JP2011071214A - Solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module that enhances filling efficiency of solar cell elements in a solar cell module by reducing a material cutting loss so as to suppress a loss when electrically connecting the solar cell elements. <P>SOLUTION: The solar cell module is formed by combining polygonal solar cell elements with each other. When the polygonal solar cell elements are combined with each other, the solar cell module has each void geometrically constituted by the sides not adjacent to each other. Electrical connection between the polygonal solar cell elements adjacent to each other is formed in each void. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a crystalline silicon solar cell having a heterojunction on a semiconductor substrate surface.

  Solar cells using a semiconductor substrate have high photoelectric conversion efficiency, and are already widely used as solar power generation systems. Usually, a plurality of solar cell elements made of a single semiconductor substrate are combined and connected in series to be used as a solar cell module. As a result, the absolute value of the current value can be reduced and the voltage can be increased. When a solar cell element using a semiconductor substrate is combined and connected in series, a gap generated between the solar cell elements is basically an ineffective portion. Therefore, a technique for making this gap as narrow as possible has been developed. .

  In order to reduce the ineffective portion, the shape of the solar cell module and the solar cell element becomes important. The shape of the solar cell module is rectangular from the viewpoint of handling. On the other hand, the solar cell element has various shapes such as a rectangle and a hexagon. This largely depends on the manufacturing method of the semiconductor substrate. For example, a single crystal silicon substrate can be obtained by chamfering a cylindrical single crystal ingot and slicing it. Basically, the more the number of vertices close to a circle in the cross section of a columnar azugron, the smaller the loss. Conventionally, the shape is changed from a cylinder to a prism by surface projection. However, when a quadrangular prism is cut out from a cylinder, a loss of about 36% is generated if the square is cut out accurately. Usually, it cuts out so that a part of the circumference may be left at the corner of the rectangle so as to reduce the loss. By leaving a part of the circumference at the apex part in this way, the cutting loss when cutting out from the cylindrical single crystal ingot can be reduced, but when creating modules by spreading solar cell elements, a blank part is formed However, the effective area of the module is reduced. The extent to which the circle is finally left in the polygon is determined by the balance between the cutting loss and the loss due to the module blank. Also, by cutting off the sharp corners of the polygon and generating vertices with a larger inner angle, it is possible to suppress the yield due to stress concentration when handling the semiconductor substrate. Sometimes designed.

  In the module, a system is adopted in which basically adjacent solar cell elements are connected in series to increase the voltage and reduce the current value. Therefore, when elements with different areas are used, measures are taken such that a part is connected in parallel and the currents are matched, or elements with the same area are connected in series and taken out as separate wiring. In order to connect solar cell elements of the type with electrodes on both main surfaces in series, a space is required to route the electrical wiring from the incident surface side to the back surface side, and the spacing between the elements spread over the module is at least limited by this space. It will be. In solar cell elements of the type that have electrodes on both main surfaces, it is necessary to connect the elements in parallel or to connect elements with different polarities on the incident side in series because it is not necessary to route the wiring between the incident surface and the back surface. Space can be slightly reduced. However, when adjacent elements are connected by wiring, stress due to linear expansion generated by heating at the time of electrical connection is generated, so that it is necessary to leave some space. The same can be said for the case where the solar cell elements of the type in which the positive and negative electrodes are taken out only on the back surface are connected in series.

  In Patent Document 1, a pentagonal or trapezoidal solar cell element half-divided by a straight line connecting a side facing the regular hexagon or a vertex facing the regular hexagon is combined to be packed most closely. It is a known rule that regular hexagons or regular hexagonal divided shapes can be used to close-pack, but the hypotenuses of the half-divided cells are opposed to each other, and the wiring is routed from the incident surface to the back surface at this opposed portion. Since they are routed around, it is necessary to make the gap between the opposing portions relatively large, which causes a problem that the cell filling rate is reduced accordingly. In addition, if the interconnector is routed from the upper surface to the lower surface in the oblique side portion as described above, the cell tends to be chipped or cracked in the oblique side portion, which may cause a problem that the cell is damaged. Furthermore, when connecting between cells with multiple interconnectors, the bending position is different for each interconnector because the bend is made on the oblique side of the cell, and the interconnector connection work becomes complicated. Problem arises.

  Further, as in Patent Document 2, two trapezoidal elements obtained by dividing a hexagon into four are combined to form a square by combining the respective hypotenuses, and the hypotenuses are connected in parallel. The module effective area is also increased because the yield can be suppressed as compared to 1, and the module interval at the parallel connection portion can be reduced. However, even in the method described in this document, the same element spacing as that in the related art is required in the serial connection portion other than the hypotenuse portion. Further, the number of connection points is increased by dividing the substrate into four parts, and the effective area is reduced.

Japanese Patent No. 3349318 JP 2007-235113 A

  An object of the present invention is to provide a solar cell module including a solar cell element using a semiconductor substrate, to reduce the loss of cutting out from the raw material, to increase the filling efficiency of the solar cell element in the solar cell module, and to electrically connect the solar cell element. To reduce the yield when connecting to the solar cell element, improve the degree of freedom when electrically connecting the solar cell elements, and change the electrical connection between the solar cell elements in the solar cell module according to the situation A possible solar cell module is provided.

  In the present invention, in a solar cell module composed of solar cell elements using a semiconductor substrate, electrical connection between the solar cell elements is formed in a blank portion that is generated when the solar cell elements are spread, and the space portion is electrically connected. It is characterized in that an inter-element connection component for providing a general connection is provided.

  That is, the present invention is a solar cell module in which polygonal solar cell elements are combined, and when the polygonal solar cell elements are combined, the solar cell module has a blank portion configured geometrically by non-adjacent sides. In addition, the present invention relates to a solar cell module in which electrical connection between adjacent polygonal solar cell elements is made in the blank portion.

  A preferred embodiment relates to the solar cell module, wherein the blank portion includes an inter-element connection component.

  In a preferred embodiment, the positive and negative wiring members at least in the vicinity of the blank portion of the polygonal solar cell element do not overlap when viewed from the direction perpendicular to the surface of the polygonal solar cell element, and the inter-element connection component The solar cell module according to claim 1, wherein both the positive electrode side and negative electrode side wiring members of the polygonal solar cell element in contact with the same are electrically connected to the same inter-element connection component.

  In a preferred embodiment, the collector electrode includes a first collector electrode that collects current from a solar cell, and a second collector electrode that collects current from the first collector electrode and is electrically connected to a wiring member. The collector electrode is arranged so as to connect the blank portions facing each other across the vicinity of the center of the element, and the first collector electrode is substantially concentric with the outline of the polygonal element and partially forms a similar shape, The first collector electrode is partially separated from the above solar cell module.

  A preferred embodiment is an octagonal solar cell element in which dodecagons having two types of sides, a short side and a long side, are divided in half, and the lengths of the sides opposed to the polygonal solar cell element are equal. The first solar cell element in which the dodecagon is divided in half by a straight line passing through the midpoint of the long side facing each other, and the dodecagon in the straight line passing through the midpoint of the opposing short side A solar cell module composed of a second solar cell element divided in half, wherein two first solar cell elements are combined to form the dodecagonal shape, and the second solar cell element is divided into two The second element set having the dodecagonal shape is formed by combining them, the first element set and the second element set are arranged adjacent to each other in the vertical and horizontal directions, and the first element set is disposed in each of the missing portions on the left and right sides. Place solar cell elements in the missing parts above and below A solar cell module in which the second solar cell element is arranged and the peripheral portions of the upper, lower, left and right configured by arranging the elements are linear, and are adjacent in the first element set and the second element set. The solar cell module is characterized in that all of the first and second solar cell elements are adjacent to other solar cell elements through two or more blank portions, except in the case of the above.

  In a preferred embodiment, the polygonal solar cell element is a solar cell element obtained by dividing a pseudo regular hexagon having a curvature at the apex portion in half, and the pseudo regular hexagon is formed by straight lines passing through midpoints of opposing sides. A solar cell module comprising a pseudo pentagonal solar cell element divided in half and a pseudo trapezoidal solar cell element in which the pseudo regular hexagon is divided in half along a straight line passing through the center of the opposing pseudo vertex part, A side splitting element set formed by combining two pentagonal solar cell elements into the pseudo hexagonal shape and a vertex splitting element set formed by combining two pseudo trapezoidal solar cell elements into the pseudo hexagonal shape to form the side The split element set and the vertex split element set are arranged adjacent to each other in the vertical and horizontal directions, and the pseudo pentagonal solar cell elements are arranged in the missing portions on the left and right, respectively, Each of the pseudo-trapezoidal solar cell elements is arranged in each part, and the solar cell module in which the upper, lower, left, and right peripheral parts are arranged in a straight line, the side dividing element group and the vertex dividing element group The present invention relates to the solar cell module, wherein all the solar cell elements are adjacent to other solar cell elements through two or more blank portions, except when adjacent to each other.

  A preferred embodiment is a solar cell module comprising a hexagonal solar cell element divided into four by a straight line passing through the midpoint of the long side facing the dodecagon and a straight line passing through the midpoint of the opposing short side. The third element set having the dodecagonal shape by combining four hexagonal solar cell elements is arranged adjacent to the top, bottom, left and right, and the hexagonal solar cell elements are respectively arranged in the lacking portions present in the peripheral portion. And a solar cell module in which the upper, lower, left, and right peripheral parts constituted by arranging the elements are linear, wherein the angle of the dividing line of at least one third element set is a linear peripheral edge of the solar cell module It is related with the said solar cell module characterized by being inclined about 30 degrees or about 60 degrees with respect to the part.

  A preferred embodiment is a solar cell module comprising a pseudo trapezoidal solar cell element divided into four by a straight line passing through the midpoint of the side facing the pseudo hexagon and a straight line passing through the center of the opposing pseudo vertex, A fourth element set in which the pseudo hexagonal solar cell elements are combined to form the pseudo hexagonal shape is arranged adjacent to the top, bottom, left and right, and the pseudo trapezoidal solar cell elements are respectively arranged in the lacking portions present in the peripheral portion. And a solar cell module in which the upper, lower, left and right peripheral parts constituted by arranging the elements are linear, wherein the angle of the dividing line of at least one fourth element set is the linear peripheral edge of the solar cell module It is related with the said solar cell module characterized by being inclined about 30 degrees or about 60 degrees with respect to the part.

  In a preferred embodiment, the solar cell module includes the octagonal solar cell element at least at an end of the solar cell module, and the solar cell module includes the dodecagonal solar cell element inside the solar cell module. Regarding modules.

  A preferred embodiment relates to the solar cell module, wherein the solar cell module has a function of changing the electrical connection of the polygonal solar cell elements by changing an electric circuit in the inter-element connection component.

  In a preferred embodiment, the inter-element connection part has a circuit changing mechanism, and has a function of changing an electric circuit in the inter-element connection part by an external action. Regarding modules.

  A preferred embodiment relates to the solar cell module, wherein the inter-element connection component includes a connector for connecting a wiring member to the incident surface side, the back surface side, or both with the base material interposed therebetween.

  In a preferred embodiment, the inter-element connection component has a hierarchical structure in which a plurality of the base materials are stacked, and a circuit is formed by electrical connection between the hierarchical structures at a predetermined position. The present invention relates to the solar cell module.

  A preferred embodiment relates to the solar cell module, wherein the electrical connection between the hierarchical structures is formed by a resin containing conductive particles.

  A preferred embodiment relates to the solar cell module, wherein one base material is directly connected to only one polygonal solar cell element.

  The loss can be reduced by cutting the semiconductor substrate into a polygonal shape close to a circle, and the electrical connection is made through the inter-element connection parts in the blank portion that is geometrically generated by cutting into the shape, so that the space between the solar cell elements Can be reduced to the limit, filling efficiency of the solar cell element can be improved, and wiring connection with a space margin can be made in the blank portion, so that a relatively free wiring design is possible and the yield is also reduced. To do. By changing the circuit of the inter-element connection component, the function as a module can be maintained high depending on the situation.

It is a figure which concerns on the manufacturing method of this invention. It is a figure which concerns on the board | substrate arrangement | positioning for controlling film forming in the local area | region of a board | substrate. It is a figure which concerns on Example 1 of this invention. It is a mask figure concerning Example 2 of the present invention. It is a figure which concerns on Example 2 of this invention. It is a figure which concerns on Example 3 of this invention. It is a figure which concerns on Example 4 of this invention. It is a figure which concerns on the connection status change of Example 4 of this invention. It is a circuit pattern figure concerning Example 4 of the present invention. It is a figure which concerns on Example 5 of this invention. It is a figure which concerns on Example 6 of this invention. It is a figure which concerns on Example 7 of this invention. It is a figure which concerns on the comparative example 1 of this invention. It is a figure which concerns on the comparative example 2 of this invention.

  The solar cell module according to the present invention is a solar cell module formed by combining polygonal solar cell elements made of a semiconductor substrate, and has a blank portion that is geometrically generated when the polygonal solar cell elements are combined. The polygonal solar cell elements adjacent to each other are electrically connected in the blank portion.

  The semiconductor substrate to which the present invention can be applied is not particularly limited, and examples thereof include single crystal or polycrystal silicon and germanium substrates, single crystal gallium arsenide, and gallium nitride substrates. The present invention is effective regardless of the conductivity type of the semiconductor substrate.

  The effect can be obtained by both the type in which the solar cell element used in the solar cell module has electrodes on both sides and the type having both positive and negative electrodes on the back side. Regarding electrical connection, solar cell elements of the above type are connected in series, or a pattern that combines series and parallel, when the incident polarities of adjacent elements are the same or different, and when the electrode extraction type is the same or different In any case, the effect can be obtained. Among them, the more complicated the wiring for electrical connection is, the more effective it is when it is necessary to route the wiring between the incident surface and the back surface, when parallel connection and series connection are used together, or when the arrangement of elements to be wired is complex. large.

  According to the present invention, the degree of freedom in arranging the solar cell elements in the solar cell module is increased, so that more efficient element shape, arrangement, and electrical connection can be selected.

  The shape of the solar cell element that is easy to fill is preferable, and mathematically, if the combination of figures is such that the total inner angle of adjacent element shapes is 360 degrees, the closest packing is possible in the surface. If the combination with the same shape for arranging without gap is given, close packing is possible if it is a triangle, a quadrangle, or a hexagon. However, if these figures are cut out as they are, a lot of cutout loss occurs, and a blank part used in the present invention cannot be obtained. Therefore, a pseudo quadrangle in which the circumference of the base cylinder ingot is left at the apex of the quadrangle as shown in FIGS. 1A and 1B, or a pseudo hexagon in which the circumference of the base cylinder ingot is left at the apex of the hexagon is shown. preferable. Thus, it is preferable to cut out a part of the circumferential portion from the viewpoint of reducing the cutting loss. Further, as shown in FIGS. 1 c and 1 d, the octagonal solar cell element that faces the circumferential portion of the pseudo-rectangular shape and the dodecagonal solar cell element that faces the circumferential portion of the pseudo-hexagonal shape. Is more preferable.

  Regarding the arrangement of elements, when different shapes are combined, a combination of an octagon and a rectangle, a combination of a dodecagon and a triangle, and the like can be given. In the case of such a combination of different figures, a shape with a large number of vertices is necessarily larger. By making this figure with a large number of vertices a shape that is not a regular polygon but the lengths of adjacent sides are alternately different and the lengths of the opposing sides are equal, the size of the figure with a small number of vertices can be further increased. Can be small. And as shown to e and f of FIG. 1, it is preferable to set it as a blank part without placing an element in this small figure part.

  The term “blank part” as used herein means a blank part surrounded by element sides that are geometrically generated between elements or between an element and a module end when various types of solar cell elements are filled. As shown by solid lines in e and f of FIG. 1, it means a rectangular or triangular blank portion formed when solar cell elements having an octagonal shape or a dodecagonal shape are arranged. Further, when the elements of the above-described pseudo-rectangular shape or pseudo-hexagonal shape are arranged, the gap generated by the circumferential portions shown in FIGS. 1A and 1B corresponds to the blank portion in this case. On the other hand, the sides of the elements indicated by dotted lines in FIGS. E and f are adjacent to each other in parallel, and a portion that can be brought close to the limit does not hit the blank portion.

  In addition, the module is usually a flat rectangular shape, but it is preferable that the combined shape of the elements matches and is filled in the module surface. Even if elements having a hexagonal shape, an octagonal shape, a dodecagonal shape, or the like are arranged, it does not become a square shape. Therefore, it is preferable to combine them in a rectangular shape by combining the above-mentioned shapes. At that time, it is preferable that the areas of all the elements are the same. In addition, it is possible to combine non-divided elements and divided elements and arrange them in a square shape. In that case, the divided elements are connected in parallel to obtain a current equivalent to that of the non-divided elements. It is preferable to connect in series with non-divided elements, or to create a series circuit with divided elements and non-divided elements and take them out separately.

  Moreover, it is preferable that all electrical connections with adjacent elements are made in the blank portion. Therefore, it is preferable that elements to be connected are adjacent to each other through at least a blank portion. It is more preferable that the elements to be connected are connected via two or more blank portions. When electrical connection is made even in a portion other than a blank portion, it is preferable that the connection is not a connection in which wiring is routed between the incident surface and the back surface, but a simple connection in which the incident surface and the incident surface are connected between adjacent elements. .

  Further, it is preferable from the viewpoint of handling and manufacturing that the positive and negative lead wires for taking out the output from the module are also electrically connected in the inter-element connection parts in the blank portion. Further, from the viewpoint of simplifying the system by reducing the series resistance and the crossover wiring, it is preferable to connect all the elements so that the positions of the positive and negative lead wirings are as close as possible.

  In a solar cell, a collector electrode for taking out carriers that have moved by a diffusion potential is used. There are two types, a first collector electrode that is thinly arranged on the entire surface of the device and a second collector electrode that collects the current collected by the first collector electrode and transmits it to the wiring member. The collector electrode is formed by kneading metal fine particles together with a binder on a solar cell element by screen printing, letterpress printing, ink jet printing, or the like, and firing or drying. As a technique to improve conductivity by reducing the metal fine particle interface while packing metal fine particles at high density, a technique that combines metal fine particles of different sizes and shapes is used not only as a collector electrode but also as an electrode forming technique. Yes. A thermosetting resin is used for the binder.

  Conventionally, electrical connection of elements that has been performed in the non-blank portion is performed in the blank portion, so that more complicated wiring can be performed. In order to make an electrical connection in the blank portion, it is preferable that the second collector electrode connected to the wiring member is present in the vicinity of the side constituting the blank portion in a direction perpendicular to the side. As shown in FIG. 1, in the element shape, blank portions are generated at four places around the pseudo square or octagonal element and at six places around the pseudo hexagonal or dodecagonal element. In order to arrange the second collector electrode at an angle close to perpendicular to the sides constituting the blank portion in the vicinity of the blank portion, the second collector electrode is arranged so as to connect the blank portions facing each other across the vicinity of the center of the element. It is preferable to do. In addition, as shown in FIG. 5, it is desirable that the second collector electrodes are in contact with each other in the vicinity of the center of the element from the viewpoint of reducing the series resistance and securing the degree of freedom of wiring. In addition, it is preferable that the positive and negative second collector electrodes be arranged so as to be separated to the extent that the wiring member does not contact at least in the vicinity of the blank portion. By doing so, the positive second collector electrode and the negative second collector electrode of the same element can be easily connected to the same inter-element connection component while preventing a short circuit in the blank portion. In addition, when adjacent elements are connected in series via inter-element connection parts, the polarities of the wiring members passed from these elements are connected so as to be alternately reversed along the periphery of the inter-element connection parts. It is preferable from the viewpoint of circuit simplification of the inter-element connection component.

  The shape of the collector electrode is not particularly limited, but must be designed according to the form of the second collector electrode. As described above, when the second collector electrode is arranged so as to connect the opposing blanks across the vicinity of the center of the element, the first collector electrode is substantially concentric with the outline of the element as shown in FIG. It is preferable from the viewpoint of the series resistance in the element that they are arranged so as to imitate the shape. In addition, when such a collector electrode is produced by a printing method using a mask such as screen printing, the first collector electrode is partially disconnected, and a concentric and similar first collector electrode having a different size from the element is formed. This is preferable from the viewpoint of simplicity in printing. In this case, in order to ensure that the second collector electrode is in electrical contact with the first collector electrode and the second collector electrode, as shown in FIG. It is preferable to increase the size of the second collector electrode.

  A wiring member is connected to the second collector electrode. This wiring member has a pattern in which thin metal wires or metal foils are connected by solder, a conductive adhesive, an insulating adhesive, a resin adhesive layer containing conductive fine particles, or the like, and a metal plating layer on the surface of the insulating substrate The pattern etc. which connect things are mentioned. As described above, when the second collector electrode is arranged so as to connect the blank portions facing each other across the vicinity of the center of the element, the second collector electrode contacts and intersects near the center of the element as shown in FIG. It is desirable from the viewpoint of reducing the series resistance and securing the degree of freedom of wiring. When connecting a wiring member to a portion where the second collector electrode intersects, it is preferable to take measures to relieve stress. In order to relieve the stress in this case, let the connecting element to be connected later adopt a reject-shaped structure, do not connect the connecting element to be connected later in the vicinity of the intersection, and have some flexibility Such wiring members are connected except for the intersecting portion, and connected to the end of the other wiring member. A wiring member having a cross shape in advance is created and connected to the collector electrode.

  Moreover, the electrical connection of the solar cell element in the solar cell module can be changed according to the present invention. For this reason, when some elements fail or when shadows appear on some elements, light irradiation of some elements is concentrated on concentrating solar cell modules or solar cell modules with elements arranged on the concave surface. In such a case, the device connection circuit is changed according to various situations, such as when output to another extraction electrode is required in a solar cell module having a plurality of extraction electrodes, so that the optimal device connection state is maintained in any situation. It becomes possible to do. For that purpose, it is preferable that the positive electrode 2nd collector electrode and the negative electrode 2nd collector electrode of a solar cell element are electrically connected with the element connection components of all the blank parts which adjoin. In this way, if the circuit of the inter-element connection component is changed, it becomes possible to electrically connect a certain element to any adjacent element via a blank portion, and the connection mode is made in series connection. You can change whether it is connected in parallel. In addition, it is preferable that a plurality of extraction electrodes exist from the viewpoint of improving the situation in which the function of all the elements near the extraction electrode is deteriorated when the extraction electrode fails.

  If a function for merely reconfiguring a circuit that avoids a failed cell when a part of the elements fails is required, the function may be such that the circuit can be manually reconfigured. On the other hand, when obtaining an optimum element connection method in real time, it is preferable that the inter-element connection component has a mechanism capable of controlling the circuit of the inter-element connection component from the outside by electromagnetic force, compressed air, stress, or the like.

  The inter-element connection component has a base portion having a plurality of connectors for electrical connection with the wiring member, a circuit portion for connecting the connectors, and the circuit portion is a circuit portion having another circuit Those that change the connection direction of the circuit unit by changing or changing the connection direction of the circuit unit, those that have a mechanism to change the circuit configuration of the circuit unit by applying external force such as electromagnetic force or stress to the circuit unit, etc. Can be mentioned. The mechanism for changing the circuit configuration by an external force is a technique that can be easily achieved by using a switching mechanism such as a known bistable relay. From the viewpoint of controlling the circuit configuration from outside the sealing, it is preferable to use an electromagnetic force as an external force.

  On the other hand, a cost-oriented solar cell module is required to be simpler and easier to manufacture than changing the connection between elements. From the viewpoint of the degree of freedom of connection of connectors of inter-element connection components, the connector itself is made of a metal foil such as copper with good solder wettability, and the wiring member is connected to the same metal foil from adjacent elements. A simple mechanism that connects between them is preferred. Further, in order to increase the adhesive strength between the connector and the wiring member, a mechanism for fixing the wiring member in the vicinity of the connector portion or in the connector itself may be provided.

  Usually, the blank portion that can be formed by arranging the polygonal elements having the circumferential portion at the apex so as to reduce the cutting loss is about ten times as large as the distance in which the wiring member is conventionally routed. There is sufficient margin even in consideration of providing an inter-element connection component in the blank portion and drawing from the back surface or incident surface of the element to the incident surface or back surface of the inter-element connection component. In the future, if the cost decreases as the semiconductor ingot creation technology improves, it is considered that the blank portion becomes smaller. In such a case, it is preferable that a connector is disposed on each of the incident surface and the back surface side of the inter-element connection component in order to provide more allowance for the routing of the wiring member. From the viewpoint of preventing more complicated circuit configurations and unexpected short-circuits, one connector exists on either the incident side or the back side, and each connector may be connected by a circuit. From the viewpoint, one connector itself may exist through the inter-element connection component. In addition, it is a method of performing electrical connection between the solar cell element and the inter-element connection component that is not limited to the two layers of the incident surface and the back surface, but a plurality of planes, but when connecting in various directions, From the viewpoint of simplifying the work, it is preferable to attach a wiring member to the solar cell in advance as shown in FIG. 2 and then connect the wiring member and the inter-element connection component. At that time, it is preferable to provide a mechanism that absorbs stress generated by the displacement of the position of the connector part of the inter-element connection component and the wiring member. This includes providing a flexible conductive member between the wiring member and the inter-element connection component, or having a mechanism for moving the connector of the inter-element connection component.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to a following example.

Example 1
FIG. 3 is a schematic diagram showing the solar cell module as seen from the incident surface side of Example 1 according to the present invention. A cross section of the columnar single crystal silicon ingot was surfaced so as to form a pseudo-rectangular shape as shown in FIG. 1a and sliced into a wafer to obtain a semiconductor substrate. The solar cell element 1 was obtained by bonding and forming on both surfaces of the semiconductor substrate and forming a collecting electrode. As shown in FIG. 4, the second collector electrode is formed in parallel with the connection direction of the elements, and the incident side wiring member 2 and the back side wiring member having a structure bent near the blank portion on the second collector electrode. 8 were connected with solder. The solar cell elements 1 were arranged in order from the position close to the negative electrode side extraction electrode, and the incident side wiring member 2 and the back surface side wiring member 8 were connected in the blank portion. The connection was turned back through the crossover wiring member 3. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Example 2)
FIG. 4 is a schematic diagram showing the solar cell module as seen from the incident surface side of Example 2 according to the present invention. FIG. 5 schematically shows the collector electrode of Example 2 according to the present invention and the mask used to form the collector electrode. In Example 2, a pseudo-rectangular semiconductor substrate was cut out and joined to form a collector electrode as in Example 1, but the collector electrode shape is different as shown in FIG. Specifically, a conductive paste made of Ag fine particles and epoxy resin was screen-printed using the mask shown in FIG. 5b and cured by heating. Then, the solar cell element 1 was obtained by similarly forming a 2nd collector electrode using the mask shown to c of FIG. The first collector electrode has a plurality of similar shapes that are substantially concentric with the shape of the pseudo-rectangular element, and all ends thereof are connected to the second collector electrode. A portion of the second collector electrode that contacts the first collector electrode has a wide hexagonal portion.

  The solar cell element 1 in which the incident-side wiring member 2 and the back-side wiring member 8 were connected to the second collector electrode was spread and connected via the inter-element connection component 5 as shown in FIG. As shown in FIG. 4 b, the inter-element connection component 5 is disposed in a blank portion geometrically generated by a circumferential portion remaining at the apex when the pseudo-rectangular solar cell elements 1 are arranged, and the blank portion A quadrangular shape is formed so as to substantially match the shape. In this quadrangular inter-element connection component, two triangular metal foils are arranged apart from each other, and the incident side wiring member 2 and the back surface side wiring member 8 of adjacent elements are connected to the same metal foil. Are connected in series. A series connection circuit is formed between all the elements by changing the direction of the inter-element connection component 5 and the polarity of the wiring member to be connected.

  Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Example 3)
FIG. 6 is a schematic diagram showing the solar cell module as seen from the incident surface side of Example 3 according to the present invention. In Example 3, the position of the second collector electrode is formed on the incident side and the back surface side so as to be separated by a distance of 2 to 3 widths of the second collector electrode, on which the incident side wiring member 2 and the back surface side wiring member are formed. 8 is different from that of the second embodiment in the point that 8 is connected, the shape of the inter-element connection component 5, and the connection method to the inter-element connection component 5. Along the periphery of the inter-element connection component 5, the polarity of the second collector electrode to which the wiring member is connected is alternately reversed. The inter-element connection component 5 has circular connectors having a diameter of about two widths of the second collector electrode on the incident side and the back surface side, and adjacent sides of the inter-element connection component 5 as shown in FIG. Are short-circuited. FIG. 6 c shows the structure of the inter-element connection component 5. As shown in FIG. 6 c, the inter-element connection component 5 is formed by stacking four “cube-shaped” base materials. An incident side connector and a back side connector made of metal foil are respectively arranged on both surfaces of each substrate, and one substrate is connected to only one element. A wiring member connected to the incident side of the element is connected to a wiring member connected to the back side of the element. As shown in FIG. 6c, a conductive adhesive made of resin containing metal fine particles is disposed on the incident-side connector of the base material, and an insulating adhesive is provided in a region where the connector on the base-material incident side is not disposed. Has been placed. No adhesive is disposed on the substrate 4. The base materials 1 to 4 were connected by heating in the order of the base materials 1 to 4 in the vicinity of the glass transition point of the stacked resin. The incident side connector of the base material 1 is a back surface side connector of the base material 2, the incident side connector of the base material 2 is a back surface side connector of the base material 3, and the incident side connector of the base material 3 is a back surface side connector of the base material 4. Each is connected via a conductive adhesive. Also in the blank portion other than the blank portion enlarged in FIG. 6b, two to four base materials were connected in accordance with the connection of the designed elements to obtain electrical connection.

  Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Example 4)
FIG. 7 is a schematic diagram showing the solar cell module as viewed from the incident surface side of Example 4 according to the present invention. FIG. 8 is a schematic diagram showing the solar cell module viewed from the incident surface side when the connection state between the solar cell elements of Example 4 according to the present invention is changed. FIG. 9 is a schematic diagram showing a circuit pattern of an inter-element connection part of Example 4 according to the present invention. In Example 4, as shown in FIG. 7b, both the positive and negative second collector electrodes located in the blank portions of all the solar cell elements 1 in contact with the inter-element connection component 5 are connected to the incident side wiring member 2 and the back side wiring member. 8 is connected to the inter-element connection component 5, and the inter-element connection component has four types of circuits as indicated by dotted lines in FIG. 9, and there is a control function for each circuit. This is different from the third embodiment in that the inter-element connection component 5 has a latching relay function for circuit control. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film. At this time, the circuit of the inter-element connection component 5 sealed together is controlled from the outside using an electromagnet. An external electromagnet is arranged for each of the four circuits. By changing the external electromagnet with three types of application of a magnetic field in two directions and without application of a magnetic field, the four elements of the inter-element connection component 5 inside the seal are changed. The circuits can be controlled to be OFF, ON, and hold, respectively.

(Example 5)
FIG. 10a is a schematic diagram showing the solar cell module as seen from the incident surface side of Example 5 according to the present invention. In Example 5, as shown in FIG. 1d, a semiconductor substrate was obtained by slicing into a dodecagon shape and slicing into a wafer shape. Thereafter, a dodecagonal solar cell element 10 was formed through steps such as junction formation and collector electrode formation. The octagonal solar cell obtained by dividing the dodecagonal solar cell element 10 obtained in this way into halves by a line connecting the midpoints of the long sides facing each other by a dicing saw, scriber or the like, or a line connecting the midpoints of the opposing short sides Element 9 was created. As shown in FIG. 10, a dodecagonal solar cell element 10 that is arranged so that the longest sides of the two types of octagonal solar cell elements 9 divided at the end of the module are in contact with each other and that is not divided is arranged. A triangular inter-element connection component 5 is disposed in the blank portion, and as shown in FIG. 10b, adjacent octagonal solar cell elements are connected in parallel via the connection component 5 to form a dodecagonal solar cell. The element 10 is connected in series. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Example 6)
FIG. 11: is a schematic diagram which shows the solar cell module seen from the entrance plane side of Example 6 according to this invention. In Example 6, the 1st solar cell element 15 of the shape obtained by dividing | segmenting in half by the line | wire which connects the midpoint of the long side which opposes the dodecagonal solar cell element 10, and the midpoint of the short side which opposes This is different from Example 5 in that only the second solar cell element 16 having a shape obtained by dividing the line in half is used, the element arrangement, and the connection mode. A first element set 17 formed by combining two first solar cell elements 15 into the dodecagonal shape and a second element set 18 formed by combining two second solar cell elements 16 into the dodecagonal shape are formed. The first element set 17 and the second element set 18 are arranged adjacent to each other in the vertical and horizontal directions, the first solar cell elements 15 are arranged in the lacking portions present on the left and right, respectively, Two solar cell elements 16 are arranged, and the upper, lower, left and right peripheral parts constituted by arranging the elements are linearly formed, except for the case where they are adjacent in the first element set 17 and the second element set 18. It arrange | positioned so that a solar cell element may adjoin another solar cell element through two or more blank parts. As shown in FIG. 11 b, the positive and negative wiring members are separated from each other, and the positive and negative wiring members of the same first solar cell element 15 are connected to one inter-element connection component 5. Are connected separately to the adjacent second solar cell elements 16. Moreover, in Example 6, all the octagonal solar cell elements 9 are connected in series via adjacent elements and inter-element connection parts 5 present in two blank portions. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Example 7)
FIG. 12 a is a schematic diagram showing the solar cell module viewed from the incident surface side of Example 7 according to the present invention. In Example 7, the hexagonal solar cell element obtained by dividing into four by the line connecting the midpoints of the long sides facing the dodecagonal solar cell element 10 and the line connecting the midpoints of the opposing short sides The difference from Example 6 is that only 19 is used. As shown in FIG. 12 a, four hexagonal solar cell elements 19 were combined to form a third element set 20 having a dodecagon shape. The third element set 20 is arranged so as to be the most dense, and the hexagonal solar cell elements 19 are arranged in the lacking portions around the periphery, so that the upper, lower, left and right peripheral portions in a combined state are linear. . At this time, the third element group 20 is arranged so that the dividing line of the third element group 20 is approximately 30 degrees or approximately 60 degrees with the upper, lower, left and right peripheral portions. Here, the dividing line refers to a line connecting the midpoints of the long sides facing the dodecagonal solar cell element 10 and the midpoint of the opposing short sides when the dodecagonal solar cell element 10 is divided into four. It means a connecting line. As shown in FIGS. 12 b and 12 c, the positive and negative wiring members are separated, the positive and negative wiring members are connected to one inter-element connection component 5, and the adjacent circuits in the inter-element connection component 5 are separated from each other. It is divided and connected to the element 16. As shown in FIG. 12d, the electrical connection between the elements is made, and all the connections between the elements are made via the inter-element connection component 5 arranged in the blank portion. Finally, the take-out electrode 4 was connected, and a PET film as a protective film was laminated using an EVA resin as a filler and a protective glass plate as a substrate.

(Comparative Example 1)
FIG. 13 is a schematic diagram showing the solar cell module viewed from the incident surface side of Comparative Example 1 according to the present invention. In Comparative Example 1, a semiconductor substrate was obtained by slicing and slicing so that the cross section of the columnar single crystal silicon ingot had a pseudo regular hexagonal shape as shown in FIG. Then, the pseudo-regular hexagonal solar cell element 1 was formed through steps such as junction formation and collector electrode formation. A hexagonal solar cell element 1 obtained by dividing the hexagonal solar cell element 1 in this way into four parts by a line connecting the midpoints of opposing sides and a line connecting the opposing apexes by a dicing saw, scriber or the like was created. As shown in FIG. 13, the trapezoidal solar cell elements 1 are packed in a close-packed manner so that the hypotenuses are in contact with each other, and the non-blank portions where the hypotenuses of adjacent elements are adjacent are connected in parallel. In the non-blank portion adjacent to the formed side, the wiring member was routed from the incident surface side to the back surface side to form a series connection. The elements arranged in this way were connected in a straight line, and the folded part was folded using the crossover wiring member 3. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

(Comparative Example 2)
FIG. 14 is a schematic diagram showing a solar cell module viewed from the incident surface side of Comparative Example 2 according to the present invention. In Comparative Example 2, the cylindrical ingot was faced in a regular hexagonal shape, the wafer was cut out, joined, and electrodes were formed, and then the regular hexagonal solar cell element was divided in half by a dicing saw, scriber, etc. . Two hexagonal solar cell elements obtained by dividing a regular hexagonal solar cell element in half by a line connecting opposing vertices are combined to form a regular hexagonal shape. Are arranged adjacent to each other, trapezoidal elements are arranged adjacent to the left and right missing portions, respectively, and the side edges of the left and right elements are straightened. In addition, the pentagonal solar cell element obtained by dividing the upper hexagonal solar cell element in half at the upper end or lower end by a line connecting the centers of the opposite sides of the regular hexagonal shape is parallel to the side facing the adjacent solar cell element. The side edges of each element at the upper end or the lower end were made linear. The elements arranged in this way were connected in a straight line, and the folded part was folded using the crossover wiring member 3. Finally, the take-out electrode 4 was connected, and an EVA resin as a filler and a protective glass plate as a substrate were laminated with a PET film as a protective film.

  In Example 1, since the wiring member is connected in the blank part, the gap of the solar cell element 1 which is a non-blank part can be made smaller than the gap in the parallel connection part of Comparative Example 1.

  In the second embodiment, a triangular metal foil serving as a connector and a circuit is used in the blank portion, and the square inter-element connection component 5 is used. By doing so, a degree of freedom can be obtained at a portion where a circuit formed by connecting elements in series is folded, and a crossover wiring member is not necessary. Further, regarding the arrangement of the extraction electrode, it is possible to eliminate or extremely reduce the use space of the crossover wiring member by arranging it on the adjacent element. In addition, by arranging the first collector electrode so that the two second collector electrodes intersect each other and is substantially concentric with and similar to the element, an increase in series resistance when connecting the elements is suppressed, Even when a failure occurs in the first collector electrode and the wire is disconnected, current can be recovered from the second collector electrode connected separately. In the embodiment, from the viewpoint of handling when printing the first collector electrode, the first collector electrode is partially interrupted at the portion where the first collector electrode and the second collector electrode intersect, but these are staggered, It may be completely crossed.

  In Example 3, the second collector electrode is formed at different positions on the incident surface side and the back surface side, and the incident side wiring member 2 and the back surface side wiring member 8 are also connected so as to be separated in the blank portion. By connecting the connection members 2 and 8 from the same solar cell element to the same inter-element connection component 5, it is possible to design a connection that can be obtained in two blank portions even in a portion where the circuit is folded. Regarding the configuration of the inter-element connection component 5, a base material is connected to each element in contact with the blank portion, and a circuit is formed by overlapping and connecting the base materials. The base material shape does not need to be particularly “shaped”, and may be a different shape such as a rhombus or a circle. Not only is the workability good, but the connection can be made even if the position of the base material is slightly shifted, so that it functions as a buffer for relaxing stress and adjusting the position between solar cell elements. In this embodiment, the extraction electrode 4 is the upper center, but the extraction electrode 4 may be arranged at the center of the module. In this case, in order to obtain electrical connection between the base materials, the conductive adhesive was used only for a part of the base materials. However, when a conductive adhesive having an anisotropic conductive function is used, You may use for the base-material whole surface to such an extent that it does not protrude. Further, an insulating adhesive and solder may be combined.

  In Example 4, all the second collector electrodes of all the solar cell elements 1 are electrically connected to the inter-element connection component 5 using a wiring member. The wiring members are arranged so that the polarities of the wiring members are alternately reversed along the periphery of the inter-element connection component. The inter-element connection component has a circuit connecting the positive electrode and the negative electrode of adjacent solar cell elements inside, and has a mechanism for changing the on / off function of this circuit. The circuit can be changed by controlling on / off of the circuit by an electromagnet from outside the seal. As shown in FIG. 8, when the lower right four solar cell elements fail, the circuit of the inter-element connection component 5 is changed as shown in the enlarged view of FIG. The method can be changed as shown by a dotted arrow in FIG. 8, and a circuit using only the solar cell element 1 which is not broken can be formed. In preparation for the case where the solar cell element 1 in the vicinity of the extraction electrode 4 fails, the extraction electrode may be provided at another location.

  In Example 5, the solar cell module is formed by combining the dodecagonal solar cell element 10 and the octagonal solar cell element 9 obtained by dividing the dodecagonal solar cell element 10 in half. The octagonal solar cell elements 9 need to be connected in parallel and connected in series with the dodecagonal solar cell element 10. Since the blank portion is sufficiently wider than the non-blank portion of Comparative Example 1, the parallel connection portion and the series connection portion are accommodated in the same inter-element connection component 5, and the connection circuit is bent at the inter-element connection component 5 of the blank portion. Thus, it is possible to freely design a circuit like a one-stroke drawing. In this embodiment, the dodecagonal solar cell element 10 is used. However, the pseudo hexagonal solar cell element in which the short sides facing each other of the dodecagonal solar cell element 10 leave the circumferential portion of the circular ingot is used. Also good. However, in the case of the twelve-sided shape, compared to the half-divided pseudo hexagonal element, there is no circumferential part, it is easy to define the apex part, and there is no protrusion of the circumferential part in the blank part. The distance between the element 5 and the element can be made constant, and the position can be easily adjusted. Compared to Comparative Example 1, the number of non-blank portions is small and the interval between the non-blank portions is small, so that the solar cell element 1 can be filled in a narrower area. Further, in the present embodiment, the divided solar cell elements are connected in parallel and connected in series with those not divided, but an extraction electrode may be provided at two locations in the module to separately extract the current.

  In Example 6, the module is formed only by the first solar cell element and the second solar cell element obtained by dividing the dodecagonal solar cell element in half. The 1st element group 17 and the 2nd element group 18 are combined so that it may become the most dense, and the 1st solar cell element 15 or the 2nd solar cell element 16 is arrange | positioned in the lack part of the circumference | surroundings. By carrying out like this, the electrical connection between all the solar cell elements can be performed through the inter-element connection component 5 arranged in at least two blank portions, and the inter-element connection component 5 is passed through only one. Compared with the case of connection, reliability such as series resistance and yield is excellent. Also in this example, a pseudo pentagonal solar cell element and a pseudo trapezoidal solar cell element obtained by dividing the pseudo hexagonal solar cell element may be used as in Example 5. Even in that case, the second embodiment is different from the second comparative example in that both the edge dividing element group and the vertex dividing element group are used.

  In Example 7, only the hexagonal solar cell element 19 obtained by dividing the dodecagonal solar cell element 10 into four parts is used, and the four hexagonal solar cell elements 19 are combined to form the third element set 20. By disposing the third element set 20 so that the dividing line of the third element set 20 is approximately 30 degrees or approximately 60 degrees with the peripheral portions of the upper, lower, left and right sides, all the elements of the solar cell element 19 are closely packed. It is possible to perform electrical connection between the devices via the inter-element connection component 5 disposed in the blank portion. In the present embodiment, all the third element groups 20 are arranged so that the angle of the dividing line is inclined at approximately 30 degrees or approximately 60 degrees with respect to the peripheral edge. And may be parallel. Since the solar cell element divided into four is used, the absolute value of the current is small and the wiring can be made thin. Similarly to Example 5, a pseudo trapezoidal solar cell element obtained by dividing the pseudo hexagonal solar cell element into four may be used.

1. Solar cell element 2. Incident side wiring member 3. Crossover wiring member Extraction wiring 5. Inter-element connection parts 6. Connector 7. Second collector electrode separation portion 8. Back side wiring member 9. Octagonal solar cell element 10. 12. Dodecagonal solar cell element Conductive adhesive part 12. Insulating adhesive part 13. Incident side connector 14. Back side connector 15. First solar cell element 16. Second solar cell element 17. First element set 18. Second element set 19. Hexagonal solar cell element 20. Third element set

Claims (15)

  It is a solar cell module formed by combining polygonal solar cell elements, and has a blank portion that is geometrically configured by non-adjacent sides when the polygonal solar cell elements are combined. The solar cell module, wherein the polygonal solar cell element is electrically connected in the blank portion.   The solar cell module according to claim 1, wherein an inter-element connection component is provided in the blank portion.   The polygonal shape in which the positive and negative wiring members at least in the vicinity of the blank portion of the polygonal solar cell element do not overlap when viewed from the direction perpendicular to the surface of the polygonal solar cell element and are in contact with the inter-element connection component The solar cell module according to claim 1 or 2, wherein both the positive electrode side and negative electrode side wiring members of the solar cell element are electrically connected to the same inter-element connection component.   The collector electrode comprises a first collector electrode that collects current from a solar cell and a second collector electrode that collects current from the first collector electrode and is electrically connected to a wiring member. The first collector electrode is arranged so as to connect the blank portions facing each other across the vicinity of the center, and the first collector electrode is substantially concentric with the outline of the polygonal element and partially forms a similar shape. The solar cell module according to claim 1, wherein the solar cell modules are partially separated.   The polygonal solar cell elements are the octagonal solar cell elements in which the opposite sides are equal in length and each of the dodecagons having two types of short sides and long sides is divided in half. A first solar cell element in which the dodecagon is divided in half by a straight line passing through the midpoint of the opposing long side, and a first solar cell element in which the dodecagon is divided in half by a straight line passing through the midpoint of the opposing short side A solar cell module composed of two solar cell elements, wherein the first element set formed by combining two of the first solar cell elements into the dodecagonal shape and the tenth element combined with two of the second solar cell elements. A second element set having a square shape is formed, the first element set and the second element set are arranged adjacent to each other in the vertical and horizontal directions, and the first solar cell element is arranged in each of the missing portions on the left and right sides. And the second solar cell element in each of the missing portions above and below A solar cell module in which the upper, lower, left, and right peripheral edges constituted by arranging the elements are linearly formed, except for the case where they are adjacent in the first element set and the second element set. The solar cell module according to any one of claims 1 to 4, wherein the first and second solar cell elements are adjacent to other solar cell elements via two or more blank portions.   The polygonal solar cell element is a solar cell element in which a pseudo regular hexagon having a curvature at the apex portion is divided in half, and the pseudo regular hexagon is divided in half by a straight line passing through the midpoint of the opposing sides. A solar cell module comprising a pentagonal solar cell element, and a pseudo trapezoidal solar cell element obtained by dividing the pseudo regular hexagon in half by a straight line passing through the center of the opposing pseudo vertex portion, the pseudo pentagonal solar cell element Are formed into a pseudo hexagonal shape by dividing two elements, and a vertex dividing element group is formed by combining two pseudo trapezoidal solar cell elements into the pseudo hexagonal shape, The vertex split element sets are arranged adjacent to each other in the vertical and horizontal directions, the pseudo pentagonal solar cell elements are arranged in the lacking portions present on the left and right, respectively, and the pseudo-pentagonal solar cell elements are disposed in the lacking portions existing on the top and bottom. It is a solar cell module in which trapezoidal solar cell elements are arranged, and the upper, lower, left and right peripheral parts constituted by arranging the elements are linear, and adjacent to each other in the side division element set and the vertex division element set The solar cell module according to any one of claims 1 to 4, wherein all the solar cell elements are adjacent to other solar cell elements through two or more blank portions, except in the case of being present.   A solar cell module comprising a hexagonal solar cell element divided into four by a straight line passing through the midpoint of the long side facing the dodecagon and a straight line passing through the midpoint of the opposing short side, the hexagonal sun A third element set in which the four battery elements are combined to form the dodecagonal shape is disposed adjacent to the top, bottom, left, and right, and the hexagonal solar cell elements are disposed in the lacking portions existing in the peripheral portion, and the elements are disposed. A solar cell module in which the upper, lower, left and right peripheral edge portions are linearly configured, wherein the angle of the dividing line of at least one third element set is relative to the linear peripheral edge portion of the solar cell module, The solar cell module according to any one of claims 1 to 4, wherein the solar cell module is inclined at approximately 30 degrees or approximately 60 degrees.   A solar cell module composed of a pseudo trapezoidal solar cell element divided into four by a straight line passing through the midpoint of the side facing each of the pseudo hexagons and a straight line passing through the center of the opposing pseudo vertex. A fourth element set, which is formed by combining four battery elements into the pseudo hexagonal shape, is arranged adjacent to the top, bottom, left, and right, and the pseudo trapezoidal solar cell elements are respectively arranged in the lacking portions present in the peripheral portion, and the elements are arranged. A solar cell module in which the upper, lower, left and right peripheral edge portions are linearly formed, and the angle of the dividing line of at least one fourth element set is relative to the linear peripheral edge portion of the solar cell module, The solar cell module according to any one of claims 1 to 4, wherein the solar cell module is inclined at approximately 30 degrees or approximately 60 degrees.   The octagonal solar cell element is provided at least at an end of the solar cell module, and the dodecagonal solar cell element is provided inside the solar cell module. The solar cell module described.   The solar cell module according to any one of claims 1 to 9, further comprising a function of changing an electrical connection of the polygonal solar cell element by changing an electric circuit in the inter-element connection component.   11. The inter-element connection part has a circuit changing mechanism, and has a function of changing an electric circuit in the inter-element connection part by an external action. The solar cell module described.   10. The sun according to claim 1, wherein the inter-element connection component includes a connector for connecting a wiring member to the incident surface side, the back surface side, or both with the base material interposed therebetween. Battery module.   10. The inter-element connection component has a hierarchical structure in which a plurality of the base materials are stacked, and a circuit is formed by electrical connection between the hierarchical structures at a predetermined position. Or the solar cell module in any one of Claim 12.   14. The solar cell module according to claim 1, wherein the electrical connection between the hierarchical structures is formed by a resin containing conductive particles.   The solar cell module according to claim 1, wherein one base material is directly connected to only one polygonal solar cell element.