CN217387177U

CN217387177U - Light photovoltaic module

Info

Publication number: CN217387177U
Application number: CN202220866030.0U
Authority: CN
Inventors: 朱加明; 刘亚锋; 黄晓; 王建
Original assignee: Risen Energy Co Ltd
Current assignee: Risen Energy Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-09-06
Anticipated expiration: 2032-04-14

Abstract

The utility model discloses a light photovoltaic module includes transparent preceding rete, front encapsulation rete, battery board layer, back encapsulated layer and backsheet layer, and the front encapsulation rete is attached between rete and battery board layer before transparent, and the back encapsulated layer is attached between backsheet layer and battery board layer, and the rete is equipped with the preceding membrane pressfitting formation of two kinds of different materials at least before transparent. Therefore, at least two layers of transparent front films are pressed to form the transparent front film layer, the transparent front film layer can be arranged on the outer surface of the photovoltaic module instead of photovoltaic glass, the weight of the photovoltaic module is effectively and greatly reduced to meet the requirement of light weight, and the impact resistance and the strength of the photovoltaic module are enhanced.

Description

Light photovoltaic module

Technical Field

The utility model belongs to the technical field of the photovoltaic module technique and specifically relates to a light photovoltaic module.

Background

The solar cell is also called as a 'photocell' or a 'solar chip', is a semiconductor slice which converts light energy into electric energy, is fragile, and can be packaged into a solar panel through other materials for use. In the traditional module structure, the photovoltaic glass is covered on one side or two sides of a solar cell, and the photovoltaic glass cannot be directly attached to the cell because the cell is very fragile, so that an EVA film is generally required to play a role in bonding in the middle.

Due to the existence of the photovoltaic glass, the total weight of the photovoltaic assembly is higher, the glass accounts for as high as 70% -80% of the total weight of the assembly, and when the single-glass or double-glass photovoltaic assembly is used for part of special roofs such as color steel tiles, the load-bearing limit of the roofs can be approached, and potential safety hazards exist. In order to meet the requirement of building integrated photovoltaic, the self weight of the photovoltaic module needs to be reduced urgently to achieve the safety of the whole roof module system, the power generation benefit of a user is guaranteed, and if the weight is too heavy, the popularization and the use of the photovoltaic module are limited.

In addition, the conventional battery module has several problems: the front side of the battery is shielded by grid lines, and the battery efficiency also has a space for improving; secondly, the battery piece and the welding strip are welded at high temperature, welding stress exists, and hidden crack fragments are easy to cause; and thirdly, the battery piece and the welding strip are welded to be in rigid connection, and the impact resistance is poor.

Disclosure of Invention

An object of the utility model is to provide a light photovoltaic module, it replaces photovoltaic glass through the transparent preceding rete of multilayer, and the requirement of weight in order to realize the weight of effective great reduction photovoltaic module to strengthen photovoltaic module's shock resistance and intensity.

Another object of the utility model is to provide a light photovoltaic module, it bonds the solder strip through the conducting resin solidification and realizes the circuit connection between battery piece and the electrode, does not need the high temperature welding process, avoids producing high temperature welding stress, reduces the latent broken piece phenomenon of battery.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a light photovoltaic module includes rete, front encapsulation rete, battery board layer, back encapsulated layer and backplate layer before transparent, the front encapsulation rete is attached in before transparent rete with between the battery board layer, the back encapsulated layer attach in the backplate layer with between the battery board layer, the rete pressfitting forms before transparent being equipped with two kinds of different materials at least.

Preferably, the transparent front film layer includes at least two of PMMA, PTFE, ECTFE, ETEE, PVDF, and PET.

Preferably, the thickness of the transparent front film layer is 40 to 600 μm.

Preferably, the back side packaging layer comprises a first packaging adhesive film layer, a second packaging adhesive film layer and an insulating film layer arranged between the first packaging adhesive film layer and the second packaging adhesive film layer.

Preferably, the insulating film layer is a glass fiber reinforced resin film with a thickness of 400-500 um.

Preferably, the first packaging adhesive film layer or the second packaging adhesive film layer is high-cut-off EVA or POE, and the thickness is 400-600 um.

Preferably, the battery plate layer is selected from one of an IBC battery, a PERC battery, a TOPCon battery, a BSF battery, and a HIT battery.

Preferably, the battery plate layer comprises a plurality of IBC battery strings packaged in series, each IBC battery string is connected with each other through a welding strip, the welding strip is connected with a positive electrode and a negative electrode of the IBC battery string, the welding strip is connected with the positive electrode and the negative electrode through a conductive adhesive, and the positive electrode and the negative electrode are alternately arranged in parallel.

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

Drawings

Fig. 1 is a schematic structural view of a lightweight photovoltaic module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a lightweight photovoltaic module according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery layer according to the present invention.

In the figure: 10. a transparent front film layer; 11. a first front film layer; 12. a second front film layer; 20. the front side is packaged with an adhesive film layer; 30. a battery plate layer; 31. welding a strip; 32. a conductive adhesive; 33. a positive electrode; 34. a negative electrode; 40. a back side packaging layer; 41. a first encapsulation adhesive film layer; 42. an insulating film layer; 43. a second encapsulation adhesive film layer; 50. a back sheet layer.

Detailed Description

The present invention will be further described with reference to the following detailed description, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that as used in this application, the terms "substantially," "about," and the like are used as words of table approximation and not as words of table degree, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

According to the utility model discloses a first aspect, as shown in fig. 1, what provide is a light photovoltaic module, light photovoltaic module includes transparent preceding rete 10, front encapsulation rete 20, battery sheet layer 30, back encapsulated layer 40 and backsheet layer 50, transparent preceding rete 10 set up in light photovoltaic module's surface, front encapsulation rete 20 attached in transparent preceding rete 10 with between the battery sheet layer 30, back encapsulated layer 40 attached in backsheet layer 50 with between the battery sheet layer 30, transparent preceding rete 10 is equipped with the preceding membrane pressfitting formation of two kinds of different materials at least, and each layer preceding membrane is transparent organic rete, and the density of each layer preceding membrane is less than inorganic glass. Therefore, the transparent front film layer 10 is formed by laminating at least two transparent front films made of different materials, so that the toughness of the transparent front film layer 10 is enhanced, the front film with one layer of structure is prevented from being too soft, the front film is beneficial to replacing photovoltaic glass and being arranged on the outer surface of a photovoltaic assembly, the weight of the photovoltaic assembly is effectively and greatly reduced to meet the requirement of light weight, and the impact resistance and the strength of the photovoltaic assembly are enhanced.

In some embodiments, the transparent front film layer 10 includes at least two of PMMA (polymethylmethacrylate), PTFE (polytetrafluoroethylene), ECTFE (ethylene chlorotrifluoroethylene copolymer), ETEE (ethylene tetrafluoroethylene copolymer), PVDF (polyvinylidene fluoride), and PET (polyethylene terephthalate).

The photovoltaic module is characterized by good light transmission, good chemical stability, good weather resistance and high mechanical strength, and has high tensile strength and elastic modulus, and the density of the photovoltaic module is lower than that of inorganic glass, so that the photovoltaic module is convenient to replace the inorganic glass to realize light weight. It should be noted that the transparent front film layer 10 may be made of materials including but not limited to PMMA, PTFE, ECTFE, ETEE, PVDF, and PET, and other materials with low density and capable of replacing inorganic glass may be used for the transparent front film layer 10.

In some embodiments, the transparent front film layer 10 includes a first front film layer 11 and a second front film layer 12, the first front film layer 11 and the second front film layer 12 are laminated to form the transparent front film layer 10 by bonding, the first front film layer 11 is located on an outer surface of the second front film layer 12, and the first front film layer 11 and the second front film layer 12 are made of different materials. Therefore, the light transmittance and the weather resistance of the transparent front film layer 10 are comprehensively considered, and a two-layer front film structure can be selected, so that the toughness of the transparent front film layer 10 is improved, and the influence of excessive film layers on the light transmittance is avoided.

In some embodiments, the thickness of the transparent front film layer 10 is about 40 μm to about 600 μm, and the thickness of the front film may be the same or different for each layer. Specifically, the thickness of the transparent front film layer 10 may be 40 μm, 80 μm, 120 μm, 160 μm, 200 μm, 240 μm, 280 μm, 320 μm, 360 μm, 400 μm, 440 μm, 480 μm, 520 μm, 560 μm, 600 μm.

Preferably, the thickness of the transparent front film layer 10 is about 50 μm to 300 μm, and specifically, the thickness of the transparent front film layer 10 may be 50 μm, 80 μm, 110 μm, 140 μm, 170 μm, 200 μm, 230 μm, 260 μm, 290 μm, 300 μm.

In some embodiments, the front side encapsulation adhesive film layer 20 is selected from one of a uv-high permeability EVA adhesive film, a POE adhesive film, a PVB adhesive film, a liquid silicone adhesive film, or a co-extruded EVA/POE adhesive film. Wherein, co-extrusion type EVA/POE glued membrane is the compound glued membrane that is formed by EVA and POE, and if the inlayer of laminating in the battery piece is the EVA layer, the skin that deviates from the battery piece is the POE layer, effectively avoids EVA glued membrane and external steam contact, reduces the PID phenomenon of subassembly.

In some embodiments, the battery plate layer 30 is selected from one of an IBC battery, a PERC battery, a TOPCon battery, a BSF battery, a HIT battery.

In some embodiments, the battery plate layer 30 is an IBC battery, which includes a plurality of IBC battery strings packaged in series, each IBC battery string is connected by a solder strip 31, the solder strip 31 connects a positive electrode 33 and a negative electrode 34 of the IBC battery string, the solder strip 31 connects the positive electrode 33 and the negative electrode 34 by a conductive adhesive 32, and the positive electrode 33 and the negative electrode 34 are alternately arranged in parallel, as shown in fig. 3, so that the solder strip 31 is cured and bonded by the conductive adhesive 32 to realize circuit connection between a battery piece and an electrode, a high-temperature welding process is not required, high-temperature welding stress is avoided, and a battery subfissure and fragment phenomenon is reduced.

In some embodiments, the solder strip 31 is cured and bonded to the positive electrode 33 and the negative electrode 34, the curing temperature is 110 ℃ to 150 ℃, the curing time is 10 s to 30s, the conductive adhesive 32 is one or more of acrylic acid, organic silicon or epoxy resin, and the filler is silver powder or silver-coated copper. The conductive adhesive 32 is dispensed or printed to the corresponding electrode, and the shape of the conductive adhesive may be circular or square.

In some embodiments, the solder strip 31 and the conductive adhesive 32 may also be replaced by a conductive pressure sensitive adhesive tape, the conductive pressure sensitive adhesive tape has a multiple structure, the conductive pressure sensitive adhesive tape is provided with a PET adhesive layer and a conductive adhesive layer, the PET adhesive layer is an ultra-thin structure, so that the positive electrode 33 or the negative electrode 34 can be bonded, the conductive adhesive layer is an acrylic acid or organic silicon system resin adhesive layer containing silver filler, the pressure sensitive adhesive tape does not have a conductive function under normal conditions, the positive electrode and the negative electrode are bonded to the corresponding battery, circuit connection and conduction can be achieved under a lamination pressure of 120 ℃ to 150 ℃, a high-temperature welding process is not performed in a component finished product process, and a hidden cracking risk of the battery is correspondingly reduced.

In some embodiments, the backsheet layer 50 is a PET composite backsheet or a fluorine-containing film backsheet, such as a PVDF film backsheet. Wherein the back plate layer 50 has a thickness of about 350 μm to 550 μm, and specifically, the back plate layer 50 may have a thickness of 350 μm, 370 μm, 390 μm, 410 μm, 430 μm, 450 μm, 470 μm, 490 μm, 510 μm, 530 μm, 550 μm. Therefore, the composite backboard replaces the conductive backboard, so that the assembly cost is reduced, and the process is simplified.

In some embodiments, the backside packaging layer 40 includes a first packaging adhesive film layer 41, a second packaging adhesive film layer 43, and an insulating film layer 42 attached between the first packaging adhesive film layer 41 and the second packaging adhesive film layer 43, the first packaging adhesive film layer 41 is attached to the opposite side of the battery plate layer 30, the second packaging adhesive film layer 43 is disposed between the insulating film layer 42 and the backside plate layer 50, the insulating film layer 42 is a glass fiber reinforced resin film, such as a PVC resin film, a PVE resin film, or a PET resin film, the insulating film layer 42 can maintain good electrical insulation performance in high temperature and humidity environment, and increase the packaging strength of the back side of the battery plate layer 30, as shown in fig. 2.

In some embodiments, the thickness of the insulating film layer 42 is about 400 μm to 500 μm, and specifically, the thickness of the insulating film layer 42 may be 410 μm, 420 μm, 430 μm, 440 μm, 450 μm, 460 μm, 470 μm, 480 μm, 490 μm, or 500 μm.

In some embodiments, the first or second

encapsulant film layer

41 or 43 is selected from a high-cut-off EVA film, a POE film, or a co-extruded EVA/POE film, so as to intercept the uv rays on the back surface of the battery plate layer 30, so as to prevent the uv rays from causing aging damage to the back plate layer 50.

In some embodiments, the first encapsulant film layer 41 may also be selected from one of an ultraviolet high-permeability EVA adhesive film, a POE adhesive film, a PVB adhesive film, a liquid silicone adhesive film, and a co-extruded EVA/POE adhesive film.

In some embodiments, the thicknesses of the front side encapsulation adhesive film layer 20 and the first encapsulation adhesive film layer 41 are about 400 μm to 600 μm, and in particular, the thicknesses of the front side encapsulation adhesive film layer 20 and the first encapsulation adhesive film layer 41 may be 400 μm, 420 μm, 440 μm, 460 μm, 480 μm, 500 μm, 520 μm, 540 μm, 560 μm, 580 μm, 600 μm.

In some embodiments, the thickness of the second encapsulant film layer 43 is about 400 μm to 600 μm, and specifically, the thickness of the second encapsulant film layer 43 may be 400 μm, 420 μm, 440 μm, 460 μm, 480 μm, 500 μm, 520 μm, 540 μm, 560 μm, 580 μm, 600 μm.

The light photovoltaic module is formed by laminating a plurality of layers of composite transparent front film layers 10, front packaging adhesive film layers 20, battery plate layers 30, first packaging adhesive film layers 41, insulating film layers 42, second packaging adhesive film layers 43 and back plate layers 50 from top to bottom into an integral structure, the production process, the laminating parameters and the conventional modules of the light photovoltaic module are basically not different, independent debugging is not needed, and rapid production can be realized.

The basic principles, main features and advantages of the present invention have been described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a light photovoltaic module, its characterized in that, includes transparent preceding rete, front encapsulation rete, battery board layer, back encapsulated layer and backsheet layer, front encapsulation rete is attached in transparent preceding rete with between the battery board layer, back encapsulated layer attach in backsheet layer with between the battery board layer, the rete pressfitting forms before transparent being equipped with two kinds of different materials at least.

2. The lightweight photovoltaic module of claim 1, wherein the transparent front film layer comprises at least two of PMMA, PTFE, ECTFE, ETEE, PVDF, and PET.

3. The lightweight photovoltaic module of claim 2, wherein the transparent front film layer has a thickness of 40-600 μm.

4. The lightweight photovoltaic module of claim 1, wherein the backside encapsulant layer comprises a first encapsulant layer, a second encapsulant layer, and an insulating layer disposed between the first and second encapsulant layers.

5. The lightweight photovoltaic module of claim 4, wherein the insulating film layer is a glass fiber reinforced resin film having a thickness of 400 μm to 500 μm.

6. The lightweight photovoltaic module of claim 4, wherein the first or second encapsulant layer is a high cut-off EVA or POE with a thickness of 400-600 μm.

7. The lightweight photovoltaic module of claim 1, wherein the cell panel layer is selected from one of an IBC cell, PERC cell, TOPCon cell, BSF cell, HIT cell.

8. The lightweight photovoltaic module of claim 1 or 7, wherein the cell panel layer comprises a plurality of series-packaged IBC cell strings, each IBC cell string is connected with another IBC cell string through a solder strip, the solder strip is connected with a positive electrode and a negative electrode of the IBC cell string, the solder strip is connected with the positive electrode and the negative electrode through a conductive adhesive, and the positive electrode and the negative electrode are alternately arranged in parallel.

9. The lightweight photovoltaic module of claim 8, wherein the conductive adhesive is hybrid with one or more of acrylic, silicone, or epoxy.