Photovoltaic module with snow removal function
By adopting a double-layer heating glass structure and a built-in heating layer on the photovoltaic module, the problems of low snow removal and deicing efficiency in the prior art and the possible mechanical damage to the components are solved, and the rapid and uniform cleaning of snow is achieved.
Patent Information
- Application Number
- CN202422137436.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing photovoltaic module snow removal and ice removal methods have problems such as low efficiency, uneven heating and possible mechanical damage to the components.
It adopts a double-layer heating glass structure with a built-in heating layer, which supplies power to the heating layer through the power-on connector, generating heat to melt snow. Heated glass, as the top surface of the photovoltaic module, can quickly clean up snow.
It realizes rapid cleaning of snow, with high efficiency and uniform heating, and avoids mechanical damage to photovoltaic modules.
Smart Images
Figure CN223007534U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic module with a snow removal function. Background Art
[0002] In winter, photovoltaic modules are prone to snow accumulation. The power loss of the modules caused by snow accumulation exceeds 5%. Timely cleaning of the snow on the photovoltaic modules can avoid the generation of hot spot effects and extend the service life of the modules. At present, in addition to manual cleaning, methods such as installing heaters on the backplane of the photovoltaic module, installing heaters on the frame of the photovoltaic module, and installing mechanical vibration or mechanical scraping and ice removal devices are also included for snow cleaning.
[0003] However, the existing snow and ice removal methods for photovoltaic modules still have certain drawbacks. For the method of installing heaters on the backplane of the photovoltaic module, due to the certain thickness of the module, the heating effect will be affected and the snow and ice removal efficiency will be reduced. For the method of installing heaters on the frame of the photovoltaic module, due to the large area of the photovoltaic module, the ice removal effect of only heating the four surrounding frames is not obvious, and the snow and ice in the middle position of the photovoltaic module cannot be removed. For mechanical vibration or mechanical scraping and ice removal devices, mechanical damage may be caused to the photovoltaic module during operation, reducing the service life of the photovoltaic module and the power generation efficiency of the photovoltaic module. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a photovoltaic module with a snow removal function to solve the above technical problems.
[0005] The technical solution of the utility model for solving the above technical problems is as follows: a photovoltaic module with a snow removal function includes a bottom plate; a photovoltaic cell layer is covered on the bottom plate, and a heating glass is covered on the photovoltaic cell layer; the heating glass includes a heating layer, a first glass and a second glass, the heating layer is sandwiched between the first glass and the second glass, and the heating layer is connected with a power-on joint.
[0006] The beneficial effect of the utility model is: the heating glass is a double-glass structure with a built-in heating layer. When there is snow accumulation, power is supplied to the heating layer through the power-on joint, and the heating layer generates heat to melt the snow accumulation. The heating glass serves as the top surface of the photovoltaic module, and the snow accumulation will cover the heating glass. Therefore, by setting the heating glass, the snow accumulation can be quickly cleaned, and it has the characteristics of high cleaning efficiency and uniform heating.
[0007] On the basis of the above technical solution, the utility model can be further improved as follows.
[0008] Further, the heating layer is a heating wire or a heating film.
[0009] Further, the photovoltaic cell layer is respectively connected with a positive wire and a negative wire. A junction box is connected to the bottom plate, and the power-on connector, the positive wire, and the negative wire all extend into the junction box.
[0010] The beneficial effect of adopting the above further solution is that the power-on connector, the positive wire, and the negative wire are protected through the junction box.
[0011] Further, a power cord is further included. The power cord extends into the junction box, and the power cord is connected to the power-on connector.
[0012] The beneficial effect of adopting the above further solution is that the power cord is used to connect to a power source to supply power to the heating layer.
[0013] Further, a temperature sensor is further included. The temperature sensor is installed on the heating glass.
[0014] The beneficial effect of adopting the above further solution is that the temperature of the heating glass is detected through the temperature sensor, so as to facilitate providing a reference for the staff to control the heating time, heating temperature, etc.
[0015] Further, a snow accumulation detection device is further included. The snow accumulation detection device is installed on the heating glass.
[0016] The beneficial effect of adopting the above further solution is that the snow coverage amount on the photovoltaic module is detected through the snow accumulation detection device, so as to facilitate providing a reference for the staff to control the heating time, heating temperature, etc.
[0017] Further, the snow accumulation detection device is a pressure sensor or a thickness sensor.
[0018] Further, a first encapsulation layer is provided between the bottom plate and the photovoltaic cell layer, and a second encapsulation layer is provided between the heating glass and the photovoltaic cell layer.
[0019] Further, a frame is further included. The bottom plate, the photovoltaic cell layer, and the heating glass are all arranged within the frame.
[0020] Further, the bottom plate is tempered glass or a polyvinyl fluoride film backplane. Description of the Drawings
[0021] Figure 1 It is a schematic structural diagram of a photovoltaic module with a snow removal function according to the present utility model;
[0022] Figure 2 It is a schematic diagram of the heating glass of a photovoltaic module with a snow removal function according to the present utility model;
[0023] Figure 3Schematic diagram of the heating glass structure of a photovoltaic module with snow removal function according to the present utility model;
[0024] Figure 4 Cross-sectional view of a photovoltaic module with snow removal function according to the present utility model.
[0025] In the drawings, the list of components represented by each reference numeral is as follows:
[0026] 1. Bottom plate; 2. Photovoltaic cell layer; 3. Heating glass; 4. Heating layer; 5. First glass; 6. Second glass; 7. Junction box; 8. First encapsulation layer; 9. Second encapsulation layer; 10. Frame; 11. Solder ribbon; 12. Metal electrode; 13. Anti-reflection layer; 14. Silicon layer; 15. Back electrode. Detailed implementation manners
[0027] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0028] As Figure 1 shown, this embodiment provides a photovoltaic module with snow removal function, including a bottom plate 1; the bottom plate 1 is covered with a photovoltaic cell layer 2, and the photovoltaic cell layer 2 is covered with a heating glass 3; as Figure 2 and Figure 3 shown, the heating glass 3 includes a heating layer 4, a first glass 5 and a second glass 6, the heating layer 4 is sandwiched between the first glass 5 and the second glass 6, and the heating layer 4 is connected with a power-on connector.
[0029] As Figure 4 shown, the photovoltaic cell layer 2 includes a plurality of photovoltaic cell modules. The photovoltaic cell module includes a silicon layer 14, a metal electrode 12, an anti-reflection layer 13 and a back electrode 15. The back electrode 15 is covered with the silicon layer 14, the silicon layer 14 is covered with the anti-reflection layer 13, and the metal electrode 12 is arranged on the anti-reflection layer 13. Each photovoltaic cell module is connected together by a solder ribbon 11. Among them, the metal electrode 12 is made of silver, and the back electrode 15 is made of aluminum. It should be noted that the above structure of the photovoltaic cell layer 2 is only an exemplary illustration and should not be construed as a limitation on the photovoltaic cell layer 2. In actual applications, the specific structure of the photovoltaic cell layer 2 can be set according to specific usage situations to meet the usage requirements.
[0030] The heating glass 3 has a double-glass structure with a built-in heating layer 4. When there is snow accumulation, power is supplied to the heating layer 4 through the power connection joint, causing the heating layer 4 to generate heat, thereby making the entire heating glass 3 heat up and achieving rapid melting of the snow covering the heating glass 3. The heating glass 3 serves as the top surface of the photovoltaic module, and snow will cover the heating glass 3. Therefore, by providing the heating glass 3, snow removal can be quickly achieved, with characteristics such as high cleaning efficiency and uniform heating.
[0031] Optionally, in the embodiment, the heating layer 4 is a heating wire or a heating film. Both the heating wire and the heating film are made of high light transmittance materials to avoid affecting the power generation efficiency of the photovoltaic module. The heating layer 4 can also use other heating media that can meet the heating requirements and do not affect the normal operation of the photovoltaic module.
[0032] Optionally, in the embodiment, the photovoltaic cell layer 2 is respectively connected with a positive wire and a negative wire, and a junction box 7 is connected to the bottom plate 1. The power connection joint, the positive wire, and the negative wire all extend into the junction box 7. Through the junction box 7, protection is provided for the power connection joint, the positive wire, the negative wire, etc.
[0033] Optionally, in the embodiment, a power cord is further included. The power cord extends into the junction box 7 and is connected to the power connection joint. The power cord is used to connect to a power source to supply power to the heating layer 4.
[0034] Optionally, in the embodiment, a temperature sensor is further included. The temperature sensor is installed on the heating glass 3. By detecting the temperature of the heating glass 3 through the temperature sensor, it is convenient to provide a reference for staff to control the heating time, heating temperature, etc.
[0035] Optionally, in the embodiment, a snow detection device is further included. The snow detection device is installed on the heating glass 3. By detecting the snow coverage on the photovoltaic module through the snow detection device, it is convenient to provide a reference for staff to control the heating time, heating temperature, etc.
[0036] The staff can control the heating time, etc. according to the monitoring data of the temperature sensor and the snow accumulation detection device. An automated system can also be set up to achieve automatic snow removal control. Specifically: a controller is set up, and the controller is respectively connected to the temperature sensor, the snow accumulation detection device, and the power supply module. When the snow accumulation detection device monitors that there is no snow or ice on the photovoltaic module, the power supply module is controlled to be in the off state. When the snow accumulation detection device monitors that there is snow or ice on the photovoltaic module, the temperature value monitored by the temperature sensor is obtained. If the temperature value is less than the preset first temperature threshold, the power supply module is controlled to turn on and the heating layer 4 is energized; if the temperature value is greater than the preset second temperature threshold, the power supply module is controlled to turn off. Both the first temperature threshold and the second temperature threshold can be set according to the actual on-site needs, and the first temperature threshold is less than the second temperature threshold. During the process of the power supply module remaining in the on state, the snow accumulation detection device and the temperature sensor continue to be in the detection state until the snow accumulation detection device fails to detect snow or ice on the photovoltaic module, or the temperature detected by the temperature sensor is greater than the second temperature threshold, then the power supply module is controlled to turn off and the heating stops.
[0037] Optionally, in the embodiment, the snow accumulation detection device is a pressure sensor or a thickness sensor. The pressure sensor can detect the weight of the snow or ice, and the thickness sensor can detect the thickness of the covering on the surface of the photovoltaic module. The snow accumulation detection device can also use an AI intelligent camera, etc., or monitor the snow and ice in other forms.
[0038] Optionally, in the embodiment, a first encapsulation layer 8 is provided between the bottom plate 1 and the photovoltaic cell layer 2, and a second encapsulation layer 9 is provided between the heating glass 3 and the photovoltaic cell layer 2. Both the first encapsulation layer 8 and the second encapsulation layer 9 are encapsulation materials for sealing.
[0039] Optionally, in the embodiment, a frame 10 is further included, and the bottom plate 1, the photovoltaic cell layer 2, and the heating glass 3 are all arranged within the frame 10. The frame 10 is made of a metal material, such as aluminum. The frame 10 is used to fix the bottom plate 1, the photovoltaic cell layer 2, the heating glass 3, etc. to form the overall photovoltaic module.
[0040] Optionally, in the embodiment, the bottom plate 1 is tempered glass or a polyvinyl fluoride (PVF) film backplane. When the bottom plate 1 is made of tempered glass, a double-layer glass structure can also be adopted with a built-in heating layer 4 to achieve double-sided heating of the photovoltaic module and further promote the melting of snow and ice layers.
[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0043] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0044] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0045] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0046] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A photovoltaic module with snow removal function, characterized in that: The invention comprises a base plate (1); the base plate (1) is covered with a photovoltaic cell layer (2); the photovoltaic cell layer (2) is covered with a heating glass (3); the heating glass (3) comprises a heating layer (4), a first glass (5) and a second glass (6); the heating layer (4) is sandwiched between the first glass (5) and the second glass (6); and the heating layer (4) is connected to an electrical connector.
2. A photovoltaic module with snow removal function according to claim 1, characterized in that: The heating layer (4) is a heating wire or a heating film.
3. A photovoltaic module with snow removal function according to claim 1, characterized in that: The photovoltaic cell layer (2) is respectively connected to a positive line and a negative line, the bottom plate (1) is connected to a junction box (7), and the power connector, the positive line and the negative line all extend into the junction box (7).
4. A photovoltaic module with snow removal function according to claim 3, characterized in that: It also comprises a power line, the power line extends into the junction box (7), and the power line is connected to the power connector.
5. The photovoltaic module with snow removal function according to claim 1, characterized in that: It also comprises a temperature sensor, which is mounted on the heating glass (3).
6. The photovoltaic module with snow removal function according to claim 1, characterized in that: It also comprises a snow accumulation detection device, which is installed on the heated glass (3).
7. A photovoltaic module with snow removal function according to claim 6, characterized in that: The snow accumulation detection device is a pressure sensor or a thickness sensor.
8. The photovoltaic module with snow removal function according to claim 1, characterized in that: A first encapsulation layer (8) is provided between the base plate (1) and the photovoltaic cell layer (2), and a second encapsulation layer (9) is provided between the heating glass (3) and the photovoltaic cell layer (2).
9. The photovoltaic module with snow removal function according to claim 1, characterized in that: It also comprises a frame (10), wherein the base plate (1), the photovoltaic cell layer (2) and the heating glass (3) are all arranged in the frame (10).
10. The photovoltaic module with snow removal function according to claim 1, characterized in that: The bottom plate (1) is a tempered glass or polyvinyl fluoride film back plate.