for screwing, and the connecting portion 92f has a screw hole. In this case, the resin plate 91 and the metal plate 92 can be fixed to each other by screwing a screw through the screw-through hole of the resin plate main body portion 91a into the screw hole of the connecting portion 92f.

[0036] In the example shown in FIG. 3, the main body portion 92a, the edge portion 92b, and the connecting portion 92d are integrally formed. More specifically, a single flat plate-shaped metal material is folded to form a metal plate 92 having the main body portion 92a, the edge portion 92b, and the connecting portion 92d.

[0037] A plurality of through holes 71 are provided in the bottom wall portion 13a. The through holes 71 are holes for passing a wood screw 72, which will be described later, and screwing it to the floor 80 when the power storage element unit 10 is installed on the floor.

[0038] FIG. 4 is a partial cross-sectional view showing an enlarged part of the cross-section of the bottom wall portion 13a along the line A-A in FIG. 3. In the example shown in FIGS. 3 and 4, since the standing portion 92e is interposed between the resin plate main body portion 91a and the main body portion 92a, they are separated in the first direction DA. And, a resin plate through-hole 71a penetrating the resin plate main body portion 91a is provided in the resin plate main body portion 91a. Further, a metal plate through-hole 71b penetrating the main body portion 92a is provided in a portion of the main body portion 92a that overlaps the resin plate through-hole 71a in the first direction DA. The resin plate through-hole 71a and the metal plate through-hole 71b form a through-hole 71 that penetrates the bottom wall portion 13a in the thickness direction (first direction DA) of the bottom wall portion 13a. Both the resin plate through-hole 71a and the metal plate through-hole 71b have a circular contour when observed from the thickness direction (first direction DA) of the bottom wall portion 13a. The width w2 of the metal plate through-hole 71b is larger than the width w1 of the resin plate through-hole 71a.

[0039] The number of the through-holes 71 provided in the bottom wall portion 13a is appropriately selected according to the number of the wood screws 72 assumed to be used when installing the power storage element unit 10. In the example shown in FIG. 3, 16 through-holes 71 are provided in the bottom wall portion 13a.

[0040] The plurality of through-holes 71 are arranged along the sides of the bottom wall portion 13a. In the example shown in FIG. 3, the bottom wall portion 13a has a rectangular shape having a pair of long sides 131 and a pair of short sides 132. And, six through-holes 71 are arranged along each of the pair of long sides 131. Also, four through-holes 71 are arranged along each of the pair of short sides 132. Further, as an example, each of the plurality of through-holes 71 is separated from the side wall portion 13c by 1 cm or more.

[0041] Next, the control module 14 will be described. The control module 14 has, for example, one or more of the functions of controlling charging and discharging of a plurality of power storage element modules 20, monitoring the state of charge (e.g., the amount of charge) of the power storage element module 20, and monitoring the presence or absence of abnormalities in the power storage element module 20. Further, the control module 14 may transmit information such as the monitoring results of the state of charge and the presence or absence of abnormalities of the power storage element module 20 to a control device installed outside the power storage element unit 10. Further, the control module 14 may have a switch that switches the electrical connection and disconnection between an external wiring (e.g., building wiring) of the power storage element unit 10 and the power storage element module 20.

[0042] FIG. 5 is a diagram showing a plurality of power storage element modules 20 housed in a storage box 11. As shown in FIG. 5, the power storage element unit 10 has two power storage element module combinations 15. The power storage element module combination 15 has a plurality of power storage element modules 20 stacked in the first direction DA. The two power storage element module combinations 15 are arranged side by side in a second direction DB that is non-parallel to the first direction DA.

[0043] In the illustrated example, the first power storage element module assembly 15A has three power storage element modules 20 stacked in the first direction DA. The second power storage element module assembly 15B is adjacent to the first power storage element module assembly 15A from one side SB1 in the second direction DB. As shown in FIG. 2, the second power storage element module assembly 15B supports the control module 14 from one side SA1 in the first direction DA. FIG. 6 shows one power storage element module 20 included in the power storage element module assembly 15. The plurality of power storage element modules 20 included in the power storage element unit 10 may have different configurations from each other, or may have the same configuration as each other. However, from the viewpoint of improving versatility, it is preferable that the plurality of power storage element modules 20 have the same configuration as each other, and it is preferable that they include at least the same components (for example, the cells 30 and the case 18 described later) as each other. In the illustrated example, the plurality of power storage element modules 20 have the same configuration as each other.

[0044] Each of the power storage element modules 20 has a plurality of cells 30 and a case 18 that houses the plurality of cells 30. The cell 30 is the minimum unit treated as a power storage element. The cell 30 can adopt various types, for example, it can be a lithium ion secondary battery. FIG. 7 shows the plurality of cells 30 included in one power storage element module 20, and FIG. 8 shows one cell 30. The plurality of cells 30 included in one power storage element module 20 may have the same configuration as each other, or may have different configurations from each other.

[0045] As shown in FIGS. 7 and 8, the cell 30 has a flat shape. The cell 30 has a substantially rectangular shape in a plan view (when observed from the first direction DA). The cell 30 has a short side direction in the second direction DB and a long side direction in the third direction DC. A plurality of cells 30 are stacked in the stacking direction. In the illustrated example, the stacking direction of the cells 30 is parallel to the first direction DA. The cell 30 has a central portion 31C located at the center and a peripheral portion 31E surrounding the central portion 31C. The thickness of the central portion 31C is greater than the thickness of the peripheral portion 31E. In the illustrated example, the cell 30 bulges toward one side in the first direction DA at the central portion 31C. The plurality of cells 30 are stacked such that the central portions 31C at least partially face each other in the first direction DA. The cell 30 shown in FIG. 8 has a plurality of electrode plates 32 including a positive electrode plate and a negative electrode plate, an exterior body 33 that houses the plurality of electrode plates 32, and tabs 35 that are electrically connected to the electrode plates 32 and extend to the outside of the exterior body 33. The cell 30 has a pair of tabs 35. The pair of tabs 35 each function as a positive electrode terminal or a negative electrode terminal.

[0046] The cell 30 has a generally symmetric configuration with respect to a reference plane that is a plane along the first direction DA and the third direction DC passing through the center in the second direction DB. Also, the cell 30 has a generally symmetric configuration with respect to a reference plane that is a plane along the first direction DA and the second direction DB passing through the center in the third direction DC.

[0047] A large number of cells 30 included in one energy storage element module 20 are electrically connected to each other by series connection or parallel connection by electrically connecting the tabs 35 of each other. The tabs 35 of the large number of cells 30 are electrically connected to each other using, for example, an electrode member (not shown). By appropriately setting the number and connection of the cells 30 in series and in parallel, the output from one cell 30 can be set to a desired voltage and a desired capacitance. In the illustrated example, one energy storage element module 20 includes 16 cells 30. In particular, in the example shown in FIG. 7, two cells 30 connected in parallel are connected in series in 8 sets.

[0048] The specific configuration of the energy storage element module 20 will be described in further detail. Here, FIG. 9 is a perspective view showing the energy storage element module 20 with a cover 60, which will be described later, removed from a case body 40, which will be described later.

[0049] As shown in FIGS. 6 and 9, the energy storage element module 20 has a case 18 for housing a plurality of cells. The case 18 defines a storage space for housing a plurality of cells on its inner surface. The case 18 has a case body 40 and a cover 60. The cover 60 is removable from the case body 40. Further, the energy storage element module 20 has a first end cover 21 and a second end cover 22 fixed to the case body 40.

[0050] The case body 40 for housing a plurality of cells 30, as an overall configuration, has a bottom 42 that supports the plurality of cells 30 from one side SA1 in the first direction DA, and a case side wall portion 44 that rises from the bottom 42 in the first direction DA. The case body 40 is open on the other side in the first direction DA. That is, the case body 40 has a case opening 40a at a position facing the bottom 42. The case side wall portion 44 surrounds the cells 30 from the second direction DB and the third direction DC. More precisely, the case side wall portion 44 surrounds the exterior body 33 of the cells 30 from the second direction DB and the third direction DC. The case side wall portion 44 extends along the outer edge of the exterior body 33 of the cells 30 in an observation from the first direction DA.

[0051] The cover 60 is held by the case body 40 so as to be movable in the first direction DA and covers the case opening 40a of the case body 40. The cover 60 covers the cells 30 housed in the case body 40 from the other side in the first direction DA and protects the cells 30.

[0052] As shown in FIGS. 6 and 9, the cover 60 has a cover body 61 and a fixing portion 62 extending from the cover body 61. The fixing portion 62 can be engaged with a receiving portion 49 provided on the case side wall portion 44 of the case body 40. When the fixing portion 62 engages with the receiving portion 49, the cover 60 is held by the case body 40. In the illustrated example, the fixing portion 62 engages with the receiving portion 49 so as to be movable in the first direction DA.

[0053] The case body 40 and the cover 60 each included in the power storage element unit 10 are formed using, for example, an insulating material. The cover 60 can be integrally molded from an insulating resin material as a whole. The case body 40 can be integrally molded from an insulating resin material as a whole.

[0054] As an example, each of the cases 18 included in the power storage element unit 10 is composed of a resin material. In the case 18 having the case body 40 and the cover 60 as shown in FIG. 6, the case body 40 and the cover 60 are composed of a resin material. The resin material constituting the case 18 is, for example, the same resin material as that of the resin plate 91.

[0055] Next, the wood screw 72 will be described. As an example, the "wood screw" refers to a screw that can be screwed into a member such as wood to be screwed even if the member does not have a female screw, by bringing the tip into contact with the member and rotating it.

[0056] FIG. 10 is a view showing a part of the cross section of the bottom wall portion 13a along the line A-A of FIG. 3 in the power storage element unit 10 installed on the floor 80 of a building, together with the cross section of the wood screw 72.

[0057] As shown in FIG. 10, the wood screw 72 has a head 72b and a shaft portion 72a extending from the head 72b. Although not shown, at least a part of the shaft portion 72a is provided with a helical thread.

[0058] As shown in FIG. 10, the wood screw 72 passes through the through hole 71 provided in the bottom wall portion 13a and is screwed to the floor 80 of the building. In the example shown in FIG. 10, the width w3 of the shaft portion 72a in the radial direction DD of the wood screw 72 perpendicular to the extending direction of the axis L1 of the wood screw 72 is equal to or less than the width w2 of the metal plate through hole 71b. Further, the width w4 of the head portion 72b in the radial direction DD of the wood screw 72 is larger than the width w2 of the metal plate through hole 71b and equal to or less than the width w1 of the resin plate through hole 71a. Thereby, the shaft portion 72a passes through the resin plate through hole 71a and is screwed to the floor 80, and the head portion 72b is accommodated between the resin plate main body portion 91a and the main body portion 92a in the first direction DA.

[0059] The number of wood screws 72 provided in the power storage element unit 10 can be appropriately selected according to the number of through holes 71 provided in the bottom wall portion 13a and the vibration of the assumed power storage element unit 10. The assumed vibration of the power storage element unit 10 is, for example, the maximum vibration among the vibrations of the power storage element unit 10 assumed according to the characteristics of the building including the floor 80 on which the power storage element unit 10 is installed and the position of the floor 80 in the building where the power storage element unit 10 is installed. Further, the assumed vibration of the power storage element unit 10 is, for example, the maximum vibration among the vibrations of the power storage element unit 10 assumed to occur when shaken by an earthquake when an earthquake occurs. As an example, even when the power storage element unit 10 is installed in the same building, when it is installed on a higher floor 80, it can be assumed that it vibrates more greatly due to an earthquake than when it is installed on a lower floor 80.

[0060] As an example, when the assumed vibration of the energy storage element unit 10 is 1530 Gal or less, the energy storage element unit 10 includes 12 or more wooden screws 72. Further, when the assumed vibration of the energy storage element unit 10 is greater than 1530 Gal and 2600 Gal or less, the energy storage element unit 10 may include 16 or more wooden screws 72. Further, when the assumed vibration of the energy storage element unit 10 is greater than 2600 Gal and 3931 Gal or less, the energy storage element unit 10 may include 21 or more wooden screws 72. By providing the energy storage element unit 10 with the above number of wooden screws 72 according to the assumed vibration of the energy storage element unit 10, the energy storage element unit 10 can be installed to have sufficient resistance to the assumed vibration.

[0061] Here, the energy storage element unit 10 having "resistance" to vibration means, for example, that the energy storage element unit 10 does not fall even when the energy storage element unit 10 vibrates. Further, "having resistance" may mean that even when the energy storage element unit 10 vibrates, the energy storage element unit 10 does not fall and normal operation of the energy storage element unit 10 is possible. Further, "having resistance" may mean that even when the energy storage element unit 10 vibrates, the energy storage element unit 10 does not fall, normal operation of the energy storage element unit 10 is possible, and the appearance of the energy storage element unit 10 is not damaged. Further, "having resistance" may mean that no destruction of internal components occurs when the energy storage element unit 10 vibrates. Further, "Gal" is a unit of acceleration. For example, a vibration of 1 Gal means a vibration with an acceleration of 1 cm / s 2 of vibration.

[0062] In this embodiment, an example in which the power storage element unit 10 has 16 wood screws 72 will be described. FIG. 11 is a plan view showing the bottom wall portion 13a of the power storage element unit 10 and the wood screws 72 as viewed from the inside of the storage box 11 (the side opposite to the one side SA1 in the first direction DA, that is, the upper side in FIG. 3). As described above, 16 through holes 71 are provided in the bottom wall portion 13a according to this embodiment. That is, in this embodiment, the number of the wood screws 72 is the same as the number of the through holes 71. For this reason, in this embodiment, the wood screws 72 penetrate each of all of the plurality of through holes 71 from above and are screwed to the floor 80.

[0063] The floor 80 on which the power storage element unit 10 is installed will be described. The form of the floor 80 is not particularly limited as long as it is possible to screw the wood screws 72. The floor 80 shown in FIG. 10 has a floor board 81 and a gypsum board 82 stacked on the floor board 81. In the example shown in FIG. 10, the gypsum board 82 overlaps the floor board 81 from the upper side (the side opposite to the one side SA1 in the first direction DA).

[0064] The floor board 81 and the gypsum board 82 used for the floor 80 are not particularly limited as long as they can be used for screwing the wood screws 72. As the floor board 81, for example, those used for the floor of a general house are used. The material of the floor board 81 is, for example, wood. As the gypsum board 82, for example, those used as building materials and particularly used for the floor of a general house are used. By having the floor 80 have the floor board 81 and the gypsum board 82 as shown in FIG. 10, it is possible to facilitate screwing the wood screws 72 to the floor 80.

[0065] In the example shown in FIG. 10, the floor 80 further has floor joists 83. The floor joists 83 are members that support the floor board 81 from below. The material of the floor joists 83 is, for example, wood. In the example shown in FIG. 10, the floor 80 has a plurality of floor joists 83 having a rectangular columnar shape extending in the second direction DB. In the example shown in FIG. 10, the plurality of floor joists 83 are arranged at equal intervals in the third direction DC.

[0066] Here, the wood screw 72 is preferably screwed at a position overlapping the joist 83 in the thickness direction of the floor 80 (the first direction DA in FIG. 10). As a result, as shown in FIG. 10, the wood screw 72 can be screwed to the floor 80 so that the tip thereof enters up to the position of the joist 83. Therefore, the power storage element unit 10 can be more firmly fixed on the floor 80.

[0067] Also, it is preferable that the power storage element unit 10 is arranged on the floor 80 so that the through holes 71 overlap the joist 83 in the thickness direction of the floor 80. As a result, the wood screw 72 can be screwed at a position overlapping the joist 83 in the thickness direction of the floor 80.

[0068] Also, the arrangement of the plurality of through holes 71 in the bottom wall portion 13a is preferably an arrangement in which each of the plurality of through holes 71 can overlap the joist 83 in the thickness direction of the floor 80. For example, by making the interval at which the plurality of joists 83 are arranged correspond to the interval at which the plurality of through holes 71 are arranged, each of the plurality of through holes 71 can overlap the joist 83. For example, as shown in FIG. 10, when a plurality of joists 83 extending in the second direction DB are arranged at equal intervals in the third direction DC, the interval at which the plurality of joists 83 are arranged in the third direction DC and the interval at which the plurality of through holes 71 are arranged in the third direction DC may be made to coincide. As a result, each of the plurality of through holes 71 can overlap the joist 83.

[0069] In the present embodiment, the plurality of wood screws 72 penetrate each of the plurality of through holes 71 provided in the bottom wall portion 13a from above and are screwed to the floor 80, whereby the power storage element unit 10 can be firmly fixed on the floor 80. As a result, the power storage element unit 10 can be installed so as to have sufficient resistance to vibration. In particular, the power storage element unit 10 can be installed so as to have sufficient resistance to vibration caused by an earthquake.

[0070] Next, an example of an installation method for installing the above-described power storage element unit 10 on the floor 80 of a building will be described. First, as shown in FIG. 12, the storage box 11 in a state where only the upper wall portion 13b is removed and the upper opening 11a is formed is arranged on the floor 80 of the building.

[0071] Next, a screwing step is performed in which a plurality of wood screws 72 are passed through the plurality of through holes 71 from above and screwed to the floor 80. When installing the power storage element unit 10 shown in FIGS. 1 to 11 on the floor 80, 16 wood screws 72 are passed through each of all 16 through holes 71 from above and screwed to the floor 80. The screwing work can be performed through the opening 11a of the storage box 11 shown in FIG. 12. For example, after inserting the wood screw 72 into the through hole 71, the wood screw 72 can be screwed to the floor 80 by rotating the wood screw 72 using an electric driver or the like.

[0072] Here, as described above, since each of the plurality of through holes 71 is separated from the side wall portion 13c by 1 cm or more, the following effects can be obtained. When inserting the wood screw 72 into the through hole 71 and rotating the wood screw 72 using an electric driver or the like, the side wall portion 13c can be made less likely to interfere with the work.

[0073] Next, the plurality of power storage element modules 20 and the control module 14 are stored in the storage box 11 through the opening 11a of the storage box 11. Then, the upper wall portion 13b is attached to close the opening 11a. Thereby, the power storage element unit 10 can be installed on the floor 80 of the building. It should be noted that the installation method for installing the above-described power storage element unit 10 on the floor 80 of the building can also be said to be a manufacturing method of a building including the floor 80 and the power storage element unit 10 installed on the floor 80.

[0074] As described above, the embodiments have been described with reference to specific examples, but the specific examples described above are not intended to limit the embodiments. The above-described embodiments can be implemented with various other specific examples, and various omissions, replacements, and changes can be made without departing from the gist thereof. Hereinafter, modified examples of the present embodiment will be described.

[0075] (Modified Example 1) In the above-described embodiment, an example has been described in which the wood screw 72 passes through all of the plurality of through holes 71 from above and is screwed to the floor 80. However, the relationship between the wood screw 72 and the through hole 71 is not limited to this. FIG. 13 is a plan view showing the bottom wall portion 13a of the power storage element unit 10 and the wood screw 72 in Modified Example 1 as viewed from the inside of the storage box 11 (the side opposite to the one side SA1 in the first direction DA).

[0076] In the power storage element unit 10 according to Modified Example 1, as shown in FIG. 13, the wood screw 72 passes through each of a part selected from the plurality of through holes 71 from above and is screwed to the floor 80. In the example shown in FIG. 13, out of the 16 through holes 71 provided in the bottom wall portion 13a, 12 through holes 71 are passed through by the wood screw 72. In particular, out of the 16 through holes 71, 12 through holes 71 arranged along a pair of long sides 131 of the bottom wall portion 13a are passed through by the wood screw 72.

[0077] Further, in the method of installing the power storage element unit 10, in the screwing step, the through holes 71 through which the wood screw 72 passes through the plurality of through holes 71 can be selected according to the assumed vibration of the power storage element unit 10. For example, in the screwing step, according to the assumed vibration of the power storage element unit 10, it is possible to select whether to pass the wood screw 72 through all the through holes 71 as shown in FIG. 11 or to pass the wood screw 72 through some of the through holes 71 as shown in FIG. 13. Also, when passing the wood screw 72 through some of the through holes 71, it is possible to select how many through holes 71 to pass the wood screw 72 through.

[0078] Select the through holes 71 through which the wood screws 72 pass from the plurality of through holes 71 according to the vibration of the assumed power storage element unit 10, and in some cases, pass the wood screws 72 only through a part selected from the plurality of through holes 71, thereby obtaining the following effects. According to the vibration of the assumed power storage element unit 10, the number of wood screws 72 to be used can be reduced. Also, according to the vibration of the assumed power storage element unit 10, the amount of work when screwing the wood screws 72 can be reduced. Further, it is possible to suppress the unnecessary formation of holes for screwing the wood screws 72 in the floor 80 of the building.

[0079] (Modification 2) FIG. 14 is a plan view showing a state of the bottom wall portion 13a of the power storage element unit 10 in Modification 2 as viewed from the inside of the storage box 11 (the side opposite to the one side SA1 in the first direction DA). As shown in FIG. 14, the bottom wall portion 13a may have an indication portion 73 that indicates the through holes 71 through which the wood screws 72 should pass among the plurality of through holes 71 according to the magnitude of the vibration of the assumed power storage element unit 10.

[0080] As an example, the indication portion 73 is an indication formed on the surface of the bottom wall portion 13a that indicates the through holes 71 through which the wood screws 72 should pass according to the magnitude of the vibration of the assumed power storage element unit 10. In this case, the operator of the work of installing the power storage element unit 10 on the floor 80 can grasp the number and arrangement of the through holes 71 through which the wood screws 72 should pass according to the magnitude of the vibration of the assumed power storage element unit 10 by visually recognizing the indication portion 73.

[0081] In the example shown in FIG. 14, the indicating portion 73 is a plurality of circular symbols each displayed so as to surround one through-hole 71 when the bottom wall portion 13a is viewed from the inside of the storage box 11. In the example shown in FIG. 14, the circular symbols that are the indicating portion 73 are indicated by broken lines. In the example shown in FIG. 14, among the 16 through-holes 71, circular symbols are attached to 12 through-holes 71 arranged along a pair of long sides 131 of the bottom wall portion 13a. And, for example, when the assumed value of the vibration acceleration at which the power storage element unit 10 vibrates is equal to or less than a certain value, the wood screw 72 is passed only through the through-holes 71 to which the circular symbols are attached, but when the vibration acceleration exceeds the certain value, it is decided that the wood screw 72 is passed through all the through-holes 71. Thus, the operator can grasp the number and arrangement of the through-holes 71 through which the wood screw 72 should be passed according to the assumed value of the vibration acceleration.

[0082] Note that the indicating portion 73 is not limited to circular symbols, and can be widely used as long as it is a display that allows the operator of the work of installing the power storage element unit 10 to recognize the through-holes 71 through which the wood screw 72 should be passed. For example, the indicating portion 73 may be a symbol other than a circle or may be a character. Also, the method of forming the display on the surface of the bottom wall portion 13a as the indicating portion 73 is not particularly limited. For example, the display that is the indicating portion 73 may be drawn with paint or may be engraved on the surface of the bottom wall portion 13a.

[0083] By the bottom wall portion 13a having the indicating portion 73, the following effects can be obtained. When screwing the wood screw 72 through a part selected from the plurality of through-holes 71 and screwing it to the floor 80, when the through-holes 71 through which the wood screw 72 should be passed are determined from the viewpoint of the balance of the screwing fastening force, etc., the operator can be guided to pass the wood screw 72 through the through-holes 71.

[0084] Also, in the installation method of installing the power storage element unit 10 in which the bottom wall portion 13a has the indicating portion 73, in the screwing step, the through-holes 71 through which the wood screw 72 is passed may be selected from the plurality of through-holes 71 according to the indicating portion 73.

[0085] Aspects of the present invention are not limited to the above-described embodiments, but also include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-described content. That is, various additions, changes, and partial deletions are possible without departing from the conceptual ideas and spirit of the present invention derived from the content defined in the claims and their equivalents.

Explanation of Reference Numerals

[0086] 10 Energy storage element unit 11 Storage box 13 Wall portion 131 Long side 132 Short side 13a Bottom wall portion 13b Upper wall portion 13c Side wall portion 71 Through hole 71a Resin plate through hole 71b Metal plate through hole 72 Wood screw 72a Shaft portion 72b Head portion 73 Indicator portion 80 Floor 81 Floor board 82 Gypsum board 83 Floor joist

Claims

1. An energy storage element unit installed on a floor of a building, A storage box having a bottom wall portion with a plurality of through holes; A plurality of energy storage element modules stored in the storage box; and a plurality of wood screws that pass through all of the plurality of through holes or each of a selected portion of the plurality of through holes from above and are screwed into the floor.

2. The energy storage element unit according to claim 1 , wherein the wood screws are screwed to the floor by passing through a selected portion of the plurality of through holes from above.

3. When an expected vibration of the energy storage element unit is 1530 Gal or less, the energy storage element unit includes 12 or more wood screws, When an expected vibration of the energy storage element unit is greater than 1530 Gal and equal to or less than 2600 Gal, the energy storage element unit includes 16 or more wood screws, The energy storage element unit according to claim 1 or 2, wherein when an expected vibration of the energy storage element unit is greater than 2600 Gal and less than or equal to 3931 Gal, the energy storage element unit includes 21 or more wood screws.

4. The storage box has a side wall portion that is connected to an edge of the bottom wall portion at an edge portion and perpendicular to the bottom wall portion, The energy storage element unit according to claim 1 , wherein each of the plurality of through holes is spaced from the side wall portion by 1 cm or more.

5. The energy storage element unit according to claim 1 , wherein the bottom wall portion has an indication portion that indicates which of the plurality of through holes the wood screw should be passed through depending on the magnitude of expected vibration of the energy storage element unit.

6. A floor having a floor plate and a gypsum board overlying the floor plate; A building comprising: an energy storage element unit installed on the floor, the energy storage element unit including: a storage box having a bottom wall portion with a plurality of through holes; a plurality of energy storage element modules stored in the storage box; and a plurality of wood screws that pass through all of the plurality of through holes or a selected portion of the plurality of through holes from above and are screwed to the floor.

7. 1. A method for installing an energy storage element unit on a floor of a building, comprising the steps of: the energy storage element unit includes a storage box having a bottom wall portion with a plurality of through holes, a plurality of energy storage element modules stored in the storage box, and a plurality of wood screws; An installation method comprising a screwing step of passing the wood screws through all of the plurality of through holes or through each of a selected portion of the plurality of through holes from above and screwing the wood screws into the floor.

8. The installation method according to claim 7 , wherein in the screwing step, a through hole through which the wood screw is to be inserted is selected from the plurality of through holes depending on expected vibration of the energy storage element unit.

Images