CN104900753A - EVA adhesive film packaging technology - Google Patents

Abstract

The invention discloses an EVA adhesive film encapsulation process, which is used for manufacturing a solar cell panel provided with an EVA adhesive film. A vacuuming step between the lamination and the heating step, the vacuuming step adopts a double vacuum laminator; the heating is to heat the laminate under the vacuum condition of the vacuuming step, and the heating temperature of the heating is between Between 130-145°C, at the same time, a pressurization step is carried out during this process. The pressurization step is to slowly restore the atmospheric pressure in the upper chamber, and the above slow recovery is to make the pressure in the upper chamber linear in a time of not less than 3min Return to atmospheric pressure. The process route is simple and is beneficial to the packaging quality of the solar battery panel.

Description

A kind of EVA film encapsulation process

technical field

The invention relates to the field of manufacturing methods of photovoltaic energy-saving equipment, in particular to an EVA film encapsulation process.

Background technique

Conventional energy sources such as coal, oil, and natural gas are increasingly depleted, and there are more and more problems caused by energy shortages in the world. As a clean, pollution-free, inexhaustible energy source, solar energy has played a very important role in the utilization of new energy sources in recent years. Important role, the existing urban street lighting facilities, the solar photovoltaic panel power generation group that has begun to take shape, and even the photovoltaic panels installed on the roof of the family have made outstanding contributions to reducing the dependence of existing production and life on the coal power industry. contribute.

The solar cell panel in the prior art is a multi-layer composite structure, and the composite quality of materials in each layer has an important influence on the performance and service life of the solar cell panel.

Contents of the invention

Aiming at the problem that the solar cell panels in the above prior art are multi-layer composite structures, and the composite quality between the materials of each layer has an important influence on the performance and service life of the solar cell panels, the present invention provides an EVA glue Membrane encapsulation process.

In view of the problems referred to above, a kind of EVA adhesive film encapsulation process provided by the present invention achieves the purpose by following technical points: a kind of EVA adhesive film encapsulation process, is used for setting the manufacture of the solar cell panel of EVA adhesive film, comprises the following sequence that carries out Steps: lamination, heating, pressurization, heat preservation and solidification, cooling, and a vacuuming step arranged between the lamination and the heating step, the vacuuming step adopts a double vacuum laminator, that is, the laminate obtained in the lamination step Placed in the lower chamber of a double vacuum laminator, the upper and lower chambers of the double vacuum laminator are evacuated at the same time, and the vacuum degree of the upper and lower chambers is kept at a working condition of not more than 0.05MPa for not less than 5min ;

The heating is to heat the laminate under the vacuum condition of the vacuuming step, the heating temperature of the heating is between 130-145°C, and a pressurization step is carried out during this process, and the pressurization step is slow recovery Atmospheric pressure in the upper chamber is slowly recovered so that the pressure in the upper chamber is linearly restored to atmospheric pressure within a period of not less than 3 minutes.

Specifically, in this process route, by setting a vacuum step between the stacking and heating steps, and at the same time limiting the process parameters of the vacuum step, it is beneficial to avoid the occurrence of interlayers from the environment in the subsequent process route of the solar cell panel. Bubbles: The limitation of the process parameters in the heating step can prevent the gas generated by the thermal decomposition of components such as crosslinking agents in the stack during the heating process from being precipitated into the interlayer to form interlayer bubbles. Therefore, this process route is conducive to the encapsulation quality of the EVA adhesive film, and is conducive to improving the product performance of the solar cell panel.

A further technical solution is:

As a process route selection that is conducive to filling the gaps between battery sheets by softening the EVA film in advance, in the heating step, before the heating temperature is between 130-145 ° C, a preheating and melting process is also included, so The preheating process is to heat the laminate to 110-115° C. for 3-8 minutes.

As a high-efficiency process route for filling the gaps between battery sheets, in the heating step, before the heating temperature is between 130-145°C, a preheating and melting process is also included, and the preheating process is to make the laminate Heat to 125-130°C for 3-5min.

As a rapid curing process, the heat preservation curing step is to place the laminated laminate obtained in the pressurizing step in an oven, cure it at a temperature of 130-135° C. for 10-15 minutes, and then cool it in air.

As a curing process that is easy to operate and conducive to production efficiency, the heat preservation curing step is carried out in a double vacuum laminator, and the temperature in the double vacuum laminator is set between 100-110 °C, while the laminated laminate is maintained at 2-5min under vacuum condition.

The present invention has the following beneficial effects:

The process route is simple. By setting a vacuum step between the stacking and heating steps, and at the same time limiting the process parameters of the vacuum step, it is beneficial to avoid interlayer air bubbles from the environment in the subsequent process route of the solar cell panel; The limitation of the process parameters in the heating step can prevent the gas generated by the thermal decomposition of components such as cross-linking agent in the stack during the heating process from being precipitated into the interlayer to form interlayer bubbles. Therefore, this process route is conducive to the encapsulation quality of the EVA adhesive film, and is conducive to improving the product performance of the solar cell panel.

Detailed ways

Below in conjunction with embodiment the present invention is described in further detail, but structure of the present invention is not limited to following embodiment:

Example 1:

A kind of EVA adhesive film encapsulation process, is used for the manufacture of the solar battery panel that is provided with EVA adhesive film, comprises the following steps that carry out in order: lamination, heating, pressurization, heat preservation solidification, cooling, also includes being arranged in lamination and heating The vacuuming step between the steps, the vacuuming step adopts a double vacuum laminator, the laminate obtained in the stacking step is placed in the lower chamber of the double vacuum laminator, and the upper and lower chambers of the double vacuum laminator are simultaneously Vacuumize, and keep the vacuum degree of the upper and lower chambers at a working condition of not more than 0.05MPa for not less than 5 minutes;

The heating is to heat the laminate under the vacuum condition of the vacuuming step, the heating temperature of the heating is between 130-145°C, and a pressurization step is carried out during this process, and the pressurization step is slow recovery Atmospheric pressure in the upper chamber is slowly recovered so that the pressure in the upper chamber is linearly restored to atmospheric pressure within a period of not less than 3 minutes.

Specifically, in this process route, by setting a vacuum step between the stacking and heating steps, and at the same time limiting the process parameters of the vacuum step, it is beneficial to avoid the occurrence of interlayers from the environment in the subsequent process route of the solar cell panel. Bubbles: The limitation of the process parameters in the heating step can prevent the gas generated by the thermal decomposition of components such as crosslinking agents in the stack during the heating process from being precipitated into the interlayer to form interlayer bubbles. Therefore, this process route is conducive to the encapsulation quality of the EVA adhesive film, and is conducive to improving the product performance of the solar cell panel.

Example 2:

This embodiment is further limited on the basis of Example 1, as a process route selection that is beneficial to soften the EVA film in advance to fill the gaps between the battery sheets. In the heating step, the heating temperature is between 130- Before the temperature is between 145° C., a preheating and melting process is also included, and the preheating process is to heat the laminate to 110-115° C. for 3-8 minutes.

As a high-efficiency process route for filling the gaps between battery sheets, in the heating step, before the heating temperature is between 130-145°C, a preheating and melting process is also included, and the preheating process is to make the laminate Heat to 125-130°C for 3-5min.

As a rapid curing process, the heat preservation curing step is to place the laminated laminate obtained in the pressurizing step in an oven, cure it at a temperature of 130-135° C. for 10-15 minutes, and then cool it in air.

As a curing process that is easy to operate and conducive to production efficiency, the heat preservation curing step is carried out in a double vacuum laminator, and the temperature in the double vacuum laminator is set between 100-110 °C, while the laminated laminate is maintained at 2-5min under vacuum condition.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other implementations obtained without departing from the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. an EVA adhesive film packaging technology, for to the manufacture of solar panel arranging EVA adhesive film, comprise the following steps that order is carried out: lamination, heating, pressurization, heat preservation solidification, cooling, it is characterized in that, also comprise the vacuum step be arranged between lamination and heating steps, described vacuum step adopts two vacuum laminator, the laminates obtained by Stacking steps is placed in the lower room of two vacuum laminator, two vacuum laminator upper, lower two Room vacuumize simultaneously, and make, the vacuum degree of lower two Room keeps being no less than 5min under the operating mode being not more than 0.05MPa,

Described being heated to be is heated laminates under the vacuum condition of vacuum step, the heating-up temperature of described heating is between 130-145 DEG C, carry out pressurization steps in this process simultaneously, described pressurization steps is slowly recover the atmospheric pressure in upper room, and above slow recovery linearly returns to atmospheric pressure to make the pressure in room within the time being no less than 3min.

2. a kind of EVA adhesive film packaging technology according to claim 1, it is characterized in that, in heating steps, before heating-up temperature is between 130-145 DEG C, also comprise preheating and melt operation, described preheating procedure keeps 3-8min for laminates being heated to 110-115 DEG C.

3. a kind of EVA adhesive film packaging technology according to claim 1, it is characterized in that, in heating steps, before heating-up temperature is between 130-145 DEG C, also comprise preheating and melt operation, described preheating procedure keeps 3-5min for laminates being heated to 125-130 DEG C.

4. a kind of EVA adhesive film packaging technology according to claim 1, is characterized in that, heat preservation solidification step is that laminate layers overlapping piece pressurization steps obtained is placed in baking oven, air cooling after temperature solidifies 10-15min under the condition of 130-135 DEG C.

5. a kind of EVA adhesive film packaging technology according to claim 1, it is characterized in that, heat preservation solidification step is carried out in two vacuum laminator, and arrange temperature in two vacuum laminator between 100-110 DEG C, laminate layers overlapping piece keeps 2-5min under vacuum simultaneously.