Solar Cell Module

Abstract

To stabilize the amount of power generation in a solar cell module.SOLUTION: Solar cells 20 each have an electrode on one surface of a semiconductor substrate. In a solar cell module, the plurality of solar cells 20 are aligned along a first direction D1 and a second direction D2. The electrodes of the plurality of solar cells 20 aligned in the first direction D1 are connected in series via a wiring member 31. The electrodes of the plurality of solar cells 20 aligned in the second direction D2 are also connected via the wiring member 31 so that the plurality of solar cells 20 are connected in parallel. The wiring member 31 has a belt-shaped connection part 32 extending along the second direction D2, and it is disposed between the solar cells 20 adjacent to each other in the first direction D1.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to solar cell modules. [Background technology]

[0002] A conventional solar cell module is known in which a plurality of substantially rectangular solar cells are disposed between a light-transmitting substrate and a protective member, and are arranged in a matrix within a frame. In this type of solar cell module, the matrix-shaped plurality of solar cells are connected in series to form cell groups, and the cell groups are further connected in series to form solar cell strings, and the solar cell strings are connected in parallel.

[0003] Also known is a technique in which a plurality of solar cells are arranged on a wiring sheet having wiring material on one side of an insulating substrate, the electrodes of the solar cells are connected by the wiring material of the wiring sheet, and the solar cells and the wiring sheet are fixed with an adhesive such as resin. For example, Patent Document 1 discloses a solar cell module in which the solar cells and the wiring sheet are fixed with an adhesive, and a plurality of solar cells are electrically connected in series. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-88145 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional solar cell module, if some of the solar cells are shaded by a building or have foreign matter attached thereto, the solar cell cannot receive sunlight. Even if the solar cell module is provided with a bypass diode, depending on the degree of shading of the solar cell, current may not flow through the bypass diode, and a bypass path that bypasses the shaded solar cell may not be formed. In such a case, the shaded solar cell may be in a reverse bias state, causing localized heat generation, known as a hot spot phenomenon, which may damage the solar cell or other components of the solar cell module.

[0006] The present disclosure has been made in consideration of the above-mentioned circumstances, and has as its object to provide a solar cell module that can suppress the occurrence of hot spot phenomena and stabilize the amount of power generation. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present disclosure provides a solar cell module in which a plurality of solar cells having electrodes on one surface of a semiconductor substrate are electrically connected by a wiring member, the plurality of solar cells are respectively arranged along a first direction and a second direction perpendicular to the first direction, the wiring member has a connection portion extending along the second direction and is arranged commonly to the plurality of solar cells lined up in the second direction and is arranged between the solar cells adjacent to each other in the first direction, the electrodes of the plurality of solar cells adjacent to each other in the first direction are connected by the wiring member to connect the solar cells in series, and the electrodes of the plurality of solar cells lined up in the second direction are connected by the wiring member to connect the solar cells in parallel.

[0008] More specifically, in a solar cell module having the above configuration, it is preferable that the solar cell has, as the electrodes, a first conductivity type cell electrode and a second conductivity type cell electrode arranged alternately and in parallel, a first collector electrode connected to the first conductivity type cell electrode is provided on one side of the first direction of the semiconductor substrate, and a second collector electrode connected to the second conductivity type cell electrode is provided on the other side of the first direction, the wiring member has the connection portion in a strip shape that is long in the second direction, and a plurality of tabs extending from the connection portion in the first direction, and the plurality of tabs are each connected to the first collector electrode or the second collector electrode.

[0009] In the solar cell module having the above configuration, it is preferable that the wiring member has, at the connection portion, a plurality of slits that are opened long in the second direction.

[0010] Furthermore, in a solar cell module having the above configuration, the solar cell may have, as the electrodes, a first conductivity type cell electrode and a second conductivity type cell electrode arranged alternately and in parallel, the wiring member is provided on an insulating substrate to form a wiring sheet, and has a plurality of first wirings connected to the first conductivity type cell electrodes and a plurality of second wirings connected to the second conductivity type cell electrodes, and the plurality of solar cells may be installed on the wiring sheet and connected in series in the first direction and in parallel in the second direction by the wiring member.

[0011] In this case, it is preferable that the connection portion on the wiring sheet includes a band-shaped first connection portion and a second connection portion that are continuous in the second direction, and that a plurality of the first wirings extending from the first connection portion in the first direction and a plurality of the second wirings extending from the second connection portion in the first direction are arranged alternately and in parallel. Effect of the Invention

[0012] According to the present disclosure, it is possible to stabilize the amount of power generation even if some solar cell is in a reverse bias state due to the influence of shading or the like. [Brief description of the drawings]

[0013] [Figure 1] 1 is a plan view illustrating a schematic configuration of a solar cell module according to an embodiment of the present disclosure. [Diagram 2] 1 is a plan view illustrating a schematic electrode structure on the back surface side of a solar cell provided in a solar cell module according to a first embodiment of the present disclosure. [Diagram 3] 4 is a plan view showing a part of a wiring member provided in the solar cell module. FIG. [Figure 4] 3 is a plan view showing the solar cell shown in FIG. 2 connected by the wiring member, as viewed from the back surface side. FIG. [Diagram 5] 4 is a plan view showing the rear surface side of a solar cell assembly in which a plurality of the solar cells are connected by the wiring members. FIG. [Figure 6] 11 is a plan view showing a state in which a plurality of solar cells are connected by wiring members in a solar cell module according to a second embodiment of the present disclosure, as viewed from the back surface side. FIG. [Figure 7] FIG. 11 is a plan view illustrating a schematic electrode structure on the back surface side of a solar cell provided in a solar cell module according to a third embodiment of the present disclosure. [Figure 8] 4 is a plan view illustrating a schematic configuration example of a wiring member provided in the solar cell module. FIG. [Figure 9] 4 is a plan view showing an installation form of a wiring sheet and solar cells in the solar cell module. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A solar cell module according to an embodiment of the present disclosure will be described with reference to the drawings.

[0015] FIG. 1 is a plan view illustrating a schematic configuration of a solar cell module 1 according to an embodiment of the present disclosure.

[0016] 1 shows the solar cell module 1 as viewed from the light-receiving surface side, and omits illustration of a resin layer, protective members, etc. provided in the solar cell module 1. Also, illustration of the specific configuration of the wiring member 30 provided in the solar cell module 1 is omitted, and the portion where the wiring member 30 is provided is shown in light ink color.

[0017] The solar cell module 1 includes a plurality of solar cells 20 arranged at a distance from one another, and a plurality of wiring members 30 that electrically connect the plurality of solar cells 20. The plurality of solar cells 20 are arranged along a first direction D1 and a second direction D2 perpendicular to the first direction D1.

[0018] The wiring member 30 has a strip-shaped connection portion extending along the second direction D2, and is disposed between the solar cells 20 adjacent in the first direction D1. The wiring member 30 is configured to connect the solar cells 20 aligned in the first direction D1 to each other to connect the solar cells 20 in series, and to connect the solar cells 20 aligned in the second direction D2 to each other to connect them in parallel.

[0019] A number of embodiments can be shown for the specific configuration of the wiring member 30 and the manner in which the plurality of solar cells 20 and the wiring member 30 are connected, of which embodiment 1 and embodiment 2 are described below.

[0020] (Embodiment 1) FIG. 2 is a plan view showing a schematic electrode structure on the back side of a solar cell 20 provided in the solar cell module 1 of embodiment 1, and FIG. 3 is a plan view showing a portion of a wiring member 31 provided in the solar cell module 1.

[0021] An example of the multiple solar cells 20 provided in the solar cell module 1 shown in Fig. 1 is one having a configuration shown in Fig. 2. This solar cell 20 is a back electrode type (back contact type) solar cell having an electrode 22 provided on the back surface side opposite to the light receiving surface side. A first conductivity type (e.g., n-type) cell electrode 231 and a second conductivity type (e.g., p-type) cell electrode 232 are provided as electrodes 22 on the back surface side of the semiconductor substrate 21 of the solar cell 20. Note that in Fig. 2, the first conductivity type cell electrode 231 is shown by a dashed line and the second conductivity type cell electrode 232 is shown by a solid line to make it easy to distinguish between the two electrodes.

[0022] The first conductivity type cell electrodes 231 and the second conductivity type cell electrodes 232 are provided as a number of linear electrodes extending in the same direction (first direction D1, which is the up-down direction in FIG. 2) on the rear surface of the semiconductor substrate 21. The first conductivity type cell electrodes 231 and the second conductivity type cell electrodes 232 are arranged alternately and in parallel with each other at a predetermined interval.

[0023] A first collector electrode 241 connected to a plurality of first conductivity type cell electrodes 231 is provided near one edge portion 211 in the first direction D1 of the semiconductor substrate 21 of the solar cell 20. The first collector electrodes 241 are provided at a plurality of locations spaced apart from one another in a direction (second direction D2) along the edge portion 211 of the semiconductor substrate 21. In the illustrated embodiment, three first collector electrodes 241 are formed in the edge portion 211 that is on the upper side of the solar cell 20 in the figure.

[0024] Similarly, three second collector electrodes 242 connected to the multiple second conductivity type cell electrodes 232 are provided at intervals from each other near the other edge portion 212 in the first direction D1 of the semiconductor substrate 21. The solar cell 20 is connected to the outside via these first collector electrodes 241 and second collector electrodes 242.

[0025] A silicon substrate made of polycrystalline silicon or single crystal silicon having n-type or p-type conductivity can be used as the semiconductor substrate 21. Each of the first conductivity type cell electrode 231 and the second conductivity type cell electrode 232 can be an electrode made of a metal such as silver.

[0026] The light receiving surface of the solar cell 20 is provided with an anti-reflection structure (not shown) that has unevenness such as a texture structure to suppress light reflection. An anti-reflection film (not shown) having physical properties that suppress light reflection is preferably provided on the anti-reflection structure on the light receiving surface. For example, a silicon oxide film, a silicon nitride film, or a laminate of a silicon oxide film and a silicon nitride film can be used as the anti-reflection film. In addition, a passivation film (interface passivation film) (not shown) is preferably provided on the back surface of the semiconductor substrate 21 on which the electrode 22 is provided. For example, a silicon oxide film, a silicon nitride film, or a laminate of a silicon oxide film and a silicon nitride film can be used as the passivation film.

[0027] In the solar cell module 1 according to the first embodiment, the wiring member 30 can be, for example, a wiring member 31 having a configuration shown in Fig. 3. The wiring member 31 includes a connection portion 32 extending along the second direction D2, and a plurality of tabs 33 extending from the connection portion 32 in the first direction D1.

[0028] 3, the connection portion 32 is formed in a long strip shape in the second direction D2. The tabs 33 (33a, 33b) are each extended in the vertical direction of the drawing from the connection portion 32. The tab 33a protruding in one direction in the first direction D1 (upward in the drawing) and the tab 33b protruding in the other direction in the first direction D1 (downward in the drawing) are provided at positions facing each other with the connection portion 32 in between.

[0029] A plurality of slits 34 are provided in the connection portion 32 of the wiring member 31. Each slit 34 is opened in a rectangular shape that is long in the second direction D2, and is provided at a position corresponding to a space between adjacent tabs 33 in the second direction D2. The plurality of slits 34 are disposed at equal intervals in the connection portion 32. The wiring member 31 is formed such that the shape shown in FIG. 3 continues in the second direction D2. The length of the wiring member 31 in the second direction D2 (the length of the connection portion 32) corresponds to the length of the solar cell module 1 along the second direction D2.

[0030] Such wiring member 31 is made of metal foil (e.g., copper foil) that is a conductor, and is configured such that the back side of connection portion 32 is covered with an insulating adhesive, except for tab 33 that serves as a connection portion with solar cell 20. By providing slit 34 in connection portion 32, the amount of metal foil used that constitutes wiring member 31 can be reduced, and manufacturing costs can be suppressed.

[0031] FIG. 4 is a plan view showing adjacent solar cells 20 connected together with wiring members 31, as viewed from the back side, and FIG. 5 is a plan view showing the back side of a solar cell assembly 10 in which multiple solar cells 20 are connected with wiring members 31.

[0032] 4, the multiple solar cell 20 are arranged so that the second collector 242 of one solar cell 20 adjacent to the first direction D1 butts against the first collector 241 of the other solar cell 20. In addition, in the second direction D2, the solar cell 20 are arranged so that the peripheral portions where the first collector 241 and the second collector 242 are not provided butt against each other.

[0033] The wiring member 31 is disposed along the peripheral portions of the solar cell 20 extending in the second direction D2, and is disposed in the second direction D2 across the solar cell 20. In the illustrated embodiment, the wiring member 31 is disposed between the solar cell 20 adjacent to each other in the first direction D1 and at the peripheral portions of the solar cell 20 at both ends in the first direction D1. The tabs 33a extending from the connection portion 32 of the wiring member 31 in the first direction D1 are connected to the second collector electrodes 242 of the solar cell 20, respectively, and the tabs 33b are connected to the first collector electrodes 241 of the solar cell 20, respectively. For these connections, a conductive adhesive such as solder, a conductive solder resin, or a conductive paste can be used.

[0034] The solar cells 20 arranged adjacent to each other in the first direction D1 are connected in series via the wiring members 31, and the solar cells 20 arranged adjacent to each other in the second direction D2 are connected in parallel via the wiring members 31. One wiring member 31 is provided in common to the solar cells 20 adjacent to each other in the second direction D2.

[0035] This produces a solar cell assembly 10 in which, for example, 48 solar cells 20 arranged adjacently in 6 columns and 8 rows are connected by a plurality of wiring members 31, as shown in Fig. 5. The solar cell assembly 10 can be further formed into a solar cell module 1 as shown in Fig. 1 by laminating a sealing resin such as an EVA sheet and a transparent substrate on the light-receiving surface side of the solar cell 20, and a sealing resin such as an EVA sheet and a back sheet on the back surface side, and laminating them by thermocompression bonding or the like.

[0036] In this case, eight solar cells 20 are arranged along the first direction D1, and the eight solar cells 20 are electrically connected in series via the wiring member 31 (30). Six solar cells 20 are arranged adjacent to each other in the second direction D2, and are electrically connected in parallel by one wiring member 31 (30) arranged along the second direction D2.

[0037] Therefore, in the solar cell module 1 according to the present embodiment, if a solar cell 20 in a matrix arrangement constituting the solar cell assembly 10 is in a reverse bias state due to the influence of shading or the like, it is considered that the solar cell 20 with a reduced current value will become an electrical resistance, but since the solar cell module 1 has a connection structure for both the solar cell 20 connected in series and the solar cell 20 connected in parallel, the current flows through a parallel connection circuit that bypasses the solar cell 20. This makes it possible to solve the problem that the current value of one solar cell 20 is limited by the low current value of the other solar cell 20.

[0038] This makes it possible to prevent the amount of power generated by the solar cell module 1 from decreasing due to the influence of shading, etc., and to stabilize the amount of power generated. In addition, since the occurrence of localized heat generation, known as the hot spot phenomenon, is suppressed, it is possible to reduce the risk of damage to the solar cell 20.

[0039] (Embodiment 2) FIG. 6 is a plan view showing a state in which a plurality of solar cells 20 are connected by wiring members 37 in a solar cell module 1 according to embodiment 2 of the present disclosure, as viewed from the back surface side.

[0040] The solar cell module 1 according to this embodiment is characterized by the arrangement of the solar cell 20 and the configuration of the wiring member 37, and other basic configurations are common to embodiment 1. Therefore, the characteristic configuration will be described here, and a duplicated description of the configuration common to embodiment 1 will be omitted. Also, in Fig. 6, reference symbols common to embodiments 1 and 2 indicate the same or corresponding parts.

[0041] The arrangement and connection of the multiple solar cells 20 included in the solar cell module 1 are not limited to those shown in the first embodiment, and may be implemented in various forms. The solar cell 20 may have the same configuration as that shown in FIG.

[0042] As shown in FIG. 6, the multiple solar cell 20 are arranged side by side with their edge portions along the first direction D1, where neither the first collector electrode 241 nor the second collector electrode 242 is provided, butting against each other in the second direction D2.

[0043] On the other hand, in the first direction D1, one solar cell 20 is arranged adjacently to the other solar cell 20, shifted in the second direction D2 by 1 / 2 the width of a sheet. The second collector 242 of one solar cell 20 and the first collector 241 of the other solar cell 20 that are adjacent to each other are not in an opposing positional relationship, but are arranged at positions shifted from each other in the second direction D2.

[0044] As a result, the multiple solar cell modules 20 constituting the solar cell module 1 are aligned so as to be adjacent to each other in the second direction D2, and the solar cell cells 20 in the nth row and the (n+1)th row along the second direction D2 are aligned closely to each other in the combined direction of the first direction D1 and the second direction D2. In this manner, the multiple solar cell modules 20 are arranged over the entire solar cell module 1.

[0045] An example of the wiring member 30 in the case where the solar cells 20 are arranged with a shift in the second direction D2 is the wiring member 37 shown in Fig. 6. This wiring member 37 includes a connection portion 32 extending along the second direction D2 and a plurality of tabs 33 extending from the connection portion 32 in the first direction D1, and the tabs 33a protruding to one side of the first direction D1 (upward in the figure) and the tabs 33b protruding to the other side of the first direction D1 (downward in the figure) are not positioned opposite each other with the connection portion 32 in between, but are arranged at equal intervals in the second direction D2 and extend so as to protrude alternately in the first direction D1.

[0046] The wiring member 37 is disposed in common to the multiple solar cell units 20 aligned in the second direction D2. The wiring member 37 is disposed continuously along the peripheral portions of the multiple solar cell units 20 extending in the second direction D2, and is provided so as to extend in the second direction D2 across the multiple solar cell units 20. The multiple tabs 33a of the wiring member 37 are connected to the first collector electrodes 241 of the solar cell units 20 thus arranged, respectively, and the multiple tabs 33b are connected to the second collector electrodes 242 of the solar cell units 20, respectively.

[0047] The solar cell module 1 according to the second embodiment can also have a connection structure for both the solar cell 20 connected in series and the solar cell 20 connected in parallel, and even if a solar cell 20 is in a reverse bias state due to the influence of shading or the like, the current flows through a parallel connection circuit that bypasses the solar cell 20, and the problem of the current value of the other solar cell 20 decreasing can be eliminated. In addition, the occurrence of localized heat generation called a hot spot phenomenon can be suppressed, and the risk of damage to the solar cell can be reduced. Furthermore, since the configuration allows multiple solar cell cells 20 to be arranged with a shift in the second direction D2, the solar cell module 1 can be made to have a variety of shapes that are not limited to a rectangular shape and are suited to the installation space, making it possible to effectively utilize the installation space and improve the design.

[0048] (Embodiment 3) 7 to 9 relate to a solar cell module 1 according to embodiment 3 of the present disclosure, with FIG. 7 being a plan view that typically shows the electrode structure on the back side of a solar cell 20 provided in the solar cell module 1, FIG. 8 being a plan view that typically shows an example configuration of a wiring member 35 provided in the solar cell module 1, and FIG. 9 being a plan view that typically shows an installation form of a wiring sheet 40 and a solar cell 20 in the solar cell module 1.

[0049] The solar cell 20 is a back electrode type solar cell as described above, and includes a first conductivity type cell electrode 231 and a second conductivity type cell electrode 232 as electrodes 22, as shown in Fig. 7. However, this solar cell 20 does not include a first collector electrode 241 connected to the first conductivity type cell electrode 231 and a second collector electrode 242 connected to the second conductivity type cell electrode 232 shown in Fig. 2, and instead has a plurality of linear first conductivity type cell electrodes 231 and second conductivity type cell electrodes 232 arranged alternately and in parallel on the back surface side of the semiconductor substrate 21.

[0050] In the solar cell module 1 according to the present disclosure, the wiring member 30 that connects the multiple solar cells 20 is not limited to the configuration shown in embodiments 1 and 2. As shown in this embodiment, the wiring member 30 may be a wiring member 35 that is provided on an insulating base material 41 and that constitutes a wiring sheet 40.

[0051] As shown in Figure 9, the wiring sheet 40 includes a flat insulating base material 41 and a wiring member 35 made of a conductor placed on one surface of the insulating base material 41, and is configured to electrically connect a plurality of solar cell cells 20 having the above-mentioned configuration.

[0052] Any electrically insulating material can be used for the insulating substrate 41, and for example, a substrate made of a material containing a synthetic resin material such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyvinyl fluoride (PVF), polyimide, etc. Also, the insulating substrate 41 may have a single layer structure or a multi-layer structure.

[0053] 8, the wiring member 35 includes a plurality of first wirings 351 and a plurality of second wirings 352. The first wirings 351 and the second wirings 352 are linearly arranged along the first direction D1 and alternately arranged at intervals. The wiring member 35 also includes a first connection portion 361 and a second connection portion 362 as connection portions extending along the second direction D2.

[0054] The first wirings 351 extend in the same direction from a long strip-shaped first connection portion 361 in the second direction D2. The second wirings 352 extend in the same direction from a long strip-shaped second connection portion 362 in the second direction D2. In addition, in Figs. 8 and 9, the first wirings 351 and the first connection portion 361 are shown in a light black color to make them easy to distinguish from the second wirings 352 and the second connection portion 362. In addition, the number of each of the first wirings 351 and the second wirings 352 is also shown in a schematic manner so as to make them easy to distinguish from each other, and is not intended to indicate that the number of wirings is the number shown in the drawings.

[0055] The wiring member 35 is made of a conductor mainly made of copper, and can be formed of a belt-shaped conductor (ribbon wire), rectangular wire, copper foil wire, etc. The wiring member 35 is not limited to these, and may be formed of, for example, a highly conductive metal such as gold, silver, aluminum, nickel, etc., an alloy containing these metals, or a laminate of multiple types of these metals, or may be in the form of a normal lead wire, or a flat pattern or wire pattern formed by directly applying a paste-like electrode material onto the insulating base material 41 by inkjet or the like.

[0056] In the wiring sheet 40, a plurality of first wirings 351 and first connection portions 361 connected to each of the first wirings 351 are formed to form a substantially comb shape. Similarly, a plurality of second wirings 352 and second connection portions 362 connected to each of the second wirings 352 are also formed to form a substantially comb shape. The first wirings 351 and second wirings 352, which correspond to the teeth of the substantially comb shape, are arranged to alternately interdigitate with each other.

[0057] A substantially rectangular region A formed by a combination of a plurality of first wirings 351 and a plurality of second wirings 352 shown in Fig. 8 is used as a mounting portion 42 for one solar cell 20. As shown in Fig. 9, mounting portions 42 for a plurality of solar cells 20 are provided on an insulating base material 41 of a wiring sheet 40. The number of mounting portions 42 for solar cells 20 provided on the wiring sheet 40 is not limited, and may be any number, such as 30, 42, or 48.

[0058] The second connection portion 362 and the first connection portion 361 extending in the second direction D2 are disposed adjacent to each other on the insulating base material 41. The first connection portion 361 and the second connection portion 362 are provided in a long strip shape in the second direction D2, and are provided continuously over the entire wiring sheet 40.

[0059] As shown in Fig. 9, a plurality of solar cells 20 are mounted on wiring sheet 40, and electrodes 22 on the back side of solar cells 20 are superimposed on mounting portions 42 of wiring sheet 40. In Fig. 9, the light-receiving surface side of solar cell 20 is shown.

[0060] In each mounting portion 42 of the wiring sheet 40, the first conductivity type cell electrode 231 and the second conductivity type cell electrode 232 on the back side of the solar cell 20 are connected to the first wiring 351 and the second wiring 352 of the wiring member 35, respectively, via a conductive adhesive or the like. By mounting the solar cell 20 over the entire wiring sheet 40 in this manner, a back electrode type solar cell with a wiring sheet can be fabricated. Furthermore, by arranging these components in the order of the transparent substrate, sealing resin, back electrode type solar cell with wiring sheet, sealing resin, and back sheet from the light receiving surface side, and performing thermocompression bonding or the like, a solar cell module 1 as shown in FIG. 1 can be formed.

[0061] In a solar cell module 1 using a wiring sheet 40 including such a wiring member 35, the multiple solar cells 20 are also connected in series in the first direction D1 by the wiring member 35. In the second direction D2, the first connection portion 361 and the second connection portion 362 are provided continuously and integrally with each other, so that the multiple solar cells 20 are connected in parallel in the second direction D2.

[0062] Therefore, the solar cell module 1 according to the third embodiment can also have a connection structure for both the solar cell 20 connected in series and the solar cell 20 connected in parallel, and even if a solar cell 20 is in a reverse bias state due to the influence of shading or the like, the problem of current flowing through a parallel connection circuit that bypasses that solar cell 20 and reducing the current value of the other solar cell 20 can be eliminated. In addition, the occurrence of the hot spot phenomenon can be suppressed, reducing the risk of damage to the solar cell.

[0063] As described above, in the solar cell module 1 according to the present disclosure, even if the solar cell 20 is shaded, the amount of power generated by the solar cell module 1 can be prevented from decreasing, and the amount of power generated can be stabilized. In addition, the occurrence of hot spot phenomenon can be prevented, and the risk of damage to the solar cell can be reduced.

[0064] The solar cell module 1 according to the present disclosure is not limited to the above-mentioned configuration, and may be configured in various other ways. For example, the solar cell module 1 may be suitably implemented as a solar cell module having a curved surface shape.

[0065] The type of solar cell 20 provided in the solar cell module 1 is not particularly limited, and solar cells made of various semiconductor materials such as polycrystalline semiconductors and thin-film semiconductors can be applied. The solar cell 20 is not limited to the standard size cell (a cell equivalent to one solar cell wafer, also called a full cell) illustrated, but may be a cell obtained by dividing a standard size cell in half (half cell) or a divided cell obtained by dividing a standard size cell into 1 / 3 or 1 / 4. The electrode structure on the back side of the solar cell 20 is not limited to that shown in FIG. 2 and FIG. 7, and may be any structure in terms of the shape and number of the first conductivity type cell electrode 231 and the second conductivity type cell electrode 232. In addition to the above embodiment, it is possible to configure a solar cell module 1 including solar cell cells 20 in various numbers in series by using the wiring member 30 and the wiring sheet 40. The solar cell module 1 may be configured to arrange a plurality of solar cell cells 20 in various ways in the first direction D1 and the second direction D2.

[0066] The above-disclosed embodiments are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present invention is not interpreted solely by the above-disclosed embodiments, but is defined by the claims. Also, all modifications within the scope and meaning equivalent to the claims are included. [Explanation of symbols]

[0067] 1. Solar cell module 10 Solar cell assembly 20 Solar Cell 21 Semiconductor substrate 22 electrodes 231 First conductivity type cell electrode 232 Second conductivity type cell electrode 241 1st collector electrode 242 2nd collection electrode 30, 31, 35, 37 Wiring materials 32 Connection Tabs 33, 33a, 33b 34 Slit 351 1st wiring 352 2nd wiring 361 First connection part (connection part) 362 Second connection part (connection part) 40 Wiring sheet 41 Insulating substrate 42 Installation part D1 1st direction D2 2nd direction

Claims

1. A solar cell module in which a plurality of solar cells having electrodes on one surface of a semiconductor substrate are electrically connected by wiring members, The solar cell array includes a first direction and a second direction perpendicular to the first direction, and the solar cell array includes a second direction perpendicular to the first direction. The solar cell includes a first conductivity type cell electrode and a second conductivity type cell electrode as the electrodes, a first collector electrode connected to the first conductivity type cell electrode is provided on one side of the semiconductor substrate in the first direction, and a second collector electrode connected to the second conductivity type cell electrode is provided on the other side of the first direction; The wiring member is a strip-shaped connection portion that is long in the second direction and a plurality of tabs that extend from the connection portion in the first direction; the tabs are disposed in common to the solar cells arranged in the second direction and between the solar cells adjacent to each other in the first direction, and the tabs are each connected to the first collector electrode or the second collector electrode, a wiring member provided in common to the solar cell cells adjacent in the second direction connects the electrodes of the solar cell cells adjacent in the first direction to each other, thereby connecting the solar cell cells in series, and also connects the electrodes of the solar cell cells arranged in the second direction to each other, thereby connecting the solar cell cells in parallel, The solar cell module is characterized in that the wiring member has a slit at a portion of the connection portion arranged at a position spanning between the solar cell cells adjacent to each other in the second direction.

2. The solar cell module according to claim 1 , A solar cell module characterized in that the wiring member further has a plurality of slits in the connection portion, the slits being arranged at positions corresponding to the spaces between the tabs adjacent to each other in the second direction.

3. The solar cell module according to claim 1 or 2, The solar cell module is characterized in that the slit is opened long along the second direction.

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