CN219875677U - Junction box and photovoltaic module - Google Patents
Junction box and photovoltaic module Download PDFInfo
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- CN219875677U CN219875677U CN202321320816.3U CN202321320816U CN219875677U CN 219875677 U CN219875677 U CN 219875677U CN 202321320816 U CN202321320816 U CN 202321320816U CN 219875677 U CN219875677 U CN 219875677U
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- reflecting surface
- junction box
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
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- 239000004408 titanium dioxide Substances 0.000 claims description 3
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
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- Photovoltaic Devices (AREA)
Abstract
The utility model relates to the technical field of solar cells, and particularly provides a junction box and a photovoltaic module. The junction box is used for connecting the photovoltaic module with the cable and comprises a box body, and an accommodating cavity for arranging the conductive transmission piece is formed in the box body; the outer surface of the box body is at least partially a reflecting surface, and a connecting line of the top end and the bottom end of the reflecting surface forms an inclined included angle with the height direction of the junction box. The junction box provided by the utility model can improve the back power of the photovoltaic module.
Description
Technical Field
The utility model relates to the technical field of solar cells, in particular to a junction box and a photovoltaic module.
Background
With the development of the photovoltaic industry, the quality photovoltaic land is less and less, the market is more and more emphasized, and in some special installation scenes, such as intelligent farm guardrails, expressway fences, soundproof walls and the like, the photovoltaic components are required to be installed in an east-west direction and in a vertical direction, the back of the component directly receives light in the morning or in the evening, and when the front power of the component is the same, the higher the double-sided rate (back power of the component/front power of the component) of the component is, the higher the generated energy of the photovoltaic system is.
At present, the junction box body on the back of the photovoltaic module is rectangular in design, and the problem that the back power of the photovoltaic module cannot be exerted because part of light rays incident into the junction box body are reflected and cannot be utilized by the photovoltaic module possibly occurs.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the defect of low back power of the photovoltaic module in the prior art, so as to provide the junction box and the photovoltaic module.
The utility model provides a junction box which is used for connecting a photovoltaic module with a cable, and comprises a box body, wherein an accommodating cavity for arranging a conductive transmission piece is formed in the box body; the outer surface of the box body is at least partially a reflecting surface, and a connecting line of the top end and the bottom end of the reflecting surface and the height direction of the junction box form an inclined included angle.
Optionally, a connecting line between the top end and the bottom end of the reflecting surface and the height direction of the junction box form an inclined included angle, and the inclined included angle is 10-80 degrees.
Optionally, a reflective film is arranged on the surface of the reflective surface; the reflective film comprises a titanium dioxide reflective film, an aluminum reflective film, an acrylic polymer reflective film, a polyester resin reflective film or a polyvinyl chloride reflective film; the thickness of the reflecting film is 10 mu m-50 mu m.
Optionally, the reflecting surface is a plane or a curved surface; when the reflecting surface is curved, the reflecting surface is concavely arranged towards the inside of the box body, or the reflecting surface is convexly arranged away from the inside of the box body.
Optionally, the outer surface of the box body comprises a top surface and four side surfaces; at least one side surface of the box body is a reflecting surface; when the number of the reflecting surfaces is multiple, the four side surfaces of the box body are respectively a first reflecting surface and a third reflecting surface which are oppositely arranged, and a second reflecting surface and a fourth reflecting surface which are oppositely arranged; the top surface is connected with the first reflecting surface, the third reflecting surface, the second reflecting surface and the fourth reflecting surface; the dimension of the top surface is less than one fifth of the orthographic projection dimension of the junction box in the height direction of the junction box.
Optionally, the box body includes a connection structure and a light reflecting structure, and at least one outer surface of the light reflecting structure is the light reflecting surface; the height dimension of the connecting structure is 0mm-6mm.
Optionally, the longitudinal cross-sectional shape of the connection structure includes a rectangle; the longitudinal section shape of the reflecting structure comprises a trapezoid or triangle; the longer bottom edge of the trapezoid is connected with the connecting structure; or the base of the triangle is connected with the connecting structure.
Optionally, the connection structure and the light reflecting structure are an integral structure; the connecting structure is provided with two leading-out holes at one side far away from the reflecting structure, and the leading-out holes are suitable for connecting the photovoltaic module with the conductive transmission piece; the connection structure further comprises two terminals adapted for connection of the conductive transmission member to a cable.
The utility model provides a photovoltaic module, comprising: the junction box provided by the utility model; a photovoltaic module; the photovoltaic module comprises a solar battery pack and an encapsulation layer positioned on at least one side of the solar battery pack; the junction boxes are arranged on the same side surface of the packaging layer at intervals.
Optionally, an included angle of 10 ° -80 ° is formed between a connecting line of the top end and the bottom end of the reflecting surface and the photovoltaic module.
The utility model has the beneficial effects that:
the junction box is generally arranged on one side of the back surface of the photovoltaic module, and the outer surface of the box body is provided with the reflecting surface, so that a connecting line of the top end and the bottom end of the reflecting surface and the height direction of the junction box form an inclined included angle, and when sunlight irradiates the outer surface of the box body, the reflecting surface can directly reflect sunlight to the back surface of the photovoltaic module, the utilization rate of the sunlight is improved, and the back power of the photovoltaic module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a junction box in embodiment 1 of the present utility model;
FIG. 2 is a schematic cross-sectional view of the junction box in embodiment 1 of the present utility model;
fig. 3 is another schematic cross-sectional view of the junction box in embodiment 1 of the present utility model;
fig. 4 is another schematic cross-sectional view of the junction box in embodiment 1 of the present utility model;
fig. 5 is a schematic view of another structure of the junction box in embodiment 1 of the present utility model;
fig. 6 is a schematic structural view of a junction box and a photovoltaic module in embodiment 2 of the present utility model;
reference numerals illustrate:
an A-connection structure; b-a light reflecting structure; 100-junction box; 110-a receiving cavity; 120-reflecting surface; 1201-first reflective surface; 1202-a second reflective surface; 1203-third reflective surface; 1204-a fourth reflective surface; 130-top surface; 200-a photovoltaic module; e-incident light; f-reflecting light; alpha-inclination angle; and an included angle between the beta-reflecting surface and the photovoltaic component.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a junction box 100 for connection of a photovoltaic module and a cable, the junction box 100 including a box body having an accommodating cavity 110 for providing a conductive transmission member therein; the outer surface of the box body is at least partially a light reflecting surface 120, and a connection line between the top end and the bottom end of the light reflecting surface 120 forms an inclined angle α with the height direction of the junction box 100.
In this embodiment, α in fig. 2 is represented as an inclined angle α formed between the line connecting the top and bottom ends of the light reflecting surface 120 and the height direction of the junction box 100. The junction box 100 is generally mounted on one side of the back surface of the photovoltaic module, and since the outer surface of the box body is provided with the reflecting surface 120, a connection line between the top end and the bottom end of the reflecting surface 120 forms an inclined angle α with the height direction of the junction box 100. When the sunlight irradiates the outer surface of the box body, the sunlight can be directly reflected to the back surface of the photovoltaic module by the reflecting surface, so that the utilization rate of the sunlight is improved, and the back power of the photovoltaic module is improved.
In one embodiment, the inclination angle α between the line connecting the top and bottom ends of the reflective surface 120 and the height direction of the junction box 100 is 10 ° -80 °. For example 10 °, 30 °, 60 ° or 80 °. If the inclined included angle α is smaller than 10 °, the junction box 100 is too high, which is easy to block sunlight; if the inclined included angle alpha is larger than 80 degrees, the degree that the sunlight is reflected to the back surface of the photovoltaic module by the reflecting surface is smaller, and the effect of improving the utilization rate of the sunlight is weakened.
In one embodiment, the surface of the light reflecting surface 120 is provided with a light reflecting film (not shown). The reflective film is arranged on the surface of the reflective surface 120, so that the reflective effect of the reflective surface 120 can be enhanced, more sunlight is reflected to the back surface of the photovoltaic module on the surface of the reflective surface 120, the utilization rate of the sunlight is further improved, and the back power of the photovoltaic module is further improved.
In one embodiment, the retroreflective sheeting comprises titanium dioxide retroreflective sheeting, aluminum retroreflective sheeting, acrylic polymeric retroreflective sheeting, polyester resin retroreflective sheeting, or polyvinyl chloride retroreflective sheeting. In other embodiments, the retroreflective sheeting may be retroreflective sheeting of other materials.
In one embodiment, the reflective film has a thickness of 10 μm to 50 μm, for example 10 μm, 20 μm, 30 μm, 40 μm or 50 μm. If the thickness of the reflecting film is smaller, the effect of enhancing the reflecting effect of the reflecting surface is weakened; if the thickness of the reflective film is larger, materials are wasted, and the process cost is high.
In one embodiment, the light reflecting surface 120 is a plane or a curved surface; when the light reflecting surface 120 is curved, the light reflecting surface 120 is concavely disposed toward the inside of the case, or the light reflecting surface 120 is convexly disposed away from the inside of the case.
In this embodiment, the case includes a connection structure a and a light reflecting structure B, and at least one outer surface of the light reflecting structure B is the light reflecting surface 120. When the sunlight irradiates the reflective structure B, the reflective surface 120 can directly reflect the sunlight to the back surface of the photovoltaic module, so as to improve the utilization rate of the sunlight, thereby improving the back power of the photovoltaic module.
It should be noted that, the height dimension of the connection structure a is 0mm-6mm, for example 0mm, 3mm or 6mm, when the height of the connection structure is 0mm, the bottom end of the light reflecting structure is directly attached to the back of the photovoltaic module; if the height of the connecting structure is greater than 6mm, the side face of the junction box shields more sunlight, and the effect of improving the back power of the photovoltaic module is weak. The height direction of the connection structure a is identical to the height direction of the junction box 100.
It should be noted that, the box body may have a receiving cavity 110 for setting a conductive transmission member, that is, the connection structure a and the reflective structure B are both provided with the conductive transmission member inside; the connecting structure A can also be provided with a containing cavity 110 for arranging a conductive transmission piece, and the reflecting structure B is a hollow cavity; it is also possible that the light reflecting structure B has a receiving cavity 110 for providing the conductive transmission member, and the light reflecting structure B is a hollow cavity.
In this embodiment, the longitudinal cross-sectional shape of the connection structure a includes a rectangle; the longitudinal section shape of the light reflecting structure B comprises a trapezoid or triangle; the longer bottom edge of the trapezoid is connected with the connecting structure; alternatively, the base of the triangle is connected to the connection structure a.
Specifically, the connection structure a and the light reflecting structure B are an integral structure, one side of the connection structure a away from the light reflecting structure B is provided with two lead-out holes (not shown in the figure), and the lead-out holes are suitable for connecting the photovoltaic module with the conductive transmission piece; the connection structure a further comprises two terminals (not shown) adapted to connect the conductive transmission member with a cable.
In this embodiment, the cross section of the connection structure a is rectangular, the cross section of the light reflecting structure B is trapezoidal, specifically, the cross section of the light reflecting structure B is right trapezoid, and the light reflecting structure B has a light reflecting surface 120, which is a specific embodiment, and the structure of the junction box is described as follows:
referring to fig. 2, the light reflecting surface 120 is planar, and a plane of a connection line between an end of the light reflecting surface 120 facing away from the connection structure a and an end of the light reflecting surface 120 connected with the connection structure a is a plane of the light reflecting surface 120; the angle between the reflecting surface 120 and the height direction of the connection structure a is 10 ° to 80 °, and illustratively, the angle between the reflecting surface 120 and the height direction of the connection structure a is 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 ° or 80 °.
Referring to fig. 3, the light reflecting surface 120 is a curved surface, and the light reflecting surface 120 is concavely disposed toward the connection structure. The dashed line in fig. 2 indicates a connection line between an end of the light reflecting surface 120 facing away from the connection structure a and an end of the light reflecting surface 120 connected to the connection structure a; in fig. 3, α represents an angle between the light reflecting surface 120 and the height direction of the connection structure a.
Referring to fig. 4, the light reflecting surface 120 is curved, and the light reflecting surface 120 is disposed away from the protrusion of the connection structure. The dashed line in fig. 3 indicates a connection line between an end of the light reflecting surface 120 facing away from the connection structure a and an end of the light reflecting surface 120 connected to the connection structure a; in fig. 4, α represents an angle between the reflecting surface 120 and the height direction of the connection structure a.
It should be noted that, in the embodiment, when the cross-sectional shape of the light reflecting structure B is a triangle, the light reflecting structure B may refer to the existing conical shape, and the light reflecting surface is a curved surface, which is not specifically illustrated in the drawings of the present utility model.
In one embodiment, the outer surface of the case includes a top surface and four side surfaces; at least one side surface of the box body is a reflecting surface. Any one of the four side surfaces may be a reflective surface; any two side surfaces can be light reflecting surfaces; any three side surfaces can be used as reflecting surfaces; it is also possible that all four side surfaces are light-reflecting surfaces.
In this embodiment, referring to fig. 5, a schematic perspective view of the junction box 100 is shown. The number of the reflecting surfaces 120 is plural, specifically, the number of the reflecting surfaces 120 is four, and the outer surface of the box body is provided with a first reflecting surface 1201 and a third reflecting surface 1203 which are oppositely arranged, and a second reflecting surface 1202 and a fourth reflecting surface 1204 which are oppositely arranged; the top surface 130 is connected to the first light reflecting surface 1201, the third light reflecting surface 1203, the second light reflecting surface 1202 and the fourth light reflecting surface 1204. The four reflecting surfaces enable sunlight to be reflected to the back surface of the photovoltaic module more, the utilization rate of the sunlight is greater, and therefore the back power of the photovoltaic module is further improved. The size of the top surface is smaller than one fifth of the orthographic projection size of the junction box in the height direction of the junction box, and if the size of the top surface is too large, excessive sunlight can be reflected by the original path of the top surface, so that the effect of improving the back power of the photovoltaic module is weak.
Specifically, the connection line between the top and bottom ends of the first reflecting surface 1201 and the second reflecting surface 1202 forms an angle of 10 ° to 80 ° with the height direction of the junction box 100; the connection line between the top and bottom ends of the third reflective surface 1203 and the fourth reflective surface 1204 forms an angle of 10 to 80 ° with the height direction of the junction box 100. By adopting the included angles in the range, the reflected light rays reflected to the photovoltaic module by the surfaces of the first reflecting surface 1201, the third reflecting surface 1203, the second reflecting surface 1202 and the fourth reflecting surface 1204 are more uniform; and secondly, the light reflecting surfaces can increase the probability of incident light reaching the photovoltaic, and further improve the back power of the photovoltaic module.
Example 2
The present embodiment provides a photovoltaic module, referring to fig. 6, including: junction box 100 in at least two embodiments;
a photovoltaic module 200; the photovoltaic module 200 includes a solar cell stack and an encapsulation layer located on at least one side of the solar cell stack; the junction boxes 100 are spaced apart from each other on the same side surface of the encapsulation layer.
Specifically, the junction box 100 is disposed on the back surface of the photovoltaic module 200. Referring to fig. 6, in the light path diagram of the light reflecting surface 120, when the sunlight irradiates the outer surface of the box body, the light reflecting surface 120 can directly reflect the incident light E to form reflected light F to be directed to the back surface of the photovoltaic module 200, so as to improve the utilization rate of the sunlight, and thus improve the back power of the photovoltaic module.
Bifacial ratio of solar cell module = module back power/module front power. The higher the double-sided rate of the solar cell module is, the higher the generated energy of the photovoltaic system is. The double-sided rate of the solar cell module is greater than or equal to 95% through measurement and calculation; compared with the solar cell module in the prior art, the power generation amount of the solar cell module is increased by 5W.
In one embodiment, the line connecting the top and bottom ends of the reflective surface 120 forms an angle of 10 ° -80 ° with the photovoltaic module 200.
The dashed line in fig. 6 represents the line connecting the top and bottom ends of the light reflecting surface 120; beta in fig. 6 represents an angle between the light reflecting surface 120 and the photovoltaic module 200.
The solar battery pack comprises a plurality of parallel battery strings, wherein each battery string comprises a plurality of battery plates connected in series.
In one embodiment, the photovoltaic module 200 further comprises: the packaging adhesive film is positioned on one side of the packaging layer, which faces the solar battery pack; the packaging layer comprises a back plate or glass; the packaging adhesive film comprises a polyethylene-polyvinyl acetate copolymer adhesive film, an expandable polyethylene adhesive film, a polyvinyl butyral adhesive film or an ethylene-octene copolymer adhesive film.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. The junction box is used for connecting a photovoltaic module and a cable and comprises a box body, and is characterized in that an accommodating cavity for arranging a conductive transmission piece is formed in the box body; the outer surface of the box body is at least partially a reflecting surface, and a connecting line of the top end and the bottom end of the reflecting surface and the height direction of the junction box form an inclined included angle.
2. The junction box according to claim 1, wherein the inclination angle between the line connecting the top end and the bottom end of the light reflecting surface and the height direction of the junction box is 10 ° -80 °.
3. The junction box according to claim 1, wherein the surface of the light-reflecting surface is provided with a light-reflecting film; the reflective film comprises a titanium dioxide reflective film, an aluminum reflective film, an acrylic polymer reflective film, a polyester resin reflective film or a polyvinyl chloride reflective film; the thickness of the reflecting film is 10 mu m-50 mu m.
4. The junction box according to claim 1, wherein the light reflecting surface is planar or curved; when the reflecting surface is curved, the reflecting surface is concavely arranged towards the inside of the box body, or the reflecting surface is convexly arranged away from the inside of the box body.
5. The junction box according to claim 1, wherein the outer surface of the box body comprises a top surface and four side surfaces; at least one side surface of the box body is a reflecting surface; when the number of the reflecting surfaces is multiple, the four side surfaces of the box body are respectively a first reflecting surface and a third reflecting surface which are oppositely arranged, and a second reflecting surface and a fourth reflecting surface which are oppositely arranged; the top surface is connected with the first reflecting surface, the third reflecting surface, the second reflecting surface and the fourth reflecting surface; the dimension of the top surface is less than one fifth of the orthographic projection dimension of the junction box in the height direction of the junction box.
6. The junction box according to claim 1, wherein said box body comprises a connection structure and a light reflecting structure, at least one outer surface of said light reflecting structure being said light reflecting surface; the height dimension of the connecting structure is 0mm-6mm.
7. The junction box according to claim 6, wherein a longitudinal cross-sectional shape of the connection structure includes a rectangular shape; the longitudinal section shape of the reflecting structure comprises a trapezoid or triangle; the longer bottom edge of the trapezoid is connected with the connecting structure; or the base of the triangle is connected with the connecting structure.
8. The junction box of claim 6 wherein said connection structure and said light reflecting structure are a unitary structure;
the connecting structure is provided with two leading-out holes at one side far away from the reflecting structure, and the leading-out holes are suitable for connecting the photovoltaic module with the conductive transmission piece; the connection structure further comprises two terminals adapted for connection of the conductive transmission member to a cable.
9. A photovoltaic module, comprising: at least two junction boxes according to any one of claims 1 to 8;
a photovoltaic module; the photovoltaic module comprises a solar battery pack and an encapsulation layer positioned on at least one side of the solar battery pack; the junction boxes are arranged on the same side surface of the packaging layer at intervals.
10. The photovoltaic module of claim 9, wherein the line connecting the top and bottom ends of the reflective surface forms an angle of 10 ° -80 ° with the photovoltaic module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321320816.3U CN219875677U (en) | 2023-05-24 | 2023-05-24 | Junction box and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321320816.3U CN219875677U (en) | 2023-05-24 | 2023-05-24 | Junction box and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875677U true CN219875677U (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321320816.3U Active CN219875677U (en) | 2023-05-24 | 2023-05-24 | Junction box and photovoltaic module |
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| Country | Link |
|---|---|
| CN (1) | CN219875677U (en) |
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2023
- 2023-05-24 CN CN202321320816.3U patent/CN219875677U/en active Active
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Address after: No. 99 Qingliu Road, Xuancheng Economic and Technological Development Zone, Xuancheng City, Anhui Province Patentee after: Anhui Huasheng New Energy Technology Co.,Ltd. Country or region after: China Address before: Science and Technology Park, Xuancheng Economic and Technological Development Zone, Xuancheng City, Anhui Province Patentee before: Anhui Huasheng New Energy Technology Co.,Ltd. Country or region before: China |