Solar cell modules

Abstract

To provide a solar cell module with a replaceable terminal box. [Solution] A solar cell module 1 according to one aspect of the present disclosure comprises a power generation module 10 having photovoltaic cells 15, and a terminal box 20 provided on the end face around the power generation module 10. Busbar wiring 16_1 and 16_2 taken out from the end face of the power generation module 10 are detachably connected to electrode terminals 32_1 and 32_2 provided on the terminal box 20, respectively, and the terminal box 20 is detachably attached to the end face of the power generation module 10.

Description

Technical Field

[0001] This disclosure relates to a solar cell module.

Background Art

[0002] In recent years, in order to utilize natural energy, the use of solar cell modules provided with a plurality of photovoltaic cells has been promoted. In a solar cell module provided with a plurality of photovoltaic cells, in order to extract the power generated by the photovoltaic cells to the outside, wiring connected to the photovoltaic cells is taken out from the inside of the solar cell module to the outside. And the wiring taken out in this way is connected to the electrode terminals provided in the terminal box.

[0003] Patent Document 1 discloses a technique capable of realizing a longer life of a terminal box for a solar cell module. In the technique disclosed in Patent Document 1, the terminal box is fixed to the surface of the solar cell panel.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a solar cell module, the power generated by the photovoltaic cells is taken out to the outside via a terminal box. Parts such as electrode terminals, output cables, and bypass diodes are provided in the terminal box. In the technique disclosed in Patent Document 1, the terminal box is fixed to the surface of the solar cell panel.

[0006] However, terminal boxes can malfunction or deteriorate over time. Therefore, if the terminal box is fixed to the surface of the solar panel, as in the technology disclosed in Patent Document 1, there is a problem in that the terminal box cannot be replaced.

[0007] In view of the above issues, the purpose of this disclosure is to provide a solar cell module with a replaceable terminal box. [Means for solving the problem]

[0008] A solar cell module relating to one aspect of this disclosure is as follows:

[0009] [1] A power generation module having solar cells, The power generation module comprises a terminal box provided on the end face surrounding it, The positive-side first busbar wiring, which is taken out from the end face of the power generation module, is detachably connected to the positive-side first electrode terminal of the terminal box. The negative-side second busbar wiring, which is taken out from the end face of the power generation module, is detachably connected to the negative-side second electrode terminal of the terminal box. The terminal box is detachably attached to the end face of the power generation module. Solar cell module.

[0010] [2] The aforementioned terminal box is On the first main surface side of the power generation module, a first extension extends toward the center of the power generation module, The power generation module comprises a second extension that extends toward the center of the power generation module on the second main surface side opposite to the first main surface of the power generation module, The first and second extensions of the terminal box are each provided with holes, The power generation module is provided with through holes at positions corresponding to the holes provided in the first and second extensions, The terminal box is attached to the power generation module by providing fixing members in the holes provided in the first and second extensions of the terminal box and in the through holes provided in the power generation module. [1] The solar cell module described above.

[0011] [3] The solar cell module according to [2], wherein the holes provided in the first and second extensions are elongated holes extending toward the center of the power generation module.

[0012] [4] A sealing member is provided between the terminal box facing the power generation module and the end face of the power generation module, as described in [2] or [3], for the solar cell module.

[0013] [5] The aforementioned fixing member is a screw, The solar cell module according to any one of [2] to [4], wherein the terminal box is attached to the power generation module by providing screws in the holes provided in the first and second extensions of the terminal box and in the through holes provided in the power generation module.

[0014] [6] The power generation module further comprises a mounting base fixed to the end face, The central part of the mounting base is provided with a hole through which the first and second busbar wiring, which are taken out from the end face of the power generation module, can pass. The terminal box is attached to the power generation module via the mounting base. [1] The solar cell module described above.

[0015] [7] The mounting base is fixed to the end face of the power generation module using an adhesive member. The terminal box is fixed to the mounting base using a fixing member. [6] The solar cell module described above.

[0016] [8] The fixing member is a screw, The terminal box includes first and second protruding portions that protrude from both sides in the longitudinal direction of the terminal box, The terminal box is fixed to the mounting base by providing the screw in holes provided in the first and second protruding portions. The solar cell module according to [6] or [7].

[0017] [9] A sealing member is provided between the surface of the terminal box on the power generation module side and the mounting base. The solar cell module according to any one of [6] to [8].

[0018]

[10] The power generation module, A first light-transmitting member, A second light-transmitting member arranged to face the first light-transmitting member, An intermediate adhesive layer disposed between the first light-transmitting member and the second light-transmitting member, And the solar cell disposed between the first light-transmitting member and the second light-transmitting member. The solar cell module according to any one of [1] to [9]. The solar cell module according to any one of [1] to [9].

[0019]

[11] The first and second bus bar wirings are fixed to the first and second electrode terminals using a crimping member. The solar cell module according to any one of [1] to [9].

[0020]

[12] The first and second bus bar wirings are fixed to the first and second electrode terminals using clips. The solar cell module according to any one of [1] to [9].

[0021]

[13] The solar cell module according to any one of [1] to [9], wherein the first and second busbar wirings are secured to the first and second electrode terminals using screws.

[0022]

[14] The solar cell module according to any one of [1] to [9], wherein the first and second busbar wirings are fixed to the first and second electrode terminals using solder.

[0023]

[15] The solar cell module according to [4] or [9], wherein the sealing member is at least one selected from the group consisting of butyl, silicon resin, urethane resin, fluororesin, and epoxy resin. [Effects of the Invention]

[0024] This disclosure makes it possible to provide a solar cell module with a replaceable terminal box. [Brief explanation of the drawing]

[0025] [Figure 1] This is a front view showing a solar cell module according to Embodiment 1. [Figure 2] This is a cross-sectional view showing a solar cell module according to Embodiment 1. [Figure 3] This is a bottom view of the terminal box of the solar cell module according to Embodiment 1. [Figure 4] This is an enlarged front view showing a solar cell module according to Embodiment 1. [Figure 5] This is a cross-sectional view showing the busbar wiring connected to the electrode terminals. [Figure 6] This is a cross-sectional view showing the busbar wiring connected to the electrode terminals. [Figure 7] This is a cross-sectional view showing the busbar wiring connected to the electrode terminals. [Figure 8] This is a perspective view showing the assembly process of a solar cell module according to Embodiment 1. [Figure 9A]This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 1. [Figure 9B] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 1. [Figure 9C] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 1. [Figure 9D] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 1. [Figure 10] This is a front view showing a solar cell module according to Embodiment 2. [Figure 11] This is a cross-sectional view showing a solar cell module according to Embodiment 2. [Figure 12] This is an enlarged front view showing a solar cell module according to Embodiment 2. [Figure 13A] This is a perspective view showing the assembly process of a solar cell module according to Embodiment 2. [Figure 13B] This is a perspective view showing the assembly process of a solar cell module according to Embodiment 2. [Figure 14A] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 2. [Figure 14B] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 2. [Figure 14C] This is a cross-sectional view showing the assembly process of a solar cell module according to Embodiment 2. [Modes for carrying out the invention]

[0026] <Embodiment 1> The present disclosure will be described below with reference to the drawings. Figure 1 is a front view showing a solar cell module according to Embodiment 1. Figure 2 is a cross-sectional view taken along the cutting line II-II in Figure 1.

[0027] As shown in Figure 1, the solar cell module 1 according to this embodiment comprises a power generation module 10 having a photovoltaic cell 15, and a terminal box 20 provided on the end face around the power generation module 10. In the configuration example shown in Figure 2, the power generation module 10 comprises a first light-transmitting member 11, a second light-transmitting member 12 arranged opposite the first light-transmitting member 11, an intermediate adhesive layer 13 arranged between the first light-transmitting member 11 and the second light-transmitting member 12, and a photovoltaic cell 15 arranged between the first light-transmitting member 11 and the second light-transmitting member 12. The first light-transmitting member 11 and the second light-transmitting member 12 can be made of glass plates or resin sheets. For example, if both the first light-transmitting member 11 and the second light-transmitting member 12 are made of glass plates, it becomes laminated glass. In the configuration example shown in Figure 2, as an example, a configuration is shown in which a photovoltaic cell 15 is sealed inside the laminated glass.

[0028] In this embodiment, an example configuration in which a solar cell 15 is enclosed inside laminated glass will be described as the power generation module 10. The solar cell module 1 (laminated glass) according to this embodiment can be suitably used as a building material such as window glass in buildings. Note that the configuration described below is just one example, and in this embodiment, a power generation module other than the configuration shown in Figures 1 and 2 may be used as the power generation module 10.

[0029] As shown in Figure 2, the power generation module 10 comprises a first glass plate 11, a second glass plate 12, and an intermediate adhesive layer 13 placed between the first glass plate 11 and the second glass plate 12. The power generation module 10 is constructed by stacking the first glass plate 11, the intermediate adhesive layer 13, and the second glass plate 12 in the z-axis direction, with the first glass plate 11 and the second glass plate 12 being bonded to each other using the intermediate adhesive layer 13. Multiple photovoltaic cells 15 are enclosed between the first glass plate 11 and the second glass plate 12, that is, inside the intermediate adhesive layer 13.

[0030] The thickness of the first glass plate 11 and the second glass plate 12 is, for example, 4 mm or more and 12 mm or less, respectively. For example, chemically strengthened glass may be used for the first glass plate 11 and the second glass plate 12. When chemically strengthened glass is used, the first glass plate 11 and the second glass plate 12 can be made lighter while maintaining their strength. In this embodiment, air-cooled tempered glass may also be used for the first glass plate 11 and the second glass plate 12.

[0031] The intermediate adhesive layer 13 is positioned so as to be sandwiched between the first glass plate 11 and the second glass plate 12. In other words, the first glass plate 11 and the second glass plate 12 are bonded together using the intermediate adhesive layer 13. For example, when forming a power generation module 10, the first glass plate 11, the intermediate adhesive layer 13, the photovoltaic cell 15, the intermediate adhesive layer 13, and the second glass plate 12 are stacked in that order, and the power generation module 10 is formed by heating and pressing this stack together. At this time, the intermediate adhesive layer 13 placed below the photovoltaic cell 15 and the intermediate adhesive layer 13 placed above the photovoltaic cell 15 are heated and melted, so in the completed power generation module 10 there is only one layer of intermediate adhesive layer 13.

[0032] The thickness of the intermediate adhesive layer 13 is, for example, 0.38 mm to 3.81 mm. The intermediate adhesive layer 13 may be made of EVA (ethylene-vinyl acetate copolymer) resin, PVB (polyvinyl butyral) resin, ionomer resin, COP (cycloolefin polymer), polyurethane, PVC (polyvinyl chloride), POE (polyolefin elastomer), TPO (olefin-based thermoplastic elastomer), etc. Alternatively, the intermediate adhesive layer 13 may be made by combining these materials.

[0033] The photovoltaic cell 15 can be constructed using photovoltaic cells such as silicon-based monocrystalline type, silicon-based polycrystalline type, amorphous silicon type, thin-film silicon type, CIGS type, organic thin-film type, dye-sensitized type, and perovskite type. As shown in Figure 1, multiple photovoltaic cells 15 are arranged in the x-axis and y-axis directions. In the example configuration shown in Figure 1, the shape of each photovoltaic cell 15 is rectangular. For example, the shape of each photovoltaic cell 15 may be square, rectangular, or circular. Also, for example, a single-sided light-receiving type photovoltaic cell may be used as the photovoltaic cell 15. In this case, the light-receiving surface of the photovoltaic cell 15 is positioned to face outward (towards the negative z-axis). Alternatively, a double-sided light-receiving type photovoltaic cell may be used as the photovoltaic cell 15.

[0034] In this embodiment, photovoltaic cells may also be formed on the inner surface of at least one of the first glass plate 11 and the second glass plate 12. For example, a perovskite-type photovoltaic cell may be coated onto the inner surface of at least one of the first glass plate 11 and the second glass plate 12. In this embodiment, the shape and type of the photovoltaic cell 15 can be determined arbitrarily.

[0035] As shown in Figures 1 and 2, the terminal box 20 is provided on the end face around the power generation module 10. In the configuration example shown in Figures 1 and 2, the terminal box 20 is provided on the longitudinal end of the power generation module 10 (the end on the positive side in the y-axis direction). The terminal box 20 can be provided at any position on the end face around the power generation module 10. In this embodiment, the terminal box 20 is detachably attached to the end face of the power generation module 10.

[0036] As shown in Figure 2, the terminal box 20 includes an extension 21_1 that extends toward the center of the power generation module 10 (negative y-axis direction) on one main surface side of the power generation module 10 (positive z-axis side). In other words, the terminal box 20 includes an extension 21_1 that extends toward the center of the first glass plate 11 on the main surface of the first glass plate 11. Similarly, the terminal box 20 includes an extension 21_2 that extends toward the center of the power generation module 10 (negative y-axis direction) on the other main surface side of the power generation module 10 (negative z-axis side). In other words, the terminal box 20 includes an extension 21_2 that extends toward the center of the second glass plate 12 on the main surface of the second glass plate 12.

[0037] As shown in Figure 2, holes 22_1 and 22_2 are provided in the extensions 21_1 and 21_2 of the terminal box 20, respectively. The power generation module 10 also has through holes 18 at positions corresponding to the holes 22_1 and 22_2 in the extensions 21_1 and 21_2. In other words, the power generation module 10 has through holes 18 that penetrate the first glass plate 11, the second glass plate 12, and the intermediate adhesive layer 13. The terminal box 20 is attached to the power generation module 10 by providing fixing members 25 to the holes 22_1 and 22_2 in the extensions 21_1 and 21_2 of the terminal box 20 and the through holes 18 in the power generation module 10.

[0038] As shown in Figure 2, in this embodiment, a sealing member 23 is provided between the terminal box 20's side facing the power generation module 10 (bottom surface) and the end surface (top surface) of the power generation module 10. Figure 3 is a bottom view of the terminal box of the solar cell module according to this embodiment. As shown in Figure 3, a sealing member 23 is provided on the bottom surface of the terminal box 20 (the surface on the negative side in the y-axis direction) so as to surround the terminal box 20. By providing the sealing member 23 in this way, the inside of the terminal box 20 can be protected from the external environment (moisture and dust). The material of the sealing member 23 can be at least one selected from the group consisting of butyl, silicone resin, urethane resin, fluororesin, and epoxy resin.

[0039] For example, in this embodiment, as shown in Figures 1 and 2, the holes 22_1 and 22_2 provided in the extensions 21_1 and 21_2, respectively, may be elongated holes (elongated holes extending in the y-axis direction) that extend towards the center of the power generation module 10. When the holes 22_1 and 22_2 are elongated in this way, the positioning of the holes 22_1 and 22_2 of the power generation module 10 with respect to the through hole 18 of the power generation module 10 can be easily achieved. For example, the sealing performance of the terminal box 20 can be improved by fixing the terminal box 20 to the power generation module 10 while pressing the terminal box 20 towards the negative side in the y-axis direction to compress the sealing member 23.

[0040] For example, the fixing member 25 may be a screw, and the terminal box 20 can be attached to the power generation module 10 by providing the fixing member 25 (screw) in the holes 22_1 and 22_2 provided in the terminal box 20 and the through hole 18 provided in the power generation module 10. For example, the fixing member 25 may be made up of a bolt and nut.

[0041] Furthermore, a cover 27 is provided on the top surface (the positive side in the y-axis direction) of the terminal box 20. The cover 27 is detachably attached to the terminal box 20. Therefore, by removing the cover 27, the electrode terminals 32_1 and 32_2, which will be described later, can be connected to the busbar wirings 16_1 and 16_2. As shown in Figure 3, the cover 27 is attached to the top surface of the terminal box 20 via a sealing member 28. The sealing member 28 is provided around the inside of the terminal box 20. By providing the sealing member 28 in this way, the inside of the terminal box 20 can be protected from the external environment (moisture and dust). A rubber gasket or the like can be used for the sealing member 28.

[0042] As shown in the bottom view of Figure 3, the terminal box 20 comprises a terminal block 31, electrode terminals 32_1 and 32_2, a bypass diode 33, and output cables 34_1 and 34_2. Electrode terminals 32_1 and 32_2 are fixed to the terminal block 31. For example, electrode terminal 32_1 is the positive electrode terminal, and electrode terminal 32_2 is the negative electrode terminal. Electrode terminals 32_1 and 32_2 are electrically connected to output cables 34_1 and 34_2, respectively. Therefore, the power generated by the solar cell module 1 is output to the outside using output cables 34_1 and 34_2. Note that the location from which output cables 34_1 and 34_2 are taken out is not limited to the location shown in Figure 3, but can be taken out from any location on the terminal box 20.

[0043] Furthermore, a bypass diode 33 is provided between electrode terminals 32_1 and 32_2. This allows the current to pass through the bypass diode 33 instead of the solar cell 15 if the solar cell 15 fails. In other words, if the output cables 34_1 and 34_2 are connected to other solar cell modules, a failure in the solar cell 1 of solar cell module 1 will prevent current from flowing to solar cell module 1, affecting other solar cell modules. On the other hand, if the bypass diode 33 is provided, a failure in the solar cell 15 will cause the current to flow through the bypass diode 33 instead of the solar cell 15, thus preventing damage to other solar cell modules.

[0044] Figure 4 is an enlarged front view showing a solar cell module according to this embodiment. In Figure 4, the terminal box 20 is shown as if viewed through to illustrate its interior.

[0045] As shown in Figure 4, the positive-side busbar wiring 16_1, which is taken out from the end face of the power generation module 10, is connected to the positive-side electrode terminal 32_1 of the terminal box 20. Similarly, the negative-side busbar wiring 16_2, which is taken out from the end face of the power generation module 10, is connected to the negative-side electrode terminal 32_2 of the terminal box 20. In this embodiment, the busbar wirings 16_1 and 16_2 of the power generation module 10 and the electrode terminals 32_1 and 32_2 of the terminal box 20 are detachably connected.

[0046] For example, in this embodiment, as shown in Figure 4, the busbar wirings 16_1 and 16_2 may be fixed to the electrode terminals 32_1 and 32_2 using crimping members 35_1 and 35_2. The crimping members 35_1 and 35_2 are configured so that their tips can be displaced in the z-axis direction. When fixing the busbar wirings 16_1 and 16_2 to the electrode terminals 32_1 and 32_2 using crimping members 35_1 and 35_2, the busbar wirings 16_1 and 16_2 are placed on the electrode terminals 32_1 and 32_2, and then the tips of the crimping members 35_1 and 35_2 are displaced to the negative side in the z-axis direction, and the busbar wirings 16_1 and 16_2 are pressed against the electrode terminals 32_1 and 32_2 using the crimping members 35_1 and 35_2 to fix them in place. Furthermore, when removing the busbar wirings 16_1 and 16_2 from the electrode terminals 32_1 and 32_2, the tips of the crimping members 35_1 and 35_2 are displaced in the positive z-axis direction to open the busbar wirings 16_1 and 16_2. The crimping members 35_1 and 35_2 can be made from metal materials such as copper, iron, stainless steel, or aluminum. For example, in this embodiment, the electrode terminals 32_1 and 32_2 and the crimping members 35_1 and 35_2 may be formed integrally. In this configuration, by processing a part of the electrode terminals 32_1 and 32_2 (corresponding to the crimping members 35_1 and 35_2) to bend, the busbar wirings 16_1 and 16_2 can be fixed to the electrode terminals 32_1 and 32_2 using the crimping members 35_1 and 35_2.

[0047] In this embodiment, as shown in Figure 5, the busbar wiring 16 may also be fixed to the electrode terminal 32 using screws 36. In this specification, busbar wirings 16_1 and 16_2 are collectively referred to as busbar wiring 16. The same applies to other components. Specifically, when fixing the busbar wiring 16 to the electrode terminal 32, the busbar wiring 16 is placed on the electrode terminal 32, and then the screws 36 are tightened to fix the busbar wiring 16 to the electrode terminal 32. When removing the busbar wiring 16 from the electrode terminal 32, the screws 36 are loosened and the screws 36 are removed from the electrode terminal 32. It is preferable to pre-form screw holes in the busbar wiring 16 for passing the screws 36 through.

[0048] In this embodiment, as shown in Figure 6, the busbar wiring 16 may also be fixed to the electrode terminal 32 using solder 37. Specifically, when fixing the busbar wiring 16 to the electrode terminal 32, the busbar wiring 16 is placed on the electrode terminal 32, and then the busbar wiring 16 is fixed to the electrode terminal 32 using solder 37. When removing the busbar wiring 16 from the electrode terminal 32, the solder 37 is melted to remove the busbar wiring 16 from the electrode terminal 32. Lead-free solder or leaded solder can be used for the solder 37. From the viewpoint of durability, it is preferable to use lead-free solder.

[0049] In this embodiment, as shown in Figure 7, the busbar wiring 16 and the electrode terminal 32 may also be fixed using a clip 38. Specifically, as shown in Figure 7, with the tip of the electrode terminal 32 and the tip of the busbar wiring 16 parallel to each other, the tip of the electrode terminal 32 and the tip of the busbar wiring 16 are clamped and fixed using the clip 38. When removing the busbar wiring 16 from the electrode terminal 32, the clip 38 is removed. The clip 38 can be made of a metal material such as copper, iron, stainless steel, or aluminum. In the configuration shown in Figure 7, the busbar wiring 16 can be removed from the electrode terminal 32 by pulling out the clip 38, making it easy to remove the busbar wiring 16.

[0050] Figure 8 is a perspective view showing the assembly process of the solar cell module according to this embodiment. Figures 9A to 9D are cross-sectional views showing the assembly process of the solar cell module according to this embodiment. The operation of attaching the terminal box 20 to the end face of the power generation module 10 will be described below.

[0051] As shown in Figure 8, the busbar wiring 16_1 and 16_2 are routed out from the end face of the power generation module 10. The power generation module 10 has a through hole 18. Also, as shown in Figures 8 and 9A, the terminal box 20 is provided with extensions 21_1 and 21_2. Each of the extensions 21_1 and 21_2 has holes 22_1 and 22_2. Before attaching the terminal box 20 to the end face of the power generation module 10, the cover 27 is removed from the terminal box 20.

[0052] When attaching the terminal box 20 to the end face of the power generation module 10, the terminal box 20 is fitted to the end face of the power generation module 10 as shown in Figure 9B. In other words, the terminal box 20 is positioned so that the power generation module 10 is sandwiched between the extensions 21_1 and 21_2 of the terminal box 20. At this time, the terminal box 20 is positioned on the end face of the power generation module 10 so that the positions of the through holes 18 of the power generation module 10 and the holes 22_1 and 22_2 of the terminal box 20 overlap.

[0053] Subsequently, with the terminal box 20 pushed to the negative side in the y-axis direction to compress the sealing member 23, fixing members 25 are provided in the through hole 18 of the power generation module 10 and the holes 22_1 and 22_2 of the terminal box 20, and the terminal box 20 is fixed to the end face of the power generation module 10 as shown in Figure 9C. For example, the fixing members 25 may consist of a bolt and a nut. In this case, a bolt may be passed through the through hole 18 of the power generation module 10 and the holes 22_1 and 22_2 of the terminal box 20, and a nut may be provided on the end of the bolt (the end on the negative side in the z-axis direction) to fix it in place.

[0054] Subsequently, using the method described above, the busbar wirings 16_1 and 16_2 of the power generation module 10 are connected to the electrode terminals 32_1 and 32_2 of the terminal box 20, respectively. Then, as shown in Figure 9D, the cover 27 is attached to the top surface of the terminal box 20 via the sealing member 28.

[0055] When replacing the terminal box 20, first remove the cover 27 from the top surface of the terminal box 20. Then, disconnect the busbar wiring 16_1 and 16_2 of the power generation module 10 from the electrode terminals 32_1 and 32_2 of the terminal box 20. After removing the fixing members 25 from the through hole 18 of the power generation module 10 and the holes 22_1 and 22_2 of the terminal box 20, the terminal box 20 can be removed from the power generation module 10 by displacing it in the positive y-axis direction.

[0056] As described above, in this embodiment, the busbar wirings 16_1 and 16_2 are detachably connected to the electrode terminals 32_1 and 32_2 of the terminal box 20. The terminal box 20 is also detachably attached to the end face of the power generation module 10. Therefore, this disclosure provides a solar cell module with a replaceable terminal box.

[0057] As explained in the background technology section, in solar cell modules, the electricity generated by the photovoltaic cells is taken out to the outside via a terminal box. The terminal box contains components such as electrode terminals, output cables, and bypass diodes, but the terminal box can malfunction or deteriorate over time. Therefore, if the terminal box is fixed to the surface of the solar panel, there is a problem in that the terminal box cannot be replaced. In other words, if the busbar wiring and the electrode terminals of the terminal box are connected in a way that prevents removal, or if the terminal box is directly bonded to the power generation module with adhesive, the terminal box cannot be removed, resulting in poor maintainability.

[0058] In contrast, in this embodiment, the busbar wirings 16_1 and 16_2 are detachably connected to the electrode terminals 32_1 and 32_2 of the terminal box 20. Furthermore, the terminal box 20 is detachably attached to the end face of the power generation module 10. Therefore, this disclosure provides a solar cell module with a replaceable terminal box.

[0059] For example, the terminal box 20 is equipped with components such as electrode terminals 32_1 and 32_2, a bypass diode 33, and output cables 34_1 and 34_2. In this embodiment, if any of these components fail, the entire terminal box 20 can be replaced. Therefore, the solar cell module can be used for a long period of time.

[0060] In this embodiment, at least one of the first light-transmitting member 11 and the second light-transmitting member 12 may be made of a resin sheet. In this case, the resin sheet can be made of ETFE (ethylene-tetrafluoroethylene copolymer), ECTFE (ethylene-chlorotrifluoroethylene copolymer), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), PET (polyethylene terephthalate), PS (polystyrene), PC (polycarbonate), etc.

[0061] <Embodiment 2> Next, Embodiment 2 will be described. Figures 10 and 11 are a front view and a cross-sectional view, respectively, showing a solar cell module according to Embodiment 2. Figure 12 is an enlarged front view showing a solar cell module according to Embodiment 2. In Embodiment 2, the mounting structure of the terminal box 50 is different from that of Embodiment 1. Note that the other configurations are the same as in Embodiment 1, so the same reference numerals are used for the same components, and redundant explanations are omitted.

[0062] As shown in Figures 10 to 12, the solar cell module 2 according to this embodiment comprises a power generation module 10 having photovoltaic cells 15, and a terminal box 50 provided on the end face around the power generation module 10. In the solar cell module 2 according to this embodiment, a mounting base 40 is provided fixed to the end face of the power generation module 10, and the terminal box 50 is attached to the power generation module 10 via the mounting base 40. The mounting base 40 can be made of, for example, a metal material or a resin material.

[0063] The mounting base 40 is fixed to the end face of the power generation module 10 using an adhesive member 41. For example, butyl, silicone resin, urethane resin, epoxy resin, etc., can be used for the adhesive member 41. The terminal box 50 is fixed to the mounting base 40 using a fixing member 55. As shown in Figure 10, the terminal box 50 has protrusions 51_1 and 51_2 that protrude from both sides in the longitudinal direction (x-axis direction) of the terminal box 50. For example, the fixing member 55 may be a screw. Also, the mounting base 40 may have screw holes 45 (see Figure 13A). In this case, the terminal box 50 can be fixed to the mounting base 40 by passing the fixing member (screw) 55 through the holes 52 (see Figure 13A) provided in each of the protrusions 51_1 and 51_2 of the terminal box 50 and fixing the fixing member (screw) 55 in the screw holes 45.

[0064] Furthermore, a sealing member 53 is provided between the terminal box 50 on the side facing the power generation module 10 and the mounting base 40. The sealing member 53 is provided on the bottom surface of the terminal box 50 (the negative side in the y-axis direction) so as to surround the terminal box 50 (i.e., the same configuration as shown in Figure 3). By providing the sealing member 53 in this way, the inside of the terminal box 50 can be protected from the external environment (moisture and dust). The material of the sealing member 53 can be at least one selected from the group consisting of butyl, silicone resin, urethane resin, fluororesin, and epoxy resin.

[0065] Furthermore, as shown in Figures 11 and 13A, a hole 43 is provided in the center of the mounting base 40 through which the busbar wiring 16_1 and 16_2, which are taken out from the end face of the power generation module 10, can pass. In other words, in this embodiment, the busbar wiring 16_1 and 16_2 are guided to the terminal box 50 side by passing through the hole 43 of the mounting base 40.

[0066] Furthermore, as shown in Figure 13A, a cover 27 is provided on the top surface of the terminal box 50. The cover 57 is detachably attached to the terminal box 50. Therefore, by removing the cover 57, the electrode terminals 32_1 and 32_2, which will be described later, can be connected to the busbar wirings 16_1 and 16_2. In this embodiment as well, the cover 57 is attached to the top surface of the terminal box 50 via a sealing member (not shown). Note that the configuration of the cover 57 and the sealing member is the same as in Embodiment 1, so a redundant explanation will be omitted.

[0067] As shown in Figure 12, the busbar wires 16_1 and 16_2, which are led to the terminal box 50, are connected to the electrode terminals 32_1 and 32_2 of the terminal box 50, respectively. The configuration for connecting the busbar wires 16_1 and 16_2 of the power generation module 10 to the electrode terminals 32_1 and 32_2 of the terminal box 50 is the same as the configuration described in Figures 4 to 7 of Embodiment 1, so a redundant explanation will be omitted.

[0068] Figures 13A and 13B are perspective views showing the assembly process of the solar cell module according to this embodiment. Figures 14A to 14C are cross-sectional views showing the assembly process of the solar cell module according to this embodiment. The operation of attaching the terminal box 50 to the end face of the power generation module 10 will be described below.

[0069] As shown in Figure 13A, the busbar wiring 16_1 and 16_2 are routed out from the end face of the power generation module 10. Also, before the terminal box 50 is attached to the end face of the power generation module 10, the cover 57 is removed from the terminal box 50.

[0070] When attaching the terminal box 50 to the end face of the power generation module 10, the mounting base 40 is attached to the end face of the power generation module 10 using an adhesive member 41, as shown in Figures 13A and 14A. As shown in Figure 13B, when the mounting base 40 is attached to the end face of the power generation module 10, the busbar wirings 16_1 and 16_2 pass through the holes 43 of the mounting base 40, and the busbar wirings 16_1 and 16_2 protrude above the mounting base 40 (towards the positive side in the y-axis direction).

[0071] Subsequently, as shown in Figures 13B and 14B, the terminal box 50 is attached to the upper surface (the positive side in the y-axis direction) of the mounting base 40. Figure 14C shows the terminal box 50 attached to the mounting base 40. As shown in Figures 14B and 14C, with the sealing member 53 placed between the terminal box 50 and the mounting base 40, the fixing member (screw) 55 is passed through the holes 52 (see Figure 13A) provided in each of the protrusions 51_1 and 51_2 of the terminal box 50, and the fixing member (screw) 55 is fixed to the mounting base 40 by fixing it to the screw hole 45 (see Figure 13B) of the mounting base 40.

[0072] Subsequently, using the method described in Embodiment 1, the busbar wirings 16_1 and 16_2 of the power generation module 10 are connected to the electrode terminals 32_1 and 32_2 of the terminal box 50, respectively. Then, the cover 57 is attached to the top surface of the terminal box 50 via a sealing member (same as in Figure 9D).

[0073] When replacing the terminal box 50, first remove the cover 57 (see Figures 13A and 13B) from the top of the terminal box 50. Then, disconnect the busbar wiring 16_1 and 16_2 of the power generation module 10 from the electrode terminals 32_1 and 32_2 of the terminal box 50. Next, remove the fixing member 55 and remove the terminal box 50 from the mounting base 40. By performing these steps, the terminal box 50 can be removed from the power generation module 10. In this embodiment, the mounting base 40 may also be removed from the power generation module 10. In other words, in this embodiment, only the terminal box 50 may be replaced, or both the terminal box 50 and the mounting base 40 may be replaced.

[0074] By adopting the configuration described above, it is possible to provide a solar cell module with a replaceable terminal box.

[0075] Although the present invention has been described above in accordance with the above embodiments, the present invention is not limited to the configuration of the above embodiments, and of course includes various modifications, alterations, and combinations that can be made by a person skilled in the art within the scope of the claims of the present patent application. [Explanation of symbols]

[0076] 1. Solar cell module 10 power generation modules 11. First glass plate (first light-transmitting member) 12. Second glass plate (second light-transmitting member) 13 Intermediate adhesive layer 15 solar cells 16 Busbar wiring 18 Through holes 20 Terminal Box 21_1, 21_2 extension 22_1, 22_2 hole 23 Sealing member 25 Fixing member 27 Lid 28 Sealing member 31 Terminal block 32_1, 32_2 electrode terminal 33 Bypass diode 34_1, 34_2 output cables 35 Crimping member 36 screws 37 Handa 38 clips 40 Mounting base 41 Adhesive member 43 Hole 45 screw holes 50 Terminal Box 51_1, 51_2 protrusion 52 Hole 53 Sealing member 55 Fixing member 57 Lid

Claims

1. A power generation module having solar cells, The power generation module comprises a terminal box provided on the end face surrounding it, The positive-side first busbar wiring, which is taken out from the end face of the power generation module, is detachably connected to the positive-side first electrode terminal of the terminal box. The negative-side second busbar wiring, which is taken out from the end face of the power generation module, is detachably connected to the negative-side second electrode terminal of the terminal box. The terminal box is detachably attached to the end face of the power generation module. Solar cell module.

2. The aforementioned terminal box is On the first main surface side of the power generation module, a first extension extends toward the center of the power generation module, The power generation module comprises a second extension that extends toward the center of the power generation module on the second main surface side opposite to the first main surface of the power generation module, The first and second extensions of the terminal box are each provided with holes. The power generation module is provided with through holes at positions corresponding to the holes provided in the first and second extensions. The terminal box is attached to the power generation module by providing fixing members in the holes provided in the first and second extensions of the terminal box and in the through holes provided in the power generation module. The solar cell module according to claim 1.

3. The solar cell module according to claim 2, wherein the holes provided in the first and second extensions are elongated holes extending toward the center of the power generation module.

4. The solar cell module according to claim 2, wherein a sealing member is provided between the terminal box facing the power generation module and the end face of the power generation module.

5. The aforementioned fixing member is a screw, The solar cell module according to claim 2, wherein the terminal box is attached to the power generation module by providing screws in the holes provided in the first and second extensions of the terminal box and in the through holes provided in the power generation module.

6. The power generation module further comprises a mounting base fixed to the end face, The central part of the mounting base is provided with a hole through which the first and second busbar wiring, which are taken out from the end face of the power generation module, can pass. The terminal box is attached to the power generation module via the mounting base. The solar cell module according to claim 1.

7. The mounting base is fixed to the end face of the power generation module using an adhesive member. The terminal box is fixed to the mounting base using a fixing member. The solar cell module according to claim 6.

8. The aforementioned fixing member is a screw, The terminal box is provided with first and second protrusions that protrude from both sides in the longitudinal direction of the terminal box, The terminal box is fixed to the mounting base by inserting the screws into the holes provided in the first and second protrusions. The solar cell module according to claim 7.

9. The solar cell module according to claim 6, wherein a sealing member is provided between the terminal box on the power generation module side and the mounting base.

10. The aforementioned power generation module is First light-transmitting member and A second light-transmitting member is positioned opposite the first light-transmitting member, An intermediate adhesive layer disposed between the first light-transmitting member and the second light-transmitting member, The solar cell is disposed between the first light-transmitting member and the second light-transmitting member, A solar cell module according to any one of claims 1 to 9.

11. The solar cell module according to any one of claims 1 to 9, wherein the first and second busbar wirings are fixed to the first and second electrode terminals using crimping members.

12. The solar cell module according to any one of claims 1 to 9, wherein the first and second busbar wirings are secured to the first and second electrode terminals using clips.

13. The solar cell module according to any one of claims 1 to 9, wherein the first and second busbar wirings are fixed to the first and second electrode terminals using screws.

14. The solar cell module according to any one of claims 1 to 9, wherein the first and second busbar wirings are fixed to the first and second electrode terminals using solder.

15. The solar cell module according to claim 4 or 9, wherein the sealing member is at least one selected from the group consisting of butyl, silicon resin, urethane resin, fluororesin, and epoxy resin.

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