CN106784158B - A kind of bonding method of solar cell - Google Patents

Abstract

The invention discloses a solar cell pasting method, which includes the following steps: step 1, pasting the lower surface of the protective sheet on the upper surface of the solar cell string, the through holes on the protective sheet and the protruding parts of the interconnection sheet of the solar cell string Standard; Step 2, apply silica gel on the substrate, and paste the solar cell string with the protective sheet on the substrate; Step 3, place the substrate with the pasted solar cell string between two fixed metal plates, place on the substrate Rectangular airbag, inflate the airbag to make the pressure in the airbag higher than the atmospheric pressure, use the airbag to pressurize the substrate pasted with the solar cell string and keep it for a certain period of time; step 4, deflate the airbag, then take out the airbag and the substrate, and remove the protective cover piece. This method can prevent the solar battery strings from being distorted and deformed during the pasting process or that the battery strings slip under pressure to affect the regularity. Since the airbag is used to pressurize the substrate as a whole, the flatness of the pasted solar battery strings can be guaranteed.

Description

A method for pasting solar cells

technical field

The invention relates to battery technology, in particular to a solar battery pasting method.

Background technique

Most of the spacecraft are powered by solar cell arrays. In the production process of solar cell arrays, solar cell sheets need to be connected in series to form solar cell strings, and then the solar cell strings are pasted on the substrate. Currently, the commonly used solar cell arrays for space The traditional solar cell pasting method is not effective in controlling the uniformity and flatness of the solar cell pasting.

Contents of the invention

The problem solved by the invention is that the conventional space solar cell array has poor regularity and flatness in the pasting process of solar cells.

In order to solve the above problems, the present invention provides a method for pasting solar cells, the method comprising the following steps:

Step 1, paste the lower surface of the protective sheet on the upper surface of the solar cell string, and align the through hole on the protective sheet with the protruding part of the interconnection sheet of the solar cell string;

Step 2, coating silica gel on the substrate, and pasting the solar battery string with the protective sheet on the substrate;

Step 3: Place the substrate with solar battery strings pasted between two fixed metal plates, place a rectangular airbag on the substrate, inflate the airbag to make the pressure in the airbag higher than the atmospheric pressure, and use the airbag to press the substrate with solar battery strings Pressurize and keep it for a certain period of time;

Step 4, deflate the airbag, then take out the airbag and substrate, and remove the protective sheet.

Further, the length of the protection sheet is greater than the length of the solar cell string, the width of the protection sheet is smaller than the width of the solar cell string, and the protection sheet has a through hole corresponding to the protruding part of the interconnection sheet, and the length and width of the through hole are respectively larger than the protruding part length and width.

Further, the length of the protection sheet is greater than the length of the solar cell string, the width of the protection sheet is smaller than the width of the solar cell string, and the protection sheet has a through hole corresponding to the protruding part of the interconnection sheet, and the length and width of the through hole are respectively larger than the protruding part length and width.

Further, the protective sheet is made of light and thin material, preferably PET.

Further, when inflated, the pressure of the airbag is 4-20kPa higher than the atmospheric pressure.

Further, the time for the airbag to pressurize the substrate on which the solar battery string is pasted is more than 4 hours.

Compared with the prior art, the present invention has the following advantages:

1. Since the solar cell strings are protected by protective sheets, it can prevent the solar cell strings from being distorted and deformed during the pasting process or from slipping under pressure and affecting the orderliness.

2. Since the airbag is used to pressurize the substrate as a whole, the flatness of the solar cell string can be guaranteed.

Description of drawings

FIG. 1 is a schematic top view of a current solar cell string;

FIG. 2 is a schematic side view of a current solar battery string;

Fig. 3 is the structural representation of protective sheet of the present invention;

Fig. 4 is a schematic diagram of the overall pressurization method of the present invention.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

As shown in Figures 1 and 2, the solar cell string 1 is composed of solar cell sheets 11 and interconnection sheets 12, one end of the interconnection sheet 12 in the middle of the solar cell string 1 is welded to the front of the solar cell sheet 11, and the other end is welded to the front of the solar cell sheet 11. It is welded to the back of the solar battery sheet 11 , and the interconnection sheet 12 has a protruding part 121 on the front of the solar battery string 1 .

As shown in Figure 3, the protection sheet 2 is made of light and thin material, such as PET, the length of the protection sheet 2 is greater than the length of the solar cell string 1, and the width of the protection sheet 2 is smaller than the width of the solar cell string 1, and the protection sheet 1 corresponds to the interconnection The protruding portion 121 of the sheet 12 has a through hole 21 , and the length and width of the through hole 21 are respectively greater than the length and width of the protruding portion 121 .

Further, the lower surface of the protective sheet 2 is coated with self-adhesive.

The pasting mode of solar cell of the present invention is as follows:

Step 1, paste the lower surface of the protective sheet 2 on the upper surface of the solar cell string 1 , and align the through hole 21 on the protective sheet 2 with the protruding part 121 of the interconnection sheet 12 of the solar cell string 1 .

Step 2, coating silica gel on the substrate 3 , and pasting the solar cell string 1 with the protective sheet 2 on the substrate 3 .

Step 3, as shown in Figure 4, put the substrate 3 pasted with the solar battery string 1 between two fixed metal plates 4, place a rectangular airbag 5 on the substrate 3, and inflate the airbag 5 so that the pressure ratio in the airbag is Atmospheric pressure is 4 to 20 kPa, and the substrate 3 on which the solar battery string 1 is pasted is pressurized with the airbag 5 and kept for more than 4 hours.

Step 4, deflate the airbag 5, then take out the airbag 5 and the substrate 3, and remove the protective sheet 2.

Since the solar cell string 1 is protected by the protective sheet 2, it can prevent the solar cell string 1 from being distorted and deformed during the pasting process or that the cell string 1 is slipped under pressure to affect the orderliness. Pressing can ensure the flatness of the solar battery string 1 pasting.

Claims (6)

1. a kind of bonding method of solar cell, it is characterized in that：Include the following steps：

The lower surface of screening glass, is pasted onto the upper surface of solar battery string by step 1, through hole and solar cell on screening glass The protruding parts alignment mutually in flakes of string；

Step 2, is coated with silica gel on substrate, and the solar battery string for pasting screening glass is pasted onto on substrate；

Step 3, between the substrate for pasting solar battery string is placed on two pieces of fixed metallic plates, places rectangle on substrate Air bag, make pressure ratio atmospheric pressure in air bag high to airbag aeration, the substrate for pasting solar battery string added with air bag Press and kept for certain time；

Step 4, to air bag deflation, then takes out air bag and substrate, removes screening glass.

2. the bonding method of solar cell as claimed in claim 1, it is characterized in that：The length of the screening glass is more than sun electricity The length of pond string, the width of screening glass are less than the width of solar battery string, and the protruding parts that screening glass corresponds to mutually in flakes are outputed logical Hole, the length and width of through hole are respectively greater than the length and width of protruding parts.

3. the bonding method of solar cell as claimed in claim 1, it is characterized in that：The screening glass uses light basis weight material system Into.

4. the bonding method of solar cell as claimed in claim 1, it is characterized in that：The screening glass uses PET.

5. the bonding method of solar cell as claimed in claim 1, it is characterized in that：The pressure ratio air of air bag during inflation Press high 4 ~ 20kPa.

6. the bonding method of solar cell as claimed in claim 1, it is characterized in that：The air bag is to pasting solar battery string More than when the time that substrate pressurizes is 4 small.