Charging System

Abstract

To provide a charging system in which a storage battery including a geo-polymer as an electrolyte is provided.SOLUTION: A charging system comprises a base, a solar cell array on the base, and a battery charger. The base includes a positive electrode, a negative electrode opposed to the positive electrode, and a geo-polymer into which at least a part of the positive electrode and at least a part of the negative electrode are embedded. The battery charger is electrically connected to a solar cell array, the positive electrode, and the negative electrode. The battery charger may include a power cable constituted so as to be connected to a vehicle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] One embodiment of the present invention relates to a charging system. For example, one embodiment of the present invention relates to a charging system capable of charging a vehicle that uses electric power as at least a part of its power source, such as an automobile, a motorcycle, or an electric bicycle. [Background technology]

[0002] Geopolymers are amorphous condensation polymers formed by the reaction of an alkaline silica solution with alumina-silica powder, and have been attracting attention in recent years as materials that exhibit excellent properties different from those of concrete, which is made from cement. Geopolymers are also known to function as electrolytes in solid-state batteries (see Non-Patent Documents 1 and 2). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Chaoli, Meng et al., "Battery in the form of a cement-matrix composite," Cement & Concrete Composite, Elsevier (USA), 2010, Vol. 32, pp. 829-839 [Non-Patent Document 2] M. Surfi, et al., "Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material," Composite Structures, Elsevier (USA), 2018, Vol. 201, pp. 766-778 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one embodiment of the present invention is to provide a novel charging system. Alternatively, an object of one embodiment of the present invention is to provide a charging system provided with a storage battery containing a geopolymer as an electrolyte. [Means for solving the problem]

[0005] One embodiment of the present invention is a charging system. The charging system includes a foundation, a solar array on the foundation, and a charger. The foundation includes a positive electrode, a negative electrode opposite the positive electrode, and a geopolymer that embeds at least a portion of the positive electrode and at least a portion of the negative electrode. The charger is electrically connected to the solar array, the positive electrode, and the negative electrode. [Brief description of the drawings]

[0006] [Figure 1] 1 is a schematic side view of a charging system according to an embodiment of the present invention; [Diagram 2] 1 is a schematic front view of a charging system according to an embodiment of the present invention; [Diagram 3] 1 is a block diagram of a charging system according to an embodiment of the present invention; [Figure 4] 1A-1D are schematic top and end views of a base of a charging system according to one embodiment of the present invention. [Diagram 5] FIG. 1 is a schematic end view of a base of a charging system according to one embodiment of the present invention. [Figure 6] FIG. 2 is a schematic top view of an electrode of a charging system according to one embodiment of the present invention. [Figure 7] FIG. 1 is a schematic end view of a base of a charging system according to one embodiment of the present invention. [Figure 8] 1A-1D are schematic top and end views of a base of a charging system according to one embodiment of the present invention. [Figure 9] 1A and 1B are schematic side and end views of a pole of a charging system according to one embodiment of the present invention. [Figure 10] FIG. 2 is a schematic top view of a solar cell array of a charging system according to one embodiment of the present invention. [Figure 11] 1 is a schematic end view illustrating a method for installing a charging system according to an embodiment of the present invention. FIG. [Figure 12] 1 is a schematic end view illustrating a method for installing a charging system according to an embodiment of the present invention. FIG. [Figure 13] 1A and 1B are schematic top and end views illustrating a method of installing a charging system according to an embodiment of the present invention. [Figure 14] 1 is a schematic end view illustrating a method for installing a charging system according to an embodiment of the present invention. FIG. [Figure 15] 1 is a schematic end view illustrating a method for installing a charging system according to an embodiment of the present invention. FIG. [Figure 16] 1 is a schematic end view illustrating a method for installing a charging system according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, each embodiment of the present invention will be described with reference to the drawings, etc. However, the present invention can be embodied in various forms without departing from the gist of the present invention, and should not be construed as being limited to the description of the embodiments exemplified below.

[0008] In order to clarify the description, the drawings may show the width, thickness, shape, etc. of each part in a schematic manner compared to the actual embodiment, but these are merely examples and do not limit the interpretation of the present invention. In this specification and each drawing, elements having the same functions as those described in the previous drawings may be given the same reference numerals, and duplicated descriptions may be omitted.

[0009] Hereinafter, the expression "a structure is exposed from another structure" refers to a configuration in which a part of a structure is not covered by another structure, and also includes a configuration in which the part not covered by the other structure is covered by yet another structure.

[0010] 1.Charging system structure 1 and 2 are schematic side and front views, respectively, of a charging system 100 according to an embodiment of the present invention. The charging system 100 is a system that supplies electric power to batteries mounted on not only various electronic devices and electrical appliances, but also vehicles that use electric power as at least a part of their motive power, to perform charging. Examples of vehicles include, but are not limited to, automobiles such as trucks and passenger cars, motorcycles, bicycles, and streetcars. In the charging system 100, at least a part of the electric power to be supplied is generated using solar power generation.

[0011] 1 and 2, the charging system 100 includes a foundation 110, and has a solar cell array 130 on the foundation 110. The solar cell array 130 may be provided on a roof 102 supported by columns 104 provided on the foundation 110. The roof 102 is disposed so as to overlap the foundation 110. The charging system 100 may further include a wired charger 140, a power conditioner 150, a wireless charger 160, and the like.

[0012] A block diagram of the charging system 100 is shown in FIG. 3. In the charging system 100, the solar cell array 130 and the base 110 are electrically connected via a power conditioner 150. As described later, the base 110 has a power storage function. The voltage and current of electricity generated by the solar cell array 130 constantly fluctuate depending on the amount of solar radiation and temperature, but the power conditioner 150 adjusts the combination of voltage and current (maximum output point) that maximizes the amount of power generated, and the power obtained under the adjusted conditions is stored in the base 110. Similarly, the wired charger 140 and the wireless charger 160 are also electrically connected to the solar cell array 130 and the base 110 via the power conditioner 150. The charging system 100 may have a distribution board 152, and a commercial power system (not shown) may be connected to the distribution board. As a result, even if the amount of power generated by the solar cell array 130 is insufficient, sufficient power can be supplied to the base 110, the wired charger 140, and the wireless charger 160. Additionally, when excess power occurs in the charging system 100, the excess power can be provided to the commercial power system.

[0013] (1) Basics The foundation 110 is a base that serves as the foundation of the charging system 100. There are no restrictions on the planar shape or size of the foundation 110, and it is designed appropriately according to the environment in which the charging system 100 is installed. The thickness of the foundation 110 may be selected from the range of, for example, 5 cm to 1 m, 10 cm to 50 cm, or 10 cm to 30 cm. Vehicles to be charged, etc. are placed on the foundation 110. For this reason, the foundation is formed of a geopolymer with high strength so that it will not be destroyed even if heavy vehicles such as trucks and passenger cars are placed on it.

[0014] A specific structure of the foundation 110 will be described with reference to FIG. 4(A) and FIG. 4(B). FIG. 4(A) is a schematic top view of the foundation 110, with a portion of the geopolymer 112 omitted. FIG. 4(B) is a schematic end view along the chain line AA′ in FIG. 4(A). As shown in these figures, the foundation 110 has at least a pair of electrodes (positive electrode 114, negative electrode 116) facing each other, and further includes a geopolymer 112 in which at least a portion of the positive electrode 114 and at least a portion of the negative electrode 116 are embedded. Although not shown, the foundation 110 may include multiple pairs of positive electrodes 114 and negative electrodes 116. When multiple pairs of positive electrodes 114 and negative electrodes 116 are provided, the positive electrodes 114 and negative electrodes 116 may be arranged so that none of the pairs overlap each other, or one pair may be arranged so that at least a portion of the other pair overlaps. The foundation 110 may include reinforcing bars 118 for maintaining and increasing its strength. The number, type, and arrangement of the reinforcing bars 118 can also be determined arbitrarily. For example, as shown in Figures 4(A) and 4(B), the reinforcing bars can be configured with a plurality of main bars 118b extending parallel to each other, and a plurality of hanging members 118a extending parallel to each other and intersecting with the main bars 118b.

[0015] The positive electrode 114 and the negative electrode 116 are electrodes containing metals such as copper, nickel, aluminum, zinc, palladium, silver, chromium, and manganese. The metal materials contained in the positive electrode 114 and the negative electrode 116 are different from each other. The positive electrode 114 and the negative electrode 116 may be configured so that the positive electrode 114 contains a metal with a smaller ionization tendency. The interval between the positive electrode 114 and the negative electrode 116 may be set arbitrarily, and may be selected from the range of, for example, 0.1 mm to 80 cm, 1 mm to 50 cm, 1 mm to 10 cm, or 1 cm to 5 cm, taking into consideration the power required for the wired charger 140 and the wireless charger 160, which are loads connected to the positive electrode 114 and the negative electrode 116, and the thickness of the base 110.

[0016] The positive electrode 114 and the negative electrode 116 may be provided with terminals 114a, 116a for connection to the power conditioner 150. At least a portion of the terminals 114a and at least a portion of the terminals 116a are exposed from the geopolymer 112. This allows the positive electrode 114 and the negative electrode 116 to be electrically connected to the power conditioner 150 via the terminals 114a, 116a.

[0017] There is no restriction on the vertical relationship of the positive electrode 114, the negative electrode 116, and the reinforcing bar 118. The negative electrode 116 and the positive electrode 114 may both be arranged below the reinforcing bar 118 (i.e., at a position farther from the solar cell array 130), or as shown in FIG. 5(A), the negative electrode 116 and the positive electrode 114 may both be arranged above the reinforcing bar 118 (i.e., at a position closer to the solar cell array 130). The positive electrode 114 may also be below the negative electrode 116 (FIG. 4(B)) or above it (FIG. 5(B)). Furthermore, the reinforcing bar 118 may be arranged so as to be sandwiched between the positive electrode 114 and the negative electrode 116 (FIG. 5(C)).

[0018] Alternatively, as shown in FIG. 5(D), the positive electrode 114 and the negative electrode 116 may be embedded in the geopolymer 112, and the reinforcing bar 118 placed on top of them may be embedded in the concrete 120. Here, concrete refers to a material in which the hydrate formed by the reaction of cement, one of the raw materials, with water has hardened and does not show fluidity. Therefore, the concrete 120 and the geopolymer 112 have different compositions, for example, the calcium hydroxide composition of the former is higher than that of the latter. Since the ionic conductivity of the concrete 120 is lower than that of the geopolymer 112, forming the concrete 120 on the geopolymer 112 can reliably prevent leakage from the foundation 110.

[0019] There are no limitations on the shapes of the positive electrode 114 and the negative electrode 116, and they may be in the shape of a plate extending substantially two-dimensionally as shown in Figures 4(A) to 5(D), or may be in the shape of a rod or wire, although not shown. In the case of a plate shape, at least one of the positive electrode 114 and the negative electrode 116 may have a mesh-like form (Figures 6(A) and 6(B)).

[0020] Alternatively, as shown in Fig. 7(A), the positive electrode 114 and the negative electrode 116 may have a pleated shape. That is, the shape of the end surface perpendicular to the upper surface of the base 110 of each of the positive electrode 114 and the negative electrode 116 may be zigzag or wavy. By adopting such a shape and arrangement, the contact area of ​​the positive electrode 114 and the negative electrode 116 with the geopolymer 112 per unit area is increased, so that the energy density of the base 110 can be increased.

[0021] 7(B), the base 110 may include a spacer 126 for preventing contact between the positive electrode 114 and the negative electrode 116, and a spacer 128 for preventing contact between the positive electrode 114 or the negative electrode 116 and the rebar 118. The spacers 126 and 128 may include an insulating material such as resin or wood, or may include a geopolymer.

[0022] The arrangement of the positive electrode 114 and the negative electrode 116 may be determined arbitrarily. For example, the main surfaces of the positive electrode 114 and the negative electrode 116 may be inclined from the main surface of the base 110. Here, the main surface of the base 110 refers to the surface of the base 110 facing the solar cell array 130, and the main surface of the positive electrode 114 refers to the surface having the largest area among the flat surfaces of the positive electrode 114. The same applies to the negative electrode 116. The angle formed by each of the main surfaces of the positive electrode 114 and the negative electrode 116 and the main surface of the base 110 may be 90°, or may be 80° or more and less than 90°. For example, as shown in FIG. 8(A) and the schematic diagram of the end surface along the dashed line BB′ (FIG. 8(B)), the planar shape of the positive electrode 114 and the negative electrode 116 (shape in a plane parallel to the main surface of the base 110) may be comb-shaped. When the comb-shaped positive electrode 114 and negative electrode 116 are arranged, a part of the positive electrode 114 is sandwiched between a part of the negative electrode 116, and a part of the negative electrode 116 is also sandwiched between a part of the positive electrode 114. Although not shown, the positive electrode 114 and the negative electrode 116 may have a folded structure or a spiral shape within the geopolymer 112. By adopting such an arrangement, the volume of the positive electrode 114 and the negative electrode 116 per unit volume of the foundation 110 increases, so that the energy density of the foundation 110 can be further increased.

[0023] Here, the term "geopolymer" refers to a structural material having a different composition from concrete, and is an amorphous polycondensate formed by the reaction of an alkali silica solution with an alumina-silica powder. For this reason, the geopolymer 112 includes at least one of fine particles containing silicon oxide, fine particles containing aluminum oxide, and fine particles containing silicon oxide and aluminum oxide. The geopolymer 112 may further include fine particles containing an oxide of an alkali metal, a group 2 metal, or a transition metal, such as iron oxide, calcium oxide, magnesium oxide, sodium oxide, or potassium oxide. The geopolymer 112 may also have silicon-oxygen-aluminum (Si-O-Al) bonds, and may further have silicon-oxygen-silicon (Si-O-Si) bonds, silicon-oxygen-metal-oxygen-silicon (Si-OMO-Si) bonds, or silicon-oxygen-metal-oxygen-aluminum (Si-OMO-Al) bonds. The fine particles described above are fixed by the amorphous inorganic matter formed by the above bonds. Here, M is a metal selected from alkali metals such as lithium, sodium, potassium, and cesium, Group 2 metals such as magnesium and calcium, and transition metals such as cobalt, copper, and iron.

[0024] The geopolymer 112 may further include, as an additive, a material that exists as a metal ion in the geopolymer 112 or that ionizes to give a cation. Examples of metal ions include ions of alkali metals or group 2 elements. The material that gives the cation may be selected, for example, from transition metals. Examples of transition metals include scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, or zinc. Preferred transition metals are, for example, iron, cobalt, and copper, and so-called copper slag or steel slag may also be used.

[0025] The material that provides the cations may be a carbon material. The carbon material may be electrically conductive. Here, the carbon material is substantially sp 2Carbon nanotubes are materials composed of carbon atoms, and examples of such materials include carbon nanotubes, graphene, and fullerenes. Carbon nanotubes may be single-walled or multi-walled carbon nanotubes. There is no limitation on the diameter or length of the carbon nanotubes. In addition, one or both ends of the carbon nanotube may be capped, or one or both ends may be open. Alternatively, the carbon nanotube may be a carbon nanotube containing other molecules or ions, such as peapods, and the surface may be molecular-modified. When graphene is used as the carbon material, it may be an independent single layer of graphene, or it may be oligographene in which multiple graphenes are stacked, or graphite. In addition, graphene oxide in which a part of the basic skeleton is oxidized may be used. When fullerene is used as the carbon material, C 60 Or C 70 Not only that, but C 74 , C 76 , C 78 Alternatively, fullerenes containing metal ions such as scandium, lanthanum, and cerium may be used, or fullerenes in which some of the carbon has been modified and which have functional groups such as ester groups may be used.

[0026] Alternatively, cellulose or cellulose nanotubes may be used as the insulating carbon-containing material.

[0027] By adding the above-mentioned additives to the geopolymer 112, the battery characteristics are significantly improved, and the base 110 functions as an all-solid-state battery that exhibits excellent charge / discharge characteristics. In addition, since it has a high strength comparable to that of concrete, it also functions as a foundation for placing various heavy vehicles. Therefore, when the vehicle to be charged is parked, the stored power can be supplied to the vehicle via the wired charger 140 or the wireless charger 160. This means that by applying the embodiment of the present invention, a charging system can be constructed without providing a separate storage battery.

[0028] (2) Post The pillars 104 are provided to support the roof 102 and / or the solar cell array 130. In the charging system 100, one or more pairs of pillars 104 can be provided. The cross-sectional shape of the pillars 104 (the shape of a surface perpendicular to the extension direction) can also be selected arbitrarily, and may be a circle, an ellipse, a rectangle, an H-shape, or a C-shape. The material used for the pillars 104 can also be selected arbitrarily, and may be wood, a steel frame, or reinforced concrete.

[0029] Alternatively, the support 104 may be configured to include a geopolymer like the foundation 110. In this case, the support 104 can also be given a function as a storage battery. For example, as shown in FIG. 9, a steel frame unit is formed by combining a plurality of column main reinforcements 106b extending in the vertical direction and a plurality of hoops 106a surrounding the plurality of column main reinforcements 106b, and the geopolymer 112 is poured and hardened so as to embed the steel frame unit. At this time, a pair or a plurality of pairs of a positive electrode 114 and a negative electrode 116 facing each other are arranged so as to be surrounded by the plurality of column main reinforcements 106b and the plurality of column main reinforcements 106b. At this time, one or a plurality of spacers 115 for preventing contact between the positive electrode 114 and the negative electrode 116 may be provided between the positive electrode 114 and the negative electrode 116. The spacer 115 may be formed using an insulating material such as resin or wood, or may include a geopolymer. Although not shown, the positive electrode 114 and the negative electrode 116 are provided with terminals exposed from the geopolymer 112 so that they can be connected to a power conditioner 150. By adopting this structure, the geopolymer 112 disposed between each pair of the positive electrode 114 and the negative electrode 116 acts as an electrolyte, and as a result, the support 104 itself can be used as a storage battery, and the capacity of the charging system 100 can be further increased.

[0030] (3) Solar cell array The solar cell array 130 includes a frame 132 and a plurality of solar cell modules 134 fixed to the frame 132 (FIG. 10). Each solar cell module 134 has a cover glass and a back film (not shown), and a plurality of solar cell cells 135 are arranged between them. As the solar cell, a single crystal silicon solar cell, a polycrystalline silicon solar cell, an amorphous silicon solar cell, a solar cell including a compound semiconductor, or the like can be used. Each solar cell generates electricity by absorbing sunlight and outputs a direct current, which is supplied to the base 110 via the power conditioner 150 and stored.

[0031] (4) Power conditioner The power conditioner 150 is a device for adjusting the maximum output point of the solar cell array 130. The power conditioner 150 may further include a function for converting AC current into DC current and vice versa, and a function for selecting and switching between power from a commercial power system, power from the solar cell array 130, and power from the base 110 as the power to be supplied to the wired charger 140 and the wireless charger 160.

[0032] (5) Wired and wireless chargers The wired charger 140 is a device that receives power from the foundation 110, the solar array 130, or a commercial power system, and supplies the power to a target via a power cable 142. The wired charger 140 can be placed on the foundation 110, and is preferably placed so as to overlap the roof 102 or the solar array 130. The power cable 142 is configured so as to be connectable to various vehicles, electrical appliances, and electronic devices that receive power.

[0033] Meanwhile, the wireless charger 160 is a device that receives power from the base 110, the solar cell array 130, or a commercial power system, and supplies the power to a target in a non-contact manner. For example, when supplying power to a vehicle, the wireless charger 160 is provided on the base 110 so as to be placed under the vehicle, as shown in Fig. 1 and Fig. 2. The wireless charger 160 can be a wireless charging device of an electromagnetic induction type, a magnetic resonance type, an electric field coupling type, or a radio wave reception type.

[0034] 2. How to install the charging system An example of a method for constructing the charging system 100 will be described with reference to Figs.

[0035] First, the ground 122 on which the charging system 100 is to be installed is excavated to form a space 124 for placing the foundation 110 (FIG. 11(A)). Although not shown, a formwork may be provided along the side wall of the space 124. Then, a geopolymer 112 is poured into a part of the space 124 so as to cover the bottom surface of the space 124 (FIG. 11(B)).

[0036] The geopolymer 112 can be cast as follows. First, the raw materials, an alkaline solution and a filler, are mixed to prepare a mixture (hereinafter, precursor) 112a having fluidity. When an additive is used, the additive is further added to prepare the precursor. The temperature during mixing may be, for example, room temperature (20°C to 25°C), but there is no restriction. For example, the temperature during mixing may be selected from the range of -20°C to 40°C, 0°C to 35°C, or 15°C to 30°C. When mixing, water may be added appropriately, taking into consideration the strength required for the geopolymer 112.

[0037] Examples of the alkaline solution include an alkaline silicate solution and an aqueous solution of an alkali metal hydroxide. An example of the alkaline silicate solution is so-called water glass. Therefore, the alkaline silicate solution specifically includes an aqueous solution of an alkali metal silicate such as sodium or potassium. Examples of the alkali metal hydroxide include lithium hydroxide, sodium hydroxide, and potassium hydroxide. The concentration of the aqueous solution of an alkali metal hydroxide may be selected from the range of, for example, 5% by mass or more and 30% by mass or less, or 10% by mass or more and 20% by mass or less.

[0038] Any material containing aluminum oxide and silicon oxide can be used as the filler. Typical examples include fly ash, slag also called iron and steel slag, sewage sludge, silica fume, rice husk ash, general incineration ash, metakaolin, clay, and the like. Fly ash, also called coal ash, is the residue generated when coal is burned at a coal-fired power plant. Slag is the residue generated when silicon oxide or aluminum oxide contained in ore and ash in coke melt when refining metals from ore such as iron ore. Silica fume is dust obtained when collecting dust generated in the manufacture of metal silicon, electrofused zirconia, and the like, and contains high-purity silicon oxide. General incineration ash is the residue generated when garbage is burned in a garbage incinerator. Metakaolin is a material obtained by heating kaolinite, a clay mineral, at around 700°C to make it amorphous.

[0039] The composition of the alkaline solution and the filler may be appropriately determined, and the amount of the alkaline solution may be 20% by mass to 50% by mass, or 30% by mass to 50% by mass, based on the total amount of the alkaline solution and the filler. Meanwhile, the amount of the filler may be 50% by mass to 80% by mass, or 50% by mass to 70% by mass, based on the total amount of the precursor. When an additive is used, the amount of the additive may be, for example, 0.001% by mass to 10% by mass, 0.01% by mass to 10% by mass, or 0.1% by mass to 10% by mass.

[0040] When forming the precursor 112a, aggregates (fine aggregates, coarse aggregates) such as sand, gravel, and crushed stone used in mortar and concrete may be added separately.

[0041] The obtained precursor 112a is cast into the space 124 in a state of showing fluidity (FIG. 11(B)). Subsequently, the positive electrode 114 (or the negative electrode 116) is placed after or before the precursor 112a hardens (FIG. 11(C)), and the precursor 112a is further added (FIG. 11(D)). Then, the negative electrode 116 (or the positive electrode 114) is placed after or before the precursor 112a hardens (FIG. 12(A)). At this time, in order to prevent contact between the positive electrode 114 and the negative electrode 116, a spacer 126 may be placed between the positive electrode 114 and the negative electrode 116. When the spacer 126 contains a geopolymer, a geopolymer obtained by casting and hardening the precursor 112a into a form having the shape of the spacer 126 may be separately prepared, and this may be placed on the positive electrode 114 (or the negative electrode 116).

[0042] Thereafter, the precursor 112a is cast (FIG. 12(B)), and the reinforcing bar 118 is placed after or before the precursor 112a hardens (FIG. 12(C)). At this time, in order to prevent contact between the positive electrode 114 or the negative electrode 116 and the reinforcing bar 118, a spacer 128 may be placed on the positive electrode 114 or the negative electrode 116, similar to the spacer 126. Thereafter, the precursor 112a is cast on the reinforcing bar 118 and hardened, thereby obtaining a foundation 110 having the positive electrode 114, the negative electrode 116, and the reinforcing bar 118 embedded in the geopolymer 112.

[0043] Here, in order to expose the terminals 114a, 116a from the geopolymer 112, as shown in FIG. 13(A) and the schematic diagram of the end surface along the dashed line CC' in FIG. 13(A) (FIG. 13(B)), a mask material 136 may be placed on the terminals 114a, 116a before the precursor 112a is cast or before the precursor 112a hardens. The mask material 136 may be formed of metal such as iron, aluminum, or stainless steel, or wood or reinforced plastic. By removing the mask material 136 after the precursor 112a hardens, the terminals 114a, 116a can be exposed from the geopolymer 112. The positive electrode 114 and the negative electrode 116 are electrically connected to the power conditioner 150 using these exposed parts. In addition, in order to make it easier to remove the mask material 136, a release agent (mold release agent) or a hardening retarder may be applied in advance to the surface of the mask material 136.

[0044] When the foundation 110 is formed so that the main surfaces of the positive electrode 114 and the negative electrode 116 are inclined from the upper surface of the foundation 110, the positive electrode 114, the negative electrode 116, and the reinforcing bar 118 are arranged in advance in the space 124 as shown in FIG. 14. At this time, insulating pillars 144, 146 may be used to arrange the positive electrode 114, the negative electrode 116, and the reinforcing bar 118 so that they do not contact each other. This allows the positive electrode 114, the negative electrode 116, and the reinforcing bar 118 to be stably arranged in the space 124. Thereafter, the precursor 112a is cast in the space 124 and hardened to obtain the foundation 110. When the pillars 144, 146 are used, they are also included in the foundation 110 as components.

[0045] When the geopolymer 112 is used to provide the column 104 with a storage function, as shown in FIG. 15(A), the column main reinforcement 106b is driven into the space 124 in advance, and the column main reinforcement 106b is surrounded by the hoop 106a to form a reinforcing bar unit that constitutes the column 104. After that, the foundation 110 is formed, and a formwork 138 is formed on the foundation 110 (FIG. 15(B)). Furthermore, the positive electrode 114 and the negative electrode 116 are arranged so as to be surrounded by the hoop 106a and the column main reinforcement 106b. Although not shown, the hoop 106a may be attached to the column main reinforcement 106b after the positive electrode 114 and the negative electrode 116 are arranged so as to be surrounded by the column main reinforcement 106b. If necessary, a spacer 115 (see FIG. 9(B)) containing a geopolymer obtained by hardening the resin or precursor 112a may be provided between the positive electrode 114 and the negative electrode 116.

[0046] Thereafter, the precursor 112a is poured into the formwork 138 and hardened, and the formwork 138 is removed to construct the support 104 having the electricity storage function (FIG. 16).

[0047] Thereafter, the solar cell array 130 is installed directly on the support 104 or via the roof 102, and the power conditioner 150, the wired charger 140, and the wireless charger 160 are appropriately arranged. Furthermore, the positive electrode 114 and the negative electrode 116 of the foundation 110, the positive electrode 114 and the negative electrode 116 of the support 104, the solar cell array 130, the wired charger 140, and the wireless charger 160 are connected to the power conditioner 150, thereby completing the construction of the charging system 100.

[0048] As described above, in this method, fly ash, slag also called iron and steel slag, sewage sludge, silica fume, rice husk ash, general incineration ash, metakaolin, clay, etc. can be used as the filler. Since these fillers are types of so-called industrial waste, the construction method of the charging system 100 according to the embodiment of the present invention can be positioned as one tool for effectively utilizing industrial waste.

[0049] Furthermore, this method does not require a separate storage device, and the base 110 and the support pole 104 themselves function as storage devices. Since the base 110 and the support pole 104 are charged by solar power generation during the day, it is possible to obtain power from the charging system 100 even in a situation where power is not supplied from the commercial power system.

[0050] The above-described embodiments of the present invention may be combined as appropriate as long as they are not mutually inconsistent. Any embodiment in which a person skilled in the art appropriately adds or deletes components or modifies the design based on each embodiment is also included in the scope of the present invention as long as it includes the gist of the present invention.

[0051] Even if there are other effects and advantages different from those brought about by the respective embodiments described above, those which are clear from the description in this specification or which can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0052] 100: charging system, 102: roof, 104: support, 106a: tie, 106b: column main bar, 110: foundation, 112: geopolymer, 112a: precursor, 114: positive electrode, 114a: terminal, 115: spacer, 116: negative electrode, 116a: terminal, 118: reinforcing bar, 118a: hanging material, 118b: main bar, 120: concrete, 126: spacer, 128: spacer, 130: solar cell array, 132: frame, 134: solar cell module, 136: mask material, 138: formwork, 140: wired charger, 142: power cable, 144: pillar, 146: pillar, 150: power conditioner, 152: distribution board, 160: wireless charger

Claims

1. a positive electrode, a negative electrode opposite the positive electrode, and a base including a geopolymer embedding at least a portion of the positive electrode and at least a portion of the negative electrode; a solar array on the foundation; and a charger electrically connected to the solar cell array, the positive electrode, and the negative electrode; A charging system in which, when a vehicle to be charged is parked on the base, power stored in the base is supplied to the vehicle by the charger.

2. The charging system of claim 1 , wherein the charger includes a power cable that connects to a vehicle.

3. The charging system of claim 1 , wherein the charger is a wireless charger disposed on the base.

4. It is also equipped with a power conditioner. The charging system according to claim 1 , wherein the charger is electrically connected to the solar cell array, the positive electrode, and the negative electrode via the power conditioner.

5. a pair of support columns between the foundation and the solar array; At least one of the pair of columns is Second Positive Electrode a second negative electrode facing the second positive electrode; and a geopolymer embedding at least a portion of the second positive electrode and at least a portion of the second negative electrode; The charging system according to claim 1 , wherein the solar cell array is electrically connected to the second positive electrode and the second negative electrode.

6. The geopolymer comprises an additive; 2. The charging system of claim 1, wherein the additive is a metal ion or a material that is ionized to provide a cation.

7. The charging system of claim 1 , wherein the positive electrode and the negative electrode comprise different metals.

8. The charging system of claim 5 , wherein the second positive electrode and the second negative electrode comprise different metals.

9. 10. The charging system of claim 1, wherein the foundation further comprises a plurality of rebars embedded in the geopolymer.

10. At least one of the pair of columns further includes a plurality of column main reinforcements and a plurality of tie bars; The charging system according to claim 5 , wherein the second positive electrode and the second negative electrode are surrounded by the plurality of column main reinforcements and the plurality of tie bars.

11. A charging system as described in claim 1, wherein the solar cell array is mounted on a roof covering the foundation.

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