阅读说明：本技术 光伏组件 (Photovoltaic module ) 是由 刘洪明 刘秤明 赖兴余 顾忆华 吴云溪 王辉 胡红坡 伍世平 谢松延 芦真真 李 于 2021-09-15 设计创作，主要内容包括：本发明提供的光伏组件包括主体、接线盒和反光结构,主体包括电池片组件和用于封装电池片组件的光伏玻璃,电池片组件包括汇流条和至少两个电池串,电池串包括通过焊带串联的至少两片电池片,多个电池串的焊带均与汇流条电连接；主体包括电池片区域和接线区域,多个电池串位于电池片区域,汇流条位于接线区域；接线盒通过粘接材料固定在接线区域的背侧；反光结构固定在接线区域的表侧,反光结构具有反光表面。反光结构从上方遮挡以防止阳光直照汇流条、粘接材料和接线盒,改善外观且避免粘接材料老化降解而影响接线盒的密封性、牢固性以及电性能,因而延长产品寿命,且照射到反光表面的入射光被反射到电池片上,增大发电量。(The photovoltaic module provided by the invention comprises a main body, a junction box and a reflecting structure, wherein the main body comprises a cell piece assembly and photovoltaic glass for packaging the cell piece assembly, the cell piece assembly comprises a bus bar and at least two cell strings, the cell strings comprise at least two cell pieces which are connected in series through welding strips, and the welding strips of the plurality of cell strings are electrically connected with the bus bar; the main body comprises a battery plate area and a wiring area, the plurality of battery strings are positioned in the battery plate area, and the bus bar is positioned in the wiring area; the junction box is fixed on the back side of the junction area through an adhesive material; the light reflecting structure is fixed on the surface side of the wiring area and is provided with a light reflecting surface. The reflecting structure is shielded from the upper side to prevent sunlight from directly irradiating the bus bar, the bonding material and the junction box, the appearance is improved, the sealing property, the firmness and the electrical property of the junction box are prevented from being influenced by aging and degradation of the bonding material, the service life of a product is prolonged, incident light irradiating the reflecting surface is reflected to the battery piece, and the power generation amount is increased.)

1. The photovoltaic module comprises a main body and a junction box, wherein the main body comprises a cell piece assembly and photovoltaic glass used for packaging the cell piece assembly, the cell piece assembly comprises a bus bar and at least two cell strings, the cell strings comprise at least two cell pieces which are connected in series through solder strips, and the solder strips of the cell strings are electrically connected with the bus bar;

in the extending direction of the photovoltaic glass, the main body comprises a cell area and a wiring area, a plurality of cell strings are positioned in the cell area, and the bus bar is positioned in the wiring area; the junction box is fixed on the back side of the junction area through an adhesive material;

the method is characterized in that:

the photovoltaic module further comprises a light reflecting structure;

the light reflecting structure is fixed on the surface side of the wiring area, and in the thickness direction of the main body, the light reflecting structure shields the bus bar, the bonding material and the wiring box;

the light reflecting structure has a light reflecting surface for reflecting incident light to a surface side surface of the cell region.

2. The photovoltaic module of claim 1, wherein:

the light reflecting structure is triangular prism shape, wherein two sides of triangular prism are two respectively the reflection of light surface, the third side of triangular prism with the main part is connected.

3. The photovoltaic module of claim 2, wherein:

the main body further comprises two cell areas, and the two cell areas are respectively positioned at two opposite sides of the wiring area in the extending direction of the photovoltaic glass;

the two light reflecting surfaces are respectively arranged corresponding to the two battery piece areas.

4. The photovoltaic module of claim 2, wherein:

along the length direction of reflecting structure, reflecting structure's cross-section is isosceles triangle, two reflecting surface symmetry sets up.

5. The photovoltaic module of claim 2, wherein:

the light reflecting structure has a top remote from the body, and edges of the two light reflecting surfaces are connected to the top.

6. The photovoltaic module of any one of claims 1 to 5, wherein:

the included angle between the light reflecting surface and the surface side surface of the battery plate area is 40-70 degrees.

7. The photovoltaic module of claim 6, wherein:

the included angle between the reflecting surface and the surface side surface of the battery plate area is 45-60 degrees.

8. The photovoltaic module of any one of claims 1 to 5, wherein:

and on the projection of the thickness direction of the main body, the junction box is integrally positioned on the inner periphery of the contour line of the reflecting structure.

9. The photovoltaic module of any one of claims 1 to 5, wherein:

the edge of the light reflecting surface is connected with the surface side surface of the photovoltaic glass.

10. The photovoltaic module of any one of claims 1 to 5, wherein:

the reflective surface is provided with a reflective material coating, and the reflectivity of the reflective surface is more than 95%.

Technical Field

The invention relates to the technical field of solar power generation, in particular to a photovoltaic module.

Background

Current photovoltaic module includes single glass photovoltaic module and dual glass photovoltaic module, and wherein, single glass photovoltaic module generally takes photovoltaic glass, packaging material, battery piece subassembly, packaging material and backplate sandwich structure coincide in proper order, installs the frame additional all around simultaneously. The double-glass photovoltaic module adopts a sandwich structure formed by sequentially overlapping photovoltaic glass, packaging materials, a cell piece assembly, the packaging materials and the photovoltaic glass, and no frame is arranged around the double-glass photovoltaic module. Photovoltaic glass generally is toughened glass, and packaging material is encapsulation glued membranes such as EVA, POE, PVB, and the battery piece subassembly includes a plurality of battery clusters, and the battery cluster is including utilizing the polylith battery piece of welding rod series connection, and the battery piece is single crystal or polycrystal battery piece, and the welding rod of a plurality of battery clusters all is connected to on the busbar, and the busbar is connected to in the terminal box.

In order to prevent the junction box from shielding the cell, the junction box is fixed on the back side of the photovoltaic module through organic silica gel. The problem that this kind of current photovoltaic module exists is because the photovoltaic glass of photovoltaic module surface side or dorsal back board or photovoltaic glass are transparent material, and silica gel and terminal box can receive the front irradiation of sunlight, and long-term direct-lighting can cause silica gel yellow stain even ageing degradation, reduces terminal box leakproofness, fastness and electrical property to influence photovoltaic module's reliability in service, shorten product life. In addition, the organic silicon gel and the junction box can be seen from the front side of the photovoltaic module, and the appearance is affected.

Disclosure of Invention

The invention aims to provide a photovoltaic module which can shield silica gel and a junction box, beautify the appearance and increase the power generation capacity.

The photovoltaic module provided by the invention comprises a main body and a junction box, wherein the main body comprises a cell piece assembly and photovoltaic glass for packaging the cell piece assembly, the cell piece assembly comprises a bus bar and at least two cell strings, the cell strings comprise at least two cell pieces which are connected in series through welding strips, and the welding strips of the cell strings are electrically connected with the bus bar; in the extending direction of the photovoltaic glass, the main body comprises a cell area and a wiring area, the plurality of cell strings are positioned in the cell area, and the bus bars are positioned in the wiring area; the junction box is fixed on the back side of the junction area through an adhesive material; the photovoltaic module also comprises a light reflecting structure; the light reflecting structure is fixed on the surface side of the wiring area, and shields the bus bar, the bonding material and the wiring box in the thickness direction of the main body; the light reflecting structure has a light reflecting surface for reflecting incident light to a surface side surface of the cell region.

According to the scheme, the reflecting structure is additionally arranged, the bus bar, the bonding material and the junction box are shielded by the reflecting structure from the upper side, sunlight is prevented from directly irradiating the bus bar, the bonding material and the junction box, the appearance is improved, meanwhile, the sealing performance, the firmness and the electrical performance of the junction box are prevented from being influenced by aging and degradation of the bonding material, the service life of a product is prolonged, and in addition, the sunlight irradiating the reflecting surface of the reflecting structure is reflected to the battery piece, so that the generating capacity is increased.

The further scheme is that the light reflecting structure is in a triangular prism shape, two side surfaces of the triangular prism are two light reflecting surfaces respectively, and the third side surface of the triangular prism is connected with the main body.

Therefore, the arrangement can reduce the heat absorption capacity of the reflecting structure as much as possible, avoid the heat from being transferred to the main body and the junction box through the solid medium, and further reduce the influence on the bonding material and the junction box.

The main body further comprises two battery piece areas, and the two battery piece areas are respectively positioned at two opposite sides of the wiring area in the extending direction of the photovoltaic glass; the two light reflecting surfaces are respectively arranged corresponding to the two battery plate areas.

Therefore, with the arrangement, the emergent light energy of the two light reflecting surfaces can respectively enter the cell pieces in the two cell piece areas, so that the reflected light can be further effectively absorbed, and the generating capacity can be further increased.

The further scheme is that the cross section of the light reflecting structure is in an isosceles triangle shape along the length direction of the light reflecting structure, and the two light reflecting surfaces are symmetrically arranged.

Therefore, the arrangement is favorable for the installation of the reflecting structure, and the uniform illumination intensity of emergent light on the two reflecting surfaces and the symmetry of the incident position of the cell area are favorable.

Further, the light reflecting structure has a top remote from the body, and edges of the two light reflecting surfaces are attached to the top.

From the above, it can be seen that this arrangement allows light reaching the reflective structure to reach the reflective surface as much as possible and be reflected and utilized.

Further, the included angle between the light reflecting surface and the surface side surface of the battery plate area is 40-70 degrees.

In a further aspect, the angle between the light reflecting surface and the surface of the cell region is between 45 degrees and 60 degrees.

Therefore, the included angle is set to be beneficial to light emitted from the reflecting surface to reach the battery piece area, and the generated energy is further increased.

The further scheme is that the whole junction box is positioned on the inner periphery of the contour line of the reflecting structure in the projection of the thickness direction of the main body.

From top to bottom, reflecting structure can cover busbar, bonding material and terminal box from the top, further guarantees the effect of sheltering from to busbar, bonding material and terminal box.

In a further embodiment, the edge of the light-reflecting surface is connected to the front side surface of the photovoltaic glass.

It is from top to bottom, this setting can avoid some sunlight to arrive the table side of wiring region from the clearance between light reflecting structure and the main part, and then shines busbar, bonding material and terminal box, further guarantees the effect of sheltering from to busbar, bonding material and terminal box.

The further proposal is that the reflecting surface is provided with a reflecting material coating, and the reflectivity of the reflecting surface is more than 95 percent.

As can be seen, this arrangement can further increase the power generation.

Drawings

Fig. 1 is a structural view of a first embodiment of a photovoltaic module according to the present invention.

Fig. 2 is a partial schematic view of a first embodiment of a photovoltaic module according to the present invention.

Fig. 3 is a structural view of a first embodiment of a photovoltaic module according to the present invention.

Fig. 4 is a partial schematic view of a first embodiment of a photovoltaic module according to the present invention.

Fig. 5 is a partial schematic view of a photovoltaic module according to a third embodiment of the present invention.

Detailed Description

First embodiment of photovoltaic Module

Referring to fig. 1 and 2, the photovoltaic module of the present embodiment includes a main body 1, a junction box 2 and a reflective structure 3, and along a thickness direction of the main body 1, from a front side to a back side of the main body 1, the main body 1 includes a front side photovoltaic glass 11, a first transparent encapsulant film 12, a cell assembly 13, a second transparent encapsulant film 14 and a back side photovoltaic glass 15, which are sequentially disposed, where the front side photovoltaic glass 11 and the back side photovoltaic glass 15 are both the photovoltaic glass of the present invention. The front photovoltaic glass 11 and the back photovoltaic glass 15 are both tempered glass or semi-tempered glass, an AR antireflection film is arranged on the upper surface (front surface) of the front photovoltaic glass 11, reflection of sunlight can be reduced, the lower surface of the front photovoltaic glass 11 has a fluff microstructure, an antireflection effect on sunlight is achieved, the light transmittance of the photovoltaic glass 1 is larger than or equal to 91%, and the light transmittance of the back photovoltaic glass is larger than or equal to 88%. In addition, the first transparent encapsulant film 12 and the second transparent encapsulant film 14 are encapsulant films such as EVA, POE, or PVB, and the battery piece 131 in the battery piece assembly 13 is a single crystal or polycrystalline battery piece.

Wherein the battery sheet assembly 13 includes a bus bar 139 and six battery strings 130, each battery string 130 includes ten battery sheets 131 connected in series by solder ribbons 132, and the solder ribbons 132 of the six battery strings 130 are electrically connected to the bus bar 139.

As shown in fig. 1 and 2, the main body 1 includes a cell region 101 and a terminal region 102 in the extending direction of the front side photovoltaic glass 11, the cell strings 130 are each located in the cell region 101, and the bus bar 139 is located in the terminal region 102. Referring to fig. 2, the terminal block 2 is fixed on the back side 102b of the terminal area 102 by an adhesive material 29, the adhesive material 29 of the present embodiment is silicone; reflecting structure 3 fixes at wiring region 102's table side 102a, and reflecting structure 3 of this embodiment is the triangular prism form, and wherein two sides of triangular prism are first reflecting surface 31 and second reflecting surface 32 respectively, and the third side is for connecting face 33, connects face 33 and the last fixed surface of table side photovoltaic glass 11 and is connected, and first reflecting surface 31 and second reflecting surface 32 set up and the symmetry sets up relatively. The reflectivity of the first light reflecting surface 31 and the reflectivity of the second light reflecting surface 32 are both greater than 95%, as shown in fig. 2, the cross section of the light reflecting structure 3 is isosceles triangle along the length direction of the light reflecting structure 3, and the included angle between the first light reflecting surface 31 and the surface side surface of the battery piece region 101a is 45 degrees.

In addition, the edge of the first light reflecting surface 31 is connected to the front side surface of the front side photovoltaic glass 11, the light reflecting structure 3 has a top 39 away from the main body, and the edge of the first light reflecting surface 31 and the edge of the second light reflecting surface 32 are connected to the top 39. The terminal block 2 is located entirely on the inner periphery of the outline of the reflector 3 in the projection in the thickness direction of the main body 1, i.e., the reflector 3 can completely block the bus bar 139, the adhesive 29, and the terminal block 2 from above as shown in fig. 2.

As shown in fig. 2, the light reflecting structure 3 can not only completely shield the bus bar 139, the adhesive 29 and the junction box 2 from above, so as to prevent sunlight from directly irradiating the bus bar 139, the adhesive 29 and the junction box 2, and improve the appearance while preventing the adhesive 29 from aging and degrading to affect the sealing property, the firmness and the electrical property of the junction box 2, thereby prolonging the product life, but also can reflect the solar light irradiated to the first light reflecting surface 31 onto the surface of the front side 101a of the cell region 101, and further reach the plurality of cell assemblies 13 of the cell region 101, thereby increasing the power generation amount.

Second embodiment of photovoltaic Module

Referring to fig. 3 and 4, the photovoltaic module of the present embodiment is a double-sided half-sheet photovoltaic module, and compared with the previous embodiment, the main difference of the present embodiment is: in the extending direction of the photovoltaic glass, the photovoltaic module comprises a first cell area 401, a second cell area 403 and a wiring area 402 between the first cell area 401 and the second cell area 403, i.e. the two cell areas are respectively located at two opposite sides of the wiring area 402.

Therefore, the first cell region 401 and the second cell region 403 are respectively located at the left and right sides of the light reflecting structure 5, and in this case, the first light reflecting surface 51 is disposed corresponding to the first cell region 401, the incident light of the first light reflecting surface 51 can be reflected to the surface of the front side 401a of the first cell region 401, and the second light reflecting surface 52 is disposed corresponding to the second cell region 403, and the incident light of the second light reflecting surface 52 can be reflected to the surface of the front side 403a of the second cell region 403.

Therefore, in the present embodiment, both the first light reflecting surface 51 and the second light reflecting surface 52 on the front side of the light reflecting structure 5 can serve as effective light reflecting surfaces, and incident light is reflected to the corresponding cell areas to be absorbed by the cell assembly, thereby further increasing the amount of power generation.

Third embodiment of photovoltaic Module

As shown in fig. 5, in the present embodiment, the light reflecting structure 63 is provided with only one light reflecting surface 631, the light reflecting surface 631 can reflect incident light to the surface side surface 611a of the cell region 611, but a second surface 632 of the light reflecting structure 63, which is disposed opposite to the light reflecting surface 631, has no reflective property, and the second surface 632 is disposed perpendicular to the photovoltaic glass. Similarly, in other embodiments, as shown in FIG. 2, the second light reflecting surface 32 does not have light reflecting properties.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.