Disclosure of Invention
A first object of the present disclosure is to provide a heat sealing device for a solar cell module, which can realize the encapsulation of the solar cell module without vacuum, simplify the encapsulation process and save the encapsulation cost.
A second object of the present disclosure is to provide a method for packaging a solar cell module, which can solve the problems of complicated structure, high packaging cost, difficult manufacturing process, etc. of the solar cell module in the conventional flexible packaging method.
A third object of the present disclosure is to provide a solar cell module encapsulated using the encapsulation method of the solar cell module provided by the present disclosure.
In order to achieve the above purpose, the present disclosure provides a heat sealing device for a solar cell module, including a conveyor belt for conveying the solar cell module to be packaged, a heating module for heating a sealing film of the solar cell module to be packaged, and an upper pressing wheel and a lower pressing wheel for pressing the solar cell module to be packaged from two opposite sides of the solar cell module to be packaged, wherein the heating module, the upper pressing wheel and the lower pressing wheel are sequentially arranged along a conveying direction of the solar cell module to be packaged.
Optionally, the heat sealing device further comprises a cooling module for cooling the solar cell module, and the cooling module is arranged at intervals at the downstream of the upper pressing wheel and the lower pressing wheel.
Optionally, the conveyor belt passes through the heating module at a first preset speed, the conveyor belt passes through the upper pinch roller and the lower pinch roller at a second preset speed, and the conveyor belt passes through the cooling module at a third preset speed, wherein the first preset speed is equal to the third preset speed and is less than the second preset speed.
According to a second aspect of the present disclosure, there is also provided a method for encapsulating a solar cell module, including: placing a battery chip between a first sealing film and a second sealing film to form a solar battery assembly to be packaged, wherein the first sealing film and the second sealing film are respectively thermosetting sealing films; and (3) placing the solar cell module to be packaged on a heat sealing device for sealing operation, wherein the heat sealing device is the heat sealing device for the solar cell module according to any one of claims 1-3.
Optionally, the first sealing film and the second sealing film are paraffin sealing films respectively.
Optionally, in the step of placing the solar cell module to be packaged on a heat sealing device for sealing operation, the temperature of the heating module is set to 90-130 ℃.
Optionally, before the step of placing the battery chip between the first sealing film and the second sealing film to form the solar cell module to be packaged, the packaging method further includes: cutting the first sealing film and the second sealing film according to the size of the battery chip, wherein the size of the first sealing film and the size of the second sealing film are larger than that of the battery chip; after the step of placing the solar cell module to be packaged on a heat sealing device for sealing operation, the packaging method further comprises the following steps: and cutting redundant parts on the first sealing film and the second sealing film according to the size of the battery chip.
Optionally, between the step of placing the solar cell module to be packaged on a heat sealing device for sealing operation and the step of cutting the redundant parts on the first sealing film and the second sealing film according to the size of the cell chip, the packaging method further comprises: and performing film coating operation on the surfaces of the first sealing film and the second sealing film.
Optionally, the step of placing the battery chip between the first sealing film and the second sealing film to form the solar battery module to be packaged further includes: and a protective film is arranged outside the first sealing film and the second sealing film.
According to a third aspect of the present disclosure, there is also provided a solar cell module, which is encapsulated by the above encapsulation method of the solar cell module.
According to the technical scheme, the solar cell module to be packaged is placed on the conveyor belt, and when the solar cell module to be packaged passes through the heating module, the sealing film is heated and completely softened and has viscosity; when the pressing wheels pass through the upper pressing wheel and the lower pressing wheel, the pressing wheels on the two sides apply certain pressure to perform pressing; finally, the solar cell module through the pinch roller is cooled and solidified, and then the packaging operation of the solar cell module can be completed.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise stated, the terms of orientation such as "upper" and "lower" are generally used to define with reference to the drawing plane of the corresponding drawing, and "front" and "rear" are relative to the conveying direction of the solar cell module to be packaged, for example, "left" in the drawing plane of fig. 1 to 3 is "front", and "right" in the drawing plane is "rear", "inside" and "outside" are inner and outer of the outline of the corresponding component, and furthermore, the terms "first" and "second" and the like are used in the present disclosure to distinguish one element from another element, and have no order or importance. In addition, when the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements, unless otherwise indicated.
As shown in fig. 1, the present disclosure provides a heat sealing device for a solar cell module, which includes a conveyor belt (not shown in the figure) for conveying the solar cell module 10 to be packaged, a heating module 51 for heating a sealing film of the solar cell module 10 to be packaged, and an upper pressing wheel 521 and a lower pressing wheel 522 for pressing the solar cell module 10 to be packaged from two opposite sides, wherein the heating module 51, the upper pressing wheel 521 and the lower pressing wheel 522 are sequentially arranged along a conveying direction of the solar cell module 10 to be packaged.
Here, it should be noted that the heating module 51, the upper pressing wheel 521, the lower pressing wheel 522, and the cooling module 53 to be described below may be integrally fixed on the same table and sequentially disposed along the conveying direction of the solar cell module 10 to be packaged, wherein the heating module 51 and the cooling module 53 are respectively formed as an open cavity through which a conveyor belt can pass to respectively heat and cool the solar cell module 10 to be packaged on the conveyor belt. In addition, a rack is fixed on the workbench, two bearing seats are arranged at intervals in the height direction of the rack, a rotating shaft is rotatably connected in each bearing seat, the upper pressing wheel 521 and the lower pressing wheel 522 are rotatably connected to the corresponding rotating shaft, a driving part, such as a motor, can drive the upper pressing wheel 521 and the lower pressing wheel 522 to rotate by driving the rotating shaft to rotate, the rotating directions of the upper pressing wheel 521 and the lower pressing wheel 522 are opposite, pressure can be applied to the forward-conveyed solar cell module 10 to be packaged for pressing, and in addition, the axle center distance of the upper pressing wheel 521 and the lower pressing wheel 522 can be finely adjusted according to the thickness of the solar cell module 10 to be packaged.
Through the technical scheme, the solar cell module 10 to be packaged is placed on a conveyor belt, and when the solar cell module 10 to be packaged passes through the heating module 51, the sealing film is heated and completely softened and has viscosity; when the pressing wheels pass through the upper pressing wheel 521 and the lower pressing wheel 522, the pressing wheels on the two sides apply certain pressure to perform pressing; finally, the solar cell module is cooled and solidified through the pressing wheels, and the packaging operation of the solar cell module can be completed.
As shown in fig. 2, the heat sealing device provided by the present disclosure further includes a cooling module 53 for cooling the solar cell module, and the cooling module 53 is arranged at a position downstream of the upper pressing wheel 521 and the lower pressing wheel 522. The cooling module 53 may be used for cooling in various ways, for example, the cooling module 53 may blow cold air toward the solar cell module from different directions to achieve the cooling and solidifying effects, or the cooling module 53 may be used for cooling in a manner similar to a refrigerator, and the cooling module 53 may be used for cooling and solidifying by setting the temperature of the cooling module 53 in a related manner.
Specifically, in the present disclosure, the conveyor belt passes through the heating module 51 at a first preset speed, the conveyor belt passes through the upper pressing wheel 521 and the lower pressing wheel 522 at a second preset speed, and the conveyor belt passes through the cooling module 53 at a third preset speed, wherein the first preset speed is equal to the third preset speed and is less than the second preset speed, and here, assuming that the solar cell module 10 to be packaged has the same stroke in the heating module 51, the upper pressing wheel 521, the lower pressing wheel 522 and the cooling module 53, the first preset speed and the second preset speed are controlled to be slower, the time of the solar cell module in the heating module 51 and the cooling module 53 can be prolonged, taking paraffin sealing film as an example, the time of the solar cell module in the heating module 51 is required to be 20-60min, the sealing film can be ensured to be heated and completely softened, and have good bonding effect, and likewise, the pressed solar cell module can be fully cooled and solidified in the cooling module 53, so that the final quality of the product is ensured.
In the present disclosure, the conveyor belts include a first conveyor belt disposed in the heating module 51 and a second conveyor belt disposed in the cooling module 53, and a front end of the first conveyor belt and a rear end of the second conveyor belt extend onto outer circumferential surfaces of the upper pinch roller 521 and the lower pinch roller 522, respectively. Therefore, the solar cell module output from the heating module 51 can smoothly enter the gap between the upper pressing wheel 521 and the lower pressing wheel 522 for pressing, and is conveyed to the cooling module 53 by the second conveying belt, so that the continuity of the packaging process is ensured. In addition, by respectively controlling the conveying speeds of the first conveyor belt and the second conveyor belt, the packaging operation of a plurality of solar cell modules 10 to be packaged can be simultaneously realized on the heat sealing device, so that the continuous batch operation is realized, and the packaging efficiency is improved.
Further, as shown in fig. 1 and 2, the axes of the upper pressing wheel 521 and the lower pressing wheel 522 are located in the same vertical plane, the upper pressing wheel 521 and the lower pressing wheel 522 rotate in opposite directions and can interact with each other to apply an acting force to the solar cell module to perform pressing, so as to avoid extrusion or pressure deviation, and even possibly cause the solar cell module to slip.
According to the second aspect of the present disclosure, as shown in fig. 3, a solar cell module is further provided, the solar cell module includes a cell chip 3 and a first sealing film 1 and a second sealing film 2 for encapsulating the cell chip 3, the solar cell module can be formed by laminating through the heat sealing device described above, the solar cell module provided by the present disclosure has a simple structure, does not need to separately set an adhesive film material for bonding, reduces raw material consumption, and simultaneously adopts the above heat sealing device for laminating, so that continuous encapsulation operation can be realized without vacuum condition, and encapsulation efficiency is high.
The battery chip 3 may be directly disposed between the first sealing film 1 and the second sealing film 2, and in the present disclosure, as shown in fig. 3, the battery chip 3 may be directly fabricated on the substrate 4 by using a chemical deposition method when fabricating the battery chip 3, such that the battery chip 3 with the substrate 4 is disposed between the first sealing film 1 and the second sealing film 2 to form a solar cell module, and the chemical deposition method is a well-established technique and will not be described in detail herein.
As shown in fig. 3, the solar cell module provided by the present disclosure includes a first sealing film 1, a cell chip 3, a substrate 4 and a second sealing film 2 arranged in sequence from top to bottom, and has a simple structure and a good encapsulation effect, further, in another exemplary embodiment of the present disclosure, in order to enhance the wear resistance and corrosion resistance of the solar cell module, as shown in fig. 4 and 5, a protective film 6 is further disposed outside the first sealing film 1 and the second sealing film 2, and in this embodiment, the protective film 6 may be a transparent polymer film, such as PET (polyethylene terephthalate), PVC (polyvinyl chloride), ETFE (ethylene-tetrafluoroethylene copolymer), and the like. As shown in fig. 4, the solar cell module formed by the first protective film, the first sealing film 1, the cell chip 3, the substrate 4, the second sealing film 2 and the second protective film arranged in sequence from top to bottom is placed on the heat sealing device for sealing, and the solar cell module is tightly packaged and has good corrosion resistance and wear resistance.
Specifically, in this disclosure, the first sealing film 1 and the second sealing film 2 are thermosetting hydrophobic sealing films, such as paraffin sealing films, and can simultaneously perform the functions of bonding and waterproofing, and it is not necessary to separately add waterproof layers on the outer sides of the first sealing film 1 and the second sealing film 2, so that the structure of the solar cell module is simplified, the consumption of raw materials is reduced, and the packaging cost is saved. The paraffin sealing film can be directly purchased from the market, independent processing is not needed, and the paraffin sealing film with the thickness of 0.13-0.65mm can be selected, so that the adhesion with the battery chip 3 can be ensured, the waterproof effect can be ensured, and the service life of the product is prolonged.
In the present disclosure, the first sealing film 1 and the second sealing film 2 have a water vapor permeability of less than 0.1g/m at room temperature
2A water vapor transmission rate of 0.00001g/m per day, for example, at 38 deg.C for a paraffin sealing film
2The solar cell module has good water resistance, can ensure the waterproof effect of the solar cell module and prolong the service life of the solar cell module.
According to a third aspect of the present disclosure, as shown in fig. 6, there is also provided an encapsulating method of a solar cell module, the encapsulating method including the steps of: step 12, placing the battery chip 3 between the first sealing film 1 and the second sealing film 2 to form a solar battery module 10 to be packaged, wherein the first sealing film 1 and the second sealing film 2 are thermosetting sealing films respectively; and step 13, placing the solar cell module 10 to be packaged on a heat sealing device for sealing operation, wherein the heat sealing device is the heat sealing device described above. In addition, the thermosetting sealing film is heated and softened when heated in the heat sealing device, and is bonded to the battery chip 3 to form a sealing and covering structure, so that the battery chip 3 can be flexibly packaged and can be bent at will. In addition, the operating temperature of the solar cell module 10 processed by the encapsulation method needs to be higher than 85 ℃, and in order to ensure that the first sealing film 1 and the second sealing film 2 do not soften again in the environment higher than the operating temperature, the encapsulation method is designed to be a thermosetting sealing film, such as thermosetting resin, paraffin sealing film, and the like, and the paraffin sealing film has other excellent performances, and the encapsulation method will be described in detail by taking the paraffin sealing film as an example.
In the packaging method of the solar cell module provided by the disclosure, only one layer of thermosetting sealing film is required to be packaged on the top surface and the bottom surface of the cell chip 3 respectively, the packaged solar cell module is simple in structure, the packaging effect on the cell chip 3 can be ensured, the raw material consumption is reduced, the process of the packaging process is simplified, the packaging efficiency is improved, in addition, the packaging method is not required to be carried out under a vacuum condition, the limitation on the packaging condition can be reduced, the energy consumption is reduced, and the packaging cost is saved.
Further, as shown in fig. 7, the method for encapsulating a solar cell module provided by the present disclosure further includes: step 11, cutting the first sealing film 1 and the second sealing film 2 according to the size of the battery chip 3, wherein the size of the first sealing film 1 and the size of the second sealing film 2 are larger than that of the battery chip 3; and
and step 15, cutting the redundant parts of the first sealing film 1 and the second sealing film 2 according to the size of the battery chip 3.
In step 11, the sealing film may shrink when heated, so that the sizes of the first sealing film 1 and the second sealing film 2 need to be larger than the size of the battery chip 3, and in addition, the redundant parts can seal the periphery of the battery chip 3, thereby ensuring the sealing effect on the battery chip 3 and avoiding the situation of untight sealing.
In step 15, the packaged solar cell module 10 is trimmed to realize standardized production of the product, so that the product can be sold and used.
Further, as shown in fig. 7, the method for encapsulating a solar cell module provided by the present disclosure further includes: and step 14, performing film coating operation on the surfaces of the first sealing film 1 and the second sealing film 2.
In step 14, before trimming the redundant portions of the first sealing film 1 and the second sealing film 2, a film plating operation is performed on the surfaces thereof, for example, the first sealing film 1 and the second sealing film 2 may be made into a color sealing film or printed with patterns, logos, etc. on the sealing film without affecting the light transmittance of the first sealing film 1 and the second sealing film 2, so as to achieve a decorative effect, and in addition, the stain resistance and the stain resistance of the solar cell module 10 may be enhanced through a special film plating treatment.
Specifically, as shown in fig. 8, step 13 further includes step 131, in which the temperature of the heating module 51 is set to 90-130 ℃, and the temperature of the heating module 51 may be set according to the difference of the shrinkage rate, the melting point, and other properties of the first sealing film 1 and the second sealing film 2, for example, the temperature of the sealing film with a higher melting point may be set to be higher as appropriate, so as to ensure that the sealing film can be completely softened.
In the packaging method of the solar cell module provided by the present disclosure, the heat sealing device described above is used for sealing, and the product obtained by the packaging method is the solar cell module described above, so that the packaging method has all the beneficial effects of the heat sealing device and the solar cell module, and redundant description is not repeated here.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.