Insulation connecting piece for isolating connecting hole and welding strip on aluminum-containing backboard

Abstract

The utility model discloses an insulating connecting piece for isolating a connecting hole and a welding strip on an aluminum-containing backboard, which belongs to the field of photovoltaic technology and comprises a cylindrical hollow insulating tube, one end of the cylindrical insulating tube is connected with a first insulating edge around the edge, and the other end of the cylindrical insulating tube is connected with a second insulating edge around the edge; the outer diameter of the second insulating edge is smaller than that of the first insulating edge; and the longitudinal section of the insulating connecting piece is I-shaped. And the partition plate is vertically connected to the middle part of the insulating tube and divides the insulating tube into a left independent space and a right independent space. The insulating connecting piece solves the problem of insulation between the connecting hole of the aluminum-containing back plate and the welding strip to a great extent, and promotes the perfection of aluminum-containing back plate products. And the longitudinal section is designed to be I-shaped, so that the insulating connecting piece can be easily clamped at the junction of the connecting piece and the junction box no matter at the delivery end of the back plate or the use end of the assembly, and is not easy to fall off, and the loss cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of connectors for photovoltaic components containing aluminum back plates, and in particular relates to an insulating connector for isolating connection holes and welding strips on an aluminum back plate. Background Art

[0002] In related technologies, due to technological iteration, the battery has changed from P-type to N-type, and the water permeability requirements are strict. Photovoltaic modules use aluminum backplanes as their backplanes. Aluminum backplanes have good sealing, low water permeability, and strong mechanical properties. However, during the application process, when the welding strip at the junction box is led out, it will contact the aluminum layer at the connection hole of the aluminum backplane, causing the insulation performance of the backplane itself to fail, causing a short circuit, and thus affecting the reliability of the photovoltaic module. However, there is no simple and easy-to-operate insulation solution design on the market that is suitable for coiled material sampling and saves manpower and material resources. Utility Model Content

[0003] Based on the above description, the utility model provides an insulating connector that isolates the connection holes and welding strips on the aluminum backboard, so as to solve the problem that when a photovoltaic module uses a low water permeability aluminum backboard, the connection holes of the aluminum backboard are easily in contact with the welding strips at the junction box, thereby causing a short circuit.

[0004] An insulating connector for insulating a connection hole and a welding strip on an aluminum back plate, comprising a cylindrical hollow insulating tube, one end of the cylindrical insulating tube is connected to a first insulating edge around the edge, and the other end is connected to a second insulating edge around the edge;

[0005] The outer diameter of the second insulating edge is smaller than the outer diameter of the first insulating edge;

[0006] The longitudinal section of the insulating connector is I-shaped.

[0007] The above technical solution can also be improved as follows.

[0008] Furthermore, the above-mentioned insulating connector for isolating the connection holes and welding strips on the aluminum back plate also includes a partition plate, which is vertically connected to the middle of the insulating tube to divide the insulating tube into two independent spaces on the left and right, so that the two welding strips can pass through without interfering with each other.

[0009] Furthermore, in the above-mentioned insulating connector for isolating the connection holes and welding strips on the aluminum-containing backplane, the inner diameter of the hollow insulating tube is the same as the inner diameter of the first insulating edge, and the inner diameter of the first insulating edge is the same as the inner diameter of the second insulating edge.

[0010] Furthermore, in the above-mentioned insulating connector for isolating the connection holes and the welding strips on the aluminum-containing back plate, a side of the first insulating edge close to the second insulating edge is coated with a layer of silicone or rubber.

[0011] Furthermore, the above-mentioned insulating connector for isolating the connection hole and the welding strip on the aluminum backplane, the inner diameter of the hollow insulating tube is 12mm, the wall thickness is 3mm, the outer diameter is 18mm, and the height is 400 microns. According to the photovoltaic module standard, since the welding strip interval is 12mm, the inner diameter of the hollow insulating tube is 12mm. The thickness of the hollow insulating tube is 3mm, which meets the IEC standard requirement that the minimum distance between the RUI material of two conductors is at least 3mm. The thickness of the aluminum backplane used in this design is between 300 microns and 400 microns, so the height of the designed hollow insulating tube is 0.4mm.

[0012] Furthermore, in the above-mentioned insulating connector for isolating the connection hole on the aluminum back plate from the welding strip, the inner diameter of the first insulating edge is 12 mm, the outer diameter is 22 mm, and the thickness is at least 300 microns. Since there is still a gap between the upper end of the hollow insulating tube and the upper surface of the connection hole of the aluminum back plate, after the welding strip is led out of the hollow insulating tube and the upper surface of the aluminum back plate, the distance is too small. If there is no insulating material to block it, the welding strip is easy to contact and conduct electricity with the aluminum back plate through air transmission. Therefore, a first insulating edge is set at the upper edge of the hollow insulating tube. The outer diameter of the first insulating edge is set to 22 mm and the thickness is set to 0.3 mm, which not only blocks the passage, but also facilitates the hanging and clamping of the insulating connector.

[0013] Furthermore, in the above-mentioned insulating connector for isolating the connection hole on the aluminum-containing back plate from the welding strip, the inner diameter of the second insulating edge is 12 mm, the outer diameter is 20 mm, and the thickness is at least 300 microns. Since there is still a gap between the lower end of the hollow insulating tube and the lower surface of the connection hole of the aluminum-containing back plate, when the welding strip is led out from the lower surface of the connection hole of the aluminum-containing back plate, the distance is too small, and there is no insulating material to block it. The welding strip is easy to contact and conduct electricity with the aluminum-containing back plate through air transmission, so the second insulating edge is set, and the outer diameter of the second insulating edge is set to 20 mm, and the thickness is set to 0.3 mm, so as to facilitate the operation of clamping the back plate.

[0014] Furthermore, in the above-mentioned insulating connector for isolating the connection holes and the welding strips on the aluminum-containing back plate, the hollow insulating tube, the first insulating edge and the second insulating edge are all made of PA66.

[0015] Furthermore, in the above-mentioned insulating connector for isolating the connection holes and the welding strips on the aluminum-containing back plate, the material of the partition plate is PA66 and the thickness is 0.3 mm.

[0016] The longitudinal section of the insulating connector is an I-shaped shape, which matches the thickness of the aluminum back plate and other dimensions, meets the IEC insulation standard distance requirements, and is resistant to high temperature and aging.

[0017] The utility model also provides an aluminum back plate, on which a connection hole is opened, and the insulating connector for isolating the connection hole on the aluminum back plate from the welding strip can be inserted into the connection hole.

[0018] The beneficial effects of adopting the technical solution of the utility model are:

[0019] 1. The insulating connector of the utility model solves the insulation problem of the connection hole and the welding strip of the aluminum backplane to a great extent, and promotes the perfection of the aluminum backplane products.

[0020] 2. The longitudinal section of the insulating connector of the utility model is an I-shaped design. Whether at the backplane shipping end or the component use end, it is easy to clamp the insulating connector at the connection with the junction box, and it is not easy to fall off, thereby reducing loss costs.

[0021] 3. The design of this utility model adopts PA66 insulating material, which is small and durable, and fully saves the cost of insulation treatment.

[0022] 4. The hollow insulating tube of the utility model is designed with a small outer diameter, so the diameter of the connection hole of the aluminum back plate used in conjunction is small, which reduces the punching area of ​​the aluminum back plate and reduces the risk of the battery cells under the aluminum back plate being visible, making it more beautiful.

[0023] 5. The thickness of the design of the utility model is finely controlled and thin, which reduces the problem of lamination cracking caused by conventional gaskets easily ejecting the aluminum backing plate.

[0024] 6. The height of the hollow insulating tube of the utility model is 400 microns, which is suitable for all backplane models on the market and has a wide range of applications.

[0025] 7. The utility model is an insulating connector with an I-shaped longitudinal section, which separates the welding strip from the aluminum back plate through the insulating connector, thereby solving the insulation problem of the aluminum back plate in a simple and efficient way. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0027] Figure 1 It is a schematic diagram of the overall structure of an insulating connector for isolating a connection hole and a welding strip on an aluminum back plate of the utility model;

[0028] Figure 2 It is a schematic diagram of the main structure of an insulating connector for isolating the connection holes and welding strips on the aluminum back plate of the utility model;

[0029] Figure 3 It is a top view structural schematic diagram of an insulating connector for isolating a connection hole and a welding strip on an aluminum back plate of the utility model;

[0030] Figure 4 Schematic diagram of the overall structure of the aluminum backplane.

[0031] In the figure, 1, first insulating edge; 2, insulating tube; 3, second insulating edge; 4, partition plate; 5, connecting hole. DETAILED DESCRIPTION

[0032] Now the present invention will be further described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0034] Technologies, methods and apparatus known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and apparatus should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] The inventors found in their research that aluminum backsheets have good sealing, low water permeability, and strong mechanical properties. However, during the application process, the solder strip at the junction box will contact the aluminum layer at the connection hole of the aluminum backsheet, causing the insulation performance of the backsheet to fail, causing a short circuit, and thus affecting the reliability of the photovoltaic module. However, there is no simple and easy-to-operate insulation solution design on the market that is suitable for coiled material sampling and saves manpower and material resources.

[0038] In view of this, the utility model provides an insulating connector that isolates the connection holes on the aluminum backboard from the welding strips, so as to solve the problem that when the photovoltaic module uses a low water permeability aluminum backboard, the connection holes of the aluminum backboard are easily in contact with the welding strips at the junction box and thus cause a short circuit.

[0039] An insulating connector for insulating a connection hole and a welding strip on an aluminum back plate, comprising a cylindrical hollow insulating tube 2, one end of the cylindrical insulating tube 2 is connected to a first insulating edge 1 around the edge, and the other end is connected to a second insulating edge 3 around the edge;

[0040] The outer diameter of the second insulating edge 3 is smaller than the outer diameter of the first insulating edge 1;

[0041] The longitudinal section of the insulating connector is I-shaped.

[0042] Furthermore, a partition plate 4 is included, which is vertically connected to the middle of the insulating tube 2 to divide the insulating tube 2 into two independent spaces on the left and right. The partition plate allows the two solder strips to be separated into two independent spaces without interfering with each other.

[0043] Furthermore, the inner diameter of the hollow insulating tube 2 is the same as the inner diameter of the first insulating edge 1 , and the inner diameter of the first insulating edge 1 is the same as the inner diameter of the second insulating edge 3 .

[0044] Furthermore, a layer of silicone or rubber is coated on one side of the first insulating edge close to the second insulating edge. The silicone or rubber has elasticity, so that the insulating connector can be clamped tightly without shaking after being inserted into the connecting hole 5.

[0045] Furthermore, the first insulating edge 1 has an inner diameter of 12 mm, an outer diameter of 22 mm, and a thickness of at least 300 microns.

[0046] Furthermore, the hollow insulating tube 2 has an inner diameter of 12 mm, a wall thickness of 3 mm, an outer diameter of 18 mm, and a height of 400 microns.

[0047] Furthermore, the second insulating edge 3 has an inner diameter of 12 mm, an outer diameter of 20 mm, and a thickness of at least 300 microns.

[0048] Furthermore, the hollow insulating tube 2, the first insulating edge 1 and the second insulating edge 3 are all made of PA66.

[0049] Furthermore, the partition plate 4 is made of PA66 and has a thickness of 0.3 mm.

[0050] Example 1

[0051] like Figure 1 As shown, the utility model is an integrated design, which is roughly divided into three design parts, namely:

[0052] Insulation tube 2 - The hollow insulation tube 2 located in the middle of the design has an inner diameter of 12 mm, an outer diameter of 18 mm, and a height of 400 microns. It should be noted that the thickness of the RUI material between the two conductors is at least 3 mm, so the thickness of the hollow insulation tube 2 is 3 mm. Since the welding strip spacing is 12 mm, the inner diameter of the hollow insulation tube 2 is at least 12 mm, and since the aluminum back plate is punched at least 18 mm, the outer diameter of the hollow insulation tube 2 is set to 18 mm.

[0053] The first insulating edge 1 is located at the upper end of the design and is connected to the upper end of the hollow insulating tube 2. Its inner diameter is 12mm, outer diameter is 22mm, and thickness is 300 microns. It should be noted that the distance between the two welding strips at the terminal end of the junction box is 12mm, so the designed inner diameter is at least 12mm. According to the 1EC standard, the thickness of the RUI material between two conductors is at least 300 microns, so the designed thickness is at least 300 microns. Considering that the thickness of the hollow insulating tube 2 is 3mm, the thickness of the first insulating edge 1 is at least 3mm, and then expanded to an outer diameter of 22mm.

[0054] The second insulating edge 3 is located at the lower end of the design and is connected to the lower end of the hollow insulating tube 2. The inner diameter is consistent with the hollow insulating tube 2, which is 12 mm, and extends outward to an outer diameter of 20 mm. Since there is still a gap between the lower end of the hollow insulating tube 2 and the lower surface of the opening of the aluminum back plate, the distance between the welding strip and the lower surface of the aluminum back plate connection hole 5 is too small. If there is no insulating material to block it, the welding strip is easy to contact and conduct electricity with the aluminum back plate through air transmission, so the second insulating edge 3 is set. The outer diameter of the second insulating edge 3 is set to 20 mm and the thickness is set to 0.3 mm, which is convenient for operating to clamp the back plate.

[0055] After the aluminum back sheet is sampled, it is cut and punched according to Figure 4 In this way, a hole is punched at a set position of the aluminum back plate, with a diameter of 18 mm, and the middle shaded part is the part where the hollow insulating tube 2 designed by the utility model is inserted. The first insulating edge 1 with an outer diameter of 22 mm is located on the outer side of the upper surface of the aluminum back plate, and the second insulating edge 3 with an outer diameter of 20 mm is located on the outer side of the lower surface of the aluminum back plate. Since the insulating connector is thin and elastic, when in use, the insulating connector can be inserted into the hole of the back plate.

[0056] Then, the aluminum backplane, adhesive film, battery cell, adhesive film, and glass are stacked in order and put into the laminator for lamination. The temperature is set to 150°C and the time is set to 15 minutes. After lamination, the backplane items are tested normally. It can be observed that the insulating connector has not shifted in the laminator due to the hole being stuck. From the appearance, there is no light transmission phenomenon.

[0057] The laminated samples were installed in the junction box in the normal process, and the edges were sealed and cured. After the components were formed into finished products, the components were tested for wet leakage and insulation, and the test results were all qualified, indicating that this new application design meets the design purpose, that is, the insulating connector is a product that can solve the insulation problem of the aluminum foil and the solder strip contact at the hole of the aluminum backplane.

[0058] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An insulating connector for isolating a connection hole and a welding strip on an aluminum back plate, characterized in that: It comprises a cylindrical hollow insulating tube, one end of which is connected to a first insulating edge around the edge, and the other end of which is connected to a second insulating edge around the edge; The outer diameter of the second insulating edge is smaller than the outer diameter of the first insulating edge; The longitudinal section of the insulating connector is I-shaped.

2. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: It also includes a partition plate, which is vertically connected to the middle of the insulation tube to divide the insulation tube into two independent spaces on the left and right.

3. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: The inner diameter of the hollow insulating tube is the same as the inner diameter of the first insulating edge, and the inner diameter of the first insulating edge is the same as the inner diameter of the second insulating edge.

4. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: A layer of silica gel or rubber is coated on one side of the first insulating edge close to the second insulating edge.

5. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: The first insulating edge has an inner diameter of 12 mm, an outer diameter of 22 mm, and a thickness of at least 300 microns.

6. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: The hollow insulating tube has an inner diameter of 12 mm, a wall thickness of 3 mm, an outer diameter of 18 mm, and a height of 400 microns.

7. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: The second insulating edge has an inner diameter of 12 mm, an outer diameter of 20 mm, and a thickness of at least 300 microns.

8. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 1, characterized in that: The hollow insulating tube, the first insulating edge and the second insulating edge are all made of PA66.

9. The insulating connector for isolating the connection holes and the welding strips on the aluminum back plate according to claim 2, characterized in that: The partition plate is made of PA66 and has a thickness of 0.3 mm.

10. An aluminum-containing back sheet, characterized in that: A connecting hole is formed thereon, and the insulating connecting piece for isolating the connecting hole and the welding strip on the aluminum-containing back plate as claimed in any one of claims 1 to 9 can be inserted into the connecting hole.

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