Pressing needle assembly suitable for photovoltaic assembly EL test

Abstract

The utility model discloses a pressing needle assembly suitable for photovoltaic assembly EL test, which comprises pressing needles, springs, a limit cap and a base, the base is provided with a plurality of pressing needle holes, the pressing needle holes are divided into a left pressing needle group and a right pressing needle group, each pressing needle hole is internally provided with one pressing needle, so that a left pressing needle group and a right pressing needle group are formed, each pressing needle is sleeved in the spring, and the limiting cap is arranged on the left pressing needle group and the right pressing needle group. The two ends of the spring abut against the base and the bottoms of the pressing needles respectively, after the pressing needles penetrate through the pressing needle holes from bottom to top, the top of each pressing needle is fixed through the limiting cap so as to prevent the pressing needles from falling off from the pressing needle holes, the pressing needles in each pressing needle set are connected through wires, the wires in one pressing needle set are positive wires, and the wires in the other pressing needle set are negative wires. And the lead in the other pressing needle group is a negative lead which respectively corresponds to the positive electrode and the negative electrode of the external power supply. According to the utility model, the problem of'black pattern 'in EL test of the laminated photovoltaic module can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of photovoltaic module EL test, especially a needle assembly suitable for photovoltaic module EL test. BACKGROUND

[0002] The photovoltaic module inevitably produces some defective products in the production process, and in order to ensure the qualified rate of the module and the abnormal troubleshooting efficiency, the EL tester needs to be installed after lamination to detect the defects such as hidden cracks, short circuits, black pieces and broken pieces of the module.

[0003] The busbar lead-out wire of the photovoltaic module will pass out from the backboard opening position, and then the busbar lead-out wire is bent to be parallel to the glass surface. The EVA adhesive film will overflow from the backboard opening position after high-temperature melting during lamination. At this time, a part of the busbar lead-out wire will be attached to the melted EVA adhesive. At this time, the melted adhesive film is higher than the busbar lead-out wire. The conventional EL test needle will be pressed on the EVA adhesive (as shown in Figure 4 , in which 15 is the busbar lead-out wire, 16 is the conventional needle, and 17 is the EVA adhesive). The EVA adhesive is an insulating material, which will cause the EL test to be "black picture". At this time, it is necessary to clean the EVA adhesive on the busbar lead-out wire manually and then retest, which seriously affects the production rhythm. When cleaning the excess EVA adhesive, an art knife is used. The backboard will be scratched and the module will be degraded during the cleaning process. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a needle assembly suitable for photovoltaic module EL test, which can effectively solve the "black picture" problem of photovoltaic module EL test after lamination.

[0005] To achieve the above-mentioned purpose, the utility model provides a needle assembly suitable for photovoltaic module EL test, which comprises a needle, a spring, a limiting cap and a base. The base is provided with a plurality of needle holes. These needle holes are divided into left and right groups. Each needle hole is provided with a needle, thereby forming left and right needle groups. Each needle is sleeved with a spring. The two ends of the spring are in contact with the bottom of the needle and the base. After the needle passes through the needle hole from bottom to top, the top of each needle is fixed with a limiting cap to prevent the needle from falling off the needle hole. Each needle in each needle group is connected by a wire. The wire in one needle group is a positive wire, and the wire in the other needle group is a negative wire, which correspond to the positive and negative poles of the external power supply, respectively.

[0006] Preferably, the driving mechanism for controlling the base down and up, the driving mechanism includes a cylinder, stud bolts and mounting frame, the left and right ends of the base are provided with a through hole for installing stud bolts, the stud bolts are two and are respectively inserted into the two through holes, the mounting frame is located above the base, and they are connected through the two stud bolts, one end of the stud bolts penetrates the mounting frame upward, the other end penetrates the base downward, the two ends of the stud bolts are fixed through nuts, and the cylinder is located above the mounting frame, and the piston rod of the cylinder is vertically connected to the mounting frame downward.

[0007] Preferably, the two needle groups are located between the two through holes.

[0008] Preferably, the stud bolts are connected in series through wires.

[0009] Preferably, the number of the stud bolts in the two needle groups is same.

[0010] Preferably, the stud bolt is composed of two different size cylinders.

[0011] Preferably, the cylinder is a cylinder, a triangular column or a cuboid.

[0012] Preferably, the stud bolt is a copper stud bolt or a copper alloy stud bolt.

[0013] Preferably, the base is an insulating base.

[0014] Preferably, the mounting frame is an insulating mounting frame.

[0015] Compared with the prior art, the utility model has the advantages and beneficial effects that:

[0016] The two needle groups are composed of a plurality of stud bolts, and they can be pressed down individually; in the test process, part of the stud bolts are pressed on the EVA glue, and the other part of the stud bolts are pressed on the busbar lead-out wire, so that normal EL test can be carried out, the "black picture" situation does not occur, there is no production bottleneck, and the backboard is not scratched when the excess EVA is cleaned by using a craft knife. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is one of the structure schematic views of the needle assembly provided by the embodiment.

[0018] Figure 2 It is the second structure schematic view of the needle assembly provided by the embodiment.

[0019] Figure 3 It is the working schematic view of the needle assembly provided by the embodiment.

[0020] Figure 4 It is the working schematic view of the conventional needle. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0022] like Figures 1 to 3 As shown, this embodiment discloses a pressure pin assembly suitable for EL testing of photovoltaic modules, including a pressure pin 110, a spring 115, a limiting cap 116, and a base 117. The base 117 is provided with a plurality of pressure pin holes 114, which are evenly divided into left and right groups. Each pressure pin hole 114 contains a pressure pin 110, thus forming two pressure pin groups. Each pressure pin 110 is fitted into a spring 115, and the two ends of the spring 115 abut against the base 117 and the bottom of the pressure pin 110, respectively. After the pressure pin 110 is passed through the pressure pin hole 114 from bottom to top, the top of each pressure pin 110 is fixed with a limiting cap 116 to prevent the pressure pin 110 from falling out of the pressure pin hole 114. The pressure pins 110 in each pressure pin group are connected in series by wires. The wires in one pressure pin group are positive wires 111, and the wires in the other pressure pin group are negative wires 112, corresponding to the positive and negative terminals of the external power supply, respectively.

[0023] Preferably, the system further includes a drive mechanism for controlling the downward and upward movement of the base 117. The drive mechanism includes a cylinder 10, a double-ended stud 13, and a mounting bracket 14. Each of the left and right ends of the base 117 has a through hole 113 for mounting the double-ended stud 13. There are two double-ended studs 13, which are respectively inserted into the two through holes 113. The mounting bracket 14 is located above the base 117 and is connected to it by the two double-ended studs 13. One end of the double-ended stud 13 passes upward through the mounting bracket 14, and the other end passes downward through the base 117. The two ends of the double-ended stud 13 are fixed with nuts 12. The cylinder 10 is located above the mounting bracket 14, and its piston rod 11 is vertically connected downward to the mounting bracket 14.

[0024] Preferably, the two pressure pin groups are located between the two through holes 113; the pressure pin 110 is composed of two columns of different sizes, which are machined by turning; the columns can be cylindrical, triangular, cuboid, etc.; the material of the pressure pin 110 is conductive material such as copper or copper alloy; the material of the base 117 and the mounting bracket 14 is insulating material such as plastic or resin.

[0025] The working process of the pressure pin assembly used for EL testing of photovoltaic modules described above is as follows:

[0026] 1) Place the busbar lead 15 of the photovoltaic module under test directly below the pressure pin 110, and connect the positive lead 111 and the negative lead 112 to the positive and negative terminals of the external power supply, respectively.

[0027] 2) Start the air cylinder 10, control the piston rod 11 to move down, then drive the mounting frame 14 to press down, the indirect compression needle group starts to press down, that is, the compression needle 110 moves down until the part of the spring 115 of the compression needle 110 which contacts the EVA glue is compressed, the compression needle 110 moves up; while the other part of the compression needle 110 continues to move down until it contacts the lowest point of the busbar lead-out wire 15, then the air cylinder 10 stops.

[0028] 3) Turn on the circuit connected with the busbar lead-out wire 15, the compression needle 110 and the power supply of the photovoltaic module to be tested, and start testing the photovoltaic module.

[0029] 4) After the test is completed, the power supply is turned off, the air cylinder 10 is started, the piston rod is controlled to move up, and the compression needle 110 is indirectly controlled to move, at this time the spring 115 starts to recover to its original state (i.e. reset) without being affected by external force, and at the same time the compression needle 110 also starts to reset.

[0030] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A press pin assembly suitable for EL testing of photovoltaic modules, characterized in that, It comprises pressing needle (110), spring (115), limit cap (116) and base (117), the base (117) is provided with several pressing needle holes (114), these pressing needle holes (114) are divided into left and right two groups, each pressing needle hole (114) is installed with a pressing needle (110), thereby forming left and right two pressing needle groups, each pressing needle (110) is sleeved into spring (115), both ends of spring (115) are respectively abutted on base (117) and the bottom of pressing needle (110), after each pressing needle (110) passes through pressing needle hole (114) from bottom to top, the top of each pressing needle (110) is fixed with limit cap (116), to prevent the pressing needle (110) from falling off from pressing needle hole (114), each pressing needle (110) in each pressing needle group is connected through wire, the wire in one pressing needle group is positive wire (111), the wire in the other pressing needle group is negative wire (112), corresponding to the positive and negative poles of external power supply respectively.

2. The pressing needle assembly suitable for EL testing of photovoltaic modules according to claim 1, characterized in that, It also comprises driving mechanism for controlling the depression and rise of base (117), the driving mechanism comprises air cylinder (10), double-headed stud (13) and mounting bracket (14), the left and right ends of base (117) are each provided with a through hole (113) for installing double-headed stud (13), double-headed stud (13) has two and is respectively inserted into two through holes (113), mounting bracket (14) is located above base (117), they are connected through the above two double-headed studs (13), one end of double-headed stud (13) passes through mounting bracket (14) upward, the other end passes through base (117) downward, the two ends of double-headed stud (13) are fixed with nut (12), air cylinder (10) is located above mounting bracket (14), the piston rod (11) of air cylinder (10) is vertically connected downward to mounting bracket (14).

3. The compression pin assembly for EL testing of photovoltaic modules according to claim 2, wherein, Two pressing needle groups are located between two through holes (113).

4. The compression pin assembly for EL testing of photovoltaic modules of claim 1, wherein, Each pressing needle (110) in each pressing needle group is connected through wire in series.

5. The compression pin assembly for EL testing of photovoltaic modules of claim 1, wherein, The number of pressing needles (110) in two pressing needle groups is same.

6. The compression pin assembly for EL testing of photovoltaic modules of claim 1, wherein, The pressing needle (110) is composed of two different size cylinders.

7. The compression pin assembly for EL testing of photovoltaic modules according to claim 6, wherein, The cylinder is cylindrical, triangular or cuboid.

8. The compression pin assembly for EL testing of photovoltaic modules of claim 1, wherein, The pressing needle (110) is copper needle or copper alloy needle.

9. The compression pin assembly for EL testing of photovoltaic modules of claim 1, wherein, The base (117) is insulating base.

10. The compression pin assembly for EL testing of photovoltaic modules of claim 2, wherein, The mounting bracket (14) is insulating mounting bracket.

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