Photovoltaic device

Abstract

The photovoltaic device comprises a front plate, a power generation layer, a rear plate and a diode, the front plate is configured to be of a wave-shaped structure, the front plate comprises wave crest parts and wave trough parts which are alternately arranged, the power generation layer is attached to the front plate, the rear plate is attached to the surface, away from the front plate, of the power generation layer, and the diode is connected with the power generation layer in parallel. The diodes are arranged corresponding to the trough parts, and the diodes are arranged between the power generation layer and the rear plate. The front plate and the rear plate are attached to the two opposite surfaces of the power generation layer respectively, so that the protection performance of the power generation layer is improved, and the service life of the photovoltaic device is prolonged. When the power generation layer of the trough part is shielded, the internal resistance of the power generation layer is increased, and voltages at two ends of the power generation layer are increased. When the voltage exceeds the break-over voltage of the diode, the diode is unidirectionally conducted, and the conducted diode can enable the two ends of the power generation layer to be short-circuited, so that the power generation layer is prevented from losing electric energy of other equipment in a circuit, and the working loss of the photovoltaic device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic device. Background Art

[0002] As traditional fossil energy causes greenhouse effect and other issues, the call for low-carbon and environmental protection is becoming stronger. In this context, the pursuit of clean energy is gradually increasing. Compared with traditional fossil energy, solar energy, as a high-quality clean energy, is favored by people because it is easy to obtain and does not produce pollutants.

[0003] In order to adapt to a variety of different installation environments, photovoltaic devices are often configured with curved structures to adapt to installation locations such as roofs. However, in environments such as roofs, there may be fallen leaves and dust covering the roof. The lower horizontal position of the photovoltaic device is prone to accumulation of dust, leaves or other obstructions, which is more likely to cause shading. The photovoltaic device in this area has low power generation efficiency, which may even affect the power generation efficiency of photovoltaic devices in other areas. Utility Model Content

[0004] The embodiments of the present application provide a photovoltaic device to at least partially improve the above technical problems.

[0005] An embodiment of the present application provides a photovoltaic device, including a front plate, a power generation layer, a rear plate and a diode. The front plate is configured as a wavy structure, the front plate includes alternately arranged crests and troughs, the power generation layer is attached to the front plate, the rear plate is attached to the surface of the power generation layer away from the front plate, the diode is connected in parallel with the power generation layer, the diode is arranged corresponding to the trough, and the diode is arranged between the power generation layer and the rear plate.

[0006] In one embodiment, the front plate is a hard structure, the rear plate and the power generation layer are both bendable structures, the power generation layer is attached to the front plate, and the rear plate is attached to the front plate.

[0007] In one embodiment, the front plate and the rear plate are both hard structures, the rear plate is configured as a wavy structure that matches the front plate, the front plate and the rear plate are arranged correspondingly, and the power generation layer is a bendable structure and is clamped between the front plate and the rear plate.

[0008] In one embodiment, the power generation layer includes a plurality of battery cells arranged in series, and the battery cells located in the trough portion are electrically connected to at least one diode.

[0009] In one embodiment, the diode includes a diode body, an insulating layer and a connector. The diode body and the connector are embedded in the insulating layer. The two ends of the diode body are respectively electrically connected to a connector, and the positive and negative poles of the battery cell are respectively electrically connected to the connectors at both ends of the diode body.

[0010] In one embodiment, the insulating layer is provided with a first through hole and a second through hole, the connectors at both ends of the diode body are exposed from the first through hole and the second through hole respectively, and the positive and negative electrodes of the battery cell are respectively extended into the first through hole and the second through hole to be electrically connected with the connectors.

[0011] In one embodiment, each diode is connected in parallel with a plurality of solar cells.

[0012] In one embodiment, each diode is connected in parallel with 2 or 4 solar cells.

[0013] In one embodiment, the thickness of the diode is 0.5 mm to 2 mm.

[0014] In one embodiment, the photovoltaic device further includes a first adhesive layer and a second adhesive layer, the first adhesive layer is bonded between the front plate and the power generation layer, and the second adhesive layer is bonded between the rear plate and the power generation layer.

[0015] The embodiment of the present application provides a photovoltaic device, in which the front plate and the rear plate are respectively attached to the opposite sides of the power generation layer, thereby improving the protection performance of the power generation layer and improving the service life of the photovoltaic device. The front plate has a crest portion and a trough portion, and the front plate can force the power generation layer and the rear plate to form corresponding crest portions and trough portions. Photovoltaic devices with consistent crest portions and trough portions can be easily installed in a variety of different environments. And when the power generation layer in the trough portion is shielded, the internal resistance of the power generation layer increases, and the voltage at both ends of the power generation layer increases. When the voltage exceeds the conduction voltage of the diode, the diode conducts unidirectionally, and the turned-on diode can short-circuit the two ends of the power generation layer, avoiding the power generation layer from wasting the power of other devices in the circuit, and reducing the working loss of the photovoltaic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of a photovoltaic device proposed in an embodiment of the present application;

[0018] Figure 2 An exploded schematic diagram of a photovoltaic device proposed in an embodiment of the present application;

[0019] Figure 3 An exploded schematic diagram of another photovoltaic device proposed in an embodiment of the present application;

[0020] Figure 4A schematic diagram of the structure of a power generation layer and a diode proposed in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure of a diode proposed in an embodiment of the present application.

[0022] Figure numerals: photovoltaic device 100, front panel 10, crest portion 11, trough portion 12, power generation layer 20, battery cell 21, back panel 30, diode 40, diode body 41, insulating layer 42, connector 43, first through hole 431, second through hole 432, first adhesive layer 51, second adhesive layer 52. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0024] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0026] Example

[0027] The present application embodiment provides a photovoltaic device 100, see Figure 1 The photovoltaic device 100 may include a front plate 10, a power generation layer 20, a rear plate 30 and a diode 40. The front plate 10 and the rear plate 30 are respectively attached to the opposite sides of the power generation layer 20. Furthermore, the front plate 10 and the rear plate 30 can be connected to the power generation layer 20 as a whole by bonding with an adhesive layer, thereby improving the protection performance of the power generation layer 20 and improving the service life of the photovoltaic device 100. The diode 40 can be connected in parallel with the power generation layer 20, and when the power generation layer 20 is blocked or other reasons cause the power of the power generation layer 20 to decrease, within a certain range, the internal resistance of the power generation layer 20 increases, and the voltage at both ends of the power generation layer 20 increases. When the voltage exceeds the conduction voltage of the diode 40, the diode 40 conducts unidirectionally, and the current is transmitted from the conducting diode 40. The diode 40 can short-circuit the two ends of the power generation layer 20, which can avoid the power generation layer 20 from wasting the energy storage device and / or the power generation layer in the circuit, and reduce the working loss of the photovoltaic device 100.

[0028] Furthermore, the diode 40 has unidirectional conductivity, for example, when the current flows from the anode to the cathode, the diode 40 is in the on state. When the current flows in the opposite direction from the cathode to the anode, the diode 40 is in the off state. The positive electrode of the diode 40 in this embodiment can be electrically connected to the positive electrode of the power generation layer 20, and the negative electrode of the diode 40 can be electrically connected to the negative electrode of the power generation layer 20. The unidirectional conduction of the diode 40 can ensure that the current can be smoothly transmitted from the diode 40, ensure that the current has a stable flow direction, and further avoid the loss of current of the abnormally working battery cell 21.

[0029] Specifically, to facilitate the installation of the photovoltaic device 100, so that the photovoltaic device 100 can be better integrated into the installation environment. Figure 1 as well as Figure 2 In this embodiment, the front plate 10 is configured as a wavy structure. The front plate 10 may include alternately arranged crests 11 and troughs 12. The wavy structure can improve the strength and stability of the front plate 10. The power generation layer 20 is attached to the front plate 10, and the rear plate 30 is attached to the surface of the power generation layer 20 away from the front plate 10. The front plate 10 can force the power generation layer 20 and the rear plate 30 to form corresponding crests 11 and troughs 12, thereby forming an integrated wavy photovoltaic device 100. The wavy structure can enable the photovoltaic device 100 to adapt to the installation environment, such as a tile roof, where the tiles on the roof also have a wavy structure. The front plate 10 of the same structure can overlap with the tiles to facilitate the connection between the two. In addition, the two have the same structure, which can make the photovoltaic device 100 more beautiful in terms of integrity.

[0030] Furthermore, the wavy structure allows a single photovoltaic device 100 to overlap multiple tiles on the roof, and can disperse the gravity of the photovoltaic device 100 to multiple tiles at the same time, thereby ensuring the installation stability of the photovoltaic device 100. For details, please continue to refer to Figure 2 , the front plate 10, the power generation layer 20 and the back plate 30 may include at least one corresponding crest 11 and at least one trough 12, and the crests 11 and the troughs 12 are arranged alternately. More specifically, the size of the mounting plate can be selected and designed according to specific implementation requirements, such as the height difference, number, spacing between adjacent crests 11 and troughs 12, and the curvature radius of the crests 11 and troughs 12. Exemplarily, the curvature radius of the crest 11 and the curvature radius of the trough 12 are both 25mm-200mm. It can avoid that the curvature radius of the crest 11 and the trough 12 is too large, which reduces the bearing capacity of the photovoltaic device 100 and limits the weight of the power generation layer 20. It can also avoid that the curvature radius of the crest 11 and the trough 12 is too small, which increases the weight of the photovoltaic device 100 and increases the difficulty of installing the photovoltaic device 100. Furthermore, depending on factors such as the installation environment, the curvature radii of the crest portion 11 and the trough portion 12 may be the same or different, so that the photovoltaic device 100 can adapt to more installation structures of different shapes, thereby improving the versatility of use of the photovoltaic device 100.

[0031] In one embodiment, please refer to Figure 2 , the front plate 10 is a hard structure, and the hard structure of the front plate 10 can protect the power generation layer 20, etc. The front plate 10 can be a transparent plate, that is, the front plate 10 can be composed of a transparent material, for example, the front plate 10 can be a glass, a glass fiber layer, etc. It can ensure that light can be smoothly transmitted through the front plate 10 to the power generation layer 20, and ensure the use effect of the photovoltaic device 100. Preferably, the surface of the front plate 10 away from the power generation layer 20 can be coated with an anti-reflection coating to reduce the reflection of the surface to the sunlight, so as to improve the absorption efficiency of the sunlight.

[0032] The rear plate 30 may be a bendable structure, and the rear plate 30 has a certain degree of flexibility. Furthermore, the rear plate 30 may be the same size as the front plate 10, so that the rear plate 30 can completely cover the front plate 10. The power generation layer 20 may be a bendable structure, and the power generation layer 20 may be made of a flexible photovoltaic material, such as monocrystalline silicon, polycrystalline silicon or thin-film solar cells. The power generation layer 20 of the bendable structure can be configured in different shapes to form photovoltaic devices 100 of various shapes. The power generation layer 20 is attached to the front plate 10, and the rear plate 30 is attached to the power generation layer 20, which can increase the stability between the front plate 10, the power generation layer 20 and the rear plate 30, thereby increasing the stability and durability of the photovoltaic device 100. It can ensure that the power generation layer 20 and the front and rear plates 30 are tightly connected and fixed to avoid separation from each other. In addition, the rear plate 30 and the power generation layer 20 are attached to the surface of the front plate 10, thereby forming a wavy rear plate 30 and a power generation layer 20, and the wavy power generation layer 20 can increase the light absorption area and improve the power generation efficiency.

[0033] In another embodiment, see Figure 3 , the front plate 10 and the back plate 30 are both hard structures, and the front plate 10 and the back plate 30 can protect the internal components and support the entire structure. The front plate 10 and the back plate 30 can be made of glass or other hard materials, and have good durability and damage resistance. Exemplarily, the back plate 30 can be a full black plate, which can be made of a blackened polymer material, which can prevent light from transmitting from the back plate 30, and avoid the aging phenomenon of the wires and the like arranged on one side of the back plate 30 due to light, thereby improving the service life of the photovoltaic device 100. The back plate 30 is configured as a wavy structure that cooperates with the front plate 10, and the sizes of the front plate 10 and the back plate 30 are relatively set. Further, the crests 11 and the troughs 12 of the front plate 10 and the back plate 30 are relatively set, and the power generation layer 20 is a bendable structure and is clamped between the front plate 10 and the back plate 30. The power generation layer 20 can be single crystal silicon, polycrystalline silicon or thin film solar cells, etc., and the power generation layer 20 has a certain flexibility. Furthermore, the power generation layer 20 can also simultaneously form the crest portion 11 and the trough portion 12 so that the photovoltaic device 100 has a consistent structure and can also be conveniently installed to ensure the adaptability of the photovoltaic device 100 .

[0034] See also Figure 2The photovoltaic device 100 may also include a first adhesive layer 51 and a second adhesive layer 52. The first adhesive layer 51 may be a polyolefin (POE) layer or an ethylene-vinyl acetate copolymer (EVA) layer, etc., and the second adhesive layer 52 may also be a polyolefin layer or an ethylene-vinyl acetate copolymer layer, etc. Due to factors such as implementation requirements, the materials, dimensions, etc. of the first adhesive layer 51 and the second adhesive layer 52 may be the same or different. The polyolefin layer has high low temperature resistance, high chemical stability, high oil resistance and weather resistance, and is easy to be processed into various shapes and sizes. The polyolefin layer can improve the protection ability of the photovoltaic device 100 and prevent water vapor from entering from the gap between two adjacent layers. The ethylene-vinyl acetate copolymer layer has good softness, elasticity and low temperature resistance, and has good chemical stability and weather resistance. The ethylene-vinyl acetate copolymer layer also has good processing performance and is easy to hot-melt connect and solvent bond. It is selected and designed according to the specific implementation scenario and use requirements, and this embodiment does not limit it. The first adhesive layer 51 is connected between the front plate 10 and the power generation layer 20. The first adhesive layer 51 can be melted by heat, and when solidified later, the front plate 10 and the power generation layer 20 can be connected to each other, so that the front plate 10 and the power generation layer 20 are integrated. The second adhesive layer 52 is connected between the rear plate 30 and the power generation layer 20. The second adhesive layer 52 can be melted by heat, and when solidified later, the rear plate 30 and the power generation layer 20 can be connected to each other, so that the rear plate 30 and the power generation layer 20 are integrated. The integrity of the photovoltaic device 100 is ensured, and the protection capability and use safety of the photovoltaic device 100 are improved.

[0035] In this example, see Figure 2 as well as Figure 4The power generation layer 20 includes a plurality of cells 21 arranged in series. Sunlight can propagate to the cells 21, and the cells 21 can receive the light and convert it into current. The plurality of cells 21 can be electrically connected by cables, etc., so that the plurality of cells 21 can transmit current normally. Exemplarily, the cells 21 can be crystalline silicon cells. Crystalline silicon cells can utilize photoelectric materials to absorb light energy and then undergo photoelectron conversion reactions. Crystalline silicon cells have the advantages of high conversion efficiency and environmental protection. Crystalline silicon cells also have certain flexibility and are conveniently configured into a variety of different shapes, so that the cells 21 can be attached to the crest part 11 or the trough part 12. The cell 21 located in the trough part 12 is electrically connected to at least one diode 40, because the cell 21 is located in the trough part 12. Compared with the crest part 11, the trough part 12 has a lower level, and obstructions such as dust and leaves may accumulate in the trough part 12, thereby having a certain impact on the power generation efficiency of the cell 21 in the trough part 12. When the cell 21 in the trough 12 is working normally, the voltage is low, the circuit of the diode 40 is cut off, and the cell 21 can work normally. When the cell 21 is shielded, the power generation efficiency is low, its internal resistance increases, the voltage rises, and the circuit of the diode 40 is unidirectional. The two ends of the cell 21 can be short-circuited by the diode 40 in the trough 12, and then the current of other devices will be transmitted from the diode 40, and will not be consumed by the abnormally working cell 21, thereby ensuring the power generation efficiency of the photovoltaic device 100. The diode 40 is set corresponding to the trough 12, and the length of the connecting cable between the diode 40 and the cell 21 located in the trough 12 can also be reduced, shortening the current transmission length, and ensuring the safety of the photovoltaic device 100.

[0036] In another embodiment, the power generation layer 20 may also include an electrode layer and a current transmission layer. The current transmission layer is connected to the battery cell 21. The current transmission layer can be connected to the electrode layer by welding, conductive adhesive bonding or direct physical contact. One end of the electrode layer is electrically connected to the current transmission layer, and the other end can extend in the direction outside the photovoltaic device 100, and can be electrically connected to an energy storage device, an electrical device, etc. The current can be transmitted to other devices through the electrode layer for use by other devices. Furthermore, the photovoltaic device 100 may also include an interface, etc., and one end of the electrode layer away from the battery cell 21 is electrically connected to the interface, and the interface can be electrically connected to other devices, thereby increasing the connection firmness between the photovoltaic device 100 and other devices. Preferably, the current transmission layer can be arranged between the battery cell 21 and the back plate 30. The current transmission layer has a certain structural strength, which can help the power generation layer 20 resist bending and ensure the structural strength of the power generation layer 20.

[0037] In a more specific implementation, please continue to refer to Figure 4, each diode 40 is connected in parallel with a plurality of cells 21, for example, each diode 40 is connected in parallel with 2 or 4 cells 21. Further, a plurality of cells 21 are arranged in series with each other, and a diode 40 is arranged in parallel with a plurality of cells 21. The voltage across the diode 40 can be changed by adjusting the number of cells 21 connected to each diode 40, so that the voltage of the normally working cell 21 is below the conduction voltage of the diode 40. When one of the cells 21 is shielded, the voltage across the diode 40 rises, and the diode 40 can be quickly turned on, so that the opposite ends of the plurality of cells 21 are short-circuited. Then the current of the other cells 21 will be transmitted from the diode 40, and will not be consumed by the abnormally working cell 21, so that the cell 21 can be prevented from heating up, thereby ensuring the power generation efficiency of the photovoltaic device 100. Moreover, one diode 40 can ensure the normal operation of a plurality of cells 21, shorten the number of diodes 40, and reduce the maintenance of the diodes 40. The photovoltaic device 100 has a simple structure and can save costs.

[0038] In this example, see Figure 4 as well as Figure 5 The diode 40 may include a diode body 41, an insulating layer 42 and a connector 43. The diode body 41 may be made of a semiconductor material, and the diode body 41 may include a P-type semiconductor and an N-type semiconductor. The diode body 41 may also include two pins, one end of which is a positive electrode and the other end is a negative electrode. The connector 43 may be made of a metal material, such as a tinned copper strip, which has a certain structural strength and electrical conductivity. The diode body 41 and the connector 43 are both embedded in the insulating layer 42 to prevent the diode 40 from being short-circuited with the power generation layer 20. Further, the surface of the power generation layer 20 and the two poles of the diode 40 and the pins connecting the two poles can be prevented from being directly electrically connected, thereby ensuring the safety of the photovoltaic device 100. The two ends of the diode body 41 are electrically connected to a connector 43 respectively, and the positive and negative poles of the battery cell 21 are electrically connected to the connectors 43 at both ends of the diode body 41 respectively. In other words, one end of each connector 43 is electrically connected to the body of the diode 40, and the other end can be used to be electrically connected to the battery cell 21. Among them, the connector 43 and the battery cell 21 can be connected by ohmic contact or welding, and then the diode 40 can be set in parallel with the battery cell 21 through the connector 43. The connector 43 can ensure a stable connection between the diode 40 and the battery cell 21, ensuring the safe use of the photovoltaic device 100.

[0039] Preferably, the thickness of the diode 40 can be 0.5 mm-2 mm, which can prevent the thickness of the diode 40 from being too thick, affecting the connectivity between the power generation layer 20 and the rear plate 30, thereby ensuring the structural stability of the photovoltaic device 100. It can also prevent the thickness of the diode 40 from being too thin, which will affect its working power and working voltage, and ensure the normal flow of current.

[0040] In a more specific embodiment, see Figure 5 The insulating layer 42 can be, for example, polyimide or epoxy resin. Such materials have good insulating properties. The body of the diode 40 can be protected, and current can be prevented from directly contacting the PN junction or both ends of the diode 40 from the outside, thereby preventing short circuit or electrical breakdown. The insulating layer 42 is provided with a first through hole 431 and a second through hole 432, and the connectors 43 at both ends of the diode body 41 are exposed from the first through hole 431 and the second through hole 432, respectively. The positive and negative electrodes of the battery cell 21 extend into the first through hole 431 and the second through hole 432, respectively, and are electrically connected to the connector 43. The connector 43 can extend both ends of the diode 40, thereby ensuring a stable connection between the diode 40 and the power generation layer 20.

[0041] In the photovoltaic device 100 provided in the embodiment of the present application, the front plate 10 and the rear plate 30 are respectively attached to the opposite sides of the power generation layer 20, thereby improving the protection performance of the power generation layer 20 and improving the service life of the photovoltaic device 100. The front plate 10 has a crest portion 11 and a trough portion 12, and the front plate 10 can force the power generation layer 20 and the rear plate 30 to form corresponding crest portions 11 and trough portions 12. The photovoltaic device 100 with consistent crest portions 11 and trough portions 12 can be easily installed in a variety of different environments. And when the power generation layer 20 of the trough portion 12 is shielded, the internal resistance of the power generation layer 20 increases, and the voltage at both ends of the power generation layer 20 increases. When the voltage exceeds the conduction voltage of the diode 40, the diode 40 is unidirectionally conducted, and the conducted diode 40 can short-circuit the two ends of the power generation layer 20, avoiding the power generation layer 20 from wasting the power of other devices in the circuit, and reducing the working loss of the photovoltaic device 100.

[0042] The above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

Claims

1. A photovoltaic device, characterized in that: include: A front plate, wherein the front plate is configured as a wave-shaped structure, and the front plate includes wave crests and wave troughs that are alternately arranged; A power generation layer, the power generation layer is attached to the front plate; A rear plate, the rear plate being attached to a surface of the power generation layer away from the front plate; as well as A diode is connected in parallel with the power generation layer, the diode is arranged corresponding to the trough portion, and the diode is arranged between the power generation layer and the rear plate.

2. The photovoltaic device according to claim 1, characterized in that: The front plate is a hard structure, the rear plate and the power generation layer are both bendable structures, the power generation layer is attached to the front plate, and the rear plate is attached to the power generation layer.

3. The photovoltaic device according to claim 1, characterized in that: The front plate and the rear plate are both hard structures, the rear plate is configured as a wavy structure that matches the front plate, the front plate and the rear plate are arranged correspondingly, and the power generation layer is a bendable structure and is clamped between the front plate and the rear plate.

4. The photovoltaic device according to claim 2 or 3, characterized in that: The power generation layer includes a plurality of battery cells arranged in series, and the battery cells located in the trough portion are electrically connected to at least one of the diodes.

5. The photovoltaic device according to claim 4, characterized in that: The diode includes a diode body, an insulating layer and a connector. The diode body and the connector are both embedded in the insulating layer. The two ends of the diode body are respectively electrically connected to the connector. The positive and negative poles of the battery cell are respectively electrically connected to the connectors at the two ends of the diode body.

6. The photovoltaic device according to claim 5, characterized in that: The insulating layer is provided with a first through hole and a second through hole, the connectors at both ends of the diode body are exposed from the first through hole and the second through hole respectively, and the positive and negative electrodes of the battery cell are respectively extended into the first through hole and the second through hole to be electrically connected with the connectors.

7. The photovoltaic device according to claim 2 or 3, characterized in that: Each of the diodes is connected in parallel with a plurality of battery slices.

8. The photovoltaic device according to claim 7, characterized in that: Each of the diodes is connected in parallel with two or four battery cells.

9. The photovoltaic device according to claim 1, characterized in that: The thickness of the diode is 0.5 mm-2 mm.

10. The photovoltaic device according to claim 1, characterized in that: The photovoltaic device further includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is bonded between the front plate and the power generation layer, and the second adhesive layer is bonded between the rear plate and the power generation layer.

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