A kind of insulation withstand voltage test tool

Abstract

The invention relates to the field of photovoltaic technology, and in particular to an insulation withstand voltage test tool, comprising a flexible insulating plate pressed on a photovoltaic module during testing, wherein the surface of the flexible insulating plate close to the photovoltaic module is the back surface, and the surface of the flexible insulating plate away from the photovoltaic module is the front surface, a veneer metal foil is affixed to the back surface of the flexible insulating plate, and edge metal foils extend from the edges of the front and back surfaces of the flexible insulating plate, and the edge metal foils of the front and back surfaces extend from the flexible insulating plate and are tightly attached together to form a metal foil layer, the metal foil layer is folded and wrapped around the edge of the photovoltaic module, and the metal foil is pasted on the flexible insulating plate to sample the metal foil wrapping the back surface of the photovoltaic module and its surroundings, thereby increasing the reuse rate of the metal foil.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaics, and in particular to an insulation withstand voltage test tool. Background Art

[0002] The function of photovoltaic modules is to convert solar energy into electrical energy, and store and utilize the converted electrical energy through the photovoltaic system. Therefore, in the entire solar photovoltaic system, photovoltaic modules are the most basic and core part, and photovoltaic modules need to undergo a series of testing processes before they can enter the photovoltaic system.

[0003] The insulation withstand voltage test is an important test station in the photovoltaic module test sequence. It detects whether the insulation performance between the current-carrying components inside the photovoltaic module and the module frame is good, which is related to the safe use of the module.

[0004] In the existing photovoltaic module insulation withstand voltage test, the module electrodes are short-circuited and connected to the power supply, and the frame is connected to the return line. The frameless module requires a simulated frame to be added to the module. Currently, most simulated frames are wrapped around the module and the back with metal foil, which has a low reuse rate and high testing cost. Summary of the invention

[0005] In order to solve the problem of low reuse rate of metal foil in insulation withstand voltage test in the prior art, the present invention provides an insulation withstand voltage test tool for increasing the reuse rate of metal foil.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An insulation withstand voltage test tool comprises a flexible insulation board which is pressed on a photovoltaic module during testing, wherein the surface of the flexible insulation board close to the photovoltaic module is the back surface, and the surface of the flexible insulation board away from the photovoltaic module is the front surface, a veneer metal foil is affixed to the back surface of the flexible insulation board, and edge metal foils extend from the edges of the front and back surfaces of the flexible insulation board, and the edge metal foils of the front and back surfaces extend from the flexible insulation board and are tightly attached together to form a metal foil layer, which is folded and wrapped around the edge of the photovoltaic module.

[0008] Furthermore, the edge metal foil on the front side of the flexible insulating board is pasted on the veneer metal foil, and the edge metal foil on the back side of the flexible insulating board is pasted on the flexible insulating board.

[0009] Furthermore, the size of the flexible insulation board is greater than or equal to the size of the photovoltaic module.

[0010] Furthermore, the test fixture also includes a clamping mechanism for ensuring that the metal foil layer is in close contact with the edge of the photovoltaic module.

[0011] Furthermore, the clamping mechanism is a clamping claw, which is clamped on the metal foil layer wrapped around the outside of the edge of the photovoltaic module.

[0012] Furthermore, a pressing plate for pressing the flexible insulating plate and the photovoltaic module is provided above the flexible insulating plate.

[0013] Furthermore, the front side of the flexible insulating board is covered with a transparent tape layer, the transparent tape layer is located above the edge metal foil, and the transparent tape layer avoids the loop end interface of the edge metal foil.

[0014] Furthermore, the veneer metal foil and the edge metal foil are both copper foil.

[0015] Furthermore, the flexible insulating board is a plastic board.

[0016] Furthermore, the flexible insulating board material is PET, TPT or TPE.

[0017] Beneficial effects:

[0018] (1) Cover the flexible insulating board with metal foil, sample the metal foil wrapped around the back of the photovoltaic module and its surroundings, and increase the reuse rate of the metal foil:

[0019] (2) There is no need to wrap a new metal foil every time a test is performed. Instead, the sampled flexible insulation board and the metal foil assembly only need to be matched with the photovoltaic module, which makes the test convenient and fast, and increases the test speed;

[0020] (3) The metal foil is integrated on the flexible insulating board and will not remain on the photovoltaic module, thus keeping the photovoltaic module clean;

[0021] (4) The test position can be adjusted according to different junction boxes, and the operation is flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a front structural schematic diagram of the insulation testing tool of the present invention;

[0024] Figure 2 It is a schematic diagram of the back structure of the insulation testing tool of the present invention.

[0025] Among them, 1. flexible insulation board, 2. veneer metal foil, 3. edge metal foil. DETAILED DESCRIPTION

[0026] like Figures 1-2, an insulation withstand voltage test tool, including a flexible insulating board 1 pressed on a photovoltaic module during testing, the surface of the flexible insulating board 1 close to the photovoltaic module is the back side, the surface of the flexible insulating board 1 away from the photovoltaic module is the front side, a veneer metal foil 2 is affixed to the back side of the flexible insulating board 1, and edge metal foil 3 extends from the edges of the front and back sides of the flexible insulating board 1, and the edge metal foil 3 on the front and back sides extends from the flexible insulating board 1 and is tightly attached together to form a metal foil layer, which is folded and wrapped around the edge of the photovoltaic module.

[0027] The edge metal foil 3 on the front side of the flexible insulating board 1 can be provided integrally with the facing metal foil 2 or separately, and the edge metal foil 3 on the back side of the flexible insulating board 1 is adhered to the flexible insulating board 1 .

[0028] The size of the flexible insulating board 1 is greater than or equal to the size of the photovoltaic module.

[0029] The test fixture also includes a clamping mechanism for ensuring that the metal foil layer is in close contact with the edge of the photovoltaic module.

[0030] The clamping mechanism is a clamping jaw, which clamps on the metal foil layer wrapped around the outside of the edge of the photovoltaic module.

[0031] A pressing plate for pressing the flexible insulating plate 1 and the photovoltaic module is provided above the flexible insulating plate 1. The pressing plate can be a wooden board or the like.

[0032] The front side of the flexible insulating board 1 is covered with a transparent tape layer, which is located above the edge metal foil 3 and avoids the loop end interface of the edge metal foil 3. The transparent tape is used to protect the edge metal foil 3.

[0033] The facing metal foil 2 and the edge metal foil 3 are both copper foils.

[0034] The flexible insulating board 1 is a plastic board.

[0035] The material of the flexible insulating plate 1 is PET, TPT or TPE.

[0036] Specific operation and verification:

[0037] First, cut a flexible insulating board 1 of the same size as the component, and cover one side of it with copper foil.

[0038] Copper foil is pasted on the edges of both sides of the flexible insulating board 1, and part of the copper foil is extended from both sides to form a foldable copper foil layer. In order to protect the copper foil, a layer of transparent tape is pasted on the copper foil on the front of the flexible insulating board 1, leaving the loop end interface. During the test, the junction box of the photovoltaic module faces upward, the tooling covers the back of the photovoltaic module, and a wooden board is used to press the copper foil tightly. The edge of the tooling is clamped with a clamp to wrap the copper foil around the module.

[0039] The five components tested in different packaging methods are as follows:

[0040] (1) Prepare five double-glass modules with a size of 1662*990mm;

[0041] (2) Test the insulation withstand voltage values ​​of five components using tooling;

[0042] (3) Wrap the back and sides of the photovoltaic modules according to the standard and test the insulation withstand voltage values ​​of five modules;

[0043] (4) Record the test data, test time and copper foil usage.

[0044]

[0045] From the test data, we know that the data measured by the wrapping test using this tooling is very close to that measured by the standard wrapping test, and the numerical difference is not large, but the time for wrapping photovoltaic modules is reduced, and the amount of copper foil consumed in the test is also greatly reduced, and there is no need to clean the copper foil affixed to the module, which reflects the time-saving and material-saving, convenient and fast function of this tooling.

[0046] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. An insulation withstand voltage test tool, characterized in that : It comprises a flexible insulating plate (1) pressed on the photovoltaic module during testing, the surface of the flexible insulating plate (1) close to the photovoltaic module is the back side, the surface of the flexible insulating plate (1) away from the photovoltaic module is the front side, the back side of the flexible insulating plate (1) is affixed with a veneer metal foil (2), the edges of the front and back sides of the flexible insulating plate (1) also extend edge metal foils (3), and the edge metal foils (3) on the front and back sides extend from the flexible insulating plate (1) and are tightly attached together to form a metal foil layer, which is folded and wrapped around the edge of the photovoltaic module; the size of the flexible insulating plate (1) is greater than or equal to the size of the photovoltaic module; the test tool also includes a device for ensuring that the metal foil layer is in contact with the photovoltaic module. A clamping mechanism for tightly attaching the edge of a photovoltaic module; the clamping mechanism is a clamping claw, which is clamped on a metal foil layer wrapped around the outside of the edge of the photovoltaic module; a pressing plate for pressing the flexible insulating board (1) and the photovoltaic module is provided above the flexible insulating board (1); the front of the flexible insulating board (1) is covered with a transparent tape layer, the transparent tape layer is located above the edge metal foil (3), and the transparent tape layer avoids the loop end interface of the edge metal foil (3); the veneer metal foil (2) and the edge metal foil (3) are both copper foil; the flexible insulating board (1) is a plastic board; the material of the flexible insulating board (1) is PET, TPT or TPE.

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