JP2014127552A - Solar battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery capable of improving a characteristic.SOLUTION: One portion of an n-electrode 12 of each solar battery cell is electrically connected to a wiring 43 for the n-electrode by a conductive material in a second direction (Y-direction) crossing with a first direction (X-direction), and one portion of a p-electrode positioned between adjacent conductive materials in the second direction is isolated from the wiring 43 for the n-electrode by an isolation material. One portion of the p-electrode 11 of each solar battery is electrically connected to a wiring 45 for the p-electrode by the conductive material, and one portion of the n-electrode 12 positioned between adjacent conductive materials in the second direction is isolated from the wiring 45 for the p-electrode by the insulation material. The conductive material corresponding to the p-electrode 11 of one solar battery cell and the conductive material corresponding to the n-electrode 12 of the other solar battery cell, and the conductive material corresponding to the n-electrode 12 of one solar battery cell, and the conductive material corresponding to the p-electrode 11 of the other solar battery cell are respectively arranged on the same line in the second direction.

Description

  The present invention relates to a solar cell.

  In recent years, attention has been focused on power generation using solar energy as renewable energy. Heretofore, there is a so-called back electrode type solar battery cell having a p electrode and an n electrode on the back surface.

  For example, Patent Documents 1 to 3 disclose various conventional configurations in which a back electrode type solar cell and a wiring board are combined.

JP 2012-119458 A JP 2011-82431 A JP 2011-3854 A

  At present, further improvements in characteristics are required in a configuration in which a back electrode type solar cell and a wiring board are combined.

  Then, an object of this invention is to provide the solar cell which can improve a characteristic.

In order to achieve the above object, a solar cell according to one embodiment of the present invention is provided.
A first n-electrode and a first p-electrode extending in a first direction and alternately provided in a second direction intersecting the first direction on a back surface opposite to the light-receiving surface; Solar cells,
A second solar cell having a second n-electrode and a second p-electrode extending in the first direction and alternately provided in the second direction on the back surface opposite to the light-receiving surface;
A first p-electrode wiring and a first n-electrode wiring extending in the second direction and alternately provided in the first direction; and extending in the second direction and the first A wiring board having a second p-electrode wiring and a second n-electrode wiring provided alternately in the direction of
With
A portion of the first n-electrode is electrically connected to the first n-electrode wiring by a conductive material along the second direction, and between the conductive materials adjacent to each other in the second direction. A portion of the first p-electrode positioned is insulated from the first n-electrode wiring by an insulating material;
A portion of the first p-electrode is electrically connected to the first p-electrode wiring along the second direction by a conductive material, and between the conductive materials adjacent to each other in the second direction. A portion of the first n-electrode positioned is insulated from the first p-electrode wiring by an insulating material;
A portion of the second n-electrode is electrically connected to the second n-electrode wiring by a conductive material along the second direction, and between the conductive materials adjacent to each other in the second direction. A portion of the second p-electrode positioned is insulated from the second n-electrode wiring by an insulating material;
A portion of the second p-electrode is electrically connected to the second p-electrode wiring along the second direction by a conductive material, and between the conductive materials adjacent to the second direction. A portion of the second n-electrode positioned is insulated from the second p-electrode wiring by an insulating material;
Conductive material corresponding to the first p-electrode and conductive material corresponding to the second n-electrode, and conductive material corresponding to the first n-electrode and conductivity corresponding to the second p-electrode Each of the property materials is arranged on the same line in the second direction.

In the above configuration,
An insulating material having a first hole portion provided at an interval along the first n-electrode and the first p-electrode is provided between the first solar cell and the wiring substrate. ,
Provided along the other electrode between the two first holes adjacent along one electrode of the first n-electrode and the first p-electrode adjacent in the second direction. One of the first holes is disposed;
An insulating material having a second hole portion provided at an interval along the second n-electrode and the second p-electrode is provided between the second solar cell and the wiring substrate. ,
Provided along the other electrode between the two second holes adjacent along one electrode of the second n-electrode and the second p-electrode adjacent in the second direction. One second hole is disposed;
The conductive material may be provided in the first hole and the second hole.

Further, in any one of the above configurations, the first solar cell and the second solar cell are obtained by dividing one solar cell,
The second solar battery cell may have a configuration in which the second solar battery cell is rotated 180 ° with respect to a state obtained by dividing the one solar battery cell.

  For example, the one solar cell may have a substantially octagonal shape.

  In any of the above-described configurations, the first solar cell and the second solar cell are full cells, and the second solar cell rotates the first solar cell by 180 °. It may be in a state.

  In any of the above-described configurations, the insulating material may be an insulating resin that can be in the second cured state after being in the first cured state.

In order to achieve the above object, a solar cell according to another embodiment of the present invention is provided.
A first n-electrode and a first p-electrode extending in a second direction intersecting the first direction and provided alternately in the first direction on the back surface opposite to the light receiving surface Solar cells,
A second solar cell having a second n-electrode and a second p-electrode extending in the second direction and alternately provided in the first direction on the back surface opposite to the light-receiving surface;
A first p-electrode wiring and a first n-electrode wiring extending in the second direction and alternately provided in the first direction; and extending in the second direction and the first A wiring board having a second p-electrode wiring and a second n-electrode wiring provided alternately in the direction of
With
The first p-electrode wiring electrically connected to the first p-electrode and the second n-electrode wiring electrically connected to the second n-electrode are in the second direction. Placed on the same line,
The first n-electrode wiring electrically connected to the first n-electrode and the second p-electrode wiring electrically connected to the second p-electrode are arranged in the second direction. It is configured to be arranged on the same line and connected by wiring.

  Moreover, the said structure WHEREIN: A said 2nd photovoltaic cell is good also as a structure which is the state which rotated the said 1st photovoltaic cell which is a full cell 180 degree | times.

In the above configuration, the first solar cell and the second solar cell are obtained by dividing one solar cell,
The second solar battery cell may have a configuration in which the second solar battery cell is rotated 180 ° with respect to a state obtained by dividing the one solar battery cell.

  For example, the one solar cell may have a substantially octagonal shape.

  In any of the above-described configurations, the wiring pattern including the first n-electrode wiring, the first p-electrode wiring, the second n-electrode wiring, and the second p-electrode wiring is In the wiring extending linearly in the second direction and arranged in the first direction, unnecessary portions located between the first solar cells and the second solar cells are cut. It is good also as being.

  In any one of the configurations described above, the second solar battery cell may be arranged at a position shifted in the first direction with respect to the first solar battery cell.

  Further, the present invention is a solar battery characterized in that the first solar battery cell, the second solar battery cell, and the wiring substrate are sealed with a sealing material.

  Here, the term “solar battery” means a state in which the solar battery cell and the wiring board are joined (solar battery with a wiring board), and the solar battery cell with the wiring board in this state is sealed with a sealing material. (Solar cell module) also represents a concept.

  According to the solar cell of the present invention, the characteristics can be improved.

It is the figure which looked at the photovoltaic cell which concerns on 1st Embodiment of this invention from the light-receiving surface side. It is the figure which looked at the photovoltaic cell which provided the insulating resin which concerns on 1st Embodiment of this invention from the light-receiving surface side. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a figure which shows the photovoltaic cell after the division | segmentation which concerns on 1st Embodiment of this invention. It is the figure which looked at the wiring board concerning a 1st embodiment of the present invention from the surface side. It is the figure which looked at the photovoltaic cell with a wiring board which concerns on 1st Embodiment of this invention from the light-receiving surface side. It is the figure which looked at the wiring board used for 2nd Embodiment of this invention from the surface side. It is a figure which shows the state which joined the photovoltaic cell to the wiring board used for 2nd Embodiment of this invention. It is the figure which looked at the photovoltaic cell with a wiring board which concerns on 2nd Embodiment of this invention from the light-receiving surface side. It is the figure which looked at the photovoltaic cell which concerns on a prior art example from the light-receiving surface side. It is the figure which looked at the wiring board which concerns on a prior art example from the surface side. It is the figure which looked at the photovoltaic cell with a wiring board which concerns on a prior art example from the light-receiving surface side. It is the figure which looked at the photovoltaic cell which concerns on 3rd Embodiment of this invention from the light-receiving surface side. It is the figure which looked at the photovoltaic cell with a wiring board which concerns on 3rd Embodiment of this invention from the light-receiving surface side. It is a schematic perspective view of the solar cell module which concerns on one Embodiment of this invention.

<First Embodiment>
An embodiment of the present invention will be described below with reference to the drawings. The figure seen from the light-receiving surface side of the photovoltaic cell which concerns on 1st Embodiment of this invention is shown in FIG.

  A solar battery cell 1 shown in FIG. 1 has a substantially octagonal shape, and is provided with a plurality of strip-shaped p-electrodes 11 and n-electrodes 12 on the back surface side opposite to the light receiving surface. Cell. Here, the substantially octagonal shape is a shape that is cut from a circular shape with four sides leaving four corners.

  The p-electrode 11 and the n-electrode 12 extend in the X direction (first direction) and are alternately arranged in the Y direction (second direction) intersecting the X direction. Here, description will be made assuming that the X direction and the Y direction are orthogonal to each other. As described above, since the electrode is provided on the back surface opposite to the light receiving surface, the light incident loss due to the electrode on the light receiving surface does not occur.

  An insulating resin and a conductive material are provided on the back side of such a solar battery cell 1. The figure which looked at the photovoltaic cell 1 of the state which provided the insulating resin and the electroconductive material in the back surface side from the light-receiving surface side is shown in FIG. 2 is a cross-sectional view taken along the line AA in FIG. 2, and a cross-sectional view taken along the line BB in FIG.

  The solar cell 1 includes a substrate 14, an antireflection film 13 formed on the texture structure formed on the light receiving surface of the substrate 14, and a p electrode 11 and an n electrode 12 formed on the back surface of the substrate 14. Yes. As the substrate 14, for example, a silicon substrate made of polycrystalline silicon, single crystal silicon, or the like can be used.

  An insulating resin 2 (dam resin) is provided so as to cover the back side of the solar battery cell 1. Examples of the method for providing the insulating resin 2 include screen printing, dispenser coating, and inkjet coating. In particular, it is desirable to use screen printing that can provide the insulating resin 2 simply, at low cost, and in a short time.

  As the insulating resin 2, it is desirable to use a resin capable of being B-staged. B-stageable resin means that when an uncured resin in a liquid state is heated, the viscosity increases and then becomes a first cured state, then the viscosity decreases and softens, and then the viscosity increases again. Thus, the second cured state is obtained. The first cured state is called a B stage. The insulating resin 2 is provided on the back surface of the solar battery cell 1 in an uncured state, and then heated to form a B-stage (first cured state) sheet.

  The insulating resin 2 has a hole 21 provided at intervals along the p-electrode 11 and the n-electrode 12. One hole 21 provided along the other electrode is disposed between two holes 21 adjacent along one electrode of the p-electrode 11 and the n-electrode 12 adjacent in the Y direction. That is, the holes 21 are arranged in a staggered manner as a whole.

  After the insulating resin 2 is provided on the back surface of the solar battery cell 1, the conductive material 3 is applied to the hole 21, and the conductive material 3 is electrically connected to the p electrode 11 and the n electrode 12. As the conductive material 3, for example, solder or solder resin can be used.

  The solder resin is a state in which particles of solder material (solder particles) are dispersed in the insulating resin, and when heated, the insulating resin softens and the solder particles aggregate, and then the insulating resin hardens. Is. As the insulating resin used for the solder resin, it is preferable to use a thermosetting resin. When a resin capable of being B-staged is used as the insulating resin 2 to be described later, a crosslinking reaction is caused by heating to obtain a second cured state. It is preferable to heat cure.

  And in this embodiment, the photovoltaic cell 1 is divided | segmented by the dividing lines D1 and D2 extended in the X direction shown in FIG. The upper part of FIG. 4 shows the divided solar cells 1A above the dividing line D1 in the Y direction, and the lower part of FIG. 4 shows the result of rotating the divided photovoltaic cells 1B below the dividing line D2 in the Y direction by 180 °. Shown in

  With the solar cells 1A and 1B arranged adjacent to each other in the Y direction as shown in FIG. 4, the conductive material 3 corresponding to the p-electrode 11 of the solar cell 1A and the n-electrode 12 of the solar cell 1B The corresponding conductive material 3 is arranged on the same line in the Y direction. Similarly, the conductive material 3 corresponding to the n electrode 12 of the solar battery cell 1A and the conductive material 3 corresponding to the p electrode 11 of the solar battery cell 1B are arranged on the same line in the Y direction.

  In addition, although the photovoltaic cell 1 is made into the substantially octagonal shape, when dividing | segmenting the photovoltaic cell 1 with the dividing line D2, and rotating the photovoltaic cell 1B after a division | segmentation 180 degrees, it is in the position of two corners. This is because it is easy to understand that it has been rotated 180 °. If the rotation of 180 ° is easy to understand, the shape of the solar battery cell is not limited to a substantially octagonal shape, and a mark may be given to the solar battery cell.

  Next, the figure which looked at the wiring board for mounting photovoltaic cell 1A and 1B from the surface side is shown in FIG.

  The wiring board 4 shown in FIG. 5 includes an insulating base material 41 and a wiring pattern provided on the insulating base material 41. As the insulating base material 41, for example, a substrate made of a resin such as polyester, polyethylene naphthalate, or polyimide can be used. The wiring pattern is formed of, for example, copper foil or tin-plated aluminum foil.

  The wiring pattern includes a p-electrode wiring 42, an n-electrode wiring 43, a connection wiring 44, a p-electrode wiring 45, and an n-electrode wiring 46. The p-electrode wiring 42 and the n-electrode wiring 43 are formed in the arrangement area of the solar battery cell 1A, and the p-electrode wiring 45 and the n-electrode wiring 46 are formed in the arrangement area of the solar battery cell 1B.

  A plurality of p-electrode wirings 42 and n-electrode wirings 43 that are formed extend in the Y direction and are alternately arranged in the X direction. A plurality of p-electrode wirings 45 and n-electrode wirings 46 that extend are extended in the Y direction and are alternately arranged in the X direction. The n-electrode wiring 43 and the p-electrode wiring 45 are connected by a connection wiring 44 extending in the X direction.

  As described above, the conductive material 3 corresponding to the n-electrode 12 of the solar battery cell 1A and the conductive material 3 corresponding to the p-electrode 11 of the solar battery cell 1B are arranged on the same line in the Y direction. Also in the wiring substrate 4 on which the solar cells are placed, the n-electrode wiring 43 and the p-electrode wiring 45 are arranged on the same line in the Y direction.

  FIG. 6 shows a state in which the solar cells 1A and 1B in a state where the conductive material 3 is applied as described above are placed on and bonded to the wiring board 4 as described above. A solar cell with a wiring board is configured in the state shown in FIG. In FIG. 6, the portion hidden by the solar cells 1 </ b> A and 1 </ b> B in the wiring substrate 4 is also shown by a solid line for convenience (the same applies to the joined state diagrams other than FIG. 6).

  When a resin that can be made into a B-stage is used as the insulating resin 2, the insulating resin 2 is temporarily reduced in viscosity by heating the B-stage insulating resin 2, and then joined to the second cured state. Done. Since the second cured state is cured by a crosslinking reaction of the resin, the state of the insulating resin 2 in the second cured state is stabilized without being softened again.

  As shown in FIG. 6, the conductive materials 3 arranged at intervals along the p-electrode 11 of the solar cell 1 </ b> A are electrically connected to the p-electrode wiring 42 and spaced along the n-electrode 12. The conductive materials 3 arranged in this manner are electrically connected to the n-electrode wiring 43.

  Since a part of the n electrode 12 located between the conductive materials 3 adjacent to the Y direction corresponding to the p electrode 11 is covered with the insulating resin 2, the n electrode 12 and the p electrode wiring 42 are electrically connected. This prevents the n-electrode 12 and the p-electrode 11 from short-circuiting.

  Similarly, since a part of the p electrode 11 located between the conductive materials 3 adjacent to the Y direction corresponding to the n electrode 12 is covered with the insulating resin 2, the p electrode 11 and the n electrode wiring 43 are electrically connected. The p electrode 11 and the n electrode 12 are prevented from being short-circuited.

  In addition, as shown in FIG. 6, the conductive materials 3 arranged at intervals along the p electrode 11 of the solar battery cell 1 </ b> B are electrically connected to the p electrode wiring 45, and are spaced along the n electrode 12. The conductive materials 3 arranged with a gap are electrically connected to the n-electrode wiring 46.

  Since a part of the n electrode 12 positioned between the conductive materials 3 adjacent to the Y direction corresponding to the p electrode 11 is covered with the insulating resin 2, the n electrode 12 and the p electrode wiring 45 are electrically connected. This prevents the n-electrode 12 and the p-electrode 11 from short-circuiting.

  Similarly, a part of the p electrode 11 located between the conductive materials 3 adjacent to the Y direction corresponding to the n electrode 12 is covered with the insulating resin 2, so that the p electrode 11 and the n electrode wiring 46 are electrically connected. The p electrode 11 and the n electrode 12 are prevented from being short-circuited.

  The solar cells 1A and 1B are connected in series by such joining of the solar cells 1A and 1B and the wiring board 4.

  Next, in order to explain the effect of the present embodiment, a conventional solar cell with a wiring board according to a comparative example with the present embodiment will be described. The figure which looked at the photovoltaic cell which concerns on a prior art example from the light-receiving surface side is shown in FIG.

  A conventional solar battery cell 101 shown in FIG. 10 is a back electrode type solar battery cell provided with a strip-like p-electrode 1011 and an n-electrode 1012 on the back side. A plurality of formed p electrodes 1011 and n electrodes 1012 extend in the Y direction and are alternately arranged in the X direction.

  The figure which looked at the conventional wiring board for mounting two photovoltaic cells 101 from the surface side is shown in FIG. A conventional wiring substrate 102 shown in FIG. 11 includes an insulating base material 1021 and a wiring pattern formed on the insulating base material 1021.

  The wiring pattern includes a p-electrode wiring 1022 and an n-electrode wiring 1023 formed in an arrangement region where one of the two solar cells 101 to be placed is placed, and the other solar cell. A p-electrode wiring 1025 and an n-electrode wiring 1026 formed in an arrangement region where the cell 101 is placed, and a connection wiring 1024 for connecting the n-electrode wiring 1023 and the p-electrode wiring 1025 are included.

  FIG. 12 shows a state in which the two solar cells 101 are mounted on the wiring substrate 102 and joined together. In the joined state, the two solar cells 101 are connected in series.

  In the case of such a conventional example, with two solar cells 101 adjacent to each other in the Y direction, the p electrode 1011 of one solar cell 101 and the p electrode 1011 of the other solar cell 101 are in the Y direction. The n-electrode 1012 of one solar cell 101 and the n-electrode 1012 of the other solar cell 101 are arranged on the same line in the Y direction.

  Accordingly, the n electrode of one solar battery cell 101 and the p electrode of the other solar battery cell 101 are shifted in the X direction. Therefore, in the wiring substrate 102, the n electrode wiring 1023 and the p electrode wiring 1025 are provided. Are connected in a bent state by the connection wiring 1024 (see region P in FIG. 11).

  Due to such a bent wiring pattern, there is a problem that a crack is easily generated in the connection wiring 1024, and when the crack occurs, the current between the n-electrode wiring 1023 and the p-electrode wiring 1025 is interrupted.

  On the other hand, in the present embodiment, as shown in the region Q of FIG. 5, in the wiring substrate 4, the n-electrode wiring 43 and the p-electrode wiring 45 are arranged on the same line in the Y direction. Therefore, the connection wiring 44 is not easily cracked.

  Even if a crack occurs in the connection wiring 44 (for example, a broken line in the region Q), the n-electrode wiring 43 and the p-electrode wiring 45 are maintained in electrical connection, so that a current is passed between the solar cells. It can flow.

  Furthermore, according to the present embodiment, the pitch in the X direction of the hole 21 and the conductive material 3 can be designed large regardless of the electrode pitch of the solar battery cell 1. Therefore, the wiring width can be increased without substantially changing the pitch of the p-electrode wiring and the n-electrode wiring on the wiring board 4 side.

  Thereby, the precision of the joining technique of the photovoltaic cells 1A and 1B and the wiring board 4 can be reduced. Moreover, the electrical resistance of the wiring of the wiring board 4 can be reduced, and the output loss can be reduced. Furthermore, a technique for manufacturing the wiring board 4 with high definition becomes unnecessary.

  As described above, according to the present embodiment, the characteristics can be improved.

Second Embodiment
Next, a second embodiment according to the present invention will be described. FIG. 7 shows a view of the wiring board used in the present embodiment as viewed from the front side.

  The wiring substrate 5 shown in FIG. 7 has a configuration in which a plurality of wirings 51 formed linearly extending in the Y direction are arranged in the X direction on an insulating base material.

  And the photovoltaic cell 1A and 1B in 1st Embodiment are mounted in such a wiring board 5, and it joins. This joined state is shown in FIG. In the joined state, the conductive material 3 corresponding to the p-electrode 11 of the solar battery cell 1 </ b> A and the conductive material 3 corresponding to the n-electrode 12 of the solar battery cell 1 </ b> B are electrically connected to the same wiring 51. Further, the conductive material 3 corresponding to the n-electrode 12 of the solar battery cell 1 </ b> A and the conductive material 3 corresponding to the p-electrode 11 of the solar battery cell 1 </ b> B are electrically connected to the same wiring 51.

  Here, in order to insulate the conductive material 3 corresponding to the p electrode 11 of the solar battery cell 1A and the conductive material 3 corresponding to the n electrode 12 of the solar battery cell 1B, it is positioned between the solar cells 1A and 1B. The unnecessary portion 511 of the wiring 51 to be cut is cut. As a cutting method, for example, a laser method, a punching method, or the like can be employed.

  FIG. 9 shows a state after the unnecessary portion 511 of the wiring 51 is cut. In the state of FIG. 9, the solar cells 1A and 1B are connected in series.

  In the present embodiment, the portion of the wiring 51 on the side where the solar battery cell 1A is placed functions as the n-electrode wiring, and the portion on the side where the solar battery cell 1B is placed is the p-electrode wiring. Are connected by a connection wiring that is a part of the wiring 51. Since the n-electrode wiring and the p-electrode wiring are arranged on the same line in the Y direction and connected by the connection wiring, cracks are unlikely to occur in the connection wiring. Therefore, it can suppress that the electric current between the photovoltaic cells 1A and 1B is interrupted.

  Particularly in the present embodiment, the wiring pattern of the wiring board 5 can be simplified, and the wiring board 5 can be simplified. Further, as a wiring board on which linear wirings as shown in FIG. 7 are arranged, for example, an FFC (flexible flat cable) can be used, and the choices of the wiring board can be increased.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. The figure seen from the light-receiving surface side of the photovoltaic cell which concerns on 3rd Embodiment of this invention is shown in FIG.

  The solar cell 6 shown in the upper part of FIG. 13 is a full cell of a back electrode type solar cell provided with a p-electrode 61 and an n-electrode 62 extending in the Y direction and alternately arranged in the X direction on the back surface side. . The lower part of FIG. 13 is a state where the upper solar cell 6 is rotated by 180 °, and is adjacent to the upper solar cell 6 in the Y direction.

  FIG. 14 shows a state in which two solar cells 6 in the state shown in FIG. 13 are mounted on the wiring board 7 and joined together. The photovoltaic cell with a wiring board is comprised by the state shown in FIG.

  The wiring board 7 has a wiring pattern similar to that shown in FIG. 5 (first embodiment) on the insulating base 71. The p-electrode 61 of the solar cell 6 on the upper side of FIG. 14 is electrically connected in parallel with the p-electrode wiring 72 of the wiring substrate 7, and the n-electrode 62 is electrically connected in parallel with the n-electrode wiring 73. Is done. When joining the solar cell 6 to the wiring substrate 7, for example, an insulating resin is provided between the electrodes on the back side of the solar cell 6, and a conductive material is provided at a location corresponding to the electrode between the insulating resins. As the conductive material, for example, solder or solder resin can be used.

  In FIG. 14, the p-electrode 61 of the lower solar cell 6 is electrically connected in parallel with the p-electrode wiring 75 of the wiring substrate 7, and the n-electrode 62 is electrically connected in parallel with the n-electrode wiring 76. Is done.

  14 p electrode 61 of the upper solar cell 6 and n electrode 62 of the lower solar cell 6, and n electrode 62 of the upper solar cell 6 and p of the lower solar cell 6 in FIG. 14. The electrodes 61 are disposed on the same line in the Y direction.

  Therefore, as shown in a region R in FIG. 14, in the wiring substrate 7, the n-electrode wiring 73 and the p-electrode wiring 75 can be connected by the connection wiring 74 while being arranged on the same line in the Y direction. Therefore, cracks are unlikely to occur in the connection wiring 74. Even if a crack occurs in the connection wiring 74 (for example, a broken line in the region R), the n-electrode wiring 73 and the p-electrode wiring 75 are maintained in electrical connection. It can flow.

  In addition, in this embodiment, it is not restricted to arrange | positioning two full-cell solar cells, For example, after dividing a full cell in half and rotating one solar cell after division | segmentation 180 degree | times, Two solar cells may be arranged on the wiring board 7. At this time, for example, if it is a substantially octagonal shape in a full cell state, it is easy to confirm that it has been rotated 180 °.

  Further, for example, with respect to a wiring board on which a plurality of wirings formed to extend linearly in the Y direction as in the above-described FIG. 7 (second embodiment), the wiring board Two solar cells 6 with wiring and electrodes parallel may be placed adjacent to each other in the Y direction. In this state, the p electrode 61 of the upper solar cell 6 in the Y direction and the n electrode 62 of the lower solar cell 6, and the n electrode 62 of the upper solar cell 6 in the Y direction and the lower solar cell. 6 p-electrodes 61 are arranged on the same line in the Y direction. In this case, an unnecessary portion of the wiring located between the p-electrode 61 of the upper solar cell 6 in the Y direction and the n-electrode 62 of the lower solar cell 6 (between two solar cells) may be cut. .

  Further, for example, the solar cell 6 in a state where the upper solar cell 6 in FIG. 14 is shifted in the X direction may be arranged on the lower side.

<About solar cell module>
Next, the structure of the solar cell module provided with the solar cell with the wiring board described above will be described with reference to FIG.

  A solar cell module 150 according to this embodiment shown in FIG. 15 includes a solar cell 105 with a wiring substrate, a sealing material 115 that seals the solar cell 105 with a wiring substrate inside, and a light receiving surface of the sealing material 115. A transparent substrate 110 covering the side, a back sheet (back surface protection member) 120 covering the back surface side of the sealing material 115, and a terminal box 125 arranged on the surface of the back sheet 120 are provided.

  The sealing material 115 is formed using, for example, a resin transparent to sunlight, and may be formed of a resin such as ethylene vinyl acetate.

  The transparent substrate 110 is formed using, for example, a PC (polycarbonate resin) or a glass substrate that is transparent to sunlight. The back sheet 120 preferably has a three-layer structure including a moisture-proof layer such as PET / Al / PET (PET: polyethylene terephthalate).

  Output leads (not shown) are electrically connected to the output terminals (not shown) on the positive electrode side and the negative electrode side in the solar cell 105 with the wiring board, and the output leads are openings provided in the back sheet 120. Derived from a unit (not shown). The terminal box 125 has therein a terminal plate (not shown) to which one end of the output lead is electrically connected. A positive cable 126 and a negative cable 127, one end of which is electrically connected to the terminal plate, are led out from the terminal box 125 to the outside. Connectors 128 and 129 are provided at one ends of the positive side cable 126 and the negative side cable 127, respectively, and the connectors 128 and 129 are connected to connectors of other solar cell modules. As a result, the electric power extracted from the output lead is transmitted to the outside via the positive cable 126 and the negative cable 127.

<About modification>
Although one embodiment of the present invention has been described above, the embodiment can be variously modified within the scope of the gist of the present invention.

  For example, in the above-described embodiment, one solar cell is divided and the two divided solar cells are placed on the wiring board. However, two solar cells that are full cells are placed on the wiring board. It is good also as a structure. In this case, one solar battery cell may be placed with the other solar battery cell rotated by 180 °. At this time, it is desirable to make the shape of a full cell that makes it easy to understand that the solar battery cell has been rotated, or to give a mark to the full cell.

  Further, for example, when two solar cells are placed on the wiring board 4 as shown in FIG. 6, the solar cell 1B is shifted in the X direction with respect to the solar cell 1A without being rotated by 180 ° after the division. You may mount in a state. Thereby, the electroconductive material corresponding to n electrode of one photovoltaic cell and the electroconductive material corresponding to p electrode of the other photovoltaic cell can be arrange | positioned on the same line of a Y direction.

  Further, for example, in the above embodiment, the insulating resin is provided on the solar cell side and then bonded to the wiring board. However, the solar cell may be bonded after the insulating resin is provided on the wiring board side. .

DESCRIPTION OF SYMBOLS 1, 1A, 1B Solar cell 11 P electrode 12 N electrode 13 Antireflection film 14 Substrate 2 Insulating resin 21 Hole part 3 Conductive material 4 Wiring board 41 Insulating base material 42 P electrode wiring 43 N electrode wiring 44 Connection Wiring 45 p electrode wiring 46 n electrode wiring 5 wiring substrate 51 wiring 511 unnecessary portion 6 solar cell 61 p electrode 62 n electrode 7 wiring substrate 71 insulating substrate 72 p electrode wiring 73 n electrode wiring 74 connection wiring 75 p-electrode wiring 76 n-electrode wiring 105 solar cell with wiring substrate 110 transparent substrate 115 sealing material 120 back sheet 125 terminal box 126 positive side cable 127 negative side cable 128 connector 129 connector 150 solar cell module

Claims (5)

A first n-electrode and a first p-electrode extending in a first direction and alternately provided in a second direction intersecting the first direction on a back surface opposite to the light-receiving surface; Solar cells,
A second solar cell having a second n-electrode and a second p-electrode extending in the first direction and alternately provided in the second direction on the back surface opposite to the light-receiving surface;
A first p-electrode wiring and a first n-electrode wiring extending in the second direction and alternately provided in the first direction; and extending in the second direction and the first A wiring board having a second p-electrode wiring and a second n-electrode wiring provided alternately in the direction of
With
A portion of the first n-electrode is electrically connected to the first n-electrode wiring by a conductive material along the second direction, and between the conductive materials adjacent to each other in the second direction. A portion of the first p-electrode positioned is insulated from the first n-electrode wiring by an insulating material;
A portion of the first p-electrode is electrically connected to the first p-electrode wiring along the second direction by a conductive material, and between the conductive materials adjacent to each other in the second direction. A portion of the first n-electrode positioned is insulated from the first p-electrode wiring by an insulating material;
A portion of the second n-electrode is electrically connected to the second n-electrode wiring by a conductive material along the second direction, and between the conductive materials adjacent to each other in the second direction. A portion of the second p-electrode positioned is insulated from the second n-electrode wiring by an insulating material;
A portion of the second p-electrode is electrically connected to the second p-electrode wiring along the second direction by a conductive material, and between the conductive materials adjacent to the second direction. A portion of the second n-electrode positioned is insulated from the second p-electrode wiring by an insulating material;
Conductive material corresponding to the first p-electrode and conductive material corresponding to the second n-electrode, and conductive material corresponding to the first n-electrode and conductivity corresponding to the second p-electrode Each of the sex materials is disposed on the same line in the second direction.
A solar cell characterized by that. An insulating material having a first hole portion provided at an interval along the first n-electrode and the first p-electrode is provided between the first solar cell and the wiring substrate. ,
Provided along the other electrode between the two first holes adjacent along one electrode of the first n-electrode and the first p-electrode adjacent in the second direction. One of the first holes is disposed;
An insulating material having a second hole portion provided at an interval along the second n-electrode and the second p-electrode is provided between the second solar cell and the wiring substrate. ,
Provided along the other electrode between the two second holes adjacent along one electrode of the second n-electrode and the second p-electrode adjacent in the second direction. One second hole is disposed;
The solar cell according to claim 1, wherein the conductive material is provided in the first hole portion and the second hole portion. A first n-electrode and a first p-electrode extending in a second direction intersecting the first direction and provided alternately in the first direction on the back surface opposite to the light receiving surface Solar cells,
A second solar cell having a second n-electrode and a second p-electrode extending in the second direction and alternately provided in the first direction on the back surface opposite to the light-receiving surface;
A first p-electrode wiring and a first n-electrode wiring extending in the second direction and alternately provided in the first direction; and extending in the second direction and the first A wiring board having a second p-electrode wiring and a second n-electrode wiring provided alternately in the direction of
With
The first p-electrode wiring electrically connected to the first p-electrode and the second n-electrode wiring electrically connected to the second n-electrode are in the second direction. Placed on the same line,
The first n-electrode wiring electrically connected to the first n-electrode and the second p-electrode wiring electrically connected to the second p-electrode are arranged in the second direction. Arranged on the same line and connected by wiring,
A solar cell characterized by that.   The wiring pattern including the first n-electrode wiring, the first p-electrode wiring, the second n-electrode wiring, and the second p-electrode wiring is linear in the second direction. An unnecessary portion located between the first solar cell and the second solar cell is cut in the wiring extending in the first direction and arranged in the first direction. The solar cell according to any one of claims 1 to 3.   The said 2nd photovoltaic cell is arrange | positioned in the position shifted to the said 1st direction with respect to the said 1st photovoltaic cell, The any one of Claims 1-4 characterized by the above-mentioned. The solar cell as described in.

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