CN214477502U - Foldable light flexible photovoltaic laminated assembly - Google Patents
Foldable light flexible photovoltaic laminated assembly Download PDFInfo
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- CN214477502U CN214477502U CN202120894241.0U CN202120894241U CN214477502U CN 214477502 U CN214477502 U CN 214477502U CN 202120894241 U CN202120894241 U CN 202120894241U CN 214477502 U CN214477502 U CN 214477502U
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Abstract
The utility model discloses a foldable light flexible photovoltaic laminated assembly, which is prepared by a laminating process and at least comprises 2 photovoltaic cell string units, wherein adjacent photovoltaic cell string units are electrically connected through a flexible conductive belt to form a single photovoltaic assembly; each photovoltaic cell string unit is provided with a front flexible packaging layer and a back flexible packaging layer respectively; the front flexible packaging layer and/or the back flexible packaging layer comprise thermosetting powder coating composite fiber cloth layers packaged correspondingly to the photovoltaic cell string units, so that a flexible foldable area is formed between every two adjacent photovoltaic cell string units, and the flexible folding effect between the adjacent photovoltaic cell string units is realized; the utility model discloses make folding photovoltaic lamination subassembly product whole demonstrate the flexible effect of light, do benefit to packing, transport and transportation, be particularly useful for in having the photovoltaic installation engineering who bears the weight requirement or have curved surface installation demand.
Description
Technical Field
The utility model belongs to the photovoltaic module field, concretely relates to flexible photovoltaic lamination subassembly of collapsible light.
Background
At present, the photovoltaic power generation technology is more and more popularized, the photovoltaic power generation technology level is rapidly improved, and then the photovoltaic power generation cost is rapidly reduced. The current main way to reduce the cost of photovoltaic power generation is to reduce the cost of electricity consumption by increasing the power of the monolithic photovoltaic modules. Conventional monolithic photovoltaic modules employ glass encapsulation (which may be referred to as glass photovoltaic modules) which, due to their size and weight limitations, cannot be made infinitely large. And the large-sized glass photovoltaic module is very inconvenient to transport, so that the power limit of the single glass photovoltaic module in the prior art is about 400-600W. At present, most photovoltaic module products with higher power need to adopt a mode that a plurality of single-chip photovoltaic modules are connected through mechanical components in a foldable mode, the number of mechanical structure connecting pieces required by the foldable mechanical connection is large, high structural cost is caused, and different single-chip photovoltaic modules still need to adopt a junction box and cables to be electrically connected, so that the wiring cost is high and the line loss is large.
The applicant also found through retrieval that patent with publication number CN206498367U discloses a folding photovoltaic module, which comprises a base fabric, a window cloth and a photovoltaic cell structure, wherein a plurality of windows capable of being opened are arranged in order on the window cloth, the photovoltaic cell structure is arranged between the base fabric and the window cloth and corresponds to the positions of the windows, a flexible circuit board is arranged on the photovoltaic cell structure, serial connection, parallel connection or serial-parallel connection between the photovoltaic cell structures is realized through flexible wires connected with the flexible circuit board, the horizontal flexible circuit board is arranged at one side of the top and one side of the bottom of the photovoltaic cell structure at intervals, the longitudinal flexible circuit board is arranged at the middle section of the bottom or the top of the photovoltaic cell structure, and the bottom or the top of the photovoltaic cell structure is not arranged at the same time as the longitudinal flexible circuit board. This solution, which uses a base fabric, in particular a window fabric provided with windows for the light transmission, as an additional main structure for achieving flexible folding, is, on the one hand, the biggest problem with this solution is: the window cloth has hidden troubles in water resistance and pressure resistance level, water vapor easily enters the assembly from the opening and the cloth to corrode metal parts and batteries, the service life and reliability of the photovoltaic assembly are affected, and the window cloth is not suitable for a 1000V/1500V high-voltage system for a photovoltaic power station; on the other hand, the scheme not only increases the structural cost of the photovoltaic module, but also needs to precisely match a plurality of photovoltaic modules with windows in the window cloth when in implementation, thereby bringing great implementation difficulty to the lamination laying process and being difficult to really carry out scale popularization and application.
To this end, the applicant, based on a number of years of dedicated research in the field of photovoltaic module packaging applications, decided to seek technical solutions to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a flexible photovoltaic lamination subassembly of collapsible light for the flexible effect of light is whole to folding photovoltaic lamination subassembly product demonstrates, does benefit to packing, transport and transportation, is particularly useful for in the photovoltaic installation engineering that has the bearing weight requirement or have curved surface installation demand.
The utility model adopts the technical scheme as follows:
a foldable light flexible photovoltaic laminated assembly is prepared through a laminating process and at least comprises 2 photovoltaic cell string units, wherein adjacent photovoltaic cell string units are electrically connected through a flexible conductive tape to form a single photovoltaic assembly; each photovoltaic cell string unit is provided with a front flexible packaging layer and a back flexible packaging layer respectively; the front flexible packaging layer and/or the back flexible packaging layer comprise thermosetting powder coating composite fiber cloth layers packaged correspondingly to the photovoltaic cell string units, so that flexible foldable areas are formed between the adjacent photovoltaic cell string units, and the flexible folding effect between the adjacent photovoltaic cell string units is realized.
Preferably, a flexible packaging strip for packaging the flexible conductive tape is arranged in a gap between adjacent photovoltaic cell string units, and the flexible packaging strip is compounded with the front flexible packaging layer and/or the back flexible packaging layer into a whole during lamination.
Preferably, the front flexible packaging layer comprises a flexible weather-proof protective layer positioned on the outer side of the front, and a thermosetting powder coating composite fiber cloth layer positioned on the inner side of the front.
Preferably, the flexible packaging layer comprises a flexible back plate layer positioned at the outer side of the back surface and a thermosetting powder coating composite fiber cloth layer positioned at the inner side of the back surface.
Preferably, a flexible thermoplastic film layer is arranged between the thermosetting powder coating composite fiber cloth layer and the photovoltaic cell string unit.
Preferably, the front flexible packaging layer and/or the back flexible packaging layer of a single photovoltaic cell string unit comprises a flexible packaging film layer with an area larger than that of the corresponding photovoltaic cell string unit, and the flexible packaging film layer is simultaneously used as a flexible packaging film layer of the photovoltaic cell string unit adjacent to the flexible packaging film layer.
Preferably, the foldable lightweight flexible photovoltaic laminate assembly weighs no more than 3kg/m2。
Preferably, the flexible conductive belt is a galvanized copper belt or a braided copper belt; the flexible conductive strips are connected with the bus bars of the adjacent photovoltaic cell string units in a welding mode.
Preferably, the rated power of the single photovoltaic cell string unit is in a range of 50-600W.
Preferably, the area of each photovoltaic cell string unit is not more than 2m2。
It should be noted that the power values referred to in the present application are rated power values.
The utility model provides a plurality of photovoltaic cell string units are directly electrically connected through a flexible conductive band to form a single-chip photovoltaic assembly, and simultaneously, the packaging layer of each photovoltaic cell string unit is ensured to comprise a rigid layer unit and the flexible conductive band positioned in the gap between the adjacent photovoltaic cell string units is provided with a flexible packaging structure; in specific implementation, the rigid layer unit can be used as a folding reference interface, and the structure between each two adjacent photovoltaic cell string units is composed of a flexible conductive tape and a flexible packaging structure, so that a specific structure of a flexible foldable area is formed between the adjacent photovoltaic cell string units, and finally, the flexible folding effect between the adjacent photovoltaic cell string units can be realized; this flexible folding effect has thoroughly solved self and can't be from folding problem from the structure root of monolithic subassembly, need not to realize indirect folding effect through setting up a large amount of mechanical structure spare, avoids with high costs, the high shortcoming of line loss, or adopts window cloth laminated structure to carry out the height degree and lay foldingly, has avoided the construction degree of difficulty too high and the difficult problem of unable batch implementation, the utility model discloses a technical scheme simple reliable, with low costs, easy batch implementation has solved high-power size monolithic photovoltaic module's difficult problems such as packing, transport and transportation, has still obviously reduced the line loss, and the creative power upper limit of having broken present traditional monolithic photovoltaic module has promoted the technological implementation process of KW level monolithic photovoltaic module product forcefully, and then can also promote photovoltaic power generation system installation to the technical merit of higher convenient and high-efficient.
The utility model also provides two typical core products of a foldable light flexible photovoltaic laminated assembly and a foldable glass photovoltaic laminated assembly particularly preferably aiming at the packaging characteristics of the photovoltaic assembly;
in the foldable light flexible photovoltaic laminated assembly, the applicant specifically and preferably proposes that a thermosetting powder coating composite fiber cloth layer material which is developed by the applicant in advance is used as a front flexible packaging layer, the thermosetting powder coating composite fiber cloth layer is skillfully used as the packaging layer, and the unique rigidity strength of the thermosetting powder coating composite fiber cloth layer is achieved after lamination and solidification, so that a flexible foldable area is formed between each adjacent photovoltaic cell string units, and the foldable effect is realized; meanwhile, the thermosetting powder coating composite fiber cloth layer can endow the laminated assembly with a proper flexible effect after lamination, so that the foldable photovoltaic laminated assembly product integrally shows a light flexible effect, is beneficial to packaging, carrying and transportation, and is particularly suitable for photovoltaic installation engineering with a load-bearing weight requirement or a curved surface installation requirement.
The foldable glass photovoltaic laminated assembly is characterized in that a front glass layer is mainly adopted as a main body structure of a front packaging layer of each photovoltaic cell string unit, and flexible conductive strips for realizing the electric connection of adjacent photovoltaic cell string units are packaged through a specific flexible packaging structure, so that the foldable glass photovoltaic laminated assembly has good waterproof and insulating pressure-resistant performances, a flexible foldable area is formed between each adjacent photovoltaic cell string units, the foldable effect of the glass photovoltaic laminated assembly is realized, the problem that the conventional glass packaged photovoltaic assembly with a large power size is difficult to package, transport and transport is solved, and the upper power limit of the conventional single-glass photovoltaic assembly (comprising a double-glass assembly) is creatively broken.
Drawings
Fig. 1 is a schematic structural view of a foldable monolithic photovoltaic package assembly according to embodiment 1 of the present invention (unfolded state;
fig. 2 is a schematic structural view of the foldable monolithic photovoltaic package assembly of fig. 1 in a partially flexible folded state;
fig. 3 is a schematic diagram of an electrical connection configuration of the foldable monolithic photovoltaic package assembly of fig. 1;
fig. 4 is a schematic structural view of a foldable monolithic photovoltaic package assembly according to embodiment 2 of the present invention in a partially flexible folded state;
fig. 5 is a schematic cross-sectional structural view of a foldable light flexible photovoltaic laminate module according to embodiment 3 of the present invention;
fig. 6 is a schematic cross-sectional structural view of a foldable light flexible photovoltaic laminate module according to embodiment 4 of the present invention;
fig. 7 is a schematic cross-sectional structure diagram of a single photovoltaic cell string unit in embodiment 5 of the present invention;
fig. 8 is a schematic cross-sectional structural view of a foldable glass photovoltaic laminate assembly according to example 6 of the present invention;
figure 9 is a schematic cross-sectional structural view of a foldable glass photovoltaic laminate assembly according to example 7 of the present invention;
fig. 10 is a schematic cross-sectional structural view of a foldable glass photovoltaic laminate assembly according to example 8 of the present invention.
Detailed Description
The embodiment of the utility model discloses a foldable light flexible photovoltaic laminated assembly, which is prepared by a laminating process and at least comprises 2 photovoltaic cell string units, wherein adjacent photovoltaic cell string units are electrically connected through a flexible conductive belt to form a single photovoltaic assembly; each photovoltaic cell string unit is provided with a front flexible packaging layer and a back flexible packaging layer respectively; the front flexible packaging layer and/or the back flexible packaging layer comprise thermosetting powder coating composite fiber cloth layers packaged correspondingly to the photovoltaic cell string units, so that a flexible foldable area is formed between the adjacent photovoltaic cell string units, and the flexible folding effect between the adjacent photovoltaic cell string units is realized.
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1: referring to fig. 1 and 2, a foldable monolithic photovoltaic module 10 includes 2 photovoltaic cell string units 10a, 10b arranged side by side, and adjacent photovoltaic cell string units 10a, 10b are electrically connected by a flexible conductive tape 11 to form a monolithic photovoltaic module; preferably, in the present embodiment, each photovoltaic cell string unit 10a, 10b employs 4 photovoltaic cell strings 12, please refer to fig. 3 in further combination, in the present embodiment, 1 bypass diode 13 is connected in parallel between every 2 photovoltaic cell strings 12, each photovoltaic cell string 12 includes 10 cell pieces 12a, and the cell pieces 12a employ the size: 166mm monolithic cell structure, single cell power 6.14W; the rated power of each photovoltaic cell string unit 10a, 10b is 245.6W;
in other embodiments, cells of other specifications may also be selected as the cells of each photovoltaic cell string, for example, a whole cell or a slice of various dimensions, a different number of photovoltaic cell strings may also be selected, and photovoltaic cell strings having various series and parallel relations may also be selected as the photovoltaic cell string unit structure in the present application, which is not particularly limited in this embodiment;
in the present embodiment, each photovoltaic cell string unit 10a, 10b is provided with a front side encapsulation layer and a back side encapsulation layer, respectively, and a flexible encapsulation structure for encapsulating a flexible conductive tape is provided in a gap between adjacent photovoltaic cell string units 10a, 10 b; the front side packaging layer and/or the back side packaging layer comprise rigid layer units packaged correspondingly to the photovoltaic cell string units, so that flexible foldable areas 14 are formed between the adjacent photovoltaic cell string units and are used for realizing flexible folding effects between the adjacent photovoltaic cell string units 10a and 10 b; in specific implementation, the rigid layer unit is a thermosetting powder coating composite fiber cloth layer, can also be a glass layer or a cured composite board layer, mainly has a certain rigid effect and is convenient to be used as a folding reference interface; further preferably, in this embodiment, the front side encapsulation layer and/or the back side encapsulation layer of a single photovoltaic cell string unit includes a flexible encapsulation film layer (for example, a front side flexible encapsulation film layer such as a fluorine film or a thermoplastic film on the front side, and/or a back side flexible encapsulation film layer such as a back sheet or a thermoplastic film on the back side) having an area larger than that of the corresponding photovoltaic cell string unit, and the flexible encapsulation film layer simultaneously serves as a flexible encapsulation film layer of the photovoltaic cell string unit adjacent to the flexible encapsulation film layer; this scheme is particularly suitable for being used for when the rigid layer unit for thermosetting powder coating composite fiber cloth layer or solidification composite board layer the encapsulation embodiment, can further do benefit to collapsible monolithic photovoltaic encapsulation subassembly and wholly obtain more excellent encapsulation protective effect for product itself can embody good waterproof and pressure resistance. See examples 3-5 below and examples 6-8 below for further illustration of more specific encapsulation schemes.
Preferably, the flexible packaging structure in this embodiment may adopt a flexible packaging tube or a flexible packaging strip structure or other suitable packaging structures as long as an effective packaging protection effect on the flexible conductive strip 11 can be achieved, which is not particularly limited in this embodiment. The flexible packaging structure can be selected according to the actually adopted rigid layer material.
Of course, in other embodiments, a larger number may also be applicable according to actual needs, for example, several photovoltaic cell string units may be arranged to have multiple rows and/or multiple columns, and the folding direction may be in rows and/or columns, which are all available to those skilled in the art based on the content of the present application in combination with the common knowledge, and the present application is not described in detail.
Preferably, in the present embodiment, the rated power of the single photovoltaic cell string unit 10a, 10b is in the range of 50-600W, and the single photovoltaic package assembly 10 does not occupy too much area after being folded, which is beneficial to packaging, handling and transportation; of course, photovoltaic cell string units in other rated power ranges can be selected according to the design requirements of actual products;
in this embodiment, the flexible conductive tape 11 may be a tinned copper tape, and is connected to the bus bar of the adjacent photovoltaic cell string unit by welding through the tinned copper tape, and considering the bending resistance, it is further preferable that in this embodiment, the flexible conductive tape 11 is a woven copper tape, which can improve the bending resistance of the flexible foldable area 14; preferably, in the present embodiment, the thickness of the flexible foldable area 14 is smaller than the packaging thickness of the photovoltaic cell string units 10a, 10b, which facilitates efficient folding; in order to facilitate the reliability of the electrical connection and the package protection, the application suggests: the gap between the adjacent photovoltaic cell string units 10a and 10b is 1-50mm, and the gap design of other parameter ranges can be selected according to the actual application requirement;
preferably, in the present embodiment, two ends of the foldable monolithic photovoltaic package assembly 10 are respectively used as wire outlets, and the electrical connection output is realized through the junction boxes 15a and 15 b; further preferably, the output junction boxes are 2 male and female junction boxes respectively, diodes are not arranged in the junction boxes 15a and 15b, the electric connection structure is simple, and the device cost is low.
In the embodiment, 2 photovoltaic cell string units 10a and 10b are directly and electrically connected through a flexible conductive tape 11 to form a monolithic photovoltaic module, and meanwhile, the packaging layer of each photovoltaic cell string unit 10a and 10b is ensured to comprise a rigid layer unit and the flexible conductive tape positioned in the gap between the adjacent photovoltaic cell string units 10a and 10b is provided with a flexible packaging structure; in specific implementation, the rigid layer unit can be used as a folding reference interface, and the structure between each adjacent photovoltaic cell string units 10a and 10b is composed of the flexible conductive tape 11 and the flexible packaging structure, so that a specific structure of a flexible foldable area 14 is formed between the adjacent photovoltaic cell string units, and finally, a flexible folding effect between the adjacent photovoltaic cell string units 10a and 10b can be realized; this flexible folding effect has thoroughly solved self unable folding problem from the structure source of monolithic subassembly, need not to realize indirect folding effect through setting up a large amount of mechanical structure spare, avoid with high costs, the high shortcoming of line loss, or adopt window cloth laminated structure to carry out the height degree and lay foldingly, the difficult problem of having avoided the construction degree of difficulty too high and can't implement in batches has been avoided, this embodiment has solved high-power size monolithic photovoltaic module's packing through simple reliable, with low costs, easy technical scheme of implementing in batches, difficult problems such as transport and transportation, still obviously reduced the line loss, the creative power upper limit of traditional monolithic photovoltaic module at present has been broken, the technological implementation process of KW level monolithic photovoltaic module product has been promoted forcefully.
This example 1 proposes a method for preparing the foldable monolithic photovoltaic package assembly 10, which specifically includes: the 2 photovoltaic cell string units 10a and 10b are electrically connected through the flexible conductive strips in advance to obtain a single photovoltaic assembly, a packaging layer is paved before the single photovoltaic assembly is laminated (belonging to the conventional preparation step of the known lamination process), the foldable single photovoltaic assembly can be obtained by performing the conventional lamination process for a single time, and the whole implementation and preparation steps are simple, easy to operate and very suitable for scale popularization and application. In other embodiments, the foldable monolithic photovoltaic package assembly 10 of the present embodiment can also be prepared by performing a continuous composite process (corresponding to a lamination effect) using a suitable continuous composite apparatus, which is not particularly limited in the present embodiment.
This embodiment 1 provides a photovoltaic power generation system, adopts a plurality of as above collapsible monolithic photovoltaic encapsulation subassembly 10 to carry out the electricity through the cable and connect the installation back and obtain, can realize quick installation and build, and then promote the photovoltaic power generation system installation to the technical merit of higher convenient and efficient.
Example 2: the remaining technical solutions of this embodiment are the same as those of embodiment 1, except that in this embodiment 2, referring to fig. 4, the foldable monolithic photovoltaic module 20 includes 6 photovoltaic string units 20a, 20b, 20c, 20d, 20e, and 20f, and a flexible foldable area 21 is formed between each adjacent photovoltaic string unit 20a, 20b, 20c, 20d, 20e, and 20 f.
With regard to the encapsulation and lamination characteristics of photovoltaic modules and with further preferred encapsulation solutions, the present application particularly preferably proposes two typical core products of foldable lightweight flexible photovoltaic laminate modules and foldable glass photovoltaic laminate modules, see in particular the following examples, respectively.
Example 3: on the basis of the technical solution provided in embodiment 1, please refer to fig. 5, this embodiment 3 further provides a foldable lightweight flexible photovoltaic laminate assembly 30, which is prepared by a single lamination process, and includes 2 photovoltaic cell string units 30a, 30b, and adjacent photovoltaic cell string units 30a, 30b are electrically connected by a flexible conductive tape 31 to form a monolithic photovoltaic assembly; each photovoltaic cell string unit 30a, 30b is provided with a front flexible packaging layer and a back flexible packaging layer respectively; the front flexible packaging layer and the back flexible packaging layer respectively comprise thermosetting powder coating composite fiber cloth layers 32 and 33 which are packaged correspondingly to the photovoltaic cell string units 30a and 30b, so that a flexible foldable area 34 is formed between the adjacent photovoltaic cell string units 30a and 30b and is used for realizing the flexible folding effect between the adjacent photovoltaic cell string units 30a and 30 b;
preferably, in order to facilitate the packaging effect of the monolithic photovoltaic module, in the present embodiment, the front flexible packaging layer includes a flexible weather-proof protective layer 35 (specifically, a fluorine film) on the outer side of the front, and a thermosetting powder coating composite fiber cloth layer 32 on the inner side of the front; the back flexible packaging layer comprises a flexible back plate layer 36 (a known flexible back plate can be used) positioned at the outer side of the back surface, and a thermosetting powder coating composite fiber cloth layer 33 positioned at the inner side of the back surface; meanwhile, a flexible packaging strip 37 for packaging a flexible conductive belt is arranged in a gap between the adjacent photovoltaic cell string units 30a and 30b, and the flexible packaging strip 37 is combined with the front flexible packaging layer and the back flexible packaging layer into a whole during lamination, so that the packaging effect is further facilitated; specifically, the material of the flexible package strip 37 may be selected from conventional thermoplastic film materials, such as EVA, POE, PVB, or other suitable adhesive film materials, which is not particularly limited in this embodiment; in other embodiments, the flexible encapsulation strip 37 may be replaced by sleeving a flexible encapsulation sleeve for encapsulating the shielding effect on the flexible conductive strip 31;
preferably, in this embodiment, the weight of the foldable lightweight flexible photovoltaic laminate assembly 30 does not exceed 3kg/m2More preferably, the weight does not exceed 2kg/m2The light-weight flexible effect is excellent; the flexible conductive belt 31 adopts a braided copper belt; the braided copper strips are connected with the bus bars of the adjacent photovoltaic cell string units in a welding mode, so that the flexible foldable area 34 is ensured to have better bending resistance; of course, other conventional conductive strips may be used;
preferably, in the present embodiment, the rated power of the individual photovoltaic string units 30a, 30b ranges from 50 to 600W, and the area of the individual photovoltaic string units 30a, 30b is not more than 2m2On the basis of realizing the high-power light flexible photovoltaic laminated assembly 30, the subsequent packaging and carrying are facilitated.
Example 4: the remaining technical solutions of this embodiment are the same as those in embodiment 3, except that, referring to fig. 6, in the foldable lightweight flexible photovoltaic laminate assembly 40 in this embodiment 4, the fluorine film 45 and the flexible backsheet 46 in the single photovoltaic cell string units 40a, 40b serve as flexible encapsulation film layers, the areas of which are both larger than the areas of the corresponding photovoltaic cell string units, and the fluorine film and the flexible backsheet serve as the fluorine film and the flexible backsheet of the adjacent photovoltaic cell string units, which are beneficial to rapid laying in the lamination process, and further beneficial to the encapsulation protection effect of the flexible conductive tape, so as to ensure that the foldable lightweight flexible photovoltaic laminate assembly 40 can obtain more excellent related performances such as water resistance and pressure resistance relative to the foldable lightweight flexible photovoltaic laminate assembly 30, and this embodiment 4 can be taken as a more preferable embodiment relative to embodiment 3. This example 4 still maintains the flexible package strip 37 of example 3, and since the packaging effect of the flexible conductive strip 41 is already achieved considering that the fluorine film 45 and the flexible back sheet 46 as a continuous layer structure may cover the gap between the adjacent photovoltaic cell string units 40a and 40b, the flexible package strip 37 may not be additionally disposed in the gap in other embodiments, and these changes also belong to the scope of the present application.
Example 5: the remaining technical solutions of this embodiment are the same as those of embodiment 3, except that, referring to fig. 7, in this embodiment 5, a flexible thermoplastic film layer 58 is disposed between the thermosetting powder coating composite fiber cloth layer 52 on the front surface and the thermosetting powder coating composite fiber cloth layer 53 on the back surface and the photovoltaic cell string units 50a and 50b, and specifically, EVA, POE, PVB, or other suitable adhesive film materials may be used. Of course, the preferred flexible encapsulation layer can be applied to the encapsulation scheme of the light flexible photovoltaic laminated assembly in the embodiments 3-5, and more preferred embodiments can be obtained; the fluorine film and the back plate layer may not be additionally provided, and these modified embodiments are all within the scope of the present application.
Similarly, as described in example 4, in this example 5, in other embodiments, the flexible thermoplastic film layer 58 can also be provided in a continuous shape, so that it can simultaneously serve as the flexible thermoplastic film layer of the photovoltaic cell string unit adjacent to the flexible thermoplastic film layer, thereby ensuring that the overall monolithic photovoltaic module can obtain more excellent packaging effect.
In the embodiments 3 to 5, the thermosetting powder coating composite fiber cloth layer is ingeniously utilized as the packaging layer, and the unique rigidity strength of the thermosetting powder coating composite fiber cloth layer after lamination and curing is achieved, so that a flexible foldable area is formed between each two adjacent photovoltaic cell string units, and a foldable effect is achieved; meanwhile, the thermosetting powder coating composite fiber cloth layer can endow the laminated assembly with a proper flexible effect after lamination, so that the foldable photovoltaic laminated assembly product integrally shows a light flexible effect, is beneficial to packaging, carrying and transportation, and is particularly suitable for photovoltaic installation engineering with a load-bearing weight requirement or a curved surface installation requirement.
Example 6: on the basis of the technical solution provided in embodiment 1, please refer to fig. 8, this embodiment 6 further provides a foldable glass photovoltaic laminate assembly 60, which is prepared by a lamination process, and includes 2 photovoltaic cell string units 60a, 60b, wherein adjacent photovoltaic cell string units 60a, 60b are electrically connected by a flexible conductive tape 61 to form a monolithic photovoltaic assembly; each photovoltaic cell string unit 60a and 60b is provided with a front packaging layer and a back packaging layer respectively, and a flexible packaging structure for packaging the flexible conductive belt 61 is arranged in a gap between adjacent photovoltaic cell string units; the front encapsulation layer comprises a front glass layer 62 encapsulated corresponding to each photovoltaic cell string unit 60a, 60b, so that a flexible foldable area 63 is formed between each adjacent photovoltaic cell string unit 60a, 60b, and is used for realizing a flexible folding effect between the adjacent photovoltaic cell string units 60a, 60 b; considering that the laminated assembly product adopting the front glass encapsulation scheme does not generally need to be provided with a fluorine film, the front glass layer 62 is located on the outer surface and cannot be provided in a continuous shape, in order to ensure that a good encapsulation protection effect is obtained for the flexible foldable area 63, preferably, in the present embodiment, the flexible encapsulation structure comprises a thermoplastic encapsulation tube 64 sleeved outside the flexible conductive strip;
preferably, in this embodiment, the back encapsulation layer includes a back glass layer 65 encapsulated corresponding to each photovoltaic cell string unit, and in other embodiments, a back sheet layer may be used, and as with example 4, the back sheet layer may be provided in a continuous shape so as to simultaneously serve as a back sheet layer of a photovoltaic cell string unit adjacent thereto; particularly preferably, in the present embodiment, a front flexible adhesive film layer 66 is provided between the front glass layer 62 and the photovoltaic cell string units 60a, 60b in the present embodiment; a back flexible adhesive film layer 67 is disposed between the back glass layer 65 and the photovoltaic cell string units 60a and 60b, for example, EVA, POE, PVB, or other suitable adhesive film material is used.
Preferably, in the present embodiment, the thickness of the flexible foldable area 63 is smaller than the packaging thickness of the photovoltaic cell string units 60a, 60b, which facilitates efficient folding; particularly preferably, in the present embodiment, the thickness of the flexible folded region 63 ranges from 0.7 to 2mm, and more preferably: 0.7-1.5 mm.
Example 7: the remaining technical solutions of this embodiment are the same as those in embodiment 6, except that, referring to fig. 9, in the foldable glass photovoltaic laminate assembly 70 in this embodiment 7, the flexible packaging structure further includes a flexible packaging strip 72 for packaging the flexible conductive tape 71, and the flexible packaging strip 72 is located at the periphery of the thermoplastic packaging tube 64, which is further beneficial to the packaging protection effect, and ensures that the foldable glass photovoltaic laminate assembly 70 as a whole can have more excellent water resistance and pressure resistance.
Example 8: the remaining technical solutions of this embodiment are the same as those in embodiment 6, except that, referring to fig. 10, in the foldable glass photovoltaic laminate assembly 80 in this embodiment 8, the areas of the front flexible adhesive film layer 86 and the back flexible adhesive film layer 87 are both larger than the areas of the corresponding photovoltaic cell string units 80a and 80b, and the front flexible encapsulation film layer 86 and the back flexible adhesive film layer 87 are simultaneously used as the flexible encapsulation film layers of the adjacent photovoltaic cell string units 80a and 80b, so that the packaging protection effect is further facilitated, and the foldable glass photovoltaic laminate assembly 70 can have more excellent water resistance, pressure resistance and other related performances.
The embodiments 6 to 8 realize the folding effect of the glass photovoltaic laminated assembly, and particularly adopt a flexible packaging structure formed by combining a thermoplastic packaging tube and a flexible packaging strip, so as to realize the waterproof, insulating and pressure-resistant performances of a flexible foldable area in the foldable glass photovoltaic laminated assembly; the problem that the traditional glass-packaged photovoltaic module with large power size is difficult to package, transport and transport is solved, and the upper power limit of the traditional single-glass photovoltaic module (comprising a double-glass module) is creatively broken through.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A foldable light flexible photovoltaic laminated assembly is prepared through a laminating process and is characterized by at least comprising 2 photovoltaic cell string units, wherein adjacent photovoltaic cell string units are electrically connected through flexible conductive tapes to form a single photovoltaic assembly; each photovoltaic cell string unit is provided with a front flexible packaging layer and a back flexible packaging layer respectively; the front flexible packaging layer and/or the back flexible packaging layer comprise thermosetting powder coating composite fiber cloth layers packaged correspondingly to the photovoltaic cell string units, so that flexible foldable areas are formed between the adjacent photovoltaic cell string units, and the flexible folding effect between the adjacent photovoltaic cell string units is realized.
2. The foldable lightweight flexible photovoltaic laminate assembly according to claim 1, wherein a flexible encapsulant strip for encapsulating the flexible conductive tape is provided in the gap between adjacent photovoltaic cell string units, and the flexible encapsulant strip is integrated with the front side flexible encapsulant layer and/or the back side flexible encapsulant layer during lamination.
3. The foldable lightweight flexible photovoltaic laminate assembly according to claim 1, wherein the front flexible encapsulant layer comprises a flexible weather-resistant armor layer on the outside of the front and a thermosetting powder-coated composite fiber cloth layer on the inside of the front.
4. The foldable lightweight flexible photovoltaic laminate assembly according to claim 1, wherein the backside flexible encapsulant layer comprises a flexible backsheet layer on the outside of the backside and a thermosetting powder-coated composite fiber cloth layer on the inside of the backside.
5. The foldable light weight flexible photovoltaic laminate assembly according to claim 3 or 4, wherein a flexible thermoplastic film layer is provided between the thermosetting powder coating composite fiber cloth layer and the photovoltaic cell string unit.
6. The foldable light-weight flexible photovoltaic laminate assembly according to claim 1, wherein the front and/or back flexible encapsulant layers of an individual photovoltaic cell string unit comprise a flexible encapsulant film layer having an area greater than the area of its corresponding photovoltaic cell string unit, which flexible encapsulant film layer serves as the flexible encapsulant film layer of its adjacent photovoltaic cell string unit at the same time.
7. The foldable light weight flexible photovoltaic laminate assembly according to claim 1, wherein the foldable light weight flexible photovoltaic laminate assembly weighs no more than 3kg/m2。
8. The foldable lightweight flexible photovoltaic laminate assembly according to claim 1, wherein the flexible conductive tape is a galvanized or braided copper tape; the flexible conductive strips are connected with the bus bars of the adjacent photovoltaic cell string units in a welding mode.
9. The foldable lightweight flexible photovoltaic laminate assembly according to claim 1, wherein individual photovoltaic cell string units have a power rating in the range of 50-600W.
10. The foldable, lightweight, flexible photovoltaic laminate assembly according to claim 1 or 9, wherein the area of an individual photovoltaic cell string unit is no more than 2m2。
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| CN202120894241.0U CN214477502U (en) | 2021-04-26 | 2021-04-26 | Foldable light flexible photovoltaic laminated assembly |
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| CN214477502U true CN214477502U (en) | 2021-10-22 |
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