Power generation module

Abstract

This power generation module comprises: a first board and a second board that face each other; a first power generation element disposed on the first board; a first interconnection (22) electrically connected to the first power generation element; and a gas barrier first encapsulation member (50) that is disposed between the first board and the second board to encapsulate an interior space between the first board and the second board. The first power generation element has a first electrode (151) disposed on the first board, a first power generation layer disposed on the first electrode (151), and a second electrode disposed on the first power generation layer. The first encapsulation member (50) surrounds the outer periphery of the first power generation layer, the first electrode (151) extends to the outside of the first encapsulation member (50), and the first interconnection (22) is electrically connected to the first electrode (151) on the outside of the first encapsulation member (50) and between the first board and the second board.

Description

Power generation module

[0001] The present disclosure relates to a power generation module used for building integrated photovoltaics (BIPV).

[0002] Building integrated photovoltaics (BIPV) using a power generation module as a building window has been conventionally studied. In a power generation module, it is common to seal the periphery of the module in order to protect the solar cell elements inside. As shown in Patent Document 1, in a solar cell using perovskite, since the perovskite material deteriorates due to oxygen, it is necessary to suppress the intrusion of oxygen.

[0003] International Publication No. 2021 / 251048

[0004] Since the gas barrier material for suppressing the intrusion of oxygen is a hard substance among resin members, if a wiring for taking out the generated electricity to the outside penetrates through the sealing member made of the gas barrier material, gaps are likely to occur and the sealing performance deteriorates.

[0005] The present disclosure provides a power generation module that suppresses a decrease in sealing performance.

[0006] The power generation module of the present disclosure includes a first substrate and a second substrate facing each other, a first power generation element disposed on the first substrate, a first wiring electrically connected to the first power generation element, and a gas barrier first sealing member disposed between the first substrate and the second substrate and sealing the internal space between the first substrate and the second substrate. The first power generation element has a first electrode disposed on the first substrate, a first power generation layer disposed on the first electrode, and a second electrode disposed on the first power generation layer. The first sealing member surrounds the outer periphery of the first power generation layer, the first electrode extends to the outside of the first sealing member, and the first wiring is electrically connected outside the first sealing member at the first electrode and between the first substrate and the second substrate.

[0007] According to the power generation module of the present disclosure, a power generation module that suppresses a decrease in sealing performance is provided.

[0008] Schematic plan view of the power generation module of Embodiment 1 Schematic cross-sectional view of the power generation module of Embodiment 1 along line II-II Schematic plan view of the power generation element in the power generation module of Embodiment 1 Enlarged front view of a part of the power generation element in Figure 3 Enlarged cross-sectional view of the power generation element along line VIA-VIA in Figure 4 Enlarged cross-sectional view of the line VIB-VIB in Figure 4 Enlarged cross-sectional view of region Z1 in the power generation module of Embodiment 2 Enlarged cross-sectional view of region Z2 in the power generation module of Embodiment 2 Schematic plan view of the power generation module of Embodiment 2 Schematic cross-sectional view of the power generation module of Embodiment 2 along line X-X in Figure 9 Enlarged cross-sectional view of region Z3 in the power generation module of Embodiment 10 Enlarged cross-sectional view of region Z4 in the power generation module of Embodiment 10 Longitudinal cross-sectional view of the power generation module of Embodiment 9 viewed from direction A Cross-sectional view of a modified power generation module of Embodiment 2 corresponding to Figure 12 Schematic plan view of the power generation module of Embodiment 3 Cross-sectional view of the power generation module of Embodiment 3 corresponding to Figure 7 Schematic plan view of a modified power generation module of Embodiment 3

[0009] Embodiments of this disclosure will be described below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., terms including "up," "down," "right," and "left") will be used as needed. The use of these terms is for the purpose of facilitating the understanding of this disclosure with reference to the drawings, and the meaning of these terms does not limit the technical scope of this disclosure or the manner in which the power generation modules relating to this disclosure are used. Furthermore, the following description is essentially illustrative and is not intended to limit this disclosure, its applications, or its uses. In addition, the drawings are schematic, and the proportions of the dimensions, etc., do not necessarily correspond to those of reality.

[0010] In this specification, "electrically connected" means at least one of the following: that an electric current can be conducted between the multiple components; that the multiple components are capacitively coupled; and that the multiple components are electromagnetically coupled.

[0011] (Embodiment 1) This embodiment will be described below with reference to the drawings.

[0012] [1. Configuration of the Power Generation Module] The basic configuration of the power generation module 10 will be explained with reference to Figures 1 and 2. Figure 1 is a schematic plan view of the power generation module 10. Figure 2 is a schematic cross-sectional view of the power generation module in Figure 1 along line II-II.

[0013] As shown in Figures 1 and 2, the power generation module 10 comprises a first substrate 11, a second substrate 12, wiring 21 and 22, a first sealing member 50, and a power generation element 100.

[0014] The power generation module 10 can be used, for example, as a building material for a window or balcony in a building, where ambient light is incident from the first substrate 11 side.

[0015] The Z direction shown in Figures 1 and 2 corresponds to the thickness direction of the power generation module 10. The thickness direction of the power generation module 10 is, for example, the stacking direction of the two substrates 11 and 12, or the stacking direction of the solar cell layers included in the power generation module 10. Furthermore, the directions that intersect (in this case are orthogonal) with each other in a plane perpendicular to the Z direction are defined as the X direction and the Y direction. The Y direction may be, for example, the height direction of the window, and the X direction may be, for example, the width direction of the window.

[0016] The first substrate 11 and the second substrate 12 are translucent. "Translucency" means the ability to transmit visible light. The first substrate 11 and the second substrate 12 are, for example, rectangular glass substrates (tempered glass substrates) for building materials, and have a thickness of, for example, 2 mm or more. As shown in Figure 1, the second substrate 12 may be omitted from the plan view of the power generation module 10 or a part thereof for the sake of clarity.

[0017] As shown in Figure 2, the first substrate 11 and the second substrate 12 are arranged facing each other in the Z direction. The peripheral edge of the solar cell layer PV of the power generation element 100 is sealed by the first sealing member 50. In a plan view from the Z direction, the first sealing member 50 is located outside the area where the solar cell layer PV of the power generation element 100 is arranged, and the first sealing member 50 surrounds the outer periphery of the solar cell layer PV.

[0018] The first sealing member 50 has gas barrier properties and suppresses the intrusion of air such as oxygen into the area inside the first sealing member 50. Gas barrier properties refer to the difficulty of passing gases such as oxygen and water vapor through (difficulty in permeation), and the higher the gas barrier properties, the less gas can pass through. The first sealing member 50 is placed between the first substrate 11 and the second substrate 12 and seals the internal space between the first substrate 11 and the second substrate 12. By using, for example, ethylene vinyl alcohol copolymer resin (EVOH) or epoxy resin as the first sealing member 50, the intrusion of oxygen can be suppressed. The first sealing member 50 has a Shore D hardness of 40 to 100.

[0019] The power generation element 100 is a solar cell module having a solar cell (power generation unit). The power generation element 100 is located between the first substrate 11 and the second substrate 12. In the example shown in Figure 1, the power generation element 100 is arranged in the space surrounded by the first substrate 11, the second substrate 12, and the first sealing member 50.

[0020] As shown in Figure 2, the power generation module 10 includes a filler material 32 located between the second substrate 12 and the first substrate 11, and between the second substrate 12 and the upper surface of the power generation element 100. The filler material 32 is, for example, polyvinyl butyral (PVB), ethylene vinyl acetate copolymer (EVA), polyolefin (PO), etc. The filler material 32 can further suppress the influence of air on the solar cell layer within the power generation element 100.

[0021] As shown in Figure 1, the power generation module 10 includes a pair of wires 21 and 22. The wires 21 and 22 are, for example, metal wires. The wires 21 and 22 are electrically connected to the power generation element 100 outside the first sealing member 50 between the first substrate 11 and the second substrate 12.

[0022] The wiring 21 comprises a tab wire 41a connected to the power generation element 100 via solder or conductive tape, and a lead wire 41b connected to the tab wire 41a at a connection point 41c by solder or the like. Similarly, the wiring 22 comprises a tab wire 42a connected to the power generation element 100 via solder or conductive tape, and a lead wire 42b connected to the tab wire 42a at a connection point 42c by solder or the like. Note that the wiring 21 may consist of a single tab wire or lead wire for both the tab wire 41a and the lead wire 41b. Similarly, the wiring 22 may consist of a single tab wire or lead wire for both the tab wire 42a and the lead wire 42b.

[0023] In this embodiment, the tab wires 41a, 42a and lead wires 41b, 42b are wires in which a solder layer is applied around a copper wire. The solder layer suppresses the occurrence of rust on the copper wire. Furthermore, when the wiring 21 and 22 are soldered to other components, the solder layer functions as pre-solder. The tab wire 41a is provided on one end of the power generation element 100 in the X direction. The tab wire 42a is provided on the other end of the power generation element 100 in the X direction.

[0024] [2. Structure of the power generation element 100] The structure of the power generation element 100 in the power generation module 10 will be described with reference to Figures 3 to 6. Figure 3 is a schematic plan view of the power generation element 100 in the power generation module 10. Figure 4 is an enlarged plan view of a part of the power generation element 100 in Figure 3. Figure 4 shows an enlarged view of the region 100a shown in Figure 3. Figure 5 is an enlarged cross-sectional view along the line VIA-VIA in Figure 4. Figure 6 is an enlarged cross-sectional view along the line VIB-VIB in Figure 4.

[0025] As shown in Figure 3, the power generation element 100 comprises a power generation unit supported by the first substrate 11, a part of the tab wire 41a, and a part of the tab wire 42a, all located on a light-transmitting first substrate 11. In the example shown in Figure 3, the power generation unit includes a plurality of linear strings 120. The power generation unit is located on a part of the main surface 11s (inner surface) of the first substrate 11.

[0026] The power generation unit includes at least a solar cell layer. As will be described later, the power generation unit has a laminated structure that includes, for example, a pair of transparent electrodes and a solar cell layer located between the pair of transparent electrodes. The laminated structure only needs to be supported by the main surface 11s of the first substrate 11 and does not need to be in direct contact with it.

[0027] Tab wire 41a is located on one end of the first substrate 11. Tab wire 42a is located on the other end of the first substrate 11. Tab wires 41a and 42a are electrically connected to the power generation section.

[0028] Multiple power generation strings 120 are connected in parallel by tab wires 41a and 42a. Here, each string 120 extends along the X direction from one end to the other of the first substrate 11. One end of each string 120 is connected to tab wire 41a, and the other end is connected to tab wire 42a.

[0029] Multiple strings 120 are arranged on the main surface 11s of the first substrate 11, spaced apart from each other in the Y direction. In a plan view from the Z direction, the multiple strings 120 may, for example, extend parallel to each other. In a plan view from the Z direction, the region 130 located between adjacent strings 120 on the main surface 11s of the first substrate 11 is called the "inter-string region".

[0030] As shown in Figures 4 and 5, each of the multiple strings 120 is a solar cell element string having multiple solar cell elements 150 connected in series.

[0031] As shown in Figures 5 and 6, each string 120 has a laminated structure L in which multiple layers, including a transparent conductive layer LE, a solar cell layer PV, and a transparent conductive layer UE, are stacked in the Z direction. These layers are supported on a main surface 11s. In the laminated structure L, the solar cell layer PV is located between the transparent conductive layer LE and the transparent conductive layer UE. The transparent conductive layer LE is located on the first substrate 11 side of the solar cell layer PV. The solar cell layer PV is a thin film type, for example, a laminated film including an n-type semiconductor layer, an i-type semiconductor layer, and a p-type semiconductor layer from the first substrate 11 side. The solar cell layer PV may further include an electron transport layer and / or a hole transport layer, if necessary.

[0032] The transparent conductive layer LE, the solar cell layer PV, and the transparent conductive layer UE are separated for each solar cell element 150. In this example, the solar cell layer PV and the transparent conductive layer UE are separated for each solar cell element 150 by a separation groove 160. The transparent conductive layer LE includes the first electrode 151 of each solar cell element 150. The transparent conductive layer UE includes the second electrode 155 of each solar cell element 150. The first electrode 151 and the second electrode 155 are transparent electrodes. The solar cell layer PV includes the semiconductor layer 153 of each solar cell element 150.

[0033] Each solar cell element 150 has a first electrode 151, a second electrode 155, and a semiconductor layer 153 located between the first electrode 151 and the second electrode 155. The first electrode 151 (or second electrode 155) of the solar cell element 150 located at one end of each string 120 is electrically connected to the tab wire 41a. Similarly, the second electrode 155 (or first electrode 151) of the solar cell element 150 located at the other end of each string 120 is electrically connected to the tab wire 42a.

[0034] The solar cell layer PV (i.e., semiconductor layer 153) is a layer that converts absorbed light into photoelectric energy (photoelectric conversion layer). The solar cell layer PV contains, for example, a perovskite compound (peribskite semiconductor) as a photoelectric conversion material. The perovskite compound has the chemical formula ABX ３This refers to a perovskite crystal structure represented by and a structure having a similar crystal. A is a monovalent cation, B is a divalent cation, and X is a halogen anion. The transparent conductive layer LE and transparent conductive layer UE are translucent metal oxide layers such as indium tin oxide (ITO) or indium zinc oxide (IZO), or a fluorine-doped tin oxide (FTO) layer. The materials of each layer constituting the solar cell element are not limited to those described above, and known materials may be used.

[0035] Next, with reference to Figures 7 and 8, the positional relationship between the tab lines 41a and 42a of the power generation module 10 and the first sealing member will be further explained. Figure 7 is an enlarged cross-sectional view of region Z1 in the power generation module 10 of Figure 2. Figure 8 is an enlarged cross-sectional view of region Z2 in the power generation module 10 of Figure 2.

[0036] The first electrode 151 has a first extension portion 161 and a second extension portion 162 that protrude in the X direction from the semiconductor layer 153 in a plan view. The first extension portion 161 is a region in which the first electrode 151 protrudes in the -X direction relative to the semiconductor layer 153 and extends beyond the first sealing member 50. The second extension portion 162 is a region in which the first electrode 151 protrudes in the +X direction relative to the semiconductor layer 153 and extends beyond the first sealing member 50. In this embodiment, each extension portion 161, 162 has a band shape that extends along the Y direction in a plan view.

[0037] One side of the first sealing member 50 on the -X direction is positioned on the first expansion portion 161, sealing the space between the first expansion portion 161 and the second substrate 12. Similarly, one side of the first sealing member 50 on the +X direction is positioned on the second expansion portion 162, sealing the space between the second expansion portion 162 and the second substrate 12.

[0038] The first extension 161 becomes the positive electrode of the power generation module 10. The second extension 162 becomes the negative electrode of the power generation module 10.

[0039] In this embodiment, the tab wire 41a of the positive electrode extraction wiring 21 is connected to the outer portion of the first sealing member 50 in each first expansion portion 161 over substantially the entire length of each first expansion portion 161 in the Y direction. Similarly, the tab wire 42a of the negative electrode extraction wiring 22 is connected to the outer portion of the first sealing member 50 in each second expansion portion 162 over substantially the entire length of each second expansion portion 162 in the Y direction.

[0040] As described above, the positive electrode wiring 21 and the negative electrode wiring 22 are electrically connected to the power generation element 100 on the outside of the first sealing member 50, so there is no need to provide through holes for wiring extraction in the first sealing member 50, and a decrease in the sealing performance of the first sealing member 50 can be suppressed. The first sealing member 50 is placed on the first electrode 151 of the power generation element 100, and the thickness of the first electrode 151 is much smaller than the thickness of the wirings 21 and 22, and the adhesion between the first electrode 151 and the first sealing member 50 is high, so it is possible to suppress the intrusion of air from the interface between the first electrode 151 and the first sealing member 50.

[0041] [4. Effects, etc.] As described above, the power generation module 10 comprises a first substrate 11 and a second substrate 12 facing each other, a power generation element 100 disposed on the first substrate 11, wirings 21 and 22 electrically connected to the power generation element 100, and a gas barrier first sealing member 50 disposed between the first substrate 11 and the second substrate 12 to seal the internal space between the first substrate 11 and the second substrate 12. The power generation element 100 has a first electrode 151 disposed on the first substrate 11, a solar cell layer PV disposed on the first electrode 151, and a second electrode 155 disposed on the solar cell layer PV. The first sealing member 50 surrounds the outer periphery of the solar cell layer PV, the first electrode 151 extends to the outside of the first sealing member 50, and the wirings 21 and 22 are electrically connected at the portion of the first electrode 151 outside the first sealing member 50.

[0042] Since the wirings 21 and 22 are electrically connected to the power generation element 100 on the outside of the first sealing member 50, there is no need to provide through holes for wiring extraction in the first sealing member 50, and a decrease in the sealing performance of the first sealing member 50 can be suppressed.

[0043] (Embodiment 2) Next, referring to FIGS. 9 to 12, the power generation module 10A of Embodiment 2 will be described. FIG. 9 is a schematic plan view of the power generation module 10A of Embodiment 2. FIG. 10 is a schematic cross-sectional view taken along the X-X line of the power generation module of FIG. 9. FIG. 11 is an enlarged cross-sectional view of the region Z3 in the power generation module 10A of FIG. 10. FIG. 12 is an enlarged cross-sectional view of the region Z4 in the power generation module 10A of FIG. 10. In Embodiment 2, the same reference numerals are given to the components common to Embodiment 1, and the following description will focus on the differences.

[0044] The power generation module 10 in Embodiment 1 included the first sealing member 50, but the power generation module 10A in Embodiment 2 includes the second sealing member 52 in addition to the first sealing member 50.

[0045] At the peripheral edges of the first substrate 11 and the second substrate 12, it is sealed by the second sealing member 52. In a plan view seen from the Z direction, the second sealing member 52 is located outside the region where the first sealing member 50 is disposed and the region where the power generation element 100 is disposed, and surrounds the outer periphery of the first sealing member 50.

[0046] Since the second sealing member 52 has a higher moisture barrier property than the first sealing member 50, it is possible to suppress the intrusion of water droplets and water vapor into the internal space of the power generation module 10A. The second sealing member 52 is, for example, a thermoplastic elastomer such as butyl rubber or silicone rubber. The second sealing member 52 has a Shore A hardness of 20 or more and 90 or less.

[0047] The tab lines 41a and 42a are electrically connected to the power generation element 100 within the space surrounded by the first substrate 11, the second substrate 12, and the second sealing member 52. Thereby, the connection portion between the tab lines 41a, 42a and the power generation element 100 can be protected from moisture. The lead lines 41b and 42b are drawn out from the above space through the second sealing member 52 to the outside.

[0048] The connection point 41c between the tab wire 41a and the lead wire 41b, and the connection point 42c between the tab wire 42a and the lead wire 42b, are each located outside the first sealing member 50 but inside the second sealing member 52. This protects the respective connection points 41c and 42c from moisture.

[0049] Refer to Figure 13. Figure 13 is a longitudinal cross-sectional view taken from direction A in Figure 9.

[0050] As shown in Figure 13, the second sealing member 52 has a through hole 53 that communicates from the internal space of the power generation module 10 to the outside, and the wiring 21 and 22 pass through the second sealing member 52 from within the area surrounded by the second sealing member 52 to the outside of the second sealing member 52. The wiring 21 and 22 that extend to the outside of the second sealing member 52 are connected, for example, to terminal boxes provided on the positive and negative sides, respectively.

[0051] Since the second sealing member 52 is made of a softer material than the first sealing member 50, it has good adhesion between the through hole 53 and the wiring 21 and 22, so it can suppress the intrusion of water droplets and water vapor through the interface between the through hole 53 and the wiring 21 and 22.

[0052] As described above, the power generation module 10A of the second embodiment includes a second sealing member 52 arranged along the outer edges of the first substrate 11 and the second substrate 12. The second sealing member 52 has higher moisture barrier properties than the first sealing member 50. The second sealing member 52 can suppress the intrusion of water droplets and water vapor into the power generation module 10A, so the power generation module 10A can be used in environments exposed to rain or high humidity.

[0053] Furthermore, the power generation module 10A includes a second sealing member 52 arranged along the outer edges of the first substrate 11 and the second substrate 12, and the second sealing member 52 has a lower modulus of elasticity than the first sealing member 50. As a result, the second sealing member 52 is softer than the first sealing member 50, so even if the wiring 21 and 22 are passed through the second sealing member 52, the adhesion between the second sealing member 52 and the wiring 21 and 22 is good, and the intrusion of water droplets and water vapor from the interface between the second sealing member 52 and the wiring 21 and 22 can be suppressed.

[0054] The power generation module 10A may also be provided with an additional sealing member inside the first sealing member 50. It is desirable that the sealing member inside the first sealing member 50 be in close contact with the first sealing member 50 and formed to surround the solar cell. For example, the sealing member inside the first sealing member 50 can be made of the same material as the second sealing member 52.

[0055] The space between the first sealing member 50 and the second sealing member may be filled by either the first sealing member 50 or the second sealing member 52, meaning that the first sealing member 50 and the second sealing member 52 may be in contact with each other. In this case, it is desirable that the connection points (connection points 41c, 42c) between the tab wire and the lead wire are located outside the first sealing member 50 and inside the second sealing member 52.

[0056] Furthermore, there may be a distance between the first sealing member 50 and the second sealing member. In this case, the space between the first sealing member 50 and the second sealing member may be filled with an air layer. Alternatively, the space between the first sealing member 50 and the second sealing member may be filled with a material other than either the first sealing member 50 or the second sealing member 52.

[0057] Next, with reference to Figure 14, a modified power generation module 10B, which is a modified version of the power generation module 10A of Embodiment 2, will be described. Figure 14 is a cross-sectional view of the power generation module 10B, a modified version of Embodiment 2, corresponding to Figure 12.

[0058] The difference between power generation module 10B and power generation module 10A is that the first extension portion 161 and the second extension portion 162 of the first electrode 151 each extend to the second sealing member 52. The configuration of power generation module 10B other than this point is the same as that of power generation module 10A, so the explanation will be omitted.

[0059] The first extension portion 161 and the second extension portion 162 of the first electrode 151 extend to the vicinity of the outer edge of the first substrate 11, and the second sealing member 52 may be placed on the outer ends of the first extension portion 161 and the second extension portion 162 and on the peripheral edge of the first substrate 11. Since the first electrode 151 is formed over the entire surface of the first substrate 11 and then the unnecessary parts are removed by laser, the larger the area of ​​the first extension portion 161 and the second extension portion 162, the shorter the time required to remove the unnecessary parts. This shortens the manufacturing time of the power generation module 10B.

[0060] (Embodiment 3) Next, the power generation module 10C of Embodiment 3 will be described with reference to Figures 15 and 16. Figure 15 is a schematic plan view of the power generation module 10C of Embodiment 3. Figure 16 is a cross-sectional view of the power generation module 10C of Embodiment 3, corresponding to Figure 7. In Embodiment 3, the same reference numerals are used for components common to Embodiment 1, and the differences will be described below.

[0061] In Embodiment 1, the power generation module 10 was equipped with one power generation element 100, but in Embodiment 3, the power generation module 10C is equipped with multiple power generation elements. For example, the power generation module 10C is equipped with two power generation elements 100 and 100C. The configuration of power generation element 100C is the same as that of power generation element 100, so its description is omitted.

[0062] The power generation element 100C, like the power generation element 100, has a plurality of solar cell elements 150c (layered structure Lc). Each solar cell element 150c has a first electrode 151c (transparent conductive layer LEc), a second electrode 155c (transparent conductive layer UEc), and a semiconductor layer 153c (solar cell layer PVc) located between the first electrode 151c and the second electrode 155c.

[0063] The first sealing member 50 is positioned between the first substrate 11 and the second substrate 12 so as to surround the outer periphery of the solar cell layer PV of the power generation element 100 and the solar cell layer PVc of the power generation element 100C.

[0064] The power generation module 10C of Embodiment 3 further comprises a power generation element 100C disposed on a first substrate 11, the power generation element 100C having a first electrode 151c disposed on the first substrate 11, a solar cell layer PVc disposed on the first electrode 151c, and a second electrode 155c disposed on the solar cell layer PVc. The first sealing member 50 surrounds the outer periphery of the solar cell layer PV and the solar cell layer PVc, and the first electrode 151c extends to the outside of the first sealing member 50. The wirings 21 and 22 are electrically connected at the portion of the first electrode 151c outside the first sealing member 50.

[0065] The power generation module 10C of Embodiment 3 also has the same effects as the power generation module 10 of Embodiment 1.

[0066] Next, with reference to Figure 17, a modified power generation module 10D of Embodiment 3 will be described. Figure 17 is a schematic plan view of the modified power generation module 10D of Embodiment 3. In the modified embodiment of Embodiment 3, components common to Embodiment 3 are denoted by the same reference numerals, and the differences will be described below.

[0067] In Embodiment 3, the wiring 21 and 22 are common to the two power generation elements 100 and 100C, and the power generation elements 100 and 100C were connected in parallel. However, in the modified embodiment of Embodiment 3, the power generation module 10D has wiring 21, 22, 21d, and 22d connected individually to the power generation elements 100 and 100C, respectively. The configuration of wiring 21d and 22d is the same as that of wiring 21 and 22, so a description will be omitted.

[0068] The power generation module 10D of Embodiment 3 further comprises a power generation element 100C disposed on a first substrate 11, and wirings 21d and 22d electrically connected to the power generation element 100C. The power generation element 100C has a first electrode 151c disposed on the first substrate 11, a solar cell layer PVc disposed on the first electrode 151c, and a second electrode 155c disposed on the solar cell layer PVc. The first sealing member 50 surrounds the outer periphery of the solar cell layer PV and the solar cell layer PVc, and the first electrode 151c extends to the outside of the first sealing member 50. The wirings 21d and 22d are electrically connected at the portion of the first electrode 151c outside the first sealing member 50.

[0069] The power generation module 10D, a modified example of Embodiment 3, also has the same effects as the power generation module 10 of Embodiment 1.

[0070] (Other Embodiments) As described above, the above embodiments have been explained as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited thereto and can be applied to embodiments that have been modified, replaced, added, or omitted as appropriate. Therefore, other embodiments are described below as examples.

[0071] (Outline of Embodiments) (1) The power generation module of the present disclosure comprises a first substrate and a second substrate facing each other, a first power generation element disposed on the first substrate, a first wiring electrically connected to the first power generation element, and a first gas barrier sealing member disposed between the first substrate and the second substrate to seal the internal space between the first substrate and the second substrate. The first power generation element has a first electrode disposed on the first substrate, a first power generation layer disposed on the first electrode, and a second electrode disposed on the first power generation layer. The first sealing member surrounds the outer periphery of the first power generation layer, the first electrode extends to the outside of the first sealing member, and the first wiring is electrically connected to the outside of the first sealing member at the first electrode and between the first substrate and the second substrate.

[0072] (2) In the power generation module of (1), the first sealing member comprises an ethylene vinyl alcohol copolymer resin or an epoxy resin.

[0073] (3) In the power generation module of (1) or (2), the first sealing member has a Shore D hardness of 40 or more and 100 or less.

[0074] (4) In any of the power generation modules described in (1) to (3), the power generation module includes a second sealing member arranged along the outer edges of the first substrate and the second substrate.

[0075] (5) In the power generation module of (4), the second sealing member has higher moisture barrier properties than the first sealing member.

[0076] (6) In the power generation module of (4), the second sealing member has a lower elastic modulus than the first sealing member.

[0077] (7) In the power generation module of (4), the second sealing member includes butyl resin.

[0078] (8) In any of the power generation modules from (4) to (7), the first wiring comprises a tab wire electrically connected to the outer portion of the first sealing member at the first electrode, and a lead wire connected to the tab wire. The connection point between the tab wire and the lead wire is located outside the first sealing member and inside the second sealing member.

[0079] (9) In the power generation module of (8), the first sealing member and the second sealing member are provided at a distance from each other.

[0080] In the power generation module of (10)(4), the first wiring has a tab wire that is electrically connected to the outer portion of the first sealing member at the first electrode, and a lead wire that is connected to the tab wire, and the connection point between the tab wire and the lead wire is located outside the first sealing member and inside the second sealing member.

[0081] (11) In the power generation module of (10), the first sealing member and the second sealing member are provided in contact with each other.

[0082] (12) In any of the power generation modules described in (1) to (11), the power generation module includes a second power generation element disposed on a first substrate. The second power generation element has a third electrode disposed on the first substrate, a second power generation layer disposed on the first electrode, and a fourth electrode disposed on the first power generation layer. The first sealing member surrounds the outer periphery of the first power generation layer and the second power generation layer, and the third electrode extends to the outside of the first sealing member. The first wiring is electrically connected at the portion of the third electrode that is outside the first sealing member.

[0083] (13) In any of the power generation modules of (1) to (11), the power generation module comprises a second power generation element disposed on a first substrate and a second wiring electrically connected to the second power generation element. The second power generation element has a third electrode disposed on the first substrate, a second power generation layer disposed on the first electrode, and a fourth electrode disposed on the first power generation layer. The first sealing member surrounds the outer periphery of the first power generation layer and the second power generation layer, and the third electrode extends to the outside of the first sealing member. The second wiring is electrically connected to the portion of the third electrode that is outside the first sealing member.

[0084] This disclosure is useful for power generation modules used in building-integrated photovoltaic power generation.

[0085] 10, 10A, 10B, 10C, 10D Power generation module 11 First substrate 12 Second substrate 13 Central region 21, 22 Wiring 24 Conductive material 32 Filler 41a Tab wire 41b Lead wire 41c Connection point (connection location) 42a Tab wire 42b Lead wire 42c Connection point (connection location) 50 First sealing member 52 Second sealing member 53 Through hole 100, 100C Power generation element 120 String 150, 150c Solar cell element 151, 151c First electrode 153, 153c Semiconductor layer 155, 155c Second electrode 160 Separation groove 161 First expansion section 162 Second expansion section L, Lc Laminated structure LE, LEc Transparent conductive layer PV, PVc Solar cell layer UE, UEc transparent conductive layer

Claims

1. A power generation module comprising: a first substrate and a second substrate facing each other; a first power generation element disposed on the first substrate; a first wiring electrically connected to the first power generation element; and a first gas barrier sealing member disposed between the first substrate and the second substrate to seal the internal space between the first substrate and the second substrate, wherein the first power generation element has a first electrode disposed on the first substrate; a first power generation layer disposed on the first electrode; and a second electrode disposed on the first power generation layer, the first sealing member surrounds the outer periphery of the first power generation layer, the first electrode extends to the outside of the first sealing member, and the first wiring is electrically connected to the outside of the first sealing member at the first electrode and between the first substrate and the second substrate.

2. The power generation module according to claim 1, wherein the first sealing member comprises an ethylene vinyl alcohol copolymer resin or an epoxy resin.

3. The power generation module according to claim 1, wherein the first sealing member has a Shore D hardness of 40 or more and 100 or less.

4. The power generation module according to claim 1, further comprising a second sealing member arranged along the outer edges of the first substrate and the second substrate.

5. The power generation module according to claim 4, wherein the second sealing member has higher moisture barrier properties than the first sealing member.

6. The power generation module according to claim 4, wherein the second sealing member has a lower elastic modulus than the first sealing member.

7. The power generation module according to claim 4, wherein the second sealing member comprises butyl resin.

8. The power generation module according to claim 4, wherein the first wiring comprises a tab wire electrically connected to the outer portion of the first sealing member at the first electrode, and a lead wire connected to the tab wire, and the connection point between the tab wire and the lead wire is located outside the first sealing member and inside the second sealing member.

9. The power generation module according to claim 8, wherein the first sealing member and the second sealing member are provided at a distance from each other.

10. The power generation module according to claim 4, wherein the first wiring comprises a tab wire electrically connected to the outer portion of the first sealing member at the first electrode, and a lead wire connected to the tab wire, and the connection point between the tab wire and the lead wire is located outside the first sealing member and inside the second sealing member.

11. The power generation module according to claim 10, wherein the first sealing member and the second sealing member are provided to be in contact with each other.

12. The power generation module according to claim 1, comprising a second power generation element disposed on the first substrate, the second power generation element having a third electrode disposed on the first substrate, a second power generation layer disposed on the first electrode, and a fourth electrode disposed on the first power generation layer, the first sealing member surrounding the outer periphery of the first power generation layer and the second power generation layer, the third electrode extending to the outside of the first sealing member, and the first wiring being electrically connected at the portion of the third electrode outside the first sealing member.

13. The power generation module according to claim 1, comprising: a second power generation element disposed on the first substrate; and a second wiring electrically connected to the second power generation element, wherein the second power generation element has a third electrode disposed on the first substrate; a second power generation layer disposed on the first electrode; and a fourth electrode disposed on the first power generation layer, the first sealing member surrounds the outer periphery of the first power generation layer and the second power generation layer; the third electrode extends to the outside of the first sealing member; and the second wiring is electrically connected at the portion of the third electrode that is outside the first sealing member.

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