Packaging, packaging material, control module packaging, and storage box packaging

Abstract

To provide a package that facilitates transportation of components that constitute a power storage element unit.SOLUTION: A package formed by packing one power storage element module out of a plurality of power storage element modules 20 to be mounted on an indoor installation power storage element unit includes one storage element module, and a box material 51 packed with the power storage element module, and the box material has a rectangular parallelepiped shape having a first side 51a, a second side 51b that forms a bottom surface together with the first side and is shorter than the first side, and a third side 51c that is perpendicular to the bottom surface, and the first side has a length of 750 mm or less, and the total length of the first, second, and third sides is 1200 mm or less.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a package, a packaging material, a control module package, and a storage box package. [Background technology]

[0002] For example, an energy storage element unit having a plurality of energy storage element modules is known, as disclosed in Patent Document 1. The energy storage element unit includes a plurality of energy storage element modules and a storage box for storing the energy storage element modules. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-5027 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, there has been a demand for facilitating the transportation of components that constitute an energy storage element unit, such as the energy storage element modules mounted on the energy storage element unit and the storage boxes provided in the energy storage element unit.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to facilitate the transportation of components that constitute an energy storage element unit. [Means for solving the problem]

[0006] The package according to the present disclosure comprises: A package that packages one energy storage element module out of a plurality of energy storage element modules mounted in an energy storage element unit for indoor installation, the one energy storage element module; a box material in which the energy storage element module is packed, the box member has a rectangular parallelepiped shape having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface; The first side has a length of 750 mm or less, The total length of the first side, the second side, and the third side is 1200 mm or less.

[0007] In a package according to the present disclosure, The length of the first side may be 1.05 to 1.3 times the dimension of the energy storage element module in the direction in which the first side extends.

[0008] In a package according to the present disclosure, the energy storage element module has a pair of first module side surfaces facing a pair of first side surfaces formed by the first side and the third side of the box material, and a pair of second module side surfaces facing a pair of second side surfaces formed by the second side and the third side of the box material, a buffer material having a first wall portion interposed between the pair of first side surfaces and the pair of first module side surfaces, and a second wall portion interposed between the pair of second side surfaces and the pair of second module side surfaces, The second wall may have an opening formed therein.

[0009] In a package according to the present disclosure, The second wall portion may have a thickness greater than the thickness of the first wall portion.

[0010] In a package according to the present disclosure, The energy storage element module may have a connection portion to which wiring can be connected, the connection portion being provided on a portion of the second module side surface facing the opening.

[0011] In a package according to the present disclosure, a device wiring that is connected at one end to the connection portion and is packed in the box together with the energy storage element module; The storage device may further include a holding member that holds the other end of the device wiring above the energy storage element module.

[0012] The packaging material according to the present disclosure comprises: A packaging material for packaging one energy storage element module among a plurality of energy storage element modules mounted in an energy storage element unit for indoor installation, comprising: the packaging material includes a box material having a rectangular parallelepiped shape, the box material having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface; The first side has a length of 750 mm or less, The total length of the first side, the second side, and the third side is 1200 mm or less.

[0013] A control module package according to the present disclosure includes: A control module package that packages a control module to be mounted on an indoor storage element unit, the control module; a control module box in which the control module is packed, the control module box has a rectangular parallelepiped shape having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface; The first side has a length of 750 mm or less, The total length of the first side, the second side, and the third side is 1200 mm or less.

[0014] The storage box package according to the present disclosure comprises: A storage box package formed by packaging a storage box used for an indoor installation energy storage element unit, The storage box; and a storage box material in which the storage box is packed, The storage box material has a rectangular parallelepiped shape having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface, The second side has a length of 750 mm or less. [Effects of the Invention]

[0015] According to the present disclosure, it is possible to facilitate the transportation of components that constitute an energy storage element unit. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram for explaining the first embodiment, and is a perspective view showing a package. [Figure 2] FIG. 2 is a perspective view showing an energy storage element unit on which an energy storage element module is mounted. [Figure 3] FIG. 3 is a perspective view showing the energy storage element module. [Figure 4] FIG. 4 is a perspective view showing a plurality of cells included in the energy storage element module of FIG. [Figure 5] FIG. 5 is a perspective view showing the energy storage element module of FIG. 3, with the cover removed from the case body. [Figure 6] FIG. 6 is an exploded view showing the packaging body of FIG. 1, separated into each of the components constituting the packaging material, the energy storage element modules, and the device wiring. [Figure 7] FIG. 7 is a cross-sectional view of the package taken along line AA in FIG. [Figure 8] 8 is a perspective view showing the energy storage element module, device wiring, pressing members, and holding members included in the development view of FIG. [Figure 9] 9 is a perspective view showing the receiving member included in the development view of FIG. 6. FIG. [Figure 10] FIG. 10 is a perspective view showing the cushioning material included in the development view of FIG. [Figure 11] FIG. 11 is a diagram for explaining the second embodiment, and is a perspective view showing a control module package. [Figure 12] FIG. 12 is an exploded view of the control module packaging of FIG. 11, showing the components that make up the control module packaging and the control module. [Figure 13]FIG. 13 is a diagram for explaining the third embodiment, and is a perspective view showing a storage box package. [Figure 14] FIG. 14 is a perspective view showing an energy storage element unit on which an energy storage element module is mounted. [Figure 15] Figure 15 is an exploded view showing the storage box packaging body of Figure 14, divided into each of the components that make up the storage box packaging material, the storage box, the decorative panel main body, the decorative panel first side, the decorative panel second side, and the decorative panel upper part. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described below with reference to the drawings. In the drawings accompanying this specification, the scale and aspect ratios have been appropriately changed and exaggerated from those of the actual objects for the sake of clarity and ease of understanding.

[0018] (First embodiment) Hereinafter, an example of an embodiment of a package according to a first embodiment of the present disclosure will be described in detail with reference to FIGS.

[0019] FIG. 1 is a perspective view showing a packaging body 100. The packaging body 100 according to the first embodiment is configured to package one energy storage element module 20, which will be described later. The packaging body 100 includes one energy storage element module 20 and a packaging material 50 that packages the one energy storage element module 20. As shown in FIG. 1, the packaging material 50 includes a box material 51. As will be described later, the box material 51 packages one energy storage element module 20.

[0020] In order to clarify the directional relationships between the drawings, some of the drawings use arrows to indicate the first direction DA, the second direction DB, and the third direction DC as directions common to the drawings. Furthermore, the diagram showing the energy storage element module 20 included in the packaging body 100 shows the direction and orientation when the energy storage element module 20 is packed in the packaging material 50 to form the packaging body 100. Furthermore, the diagram showing the energy storage element unit 10 on which the energy storage element module is mounted shows the direction and orientation when the energy storage element module 20 mounted on the energy storage element unit 10 is packed in the packaging material 50 to form the packaging body 100. Furthermore, the diagram showing the control module packaging body 200 described below shows the direction and orientation of the control module 14 packed in the control module packaging body 200 when it is mounted on the energy storage element unit 10 as shown in FIG. 2 described below. Furthermore, the diagram showing the storage box packaging body 300 described below shows the direction and orientation of the storage box 11 packed in the storage box packaging body 300 when it is used in the energy storage element unit 10 as shown in FIG. 2 described below. Furthermore, in this specification, unless otherwise specified, expressions relating to directions such as "upper," "lower," and "side" are written based on the case where the packaging body 100 is installed so that the bottom surface 513 (described later) of the box material 51 is positioned downward as shown in FIG. 1.

[0021] The energy storage element modules 20 packed in the packaging material 50 will now be described. Fig. 2 is a perspective view showing an energy storage element unit 10 on which a plurality of energy storage element modules 20 packed in the packaging material 50 are mounted. Note that Fig. 2 does not show a wall portion of a storage box 11 described later that forms the top surface of the energy storage element unit 10 when the energy storage element unit 10 is installed, and two of the wall portions (those located on the front side in Fig. 2) that form the side surfaces of the energy storage element unit 10.

[0022] The energy storage element unit 10 is used as a secondary battery unit that can be charged and discharged. The illustrated energy storage element unit 10 is an energy storage element unit 10 for indoor installation, and is applied to buildings such as homes and public facilities, and is electrically connected to the building wiring to function as a power source for electrical devices installed in the building.

[0023] 2, the energy storage element unit 10 has a storage box 11 having a substantially rectangular parallelepiped shape, a control module 14, and a plurality of energy storage element modules 20. The control module 14 has, for example, one or more of the following functions: a function to control charging and discharging of the plurality of energy storage element modules 20; a function to monitor the charge 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 plurality of energy storage element modules 20 are mounted on the energy storage element unit 10 by being stored in the storage box 11.

[0024] In the example shown in FIG. 2, the storage box 11 contains two energy storage element module assemblies 15, each formed by stacking a plurality of energy storage element modules 20 in the height direction. The first energy storage element module assembly 15A is formed by stacking three energy storage element modules 20. The second energy storage element module assembly 15B is formed by stacking four energy storage element modules 20. The first energy storage element module assembly 15A and the second energy storage element module assembly 15B are arranged in parallel and housed in the storage box 11. Therefore, the energy storage element unit 10 has a total of seven energy storage element modules 20 mounted thereon.

[0025] FIG. 3 is a perspective view showing one of the energy storage element modules 20 mounted on the energy storage element unit 10. The energy storage element module 20 has a generally rectangular parallelepiped shape as a whole. In the example shown in FIG. 3, the energy storage element module 20 has a pair of first module side surfaces 20a parallel to the first direction DA and the third direction DC, and a pair of second module side surfaces 20b parallel to the first direction DA and the second direction DB. The energy storage element module 20 also has a module bottom surface 20c and a module top surface 20d parallel to the first direction DA and the second direction DB.

[0026] Furthermore, the energy storage element module 20 has a larger dimension in the third direction DC than in the second direction DB. In the example shown in Fig. 3, the dimension of the first module side surface 20a in the third direction DC is larger than the dimension of the second module side surface 20b in the second direction DB.

[0027] FIG. 4 is a perspective view showing a plurality of cells 30 included in the energy storage element module 20 of FIG. 3. The energy storage element module 20 has a plurality of cells 30 and a case 18 that houses the plurality of cells 30. The cell 30 is the smallest unit that can be used as an energy storage element. Various types of cells 30 can be employed, and for example, they can be lithium-ion secondary batteries. The plurality of cells 30 included in one energy storage element module 20 may have the same configuration as each other, or may have different configurations from each other.

[0028] As shown in FIG. 4, the cell 30 has a flat shape. The cell 30 has a substantially rectangular shape in a plan view (observed from the first direction DA). The cell 30 has a short side in the second direction DB and a long side in the third direction DC. The multiple cells 30 are stacked in a stacking direction. The stacking direction of the cells 30 is parallel to the first direction DA. The cell 30 has a central portion 31C located in 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 central portion 31C of the cell 30 bulges out toward either side in the first direction DA. The multiple cells 30 are stacked such that the central portions 31C at least partially face each other in the first direction DA. 4 includes a plurality of electrode plates 32 including positive and negative electrode plates, 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 includes a pair of tabs 35. The pair of tabs 35 function as a positive electrode terminal or a negative electrode terminal, respectively.

[0029] The many cells 30 included in one energy storage element module 20 are electrically connected to one another through series or parallel connection by electrically connecting their tabs 35 to one another. The tabs 35 of the many cells 30 are electrically connected to one another using, for example, electrode members (not shown). In the illustrated example, one energy storage element module 20 includes 16 cells 30. In particular, in the example shown in FIG. 4, eight pairs of parallel-connected cells 30 are connected in series.

[0030] The case 18 of the energy storage element module 20 will now be described. Fig. 5 is a perspective view showing the energy storage element module 20 with a cover 60 (described later) removed from a case main body 40 (described later).

[0031] As shown in Fig. 5, the energy storage element module 20 has a case 18 for housing a plurality of cells. The case 18 defines a housing space on its inner surface for housing the plurality of cells. The case 18 has a case main body 40 and a cover 60. The cover 60 is detachable from the case main body 40.

[0032] The case body 40, which houses the multiple cells 30, has, as an overall configuration, a bottom 42 that supports the multiple cells 30 from one side in the first direction DA, and a case sidewall 44 that rises from the bottom 42 in the first direction DA. The case body 40 is open to 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 sidewall 44 surrounds the cells 30 from the second direction DB and the third direction DC. The case body 40 also has the case opening 40a in the first direction DA.

[0033] 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, protecting the cells 30.

[0034] 5, the cover 60 has a cover main body 61 and a fixing portion 62 extending from the cover main body 61. The fixing portion 62 is engageable with a receiving portion 49 provided on the case side wall portion 44 of the case main body 40. The fixing portion 62 engages with the receiving portion 49, thereby holding the cover 60 in place by the case main body 40. In the example shown, the fixing portion 62 engages with the receiving portion 49 so as to be movable in the first direction DA.

[0035] 3 and 5, a portion of the case sidewall 44 forms a pair of first module side surfaces 20a. The bottom 42 of the case body 40 forms a module bottom surface 20c. The cover body 61 forms a module top surface 20d.

[0036] The energy storage element module 20 also has an end cover 21 fixed to the case body 40. In the example shown in Fig. 3 and Fig. 5, a pair of end covers 21 are provided on one side and the other side of the energy storage element module 20 in the third direction DC. One of the pair of end covers 21 constitutes one of the pair of second module side surfaces 20b. The other of the pair of end covers 21 constitutes the other of the pair of second module side surfaces 20b.

[0037] The pair of end covers 21 cover one and the other surfaces of the case body 40 in the third direction DC. As an example, electrode members that electrically connect the tabs 35 of the multiple cells 30 to one another are held on the one and the other surfaces of the case body 40 in the third direction DC. In this case, one of the pair of end covers 21 covers the electrode members located on one side of the case body 40 in the third direction DC. The other of the pair of end covers 21 covers the electrode members located on the other side of the case body 40 in the third direction DC. In this way, the electrode members are protected by the pair of end covers 21.

[0038] The energy storage element module 20 also has a connection portion 22 to which wiring can be connected. In the example shown in FIGS. 3 and 5, the connection portion 22 is provided on one of the pair of second module side surfaces 20b. In the example shown in FIGS. 3 and 5, the connection portion 22 is a portion where openings 22a are provided in the pair of end covers 21, and where internal wiring arranged inside the case main body 40 is drawn out to the vicinity of the openings 22a. The internal wiring is electrically connected to the tabs 35 of the cells 30, for example, via electrode members. In this case, external wiring of the energy storage element module 20 can be electrically connected to the internal wiring at the connection portion 22.

[0039] As described above, the energy storage element modules 20 have a larger dimension in the third direction DC than in the second direction DB. The energy storage element modules 20 are arranged parallel to the third direction DC. In this case, when a plurality of energy storage element modules 20 are housed in the storage box 11 as shown in FIG. 2 , one energy storage element module 20 can be arranged adjacent to another energy storage element module 20 in the first direction DA and the second direction DB. In contrast, one energy storage element module 20 is not adjacent to another energy storage element module 20 in the third direction DC. For this reason, components provided on the surface of the energy storage element module 20, such as the connection portion 22, are preferably provided on the second module side surface 20b, from the viewpoint of allowing adjacent energy storage element modules 20 to be used without getting in the way when a plurality of energy storage element modules 20 are housed in the storage box 11.

[0040] The case body 40 and cover 60 of each case 18 included in the energy storage element unit 10, as well as the pair of end covers 21, are made of, for example, an insulating resin material.

[0041] In the example shown in Fig. 3, device wiring 70, which is wiring external to the energy storage element module 20, is connected to the connection portion 22 of the energy storage element module 20. The device wiring 70 is connected to the connection portion 22 at one end 71. Although not shown in Fig. 3, as will be described later, the device wiring 70 has a connector 72a at the other end 72, which is the end opposite to the one end 71. By attaching the connector 72a to a device external to the energy storage element module 20, the energy storage element module 20 can be electrically connected to the device external to the energy storage element module 20 via the device wiring 70.

[0042] Next, the packaging body 100 in which the above-described energy storage element module 20 is packaged will be described in detail. Fig. 6 is an exploded view of the packaging body 100 shown in Fig. 1, showing each of the components constituting the packaging material 50, the energy storage element module 20, and the device wiring 70. Fig. 7 is a cross-sectional view of the packaging body 100 taken along line AA in Fig. 1. Note that in Figs. 6 and 7, the detailed structures of the energy storage element module 20 and the device wiring 70 are not shown, and only their outlines are shown. Furthermore, in Figs. 6 and 7, the detailed structures of a holding member 56, which will be described later, are not shown, and only their outlines are shown by dashed lines. Furthermore, in Figs. 6 and 7, the tape 58, which will be described later, is not shown.

[0043] The package 100 includes, as the packaging material 50, a box material 51, cushioning material 52, a receiving member 53, a resin bag 54, a pressing member 55, a holding member 56, and a top pad 57. The package 100 also includes the energy storage element module 20 as described above, as well as device wiring 70. The device wiring 70 is packed in the box material 51 together with the energy storage element module 20.

[0044] The box material 51 will be described. The box material 51 is a box for packaging the energy storage element module 20. In the example shown in FIG. 7, the box material 51 accommodates the energy storage element module 20, the device wiring 70, the cushioning material 52, the receiving member 53, the resin bag 54, the pressing member 55, the holding member 56, and the top pad 57. When the package 100 is formed as shown in FIGS. 1 and 7, the box material 51 is closed. When the box material 51 is closed, the box material 51 has a rectangular parallelepiped shape having a first side 51a, a second side 51b that forms a bottom surface 513 together with the first side 51a and is shorter than the first side 51a, and a third side 51c that is perpendicular to the bottom surface 513. In the example shown in FIG. 1, the first side 51a extends in the third direction DC. The second side 51b extends in the second direction DB. The third side 51c extends in the first direction DA.

[0045] In the package 100, the box material 51 has a pair of first side surfaces 511 formed by a first side surface 51a and a third side surface 51c, and a pair of second side surfaces 512 formed by a second side surface 51b and a third side surface 51c. In addition, a bottom surface 513 and a top surface 514, which is a surface parallel to the bottom surface 513 of the box material 51, are each formed by the first side surface 51a and the second side surface 51b.

[0046] The material of the box material 51 is not particularly limited as long as it is possible to pack the energy storage element modules 20 and the device wiring 70 in the box material 51. In the example shown in Figures 6 and 7, the box material 51 is a cardboard box.

[0047] Box material 51, which is a cardboard box, has a pair of outer flaps 515 and a pair of inner flaps 516 on one side and the other side in the first direction DA. In this case, the outer flaps 515 and the inner flaps 516 are overlapped to form a bottom surface 513 and a top surface 514, thereby closing box material 51. When box material 51 is closed, outer flaps 515 and inner flaps 516 are overlapped such that inner flaps 516 are positioned more inward of box material 51 than outer flaps 515.

[0048] Here, in the packaging body 100, a pair of first module side surfaces 20a of the energy storage element module 20 face a pair of first side surfaces 511 of the box material 51. Also, a pair of second module side surfaces 20b of the energy storage element module 20 face a pair of second side surfaces 512 of the box material 51.

[0049] Next, the pressing member 55 will be described. Fig. 8 is a perspective view showing the energy storage element module 20, device wiring 70, pressing member 55, and holding member 56 included in the exploded view of Fig. 6. The pressing member 55 is a member that sandwiches the energy storage element module 20 between itself and a receiving member 53, which will be described later, in the packaging body 100, to prevent the energy storage element module 20 from moving inside the box material 51.

[0050] 8, the pressing member 55 has a pressing main body portion 55a, a pair of pressing side portions 55b, and a pressing buffer portion 55c. The pressing main body portion 55a is a plate-shaped portion that faces the module top surface 20d of the energy storage element module 20 in the packaging body 100. The pair of pressing side portions 55b are plate-shaped portions that are provided at the end of the pressing main body portion 55a in the second direction DB and extend downward beyond the pressing main body portion 55a. The pair of pressing side portions 55b face parts of the pair of first module side surfaces 20a in the packaging body 100. The pressing main body portion 55a and the pair of pressing side portions 55b are made of, for example, a resin material and are integrally molded.

[0051] The pressing buffer 55c is provided on the upper side of the pressing main body 55a and serves to absorb the impact of the energy storage element module 20 colliding with an upper member when the energy storage element module 20 attempts to move upward inside the box member 51. In the example shown in FIG. 8, the pressing member 55 has a pair of pressing buffers 55c extending in the third direction DC. Each of the pair of pressing buffers 55c has a quadrangular prism shape. The material of the pressing buffers 55c is, for example, the same as the material of the buffer member 52 described below.

[0052] Next, the holding member 56 will be described. The holding member 56 is a member that holds the other end 72 of the device wiring 70 above the energy storage element module 20. In the example shown in Fig. 8, the holding member 56 is provided above the pressing main body 55a. Also, in the example shown in Fig. 8, the device wiring 70 has a connector 72a at the other end 72, and the holding member 56 holds the connector 72a.

[0053] The shape of the holding member 56 is not particularly limited as long as it can hold the other end 72. As an example, the holding member 56 has a recessed portion shaped to correspond to the shape of the other end 72. In this case, the holding member 56 can hold the other end 72 by engaging the other end 72 with the recessed portion. The holding member 56 may be made of a material that sandwiches the other end 72 and cushions shocks transmitted to the other end 72 from the outside. In this case, bubble cushioning material can be used as the material that sandwiches the other end 72 of the holding member 56. Furthermore, the material that sandwiches the other end 72 of the holding member 56 may be fixed to the upper surface of the presser body 55a with, for example, adhesive tape while holding the other end 72.

[0054] By the holding member 56 holding the other end 72, the device wiring 70, particularly the other end 72 of the device wiring 70, can be prevented from moving inside the box material 51 and getting into an undesirable position and being damaged. For example, the other end 72 can be prevented from moving between the energy storage element module 20 and the packaging material 50 and being pinched between the energy storage element module 20 and the packaging material 50 and being damaged. In particular, if the device wiring 70 has a connector 72a at the other end 72, the connector 72a can be prevented from being damaged. Furthermore, by the holding member 56 holding the other end 72 above the energy storage element module 20, the device wiring 70, particularly the energy storage element module 20, is prevented from coming into contact with the energy storage element module 20 such that the energy storage element module 20 rests on the other end 72 of the device wiring 70. This prevents the device wiring 70 from being damaged by the weight of the energy storage element module 20. Furthermore, by the holding member 56 holding the other end 72 above the energy storage element module 20, the lateral dimensions of the box material 51 that houses the energy storage element module 20, the holding member 56 and the device wiring 70, for example the lengths of the first side 51a and second side 51b of the box material 51, can be kept smaller than when the other end 72 is held on the side of the energy storage element module 20.

[0055] 6 to 8, the holding member 56 is provided between a pair of pressing buffers 55c in the second direction DB. This allows the space between the pair of pressing buffers 55c to be used as a space for accommodating the holding member 56 and part of the device wiring 70. This allows the dimensions of the box member 51 that accommodates the holding member 56 and the device wiring 70 to be made smaller.

[0056] Next, the receiving member 53 will be described. Fig. 9 is a perspective view showing the receiving member 53 included in the exploded view of Fig. 6. The receiving member 53 is a member that sandwiches the energy storage element module 20 between itself and the pressing member 55 in the packaging body 100, thereby preventing the energy storage element module 20 from moving inside the box material 51.

[0057] 9, the receiving member 53 has a receiving main body portion 53a, a pair of receiving side portions 53b, and a receiving buffer portion 53c. The receiving main body portion 53a is a plate-shaped portion that faces the module bottom surface 20c of the energy storage element module 20 in the packaging body 100. The pair of receiving side portions 53b are plate-shaped portions that are provided at the ends of the receiving main body portion 53a in the second direction DB and extend upward beyond the receiving main body portion 53a. The pair of receiving side portions 53b face parts of the pair of first module side surfaces 20a in the packaging body 100. The receiving main body portion 53a and the pair of receiving side portions 53b are made of, for example, a resin material and are integrally molded.

[0058] The receiving buffer 53c is provided below the receiving main body 53a and serves to absorb the impact of the energy storage element module 20 colliding with a lower component when the energy storage element module 20 attempts to move downward inside the box member 51. In the example shown in FIG. 9, the receiving member 53 has a pair of receiving buffers 53c extending in the third direction DC. Each of the pair of receiving buffers 53c has a substantially quadrangular prism shape. The material of the receiving buffers 53c is, for example, the same as the material of the buffer member 52 described below.

[0059] As shown in Figure 9, each of the pair of receiving buffer portions 53c has a first bottom surface 53d located at both ends in the third direction DC, and a second bottom surface 53e located between the first bottom surfaces 53d in the third direction DC and lower than the first bottom surfaces 53d.

[0060] The receiving buffer 53c having the first bottom surface 53d and the second bottom surface 53e provides the following effect. As shown in FIG. 7 , the bottom surface 513 of the box material 51, which is a cardboard box, has a portion where the outer flap 515 and the inner flap 516 overlap and a portion where the inner flap 516 does not overlap the outer flap 515. A step 517 is formed between the portion where the outer flap 515 and the inner flaps 516 overlap and the portion where the inner flap 516 does not overlap the outer flap 515. The receiving buffer 53c having the first bottom surface 53d and the second bottom surface 53e allows the first bottom surface 53d to come into contact with the portion where the outer flap 515 and the inner flap 516 overlap, and the second bottom surface 53e to come into contact with the portion where the inner flap 516 does not overlap the outer flap 515. Therefore, regardless of the presence of the step 517, the receiving buffer 53c can be brought into contact with a wide area of ​​the bottom surface 513. This allows the receiving buffer 53c to more stably support the energy storage element module 20 when the energy storage element module 20 is placed on the receiving member 53.

[0061] Next, the cushioning material 52 will be described. FIG. 10 is a perspective view showing the cushioning material 52 included in the exploded view of FIG. 6. Note that the cushioning material 52 is divided into two parts, a first part 524 and a second part 525, by an opening 523 as described below. FIG. 10 shows the first part 524 and the second part 525 arranged in the same arrangement as when the packaging body 100 is formed. The cushioning material 52 is a member that sandwiches the energy storage element module 20 from the sides in the packaging body 100 to prevent the energy storage element module 20 from moving inside the box material 51. The cushioning material 52 can mitigate the impact of the energy storage element module 20 colliding with a side member when the energy storage element module 20 attempts to move laterally inside the box material 51.

[0062] In the example shown in FIG. 7, cushioning material 52 sandwiches receiving member 53 and pressing member 55 together with energy storage element module 20 from the sides.

[0063] As shown in FIG. 10 , the cushioning material 52 has a first wall portion 521 parallel to the first direction DA and the third direction DC, and a second wall portion 522 parallel to the first direction DA and the second direction DB. In the package 100, the first wall portion 521 is interposed between the pair of first side surfaces 511 and the pair of first module side surfaces 20 a. The second wall portion 522 is interposed between the pair of second side surfaces 512 and the pair of second module side surfaces 20 b. The cushioning material 52 according to the first embodiment has a pair of first wall portions 521 that sandwich the energy storage element module 20 from the second direction DB. As shown in FIG. 7 , the cushioning material 52 according to the first embodiment has a pair of second wall portions 522 that sandwich the energy storage element module 20 from the third direction DC.

[0064] In the example shown in FIG. 10, the first wall portion 521 and the second wall portion 522 are connected. As an example, the first wall portion 521 and the second wall portion 522 are integrally molded. The material of the buffer material 52 is, for example, foamed plastic. More specifically, an extruded foam made primarily of polyethylene can be used as the material of the buffer material 52. One example of an extruded foam made primarily of polyethylene is Suntec Foam (registered trademark).

[0065] 10 , the thickness w2 of the second wall portion 522 is greater than the thickness w1 of the first wall portion 521. When the thickness w2 of the second wall portion 522 is greater than the thickness w1 of the first wall portion 521, for example, the thickness w2 of the second wall portion 522 is greater than 1 time and not more than 4 times the thickness w1 of the first wall portion 521. As a more specific example, the thickness w2 of the second wall portion 522 is greater than 1.5 times and not more than 4 times the thickness w1 of the first wall portion 521. Furthermore, although not shown, the thickness w1 of the first wall portion 521 and the thickness w2 of the second wall portion 522 may be equal to each other, or the thickness w2 of the second wall portion 522 may be smaller than the thickness w1 of the first wall portion 521. When the thickness w2 of the second wall portion 522 is smaller than the thickness w1 of the first wall portion 521, the thickness w1 of the first wall portion 521 is, for example, more than one time and not more than four times the thickness w2 of the second wall portion 522.

[0066] The effect of the case where the thickness w2 of the second wall portion 522 is greater than the thickness w1 of the first wall portion 521 will be described. As described above, components provided on the surface of the energy storage element module 20, such as the connection portion 22, are preferably provided on the second module side surface 20b from the viewpoint of allowing adjacent energy storage element modules 20 to be used without interfering with each other when multiple energy storage element modules 20 are stored in the storage box 11. For this reason, components provided on the surface of the energy storage element module 20, such as the connection portion 22, may be concentrated on the second module side surface 20b. In this case, by making the thickness w2 of the second wall portion 522 greater than the thickness w1 of the first wall portion 521, the effect of the buffer material 52 in absorbing impact on the components provided on the second module side surface 20b can be enhanced. In particular, when the connection portion 22 is provided on the second module side surface 20b, impact on the connection portion 22 can be more effectively absorbed. Furthermore, by reducing the thickness w1 of the first wall portion 521, the length of the second side 51b of the box material 51 that houses the cushioning material 52 can be kept short.

[0067] An opening 523 is formed in the second wall portion 522. In the example shown in Fig. 10, an opening 523 is formed in each of the pair of second wall portions 522. In the example shown in Fig. 10, the opening 523 is formed from one end to the other end of the second wall portion 522 in the first direction DA. For this reason, the cushioning material 52 is divided into a first portion 524 and a second portion 525 by the opening 523. In other words, in the cushioning material 52 divided into the first portion 524 and the second portion 525 shown in Fig. 10, the opening 523 refers to the gap between the first portion 524 and the second portion 525.

[0068] By providing the opening 523 in the second wall portion 522, when opening the box material 51 and removing the energy storage element module 20 by hand, the user can insert his / her hand into the opening 523 and grasp the energy storage element module 20. This makes it easy to remove the energy storage element module 20 from the box material 51.

[0069] Furthermore, by providing the opening 523 in the second wall portion 522, it is possible to reduce the amount of material required to form the second wall portion 522. In particular, when the thickness w2 of the second wall portion 522 is made larger than the thickness w1 of the first wall portion 521, by providing the opening 523 in the second wall portion 522, it is possible to more effectively reduce the amount of material required to form the second wall portion 522 while increasing the thickness w2 of the second wall portion 522.

[0070] Furthermore, by providing the opening 523 in the second wall portion 522, it is believed that the impact transmitted from the cushioning material 52 to the portion of the second module side surface 20b facing the opening 523 is reduced. This reduces the impact transmitted to the components provided in that portion of the second module side surface 20b. Furthermore, when a component that protrudes outward is provided on the second module side surface 20b, the component can also be accommodated in the opening 523.

[0071] In the first embodiment, the connection portion 22 is provided in a portion of the second module side surface 20b that faces the opening 523. In this case, the opening 523 can further reduce the impact transmitted from the cushioning material 52 to the connection portion 22. Furthermore, even if the connection portion 22 has a shape that protrudes outward from the second module side surface 20b, the connection portion 22 can be accommodated in the opening 523.

[0072] The packaging body 100 according to the first embodiment packages the device wiring 70, which is connected at one end 71 to the connection portion 22, together with the energy storage element module 20. In this case, the connection portion 22 is provided on a portion of the second module side surface 20b facing the opening 523, so that at least a portion of the device wiring 70 connected to the connection portion 22 can be accommodated in the opening 523. In the example shown in FIG. 7 , the device wiring 70 is connected at one end 71 to the connection portion 22 and extends above the energy storage element module 20 through the opening 523, which widens to the upper end of the second wall portion 522. As described above, the other end 72 of the device wiring 70 is held by the holding member 56 above the energy storage element module 20.

[0073] As an example, the thickness of one of the pair of second wall portions 522 is the same as the thickness of the other of the pair of second wall portions 522. Note that one of the pair of second wall portions 522 may be thicker than the other of the pair of second wall portions 522. In this case, one of the pair of second module side surfaces 20b facing the second wall portion 522 having the greater thickness can be more effectively protected from impact than the other of the pair of second module side surfaces 20b. Furthermore, by reducing the thickness of the other of the pair of second wall portions 522, the length of the first side 51a of the box material 51 that houses the buffer material 52 can be reduced. As an example, consider a case where a connecting portion 22 is provided on one of the pair of second module side surfaces 20b and a connecting portion 22 is not provided on the other of the pair of second module side surfaces 20b. In this case, the thickness of the second wall portion 522 facing the second module side surface 20b on which the connecting portion 22 is provided may be thicker than the thickness of the second wall portion 522 facing the second module side surface 20b on which the connecting portion 22 is not provided. This makes it possible to more effectively protect the connection portion 22 from impacts and to keep the length of the first side 51a of the box material 51 small.

[0074] The top pad 57 is a plate-shaped member that protects the energy storage element module 20, the device wiring 70, and the like from impacts from above. The top pad 57 is placed on the pressing member 55 from above. The material and thickness of the top pad 57 are not particularly limited as long as the top pad 57 has a degree of rigidity that contributes to protecting the energy storage element module 20, the device wiring 70, and the like. The top pad 57 has a rigidity greater than that of the box material 51, for example.

[0075] Resin bag 54 is a bag that accommodates energy storage element module 20, device wiring 70, pressing member 55, and holding member 56. In the example shown in Fig. 6, resin bag 54 is a square-bottom bag that has a rectangular bag bottom 541 and a tubular bag side 542 that is connected to the outer periphery of bag bottom 541 at one end.

[0076] 7 , in the first embodiment, the resin bag 54 accommodates the energy storage element module 20, the device wiring 70, the pressing member 55, and the holding member 56, with the energy storage element module 20 positioned on the bag bottom 541 side. The resin bag 54 is placed on the receiving body 53a of the receiving member 53 with the energy storage element module 20, the device wiring 70, the pressing member 55, and the holding member 56 accommodated therein. In the example shown in FIG. 7 , the resin bag 54 is sandwiched between the receiving body 53a of the receiving member 53 and the top pad 57.

[0077] 7, a part of the bag side portion 542 of the resin bag 54 is deformed to fit the shape of the device wiring 70. As a result, the part of the bag side portion 542 of the resin bag 54 is accommodated in the opening 523, similar to the part of the device wiring 70.

[0078] The resin bag 54 is made of, for example, a thin polyethylene film or a thin polypropylene film.

[0079] 1, the packaging material 50 includes tape 58. When the outer flaps 515 and inner flaps 516 of the box material 51, which is a cardboard box, are overlapped to form the bottom surface 513 and the top surface 514, the tape 58 is attached to the outer flaps 515 and inner flaps 516 to fix the positional relationship between the outer flaps 515 and inner flaps 516. The tape 58 is, for example, packing tape.

[0080] The package 100 according to the first embodiment is formed, for example, by the following procedure. First, one end 71 of the device wiring 70 is connected to the connection portion 22 of the energy storage element module 20. Next, the pressing member 55, which has the holding member 56 provided thereon, is placed over the energy storage element module 20 from above. Next, the other end 72 of the device wiring 70 is held by the holding member 56 provided on the pressing member 55. Next, the energy storage element module 20, the device wiring 70, the pressing member 55, and the holding member 56 are housed in a resin bag 54. Next, the top pad 57 is placed over the pressing member 55 from above. Next, the receiving member 53 is placed over the energy storage element module 20 from below. In the first embodiment, after the energy storage element module 20 is housed in the resin bag 54 as described above, the receiving main body portion 53a of the receiving member 53 is placed over the bag bottom portion 541 of the resin bag 54 from below, thereby placing the receiving member 53 over the energy storage element module 20 from below. Next, cushioning material 52 is placed on the side of energy storage element module 20 so that first wall portion 521 faces first module side surface 20a and second wall portion 522 faces second module side surface 20b. Finally, the integrated product formed by the above procedure is housed in box material 51, outer flaps 515 and inner flaps 516 are overlapped to form bottom surface 513 and top surface 514, and box material 51 is closed. In this way, package 100 shown in FIG. 1 is formed.

[0081] The development process of the package 100 according to the first embodiment will be described. When transporting an energy storage element unit 10 for indoor installation such as that shown in FIG. 2 for installation inside a building, it is sometimes difficult to transport the unit as a whole due to its excessive size and weight. For this reason, the present inventors have considered a method of transporting the energy storage element unit 10 into a building in parts and then assembling the energy storage element unit 10 inside the building. They have then considered a package 100 that is easy to transport, particularly when transporting the energy storage element module 20, one of the parts of the energy storage element unit 10.

[0082] As a result of their investigation, the present inventors have taken into consideration that the width of the entrance door and the width of the staircase in buildings, particularly in ordinary houses, are greater than 750 mm, and have found the dimensions of the box material 51 that make it particularly easy to transport the package 100. As a result of the above, the present inventors have completed the present invention.

[0083] Next, a description will be given of the dimensions of the box material 51 that facilitate the transportation of the package 100. In the package 100 according to the first embodiment, the length w4 of the second side 51b of the box material 51 is 750 mm or less. This provides the following effects.

[0084] It is thought that a person transporting package 100 will usually lift package 100 with bottom surface 513 of box material 51 positioned downward. Here, by setting length w4 of second side 51b to 750 mm or less, the person transporting package 100 can pass through the front door or stairs of a typical house, which are usually wider than 750 mm, while keeping bottom surface 513 of box material 51 positioned downward.

[0085] In the package 100 according to the first embodiment, the length w3 of the first side 51a of the box material 51 is 750 mm or less. The sum of the length w3 of the first side 51a of the box material 51, the length w4 of the second side 51b, and the length w5 of the third side 51c is 1200 mm or less. This provides the following advantages.

[0086] A person carrying the package 100 typically lifts the package 100 with the bottom surface 513 of the box material 51 positioned downward and the direction in which the first side 51a extends parallel to the left-right direction of the person carrying it. Here, since the length w3 of the first side 51a is 750 mm or less, the person carrying the package 100 can pass through the front door or stairs of a typical home, which are typically wider than 750 mm, without having to turn their body or the package 100. Furthermore, since the sum of the length w3 of the first side 51a, the length w4 of the second side 51b, and the length w5 of the third side 51c is 1200 mm or less, the person carrying the package 100 can easily carry it by holding it in their arms. This makes it easier for the person carrying the package 100 to carry it.

[0087] Furthermore, by configuring the packaging body 100 as described above, it is possible to use a box material 51 that satisfies the above dimensions and to house the energy storage element module 20 in the box material 51 in a manner that the energy storage element module 20 is adequately protected from impact. In particular, even if the dimension w6 of the energy storage element module 20 in the direction in which the first side 51a extends (third direction DC in FIG. 3 ) is large, it is possible to house the energy storage element module 20 in the box material 51 in a manner that the energy storage element module 20 is adequately protected from impact. As an example, the length w3 of the first side 51a is 1.05 to 1.3 times the dimension w6 of the energy storage element module 20 in the direction in which the first side 51a extends (third direction DC in FIG. 3 ). Furthermore, even if the dimension w7 of the energy storage element module 20 in the direction in which the second side 51b extends (second direction DB in FIG. 3) is large, the energy storage element module 20 can be housed in the box member 51 in a manner that sufficiently protects the energy storage element module 20 from impact. As an example, the length w4 of the second side 51b is 1.05 to 1.5 times the dimension w7 of the energy storage element module 20 in the direction in which the second side 51b extends (second direction DB in FIG. 3).

[0088] In particular, when the energy storage element unit 10 has a large capacity, the dimensions and weight of the energy storage element unit 10 become particularly large, and therefore it becomes increasingly necessary to transport the energy storage element unit 10 in parts. Furthermore, the dimensions and weight of each energy storage element module 20 mounted on the energy storage element unit 10 also become large, and therefore it becomes increasingly necessary to form a package 100 that is easy to transport. For this reason, it is considered that the present invention is particularly effective when applied to energy storage element modules 20 mounted on a large-capacity energy storage element unit 10. A large-capacity energy storage element unit 10 refers to an energy storage element unit 10 with a capacity of, for example, 6 kWh (kilowatt hours) or more and 24 kWh or less.

[0089] (Second embodiment) Next, a second embodiment of the present disclosure will be described. Fig. 11 is a perspective view showing a control module packaging body 200 according to the second embodiment. The control module packaging body 200 according to the second embodiment packages a control module 14 to be mounted on the energy storage element unit 10 as shown in Fig. 2 described above in the first embodiment. The control module packaging body 200 includes the control module 14 and a control module packaging material 250 that packages the control module 14. As shown in Fig. 11, the control module packaging material 250 includes a control module box material 251. As will be described later, the control module box material 251 packages one control module 14.

[0090] Figure 12 is an exploded view of the control module packaging body 200 shown in Figure 11, showing each of the components that make up the control module packaging material 250 and the control module 14. As shown in Figure 12, the control module packaging body 200 includes, as the control module packaging material 250, a control module box material 251, a control module pressing member 255, a control module receiving member 253, and a control module resin bag 254.

[0091] The control module box material 251 will now be described. When the control module box material 251 is closed as shown in Fig. 11, the control module box material 251 has a rectangular parallelepiped shape having a first side 251a, a second side 251b that forms the bottom surface 213 of the control module box material 251 together with the first side 251a and is shorter than the first side 251a, and a third side 251c that is perpendicular to the bottom surface 213 of the control module box material 251. The explanation given for the box material 51 in the first embodiment can also be applied to the control module box material 251 unless it is inconsistent.

[0092] Next, the control module retainer 255 will be described. The control module retainer 255 has a plate-shaped control module retainer main body 255a and a control module retainer buffer 255b provided on a portion of one surface of the control module retainer main body 255a and a portion of the other surface of the control module retainer main body 255a. The control module retainer main body 255a is made of, for example, a resin material. The material of the control module retainer buffer 255b is the same as the material of the buffer material 52 described above in the first embodiment, for example.

[0093] Next, the control module receiving member 253 will be described. The control module receiving member 253 has a plate-shaped control module receiving main body 253a and a control module receiving buffer 253b provided on a portion of one surface of the control module receiving main body 253a and on a portion of the other surface of the control module receiving main body 253a. The control module receiving main body 253a is made of, for example, a resin material. The material of the control module receiving buffer 253b is, for example, the same as the material of the buffer material 52 described above in the first embodiment.

[0094] In the control module packaging body 200, the control module pressing member 255 is located above the control module 14. The control module receiving member 253 is located below the control module 14. In the control module packaging body 200, the control module pressing member 255 and the control module receiving member 253 sandwich the control module 14, preventing the control module 14 from moving inside the control module box material 251.

[0095] In the control module packaging body 200, the control module pressing buffer 255b of the control module pressing member 255 is located above the control module 14. Therefore, when the control module 14 attempts to move upward inside the control module box material 251, the control module pressing buffer 255b reduces the impact of the control module 14 colliding with an upper component. In addition, the control module receiving buffer 253b of the control module receiving member 253 is located below the control module 14. Therefore, when the control module 14 attempts to move downward inside the control module box material 251, the control module receiving buffer 253b reduces the impact of the control module 14 colliding with a lower component.

[0096] Next, the control module resin bag 254 will be described. The control module resin bag 254 is a bag that houses the control module 14. The control module resin bag 254 may house a control module pressing member 255 together with the control module 14. The explanation given for the resin bag 54 in the first embodiment can also be applied to the control module resin bag 254, unless contradictory.

[0097] 11, the packaging material 50 includes a tape 258. The explanation given about the tape 58 in the first embodiment can also be applied to the tape 258 unless it is inconsistent.

[0098] The control module packaging 200 according to the second embodiment is formed, for example, by the following procedure. First, the control module 14 is housed in the control module resin bag 254. Next, the control module pressing member 255 is placed on the control module 14 from above. Next, the control module receiving member 253 is placed on the control module 14 from below. Finally, the integrated product formed in the above procedure is housed in the control module box material 251, and the flaps of the control module box material 251 are placed on top of each other to form the bottom surface 213 and top surface 214, and the control module box material 251 is closed. This forms the control module packaging 200 shown in FIG. 11.

[0099] As described above, the description of the box material 51 in the first embodiment can also be applied to the control module box material 251, unless there are contradictions. For example, the length w8 of the first side 251a of the control module box material 251 is 750 mm or less. Furthermore, the sum of the length w8 of the first side 251a, the length w9 of the second side 251b, and the length w10 of the third side 251c of the control module box material 251 is 1200 mm or less. This provides the same effect as when the length w3 of the first side 51a of the box material 51 is 750 mm or less and the sum of the length w3 of the first side 51a, the length w4 of the second side 51b, and the length w5 of the third side 51c of the box material 51 is 1200 mm or less in the first embodiment.

[0100] (Third embodiment) Next, a third embodiment of the present disclosure will be described. Fig. 13 is a perspective view showing a storage box package 300 according to the third embodiment. The storage box package 300 according to the third embodiment is formed by packaging a storage box 11 used for an energy storage element unit 10 as shown in Fig. 2 described above in the first embodiment. The storage box package 300 includes the storage box 11 and a storage box packaging material 350 that packages the storage box 11. As shown in Fig. 13, the storage box packaging material 350 includes a storage box material 351. As will be described later, the storage box material 351 packages the storage box 11.

[0101] First, the storage box 11 will be described. FIG. 14 is a perspective view of the energy storage element unit 10 using the storage box 11 packed in the storage box material 351, including parts not shown in FIG. 2. As shown in FIG. 2, 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 energy storage element modules 20. As described above in the first embodiment, the storage box 11 has a substantially rectangular parallelepiped shape. Also, as shown in FIG. 2, the storage box 11 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 13 located on one side in the first direction DA (the lower side in FIG. 14). The upper wall portion 13b is a substantially rectangular, plate-shaped wall portion 13 facing the bottom wall portion 13a in the first direction DA. The bottom wall portion 13a and the top 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 perpendicular to the third direction DC. The side wall portion 13c is a wall portion 13 whose edges connect to the edges of the bottom wall portion 13a. In the example shown in FIG. 14, the four side wall portions 13c are each a substantially rectangular, plate-like wall portion 13 whose edges connect to an edge located on one side of the bottom wall portion 13a and an edge located on one side of the top wall portion 13b. The side wall portions 13c are perpendicular to the bottom wall portion 13a. In the example shown in FIG. 14, the four side wall portions 13c are perpendicular to the bottom wall portion 13a and the top wall portion 13b.

[0102] The energy storage element unit 10 shown in FIG. 14 includes a storage box 11 and a decorative panel 19 that is provided in the storage box 11 and covers one of the side wall portions 13c. The decorative panel 19 protects the one side wall portion 13c and the components provided on the one side wall portion 13c. The decorative panel 19 shown in FIG. 14 includes a decorative panel main body portion 19a, a decorative panel first side portion 19b, a decorative panel second side portion 19c, and a decorative panel upper portion 19d. The decorative panel main body portion 19a is a generally plate-shaped portion that is parallel to the side wall portion 13c that is covered by the decorative panel 19. The decorative panel first side portion 19b is a portion that connects the decorative panel main body portion 19a to one of the two side wall portions 13c that are connected to the side wall portion 13c that is covered by the decorative panel 19. The decorative panel second side portion 19c is a portion that connects the other of the two side wall portions 13c that are connected to the side wall portion 13c covered by the decorative panel 19 to the decorative panel main body portion 19a. The decorative panel upper portion 19d is a portion that connects the upper wall portion 13b to the decorative panel main body portion 19a. The decorative panel 19 is attached so as to be removable from the storage box 11. The decorative panel 19 is configured so as to be separable into the decorative panel main body portion 19a, the decorative panel first side portion 19b, the decorative panel second side portion 19c, and the decorative panel upper portion 19d.

[0103] Next, a detailed description will be given of the storage box package 300 that packages the above-mentioned storage box 11. As an example, the storage box package 300 is formed by packaging the above-mentioned storage box 11, as well as the above-mentioned decorative panel main body 19a, decorative panel first side 19b, decorative panel second side 19c, and decorative panel upper portion 19d.

[0104] Fig. 15 is an exploded view of the storage box package 300 shown in Fig. 13, showing the storage box 11, the decorative panel main body 19a, the decorative panel first side 19b, the decorative panel second side 19c, and the decorative panel upper part 19d, as well as each of the components that make up the storage box packaging material 350. As shown in Fig. 15, the storage box package 300 includes, as the storage box packaging material 350, a storage box material 351, a storage box bag 354, a decorative panel tray 355, a decorative panel box material 356, and a buffer block 357.

[0105] The following describes storage box material 351. When storage box material 351 is closed as shown in Fig. 13, storage box material 351 has a rectangular parallelepiped shape having a first side 351a, a second side 351b that forms bottom surface 313 of storage box material 351 together with first side 351a and is shorter than first side 351a, and a third side 351c that is perpendicular to bottom surface 313 of storage box material 351.

[0106] The storage box material 351 includes a storage box main body 352 and a storage box tray 353. The storage box main body 352 is a member that forms the top and side surfaces of the storage box material 351 when closed. In the example shown in FIG. 15 , the storage box main body 352 includes a side surface portion 352a that forms the side surface of the storage box material 351 when closed, and a flap 352b that is provided above the side surface portion 352a and forms the top surface of the storage box material 351 when closed. Note that no flap is provided below the side surface portion 352a. Therefore, the storage box main body 352 is open downward. Specifically, the storage box main body 352 is a cardboard box that has a flap on the top side but no flap on the bottom side. The storage box tray 353 is a member that forms the bottom surface 313 of the storage box material 351 when closed. In the example shown in Figure 15, the storage box tray 353 has a bottom surface portion 353a that forms the bottom surface 313 of the storage box material 351 in the closed state, and a side surface portion 353b that rises upward from the bottom surface portion 353a.

[0107] Next, we will explain the buffer block 357. The buffer block 357 is arranged between the storage box material 351 and the storage box 11 in the storage box packaging body 300, and absorbs the impact transmitted from the outside of the storage box packaging body 300 to the storage box 11 via the storage box material 351.

[0108] In the example shown in FIG. 15, the storage box packaging material 350 has multiple buffer blocks 357. Each of the multiple buffer blocks 357 has a first plate-shaped portion 357a, a second plate-shaped portion 357b perpendicularly connected to the first plate-shaped portion 357a, and a third plate-shaped portion 357c perpendicularly connected to the first plate-shaped portion 357a and the second plate-shaped portion 357b. Each of the buffer blocks 357 is arranged to cover a corresponding corner 11a of the storage box 11. In the example shown in FIG. 15, the storage box packaging material 350 has eight buffer blocks 357. In the storage box packaging body 300, the eight buffer blocks 357 are arranged between the storage box material 351 and each of the eight corners 11a of the storage box 11, which has a substantially rectangular parallelepiped shape. The material of the buffer blocks 357 is, for example, the same as the material of the buffer material 52 described above in the first embodiment.

[0109] Next, the storage box bag 354 will be described. The storage box bag 354 is a bag that contains the storage box 11. Note that in Fig. 15, the specific shape of the storage box bag 354 is not shown, and only the general shape of the storage box bag 354 is shown by dashed lines. The storage box bag 354 is, for example, a gusset bag made of resin.

[0110] Next, the decorative panel box material 356 will be described. The decorative panel box material 356 is a box that houses the decorative panel main body 19a, the decorative panel first side portion 19b, the decorative panel second side portion 19c, and the decorative panel upper portion 19d, and is housed in the storage box material 351. Specifically, the decorative panel box material 356 is a cardboard box. As shown in FIG. 15 , the decorative panel first side portion 19b and the decorative panel second side portion 19c may be stacked and bundled in the thickness direction and then housed in the decorative panel box material 356. In the storage box package 300, the decorative panel box material 356 is housed on the upper side of the storage box 11.

[0111] Next, the decorative panel tray 355 will be described. The decorative panel tray 355 is a member that divides the interior of the storage box material 351 into a space in which the storage box 11 is housed and a space in which the decorative panel box material 356 is housed. When the storage box package 300 is formed, the decorative panel tray 355 has a bottom surface portion 355a that contacts the bottom surface of the decorative panel box material 356 on the upper side, and a side surface portion 355b that rises upward from the bottom surface portion 355a. Furthermore, when the storage box package 300 is formed, the bottom surface portion 355a of the decorative panel tray 355 contacts, on the lower side, a buffer block 357 that covers the upper corner portion 11a of the storage box 11.

[0112] 14, the storage box package 300 also includes a band 358. In the storage box package 300, the band 358 secures the storage box material main body 352 and the storage box tray 353 to each other. The band 358 also secures the flap 352b of the storage box material main body 352 in an overlapping state. Due to the band 358, the storage box material 351 in the storage box package 300 remains closed. As an example, the band 358 is a so-called PP band, that is, a band made of polypropylene.

[0113] Although not shown, the storage box package 300 may further include screws and the like used to form the energy storage element unit 10. For example, the screws used to secure the decorative panel main body 19a, the decorative panel first side 19b, the decorative panel second side 19c, and the decorative panel upper portion 19d to one another may be housed in the storage box material 351. In the storage box package 300, the screws may be located inside the storage box 11 or inside the decorative panel box material 356.

[0114] The storage box package 300 according to the third embodiment is formed, for example, by the following procedure. First, a plurality of buffer blocks 357 are arranged on the storage box 11 so as to cover each of the corners 11a of the storage box 11. Then, a storage box material main body 352 and a storage box tray 353 are combined to form a storage box material 351, and the storage box 11 and the plurality of buffer blocks 357 are housed in the storage box material 351. Then, the decorative panel main body 19a, the decorative panel first side portion 19b, the decorative panel second side portion 19c, and the decorative panel upper portion 19d are housed in a decorative panel box material 356, and the flaps of the decorative panel box material 356 are overlapped to close the decorative panel box material 356. Next, the decorative panel tray 355 and the closed decorative panel box material 356 are inserted in this order from above the storage box material 351 containing the storage box 11 and multiple buffer blocks 357, and the decorative panel tray 355 and the decorative panel box material 356 are placed in the storage box material 351. Next, the flaps 352b of the storage box material main body 352 are overlapped to close the storage box material 351. Finally, the storage box material main body 352 and the storage box tray 353 are fixed to each other using bands 358, and the flaps 352b of the storage box material main body 352 are fixed in the overlapped state. This forms the storage box package 300 shown in FIG. 13.

[0115] As described above, the explanation given for box material 51 in the first embodiment can also be applied to storage box material 351, unless there is a contradiction. For example, length w11 of second side 351b of storage box material 351 is 750 mm or less. This provides the same effect as when length w4 of second side 51b of box material 51 in the first embodiment is set to 750 mm or less. In other words, by setting length w11 of second side 351b to 750 mm or less, a conveyer can pass through the front door and stairs of a typical home, which are usually wider than 750 mm, while keeping bottom surface 313 of storage box material 351 positioned downward.

[0116] The aspects of the present invention are not limited to the above-described embodiments, but include various modifications that may be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-described contents. In other words, various additions, modifications, and partial deletions are possible within the scope of the conceptual idea and spirit of the present invention that can be derived from the contents defined in the claims and their equivalents. [Explanation of symbols]

[0117] 10. Energy storage element unit 11 Storage Box 14 Control Module 15 Energy storage element module assembly 18 cases 20 Energy storage element module 20a Side of the first module 20b Second module side 20c Module bottom 20d Module top 21 End cover 22 Connection 22a opening 30 cells 40 Case body 50 Packaging materials 51 Box material 51a Side 1 51b Side 2 51c Third side 511 1st side 512 Second side 513 bottom 514 Top surface 52 Cushioning material 521 1st wall section 522 2nd wall section 523 Opening 56 Retaining member 60 Cover 70 Equipment wiring 71 one end 72 other end 100 packages 200 Control module packaging 300 Storage box packaging

Claims

1. A package that packages one energy storage element module out of a plurality of energy storage element modules mounted in an energy storage element unit for indoor installation, the one energy storage element module; a box material in which the energy storage element module is packed, the box member has a rectangular parallelepiped shape having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface; The first side has a length of 750 mm or less, The total length of the first side, the second side, and the third side is 1200 mm or less, the energy storage element module has a pair of first module side surfaces facing a pair of first side surfaces formed by the first side and the third side of the box material, and a pair of second module side surfaces facing a pair of second side surfaces formed by the second side and the third side of the box material, a buffer material having a first wall portion interposed between the pair of first side surfaces and the pair of first module side surfaces, and a second wall portion interposed between the pair of second side surfaces and the pair of second module side surfaces, An opening is formed in the second wall portion, The energy storage element module has a connection portion, to which wiring can be connected, provided on a portion of the second module side surface facing the opening.

2. The package according to claim 1 , wherein the length of the first side is 1.05 to 1.3 times the dimension of the energy storage element module in the direction in which the first side extends.

3. The package of claim 1 , wherein the second wall portion has a thickness greater than a thickness of the first wall portion.

4. a device wiring that is connected at one end to the connection portion and is packed in the box together with the energy storage element module; The package according to claim 1 , further comprising: a holding member that holds the other end of the device wiring above the energy storage element module.

5. A packaging material for packaging one energy storage element module among a plurality of energy storage element modules mounted in an energy storage element unit for indoor installation, comprising: the packaging material includes a box material having a rectangular parallelepiped shape with a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface; The first side has a length of 750 mm or less, The total length of the first side, the second side, and the third side is 1200 mm or less, the energy storage element module has a pair of first module side surfaces facing a pair of first side surfaces formed by the first side and the third side of the box material, and a pair of second module side surfaces facing a pair of second side surfaces formed by the second side and the third side of the box material, a buffer material having a first wall portion interposed between the pair of first side surfaces and the pair of first module side surfaces, and a second wall portion interposed between the pair of second side surfaces and the pair of second module side surfaces, An opening is formed in the second wall portion, The energy storage element module has a connection portion, to which wiring can be connected, provided on a portion of the second module side surface facing the opening.

6. The packaging material according to claim 5 , wherein the length of the first side is 1.05 to 1.3 times the dimension of the energy storage element module in the direction in which the first side extends.

7. A storage box package used for an indoor installation energy storage element unit, the storage box having a bottom wall, an upper wall, and four side walls, The storage box; a decorative panel provided in the storage box and covering one of the side wall portions, the decorative panel having: a decorative panel main body portion; a decorative panel first side portion connecting one of the two side wall portions connected to the side wall portion covered by the decorative panel to the decorative panel main body portion; a decorative panel second side portion connecting the other of the two side wall portions connected to the side wall portion covered by the decorative panel to the decorative panel main body portion; and a decorative panel upper portion connecting the upper wall portion to the decorative panel main body portion; A storage box material in which the storage box is packed; a decorative panel box material that accommodates the decorative panel main body portion, the decorative panel first side portion, the decorative panel second side portion, and the decorative panel upper portion, and is accommodated in the storage box material; The storage box material has a rectangular parallelepiped shape having a first side, a second side that forms a bottom surface together with the first side and is shorter than the first side, and a third side that is perpendicular to the bottom surface, The second side has a length of 750 mm or less, The decorative panel box material is accommodated on the upper side of the storage box inside the storage box material so that the thickness direction of the decorative panel main body, the thickness direction of the decorative panel first side, the thickness direction of the decorative panel second side, the thickness direction of the upper part of the decorative panel, and the thickness direction of the bottom surface of the storage box material are all facing in the same direction, forming a storage box packaging body.

8. The storage box package according to claim 7 , wherein the length of the second side is 1.05 to 1.3 times the dimension of the storage box in the direction in which the second side extends.

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