CN105336815B - Manufacturing method of photovoltaic hyperboloidal double-glass module - Google Patents

Abstract

The invention discloses a method for manufacturing a photovoltaic hyperboloid double-glass module, which specifically includes the following steps: placing a photovoltaic adhesive layer on the curved glass of the lower cover plate, and laying a battery string on the lower layer of photovoltaic adhesive layer; Wrap the initial shape of the component; place the wrapped component in a vacuum bag, place the vacuum nozzle on the air guide felt above the component's initial shape, and then seal it completely with a vacuum bag; connect the vacuum nozzle with a vacuum pump, Vacuum the vacuum bag to form a semi-finished component; put the semi-finished component into a curing furnace for thermoforming; after cooling down to room temperature, disassemble and wipe the semi-finished component; finally put it into an autoclave for secondary curing. The application of the present invention can make the produced hyperboloid double glass components well combined with the installation structure, ensure the quantitative production of hyperboloid double glass components, reduce the scrap rate of components, reduce the production cost of components, and improve the The market competitiveness of hyperbolic double glass modules.

Description

A method for manufacturing a photovoltaic hyperboloid double-glass module

technical field

The invention relates to the technical field of solar photovoltaic power generation, in particular to a method for manufacturing a double-glass module.

Background technique

Solar power is a new kind of energy, which has the characteristics of environmental protection, energy saving, inexhaustible and so on. In the current environment of resource shortage in the world, solar power has won the favor of more and more users with its inherent characteristics. Favored, so solar modules came into being, its role is to convert solar energy into electrical energy. With the continuous improvement of people's environmental protection concept, the photovoltaic application system composed of solar modules has also attracted more and more attention. Development, curved double-glass components are combined with various vehicles and installed on the top of the vehicle, which is both beautiful and capable of generating electricity. However, the singleness of curved double-glass modules and the instability of the production process have become stumbling blocks restricting development. The demand for quantitative production of curved double-glass modules, especially the quantitative production process of hyperbolic double-glass modules has become an important problem in the photovoltaic industry.

However, most of the photovoltaic curved double-glass modules currently on the market are flat and single-curved. Single-curved double-glass modules can only adjust the length of the curved surface, and the shape and structure are single, and they cannot be completely combined with the installation structure; in addition, It is also limited by the radian and cannot meet the market demand to the maximum extent. Photovoltaic hyperbolic double-glass modules fill the gap in the structure of curved double-glass modules and meet the needs of the market.

During the production of traditional double-glass modules, only traditional flat lamination machines can be used for lamination, or vacuum rubber rings can be used for fixing, and the edges are bonded with high-temperature adhesive tape. During the evacuation process, it is easy to cause edge cells to deviate and vacuum glue. Problems such as air leakage in the ring and blockage of the vacuum air pipe during the evacuation process occurred, and the component scrap rate was high. In addition, for photovoltaic hyperboloid double-glass modules, both the hyperbolic glass and the module have a curved structure with complex shapes. The traditional production process cannot meet the production of hyperboloid double-glass modules. The yield rate is low and the cost is high. Realize batch production, can't form competitiveness.

Contents of the invention

The technical problem to be solved in the present invention is to provide a manufacturing method suitable for hyperboloid double-glass components, which can improve the yield of components, reduce the production cost of components and improve their market competitiveness on the basis of ensuring the production quality of components.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

A method for manufacturing a photovoltaic hyperboloid double-glass module, the method specifically includes the following steps:

A. Place the photovoltaic adhesive layer on the curved glass of the lower cover plate,

B. laying battery strings above the lower photovoltaic bonding layer;

C. Combine the pieces to form the initial shape of the component;

D. The initial shape of the package component;

E. Place the packaged initial shape of the component in a vacuum bag, place the vacuum nozzle on the air guide felt above the initial shape of the component, and then seal it completely with the vacuum bag;

F. Connect the vacuum nozzle with a vacuum pump to vacuumize the vacuum bag to form a semi-finished component;

G. Put the component semi-finished product into the curing furnace for thermoforming;

H. After dropping to normal temperature, disassemble and wipe the semi-finished product of the component;

I. Finally, put it into the autoclave for secondary curing.

In the manufacturing method of the above-mentioned photovoltaic hyperboloid double-glass module, the welding method of the battery string described in step B is as follows: scribing the battery slices, laying the sliced battery slices along the arc of the glass on the lower cover plate, and connecting the sliced batteries with welding ribbons During the welding process, the arch height of the welding ribbon is less than 1mm; place small pieces of adhesive between the welding strips, place small pieces at the four corners of the diced battery sheet, and place adhesive strips between the battery strings; finally use the confluence The strips are welded as a whole.

In the above method for manufacturing a photovoltaic hyperboloid double-glass module, the operation process of the combination described in step C is as follows: placing the upper photovoltaic adhesive layer and the curved glass of the upper cover plate on the battery string in order to form the initial shape of the module; The initial shape of the component is tested by EL until the initial shape of the component is complete.

In the manufacturing method of the above-mentioned photovoltaic hyperboloid double-glass module, the specific steps of step D are as follows: first, wrap non-stick cloth film around the initial shape of the module; then wrap air-conducting gauze on the surface of the initial shape of the module, and fix it with wood grain tape; Then wrap the air-conducting felt on the outer layer of the air-conducting gauze and fix it with wood-grain tape.

In the manufacturing method of the above-mentioned photovoltaic hyperboloid double-glass module, when the vacuum bag is evacuated in step F, the evacuation time is 60-80 minutes, and the vacuum degree is not lower than 98kpa.

In the manufacturing method of the above-mentioned photovoltaic hyperboloid double-glass module, the curing process of the curing furnace in step G is divided into three stages: the first stage, the curing temperature is 90 degrees, and it is kept for 30 minutes; the second stage, the curing temperature is 100 degrees , keep for 100 minutes; in the third stage, the curing temperature is 120, keep for 120 minutes; during the curing period, the vacuum degree of the component semi-finished product is not lower than 98kpa.

The manufacturing method of above-mentioned a kind of photovoltaic hyperboloid double-glass component, the curing process of autoclave in step I is divided into three stages: the first stage, the pressure value is 0.6Mpa, and curing temperature is 70 degrees, keeps 30 minutes; The second stage , the pressure value is 0.8Mpa, the curing temperature is 90 degrees, keep for 20 minutes; the third stage, the pressure value is 1Mpa, the curing temperature is 130 degrees, keep for 50 minutes; the air release temperature is 40 degrees.

Due to the adoption of the above technical solutions, the technological progress achieved by the present invention is as follows.

The present invention abandons the vacuum apron, and adopts production methods such as controlling the arc height of the welding belt, adding small pieces of adhesives inside the components, adding air-conducting gauze and air-conducting felt, cold evacuating the vacuum bag, thermoforming in the curing furnace, and secondary curing in an autoclave. It solves the technical problems such as cell fragmentation, ribbon bending, cell edge deviation, vacuum apron air leakage, and vacuum tube blockage, so that the hyperbolic double-glass modules produced can be well combined with the installation structure, ensuring Quantitative production of hyperboloid double-glass modules reduces the scrap rate of components, reduces the production cost of modules, and improves the market competitiveness of hyperboloid double-glass modules.

detailed description

The present invention will be further described in detail below in conjunction with specific embodiments.

A method for manufacturing a photovoltaic hyperboloid double-glass module is applied in the field of photovoltaic power generation to reduce the difficulty of the production process and enable quantitative production of the photovoltaic hyperboloid double-glass module. Manufacturing method of the present invention specifically comprises the following steps:

A. Place a photovoltaic adhesive layer on the curved glass of the lower cover.

First, clean the curved glass of the lower cover, and place the dried curved glass of the lower cover on the workbench; then lay the cut photovoltaic bonding layer on the curved glass of the cover. In the present invention, PVB adhesive film can be used for the photovoltaic bonding layer.

B. laying the battery string on the lower photovoltaic adhesive layer, specifically including the following steps.

B1. When selecting cells, the color of the cells must be consistent during the selection process, and the cells must not have appearance problems such as chipped edges and missing corners.

B2. Scribe the cells without problems.

B3. Lay the scribed cells along the curved glass arc of the lower cover plate, and connect the scribed cells with welding ribbons to form a battery string. During the process of placing the battery slices for scribing, stress differences should be avoided, and the placement of the battery slices should be avoided in the position where the glass arc is large, and the welding ribbon connected in the middle should be used instead. When welding, manual welding must be used, two fingers are evenly applied, and each ribbon is gently pushed with a finger to ensure that the arch height of the ribbon is consistent, the height is <1mm, and the ribbon is not allowed to deviate from the main grid line.

B4. Place small sticky pieces between the solder strips, place small pieces at the four corners of the diced cell, and place sticky strips between the battery strings; finally weld them as a whole with bus bars. Each bonding small piece is placed in the center, and the distance between the bonding small piece and the left and right welding strips is preferably about 5 mm, which plays the role of cushioning and supporting, and at the same time, avoids bending the welding strip during the integration of the small bonding pieces. The adhesive strip should be placed in the center, and it is advisable to keep 3-5mm at the same time.

C. Combine the pieces to form the initial shape of the component.

The operation process of assembling is as follows: place the upper photovoltaic adhesive layer and the curved glass of the upper cover on the battery string in sequence to form the initial shape of the module; then conduct EL test on the initial shape of the module until the initial shape of the module is intact.

During the assembling process, ensure that the cells cannot be moved or broken, and the upper and lower parts of the glass are evenly combined, and no wrong pieces are allowed on site; during the EL test, the components should be gently lifted to find out the problematic cells. It should be replaced in time, and the test should be carried out after replacement until there is no problem. If there are sundries inside the module, use a suction cup to suck up the surrounding glass at the same time to remove the sundries. It is forbidden to lift one side of the glass to remove the sundries to prevent the stress on the other end of the glass from being too concentrated and crushing the battery.

D. The initial shape of the package component.

First, inspect the laid glass components, and after confirming that there is no appearance quality problem, wrap non-stick cloth film around the initial shape of the component; then wrap air-conducting gauze on the surface of the initial shape of the component, and fix it with wood grain tape; The outer layer of air gauze wraps the air-conducting felt and fixes it with wood-grain tape. The initial shape of the fully wrapped component is conducive to the full discharge of excess gas and moisture inside the component.

E. Place the wrapped component prototype in a vacuum bag, place the vacuum nozzle on the air-conducting felt above the component prototype, and then seal it completely with the vacuum bag.

In this embodiment, the vacuum bag should have no obvious foreign matter and no damage. The method of wrapping the initial shape of the component is as follows: lay the vacuum bag flat on the workbench, place the initial shape of the component in the middle of the vacuum bag, and ensure that there is enough space around the initial shape of the component for bonding of high-temperature sealing strips; put the vacuum nozzle Put it on the air-conducting felt above the module; stick the high-temperature sealing strip to the surrounding edge of the vacuum bag; then pick up the other side of the vacuum bag and fold it in half, and stick the vacuum bag with the sealing strip; the bonding is completed Finally, the sealing strip should be squeezed to ensure that there is no air leakage between the upper and lower vacuum membranes.

F. Connect the vacuum nozzle with a vacuum pump, and use sealing tape to seal the connection between the vacuum pump and the vacuum nozzle; vacuumize the vacuum bag, the cold pumping time is 60-80min, and the vacuum degree is not less than 98kpa to form a semi-finished component.

G. Put the component semi-finished product into the curing furnace for thermoforming.

Put the semi-finished components into the feeding cart. During the pushing process, avoid the components from hitting the frame of the feeding cart and scratch the vacuum bag; When feeding, the components hit the furnace wall and the output components are broken; during the operation of the equipment, regular inspections should be made, and it should not be left unattended for a long time.

The curing process is divided into three stages: the first stage, the curing temperature is 90 degrees, and keep for 30 minutes; the second stage, the curing temperature is 100 degrees, and keep for 100 minutes; the third stage, the curing temperature is 120, and keep for 120 minutes; The vacuum degree of the component semi-finished product is not lower than 98kpa.

H. After lowering to normal temperature, disassemble the semi-finished product of the wiping component.

After the curing is completed, push out the material trolley, remove the vacuum nozzle, and lift the component down to cool down. After the surface of the component has dropped to normal temperature, remove and wipe the component. Be careful to use even force when removing the non-stick cloth to avoid scratching the adhesive film on the edge of the glass.

I. Finally, put it into the autoclave for secondary curing.

Put the successfully cured components into the autoclave for secondary curing to strengthen the bonding strength of the components and prevent quality problems such as delamination and delamination of the components during use. During the operation of the autoclave: the first stage, the pressure value is 0.6Mpa, the curing temperature is 70 degrees, keep for 30 minutes; the second stage, the pressure value is 0.8Mpa, the curing temperature is 90 degrees, keep for 20 minutes; the third stage, The pressure value is 1Mpa, the curing temperature is 130 degrees, and it is kept for 50 minutes; the deflation temperature is 40 degrees.

The present invention controls the arc height of the ribbon and combines the components added between the cells, the four corners of the cell, and the battery strings to avoid the possibility of the cell being broken, and at the same time achieves the effect of a straight ribbon, making the appearance of the assembly more beautiful. The use of air-conducting gauze and air-conducting felt achieves the purpose of exporting excess gas and moisture in the module, improves the vacuum degree of the module, enhances the bonding degree of the module, and avoids the problems of deglue and delamination of the module. After the module is processed and formed, it is cold evacuated outdoors, which avoids the leakage of the vacuum bag during the evacuation process of the module, improves the vacuum strength of the module, avoids the generation of air bubbles, and improves the production efficiency of the module. The laminator replaced by the curing furnace makes it possible to produce photovoltaic hyperboloid glass double-glass modules.

The invention replaces the vacuum apron with a vacuum bag, avoids the limitation and non-plasticity of the apron, reduces the production cost of the component, solves the phenomenon that the vacuum apron falls off and reduces the vacuum degree, and ensures the safety of the photovoltaic hyperboloid double glass component. Yield rate; the use of vacuum bags instead of vacuum aprons can also meet the large curvature requirements of components, and can further fill the gap in the market for hyperbolic double-glass photovoltaic components and improve competitiveness.

Claims (6)

1. a kind of manufacture method of photovoltaic hyperboloid solar double-glass assemblies, it is characterised in that the manufacture method specifically includes following step Suddenly：

A. on lower cover bend glass place photovoltaic adhesive linkage,

B. battery strings are laid above lower floor's photovoltaic adhesive linkage；

C. piece is closed, component just shape is formed；

D. wrap up component just shape；First, in component, just shape surrounding wraps up not sticky cloth film；In component, just inducing QI yarn is wrapped up on shape surface again Cloth, and fixed with wood grain adhesive tape；Then again in inducing QI gauze outer layer covers inducing QI felt, and fixed with wood grain adhesive tape；

E. by the component for wrapping, just shape is placed in vacuum bag, and vacuum slot is placed on the inducing QI felt above the first shape of component On, then it is complete with vacuum bag sealing；

F. connect vacuum slot with vacuum pump, to bag vacuum, form component semi-finished product；

G. component semi-finished product are put into into curing oven thermoforming；

H., after being down to room temperature, Wipe assembly semi-finished product are dismantled；

I. being finally putting in autoclave carries out secondary solidification.

2. a kind of manufacture method of photovoltaic hyperboloid solar double-glass assemblies according to claim 1, it is characterised in that step B institute The welding manner for stating battery strings is：By cell piece scribing, scribing cell piece is laid along lower cover bend glass radian, using welding Connection scribing cell piece forms battery strings, and in welding process, welding sagitta is less than 1mm；Bonding fritter is placed between welding, is drawn Corner fritter is placed in the corner of piece cell piece, places adhesive strip between battery strings；Finally it is welded as a whole with busbar.

3. a kind of manufacture method of photovoltaic hyperboloid solar double-glass assemblies according to claim 1, it is characterised in that step C institute State close piece operating process be：Successively upper strata photovoltaic adhesive linkage, upper cover plate bend glass are placed in battery strings and form component First shape；Then to component, just shape carries out EL tests, and until component, just shape is intact.

4. the manufacture method of a kind of photovoltaic hyperboloid solar double-glass assemblies according to claim 1, it is characterised in that in step F During to bag vacuum, cold to find time as 60 ~ 80min, vacuum is not less than 98 kpa.

5. the manufacture method of a kind of photovoltaic hyperboloid solar double-glass assemblies according to claim 1, it is characterised in that in step G The solidification process of curing oven is divided into three phases：First stage, solidification temperature are 90 degree, are kept for 30 minutes；Second stage, solidification Temperature is 100 degree, is kept for 100 minutes；Phase III, solidification temperature 120 are kept for 120 minutes；Component semi-finished product during solidification Vacuum is not less than 98 kpa.

6. the manufacture method of a kind of photovoltaic hyperboloid solar double-glass assemblies according to claim 1, it is characterised in that in step I The solidification process of autoclave is divided into three phases：First stage, pressure value are 0.6Mpa, and solidification temperature is 70 degree, is kept for 30 points Clock；Second stage, pressure value are 0.8Mpa, and solidification temperature is 90 degree, is kept for 20 minutes；Phase III, pressure value are 1Mpa, Gu Change 130 degree of temperature, kept for 50 minutes；Discharge temperature is 40 degree.