Photovoltaic photo-thermal assembly of checkered plate type heat absorbing plate

Abstract

The utility model discloses a photovoltaic photo-thermal assembly of a checkered plate type heat absorbing plate, which comprises a laminated assembly, the laminated assembly comprises an upper glass plate, a first adhesive layer, a battery piece, a second adhesive layer, a back plate, a third adhesive layer and a heat absorbing plate in sequence from top to bottom, and a heat absorbing flow channel is arranged below the heat absorbing plate. A plurality of convex faces are arranged on the side, facing the heat absorption flow channel, of the heat absorption plate, the convex faces are distributed on the heat absorption plate in an array staggered mode, grooves communicated with each other are formed between the adjacent convex faces, and a frame is arranged on the outer side of the lamination assembly and the outer side of the heat absorption flow channel in a surrounding mode. When the photovoltaic photo-thermal assembly is used, the heat absorbing plate is designed into a checkered plate type, namely a convex surface and groove staggered arrangement form, and the heat absorbing plate is divided into a plurality of independent thermal expansion units, so that the stress concentration of the whole heat absorbing plate is eliminated, and the problems of bending deformation of a laminated assembly and subfissure of a battery piece are avoided.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic and solar thermal equipment technology, specifically to a photovoltaic and solar thermal component with a patterned plate heat absorber. Background Technology

[0002] Photovoltaic-thermal integrated panels achieve the dual functions of power generation and hot water production. They not only improve the power generation efficiency of photovoltaic modules but also provide hot water, greatly enhancing the utilization efficiency of solar energy. However, existing photovoltaic-thermal integrated panels still have the following problems:

[0003] 1. Insufficient thermal conductivity and cost issues: In traditional solutions, photovoltaic modules and heat absorbers are bonded together using thermally conductive adhesive. However, the application of thermally conductive adhesive is labor-intensive and material-intensive, the adhesive layer is uneven, and the thermal conductivity is low, which limits the heat transfer efficiency and fails to fully realize the thermal energy potential of photovoltaic modules.

[0004] 2. Risk of Structural Deformation and Microcracks: In integrated laminated photovoltaic thermal modules, the linear expansion coefficients of the absorber plate and the upper glass plate differ significantly. When the temperature changes, the stress difference between the two materials due to thermal expansion and contraction can easily lead to lateral or longitudinal bending deformation of the laminated module, which in turn can cause microcracks in the cells, severely affecting the reliability and lifespan of the module.

[0005] 3. Limitations of segmented structures: To alleviate deformation problems, existing technologies attempt to divide the entire heat absorption plate into multiple segments. However, if the number of segments is too small, deformation cannot be completely avoided, while increasing the number of segments significantly increases manufacturing costs, limiting the product's economic viability and promotional value.

[0006] Therefore, it is necessary to provide a photovoltaic thermal module with a patterned plate heat absorber to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a photovoltaic thermal module with a patterned plate heat absorber, which avoids bending deformation of the heat absorber and microcracks in the solar cells.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A photovoltaic thermal module with a patterned heat-absorbing plate includes a laminated module. The laminated module comprises, from top to bottom, an upper glass plate, a first adhesive layer, a solar cell, a second adhesive layer, a back sheet, a third adhesive layer, and a heat-absorbing plate. A heat-absorbing channel is provided below the heat-absorbing plate. A plurality of convex surfaces are provided on the side of the heat-absorbing plate facing the heat-absorbing channel. The convex surfaces are arranged in an alternating array on the heat-absorbing plate. Interconnected grooves are provided between adjacent convex surfaces. A frame is provided around the outer side of the laminated module and the heat-absorbing channel.

[0010] Preferably, the backplate is a glass plate, a TPT plate, or a KPK plate.

[0011] Preferably, the first adhesive layer is a transparent EVA layer, the second adhesive layer is an EVA layer or a POE layer, and the third adhesive layer is an EVA layer or a POE layer.

[0012] Preferably, the groove depth is greater than 0.5 times the thickness of the heat absorber plate, and a corresponding protrusion is formed on the other side of the heat absorber plate. The maximum straight length L1 of the convex side is less than 200 mm, the maximum straight length L2 of the groove is less than 200 mm, and the total area of ​​the top surface of the convex side of the heat absorber plate is greater than four times the total area of ​​the bottom surface of the groove of the heat absorber plate.

[0013] Preferably, the heat-absorbing plate is a thin cold-rolled metal plate, including a thin cold-rolled aluminum plate, a thin cold-rolled iron plate, or a thin cold-rolled stainless steel plate, and the thickness of the heat-absorbing plate is 0.2-1mm. The convex surface includes rectangular, circular, irregular, or combinations thereof.

[0014] Preferably, the heat absorption channel and the convex surface of the heat absorption plate are directly fixed or connected and fixed by an Ω-shaped pressure strip. The Ω-shaped pressure strip includes a tube groove with an Ω-shaped cross section and symmetrical pressure edges on the left and right sides of the tube groove. The tube groove is used to fix the heat absorption channel, and the pressure edges are used to connect and fix with the convex surface of the heat absorption plate.

[0015] Preferably, thermally conductive adhesive is applied between the pressing edge and the convex surface of the heat absorber plate, and thermally conductive adhesive is filled between the inner wall of the tube groove and the heat absorber channel.

[0016] Preferably, a heat-absorbing layer is provided below the heat-absorbing channel. The heat-absorbing layer is located inside the frame. The heat-absorbing layer is a heat-insulating board, an aerogel layer, or heat-insulating cotton. The outer surface of the heat-insulating cotton is wrapped with a metal shell.

[0017] Preferably, the heat absorption channel is an S-shaped channel or a grid-shaped channel.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] 1. Improved structural stability and deformation resistance of laminated modules: The heat absorption plate is designed as a patterned plate, that is, the convex surface and the groove are arranged alternately. The heat absorption plate is divided into multiple independent thermal expansion units. The thermal expansion and contraction of each unit are isolated, eliminating the stress concentration of the heat absorption plate as a whole, thereby avoiding the problems of bending deformation of laminated modules and microcracks of solar cells.

[0020] 2. Reduced production costs: The heat absorption plate is designed as a patterned plate, which can achieve deformation control without physical segmentation, reducing the difficulty of processing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the heat absorber plate.

[0022] Figure 2 This is a side view of the laminating assembly in Example 1;

[0023] Figure 3 This is a side view of the photovoltaic thermal module as a whole in Example 1;

[0024] Figure 4 This is an assembly diagram of the heat absorption channel installed on the heat absorption plate;

[0025] Figure 5 This is a side view of the laminating assembly in Example 2;

[0026] Among them, 1-laminated assembly, 101-upper glass plate, 102-first adhesive layer, 103-battery cell, 104-second adhesive layer, 105-backsheet, 106-third adhesive layer, 107-heat absorber plate, 1071-convex surface, 1072-groove, 2-heat absorber channel, 3-Ω-shaped pressure strip, 4-thermal conductive adhesive, 5-insulation board, 6-frame Detailed Implementation

[0027] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixed connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, terms such as "upper", "lower", "bottom", and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

[0030] Example 1, as Figures 1 to 4As shown, a photovoltaic thermal module with a patterned heat absorber plate includes a laminated module 1. The laminated module, from top to bottom, includes an upper glass plate 101, a first adhesive layer 102, solar cells 103, a second adhesive layer 104, a backsheet 105, a third adhesive layer 106, and a heat absorber plate 107. The backsheet is made of TPT board, the first adhesive layer is a transparent EVA layer, and the second and third adhesive layers are both POE layers. The heat absorber plate is made of a thin cold-rolled aluminum plate with a thickness of 0.2mm. An S-shaped heat absorption channel 2 is provided below the heat absorber plate. Several cross-shaped and rectangular convex surfaces are provided on the side of the heat absorber plate facing the heat absorption channel. The cross-shaped and rectangular convex surfaces are arranged in an alternating array on the heat absorber plate. Interconnected grooves 1072 are provided between adjacent convex surfaces 1071. The groove depth is greater than 0.5 times the thickness of the heat absorber plate, and corresponding protrusions are formed on the other side of the heat absorber plate. The convex surfaces are at their outermost edges... The maximum straight length L1 is less than 200mm, the maximum straight length L2 of the groove is less than 200mm, and the total area of ​​the top surface of all the convex surfaces of the heat absorber plate is more than four times the total area of ​​the bottom surface of the groove of the heat absorber plate, ensuring sufficient heat conduction area and ensuring the heat conduction efficiency of the heat absorber plate. The heat absorber channel and the convex surface of the heat absorber plate are connected and fixed by an Ω-shaped pressure strip 3. The Ω-shaped pressure strip includes a tube groove with an Ω-shaped cross section. Symmetrical pressure edges are provided on the left and right sides of the tube groove. The tube groove is used to fix the heat absorber channel, and the pressure edges are used to connect with the convex surface of the heat absorber plate. The pressure edges can be directly welded to the convex surface of the heat absorber plate by an ultrasonic linear welding machine, or they can be fixed by applying thermally conductive adhesive between the pressure edges and the convex surface of the heat absorber plate. When using thermally conductive adhesive for fixing, thermally conductive adhesive 4 is filled between the inner wall of the tube groove and the heat absorber channel. A heat insulation board 5 is provided below the heat absorber channel, and a frame 6 is provided around the outer side of the laminated component, the heat absorber channel and the heat insulation board.

[0031] Example 2, as Figure 5 As shown, a photovoltaic thermal module with a patterned plate heat absorber can be composed of an upper glass plate 101, a first adhesive layer 102, a solar cell 103, a second adhesive layer 104, and a heat absorber plate 107 from top to bottom, thus eliminating the need for a back sheet. The heat absorber plate and the heat absorption channel can also be directly fixed by laser welding.

[0032] Taking Example 1 as an example, the principle of a photovoltaic thermal module with a patterned heat absorber is as follows: The laminated component of the photovoltaic thermal module includes, from top to bottom, an upper glass plate, a first adhesive layer, a solar cell, a second adhesive layer, a back sheet, a third adhesive layer, and a heat absorber. The heat absorber is designed with a patterned pattern, that is, a cross-shaped concave surface, a rectangular concave surface, and grooves are arranged alternately, dividing the heat absorber into multiple independent thermal expansion units. The thermal expansion and contraction of each unit are isolated, eliminating the stress concentration of the heat absorber as a whole. This prevents bending deformation and microcracks in the solar cells when the laminated component is laminated by a photovoltaic panel laminator. The heat absorption channel is then connected and fixed to the convex surface of the heat absorber through an Ω-shaped pressure strip, ensuring the heat conduction efficiency of the heat absorber to the heat absorption channel. This structure reduces the assembly difficulty and production cost of the photovoltaic thermal module.

[0033] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A photovoltaic thermal module with a patterned plate heat-absorbing panel, characterized in that: The assembly includes a laminated component, which, from top to bottom, comprises an upper glass plate, a first adhesive layer, a battery cell, a second adhesive layer, a back sheet, a third adhesive layer, and a heat-absorbing plate. The heat-absorbing plate has a heat-absorbing channel below it, and a plurality of convex surfaces are provided on the side of the heat-absorbing plate facing the heat-absorbing channel. The convex surfaces are arranged in an alternating array on the heat-absorbing plate, and grooves are provided between adjacent convex surfaces. A frame is provided around the outer side of the laminated component and the heat-absorbing channel.

2. The photovoltaic thermal module of a patterned plate heat absorber according to claim 1, characterized in that: The back panel is a glass plate, a TPT plate, or a KPK plate.

3. The photovoltaic thermal module of a patterned plate heat absorber according to claim 1, characterized in that: The first adhesive layer is a transparent EVA layer, the second adhesive layer is an EVA layer or a POE layer, and the third adhesive layer is an EVA layer or a POE layer.

4. The photovoltaic thermal module of a patterned plate heat absorber according to claim 1, characterized in that: The groove depth is greater than 0.5 times the thickness of the heat absorber plate, and a corresponding protrusion is formed on the other side of the heat absorber plate. The maximum straight length L1 of the protrusion is less than 200mm, the maximum straight length L2 of the groove is less than 200mm, and the total area of ​​the top surface of the protrusion of the heat absorber plate is greater than four times the total area of ​​the bottom surface of the groove of the heat absorber plate.

5. A photovoltaic thermal module with a patterned plate heat absorber according to claim 1, characterized in that: The heat-absorbing plate is a thin cold-rolled metal plate, including thin cold-rolled aluminum plate, thin cold-rolled iron plate or thin cold-rolled stainless steel plate. The thickness of the heat-absorbing plate is 0.2-1mm. The convex surface includes rectangular, circular, irregular, or combinations thereof.

6. A photovoltaic thermal module with a patterned plate heat absorber according to claim 1, characterized in that: The heat absorption channel and the convex surface of the heat absorption plate are directly fixed or connected and fixed by an Ω-shaped pressure strip. The Ω-shaped pressure strip includes a tube groove with an Ω-shaped cross section. Symmetrical pressure edges are provided on the left and right sides of the tube groove. The tube groove is used to fix the heat absorption channel, and the pressure edges are used to connect and fix with the convex surface of the heat absorption plate.

7. A photovoltaic thermal module with a patterned plate heat absorber according to claim 6, characterized in that: Thermally conductive adhesive is applied between the pressure edge and the convex surface of the heat absorber plate, and thermally conductive adhesive is filled between the inner wall of the tube groove and the heat absorber channel.

8. A photovoltaic thermal module with a patterned plate heat absorber according to claim 1, characterized in that: A heat-absorbing flow channel is provided below the heat-insulating layer, which is located inside the frame. The heat-insulating layer is a heat-insulating board, an aerogel layer, or heat-insulating cotton, and the outer surface of the heat-insulating cotton is wrapped with a metal shell.

9. A photovoltaic thermal module with a patterned plate heat absorber according to claim 1, characterized in that: The heat absorption channel is an S-shaped channel or a grid-shaped channel.

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