JP2014229785A - Solar cell panel and connection method thereof, and photovoltaic power generation system - Google Patents

Abstract

The present invention provides a solar cell panel capable of electrical connection excellent in simplification of wiring work and excellent aesthetics during installation. A solar cell panel in which a frame-shaped support frame is disposed on an outer peripheral edge of a solar cell module including a plus electrode, a power generation layer, and a minus electrode, and electrically connected to the plus electrode of the solar cell module A positive terminal connected to the negative terminal of the solar cell module, a negative terminal electrically connected to the negative electrode of the solar cell module, and electrically in the solar cell panel electrically independent from the positive terminal and the negative terminal. Two or more connected relay terminals are provided on the light incident side surface of the support frame as an electrical connection means to the outside. [Selection] Figure 4

Description

  The present invention relates to a solar battery panel, a connection method thereof, and a solar power generation system.

  Solar cells are widely used as clean and non-depleting energy sources, and a variety of research and development on solar cells are being conducted. In addition, development of solar cell modules suitable for installation on the ground and on the roof (hereinafter sometimes referred to as modules) has been actively conducted.

  In general, when a solar cell module is installed and used on a roof as a power source for general households, for example, the output terminal is formed on the back surface of the module. Become. For this reason, the wiring work and installation work of the module become complicated, and the number of work steps increases. In addition, the module must be removed each time maintenance and inspection of the cable and terminal section are performed, and maintenance and management are required. Troublesome work has also occurred. That is, in the conventional module, since the output terminal of the module is provided on the back surface, installation in a place where the back surface of the module is not opened, such as on the roof of a house, is extremely complicated in installation work and maintenance management. It had the disadvantage of being forced to work.

  In order to solve the above problems, for example, according to Patent Document 1, a plurality of output extraction means are provided on a frame constituting a module, and an optimal output terminal is selected after the module is installed, and adjacent to the module. A method of connecting modules by connectors has been proposed. According to this method, since a plurality of output extraction means are provided on the frame, even when a plurality of modules are arranged in an array, adjacent output extraction means provided on the frame are connected to each other from the light receiving surface side. It becomes possible to connect easily. Further, the connector is provided with a parallel connection and a series connection, and by selecting these, the connection of the modules can be freely selected between the parallel connection and the series connection.

JP-A-6-77514 JP-A-9-148609 JP 2004-214475 A

  On the other hand, in recent years, the aesthetics after installation of a module are also regarded as important, and the exposure of wiring after installation of the module tends to be avoided. However, when a plurality of modules are installed in an array by the method of Patent Document 1, the plus output and minus output of the entire array module are output from different modules. These outputs must be paired and input to the power conditioner. That is, in a module arranged in an array, when a positive output and a negative output are output from different modules, it is necessary to route either output to another terminal by wiring.

  Taking FIG. 5 of Patent Document 1 as an example, the plus output of the module 13 and the minus output of the module 14 need to be input to the power conditioner in a paired state. That is, it is necessary to route either or both of the output wirings.

  Further, in Patent Document 2, at least one set in which the outer peripheral side of the solar cell module is supported by a frame-like support and connected to the terminals of the adjacent solar cell panel on the four sides of the light incident surface of the support is provided. A solar cell panel provided with a positive terminal and a negative terminal is described. However, also in Patent Document 2, in order to input the plus output and minus output of the entire modules arranged in an array to the power conditioner in a paired state, it is necessary to route either or both of the output wirings.

  Moreover, in the wiring system of the solar cell module described in Patent Document 3, the output terminal box 3 and the relay connection box 10 are connected to each solar cell module, and the relay connection boxes are cascaded by the multi-core cable 11. To do. And for every relay connection box, the internal connection is given between the relay terminals 13-16 provided in the inside, the solar cell module, and each core wire 11a-11c of a cable. In Patent Document 3, it is not necessary to route either or both output wires in order to input the plus output and minus output of the entire module arranged in an array to the power conditioner in a paired state. Since it is necessary to install a relay box in the module, it is necessary to wire the relay box.

  And when installing a module in a wide area so that beauty may not be spoiled, it is necessary to carry out electrical wiring without exposing these wirings, and wiring work becomes complicated. In addition, when installing a plurality of modules in an array on the wall of a building, the wiring work becomes a wiring work at a high place, which is particularly dangerous.

  Furthermore, when installing a module in a wide-area arcade made of a glass roof, there may be a demand to arrange a plurality of modules in a zigzag pattern for lighting. In this case, the wiring work becomes more complicated.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a solar cell panel capable of electrical connection excellent in simplification of wiring work during installation and excellent aesthetics, a connection method thereof, and a solar power generation system. And

  In order to solve the above-described problems and achieve the object, a solar cell panel according to the present invention has a frame-shaped support frame disposed on the outer peripheral edge of a solar cell module including a positive electrode, a power generation layer, and a negative electrode. A positive terminal electrically connected to the positive electrode of the solar cell module, a negative terminal electrically connected to the negative electrode of the solar cell module, the positive terminal and the solar cell panel Two or more relay terminals electrically connected to each other in the solar cell panel independently of the negative terminal are provided on the light incident side surface of the support frame as an electrical connection means to the outside. It is characterized by this.

  According to the present invention, there is an effect that a solar cell panel capable of electrical connection excellent in simplification of wiring work at the time of installation and excellent aesthetics is obtained.

FIG. 1 is a top view showing a schematic configuration of the solar cell panel according to Embodiment 1 of the present invention, as viewed from the light receiving surface side (sunlight incident side). FIG. 2 is an enlarged view of the peripheral portion of the connector terminal on the light receiving surface side of the solar cell panel according to Embodiment 1 of the present invention. FIG. 3 is a principal part sectional view showing a schematic configuration of the solar cell panel according to the first embodiment of the present invention, and is a principal part sectional view taken along line A-A ′ in FIG. 2. FIG. 4 is a wiring diagram showing a wiring structure in the solar cell panel according to Embodiment 1 of the present invention. FIG. 5 is a diagram showing a state in which three solar cell panels according to the first embodiment of the present invention are arranged. 6 is a diagram showing electrical connection of the solar cell panel according to Embodiment 1, and is a diagram showing electrical connection of the solar cell panel group shown in FIG. FIG. 7 is a diagram showing electrical connection of the solar cell panel according to Embodiment 1 of the present invention. FIG. 8 is a top view showing a schematic configuration of the solar cell panel according to Embodiment 2 of the present invention, as seen from the light receiving surface side (sunlight incident side). FIG. 9 is an enlarged view of the peripheral portion of the connector terminal on the light receiving surface side of the solar cell panel according to Embodiment 2 of the present invention. FIG. 10 is a wiring diagram illustrating a wiring structure in the solar cell panel according to the second embodiment of the present invention. FIG. 11: is a figure which shows the electrical connection of the solar cell panel concerning Embodiment 2 of this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments of a solar cell panel, a connection method thereof, and a solar power generation system according to the present invention will be described below in detail based on the drawings. In addition, this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably. In the drawings shown below, the scale of each member may be different from the actual scale for easy understanding. The same applies between the drawings. Further, even a plan view may be hatched to make the drawing easy to see.

Embodiment 1 FIG.
FIG. 1 is a top view illustrating a schematic configuration of the solar cell panel 1 according to the first embodiment of the present invention, as viewed from the light receiving surface side (sunlight incident side). FIG. 2 is an enlarged view of the peripheral portion of the connector terminal on the light receiving surface side of the solar cell panel 1 according to the first embodiment of the present invention. FIG. 3 is a main part sectional view showing a schematic configuration of the solar cell panel 1 according to the first embodiment of the present invention, and is a main part sectional view taken along line AA ′ in FIG. 2.

  In the solar cell panel 1 according to the first exemplary embodiment, a frame-shaped support frame 3 is disposed on the outer peripheral edge of a solar cell module having a rectangular shape in the main surface direction. The solar cell module is disposed on the light-receiving surface side (light incident side), the translucent substrate 2 that is an insulating light-receiving surface side protection member, and on the back surface side (opposite the light incident side) of the solar cell module. A solar cell element 4 that is a power generation layer is sandwiched between the back surface protection plate 5 that is the back surface side protection member that is formed. The translucent substrate 2 and the back surface protection plate 5 are bonded to each other in the vicinity of the outer peripheral portion in the surface direction with an adhesive (not shown) to protect the solar cell element 4. In addition, the gap between the translucent substrate 2 and the back surface protection plate 5 is filled with a filler (not shown) in order to prevent intrusion of moisture and the like.

  The translucent substrate 2 protects the solar cell element 4 sealed with the filler. Moreover, in this solar cell module, the translucent board | substrate 2 is made into a light-receiving surface, and sunlight injects into the surface of the translucent board | substrate 2. FIG. The translucent substrate 2 has a function of transmitting the sunlight incident on the surface and transmitting it to the solar cell element 4. The back surface protection plate 5 protects the solar cell element 4 sealed with the filler. The back surface protection plate 5 is fixed to the outer surface of the filler.

  The solar cell element 4 is formed on the back surface side (the side opposite to the light incident side) of the translucent substrate 2. The solar cell element 4 includes, for example, a transparent electrode layer, a photoelectric conversion layer, and a back electrode layer on a translucent substrate 2 like a thin film silicon solar cell having a configuration disclosed in Japanese Patent Laid-Open No. 5-95126. It is configured by stacking in order.

  The support frame 3 has a U-shaped cross-sectional shape in a plane perpendicular to the longitudinal direction, and sandwiches the entire outer periphery of the solar cell module from the translucent substrate 2 side and the back surface protection plate 5 side. It is arranged to cover. The support frame 3 is made of a metal material such as aluminum, and protects the outer peripheral edge of the solar cell module. The support frame 3 is composed of, for example, four members, and is provided on a pair of support frames 3a and 3b provided on a pair of opposing sides of the solar cell module and another pair of sides of the solar cell module facing each other. Another pair of support frames 3c and 3d is provided.

  At both ends in the longitudinal direction of the pair of support frames 3a and 3b, a light receiving surface side is provided as an electrical connection means between the solar cell module and the outside, that is, a connection means for taking out the electric power generated in the solar cell element 4. A connector connection terminal group 100 is provided on the surface of the connector. Therefore, the connector connection terminal group 100 is arranged at four locations near the corner on the light receiving surface side of the solar cell panel 1. The connector connection terminal group 100 includes a positive input / output terminal 100a, a negative input / output terminal 100b, and a first relay terminal 100c.

  The plus input / output terminal 100 a is connected to the plus output side electrode (plus electrode) of the solar cell element 4. The negative input / output terminal 100 b is connected to the negative output side electrode (negative electrode) of the solar cell element 4. A plurality of positive input / output terminals 100 a installed near the corner on the light receiving surface side of the solar cell panel 1 are connected to the positive electrode of the solar cell element 4 in parallel. Similarly, a plurality of negative input / output terminals 100 b installed near the corner on the light receiving surface side of the solar cell panel 1 are connected to the negative electrode of the solar cell element 4 in parallel.

  The first relay terminal 100c is electrically independent from the plus input / output terminal 100a and the minus input / output terminal 100b, and at least one is provided in the connector connection terminal group 100. A plurality of first relay terminals 100 c installed near the corner on the light receiving surface side of the solar cell panel 1 are electrically connected to each other in the solar cell panel 1. It plays the function of transmitting the output of one adjacent solar cell panel 1 to the other adjacent solar cell panel 1.

  As shown in FIG. 3, the plus input / output terminal 100 a is configured by a connector insertion metal 101. The connector insertion metal 101 has a structure in which the connector inserted into the connector insertion metal 101 is electrically connected well and is also electrically connected to wiring connected to the lower part thereof. ing. That is, the connector insertion metal 101 has a concave portion into which the connector is inserted on the light receiving surface side of the plus input / output terminal 100a, and a convex portion to which wiring or the like is connected on the inner side (opposite side of the light receiving surface). The plus input / output terminal 100a and the support frame 3a are insulated by an insulator 104.

  The negative input / output terminal 100b and the first relay terminal 100c have the same structure as the positive input / output terminal 100a.

  The connector insertion metal 101 is connected to the positive output side electrode (plus electrode) of the solar cell element 4 by the lead wire 6. That is, in the lead wire 6, one end side is connected to the connector insertion metal 101, and the other end side is connected to a positive output side electrode (plus electrode) of the solar cell element 4. Lead wire 6 is connected to a positive output side electrode (plus electrode) drawn to the surface of solar cell element 4 opposite to translucent substrate 2 using a known technique. Thereby, the electric power generated by the solar cell element 4 can be output to the outside via the lead wire 6 and the connector insertion metal 101.

  Similarly, in the negative input / output terminal 100b, the connector insertion metal 101 is connected to the negative output side electrode (negative electrode) of the solar cell element 4 by the lead wire 6 (not shown). That is, in the lead wire 6, one end side is connected to the connector insertion metal 101 constituting the minus input / output terminal 100 b, and the other end side is connected to the minus output side electrode (minus electrode) of the solar cell element 4. . Thereby, the electric power generated by the solar cell element 4 can be output to the outside via the lead wire 6 and the connector insertion metal 101.

  Further, a positive input / output wiring 102a is electrically connected to the connector plug-in metal 101 (plus input / output terminal 100a). The plus input / output wiring 102 a is housed inside the support frame 3. The positive input / output wiring 102a and the connector plug-in metal 101 (plus input / output terminal 100a) are electrically connected to each other through the electrical connection portion 103a. The electrical connection portion 103a is electrically connected to the positive input / output wiring 102a on the outer peripheral surface of the positive input / output wiring 102a, for example, and the protruding portion comes into contact with the connector insertion metal 101 to connect to the connector insertion metal 101. Connect electrically.

  Similarly, in the support frame 3, a negative input / output wiring 102b that is electrically connected to the negative input / output terminal 100b is accommodated. The negative input / output wiring 102b is electrically connected to the connector insertion metal constituting the negative input / output terminal 100b with the same configuration as described above. Similarly, in the support frame 3, a relay wiring 102c that is electrically connected to the first relay terminal 100c is stored. The relay wiring 102c is electrically connected to the connector insertion metal constituting the first relay terminal 100c with the same configuration as described above.

  Next, a wiring structure in the solar cell panel 1 will be described. FIG. 4 is a wiring diagram illustrating a wiring structure in the solar cell panel 1 according to the first embodiment. In FIG. 4, the solar cell element 4 is indicated by a battery symbol (solar cell) 10 that generally indicates a solar cell in an electric circuit. The solid lines connected to the positive input / output terminals 100a, the negative input / output terminals 100b, and the first relay terminals 100c of the connector connection terminal group 100 indicate wiring, and the black dots at the intersecting portions indicate electrical connections. The portion where no black dot is present indicates that it is electrically insulated.

  The positive output of the solar cell 10 is electrically connected to all the positive input / output terminals 100 a in the solar cell panel 1. The negative output of the solar cell 10 is electrically connected to all the negative input / output terminals 100b in the solar cell panel 1. Furthermore, regarding the first relay terminal 100c, all of the four first relay terminals 100c in the solar cell panel 1 are electrically connected to each other. However, the first relay terminal 100c is not electrically connected to other terminals, that is, the positive input / output terminal 100a and the negative input / output terminal 100b.

  FIG. 5 is a diagram illustrating a state in which three solar cell panels 1 according to the first embodiment are arranged. FIG. 5 shows a state in which the solar cell panel 1-1, the solar cell panel 1-2, and the solar cell panel 1-3 are arranged by being electrically connected by the connector 111 (connector 111a, connector 111b) from the right side. Yes. The solar cell panel 1-1 and the solar cell panel 1-2 are electrically connected by a connector 111a for electrically connecting adjacent solar cell panels 1. That is, in FIG. 5, one end side of the connector 111a is electrically connected to the connector connection terminal group 100 located on the lower left side of the solar cell panel 1-1, and the other end side of the connector 111a is on the lower right side of the solar cell panel 1-2. The solar cell panel 1-1 and the solar cell panel 1-2 are electrically connected by being electrically connected to the connector connector terminal group 100 that is positioned.

  In the connector 111, a metal plug for electrical connection is provided on the surface that becomes the support frame 3 side when arranged on the solar cell panel 1, and the surface side (support frame 3 side) when arranged on the solar cell panel 1. The surface which is the opposite side) is, for example, a flat surface, and members such as wiring are not exposed. The metal plug is provided corresponding to each terminal in the connector connection terminal group 100 described above.

  That is, on one end side of the connector 111, three metal plugs for connecting the positive input / output terminal 100a, connecting the negative input / output terminal 100b, and connecting the first relay terminal 100c are provided. Similarly, three metal plugs for connecting the positive input / output terminal 100a, connecting the negative input / output terminal 100b, and connecting the first relay terminal 100c are provided on the other end side of the connector 111a. The metal plug on one end side of the connector 111 and the metal plug on one end side of the connector 111 can be electrically connected by switching the wiring or the like, and can be electrically connected in the connector 111 in any combination. It is said that.

  Therefore, as a combination of electrical connection between the metal plug at one end and the metal plug at the other end in the connector 111, (1) a metal plug for connecting the positive input / output terminal 100a at one end of the connector 111, and the connector 111 (2) A metal plug for connecting the negative input / output terminal 100b on one end side of the connector 111 and a negative input / output on the other end side of the connector 111. A combination with a metal plug for connecting the terminal 100b, (3) a metal plug for connecting the first relay terminal 100c on one end of the connector 111, and a metal plug for connecting the first relay terminal 100c on the other end of the connector 111 (4) The metal plug for connecting the positive input / output terminal 100a on one end side of the connector 111 and the connector 11 (5) A metal plug for connecting the positive input / output terminal 100a on one end side of the connector 111 and a first relay on the other end side of the connector 111. A combination of a metal plug for connecting the terminal 100c, (6) a metal plug for connecting the negative input / output terminal 100b on one end of the connector 111, and a metal plug for connecting the first relay terminal 100c on the other end of the connector 111. Any combination of these can be selected.

  Then, by inserting a metal plug of the connector 111 into the connector insertion metal 101 of each terminal in the connector connection terminal group 100 described above, electrical connection between each terminal and the connector 111 is performed. Moreover, in the connector 111, the electrical connection state between the metal plugs may be fixed in advance for each combination described above, and the electrical connection state between the metal plugs can be changed in any combination by switching the wiring or the like. May be.

  Similarly, the solar cell panel 1-2 and the solar cell panel 1-3 are electrically connected by a connector 111b for electrically connecting adjacent solar cell panels 1. That is, in FIG. 5, one end side of the connector 111b is electrically connected to the connector connection terminal group 100 located at the lower left side of the solar cell panel 1-2, and the other end side of the connector 111b is at the lower right side of the solar cell panel 1-3. The solar cell panel 1-2 and the solar cell panel 1-3 are electrically connected by being electrically connected to the connector connection terminal group 100 located.

  In FIG. 5, the output connector 112 is electrically connected to the connector connection terminal group 100 located at the lower right of the solar cell panel 1-1. The output connector 112 is connected to the connector connection terminal group 100 of the solar battery panel 1-1 and outputs all the generated power of the electrically connected solar battery panels 1-1, 1-2, and 1-3. It has a function to do.

  In the connector 112, a metal plug for electrical connection is provided on the surface that becomes the support frame 3 side when arranged on the solar cell panel 1, and the surface side (support frame 3 side) when arranged on the solar cell panel 1. For example, the surface on the opposite side is a flat surface. The metal plug is provided corresponding to each terminal in the connector connection terminal group 100 described above.

  And it electrically connects to the metal plug for positive input / output terminal 100a connection in the connector connection terminal group 100, and outputs all the generated electric power (positive output) of the solar cell panels 1-1, 1-2, 1-3. A panel group plus output terminal 113 a to be drawn out to the outside of the solar cell panel 1 in the surface direction of the solar cell panel 1. Similarly, all the generated power (minus output) of the solar cell panels 1-1, 1-2, and 1-3 is electrically connected to the metal plug for connecting the first relay terminal 100c in the connector connection terminal group 100. An output panel group minus output terminal 113 b is drawn to the outside of the solar cell panel 1 in the surface direction of the solar cell panel 1.

  As shown in FIG. 5, in the state where three solar cell panels 1 according to the first embodiment are arranged and electrically connected by the connector 111, the surface side of the connector 111 (the side opposite to the support frame 3 side) and The resulting surface is, for example, a flat surface, and members such as wiring are not exposed. Thereby, the connection of the solar cell panel 1 excellent in aesthetics is realized.

  In order to connect such solar cell panels 1, a plurality of solar cell modules are prepared by a known method, and the support frame 3 described above is arranged on the translucent substrate 2 side around the entire outer peripheral edge of the solar cell module. And it arrange | positions so that it may be inserted | pinched and covered from the back surface protection board 5 side. Then, the connector 111 itself in which the electrical connection between the metal plugs in the connector 111 or the electrical connection between the metal plugs is fixed to the desired electrical connection in advance so that a desired electrical connection can be made between adjacent solar cell modules. Select and place the connector 111 between adjacent solar cell modules.

  FIG. 6 is a diagram illustrating electrical connection of the solar cell panel 1 according to the first embodiment, and is a diagram illustrating electrical connection of the solar cell panel group illustrated in FIG. 5. In FIG. 6, the case where the solar cell panel 1-1, the solar cell panel 1-2, and the solar cell panel 1-3 are electrically connected in series is shown. In FIG. 6, the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts as those in FIGS. A dotted line connected to the solar cell 10 indicates an electrical connection state between the solar cells 10. Moreover, the middle thick line which connects between each terminal has shown the electrical connection between each terminal by a connector.

  In the connector 111b, the first relay terminal 100c of the connector connection terminal group 100 located at the lower left of the solar cell panel 1-2 and the minus connection of the connector connection terminal group 100 located at the lower right of the solar cell panel 1-3. Metal plugs are respectively inserted into the output terminals 100b, and these two metal plugs are electrically connected. Thus, the first relay terminal 100c and the negative input / output terminal 100b are electrically connected.

  Moreover, in the connector 111b, the negative input / output terminal 100b of the connector connection terminal group 100 located in the lower left of the solar cell panel 1-2 and the connector connection terminal group 100 located in the lower right of the solar cell panel 1-3. Metal plugs are respectively inserted into the plus input / output terminals 100a, and these two metal plugs are electrically connected. Thus, the minus input / output terminal 100b and the plus input / output terminal 100a are electrically connected.

  In the connector 111a, the 1st relay terminal 100c of the connector connection terminal group 100 located in the lower left of the solar cell panel 1-1 and the 1st of the connector connection terminal group 100 located in the lower right of the solar cell panel 1-2. Metal plugs are respectively inserted into the relay terminals 100c, and these two metal plugs are electrically connected. Thereby, these two 1st relay terminals 100c are electrically connected.

  Moreover, in the connector 111a, the negative input / output terminal 100b of the connector connection terminal group 100 located in the lower left of the solar cell panel 1-1 and the connector connection terminal group 100 located in the lower right of the solar cell panel 1-2. Metal plugs are respectively inserted into the plus input / output terminals 100a, and these two metal plugs are electrically connected. Thus, the minus input / output terminal 100b and the plus input / output terminal 100a are electrically connected.

  And the minus output of the minus input / output terminal 100b of the connector connection terminal group 100 located in the lower right of the solar cell panel 1-3 is the connector 111b and the connector connection terminal group 100 located in the lower left of the solar cell panel 1-2. The first relay terminal 100c, the relay wiring 102c in the support frame 3a of the solar cell panel 1-2, the first relay terminal 100c of the connector connection terminal group 100 located at the lower right of the solar cell panel 1-2, the connector 111a, the sun The first relay terminal 100c of the connector connection terminal group 100 located at the lower left of the battery panel 1-1, the relay wiring 102c in the support frame 3a of the solar battery panel 1-1, and the lower right of the solar battery panel 1-1. Externally via the first relay terminal 100c of the connector connection terminal group 100, the connector 112, and the panel group minus output terminal 113b. It is output to.

  Further, in the output connector 112, the panel group plus output terminal 113 a is connected to the plus input / output terminal 100 a of the connector connection terminal group 100 located at the lower right of the solar battery panel 1-1, and the first connector connection terminal group 100. The panel group minus output terminal 113b is electrically connected to the relay terminal 100c.

  Thus, each solar cell panel is electrically connected by electrically connecting the solar cell panel 1-1, the solar cell panel 1-2, and the solar cell panel 1-3 through the support frame 3a and the connectors 111a and 111b. Thus, they can be connected in series and output from the same solar cell panel in pairs without extending the wiring between the plus side and the mass side of the output of the solar cell panel group. Thereby, the wiring for connection of a solar cell panel can be performed simply, without exposing the wiring for the output of a solar cell panel group. Moreover, if a connection terminal (electrical connection form) is changed with the connector 111, the electrical connection system (parallel, series) between the solar cell panels 1 can be changed easily.

  In the example of the electrical series connection of the solar cell panels shown in FIG. 6, it is not always necessary to provide the connector connection terminal group 100 at four locations in the solar cell panel 1. In order to realize the electrical connection shown in FIG. 6, in the solar cell panel 1-1 and the solar cell panel 1-2, at least one positive input / output terminal 100a, at least one negative input / output terminal 100b, It suffices to include at least two first relay terminals 100c, and the solar battery panel 1-3 includes at least one plus / minus input / output terminal 100a and at least one minus / minus input / output terminal 100b. What is necessary is just to adjust to an appropriate position. It is needless to say that the solar cell panel 1-3 may include the first relay terminal 100c similarly to the solar cell panel 1-1 and the solar cell panel 1-2.

  Next, an example in which parallel connection and series connection are mixed in an electrical connection system of a large number of solar cell panels 1 will be described. FIG. 7 is a diagram illustrating electrical connection of the solar cell panel 1 according to the first embodiment. FIG. 7 shows a case where 15 solar cell panels 1 are electrically connected in series. In FIG. 7, the same reference numerals as those in FIGS. 1 to 5 denote the same or equivalent parts as in FIGS. That is, the solar cell panel 1-1-1 to the solar cell panel 1-3-5 are equivalent to the solar cell panel 1, and are arranged in 3 rows and 5 columns. A dotted line connected to the solar cell 10 indicates an electrical connection state between the solar cells 10. Further, in FIG. 7, the illustration of the connector 111 is omitted only partially because of the illustration. However, the connection between the terminals of the adjacent solar cell panels is made by the connector 111.

  In this example, five parallel connection groups in which three solar battery panels are electrically connected in parallel are provided. That is, (1) the first parallel connection group in which the solar cell panel 1-1-1, the solar cell panel 1-1-2, and the solar cell panel 1-1-3 are electrically connected in parallel; (2) the sun A second parallel connection group in which the battery panel 1-1-4, the solar battery panel 1-1-5, and the solar battery panel 1-2-5 are electrically connected in parallel; and (3) the solar battery panel 1-2. 2, solar cell panel 1-2-3 and solar cell panel 1-2-4 are electrically connected in parallel, a third parallel connection group, (4) solar cell panel 1-2-1 and solar cell panel 1 -3-1 and the solar cell panel 1-3-2 are electrically connected in parallel, a fourth parallel connection group, (5) solar cell panel 1-3-3, solar cell panel 1-3-4 and the sun A fifth parallel connection group in which the battery panel 1-3-5 is electrically connected in parallel is provided. To have. These five parallel connection groups are electrically connected in series in the above order.

  Electrical series connection between the first parallel connection group and the second parallel connection group is performed by electrical series connection between the solar cell panel 1-1-3 and the solar cell panel 1-1-4. The electrical series connection between the second parallel connection group and the third parallel connection group is performed by electrical series connection between the solar cell panel 1-2-5 and the solar cell panel 1-2-4. The electrical series connection between the third parallel connection group and the fourth parallel connection group is performed by electrical series connection between the solar cell panel 1-2-2 and the solar cell panel 1-2-1. The electrical series connection between the fourth parallel connection group and the fifth parallel connection group is performed by electrical series connection between the solar cell panel 1-3-2 and the solar cell panel 1-3-3. The electrical parallel connection of the three solar cell panels in each parallel connection group and the electrical series connection of the solar cell panels between the adjacent parallel connection groups are performed using the connector 111.

  Further, the negative output of all the solar battery panels output from the negative input / output terminal 100b of the solar battery panel 1-3-5 is supplied to the solar battery panel 1-1-1 via the connector 111 and another solar battery panel 1. Are connected to the first relay terminal 100c and output to the outside via the panel group minus output terminal 113b. That is, the negative output of all the solar battery panels output from the negative input / output terminal 100b of the solar battery panel 1-3-5 is the first relay of the negative input / output terminal 100b, 1-2-5 of 1-3-5. Terminal 100c (1-3-5 side), 1-2-5 first relay terminal 100c (1-1-5 side), 1-1-5 first relay terminal 100c (1-2-5 side) 1-1-5 first relay terminal 100c (1-1-4 side), 1-1-4 first relay terminal 100c (1-1-5 side), 1-1-4 first relay Terminal 100c (1-1-3 side), 1-1-3 first relay terminal 100c (1-1-4 side), 1-1-3 first relay terminal 100c (1-1-2 side) 1-1-2 first relay terminal 100c (1-1-3 side), 1-1-2 first relay terminal 100c (1-1-1 side), 1-1-1 first Relay terminals 100c (1-1-2 side), (connected to the panel group negative output terminal 113b) the first relay terminal 100c of 1-1-1, and output to the outside via the panel group minus output terminal 113b. The electrical connection between the terminals is made by the connector 111 or the relay wiring 102c in the support frame 3 of the solar cell panel.

  Moreover, since the positive input / output terminal 100a of the solar cell panel 1-1-1 serves as a positive output of all the solar cell panels, the wiring between the positive output side and the mass output side of the output of the solar cell panel group is extended and externally provided. The same solar cell panel can be made in a pair without being exposed to each other. Therefore, the electrical parallel connection and the series connection of the solar cell panels can be freely combined only by selecting the electrical connection in the connector 111, and between the solar cell panels can be easily performed without exposing the wiring. Wiring can be performed.

  In addition, as described above, a plurality of solar cell panels 1 are formed, and the adjacent solar cell panels 1 are electrically connected in series or in parallel using the connector 111 as described above, thereby simplifying the wiring work. A solar power generation system with excellent aesthetics can be realized.

  In the first embodiment described above, a plurality of connector connection terminal groups 100 are provided on the light receiving surface side of the support frame 3 of the solar cell panel 1. The connector connection terminal group 100 includes a positive input / output terminal 100a, a negative input / output terminal 100b, and a first relay terminal 100c. The positive input / output terminal 100a is connected to the positive electrode of the solar cell element 4, and the negative input / output terminal 100b is connected to the negative electrode of the solar cell element 4, and the function of outputting the electric power generated by the solar cell element 4 to the outside Responsible for electrical connection with other solar cell panels. The first relay terminal 100c is electrically independent from the positive input / output terminal 100a and the negative input / output terminal 100b, is electrically connected to each other in the solar cell panel 1, and adjoins the output of one adjacent solar cell panel 1. The function of transmitting power to the other solar cell panel 1 is performed.

  When the solar cell panel 1 has such a configuration, adjacent solar cell panels can be easily electrically connected and wired using the connector 111. And it can output from the solar cell panel which is the same or adjacent in a pair, without extending and exposing the wiring of the plus output side of the output of a solar cell panel group, and a mass output side outside. Moreover, since solar cell panels can be electrically connected without exposing wiring, the connection of the solar cell panel excellent in aesthetics is possible.

  Therefore, according to Embodiment 1, a solar cell panel capable of electrical connection excellent in simplification of wiring work during installation and excellent aesthetics can be obtained. And the solar system excellent in aesthetics is obtained by electrically connecting this solar cell panel.

Embodiment 2. FIG.
FIG. 8 is a top view showing a schematic configuration of the solar cell panel 21 according to the second embodiment of the present invention, as viewed from the light receiving surface side (sunlight incident side). FIG. 9 is an enlarged view of the peripheral portion of the connector terminal on the light receiving surface side of the solar cell panel 21 according to the second embodiment of the present invention. 8 and 9, the same reference numerals as those in FIGS. 1 to 5 indicate the same as or equivalent to those in FIGS. 1 to 5.

  In the solar cell panel 21 according to the second embodiment, a frame-shaped support frame 3 is disposed on the outer peripheral edge of a solar cell module having a rectangular shape in the main surface direction. The support frame 3 is composed of, for example, four members, and is provided on a pair of support frames 3a and 3b provided on a pair of opposing sides of the solar cell module and another pair of sides of the solar cell module facing each other. Another pair of support frames 3c and 3d is provided.

  At both ends in the longitudinal direction of the pair of support frames 3a and 3b in the second embodiment, there are light receiving surfaces as electrical connection means to the outside, that is, connection means for taking out the electric power generated in the solar cell element 4. A connector connection terminal group 200 is provided on the surface on the side. Therefore, the connector connection terminal group 200 is disposed at four locations near the corners on the light receiving surface side of the solar cell panel 21. The connector connection terminal group 200 includes a positive input / output terminal 100a, a negative input / output terminal 100b, a first relay terminal 100c, and a second relay terminal 100d. The positive input / output terminal 100a, the negative input / output terminal 100b, and the first relay terminal 100c are the same as or equivalent to those of the first embodiment. The second relay terminal 100d has the same structure and function as the first relay terminal 100c.

  FIG. 10 is a wiring diagram illustrating a wiring structure in the solar cell panel 21 according to the second embodiment. The positive input / output terminal 100a, the negative input / output terminal 100b, and the first relay terminal 100c have the same connection structure as in the first embodiment. Furthermore, regarding the second relay terminal 100d, the four second relay terminals 100d in the solar cell panel 21 are all electrically connected to each other as in the first relay terminal 100c. However, the second relay terminal 100d is not electrically connected to other terminals, that is, the positive input / output terminal 100a, the negative input / output terminal 100b, and the first relay terminal 100c. The second relay terminal 100d is electrically connected to each other in the solar cell panel 2 independently of the other terminals, that is, the positive input / output terminal 100a, the negative input / output terminal 100b, and the first relay terminal 100c. More than one is provided.

  The second relay terminal 100d has the same structure as the positive input / output terminal 100a, like the negative input / output terminal 100b and the first relay terminal 100c. The 2nd relay terminal 100d comprised in this way bears the function which transmits the output of one adjacent solar cell panel 21 to the other adjacent solar cell panel 21 similarly to the 1st relay terminal 100c.

  Next, an example of electrical connection between the solar cell panels 21 when the first relay terminal 100c and the second relay terminal 100d are provided in the solar cell panel 21 as described above will be described. When installing a solar cell panel, the solar cell panel may be arranged in a staggered pattern with an interval between adjacent solar cell panels. For example, when a solar panel is installed on a glass roof and the gap between the solar panel is used for light extraction, or when a solar panel is installed on the wall of a building and the window of the building is located in the gap between the solar panels There are some cases. Moreover, the arrangement of such a solar cell panel is excellent from the viewpoint of design. Even in such a case, there is a demand for simple installation work without exposing the routing wiring for output extraction.

  Therefore, an example in which a plurality of solar battery panels 21 are arranged in a staggered pattern and electrically connected is shown. FIG. 11 is a diagram illustrating electrical connection of the solar cell panel 21 according to the second embodiment. FIG. 11 shows a case where ten solar cell panels 21 are arranged in a staggered pattern and electrically connected in series. 11, the same reference numerals as those in FIGS. 1 to 10 denote the same or equivalent products as those in FIGS. 1 to 10. The solar cell panel 1-1-1 to the solar cell panel 1-4-3 are equivalent to the solar cell panel 21, and are arranged in 4 rows × 2 columns or 3 columns. A dotted line connected to the solar cell 10 indicates an electrical connection state between the solar cells 10. In FIG. 11, the illustration of the connector 111 is omitted as a part because of the illustration. However, the connection between the terminals of the adjacent solar cell panels is made by the connector 111.

  The solar cell panel 21 is electrically connected to the solar cell panel 1-1-1, the solar cell panel 1-2-1, the solar cell panel 1-3-1, the solar cell panel 1-4-1, and the solar cell panel 1. -4-2, solar cell panel 1-3-2, solar cell panel 1-2-2, solar cell panel 1-1-2, solar cell panel 1-2-3, solar cell panel 1-4-3 Connected in order.

  Moreover, the connection terminal of each solar cell panel 21 is the positive input / output terminal 100a (1-2-1 side) of the solar cell panel 1-1-1, and the negative input / output terminal 100b of the solar cell panel 1-2-1 ( 1-1-1 side), positive input / output terminal 100a (1-3-1 side) of the solar cell panel 1-2-1, and negative input / output terminal 100b (1-2) of the solar cell panel 1-3-1. 1 side), the positive input / output terminal 100a (1-4-1 side) of the solar cell panel 1-3-1, the negative input / output terminal 100b (1-3-1 side) of the solar cell panel 1-4-1, Positive input / output terminal 100a (1-3-1 side) of solar cell panel 1-4-1, first relay terminal 100c (1-4-2 side) of solar cell panel 1-3-1, solar cell panel 1 -4-2 negative input / output terminal 100b (1-3-1 side), solar battery pack 1-4-2 plus input / output terminal 100a (1-3-2 side), solar cell panel 1-3-2 minus input / output terminal 100b (1-4-2 side), solar cell panel 1-3 -2 positive input / output terminal 100a (1-2-2 side), 1-2-2 negative input / output terminal 100b (1-3-2 side), positive input / output terminal of solar cell panel 1-2-2 100a (1-1-2 side), minus input / output terminal 100b (1-2-2 side) of the solar cell panel 1-1-2, plus input / output terminal 100a (1- 2-3 side), the negative input / output terminal 100b (1-1-2 side) of the solar cell panel 1-2-3, and the positive input / output terminal 100a (1-3-2 side) of the solar cell panel 1-2-3. ), First relay terminal 100c (1-2-3 side) of solar cell panel 1-3-2, solar power Electrical connection in order of the first relay terminal 100c (1-4-3 side) of the panel 1-3-2 and the negative input / output terminal 100b (1-3-2 side) of the solar cell panel 1-4-3. Has been.

  Further, the positive output of all the solar battery panels output from the positive input / output terminal 100a of the solar battery panel 1-4-3 is supplied to the solar battery panel 1-1-1 via the connector 111 and the other solar battery panel 21. Are connected to the second relay terminal 100d and output to the outside via the panel group plus output terminal 113a. That is, the positive output of all the solar battery panels output from the positive input / output terminal 100a of the solar battery panel 1-4-3 is the positive input / output terminal 100a (1-3-2 side) of the solar battery panel 1-4-3. ), The second relay terminal 100d (on the 1-4-3 side) of the solar cell panel 1-3-2, the second relay terminal 100d (on the 1-2-3 side) of the solar cell panel 1-3-2, and the solar cell. Second relay terminal 100d (on the 1-3-2 side) of panel 1-2-3, second relay terminal 100d (on the 1-1-2 side) of solar cell panel 1-2-3, solar cell panel 1-1 -2 second relay terminal 100d (1-2-3 side), solar cell panel 1-1-2 second relay terminal 100d (1-2-2 side), solar cell panel 1-2-2 2 relay terminal 100d (1-1-2 side), second relay terminal 100d of solar cell panel 1-2-2 1-1-1 side), the second relay terminal 100d of the solar cell panel 1-1-1 (1-2-2 side), the second relay terminal 100d of the solar cell panel 1-1-1 (panel group plus output) Connected to the terminal 113a) and output to the outside via the panel group plus output terminal 113a.

  Further, since the negative input / output terminal 100b of the solar cell panel 1-1-1 serves as a negative output of all the solar cell panels, the wiring between the positive output side and the mass output side of the output of the solar cell panel group is extended and externally provided. Can be paired without being exposed to As described above, by selecting the electrical connection in the connector 111 including the first relay terminal 100c and the first second relay terminal 100d, even when a large number of solar cell panels 21 are arranged in a staggered pattern, wiring is performed. Wiring between solar cell panels can be easily performed without being routed and without exposing the wiring.

  Further, as described above, a plurality of solar cell panels 21 are formed, and adjacent solar cell panels 21 are electrically connected in series or in parallel using the connector 111 as described above, thereby simplifying the wiring work. A solar power generation system with excellent aesthetics can be realized.

  In the second embodiment described above, a plurality of connector connection terminal groups 200 are provided on the light receiving surface side of the support frame 3 of the solar cell panel 21. The connector connection terminal group 200 includes a positive input / output terminal 100a, a negative input / output terminal 100b, a first relay terminal 100c, and a second relay terminal 100d. The positive input / output terminal 100a is connected to the positive electrode of the solar cell element 4, and the negative input / output terminal 100b is connected to the negative electrode of the solar cell element 4, and the function of outputting the electric power generated by the solar cell element 4 to the outside Responsible for electrical connection with other solar cell panels. The first relay terminals 100 c are electrically independent from the other terminals, and are electrically connected to each other in the solar cell panel 21. Similarly, the second relay terminals 100d are electrically independent from the other terminals, and are electrically connected to each other in the solar cell panel 21. The first relay terminal 100c and the second relay terminal 100d are electrically independent from other terminals, respectively, and have a function of transmitting the output of one adjacent solar cell panel 21 to the other adjacent solar cell panel 21.

  When the solar cell panel 21 has such a configuration, the adjacent solar cell panels 21 can be easily electrically connected and wired using the connector 111. And it can output from the solar cell panel 21 which is the same or adjacent in a pair, without extending and exposing the wiring of the positive output side of a solar cell panel group, and a mass output side outside. Moreover, since the solar cell panels 21 can be electrically connected to each other without exposing the wiring, it is possible to connect the solar cell panels 21 with excellent aesthetics.

  Further, according to the second embodiment, even when the solar cell panels 21 are arranged in a staggered pattern, the wiring work can be similarly simplified and wired without being exposed so as not to impair the beauty.

  Therefore, according to the second embodiment, a solar cell panel capable of electrical connection excellent in simplification of wiring work during installation and excellent aesthetics can be obtained. And the solar system excellent in aesthetics is obtained by electrically connecting this solar cell panel.

  In the above-described embodiment, a thin-film solar cell module in which a solar cell element is directly formed on a glass substrate is used as an example. However, the type of the solar cell element is not limited in the present invention.

  Further, in the above-described embodiment, the connector connection terminal group 100 is provided at the four corners of the support frame 3, but the arrangement position and the number of arrangement places of the connector connection terminal group 100 are not limited.

  Further, regarding the relay terminal, although one system is used in the first embodiment and two systems are used in the first embodiment, the number of systems is not limited, and may be more systems.

  Furthermore, in the connection example of the solar cell panel shown in the first embodiment, the solar cell panel 1 having the first relay terminal 100c is used for all the solar cell panels, and the solar cell shown in the second embodiment. In the panel connection example, the solar cell panel 21 having the first relay terminal 100c and the second relay terminal 100d is used for all the solar cell panels, but the relay terminal is provided for a portion that does not require the relay terminal. It is possible to use no solar panel. That is, it is possible to configure a solar power generation system in which a solar cell panel that does not include the above-described relay terminal and a solar cell panel that includes the relay terminal are mixed. By using such a solar power generation system, it is possible to arrange the relay terminals to the minimum necessary and to reduce the cost of the entire system.

  As described above, the solar cell panel according to the present invention is useful for electrical connection excellent in simplification of wiring work and excellent aesthetics during installation.

  DESCRIPTION OF SYMBOLS 1 Solar cell panel, 2 Translucent board | substrate, 3, 3a, 3b, 3c, 3d Support frame, 4 Solar cell element, 5 Back surface protection plate, 6 Lead wire, 10 Solar cell, 21 Solar cell panel, 100 Connector connection terminal Group, 100a positive input / output terminal, 100b negative input / output terminal, 100c first relay terminal, 100d second relay terminal, 101 connector insertion metal, 102a positive input / output wiring, 102b negative input / output wiring, 102c relay wiring, 103a electricity Connection part, 104 insulator, 111, 111a, 111b connector, 112 output connector, 113a panel group plus output terminal, 113b panel group minus output terminal, 200 connector connection terminal group.

Claims (11)

A solar cell panel in which a frame-shaped support frame is arranged on the outer peripheral edge of a solar cell module provided with a positive electrode, a power generation layer, and a negative electrode,
A positive terminal electrically connected to the positive electrode of the solar cell module;
A negative terminal electrically connected to the negative electrode of the solar cell module;
Two or more relay terminals electrically connected to each other within the solar cell panel independently of the plus terminal and the minus terminal;
On the light incident side surface of the support frame as an electrical connection means to the outside,
A solar panel characterized by. A plurality of at least one of the plus terminal and the minus terminal;
The solar cell panel according to claim 1. Comprising a plurality of connection terminal groups having the plus terminal, the minus terminal, and the relay terminal;
The solar cell panel according to claim 1 or 2. The connection terminal group has a plurality of the relay terminals of different electrical systems that are electrically independent,
The solar cell panel according to claim 3. The solar cell panel has a quadrangular shape in the surface direction of the solar cell panel,
The plurality of connection terminal groups are disposed near corners of the solar cell panel,
The solar cell panel according to any one of claims 1 to 4, wherein: A solar cell panel connection method for electrically connecting a plurality of solar cell panels,
A plurality of the solar cell panels according to any one of claims 1 to 5 are arranged adjacent to each other,
A connector for electrical connection between the terminals is disposed on the light incident side surface of the support frame, and one of the terminals in the connector connection terminal group of one solar cell panel among the adjacent solar cell panels. And any one of the terminals in the connector connection terminal group of the other solar cell panel is electrically connected by the connector,
A method for connecting solar cell panels. Three or more solar panels are arranged adjacent to each other,
Of the relay terminals of the solar cell panel disposed between the other two solar cell panels, one of the relay terminals is the connector of one of the solar cell panels in the other two solar cell panels. The relay terminal or the one relay terminal in the connector connection terminal group of the other solar cell panel in the other two solar cell panels is connected to any terminal in the connection terminal group. By connecting to the terminal having the same polarity as the connected terminal, the output of the one solar cell panel can be transmitted to the other solar cell panel,
The method for connecting solar cell panels according to claim 6. Disposing the plus side plus terminal and the minus side minus terminal on the same solar cell panel, which is a terminal for power output of the entire plurality of electrically connected solar cell panels,
The method for connecting solar cell panels according to claim 6 or 7. Arranging the solar cell panels in a staggered manner;
The method for connecting solar cell panels according to any one of claims 6 to 8. A plurality of the solar cell panels according to any one of claims 1 to 5 are arranged,
A connector that performs electrical connection between the terminals is disposed on a light incident side surface of the support frame, and one of the terminals in the connector connection terminal group of one solar cell panel among the adjacent solar cell panels. , Any terminal in the connector connection terminal group of the other solar cell panel is electrically connected by the connector,
A solar power generation system characterized by In the configuration of the solar cell panel, a plurality of solar cell panels mixed with other solar cell panels not provided with the relay terminals are arranged,
The connector is disposed on a light incident side surface of the support frame of the solar cell panel and the other solar cell panel, and one of the adjacent solar cell panel and the other solar cell panel is provided. A terminal and one of the other terminals is electrically connected by the connector;
The solar power generation system according to claim 10.