Photovoltaic power generation system

Abstract

A photovoltaic power generation system (100) includes a first structure (110) and a second structure (120). The first structure (110) includes a plurality of first photoelectric converters (111). The second structure (120) includes at least one second photoelectric conversion body (121). Each of the plurality of first photoelectric conversion bodies (111) extends in the longitudinal direction of the first direction (151). The direction in which the plurality of first photoelectric conversion bodies (111) are arranged is a second direction (152) orthogonal to the first direction (151). When viewed from a third direction (153) orthogonal to the first direction (151) and the second direction (152), at least a portion of the at least one second photoelectric conversion body (121) can overlap at least a portion of the plurality of first photoelectric conversion bodies (111).

Description

Technical Field

[0001] The present disclosure relates to a photovoltaic power generation system. Background Art

[0002] Photovoltaic power generation is a well-known method of generating electricity. Photovoltaic power generation utilizes a photoelectric converter. Patent Document 1 describes a photovoltaic power generation system comprising a substrate and a photoelectric converter supported by the substrate. The substrate is implemented using at least a portion of window glass.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 4-360983

[0006] Patent Document 2: International Publication No. 2020 / 208854 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] The present disclosure provides a technology suitable for ensuring the power generated by a photovoltaic power generation system.

[0009] Means for solving problems

[0010] The present disclosure provides a photovoltaic power generation system comprising: a first structure having a plurality of first photoelectric converters; and a second structure having at least one second photoelectric converter; the plurality of first photoelectric converters each extend in a first direction as a length direction, the plurality of first photoelectric converters are arranged in a second direction orthogonal to the first direction, and when viewed from a third direction orthogonal to the first direction and the second direction, at least a portion of the at least one second photoelectric converter can overlap with at least a portion of the plurality of first photoelectric converters.

[0011] Effects of the Invention

[0012] The technology disclosed herein is suitable for ensuring the generated power of a photovoltaic power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1A This is an explanatory diagram of the photovoltaic power generation system according to the first embodiment.

[0014] Figure 1B This is an explanatory diagram of the photovoltaic power generation system according to the first embodiment.

[0015] Figure 1C This is an explanatory diagram of the photovoltaic power generation system according to the first embodiment.

[0016] Figure 2A This is a diagram showing the photovoltaic power generation system according to the first embodiment as viewed from an orthogonal direction.

[0017] Figure 2B This is a diagram showing the photovoltaic power generation system according to the first embodiment as viewed from an orthogonal direction.

[0018] Figure 3 This is a cross-sectional view of the photovoltaic power generation system according to the first embodiment.

[0019] Figure 4 It is an explanatory diagram of the arrangement of a plurality of first photoelectric converters.

[0020] Figure 5 This is a diagram illustrating the electrical connection of a plurality of first photoelectric converters.

[0021] Figure 6 It is an explanatory diagram of the arrangement of a plurality of second photoelectric converters.

[0022] Figure 7 This is a diagram illustrating the electrical connection of a plurality of second photoelectric converters.

[0023] Figure 8A It is a plan view of a first structural example using an integrated solar cell module.

[0024] Figure 8B It is a cross-sectional view of a first structural example using an integrated solar cell module.

[0025] Figure 8C It is an explanatory diagram of the damage avoidance effect of the first structural example.

[0026] Figure 9A It is a plan view of a second structural example using an integrated solar cell module.

[0027] Figure 9B It is a cross-sectional view of a second structural example using an integrated solar cell module.

[0028] Figure 9C It is a cross-sectional view of a second structural example using an integrated solar cell module.

[0029] Figure 9D It is a cross-sectional view of a second structural example using an integrated solar cell module.

[0030] Figure 9E It is an explanatory diagram of the electrical connection of the light absorbing layer in the second structural example.

[0031] Figure 9F It is an explanatory diagram of the damage avoidance effect of the second structural example.

[0032] Figure 10A It is a plan view of a third structural example using an integrated solar cell module.

[0033] Figure 10B It will Figure 10A The integrated solar cell module shown is a cross-sectional view taken along line XB-XB and viewed in the direction of the arrow.

[0034] Figure 10C is a cross-sectional view showing the cross-sectional structure of the third structural example, and is a cross-sectional view showing the cross-sectional structure of the third structural example. Figure 9D Cross-sectional view of the corresponding section.

[0035] Figure 11A is a cross-sectional view showing the cross-sectional structure of the fourth structural example, and is a cross-sectional view showing the cross-sectional structure of the fourth structural example. Figure 9C and Figure 10B Cross-sectional view of the corresponding section.

[0036] Figure 11B is a cross-sectional view showing the cross-sectional structure of the fourth structural example, and is a cross-sectional view showing the cross-sectional structure of the fourth structural example. Figure 9D and Figure 10C Cross-sectional view of the corresponding section.

[0037] Figure 12A is a cross-sectional view showing the cross-sectional structure of the fifth structural example, and is a cross-sectional view showing the cross-sectional structure of the fifth structural example. Figure 9C 、 Figure 10B and Figure 11A Cross-sectional view of the corresponding section.

[0038] Figure 12B is a cross-sectional view showing the cross-sectional structure of the fifth structural example, and is a cross-sectional view showing the cross-sectional structure of the fifth structural example. Figure 9D 、 Figure 10C and Figure 11B Cross-sectional view of the corresponding section.

[0039] Figure 12C It is an explanatory diagram of the electrical connection of the light absorbing layer in the fifth structural example.

[0040] Figure 12D It is an explanatory diagram of the arrangement of the prescribed structure in the fifth structural example.

[0041] Figure 13 This is a diagram illustrating the electrical system of a photovoltaic power generation system.

[0042] Figure 14A This is a diagram showing the photovoltaic power generation system according to the second embodiment as viewed from an orthogonal direction.

[0043] Figure 14B This is a diagram showing the photovoltaic power generation system according to the second embodiment as viewed from an orthogonal direction.

[0044] Figure 15 This is a cross-sectional view of a photovoltaic power generation system according to a second embodiment.

[0045] Figure 16A This is a diagram showing the photovoltaic power generation system according to the third embodiment as viewed from an orthogonal direction.

[0046] Figure 16B This is a diagram showing the photovoltaic power generation system according to the third embodiment as viewed from an orthogonal direction.

[0047] Figure 16C This is a diagram showing the photovoltaic power generation system according to the third embodiment as viewed from an orthogonal direction.

[0048] Figure 17 This is a cross-sectional view of a photovoltaic power generation system according to a third embodiment.

[0049] Figure 18 It is an explanatory diagram of a modified example of the shape of the support frame.

[0050] Figure 19A It is an explanatory diagram of a photovoltaic power generation system according to a first reference example.

[0051] Figure 19B It is an explanatory diagram of a photovoltaic power generation system according to a first reference example.

[0052] Figure 19C It is an explanatory diagram of a photovoltaic power generation system according to a first reference example. DETAILED DESCRIPTION

[0053] Hereinafter, the present disclosure will be described by way of embodiments with reference to the accompanying drawings. However, the present disclosure is not limited to the following embodiments. The accompanying drawings are schematic diagrams.

[0054] (Implementation Method 1)

[0055] Figure 1A 、 Figure 1B and Figure 1C This is an explanatory diagram of the photovoltaic power generation system 100 according to the first embodiment.

[0056] Figure 2A and Figure 2B This is a diagram of the photovoltaic power generation system 100 according to the first embodiment as viewed from the orthogonal direction 153 .

[0057] Figure 3 1 is a cross-sectional view of a photovoltaic power generation system 100 according to Embodiment 1. The photovoltaic power generation system 100 includes a window unit 105. Specifically, Figure 2A In , the window unit 105 is closed. Figure 2B , the window unit 105 is open. Figure 3 It will Figure 2B The photovoltaic power generation system 100 shown is a cross-sectional view taken along line III-III and viewed in the direction of the arrow.

[0058] The photovoltaic power generation system 100 includes a first structure 110, a second structure 120 and a guide 170. The guide 170 guides the movement of at least one of the first structure 110 and the second structure 120. In embodiment 1, the first structure 110 is a window, specifically an indoor side window. The second structure 120 is a window, specifically an outdoor side window. The guide 170 is provided on the window frame 109. A window unit 105 including the first structure 110, the second structure 120 and the window frame 109 is formed. In the window unit 105 of this embodiment, a double sliding window is formed. Arrow 160 indicates the incident direction of light (specifically, sunlight). In addition, in this specification, a "window" is a component provided in an opening portion. A "window" may also be a partition. A "window" may be plate-shaped. A "window" may have light transmittance. A "window" may be movable or immovable. A "window" includes, for example, glass, resin, etc.

[0059] Figures 1A to 3 A lateral direction (first direction) 151, a longitudinal direction (second direction) 152, and an orthogonal direction (third direction) 153 are shown. The lateral direction 151, longitudinal direction 152, and orthogonal direction 153 are orthogonal to one another. In Embodiment 1, the lateral direction 151 is the direction in which window unit 105 opens and closes. At least one selected from the group consisting of first structure 110 and second structure 120 moves in the lateral direction 151, thereby opening and closing window unit 105. Orthogonal direction 153 is the direction from the outdoors toward the indoors, or from the indoors toward the outdoors.

[0060] In this specification, “orthogonal” does not necessarily mean that the angle formed is strictly 90°. In this specification, “orthogonal” is considered to be when the angle formed is 85° or more and 95° or less.

[0061] The horizontal (first direction) 151, the vertical (second direction) 152, and the orthogonal (third direction) 153 are merely terms indicating relative relationships. The horizontal (first direction) 151 can be either horizontal or vertical. The vertical (second direction) 152 can be either vertical or horizontal. Here, the vertical direction is the direction of gravity. The above points apply to Embodiments 1 to 3 described below.

[0062] In Embodiment 1, the second structure 120 is arranged on the light incident side (specifically, sunlight) of the first structure 110. The first structure 110 is arranged on the indoor side of the second structure 120, and the second structure 120 is arranged on the outdoor side of the first structure 110. The first structure 110 and the second structure 120 are arranged at different positions in the orthogonal direction 153.

[0063] The first structure 110 has a plurality of first photoelectric converters 111. Each first photoelectric converter 111 is formed, for example, by utilizing a portion or all of one or more integrated solar cell modules. The second structure 120 has a plurality of second photoelectric converters 121. Each second photoelectric converter 121 is formed, for example, by utilizing a portion or all of one or more integrated solar cell modules. The number of second photoelectric converters 121 in the second structure 120 may also be one. The second structure may also be a screen or a blind. A solar cell module is a component that includes multiple elements for performing photovoltaic power generation. The multiple elements include, for example, multiple photoelectric conversion elements. The light absorption layer 23 may be equivalent to the photoelectric conversion element in this article.

[0064] Figure 4 This is an explanatory diagram of the configuration of a plurality of first photoelectric converters 111. The plurality of first photoelectric converters 111 extend in a horizontal direction 151 as a length direction, respectively. The arrangement direction of the plurality of first photoelectric converters 111 is a longitudinal direction 152. Two mutually adjacent first photoelectric converters 111 among the plurality of first photoelectric converters 111 include regions that are opposed to each other in the longitudinal direction 152. In this embodiment, when viewed from the orthogonal direction 153, the plurality of first photoelectric converters 111 are configured so that a first imaginary straight line 157 extending in the longitudinal direction 152 intersects the plurality of first photoelectric converters 111. The number of first photoelectric converters 111 is, for example, greater than 2 and less than 50, or may be greater than 5 and less than 30. In addition, "when viewed from the orthogonal direction 153" means "when viewed through along the orthogonal direction 153."

[0065] Here, the first photoelectric converter 111 is described as extending in the transverse direction 151 as the longitudinal direction. Figure 4 As shown, the smallest rectangle containing the first photoelectric converter 111 when viewed from the orthogonal direction 153, having sides extending in the lateral direction 151 and sides extending in the longitudinal direction 152, is defined as the first evaluation rectangle Q1. In the above statement, "the first photoelectric converter 111 extends with the lateral direction 151 as its longitudinal direction," "longitudinal direction" refers to the direction of the long side of the first evaluation rectangle Q1. Furthermore, "extends" in this statement means extending continuously or intermittently. The first photoelectric converter 111 may also have rounded corners, and the above description also applies in this case.

[0066] The statement that the first photoelectric converter 111 extends discontinuously with the transverse direction 151 as the longitudinal direction is explained. This statement includes the following cases: · The first photoelectric converter 111 is a plurality of photoelectric conversion elements arranged in the transverse direction 151, each photoelectric conversion element at least partially overlaps with the continuous structure when viewed from the orthogonal direction 153, and the continuous structure constitutes at least a part of the path that electrically connects the plurality of photoelectric conversion elements; and · The first photoelectric converter 111 is a plurality of photoelectric conversion elements arranged in the transverse direction 151, a plurality of prescribed structures are arranged in the transverse direction 151, a photoelectric conversion element is arranged between the first electrode and the second electrode in each prescribed structure in the orthogonal direction 153, and adjacent prescribed structures in the transverse direction 151 are separated by grooves. Specific examples of the continuous structure, prescribed structure, first electrode, second electrode and groove will be referred to. 9A to 12D The light absorbing layer 23 may be equivalent to the photoelectric conversion element herein.

[0067] The description that the first photoelectric converter 111 extends in the transverse direction 151 as the longitudinal direction is further explained. 8A to 12D As will be described later, the first photoelectric converter 111 may be formed using a part or all of one or more integrated solar cell modules 50. In this case, the lateral direction 151 may be a direction perpendicular to the stacking direction.

[0068] Here, the stacking direction is the direction in which multiple unit structures are repeatedly arranged. 8A to 12D In the example, the stacking direction is vertical 152. 8A to 12D In the example of , the unit structure is a structure including the first electrode 26, the electron transport layer 25, the porous layer 24, the light absorbing layer 23, the hole transport layer 22 and the second electrode 21. Figure 1A Morphological application 8A to 12D The structural situation is still correct Figure 18 Morphological application 8A to 12D In the case of the structure, the stacking direction is longitudinal 152.

[0069] In addition, at different positions on the horizontal direction 151, the structure of the cross section perpendicular to the horizontal direction 151 composed of multiple layers may be the same. 8A to 12D In the example of FIG, the plurality of layers include the first electrode 26 , the electron transport layer 25 , the porous layer 24 , the light absorbing layer 23 , the hole transport layer 22 , and the second electrode 21 . Figure 8B and Figure 9B The structure shown is a specific example of a cross-sectional structure.

[0070] exist Figure 4Dimension W1a is the dimension in the longitudinal direction 152 of the first photoelectric converter 111. Dimension L1a is the dimension in the lateral direction 151 of the first photoelectric converter 111. The ratio L1a / W1a of dimension L1a to dimension W1a is, for example, 5 or more and 400 or less. Alternatively, the ratio L1a / W1a may be 10 or more and 200 or less.

[0071] exist Figure 4 In FIG, pitch P1a is the pitch between the plurality of first photoelectric converters 111 arranged in the longitudinal direction 152. The ratio W1a / P1a of dimension W1a to pitch P1a is, for example, greater than 0.5 and less than 1.0. The ratio W1a / P1a may also be greater than 0.8 and less than 1.0. Dimension W1a may be the same as pitch P1a or smaller than pitch P1a.

[0072] Dimension W1a is, for example, greater than 5 mm and less than 60 mm. Dimension W1a may also be greater than 10 mm and less than 30 mm. Dimension L1a is, for example, greater than 300 mm and less than 4000 mm. Dimension L1a may also be greater than 600 mm and less than 2000 mm. Pitch P1a is, for example, greater than 2.5 mm and less than 60 mm. Pitch P1a may also be greater than 4 mm and less than 30 mm.

[0073] exist Figure 3 Dimension T1a is the dimension of the first photoelectric converter 111 in the orthogonal direction 153. Specifically, dimension T1a is the thickness of the first photoelectric converter 111. Dimension T1a is, for example, not less than 100 nm and not more than 100 μm. The lower limit of the range of dimension T1a may be 200 nm or 500 nm. The upper limit of the range of dimension T1a may be 10 μm, 5 μm, 1.5 μm, or 1.2 μm.

[0074] The plurality of first photoelectric converters 111 are electrically connected in series. The manner of the electrical connection is not particularly limited. In this embodiment, when viewed from the orthogonal direction 153, the plurality of first photoelectric converters 111 are electrically connected to each other along the longitudinal direction 152. A specific example of this structure will be referred to later. Figure 8A and Figure 8B The first photoelectric converter 111 can be electrically connected to the first photoelectric converter 111 adjacent to the vertical direction 152 over the entire dimension L1a in the horizontal direction 151 .

[0075] Figure 5 1 is an explanatory diagram of a modified example of the electrical connection of the plurality of first photoelectric converters 111. Figure 5, the electrical connection is schematically shown by the dotted line 111L. The plurality of first photoelectric converters 111 are electrically connected in series. Specifically, each first photoelectric converter 111 includes an end portion 111e and an end portion 111f that are opposite to each other in the horizontal direction 151. The end portion 111e and the end portion 111f are each, for example, a region of one portion when the first photoelectric converter 111 is equally divided into 10 portions in the horizontal direction 151. Figure 5 In the embodiment, among the plurality of first photoelectric converters 111 , an end portion 111 e of one of two adjacent first photoelectric converters 111 is electrically connected to an end portion 111 f of the other first photoelectric converter 111 .

[0076] like Figure 2A As shown, the first structure 110 includes a first support frame 118. The first support frame 118 supports a plurality of first photoelectric converters 111. When viewed from an orthogonal direction 153, the first support frame 118 has a closed frame shape. In this embodiment, the inner and outer contours of the closed frame are rectangular. Here, the concept of rectangle includes square. When viewed from an orthogonal direction 153, at least a portion of the first photoelectric converter 111 is located within the closed frame. In this embodiment, the entire first photoelectric converter 111 is located within the closed frame. The first support frame 118 is made of, for example, metal or resin.

[0077] The expression "the first support frame 118 supports the plurality of first photoelectric converters 111" is explained. This expression includes a method in which the first support frame 118 supports the plurality of first photoelectric converters 111 by being in contact with the plurality of first photoelectric converters 111. In addition, this expression includes a method in which the first support frame 118 supports the plurality of first photoelectric converters 111 via other components. The same applies to expressions such as "the second support frame 128 supports at least one second photoelectric converter 121", "the plurality of first photoelectric converters 111... are supported by the first substrate 113", and "at least one second photoelectric converter 121... is supported by the third substrate 123". In this embodiment, as Figure 3 As shown, the first support frame 118 supports the plurality of first photoelectric converters 111 via the first substrate 113 .

[0078] like Figure 2AAs shown, the first support frame 118 includes a first frame 118A, a second frame 118B, a third frame 118C, and a fourth frame 118D. The first frame 118A and the second frame 118B extend in a horizontal direction 151. The first frame 118A and the second frame 118B are opposite each other. The third frame 118C connects the first frame 118A and the second frame 118B. The fourth frame 118D connects the first frame 118A and the second frame 118B. The third frame 118C and the fourth frame 118D are opposite each other. When viewed from an orthogonal direction 153, the first frame 118A, the second frame 118B, the third frame 118C, and the fourth frame 118D cooperate to form the aforementioned closed frame shape. The third frame 118C and the fourth frame 118D extend in a direction different from the horizontal direction 151, specifically, in the longitudinal direction 152.

[0079] like Figure 3 As shown, the first structure 110 includes a first substrate 113, a second substrate 114, and a spacer 115. The first substrate 113 is disposed outdoors. The second substrate 114 is disposed indoors. The first substrate 113 and the second substrate 114 are made of glass. When viewed from an orthogonal direction 153, the spacer 115 has a closed frame shape. A multilayer glass 116 is formed, including the first substrate 113, the second substrate 114, and the spacer 115. A hollow layer 116a is provided within the multilayer glass 116, which is divided by the first substrate 113, the second substrate 114, and the spacer 115. The hollow layer 116a may be, for example, a layer of air, a layer of argon, or a layer having a higher degree of vacuum than the outside air. A plurality of first photoelectric converters 111 are arranged within the hollow layer 116a and supported by the first substrate 113. The first substrate 113 protects the plurality of first photoelectric converters 111. The specific light transmittance of the first substrate 113 in the orthogonal direction 153 is, for example, 30% or greater and less than 100%. The specific light transmittance of the second substrate 114 in the orthogonal direction 153 is, for example, 30% or greater and less than 100%. Here, the specific light transmittance refers to the average value of the light transmittance in the wavelength range of 400 nm to 800 nm. The first substrate 113 and the second substrate 114 can also be made of resin.

[0080] The second structure 120 has at least one second photoelectric converter 121. In this embodiment, the second structure 120 has a plurality of second photoelectric converters 121. Each second photoelectric converter 121 is formed by, for example, a part or all of one or more integrated solar cell modules. Figure 3As shown, the second structure 120 includes a third substrate 123, a fourth substrate 124, and a spacer 125. The third substrate 123 is disposed outdoors. The fourth substrate 124 is disposed indoors. The third and fourth substrates 123, 124 are made of glass. When viewed from an orthogonal direction 153, the spacer 125 has a closed frame shape. A multilayer glass 126 is formed, including the third substrate 123, the fourth substrate 124, and the spacer 125. A hollow layer 126a is provided within the multilayer glass 126, which is divided by the third substrate 123, the fourth substrate 124, and the spacer 115. The hollow layer 126a can be, for example, a layer of air, a layer of argon, or a layer having a higher degree of vacuum than the ambient air. Multiple second photoelectric converters 121 are arranged within the hollow layer 126a and supported by the third substrate 123. The third substrate 123 protects the multiple second photoelectric converters 121. The specific light transmittance of the third substrate 123 in the orthogonal direction 153 is, for example, 30% or more and less than 100%. The specific light transmittance of the fourth substrate 124 in the orthogonal direction 153 is, for example, 30% or more and less than 100%. The third substrate 123 and the fourth substrate 124 may also be made of resin.

[0081] Figure 6 This is an explanatory diagram of the arrangement of the plurality of second photoelectric converters 121. The plurality of second photoelectric converters 121 extend in a longitudinal direction 151, respectively. The direction in which the plurality of second photoelectric converters 121 are arranged is a longitudinal direction 152. Two mutually adjacent second photoelectric converters 121 among the plurality of second photoelectric converters 121 include regions that are opposed to each other in the longitudinal direction 152. In this embodiment, when viewed from the orthogonal direction 153, the plurality of second photoelectric converters 121 are arranged in such a manner that a second imaginary straight line 158 extending in the longitudinal direction 152 intersects the plurality of second photoelectric converters 121. The number of the second photoelectric converters 121 is, for example, greater than 2 and less than 50, or may be greater than 5 and less than 30. The number of the second photoelectric converters 121 may be the same as or different from the number of the first photoelectric converters 111.

[0082] Here, the second photoelectric converter 121 is described as extending in the transverse direction 151 as the longitudinal direction. Figure 6 As shown, the smallest rectangle containing the second photoelectric converter 121 when viewed from the orthogonal direction 153, having sides extending in the lateral direction 151 and sides extending in the longitudinal direction 152, is defined as the second evaluation rectangle Q2. In the above statement, "the second photoelectric converter 121 extends with the lateral direction 151 as its longitudinal direction," "longitudinal direction" refers to the direction of the long sides of the second evaluation rectangle Q2. Furthermore, "extends" in this statement means extending continuously or intermittently. The second photoelectric converter 121 may have rounded corners, and the above description also applies in this case.

[0083] The statement that the second photoelectric converter 121 extends discontinuously with the transverse direction 151 as the longitudinal direction is explained. This statement includes the following cases: · The second photoelectric converter 121 is a plurality of photoelectric conversion elements arranged in the transverse direction 151, each photoelectric conversion element at least partially overlaps with the continuous structure when viewed from the orthogonal direction 153, and the continuous structure constitutes at least a part of the path that electrically connects the plurality of photoelectric conversion elements; and · The second photoelectric converter 121 is a plurality of photoelectric conversion elements arranged in the transverse direction 151, a plurality of prescribed structures are arranged in the transverse direction 151, a photoelectric conversion element is arranged between the first electrode and the second electrode in each prescribed structure in the orthogonal direction 153, and adjacent prescribed structures in the transverse direction 151 are separated by grooves. Specific examples of the continuous structure, prescribed structure, first electrode, second electrode and groove will be referred to. 9A to 12D The light absorbing layer 23 may be equivalent to the photoelectric conversion element herein.

[0084] The second photoelectric converter 121 extends in the transverse direction 151 as the longitudinal direction. 8A to 12D As will be described later, the second photoelectric converter 121 may be formed using a part or all of one or more integrated solar cell modules 50. In this case, the lateral direction 151 may be a direction perpendicular to the stacking direction.

[0085] exist Figure 6 Dimension W2a is the dimension of the second photoelectric converter 121 in the longitudinal direction 152. Dimension L2a is the dimension of the second photoelectric converter 121 in the lateral direction 151. The ratio L2a / W2a of dimension L2a to dimension W2a is, for example, 5 or more and 400 or less. Alternatively, the ratio L2a / W2a may be 10 or more and 200 or less.

[0086] exist Figure 6 In the diagram, pitch P2a is the spacing between the plurality of second photoelectric converters 121 arranged in the longitudinal direction 152. The ratio W2a / P2a of dimension W2a to pitch P2a is, for example, greater than 0.5 and less than 1.0. The ratio W2a / P2a may also be greater than 0.8 and less than 1.0. Dimension W2a may be the same as pitch P2a or smaller than pitch P2a.

[0087] Dimension W2a is, for example, greater than 5 mm and less than 60 mm. Dimension W2a may also be greater than 10 mm and less than 30 mm. Dimension L2a is, for example, greater than 300 mm and less than 4000 mm. Dimension L2a may also be greater than 600 mm and less than 2000 mm. Pitch P2a is, for example, greater than 2.5 mm and less than 60 mm. Pitch P2a may also be greater than 4 mm and less than 30 mm.

[0088] exist Figure 3Dimension T2a is the dimension of the second photoelectric converter 121 in the orthogonal direction 153. Specifically, dimension T2a is the thickness of the second photoelectric converter 121. Dimension T2a is, for example, not less than 100 nm and not more than 100 μm. The lower limit of the range of dimension T2a may be 200 nm or 500 nm. The upper limit of the range of dimension T2a may be 10 μm, 5 μm, 1.5 μm, or 1.2 μm.

[0089] The plurality of second photoelectric converters 121 are electrically connected in series. The manner of the electrical connection is not particularly limited. In this embodiment, when viewed from the orthogonal direction 153, the plurality of second photoelectric converters 121 are electrically connected to each other along the longitudinal direction 152. A specific example of this structure will be referred to later. Figure 8A and Figure 8B The second photoelectric converter 121 can be electrically connected to the second photoelectric converter 121 adjacent to the vertical direction 152 via the entire dimension L2a in the horizontal direction 151 .

[0090] Figure 7 1 is an explanatory diagram of a modified example of the electrical connection of the plurality of second photoelectric converters 121. Figure 7 , the electrical connection is schematically indicated by a dotted line 121L. The plurality of second photoelectric converters 121 are electrically connected in series. Specifically, each second photoelectric converter 121 includes an end 121e and an end 121f that are opposed to each other in the horizontal direction 151. The end 121e and the end 121f are each, for example, a region corresponding to one of the ten equal portions of the second photoelectric converter 121 when the second photoelectric converter 121 is divided into ten equal portions in the horizontal direction 151. Of the plurality of second photoelectric converters 121, the end 121e of one of the two adjacent second photoelectric converters 121 is electrically connected to the end 121f of the other second photoelectric converter 121.

[0091] like Figure 2A As shown, the second structure 120 includes a second support frame 128. The second support frame 128 supports at least one second photoelectric converter 121. When viewed from the orthogonal direction 153, the second support frame 128 has a closed frame shape. In this embodiment, the inner and outer contours of the closed frame shape are rectangular. When viewed from the orthogonal direction 153, at least a portion of the second photoelectric converter 121 is located within the closed frame. In this embodiment, the entire second photoelectric converter 121 is located within the closed frame. The second support frame 128 is made of, for example, metal or resin. In this embodiment, the second support frame 128 supports at least one second photoelectric converter 121 via the third substrate 123.

[0092] like Figure 2AAs shown, the second support frame 128 includes a fifth frame 128A, a sixth frame 128B, a seventh frame 128C, and an eighth frame 128D. The fifth frame 128A and the sixth frame 128B extend in a horizontal direction 151. The fifth frame 128A and the sixth frame 128B are opposed to each other. The seventh frame 128C connects the fifth frame 128A and the sixth frame 128B. The eighth frame 128D connects the fifth frame 128A and the sixth frame 128B. The seventh frame 128C and the eighth frame 128D are opposed to each other. When viewed from an orthogonal direction 153, the fifth frame 128A, the sixth frame 128B, the seventh frame 128C, and the eighth frame 128D cooperate to form the aforementioned closed frame shape. The seventh frame 128C and the eighth frame 128D extend in a direction different from the horizontal direction 151, specifically, in the longitudinal direction 152.

[0093] like Figure 3 As shown, the second structure 120 includes a third substrate 123, a fourth substrate 124, and a spacer 125. The third substrate 123 is positioned outdoors. The fourth substrate 124 is positioned indoors. The third and fourth substrates 123, 124 are made of glass. When viewed from an orthogonal direction 153, the spacer 125 has a closed frame shape. A multilayer glass 126 is formed, including the third substrate 123, the fourth substrate 124, and the spacer 125. A hollow layer 126a is provided within the multilayer glass 126, which is divided by the third substrate 123, the fourth substrate 124, and the spacer 125. The hollow layer 126a can be, for example, a layer of air, a layer of argon, or a layer having a higher degree of vacuum than the ambient air. At least one second photoelectric converter 121 is disposed within the hollow layer 126a and supported by the third substrate 123. The third substrate 123 protects the at least one second photoelectric converter 121. The specific light transmittance of the third substrate 123 in the orthogonal direction 153 is, for example, 30% or more and less than 100%. The specific light transmittance of the fourth substrate 124 in the orthogonal direction 153 is, for example, 30% or more and less than 100%.

[0094] The second structure 120 includes at least one light-blocking body 129 . In this embodiment, the at least one light-blocking body 129 includes at least one second photoelectric converter 121 and a second support frame 128 .

[0095] The specific light transmittance of at least one light-shielding body 129 in the orthogonal direction 153 is less than 100%. The specific light transmittance of at least one light-shielding body 129 in the orthogonal direction 153 may be less than 90%, less than 70%, less than 50%, less than 30%, or less than 10%.

[0096] The guide 170 guides the first relative movement of the second structure 120 relative to the first structure 110 in the lateral direction 151. During the first relative movement, either only the first structure 110 or the second structure 120 may move. Alternatively, both the first structure 110 and the second structure 120 may move.

[0097] In this embodiment, the guide 170 is specifically implemented by the first frame 109A and the second frame 109B in the window frame 109. The first frame 109A and the second frame 109B are opposed to each other and extend in the horizontal direction 151.

[0098] In this embodiment, the guide 170, while being engaged with at least one of the first and second structures 110 and 120, moves at least one of the first and second structures 110 and 120 in the lateral direction 151. Specifically, the guide 170, while being engaged with at least one of the first and second structures 110 and 120, slides at least one of the first and second structures 110 and 120 in the lateral direction 151.

[0099] Specifically, if Figure 3 As shown, the guide member 170 includes a first slot 171 and a second slot 172. The first slot 171 and the second slot 172 extend in the lateral direction 151 so as to sandwich the first structure 110 from the longitudinal direction 152. The first slot 171 and the second slot 172 enable the first structure 110 to move in the lateral direction 151. More specifically, the first slot 171 and the second slot 172 enable the first support frame 118 to move in the lateral direction 151.

[0100] The guide member 170 also includes a third groove 175 and a fourth groove 176. The third groove 175 and the fourth groove 176 extend in the lateral direction 151, sandwiching the second structure 120 from the longitudinal direction 152. The third groove 175 and the fourth groove 176 enable the second structure 120 to move in the lateral direction 151. More specifically, the third groove 175 and the fourth groove 176 enable the second support frame 128 to move in the lateral direction 151.

[0101] In this embodiment, the first relative movement causes at least one of the plurality of first photoelectric converters 111 to overlap with the seventh frame 128C when viewed from the orthogonal direction 153. Specifically, the first relative movement causes the seventh frame 128C to overlap with the plurality of first photoelectric converters 111 when viewed from the orthogonal direction 153. In this embodiment, the first relative movement causes at least one of the plurality of first photoelectric converters 111 to overlap with the eighth frame 128D when viewed from the orthogonal direction 153. Specifically, the first relative movement causes the eighth frame 128D to overlap with the plurality of first photoelectric converters 111 when viewed from the orthogonal direction 153. The fifth frame 128A does not overlap with the plurality of first photoelectric converters 111 when viewed from the orthogonal direction 153. The first relative movement causes the fifth frame 128A to overlap with the first frame 118A when viewed from the orthogonal direction 153. The sixth frame 128B does not overlap with the plurality of first photoelectric converters 111 when viewed from the orthogonal direction 153. The first relative movement achieves a state in which the sixth frame 128B overlaps the second frame 118B when viewed from the orthogonal direction 153 .

[0102] The first photoelectric converter 111 converts light into electric charges. Specifically, the first photoelectric converter 111 includes a material that converts light into electric charges. The first photoelectric converter 111 may include a perovskite compound. The first photoelectric converter 111 may include silicon. In this embodiment, the first photoelectric converter 111 is a film-shaped, specifically, thin-film photoelectric converter. A thin-film photoelectric converter refers to a photoelectric converter having a thickness of 100 nm or more and 10 μm or less. Specifically, the lower limit of the thickness range of the thin-film photoelectric converter may be 500 nm. The upper limit of the thickness range of the thin-film photoelectric converter may also be 1.5 μm.

[0103] The second photoelectric converter 121 converts light into electric charges. Specifically, the second photoelectric converter 121 includes a material that converts light into electric charges. The second photoelectric converter 121 may include a perovskite compound. The second photoelectric converter 121 may include silicon. In this embodiment, the second photoelectric converter 121 is a film-shaped, specifically, thin-film type photoelectric converter.

[0104] The first photoelectric converter 111 may be formed using a part or all of one or more integrated solar cell modules. Figure 8A It is a plan view of a first structural example using the integrated solar cell module 50 . Figure 8B : is a cross-sectional view of a first structural example using an integrated solar cell module 50. Specifically, Figure 8B It will Figure 8A The integrated solar cell module 50 is a cross-sectional view taken along line VIIIB-VIIIB and viewed from the direction of the arrow. Figure 8AIn FIG, elements other than the light absorbing layer 23 in the unit cell 20 are omitted from illustration. Figure 8B In FIG, some components of the integrated solar cell module 50 are omitted from illustration.

[0105] like Figure 8A As shown, in the integrated solar cell module 50 , the plurality of light absorbing layers 23 extend with the lateral direction 151 as the longitudinal direction.

[0106] The integrated solar cell module 50 includes a light-transmitting substrate 6 and a plurality of unit cells 20. Among the plurality of unit cells 20, mutually adjacent unit cells 20 are electrically connected in series.

[0107] like Figure 8B As shown, the integrated solar cell module 50 includes a light-transmitting substrate 6, a first electrode 16, an electron transport layer 15, a porous layer 14, a light-absorbing layer 13, a hole transport layer 12, and a second electrode 11, which are stacked in this order. The light-absorbing layer 13 comprises, for example, a perovskite compound represented by the composition formula AMX3. In this formula, A is a monovalent cation, M is a divalent cation, and X is a monovalent anion.

[0108] The first electrode 16, electron transport layer 15, and porous layer 14 are divided into a plurality of first electrodes 26, a plurality of electron transport layers 25, and a plurality of porous layers 24, respectively, by first dividing grooves 17. The light absorption layer 13 and the hole transport layer 12 are divided into a plurality of light absorption layers 23 and a plurality of hole transport layers 22, respectively, by second dividing grooves 18. The second electrode 11 is divided into a plurality of second electrodes 21 by third dividing grooves 19. In the first structural example, third dividing grooves 19 are also provided in the light absorption layer 13 and the hole transport layer 12. The first dividing grooves 17, the second dividing grooves 18, and the third dividing grooves 19 extend in a stripe shape in the lateral direction 151.

[0109] In the first structural example, a portion of the light absorbing layer 23 enters the interior of the first dividing groove 17. A portion of the second electrode 21 enters the interior of the second dividing groove 18. A space is formed inside the third dividing groove 19.

[0110] Each of the plurality of unit cells 20 has a stacked structure in which a first electrode 26, an electron transport layer 25, a porous layer 24, a light absorbing layer 23, a hole transport layer 22, and a second electrode 21 are stacked in this order. When viewed from the orthogonal direction 153, the second dividing groove 18 is arranged so as to overlap with the first electrode 26, the electron transport layer 25, and the porous layer 24. The second electrode 21 of the adjacent unit cell 20 is arranged within the second dividing groove 18. The first electrode 26 is electrically connected to the second electrode 21 of the adjacent unit cell 20 within the second dividing groove 18. In other words, the second dividing groove 18 functions as a cell connection groove.

[0111] Each unit cell 20 is an independent solar cell including an electron transport layer 25 forming a nip junction, a porous layer 24 , a light absorption layer 23 , and a hole transport layer 22 , and a first electrode 26 and a second electrode 21 serving as output terminals.

[0112] Here, the electrical connection of the plurality of unit cells 20 will be described using a certain unit cell 20 (a first unit cell 20A) and a second unit cell 20B and a third unit cell 20C adjacent to the first unit cell 20A.

[0113] The first electrode 26 of the first unit cell 20A is electrically connected to the second electrode 21 of the third unit cell 20C in the second unit cell 20B and the third unit cell 20C adjacent to each other on both sides. The second electrode 21 of the first unit cell 20A is electrically connected to the first electrode 26 of the second unit cell 20B. In this way, the plurality of unit cells 20 are electrically connected in series. The plurality of light absorbing layers 23 are electrically connected in series. Figure 8B , the electrical connection is schematically depicted by the dotted line 50L. Specifically, as can be understood from the dotted line 50L, a unit current path is repeatedly formed, in which the current flows from the light absorbing layer 23 to the other light absorbing layer 23 through the hole transport layer 22, the second electrode 21, the porous layer 24, the electron transport layer 25, the first electrode 26, the electron transport layer 25, and the porous layer 24 in sequence. Electricity can be extracted from one or more of the multiple first electrodes 26 and one or more of the multiple second electrodes 21. Figure 8B , an example of the power extraction location is schematically indicated by a diamond mark (◆). Furthermore, in such an integrated solar cell module 50 having a plurality of unit cells 20, the light absorbing layer 23 formed on the porous layer 24 is in contact with the first electrode 26 and the electron transport layer 25, the lower layers of the porous layer 24, in the first dividing grooves 17.

[0114] The first photoelectric converter 111 can be configured based on the first structural example. One light absorbing layer 23 extending in the transverse direction 151 can correspond to one continuously extending first photoelectric converter 111. The light-transmitting substrate 6 can correspond to the first substrate 113.

[0115] The second photoelectric converter 121 can be configured based on the first structural example. One light absorbing layer 23 extending in the transverse direction 151 can correspond to one continuously extending second photoelectric converter 121. The light-transmitting substrate 6 can correspond to the third substrate 123.

[0116] By configuring the first photoelectric converter 111 based on the first structural example as described above, it is possible to avoid damage to the first photoelectric converter 111. This point will be described below. Figure 8CIt is an explanatory diagram of the damage avoidance effect of the first structural example.

[0117] If the light-shielding body 129 moves relative to the integrated solar cell module 50 in the horizontal direction 151, the plurality of light-absorbing layers 23 can be shielded by the light-shielding body 129. The light-shielding is performed in such a way that the light-absorbing layer 23 that is not completely shielded and the light-absorbing layer 23 that is completely shielded are not generated at the same time. Therefore, there is no situation where the voltage generated by the power generation in the light-absorbing layer 23 that is not completely shielded is applied to the light-absorbing layer 23 that is completely shielded. Therefore, it is possible to avoid the situation where the reverse bias voltage is applied to the light-absorbing layer 23 that is completely shielded and damage is caused. In this regard, reference is also made to reference 19A to 19C and Figures 1A to 1C The following description.

[0118] Figure 9A 1 is a plan view of a second configuration example using the integrated solar cell module 50 . Figures 9B to 9D : is a cross-sectional view of a second structural example using an integrated solar cell module 50. Specifically, Figure 9B It will Figure 9A The illustrated integrated solar cell module 50 is a cross-sectional view taken along line IXB-IXB and viewed in the direction of the arrow. Figure 9C It will Figure 9A The integrated solar cell module 50 is a cross-sectional view taken along line IXC-IXC and viewed from the direction of the arrow. Figure 9B In the figure, it is shown that Figure 9A The IXC-IXC line and the cutting line 159 correspond to the position. In addition, Figure 9B The position of the cut-off line 159 appears in the Figure 9A The portion of the light absorbing layer 23 and the second electrode 21 through which the cutoff line 159 passes changes. Figure 9B The three cut lines 159 are drawn in order to illustrate this situation. Figure 9B , one of the three cutting lines 159 is marked as an LCD-LCD line. The LCD-LCD line is a cutting line passing through the first electrode 26, the electron transport layer 25, the porous layer 24, the light absorbing layer 23, the hole transport layer 22, and the second electrode 21. Figure 9D It will Figure 9B The integrated solar cell module 50 is a cross-sectional view when cut along the LCD-LCD line and viewed from the direction of the arrow. Figure 9A In FIG, elements other than the light absorbing layer 23 in the unit cell 20 are omitted from illustration. Figures 9B to 9D In the figure, some components of the integrated solar cell module 50 are omitted. The second configuration example is described below. Hereinafter, the same reference numerals are given to the common components in the first and second configuration examples, and their description may be omitted.

[0119] like Figure 9A As shown, a plurality of integrated solar cell modules 50 form an array 60. In the array 60, each integrated solar cell module 50 extends in a longitudinal direction 152. The plurality of integrated solar cell modules 50 are arranged in a transverse direction 151.

[0120] As according to Figure 9A 、 Figure 9C and Figure 9D As can be understood, grooves 70 are provided between adjacent light absorbing layers 23 in the transverse direction 151, between adjacent hole transport layers 22 in the transverse direction 151, and between adjacent second electrodes 21 in the transverse direction 151. No unit cells 20 are formed in the grooves 70.

[0121] like Figure 9D As shown, the groove 70 faces the side surface 21s of the second electrode 21, the side surface 22s of the hole transport layer 22, the side surface 23s of the light absorbing layer 23, and the main surface 24m of the porous layer 24. Here, the main surface of a certain element is a surface that is orthogonal to the thickness direction of the element. The side surface of a certain element is a surface connecting the two opposing main surfaces of the element. In the second structural example, the thickness direction of the second electrode 21, the thickness direction of the hole transport layer 22, the thickness direction of the light absorbing layer 23, the thickness direction of the porous layer 24, the thickness direction of the electron transport layer 25, and the thickness direction of the first electrode 26 are orthogonal directions 153.

[0122] like Figure 9B As shown, in each integrated solar cell module 50 , the first dividing grooves 17 , the second dividing grooves 18 , and the third dividing grooves 19 extend in a stripe shape in the transverse direction 151 .

[0123] In each integrated solar cell module 50 , a plurality of unit cells 20 are electrically connected in series. A plurality of light absorbing layers 23 are electrically connected in series. The plurality of light absorbing layers 23 are arranged in the longitudinal direction 152 .

[0124] and Figure 8B Likewise, in Figure 9B In FIG. 5 , an example of a power extraction position is schematically shown by a diamond mark (◆). The power extracted from each integrated solar cell module 50 can be combined later.

[0125] Figure 9E This is a diagram illustrating the electrical connection of the light absorbing layer 23 in the second structural example. The plurality of light absorbing layers 23 are arranged to form a plurality of rows 71 and a plurality of columns 72. Here, the rows 71 are arranged in the horizontal direction 151, and the columns 72 are arranged in the vertical direction 152.

[0126] In each column 72 , a plurality of light absorbing layers 23 are connected in series. Specifically, in each column 72 , two adjacent light absorbing layers 23 are connected via the second electrode 21 , the hole transport layer 22 , the porous layer 24 , the electron transport layer 25 , and the first electrode 26 .

[0127] Each row 71 has m (m is a positive integer greater than or equal to 2) light absorbing layers 23. In each row 71, adjacent light absorbing layers 23 are separated by grooves 70. That is, in each row 71, m light absorbing layers 23 are separated by (m-1) grooves 70. Figure 9D and Figure 9E As can be understood, a continuous structure 80 is provided in each row 71, facing (m-1) grooves 70. When viewed from the orthogonal direction 153, each of the plurality of light-absorbing layers 23 at least partially overlaps with the continuous structure 80. In each row 71, each of the plurality of light-absorbing layers 23 is electrically connected to the continuous structure 80, thereby electrically connecting the plurality of light-absorbing layers 23. In the second structural example, the continuous structure 80 is disposed between the light-transmitting substrate 6 and the plurality of light-absorbing layers 23. Specifically, the continuous structure 80 includes a first electrode 26, an electron transport layer 25, and a porous layer 24.

[0128] In each column 72, a series connection of multiple light absorbing layers 23 is formed. The multiple series connections associated with the multiple columns 72 are electrically connected in parallel via a first extraction circuit 75 and a second extraction circuit 76. When extracting power from these series connections via the first extraction circuit 75 and the second extraction circuit 76, a control voltage can be applied between the first extraction circuit 75 and the second extraction circuit 76. In one specific example, power is extracted from these series connections via the first extraction circuit 75 and the second extraction circuit 76 using maximum power point tracking (MPPT) control.

[0129] From the perspective of increasing the area ratio of the plurality of light absorbing layers 23 in the light-transmitting substrate 6 and increasing the generated power, Figure 8A and Figure 8B The first structural example shown is advantageous. In contrast, from the perspective of increasing light transmittance, Figures 9A to 9E The second configuration example shown is advantageous.

[0130] The first photoelectric converter 111 can be configured based on the second structural example. Each of the plurality of integrated solar cell modules 50 has a light absorbing layer 23 at a common position in the longitudinal direction 152. These light absorbing layers 23 can correspond to one of the first photoelectric converters 111 extending intermittently. Figure 9A In FIG. 1 , for the purpose of explanation, the region corresponding to one first photoelectric converter 111 is hatched. In other words, Figure 9EThe row 71 shown may correspond to one first photoelectric converter 111 extending intermittently. Figure 9A and Figure 9E In the embodiment, a plurality of first photoelectric converters 111 are formed. These points also apply to the third, fourth, and fifth configuration examples described later.

[0131] The second photoelectric converter 121 can be configured based on the second structural example. Each of the plurality of integrated solar cell modules 50 has a light absorbing layer 23 at a common position in the longitudinal direction 152. These light absorbing layers 23 can correspond to one of the second photoelectric converters 121 extending intermittently. Figure 9A In FIG. 1 , for the purpose of explanation, the region corresponding to one second photoelectric converter 121 is hatched. In other words, Figure 9E The row 71 shown may correspond to one of the second photoelectric converters 121 extending intermittently. Figure 9A and Figure 9E In the embodiment, a plurality of second photoelectric converters 121 are formed. These points also apply to the third, fourth, and fifth configuration examples described later.

[0132] By configuring the first photoelectric converter 111 based on the second structural example as described above, it is possible to avoid damage to the first photoelectric converter 111. This point will be described below. Figure 9F This is an illustration of the damage avoidance effect of the second structural example. Figure 9F In the example, a plurality of columns 72 are formed.

[0133] exist Figure 9F , n (n is a positive integer greater than or equal to 2) light absorbing layers 23 belong to each column 72. If the light shielding body 129 moves relative to the array 60 in the horizontal direction 151, the multiple columns 72 are shielded by the light shielding body 129 in sequence. The light shielding of each column 72 is not performed in a manner that the light absorbing layers 23 less than n are shielded, but in a manner that all n light absorbing layers 23 are shielded. Therefore, in one column 72, there is no situation where the voltage generated by the power generation in the light absorbing layer 23 that is not completely shielded is applied to the light absorbing layer 23 that is completely shielded. Therefore, it is possible to avoid the situation where a reverse bias voltage is applied to the light absorbing layer 23 that is completely shielded and damage occurs. These points are also the same for the third structural example, the fourth structural example, and the fifth structural example described later.

[0134] In addition, Figure 9EIn Figure 1, one column 72 is labeled column 72a, and the other column 72 is labeled column 72b. Columns 72a and 72b are adjacent to each other in the horizontal direction 151. Consider the following situation: All n light-absorbing layers 23 in column 72a are shielded from light, while all n light-absorbing layers 23 in column 72b are illuminated with light. Power is extracted from the arrangement of light-absorbing layers 23 via the first extraction circuit 75 and the second extraction circuit 76. The current-voltage characteristics of the light-absorbing layers 23 include a region where the voltage varies while the current is approximately zero. Under these conditions, the light-absorbing layers 23 in column 72a can operate at an operating point in this region where the current is approximately zero and the voltage is non-zero. Meanwhile, the light-absorbing layers 23 in column 72b, while their voltage is balanced with the voltage of the light-absorbing layers 23 in column 72a, can operate at an operating point where the current is non-zero. Thus, although the operating point of the light-absorbing layer 23 in column 72b is affected by the light-absorbing layer 23 in column 72a, power generation can be performed without damage. Typically, the impact is limited. This applies to the third, fourth, and fifth configuration examples described below.

[0135] Hereinafter, a third configuration example, a fourth configuration example, and a fifth configuration example using the integrated solar cell module 50 will be described. In the description of the third configuration example, the fourth configuration example, and the fifth configuration example, descriptions overlapping with the second configuration example may be omitted.

[0136] Figure 10A : is a plan view of a third structural example using an integrated solar cell module 50. In addition, the third structural example has the same Figure 9B The cross-sectional structure shown.

[0137] In the third configuration example, the grooves 70 are deeper than in the second configuration example. In the second configuration example, the grooves 70 are provided for each row 71 , whereas in the third configuration example, the grooves 70 are provided across a plurality of rows 71 . Figure 10B It will Figure 10A The illustrated integrated solar cell module 50 is a cross-sectional view taken along line XB-XB and viewed in the direction of the arrow. Figure 10C is a cross-sectional view showing the cross-sectional structure of the third structural example, and is a cross-sectional view showing the cross-sectional structure of the third structural example. Figure 9D Cross-sectional view of the corresponding section.

[0138] like Figure 10B As shown, the groove 70 penetrates the porous layer 14 and faces the main surface 15m of the electron transport layer 15. Figure 10C As shown, the groove 70 faces the side surface 21 s of the second electrode 21 , the side surface 22 s of the hole transport layer 22 , the side surface 23 s of the light absorption layer 23 , the side surface 24 s of the porous layer 24 , and the main surface 25 m of the electron transport layer 25 .

[0139] In the third exemplary configuration, similar to the second exemplary configuration, a continuous structure 80 is provided in each row 71, facing the (m-1) grooves 70. When viewed from the orthogonal direction 153, each of the plurality of light-absorbing layers 23 at least partially overlaps with the continuous structure 80. In each row 71, each of the plurality of light-absorbing layers 23 is electrically connected to the continuous structure 80, thereby electrically connecting the plurality of light-absorbing layers 23. In the third exemplary configuration, similar to the second exemplary configuration, the continuous structure 80 is disposed between the light-transmitting substrate 6 and the plurality of light-absorbing layers 23. Specifically, the continuous structure 80 includes a first electrode 26 and an electron transport layer 25.

[0140] The fourth structural example has the same characteristics as the third structural example. Figure 10A and Figure 9B However, in the fourth structural example, the groove 70 is deeper than that in the third structural example.

[0141] Figure 11A is a cross-sectional view showing the cross-sectional structure of the fourth structural example, and is a cross-sectional view showing the cross-sectional structure of the fourth structural example. Figure 9C and Figure 10B Cross-sectional view of the corresponding section. Figure 11B is a cross-sectional view showing the cross-sectional structure of the fourth structural example, and is a cross-sectional view showing the cross-sectional structure of the fourth structural example. Figure 9D and Figure 10C Cross-sectional view of the corresponding section.

[0142] like Figure 11A As shown, the groove 70 penetrates the porous layer 14 and the electron transport layer 15 and faces the main surface 16m of the first electrode 16. Figure 11B As shown, the groove 70 faces the side surface 21s of the second electrode 21, the side surface 22s of the hole transport layer 22, the side surface 23s of the light absorption layer 23, the side surface 24s of the porous layer 24, the side surface 25s of the electron transport layer 25, and the main surface 26m of the first electrode 26.

[0143] In the fourth configuration example, similar to the second and third configuration examples, a continuous structure 80 is provided in each row 71, facing the (m-1) grooves 70. When viewed from the orthogonal direction 153, each of the plurality of light-absorbing layers 23 at least partially overlaps with the continuous structure 80. In each row 71, each of the plurality of light-absorbing layers 23 is electrically connected to the continuous structure 80, thereby electrically connecting the plurality of light-absorbing layers 23. In the fourth configuration example, similar to the second and third configuration examples, the continuous structure 80 is disposed between the light-transmitting substrate 6 and the plurality of light-absorbing layers 23. Specifically, the continuous structure 80 includes the first electrode 26.

[0144] The fifth structural example has the same characteristics as the third structural example and the fourth structural example. Figure 10A and Figure 9B However, in the fifth structural example, the groove 70 is deeper than that in the fourth structural example.

[0145] Figure 12A is a cross-sectional view showing the cross-sectional structure of the fifth structural example, and is a cross-sectional view showing the cross-sectional structure of the fifth structural example. Figure 9C 、 Figure 10B and Figure 11A Cross-sectional view of the corresponding section. Figure 12B is a cross-sectional view showing the cross-sectional structure of the fifth structural example, and is a cross-sectional view showing the cross-sectional structure of the fifth structural example. Figure 9D 、 Figure 10C and Figure 11B Cross-sectional view of the corresponding section.

[0146] like Figure 12A As shown, the groove 70 penetrates the porous layer 14, the electron transport layer 15 and the first electrode 16 and faces the main surface 6m of the light-transmitting substrate 6. Figure 12B As shown, the groove 70 faces the side 21s of the second electrode 21, the side 22s of the hole transport layer 22, the side 23s of the light absorption layer 23, the side 24s of the porous layer 24, the side 25s of the electron transport layer 25, the side 26s of the first electrode 26 and the main surface 6m of the transparent substrate 6.

[0147] Figure 12C It is an explanatory diagram of the electrical connection of the light absorbing layer 23 in the fifth structural example. Figure 12D This diagram illustrates the arrangement of a predetermined structure 90 in the fifth structural example. In predetermined structure 90, light absorbing layer 23 is disposed between first electrode 26 and second electrode 21 in orthogonal direction 153. Specifically, predetermined structure 90 is a stacked structure comprising first electrode 26, electron transport layer 25, porous layer 24, light absorbing layer 23, hole transport layer 22, and second electrode 21 stacked in this order.

[0148] like Figure 12D As shown, in the fifth configuration example, a plurality of predetermined structures 90 are arranged to form a plurality of rows 91 and a plurality of columns 92. Here, the rows 91 are arranged in the horizontal direction 151, and the columns 92 are arranged in the vertical direction 152.

[0149] m prescribed structures 90 belong to each row 91. Figure 12B and Figure 12D As can be understood, in each row 91 , adjacent predetermined structures 90 are separated by the grooves 70 . That is, in each row 91 , m predetermined structures 90 are separated by (m−1) grooves 70 .

[0150] Specifically,

[0151] In each row 91 , adjacent first electrodes 26 are separated by the grooves 70 .

[0152] In each row 91 , mutually adjacent electron transport layers 25 are separated by the groove 70 .

[0153] In each row 91 , adjacent porous layers 24 are separated by the grooves 70 .

[0154] In each row 91 , adjacent light absorbing layers 23 are separated by the grooves 70 .

[0155] In each row 91 , mutually adjacent hole transport layers 22 are separated by the groove 70 .

[0156] In each row 91 , adjacent second electrodes 21 are separated by the groove 70 .

[0157] Appropriate changes can be applied to the structure of the integrated solar cell module 50. For details of the integrated solar cell module 50, refer to Patent Document 2, for example.

[0158] As can be understood from the above description, the first structure 110 has a plurality of first photoelectric converters 111. Each of the plurality of first photoelectric converters 111 extends in a transverse direction 151 as a longitudinal direction. The direction in which the plurality of first photoelectric converters 111 are arranged is a longitudinal direction 152. The second structure 120 has at least one light shielding body 129. The guide 170 guides the first relative movement of the second structure 120 relative to the first structure 110 in the transverse direction 151. This structure can improve the reliability of the photovoltaic power generation system. 19A to 19C and Figures 1A to 1C The reasons are explained below. Figures 1A to 1C Each first photoelectric converter 111 and Figures 8A to 8C The first structural example shown is also set as a continuum. 9A to 12D Even when the discontinuously extending first photoelectric converter 111 is employed as in the second to fifth configuration examples shown, the effect of improving the reliability of the photovoltaic power generation system can be achieved.

[0159] That is, if a photoelectric converter that is completely shielded from light and a photoelectric converter that is not completely shielded from light occur simultaneously among a plurality of photoelectric converters, the photoelectric converter that is completely shielded from light may be damaged. 19A to 19C It is an explanatory diagram of a photovoltaic power generation system according to a first reference example.

[0160] exist 19A to 19C In the example of , the window unit 505 includes a first window 510 on the indoor side and a second window 520 on the outdoor side. At least one of the first window 510 and the second window 520 moves in the horizontal direction 551 to open and close the window unit 505. 19A to 19C In the example of the window unit 505, a double sliding window is formed.

[0161] 19A to 19CThe horizontal direction 551, the vertical direction 552 and the orthogonal direction 553 are shown. The horizontal direction 551, the vertical direction 552 and the orthogonal direction 553 are directions that are orthogonal to each other. 19A to 19C In the example, horizontal direction 551 is the opening and closing direction of window unit 505. At least one selected from the group consisting of first window 510 and second window 520 moves in horizontal direction 551 to open and close window unit 505. Orthogonal direction 553 is the direction from the outdoors toward the indoors or from the indoors toward the outdoors.

[0162] The first window 510 has a plurality of first photoelectric converters 511. Figure 19A In the embodiment, the first window 510 has eight first photoelectric converters 511. The first photoelectric converters 511 are electrically connected in series. The first photoelectric converters 511 extend in a longitudinal direction (vertical direction) 552. The first photoelectric converters 511 are arranged in a lateral direction 551.

[0163] The second window 520 has a plurality of second photoelectric converters 521. Figure 19A In the embodiment, the second window 520 has eight second photoelectric converters 521. The plurality of second photoelectric converters 521 are electrically connected in series. The plurality of second photoelectric converters 521 each extend in a longitudinal direction 552. The plurality of second photoelectric converters 521 are arranged in a transverse direction 551.

[0164] exist Figure 19A In , the window unit 505 is in a fully closed state. Figure 19A In the example shown in FIG1 , first window 510 and second window 520 do not overlap. In the presence of sunlight 560 from the outdoors into the indoor space, power generation is generated not only by the plurality of second photoelectric converters 521 in second window 520 on the outdoor side but also by the plurality of first photoelectric converters 511 in first window 510 on the indoor side.

[0165] exist Figure 19C In , the window unit 505 is in a fully open state. Figure 19C In the example shown in FIG5 , first window 510 and second window 520 overlap. In the presence of sunlight 560, the plurality of second photoelectric converters 521 in second window 520 on the outdoor side generate electricity. On the other hand, the plurality of first photoelectric converters 511 in first window 510 on the indoor side do not generate electricity. This is because the plurality of first photoelectric converters 511 are shielded from sunlight by second window 520.

[0166] exist Figure 19BWindow unit 505 is half-open. Half-open refers to a partially open state. In this state, first window 510 and second window 520 partially overlap. In the presence of sunlight 560, power generation is performed in the plurality of second photoelectric converters 521 in second window 520 on the outdoor side. Some photoelectric converters 513 among the plurality of first photoelectric converters 511 in first window 510 on the indoor side are not completely shielded by second window 520. Therefore, power generation is performed in the photoelectric converters 513 that are not completely shielded. On the other hand, some photoelectric converters 514 among the plurality of first photoelectric converters 511 are completely shielded by second window 520. Therefore, power generation is not performed in the photoelectric converters 514 that are completely shielded.

[0167] exist Figure 19B In this situation, the voltage generated by the power generation of the photoelectric converter 513 is applied to the photoelectric converter 514, which is not generating power. This applies a reverse bias voltage to the photoelectric converter 514. When the photoelectric converter 514 is reverse biased, a large current due to its voltage-current characteristics is applied, which may damage it.

[0168] As can be understood from the above description, if one or some of the plurality of photoelectric converters are not completely shielded from light and one or some of the other photoelectric converters are completely shielded from light, the completely shielded photoelectric converters may be damaged.

[0169] Specifically, in 19A to 19C In the example, each of the plurality of first photoelectric converters 511 extends in a longitudinal direction 552 as a length direction. The arrangement direction of the plurality of first photoelectric converters 511 is a transverse direction 551. The direction of relative movement of the first window 510 and the second window 520 is a transverse direction 551. The direction of relative movement is not consistent with the length direction of the plurality of first photoelectric converters 511 but is consistent with the width direction. Under this configuration, among the plurality of first photoelectric converters 511, it is possible to simultaneously generate a photoelectric converter 513 that generates electricity in a completely unshielded state and a photoelectric converter 514 that does not generate electricity in a completely shielded state (see Figure 19B In this case, a reverse bias voltage is applied to the photoelectric converter 514, and a large current is applied due to its voltage-current characteristics, which may cause damage.

[0170] In contrast, in the structure described above in this embodiment, the direction of the first relative movement coincides with the longitudinal direction of the plurality of first photoelectric converters 111. This structure prevents the simultaneous occurrence of photoelectric converters that generate electricity when completely unshielded and photoelectric converters that do not generate electricity when completely shielded from light within the plurality of first photoelectric converters 111. Consequently, the aforementioned damage can be avoided.

[0171] In the example shown, Figure 1A In , the window unit 105 is in a fully closed state. Figure 1A In the example shown in FIG. 1 , in this state, the first structure 110 and the second structure 120 do not overlap at all. When sunlight 160 is directed from the outdoors into the interior, power generation is generated not only by the at least one second photoelectric converter 121 in the second structure 120 on the outdoor side but also by the plurality of first photoelectric converters 111 in the first structure 110 on the indoor side. Alternatively, a configuration may be employed in which the first structure 110 and the second structure 120 partially overlap when the window unit 105 is fully closed.

[0172] exist Figure 1C In the state where the window unit 105 is fully opened. Figure 1C In this example, the first structure 110 and the second structure 120 completely overlap. In the presence of sunlight 160, at least one second photoelectric converter 121 in the second structure 120 on the outdoor side generates electricity. On the other hand, the plurality of first photoelectric converters 111 in the first structure 110 on the indoor side do not generate electricity. This is because the plurality of first photoelectric converters 111 are shielded from sunlight by the second structure 120.

[0173] exist Figure 1B Window unit 105 is half-open. Half-open refers to a partially open state. In this state, first structure 110 and second structure 120 partially overlap. In the presence of sunlight 160, power generation is performed in at least one second photoelectric converter 121 in second structure 120 on the outdoor side. Multiple first photoelectric converters 111 in first structure 110 on the indoor side are partially shielded from light by second structure 120. However, each first photoelectric converter 111 is not completely shielded from light, but is partially illuminated by sunlight 160. Therefore, it is possible to avoid the application of a reverse bias voltage to the first photoelectric converter 111.

[0174] According to the reference 19A to 19C and Figures 1A to 1C It can be understood that: according to Figures 8A to 8C The first structural example shown can prevent the voltage generated by the light absorbing layer 23 that generates electricity in a completely unshielded state during relative movement from being applied to the light absorbing layer 23 that does not generate electricity in a completely shielded state, thereby preventing damage to the light absorbing layer 23. 9A to 9F The second to fifth structural examples shown can also avoid the situation where the voltage generated by the light absorption layer 23 that generates electricity in a completely unshielded state during relative movement is applied to the light absorption layer 23 that does not generate electricity in a completely shielded state, thereby avoiding damage to the light absorption layer 23.

[0175] This embodiment will be further described using the terms "first structural overlapping area," "first reference area," "first overlapping area," and "first overlapping ratio." These terms are defined as follows.

[0176] The first structural overlapping area is the overlapping area of the first structural body 110 and the second structural body 120 when viewed from the orthogonal direction 153 .

[0177] The first reference area is the entire area of one of the plurality of first photoelectric converters 111 when viewed from the orthogonal direction 153 .

[0178] The first overlapping area is the area where the first photoelectric converter 111 overlaps with at least one light-blocking body 129 when viewed from the orthogonal direction 153 .

[0179] The first overlap ratio is a ratio of the first overlap area to the first reference area.

[0180] In this embodiment, the first relative movement that increases the overlapping area of the first structure sequentially realizes the following states:

[0181] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 0% and less than 50%; and

[0182] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 50% and less than 100%.

[0183] This configuration can prevent the first relative movement from causing a first photoelectric converter 111 with a first overlap ratio of 0% and a first photoelectric converter 111 with a first overlap ratio of 100% to coexist among the plurality of first photoelectric converters 111. This can improve the reliability of the photovoltaic power generation system.

[0184] Specifically, the first relative movement that increases the overlapping area of the first structure sequentially realizes the following states:

[0185] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 0% and less than 33%;

[0186] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 33% and less than 67%; and

[0187] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 67% and less than 100%.

[0188] More specifically, the first relative movement that increases the overlapping area of the first structure sequentially achieves the following states:

[0189] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 0% and less than 25%;

[0190] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 25% and less than 50%;

[0191] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 50% and less than 75%; and

[0192] The first overlap ratio of each of the plurality of first photoelectric converters 111 is greater than 75% and less than 100%.

[0193] In this embodiment, the first relative movement prevents the simultaneous occurrence of a first photoelectric converter with a first overlap ratio of 0% and a first photoelectric converter with a first overlap ratio of 100% within the plurality of first photoelectric converters 111. Specifically, in this embodiment, the stopper 177 limits the relative position of the second structure 120 relative to the first structure 110, achieved by the first relative movement, within a first range. The first relative movement within the first range prevents the simultaneous occurrence of a first photoelectric converter with a first overlap ratio of 0% and a first photoelectric converter with a first overlap ratio of 100% within the plurality of first photoelectric converters 111. This structure can improve the reliability of the photovoltaic power generation system.

[0194] like Figure 2A As shown, the stopper 177 includes a first wall 177A and a second wall 177B. The first wall 177A defines Figure 3 The first groove 171, the second groove 172, the third groove 175 and the fourth groove 176 are shown as one end of each in the horizontal direction 151. The second wall 177B defines the other end of each of the first groove 171, the second groove 172, the third groove 175 and the fourth groove 176 in the horizontal direction 151. The first structure 110 and the second structure 120 abut against the first wall 177A, thereby hindering the movement of the first structure 110 and the second structure 120 in the horizontal direction 151. The first structure 110 and the second structure 120 abut against the second wall 177B, thereby hindering the movement of the first structure 110 and the second structure 120 in the horizontal direction 151. "Abut" means to be in contact and connected. In Figure 2A In the example shown, first wall 177A is third frame 109C of window frame 109. Second wall 177B is fourth frame 109D of window frame 109. Third frame 109C and fourth frame 109D face each other. Third frame 109C and fourth frame 109D extend in a direction different from horizontal direction 151, specifically, in vertical direction 152.

[0195] In this embodiment, the first relative movement within the first range is performed to maintain the uniformity of the first overlapping areas of the plurality of first photoelectric converters 111. Here, the value obtained by dividing the standard deviation by the arithmetic mean is defined as the rate of change. The uniformity of the first overlapping areas of the plurality of first photoelectric converters 111 means that the rate of change of the first overlapping areas of the plurality of first photoelectric converters 111 is greater than 0% and less than 10%. Alternatively, the first relative movement within the first range can maintain the rate of change of the first overlapping areas of the plurality of first photoelectric converters 111 at a level of greater than 0% and less than 5%.

[0196] In the above-mentioned first relative movement, the structure of the first overlap ratio changing is 8A to 12D The first to fifth structural examples shown are compatible, and the same also applies to the structure for maintaining the first overlapping area uniform.

[0197] In this embodiment, the first relative movement realizes a state in which the plurality of first photoelectric converters 111 and the at least one second photoelectric converter 121 at least partially overlap when viewed from the orthogonal direction 153 .

[0198] In this embodiment, not only the first structure 110 but also the second structure 120 includes a photoelectric converter. This structure is suitable for ensuring the power generated by the photovoltaic power generation system. Specifically, in this embodiment, when viewed from the orthogonal direction 153, at least a portion of at least one second photoelectric converter 121 can overlap with at least a portion of the plurality of first photoelectric converters 111. This layout that allows the photoelectric converters 111 and 112 to overlap allows the photoelectric converters 111 and 112 to be arranged over a large area. This is suitable for ensuring the power generated by the photovoltaic power generation system.

[0199] The expression "at least a portion of at least one second photoelectric converter 121 can overlap at least a portion of the plurality of first photoelectric converters 111" will be explained. When the at least one second photoelectric converter 121 is a plurality of second photoelectric converters 121, this expression includes the following aspects, etc.:

[0200] A portion of only one of the plurality of first photoelectric converters 111 can overlap with a portion of only one of the plurality of second photoelectric converters 121; and

[0201] All of the plurality of first photoelectric converters 111 can overlap with all of the plurality of second photoelectric converters 121 .

[0202] Specifically, this statement means that the positional relationship between the first structure 110 and the second structure 120 allowed in the photovoltaic power generation system 100 includes a positional relationship in which at least a portion of at least one second photoelectric converter 121 overlaps with at least a portion of the plurality of first photoelectric converters 111 .

[0203] In this embodiment, the first substrate 113 supports the plurality of first photoelectric converters 111 so that the plurality of first photoelectric converters 111 are arranged in an area greater than 50% of the area of the first substrate 113 when viewed from the orthogonal direction 153. This structure facilitates obtaining the power generated by the plurality of first photoelectric converters 111.

[0204] Specifically, the first substrate 113 supports the plurality of first photoelectric converters 111 so that the plurality of first photoelectric converters 111 are arranged in a region that is 70% or more of the area of the first substrate 113 when viewed from the orthogonal direction 153. More specifically, the first substrate 113 supports the plurality of first photoelectric converters 111 so that the plurality of first photoelectric converters 111 are arranged in a region that is 90% or more of the area of the first substrate 113 when viewed from the orthogonal direction 153.

[0205] In this embodiment, the third substrate 123 supports at least one second photoelectric converter 121 such that the at least one second photoelectric converter 121 is arranged in an area greater than 50% of the area of the third substrate 123 when viewed from the orthogonal direction 153. Specifically, the third substrate 123 supports at least one second photoelectric converter 121 such that the at least one second photoelectric converter 121 is arranged in an area greater than 70% of the area of the third substrate 123 when viewed from the orthogonal direction 153. More specifically, the third substrate 123 supports at least one second photoelectric converter 121 such that the at least one second photoelectric converter 121 is arranged in an area greater than 90% of the area of the third substrate 123 when viewed from the orthogonal direction 153.

[0206] In this embodiment, first substrate 113 is a glass substrate. First substrate 113 is positioned between second structure 120 and the plurality of first photoelectric converters 111 in orthogonal direction 153. This allows sunlight 160 to pass through first substrate 113 and reach the plurality of first photoelectric converters 111, while also protecting the first photoelectric converters 111. Alternatively, first substrate 113 may be a resin substrate.

[0207] In this embodiment, the third substrate 123 is a glass substrate, but may also be a resin substrate.

[0208] Figure 13 14 is an explanatory diagram of the electrical system of the photovoltaic power generation system 100. The photovoltaic power generation system 100 includes a first DC / DC converter 141, a second DC / DC converter 142, a power storage device 145, and a control device 147. The power storage device 145 is, for example, a battery or a capacitor.

[0209] Multiple first photoelectric converters 111, first DC / DC converter 141, and power storage device 145 are electrically connected in sequence. At least one second photoelectric converter 121, second DC / DC converter 142, and power storage device 145 are electrically connected in sequence. Control device 147 controls first DC / DC converter 141 and second DC / DC converter 142.

[0210] The term "first transformation ratio" will be used below. The first transformation ratio is the ratio of the output voltage from the first DC / DC converter 141 to the power storage device 145 to the input voltage from the plurality of first photoelectric converters 111 to the first DC / DC converter 141. In one control example, the control device 147 controls the first transformation ratio so that the output voltage from the first DC / DC converter 141 to the power storage device 145 follows a target value. The first relative movement can increase the sum of the first overlapping areas of the plurality of first photoelectric converters 111, thereby reducing the power generation voltage of the plurality of first photoelectric converters 111. In this case, by controlling the first transformation ratio as described above, fluctuations in the charging voltage of the power storage device 145 can be suppressed. This can maintain a high charging efficiency when charging the power generated by the plurality of first photoelectric converters 111 to the power storage device 145. The target value can be a fixed value or a variable value.

[0211] Other embodiments are described below. Elements common to previously described embodiments and later described embodiments are denoted by the same reference numerals, and their descriptions may be omitted. The descriptions of the various embodiments are mutually applicable as long as they are not technically inconsistent. The various embodiments may be combined as long as they are not technically inconsistent.

[0212] (Implementation Method 2)

[0213] Figure 14A and Figure 14B This is a diagram of the photovoltaic power generation system 200 according to the second embodiment as viewed from the orthogonal direction 153 . Figure 15 2 is a cross-sectional view of a photovoltaic power generation system 200 according to Embodiment 2. Specifically, Figure 14A In , the window unit 205 is closed. Figure 14B , the window unit 205 is open. Figure 15 It will Figure 14B The photovoltaic power generation system 200 shown is a cross-sectional view taken along line XV-XV and viewed in the direction of the arrow.

[0214] Photovoltaic power generation system 200 includes a third structure 230 and a fourth structure 240. In this embodiment, third structure 230 and fourth structure 240 each serve as a window. A guide 270 is provided on window frame 209. A window unit 205 is formed, comprising first structure 110, second structure 120, third structure 230, fourth structure 240, and window frame 209. In this embodiment, window unit 205 serves as a double sliding window.

[0215] The third structure 230 includes a plurality of third photoelectric converters 231. Similar to the plurality of first photoelectric converters 111, the plurality of third photoelectric converters 231 are electrically connected in series. Each of the plurality of third photoelectric converters 231 extends longitudinally in a transverse direction (first direction) 151. The plurality of third photoelectric converters 231 are arranged longitudinally in a longitudinal direction (second direction) 152.

[0216] The fourth structure 240 includes a plurality of fourth photoelectric converters 241. Similar to the plurality of first photoelectric converters 111, the plurality of fourth photoelectric converters 241 are electrically connected in series. Each of the plurality of fourth photoelectric converters 241 extends longitudinally in a transverse direction (first direction) 151. The plurality of fourth photoelectric converters 241 are arranged in a longitudinal direction (second direction) 152.

[0217] The description regarding the phrase "each of the plurality of first photoelectric converters 111 extends with the transverse direction 151 as its longitudinal direction" also applies to the phrase "each of the plurality of third photoelectric converters 231 extends with the transverse direction 151 as its longitudinal direction." The same description also applies to the phrase "each of the plurality of fourth photoelectric converters 241 extends with the transverse direction 151 as its longitudinal direction."

[0218] The guide 270 guides the second relative movement of the third structure 230 relative to the first structure 110 in the lateral direction 151. During the second relative movement, either only the first structure 110 or the third structure 230 may move. Alternatively, both the first structure 110 and the third structure 230 may move.

[0219] The guide 270 guides the third relative movement of the second structure 120 relative to the fourth structure 240 in the lateral direction 151. During the third relative movement, only the fourth structure 240 or only the second structure 120 may move. Furthermore, both the fourth structure 240 and the second structure 120 may move during the third relative movement.

[0220] In this embodiment, the guide 270, while engaged with at least one of the first and third structures 110 and 230, moves at least one of the first and third structures 110 and 230 in the lateral direction 151. The guide 270, while engaged with at least one of the fourth and second structures 240 and 120, moves at least one of the fourth and second structures 240 and 120 in the lateral direction 151. Specifically, the guide 270, while meshed with at least one of the first and third structures 110 and 230, slides at least one of the first and third structures 110 and 230 in the lateral direction 151. The guide 270, while meshed with at least one of the fourth and second structures 240 and 120, slides at least one of the fourth and second structures 120 in the lateral direction 151.

[0221] Specifically, if Figure 15 As shown, the guide member 270 includes a fifth groove 271 and a sixth groove 272. The fifth groove 271 and the sixth groove 272 extend in the lateral direction 151 so as to sandwich the third structure 230 from the longitudinal direction 152. The fifth groove 271 and the sixth groove 272 allow the third structure 230 to slide in the lateral direction 151.

[0222] The guide 270 includes a seventh groove 275 and an eighth groove 276. The seventh groove 275 and the eighth groove 276 extend in the lateral direction 151 so as to sandwich the fourth structure 240 from the longitudinal direction 152. The seventh groove 275 and the eighth groove 276 allow the fourth structure 240 to slide in the lateral direction 151.

[0223] The third structure 230 and the fourth structure 240 are located between the first structure 110 and the second structure 120 in the orthogonal direction 153. The third structure 230 and the fourth structure 240 are located at different positions in the orthogonal direction 153.

[0224] The description of the first structure 110 mentioned above can be used in conjunction with the description of the third structure 230 and the fourth structure 240 , and thus will be omitted. The description of the related parts includes the description of the guide, the groove, the DC / DC converter, and the like.

[0225] (Implementation 3)

[0226] Figure 16A 、 Figure 16B and Figure 16C This is a diagram of the photovoltaic power generation system 300 according to the third embodiment as viewed from the orthogonal direction (third direction) 153 . Figure 17 : is a cross-sectional view of a photovoltaic power generation system 300 according to Embodiment 3. Specifically, Figure 17 It will Figure 16BThe photovoltaic power generation system 300 shown is a cross-sectional view cut along line XVII-XVII and viewed in the direction of the arrow. The guide member 370 of embodiment 3 extends in a wider range than the space surrounded by the window frame 309 in the horizontal direction 151. In embodiment 3, the guide member 370 is implemented by a first rail 351 and a second rail 352 provided on the outdoor side closer to the window frame 309. The first rail 351 and the second rail 352 extend in the horizontal direction (first direction) 151 in such a manner as to sandwich the first structure 110 and the second structure 120 from the longitudinal direction (second direction) 152. Although not shown in the figure, a wall is provided around the window frame 309. The first rail 351 and the second rail 352 are fixed to the window frame 309 and the wall.

[0227] The first rail 351 and the second rail 352, while being engaged with at least one of the first and second structures 110 and 120, move at least one of the first and second structures 110 and 120 in the lateral direction 151. Specifically, the first rail 351 and the second rail 352, while being engaged with at least one of the first and second structures 110 and 120, slide the at least one of the first and second structures 110 and 120 in the lateral direction 151.

[0228] Specifically, if Figure 17 As shown, the first rail 351 includes a first groove 361. The second rail 352 includes a second groove 362. The first groove 361 and the second groove 362 extend in the lateral direction 151 so as to sandwich the first structure 110 from the longitudinal direction 152. The first groove 361 and the second groove 362 allow the first structure 110 to slide in the lateral direction 151.

[0229] Furthermore, the first rail 351 includes a third groove 365. The second rail 352 includes a fourth groove 366. The third groove 365 and the fourth groove 366 extend in the lateral direction 151 so as to sandwich the second structure 120 from the longitudinal direction 152. The third groove 365 and the fourth groove 366 allow the second structure 120 to slide in the lateral direction 151.

[0230] exist Figure 16A When viewed from the orthogonal direction 153, the entire space surrounded by the window frame 309 is covered by the first structure 110 and the second structure 120. Figure 17 ) exists, power generation is performed not only in at least one second photoelectric converter 121 in the second structure 120 on the outdoor side, but also in the plurality of first photoelectric converters 111 in the first structure 110 on the indoor side.

[0231] exist Figure 16BWhen viewed from the orthogonal direction 153, the second structure 120 is arranged at a position overlapping with the first structure 110. A portion of the space enclosed by the window frame 309 is covered by the first structure 110 and the second structure 120. The remaining portion of the space enclosed by the window frame 309 is neither covered by the first structure 110 nor by the second structure 120. Therefore, sunlight 160 can be effectively incident from the outdoors into the indoor space through this remaining portion of the space. In the presence of sunlight 160, power generation is generated in at least one second photoelectric converter 121 in the second structure 120 on the outdoor side. However, power generation is not generated in the multiple first photoelectric converters 111 in the first structure 110 on the indoor side. This is because the multiple first photoelectric converters 111 are shielded by the light shielding member 129 in the second structure 120.

[0232] exist Figure 16C When viewed from the orthogonal direction 153, the second structure 120 is positioned offset from the space enclosed by the window frame 309. A portion of the space enclosed by the window frame 309 is covered by the first structure 110. Another portion of the space enclosed by the window frame 309 is neither covered by the first structure 110 nor by the second structure 120. Therefore, sunlight 160 can be effectively transmitted from the outdoors through this other portion of the space into the interior. Furthermore, in the presence of sunlight 160, electricity is generated not only by the at least one second photoelectric converter 121 in the second structure 120 on the outdoor side but also by the plurality of first photoelectric converters 111 in the first structure 110 on the indoor side.

[0233] (Technology applicable to Embodiment 1, Embodiment 2, and Embodiment 3)

[0234] Various techniques can be applied to Embodiment 1, Embodiment 2, and Embodiment 3.

[0235] In a modified example of the second support frame 128, the seventh and eighth frames 128C and 128D have higher light transmittance than the fifth and sixth frames 128A and 128B. This structure minimizes the obstruction of light entering the plurality of first photoelectric converters 111 by the seventh and eighth frames 128C and 128D. Furthermore, by concealing wiring and other components behind the fifth and sixth frames 128A and 128B, a superior aesthetic can be achieved. The seventh and eighth frames 128C and 128D are made of, for example, glass or resin. The fifth and sixth frames 128A and 128B are made of, for example, metal or resin. In this modified example, the second support frame 128 may have a portion corresponding to the light shield 129 and a portion not corresponding to the light shield 129.

[0236] The fifth frame 128A, the sixth frame 128B, the seventh frame 128C, and the eighth frame 128D can all be made of a material with high light transmittance. In this case, the fifth frame 128A, the sixth frame 128B, the seventh frame 128C, and the eighth frame 128D are made of, for example, glass or resin. The second support frame 128 may not have a portion corresponding to the light shield 129, or a screen mesh may be provided in the portion corresponding to the light shield 129. Alternatively, the fifth frame 128A, the sixth frame 128B, the seventh frame 128C, and the eighth frame 128D can all be made of a material with low light transmittance. In this case, the fifth frame 128A, the sixth frame 128B, the seventh frame 128C, and the eighth frame 128D are made of, for example, metal or resin.

[0237] The above technique of using a frame with high light transmittance and a frame with low light transmittance can also be applied to the first support frame 118. The same is true for the above technique of making four frames of a material with high light transmittance and the above technique of making four frames of a material with low light transmittance.

[0238] Figure 18 1 and 2 are diagrams illustrating a modified example of the support frame shape. In this modified example, the inner and outer contours of the first support frame 118 and the second support frame 128 are parallelograms.

[0239] The second structure 120 may or may not have a light-transmitting component. For example, the second structure 120 may be a screen, a blind, a metal plate, or a colored substrate. One of the first structure 110 and the second structure 120 may be fixed.

[0240] In the first structure 110 , the second structure 120 , the third structure 230 , and the fourth structure 240 , the number of glass plates in each structure may not be two, but may be three or more.

[0241] In the embodiment, a window unit including the first structure 110 , the second structure 120 , and the window frame is configured.

[0242] The above description is made using Embodiments 1 to 3. In each embodiment, the window unit is described as constituting a double sliding window that opens horizontally, but it can also constitute a window that opens vertically (up and down sliding window). In addition, for example, the window unit can also constitute a single sliding window. In the case of a single sliding window, one of the first structure 110 and the second structure 120 is fixed, and the other can move. In the case of a single sliding window, the first relative movement of the second structure 120 relative to the first structure 110 in the horizontal direction 151 can also be achieved.

[0243] (appendix)

[0244] According to the present disclosure, the following technology is disclosed.

[0245] (Technique 1)

[0246] A photovoltaic power generation system comprises: a first structure having a plurality of first photoelectric converters; and a second structure having at least one second photoelectric converter; the plurality of first photoelectric converters each extend in a first direction as a length direction, the plurality of first photoelectric converters are arranged in a second direction orthogonal to the first direction, and when viewed from a third direction orthogonal to the first direction and the second direction, at least a portion of the at least one second photoelectric converter can overlap with at least a portion of the plurality of first photoelectric converters.

[0247] Technology 1 is suitable for ensuring the power generated by the photovoltaic power generation system.

[0248] (Technique 2)

[0249] According to the photovoltaic power generation system of technology 1, the at least one second photoelectric converter is a plurality of second photoelectric converters, each of the plurality of second photoelectric converters extends in the first direction as its length direction, and the direction in which the plurality of second photoelectric converters are arranged is the second direction.

[0250] Technology 2 is suitable for ensuring the power generated by the photovoltaic power generation system.

[0251] (Technique 3)

[0252] According to the photovoltaic power generation system of technology 1 or 2, the first structure has a first substrate supporting the plurality of first photoelectric converters, and the plurality of first photoelectric converters are arranged in an area larger than 50% of the area of the first substrate when viewed from the third direction.

[0253] Technology 3 is suitable for ensuring the power generated by the photovoltaic power generation system.

[0254] (Technique 4)

[0255] According to any one of techniques 1 to 3 of the photovoltaic power generation system, the first structure includes a first support frame that supports the plurality of first photoelectric converters.

[0256] According to the fourth technique, the plurality of first photoelectric converters can be stably supported.

[0257] (Technique 5)

[0258] The photovoltaic power generation system according to any one of techniques 1 to 4 includes a third structure having a plurality of third photoelectric converters, and the third structure is located between the first structure and the second structure in the third direction.

[0259] The structure of technique 5 is a structural example.

[0260] (Technique 6)

[0261] According to the photovoltaic power generation system of any one of techniques 1 to 5, the first structure has a first substrate of glass or resin, and the first substrate is located between the second structure and the plurality of first photoelectric converters in the third direction.

[0262] According to the sixth technique, light can be incident on the plurality of first photoelectric converters through the first substrate, while the first photoelectric converters are protected by the first substrate.

[0263] (Technique 7)

[0264] According to any one of techniques 1 to 6, the photovoltaic power generation system, wherein the dimension of the first photoelectric converter in the second direction is larger than 50% of the pitch at which the plurality of first photoelectric converters are arranged in the second direction.

[0265] According to the seventh technique, it is easy to obtain the electric power generated by the plurality of first photoelectric converters.

[0266] (Technique 8)

[0267] According to the photovoltaic power generation system according to any one of techniques 1 to 7, the plurality of first photoelectric converters are electrically connected in series.

[0268] According to technology 8, voltage is easily obtained by power generation.

[0269] (Technique 9)

[0270] According to any one of techniques 1 to 8, the photovoltaic power generation system, the first photoelectric converter includes a perovskite compound.

[0271] The structure of technique 9 is a structural example.

[0272] (Technique 10)

[0273] The photovoltaic power generation system according to any one of technologies 1 to 9 comprises a control device, a first DC / DC converter and a power storage device, wherein the plurality of first photoelectric converters, the first DC / DC converter and the power storage device are electrically connected in sequence, and when the ratio of the output voltage from the first DC / DC converter to the power storage device to the input voltage from the plurality of first photoelectric converters to the first DC / DC converter is defined as a first transformation ratio, the control device controls the first transformation ratio so that the output voltage follows a target value.

[0274] According to the technique 10, the charging efficiency when charging the power storage device with the electric power generated by the plurality of first photoelectric converters can be maintained at a high value.

[0275] (Technology 11)

[0276] The photovoltaic power generation system according to any one of techniques 1 to 10 includes a guide that moves at least one of the first structure and the second structure in the first direction while being engaged with the guide.

[0277] The structure of technique 11 is a structural example.

[0278] (Technology 12)

[0279] According to any one of technologies 1 to 11, the second structure has at least one second photoelectric converter and a second support frame supporting the at least one second photoelectric converter, the second support frame includes a pair of frames extending in the first direction and a connecting frame connecting the pair of frames, and when the movement of the second structure relative to the first structure in the first direction is defined as relative movement, the relative movement realizes a state in which at least one of the multiple first photoelectric converters overlaps with the connecting frame when observed from the third direction, and when the average value of the light transmittance in the wavelength region above 400nm and below 800nm is defined as a specific light transmittance, the specific light transmittance of the connecting frame in the third direction is higher than the specific light transmittance of the pair of frames in the third direction.

[0280] According to the technique 12, the connection frame is less likely to obstruct the light incident on the plurality of first photoelectric converters. On the other hand, by hiding the wiring etc. behind the pair of frames, an excellent aesthetic can be achieved. In addition, the pair of frames can be connected to the first photoelectric converter. Figure 2A The connection box can be connected with the combination of the fifth box 128A and the sixth box 128B in the example of FIG. Figure 2A The example corresponds to the seventh box 128C or the eighth box 128D.

[0281] (Technology 13)

[0282] A photovoltaic power generation system comprises: a first structure having a first substrate and a plurality of first photoelectric converters supported by the first substrate; and a second structure having at least one light-shielding body; the plurality of first photoelectric converters each extend in a first direction as a length direction, the plurality of first photoelectric converters are arranged in a second direction orthogonal to the first direction, and when viewed from a third direction orthogonal to the first direction and the second direction, the plurality of first photoelectric converters are arranged in an area larger than 50% of the area of the first substrate.

[0283] Technology 13 is suitable for ensuring the power generated by the photovoltaic power generation system.

[0284] (Technique 14)

[0285] According to the photovoltaic power generation system described in Technology 13, the second structural body is a screen window or a shutter.

[0286] The structure of technique 14 is a structural example.

[0287] (Technology 15)

[0288] According to the photovoltaic power generation system described in technology 13 or 14, when the average value of the light transmittance in the wavelength range of 400 nm to 800 nm is defined as the specific light transmittance, the specific light transmittance of the at least one light-shielding body in the third direction is 90% or less.

[0289] The structure of technology 15 is a structural example.

[0290] (Technology 16)

[0291] According to any one of technologies 13 to 15, the photovoltaic power generation system, when viewed from the third direction, defines the overall area of one of the multiple first photoelectric converters as a first reference area, defines the area of overlap between the one first photoelectric converter and the at least one light-shielding body as a first overlapping area, defines the ratio of the first overlapping area to the first reference area as a first overlapping rate, and defines the movement of the second structure relative to the first structure in the first direction as relative movement. When the relative movement increases the area of overlap between the first structure and the second structure as more than 50% of the area of the first structure when viewed from the third direction, the following states are sequentially realized: a state in which the first overlapping rate of each of the multiple first photoelectric converters is greater than 0% and less than 50%; and a state in which the first overlapping rate of each of the multiple first photoelectric converters is greater than 50% and less than 100%.

[0292] Technology 16 is suitable for improving the reliability of photovoltaic power generation systems.

[0293] (Technology 17)

[0294] According to any one of technologies 13 to 16, the photovoltaic power generation system, when observing from the third direction, defines the overall area of one of the multiple first photoelectric converters as a first reference area, defines the area where the one first photoelectric converter overlaps with the at least one light-shielding body as a first overlapping area, defines the ratio of the first overlapping area to the first reference area as a first overlapping rate, and defines the movement of the second structure relative to the first structure in the first direction as relative movement, so that the relative movement does not cause the multiple first photoelectric converters to simultaneously produce a first photoelectric converter with the first overlapping rate of 0% and a first photoelectric converter with the first overlapping rate of 100%.

[0295] Technology 17 is suitable for improving the reliability of photovoltaic power generation systems.

[0296] (Technology 18)

[0297] The photovoltaic power generation system according to any one of technologies 13 to 17 is provided with a stopper, which defines the movement of the second structure relative to the first structure in the first direction as relative movement, defines the overall area of one of the multiple first photoelectric converters when observed from the third direction as a first reference area, defines the area of overlap between the one first photoelectric converter and the at least one light-shielding body when observed from the third direction as a first overlapping area, and defines the ratio of the first overlapping area to the first reference area as a first overlap ratio. When the stopper limits the relative position of the second structure relative to the first structure achieved by the relative movement to a first range, the relative movement in the first range does not simultaneously produce the first photoelectric converter with the first overlap ratio of 0% and the first photoelectric converter with the first overlap ratio of 100%.

[0298] Technology 18 is suitable for improving the reliability of photovoltaic power generation systems.

[0299] In any of techniques 1 to 18,

[0300] (a) The first photoelectric converter may be a continuous body extending in the first direction as its longitudinal direction.

[0301] (b) The first photoelectric converter may be the plurality of photoelectric conversion elements arranged in the first direction, each of the photoelectric conversion elements at least partially overlaps with the continuous structure when viewed from the third direction, and the continuous structure constitutes at least a portion of a path electrically connecting the plurality of photoelectric conversion elements, or

[0302] (c) It may be that the first photoelectric converter is a plurality of photoelectric conversion elements arranged in the first direction, a plurality of prescribed structures are arranged in the first direction, the photoelectric conversion element is arranged between the first electrode and the second electrode in the third direction in each prescribed structure, and the prescribed structures adjacent to each other in the first direction are separated by grooves.

[0303] Industrial Applicability

[0304] The photovoltaic power generation system disclosed herein can be applied to building materials such as windows.

Claims

1. A photovoltaic power generation system, characterized in that: have: A first structure having a plurality of first photoelectric converters; and The second structure has at least one second photoelectric converter, Each of the plurality of first photoelectric converters extends along a first direction as its longitudinal direction. The direction in which the plurality of first photoelectric converters are arranged is a second direction orthogonal to the first direction. When viewed from a third direction orthogonal to the first direction and the second direction, at least a portion of the at least one second photoelectric converter can overlap with at least a portion of the plurality of first photoelectric converters.

2. The photovoltaic power generation system according to claim 1, characterized in that: The at least one second photoelectric converter is a plurality of second photoelectric converters, Each of the plurality of second photoelectric converters extends with the first direction as its longitudinal direction. The direction in which the plurality of second photoelectric converters are arranged is the second direction.

3. The photovoltaic power generation system according to claim 1, characterized in that: The first structure includes a first substrate supporting the plurality of first photoelectric converters. The plurality of first photoelectric converters are arranged in a region larger than 50% of the area of the first substrate when viewed from the third direction.

4. The photovoltaic power generation system according to claim 1, characterized in that: The first structure includes a first support frame that supports the plurality of first photoelectric converters.

5. The photovoltaic power generation system according to claim 1, characterized in that: A third structure is provided, wherein the third structure has a plurality of third photoelectric converters. The third structure is located between the first structure and the second structure in the third direction.

6. The photovoltaic power generation system according to claim 1, characterized in that: The first structure has a first substrate made of glass or resin. The first substrate is located between the second structure and the plurality of first photoelectric converters in the third direction.

7. The photovoltaic power generation system according to claim 1, characterized in that: The dimension of the first photoelectric converter in the second direction is larger than 50% of the pitch at which the plurality of first photoelectric converters are arranged in the second direction.

8. The photovoltaic power generation system according to claim 1, characterized in that: The plurality of first photoelectric converters are electrically connected in series.

9. The photovoltaic power generation system according to claim 1, characterized in that: The first photoelectric converter includes a perovskite compound.

10. The photovoltaic power generation system according to claim 1, characterized in that: A control device, a first DC / DC converter, and a power storage device are provided. The plurality of first photoelectric converters, the first DC / DC converter, and the power storage device are electrically connected in sequence. When a ratio of an output voltage from the first DC / DC converter to the power storage device to an input voltage from the plurality of first photoelectric converters to the first DC / DC converter is defined as a first transformation ratio, The control device controls the first transformation ratio so that the output voltage follows a target value.

11. The photovoltaic power generation system according to claim 1, characterized in that: With guides, The guide moves at least one of the first structure and the second structure in the first direction while being engaged with the at least one of the first structure and the second structure.

12. The photovoltaic power generation system according to claim 1, characterized in that: The second structure includes at least one second photoelectric converter and a second support frame that supports the at least one second photoelectric converter. The second support frame includes: a pair of frames extending in the first direction; as well as a connection frame connecting the pair of frames, When the relative movement is defined as the movement of the second structure relative to the first structure in the first direction, The relative movement realizes a state where at least one of the plurality of first photoelectric converters overlaps with the connection frame when viewed from the third direction. When the average value of the light transmittance in the wavelength range of 400 nm to 800 nm is defined as the specific light transmittance, The specific light transmittance of the connection frame in the third direction is higher than the specific light transmittance of the pair of frames in the third direction.

13. A photovoltaic power generation system, characterized in that: have: a first structure including a first substrate and a plurality of first photoelectric converters supported by the first substrate; and The second structure has at least one light-shielding body. Each of the plurality of first photoelectric converters extends along a first direction as its longitudinal direction. The direction in which the plurality of first photoelectric converters are arranged is a second direction orthogonal to the first direction. The plurality of first photoelectric converters are arranged in a region larger than 50% of the area of the first substrate when viewed from a third direction perpendicular to the first direction and the second direction.

14. The photovoltaic power generation system according to claim 13, characterized in that: The second structure is a screen window or a shutter.

15. The photovoltaic power generation system according to claim 13, characterized in that: When the average value of the light transmittance in the wavelength range of 400 nm to 800 nm is defined as the specific light transmittance, The specific light transmittance of the at least one light-blocking body in the third direction is 90% or less.

16. The photovoltaic power generation system according to claim 13, characterized in that: The entire area of one of the plurality of first photoelectric converters when viewed from the third direction is defined as a first reference area. The area where the one first photoelectric converter and the at least one light-shielding body overlap when viewed from the third direction is defined as a first overlapping area, The ratio of the first overlapping area to the first reference area is defined as a first overlapping ratio, When the relative movement is defined as the movement of the second structure relative to the first structure in the first direction, The relative movement that increases the overlapping area between the first structure and the second structure to more than 50% of the area of the first structure when viewed from the third direction sequentially realizes the following states: The first overlap ratio of each of the plurality of first photoelectric converters is greater than 0% and less than 50%; and The first overlap ratio of each of the plurality of first photoelectric converters is greater than 50% and less than 100%.

17. The photovoltaic power generation system according to claim 13, characterized in that: The entire area of one of the plurality of first photoelectric converters when viewed from the third direction is defined as a first reference area. The area where the one first photoelectric converter and the at least one light-shielding body overlap when viewed from the third direction is defined as a first overlapping area, The ratio of the first overlapping area to the first reference area is defined as a first overlapping ratio, When the relative movement is defined as the movement of the second structure relative to the first structure in the first direction, The relative movement prevents a first photoelectric converter having the first overlap rate of 0% and a first photoelectric converter having the first overlap rate of 100% from being simultaneously generated among the plurality of first photoelectric converters.

18. The photovoltaic power generation system according to claim 13, characterized in that: With stopper, The movement of the second structure relative to the first structure in the first direction is defined as relative movement, The entire area of one of the plurality of first photoelectric converters when viewed from the third direction is defined as a first reference area. The area where the one first photoelectric converter and the at least one light-shielding body overlap when viewed from the third direction is defined as a first overlapping area, When the ratio of the first overlapping area to the first reference area is defined as a first overlapping ratio, The stopper limits the relative position of the second structure with respect to the first structure achieved by the relative movement to a first range, The relative movement in the first range does not simultaneously produce the first photoelectric converter having the first overlap rate of 0% and the first photoelectric converter having the first overlap rate of 100%.

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