CN110783420A - Solar cell module, packaging method thereof and heat sealing device - Google Patents

Abstract

The utility model relates to a solar cell module and encapsulation method and sealing device thereof, sealing device includes the conveyer belt that is used for conveying to wait to encapsulate solar cell module (10), is used for heating module (51) of the sealing membrane of waiting to encapsulate solar cell module (10), and is used for following wait to encapsulate solar cell module (10) relative both sides go on last pinch roller (521) and push down the wheel (522) of pressfitting to it, heating module (51), go up pinch roller (521) and push down wheel (522) set gradually along the direction of transfer of waiting to encapsulate solar cell module (10). In the heat sealing device provided by the disclosure, the upper pressing wheel and the lower pressing wheel can gradually press the forward-conveyed solar cell module, bubbles can be completely removed in the pressing process, the solar cell module can be packaged without vacuum, the packaging process is simplified, and the packaging cost is saved.

Description

Solar cell module and its packaging method and heat sealing device

technical field

The present disclosure relates to the field of encapsulation of solar cell assemblies, and in particular, to a solar cell assembly, a method for encapsulating solar cell assemblies, and a heat sealing device for solar cell assemblies.

Background technique

In the solar cell module encapsulation process, glass is used as the front plate and the back plate respectively, and EVA (ethylene-vinyl acetate copolymer) adhesive film material is used to bond the chips to the front plate and the back plate respectively. However, this packaging method makes the thin-film battery lose its flexibility and cannot be bent at will, which limits the application scenarios of thin-film batteries. Therefore, flexible packaging technology emerges as the times require. In the related art, the steps of the flexible packaging process are generally as follows: laying a first adhesive film layer on the backplane flexible substrate, selecting a suitable battery chip and placing it on the first adhesive film layer; The second adhesive film layer, the waterproof film layer, the third adhesive film layer and the outer protective film; finally, the battery is encapsulated by a high temperature vacuum lamination process, and the product is obtained by an autoclave process. In the above flexible packaging process, hot-melt material is used as the adhesive film layer, which plays the role of bonding the battery chip, the waterproof film layer and the outer protective film, but the structure of the whole packaged battery module is too complicated, which greatly increases the flexible solar energy. The packaging cost of battery components; the pressing needs to be carried out under vacuum conditions, which increases the difficulty of the manufacturing process and consumes a lot of energy; in addition, the traditional hot pressing process cannot achieve continuous packaging, and the manufacturing efficiency is low.

SUMMARY OF THE INVENTION

A first object of the present disclosure is to provide a heat sealing device for solar cell modules, which can encapsulate solar cell modules without vacuum conditions, simplifies the packaging process and saves packaging costs.

The second object of the present disclosure is to provide a packaging method for a solar cell assembly, which can solve the problems of complex structure of the cell assembly, high packaging cost, and difficult manufacturing process in the existing flexible packaging methods.

A third object of the present disclosure is to provide a solar cell module that is packaged using the solar cell module packaging method provided by the present disclosure.

In order to achieve the above objects, the present disclosure provides a heat sealing device for solar cell assemblies, comprising a conveyor belt for conveying solar cell assemblies to be packaged, a heating module for heating a sealing film of the solar cell assemblies to be packaged, and Upper and lower pressing wheels for pressing the solar cell assembly to be packaged from opposite sides thereof, the heating module, the upper pressing wheel and the lower pressing wheel along the to-be-packaged solar cell The conveying directions of the components are set sequentially.

Optionally, the heat sealing device further includes a cooling module for cooling the solar cell assembly, the cooling modules are arranged at intervals 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 pressing wheel and the lower pressing wheel at a second preset speed, and the conveyor belt passes at a third preset speed With the cooling module, wherein the first preset speed is equal to the third preset speed and 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 assembly, comprising: placing a cell chip between a first sealing film and a second sealing film to form a solar cell assembly to be packaged, wherein the The first sealing film and the second sealing film are respectively thermosetting sealing films; the to-be-packaged solar cell assembly is placed on a heat-sealing device for sealing operation, wherein the heat-sealing device is according to claims 1-3 Any one of the heat sealing devices for solar cell modules.

Optionally, the first sealing film and the second sealing film are respectively paraffin sealing films.

Optionally, in the step of placing the to-be-packaged solar cell assembly on a heat-sealing device to perform the sealing operation, the temperature of the heating module is set to 90-130°C.

Optionally, before the step of placing the battery chip between the first sealing film and the second sealing film to form the solar cell assembly to be packaged, the packaging method further includes: cutting out the battery chip according to the size of the battery chip. The first sealing film and the second sealing film, wherein the size of the first sealing film and the second sealing film is larger than the size of the battery chip; After the sealing operation is performed on the heat-sealing device, the packaging method further includes: cutting the excess parts on the first sealing film and the second sealing film according to the size of the battery chip.

Optionally, in the step of placing the to-be-packaged solar cell assembly on a heat-sealing device for sealing operation and cutting the first sealing film and the second sealing film according to the size of the battery chip Between the steps of adding the redundant parts, the packaging method further includes: performing a 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 cell module to be packaged further comprises: arranging on the outside of the first sealing film and the second sealing film protective film.

According to a third aspect of the present disclosure, there is also provided a solar cell assembly, which is packaged by the above-mentioned encapsulation method for a solar cell assembly.

Through the above technical solution, the solar cell components to be packaged are placed on the conveyor belt. When the solar cell components to be packaged pass through the heating module, the sealing film is completely softened and viscous when heated; A certain pressure is applied for pressing; finally, the solar cell module of the pressing wheel is cooled and solidified, and the packaging operation of the solar cell module can be completed. In the heat sealing device provided by the present disclosure, the upper pressing wheel and the lower pressing wheel can be opposite to each other. The previously conveyed solar cell modules are gradually pressed together, and the air bubbles can be removed during the pressing process, and the solar cell modules can be packaged without vacuum conditions, which simplifies the packaging process and saves packaging costs.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and together with the following detailed description, are used to explain the present disclosure, but not to limit the present disclosure. In the attached image:

FIG. 1 is a schematic structural diagram of a heat sealing device for a solar cell module provided by an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a heat sealing device for a solar cell module provided by another exemplary embodiment of the present disclosure;

3 is a schematic structural diagram of a solar cell assembly provided by an exemplary embodiment of the present disclosure;

4 is a schematic structural diagram of a solar cell assembly provided by another exemplary embodiment of the present disclosure;

5 is a schematic structural diagram of placing the solar cell assembly provided by the present disclosure on a heat sealing device;

FIG. 6 is a flowchart of a method for packaging a solar cell assembly provided by an exemplary embodiment of the present disclosure;

7 is a flowchart of a method for packaging a solar cell assembly provided by another exemplary embodiment of the present disclosure;

FIG. 8 is a flowchart of a sealing operation in a method for packaging a solar cell module provided by an exemplary embodiment of the present disclosure.

Description of reference numerals

1 First Parafilm 2 Second Parafilm

3 Battery chip 4 Substrate

51 Heating module 521 Upper pressure roller

522 Press Roller 53 Cooling Module

6 Protective film 10 Solar cell modules to be packaged

Detailed ways

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, but not to limit the present disclosure.

In the present disclosure, unless otherwise stated, the use of directional words such as "upper" and "lower" generally refers to the definition based on the drawings of the corresponding drawings, and "front" and "rear" are relative to the In terms of the conveying direction of the encapsulated solar cell modules, for example, the "left" in Figures 1 to 3 is the "front", the "right" in the drawing is the "rear", and the "inside" and "outside" are Refers to the inside and outside of the outline of the corresponding component, furthermore, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and have no order or importance. Additionally, where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

As shown in FIG. 1 , the present disclosure provides a heat-sealing apparatus for solar cell assemblies, the heat-sealing apparatus including a conveyor belt (not shown in the figure) for conveying the solar cell assemblies 10 to be packaged, for heating the to-be-packaged solar cell assemblies 10 The heating module 51 of the sealing film of the solar cell module 10, and the upper pressing wheel 521 and the lower pressing wheel 522 for pressing the solar cell module 10 to be packaged from opposite sides thereof, wherein the heating module 51, the upper pressing wheel 521 and the lower pressing wheel 522 are arranged in sequence along the conveying direction of the solar cell assembly 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 can be integrated and fixed on the same worktable and sequentially along the conveying direction of the solar cell assembly 10 to be packaged The arrangement, wherein the heating module 51 and the cooling module 53 are respectively formed as open mouths that can be passed through by the conveyor belt, so as to respectively heat and cool the solar cell assemblies 10 to be packaged on the conveyor belt. In addition, a frame is also fixed on the worktable, two bearing seats are arranged at intervals along the height direction of the frame, each bearing seat is rotatably connected with a rotating shaft, and the upper pressing wheel 521 and the lower pressing wheel 522 are rotatably connected On the corresponding rotating shaft, a driving member, 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 encapsulated solar cell assembly 10 is pressed by applying pressure. In addition, the axial distance between the upper pressing wheel 521 and the lower pressing wheel 522 can be fine-tuned according to the thickness of the solar cell module 10 to be encapsulated.

Through the above technical solution, the solar cell assembly 10 to be encapsulated is placed on the conveyor belt. When the solar cell assembly 10 to be encapsulated passes through the heating module 51, the sealing film is completely softened and viscous when heated; , the pressing rollers on both sides apply a certain pressure for pressing; finally, the solar cell assembly of the pressing roller is cooled and solidified to complete the packaging operation of the solar cell assembly. In the heat sealing device provided by the present disclosure, the upper pressing roller 521 and The lower pressing wheel 522 can gradually press the forwardly conveyed solar cell modules, and the air bubbles can be driven out during the pressing process, and the solar cell modules can be packaged without vacuum conditions, which simplifies the packaging process And save packaging cost.

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 assembly, and the cooling modules 53 are arranged at intervals downstream of the upper pressing wheel 521 and the lower pressing wheel 522 . The cooling module 53 can be cooled in a variety of ways. For example, the cooling module 53 can blow cold air toward the solar cell assembly from different directions to achieve cooling and solidification, or the cooling module 53 can be cooled in a similar manner to a refrigerator. It can also achieve the purpose of cooling and curing.

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 pressure roller 521 and the lower pressure roller 522 at a second preset speed, and the conveyor belt passes through the cooling module 53 at a third preset speed, The first preset speed is equal to the third preset speed and smaller than the second preset speed. Here, it is assumed that the solar cell assembly 10 to be packaged is in the heating module 51 , the upper and lower pressing wheels 521 and 522 and the cooling module 53 . In the case of the same stroke, the first preset speed and the second preset speed are controlled to be slower, which can prolong the time of the solar cell module in the heating module 51 and the cooling module 53. Taking the paraffin sealing film as an example, it is necessary to ensure that the solar energy The time of the battery module in the heating module 51 is 20-60min to ensure that the sealing film is completely softened by heating and has a good bonding effect. Similarly, the pressed solar battery module can be fully cooled in the cooling module 53. and curing to ensure the final quality of the product.

In the present disclosure, the conveyor belt includes a first conveyor belt placed in the heating module 51 and a second conveyor belt placed in the cooling module 53 , the front end of the first conveyor belt and the rear end of the second conveyor belt extend to the upper pressing roller 521 and the lower pressing wheel, respectively on the outer peripheral surface of the wheel 522 . In this way, the solar cell components 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 bonding, and are transported into the cooling module 53 by the second conveyor belt to ensure the continuity of the packaging process. sex. In addition, by separately controlling the conveying speeds of the first conveyor belt and the second conveyor belt, the heat-sealing device can simultaneously realize the encapsulation operation of a plurality of solar cell modules 10 to be encapsulated, thereby realizing continuous batch operation and improving the encapsulation efficiency. .

Further, as shown in FIG. 1 and FIG. 2 , the axes of the upper pressing wheel 521 and the lower pressing wheel 522 are located in the same vertical plane, and the upper pressing wheel 521 and the lower pressing wheel 522 rotate in the opposite direction synchronously, and the two can interact with each other. face, while applying force to the solar cell module for pressing, to avoid extrusion or pressure deviation, and may even cause the solar cell module to slip off.

According to a second aspect of the present disclosure, as shown in FIG. 3 , there is also provided a solar cell assembly comprising a battery chip 3 and a first sealing film 1 and a second sealing film 2 for encapsulating the battery chip 3 . , the solar cell assembly can be formed by pressing the heat sealing device described above. The solar cell assembly provided by the present disclosure has a simple structure, does not require a separate adhesive film material for bonding, and reduces the consumption of raw materials. The heat sealing device is used for pressing, and the continuous packaging operation can be realized without vacuum conditions, and the packaging efficiency is high.

The battery chip 3 can be directly placed between the first sealing film 1 and the second sealing film 2. In the present disclosure, as shown in FIG. 3, when the battery chip 3 is prepared, it can be directly prepared on the On the substrate 4, in this way, the battery chip 3 with the substrate 4 is placed 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 relatively mature technology, No detailed introduction is given here.

As shown in FIG. 3 , the solar cell assembly provided by the present disclosure includes a first sealing film 1 , a battery chip 3 , a substrate 4 and a second sealing film 2 arranged in sequence from top to bottom. The structure is simple and the packaging effect is good. Further , in another exemplary embodiment of the present disclosure, in order to enhance the wear resistance and corrosion resistance of the solar cell assembly, as shown in FIG. 4 and FIG. 5 , the outer sides of the first sealing film 1 and the second sealing film 2 are also provided There is a protective film 6, in this embodiment, the protective film 6 can be a transparent polymer film, such as PET (polyethylene terephthalate), PVC (polyvinyl chloride), ETFE (ethylene-tetrafluoroethylene) copolymers) etc. As shown in FIG. 4 , the solar cell assembly formed by the first protective film, the first sealing film 1 , the battery chip 3 , the substrate 4 , the second sealing film 2 and the second protective film arranged in order from top to bottom is placed on the above-mentioned The sealing operation is carried out on the heat sealing device, and the package is compact and has good corrosion resistance and wear resistance.

Specifically, in the present disclosure, the first sealing film 1 and the second sealing film 2 are respectively a thermosetting hydrophobic sealing film, such as a paraffin sealing film, which can play the roles of bonding and waterproofing at the same time, and does not need to be separately added to the first sealing film. A waterproof layer is added on the outer sides of 1 and the second sealing film 2, which simplifies the structure of the solar cell module, reduces the consumption of raw materials, and saves the cost of packaging. Paraffin sealing film can be purchased directly from the market, no need to be processed separately, and paraffin sealing film with a thickness of 0.13-0.65mm can be selected, which can not only ensure the bonding with the battery chip 3, but also ensure the waterproof effect and improve the use of the product. life.

In addition, in the present disclosure, the water vapor transmission rate of the first sealing film 1 and the second sealing film 2 at room temperature is lower than 0.1 g/m ² /day, for example, the water vapor transmission rate of the paraffin sealing film at 38° C. The rate is 0.00001g/m ² /day, and it has good water resistance, which can ensure the waterproof effect of the solar cell module and prolong its service life.

According to a third aspect of the present disclosure, as shown in FIG. 6 , a method for encapsulating a solar cell module is also provided, the encapsulation method includes the following steps: Step 12 , placing the cell chip 3 on the first sealing film 1 and the second sealing film 1 . between the sealing films 2 to form the solar cell assembly 10 to be packaged, wherein the first sealing film 1 and the second sealing film 2 are thermosetting sealing films respectively; step 13, the solar cell assembly 10 to be packaged is placed on a heat sealing device for The sealing operation, wherein the heat sealing device is the heat sealing device described above. In addition, it should be noted that 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 wrapping structure, which can realize flexible packaging of the battery chip 3 and can be bent at will. In addition, the working temperature of the solar cell module 10 processed by this encapsulation method needs to be higher than 85°C. It is designed as a thermosetting sealing film, such as thermosetting resin, paraffin sealing film, etc. Since the paraffin sealing film also has other excellent properties, the following will take the paraffin sealing film as an example to introduce the packaging method in detail.

In the encapsulation method of the solar cell module provided by the present disclosure, it is only necessary to encapsulate a layer of thermosetting sealing film on the top surface and the bottom surface of the cell chip 3 . In addition, the packaging method does not need to be carried out under vacuum conditions, which can reduce restrictions on packaging conditions, reduce energy consumption, and save packaging costs.

Further, as shown in FIG. 7 , the encapsulation method of the 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 first sealing film The size of 1 and the second sealing film 2 is larger than the size of the battery chip 3; and

Step 15: Cut the excess parts on the first sealing film 1 and the second sealing film 2 according to the size of the battery chip 3 .

In step 11, since the sealing film may shrink when heated, the size of the first sealing film 1 and the second sealing film 2 should be larger than the size of the battery chip 3. In addition, the excess part can be used for the surrounding of the battery chip 3. Sealing is performed to ensure the sealing effect on the battery chip 3 and avoid the situation of loose sealing.

In step 15 , the packaged solar cell module 10 is finally trimmed to realize standardized production of the product, which can then be sold and used.

Further, as shown in FIG. 7 , the encapsulation method of the solar cell module provided by the present disclosure further includes: step 14 , performing a coating operation on the surfaces of the first sealing film 1 and the second sealing film 2 .

In step 14, before trimming the redundant parts of the first sealing film 1 and the second sealing film 2, by performing a coating operation on the surfaces thereof, for example, the first sealing film 1 and the second sealing film 2 can be penetrated without being affected. Under the premise of light rate, it can be made into a color sealing film or printed with patterns and logos on the sealing film to achieve decorative effects. In addition, the special coating treatment can also enhance the anti-fouling and anti-fouling ability of the solar cell module 10 .

Specifically, as shown in FIG. 8 , in step 13, step 131 is also included, the temperature of the heating module 51 is set to 90-130° C., and the temperature of the heating module 51 can be adjusted according to the first sealing film 1 and the second sealing film 2 For different properties such as shrinkage rate and melting point, relevant settings should be made. For example, for sealing films with higher melting points, the temperature can be appropriately set higher to ensure that the sealing film can be completely softened.

The encapsulation method for a solar cell module provided by the present disclosure adopts the heat-sealing device described above to perform the sealing operation, and the product obtained by the encapsulation method is the solar cell module described above. Therefore, the encapsulation method has the heat-sealing device described above. And all the beneficial effects of the solar cell module will not be repeated here.

The preferred embodiments of the present disclosure have been described above in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above-mentioned embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure. These simple modifications all fall within the protection scope of the present disclosure.

In addition, it should be noted that the various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, the present disclosure provides The combination method will not be specified otherwise.

In addition, the various embodiments of the present disclosure can also be arbitrarily combined, as long as they do not violate the spirit of the present disclosure, they should also be regarded as the contents disclosed in the present disclosure.

Claims (10)

1. The utility model provides a heat-sealing device for solar module, characterized in that, including the conveyer belt that is used for conveying to wait to encapsulate solar module (10), be used for heating treat that the heating module (51) of sealing membrane of encapsulation solar module (10) to and be used for follow treat that encapsulate solar module (10) relative both sides carry out last pinch roller (521) and push down wheel (522) of pressfitting to it, heating module (51), go up pinch roller (521) and push down wheel (522) are followed treat that encapsulation solar module (10)'s direction of delivery sets gradually.

2. The heat-sealing device for solar cell modules according to claim 1, further comprising a cooling module (53) for cooling down the solar cell module, wherein the cooling module (53) is arranged at intervals downstream of the upper pressing wheel (521) and the lower pressing wheel (522).

3. The heat-sealing device for solar cell modules according to claim 2, wherein the conveyor belt passes through the heating module (51) at a first preset speed, the conveyor belt passes through the upper pinch roller (521) and the lower pinch roller (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.

4. A method for encapsulating a solar cell module, comprising:

placing a battery chip (3) between a first sealing film (1) and a second sealing film (2) to form a solar battery assembly (10) to be packaged, wherein the first sealing film (1) and the second sealing film (2) are respectively thermosetting sealing films;

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 for the solar cell module according to any one of claims 1 to 3.

5. Method of encapsulating according to claim 4, characterized in that the first sealing film (1) and the second sealing film (2) are each a parafilm.

6. The encapsulation method according to claim 5, characterized in that in the step of placing the solar cell module (10) to be encapsulated on a heat sealing device for sealing operation, the temperature of the heating module (51) is set to 90-130 ℃.

7. The encapsulation method according to claim 4, wherein, before the step of placing the battery chip (3) between the first sealing film (1) and the second sealing film (2) to form the solar cell module (10) to be encapsulated, the encapsulation method further comprises:

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);

after the step of placing the solar cell module (10) 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 (1) and the second sealing film (2) according to the size of the battery chip (3).

8. The encapsulation method according to claim 7, wherein between the step of placing the solar cell module (10) to be encapsulated on a heat sealing device for sealing operation and the step of cutting off an excess portion of the first sealing film (1) and the second sealing film (2) according to the size of the battery chip (3), the encapsulation method further comprises:

and performing film coating operation on the surfaces of the first sealing film (1) and the second sealing film (2).

9. The encapsulation method according to claim 4, wherein the step of placing the battery chip (3) between the first sealing film (1) and the second sealing film (2) to form the solar cell module (10) to be encapsulated further comprises:

and a protective film (6) is arranged outside the first sealing film (1) and the second sealing film (2).

10. A solar cell module, wherein the solar cell module is encapsulated by the method for encapsulating a solar cell module according to any one of claims 4 to 9.

Images