Photovoltaic module test module and test equipment

Abstract

The utility model relates to the technical field of photovoltaic module production, and discloses a photovoltaic module test module and test equipment, and the photovoltaic module test module comprises a test board body which is the same as a photovoltaic module product tested by the test equipment in size; the junction box is provided with a joint, and the joint is suitable for being electrically connected with a power test tool of the test equipment; the frame is located at the edge of the testing plate body, a testing hole is formed in the frame, and an insulating cushion block is arranged at the testing hole; one end of the first bus bar is electrically connected with the junction box, and the other end of the first bus bar is electrically connected with the frame. The problem that unqualified products may flow to the market when the test equipment fails is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component production, in particular to a photovoltaic component test module and test equipment. Background Art

[0002] Photovoltaic modules are devices that convert solar energy into electricity and are widely used in modern industry and construction. After production, finished modules undergo performance testing using specialized testing equipment for withstand voltage, insulation, and grounding. This ensures that product specifications meet standards and prevents the release of substandard products that could pose safety risks.

[0003] In related technologies, the testing equipment tests the product by testing the power of the product through a power testing tool, and electrically connects it to the corresponding contacts or wiring sockets on the product through probes and other components. Then, a predetermined voltage is applied to the product through the power testing tool, probes and other components, and the product is tested for multiple indicators including current, resistance, etc., and whether the product is qualified is judged based on the values ​​of the indicators.

[0004] However, in the above-mentioned testing equipment, although the testing equipment can detect whether the product is qualified during normal operation, when the testing equipment itself cannot perform self-inspection, it will not be able to detect unqualified products when the equipment fails, which may cause unqualified products to flow into the market and cause safety hazards. Utility Model Content

[0005] In view of this, the present invention provides a photovoltaic module test module and test equipment to test whether the test equipment can detect unqualified products, so as to solve the problem that the test equipment itself fails and may cause unqualified products to flow into the market.

[0006] In the first aspect, the utility model provides a photovoltaic module test module, comprising: a test board body, which is the same size as the photovoltaic module product tested by the test equipment; a junction box, on which a connector is provided, and the connector is suitable for being electrically connected to the power test tooling of the test equipment; a frame, located at the edge of the test board body, on which a test hole is provided, and an insulating pad is provided at the test hole; a first bus bar, one end of the first bus bar is electrically connected to the junction box, and the other end is electrically connected to the frame.

[0007] Beneficial effect: By setting a test board with the same size as the photovoltaic module product tested by the test equipment to simulate the tested product, the junction box is used to simulate the interface for power testing on the tested product, and the test hole is set to simulate the test point on the tested product. During the process of the test equipment performing a DC withstand voltage test on the product, the test equipment applies a predetermined value voltage between the power test interface and the test point, and measures the current of the connected circuit at this time. When the current is less than the predetermined value, the product is judged to be qualified, otherwise it is judged to be unqualified. Because the test module electrically connects the junction box to the frame through the first bus bar, and an insulating spacer is set at the test hole at the test point position, when the test equipment performs a DC withstand voltage test on the test module, a conductive circuit is formed between the junction box, the first bus bar, and the test hole on the frame, and the measured current can be made greater than the standard value by controlling the resistance value of the insulating spacer, so that the test module is classified as an "unqualified product" during the DC withstand voltage test, thereby verifying whether the test equipment can detect unqualified products, thereby ensuring the reliability of the test equipment and preventing unqualified products from flowing into the market and causing safety hazards.

[0008] In an optional embodiment, a clearance cutout is provided on a side of the insulating spacer away from the frame, and the clearance cutout is in a cross shape or a M shape.

[0009] Beneficial effect: By setting a "cross" or "M" shaped incision on the insulating spacer, when the probe extends to the test hole, the probe is inserted into the incision, and the part of the insulating spacer located at the incision makes way for the probe to avoid damage to the probe. At the same time, the insulating spacer wraps the circumference of the probe to prevent the probe from contacting the frame.

[0010] In an optional embodiment, a grounding hole is provided on the frame.

[0011] Beneficial effect: When the test equipment performs a grounding resistance test on the product, one of the probes of the test equipment extends to the test point of the product under test, and the other probe extends to the grounding hole of the product under test, and a current of a predetermined intensity is applied to detect the current value of the circuit and calculate the resistivity value. When the resistivity value is less than the predetermined value, the product is judged to be qualified, otherwise the product is judged to be unqualified. Since the test module is provided with a grounding hole and an insulating pad is provided at the position of the test hole equivalent to the test point, when the test equipment detects the test module, when the rated intensity current is passed, under the obstruction of the insulating pad, a connected loop is not actually formed, so the calculated resistivity value tends to infinity, far exceeding the predetermined value, making the test module an "unqualified product" in the grounding resistance detection process of the test equipment, thereby verifying whether the test equipment can detect unqualified products, and then ensuring the reliability of the test equipment, and avoiding the situation where unqualified products flow into the market and cause safety hazards.

[0012] In an optional embodiment, the test board includes multiple battery cells and a first carrier plate, the first carrier plate is made of an insulating material, the battery cells are arranged on the first carrier plate, and the frame is arranged around the first carrier plate and connected to the first carrier plate.

[0013] Beneficial effect: By arranging multiple battery cells on the test board body and using the first carrier board as a mounting carrier for the multiple battery cells, the test module can better simulate the tested product.

[0014] In an optional embodiment, the test board body also includes a second carrier plate arranged opposite to the first carrier plate, the second carrier plate is made of an insulating material, the battery cell is located between the first carrier plate and the second carrier plate, the frame is connected to the second carrier plate, and closes the gap between the edges of the first carrier plate and the second carrier plate.

[0015] Beneficial effects: The first carrier plate and the second carrier plate protect the battery cells from both sides respectively, preventing the battery cells from being damaged during the use of the test module, effectively extending the number of reusable times and service life of the test module, and avoiding accidental short circuits between the battery cells and other components that may cause test failure or even danger, thereby improving the reliability of the test module.

[0016] In an optional embodiment, the junction box is provided on the second carrier plate, and the battery cells are respectively adhered to the first carrier plate and the second carrier plate.

[0017] Beneficial effects: The second carrier plate provides an installation basis for the junction box, and at the same time, the battery cells are bonded to the first carrier plate and the second carrier plate, providing a fixed basis for the battery cells, further improving the structural reliability and extending the life of the module.

[0018] In an optional embodiment, a second bus bar and a third bus bar are further included, wherein the second bus bar connects the plurality of battery cells in series, and one end of the third bus bar is electrically connected to the second bus bar, and the other end is electrically connected to the frame.

[0019] Beneficial effect: When the test equipment performs insulation resistance testing on the product, one of the probes of the test equipment is electrically connected to the test point, the other probe is electrically connected to the battery cell, and a voltage of predetermined strength is connected between the two probes. The current of the loop is detected and the resistivity is judged according to the current. If the actual resistivity is less than the standard value, it is verified as unqualified; otherwise, it is verified as qualified. When the test equipment performs insulation resistance testing on this test module, one of the probes is connected to the insulating pad at the test hole, and the other probe is electrically connected to the battery cell, thereby forming a connection loop of the battery cell, the second bus bar, the third bus bar, and the frame. The final resistance value measured is close to the resistance value of the insulating pad. Therefore, the resistivity of the insulating pad can be controlled to make the test module an "unqualified product" during the insulation resistance test of the test equipment, thereby verifying whether the test equipment can detect unqualified products, thereby ensuring the reliability of the test equipment, and avoiding the situation where unqualified products flow into the market and cause safety hazards.

[0020] In an optional embodiment, the frame includes a first frame bar and a second frame bar, the first frame bar intersects and is connected to the second frame bar, the third bus bar is electrically connected to the frame by being connected to the second frame bar, the test hole is provided on the first frame bar, and the grounding hole is provided on the first frame bar and is located on the side of the test hole away from the second frame bar.

[0021] Beneficial effect: By setting the first frame bar and the second frame bar, and setting the third bus bar and the grounding hole on the first frame bar and the second frame bar respectively, the test module simulates the position status of each component of a normal product, and the third bus bar is set away from the grounding hole and the test hole, avoiding the inconvenience caused by accidental short circuit to the test.

[0022] In an optional embodiment, the resistivity of the insulating spacer is greater than or equal to 1015Ω·m.

[0023] Beneficial effect: By controlling the resistivity of the insulating pad, the values ​​of various indicators of the test module during the testing process of the tested equipment are adjusted, so that the test device meets the standards of "unqualified products" in various tests, and then verifies whether the test equipment can normally detect unqualified products.

[0024] In the second aspect, the utility model also provides a testing device, including: the above-mentioned photovoltaic component test module; a power testing tool, suitable for electrically connecting to the connector of the junction box; and multiple probes, each of which is suitable for contacting and electrically connecting to different test holes of the frame.

[0025] Beneficial Effects: By using the above-mentioned testing device, the above-mentioned testing device is tested during the operation of the equipment. Since the above-mentioned testing device is configured with the standard of "unqualified products" in each test, during the testing process, if the results of each test are "unqualified products", the testing equipment is operating normally and can detect unqualified products. If the result of any test is "qualified products", the equipment test is abnormal and requires maintenance. At the same time, by setting up the above-mentioned testing device, the self-test of this testing equipment does not require manual inspection by staff, avoiding the situation where staff members release the current during the test process, which poses a threat to staff safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 The figure is a schematic diagram of the overall structure of a photovoltaic module test module according to an embodiment of the present utility model.

[0028] Description of reference numerals:

[0029] 100, test board; 200, junction box; 201, connector; 300, frame; 301, test hole; 3011, insulating spacer; 302, grounding hole; 303, first frame bar; 304, second frame bar; 400, first bus bar; 500, battery cell; 600, second bus bar; 700, third bus bar. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following combination Figure 1 , describing the embodiments of the present utility model.

[0032] According to an embodiment of the present invention, a photovoltaic module test module is provided. Figure 1, including a test board body 100, which has the same size as the photovoltaic module product tested by the test equipment; a junction box 200, on which a connector 201 is provided, and the connector 201 is suitable for electrically connecting to the power test tooling of the test equipment; a frame 300, located at the edge of the test board body 100, and a test hole 301 is provided on the frame 300, and an insulating spacer 3011 is provided at the test hole 301; a first bus bar 400, one end of the first bus bar 400 is electrically connected to the junction box 200, and the other end is electrically connected to the frame 300.

[0033] In this embodiment, a test board 100 having the same size as the photovoltaic module product being tested by the test equipment is used to simulate the product being tested, a junction box 200 is used to simulate the interface for power testing on the product being tested, and a test hole 301 is provided to simulate the test point on the product being tested. During the process of the test equipment performing a DC withstand voltage test on the product, the test equipment applies a predetermined value voltage between the power test interface and the test point, and measures the current of the connected circuit at this time. When the current is less than the predetermined value, the product is judged to be qualified, otherwise the product is judged to be unqualified; since this test module electrically connects the junction box 200 and the frame 300 through the first bus bar 400, and an insulating pad 3011 is provided at the test hole 301 at the test point position, when the test equipment performs a DC withstand voltage test on this test module, a conductive circuit is formed between the junction box 200, the first bus bar 400, and the test hole 301 on the frame 300, and the measured current can be made greater than the standard value by controlling the resistance value of the insulating pad 3011, so that the test module is classified as an "unqualified product" during the DC withstand voltage test, thereby verifying whether the test equipment can detect unqualified products, and then ensuring the reliability of the test equipment, and avoiding the situation where unqualified products flow into the market and cause safety hazards.

[0034] In the above embodiment, specifically, the insulating spacer 3011 can be positioned at the opening of the test hole 301 or within the test hole 301. The first busbar 400 can be a wire or other conductive component. Furthermore, the test board 100 can be individually manufactured to mimic the dimensions of a normal photovoltaic module tested by the test equipment, or it can be modified from a normal photovoltaic module.

[0035] In addition, specifically, during the DC withstand voltage test performed by the test equipment on the test module, the predetermined voltage applied between the junction box 200 and the test hole 301 is 4800KV, and the predetermined value of the measured current is 50uA, that is, during the test of the test module, the measured leakage current of the frame 300 is greater than 50uA.

[0036] In one embodiment, a clearance cutout is provided on a side of the insulating spacer 3011 away from the frame 300 , and the clearance cutout is in a cross shape or a M shape.

[0037] In this embodiment, a "X" or "M"-shaped incision is provided on the insulating spacer 3011. When the probe extends toward the test hole 301, the probe is inserted into the incision. The portion of the insulating spacer 3011 located at the incision makes way for the probe to avoid damage to the probe. At the same time, the insulating spacer 3011 wraps the circumference of the probe to prevent the probe from contacting the frame 300.

[0038] In one embodiment, a grounding hole 302 is provided on the frame 300 .

[0039] In this embodiment, when the test equipment performs a grounding resistance test on a product, one of the probes of the test equipment extends to the test point of the product under test, and the other probe extends to the grounding hole 302 of the product under test, and a current of a predetermined intensity is applied to detect the current value of the circuit and calculate the resistivity value. When the resistivity value is less than the predetermined value, the product is judged to be qualified, otherwise the product is judged to be unqualified. Since the test module is provided with a grounding hole 302 and an insulating spacer 3011 is provided at the position of the test hole 301 equivalent to the test point, when the test equipment detects the test module, when the rated intensity current is passed, the insulating spacer 3011 does not actually form a connected loop, so the calculated resistivity value tends to infinity, far exceeding the predetermined value, making the test module an "unqualified product" in the grounding resistance detection process of the test equipment, thereby verifying whether the test equipment can detect unqualified products, thereby ensuring the reliability of the test equipment, and avoiding the situation where unqualified products flow into the market and cause safety hazards.

[0040] In the above embodiment, the predetermined current intensity is 75A, and the predetermined value of the resistance is 100MΩ, that is, the product is qualified when the resistance is less than 100Ω·m.

[0041] In one embodiment, the test board 100 includes a plurality of battery cells 500 and a first carrier plate. The first carrier plate is made of an insulating material. The battery cells 500 are arranged on the first carrier plate. The frame 300 is arranged around the first carrier plate and connected to the first carrier plate.

[0042] It should be noted that the battery cell 500 in this embodiment is only partially shown in the drawings.

[0043] In this embodiment, by arranging a plurality of battery cells 500 on the test board 100 and using the first carrier plate as a mounting carrier for the plurality of battery cells 500 , the test module can better simulate the product under test.

[0044] In one embodiment, the test board body 100 also includes a second carrier plate arranged opposite to the first carrier plate, the second carrier plate is made of an insulating material, the battery cell 500 is located between the first carrier plate and the second carrier plate, and the frame 300 is connected to the second carrier plate and closes the gap between the edges of the first carrier plate and the second carrier plate.

[0045] In this embodiment, the battery cell 500 is protected from both sides by the first carrier plate and the second carrier plate respectively, thereby preventing the battery cell 500 from being damaged during the use of the test module, effectively extending the number of reusable times and service life of the test module, and preventing the battery cell 500 from accidentally short-circuiting with other components, resulting in test failure or even danger, thereby improving the reliability of the test module.

[0046] In one embodiment, the junction box 200 is disposed on the second carrier plate, and the battery cells 500 are adhered to the first carrier plate and the second carrier plate, respectively.

[0047] In this embodiment, the second carrier plate provides an installation base for the junction box 200, and the battery cell 500 is bonded to the first carrier plate and the second carrier plate, providing a fixed base for the battery cell 500, further improving the structural reliability and extending the module life.

[0048] In one embodiment, a second bus bar 600 and a third bus bar 700 are further included. The second bus bar 600 connects the plurality of battery cells 500 in series. One end of the third bus bar 700 is electrically connected to the second bus bar 600 and the other end is electrically connected to the frame 300 .

[0049] In this embodiment, when the test equipment performs an insulation resistance test on the product, one of the probes of the test equipment is electrically connected to the test point, the other probe is electrically connected to the battery cell 500, and a voltage of a predetermined strength is connected between the two probes. The current of the loop is detected and the resistivity is judged based on the current. If the actual resistivity is less than the standard value, it is verified as unqualified; otherwise, it is verified as qualified. When the test equipment performs an insulation resistance test on this test module, one of the probes is connected to the insulating pad 3011 at the test hole 301, and the other probe is electrically connected to the battery cell 500, thereby forming a connection loop of the battery cell 500, the second bus bar 600, the third bus bar 700, and the frame 300. The final resistance value measured is close to the resistance value of the insulating pad 3011. Therefore, by controlling the resistivity of the insulating pad 3011, the test module can be classified as an "unqualified product" during the insulation resistance test of the test equipment, thereby verifying whether the test equipment can detect unqualified products, thereby ensuring the reliability of the test equipment, and avoiding the situation where unqualified products flow into the market and cause safety hazards.

[0050] In the above embodiment, specifically, during the insulation resistance test, the predetermined intensity voltage between the two probes is 1500KV, and the resistivity standard value is 40MΩ·m, that is, when the test equipment detects the test module in this embodiment, the final resistivity measured is less than 40MΩ·m, that is, the resistivity of the insulating pad 3011 needs to be less than 40MΩ·m.

[0051] In one embodiment, the frame 300 includes a first frame bar 303 and a second frame bar 304, the first frame bar 303 intersects and is connected to the second frame bar 304, the third bus bar 700 is electrically connected to the frame 300 by being connected to the second frame bar 304, the test hole 301 is provided on the first frame bar 303, and the grounding hole 302 is provided on the first frame bar 303 and is located on the side of the test hole 301 away from the second frame bar 304.

[0052] In this embodiment, by setting the first frame bar 303 and the second frame bar 304, and setting the third bus bar 700 and the grounding hole 302 on the first frame bar 303 and the second frame bar 304 respectively, the test module simulates the position status of each component of a normal product, and the third bus bar 700 is set away from the grounding hole 302 and the test hole 301, avoiding the inconvenience caused by accidental short circuit to the test.

[0053] In one embodiment, the resistivity of the insulating spacer 3011 is greater than or equal to 10 15 Ω·m, and the resistivity of the insulating spacer 3011 is less than 40 MΩ·m.

[0054] In this embodiment, by controlling the resistivity of the insulating pad 3011, the values ​​of various indicators of the test module during the detection process of the tested equipment are adjusted, so that the test device meets the standards of "unqualified products" in various tests, and then verifies whether the test equipment can normally detect unqualified products.

[0055] According to an embodiment of the present invention, on the other hand, a testing device is also provided, including: the above-mentioned photovoltaic component test module; a power testing tool suitable for electrically connecting to the connector 201 of the junction box 200; and multiple probes, each of which is suitable for contacting and electrically connecting to different test holes 301 of the frame 300.

[0056] In this embodiment, the aforementioned testing device is used to test the device while it is in operation. Since the testing device is configured to meet the "failure" standard for each test, if the results of all tests are "failure," the testing device is operating normally and can detect failed products. If any test result is "pass," the device is abnormal and requires repair. Furthermore, the provision of the aforementioned testing device eliminates the need for manual testing by staff, preventing the need for staff to release current during testing, which could pose a safety threat to staff.

[0057] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A photovoltaic module test module, characterized in that: include: The test board (100) has the same size as the photovoltaic module product tested by the test equipment; A junction box (200), wherein the junction box (200) is provided with a connector (201), and the connector (201) is suitable for being electrically connected to a power test fixture of a test device; A frame (300) is located at the edge of the test board body (100), a test hole (301) is provided on the frame (300), and an insulating spacer (3011) is provided at the test hole (301); A first bus bar (400), one end of the first bus bar (400) is electrically connected to the junction box (200), and the other end is electrically connected to the frame (300).

2. The photovoltaic module test module according to claim 1, characterized in that: A clearance cutout is provided on a side of the insulating spacer (3011) away from the frame (300), wherein the clearance cutout is in the shape of a cross or a rice shape.

3. The photovoltaic module test module according to claim 1, characterized in that: A grounding hole (302) is provided on the frame (300).

4. The photovoltaic module test module according to claim 3, characterized in that: The test board body (100) comprises a plurality of battery cells (500) and a first carrier plate, wherein the first carrier plate is made of an insulating material, the battery cells (500) are arranged on the first carrier plate, and the frame (300) is arranged in the circumference of the first carrier plate and connected to the first carrier plate.

5. The photovoltaic module test module according to claim 4, characterized in that: The test board body (100) further includes a second carrier plate arranged opposite to the first carrier plate, the second carrier plate being made of an insulating material, the battery cell (500) being located between the first carrier plate and the second carrier plate, and the frame (300) being connected to the second carrier plate and closing a gap between edges of the first carrier plate and the second carrier plate.

6. The photovoltaic module test module according to claim 5, characterized in that: The junction box (200) is arranged on the second supporting plate, and the battery cells (500) are respectively bonded to the first supporting plate and the second supporting plate.

7. The photovoltaic module test module according to claim 4, characterized in that: It also includes a second bus bar (600) and a third bus bar (700), wherein the second bus bar (600) connects the plurality of battery cells (500) in series, and one end of the third bus bar (700) is electrically connected to the second bus bar (600) and the other end is electrically connected to the frame (300).

8. The photovoltaic module test module according to claim 7, characterized in that: The frame (300) includes a first frame bar (303) and a second frame bar (304), the first frame bar (303) intersects and is connected to the second frame bar (304), the third bus bar (700) is electrically connected to the frame (300) by being connected to the second frame bar (304), the test hole (301) is provided on the first frame bar (303), and the grounding hole (302) is provided on the first frame bar (303) and is located on a side of the test hole (301) away from the second frame bar (304).

9. The photovoltaic module test module according to any one of claims 1 to 8, characterized in that: The resistivity of the insulating spacer (3011) is greater than or equal to 1015Ω·m, and the resistivity of the insulating spacer (3011) is less than 40MΩ·m.

10. A testing device, characterized in that: include: The photovoltaic module testing module according to any one of claims 1 to 9; A power testing tool, adapted to be electrically connected to the connector (201) of the junction box (200); A plurality of probes are provided, each of the plurality of probes being adapted to contact and electrically connect with different test holes (301) of the frame (300).

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