Male head needle core of solar cell module test tool

Abstract

A male head needle core of a solar cell module test tool belongs to the field of solar cell test device modules, and comprises a needle core main body, a crown spring and a tail tube, the needle core main body is hollow; the cable is characterized by further comprising a copper sleeve and an insulating sleeve, the crown spring is arranged in a groove in the front end of the copper sleeve; by improving a male head needle core of an existing solar cell module testing tool, a copper sleeve is additionally arranged in a needle core body, a crown spring is arranged at the front end of the copper sleeve, meanwhile, the copper sleeve, an insulation sleeve and a tail pipe are provided with limiting faces and limiting grooves, and the tail pipe and the needle core body are welded, so that stable arrangement of the copper sleeve is achieved; the test line and the copper sleeve are welded to realize transmission of a test signal, direct connection between the test line and the crown spring is avoided, the problem of welding spot falling caused by stress generated between the MC4 head and a welding spot of the test line due to rotation of the crown spring in the plugging process of the MC4 head and a male head needle core of a test tool is further avoided, and the beneficial effect of prolonging the service life of the male head needle core is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of solar cell test device components, in particular to a male connector needle core of a solar cell component test tool. Background Art

[0002] At present, when conducting IV, insulation voltage, EL and other testing links, the male connector pin core used in the solar cell module testing tooling has the test wire welded to the crown spring in the male connector pin core. When used for solar cell module testing, the crown spring will rotate to a certain extent during the plugging and unplugging process with the MC4 head of the solar cell module. After multiple plugging and unplugging, the solder joints of the crown spring and the test wire will produce fatigue stress, and then the welding wire of the male connector pin core will become loose and fall off, affecting the life of the male connector pin core. Summary of the Invention

[0003] The utility model aims to solve the above problems and provides a male connector needle core structure of a solar cell component testing tool.

[0004] The male connector of the solar cell module testing tool of the utility model comprises a connector body, a crown spring and a tail pipe; the connector body is hollow; and further comprises a copper sleeve and an insulating sleeve;

[0005] The crown spring, copper sleeve and tail pipe are sequentially arranged in the hollow cavity of the needle core body;

[0006] The crown spring is arranged in the front end groove of the copper sleeve;

[0007] The insulating sleeve is arranged on the copper sleeve; the insulation setting between the copper sleeve and the needle core body is achieved by arranging the insulating sleeve;

[0008] The insulating sleeve and the tail pipe are both provided with a through hole for passing the test line;

[0009] A copper sleeve limiting surface is provided on the outer wall of the tail end of the copper sleeve; a matching insulating sleeve inner wall limiting surface is provided on the inner wall of the insulating sleeve at a position corresponding to the aforementioned copper sleeve limiting surface;

[0010] An insulating sleeve outer wall limiting surface is provided on the outer wall of the rear end of the insulating sleeve;

[0011] The inner wall of the tail pipe is provided with a limiting groove corresponding to the limiting surface of the outer wall of the insulating sleeve.

[0012] During testing, the crown spring contacts the MC4 connector, and the front end of the test lead is welded to the rear end of the copper sleeve through a through-hole. Test data from the solar panel passes through the crown spring, the copper sleeve, and then the test lead to the test equipment for analysis and processing. During multiple tests, the crown spring rotates slightly due to insertion and removal, transmitting rotational force to the copper sleeve. The copper sleeve, acting on the stop surface, transfers this force to the tail pipe. Because the tail pipe is securely connected to the male connector via welding, this rotational force is offset, ensuring a secure connection between the test lead and the copper sleeve, and extending the life of the male connector.

[0013] Furthermore, the male pin of the solar cell module test fixture of the present invention includes an insulating sleeve comprising a first insulating sleeve and a second insulating sleeve; this facilitates installation of the copper sleeve in the middle of the insulating sleeve while ensuring insulation between the copper sleeve and the pin body;

[0014] The first insulating sleeve and the second insulating sleeve are sequentially sleeved on the copper sleeve;

[0015] A matching insulating sleeve inner wall limiting surface is provided at a position on the inner wall of the second insulating sleeve corresponding to the aforementioned copper sleeve limiting surface;

[0016] An insulating sleeve outer wall limiting surface is provided on the outer wall of the tail end of the second insulating sleeve.

[0017] Furthermore, the male connector of the solar cell module test fixture of the present invention has a coil spring disposed at the front end of the hollow cavity of the connector body; the coil spring is located at the front end of the aforementioned crown spring. The coil spring not only clamps the MC4 plug but also ensures electrical connection between the MC4 plug and the connector body.

[0018] Furthermore, the male pin core of the solar cell module testing tool of the present invention has two coil springs arranged in parallel.

[0019] The male connector of the solar cell module test fixture described in the utility model is improved on the existing male connector of the solar cell module test fixture, a copper sleeve is added to the main body of the connector, a crown spring is arranged at the front end of the copper sleeve, and at the same time, a limit surface and a limit groove are arranged on the copper sleeve, the insulating sleeve and the tail pipe, and the tail pipe is welded to the main body of the connector to achieve a stable setting of the copper sleeve, and the test line is welded to the copper sleeve to achieve the transmission of the test signal, thereby avoiding direct connection between the test line and the crown spring, and thus avoiding the problem of stress generated on the solder joint of the test line due to the rotation of the crown spring during the plugging and unplugging process of the MC4 head and the male connector of the test fixture, which causes the solder joint to fall off, thereby achieving the beneficial effect of increasing the service life of the male connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the male connector pin core structure of the solar cell module testing tool described in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the male connector core portion of the solar cell module testing tooling according to an embodiment of the present utility model;

[0022] Figure 3 for Figure 1 Cross-section at the mid-CC position;

[0023] Figure 4 for Figure 1 Cross-section at the middle DD position;

[0024] Among them, 1-coil spring, 2-needle core body, 3-crown spring, 4-copper sleeve, 5-first insulating sleeve, 6-second insulating sleeve, 61-insulating sleeve inner wall limit surface, 62-insulating sleeve outer wall limit surface, 7-tail pipe, 8-test line. DETAILED DESCRIPTION

[0025] The male connector of the solar cell module testing tool of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] This embodiment discloses a male connector for a solar cell module testing tool. Figure 1 、 Figure 2 As shown, it includes a needle core body 2, a crown spring 3 and a tail tube 7; the needle core body 2 is hollow; it also includes a copper sleeve 4 and an insulating sleeve; the crown spring 3, the copper sleeve 4 and the tail tube 7 are sequentially arranged in the hollow cavity of the aforementioned needle core body 2; the crown spring 3 is arranged in the front end groove of the copper sleeve 4; the insulating sleeve is arranged on the copper sleeve 4; the insulation setting between the copper sleeve 4 and the needle core body 2 is achieved by arranging the insulating sleeve; the insulating sleeve and the tail tube 7 are both provided with a through hole for passing the test line 8; in the embodiment of the present disclosure, the test line 8 passes through the through holes on the aforementioned insulating sleeve and the tail tube 7, so that the front end of the test line 8 is welded to the tail end of the copper sleeve 4.

[0027] In the embodiment of the present disclosure, a copper sleeve 4 limiting surface is provided on the outer wall of the tail end of the copper sleeve 4; the insulating sleeve includes a first insulating sleeve 5 and a second insulating sleeve 6; it is convenient to complete the installation of the copper sleeve 4 in the middle of the insulating sleeve, while ensuring insulation between the copper sleeve 4 and the needle core body 2; the first insulating sleeve 5 and the second insulating sleeve 6 are sequentially sleeved on the copper sleeve 4; Figure 3 As shown, a matching insulating sleeve inner wall limiting surface 61 is provided at a position corresponding to the limiting surface of the aforementioned copper sleeve 4 on the inner wall of the second insulating sleeve 6; Figure 4 As shown, an insulating sleeve outer wall limiting surface 62 is provided on the outer wall of the tail end of the second insulating sleeve 6; and a limiting groove corresponding to the aforementioned insulating sleeve outer wall limiting surface 62 is provided on the inner wall of the tail pipe 7.

[0028] In the disclosed embodiment, two coil springs 1 are arranged side by side at the front end of the hollow cavity of the needle core body 2 ; the coil spring 1 is located at the front end of the aforementioned crown spring 3 .

[0029] During testing, the MC4 connector is inserted into the male connector pin. After passing through the coil spring 1, the crown spring 3 contacts the MC4 connector. Crown spring 3, copper sleeve 4, and test wire 8 are then connected. Test data from the solar cell module is transmitted via test wire 8 to the test equipment for analysis and processing.

[0030] In a specific application, another test line 8 can be welded to the tail end of the needle core body 2 at the same time, and the coil spring 1, the needle core body 2 and the test line 8 are connected in sequence to realize the collection and processing of the solar cell module test data.

[0031] During the test, when the MC4 head is inserted into the male contact core, the crown spring 3 will rotate due to plugging and unplugging, and then the rotational force will be transmitted to the copper sleeve 4. Under the action of the limit surface, the copper sleeve 4 will transmit the rotational force to the tail tube 7. Because the tail tube 7 and the contact core body 2 are fixedly connected by welding, the rotational force is offset, which effectively solves the problem of easy detachment of the solder joints of the test line 8 due to fatigue stress, realizes a stable connection between the test line 8 and the copper sleeve 4, and improves the service life of the male contact core.

Claims

1. A male connector for a solar cell module testing tool, comprising a connector body, a crown spring, and a tail tube; the connector body is hollow; and characterized in that: Also includes copper sleeve and insulating sleeve; The crown spring, copper sleeve and tail pipe are sequentially arranged in the hollow cavity of the needle core body; The crown spring is arranged in the front end groove of the copper sleeve; The insulating sleeve is provided on the copper sleeve; The insulating sleeve and the tail pipe are both provided with a through hole for passing the test line; A copper sleeve limiting surface is provided on the outer wall of the tail end of the copper sleeve; a matching insulating sleeve inner wall limiting surface is provided on the inner wall of the insulating sleeve at a position corresponding to the aforementioned copper sleeve limiting surface; An insulating sleeve outer wall limiting surface is provided on the outer wall of the rear end of the insulating sleeve; The inner wall of the tail pipe is provided with a limiting groove corresponding to the limiting surface of the outer wall of the insulating sleeve.

2. The male connector of the solar cell module testing tool according to claim 1, characterized in that: The insulating sleeve includes a first insulating sleeve and a second insulating sleeve; The first insulating sleeve and the second insulating sleeve are sequentially sleeved on the copper sleeve; A matching insulating sleeve inner wall limiting surface is provided at a position on the inner wall of the second insulating sleeve corresponding to the aforementioned copper sleeve limiting surface; An insulating sleeve outer wall limiting surface is provided on the outer wall of the tail end of the second insulating sleeve.

3. The male connector of the solar cell module testing tool according to claim 2, characterized in that: A coil spring is provided at the front end of the hollow cavity of the needle core body; the coil spring is located at the front end of the crown spring.

4. The male connector of the solar cell module testing tool according to claim 3, characterized in that: Two coil springs are arranged in parallel.

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