Building material, method for manufacturing building material, and foundation structure having building material

Abstract

To provide building materials that can suppress the deterioration of storage batteries and the decline in charge-discharge efficiency while securing a storage space for storage batteries, a method for manufacturing building materials, and foundation structures having building materials.SOLUTION: In a building material, a building body (10) composed of wood extending in a predetermined direction, a storage battery (20) capable of charging and discharging, and a cooling device (30) for cooling the storage battery are provided. A housing hole (11) is formed in the building body, extending along its longitudinal direction and opening on at least one end face of the longitudinal direction, and the storage battery is housed inside the housing hole. In the cooling device, a main body (31) that extends along the longitudinal direction of the building material body and is arranged in contact with the storage battery inside the housing hole, and a heat dissipation section (32) that is in thermal contact with the main body and is exposed outside the housing hole at the end face of the building material body where the housing hole opens.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to building materials, a method for manufacturing building materials, and a foundation structure including the building materials.

Background Art

[0002] Conventionally, in order to supply power to electrical equipment existing inside or around a building from a power source different from the commercial power supply, it has been considered to install a rechargeable battery in the building.

[0003] For example, Patent Document 1 discloses a building in which a storage battery is installed, and the storage battery is fixed to a channel steel, an I-beam, or an H-beam constituting a beam of the building by bolts or the like. Specifically, in this building, the storage battery is housed in a space formed by the web and flange of the steel material and fixed to the steel material, thereby expanding the storage space for the storage battery.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The temperature of the steel material used for the beam of a building is easily affected by the outside air temperature. Therefore, in the structure of Patent Document 1 described above, there is a problem that the performance of the storage battery is difficult to be stabilized. Specifically, in the above structure, as the outside air temperature rises, the temperature of the steel material rises, and as a result, the temperature of the storage battery rises accordingly, and there is a risk that the deterioration of the storage battery progresses. Further, in the above structure, as the outside air temperature decreases, the temperature of the steel material decreases, and as a result, the temperature of the storage battery decreases accordingly, and there is a risk that the charge / discharge efficiency of the storage battery decreases.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a building material, a method for manufacturing the building material, and a foundation structure including the building material that can suppress deterioration of a storage battery and a decrease in charge / discharge efficiency while securing a storage space for the storage battery.

Means for Solving the Problems

[0007] As a means for solving the above problems, the present invention includes a building material body made of wood extending in a predetermined direction, a rechargeable storage battery, and a cooling device for cooling the storage battery. In the building material body, a storage hole extending along the longitudinal direction thereof and opening at one end in the longitudinal direction is formed. The storage battery is housed inside the storage hole, and the cooling device has a main body portion extending along the longitudinal direction of the building material body and disposed in contact with the storage battery inside the storage hole, and a heat radiating portion that is in thermal contact with the main body portion and exposed to the outside of the storage hole at an end surface of the building material body where the storage hole opens.

[0008] According to the present invention, the building material body can be used as a material constituting a part of a building and also as a container for housing a storage battery. Therefore, it is not necessary to separately secure a space and a device for housing the storage battery in the building.

[0009] Moreover, in the present invention, the storage battery is housed in a storage hole formed in a building material body made of wood having high heat insulation properties. Therefore, the influence of changes in the ambient temperature of the building material body, such as the outside air temperature, on the storage battery can be significantly suppressed. In addition, due to the provision of the cooling device configured as described above, the heat generated from the storage battery can be appropriately released to the outside of the storage hole. That is, it is possible to prevent the storage battery from becoming high temperature due to the heat generated by itself while suppressing the influence of the above temperature change on the storage battery by the surrounding wood. Therefore, according to the present invention, it is possible to prevent the temperature of the storage battery from becoming excessively high and suppress the progress of its deterioration, and also suppress the deterioration of the charge / discharge efficiency due to the temperature of the storage battery becoming excessively low.

[0010] In the above configuration, preferably, the accommodation hole is formed in the center of the building material body and opens at both end faces in the longitudinal direction of the building material body, and its inner diameter is set to a dimension of 50% or less of the outer diameter of the building material body.

[0011] According to this configuration, it becomes possible to release heat to the outside from both ends of the accommodation hole in the longitudinal direction of the building material body, further suppressing the temperature rise of the storage battery. In addition, since the accommodation hole is formed in the center of the building material body and its inner diameter is kept small, while surrounding the storage battery with a thick piece of wood and reliably suppressing the influence of the outside air temperature and the like on the storage battery, the strength of the building material body can be ensured.

[0012] In the above configuration, preferably, the storage battery is an alkaline aqueous battery in which an alkaline aqueous solution is used as an electrolyte.

[0013] According to this configuration, since water is used in the electrolyte, ignition of the storage battery can be suppressed and safety can be enhanced. Further, when an alkaline aqueous battery is used as the storage battery, it is known that a storage battery that is highly resistant to overcharging and over-discharging and is less likely to deteriorate can be realized. Therefore, according to this configuration, the progress of deterioration of the storage battery can be further suppressed.

[0014] In the above configuration, preferably, in the accommodation hole, a storage battery group composed of a plurality of the storage batteries arranged in the longitudinal direction of the building material body and electrically connected in series to each other is accommodated in a state of being electrically connected in parallel to each other.

[0015] According to this configuration, a plurality of storage batteries can be built into the building material body by utilizing the shape extending in the longitudinal direction of the accommodation hole of the building material body. In addition, by connecting a plurality of storage batteries in series electrically, a high voltage can be realized. Furthermore, since a storage battery group composed of a plurality of storage batteries is electrically connected in parallel, even if some of the storage batteries fail, a storage battery group different from the storage battery group including this can be operated to maintain charging and discharging of the storage battery.

[0016] In the above configuration, preferably, the building material body is impregnated with a preservative at least on its outer peripheral portion and the peripheral portion of the accommodation hole.

[0017] According to this configuration, since the outer peripheral portion of the building material body and the peripheral portion of the accommodation hole of the building material body, which is the inner portion of the building material body, are impregnated with a preservative, the progress of the decay of the building material body can be surely suppressed. In particular, when the building material according to the present invention is used for a building installed outdoors, its decay can be effectively prevented and the life of the building material can be extended.

[0018] In the above configuration, preferably, the building material body is buried in the ground as a building material constituting a foundation for supporting a building on the ground, and the main body portions of the storage battery and the cooling device are also buried in the ground.

[0019] According to this configuration, it is not necessary to secure a storage space for the storage battery on the ground, and it becomes possible to more effectively utilize the space on the ground. In addition, the temperature change in the ground is smaller than that on the ground. Therefore, the deterioration of the storage battery can be further suppressed and its performance can be made more stable.

[0020] In the above configuration, preferably, a plurality of the storage batteries arranged along the circumferential direction of the accommodation hole are provided, and the main body portion of the cooling device is arranged in a state of being in contact with each of the storage batteries at a position surrounded by the plurality of storage batteries.

[0021] According to this configuration, a plurality of storage batteries can be accommodated in the accommodation hole in a state of being in contact with the main body portion of the cooling device.

[0022] In the above configuration, preferably, the cooling device includes a plurality of the main body portions arranged along the circumferential direction of the accommodation hole, and the storage battery is arranged in a state of being in contact with each of the main body portions at a position surrounded by the plurality of main body portions.

[0023] According to this configuration, most of the heat of the storage battery can be released to the outside through the plurality of main body portions of the cooling device.

[0024] In the above configuration, preferably, the heat dissipation part has a shape that covers the end face of the building material body where the accommodation hole opens.

[0025] According to this configuration, the area of the heat dissipation part can be ensured, and heat dissipation from the heat dissipation part can be promoted.

[0026] In the above configuration, preferably, the building material body is a log in which the accommodation hole is formed.

[0027] According to this configuration, the log can be used as a storage device for the storage battery and a material for the building. Also, a log has no joints. Therefore, if a log is used as the building material body and the storage battery is accommodated inside it, the influence of the temperature outside the building material body on the storage battery can be surely reduced, and the deterioration and performance degradation of the storage battery can be more surely suppressed.

[0028] Further, the present invention provides a method for manufacturing the above building material, including a core drilling process of drilling out the core of a log and forming the accommodation hole extending along the axial direction of the log in the log, a preservative treatment process of immersing the log in a preservative and injecting the preservative into the log under pressure, and an accommodation process of accommodating the storage battery and the main body part of the cooling device in the accommodation hole of the log.

[0029] According to this method, the preservative can penetrate into the log through the accommodation hole, and the accommodation hole can be used as a storage space for the storage battery, and a building material that is difficult to decay and incorporates a storage battery can be easily manufactured.

[0030] Further, the present invention provides a foundation structure including the above building material, having a plurality of foundation materials made of wood extending in a predetermined direction and buried in the ground in a foundation structure serving as a foundation of a building, and at least one of the foundation materials being the above building material.

[0031] According to this foundation structure, by using the foundation part of the building, the storage battery can be installed underground while suppressing its deterioration and the decline of charge and discharge efficiency, and the space on the ground can be utilized more effectively. In addition, the temperature change in the ground is smaller than that on the ground. Therefore, according to this foundation structure, the deterioration of the storage battery can be further suppressed and its performance can be made more stable.

Effects of the Invention

[0032] As described above, according to the present invention, it is possible to provide a building material that can accommodate a storage battery and suppress the deterioration of the storage battery and the decline of charge and discharge efficiency, a method for manufacturing the building material, and a foundation structure including the building material.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0034] Hereinafter, with reference to the drawings, a building material according to an embodiment of the present invention, a method for manufacturing the same, and a foundation structure including the same will be described.

[0035] (Overall Structure) FIG. 1 is a schematic configuration diagram showing a building 1 according to a first embodiment of the present invention, including a foundation structure 3 to which a building material 6 according to the first embodiment of the present invention is applied.

[0036] The building 1 includes a building main body 2 and a foundation structure 3 that supports the building main body 2 from below. In this first embodiment, the building 1 is a building used as a store such as a convenience store, and the building main body 2 includes a floor 2A, a roof 2B, and an outer wall 2C.

[0037] A power system 100 including a storage battery 20 is provided in the building 1. In addition to the storage battery 20, the power system 100 has a power generation device 101, a charge controller 102, and a DC / AC inverter 103.

[0038] The power generation device 101 generates power to charge the storage battery 20. The charge controller 102 controls the amount of power supplied from the power generation device 101 to the storage battery 20 and the like. The DC / AC inverter 103 converts the direct current output from the storage battery 20 into an alternating current and outputs it.

[0039] In this first embodiment, a solar cell panel that generates power by receiving sunlight is provided on the roof 2B, and this functions as the power generation device 101. The charge controller 102 and the DC / AC inverter 103 are installed inside the building main body 2. The storage battery 20 is provided in the foundation structure 3. The charge controller 102 is electrically connected to the power generation device 101 and the storage battery 20 via a cable 110. The electricity output from the storage battery 20 is transmitted to various electrical devices 105 provided in the building 1 via the DC / AC inverter 103. For example, the electricity output from the storage battery 20 is used for the lighting device of the signboard 105A provided on the building main body 2, the indoor lighting device 105B, and the like.

[0040] FIG. 2 is a schematic perspective view showing the foundation structure 3. As shown in FIG. 2, the foundation structure 3 includes a plurality of foundation members 5, a plurality of battery storage building materials 6, and a plurality of support columns 7. The foundation members 5 and the battery storage building materials 6 are buried in the ground as building materials that constitute the foundation for supporting the building body 2 on the ground. The above-mentioned battery storage building material 6 corresponds to the "building material" of the present invention.

[0041] The plurality of foundation members 5 have the same structure as each other. The foundation member 5 has a cylindrical shape. The foundation member 5 has a cylindrical shape in which the dimension in the axial direction, that is, the direction along the central axis of the cylinder, is larger than the outer diameter. The outer diameters and the axial dimensions of the respective foundation members 5 are substantially constant with respect to each other. For example, the outer diameter of the foundation member 5 is about 200 mm, and the axial dimension is about 3000 mm. In addition, in this specification, "having a cylindrical shape" includes not only the case of being exactly cylindrical but also the case of having a generally cylindrical shape as a whole although it deviates from the exact cylindrical shape.

[0042] Each foundation member 5 is buried in the ground in a posture in which its axis extends substantially along the first horizontal direction. The foundation members 5 are arranged such that a plurality of foundation members 5 arranged coaxially or a row of foundation members 5 consisting of one foundation member 5 are arranged in a plurality along the second horizontal direction orthogonal to the first direction. Each row is spaced apart from each other and is arranged substantially parallel to each other in the second direction. The plurality of foundation members 5 included in one row are in contact with other adjacent foundation members 5. Hereinafter, the above-mentioned row of foundation members 5 will be referred to as the first foundation part 5A as appropriate.

[0043] As shown in FIG. 2, in the present first embodiment, the foundation structure 3 has eight first foundation parts 5A, and each first foundation part 5A is composed of five foundation members 5.

[0044] The base material 5 is composed of a log. Specifically, the base material 5 is composed of a single columnar solid wood log without joints. In the base material 5, a first through-hole 5C is formed that extends along its axis and opens at both end faces in the axial direction. The first through-hole 5C is formed at the center of the base material 5 and at the center in a cross-section perpendicular to the axis of the base material 5. The first through-hole 5C is a round hole, and the central axis of the first through-hole 5C and the central axis of the base material 5 substantially coincide. The first through-hole 5C is a hole for allowing a preservative to penetrate into the interior of the base material 5. That is, in the present first embodiment, the base material 5 is a log impregnated with a preservative.

[0045] The plurality of battery housing building materials 6 have the same structure as each other. The battery housing building material 6 has a cylindrical shape as a whole. The battery housing building material 6 has a cylindrical shape in which the dimension in the axial direction, that is, the direction along the central axis of the cylinder, is larger than the outer diameter, and the longitudinal direction of the battery housing building material 6 coincides with its axial direction. The outer diameter and the axial dimension of each battery housing building material 6 are substantially constant.

[0046] Each battery housing building material 6 is buried in the ground while being placed on the upper surface of the base material 5. Each battery housing building material 6 is arranged so as to form a grid in plan view by the battery housing building material 6 and the base material 5.

[0047] Specifically, each battery storage building material 6 is placed on the base material 5 in a posture where its axis extends substantially along the second direction. The battery storage building materials 6 are arranged such that a plurality of battery storage building materials 6 arranged coaxially or a row of battery storage building materials 6 consisting of one battery storage building material 6 are arranged in a plurality of rows along the first direction. Hereinafter, the row of the battery storage building materials 6 described above is referred to as the second base portion 6A as appropriate. Each second base portion 6A is spaced apart from each other in the first direction and arranged substantially parallel to each other. Further, the second base portion 6A straddles a plurality of first base portions 5A, and the second base portion 6A and the first base portion 5A form a substantially rectangular lattice in plan view. In the present first embodiment, two common battery storage building materials 6 are placed on two adjacent base materials 5 in the second direction in a state where they straddle these two base materials 5, and the two base materials 5 and the two battery storage building materials 6 are assembled in a crossbeam shape.

[0048] As shown in FIG. 2, in the present first embodiment, the foundation structure 3 has ten second base portions 6A, and each second base portion 6A is composed of four battery storage building materials 6.

[0049] The plurality of columns 7 have the same structure as each other. The column 7 has a substantially cylindrical shape. The column 7 is fixed to the battery storage building material 6 in a posture extending upward from the battery storage building material 6. The column 7 is fixed at one position each at a position where the base material 5 and the battery storage building material 6 intersect in plan view. At the upper end of the column 7, a floor material constituting the floor 2A of the building body 2 is fixed along the horizontal plane.

[0050] The upper part of the column 7 of the foundation structure 3 is arranged so as to protrude upward from the ground. As described above, the base material 5 and the battery storage building material 6 are entirely buried in the ground, and the lower part of the column 7 is also buried in the ground.

[0051] (Battery storage building material) Details of the battery storage building material 6 will be described.

[0052] FIG. 3 is a schematic perspective view of the second base portion 6A. FIG. 4 is a schematic perspective view of the battery housing building material 6. FIG. 5 is a longitudinal sectional view of the battery housing building material 6, which is a schematic view when the battery housing building material 6 is cut along a plane along its axis. FIG. 6 is a schematic sectional view taken along line VI-VI of FIG. 5.

[0053] The battery housing building material 6 includes a building material main body 10, a plurality of rechargeable batteries 20, and a cooling device 30.

[0054] The building material main body 10 is composed of wood extending in a predetermined direction. The building material main body 10 forms the outer shape of the battery housing building material 6, and the building material main body 10 has a cylindrical shape. Also, the building material main body 10 has a cylindrical shape in which the dimension in the axial direction, that is, the direction along the central axis of the cylinder, is larger than the outer diameter, and the longitudinal direction of the building material main body 10 coincides with the axial direction. The building material main body 10 is composed of a log, that is, a solid cylindrical material, similar to the base material 5.

[0055] In the building material main body 10, a housing hole 11 is formed that extends along its axis and opens to at least one end face on the axial direction (that is, the longitudinal direction) of the building material main body 10. In the first embodiment, the housing hole 11 opens to both end faces in the axial direction of the building material main body 10. The housing hole 11 is formed at the center of the building material main body 10 and at the center in a cross section orthogonal to the axis of the building material main body 10. The housing hole 11 is a round hole, and its central axis substantially coincides with the central axis of the building material main body 10. The housing hole 11 is a hole for allowing a preservative to penetrate into the inside of the building material main body 10. That is, in the first embodiment, the building material main body 10 is a log impregnated with a preservative. As will be described later, in the first embodiment, a preservative is pressure-injected into the building material main body 10, and the preservative penetrates from the portions exposed to the outside of the building material main body 10, that is, both end faces, the outer peripheral surface, and the inner peripheral surface of the housing hole in the axial direction of the building material main body 10, toward the inside of the building material main body 10. Thus, at least both end portions, the outer peripheral portion, and the peripheral portions of the housing hole in the axial direction of the building material main body 10 are impregnated with the preservative. In the first embodiment, substantially the entire building material main body 10 is impregnated with the preservative.

[0056] In the first embodiment, the hole diameter d11 of the accommodation hole 11 is set to a dimension that is 50% or less of the outer diameter of the building material body 10. For example, the outer diameter d10 of the building material body 10 is about 200 mm, the dimension in the axial direction is about 1800 mm, and the hole diameter d11 of the accommodation hole 11 is about 60 mm, and the hole diameter d11 of the accommodation hole 11 is set to a dimension that is about 30% of the outer diameter of the building material body 10. In the first embodiment, the building material body 10 and the base material 5 are made of the same material and have the same structure.

[0057] The plurality of storage batteries 20 have the same structure as each other. That is, the plurality of storage batteries 20 are the same type of battery and have the same dimensions as each other.

[0058] In the first embodiment, the storage battery 20 is an alkaline aqueous battery in which an alkaline aqueous solution is used as an electrolyte. Specifically, in the storage battery 20 of the first embodiment, a nickel oxide compound is used for the positive electrode, a hydrogen storage alloy is used for the negative electrode, and a potassium hydroxide aqueous solution is used for the electrolyte.

[0059] As shown in FIGS. 5 and 6, the storage battery 20 has a substantially cylindrical shape as a whole, and has a plus terminal 21 provided at one end in the axial direction, that is, the direction along the central axis of the cylinder, and a minus terminal 22 provided at the other end. The storage battery 20 has a cylindrical shape in which the dimension in the axial direction is larger than the outer diameter, and the longitudinal direction of the storage battery 20 coincides with the axial direction.

[0060] The plurality of storage batteries 20 are housed inside the accommodation hole 11. Each storage battery 20 is entirely housed inside the accommodation hole 11. The storage batteries 20 are arranged so as to be aligned along the axial direction of the building material body 10 and the circumferential direction of the accommodation hole 11, respectively.

[0061] Specifically, the plurality of storage batteries 20 are divided into battery packs 20A each consisting of a plurality of storage batteries 20 electrically connected in series. In one battery pack 20A, the plurality of storage batteries 20 included therein are arranged along the axial direction of the building material body 10 in a state where their axial directions coincide with the axial direction of the building material body 10. Also, each battery pack 20A is arranged in the circumferential direction along the inner peripheral surface of the accommodation hole 11. The battery packs 20A are arranged at substantially equal intervals in the circumferential direction of the accommodation hole 11.

[0062] In the present first embodiment, one battery pack 20A is composed of 10 storage batteries 20. Also, 10 battery packs 20A are accommodated in the accommodation hole 11. In one battery pack 20A, the postures of the plurality of storage batteries 20 included therein are such that the terminals of the same type of pole face the same side in the axial direction of the building material body 10, and the terminals on one side of plus and minus are in contact with the terminals on the other side of the adjacent storage battery 20.

[0063] Each battery pack 20A is electrically connected in parallel. Specifically, each battery pack 20A is arranged such that the plus terminal 21 is located at one end in the axial direction of the building material body 10 and the minus terminal 22 is located at the other end, and the terminals of the same type of pole located at each end are electrically connected. Cables 110, 110 extend from the connection portions of the plus terminals of the battery packs 20A and the connection portions of the minus terminals 22, respectively.

[0064] The cooling device 30 is a device for discharging the heat generated from the storage battery 20 to the outside of the building material body 10. The cooling device 30 has a heat transfer part 31 and a pair of heat radiating plates 32. In the present first embodiment, the heat transfer part 31 corresponds to the "main body part" of the present invention, and the heat radiating plate 32 corresponds to the "heat radiating part".

[0065] The heat transfer part 31 is disposed inside the accommodation hole 11. The heat transfer part 31 has a cylindrical shape and is disposed inside the accommodation hole 11 in a posture extending along the axial direction of the building material main body 10, that is, in a posture where its central axis extends along the axial direction of the building material main body 10. The heat transfer part 31 is made of a material with a higher thermal conductivity than wood. For example, a round metal pipe is used as the heat transfer part 31.

[0066] The heat transfer part 31 is disposed inside the accommodation hole 11 in a state of being in contact with each storage battery 20. Specifically, the heat transfer part 31 is disposed in a region surrounded by a plurality of storage battery groups 20A arranged in the circumferential direction of the accommodation hole 11 in a state where its outer peripheral surface is in contact with the outer peripheral surface of each storage battery 20. In other words, each storage battery group 20A is arranged along the circumferential direction of the heat transfer part 31 on its outer peripheral surface. In the axial direction of the building material main body 10, the length dimension of the heat transfer part 31 is larger than the length dimension of the storage battery group 20A, and the storage battery group 20A is in contact with the heat transfer part 31 over its entire length. That is, the outer peripheral surfaces of all the storage batteries 20 are in contact with the heat transfer part 31. In the example of FIG. 5, the heat transfer part 31 is disposed at the center of the accommodation hole 11, at a position where its central axis substantially coincides with the central axis of the accommodation hole 11.

[0067] Regarding the axial direction of the building material main body 10, one end of the heat transfer part 31 protrudes outward from the end surface of the building material main body 10, and the other end is located inside the end surface of the building material main body 10. Hereinafter, the axial direction of the building material main body 10 will be appropriately referred to as the front-rear direction, and the side where the heat transfer part 31 protrudes from the building material main body 10 will be referred to as the front, and the opposite side will be referred to as the rear for explanation.

[0068] The two heat dissipation plates 32 have the same shape as each other. The heat dissipation plate 32 has a substantially cylindrical shape with a bottom. Specifically, the heat dissipation plate 32 has a substantially disc-shaped bottom 32A and a first standing wall portion 32B extending from the outer peripheral edge of the bottom 32A in one direction along the central axis of the heat dissipation plate 32. A second through hole 32C penetrating the front and back of the bottom 32A is formed at the center of the bottom 32A. The heat dissipation plate 32 further has a second standing wall portion 32D extending from the peripheral edge of the second through hole 32C in one direction along the central axis of the heat dissipation plate 32, and a cylindrical portion is formed at the center of the heat dissipation plate 32.

[0069] The outer diameter of the bottom 32A and thus the heat sink 32 is set to be larger than the outer diameter of the building material body 10. The inner diameter of the first vertical wall portion 32B is set to be approximately the same as or slightly larger than the outer diameter of the building material body 10. The inner diameters of the second through-hole 32C and the second vertical wall portion 32D are set to be approximately the same as the outer diameter of the heat transfer portion 31.

[0070] The front heat sink 32F, which is one of the heat sinks 32, has the front end portion of the building material body 10 inserted into the inner side thereof, that is, the portion surrounded by the first vertical wall portion 32B, and is fixed to the building material body 10 with the front end portion of the heat transfer portion 31 inserted through the inside of the second vertical wall portion 32D and the second through-hole 32C. As described above, the inner diameters of the second through-hole 32C and the second vertical wall portion 32D of the heat sink 32 are approximately the same as the outer diameter of the heat transfer portion 31. Thus, the inner peripheral surface of the second vertical wall portion 32D and the second through-hole 32C of the front heat sink 32F and the outer peripheral surface of the front end portion of the heat transfer portion 31 inserted therethrough are in surface contact, and they are in thermal contact. In this first embodiment, the front heat sink 32F is fixed to the building material body 10 by screwing the first vertical wall portion 32B to the outer peripheral surface of the building material body 10.

[0071] The bottom 32A of the front heat dissipation plate 32F faces the front end face of the building material body 10 in front of it and covers the front end face of the building material body 10 from the front. That is, the bottom 32A of the front heat dissipation plate 32F and thus the front heat dissipation plate 32F have a shape that covers the front end face of the building material body 10. The bottom 32A of the front heat dissipation plate 32F covers the entire front end face of the building material body 10. The first vertical wall portion 32B of the front heat dissipation plate 32F is disposed on the outer peripheral surface of the building material body 10 and extends along the outer peripheral surface of the building material body 10. As described above, the inner diameter of the first vertical wall portion 32B is set to be approximately the same as or slightly larger than the outer diameter of the building material body 10, and the first vertical wall portion 32B of the front heat dissipation plate 32F and the outer peripheral surface of the building material body 10 are in contact or close to each other. As described above, the bottom 32A and the first vertical wall portion 32B of the front heat dissipation plate 32F are located outside the building material body 10 and are exposed outside the accommodation hole 11. That is, the bottom 32A and the first vertical wall portion 32B of the front heat dissipation plate 32F of the cooling device 30 are disposed so as to be exposed outside the accommodation hole 11.

[0072] The rear heat dissipation plate 32R, which is the other heat dissipation plate 32, has the rear end portion of the building material body 10 inserted into the inner side thereof, that is, the portion surrounded by the first vertical wall portion 32B, and the rear end portion of the heat transfer portion 31 is inserted into the inner side of the second vertical wall portion 32D, and is fixed to the rear end portion of the building material body 10. As described above, the inner diameters of the second through hole 32C and the second vertical wall portion 32D of the heat dissipation plate 32 are substantially the same as the outer diameter of the heat transfer portion 31. Therefore, the inner peripheral surface of the second vertical wall portion 32D of the rear heat dissipation plate 32R and the outer peripheral surface of the rear end portion of the heat transfer portion 31 inserted therein are in surface contact, and they are in thermal contact. In the present first embodiment, similar to the front heat dissipation plate 32F, the rear heat dissipation plate 32R is fixed to the building material body 10 by screwing the first vertical wall portion 32B thereof to the outer peripheral surface of the building material body 10.

[0073] The bottom 32A of the rear heat dissipation plate 32R faces the rear end surface of the building material body 10 and covers the rear end surface of the building material body 10 from the rear. That is, the bottom 32A of the rear heat dissipation plate 32R, and thus the rear heat dissipation plate 32R, has a shape that covers the rear end surface of the building material body 10. The bottom 32A of the rear heat dissipation plate 32R covers the entire rear end surface of the building material body 10. Similar to the front heat dissipation plate 32F, the first standing wall portion 32B of the rear heat dissipation plate 32R is disposed on the outer peripheral surface of the building material body 10 and extends along the outer peripheral surface of the building material body 10. As described above, the inner diameter of the first standing wall portion 32B is set to be substantially the same as or slightly larger than the outer diameter of the building material body 10, and the first standing wall portion 32B of the rear heat dissipation plate 32R and the outer peripheral surface of the building material body 10 are in contact or close to each other. As described above, the bottom 32A and the first standing wall portion 32B of the rear heat dissipation plate 32R are located outside the building material body 10 and are exposed outside the accommodation hole 11. That is, the bottom 32A and the first standing wall portion 32B of the rear heat dissipation plate 32R of the cooling device 30 are disposed so as to be exposed outside the accommodation hole 11.

[0074] Here, as described above, the front end portion of the heat transfer portion 31 is inserted into the second through hole 32C, and the heat transfer portion 31 protrudes forward from the front surface of the front heat dissipation plate 32F. On the other hand, the rear end portion of the heat transfer portion 31 is inserted only into the front side portion of the second standing wall portion 32D of the rear heat dissipation plate 32R. With this structure, as shown in FIG. 7, the battery storage building material 6 is connected to other battery storage building materials 6 arranged coaxially.

[0075] FIG. 7 is an enlarged cross-sectional view showing a part of a second base portion 6A composed of a plurality of battery storage building materials 6. As shown in FIG. 7, in the plurality of coaxially arranged battery storage building materials 6, a portion of the heat transfer portion 31 of one of the battery storage building materials 6 that protrudes forward from the front heat dissipation plate 32F is inserted into the second through hole 32C of the rear heat dissipation plate 32R and the rear portion of the second standing wall portion 32D of the other battery storage building material 6, thereby connecting them to each other. Note that caps 91 and 92 shown by broken lines in FIG. 5 are attached to the battery storage building materials 6 that are not connected to other battery storage building materials 6. Specifically, a cap 91 that covers the front end from the outside is attached to the front end of the heat transfer portion 31 of the battery storage building material 6 that is not connected to other battery storage building materials 6 on the front side. Further, a cap 92 is attached to the rear portion of the second standing wall portion 32D of the rear heat dissipation plate 32R of the battery storage building material 6 that is not connected to other battery storage building materials 6 on the rear side, and the rear portion of the second standing wall portion 32D is sealed.

[0076] Next, a method for manufacturing the battery storage building material 6 configured as described above will be described with reference to the flowchart of FIG. 8.

[0077] First, a log to be the material of the building material body 10 is prepared (step S1: log preparation step). Specifically, standing trees are felled in a forest, the bark is removed at a sawmill, and the log is processed into a columnar shape.

[0078] Next, core drilling is performed on the log to form the accommodation hole 11 (step S2: core drilling step). Specifically, an accommodation hole 11 that opens along the axis of the prepared log and at one end in the axial direction of the log is formed. In the first embodiment, the accommodation hole 11 is formed in the center of the log. Further, as the accommodation hole 11, a through hole that opens at both end faces in the axial direction of the log is formed.

[0079] Next, the log having the accommodation hole 11 formed therein is subjected to an anti-corrosion treatment (Step S3: anti-corrosion treatment step). Specifically, a preservative is pressure-injected into the log. That is, the log is placed in a pressure vessel, and a preservative is introduced to immerse the log in the preservative. Then, the inside of the vessel is pressurized to allow the preservative to penetrate into the log. Here, the accommodation hole 11 is formed in the log. Therefore, the preservative penetrates into the log not only from the outer peripheral surface but also from the inner peripheral surface of the accommodation hole 11. As a result, the preservative penetrates into a wider range in the log having the accommodation hole 11 than in the log without it. Also, in addition to the outer peripheral portion of the log, the peripheral portion of the accommodation hole 11, that is, the inner portion of the log, is impregnated with the preservative. In the present first embodiment, as the preservative, a chemical having termite-proof properties, that is, a preservative and termite-proof agent, is used. For example, ACQ is used as the preservative.

[0080] By carrying out the steps of the above Steps S1 to S3, the building material main body 10 is manufactured.

[0081] After manufacturing the building material main body 10, the battery unit 120 is accommodated in the accommodation hole 11 (Step S5: accommodation step). The battery unit 120 is a unit composed of a heat transfer part 31 and a plurality of storage batteries 20. That is, each storage battery 20 accommodated in the accommodation hole 11 is fixed to the heat transfer part 31, and each storage battery 20 and the heat transfer part 31 are unitized. As described above, each storage battery 20 is fixed to the heat transfer part 31 in a state of being in contact with it. The battery unit 120 is inserted into the inside of the accommodation hole 11 from the opening portion on one side of the accommodation hole 11. As a result, the battery unit 120, that is, the heat transfer part 31 and the plurality of storage batteries 20, are accommodated in the accommodation hole 11.

[0082] Next, the heat dissipation plate 32 is attached to the building material body 10 (Step S5: Attachment Step). Specifically, while inserting the front end portion of the heat transfer portion 31 inside the second vertical wall portion 32D and the second through hole 32C of the front heat dissipation plate 32F, the front end portion of the building material body 10 is inserted inside the first vertical wall portion 32B of the front heat dissipation plate 32F, and the front heat dissipation plate 32F is fixed to the building material body 10 in a state of covering the front end portion of the building material body 10. Also, while inserting the rear end portion of the heat transfer portion 31 inside the front side portion of the second vertical wall portion 32D of the rear heat dissipation plate 32R, the rear end portion of the building material body 10 is inserted inside the first vertical wall portion 32B of the rear heat dissipation plate 32R, and the rear heat dissipation plate 32R is fixed to the building material body 10 in a state of covering the rear end portion of the building material body 10.

[0083] By carrying out each of the above steps, the battery storage building material 6 is manufactured.

[0084] (Function, etc.) As described above, the battery storage building material 6 according to the first embodiment can be used as a material constituting the foundation structure 3 and can also be used as a storage container for housing the battery 20. Therefore, when installing the battery 20 in the building 1, there is no need to separately prepare a space and a device for housing the battery 20.

[0085] In particular, in the battery storage building material 6 according to the first embodiment, the battery 20 is housed in a material used for the foundation structure 3 and buried in the ground. Therefore, there is no need to secure a housing space for the battery 20 on the ground, and the space on the ground can be utilized more effectively.

[0086] Moreover, the building material body 10 is made of wood with high heat insulation performance. Therefore, the heat insulation of the space in which the battery 20 is housed can be enhanced, and the influence of temperature changes around the building material body 10 on the battery 20 can be suppressed to a small level. Specifically, when the temperature around the building material body 10, that is, the outside air temperature and the ground temperature are high, it is possible to prevent the battery 20 from becoming hot and its deterioration from progressing, and when the temperature around the building material body 10 is low, it is possible to prevent the battery 20 from becoming excessively low in temperature and its charge and discharge efficiency from decreasing.

[0087] Furthermore, in the battery storage building material 6 according to the first embodiment described above, the battery storage building material 6 including the building material main body 10 and the cooling device 30 is buried in the ground. Here, the temperature change in the ground is smaller than that on the ground. Therefore, the temperature change of the battery 20 is more effectively suppressed, and the deterioration of the battery 20 and the decrease in charge and discharge efficiency are effectively suppressed.

[0088] Here, when the battery storage building material 6 is buried in the ground, the building material main body 10 is likely to decay. In contrast, in the battery storage building material 6 according to the first embodiment described above, the building material main body 10 is impregnated with an antiseptic. Therefore, the progress of decay of the building material main body 10 can be suppressed and its lifespan can be extended. Thus, according to the battery storage building material 6 according to the first embodiment described above, by impregnating the building material main body 10 with an antiseptic, the decay of the building material main body 10 can be suppressed. In particular, if this battery storage building material 6 is applied to a building disposed underground or a building installed outdoors as in the first embodiment described above, its decay can be effectively prevented and its lifespan can be surely extended.

[0089] Also, in the battery storage building material 6 according to the first embodiment described above, a cooling device 30 is provided in the battery storage building material 6, and a heat transfer part 31 having a shape extending along the axial direction of the building material main body 10 is disposed in contact with each battery 20 inside the accommodation hole 11, and a heat dissipation plate 32 including a bottom part 32A and a first vertical wall part 32B exposed outside the accommodation hole 11 is fixed to the building material main body 10 in a state of being in contact with the heat transfer part 31. Therefore, the heat generated from the battery 20 during charge and discharge is transmitted to the heat transfer part 31, transmitted from the heat transfer part 31 to the heat dissipation plate 32, and the heat transmitted to the heat transfer part 31 is released from the heat dissipation plate 32 to the outside of the accommodation hole 11 and the building material main body 10. That is, according to the battery storage building material 6 according to the first embodiment described above, the heat generated from the battery 20 during charge and discharge can be released to the outside of the accommodation hole 11 through the heat transfer part 31 and the heat dissipation plate 32, and the battery 20 can be cooled by the cooling device 30. Therefore, it is possible to prevent the battery 20 from becoming high temperature due to the heat it generates itself and the deterioration from progressing.

[0090] In particular, in the battery housing building material 6 according to the first embodiment described above, the front heat dissipation plate 32F and the rear heat dissipation plate 32R each have a shape that covers the front end face and the rear end face of the building material body 10. That is, each of the heat dissipation plates 32F and 32R extends along each end face of the building material body 10 and has a relatively large area. Therefore, heat dissipation from the heat dissipation plates 32F and 32R is promoted, and a temperature rise of the battery 20 can be more reliably suppressed.

[0091] Further, in the battery housing building material 6 according to the first embodiment described above, the heat transfer portion 31 is disposed in a state of being in contact with each battery 20 at a position surrounded by the batteries 20 arranged along the circumferential direction of the accommodation hole 11. Therefore, the heat of each battery 20 can be released to the outside of the accommodation hole 11 using the common heat transfer portion 31. Accordingly, the configuration can be simplified as compared with the case where the heat transfer portion 31 corresponding to each battery 20 is provided individually.

[0092] Further, in the battery housing building material 6 according to the first embodiment described above, since an alkaline aqueous solution is used as the electrolyte of the battery 20, the safety can be enhanced and the deterioration of the battery 20 can be more suppressed.

[0093] Specifically, since the electrolyte of the battery 20 is an aqueous solution, ignition of the battery 20 can be suppressed, so the safety in case of fire can be enhanced. Also, it is known that when an alkaline aqueous battery is used as the battery, a battery that is resistant to overcharging and over-discharging and is less likely to deteriorate can be realized. Therefore, in the battery housing building material 6 according to the first embodiment described above, since the battery 20 is an alkaline aqueous battery, the progress of deterioration of the battery 20 can be further suppressed. Further, since overcharging and over-discharging are possible, it is not necessary to strictly control the input / output current of the battery 20, and it is not necessary to provide a control circuit for each battery 20, so the configuration for controlling the battery 20 can be simplified.

[0094] In addition, in the battery housing building material 6 according to the first embodiment described above, in the housing hole 11, a plurality of batteries 20 are electrically connected in series and arranged side by side along the axial direction of the building material main body 10. Therefore, by utilizing the shape extending in the axial direction of the building material main body 10, a large number of batteries 20 can be housed in the housing hole 11. In addition, a high voltage can be realized by connecting a plurality of batteries 20 in series. Furthermore, a plurality of battery packs 20A each composed of batteries 20 connected in series are housed in the housing hole 11, and these battery packs 20A are electrically connected in parallel. Therefore, even when some of the batteries 20 fail and the battery pack 20A including them does not operate, it is possible to operate other battery packs 20A and maintain the charging and discharging of the batteries 20 included therein.

[0095] In addition, in the battery housing building material 6 according to the first embodiment described above, as the building material main body 10, a log in which the housing hole 11 is formed is used, and the log can be used as a storage device for the battery 20 and a material for a building. In addition, since the log has no joints, by using the log as the building material main body 10, the influence of the temperature around the building material main body 10 on the battery 20 can be surely reduced, and the deterioration and performance degradation of the battery 20 can be more surely suppressed.

[0096] In addition, in the method for manufacturing the battery housing building material 6 according to the first embodiment described above, after performing a core drilling process to form the housing hole 11 in the log, an anti-corrosion treatment process is performed, and the log is immersed in an anti-corrosion agent and the anti-corrosion agent is pressure-injected into the log. Therefore, the anti-corrosion agent can penetrate into the log through its outer peripheral surface and the inner peripheral surface of the housing hole 11. Therefore, the anti-corrosion agent can penetrate into a wider range of the log, and it is possible to easily manufacture the battery housing building material 6 that is not easily decayed and incorporates the battery 20.

[0097] (Second Embodiment) Next, the battery housing building material 206 according to the second embodiment will be described. In the first and second embodiments, while the arrangement of the battery 20 and the heat transfer part 231 in the accommodation hole 11 is different, the other configurations are substantially the same. Therefore, hereinafter, only the arrangement of the battery 20 and the heat transfer part 231 in the accommodation hole 11 will be described. Also, elements having the same configuration as those in the first embodiment will be illustrated and described using the same reference numerals.

[0098] FIG. 9 is a diagram corresponding to FIG. 6 and is a schematic cross-sectional view of the battery housing building material 206. As shown in FIG. 9, similar to the first embodiment, also in the second embodiment, the heat transfer part 231 has a cylindrical shape and is disposed inside the accommodation hole 11 in a posture extending along the axial direction of the building material main body 10, that is, a posture in which its central axis extends along the axial direction of the building material main body 10. On the other hand, in the second embodiment, a plurality of heat transfer parts 231 are disposed inside the accommodation hole 11. The plurality of heat transfer parts 231 are arranged along the circumferential direction of the accommodation hole 11. Specifically, four heat transfer parts 231 are arranged at substantially equal intervals along the circumferential direction of the accommodation hole 11.

[0099] Also, in the second embodiment, a plurality of batteries 20 are accommodated in the accommodation hole 11 in a state of being in contact with each heat transfer part 231 at a position surrounded by the plurality of heat transfer parts 231. Specifically, in the second embodiment, only one battery pack 20A, which is a plurality of batteries 20 arranged in series along the axial direction of the building material main body 10 and electrically connected in series, is accommodated in the accommodation hole 11. This battery pack 20A is disposed substantially at the center of the accommodation hole 11. The plurality of heat transfer parts 231 surround these in a state where their outer peripheral surfaces are in contact with the outer peripheral surfaces of the respective batteries 20 included in the battery pack 20A. Note that, similar to the first embodiment, also in the second embodiment, the heat transfer part 231 and the battery pack 20A are connected to each other and unitized. Also, the battery housing building material 206 according to the second embodiment is manufactured in the same procedure as the battery housing building material 6 according to the first embodiment.

[0100] As described above, in the battery housing building material 206 according to the second embodiment, a plurality of heat transfer portions 231 are in contact with the battery pack 20A. Therefore, according to the battery housing building material 206 according to the second embodiment, the release of heat generated from the battery 20 to the outside of the accommodation hole 11 through the heat transfer portion 231 can be further promoted. Note that the operational effects obtained by the configuration common to the battery housing building material 6 according to the first embodiment can also be obtained similarly in the battery housing building material 206 according to the second embodiment.

[0101] (Other Modification Examples) In the above embodiment, the case where the building to which the foundation structure 3 is applied is a store has been described, but the building to which the foundation structure 3 is applied is not limited to this. For example, the foundation structure 3 may be used for a building used as a residence, a warehouse, or the like. Further, the building to which the battery housing building materials 6 and 206 are applied is not limited to the foundation structure 3. Further, the battery housing building materials 6 and 206 may be used for building elements that are not buried underground. For example, the battery housing building materials 6 and 206 may be used for beams, columns, and bridges of a building. When the battery housing building materials 6 and 206 are disposed on the ground, the property of high hygroscopicity of wood is effectively exhibited, and by housing the battery inside the building material main body made of wood, it is possible to prevent the battery from malfunctioning due to condensation occurring inside or around the battery.

[0102] In the above embodiment, the case where the battery 20 is an alkaline aqueous battery has been described, but the type of the battery 20 is not limited to this.

[0103] Further, the specific configuration of the cooling device, which is a device for releasing the heat of the battery 20 to the outside of the accommodation hole 11 to cool the battery 20, is not limited to the above.

[0104] For example, the cooling device may be composed of a single component. Specifically, in the above embodiment, the heat transfer part 31 and the heat dissipation plate 32 are provided in the cooling device 30 as different components. The heat transfer part 31 functions as a component that has a shape extending along the axial direction (longitudinal direction) of the building material body 10 and is disposed in contact with the storage battery 20 inside the accommodation hole 11. The heat dissipation plate 32 functions as a component that contacts the above components and is exposed outside the accommodation hole 11 at the end in the axial direction (longitudinal direction) of the building material body 10. However, it may be configured such that a single component has the above two functions. For example, the above heat dissipation plate 32 is omitted and both ends of the heat transfer part 31 are configured to be exposed outward through the opening ends of the accommodation hole 11, and both ends of the heat transfer part 31 are made to function as a heat dissipation part that is a component exposed outside the above accommodation hole 11, and the other part of the heat transfer part 31 is made to function as a main body part that is a component disposed in contact with the above storage battery 20. Further, the heat dissipation part, which is a component exposed outside the accommodation hole 11, only needs to be configured to be exposed outside the accommodation hole 11 through the opening end of the accommodation hole 11. The heat dissipation part may be configured to be exposed outside through the opening end of the accommodation hole 11 while being located inside the accommodation hole 11, like the rear end part of the heat transfer part 31 according to the above embodiment.

[0105] Also, in the above embodiment, the case where the building material body 10 is impregnated with a preservative has been described. However, wood that is not impregnated with a preservative may be used for the building material body 10.

[0106] Also, in the above embodiment, the case where the building material body 10 is a log with the accommodation hole 11 formed has been described. However, other woods may be used as the building material body 10. For example, a solid square timber or a glued laminated timber in a cylindrical or square column shape may be used.

[0107] In the above-described embodiment, the case where the building material body 10 is a single log has been described. However, the building material body 10 may be composed of a plurality of woods. For example, a plurality of woods such as logs, each having a through hole formed at both ends in the axial direction, are arranged in parallel in each axial direction so that the through holes communicate with each other, thereby obtaining a building material body having a shape extending in the axial direction as a whole and having a storage hole formed inside, which may be used.

[0108] In the above-described embodiment, the case where the storage hole 11 opens at both end faces in the axial direction of the building material body 10 has been described. However, the storage hole may open only at one end face in the axial direction of the building material body 10.

[0109] In the above-described embodiment, the case where the inner diameter of the storage hole is 50% or less of the outer diameter of the building material body 10 has been described. However, the dimension of the storage hole is not limited to this, and it may be larger than 50% of the outer diameter of the building material body 10. Other dimensions are also not limited to the dimensions shown above.

[0110] In the above-described embodiment, the case where a plurality of storage batteries 20 are accommodated in the storage hole 11 in a state of being electrically connected in series has been described. However, the connection configuration of the storage batteries 20 is not limited to this. In the above-described embodiment, the case where a plurality of storage batteries 20 are accommodated in the storage hole 11 in a state of being arranged in the axial direction of the building material body 10 has been described. However, the arrangement configuration of the storage batteries 20 is not limited to this. In the above-described embodiment, the case where a plurality of storage batteries 20 are accommodated in the storage hole 11 has been described. However, only one storage battery 20 may be accommodated. Also, when a plurality of storage batteries 20 are provided, the number thereof is not limited to the number according to the above-described embodiment.

Explanation of Reference Numerals

[0111] 1 Building 3 Foundation Structure 6 Battery Storage Building Material (Building Material) 10 Building Material Body 11 Storage Hole 20 Storage Battery 30 Cooling Device 31 Heat Transfer Part (Main Body Part) 32 Heat Dissipation Plate (Heat Dissipation Part) 206 Battery housing building material (building material, second embodiment) 231 Heat transfer part (main body part, second embodiment)

Claims

1. A building material body made of wood extending in a predetermined direction, a rechargeable battery, and a cooling device for cooling the battery, wherein a housing hole extending along the longitudinal direction of the building material body and opening at an end face on at least one side in the longitudinal direction is formed in the building material body, the battery is housed inside the housing hole, the cooling device has a main body portion extending along the longitudinal direction of the building material body and disposed in contact with the battery inside the housing hole, and a heat radiating portion that is in thermal contact with the main body portion and exposed to the outside of the housing hole at the end face of the building material body where the housing hole opens, and is characterized by such a building material.

2. In the building material according to Claim 1, the housing hole is formed in the center of the building material body and opens at both end faces in the longitudinal direction of the building material body, and its inner diameter is set to a dimension of 50% or less of the outer diameter of the building material body, and is characterized by such a building material.

3. In the building material according to Claim 1, the battery is an alkaline battery in which an alkaline aqueous solution is used as an electrolyte, and is characterized by such a building material.

4. In the building material according to Claim 1, a battery pack composed of a plurality of the batteries arranged in the longitudinal direction of the building material body and electrically connected in series to each other is housed in the housing hole in a state of being electrically connected in parallel to each other, and is characterized by such a building material.

5. In the building material according to Claim 1, the building material body is impregnated with a preservative at least in its outer peripheral portion and the peripheral portion of the housing hole, and is characterized by such a building material.

6. In the building material according to Claim 5, the building material body is buried in the ground as a building material constituting a foundation for supporting a building on the ground, and the main body portion of the battery and the cooling device are also buried in the ground, and is characterized by such a building material.

7. In the building material according to Claim 1, a plurality of the batteries arranged along the circumferential direction of the housing hole are provided, the main body portion of the cooling device is disposed in a position surrounded by the plurality of batteries in contact with each battery, and is characterized by such a building material.

8. In the building material according to Claim 1, the cooling device includes a plurality of the main body portions arranged along the circumferential direction of the housing hole, the battery is disposed in a position surrounded by the plurality of the main body portions in contact with each main body portion, and is characterized by such a building material.

9. In the building material according to claim 1, the heat dissipation part has a shape covering an end face of the building material body where the accommodation hole opens, and the building material is characterized by this.

10. In the building material according to claim 1, the building material body is a log in which the accommodation hole is formed, and the building material is characterized by this.

11. In a method for manufacturing the building material according to claim 10, a core drilling process of drilling out the core of the log to form the accommodation hole extending along the axial direction of the log; a preservative treatment process of immersing the log in a preservative and injecting the preservative into the log under pressure; and an accommodation process of accommodating the battery and the main body part of the cooling device in the accommodation hole of the log, and the method for manufacturing the building material is characterized by this.

12. In a foundation structure that serves as a foundation of a building and includes the building material according to any one of claims 1 to 10, it includes a plurality of foundation materials made of wood extending in a predetermined direction and buried in the ground, and at least one of the foundation materials is the building material, and the foundation structure is characterized by this.

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