Photovoltaic module and photovoltaic power station

Abstract

The utility model relates to a photovoltaic module and a photovoltaic power station. The photovoltaic module comprises a battery piece, an energy storage film and a junction box control circuit. The junction box control circuit is used for controllably storing the electric energy output by the battery piece in the energy storage film and controllably enabling the energy storage film to output the electric energy. In the outdoor operation process of the photovoltaic module, when power limitation and open circuit occur, the junction box control circuit can store redundant electric quantity in the energy storage film; when the power generation efficiency of the photovoltaic module is reduced or even the photovoltaic module cannot generate power due to insufficient illumination, the junction box control circuit can transmit the electric energy stored by the energy storage film to a power grid in a stable voltage and current manner through a specific electric energy release mechanism according to a demand signal of the power grid, so that the discontinuity defect of photovoltaic power generation in time is effectively made up, and the service life of the photovoltaic module is prolonged. Therefore, the stability and the reliability of the whole photovoltaic power station are improved. And meanwhile, the energy storage film is used for storing electric energy, so that the photovoltaic module is convenient to assemble and low in cost.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic module and a photovoltaic power station. Background Technology

[0002] Photovoltaic power generation utilizes the photovoltaic effect of semiconductors to directly convert light energy into electrical energy. With the rapid development of photovoltaic power generation technology, the power generation efficiency of photovoltaic modules is becoming increasingly higher. However, photovoltaic modules still face many problems: difficulty in providing continuous power when sunlight is insufficient, poor power generation stability, and difficulty in energy storage. One proposed solution is to combine photovoltaic modules with external energy storage devices to address these issues; however, this approach suffers from drawbacks such as system complexity, inconvenient assembly, high cost, and large footprint. Another approach proposes making energy storage batteries into small, modular units and mounting them on the back of photovoltaic modules to address these problems as well. However, this approach also suffers from complex assembly operations and high costs. Utility Model Content

[0003] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a photovoltaic module and photovoltaic power station that can achieve continuous power supply, improve power generation stability, facilitate assembly, and reduce costs.

[0004] A photovoltaic module, comprising:

[0005] Battery cells;

[0006] Energy storage membrane, wherein the energy storage membrane is connected to the battery cell; and

[0007] The junction box control circuit is electrically connected to both the battery cell and the energy storage membrane. The junction box control circuit is used to controllably store the electrical energy output by the battery cell in the energy storage membrane and controllably cause the energy storage membrane to output electrical energy.

[0008] In one embodiment, the photovoltaic module further includes a front panel, a first adhesive layer, a second adhesive layer, and a back panel; the front panel, the first adhesive layer, the solar cells, the second adhesive layer, and the back panel are arranged sequentially; the energy storage film is disposed between the front panel and the back panel or on either side of the front panel and the back panel away from each other.

[0009] In one embodiment, the energy storage film is a non-transparent film, and the energy storage film is disposed between the second adhesive layer and the back panel or on the side of the back panel opposite to the second adhesive layer.

[0010] In one embodiment, when the energy storage film is disposed on the side of the back panel away from the second adhesive layer, the photovoltaic module further includes a protective layer, and the energy storage film is disposed between the back panel and the protective layer.

[0011] In one embodiment, the photovoltaic module further includes a thermoelectric film connected to the solar cells and electrically connected to the junction box control circuit.

[0012] In one embodiment, the thermoelectric film is disposed between the second adhesive layer and the back panel.

[0013] In one embodiment, the photovoltaic module further includes an insulating layer disposed between the thermoelectric film and the energy storage film.

[0014] In one embodiment, the thermoelectric film is a flexible thermoelectric film; and / or, the thickness of the thermoelectric film is 10. -5 mm~0.5mm.

[0015] In one embodiment, the energy storage membrane is a flexible energy storage membrane; the thickness of the energy storage membrane is 10. -5 mm~1mm.

[0016] A photovoltaic power station, the photovoltaic power station including the aforementioned photovoltaic modules.

[0017] The aforementioned photovoltaic modules and photovoltaic power stations, due to their energy storage membranes, possess energy storage capabilities. During outdoor operation of the photovoltaic modules, in the event of power outages or circuit interruptions, the junction box control circuit can store excess electricity in the energy storage membrane. When insufficient sunlight reduces the power generation efficiency of the photovoltaic modules or even prevents them from generating electricity, the junction box control circuit can, based on the grid's demand signal, transmit the stored energy to the grid at a stable voltage and current through a specific energy release mechanism. This effectively compensates for the discontinuous nature of photovoltaic power generation, ensuring continuous power supply and improving the stability and reliability of the entire photovoltaic power station. Furthermore, compared to the approach of combining photovoltaic modules with external energy storage devices, using energy storage membranes to store electrical energy offers advantages such as easier assembly and lower cost. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a photovoltaic module according to an embodiment of this application.

[0019] Figure 2 This is a structural diagram of a photovoltaic module according to another embodiment of this application.

[0020] Figure 3 This is a structural diagram of the back side of a photovoltaic module according to an embodiment of this application.

[0021] Figure 4 This is a circuit diagram of a photovoltaic module according to an embodiment of this application.

[0022] 110. Solar cell; 120. Energy storage film; 130. Junction box control circuit; 140. Front panel; 150. First adhesive layer; 160. Second adhesive layer; 170. Back panel; 180. Protective layer; 190. Thermoelectric film; 191. Insulating layer; 192. Photovoltaic frame; 193. Cable; 194. Connector plug; 210. Power grid; 220. Inverter. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] See Figure 1 , Figure 3 and Figure 4 , Figure 1 A structural diagram of a photovoltaic module according to an embodiment of this application is shown. Figure 3 This application shows a structural diagram of the back side of a photovoltaic module according to an embodiment of the present application. Figure 4 A circuit diagram of a photovoltaic module according to an embodiment of this application is shown. An embodiment of this application provides a photovoltaic module including: a solar cell 110, an energy storage film 120, and a junction box control circuit 130. The energy storage film 120 is connected to the solar cell 110. Both the solar cell 110 and the energy storage film 120 are electrically connected to the junction box control circuit 130. The junction box control circuit 130 is used to controllably store the electrical energy output from the solar cell 110 in the energy storage film 120 and to controllably cause the energy storage film 120 to output electrical energy.

[0025] It should be noted that, in this embodiment, "controllable" refers to corresponding control based on the actual needs of the power grid operation. Specifically, when power outages or circuit interruptions occur, the junction box control circuit 130 stores excess electricity in the energy storage membrane 120; when insufficient sunlight causes the photovoltaic module's power generation efficiency to decrease or even fail to generate electricity, the junction box control circuit 130, based on the demand signal from the power grid 210, transmits the electrical energy stored in the energy storage membrane 120 to the power grid 210 with stable voltage and current through a specific energy release mechanism.

[0026] Specifically, an inverter 220 is also provided between the junction box control circuit 130 and the power grid 210, for example. The voltage supplied by the junction box control circuit 130 is processed by the inverter 220 and then connected to the power grid 210.

[0027] The aforementioned photovoltaic (PV) modules, due to their energy storage membrane 120, possess an energy storage function. During outdoor operation of the PV modules, in the event of power outages or circuit interruptions, the junction box control circuit 130 can store excess electricity in the energy storage membrane 120. When insufficient sunlight reduces the power generation efficiency of the PV modules or even prevents them from generating electricity, the junction box control circuit 130 can, based on the demand signal from the grid 210, transmit the energy stored in the energy storage membrane 120 to the grid 210 at a stable voltage and current through a specific energy release mechanism. This effectively compensates for the discontinuous nature of PV power generation, ensuring continuous power supply and improving the stability and reliability of the entire PV power station. Furthermore, compared to solutions combining PV modules with external energy storage devices, using the energy storage membrane 120 to store electrical energy offers advantages such as easier assembly and lower cost.

[0028] It should be noted that the "connection" between the energy storage membrane 120 and the battery cell 110 can be either a direct connection or an indirect connection, meaning that other components are provided between the energy storage membrane 120 and the battery cell 110. In this embodiment, the energy storage membrane 120 and the battery cell 110 are specifically connected indirectly, which can effectively prevent short circuit faults caused by a direct connection between the battery cell 110 and the energy storage membrane 120.

[0029] For example, the photovoltaic module includes at least one of an adhesive layer and an insulating layer 191 disposed between the energy storage membrane 120 and the solar cell 110. The adhesive layer includes, but is not limited to, PVB (Polyvinyl Butyral), EVA (Ethylene Vinyl Acetate), or TPU (Thermoplastic Polyurethane) materials, which can be flexibly adjusted and set according to actual needs.

[0030] For example, when the energy storage film 120 is a light-transmitting material, the energy storage film 120 can be disposed on either the front or the back of the battery cell 110; when the energy storage film 120 is a non-light-transmitting material, the energy storage film 120 is specifically disposed on the back of the battery cell 110, thereby avoiding shading of the battery cell 110 and affecting the power generation efficiency when disposed on the front of the battery cell 110.

[0031] In this embodiment, the energy storage membrane 120 is a non-transparent membrane, which has lower material requirements and can reduce costs. It is specifically arranged on the back of the battery cell 110. In this way, on the one hand, it can avoid shading the battery cell 110 and affecting the power generation efficiency if it is arranged on the front of the battery cell 110; on the other hand, the energy storage membrane 120 plays a protective role on the back of the battery cell 110.

[0032] Please see Figure 1 In some embodiments, the photovoltaic module further includes a front panel 140, a first adhesive layer 150, a second adhesive layer 160, and a back panel 170. The front panel 140, the first adhesive layer 150, the solar cell 110, the second adhesive layer 160, and the back panel 170 are arranged sequentially. In this way, the front panel 140, the solar cell 110, and the back panel 170 are integrated into one unit, providing protection for the solar cell 110.

[0033] Optionally, the front panel 140 may be a light-transmitting panel, specifically a glass panel or a panel made of other light-transmitting materials. The back panel 170 may be a light-transmitting panel or a non-light-transmitting panel, for example, without limitation.

[0034] Based on the aforementioned embodiments, the energy storage membrane 120 can be disposed at any position between the front panel 140 and the back panel 170, or it can be disposed on either side of the front panel 140 and the back panel 170 away from each other. The specific arrangement can be flexibly adjusted and set according to actual needs, and is not limited here.

[0035] Please see Figure 1 When the energy storage membrane 120 is placed between the front panel 140 and the back panel 170, the front panel 140 and the back panel 170 provide protection for the energy storage membrane 120. When the energy storage membrane 120 is placed on either side of the front panel 140 and the back panel 170, it can still perform the energy storage function, but it is prone to damage and being washed away by rainwater during long-term use.

[0036] Please see Figure 1 In one specific embodiment, the energy storage film 120 is, for example, a non-transparent film. The energy storage film 120 is disposed between the second adhesive layer 160 and the back panel 170. With this arrangement, the energy storage film 120 is located on the back of the battery cell 110, and will not block the light from the battery cell 110, ensuring that the power generation efficiency of the battery cell 110 is not affected. Furthermore, the second adhesive layer 160, located between the battery cell 110 and the back panel 170, protects the battery cell 110, preventing it from breaking or short-circuiting if the energy storage film 120 comes into direct contact with it. Additionally, the back panel 170 prevents the energy storage film 120 from being exposed, thus protecting it.

[0037] Of course, in another embodiment, the energy storage film 120 is not limited to being located between the second adhesive layer 160 and the back panel 170; please refer to [reference needed]. Figure 2 The energy storage film 120 can also be disposed on the side of the back panel 170 opposite to the second adhesive layer 160. This arrangement will not block the light of the solar cell 110, ensuring that the power generation efficiency of the solar cell 110 is not affected, and will not come into contact with the solar cell 110, thus preventing the solar cell 110 from breaking or short-circuiting.

[0038] Please continue reading. Figure 2 Based on the aforementioned embodiments, the photovoltaic module further includes a protective layer 180. An energy storage film 120 is disposed between the back panel 170 and the protective layer 180. Thus, the protective layer 180 primarily protects the energy storage film 120, preventing damage from environmental factors such as moisture, and improving the weather resistance of the energy storage film 120.

[0039] Please see Figure 1 and Figure 4 For example, the photovoltaic module also includes a thermoelectric film 190. The thermoelectric film 190 is connected to the solar cell 110 and electrically connected to the junction box control circuit 130. In this way, the thermoelectric film 190 can make full use of the heat generated by the photovoltaic module during outdoor operation, converting the heat into electrical energy, thereby increasing the power output of the photovoltaic module and improving the power generation.

[0040] Similar to the arrangement of the energy storage film 120 in the photovoltaic module in the above embodiments, the "connection" between the thermoelectric power generation film 190 and the solar cell 110 can be either a direct connection or an indirect connection, meaning that other components are provided between the thermoelectric power generation film 190 and the solar cell 110. In this embodiment, the thermoelectric power generation film 190 and the solar cell 110 are specifically connected indirectly, thereby effectively preventing short-circuit faults caused by a direct connection between the solar cell 110 and the thermoelectric power generation film 190.

[0041] Similar to the arrangement of the energy storage film 120 in the photovoltaic module in the above embodiments, the thermoelectric film 190 can be set at any position between the front panel 140 and the back panel 170, or it can be set on either side of the front panel 140 and the back panel 170 away from each other. The specific setting can be flexibly adjusted and set according to actual needs, and is not limited here.

[0042] Please see Figure 1 or Figure 2For example, the thermoelectric film 190 is disposed between the second adhesive layer 160 and the back panel 170. With this arrangement, the thermoelectric film 190 is located on the back of the solar cell 110, preventing it from blocking light from the solar cell 110 and ensuring that the power generation efficiency of the solar cell 110 is not affected. Furthermore, the second adhesive layer 160 is located between the solar cell 110 and the thermoelectric film, preventing the solar cell 110 from breaking or short-circuiting if the thermoelectric film comes into direct contact with it. Additionally, the back panel 170 prevents the thermoelectric film from being exposed, providing protection for it.

[0043] Please see Figure 1 When both the thermoelectric power generation film 190 and the energy storage film 120 are disposed between the second adhesive layer 160 and the back panel 170, the arrangement order of the thermoelectric power generation film 190 and the energy storage film 120 can be set according to actual needs. Either the thermoelectric power generation film 190 can be closer to the battery cell 110, or the energy storage film 120 can be closer to the battery cell 110.

[0044] Please see Figure 1 Based on the aforementioned embodiments, the photovoltaic module further includes an insulating layer 191. The insulating layer 191 is disposed between the thermoelectric film 190 and the energy storage film 120. Thus, the insulating layer 191 serves as an insulating barrier, ensuring that the energy storage film 120 and the thermoelectric film 190 are mutually insulated and isolated, preventing electrical contact between the energy storage film 120 and the thermoelectric film 190 that could lead to a short circuit.

[0045] For example, the insulating layer 191 may include, but is not limited to, transparent silicone or other materials with high transparency and high weather resistance. The specific material may be flexibly adjusted and set according to actual needs, and is not limited here.

[0046] For example, the thickness of the insulating layer 191 is, but is not limited to, 10 mm. -5 mm~0.1mm.

[0047] In some embodiments, the thermoelectric film 190 can be a flexible thermoelectric film, such as a bismuth telluride-based thin film; the thermoelectric film 190 can also be other materials with thermoelectric properties, which can be flexibly adjusted and set according to actual needs, and are not limited here. The thermoelectric film 190 is manufactured by methods including but not limited to coating, spraying, etc. Optionally, the thickness of the thermoelectric film 190 is including but not limited to 10 mm. -5 mm~0.5mm.

[0048] In some embodiments, the energy storage membrane 120 is, but is not limited to, a flexible energy storage membrane, such as a polyetherimide film. The energy storage membrane 120 is manufactured, but is not limited to, by coating, spraying, or other methods. Optionally, the thickness of the energy storage membrane 120 is, but is not limited to, 10 mm. -5mm~1mm.

[0049] Please see Figure 1 and Figure 3 In some embodiments, the junction box control circuit 130 can be either an integrated junction box structure or a three-part structure. The specific configuration can be flexibly adjusted and set according to actual needs, and is not limited here.

[0050] Please see Figure 1 and Figure 3 Based on any of the foregoing embodiments, the photovoltaic module further includes a photovoltaic frame 192. The photovoltaic frame 192 serves as a support structure, providing support for the combined structure of the front panel 140, the first adhesive layer 150, the solar cell 110, the second adhesive layer 160, the back panel 170, the energy storage film 120, and the thermoelectric film 190, thereby ensuring the stability of the overall structure.

[0051] Please see Figure 1 and Figure 3 Based on any of the foregoing embodiments, the photovoltaic module further includes a cable 193 and a connector plug 194. The junction box control circuit 130 is connected to the connector plug 194 via the cable 193. The connector plug 194 is used for electrical connection with the inverter 220, thereby enabling grid connection 210.

[0052] In one embodiment, this application also provides a photovoltaic power station, which includes photovoltaic modules from any of the above embodiments. Furthermore, the photovoltaic power station also includes a power grid 210, with a junction box control circuit 130 connected to an inverter 220, and connected to the power grid 210 via the inverter 220.

[0053] The aforementioned photovoltaic power station, equipped with an energy storage membrane 120, possesses an energy storage function. During outdoor operation of the photovoltaic modules, in the event of power outages or circuit interruptions, the junction box control circuit 130 can store excess electricity in the energy storage membrane 120. When insufficient sunlight reduces the power generation efficiency of the photovoltaic modules or even prevents them from generating electricity, the junction box control circuit 130 can, based on the demand signal from the grid 210, transmit the stored energy in the energy storage membrane 120 to the grid 210 at a stable voltage and current through a specific energy release mechanism. This effectively compensates for the discontinuous nature of photovoltaic power generation, ensuring continuous power supply and improving the stability and reliability of the entire photovoltaic power station. Furthermore, compared to solutions combining photovoltaic modules with external energy storage devices, using the energy storage membrane 120 for energy storage offers advantages such as easier assembly and lower cost.

[0054] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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 communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A photovoltaic module, characterized in that, include: Battery cell (110); An energy storage membrane (120) is connected to the battery cell (110); and Junction box control circuit (130), the battery cell (110) and the energy storage membrane (120) are both electrically connected to the junction box control circuit (130), the junction box control circuit (130) is used to controllably store the electrical energy output by the battery cell (110) in the energy storage membrane (120) and controllably make the energy storage membrane (120) output electrical energy.

2. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module further includes a front panel (140), a first adhesive layer (150), a second adhesive layer (160), and a back panel (170); the front panel (140), the first adhesive layer (150), the solar cell (110), the second adhesive layer (160), and the back panel (170) are arranged in sequence; the energy storage film (120) is disposed between the front panel (140) and the back panel (170) or disposed on either side of the front panel (140) and the back panel (170) away from each other.

3. The photovoltaic module according to claim 2, characterized in that, The energy storage film (120) is a non-transparent film. The energy storage film (120) is disposed between the second adhesive layer (160) and the back panel (170) or on the side of the back panel (170) away from the second adhesive layer (160).

4. The photovoltaic module according to claim 3, characterized in that, When the energy storage film (120) is disposed on the side of the back panel (170) away from the second adhesive layer (160), the photovoltaic module further includes a protective layer (180), and the energy storage film (120) is disposed between the back panel (170) and the protective layer (180).

5. The photovoltaic module according to claim 3, characterized in that, The photovoltaic module also includes a thermoelectric film (190), which is connected to the solar cell (110) and electrically connected to the junction box control circuit (130).

6. The photovoltaic module according to claim 5, characterized in that, The thermoelectric film (190) is disposed between the second adhesive layer (160) and the back panel (170).

7. The photovoltaic module according to claim 6, characterized in that, The photovoltaic module also includes an insulating layer (191) disposed between the thermoelectric film (190) and the energy storage film (120).

8. The photovoltaic module according to claim 5, characterized in that, The thermoelectric film (190) is a flexible thermoelectric film; and / or, the thickness of the thermoelectric film (190) is 10. -5 mm~0.5mm.

9. The photovoltaic module according to any one of claims 1 to 8, characterized in that, The energy storage membrane (120) is a flexible energy storage membrane; the thickness of the energy storage membrane (120) is 10. -5 mm~1mm.

10. A photovoltaic power station, characterized in that, The photovoltaic power station includes photovoltaic modules as described in any one of claims 1 to 9.

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