CN209981247U

CN209981247U - Curved surface shingled photovoltaic module

Info

Publication number: CN209981247U
Application number: CN201920846882.1U
Authority: CN
Inventors: 席军涛; 李纲; 金鹏; 郭晓珍
Original assignee: SERAPHIM SOLAR SYSTEM CO Ltd
Current assignee: SERAPHIM SOLAR SYSTEM CO Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-01-21
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a curved surface shingled tile photovoltaic module, including encapsulation substrate and battery group cluster, the encapsulation substrate is the curved surface form, and the battery group cluster is laid on the encapsulation substrate, and the battery group cluster includes a plurality of battery strings, and every cluster battery string includes polylith battery piece, and polylith battery piece part is range upon range of to link to each other through electrically conductive flexible material. The utility model provides a curved surface shingled tile photovoltaic module, it can use in the curved surface scene, has widened photovoltaic module's range of application greatly, has strengthened the utilization to solar energy. Meanwhile, by applying the curved scene, more cells are laid on a unit plane, the generated energy per unit area is improved, and the method has important significance for the application of the photovoltaic module.

Description

Curved surface shingled photovoltaic module

Technical Field

The utility model relates to a curved surface shingled tile photovoltaic module belongs to solar cell's technical field.

Background

With global climate change and increasingly severe environmental pollution problems, solar energy is rapidly developed as a green renewable energy source, and a photovoltaic module is formed by assembling a large number of battery cells and can be used for building various photovoltaic power generation systems so as to convert light energy into electric energy.

Photovoltaic modules on the market nowadays generally comprise a plurality of battery strings, each battery string is formed by a plurality of battery pieces which are tiled at intervals and connected in series through solder strips, the plurality of battery strings are welded through bus bars to form the photovoltaic module, existing welding materials are all hard materials, and the conventional welding process can only form a planar photovoltaic module, which undoubtedly limits the application range of the photovoltaic module, for example, building curved surfaces, automobile glass and the like cannot adopt the photovoltaic module, so that the development of the curved photovoltaic module is urgently needed to widen the application scene of the photovoltaic module.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims at providing a curved surface shingled tile photovoltaic module has solved among the prior art photovoltaic module and has been the plane usually, has restricted the problem of photovoltaic module application scene.

The utility model discloses a following technical scheme realizes: the utility model provides a curved surface shingled photovoltaic module, includes packaging substrate and battery string, packaging substrate is the curved surface form, the battery string is laid on packaging substrate, the battery string includes a plurality of battery strings, every string the battery string includes polylith battery piece, polylith the range upon range of setting of battery piece part to link to each other through electrically conductive flexible material.

Preferably, two adjacent battery pieces are connected through the conductive adhesive to form a battery string connected in series.

Preferably, the front side and the back side of each cell are provided with a main grid, the main grid on the back side is close to the bottom edge of the cell, the main grid on the front side is close to the top edge of the cell, and in the same cell string, the main grid on the back side of the previous cell is connected with the main grid on the front side of the next cell through conductive adhesive.

Preferably, the conductive adhesive is one or more of epoxy resin conductive adhesive, acrylate resin conductive adhesive and silicone conductive adhesive.

Preferably, the packaging substrate comprises a panel packaging layer and a backboard packaging layer, the battery pack string is arranged between the panel packaging layer and the backboard packaging layer, and the panel packaging layer and the backboard packaging layer are one or more of curved photovoltaic glass, a curved epoxy board and curved automobile glass.

Preferably, the panel packaging layer and between the battery pack strings, the backplate packaging layer and be provided with the encapsulation glued membrane between the battery pack strings to realize fixed connection through the encapsulation glued membrane, the encapsulation glued membrane is one or more in EVA, POE, crowded type glued membrane, silica gel.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a curved surface shingled tile photovoltaic module, it can use in the curved surface scene, has widened photovoltaic module's range of application greatly, has strengthened the utilization to solar energy. Meanwhile, by applying the curved scene, more cells are laid on a unit plane, the generated energy per unit area is improved, and the method has important significance for the application of the photovoltaic module.

Drawings

Fig. 1 is a schematic structural view of a package substrate according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery string according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a curved-surface shingled photovoltaic module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cell interconnection mode according to an embodiment of the present invention.

Reference numerals

10-packaging substrate, 20-battery string, 21-battery piece, 22-conductive adhesive and 23-main grid.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-3, the utility model provides a curved surface shingled photovoltaic module, including packaging substrate 10 and battery group cluster, packaging substrate 10 is the form of curved surface, and the battery group cluster is laid on packaging substrate 10, and the battery group cluster is including many strings of battery cluster 20, and every string of battery cluster 20 includes polylith battery piece 21, and polylith battery piece 21 is a partial range upon range of setting to polylith battery piece 21 links to each other through electrically conductive flexible material.

The battery pieces 21 are stacked to form a battery string and laid on the packaging substrate 10 to form a tiled photovoltaic module. The battery pieces 21 are connected through the conductive flexible material, and based on the connection material and the connection mode, the battery pack string has a flexible bending angle in the laying process, the battery pack string is not easy to break when being laid on the curved surface type packaging base material 10, the formed curved surface photovoltaic module can be applied to a curved surface scene, so that the application range of the photovoltaic module is widened, for example, the photovoltaic module can be applied to automobile glass, buildings and the like, the utilization of solar energy is enhanced, meanwhile, the tile-stacked photovoltaic module is applied to the curved surface, the battery pieces 21 laid in unit area are increased, and the generating capacity in unit area is improved.

Specifically, two adjacent battery pieces 21 are connected through a conductive adhesive 22 to form a battery string 20 connected in series.

The conductive paste 22 may be one or more of an epoxy resin conductive paste 22, an acrylate resin conductive paste 22, and a silicone resin conductive paste 22. The epoxy resin conductive adhesive 22 is generally composed of an epoxy matrix, a diluent, a curing agent, a conductive filler and other additives, the conductivity of the epoxy resin conductive adhesive is realized through the conductive filler, and the epoxy resin conductive adhesive has excellent conductivity on both the bonding transverse plane and the bonding longitudinal plane; the main material of the acrylate resin conductive adhesive 22 is acrylate resin, and conductive filler is added into the acrylate resin so as to enable the acrylate resin to have conductivity; the silicone conductive adhesive 22 generally has a conductive function achieved by adding metal elastic pieces, conductive black particles, conductive material coatings, and the like to the silica gel, and has the flexibility, elasticity, and temperature resistance of the conventional silica gel. Of course, in addition to the above-mentioned types of conductive adhesives 22, the conductive adhesive 22 used in the curved-surface laminated photovoltaic module in the present embodiment may also be other types of flexible conductive materials, so that the battery string 20 can be flexibly bent to be attached to the curved-surface package substrate 10.

Adopt conducting resin 22 to realize connecting between the battery piece 21, abandoned the mode that traditional busbar was connected, not only realized the effect that the curved surface was buckled, reduced the inside loss of photovoltaic module moreover, wholly improved photovoltaic module's output.

It should be further noted that, as shown in fig. 4, the front side and the back side of each cell 21 are provided with a main grid 23, the main grid 23 on the back side of the cell 21 is adjacent to the bottom edge of the cell 21, the main grid 23 on the front side of the cell 21 is adjacent to the top edge of the cell 21, in the same cell string 20, a plurality of cells 21 are partially stacked in a column, and the main grid 23 on the back side of the previous cell 21 is connected with the main grid 23 on the front side of the next cell 21 through a conductive adhesive 22, so that a plurality of cells 21 on the same cell string 20 form a series circuit.

The battery pieces 21 are stacked in a shingled manner to form the battery string 20, and compared with the conventional photovoltaic module, the battery pieces 21 on the unit area of the packaging substrate 10 are arranged closely and in an increased number, and no solder strip is needed, so that the photovoltaic module has the advantages of high output power, low internal loss, small reverse current hot spot effect and the like.

In addition, the package substrate 10 in this embodiment includes a panel package layer and a backplane package layer, the battery string is disposed between the panel package layer and the backplane package layer, and the panel package layer and the backplane package layer may be one or more of a curved photovoltaic glass, a curved epoxy board, and a curved automotive glass.

Generally, the panel packaging layer adopts a glass surface, the backboard packaging layer adopts a sheet material surface, sunlight reaches the battery string through the panel packaging layer, and photoelectric conversion is completed in the battery string; the other kind is double-glass photovoltaic module, and its panel packaging layer and backplate packaging layer are the glass face, and this kind of photovoltaic module has better luminousness, can realize two-sided electricity generation a bit, is often used in the aspect of the building.

In order to realize the encapsulation among the panel encapsulation layer, the back plate encapsulation layer and the battery pack string, encapsulation adhesive films (not shown in the figure) are respectively arranged between the panel encapsulation layer and the battery pack string and between the back plate encapsulation layer and the battery pack string, the panel encapsulation layer, the battery pack string and the back plate encapsulation layer are fixedly connected through melting of the encapsulation adhesive films to form a photovoltaic module, and the encapsulation adhesive films are one or more of EVA (ethylene vinyl acetate), POE (polyolefin elastomer), co-extrusion adhesive films and silica gel.

EVA refers to an ethylene-vinyl acetate copolymer which is solid at normal temperature, and can be changed into a liquid having viscosity by being heated and melted to a certain extent; POE refers to polyolefin elastomers, which are thermoplastic elastomers. In the specific manufacturing process of the photovoltaic module, the panel packaging layer, the first layer of packaging adhesive film, the battery pack string, the second layer of packaging adhesive film and the backboard packaging layer are sequentially overlapped and enter the laminating machine, the first layer of packaging adhesive film and the second layer of packaging adhesive film are heated and melted in the laminating machine, the panel packaging layer is pressurized and then cooled, and the panel packaging layer, the battery pack string and the backboard packaging layer are fixedly connected together after the two layers of packaging adhesive films are cooled to form the photovoltaic module.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a curved surface shingled photovoltaic module, its characterized in that includes packaging substrate (10) and battery group cluster, packaging substrate (10) are the curved surface form, the battery group cluster is laid on packaging substrate (10), the battery group cluster includes a plurality of battery cluster (20), every cluster battery cluster (20) include polylith battery piece (21), polylith battery piece (21) part range upon range of setting to link to each other through electrically conductive flexible material.

2. A curved-surface shingled photovoltaic module according to claim 1, wherein two adjacent cells (21) are connected by a conductive adhesive (22) to form a series-connected cell string (20).

3. A curved-surface shingled photovoltaic module according to claim 1 or 2, wherein each of the cells (21) is provided with a main grid (23) on the front surface and the back surface, the main grid (23) on the back surface is close to the bottom edge of the cell (21), the main grid (23) on the front surface is close to the top edge of the cell (21), and in the same cell string (20), the main grid (23) on the back surface of the previous cell (21) is connected with the main grid (23) on the front surface of the next cell (21) through a conductive adhesive (22).

4. The curved shingled photovoltaic module of claim 2, wherein the conductive adhesive (22) is one or more of an epoxy-based conductive adhesive (22), an acrylate-based conductive adhesive (22), and a silicone-based conductive adhesive (22).

5. The curved shingled photovoltaic module of claim 1, wherein the packaging substrate (10) comprises a panel encapsulant and a backsheet encapsulant, the string of cells being disposed between the panel encapsulant and the backsheet encapsulant, the panel encapsulant and the backsheet encapsulant being one or more of curved photovoltaic glass, curved epoxy, and curved automotive glass.

6. The curved-surface laminated photovoltaic module according to claim 5, wherein an encapsulating adhesive film is arranged between the panel encapsulating layer and the battery string, between the back-plate encapsulating layer and the battery string, and is fixedly connected through the encapsulating adhesive film, and the encapsulating adhesive film is one or more of EVA, POE, co-extrusion adhesive film and silica gel.