Photovoltaic module frame and photovoltaic device

Abstract

The invention discloses a photovoltaic module frame and a photovoltaic device, and the photovoltaic module frame comprises a cooling pipeline which is internally provided with a liquid cooling channel; the at least one evaporation pipeline is internally provided with at least one heat pipe for accommodating a heat exchange working medium, and the two ends of the heat pipe are closed ends and respectively penetrate through the side wall of the cooling pipeline to extend into the liquid cooling channel so as to form two condensation ends; and the heat-conducting insulating layer is arranged on the surface of the evaporation pipeline and is used for bearing and cooling the battery unit. According to the invention, high-efficiency heat transfer can be realized, so that the battery unit is rapidly cooled.

Description

Technical Field

[0001] This application relates to the field of microfabrication technology, and more particularly to a photovoltaic module frame and a photovoltaic device. Background Art

[0002] Photovoltaic technology, as a low-carbon and environmentally friendly power generation technology, has received wide attention. Concentrated photovoltaics (CPV) technology uses relatively inexpensive concentrating optical elements to focus sunlight onto smaller photovoltaic cells. In a CPV system, the conversion efficiency of a triple-junction solar cell is about 36%. However, the energy that is not converted into electrical energy is stored in the battery in the form of heat. If this part of the heat is not dissipated to the environment in time, it will cause the battery performance to decay. Moreover, as the concentration ratio increases, the battery will withstand more heat, resulting in a significant decrease in the conversion efficiency of CPV cells and even irreversible failures. Therefore, designing a novel heat dissipation structure to eliminate excess heat is crucial for maintaining the performance of the battery. Summary of the Invention

[0003] In view of the above technical problems, this application provides a photovoltaic module frame and a photovoltaic device, which can improve the problem that the existing CPV cells have a decrease in conversion efficiency or even irreversible failures due to low heat dissipation efficiency.

[0004] To solve the above technical problems, in a first aspect, an embodiment of this application provides a photovoltaic module frame, including:

[0005] A cooling pipe, in which a liquid cooling channel is provided;

[0006] At least one evaporation pipe, in which at least one heat pipe for accommodating a displacement heat transfer medium is provided. Both ends of the heat pipe are closed ends and respectively penetrate through the side wall of the cooling pipe and extend into the liquid cooling channel to form two condensation ends;

[0007] A thermally conductive insulating layer, which is arranged on the surface of the evaporation pipe and is used to carry and cool the battery unit.

[0008] Optionally, the surface of the heat pipe facing the thermally conductive insulating layer is a flat surface.

[0009] Optionally, a first air channel is further provided in the cooling pipe;

[0010] A second air channel communicating with the first air channel is further provided in the evaporation pipe.

[0011] Optionally, a seal is provided at the connection between the evaporation pipe and the cooling pipe.

[0012] Optionally, the thermally conductive insulating layer includes an adhesive and a thermally conductive filler.

[0013] Optionally, the adhesive is selected from at least one of epoxy resin, polyvinyl butyral, phenolic resin, polyimide resin, polyethylene terephthalate, and polyphenylene ether; and / or,

[0014] The heat-conducting filler is selected from Al 2 O 3 , MgO, ZnO, BeO, BN, Si 3 N 4 and at least one of AlN.

[0015] Optionally, the cooling pipe includes:

[0016] At least two first cooling pipes arranged parallel to the first direction, and the outermost two first cooling pipes are respectively provided with a liquid inlet and a liquid outlet;

[0017] At least one second cooling pipe arranged parallel to the second direction, the second cooling pipe is connected to all the first cooling pipes, and is configured such that liquid flows in from the liquid inlet, and after flowing through all the first cooling pipes and the second cooling pipe, flows out from the liquid outlet, wherein the second direction is perpendicular to the first direction;

[0018] The at least one evaporation pipe is arranged parallel to the second direction, the evaporation pipe is arranged between two adjacent first cooling pipes, and the condensation ends respectively extend into the corresponding liquid cooling channels.

[0019] Optionally, the second cooling pipe and the evaporation pipe are alternately arranged along the first direction.

[0020] In a second aspect, the present application further provides a photovoltaic device, including a battery unit, and a photovoltaic module frame as described in each of the above embodiments;

[0021] The battery unit is arranged on the heat-conducting insulating layer.

[0022] Optionally, the photovoltaic device further includes:

[0023] An encapsulation layer for encapsulating the battery unit.

[0024] Optionally, the encapsulation layer is a silicone layer or an epoxy resin layer.

[0025] As described above, for the photovoltaic module frame of the present application, the heat pipe in the evaporation pipe can be pre-filled with a heat exchange working fluid. When the battery unit operates, the heat generated is conducted to the evaporation pipe through the thermally conductive insulating layer. The heat exchange working fluid inside the heat pipe absorbs heat and vaporizes, causing the vapor pressure to rise. Due to the pressure difference, the heat exchange working fluid gas flows towards the two cooler condensation ends. Since the liquid cooling channel of the cooling pipe circulates the cooling medium, when the cooling medium flows through the two condensation ends, it can cool the two condensation ends. The heat exchange working fluid gas releases latent heat upon condensation at the condensation ends and re-condenses into a heat exchange working fluid liquid. The heat exchange working fluid liquid returns to the evaporation section (the area where the heat exchange working fluid can vaporize between the two condensation ends) by virtue of the suction force provided by the capillary structure. Such a cycle can achieve efficient heat transfer and rapidly cool the battery unit. In the present application, the thermally conductive insulating layer is filled between the battery unit and the evaporation pipe, which can prevent gaps between the battery unit and the evaporation pipe, and when there are multiple heat pipes, prevent gaps between the multiple heat pipes, improve the contact between the battery unit and the heat pipes, establish an effective heat transfer channel, reduce the interfacial contact thermal resistance, and maximize the heat dissipation effect. Description of the Drawings

[0026] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application. To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of a photovoltaic module frame provided by an embodiment of the present application;

[0028] Figure 2 is along Figure 1 the cross-sectional structural diagram taken along line A-A in

[0029] Figure 3 is along Figure 1 the cross-sectional structural diagram taken along line B-B in

[0030] Figure 4 is a schematic cooling principle diagram of a photovoltaic module frame provided by an embodiment of the present application;

[0031] Figure 5 is a schematic structural diagram of some other photovoltaic module frames provided by an embodiment of the present application;

[0032] Figure 6 is along Figure 1 the cross-sectional structural diagram taken along line C-C in

[0033] Figure 7 is a schematic cross-sectional structure diagram along Figure 1 the D-D line in

[0034] Figure 8 is a schematic cross-sectional structure diagram along Figure 1 the E-E line in

[0035] Figure 9 is a schematic structural diagram of a photovoltaic device provided by an embodiment of the present application.

[0036] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Through the above-mentioned accompanying drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] As described above, if the CPV battery cannot dissipate heat in time, its conversion efficiency will decrease significantly, and even irreversible failures will occur. As an improved solution, heat pipes and heat dissipation fins can be designed behind the battery cells for heat dissipation, and the heat dissipation fins are used to expand the heat dissipation area and increase the heat dissipation capacity. However, in high-concentration photovoltaic systems, the area of the triple-junction battery is only about 1 cm 2 or so, but the temperature can be as high as over 200 °C, and it is very difficult to dissipate heat through the heat dissipation fins in time, so the improvement effect is limited. As another improved solution, a heat sink can be added to the back of the battery cell, and the heat pipes and fins are used for heat dissipation. However, the heat conduction capacity of the heat sink is limited, and it is also difficult to transfer the heat of the battery to the evaporation section of the heat pipe in time. Moreover, the battery cell is directly in contact with the heat sink, which has the risk of short circuit of the battery cell. In addition, a photovoltaic module contains multiple battery cells. If the above-mentioned heat dissipation devices are designed at the back end of each battery cell, the overall volume of the photovoltaic module will increase, the weight will increase, and it will not be convenient for the subsequent installation of the bracket, so it is not practically feasible. Based on this, the present application provides a photovoltaic module frame and a photovoltaic device.

[0039] Please refer to Figures 1 - 3 , Figure 1 is a schematic structural diagram of a photovoltaic module frame provided by an embodiment of the present application, Figure 2 is along Figure 1Schematic cross-sectional structure diagram along line A-A in Figure 3 is the schematic cross-sectional structure diagram along Figure 1 line B-B in

[0040] The cooling pipe 10 is provided with a liquid cooling channel 101, and the evaporation pipe 20 is provided with at least one heat pipe 201 for containing a displacement heat transfer working fluid. Figure 3 In

[0041] Exemplarily, the battery unit 50 may include a circuit layer 51 and battery chips 52 disposed on and electrically connected to the circuit layer 51. A plurality of battery units 50 may be provided, and a parallel, series, or series-parallel structure may be formed through the circuit layer 51. The circuit layer 51 preferably uses a metal material with good electrical conductivity, such as copper, gold, silver, etc.

[0042] The working principle of the photovoltaic module frame in this embodiment is as follows: The heat transfer working fluid is pre-loaded into the heat pipe 201 in the evaporation pipe 20. When the battery unit 50 works, the heat generated is conducted to the evaporation pipe 20 through the heat-conducting insulating layer 30. The heat transfer working fluid inside the heat pipe 201 vaporizes due to heat absorption, and the vapor pressure rises. Due to the pressure difference, the heat transfer working fluid gas flows towards the two cooler condensation ends 21. Since the liquid cooling channel 101 of the cooling pipe 10 circulates the cooling medium, when the cooling medium flows through the two condensation ends 21, the two condensation ends 21 can be cooled. The heat transfer working fluid gas condenses and releases latent heat at the condensation ends 21, and re-condenses into a heat transfer working fluid liquid. The heat transfer working fluid liquid returns to the evaporation section (the area where the heat transfer working fluid can vaporize between the two condensation ends 21) by virtue of the suction force provided by the capillary structure. Such a cycle can achieve efficient heat transfer and cool the battery unit 50.

[0043] In this embodiment, the heat-conducting insulating layer 30 is filled between the battery unit 50 and the evaporation pipe 20, which can prevent gaps between the battery unit 50 and the evaporation pipe 20, and when there are multiple heat pipes 201, prevent gaps between the multiple heat pipes 201, improve the contact between the battery unit 50 and the heat pipe 201, establish an effective heat transfer channel, reduce the interfacial contact thermal resistance, and maximize the heat dissipation effect.

[0044] In one embodiment, please continue to refer toFigure 3 On the surface of the evaporation pipe 20 close to the battery cell 50, there is a groove 22 for accommodating the heat-conducting insulating layer 30 and the battery cell 50, which can prevent the heat-insulating layer 30 and the battery cell 50 from protruding out of the evaporation pipe 20. At the same time, it is also beneficial for the heat-conducting insulating layer 30 to be shaped in the groove 22 and for the positioning and installation of the battery cell 50.

[0045] In one embodiment, please continue to refer to Figure 3 One side of the heat pipe 201 facing the heat-conducting insulating layer 30 is a flat surface. In the figure, the top surfaces of the three heat pipes 201 are all flat surfaces, which can increase the contact area between the heat-conducting insulating layer 30 and the heat pipe 201 and improve the heat dissipation efficiency. In other embodiments, the heat pipe 201 can also be a flat pipe.

[0046] In one embodiment, please refer to Figures 2 - 4 In the cooling pipe 10, there is also a first air channel 102, and in the evaporation pipe 20, there is also a second air channel 202 communicated with the first air channel 102. The cooling medium flows in from the liquid inlet 111 of the cooling pipe 10 and flows out from the liquid discharge port 112 to cool the condensation end 21. Air can flow in / out from the first air vent 113 and flow out / in from the second air vent 114 to directly cool the battery cell 50. In this embodiment, by setting air channels in the photovoltaic module frame, the battery cell 50 can perform passive heat dissipation, further improving the heat dissipation efficiency. When working,

[0047] In one embodiment, please continue to refer to Figure 2 At the connection between the evaporation pipe 20 and the cooling pipe 10, there is a seal 40. Specifically, the cooling end 21 of the evaporation pipe 20 passes through the side wall of the cooling pipe 10 and extends into the cooling pipe 10 to be cooled by the cooling medium to form the condensation end 21. The seal 40 can form a good seal at the connection to prevent the cooling medium from leaking out of the cooling pipe 10. Exemplarily, the seal 40 can be an elastic sealing ring.

[0048] In one embodiment, the heat-conducting insulating layer 30 can include an adhesive and a heat-conducting filler. The adhesive can play a role in connecting the evaporation pipe 20 and the battery cell 50, and the heat-conducting filler can improve the heat conduction ability of the heat-conducting insulating layer 30.

[0049] As some examples, the adhesive can be selected from at least one of epoxy resin, polyvinyl butyral, phenolic resin, polyimide resin, polyethylene terephthalate, and polyphenylene ether. The heat-conducting filler can be selected from at least one of Al 2 O 3 , MgO, ZnO, BeO, BN, Si 3 N 4 and AlN.

[0050] It should be noted that for the specific shapes of the cooling pipe 10 and the evaporation pipe 20 in the photovoltaic module frame of the embodiments of the present application, no special limitations are imposed. Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of some other photovoltaic module frames provided by the embodiments of the present application. Among them, in Example (a), the cooling pipe 10 is a bent pipe and the evaporation pipe 20 is a straight pipe. In Example (b), the cooling pipe 10 is a straight pipe and the evaporation pipe 20 is a bent pipe. In other embodiments, the cooling pipe 10 and the evaporation pipe 20 can both be bent pipes or straight pipes, or other shapes. In addition, the number of the cooling pipe 10 and the evaporation pipe 20 is not limited in the embodiments of the present application either, and can be selected according to actual needs. According to the inventive concept of the present application, the object of the present invention can be achieved.

[0051] As an example, please continue to refer to Figure 1 , the cooling pipe 10 may include: at least two first cooling pipes arranged parallel to the first direction X, at least one second cooling pipe arranged parallel to the second direction Y, and at least one evaporation pipe 20.

[0052] Taking three first cooling pipes 11A, 11B, 11C, three second cooling pipes 12A, 12B, 12C, and four evaporation pipes 20 as an example, the two outermost first cooling pipes 11A and 11C are respectively provided with a liquid inlet 111 and a liquid outlet 112. During operation, the liquid inlet 111 and the liquid outlet 112 can be connected to a chiller through a hose to ensure the stability of the water temperature in the liquid cooling channel 101 of the cooling pipe 10 and its circulating flow. The second cooling pipes 12A, 12B, 12C are connected to all the first cooling pipes and are configured such that the liquid flows in from the liquid inlet 111, and after flowing through all the first cooling pipes and the second cooling pipes, flows out from the liquid outlet 112, as shown by the arrows in the figure, where the second direction Y is perpendicular to the first direction X. The evaporation pipe 20 is arranged parallel to the second direction Y, the evaporation pipe 20 is arranged between two adjacent first cooling pipes, and the condensation ends 21 of the evaporation pipe 20 respectively extend into the corresponding liquid cooling channels 101.

[0053] Specifically, a through hole can be opened on the right side of the left first cooling pipe 11A, and the condensation end 21 on the left side of the left evaporation pipe 20 extends into the liquid cooling channel 101 through this through hole, as shown in Figure 1 and Figure 2 . A through hole can be opened on the left side of the right first cooling pipe 11C, and the condensation end 21 on the right side of the right evaporation pipe 20 extends into the liquid cooling channel 101 through this through hole, as shown in Figure 1 and Figure 6As shown, through holes can be respectively formed on the left and right sides of the first cooling pipe 11B in the middle. The condensation end 21 on the right side of the evaporation pipe 20 on the left extends into the liquid cooling channel 101 through the through hole on the left, and the condensation end 21 on the left side of the evaporation pipe 20 on the right extends into the liquid cooling channel 101 through the through hole on the right, as Figure 1 and Figure 7 shown. The entire photovoltaic module frame forms a regular rectangular frame. As an example, please refer to Figure 8 , and all three second cooling pipes can include the liquid cooling channel 101 and the first air channel 102 at the same time.

[0054] Furthermore, the second cooling pipes and the evaporation pipes 20 can be alternately arranged along the first direction X. For example, please refer to Figure 1 , evaporation pipes 20 are respectively arranged between the second cooling pipe 12A and the second cooling pipe 12B, and between the second cooling pipe 12B and the second cooling pipe 12C. By arranging at intervals, better cooling can be performed on the condensation end 21 of the evaporation pipe 20, and the cooling efficiency of the photovoltaic module frame for the battery unit 50 can be improved.

[0055] The embodiment of the present application also provides a photovoltaic device. Please refer to Figure 1 and Figure 9 , Figure 9 is a schematic structural diagram of a photovoltaic device provided by the embodiment of the present application. The photovoltaic device can include a battery unit 50 and a photovoltaic module frame as described in the above embodiments. The battery unit 50 is arranged on the thermally conductive insulating layer 30. Posts 70 can also be respectively arranged at the four corners of the photovoltaic module frame, and the Fresnel lens array 80 is arranged above the photovoltaic module frame through the posts 70 to focus light on each battery unit 50.

[0056] In one embodiment, please refer to Figure 3 , the photovoltaic module frame can further include a packaging layer 60. The packaging layer 60 is used to package the battery unit 50 to prevent damage to the battery unit 50 caused by temperature and humidity during outdoor operation. As some examples, the packaging layer 60 can be a silicone layer or an epoxy resin layer. Preferably, the packaging layer 60 can fill the aforementioned groove 22.

[0057] For other working principles and processes of the photovoltaic device, refer to the description of the photovoltaic module frame in the foregoing embodiments of the present invention, which will not be elaborated here.

[0058] Next, an experiment is conducted on the photovoltaic module frame shown in Figure 1 to further illustrate the present application.

[0059] Comparative Example 1

[0060] Put Figure 1Replace the photovoltaic module frame shown with solid aluminum of the same size. Connect 4 battery strings in parallel and then conduct electricity, and fix them on the aluminum. Under the conditions of 500 times of light concentration and an irradiation intensity of 1000 W / m 2 Perform battery electrical performance and temperature tests.

[0061] Comparative Example 2

[0062] Adopt Figure 1 The photovoltaic module frame shown, use silicone rubber to replace the thermal conductive insulating layer 30, and other conditions are the same as those in Comparative Example 1, and start the chiller for testing.

[0063] Example 1

[0064] Compared with Comparative Example 2, the difference is that the thermal conductive insulating layer 30 uses epoxy resin and zirconia filler.

[0065] Example 2

[0066] Compared with Comparative Example 2, the difference is that the thermal conductive insulating layer 30 uses epoxy resin and silicon nitride filler.

[0067] Example 3

[0068] Compared with Comparative Example 2, the difference is that the thermal conductive insulating layer 30 uses epoxy resin and beryllium oxide filler with high thermal conductivity, and all air channels in the photovoltaic module frame are cancelled and replaced with the frame substrate (that is, the air channels are filled to be solid).

[0069] Comparative Example 3

[0070] Compared with Comparative Example 2, the difference is that the thermal conductive insulating layer 30 uses epoxy resin and beryllium oxide filler with high thermal conductivity, and the chiller is not started.

[0071] Table 1 Electrical performance data table of components in each example

[0072] Current (A) Voltage (V) Power (W) Temperature (°C) Water flow Air flow Comparative Example 1 13.98 4.80 67.10 180.2 None None Comparative Example 2 13.96 4.96 69.24 149.6 Yes Yes Example 1 13.98 5.74 80.25 73.1 Yes Yes Example 2 14.00 5.88 82.32 57.6 Yes Yes Example 3 13.94 5.38 75.00 114.4 Yes None Comparative Example 3 13.98 4.89 68.36 168.8 None Yes

[0073] The experimental results are shown in Table 1. It can be seen that in Comparative Example 1, when using aluminum profiles instead of the frame assembly, the temperature can reach 180°C. Compared with Comparative Example 1, in Comparative Example 2, Comparative Example 3, and Examples 1-3, by using the photovoltaic module frame of the present application, the temperature during the operation of the battery unit 50 can be reduced. However, in Comparative Example 2, when using silicone instead of the thermally conductive insulating layer 30, although it plays an insulating and gap-filling role for the battery unit 50 and realizes the heat dissipation function to a certain extent, its thermal conductivity is poor and the effect is relatively poor. Different materials are used for the thermally conductive insulating layer 30 in Examples 1 and 2, and the temperature of the battery unit 50 is relatively low. Moreover, the electrical performance of the battery unit 50 in Example 2 is good and the power is the highest. In Example 3, the air channel is not used for heat dissipation, and the overall temperature of the battery unit 50 is higher than that in Example 2. Therefore, the air channel can further improve the heat dissipation effect, and the cooling effect is better in windy weather in nature. Although the above-mentioned photovoltaic module frame is adopted in Comparative Example 3, the chiller is not started, and the cooling section of the heat pipe only relies on natural air for cooling, so the heat dissipation capacity is limited.

[0074] Therefore, the key to solving the technical problem of the present invention lies in setting a liquid cooling channel 101 in the cooling pipe 10 to cool the condensation end 21 of the evaporation pipe 20, and setting a thermally conductive insulating layer 30 between the evaporation pipe 20 and the battery unit 50 to enhance heat conduction. Further, setting a first air channel 102 in the cooling pipe 10 and a second air channel 202 communicated with the first air channel 102 in the evaporation pipe 20 can maximize the cooling efficiency, which is a preferred solution of the present application.

[0075] The above has introduced in detail a photovoltaic module frame and a photovoltaic device provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. It should be noted that in the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] It should be understood that the terms "comprising" and "including" indicate the presence of the stated features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or", "and / or", "including at least one of the following", etc. used in this application can be interpreted inclusively, or mean any one or any combination. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C", and again, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0077] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this document, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context indicates otherwise.

[0078] It should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "upper", "lower", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application.

[0079] The above are only the preferred embodiments of this application, and do not limit the patent scope of this application accordingly. The various technical features of the technical solutions of this application can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, as long as the combination of these technical features does not conflict, is similarly included in the patent protection scope of this application.

Claims

1. A photovoltaic module frame, characterized in that: include: A cooling pipeline, wherein a liquid cooling channel is provided in the cooling pipeline; At least one evaporation pipeline, wherein at least one heat pipe for containing a heat exchange medium is disposed in the evaporation pipeline, and both ends of the heat pipe are closed ends and respectively penetrate the side wall of the cooling pipeline and extend into the liquid cooling channel to form two condensation ends; The heat-conducting insulating layer is arranged on the surface of the evaporation pipe and is used for carrying and cooling the battery unit.

2. The photovoltaic module frame according to claim 1, characterized in that: A surface of the heat pipe facing the heat-conducting insulating layer is a plane.

3. The photovoltaic module frame according to claim 1, characterized in that: The cooling duct is also provided with a first air channel; A second air passage communicating with the first air passage is also provided in the evaporation duct.

4. The photovoltaic module frame according to claim 1, characterized in that: A sealing member is provided at the connection between the evaporation pipe and the cooling pipe.

5. The photovoltaic module frame according to claim 1, characterized in that: The thermally conductive insulating layer comprises an adhesive and a thermally conductive filler.

6. The photovoltaic assembly frame according to claim 5, characterized in that: The adhesive is selected from at least one of epoxy resin, polyvinyl butyral, phenolic resin, polyimide resin, polyethylene terephthalate and polyphenylene ether; and / or, The thermally conductive filler is selected from at least one of Al2O3, MgO, ZnO, BeO, BN, Si3N4 and AlN.

7. The photovoltaic module frame according to any one of claims 1 to 6, characterized in that: The cooling pipeline comprises: At least two first cooling pipes are arranged parallel to the first direction, and the outermost two first cooling pipes are respectively provided with a liquid input port and a liquid discharge port; at least one second cooling pipeline arranged parallel to a second direction, the second cooling pipeline being connected to all the first cooling pipelines and configured such that liquid flows in from the liquid input port, flows through all the first cooling pipelines and the second cooling pipelines, and then flows out from the liquid discharge port, wherein the second direction is perpendicular to the first direction; The at least one evaporation pipe is arranged parallel to the second direction, the evaporation pipe is arranged between two adjacent first cooling pipes, and the condensation ends extend into the corresponding liquid cooling channels respectively.

8. The photovoltaic assembly frame according to claim 7, characterized in that: The second cooling pipes and the evaporation pipes are arranged alternately along the first direction.

9. A photovoltaic device, characterized in that: Comprising a battery unit and a photovoltaic assembly frame as described in any one of claims 1 to 8; The battery unit is arranged on the heat-conductive insulating layer.

10. The photovoltaic device according to claim 9, characterized in that: Also includes: The packaging layer is used to package the battery unit.

11. The photovoltaic device according to claim 10, characterized in that: The encapsulation layer is a silica gel layer or an epoxy resin layer.

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