JP7330879B2 - solar module - Google Patents

Description

The present invention relates to solar cell modules.

A technique of arranging a solar cell module on a curved surface of a vehicle, a building, or the like is known (see Patent Documents 1 and 2, for example). Such a solar cell module has a plurality of solar cells arranged in a matrix along a curved surface.

JP 2016-178120 A JP 2015-211154 A

The inventors of the present application have devised a method of arranging a plurality of solar cells on a curved surface using a shingling method in a curved solar cell module.

INDUSTRIAL APPLICABILITY The present invention provides a solar cell module in which solar cells are arranged on a curved surface using the shingling method, in which displacement of the solar cells during manufacturing can be suppressed and resistance to external loads can be improved. intended to provide

A solar cell module according to the present invention includes a plurality of solar cells arranged in a curved shape in a first direction using a shingling method so that ends of adjacent solar cells overlap each other, and the plurality of solar cells In each of the solar cells, the end on the side in the first direction is defined as one end, the end on the side opposite to the first direction is defined as the other end, and one of the adjacent solar cells An arrangement in which the one end of one solar cell overlaps the other end of the other solar cell is defined as a first arrangement, and the one end of one of the adjacent solar cells is the first arrangement. Assuming that the array overlapping the other end portion of the other solar cell is the second array, the first array and the second array are switched at the extremal point on the curved surface as a boundary, and the extremal point Both ends of the one end and the other end of the photovoltaic cell positioned at .theta.

Advantageous Effects of Invention According to the present invention, in a solar cell module in which solar cells are arranged on a curved surface using the shingling method, it is possible to suppress positional deviation of the solar cells during manufacturing and improve resistance to external loads.

It is the figure which looked at the solar cell module which concerns on 1st Embodiment from the side. It is the figure which looked at the solar cell module which concerns on 2nd Embodiment from the side. It is the figure which looked at the solar cell module which concerns on 3rd Embodiment from the side. It is the figure which looked at the solar cell module which concerns on 4th Embodiment from the side.

An example of an embodiment of the present invention will be described below with reference to the accompanying drawings. In addition, suppose that the same code|symbol is attached|subjected to the same or a corresponding part in each drawing. Also, for convenience, hatching, member numbers, etc. may be omitted, but in such cases, other drawings shall be referred to.

(First embodiment)
FIG. 1 is a side view of the solar cell module according to the first embodiment. As shown in FIG. 1, the solar cell module 100 of the first embodiment is arranged on a curved surface such as a vehicle or building. A solar cell module 100 includes a plurality of solar cells 2 arranged along a curved surface. The arrangement of the solar cells 2 will be described later.

Photovoltaic cell 2 is sandwiched between light-receiving side protective member 3 and back side protective member 4 . A liquid or solid sealing material 5 is filled between the light-receiving side protective member 3 and the back side protective member 4 to seal the solar cells 2 .

The sealing material 5 seals and protects the photovoltaic cell 2 , and is between the light-receiving side surface of the photovoltaic cell 2 and the light-receiving-side protective member 3 and between the back surface of the photovoltaic cell 2 . It is interposed between the back side protection member 4 and the back side protection member 4 . The shape of the sealing material 5 is not particularly limited, and may be, for example, a sheet shape. This is because the sheet shape facilitates covering the front and back surfaces of the planar solar battery cell 2 .

The material of the sealing material 5 is not particularly limited, but preferably has a property of transmitting light (translucency). Moreover, it is preferable that the material of the encapsulant 5 has adhesiveness to bond the photovoltaic cell 2 , the light-receiving side protective member 3 , and the back side protective member 4 . Examples of such materials include ethylene/vinyl acetate copolymer (EVA), ethylene/α-olefin copolymer, ethylene/vinyl acetate/triallyl isocyanurate (EVAT), polyvinyl butyrate (PVB), acrylic Translucent resins such as resins, urethane resins, and silicone resins can be used.

The light-receiving-side protective member 3 covers the surface (light-receiving surface) of the solar cell 2 via the encapsulant 5 to protect the solar cell 2 . The shape of the light-receiving-side protective member 3 is not particularly limited, but a plate-like or sheet-like shape is preferable from the point of indirectly covering the planar light-receiving surface.

Although the material of the light-receiving side protective member 3 is not particularly limited, it is preferable to use a material that has translucency and is resistant to ultraviolet light, similar to the sealing material 5. For example, glass, or Transparent resins such as acrylic resins and polycarbonate resins can be used. Further, the surface of the light-receiving-side protective member 3 may be processed into an uneven shape, or may be coated with an antireflection coating layer. This is because the light-receiving-side protective member 3 having such a configuration makes it difficult to reflect the received light, and guides more light to the solar battery cell 2 .

The back side protection member 4 covers the back side of the solar cell 2 via the encapsulant 5 to protect the solar cell 2 . The shape of the back side protective member 4 is not particularly limited, but like the light-receiving side protective member 3, it is preferably plate-like or sheet-like in that it indirectly covers the planar back side.

Although the material for the back side protection member 4 is not particularly limited, a material that prevents the infiltration of water or the like (highly impervious to water) is preferable. For example, a resin film such as polyethylene terephthalate (PET), polyethylene (PE), olefin-based resin, fluorine-containing resin, or silicone-containing resin, or a translucent plate-shaped resin member such as glass, polycarbonate, or acrylic, A laminate with a metal foil such as an aluminum foil may be mentioned.

Below, arrangement|positioning of the photovoltaic cell 2 is demonstrated. The solar cells 2 are curved in the X direction (first direction) so that the ends of the adjacent solar cells 2 overlap each other. Specifically, of the adjacent solar cells 2, 2, a portion of the end of one solar cell 2 and a portion of the end of the other solar cell 2 overlap.

In this way, a plurality of solar cells 2 are deposited uniformly in a certain direction and tilted like a tiled roof. This method is called the shingling method. A plurality of solar cells 2 connected in a string is called a solar cell string (solar cell device).

The solar cell 2 is, for example, a back electrode type (also referred to as back contact type or back contact type) solar cell. Adjacent solar cells 2, 2 are electrically connected by a known technique.

Here, in the photovoltaic cell 2, the end on the X direction (first direction) side is defined as one end, and the end on the side opposite to the X direction is defined as the other end. Moreover, the arrangement|sequence which the one end part of one solar battery cell 2 overlaps on the other end part of the other solar battery cell 2 among the adjacent solar battery cells 2 and 2 is made into 1st arrangement|sequence A1. Moreover, the arrangement|sequence which the one end part of one solar battery cell 2 overlaps under the other end part of the other solar battery cell 2 among the adjacent solar battery cells 2 and 2 is made into 2nd arrangement|sequence A2.

In the curved surface, a local extremum point on the Y direction (second direction) side that intersects the X direction (first direction) is a local maximum point Pmax, which is opposite to the Y direction. Let the local minimum point Pmin be the extreme point convex in the direction.

Then, in the arrangement of the solar cells 2, the first arrangement A1 and the second arrangement A2 are switched at the boundary of the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin on the curved surface. Both ends of the one end and the other end of the solar cell 2 positioned at the maximum point (extreme value point) Pmax overlap the ends of the adjacent solar cells 2 . Both ends of the one end and the other end of the solar cell 2 located at the minimum point (extreme value point) Pmin overlap under the ends of the adjacent solar cells 2 .

Here, on the curved surface, the curved surface side of the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin is defined as the inner side Rin, and the side opposite to the inner side Rin is defined as the outer side Rout. Then, both ends of the one end and the other end of the solar cell 2 located at the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin are located more than the end portion of the adjacent solar cell 2. Located on the Outer Route.

According to the solar cell module 100 of the first embodiment, with the solar cell 2 positioned at the maximum point (extreme value point) Pmax and the solar cell 2 positioned at the minimum point (extreme value point) Pmin as fulcrums, By arranging a plurality of photovoltaic cells 2, positional deviation of the photovoltaic cells 2 during manufacturing can be suppressed.

Further, according to the solar cell module 100 of the first embodiment, the solar cell 2 located at the maximum point (extreme value point) Pmax serves as a receiver for the load L2 from the outside, and is located at the minimum point (extreme value point) Pmin. The photovoltaic cell 2 which does so serves as a receptacle for the load L1 from the outside. As a result, resistance to external loads L1 and L2 can be improved. Therefore, the reliability of the solar cell module 100 can be improved.

Further, according to the solar cell module 100 of the first embodiment, the plurality of solar cells 2 are arranged using the shingling method so that the ends of the solar cells 2 partially overlap. As a result, more solar cells 2 can be mounted in the limited solar cell mounting area of the solar cell module 100, and the filling rate of the solar cells is improved. As a result, the light receiving area for photoelectric conversion is increased, and the output of the curved solar cell module 100 can be improved.

This output improvement effect is great in applications such as vehicles where the mounting area of the solar cell module is limited.

Moreover, in the shingling method, there is no gap between the solar cells 2, and the design of the curved solar cell module 100 can be improved.

In the back-contact type solar cell, the electrodes and wiring are invisible and the design is high. The unevenness of the gap is conspicuous. The solar cell module 100 of the present embodiment has a large effect of improving the design in the curved solar cell module 100 including the back-contact type solar cells 2 .

(Second embodiment)
FIG. 2 is a side view of the solar cell module according to the second embodiment. The solar cell module 100 of the second embodiment shown in FIG. 2 differs from the solar cell module 100 of the first embodiment shown in FIG. 1 in the arrangement of the solar cells 2 .

In the arrangement of the photovoltaic cells 2 of the second embodiment as well, the first arrangement A1 and the second arrangement A2 are switched at the boundary of the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin on the curved surface. there is In the arrangement of the solar cells 2 of the second embodiment, both ends of the one end and the other end of the solar cell 2 located at the local maximum point (extremum point) Pmax are the same as those of the adjacent solar cell 2. overlapped under the edge. Both ends of the one end and the other end of the solar cell 2 positioned at the minimum point (extreme value point) Pmin overlap the ends of the adjacent solar cells 2 .

In addition, in the arrangement of the solar cells 2 of the second embodiment, both ends of the one end and the other end of the solar cells 2 located at the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin is positioned inside Rin from the edge of the adjacent solar battery cell 2 .

Also in the solar cell module 100 of the second embodiment, a plurality of By arranging the photovoltaic cells 2, positional deviation of the photovoltaic cells 2 during manufacturing can be suppressed.

The solar cell 2 positioned at the maximum point (extreme value point) Pmax receives the load L1 from the outside, and the solar battery cell 2 positioned at the minimum point (extreme value point) Pmin receives the load L2 from the outside. becomes. As a result, resistance to external loads L1 and L2 can be improved. Therefore, the reliability of the solar cell module 100 can be improved.

In addition, the solar cell module 100 of the second embodiment also has advantages similar to those of the solar cell module 100 of the first embodiment.

(Third embodiment)
FIG. 3 is a side view of the solar cell module according to the third embodiment. The solar cell module 100 of the third embodiment shown in FIG. 3 differs from the solar cell module 100 of the first embodiment shown in FIG. 1 in the arrangement of the solar cells 2 .

Also in the arrangement of the solar cells 2 of the third embodiment, the first arrangement A1 and the second arrangement A2 are switched at the boundary of the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin on the curved surface. there is Furthermore, in the third embodiment, the first array A1 and the second array A2 are switched even at an intermediate point between the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin.

In addition, in the arrangement of the solar cells 2 of the third embodiment, both ends of the one end and the other end of the solar cell 2 located at the local maximum point (extreme value point) Pmax overlaid on the edge. Both ends of the one end and the other end of the solar cell 2 located at the local minimum point (extreme value point) Pmin also overlap the ends of the adjacent solar cells 2 .

In other words, in the arrangement of the photovoltaic cells 2 of the third embodiment, both ends of the one end and the other end of the photovoltaic cell 2 positioned at the local maximum point (extremum point) Pmax 2 outside the Rout. On the other hand, both ends of the one end and the other end of the solar cell 2 located at the minimum point (extreme value point) Pmin are located inside Rin from the end of the adjacent solar cell 2 .

In the solar cell module 100 of the third embodiment as well, the solar cell 2 located at the maximum point (extreme value point) Pmax and the solar cell 2 located at the minimum point (extreme value point) Pmin are used as fulcrums, and a plurality of By arranging the photovoltaic cells 2, positional deviation of the photovoltaic cells 2 during manufacturing can be suppressed.

In addition, the solar cell 2 positioned at the maximum point (extreme value point) Pmax receives the load L2 from the outside, and the solar battery cell 2 positioned at the minimum point (extreme value point) Pmin also receives the load L2 from the outside. becomes. Thereby, in the third embodiment, it is possible to further improve resistance to the load L2 from the outside in a specific direction. Therefore, the reliability of the solar cell module 100 can be improved.

In addition, the solar cell module 100 of the third embodiment also has advantages similar to those of the solar cell module 100 of the first embodiment.

(Fourth embodiment)
FIG. 4 is a side view of a solar cell module according to a fourth embodiment. The solar cell module 100 of the fourth embodiment shown in FIG. 4 differs from the solar cell module 100 of the first embodiment shown in FIG. 1 in the arrangement of the solar cells 2 .

In the arrangement of the photovoltaic cells 2 of the fourth embodiment as well, the first arrangement A1 and the second arrangement A2 are switched at the boundary of the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin on the curved surface. there is Furthermore, in the fourth embodiment, the first array A1 and the second array A2 are switched even at an intermediate point between the maximum point (extreme value point) Pmax and the minimum point (extreme value point) Pmin.

In addition, in the arrangement of the solar cells 2 of the fourth embodiment, both ends of the one end and the other end of the solar cell 2 located at the local maximum point (extreme value point) Pmax overlapped under the edge. Both ends of the one end and the other end of the solar cell 2 located at the minimum point (extreme value point) Pmin also overlap under the end of the adjacent solar cell 2 .

In other words, in the arrangement of the solar cells 2 of the fourth embodiment, both ends of the one end and the other end of the solar cell 2 located at the local maximum point (extremum point) Pmax 2, located inside Rin. On the other hand, both ends of the one end and the other end of the solar cell 2 located at the minimum point (extreme value point) Pmin are located outside Rout from the end of the adjacent solar cell 2 .

In the solar cell module 100 of the fourth embodiment as well, the solar cell 2 located at the maximum point (extreme value point) Pmax and the solar cell 2 located at the minimum point (extreme value point) Pmin are used as fulcrums, and a plurality of By arranging the photovoltaic cells 2, positional deviation of the photovoltaic cells 2 during manufacturing can be suppressed.

In addition, the solar cell 2 positioned at the maximum point (extreme value point) Pmax receives the load L1 from the outside, and the solar battery cell 2 positioned at the minimum point (extreme value point) Pmin also receives the load L1 from the outside. becomes. Thereby, in the fourth embodiment, it is possible to further improve resistance to the load L1 from the outside in a specific direction. Therefore, the reliability of the solar cell module 100 can be improved.

In addition, the solar cell module 100 of the fourth embodiment also has advantages similar to those of the solar cell module 100 of the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various changes and modifications are possible. For example, in the embodiment described above, the solar cell module 100 including the back electrode type (back contact type) solar cell 2 is illustrated. However, the features of the present invention are not limited to this, and can be applied to, for example, a solar cell module including double-sided electrode type solar cells.

Further, in the above-described embodiment, the solar cell module 100 including the solar cells 2 arranged in a curved surface having a maximum point Pmax and a minimum point Pmin, ie, a plurality of extreme points, is illustrated. However, the features of the present invention are not limited to this, and can be applied, for example, to a solar cell module comprising solar cells arranged in a curved surface having a maximum point or a minimum point, that is, one extreme point.

2 Solar cell 3 Light-receiving side protective member 4 Back side protective member 5 Sealing material 100 Solar cell module A1 First array A2 Second array Pmax Local maximum point (extreme point)
Pmin Local minimum point (extreme value point)
Rin Inside extreme point Rout Outside extreme point L1, L2 External load

Claims (10)

A plurality of solar cells arranged in a curved shape in a first direction using a shingling method so that the ends of adjacent solar cells overlap,
In each of the plurality of solar cells, the end on the first direction side is one end, and the end on the side opposite to the first direction is the other end,
a first arrangement in which the one end of one of the adjacent solar cells overlaps the other end of the other solar cell;
If the arrangement in which the one end of one of the adjacent solar cells overlaps under the other end of the other solar cell is defined as a second arrangement,
The first array and the second array are exchanged at the extremal point on the curved surface,
Both ends of the one end and the other end of the solar cell positioned at the extremum point overlap with the ends of the adjacent solar cells or under the ends of the adjacent solar cells. Overlap,
solar module. In the curved surface, if the curved surface side of the extremal point is the inner side, and the opposite side to the inner side is the outer side,
Both ends of the one end and the other end of the solar cell positioned at the extreme point are positioned outside the ends of adjacent solar cells,
The solar cell module according to claim 1. In the curved surface, the extremal point convex in the second direction crossing the first direction is the maximum point, and the extremal point convex in the opposite direction to the second direction is the minimum point. Then,
Both ends of the one end and the other end of the solar cell positioned at the local maximum overlap the ends of adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point overlap under the ends of adjacent solar cells,
The solar cell module according to claim 2. In the curved surface, if the curved surface side of the extremal point is the inner side, and the opposite side to the inner side is the outer side,
Both ends of the one end and the other end of the solar cell positioned at the extreme point are positioned inside the ends of adjacent solar cells,
The solar cell module according to claim 1. In the curved surface, the extremal point convex in the second direction crossing the first direction is the maximum point, and the extremal point convex in the opposite direction to the second direction is the minimum point. Then,
Both ends of the one end and the other end of the solar cell positioned at the local maximum overlap under the ends of adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point overlap the ends of the adjacent solar cells,
The solar cell module according to claim 4. In the curved surface shape, the curved surface side of the extremum point is the inner side, the side opposite to the inner side is the outer side, and the extremum point of the convex shape is the local maximum point on the side of the second direction that intersects the first direction. Assuming that the extremum point convex in the opposite direction to the second direction is the local minimum point,
Both ends of the one end and the other end of the solar cell positioned at the local maximum point are positioned outside the ends of adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point are positioned inside the ends of adjacent solar cells,
The solar cell module according to claim 1. Both ends of the one end and the other end of the solar cell positioned at the local maximum overlap the ends of adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point overlap the ends of the adjacent solar cells,
The solar cell module according to claim 6. In the curved surface shape, the curved surface side of the extremum point is the inner side, the side opposite to the inner side is the outer side, and the extremum point of the convex shape is the local maximum point on the side of the second direction that intersects the first direction. Assuming that the extremum point convex in the opposite direction to the second direction is the local minimum point,
Both ends of the one end and the other end of the solar cell positioned at the local maximum point are positioned inside the ends of the adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point are positioned outside the ends of adjacent solar cells,
The solar cell module according to claim 1. Both ends of the one end and the other end of the solar cell positioned at the local maximum overlap under the ends of adjacent solar cells,
Both ends of the one end and the other end of the solar cell positioned at the minimum point overlap under the ends of adjacent solar cells,
The solar cell module according to claim 8. The solar cell module according to any one of claims 1 to 9, wherein the plurality of solar cells are back contact type solar cells.

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