CN107154441A - A kind of photovoltaic module - Google Patents

Abstract

The invention discloses a kind of photovoltaic module, including：Face glass, back-panel glass, support column, solar cell, it is characterised in that：The encapsulating material in lining core is encapsulated in including lining core, thin film cell layer and between lining core and thin film cell layer and by thin film cell layer；The thin film cell layer includes dorsum electrode layer, electric layer, transparency conducting layer and the transparent flexible substrate for covering setting successively from the inside to the outside；The encapsulating material is placed on outside lining core, and the two is the stereochemical structure of the consistent non-tablet of shape；It is straggly respectively on the dorsum electrode layer, electric layer and transparency conducting layer to be etched with the 3rd insulation tank, the second insulation tank and the first insulation tank；Wherein, the face glass and the edge edge sealing of the back-panel glass are handled, so as to form closed cavity between the face glass and the back-panel glass, the closed cavity is vacuumized, so that the closed cavity is vacuum chamber.Above-mentioned photovoltaic module is while with preferable translucency, also with preferable thermal insulation.

Description

A photovoltaic module

technical field

The invention relates to new energy technology, in particular to a photovoltaic module.

Background technique

As modern buildings have higher and higher requirements for energy saving and environmental protection, photovoltaic modules have received more attention as building materials. At present, the photovoltaic modules used for photovoltaic building integration are mainly double-glass modules, that is, the backplane of photovoltaic modules is glass. The double glass module has good light transmission and can ensure indoor lighting when used as a curtain wall.

However, because glass is easy to conduct heat, the thermal insulation performance of double-glass modules is poor. Therefore, when double-glass components are used as building curtain walls, it is easy to cause the temperature in the building to rise, thereby affecting people's experience.

In the prior art, it is known that BIPV is an important application of thin-film solar cells. It combines the power generation of solar cells with the functions of building exterior walls, and installs solar cell components on buildings to make them act as solar cells. to the dual purpose of generating electricity and replacing building materials. In areas where land is expensive, BIPV is the best solution to solve the high cost of land and integrate power generation and transportation. The construction industry has begun to use thin-film solar cells because it can generate electricity and reduce carbon dioxide emissions, which is a new trend in the future. In this regard, thin-film solar cells have unlimited potential. Depending on the installation location, there are many types of building integrated photovoltaics, such as combining with the roof, combining with the exterior wall, combining with the sunshade device, and using it as a glass curtain wall. BIPV has the following advantages: 1. Save solar cell support structure, and can replace building materials such as roofs, walls, windows; 2. Save solar cell installation costs; 3. Effectively use the surface area of the building without occupying additional land ; 4. It can shade the sun and reduce the external temperature of the building; 5. Increase the appearance of the building; 6. Combine solar energy with the building so that the building can have its own power supply.

Contents of the invention

Based on this, it is necessary to provide a photovoltaic module with better light transmittance and heat insulation and a preparation method thereof.

The invention discloses a photovoltaic module, comprising:

The panel glass is a plate structure;

The back glass is a plate structure, the back glass is parallel to and opposite to the panel glass, and the back glass is separated from the panel glass by a preset distance;

The support column is clamped between the panel glass and the back panel glass, and the two ends of the support column are fixedly connected with the panel glass and the back panel glass respectively, and are connected with the panel glass and the Backplane glass vertical;

The solar cell is fixed on the side of the back glass facing the panel glass. The solar cell thin-film solar cell is characterized in that it includes a lining core, a thin-film battery layer, and is located between the lining core and the thin-film battery layer. The packaging material in which the thin film battery layer is packaged on the lining core; the thin film battery layer includes a back electrode layer, a power generation layer, a transparent conductive layer and a transparent flexible substrate that are sequentially covered from the inside to the outside; the packaging material is sleeved on the lining Outside the core, the two are non-flat three-dimensional structures with the same shape; the back electrode layer, the power generation layer and the transparent conductive layer are respectively etched with a third insulating groove, a second insulating groove and a first insulating groove;

Wherein, the edges of the panel glass and the back glass are edge-sealed so that an airtight cavity is formed between the panel glass and the back glass, and the airtight cavity is evacuated so that the The airtight cavity is a vacuum cavity.

In one embodiment, the support column is a glass column.

In one embodiment, there are a plurality of solar cells, and the plurality of solar cells are arranged at intervals, and the plurality of solar cells are electrically connected through bus bars.

In one embodiment, a wire hole is opened on the back glass, and the bus bar is led out through the wire hole.

In one of the embodiments, an adhesive layer is further included, and the solar cell is adhered to the back glass through the adhesive layer.

In one embodiment, the distance between the panel glass and the back glass is 0.1 mm to 10 mm.

The above-mentioned photovoltaic module has better light transmittance because both the panel glass and the back glass are transparent. Moreover, a closed cavity is formed between the panel glass and the back glass, and the closed cavity is vacuumized so that the closed cavity is a vacuum cavity. The support column plays a supporting role, which can prevent the airtight cavity of the ground vacuum from breaking due to the air pressure difference after vacuuming. Since the vacuum has the effect of heat insulation, it is difficult for heat to penetrate the photovoltaic module. Therefore, the above-mentioned photovoltaic module has good heat insulation while having good light transmittance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a sectional view of a photovoltaic module in a preferred embodiment of the present invention;

Fig. 2 is the structural representation of solar cell in Fig. 1;

In the figure: protective layer 101, back electrode layer 102, power generation layer 103, transparent conductive layer 104, flexible substrate 105, first insulating groove 201, second insulating groove 202, third insulating groove 203, packaging material 301, lining core 401, a seam 501, and a protective cover 601.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 and FIG. 2 , the photovoltaic module 100 in a preferred embodiment of the present invention includes a panel glass 110 , a back glass 120 , a support post 130 , a solar cell 140 and an adhesive layer 150 .

The panel glass 110 is a plate structure, and the panel glass 110 is generally rectangular. In order to enhance light transmittance, the panel glass 110 adopts ultra-clear float glass or anti-reflection coated glass to increase the light transmittance of the panel glass 110 .

The back glass 120 is a plate structure, and its shape and material are the same as those of the front glass 110 . The back glass 120 is parallel to and opposite to the panel glass 110 , and the back glass 120 is separated from the panel glass 110 by a preset distance.

The support column 130 is sandwiched between the panel glass 110 and the back glass 120 . Two ends of the support column 130 are respectively fixedly connected to the panel glass 110 and the back panel glass 120 , and are perpendicular to the panel glass 110 and the back panel glass 120 . The support column 130 plays a supporting role and can maintain a stable structure formed by the panel glass 110 and the back plate 20 . The support column 130 is a columnar structure and can be made of plastic, rubber, metal, glass and other materials. Specifically, in this embodiment, the support column 130 is a glass column. Glass has relatively high hardness, so the support column 130 has a strong longitudinal compression resistance. Moreover, the glass is transparent, which can prevent the support pillars 130 from blocking sunlight and form dark spots, and further improve the light transmittance of the photovoltaic module 100 .

The solar cell 140 is fixed on a side of the back glass 120 facing the panel glass 110 . Specifically, in this embodiment, the solar cell 140 is bonded to the back glass 120 through the adhesive layer 150 .

The adhesive layer 150 may be formed of ethylene-vinyl acetate copolymer, polyvinyl butyral or silica gel coated on the back glass 120 . The solar cell 140 adopts a cylindrical substrate, and a cylindrical thin-film solar cell is manufactured. The specific structure includes a lining core 401, a thin-film battery layer, and a thin-film battery layer that is located between the lining core 401 and the thin-film battery layer. The packaging material 301 on the lining core 401; the thin film battery layer includes a protective layer 101, a back electrode layer 102, a power generation layer 103, a transparent conductive layer 104 and a transparent flexible substrate 105 which are sequentially covered from the inside to the outside; the packaging material 301 Set on the outside of the lining core 401, the two are cylindrical in shape; the back electrode layer 102, the power generation layer 103 and the transparent conductive layer 104 are respectively etched with a third insulating groove 203, a second insulating groove 202 and a first insulating groove 201. When the photovoltaic module 100 is used as a curtain wall, one side of the panel glass 110 faces outward, and one side of the back glass 120 faces inward. Therefore, sunlight can pass through the panel glass 110 and then irradiate the solar cells 140 .

Wherein, the edges of the panel glass 110 and the back glass 120 are edge-sealed, so that an airtight cavity 160 can be formed between the panel glass 110 and the back glass 120 . Specifically, it is possible to apply structural glue between the edges of the panel glass 110 and the back glass 120, and form a sealing strip after the structural glue is cured, thereby sealing the space between the plate glass 110 and the back glass 120 through the sealing strip. into a closed cavity 160. The solar cell 140 is located in the airtight cavity 160 .

Vacuum the airtight cavity 160, so that the airtight cavity 160 is a vacuum chamber. Therefore, the aging speed of the solar cell 140 located in the airtight cavity 160 can be slowed down, thereby prolonging the service life of the photovoltaic module 100 . In addition, the vacuum has the effect of heat insulation, which can prevent the temperature in the airtight cavity 160 from being too high, thereby improving the power generation efficiency of the solar cell 140 .

The structure of the photovoltaic module 100 is a double-glass vacuum structure, and a sealed cavity 160 is formed between the panel glass 110 and the back glass 120 , and the solar cell 140 is disposed in the sealed cavity 160 . Due to the strong light transmittance of glass, the photovoltaic module 100 has better light transmittance. In addition, since the vacuum layer has better heat insulation effect, it is difficult for heat to penetrate the photovoltaic module 100 . Therefore, the photovoltaic module 100 also has better heat insulation performance.

In this embodiment, the distance between the panel glass 110 and the back glass 120 is 0.1 mm to 10 mm. The height of the airtight cavity 160 is 0.1 mm to 10 mm. Therefore, the volume of the photovoltaic module 100 can be greatly reduced, which is convenient for transportation and installation. It can be understood that, in other embodiments, the height of the airtight cavity 160 can be adjusted according to the thickness of the solar cell 140 and the thickness requirement of the photovoltaic module 100 .

Backplane glass. 120 is provided with a wire hole 121 through which the bus bar 141 is led out. The wire hole 121 has been sealed to prevent gas exchange between the airtight cavity 160 and the outside, thereby maintaining a vacuum state. After the bus bar 141 is drawn out, it can be inserted into the junction box, and then the electric energy converted by the photovoltaic module 100 can be utilized. It can be understood that, in other embodiments, the bus bar 141 can also be led out from the sealing edge of the panel glass 110 and the back glass 120 .

Since the panel glass 110 and the back panel glass 120 of the photovoltaic module 100 are both transparent, the photovoltaic module 100 has better light transmission. Moreover, a sealed cavity 160 is formed between the panel glass 110 and the back glass 120 , and the sealed cavity 160 is subjected to a vacuum process so that the sealed cavity 160 is a vacuum cavity. The support column 130 plays a supporting role, which can prevent the airtight cavity 160 of the ground vacuum from being broken due to the air pressure difference after vacuuming. Since the vacuum has a thermal insulation effect, it is difficult for heat to penetrate the photovoltaic module 100 . Therefore, the photovoltaic module 100 has good heat insulation while having good light transmittance.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (7)

1. a kind of photovoltaic module, it is characterised in that including：

Face glass, is platy structure；

Back-panel glass, is platy structure, and the back-panel glass is parallel with the face glass and sets relatively Put, the back-panel glass and face glass interval pre-determined distance；

Support column, is held between the face glass and the back-panel glass, and the two of the support column End be fixedly connected respectively with the face glass and the back-panel glass, and with the face glass and institute State back-panel glass vertical；

Solar cell, is fixed on the back-panel glass towards the side of the face glass, it is described too Positive energy battery and film solar energy battery, it is characterised in that：Including lining core, thin film cell layer and positioned at lining The encapsulating material in lining core is encapsulated between core and thin film cell layer and by thin film cell layer；The film Battery layers include covering the dorsum electrode layer of setting, electric layer, transparency conducting layer and thoroughly successively from the inside to the outside Bright flexible substrate；The encapsulating material is placed on outside lining core, and the two is the consistent non-tablet of shape Stereochemical structure；It is straggly respectively on the dorsum electrode layer, electric layer and transparency conducting layer that to be etched with the 3rd exhausted Edge groove, the second insulation tank and the first insulation tank；

Wherein, the face glass and the edge edge sealing of the back-panel glass are handled, so that the panel Closed cavity is formed between glass and the back-panel glass, the closed cavity is vacuumized, so that institute Closed cavity is stated for vacuum chamber；

The solar battery sheet is multiple, and multiple solar cells are spaced, the branch Dagger is multiple, and multiple support columns are distributed in around each solar cell.

2. photovoltaic module according to claim 1, it is characterised in that the support column is glass Post.

3. photovoltaic module according to claim 1, it is characterised in that multiple solar-electricities Electrically connected between pond by busbar.

4. photovoltaic module according to claim 3, it is characterised in that opened in the back-panel glass Provided with wire guide, the busbar is drawn by the wire guide.

5. photovoltaic module according to claim 1, it is characterised in that also including cementing layer, institute Solar cell is stated to be adhered in the back-panel glass by the cementing layer.

6. photovoltaic module according to claim 5, it is characterised in that the cementing layer is by coating Formed in the ethylene-vinyl acetate copolymer in the back-panel glass, polyvinyl butyral resin or silica gel.

7. photovoltaic module according to claim 1, it is characterised in that the face glass and institute The distance between back-panel glass is stated for 0.1 millimeter to 10 millimeters.