CN211654846U - Photovoltaic module and local concentrating photovoltaic glass used for same - Google Patents

Abstract

The utility model discloses a photovoltaic module and local photovoltaic spotlight glass who is used for it, photovoltaic module includes: the solar cell comprises a plurality of cell pieces, a plurality of welding strips and a plurality of power generating units, wherein one side of each cell piece is formed into a light-facing surface, the other side of each cell piece is formed into a backlight surface, at least one of the light-facing surface and the backlight surface is provided with a plurality of welding strips arranged at intervals, and an area between two adjacent welding strips or an area between the welding strips and the edge of the cell piece is formed into an effective power generating area; the front photovoltaic glass is arranged on the light-facing surface; the back photovoltaic glass is arranged on the backlight surface, one side of the photovoltaic glass facing the cell slice is formed into a light emitting surface, and one side of the photovoltaic glass facing away from the cell slice is formed into a light inlet surface; the first refraction portion is arranged on a light inlet surface of the photovoltaic glass and located above the solder strip, light above the solder strip is refracted to the battery piece through the first refraction portion to form a light spot, and the light spot is located in an effective power generation area. The utility model discloses photovoltaic module can make the structure of light path change and finally squint to effective electricity generation region to improve light utilization ratio.

Description

Photovoltaic module and local concentrating photovoltaic glass used for same

Technical Field

The utility model belongs to the technical field of photovoltaic module, especially, relate to a photovoltaic module and local spotlight photovoltaic glass who is used for it.

Background

At present, in the production process of a photovoltaic solar cell module, a plurality of single-chip cells are generally connected by welding strip series welding, but most of solar rays irradiated on a welding strip area of the module cannot be absorbed by the cells due to the connection mode, so that the utilization rate of the rays is reduced.

In order to reduce the shielding of the welding strip on the light receiving area of the cell, the width of the welding strip selected in the prior art is narrow, which leads to the low welding tension of the cell and increases the loss of the cell in the assembly, therefore, the existing local light-gathering glass for the photovoltaic assembly needs to be improved, and the light utilization rate of the photovoltaic assembly is improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

In view of this, the utility model provides a photovoltaic module, this photovoltaic module can improve light utilization ratio for the structure of light path changes and finally squints to the effective power generation area of battery piece, improves photovoltaic module's light utilization ratio.

The utility model discloses still provide a photovoltaic glass, this photovoltaic glass structure is ingenious, can effective deflection light, makes light skew to effective electricity generation region, improves photoelectric conversion efficiency.

According to the utility model discloses photovoltaic module of first aspect embodiment includes: the solar cell comprises a plurality of cell pieces, wherein one side of each cell piece is formed into a light-facing surface, the other side of each cell piece is formed into a backlight surface, at least one of the light-facing surface and the backlight surface is provided with a plurality of welding strips which are arranged at intervals, and an area between two adjacent welding strips or an area between the welding strips and the edge of the cell piece is formed into an effective power generation area; the front photovoltaic glass is arranged on the light-facing surface; the back photovoltaic glass is arranged on the backlight surface, one sides of the front photovoltaic glass and the back photovoltaic glass facing the cell piece form light emitting surfaces, and one sides of the front photovoltaic glass and the back photovoltaic glass facing away from the cell piece form light inlet surfaces; first portion of refracting, first portion of refracting are located front photovoltaic glass with back photovoltaic glass's at least one on the light inlet surface, first portion of refracting is located the solder strip top, the light process of solder strip top first portion of refracting extremely form the facula on the battery piece, the facula is located effective power generation area.

According to the utility model discloses photovoltaic module, through be equipped with at least one first light portion of refracting on front photovoltaic glass and back photovoltaic glass, make the sunlight shine first light portion of refracting structural, the light of shining is via the refraction of first light portion of refracting for the transmission route of light takes place the deflection and finally squints to the battery piece effective power generation area, reduces the light of loss on the solder strip, thereby improves photovoltaic module's light utilization ratio, with this photoelectric conversion efficiency who improves photovoltaic module.

According to the utility model discloses photovoltaic module can also have following additional technical characterstic:

according to the utility model discloses an embodiment, the battery piece is the single face battery piece, be equipped with on the positive plain noodles solder strip, positive photovoltaic glass advance to be equipped with on the plain noodles first portion of folding light.

According to the utility model discloses an embodiment, the battery piece is two-sided battery piece, the positive plain noodles with be equipped with on the backlight face respectively the solder strip, positive photovoltaic glass with back photovoltaic glass be equipped with on the light-in face respectively first portion of refracting.

According to the utility model discloses an embodiment, first refraction portion is established directly over the solder strip, first refraction portion includes at least one refraction unit, every the refraction unit includes a plurality of edges respectively the lens that the solder strip direction equidistant set up, refraction unit dorsad one side on the light inlet surface is equipped with the cockscomb structure recess, and light passes through the recess deflection forms the facula.

According to the utility model discloses an embodiment, first light portion of folding is equipped with: at least one refracting surface, the refracting surface is arranged obliquely relative to the light inlet surface.

According to the utility model discloses an embodiment, the solder strip with first refraction portion forms into rectangular shape respectively, the quantity of refraction face is a plurality of, and is a plurality of the refraction face is followed the central line symmetric distribution in the cross-section of solder strip.

According to an embodiment of the present invention, the number of the battery pieces is plural, two adjacent battery pieces are connected or spaced apart, the battery piece is provided with a battery piece edge insulation region, the battery piece edge insulation region includes battery piece edge insulation units respectively corresponding to the plurality of battery pieces one by one, and at least a part of the battery piece edge insulation unit corresponding to one battery piece is disposed at an edge of one battery piece adjacent to a position where another battery piece is located; the photovoltaic module further comprises a second light folding part, and the second light folding part is located above the battery piece edge insulation area so that light rays above the battery piece edge insulation area are refracted to the battery piece.

According to the utility model discloses local spotlight photovoltaic glass of second aspect embodiment, one side of photovoltaic glass forms to going out the plain noodles, one side of photovoltaic glass battery piece is formed into the light inlet face dorsad, at least one of photovoltaic glass be equipped with first portion of folding light on the light inlet face, first portion of folding light is located photovoltaic module's solder strip so that directly over the light refraction of solder strip top extremely form the facula on the battery piece.

According to the utility model discloses an embodiment, first refraction portion includes at least one refraction unit, every refraction unit includes a plurality of edges respectively the lens that weld the equidistant setting of area direction, light passes through lens deflection forms the facula.

According to the utility model discloses an embodiment, first light portion of folding is equipped with: and the refraction surface and the light inlet surface are obliquely arranged.

According to the utility model discloses an embodiment, adjacent two be equipped with battery piece edge insulation district between the battery piece, photovoltaic module still includes: and the second light folding part is positioned above the edge insulation area of the battery piece so as to enable light above the edge insulation area of the battery piece to be refracted to the battery piece.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a photovoltaic module according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of line a-a of a photovoltaic module according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of line a-a of a photovoltaic module according to yet another embodiment of the present invention;

fig. 4 is a schematic view of light deflection of a photovoltaic module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.

Reference numerals:

a photovoltaic module 100;

a battery piece 10;

a photovoltaic glass 20; front side photovoltaic glass 21; a back photovoltaic glass 22;

a first light folding part 30; a refracting surface 31;

a second refraction portion 40;

a solder strip 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The photovoltaic module 100 according to an embodiment of the present invention is first described in detail.

As shown in fig. 1 to 5: according to the utility model discloses photovoltaic module 100, include: the photovoltaic module comprises a battery piece 10, a front photovoltaic glass 21, a back photovoltaic glass 22 and a first light folding part 30.

Specifically, one side of each cell 10 is formed as a light front surface, the other side is formed as a light back surface, at least one of the light front surface and the light back surface is provided with a plurality of solder strips 50 arranged at intervals, an area between two adjacent solder strips 50 or an area between the solder strips 50 and the edge of the cell 10 is formed as an effective power generation area, the front photovoltaic glass 21 is arranged on the light front surface, the back photovoltaic glass 22 is arranged on the light back surface, one sides of the front photovoltaic glass 21 and the back photovoltaic glass 22 facing the cell 10 are formed as light emitting surfaces, one sides of the front photovoltaic glass 21 and the back photovoltaic glass 22 facing away from the cell 10 are formed as light inlet surfaces, the first light folding part 30 is arranged on the light inlet surface of at least one of the front photovoltaic glass 21 and the back photovoltaic glass 22, the first light folding part 30 is positioned above the solder strips 50, light above the solder strips 50 is refracted through the first light, the light spot is located in an effective power generation area.

In other words, the photovoltaic module 100 according to the embodiment of the present invention mainly comprises the battery pieces 10, the front photovoltaic glass 21, the back photovoltaic glass 22 and the first light folding portion 30, wherein each group of battery pieces 10 is provided with two sides, one side is a front side, and the other side is a back side, the battery pieces 10 are welded and connected on the front light surface and the back light surface through the welding strips 50 to form an effective power generation area, the front photovoltaic glass 21 is arranged on the front light surface, the back photovoltaic glass 21 is arranged on the back light surface, on the front photovoltaic glass 21 and the back photovoltaic glass 21, the surface of the battery sheet opposite to the battery sheet is a light inlet surface, a first light folding part 30 is arranged on the light inlet surface, the first light folding parts 30 correspond to the solder strips 50 one by one and are located above the solder strips 50, so that light rays above the solder strips 50 are refracted to the battery piece 10 through the first light folding parts 30 to form light spots, and the formed light spots are located in an effective power generation area.

As shown in fig. 2 and fig. 3, according to the utility model discloses a photovoltaic module 100 goes up the photovoltaic module (fig. 3) that both can set to single face photovoltaic glass 20 structure, also can two-sidedly all set up photovoltaic glass 20 and assemble photovoltaic module 100 (fig. 2), but no matter make single face setting or two-sided setting, according to the utility model discloses all set up first light bending portion 30 in the top position of solder strip 50 on the photovoltaic module 100, the purpose makes through carrying out the deflection to the light of inciding above the solder strip, makes originally inciding to the light in the solder strip region in the deflection to effective power generation region in, thereby improve photovoltaic module 100's light utilization ratio, meanwhile, can also make the exposure degree in the effective light receiving area of battery piece 10 more even, can not take place the local light intensity of battery piece 10 surface and produce the electric current reality and join in marriage the problem excessively.

Therefore, according to the utility model discloses photovoltaic module 100, through be equipped with at least one first light portion 30 of refracting on front photovoltaic glass 21 and back photovoltaic glass 22, make the sunlight shine first light portion 30 structural, the light of shining is via the refraction of first light portion 30 of refracting for the transmission route of light takes place the deflection and finally squints to the effective power generation area of battery piece 10, reduce the light of loss on solder strip 50, thereby improve photovoltaic module 100's light utilization ratio, improve photovoltaic module 100's photoelectric conversion efficiency with this.

According to the utility model discloses an embodiment, battery piece 10 is the single face battery piece, is equipped with solder strip 50 on the positive plain noodles, is equipped with first portion of folding 30 on the light inlet surface of positive photovoltaic glass 21 to can realize that photovoltaic module 100 single face received light and regulate and control the direction of propagation of light.

Optionally, the battery piece 10 is a double-sided battery piece, the front surface and the back surface are respectively provided with the solder strips 50, and the light inlet surfaces of the front photovoltaic glass 21 and the back photovoltaic glass 22 are respectively provided with the first light folding portion 30, so that the photovoltaic module 100 can receive light on both sides, and the propagation directions of the light on both sides can be respectively regulated and controlled.

That is, the photovoltaic glass 20 can be designed to be a single-sided structure or a double-sided structure, and the structure is designed to process the photovoltaic glass 20 to meet the actual requirements of the photovoltaic module 100 according to the actual requirements, i.e. the requirements of single-sided light receiving or double-sided light receiving, in the actual using process.

Preferably, the first refraction portion 30 is arranged right above the solder strip 50, the first refraction portion 30 comprises at least one refraction unit, each refraction unit comprises a plurality of lenses arranged at equal intervals along the direction of the solder strip, one side of each refraction unit, which faces away from the light inlet surface, is provided with a sawtooth-shaped groove, and light rays are deflected through the grooves to form light spots. The lenses can be saw-toothed groove lenses arranged at equal intervals, so that light rays incident to the light inlet surface are deflected and scattered, the light rays above the solder strip 50 are deflected to an effective power generation area after being incident to the light inlet surface, and the photoelectric conversion efficiency of the photovoltaic module 100 is improved.

Further, the first refraction portion 30 is provided with at least one refraction surface 31, and the refraction surface 31 is arranged obliquely with respect to the light entering surface. The plurality of refraction surfaces 31 arranged obliquely can deflect the incident light to the effective power generation region.

Alternatively, the solder strip 50 and the first light-folding portion 30 are respectively formed in a strip shape, the number of the refraction surfaces 31 is plural, and the plural refraction surfaces 31 are symmetrically distributed along the center line of the cross section of the solder strip.

That is to say, the first light-folding portion 30 is provided with the plurality of refraction surfaces 31, and the refraction surfaces 31 are symmetrically distributed in the projection area of the solder strip 50 along the center line of the solder strip 50, so that in the scheme, when the refraction surfaces 31 are arranged in actual use, light rays are symmetrically deflected along the center line of the cross section of the solder strip, so that the deflected light rays effectively avoid the solder strip area, and meanwhile, the solder strip 50 and the first light-folding portion 30 are both arranged in a long strip shape, thereby meeting the requirement of actual production.

According to an embodiment of the present invention, the number of the battery pieces 10 is plural, two adjacent battery pieces 10 are connected or spaced apart, the battery pieces 10 are provided with battery piece edge insulation regions, each battery piece edge insulation region includes battery piece edge insulation units corresponding to the plurality of battery pieces 10 one by one, and at least a portion of the battery piece edge insulation unit corresponding to one battery piece 10 is disposed at an edge of a battery piece 10 adjacent to a position where another battery piece 10 is located; the photovoltaic module further comprises a second light folding part 40, wherein the second light folding part 40 is located above the edge insulation area of the battery piece so as to enable light rays above the edge insulation area of the battery piece to be refracted to the battery piece 10.

That is, the cell edge insulating regions are disposed around the cell 10 to insulate the cell, and in order to avoid shunting, photoelectric conversion cannot be performed, so that the cell 10 may be disposed at a distance from each other or may be disposed in series during actual use and assembly, in order to facilitate assembly of the cell and avoid shunting of the cell, and the second light folding portion 40 is located above the cell 10 edge insulating regions to refract light above the cell 10 edge insulating regions onto the cell 10.

The height of the first light folding part and the height of the second light folding part are 0.1mm-0.25mm, the width of the first light folding part 30 is +1mm of the width of the main grid of the battery, and the width of the second light folding part is +1.5mm of the row-to-row spacing distance of the photovoltaic module 100.

That is to say, an edge insulation area is provided between two battery pieces 10, that is, when the photovoltaic module 100 is actually used and assembled, an insulation area needs to be provided between the battery pieces 10 to facilitate the assembly of the photovoltaic module 100, since the battery pieces 10 are not provided in the edge insulation area, in the actual use process, when light is incident or deflected to the edge insulation area, the area cannot effectively convert the light energy into electric energy, the second light-folding portion 40 needs to be provided above the area, and thus, the light incident to the light inlet surface above the second light-folding portion 40 can also be effectively deflected to the battery pieces 10, thereby avoiding the phenomenon that the light is incident to the edge insulation area, and improving the photoelectric conversion performance of the photovoltaic module 100.

According to the utility model discloses photovoltaic module 100's local spotlight photovoltaic glass, one side of photovoltaic glass is formed into the play plain noodles, and one side of photovoltaic glass cell 10 dorsad is formed into the light inlet face, is equipped with first refraction portion 30 on at least one of photovoltaic glass's the light inlet face, and first refraction portion 30 is located photovoltaic module 100's solder strip 50 directly over so that the light refraction of solder strip top forms the facula on to cell 10. After the first light folding part 30 with a specific structure is pressed on the photovoltaic glass 20, sunlight irradiates the structure of the first light folding part 30, and the irradiated light is refracted by the first light folding part 30, so that the transmission route of the light is deflected and finally deviates to the effective power generation area of the cell 10, the light loss on the solder strip 50 is reduced, the light utilization rate of the photovoltaic module 100 is improved, and the photoelectric conversion efficiency of the photovoltaic module 100 is improved.

Further, the first refraction portion 30 includes at least one refraction unit, each refraction unit includes a plurality of lenses arranged at equal intervals along the solder strip direction, and the light is deflected by the lenses to form light spots. The arrangement of the refraction unit enables the light incident to the light inlet surface to be deflected and scattered, so that the light above the solder strip 50 is deflected to an effective power generation area after being incident to the light inlet surface, and the photoelectric conversion efficiency of the photovoltaic module 100 is improved.

Alternatively, the first refraction portion 30 is provided with at least one refraction surface 31, and the refraction surface 31 and the light entering surface are obliquely arranged. The light is deflected to the effective power generation region by the obliquely arranged refraction surface 31.

Preferably, an edge insulation area of the cell 10 is provided between two adjacent cell 10, and the photovoltaic module 100 further includes a second light folding portion 40. That is to say, an edge insulating region is disposed between two battery pieces 10, a second light folding portion 40 is disposed above an area corresponding to the edge insulating region, and light on a light inlet surface above the second light folding portion 40 can be effectively deflected onto the battery pieces 10, so that the photoelectric conversion performance of the photovoltaic module 100 is improved.

The photovoltaic module 100 and the local concentrating photovoltaic glass 20 used for the same according to the embodiments of the present invention are described in detail with reference to specific embodiments.

Example 1

As shown in fig. 5, according to the embodiment of the present invention, the length D1 of the local concentrating photovoltaic glass 20 is 700mm, the width D2 is 678mm, and two segments of the width direction have a plane length of 15 mm.

Meanwhile, a first refraction portion 30 is arranged on one side of the local concentrating photovoltaic glass 20, the first refraction portion 30 is composed of 4 groups of refraction units which are parallel to the length direction of the local concentrating photovoltaic glass and have the same equidistance, and each refraction unit is composed of a first refraction portion 30 structure with the same equidistance and a 5-strip-shaped appearance in the middle and a second refraction portion 40 structure with different equidistance and 2-strip-shaped appearances on two sides.

The distance d between the refraction surfaces 31 of the first refraction portion 40 is 31.2mm, the width c of the refraction surface 31 of the first refraction portion 30 is 1.8mm, the depth e of the refraction surface 31 of the first refraction portion 30 is 0.15mm, the structural distance a between the refraction surfaces 31 of the second refraction portion 40 is 18.5mm, the width d of the refraction surface 31 of the second refraction portion 40 is 3mm, and the depth f of the second refraction portion 40 is 0.15 mm.

Example 2

According to the utility model discloses a photovoltaic module 100, including positive photovoltaic glass 21, high refractive index encapsulation glued membrane and battery cluster group.

The battery string group is formed by connecting 4 multiplied by 4 battery pieces 10 which are arranged in a matrix in series, a first refraction part 30 on the front photovoltaic glass 21 or the front photovoltaic glass 21 and the back photovoltaic glass 22 corresponds to the solder strip 50, a second refraction part 40 on the front photovoltaic glass 21 or the front photovoltaic glass 21 and the back photovoltaic glass 22 corresponds to two sides of the battery string, the first refraction part 30 and the second refraction part 40 are respectively parallel to the solder strip 50 and the battery string, and the visible light refractive index of the high-refractive-index packaging adhesive film is 1.52.

In the photovoltaic module 100, after the light rays at both sides of the solder strip 50 and the battery string are refracted by the first light-folding portion 30 and the second light-folding portion 30, the incident light rays are deflected and uniformly irradiated to the effective power generation area in the battery piece 10.

Example 3

Firstly, according to the string arrangement method in the embodiment 2, the double-sided battery string is arranged and stringed, the local concentrating photovoltaic glass prepared in the embodiment 1 is used as the back photovoltaic glass 21 to be aligned with the battery string group, after the alignment, the first light folding part 30 and the second light folding part 40 respectively cover the welding strip 50 area and two sides of the battery string, the second light folding part 40 covers the edge of the battery string and is exposed by 1mm, then the front photovoltaic glass 21 with the same shape is aligned with the battery string group completely according to the lamination mode of the back photovoltaic glass 22, and finally, the shape of the local concentrating photovoltaic glass prepared in the embodiment 1 is always parallel to the welding strip and the edges of the battery pieces on two sides.

Example 4

Firstly, according to the string arrangement method in the embodiment 2, the single-sided battery string is arranged and stringed, the local concentrating photovoltaic glass 20 prepared in the embodiment 1 is used as the front-side photovoltaic glass to be aligned with the battery string group, after the alignment, the first light folding part 30 and the second light folding part 40 respectively cover the welding strip 50 area and two sides of the battery string, the second light folding part 40 covers the edges of the battery string and is exposed by 1mm, and finally, the shape of the local concentrating photovoltaic glass prepared in the embodiment 1 is always parallel to the edges of the welding strip and the battery pieces at two sides.

Claims (11)

1. A photovoltaic module, comprising:

the solar cell comprises a plurality of cell pieces, wherein one side of each cell piece is formed into a light-facing surface, the other side of each cell piece is formed into a backlight surface, at least one of the light-facing surface and the backlight surface is provided with a plurality of welding strips which are arranged at intervals, and an area between two adjacent welding strips or an area between the welding strips and the edge of the cell piece is formed into an effective power generation area;

the front photovoltaic glass is arranged on the light-facing surface;

the back photovoltaic glass is arranged on the backlight surface, one sides of the front photovoltaic glass and the back photovoltaic glass facing the cell piece form light emitting surfaces, and one sides of the front photovoltaic glass and the back photovoltaic glass facing away from the cell piece form light inlet surfaces;

first portion of refracting, first portion of refracting are located front photovoltaic glass with back photovoltaic glass's at least one on the light inlet surface, first portion of refracting is located the solder strip top, the light process of solder strip top first portion of refracting extremely form the facula on the battery piece, the facula is located effective power generation area.

2. The photovoltaic module according to claim 1, wherein the cell is a single-sided cell, the solder strip is disposed on the front surface, and the first folding portion is disposed on the light entrance surface of the front photovoltaic glass.

3. The photovoltaic module according to claim 1, wherein the cell is a double-sided cell, the solder strips are disposed on the front surface and the back surface, respectively, and the first light folding portion is disposed on the light inlet surface of the front photovoltaic glass and the back photovoltaic glass, respectively.

4. The photovoltaic module according to claim 1, wherein the first refraction portion is disposed right above the solder strip, the first refraction portion comprises at least one refraction unit, each refraction unit comprises a plurality of lenses disposed at equal intervals along the direction of the solder strip, a sawtooth-shaped groove is disposed on a side of the refraction unit facing away from the light inlet surface, and light is deflected through the sawtooth-shaped groove to form the light spot.

5. The photovoltaic module according to claim 1, wherein the first light folding portion is provided with:

at least one refracting surface, the refracting surface is arranged obliquely relative to the light inlet surface.

6. The photovoltaic module according to claim 5, wherein the solder strip and the first refraction portion are respectively formed in a strip shape, the number of the refraction surfaces is multiple, and the multiple refraction surfaces are symmetrically distributed along a center line of a section of the solder strip.

7. The photovoltaic module according to claim 1, wherein the number of the battery pieces is plural, two adjacent battery pieces are connected or spaced apart, the battery pieces are provided with battery piece edge insulation regions, each battery piece edge insulation region comprises battery piece edge insulation units which are respectively in one-to-one correspondence with the plurality of battery pieces, and at least a part of the battery piece edge insulation unit corresponding to one battery piece is arranged on an edge of one battery piece adjacent to a position where another battery piece is located; the photovoltaic module further includes:

and the second light folding part is positioned above the edge insulation area of the battery piece so as to enable light above the edge insulation area of the battery piece to be refracted to the battery piece.

8. The utility model provides a local spotlight photovoltaic glass for photovoltaic module, its characterized in that, one side of photovoltaic glass forms into out the plain noodles, one side of photovoltaic glass battery piece dorsad forms into advances the plain noodles, at least one of photovoltaic glass advance to be equipped with first portion of folding light on the plain noodles, first portion of folding light is located photovoltaic module's solder strip so that the light refraction of solder strip top extremely form the facula on the battery piece.

9. The local concentrating photovoltaic glass for a photovoltaic module according to claim 8, wherein the first light refraction portion comprises at least one light refraction unit, each light refraction unit comprises a plurality of lenses which are arranged at equal intervals along the solder strip direction, and light is deflected by the lenses to form the light spots.

10. The local concentrating photovoltaic glass for a photovoltaic module according to claim 8, wherein the first refraction portion is provided with:

and the refraction surface and the light inlet surface are obliquely arranged.

11. The local concentrating photovoltaic glass for a photovoltaic module according to claim 8, wherein a cell edge insulating region is provided between two adjacent cells, and the photovoltaic module further comprises:

and the second light folding part is positioned above the edge insulation area of the battery piece so as to enable light above the edge insulation area of the battery piece to be refracted to the battery piece.

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