CN110534603A - A kind of photovoltaic module and preparation method thereof - Google Patents

Abstract

The invention discloses a method for preparing a photovoltaic module, which relates to the technical field of photovoltaic power generation. The preparation method includes: laying each component of the photovoltaic module; laminating each component that has been laid; wherein, the lamination process is divided into There are multiple stages, and the pressure values of the multiple stages are different. In the process of lamination, the present invention adopts different pressure values in stages to achieve the same lamination effect as the secondary lamination in the prior art with only one lamination. Since the one lamination step is reduced, relatively Compared with the prior art, the present invention can prevent chip displacement, reduce the scrap rate of substrings, shorten the entire process time of lamination, and improve production efficiency. Thin.

Description

A kind of photovoltaic module and preparation method thereof

technical field

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module and a preparation method thereof.

Background technique

The manufacturing process of photovoltaic modules includes lamination process, which presses the various layers of photovoltaic modules together.

In the prior art, during lamination, since the film layer located around the chip and the film layer located on the outer surface of the entire photovoltaic module (that is, the film layer bonded to the protective layer and the film layer bonded to the substrate layer) are in the same Lamination under pressure will lead to poor lamination and easy peeling between the chip and the adhesive layer. Therefore, two laminations are usually carried out, that is, the film layers near the chip are laminated for the first time to obtain substrings, and then the substrings are respectively bonded to the film layer bonded to the protective layer and the film bonded to the substrate layer. Layers are laminated twice to complete the entire lamination process.

The inventor found in the process of implementing the present invention that although the secondary lamination technology in the prior art can solve the problem of poor lamination effect of the primary lamination, due to the addition of a lamination step, the entire lamination process is long time.

Contents of the invention

(1) Purpose of the invention

The object of the present invention is to provide a method for preparing photovoltaic modules with good lamination effect, short process time and thin thickness.

(2) Technical solution

In order to solve the above problems, the first aspect of the present invention provides a method for preparing a photovoltaic module, including: laying each component of the photovoltaic module; wherein, the various components include: a protective layer, an adhesive layer, a chip Lamination layer and substrate layer; lamination of each component that has been laid; wherein, the lamination process is divided into multiple stages, and the vacuum pressure values of multiple stages are different.

Furthermore, in the method for preparing a photovoltaic module, there is no interruption between the multiple stages.

Further, in the method for preparing a photovoltaic module, in the multiple stages, the pressure value increases from the first stage to the last stage.

Further, in the preparation method of the photovoltaic module, the lamination process is divided into the following three stages: in the first stage, the pressure value of the vacuum is: -60KPa—-80KPa; in the second stage, The pressure value of the vacuum pumping is: -30KPa--50KPa; in the third stage, the pressure value of the vacuum pumping is: 0Pa--20KPa.

Further, the method for preparing photovoltaic modules, wherein, the duration of the first stage is: 1-120 seconds; the duration of the second stage is: 1-120 seconds; the duration of the third stage The duration of the phases is: 10-60 minutes.

Further, the method for preparing photovoltaic modules, wherein, the duration of the first stage is: 30-60 seconds; the duration of the second stage is: 30-60 seconds; the duration of the third stage The duration of the phase is: 25-35 minutes.

Further, in the method for preparing a photovoltaic module, among the multiple stages, the number of times of vacuuming in each stage is 6-10.

Furthermore, in the method for preparing a photovoltaic module, among the multiple stages, the number of times of vacuuming in each stage is the same.

Furthermore, in the method for preparing a photovoltaic module, heating is included in the lamination process; the heating temperature at each stage is 120-180 degrees Celsius.

Further, the method for preparing the photovoltaic module, wherein laying the various components of the photovoltaic module includes: sequentially laying the first adhesive layer, the first water-blocking film, and the second adhesive layer on the substrate layer , chip layer, third bonding layer, second water blocking film, fourth bonding layer and protective layer.

According to another aspect of the present invention, a photovoltaic module is provided, which is manufactured by using the method for preparing a photovoltaic module described in any one of the above.

(3) Beneficial effects

The technical solution of the present invention has the following beneficial technical effects:

1. One-time lamination can achieve the lamination effect of tight lamination and not easy to delaminate that can be achieved by two laminations in the prior art;

2. One lamination step is reduced and the entire lamination process time is shortened;

3. Reduce the number of times the chip is moved during the lamination process to avoid chip displacement;

4. Compared with the existing technology, the thickness of the entire photovoltaic module is thin, and the user's hand feeling experience is good.

Description of drawings

Fig. 1 is a flow chart of the steps of Embodiment 1 of the preparation method of the photovoltaic module provided by the present invention;

Fig. 2 is a structural diagram of a photovoltaic module prepared by the method for preparing a photovoltaic module provided by the present invention;

Reference signs:

1. Protective layer, 2. Fourth bonding layer, 3. Second water blocking film, 4. Third bonding layer,

5. Chip layer, 6. Second bonding layer, 7. First water blocking film,

8. The first adhesive layer, 9. The substrate layer.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

Fig. 1 is a flow chart of the steps of Embodiment 1 of the method for preparing a photovoltaic module provided by the present invention. As shown in Figure 1, in this embodiment, the method for preparing a photovoltaic module includes the following steps S1 and S2:

S1, laying the various components of the photovoltaic module.

S2, laminating each component that has been laid.

Wherein, the lamination process is divided into multiple stages, and the vacuuming pressure values of the multiple stages are different.

The beneficial effect of the embodiment of the present invention is: in the process of one lamination, by adopting different pressure values in stages, only one lamination can achieve the same lamination effect as the secondary lamination in the prior art, because One lamination step is reduced. Compared with the prior art, the embodiment of the present invention prevents chip displacement, can reduce the scrap rate of substrings, shortens the entire process time of lamination, and improves production efficiency. The thickness of the photovoltaic module using secondary lamination is thinner (according to multiple experimental data, the photovoltaic module prepared by the present invention is about 0.2 mm thinner than the photovoltaic module using secondary lamination).

In another embodiment of the method for manufacturing a photovoltaic module, based on the above embodiments, there is no interruption between the multiple stages. It should be noted that the non-intermittent between multiple stages means that in the lamination process, although the pressure value of each stage is different, the various components are subjected to continuous pressure during the whole process.

In another embodiment of the method for manufacturing a photovoltaic module, on the basis of the above embodiments, in the multiple stages, the pressure value increases from the first stage to the last stage.

The further beneficial effect of this embodiment is: because the photovoltaic module placed in the laminator, the internal adhesive layer is gradually melted from the outer layer to the inner layer under heating conditions, that is, the outer layer melts first, and then melts again For the inner layer, if the outer layer is melted and the inner layer is not yet melted, too much pressure is applied, which will easily cause the outer layer of the adhesive layer to be over-pressurized and overflow. In the lamination process proposed by the present invention, the pressure value is increased from the first stage to the last stage, matching the melting process of the adhesive layer, preventing the outer layer from melting but the inner layer from being over-pressurized and overflowing .

In another embodiment of the preparation method of photovoltaic modules, on the basis of the above embodiments, the lamination process is divided into the following three stages: in the first stage, the pressure value of the vacuum is: -60KPa; in the second stage In the second stage, the pressure value of the vacuum pumping is: -30KPa; in the third stage, the pressure value of the vacuum pumping is: 0Pa.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiments, the lamination process is divided into the following three stages: in the first stage, the pressure value of the vacuum is: -65KPa; In the second stage, the pressure value of the vacuum pumping is: -40KPa; in the third stage, the pressure value of the vacuum pumping is: -10KPa.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiments, the lamination process is divided into the following three stages: in the first stage, the pressure value of the vacuum is: -80KPa; in the second stage In the second stage, the pressure value of the vacuum pumping is: -50KPa; in the third stage, the pressure value of the vacuum pumping is: -20KPa.

In another embodiment of the method for manufacturing a photovoltaic module, on the basis of the above embodiments, wherein, in the multiple stages, the time of the lamination process is 20-35 minutes.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, wherein, the duration of the first stage is: 10 seconds; the duration of the second stage is: 10 seconds ; The duration of the third stage is: 20 minutes.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, wherein, the duration of the first stage is: 30 seconds; the duration of the second stage is: 30 seconds ; The duration of the third stage is: 20 minutes.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, wherein, the duration of the first stage is: 50 seconds; the duration of the second stage is: 50 seconds ; The duration of the third stage is: 30 minutes.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, wherein, the duration of the first stage is: 120 seconds; the duration of the second stage is: 120 seconds ; The duration of the third stage is: 60 minutes.

In another embodiment of the method for manufacturing a photovoltaic module, on the basis of the above embodiments, the duration of each of the multiple stages is the same.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, among the multiple stages, the number of times of vacuuming at each stage is 6.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, among the multiple stages, the number of times of vacuuming at each stage is 8.

In another embodiment of the method for preparing a photovoltaic module, on the basis of the above embodiment, among the multiple stages, the number of times of vacuuming at each stage is 10.

In another embodiment of the method for manufacturing a photovoltaic module, on the basis of the above embodiments, the times of vacuuming in each of the multiple stages are the same.

Fig. 2 is a structural diagram of a photovoltaic module prepared by the method for preparing a photovoltaic module provided by the present invention.

As shown in Figure 2, in another embodiment of the method for preparing a photovoltaic module, on the basis of the above-mentioned embodiment, laying the various components of the photovoltaic module described in step S1 includes: sequentially laying the first A bonding layer, a first water blocking film, a second bonding layer, a chip layer, a third bonding layer, a second water blocking film, a fourth bonding layer and a protective layer. Wherein, the base layer can be a base layer made of PET/AL/PET material, wherein PET: the Chinese name is polyethylene terephthalate, and the chemical formula is COC6H4COOCH2CH2O. The protective layer adopts high-efficiency water-blocking film or light-transmitting flexible film, such as ETFE surface film layer (ETFE: ethylene-tetrafluoroethylene copolymer). The first bonding layer, the second bonding layer, the third bonding layer, and the fourth bonding layer adopt any one of EVA, POE, PVB, and TPO. Among them, EVA: The Chinese name is ethylene-vinyl acetate copolymer, and the full English name is ethylene-vinyl acetate copolymer. POE: Chinese name is high polymer of ethylene and butene or high polymer of ethylene and octene; PVB: Chinese name is polyvinyl butyral, English full name is polyvinyl butyral; TPO: Chinese name is 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide; English full name is 2,4,6-trimethylbenzoyldiphenyl phosphine oxide.

In another embodiment, a fifth adhesive layer, a window cloth and a sixth adhesive layer are arranged before the fourth adhesive layer and the protective layer.

In another embodiment, before laying the components of the photovoltaic module, it further includes: electrically connecting a plurality of photovoltaic chips (connection in series, parallel or hybrid connection of series and parallel) to obtain a chip layer.

According to another aspect of the present invention, a photovoltaic module is provided, which is manufactured by using the method for preparing a photovoltaic module described in any one of the above.

It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention cover all changes and modifications that come within the scope and metespan of the appended claims, or equivalents of such scope and metesight.

Claims (9)

1. a kind of preparation method of photovoltaic module characterized by comprising

Each building block of photovoltaic module is laid；Wherein, each component part include: protective layer, adhesive layer, Chip layer and substrate layer；

The each building block completed to laying is laminated；Wherein, lamination process is divided into multiple stages, and the pumping in multiple stages is true Empty pressure value is different.

2. preparation method according to claim 1, which is characterized in that wherein, in the multiple stage, pressure value is from first A stage to a last stage is incremented by.

3. preparation method according to claim 2, which is characterized in that lamination process is divided into following three phases:

In first stage, the pressure value vacuumized are as follows: -60KPa--80KPa；

In second stage, the pressure value vacuumized are as follows: -30KPa--50KPa；

In three phases, the pressure value vacuumized are as follows: 0KPa--20KPa.

4. preparation method according to claim 3, which is characterized in that

The duration of the first stage are as follows: 1-120 seconds；

The duration of the second stage are as follows: 1-120 seconds；

The duration of the three phases are as follows: 10-60 minutes.

5. preparation method according to claim 3, wherein

The duration of the first stage are as follows: 30-60 seconds；

The duration of the second stage are as follows: 30-60 seconds；

The duration of the three phases are as follows: 25-35 minutes.

6. preparation method according to claim 1-5, wherein include vacuumizing in lamination process；It is the multiple In stage, the number that vacuumizes in each stage is 6-10 times.

7. preparation method according to claim 6, wherein in the multiple stage, each stage vacuumizes number phase Together.

8. preparation method according to claim 1-5, wherein include heating in lamination process；Each rank The heating temperature of section is 120-180 degrees Celsius.

9. a kind of photovoltaic module, which is characterized in that be made using the described in any item preparation methods of claim 1-9.