Device for detecting insulating property of light guide film of photovoltaic module

Abstract

The utility model discloses a photovoltaic module light guide film insulating property detection device, which comprises a light guide film laminated piece and a resistance detector, the light guide film laminated piece sequentially comprises a light-transmitting element, an adhesive film, a solder strip, an adhesive film, a light guide film and a photovoltaic back plate or protective glass, and the layers are laminated to form the light guide film laminated piece; the resistance detector is connected between different welding strips in the light guide film laminated part or between the welding strips and the non-insulating position of the light guide film; the welding strip is in a twisted state. The light guide film screening device not only can screen out conventional light guide films, but also can screen out whether the insulating films meet the insulating requirement or not, and the unqualified insulating films do not have the insulating effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to an insulation detection device, especially to a photovoltaic module light guide film insulation performance detection device. BACKGROUND

[0002] At present, in order to reduce cost and increase efficiency, more and more light guide films are used in photovoltaic modules. However, during use of the light guide film, current disorder occurs after lamination of the module due to deflection of the solder strip, tin slag and tin nails during soldering and stringing, or abnormal sharp protrusions such as burrs on the cell, which leads to power attenuation of the module, and in severe cases, the power of the module does not increase but decreases. At present, more and more light guide films are insulated to solve the above problems, but there is no effective detection method to evaluate the insulation effect of the light guide film. SUMMARY

[0003] The utility model aims at providing a photovoltaic module light guide film insulation performance detection device which can effectively detect the insulation effect of the light guide film.

[0004] Technical scheme: The photovoltaic module light guide film insulation performance detection device comprises a light guide film laminated part and a resistance detector, the light guide film laminated part comprises, in sequence, a light-transmitting element, a first adhesive film, a solder strip, a second adhesive film, a light guide film, and a photovoltaic backboard or protective glass, and each layer is laminated to obtain the light guide film laminated part; the resistance detector is connected between different solder strips in the light guide film laminated part or between the solder strip and a non-insulation position of the light guide film; and the solder strip is in a twisted state.

[0005] The width of the solder strip is 0.1-0.6 mm, and the thickness is 0.05-0.3 mm.

[0006] The tin nails are arranged on the solder strip at intervals, the height of the tin nails is 0.1-1 mm, and the distance between the tin nails is 5-20 mm. If the tin nails are too thick, the insulation film will be conducted, and the test will fail. If the height of the tin nails is too small, it means that unqualified insulation films cannot be filtered out.

[0007] The thickness of the first adhesive film and the second adhesive film is 300-420 g / m 2 .

[0008] The light guide film is an insulation light guide film. The insulation light guide film of the utility model can be provided with an insulation layer on the surface of a non-insulation light guide film.

[0009] The cell is arranged between the solder strip and the light guide film.

[0010] The point distance of the solder strip distortion is controlled as 5-20 mm. Too small point distance means too many solder strip points in the same length, and the insulation film is easy to be conducted, and the test fails. Too large point distance means too few solder strip points in the same length, and the unqualified insulation film cannot be filtered out.

[0011] Beneficial effects: Compared with the prior art, the utility model discloses the following remarkable effects:

[0012] (1) the solder strip is twisted, and the conventional light guide film and the unqualified insulation film without insulation effect can be screened out, and whether the insulation film meets the insulation requirement can be screened out. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the device structure schematic view of the utility model;

[0014] Figure 2 It is the internal structure schematic view of the light guide film laminated part of the utility model;

[0015] Figure 3 It is the overhead structure schematic view of the utility model;

[0016] Figure 4 It is the overhead structure schematic view of the utility model without adding the battery piece. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model will be further explained in connection with the drawings of the specification.

[0018] As shown in the drawings, Figures 1-4 The utility model discloses a photovoltaic module light guide film insulation performance detection device, including light guide film laminated part 1 and resistance detector 2, light guide film laminated part 1 includes light transmission element 11, first adhesive film 12-1, solder strip 13, second adhesive film 12-2, light guide film 14, photovoltaic backboard or protective glass 15 in proper order, and each layer is made into light guide film laminated part 1 by laminating. The front of light guide film 14 faces the side of solder strip 13; resistance detector 2 is connected between different solder strips 13 in light guide film laminated part 1 or between solder strip 13 and the non-insulation position of light guide film 14; solder strip 13 is in the twisted state.

[0019] When resistance detector 2 is connected between different solder strips 13 in light guide film laminated part 1, only the two solder strips 13 connected can be conducted, and then the test can be carried out; when resistance detector 2 is connected between solder strip 13 and the non-insulation position of light guide film 14 in light guide film laminated part 1, as long as any point on solder strip 13 is conducted, the test can be carried out, and compared with the previous connection mode of resistance detector 2, it is more accurate.

[0020] The battery piece 16 is arranged between the solder strip 13 and the light guide film 14; the light transmission element 11, the first adhesive film 12-1, the solder strip 13, the second adhesive film 12-2, the light guide film 14, the battery piece 16 and the photovoltaic back plate are laminated in sequence.

[0021] The width of the solder strip 13 is 0.1-0.6mm, and the thickness is 0.05-0.3mm; the solder strip 13 is provided with tin nails 13-1 at intervals; the height of the tin nail 13-1 is 0.1-1mm; and the interval between the tin nails 13-1 is 5-20mm.

[0022] The thickness of the first adhesive film 12-1 and the second adhesive film 12-2 is 300-420g / m 2 The light guide film 14 is an insulating light guide film; and the resistance detector 2 is a multimeter.

[0023] When a conventional light guide film is used, for example, a non-insulating light guide film is used, and when the used solder strip is laid flat, the detection result is no conduction; when the used solder strip is in a twisted state, the detection result is conduction. When the detection result is in a conduction state, it indicates that the solder strip tin nail pierces the second adhesive film 12-2 during lamination and contacts the metal reflective layer of the non-insulating light guide film, resulting in electrical conduction. However, when a conventional flat solder strip is used under the same conditions, it shows no conduction, indicating that the detection result of the solder strip in a twisted state is more reliable.

[0024] When the insulating light guide film 14 is used, even if the solder strip is in a twisted state, the detection result still shows that it is in a non-conduction state. The insulating light guide film 14 used in the embodiment is provided with an insulating layer 14-1 on the surface of the conventional non-insulating light guide film. The detection result of this case indicates that the tin nail on the solder strip cannot contact the metal layer during lamination even if it pierces the second adhesive film 12-2 because of the protection of the insulating layer 14-1, so it is not electrically conductive. Therefore, when the insulating light guide film is used, the risk of short circuit can be prevented.

Claims

1. A device for detecting insulation performance of a light guide film of a photovoltaic module, characterized by, The application relates to a light guide film laminated piece (1) and a resistance detector (2), wherein the light guide film laminated piece (1) sequentially comprises a light-transmitting element (11), a first adhesive film (12-1), a solder strip (13), a second adhesive film (12-2), a light guide film (14) and a photovoltaic backboard or protective glass (15), each layer is laminated to obtain the light guide film laminated piece (1); the resistance detector (2) is connected between different solder strips (13) in the light guide film laminated piece (1) or between the solder strip (13) and a non-insulation position of the light guide film (14); and the solder strip is in a twisted state.

2. The photovoltaic module light guide film insulation performance detection device according to claim 1, characterized in that, The width of the solder strip (13) is 0.1-0.6 mm, and the thickness is 0.05-0.3 mm.

3. The photovoltaic module light guide film insulation performance detection device of claim 1, wherein, Tin nails (13-1) are arranged on the solder strip (13) at intervals.

4. The photovoltaic module light guide film insulation performance detection device of claim 3, wherein, The height of the tin nail (13-1) is 0.1-1 mm.

5. The photovoltaic module light guide film insulation performance detection device of claim 3, wherein, The interval between the tin nails (13-1) is 5-20 mm.

6. The photovoltaic module light guide film insulation performance detection device of claim 1, wherein, The thickness of the first adhesive film (12-1) and the second adhesive film (12-2) is 300-420 g / m 2 .

7. The photovoltaic module light guide film insulation performance detection device of claim 1, wherein, The light guide film (14) is an insulating light guide film.

8. The photovoltaic module light guide film insulation performance detection device of claim 1, wherein, A battery piece (16) is arranged between the solder strip (13) and the light guide film (14).

Images