CN104979415A - Solar photovoltaic cell assembly protected by back plate tempered glass - Google Patents

Abstract

The invention provides a solar photovoltaic cell assembly protected by the back plate tempered glass, and belongs to the technical field of solar photovoltaic assemblies. The solar photovoltaic cell assembly comprises a solar photovoltaic cell assembly body. The solar photovoltaic cell assembly body comprises a panel, a silicon wafer plate, a back plate and a back plate protective plate. The solar photovoltaic cell assembly is characterized in that a sealing rubber strip is arranged to surround the peripheral edge part of the solar photovoltaic cell assembly body. Meanwhile, the four corners of the solar photovoltaic cell assembly body are respectively provided with a corner protective member. By means of the four corner protective members, the panel, the silicon wafer plate, the back plate and the back plate protective plate are mutually combined as one piece. According to the technical scheme of the invention, the overall mechanical strength of the solar photovoltaic cell assembly is improved, and the solar photovoltaic cell assembly is longer in service life. The solar photovoltaic cell assembly is convenient in inspection and maintenance, and the long-term stable operation of the solar photovoltaic cell assembly is ensured. The generation of virtual seams between the layers of the solar photovoltaic cell assembly is avoided, so that the service life of the solar photovoltaic cell assembly is not influenced at all. During the packaging, warehousing, transporting and installing process, the solar photovoltaic cell assembly is well protected by the back plate tempered glass. Meanwhile, the solar photovoltaic cell assembly is prevented from getting aged, and is convenient to machine, good in elasticity and excellent in restorative property. The back plate tempered glass can be in good contact with the solar photovoltaic cell assembly body and the clamping force between the back plate tempered glass and the solar photovoltaic cell assembly body is strong.

Description

Solar photovoltaic cell module protected by tempered glass on the back panel

technical field

The invention belongs to the technical field of solar photovoltaic components, and in particular relates to a solar photovoltaic cell component protected by tempered glass on the back plate.

Background technique

The solar photovoltaic cell assembly mentioned above refers to a solar photovoltaic cell assembly without a mounting frame, that is, without a frame. With the increasing awareness of human energy conservation and environmental protection, as well as the protection awareness of non-renewable natural energy such as oil, coal, natural gas and even sea ice, as an inexhaustible clean new energy source, solar energy is becoming more and more important. The more it is valued by all mankind, the application of solar photovoltaic power generation systems continues to expand. Solar photovoltaic cell modules are an important part of a complete set of solar photovoltaic systems, and their function is to use the photovoltaic effect to directly convert solar energy into electrical energy.

As known in the industry, the life of solar photovoltaic cell components is closely related to the materials used in them. In the structural system of solar photovoltaic cell modules, the service life of plastic components is often the shortest. The back sheet is an important part of the solar photovoltaic cell module. However, because the material of the back sheet is plastic, it is easy to cause aging, deformation, cracking, etc. after a period of use, so that the entire solar photovoltaic cell module cannot meet the design requirement of 25 years. life expectancy requirements. In addition, ice and snow loads, ambient temperature changes, wind loads, etc. will also cause mechanical pressure on solar photovoltaic cell components, shrinkage and stretching caused by thermal expansion and contraction coefficients, and eventually lead to material fatigue of solar photovoltaic cell components, in addition to backplane damage In addition, the battery connection strip made of copper wire, that is, the electrical connection strip of the electrical connection mechanism, will also break due to repeated bending and tossing, resulting in an open circuit of the solar panel or attenuation of power generation, or even a short circuit.

There is no lack of technical information about solar photovoltaic cell components in the published Chinese patent literature, such as CN102064218B (solar cell component structure), CN102136504B (a solar cell component and its application), CN202120950U (a frameless BIPV solar cell component), CN102544162B (a solar cell module) and CN203325929U (a frameless solar cell module with H-shaped structure), etc.

Typically, such as "a solar cell module" recommended by the invention patent publication number CN104638041A and "a flexible crystalline silicon solar cell module" provided by CN103928553A, these two patent application solutions do not have direct or indirect protection for the backplane Therefore, the backplane is prone to the technical problems mentioned above by the applicant during the actual use.

Invention Patent Publication No. CN101447521A introduces "a solar cell module that can replace roof tiles and its preparation method" and publication number CN102270684A discloses "a double-sided glass curtain wall solar cell module". These two patents are due to the use of tempered glass. Preventing the backplane from being in contact with the outside air has positive significance for prolonging the service life of the backplane.

Furthermore, as known in the industry, solar photovoltaic cell components are usually multi-layer structures, such as the surface layer from top to bottom (CN101447521A is a black polyvinyl fluoride composite film, CN102270684A is ordinary copperized glass), EVA layer, solar cell layer (also Silicon wafer plate), EVA layer and back plate layer (CN101447521A is high-strength low-iron tempered glass, CN102270684A is ultra-clear embossed tempered glass). During the service process, especially with the prolongation of the service life, coupled with the influence of natural factors, the following two technical problems, which are both undesirable but inevitable (only in terms of degree differences), will generally arise: First, due to the imperceptible generation of gaps between layers, outside humid air, fog, rain, etc. will invade the solar cell layer, and cause the light transmittance of the backsheet layer to decrease, reducing the photoelectric conversion efficiency; second, in view of the solar photovoltaic modules. The geometric shape is rectangular or cube, so the four corners become weak points, and the aforementioned interlaminar cracking often starts at the corners.

The utility model patent authorization announcement number CN202797048U discloses "a corner protector for a frameless solar cell module", which includes a partially enclosed internal space, an upper surface, a lower surface and two side surfaces for defining the internal space, wherein , the upper surface and the lower surface have the shape of a right triangle when viewed from above the surface, while the two side surfaces are at right angles, and the inner space has an opening for closely fitting with the corner of the frameless solar cell module on the side facing the right angle. This patent solution can objectively embody the technical effect recorded in paragraph 0008 of its description, that is, it can make up for the aforementioned second technical problem. However, there are the following shortcomings: First, according to paragraph 0018 of the manual, the corner protector is made of weather-resistant silicone elastomer, and die-casting is carried out using a flat vulcanizer at 170°C (the length of the right-angle side is 35.3mm, and the length of the two side surfaces 5.4㎜), it can be seen that this kind of corner protector is relatively fragile due to the use of rubber, and the production process is troublesome; second, because the upper surface and the lower surface of the plane are arc-shaped, it is compatible with the solar photovoltaic module. The contact is essentially tangential contact, and because the material of the corner piece is rubber, it is difficult to ensure the effect of positioning on the solar photovoltaic module for a long time; third, because the overall shape of the corner protector is L-shaped, it is difficult to make the two sides of the corner piece The intersection of the right-angled sides and the corners of the solar photovoltaic cell module maintain an ideal matching effect, which will affect the overall fit and sealing effect of the entire corner protector and the solar photovoltaic cell module to a certain extent; the fourth is due to structural reasons, so The elastic force is relatively weak, so the clamping force or clamping force on the solar photovoltaic module cannot meet the expectations of the industry, and there may even be a risk of loosening.

For above-mentioned prior art, it is necessary to improve, for this reason the applicant has made active and beneficial design, has formed the technical scheme that will introduce below and has carried out simulation test in the test center of the applicant under taking confidentiality measures , the results proved to be feasible.

Contents of the invention

The task of the present invention is to provide an excellent protection for the backboard, so that the backboard can meet the expected service life requirements, and it is beneficial to reflect the reliable sealing of the surrounding edge parts, so as to avoid the external moist air, fog and rainwater. Invade the interior and avoid premature aging of the back sheet, which is beneficial to achieve good positioning at the corners to avoid virtual seams between layers and reliably protect the solar photovoltaic cell module body protected by the back sheet tempered glass.

The task of the present invention is accomplished in this way, a solar photovoltaic cell assembly protected by tempered glass on the back plate includes a solar photovoltaic cell assembly body, the solar photovoltaic cell assembly body includes a panel, a silicon wafer plate, a back plate and a back plate protection plate, the panel is a toughened glass plate and is located above the silicon wafer plate, the back plate is a plastic back plate and is located below the silicon wafer plate, the back plate protection plate corresponds to the bottom of the back plate, and is characterized in that: surrounding the solar photovoltaic cell The surrounding edges of the module body are provided with sealing strips for sealing the gaps between the panel and the silicon wafer board, the silicon wafer board and the back board, and the back board and the back board protection board, and on the solar photovoltaic cell module body Each of the four corners is provided with a corner protector for combining the panel, the silicon wafer plate, the back plate and the back plate protection plate into a whole.

In a specific embodiment of the present invention, the back plate protection plate is an anti-ultraviolet tempered glass plate.

In another specific embodiment of the present invention, the tempered glass plate is a tempered glass plate with high light transmittance.

In yet another specific embodiment of the present invention, the light transmittance of the high light transmittance tempered glass plate is above 92%.

In yet another specific embodiment of the present invention, the corner protector is a metal corner protector, and the corner protector includes an elastic pressure plate, a supporting plate and a side plate, the elastic pressure plate and the supporting plate correspond to each other up and down, and the side plate constitutes The space formed between the elastic pressure plate and the supporting plate and enclosed by the elastic pressure plate, the supporting plate and the side plate constitutes the component body cavity, and the component body cavity faces one side of the solar photovoltaic cell component body. The side is formed as an opening and is fitted with the body of the solar photovoltaic cell assembly at a position corresponding to the corner of the solar photovoltaic cell assembly. The elastic pressure plate is composed of a first folded edge, a second folded edge and a third folded edge. One fold is connected to the upper edge of the side panel, the second fold is connected to the first fold, and the third fold is connected to the second fold, wherein: the first and second folds form a cross-sectional shape with each other It is in a ∧-shaped relationship, and the second and third folds form a V-shaped cross-sectional shape with each other. An elastic pressure plate isolation groove is formed on the elastic pressure plate and located at the corner of the elastic pressure plate. By means of the elastic pressure plate isolation groove An α angle and a β angle are formed at the corner portion of the elastic pressure plate.

In yet another specific embodiment of the present invention, the angles of the angle α and the angle β are equal.

In yet another specific embodiment of the present invention, the angles of the α angle and the β angle are both 45°.

In a further specific embodiment of the present invention, the metal corner protector is a stainless steel corner protector.

In yet another specific embodiment of the present invention, the cross-sectional shape of the sealant strip is C-shaped.

In yet another specific embodiment of the present invention, the sealing strip is silicone potting glue.

One of the technical effects of the technical solution provided by the present invention is that the overall mechanical strength of the solar photovoltaic cell module body with frameless structure can be improved due to the back plate protection plate corresponding to the bottom of the back plate, and the back plate can meet the requirements. The service life requirement of 25 years or more; second, because the sealing strips are set around the edges of the solar photovoltaic cell module body, it can prevent the external humid air, fog and rain from invading the silicon wafer plate and not only It helps to facilitate inspection and maintenance, and can ensure long-term stable operation; third, since corner protectors are provided at the four corners of the solar photovoltaic cell module body, it provides a basis for omitting the frame, so that the frameless post-increase The effective lighting area per unit area is enlarged, and the power generation capacity can be increased in the same installation area, and the corner protector ensures good positioning of the solar photovoltaic cell module body, avoiding the impact on the service life due to the generation of virtual seams between layers; Fourth, due to the setting of the corner protectors, it can play an excellent protective role in the links of packaging, storage, transportation and installation; fifth, because the corner protectors made of metal are not aging, easy to process, and elastic It has good restorability, good contact with the body of the solar photovoltaic cell module and strong clamping force, so the application on the frameless solar photovoltaic cell module has positive significance.

Description of drawings

Fig. 1 is the structural diagram of the embodiment of the solar photovoltaic cell assembly protected by the tempered glass of the back plate of the present invention

Fig. 2 is a schematic diagram of cooperation between the corner protector shown in Fig. 1 and the body of the solar photovoltaic cell module.

Detailed ways

In order to enable the examiners of the patent office, especially the public, to understand the technical essence and beneficial effects of the present invention more clearly, the applicant will describe in detail the following in the form of examples, but none of the descriptions to the examples is an explanation of the solutions of the present invention. Any equivalent transformation made according to the concept of the present invention which is merely formal but not substantive shall be regarded as the scope of the technical solution of the present invention.

In the following descriptions, all concepts related to the directionality (or orientation) of the top and bottom are for the position state of the picture being described, and the purpose is to facilitate the public's understanding, so it cannot be understood as Special limitations on the technical solutions provided by the present invention.

Referring to Fig. 1 and Fig. 2, a solar photovoltaic cell module body 1 whose geometric shape is substantially cuboid is provided, and the solar photovoltaic cell module body 1 includes a panel 11, a silicon wafer plate 12, a back plate 13 and a back plate protection plate 14. The panel 11 is a toughened glass plate and is located above the silicon wafer plate 12, the back plate 13 is a plastic back plate and is located below the silicon wafer plate 12, and the back plate protection plate 14 corresponds to the bottom of the back plate 13.

As the technical gist of the technical solution provided by the present invention: the surrounding edges of the solar photovoltaic cell module body 1 are provided with a set of devices for connecting between the panel 11 and the silicon wafer plate 12, and between the silicon wafer plate 12 and the back plate 13. The gap between the back plate 13 and the back plate protection plate 14 is sealed with a sealing strip 15, and each of the four corners of the solar photovoltaic cell module body 1 is provided with a panel 11, a silicon wafer plate 12, The back plate 13 and the back plate protection plate 14 are combined with each other into an integral corner protector 2 .

Preferably, the aforementioned back plate protection plate 14 is an anti-ultraviolet tempered glass plate, and the aforementioned tempered glass plate is a tempered glass plate with high light transmittance, and the light transmittance of the high light transmittance tempered glass plate is above 92%.

Please focus on Figure 2. The aforementioned corner protector 2 is a metal corner protector. The corner protector 2 includes an elastic pressure plate 21, a supporting plate 22 and a side plate 23. The space formed between the elastic pressure plate 21 and the support plate 22 and enclosed by the elastic pressure plate 21, the support plate 22 and the side plate 23 constitutes the component body cavity 24, and the component body cavity 24 faces the aforementioned One side of the solar photovoltaic cell assembly body 1 is formed as an opening and is fitted with the solar photovoltaic cell assembly body 1 at a position corresponding to the corner of the solar photovoltaic cell assembly 1, that is, inserted into the corner of the solar photovoltaic cell assembly body 1 . As shown in Figure 2, the aforementioned elastic pressure plate 21 is composed of a first folded edge 211, a second folded edge 212 and a third folded edge 213, the first folded edge 211 is connected with the upper edge of the side plate 23, and the second folded edge The edge 212 is connected with the first folded edge 211, and the third folded edge 213 is connected with the second folded edge 212, wherein: the first and second folded edges 211, 212 form a cross-sectional shape with each other in a ∧-shaped relationship, and the second 1. The third folded edges 212, 213 form a V-shaped cross-sectional shape with each other. On the elastic pressure plate 21 and at the corner of the elastic pressure plate 21, an elastic pressure plate separation groove 214 is formed. By means of the elastic pressure plate separation groove 214, The corners of the elastic pressing plate 21 form an α angle and a β angle. The elastic pressure plate isolation groove 214 cuts off the elastic pressure plate 21. For example, when the thickness of the elastic pressure plate 21 is 1mm-1.5mm, the elastic pressure plate isolation groove 214 is also 1mm-1.5mm. This structure can make the corner protector 2 Demonstrates excellent elasticity.

The aforementioned angle α and angle β are equal, that is, the angles of angle α and angle β are both 45°.

Preferably, the aforementioned metal corner protector is a stainless steel corner protector; the cross-sectional shape of the aforementioned sealing rubber strip 15 is C-shaped and the aforementioned sealing rubber strip 15 is silicone potting glue.

In summary, the technical solution provided by the present invention overcomes the deficiencies in the prior art, successfully completes the task of the invention, and faithfully embodies the technical effect described by the applicant in the above technical effect column.

Claims (10)

1. a kind of solar photovoltaic battery component of backboard toughened glass protection, comprise a solar photovoltaic battery component body (1), this solar photovoltaic battery component body (1) comprises panel (11), silicon wafer plate (12), backboard (13) and backboard baffle (14), panel (11) is for armorplate glass and be positioned at the top of silicon wafer plate (12), backboard (13) is for plastic back plate and be positioned at the below of silicon wafer plate (12), backboard baffle (14) is corresponding to the below of backboard (13), it is characterized in that: be provided with for described panel (11) and silicon wafer plate (12) around the position, edge of described solar photovoltaic battery component body (1), the sealing joint strip (15) closed is implemented in silicon wafer plate (12) and backboard (13) and the gap between backboard (13) and backboard baffle (14), and be respectively provided with one in four bights of solar photovoltaic battery component body (1) for making described panel (11), silicon wafer plate (12), backboard (13) and backboard baffle (14) are combined with one another to an overall corner protector (2).

2. the solar photovoltaic battery component of backboard toughened glass protection according to claim 1, is characterized in that described backboard baffle (14) is antiultraviolet armorplate glass.

3. the solar photovoltaic battery component of backboard toughened glass protection according to claim 1, is characterized in that described armorplate glass is the armorplate glass of high transmission rate.

4. the solar photovoltaic battery component of backboard toughened glass protection according to claim 3, is characterized in that the light transmittance of described high transmission rate armorplate glass is more than 92%.

5. the solar photovoltaic battery component of backboard toughened glass protection according to claim 1, it is characterized in that described corner protector (2) is metal protection corner part, this corner protector (2) comprises spring bearer plate (21), supporting plate (22) and side plate (23), spring bearer plate (21) and self correspondence of supporting plate (22), side plate (23) is formed between spring bearer plate (21) and supporting plate (22), and by spring bearer plate (21), the space that supporting plate (22) and side plate (23) three jointly enclose and formed is configured to the embedding chamber of component body (24), the embedding chamber of this component body (24) is configured to towards the side of described solar photovoltaic battery component body (1) uncovered and is corresponding to the position in bight and solar photovoltaic battery component body (1) scarf of solar photovoltaic battery component (1), described spring bearer plate (21) is by the first flanging (211), second flanging (212) and the 3rd flanging (213) are formed, first flanging (211) is upper along being connected with described side plate (23), second flanging (212) is connected with the first flanging (211), and the 3rd flanging (213) is connected with the second flanging (212), wherein: first, second flanging (211, 212) relation that shape of cross section is ∧ font is formed each other, and second, 3rd flanging (212, 213) relation that shape of cross section is in the shape of the letter V mutually is formed, spring bearer plate (21) is upper and the rotation angle position being positioned at spring bearer plate (21) is configured with a spring bearer plate isolation channel (214), a α angle and a β angle is formed at the rotation angle position of described spring bearer plate (21) by this spring bearer plate isolation channel (214).

6. the solar photovoltaic battery component of backboard toughened glass protection according to claim 5, is characterized in that described α angle is equal with the angle at β angle.

7. the solar photovoltaic battery component of the backboard toughened glass protection according to claim 5 or 6, is characterized in that the angle at described α angle and β angle is 45 °.

8. the solar photovoltaic battery component of backboard toughened glass protection according to claim 5, is characterized in that described metal protection corner part is stainless steel corner protector.

9. the solar photovoltaic battery component of backboard toughened glass protection according to claim 1, is characterized in that the shape of cross section of described sealing joint strip (15) is C font.

10. the solar photovoltaic battery component of the backboard toughened glass protection according to claim 1 or 9, is characterized in that described sealing joint strip (15) is organic silicon potting adhesive.