Photovoltaic module without main grid

Abstract

The utility model discloses a photovoltaic module without a main grid, which comprises a cleaning protection layer, a battery piece layer, a glue film layer and a back plate which are sequentially arranged from top to bottom, the periphery of the top surface of the battery piece layer is provided with a plurality of first mounting grooves at equal intervals, and the first mounting grooves are internally provided with first clamping grooves; first containing grooves corresponding to the first mounting grooves are formed in the side wall of the battery piece layer, second containing grooves are formed in the adhesive film layer, a plurality of second mounting grooves are formed in the periphery of the bottom face of the back plate at equal intervals, a plurality of second clamping grooves are formed in the second mounting grooves, and third containing grooves corresponding to the second mounting grooves are formed in the side wall of the back plate. And the cleaning protection layer, the first adhesive film layer, the battery piece layer, the second adhesive film layer and the back plate are in reinforced connection through connecting pieces. According to the main-grid-free photovoltaic module, the service life of the main-grid-free photovoltaic module is prolonged through cooperation of the cleaning protection layer, the battery piece layer and the back plate, meanwhile, all the layers are connected through the connecting pieces, mounting and dismounting are convenient, and the connecting stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of main gridless photovoltaic, especially to a main gridless photovoltaic module. BACKGROUND

[0002] In the field of photovoltaics, with the continuous development of technology, the requirements for component performance and reliability are increasingly improved. Traditional photovoltaic modules usually have a main grid structure, but this structure has certain limitations, for example, the main grid will block part of the light, affecting the light absorption efficiency of the cell, and thus limiting the improvement of the power generation performance of the module.

[0003] To overcome these problems, main gridless photovoltaic modules have emerged. However, due to the lack of main grid protection on the surface of main gridless modules, they face many challenges from the external environment. In desert areas where sand is rampant, areas with serious industrial pollution, and places where birds are active, modules are easily scratched and worn by sand, chemically corroded by acid rain, and contaminated by bird droppings. These adverse factors not only reduce the light transmittance of the module surface, preventing light from being fully absorbed by the cell, but also may erode the internal structure of the module, shortening its service life.

[0004] At the same time, main gridless photovoltaic modules also face challenges in structural stability. Compared to traditional modules, the connection between the cell and the interconnection structure, as well as the connection between the layers of the encapsulation structure, needs to be more delicate and stable to ensure efficient transmission of current and mechanical strength of the overall module. How to design a main gridless photovoltaic module that can withstand harsh external environments and ensure stable and reliable internal structure has become a key problem that needs to be solved in the development of current photovoltaic technology. SUMMARY

[0005] To solve the related technical problems, the purpose of the utility model is to provide a main gridless photovoltaic module to solve the above problems.

[0006] To achieve the above purpose, the utility model embodiment adopts the following technical solutions:

[0007] A main gridless photovoltaic module includes a cleaning protection layer, a cell layer, a film layer, and a backboard arranged from top to bottom.

[0008] The top surface of the cell layer is provided with a plurality of first installation slots at equal distances, and the inside of the first installation slot is provided with a first clamping slot. The side wall of the cell layer is provided with a first accommodating slot corresponding to the first installation slot, and the first end of the first accommodating slot is connected to the second end of the first installation slot.

[0009] The film layer is provided with a second accommodating slot, and the first end of the second accommodating slot is connected to the second end of the first accommodating slot.

[0010] A plurality of second installation grooves are equidistantly arranged on the bottom periphery of the back plate, a plurality of second clamping grooves are arranged in the second installation grooves, a third accommodating groove is arranged on the side wall of the back plate and corresponds to the second installation groove, the first end of the third accommodating groove is connected to the second accommodating groove, and the second end of the third accommodating groove is connected to the second installation groove,

[0011] The cleaning protective layer, the first adhesive film layer, the battery piece layer, the second adhesive film layer and the back plate are provided with connecting pieces, the first end of the connecting piece is clamped in the first clamping groove, the second end of the connecting piece is clamped in the second clamping groove, and the connecting part of the connecting piece is arranged in the first accommodating groove, the second accommodating groove and the third accommodating groove.

[0012] Optionally, the cleaning protective layer comprises a nano ceramic coating, and a hydrophobic material is further arranged in the nano ceramic coating.

[0013] Optionally, the cleaning protective layer comprises a nano ceramic coating and a fluorocarbon compound coating, the nano ceramic coating is arranged on the battery piece layer, and the fluorocarbon compound coating is arranged on the nano ceramic coating.

[0014] Optionally, the top periphery of the battery piece layer is provided with a fence to form an accommodating cavity with an open top, and the cleaning protective layer is arranged in the accommodating cavity.

[0015] Optionally, a gap is arranged on the fence to avoid the first end of the connecting piece.

[0016] Optionally, the connecting piece comprises a first clamping part, a second clamping part and a connecting part, and the first clamping part and the second clamping part are symmetrically arranged at the two ends of the connecting part.

[0017] Optionally, the first clamping part comprises a first guide part and a first protrusion, the first guide part is arranged in the first installation groove, and the first protrusion is arranged in the first clamping groove; the second clamping part comprises a second guide part and a second protrusion, the second guide part is arranged in the second installation groove, and the second protrusion is arranged in the second clamping groove.

[0018] Optionally, the connecting piece is in the shape of "[".

[0019] Compared with the prior art, the utility model discloses a kind of main grid-free photovoltaic modules provided by the utility model have by cooperating in cleaning protective layer, battery piece layer and back plate, improve the service life of main grid-free photovoltaic module, simultaneously, each layer is connected using connecting piece, it is convenient to install and disassemble, improve the connection stability;First clamping groove is arranged in the first installation groove and second clamping groove is arranged in the second installation groove, cooperate connecting piece, improve the connection stability of each layer directly;By the setting of first accommodating groove, second accommodating groove and third accommodating groove, it is convenient to install connecting piece, reduce the probability of connecting piece drop, improve the stability of connecting piece installation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate and understand the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the background of the present application and the embodiments description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the contents of the embodiments of the present application and these drawings without creative labor.

[0021] Fig. 1 is a structural schematic diagram of a main grid-free photovoltaic module provided by the embodiments of the present application;

[0022] Fig. 2 is a top view of a cell layer of the main grid-free photovoltaic module provided by the embodiments of the present application;

[0023] Fig. 3 is a bottom view of a back plate of the main grid-free photovoltaic module provided by the embodiments of the present application;

[0024] Fig. 4 is a structural schematic diagram of a connecting piece of the main grid-free photovoltaic module provided by the embodiments of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below with reference to the drawings.

[0026] In order to facilitate the understanding of the present application, the present application will be more comprehensively described below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art of the technology to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] Please refer to Figs. 1 to 4As shown, the embodiment provides a main grid-free photovoltaic module, which comprises a cleaning protection layer 10, a cell piece layer 20, a film layer 30 and a back plate 40 arranged in sequence from top to bottom. The top surface periphery of the cell piece layer 20 is provided with a plurality of first mounting grooves 21. The inside of the first mounting groove 21 is provided with a first clamping groove 22. The sidewall of the cell piece layer 20 is provided with a first accommodating groove 23 corresponding to the first mounting groove 21. The first end of the first accommodating groove 23 is connected to the first mounting groove 21. The sidewall of the film layer 30 is provided with a second accommodating groove 31. The first end of the second accommodating groove 31 is connected to the second end of the first accommodating groove 23. The bottom surface periphery of the back plate 40 is provided with a plurality of second mounting grooves 41. The inside of the second mounting groove 41 is provided with a plurality of second clamping grooves 42. The sidewall of the back plate 40 is provided with a third accommodating groove 43 corresponding to the second mounting groove 41. The first end of the third accommodating groove 43 is connected to the second accommodating groove 31. The second end of the third accommodating groove 43 is connected to the second mounting groove 41. The cleaning protection layer 10, the first film layer 30, the cell piece layer 20, the second film layer 30 and the back plate 40 are provided with a connecting piece 50. The first end of the connecting piece 50 is clamped in the first clamping groove 22. The second end of the connecting piece 50 is clamped in the second clamping groove 42. The connecting part 53 of the connecting piece 50 is arranged in the first accommodating groove 23, the second accommodating groove 31 and the third accommodating groove 43.

[0028] It can be seen that through the cooperation of the cleaning protection layer 10, the cell piece layer 20 and the back plate 40, the service life of the main grid-free photovoltaic module is improved. At the same time, the layers are connected by the connecting piece 50, which is convenient for installation and disassembly, and improves the connection stability.

[0029] As an embodiment, the cleaning protection layer 10 comprises a nano ceramic coating, and a hydrophobic material is further arranged in the nano ceramic coating.

[0030] Specifically, the hydrophobic material is mixed in the nano ceramic coating.

[0031] It can be seen that the cleaning protection layer 10 contains a nano ceramic coating and a hydrophobic material arranged inside. The nano ceramic coating has high hardness and good chemical stability, which can effectively resist wind and sand erosion and chemical corrosion. The hydrophobic material gives the coating a self-cleaning function, which can make rainwater form water droplets to carry away dust and other pollutants, keep the surface of the module clean, reduce the influence of dust on light absorption, and thus improve the power generation efficiency and service life of the module.

[0032] As an embodiment, the cleaning protection layer 10 comprises a nano ceramic coating and a fluorocarbon compound coating. The nano ceramic coating is arranged on the cell piece layer 20, and the fluorocarbon compound coating is arranged on the nano ceramic coating.

[0033] Specifically, the nano ceramic coating is first coated on the cell piece layer 20. After the nano ceramic coating solidifies, the fluorocarbon compound coating is applied on the nano ceramic coating.

[0034] It can be seen that the cleaning protection layer 10 is composed of a nanoceramic coating and a fluorocarbon compound coating. The nanoceramic coating provides good wear resistance and chemical stability to protect the internal structure of the component. The fluorocarbon compound coating is arranged on the nanoceramic coating to further enhance the hydrophobicity and self-cleaning ability, so that the gridless photovoltaic component can better maintain good optical performance and power generation efficiency in harsh environments.

[0035] As an embodiment, a surrounding 24 is arranged at the top periphery of the cell sheet layer 20 to form a top-open accommodating cavity, and the cleaning protection layer 10 is arranged in the accommodating cavity.

[0036] It can be seen that the surrounding 24 is arranged at the top periphery of the cell sheet layer 20 to form an accommodating cavity, and the cleaning protection layer 10 is arranged in the accommodating cavity, which plays a positioning and protection role for the cleaning protection layer 10, enhances the bonding tightness between the cleaning protection layer 10 and the cell sheet layer 20, and prevents external impurities from entering the interior of the component from the side, thereby improving the sealing performance and reliability of the component.

[0037] As an embodiment, a notch 25 is arranged on the surrounding 24 to avoid the first end of the connecting piece 50.

[0038] It can be seen that the notch 25 is arranged on the surrounding 24 to avoid the first end of the connecting piece 50, which avoids interference between the connecting piece 50 and the surrounding 24 during installation, ensures smooth installation of the connecting piece 50, and thus ensures stable connection between the layers of the component and maintains the structural stability of the gridless photovoltaic component as a whole.

[0039] As an embodiment, the connecting piece 50 includes a first clamping part 51, a second clamping part 52, and a connecting part 53, and the first clamping part 51 and the second clamping part 52 are symmetrically arranged at both ends of the connecting part 53.

[0040] It can be seen that the connecting piece 50 includes the first clamping part 51 and the second clamping part 52 symmetrically arranged at both ends of the connecting part 53, so that the connecting piece 50 is uniformly stressed when connecting the cleaning protection layer 10 and the backboard 40, and can better tightly connect the layers of the component together, thereby improving the overall structural strength and stability of the gridless photovoltaic component.

[0041] As an embodiment, the first clamping part 51 includes a first guide part 510 and a first protrusion 511, the first guide part 510 is arranged in the first mounting groove 21, and the first protrusion 511 is arranged in the first clamping groove 22; the second clamping part 52 includes a second guide part 520 and a second protrusion 521, the second guide part 520 is arranged in the second mounting groove 41, and the second protrusion 521 is arranged in the second clamping groove 42.

[0042] It can be seen that by setting the first guide part 510 and the first protrusion 511 and the second guide part 520 and the second protrusion 521, the connecting piece 50 can be precisely inserted into the first mounting groove 21 and the second mounting groove 41, and the close fit of the first protrusion 511, the second protrusion 521, the first clamping groove 22 and the second clamping groove 42 further enhances the firmness of the connection.

[0043] As an embodiment, the connecting piece 50 is in the shape of "[".

[0044] It can be seen that the internal space of the busbar-free photovoltaic module is reasonably utilized, so that the structure of the busbar-free photovoltaic module is more compact, and the integration and overall stability of the busbar-free photovoltaic module are improved.

[0045] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixedly connected, or can be detachably connected, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0046] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above examples. Without departing from the spirit and scope of the present application, various changes and modifications can be made to the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A gridless photovoltaic module, characterized in that, The gridless photovoltaic module includes, from top to bottom, a cleaning and protective layer, a cell layer, an encapsulating film layer, and a backsheet. The cell layer has multiple first mounting slots equidistantly arranged on its top periphery, each first mounting slot containing a first snap-fit ​​groove. A first receiving groove is formed on the sidewall of the cell layer corresponding to the first mounting slot, with its first end abutting the first mounting slot. A second receiving groove is formed on the encapsulating film layer, with its first end connecting to the second end of the first receiving groove. The backsheet has multiple second mounting slots equidistantly arranged on its bottom periphery. The second mounting slot has multiple second snap-fit ​​slots inside. The side wall of the back plate has a third receiving slot corresponding to the second mounting slot. The first end of the third receiving slot is connected to the second receiving slot, and the second end of the third receiving slot is connected to the second mounting slot. The cleaning and protective layer, the first adhesive film layer, the battery cell layer, the second adhesive film layer, and the back plate are provided with connectors. The first end of the connector is snapped into the first snap-fit ​​slot, and the second end of the connector is snapped into the second snap-fit ​​slot. The connecting parts of the connectors are all located in the first receiving slot, the second receiving slot, and the third receiving slot.

2. The gridless photovoltaic module according to claim 1, characterized in that, The cleaning and protective layer includes a nano-ceramic coating, and the nano-ceramic coating also contains a hydrophobic material.

3. A gridless photovoltaic module according to claim 2, characterized in that, The cleaning and protective layer includes a nano-ceramic coating and a fluorocarbon compound coating. The nano-ceramic coating is disposed on the battery cell layer, and the fluorocarbon compound coating is disposed on the nano-ceramic coating.

4. A gridless photovoltaic module according to claim 1, characterized in that, The top periphery of the battery cell layer is provided with a barrier to form a receiving cavity with a top opening, and the cleaning and protective layer is disposed inside the receiving cavity.

5. A gridless photovoltaic module according to claim 4, characterized in that, The fence has a notch to avoid the first end of the connector.

6. A gridless photovoltaic module according to claim 1, characterized in that, The connector includes a first snap-fit ​​portion, a second snap-fit ​​portion, and a connecting portion, with the first snap-fit ​​portion and the second snap-fit ​​portion symmetrically arranged at both ends of the connecting portion.

7. A gridless photovoltaic module according to claim 6, characterized in that, The first snap-fit ​​portion includes a first guide portion and a first protrusion. The first guide portion is disposed in the first mounting groove, and the first protrusion is disposed in the first snap-fit ​​groove. The second snap-fit ​​portion includes a second guide portion and a second protrusion. The second guide portion is disposed in the second mounting groove, and the second protrusion is disposed in the second snap-fit ​​groove.

8. A gridless photovoltaic module according to claim 1, characterized in that, The connector is in the shape of "[".

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