Photovoltaic module heat dissipation backboard and photovoltaic module

Abstract

The utility model relates to a photovoltaic module heat radiation backboard and a photovoltaic module. The photovoltaic module heat dissipation backboard comprises an aluminum foil layer, a middle supporting layer and an inner bonding layer which are sequentially connected, the inner bonding layer and the aluminum foil layer are located on the two sides of the middle supporting layer respectively, and a heat dissipation piece is arranged on the side, away from the middle supporting layer, of the aluminum foil layer. The inner bonding layer and the aluminum foil layer are located on the two sides of the middle supporting layer respectively, the inner bonding layer is used for being bonded with a battery piece in the photovoltaic module, the aluminum foil layer is used for being in contact with air, so that the water blocking effect is achieved, the aluminum foil layer has good heat conduction performance, and the service life of the aluminum foil layer is prolonged. Heat can be timely transferred to the heat dissipation piece arranged on the side, facing air, of the aluminum foil layer, heat dissipation is carried out through the heat dissipation piece, and the heat dissipation efficiency of the photovoltaic module heat dissipation backboard is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic module heat dissipation back plate and a photovoltaic module. Background Art

[0002] Solar cell modules accumulate considerable heat while performing photoelectric conversion. The temperature rise of the modules will directly affect the photoelectric conversion efficiency of the cells. Conventional photovoltaic module backplanes use a PET substrate of a certain thickness, double-sided fluorine coating or adhesive composite fluorine film, in an attempt to protect the PET substrate from wet heat aging and UV aging, thereby extending the service life of the module. However, the heat dissipation of the backplane of this structure is relatively poor, which easily causes heat accumulation in the module, thereby affecting the photoelectric conversion efficiency of the cell. Utility Model Content

[0003] Based on this, it is necessary to provide a photovoltaic module heat dissipation backplane to address the technical problem that the backplane of a conventional photovoltaic module has relatively poor heat dissipation, which easily causes heat accumulation in the module and thus affects the photoelectric conversion efficiency of the battery cell.

[0004] A photovoltaic module heat dissipation backplane comprises an aluminum foil layer, an intermediate support layer and an inner bonding layer connected in sequence, wherein the inner bonding layer and the aluminum foil layer are respectively located on both sides of the intermediate support layer, and a heat dissipation element is provided on the side of the aluminum foil layer away from the intermediate support layer.

[0005] In one embodiment, the heat sink includes a plurality of protrusions, each of which is connected to the aluminum foil layer, and a preset gap is provided between any adjacent protrusions.

[0006] In one of the embodiments, in a direction from the intermediate supporting layer to the aluminum foil layer, the intervals between adjacent protrusions gradually expand.

[0007] In one embodiment, the angle between adjacent protrusions is in the range of 30°-60°.

[0008] In one embodiment, the plurality of protrusions are arranged in an array, and in a first direction, any two adjacent preset gaps are interconnected to form a first guide channel extending along the first direction; in a second direction, any two adjacent preset gaps are interconnected to form a second guide channel extending along the second direction; wherein the first direction intersects with the second direction.

[0009] In one embodiment, the protrusion is pyramid-shaped; or the protrusion is prism-shaped; or the protrusion is an arc-shaped protrusion.

[0010] In one embodiment, each of the protrusions is made of aluminum and is integrally formed with the aluminum foil layer.

[0011] In one of the embodiments, in the arrangement direction of the intermediate support layer and the aluminum foil layer, the height of the protrusion ranges from 10 μm to 20 μm.

[0012] In one embodiment, the material of the intermediate support layer is polyethylene terephthalate; and / or the inner bonding layer includes one of a fluorocarbon resin coating, a polyurethane resin coating, a polyvinylidene fluoride film, a polyvinyl fluoride film, a polyethylene film, a polypropylene film, and a polyolefin film.

[0013] The utility model also provides a photovoltaic component, which can solve at least one of the above technical problems.

[0014] A photovoltaic module comprises the photovoltaic module heat dissipation back plate mentioned above.

[0015] Beneficial effects:

[0016] The photovoltaic module heat dissipation backplane provided by the embodiment of the utility model comprises an aluminum foil layer, an intermediate support layer and an inner bonding layer connected in sequence, the inner bonding layer and the aluminum foil layer are respectively located on both sides of the intermediate support layer, and a heat dissipation element is provided on the side of the aluminum foil layer away from the intermediate support layer. In the present application, the inner bonding layer and the aluminum foil layer are respectively located on both sides of the intermediate support layer, the inner bonding layer is used to bond with the battery sheet in the photovoltaic module, and the aluminum foil layer is used to contact with the air, thereby playing a water-blocking role, and the aluminum foil layer has good thermal conductivity, and can transfer heat to the heat dissipation element arranged on the side of the aluminum foil layer facing the air in time, and dissipate heat through the heat dissipation element, thereby increasing the heat dissipation efficiency of the photovoltaic module heat dissipation backplane.

[0017] The utility model also provides a photovoltaic component, including the photovoltaic component heat dissipation back plate mentioned above, and the photovoltaic component can achieve at least one of the above technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of a photovoltaic module heat dissipation backplane provided in one embodiment of the utility model.

[0019] Figure 2 This is a first schematic diagram of the cooperation between the heat dissipation element and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided by one embodiment of the utility model.

[0020] Figure 3 A second schematic diagram of the cooperation between the heat sink and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided in one embodiment of the utility model.

[0021] Figure 4 A third schematic diagram of the cooperation between the heat sink and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided in one embodiment of the utility model.

[0022] Figure 5A bottom view of a photovoltaic module heat dissipation back plate provided in one embodiment of the utility model.

[0023] Figure Number:

[0024] 100 - aluminum foil layer; 200 - heat sink; 210 - protrusion; 220 - preset gap; 230 - first guide channel; 240 - second guide channel; 300 - middle support layer; 400 - inner bonding layer. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] See also Figure 1 , Figure 1 A side view of a photovoltaic module heat dissipation backplane provided in one embodiment of the utility model. The photovoltaic module heat dissipation backplane provided in one embodiment of the utility model comprises an aluminum foil layer 100, an intermediate support layer 300 and an inner bonding layer 400 connected in sequence, the inner bonding layer 400 and the aluminum foil layer 100 are respectively located on both sides of the intermediate support layer 300, and a heat dissipation member 200 is provided on the side of the aluminum foil layer 100 away from the intermediate support layer 300.

[0032] Specifically, in the present application, the inner bonding layer 400 and the aluminum foil layer 100 are respectively located on both sides of the intermediate support layer 300, the inner bonding layer 400 is used to bond with the cell in the photovoltaic module, and the aluminum foil layer 100 is used to contact with the air, thereby playing a water-blocking role, and the aluminum foil layer 100 has good thermal conductivity, and can transfer heat in time to the heat sink 200 arranged on the side of the aluminum foil layer 100 facing the air, and dissipate heat through the heat sink 200, thereby increasing the heat dissipation efficiency of the heat dissipation backplane of the photovoltaic module.

[0033] See also Figure 1 and Figure 2 , Figure 2 The first schematic diagram of the cooperation between the heat sink and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided by an embodiment of the utility model. In one embodiment, the heat sink 200 includes a plurality of protrusions 210, each of which is connected to the aluminum foil layer 100, and there is a preset gap 220 between any adjacent protrusions 210.

[0034] Specifically, there is a preset gap 220 between any adjacent protrusions 210 , thereby increasing the surface area of ​​the protrusions 210 , that is, increasing the contact area between the protrusions 210 and the air, and improving the heat dissipation efficiency of the heat sink 200 .

[0035] See also Figure 1 and Figure 2 In one of the embodiments, in the direction from the middle support layer 300 to the aluminum foil layer 100, the spacing between adjacent protrusions 210 gradually expands, thereby further increasing the surface area of ​​each protrusion 210 and increasing the size of the preset gap 220 to facilitate airflow, thereby further improving the heat dissipation efficiency of the photovoltaic module heat dissipation backplane.

[0036] See also Figure 1 and Figure 2 In one embodiment, the angle between adjacent protrusions 210 ranges from 30° to 60°, thereby ensuring that the protrusions 210 have a larger surface area while increasing the size of the preset gap 220, thereby facilitating improving the heat dissipation efficiency of the photovoltaic module heat dissipation backplane.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 3 A second schematic diagram of the cooperation between the heat sink and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided in one embodiment of the utility model. Figure 4 A third schematic diagram of the cooperation between the heat sink and the aluminum foil layer in the heat dissipation back plate of a photovoltaic module provided in an embodiment of the utility model. In one embodiment, the protrusion 210 is pyramid-shaped. In another embodiment, the protrusion 210 is prism-shaped. In yet another embodiment, the protrusion 210 is an arc-shaped protrusion. It should be noted that the protrusion 210 can also be other shapes.

[0038] See also Figure 1 , Figure 2 and Figure 5 , Figure 5 A bottom view of a photovoltaic module heat dissipation back plate provided in one embodiment of the utility model. In one embodiment, a plurality of protrusions 210 are arranged in an array, and in a first direction, any two adjacent preset gaps 220 are interconnected to form a first guide channel 230 extending along the first direction; in a second direction, any two adjacent preset gaps 220 are interconnected to form a second guide channel 240 extending along the second direction; wherein the first direction intersects with the second direction.

[0039] Specifically, in the first direction, any two adjacent preset gaps 220 are interconnected to form a first guide channel 230 extending along the first direction, so as to facilitate the flow of air between adjacent preset gaps 220 and facilitate exchange with external airflow for heat dissipation. The direction of the heat dissipation back plate of the photovoltaic module can be adjusted according to the meteorological conditions of the project site, so that the first direction corresponds to the flow direction of the airflow in the air, so as to further increase the speed of the airflow flowing in the first guide channel 230 and improve the heat dissipation efficiency of the heat dissipation back plate of the photovoltaic module.

[0040] In the second direction, any two adjacent preset gaps 220 are interconnected to form a second guide channel 240 extending along the second direction, so as to facilitate the flow of air between adjacent preset gaps 220 and facilitate exchange with external airflow for heat dissipation. The direction of the photovoltaic module heat dissipation back plate can be adjusted according to the meteorological conditions of the project site, so that the second direction corresponds to the flow direction of the airflow in the air, so as to further increase the speed of the airflow flowing in the second guide channel 240 and improve the heat dissipation efficiency of the photovoltaic module heat dissipation back plate.

[0041] In this embodiment, the angle between the first direction and the second direction is 90 degrees. In other embodiments, the angle between the first direction and the second direction may also be 45 degrees or 30 degrees.

[0042] It should be noted that the instructions are attached Figure 5 For example, the first direction is parallel to the width direction of the photovoltaic module back plate, and the second direction is parallel to the length direction of the photovoltaic module back plate.

[0043] See also Figure 1 , Figure 2 and Figure 5 In one embodiment, each protrusion 210 is made of aluminum and is integrally formed with the aluminum foil layer 100 .

[0044] Specifically, aluminum has good thermal conductivity, which can further improve the heat dissipation efficiency of the heat sink 200. The integrated arrangement of the protrusions 210 and the aluminum foil layer 100 can facilitate the processing of the photovoltaic module heat dissipation backplane, and can facilitate the heat conduction of the aluminum foil layer 100, thereby further improving the heat dissipation efficiency of the photovoltaic module heat dissipation backplane.

[0045] Compared with the prior art method of setting other layers on the side of the aluminum foil layer 100 away from the intermediate support layer 300, such as a weather-resistant layer, the present application allows the aluminum foil layer 100 to directly contact the air, thereby avoiding the weather-resistant layer from hindering the direct contact between the aluminum foil layer 100 and the air, thereby improving the heat dissipation efficiency of the photovoltaic module heat dissipation backplane.

[0046] See also Figure 1 and Figure 2 In one embodiment, in the arrangement direction of the intermediate support layer 300 and the aluminum foil layer 100, the height range of the protrusion 210 is 10μm-20μm, thereby reducing the impact of the protrusion 210 being too thick on thermal conductivity, and also reducing the impact of the protrusion 210 being too thin and having too little contact area with the air.

[0047] See also Figure 1 In one embodiment, the material of the middle support layer 300 is polyethylene terephthalate, so that the heat generated by the photovoltaic module can be evenly dispersed on the surface of the aluminum foil layer 100 through the polyethylene terephthalate, and the aluminum foil layer 100 is fully in contact with the air through the protrusions 210 on the surface of the aluminum foil layer 100, so that the heat can be fully dissipated into the air.

[0048] See also Figure 1 In one embodiment, the inner bonding layer 400 includes one of a fluorocarbon resin coating, a polyurethane resin coating, a polyvinylidene fluoride film, a polyvinyl fluoride film, a polyethylene film, a polypropylene film, and a polyolefin film.

[0049] See also Figure 1 In one embodiment, the aluminum foil layer 100 may have a thickness of 20-60 μm. In one embodiment, the intermediate support layer 300 may have a thickness greater than 300 μm. In one embodiment, the inner bonding layer 400 may have a thickness of 6-60 μm.

[0050] The embodiment of the utility model also provides a photovoltaic module, including the above-mentioned photovoltaic module heat dissipation backplane. In the present application, the inner adhesive layer 400 and the aluminum foil layer 100 are respectively located on both sides of the intermediate support layer 300, the inner adhesive layer 400 is used to bond with the battery cell in the photovoltaic module, and the aluminum foil layer 100 is used to contact with the air, thereby playing a water-blocking role, and the aluminum foil layer 100 has good thermal conductivity, and can transfer heat to the heat sink 200 arranged on the side of the aluminum foil layer 100 facing the air in time, and dissipate heat through the heat sink 200, thereby increasing the heat dissipation efficiency of the photovoltaic module heat dissipation backplane, so as to increase the photoelectric conversion efficiency of the battery cell of the photovoltaic module.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A photovoltaic module heat dissipation backplane, characterized in that: The photovoltaic module heat dissipation backplane includes an aluminum foil layer, an intermediate support layer and an inner bonding layer connected in sequence. The inner bonding layer and the aluminum foil layer are respectively located on both sides of the intermediate support layer. A heat dissipation component is provided on the side of the aluminum foil layer away from the intermediate support layer.

2. The photovoltaic module heat dissipation back plate according to claim 1, characterized in that: The heat sink includes a plurality of protrusions, each of which is connected to the aluminum foil layer, and a preset gap is provided between any adjacent protrusions.

3. The photovoltaic module heat dissipation back plate according to claim 2, characterized in that: In a direction from the intermediate supporting layer to the aluminum foil layer, the intervals between adjacent protrusions gradually expand.

4. The photovoltaic module heat dissipation back plate according to claim 3, characterized in that: The angle between adjacent protrusions ranges from 30° to 60°.

5. The photovoltaic module heat dissipation back plate according to claim 2, characterized in that: The plurality of protrusions are arranged in an array, and in a first direction, any two adjacent preset gaps are connected to each other to form a first guide channel extending along the first direction; In the second direction, any two adjacent preset gaps are connected to each other to form a second guide channel extending along the second direction; The first direction intersects the second direction.

6. The photovoltaic module heat dissipation back plate according to any one of claims 2 to 5, characterized in that: The protrusion is pyramid-shaped; or the protrusion is prism-shaped; or the protrusion is an arc-shaped protrusion.

7. The photovoltaic module heat dissipation back plate according to any one of claims 2 to 5, characterized in that: Each of the protruding parts is made of aluminum and is integrally formed with the aluminum foil layer.

8. The photovoltaic module heat dissipation back plate according to any one of claims 2 to 5, characterized in that: In the arrangement direction of the intermediate support layer and the aluminum foil layer, the height of the protrusion ranges from 10 μm to 20 μm.

9. The photovoltaic module heat dissipation back plate according to any one of claims 1 to 5, characterized in that: The material of the intermediate support layer is polyethylene terephthalate; and / or the inner adhesive layer includes one of a fluorocarbon resin coating, a polyurethane resin coating, a polyvinylidene fluoride film, a polyvinyl fluoride film, a polyethylene film, a polypropylene film, and a polyolefin film.

10. A photovoltaic module, characterized in that: A photovoltaic module heat dissipation back plate comprising any one of claims 1 to 9.

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