WO2019024165A1 - Repair adhesive tape sticking process for photovoltaic module back-sheet and application thereof - Google Patents

Abstract

A photovoltaic component backing plate (7) is repaired by a repairing tape and its application. When only the backing plate (7) is abnormal, it is not necessary to replace all the photovoltaic components, and the partial repair or full repair of the backing plate can be damaged. The photovoltaic modules operate normally during the warranty period, effectively increasing the value of the photovoltaic modules and extending the service life of the photovoltaic modules.

Description

Repairing tape bonding process for photovoltaic module backboard and application thereof Technical field

The invention relates to the technical field of adhesive tapes, in particular to a repairing tape bonding process for a photovoltaic module backboard and an application thereof.

Background technique

The solar module backplane needs to have reliable insulation and water resistance to ensure the normal operation of the components. At present, there are two main types of component damage. One is that during the transportation and installation process, some of the component backplanes will be damaged and scratched, resulting in the failure of the components during operation and functional failure. The other is that the components are used outdoors. After a period of time, the backboard will gradually aging and cracking, and the safety requirements of the components will not be met.

Only the components can be replaced for the damaged back plate. If the mass is replaced, the cost is extremely high, and the recovery of the old components is difficult to cause environmental pollution. In view of this background, the development of a repair tape can be carried out on site, environmentally friendly, waste-free, and low-cost, so that damaged components can operate normally during the warranty period, which has far-reaching significance.

Technical solution

In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a repairing tape bonding process for a photovoltaic module back sheet and an application thereof. When only an abnormality occurs in the backing plate, it is not necessary to replace all the photovoltaic components, and the backing plate is passed. The repair can make the damaged PV modules operate normally during the warranty period, effectively increasing the value of the PV modules and prolonging the service life of the PV modules.

In order to achieve the above object, the present invention adopts the following technical solutions:

A repairing tape bonding process for a photovoltaic module backboard includes the following steps:

Step 1: Perform visual inspection on the back panel of the PV module, and judge whether the PV module back panel with abnormal appearance inspection results requires partial repair or full repair;

Step 2: Clean the back panel of the PV module to be repaired;

Step 3: using a repairing tape of the photovoltaic module back sheet to partially repair or completely repair the cleaned PV module back sheet;

Step 4: Verify the repair effect.

Further, in the first step, the photovoltaic module back plate is subjected to a wet leakage test to detect the insulation property to determine that it needs to be repaired. If the component area is greater than 0.1 m ² , the measured insulation resistance value multiplied by the component area is less than 40 MΩ. m ² , it needs to be fully repaired; if the component area is larger than 0.1m ² , the measured insulation resistance value multiplied by the component area is greater than or equal to 40MΩ·m ² , the component insulation test passes, but the appearance is still scratched. Perform partial repairs.

Further, the wet leakage test includes the following steps:

Step 1) placing the photovoltaic module back plate in a shallow groove containing a medium solution, the size of the shallow groove matching the size of the photovoltaic module back plate, the medium solution covering at least the photovoltaic module back plate, and the dielectric solution having a resistivity of 3500 Ω or less · cm, surface tension is less than or equal to 3N·m ^-1 , temperature 22 ° C ± 3 ° C;

Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor;

Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module;

Step 4) lowering the DC voltage to 0, short-circuiting the lead-out of the insulation resistance tester to release the voltage inside the back panel of the photovoltaic module;

Step 5) If the component wet leakage test fails and needs to be repaired, the component back plate is heated by an infrared radiant heating device or a hot air blower, and the surface temperature of the component back plate is not more than 80 ° C to remove the photovoltaic module back plate. A small amount of moisture, while using a micro-probe to check the moisture content of the component backsheet, requires no more than 1000ppm.

Further, the step 2 specifically includes the following:

Step 1) placing the back panel of the photovoltaic module to be repaired face up on the working platform, and pre-dusting the surface of the back panel of the photovoltaic module with a vacuuming device;

Step 2) performing dust removal treatment on the surface of the back panel of the photovoltaic module with a brush;

Step 3) cleaning the surface of the photovoltaic module back sheet with an organic solvent;

Step 4) Vacuuming the surface of the photovoltaic module back plate with a vacuum cleaner.

Further, the fitting of the partial patch in the third step includes the following steps:

Step 1) Quantitatively laminating and repairing according to the area of the scratch of the component back plate, and cutting out the size of the repair tape, and the distance between the outer edge of the tape and the scratched edge is greater than or equal to 5 cm;

Step 2) tear the repair tape of the cut piece, tear the release material layer, paste it into the place to be repaired, and compact it with a pressure roller.

Further, the fitting of the full patch in the third step includes the following steps:

Step 1) cutting the photovoltaic module back sheet with a high-performance repair tape into a plurality of first sheets, two second sheets, and a third sheet;

Step 2) One end of the photovoltaic module backboard is mounted with a junction box, and the first first sheet is attached to one end of the photovoltaic module backboard away from the junction box, and the first sheet is a short edge is flattened along a long side of the photovoltaic module backsheet, a long side of the first sheet being flattened along a short side of the photovoltaic module backsheet, and the release is teared from the middle of the first sheet The material layer is simultaneously bonded by a pressing roller or a squeegee, and the functional adhesive layer of the half of the first sheet is attached to the back panel of the photovoltaic module, and the functional adhesive layer and the photovoltaic module back sheet are removed. Repeating the above method to complete the bonding of the other half of the first sheet, thereby completing the bonding of the first first sheet;

Step 3) repeating step 2), sequentially laminating the remaining first sheet until it is attached to the lower edge of the junction box;

Step 4) flatten the short sides of one end of the two second sheets along the edges of the left and right sides of the junction box, and the short sides of the other end are respectively laid along the long sides of the back panel of the photovoltaic module. And tearing off the release material layer of one of the second sheets while bonding with a pressure roller or a scraper, attaching the functional adhesive layer to the photovoltaic module backing plate, and removing the functional adhesive a bubble between the layer and the back plate of the photovoltaic module; repeating the above method to complete the bonding of another of the second sheet;

Step 5) flattening the long sides of the third sheet along the upper edge of the junction box and the short side of the photovoltaic module back sheet, and tearing off the release material layer of the third sheet And attaching the functional adhesive layer to the back panel of the photovoltaic module, and bonding with a pressure roller or a scraper to adhere the functional adhesive layer to the back panel of the photovoltaic module, and removing the functional adhesive layer Air bubbles between the back panel of the photovoltaic module;

Step 6) sealing between an edge of the first sheet, the second sheet, and the third sheet and an edge of the photovoltaic module back sheet adjacent to the parallel and an edge of the junction box;

Adjacent ones of the first sheet, the second sheet, and the third sheet are laminated one on another, and the overlapping bonding width is 50 mm or more.

Further, in the step 6), the sealing is performed by a silica gel or an insulating tape.

Further, a distance between an edge of the first sheet, the second sheet, and the third sheet and an edge of the photovoltaic module back sheet adjacent to the parallel and an edge of the junction box is 1 mm or less.

Further, the step 4 specifically includes the following:

Step 1) Place the repaired PV module back plate in a shallow groove containing a medium solution. The size of the shallow groove matches the size of the PV module back plate. The medium solution covers at least the PV module back plate, and the resistivity of the medium solution. Less than or equal to 3500 Ω · cm, surface tension is less than or equal to 3N · m ^-1 , temperature 22 ° C ± 3 ° C;

Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor;

Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module;

Step 4) Lower the DC voltage to 0 and short-circuit the terminal of the insulation resistance tester to release the voltage inside the back panel of the PV module.

An application according to any of the above-mentioned repairing tape bonding processes for a photovoltaic module back sheet for on-site repair of a photovoltaic module back sheet.

Beneficial effect

The outstanding effects of the repairing tape bonding process for the photovoltaic module back sheet of the present invention are as follows:

1. The damaged PV module backboard can be repaired on site, no need to transport to the factory, saving labor and transportation costs, and avoiding the cracking of the components during transportation;

2. Partial repair or full repair of the PV module backplane can be completed in a short time, and the repairing efficiency is high;

3. The backing plate which is adhered by the bonding process of the invention can prevent reverse osmosis of rainwater, and the overlapping bonding width between the sheet materials is 50 mm or more to ensure waterproofness and insulation between the sheet materials;

4. Use the pressure roller or scraper to avoid laminating air bubbles and ensure the quality of the fit;

5. After repairing the back panel of the PV module, the repairing effect can be quickly judged by the wet leakage test, which ensures that the repair quality is controllable and the inspection is convenient.

DRAWINGS

FIG. 1 is a schematic structural view of a bonding process according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

Example

A repairing tape bonding process for a photovoltaic module back sheet of the embodiment includes the following steps:

Step 1: Perform a wet leakage test on the back panel of the PV module to check its insulation to determine that it needs to be repaired. If the component area is greater than 0.1 m ² and the measured insulation resistance value multiplied by the component area is less than 40 MΩ· m ² , then it needs to be performed. Full repair; if the component area is larger than 0.1m ² , the measured insulation resistance value multiplied by the component area is greater than or equal to 40MΩ·m ² , the component insulation test passes, but the appearance is still scratched, then partial repair is required;

Among them, the wet leakage test includes the following steps:

Step 1) placing the photovoltaic module back plate in a shallow groove containing a medium solution, the size of the shallow groove matching the size of the photovoltaic module back plate, the medium solution covering at least the photovoltaic module back plate, and the dielectric solution having a resistivity of 3500 Ω or less · cm, surface tension is less than or equal to 3N·m ^-1 , temperature 22 ° C ± 3 ° C;

Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor;

Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module;

Step 4) lowering the DC voltage to 0, short-circuiting the lead-out of the insulation resistance tester to release the voltage inside the back panel of the photovoltaic module;

Step 5) If the component wet leakage test fails and needs to be repaired, the component back plate is heated by an infrared radiant heating device or a hot air blower, and the surface temperature of the component back plate is not more than 80 ° C to remove the photovoltaic module back plate. A small amount of moisture, while using a micro-probe to check the moisture content of the component backsheet, requires no more than 1000ppm.

Step 2: Clean the back panel of the PV module to be repaired, including the following:

Step 1) placing the back panel of the photovoltaic module to be repaired face up on the working platform, and pre-dusting the surface of the back panel of the photovoltaic module with a vacuuming device;

Step 2) performing dust removal treatment on the surface of the back panel of the photovoltaic module with a brush;

Step 3) cleaning the surface of the photovoltaic module back sheet with an organic solvent;

Step 4) Vacuuming the surface of the photovoltaic module back plate with a vacuum cleaner.

Step 3: using a repairing tape of the photovoltaic module back sheet to partially repair or completely repair the cleaned PV module back sheet;

The partial patching fit includes the following steps:

Step 1) Quantitatively laminating and repairing according to the area of the scratch of the component back plate, and cutting out the size of the repair tape, and the distance between the outer edge of the tape and the scratched edge is greater than or equal to 5 cm;

Step 2) tear the repair tape of the cut piece, tear the layer of the release material, and paste it in the place to be repaired. It is compacted by a press roll.

As shown in Figure 1, the fully patched fit includes the following steps:

Step 1) cutting the photovoltaic module back sheet 7 with high performance repair tape into three first sheets 1, 2, 3, 2 second sheets 4, 5 and 1 third sheet 6;

Step 2) One end of the photovoltaic module back plate 7 is mounted with a junction box 8, and the first first sheet 1 is attached to one end of the photovoltaic module back plate 7 away from the junction box 8, and the short side 1a of the first sheet 1 is along The long side 7b of the photovoltaic module backsheet 7 is flattened, and the long side 1b of the first sheet 1 is laid flat along the short side 7a of the photovoltaic module backsheet 7, tearing away the release material layer from the middle of the first sheet 1, while Applying a pressure roller or a squeegee to adhere the functional adhesive layer of the half of the first sheet 1 to the photovoltaic module backing plate 7, and removing the air bubbles between the functional adhesive layer and the photovoltaic module backing plate, repeating the above method, and completing The other half of the first sheet 1 is bonded to complete the bonding of the first first sheet 1;

Step 3) repeat step 2), in turn, the first sheet 2, 3, until the lower edge 8a of the junction box 8 is attached;

Step 4) The short sides 4a, 5a of one end of the second sheet 4, 5 are respectively laid flat along the edges 8c, 8d of the left and right sides of the junction box 8, and the short sides 4a, 5a of the other end are respectively along the back panel of the photovoltaic module. The long side 7b is flattened, tearing off the release material layer of the second sheet 4, and simultaneously bonding with a pressure roller or a scraper to adhere the functional adhesive layer to the photovoltaic module backing plate 7, and removing the functional adhesive layer and the photovoltaic component Bubbles between the back sheets 7; repeating the above method to complete the bonding of the second sheets 5;

Step 5) Flatten the long side 6b of the third sheet 6 along the upper edge 8b of the junction box 8 and the short side 7a of the photovoltaic module backsheet 7, tearing off the release material layer of the third sheet 6, and functioning The adhesive layer is attached to the back panel 7 of the photovoltaic module, and is adhered by a pressure roller or a scraper, so that the functional adhesive layer is attached to the back panel 7 of the photovoltaic module, and the air bubbles between the functional adhesive layer and the back panel 7 of the photovoltaic module are removed;

Step 6) passing between the edges of the first sheets 1, 2, 3, the second sheets 4, 5 and the third sheet 6 and the edges of the parallel adjacent photovoltaic module back sheets 7 and the edges of the junction box 8. The silicone 9 or the insulating tape 9 is sealed; the edges of the first sheets 1, 2, 3, the second sheets 4, 5 and the third sheet 6 and the edges of the parallel adjacent photovoltaic module back sheet 7 and the junction box 8 The distance between the edges is less than or equal to 1 mm, and the adjacent first sheets 1, 2, 3, the second sheets 4, 5 and the third sheet 6 are sequentially overlapped and laminated (see the overlapping area in Fig. 1). 10), the overlap fit width is greater than or equal to 50 mm.

Step 4: Verify the repair effect, including the following:

Step 1) Place the repaired PV module back plate in a shallow groove containing a medium solution. The size of the shallow groove matches the size of the PV module back plate. The medium solution covers at least the PV module back plate, and the resistivity of the medium solution. Less than or equal to 3500 Ω · cm, surface tension is less than or equal to 3N · m ^-1 , temperature 22 ° C ± 3 ° C;

Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor;

Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module;

Step 4) Lower the DC voltage to 0 and short-circuit the terminal of the insulation resistance tester to release the voltage inside the back panel of the PV module.

The above-mentioned application of the repairing tape bonding process for the photovoltaic module back sheet is used for on-site repair of the photovoltaic module back sheet, and when only the back sheet is abnormal, it is not necessary to replace all the photovoltaic modules.

Applying the photovoltaic module of the present embodiment to an area of 1.63 m ² , using a repair tape bonding process, partially repairing or completely repairing five damaged photovoltaic module back plates 1-5, and the results of the wet leakage test before and after the repair are shown in the table. 1:

Table 1

It can be seen that the damaged backing plate is covered by the repair tape and its insulation test is passed.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims (10)

A repairing tape bonding process for a photovoltaic module backsheet, comprising the steps of: Step 1: Perform visual inspection on the back panel of the PV module, and judge whether the PV module back panel with abnormal appearance inspection results requires partial repair or full repair; Step 2: Clean the back panel of the PV module to be repaired; Step 3: using a repairing tape of the photovoltaic module back sheet to partially repair or completely repair the cleaned PV module back sheet; Step 4: Verify the repair effect. The repairing tape bonding process for a photovoltaic module back sheet according to claim 1, wherein in the first step, the photovoltaic module back sheet is subjected to a wet leakage test to detect the insulation property to determine that repair is required. If the component area is greater than 0.1m ² and the measured insulation resistance value multiplied by the component area is less than 40MΩ·m ² , full repair is required; if the component area is larger than 0.1m ² , the measured insulation resistance value is multiplied by the component area. Greater than or equal to 40 MΩ·m ² , the component insulation test passes, but the appearance is still scratched and partial repair is required. The repairing tape bonding process for a photovoltaic module back sheet according to claim 2, wherein the wet leakage test comprises the following steps: Step 1) placing the photovoltaic module back plate in a shallow groove containing a medium solution, the size of the shallow groove matching the size of the photovoltaic module back plate, the medium solution covering at least the photovoltaic module back plate, and the dielectric solution having a resistivity of 3500 Ω or less · cm, surface tension is less than or equal to 3N·m ^-1 , temperature 22 ° C ± 3 ° C; Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor; Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module; Step 4) lowering the DC voltage to 0, short-circuiting the lead-out of the insulation resistance tester to release the voltage inside the back panel of the photovoltaic module; Step 5) If the component wet leakage test fails and needs to be repaired, the component back plate is heated by an infrared radiant heating device or a hot air blower, and the surface temperature of the component back plate is not more than 80 ° C to remove the photovoltaic module back plate. A small amount of moisture, while using a micro-probe to check the moisture content of the component backsheet, requires no more than 1000ppm. A repairing tape bonding process for a photovoltaic module back sheet according to claim 1, characterized in that: Step 2 specifically includes the following: Step 1) placing the back panel of the photovoltaic module to be repaired face up on the working platform, and pre-dusting the surface of the back panel of the photovoltaic module with a vacuuming device; Step 2) performing dust removal treatment on the surface of the back panel of the photovoltaic module with a brush; Step 3) cleaning the surface of the photovoltaic module back sheet with an organic solvent; Step 4) Vacuuming the surface of the photovoltaic module back plate with a vacuum cleaner. The repairing tape bonding process for a photovoltaic module back sheet according to claim 1, wherein the fitting of the partial repair in the third step comprises the following steps: Step 1) Quantitatively laminating and repairing according to the area of the scratch of the component back plate, and cutting out the size of the repair tape, and the distance between the outer edge of the tape and the scratched edge is greater than or equal to 5 cm; Step 2) tear the repair tape of the cut piece, tear the release material layer, paste it into the place to be repaired, and compact it with a pressure roller. The repairing tape bonding process for a photovoltaic module back sheet according to claim 1, wherein the fitting of the full repair in the third step comprises the following steps: Step 1) cutting the photovoltaic module back sheet with a high-performance repair tape into a plurality of first sheets, two second sheets, and a third sheet; Step 2) One end of the photovoltaic module backboard is mounted with a junction box, and the first first sheet is attached to one end of the photovoltaic module backboard away from the junction box, and the first sheet is a short edge is flattened along a long side of the photovoltaic module backsheet, a long side of the first sheet being flattened along a short side of the photovoltaic module backsheet, and the release is teared from the middle of the first sheet The material layer is simultaneously bonded by a pressing roller or a squeegee, and the functional adhesive layer of the half of the first sheet is attached to the back panel of the photovoltaic module, and the functional adhesive layer and the photovoltaic module back sheet are removed. Repeating the above method to complete the bonding of the other half of the first sheet, thereby completing the bonding of the first first sheet; Step 3) repeating step 2), sequentially laminating the remaining first sheet until it is attached to the lower edge of the junction box; Step 4) flatten the short sides of one end of the two second sheets along the edges of the left and right sides of the junction box, and the short sides of the other end are respectively laid along the long sides of the back panel of the photovoltaic module. And tearing off the release material layer of one of the second sheets while bonding with a pressure roller or a scraper, attaching the functional adhesive layer to the photovoltaic module backing plate, and removing the functional adhesive a bubble between the layer and the back panel of the photovoltaic module; repeating the above a method of completing the bonding of another of the second sheets; Step 5) flattening the long sides of the third sheet along the upper edge of the junction box and the short side of the photovoltaic module back sheet, and tearing off the release material layer of the third sheet And attaching the functional adhesive layer to the back panel of the photovoltaic module, and bonding with a pressure roller or a scraper to adhere the functional adhesive layer to the back panel of the photovoltaic module, and removing the functional adhesive layer Air bubbles between the back panel of the photovoltaic module; Step 6) sealing between an edge of the first sheet, the second sheet, and the third sheet and an edge of the photovoltaic module back sheet adjacent to the parallel and an edge of the junction box; Adjacent ones of the first sheet, the second sheet, and the third sheet are laminated one on another, and the overlapping bonding width is 50 mm or more. The repairing tape bonding process for a photovoltaic module back sheet according to claim 6, wherein the step 6) is sealed by a silicone rubber or an insulating tape. The repairing tape bonding process for a photovoltaic module back sheet according to claim 6, wherein the edges of the first sheet, the second sheet and the third sheet are adjacent to the photovoltaics in parallel The distance between the edge of the component backboard and the edge of the junction box is less than or equal to 1 mm. The repairing tape bonding process for a photovoltaic module back sheet according to claim 1, wherein the step 4 comprises the following steps: Step 1) Place the repaired PV module back plate in a shallow groove containing a medium solution. The size of the shallow groove matches the size of the PV module back plate. The medium solution covers at least the PV module back plate, and the resistivity of the medium solution. Less than or equal to 3500 Ω · cm, surface tension is less than or equal to 3N · m ^-1 , temperature 22 ° C ± 3 ° C; Step 2) short-circuit the output end of the photovoltaic module backplane, connect to the positive pole of the insulation resistance tester, and connect the medium solution to the negative pole of the insulation resistance tester using a metal conductor; Step 3) Adjust the DC voltage of the insulation resistance tester to 1000V, and after maintaining the voltage for not less than 60s, measure the insulation resistance value of the back panel of the photovoltaic module; Step 4) Lower the DC voltage to 0 and short-circuit the terminal of the insulation resistance tester to release the voltage inside the back panel of the PV module. An application of a repair tape bonding process for a photovoltaic module back sheet according to any of claims 1-9, characterized in that it is used for on-site repair of a photovoltaic module back sheet.

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