Photovoltaic module and photovoltaic power generation system

Abstract

The utility model relates to the technical field of photovoltaic equipment, and discloses a photovoltaic assembly and a photovoltaic power generation system, and the photovoltaic assembly comprises a frame which comprises two first frames arranged at an interval along a first direction and two second frames arranged at an interval along a second direction, and the first frames and the second frames are connected end to end, a closed frame-shaped structure is defined by the two parts; the two end sides, in the first direction, of the laminating piece are connected with the two first frames correspondingly, and the two ends, in the second direction, of the laminating piece are connected with the top faces of the two second frames correspondingly; at least part of the structure of at least one end of the laminated part in the second direction protrudes out of the second frame; the first direction intersects the second direction. In the photovoltaic module, the part of the structure of at least one end of the laminated piece in the second direction extends out of the frame, and no seam exists between the edge of the part of the structure and the second frame, so that the surface of the laminated piece can be conveniently cleaned by natural wind power or rainwater and the like, and the problem of dust accumulation of the photovoltaic module is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic equipment technical field, concretely relates to a photovoltaic module and photovoltaic power generation system. BACKGROUND

[0002] The frame of the conventional photovoltaic module usually adopts a closed structure, and the laminated piece is completely embedded in the frame. However, the edge of the laminated piece is flush with or recessed from the frame, which causes dust to easily accumulate at the joint, affects the power generation efficiency, and is difficult to clean. SUMMARY

[0003] Therefore, the utility model provides a photovoltaic module and photovoltaic power generation system to solve the dust accumulation problem of the photovoltaic module.

[0004] In a first aspect, the utility model provides a photovoltaic module, which comprises: a frame comprising two first frames arranged at intervals along a first direction and two second frames arranged at intervals along a second direction, the first frames and the second frames being connected end to end to jointly form a closed frame structure; and a laminated piece, the two ends of the laminated piece along the first direction being connected to the two first frames, and the two ends of the laminated piece along the second direction being connected to the top surfaces of the two second frames; at least part of the structure of at least one end of the laminated piece along the second direction protruding from the second frame; and the first direction intersecting the second direction.

[0005] In this scheme, the laminated piece is connected to the top surface of the second frame, and at least one end of the laminated piece along the second direction protrudes from the second frame. In this way, part of the structure of the laminated piece extends to the outside of the frame, and the edge of this part of the structure does not have a joint with the second frame, which facilitates the use of natural wind power or rainwater to clean the surface of the laminated piece, effectively solving the dust accumulation problem of the photovoltaic module. In addition, compared with conventional photovoltaic modules, the length of the first frame is substantially shortened in this scheme, which saves materials and reduces costs.

[0006] In an optional embodiment, in the second direction, the length of the laminated piece protruding from the second frame is less than or equal to one fourth of the length of the laminated piece, to ensure the load resistance performance of the photovoltaic module and avoid problems such as stress concentration caused by excessive suspension.

[0007] In an optional embodiment, the utility model further comprises a sealing piece, which is wrapped around the outer circumferential side of at least part of the structure of the laminated piece protruding from the second frame, to increase the sealing performance and environmental erosion resistance of the laminated piece and improve the reliability of the photovoltaic module.

[0008] In an optional embodiment, the sealing piece is a metal foil layer, a water-resistant polymer layer, or a metal plate, to effectively block water vapor and dust from entering the inside of the laminated piece and ensure the sealing performance of the laminated piece.

[0009] In an alternative embodiment, the photovoltaic module further comprises a first adhesive, and the opposite sides of the two first frames are provided with mounting grooves; the two ends of the laminated component along the first direction are connected to the mounting grooves of the two first frames through the first adhesive respectively, so as to ensure the reliability and sealing of the connection between the laminated component and the first frame.

[0010] In an alternative embodiment, the first frame is further provided with at least one first overflow groove in communication with the mounting groove, and the first overflow groove is located above and / or below the mounting groove, so as to avoid insufficient or overflow of the adhesive and improve the connection strength and sealing.

[0011] In an alternative embodiment, the photovoltaic module further comprises a second adhesive, and the two ends of the laminated component along the second direction are connected to the top surfaces of the two second frames through the second adhesive respectively, so as to avoid a gap between the laminated component and the top surfaces of the second frames and ensure the reliability and sealing of the connection between the laminated component and the second frame.

[0012] In an alternative embodiment, the top surface of the second frame is concavely provided with at least one second overflow groove, so as to avoid insufficient or overflow of the adhesive and improve the connection strength and sealing.

[0013] In an alternative embodiment, the second overflow groove is a U-shaped groove extending along the first direction, and the bottom wall and the side wall of the U-shaped groove are transitioned by arc surfaces, so as to guide the flow of the adhesive and buffer the stress generated by thermal expansion and contraction or external impact, thereby improving the reliability of the structure.

[0014] In a second aspect, the utility model also provides a photovoltaic power generation system, comprising: the photovoltaic module as above. Since the photovoltaic power generation system of the utility model comprises the above photovoltaic module, it has the same technical effects as the photovoltaic module of the utility model, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0016] Figure 1 It is a top structure schematic view of the photovoltaic module of the utility model embodiment;

[0017] Figure 2 It is a bottom structure schematic view of the photovoltaic module of the utility model embodiment;

[0018] Figure 3 It is Figure 1A local enlarged schematic view of the middle A;

[0019] Figure 4 A cross-sectional view of a sealing element cooperating with a laminated element according to an embodiment of the present application;

[0020] Figure 5 A cross-sectional view of a first frame according to an embodiment of the present application;

[0021] Figure 6 A cross-sectional view of a second frame according to an embodiment of the present application.

[0022] Explanation of reference signs:

[0023] 1, first frame; 11, first support part; 111, mounting groove; 112, first overflow groove; 113, first cavity; 12, first extension part; 2, second frame; 21, second support part; 211, top surface; 212, second overflow groove; 213, second cavity; 22, second extension part; 3, laminated element; 4, sealing element; 5, first adhesive; 6, second adhesive; 7, third adhesive; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] The embodiments of the present application will be described below in conjunction with Figures 1 to 6 .

[0026] According to the embodiments of the present application, on the one hand, a photovoltaic module is provided, which comprises a frame and a laminated element 3 arranged on the frame.

[0027] Specifically, as shown in Figures 1-3 , the frame comprises two first frames 1 arranged at intervals along a first direction X and two second frames 2 arranged at intervals along a second direction Y, and the first frames 1 and the second frames 2 are connected end to end to jointly form a closed frame structure. Wherein, the first direction X intersects the second direction Y.

[0028] The angle of the first direction X and the second direction Y is not specifically limited, and it can be understood that the angle of the first direction X and the second direction Y depends on the specific structure of the frame, and the specific structure of the frame depends on the specific structure of the laminated piece 3. In some cases, the laminated piece 3 is rectangular, and the frame is a rectangular frame structure, at this time, the first direction X is perpendicular to the second direction Y, that is, the first frame 1 is perpendicular to the second frame 2.

[0029] It can be understood that the first frame 1 extends along the second direction Y, and the second frame 2 extends along the first direction X, and in some cases, the length of the first frame 1 in the second direction Y is greater than the length of the second frame 2 in the first direction X.

[0030] Further, the two ends of the laminated piece 3 along the first direction X are respectively connected with the two first frames 1, and the two ends of the laminated piece 3 along the second direction Y are respectively connected with the top surfaces 211 of the two second frames 2. At least part of the structure of at least one end of the laminated piece 3 along the second direction Y protrudes from the second frame 2.

[0031] As shown in Figure 1 and Figure 3 , at least part of the structure of the two ends of the laminated piece 3 along the second direction Y respectively protrudes from the two second frames 2. Alternatively, in an embodiment not shown in some figures, at least part of the structure of one end of the laminated piece 3 along the second direction Y respectively protrudes from the corresponding second frame 2. When installing the photovoltaic module, the end of the laminated piece 3 protruding from the second frame 2 is close to the installation base (such as the ground), so as to realize self-cleaning by using the natural environment and prevent dust accumulation.

[0032] The technical scheme of the utility model is applied, the laminated piece 3 is connected to the top surface 211 of the second frame 2, and at least one end of the laminated piece 3 along the second direction Y protrudes from the second frame 2. In this way, part of the structure of the laminated piece 3 extends to the outside of the frame, and the edge of the part of the structure does not have a joint with the second frame 2, which facilitates the use of natural wind power or rainwater to clean the surface of the laminated piece 3, effectively solves the dust accumulation problem of the photovoltaic module. In addition, compared with the conventional photovoltaic module, the length of the first frame 1 is substantially shortened, the material is saved, and the cost is reduced.

[0033] Further, in some embodiments, in the second direction Y, the length of the laminated piece 3 protruding from the second frame 2 is less than or equal to one fourth of the length of the laminated piece 3, which can ensure the load resistance performance of the photovoltaic module and avoid stress concentration and other problems caused by excessive suspension.

[0034] Specifically, as shown in Figure 2 , the length of the laminated piece 3 specifically refers to the setting size of the laminated piece 3 in the second direction Y, that is Figure 2the length L of the protruding part of the laminate 3 from the second frame 2 specifically refers to the setting dimension of the part of the laminate 3 protruding from the second frame 2 in the second direction Y, that is Figure 2 the length L1 of the protruding part of the laminate 3 from the second frame 2. It should be noted that L1 is only used to identify the length of the protruding part of the laminate 3 from the second frame 2, and does not mean that the lengths of the two ends of the laminate 3 protruding from the two second frames 2 in the second direction Y must be the same. For example, the two ends of the laminate 3 protrude from the two second frames 2 respectively in the second direction Y, and the lengths of the two ends of the laminate 3 protruding from the corresponding second frames 2 can be the same or different.

[0035] Further, in some embodiments, as shown in Figure 3 the photovoltaic module further comprises a sealing member 4, which is wrapped on the outer circumferential side of at least part of the structure of the laminate 3 protruding from the second frame 2, so as to increase the sealing property and environmental erosion resistance of the laminate 3, and improve the reliability of the photovoltaic module.

[0036] In some embodiments, the sealing member 4 can be a metal foil layer, that is, an aluminum foil or other metal foil is wrapped and fixed on the outer circumferential side of at least part of the structure of the laminate 3 protruding from the second frame 2, to form a metal foil layer.

[0037] Alternatively, in some embodiments, the sealing member 4 can be a water-resistant polymer layer, that is, a water-resistant polymer material is wrapped and fixed on the outer circumferential side of at least part of the structure of the laminate 3 protruding from the second frame 2, to form a water-resistant polymer layer.

[0038] Alternatively, in some embodiments, as shown in Figure 4 the sealing member 4 can be a metal plate, the two ends of the metal plate are bent and wrapped and fixed on the outer circumferential side of at least part of the structure of the laminate 3 protruding from the second frame 2 by the third adhesive 7. For example, the metal plate can be an aluminum plate, a stainless steel plate, etc. The third adhesive 7 can be a silicone adhesive or other adhesive, or a foam tape, a pressure-sensitive adhesive tape, etc., and is preferably a silicone adhesive.

[0039] In the above embodiments, by wrapping the metal foil layer, or the water-resistant polymer layer, or the metal plate on the part of the laminate 3 extending to the outside of the frame, water vapor and dust can be effectively blocked from entering the inside of the laminate 3, and the sealing property of the laminate 3 is ensured.

[0040] Further, Figure 5 a cross-sectional view of the first frame 1 in the third direction Z is shown, the third direction Z specifically refers to a direction perpendicular to the plane in which the first direction X and the second direction Y are located, and can also be understood as a height direction. In some embodiments, as shown in Figure 5As shown, the photovoltaic module further comprises a first adhesive 5, and each of the two first frames 1 is provided with a mounting groove 111 on the opposite side. The two ends of the laminated component 3 along the first direction X are respectively connected to the mounting grooves 111 of the two first frames 1 through the first adhesive 5, so as to ensure the reliability and sealing of the connection between the laminated component 3 and the first frame 1. Exemplarily, the first adhesive 5 can be an adhesive such as silicone, or can be a foam tape, a pressure-sensitive adhesive tape, etc., and is preferably silicone.

[0041] In some embodiments, the first frame 1 is further provided with at least one first overflow groove 112 in communication with the mounting groove 111, the first overflow groove 112 is located above and / or below the mounting groove 111, and the first overflow groove 112 extends along the second direction Y, so as to avoid insufficient or overflow of the adhesive, and improve the connection strength and sealing. Among them, the first overflow groove 112 can be provided through along the second direction Y, or can be provided non-through.

[0042] Exemplarily, the cross-sectional shape of the mounting groove 111 along the third direction Z is approximately "C" type, and the opening of the "C" type mounting groove 111 faces the other first frame 1 opposite to it. Exemplarily, as shown in Figure 5 As shown, the first overflow groove 112 can be provided with one, and is located above the mounting groove 111. Exemplarily, the first overflow groove 112 can be provided with two, and the two first overflow grooves 112 are respectively arranged above and below the mounting groove 111.

[0043] More specifically, in some embodiments, the first frame 1 comprises a first support portion 11 and a first extension portion 12 which are perpendicular and connected, and the mounting groove 111 is arranged at one end of the first support portion 11 away from the first extension portion 12. Among them, the cross-sectional shape of the first support portion 11 and the first extension portion 12 along the third direction Z is approximately "L" type, so as to ensure the load resistance performance of the first frame 1.

[0044] Exemplarily, one end of the first support portion 11 close to the first extension portion 12 is provided with a first cavity 113, so as to reduce the overall weight of the photovoltaic module and meet the lightweight demand. Exemplarily, the first cavity 113 can be provided through along the second direction Y, or can be provided non-through; the cross-sectional shape of the first cavity 113 along the third direction Z can be rectangular, trapezoidal, circular or other shapes, and is preferably rectangular, so as to maximize the weight reduction of the first frame 1. Exemplarily, at least one reinforcing rib can be arranged on the inner wall of the first cavity 113, so as to ensure the structural strength of the first frame 1.

[0045] Further, Figure 6The first frame 1 is shown in the cross-sectional view in the third direction Z. In some embodiments, the photovoltaic module further comprises a second glue 6. The two ends of the laminated piece 3 along the second direction Y are connected to the top surface 211 of the two second frames 2 through the second glue 6 respectively, so as to avoid the gap between the laminated piece 3 and the top surface 211 of the second frame 2, and ensure the reliability and sealing of the connection between the laminated piece 3 and the second frame 2. Exemplarily, the first glue 5 can be an adhesive such as silicone glue, or can be a foam tape, a pressure-sensitive adhesive tape, etc., and is preferably silicone glue.

[0046] In some embodiments, the top surface 211 of the second frame 2 is concavely provided with at least one second glue overflow groove 212 extending along the first direction X, so as to avoid insufficient or overflow of the glue, and improve the connection strength and sealing. The second glue overflow groove 212 can be through or non-through along the first direction X. In some embodiments not shown, the second glue overflow groove 212 can also be provided with multiple ones spaced apart. The multiple second glue overflow grooves 212 extend along the first direction X and are spaced apart in the second direction Y.

[0047] In some embodiments, the second glue overflow groove 212 can be a U-shaped groove extending along the first direction X, and the bottom wall and the side wall thereof adopt arc surfaces for transition, so as to facilitate the flow of the glue, and can buffer the stress generated by thermal expansion and contraction or external impact, and improve the reliability of the structure. Of course, in some embodiments not shown, the second glue overflow groove 212 can also be a right-angled groove, a trapezoidal groove, a V-shaped groove, a combined groove, etc.

[0048] More specifically, in some embodiments, the second frame 2 comprises a second support part 21 and a second extension part 22 connected perpendicularly, and the end surface of the second support part 21 away from the second extension part 22 forms the top surface 211 of the second frame 2. The cross-sectional shape of the second support part 21 and the second extension part 22 in the third direction Z is substantially L-shaped, so as to ensure the load resistance performance of the second frame 2.

[0049] Exemplarily, one end of the second support part 21 close to the second extension part 22 is provided with a second cavity 213, so as to reduce the overall weight of the photovoltaic module and meet the lightweight requirement. The second cavity 213 can be through or non-through along the first direction X. The cross-sectional shape of the second cavity 213 in the third direction Z can be rectangular, trapezoidal, circular or other shapes, and is preferably rectangular. Exemplarily, at least one reinforcing rib can be provided on the inner wall of the second cavity 213, so as to ensure the structural strength of the second frame 2.

[0050] Furthermore, the laminate 3 includes glass, an adhesive film, a battery cell, and a backplate stacked sequentially from top to bottom. It should be noted that the glass is located at the top of the laminate 3, and the backplate is located at the bottom of the laminate 3. The backplate is used to connect with the top surface 211 of the second frame 2.

[0051] According to an embodiment of this utility model, another aspect provides a photovoltaic power generation system, which includes the aforementioned photovoltaic modules. Multiple photovoltaic modules are arranged in an array through a reasonable electrical connection method to convert solar energy into electrical energy, providing power to users. Because individual photovoltaic modules have excellent dust-proof and sealing properties, the stability and power generation efficiency of the entire photovoltaic power generation system are effectively guaranteed, reducing maintenance costs and the probability of failure, and improving the economic benefits and reliability of the photovoltaic power generation system.

[0052] The photovoltaic modules and photovoltaic power generation system of this invention have good dust-proof and sealing performance. Their low maintenance requirements and high sealing performance make them suitable for high dust and high humidity environments such as deserts and coastal areas.

[0053] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A photovoltaic module, characterized in that, include: The frame includes two first frame (1) spaced apart along a first direction (X) and two second frame (2) spaced apart along a second direction (Y). The first frame (1) and the second frame (2) are connected end to end to enclose a closed frame structure. A laminate (3) is connected to two first frame (1) at both ends along the first direction (X) and to the top surface (211) of two second frame (2) at both ends along the second direction (Y); at least a portion of the structure of at least one end of the laminate (3) along the second direction (Y) protrudes from the second frame (2). The first direction (X) intersects with the second direction (Y).

2. The photovoltaic module according to claim 1, characterized in that, In the second direction (Y), the length of the laminate (3) protruding from the second frame (2) is less than or equal to one-quarter of the length of the laminate (3).

3. The photovoltaic module according to claim 1, characterized in that, It also includes a seal (4) that covers the outer periphery of at least a portion of the structure of the laminate (3) that protrudes from the second frame (2).

4. The photovoltaic module according to claim 3, characterized in that, The sealing element (4) is a metal foil layer, a water-resistant polymer layer, or a metal plate.

5. The photovoltaic module according to any one of claims 1-4, characterized in that, The photovoltaic module also includes a first colloid (5), and each of the two first frames (1) has a mounting groove (111) on one side opposite to the other; the laminate (3) is connected to the mounting groove (111) of the two first frames (1) at both ends along the first direction (X) through the first colloid (5).

6. The photovoltaic module according to claim 5, characterized in that, The first frame (1) is further provided with at least one first overflow groove (112) communicating with the mounting groove (111), the first overflow groove (112) being located above and / or below the mounting groove (111).

7. The photovoltaic module according to any one of claims 1-4, characterized in that, The photovoltaic module also includes a second colloid (6), and the two ends of the laminate (3) along the second direction (Y) are respectively connected to the top surfaces (211) of the two second frames (2) through the second colloid (6).

8. The photovoltaic module according to claim 7, characterized in that, The top surface (211) of the second frame (2) is recessed with at least one second overflow groove (212).

9. The photovoltaic module according to claim 8, characterized in that, The second overflow groove (212) is a U-shaped groove extending along the first direction (X).

10. A photovoltaic power generation system, characterized in that, include: The photovoltaic module as described in any one of claims 1 to 9.

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