CN216528911U

CN216528911U - Laminate, photovoltaic module and photovoltaic system

Info

Publication number: CN216528911U
Application number: CN202122329197.1U
Authority: CN
Inventors: 陈诚; 沈灿军; 吕俊
Original assignee: Taizhou Longi Solar Technology Co Ltd
Current assignee: Taizhou Longi Solar Technology Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-05-13
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a laminating piece, a photovoltaic module and a photovoltaic system, and relates to the technical field of photovoltaic modules. To achieve the anti-PID and anti-UV purposes. The lamination piece comprises a glass cover plate, a first adhesive film layer, a titanium-doped quartz glass layer, a second adhesive film layer, a battery plate layer, a third adhesive film layer and a back plate which are sequentially stacked from top to bottom. The titanium-doped quartz glass layer at least covers the cell sheet included in the cell plate layer. The utility model also discloses a photovoltaic module applying the laminating part and a photovoltaic system applying the photovoltaic module.

Description

Laminate, photovoltaic module and photovoltaic system

Technical Field

The utility model relates to the technical field of photovoltaic modules, in particular to a laminated piece, a photovoltaic module and a photovoltaic system.

Background

The laminated part included in the photovoltaic module generally comprises a glass cover plate, an upper layer of packaging adhesive film, a battery plate, a lower layer of packaging adhesive film and a back plate which are sequentially stacked from top to bottom.

Wherein, the glass apron plays the effect of protection panel, but in practical application, when the glass apron exists broken risk when experiencing hail impact, at this moment, can further improve the risk that the conductive element on the panel (the conductive element here can include the main grid line on the panel, the solder strip that connects the main grid line electrically etc.) exposes outward, because of this, will take place the incident.

In addition, at present, in order to improve the light transmittance of the glass cover plate to improve the utilization rate of sunlight, the glass cover plate is generally a soda lime glass cover plate, and a large amount of Na is contained in the glass cover plate₂And O. In outdoor service, after water vapor invades the interior of the photovoltaic module, Na ions in the soda-lime glass cover plate can be separated out. Based on this, under the action of an electric field, Na ions migrate to the surface of the battery panel through the upper encapsulation film, which causes Potential Induced Degradation (PID), thereby reducing the performance of the photovoltaic module.

Moreover, in the outdoor service process of the component, ultraviolet band light contained in sunlight can penetrate through the glass cover plate to irradiate the battery plate and the organic material layer, wherein the organic material layer comprises an upper packaging adhesive film, a lower packaging adhesive film, a back plate and the like. This not only destroys the UV properties of the panel, but also promotes ageing of the organic material to reduce the encapsulation performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a laminated piece, a photovoltaic assembly and a photovoltaic system, so as to achieve the purposes of PID resistance and UV resistance.

In a first aspect, the present invention provides a laminate comprising, from top to bottom, a glass cover plate, a first adhesive film layer, a titanium-doped quartz glass layer, a second adhesive film layer, a battery plate layer, a third adhesive film layer, and a back plate, all of which are stacked in sequence. The titanium-doped quartz glass layer at least covers the cell sheet included in the cell plate layer.

Compared with the prior art, the glass cover plate and the titanium-doped quartz glass layer are laminated together by the first adhesive film layer, namely, the battery plate layer is protected by the double-layer structure. When the glass cover plate is impacted by the outside, the first adhesive film layer can play a role in buffering, so that impact force waves and risks of the titanium-doped quartz glass layer and the battery plate layer are effectively reduced, and the risk of hidden cracking of the battery plate layer is reduced.

In addition, the titanium-doped quartz glass layer plays a secondary protection role for the battery plate layer, namely when the glass cover plate is broken due to overlarge impact force, the titanium-doped quartz glass layer is less likely to be broken or damaged under the buffering action of the first adhesive film layer. At this time, even if the glass cover plate is crushed, the battery plate layer is not exposed to the outside under the secondary protection of the titanium-doped quartz glass layer which is not damaged.

When Na ions are separated out from the glass cover plate, under the action of an electric field, the Na ions migrate to the titanium-doped quartz glass layer through the first adhesive film layer, and titanium elements in the titanium-doped quartz glass layer have a certain adsorption effect on the Na ions. That is to say, the probability that Na ions reach the battery plate layer is effectively reduced by utilizing the blocking effect of the titanium element on the Na ions, so that the PID failure risk of the battery plate layer is reduced. In addition, Na ions themselves are also difficult to penetrate through the titanium-doped quartz glass layer, in which case the risk of PID failure of the cell plate layer due to Na ions reaching the cell plate layer can be further reduced.

Moreover, the titanium-doped quartz glass layer also has an ultraviolet blocking characteristic, and can effectively block ultraviolet rays from irradiating the second adhesive film layer, the cell panel layer, the third adhesive film layer and the back panel through the titanium-doped quartz glass layer, so that the risk of aging of the irradiated layer due to ultraviolet irradiation is reduced.

In one implementation, the titanium-doped quartz glass layer covers the entire cell plate layer. So set up, all cover the titanium doping quartz glass layer on the sensitive surface of whole panel, can furthest play the protection battery plate layer and do not receive external force to destroy to and reduce second rete, third rete and backplate because of receiving ultraviolet irradiation and take place ageing risk.

In one implementation, the cell plate layer comprises a plurality of cells arranged in a matrix, the titanium-doped quartz glass layer comprises a plurality of titanium-doped quartz glass sheets arranged in a matrix, and one titanium-doped quartz glass sheet covers one cell. So set up, utilize titanium doping quartz glass layer protection battery piece not receive external force to destroy to and reduce second glued membrane layer, third glued membrane layer and backplate and take place the ageing risk because of receiving ultraviolet irradiation, can also reduce the material cost of titanium doping quartz glass piece, and reduce the weight of lamination piece on the whole.

In one implementation, the titanium-doped quartz glass layer is a titanium dioxide-doped quartz glass layer.

In one implementation, the mass ratio of titanium dioxide in the titanium dioxide-doped quartz glass layer is between 0.04% wt and 0.1% wt. By such arrangement, the ultraviolet blocking effect of the titanium dioxide doped quartz glass layer and the adsorption effect on the precipitated Na ions can be optimized.

In one implementation, the glass cover plate and the titanium-doped quartz glass layer have a thickness ratio δ, δ being 2 ≦ δ ≦ 7.

As an example, the glass cover plate has a thickness T₁，2mm≤T₁Less than or equal to 3.5 mm. The thickness of the titanium-doped quartz glass layer is T₂，0.5mm≤T₂Less than or equal to 1 mm. Under the condition that the thickness of the glass cover plate is larger than that of the titanium-doped quartz glass layer, the risk that the glass cover plate is broken due to impact of external force can be reduced, and the risk that the titanium-doped quartz glass layer blocks sunlight is reduced. Based on this, can also not influence the utilization of battery plate layer to the sunlight when protecting battery plate layer, reducing PID inefficacy risk.

In one implementation, the glass cover plate is a tempered glass cover plate.

In a second aspect, the present invention further provides a photovoltaic module, which includes a laminated part and a frame clamped at the edge of the laminated part, wherein the laminated part is provided by the first aspect and/or any one implementation manner of the first aspect.

Compared with the prior art, the photovoltaic module provided by the utility model has the same beneficial effects as the laminating part in the technical scheme, and the details are not repeated here.

In a third aspect, the utility model also provides a photovoltaic system comprising the photovoltaic module provided in the second aspect of the utility model.

Compared with the prior art, the beneficial effects of the photovoltaic system provided by the utility model are the same as those of the photovoltaic module in the technical scheme, and the details are not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of a laminate according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another laminate provided in an embodiment of the present invention.

Reference numerals:

10-a glass cover plate, 11-a first adhesive film layer, 12-a titanium-doped quartz glass layer,

120-titanium doped quartz glass sheet, 13-second adhesive film layer, 14-cell plate layer,

15-third glue film layer, 16-back plate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve the technical problems in the prior art, in a first aspect, embodiments of the present invention provide a laminate. Fig. 1 shows a schematic structural diagram of a laminate provided by an embodiment of the present invention. As shown in fig. 1, the laminate includes a glass cover plate 10, a first adhesive film layer 11, a titanium-doped quartz glass layer 12, a second adhesive film layer 13, a battery plate layer 14, a third adhesive film layer 15, and a back plate 16, which are sequentially stacked from top to bottom. The titanium-doped quartz glass layer 12 covers at least the cell sheet comprised by the cell plate layer 14.

Referring to fig. 1, it should be understood that the first adhesive layer 11, the second adhesive layer 13 and the third adhesive layer 15 may be made of ethylene-vinyl acetate copolymer (EVA for short), Polyolefin elastomer (POE for short), or a combination of the two materials, or may be made of ionomer such as Polyvinyl Butyral (PVB) having strong adhesion and optical transparency.

Referring to fig. 1, the second adhesive film layer 13 and the third adhesive film layer 15 may be two independent adhesive film layers respectively covering the upper surface of the battery plate layer 14 and the lower surface of the battery plate layer 14, or the second adhesive film layer 13 and the third adhesive film layer 15 may be integrated into one adhesive film layer, and the battery plate layer 14 is wrapped in the adhesive film layer.

Referring to fig. 1, in practical application, when the edge of the laminate and the frame are clamped to form a photovoltaic module and the photovoltaic module is applied outdoors, when the laminate is impacted by a foreign object, the battery board layer 14 encapsulated inside can be simultaneously protected by the glass cover plate 10, the first adhesive film layer 11 and the titanium-doped quartz glass layer 12, wherein the glass cover plate 10 can resist the impact force of the foreign object, the first adhesive film layer 11 can play a role in buffering so as to effectively reduce the impact force wave and the titanium-doped quartz glass layer 12, and the titanium-doped quartz glass layer 12 can play a role in secondary protection. In addition, when the glass cover plate 10 is broken due to an excessive impact force, the titanium-doped quartz glass layer 12 is less likely to be broken or damaged by the buffering action of the first adhesive film layer 11. At this time, even if the glass cover plate 10 is crushed, the battery plate layer 14 is not exposed to the outside under the secondary protection of the titanium-doped quartz glass layer 12, which is not damaged. Based on this, the risk of impact force damaging the cell panel layer 14 may be reduced, and the service life of the photovoltaic module may be improved.

Referring to fig. 1, when Na ions are precipitated from the glass cover plate 10, under the action of an electric field, when the Na ions migrate into the titanium-doped quartz glass layer 12 through the first glue film layer 11, titanium elements in the titanium-doped quartz glass layer 12 have a certain adsorption effect on the Na ions. That is, the probability of Na ions reaching the battery plate layer 14 is effectively reduced by the blocking effect of the titanium element on Na ions, thereby reducing the risk of PID failure of the battery plate layer 14. In addition, Na ions themselves are also difficult to penetrate through the titanium-doped quartz glass layer 12, and in this case, the risk of PID failure of the cell plate layer 14 due to Na ions reaching the cell plate layer 14 can be further reduced.

Referring to fig. 1, the titanium-doped quartz glass layer 12 further has an ultraviolet blocking property, which can effectively block ultraviolet rays from irradiating the second adhesive film layer 13, the cell plate layer 14, the third adhesive film layer 15 and the back plate 16 through the titanium-doped quartz glass layer 12, thereby reducing the risk of aging of the irradiated layer due to ultraviolet irradiation.

Referring to fig. 1, as one possible implementation, a titanium-doped quartz glass layer 12 covers the entire cell plate layer 14. At this time, the area of the titanium-doped quartz glass layer 12 may be equal to the area of the glass cover plate 10 and the cell plate layer 14, and the titanium-doped quartz glass layer 12 may just completely cover the entire cell plate layer 14. In practical applications, gaps exist between the plurality of battery strings included in the battery plate layer 14 and between the battery sheets included in the battery strings. At this time, while the sunlight is absorbed and utilized by the cell, a part of the sunlight passes through the gap and finally radiates to the back plate 16. When the light-receiving surface of the entire cell plate layer 14 is completely covered with the titanium-doped quartz glass layer 12, the Na ions can be prevented from migrating to the cell plate layer 14 through the gap under the driving of the electric field, and simultaneously, the ultraviolet rays can be prevented from finally radiating to the back plate 16 through the gap, so as to reduce the risk of failure of the back plate 16 and the packaging adhesive film due to aging. In addition, under the condition of full coverage, the stress area of the titanium-doped quartz glass layer 12 can be increased, so that the function of protecting the battery plate layer 14 is furthest realized.

Referring to fig. 2, as a possible implementation manner, the cell plate layer 14 includes a plurality of cell plates distributed in a matrix, the titanium-doped quartz glass layer 12 includes a plurality of titanium-doped quartz glass plates 120 distributed in a matrix, and one titanium-doped quartz glass plate 120 covers one cell plate. That is, the titanium-doped quartz glass plate 120 is disposed only in the region of the cell plate, and one titanium-doped quartz glass layer 12 having a gap is formed from a plurality of titanium-doped quartz glass plates 120. With the arrangement, the titanium-doped quartz glass layer 12 is used for protecting the battery piece from being damaged by external force, and the material cost of the titanium-doped quartz glass piece 120 can be reduced while the aging risk of the second adhesive film layer 13, the third adhesive film layer 15 and the back plate 16 caused by ultraviolet irradiation is reduced, and the weight of the laminated piece is reduced as a whole.

Referring to fig. 1 and 2, as one possible implementation, the titanium-doped quartz glass layer 12 is a titania-doped quartz glass layer. It is to be understood that the titanium-doped quartz glass layer 12 may also be another quartz glass layer containing a titanium element doping having the same function as the titanium dioxide-doped quartz glass layer.

Referring to fig. 1 and 2, as a possible implementation, the mass ratio of titanium dioxide in the titanium dioxide-doped quartz glass layer 12 is 0.04% wt to 0.1% wt. For example, it may be 0.04% wt, 0.05% wt, 0.06% wt, or 0.1% wt, etc. It will be appreciated by those skilled in the art that the doping of the quartz glass with titanium dioxide reduces the thermal expansion coefficient of the quartz glass, i.e. the quartz glass is less prone to deformation at large temperature differences. However, the doping of titanium dioxide in the quartz glass also affects the light transmittance of the quartz glass. The mass ratio of the titanium dioxide is set to 0.04 wt% -0.1 wt%, so that the thermal expansion coefficient of the titanium dioxide quartz glass layer is effectively reduced, and meanwhile, the light transmittance of the titanium dioxide quartz glass layer can be ensured, so that the utilization rate of the battery plate layer 14 to sunlight is improved, and the output power is improved. Furthermore, the ultraviolet blocking effect of the titania-doped quartz glass layer 12 and the adsorption effect on the precipitated Na ions can be optimized, thereby reducing the aging risk of the laminate and reducing the PID failure risk.

Referring to FIGS. 1 and 2, in one possible implementation, the glass cover plate 10 and the titanium-doped quartz glass layer 12 have a thickness ratio δ, 2 ≦ δ ≦ 7. Under the condition that the thickness of the glass cover plate 10 is larger than that of the titanium-doped quartz glass layer 12, when the glass cover plate is impacted by a foreign object, the thicker glass cover plate 10 is matched with the buffer effect of the first glue film layer 11, so that the damage risk of the titanium-doped quartz glass layer 12 can be reduced to the maximum extent. Furthermore, in case the thickness of the titanium doped quartz glass layer 12 is smaller than the thickness of the glass cover plate 10, the difficulty of the packaging process of the laminate can be reduced. Moreover, the relatively thin titanium-doped quartz glass layer 12 may also improve the utilization of sunlight to increase the output power of the laminate with reduced blocking of sunlight.

Referring to fig. 1 and 2, as an example, the glass cover plate 10 has a thickness T₁，2mm≤T₁Less than or equal to 3.5 mm. The thickness of the titanium-doped quartz glass layer 12 is T₂，0.5mm≤T₂Less than or equal to 1 mm. E.g. T₁＝2mm，T₂0.5mm, or, T₁＝2.5mm，T₂0.8mm, or, T₁＝3.5mm，T₂1 mm. Under the condition that the thickness of the glass cover plate 10 is larger than that of the titanium-doped quartz glass layer 12, the risk that the glass cover plate 10 is broken due to external force impact can be reduced, and the risk that sunlight is blocked due to the additionally arranged titanium-doped quartz glass layer 12 is reduced. Based on this, while protecting the battery plate layer 14, reducing the risk of PID failure, can also not influence the utilization of the sunlight of battery plate layer 14.

Referring to fig. 1 and 2, as one possible implementation, the glass cover plate 10 is a tempered glass cover plate.

In a second aspect, the embodiment of the present invention further provides a photovoltaic module, which includes a laminated part and a frame clamped at an edge of the laminated part, where the laminated part is provided by the first aspect of the embodiment of the present invention and/or any implementation manner of the first aspect.

Compared with the prior art, the photovoltaic module provided by the embodiment of the utility model has the same beneficial effect as the laminating part in the technical scheme, and the details are not repeated here.

In a third aspect, an embodiment of the present invention further provides a photovoltaic system, including the photovoltaic module provided in the second aspect of the embodiment of the present invention.

Compared with the prior art, the beneficial effects of the photovoltaic system provided by the embodiment of the utility model are the same as those of the photovoltaic module in the technical scheme, and the details are not repeated here.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The laminated piece is characterized by comprising a glass cover plate, a first adhesive film layer, a titanium-doped quartz glass layer, a second adhesive film layer, a battery plate layer, a third adhesive film layer and a back plate which are sequentially stacked from top to bottom;

the titanium-doped quartz glass layer at least covers the cell sheet included in the cell plate layer.

2. The laminate of claim 1, wherein the titanium-doped quartz glass layer covers the entire cell plate layer.

3. The laminate of claim 1, wherein the battery plate layer comprises a plurality of battery pieces distributed in a matrix; the titanium-doped quartz glass layer comprises a plurality of titanium-doped quartz glass sheets distributed in a matrix manner, and one of the titanium-doped quartz glass sheets covers one of the cell sheets.

4. A laminate according to claim 1, characterized in that the titanium doped quartz glass layer is a titania doped quartz glass layer.

5. A laminate according to claim 1, characterized in that the glass cover plate and the titanium-doped quartz glass layer have a thickness ratio δ, 2 ≦ δ ≦ 7.

6. The laminate of claim 5, wherein the glass cover plate has a thickness T₁，2mm≤T₁Less than or equal to 3.5 mm; the thickness of the titanium-doped quartz glass layer is T₂，0.5mm≤T₂≤1mm。

7. A laminate according to any one of claims 1 to 6, wherein the glass cover plate is a toughened glass cover plate.

8. A photovoltaic assembly, which is characterized by comprising a laminated part and a frame clamped at the edge of the laminated part; the laminate is according to any one of claims 1 to 7.

9. A photovoltaic system comprising the photovoltaic module of claim 8.