Calibration master slice self-cleaner and current-voltage test system

Abstract

The utility model relates to a calibration master slice self-cleaning device and a current-voltage test system, the calibration master slice self-cleaning device automatically cleans a calibration master slice, the calibration master slice comprises a base and a functional area, the functional area is arranged on the base, and the calibration master slice self-cleaning device comprises a fixed frame connected with the base; the light-transmitting plate is connected with the fixed frame, and the vertically downward projection range of the light-transmitting plate at least covers the functional area; and the air knife is connected with the light-transmitting plate and is provided with an air knife edge for blowing the top surface of the light-transmitting plate. According to the application, the light-transmitting plate is arranged on the fixed frame, and the air knife is arranged on the light-transmitting plate, so that the accuracy of checking the illumination intensity by the functional area can be guaranteed. Meanwhile, the air knife can be prevented from directly blowing the functional area through the light-transmitting plate, so that the problem that the temperature condition of the current-voltage test is affected when the air knife directly blows the calibration master slice is effectively solved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic testing technology, and in particular to a calibration motherboard self-cleaner and a current-voltage testing system. Background Art

[0002] The full name of the current-voltage (IV) test is the current-voltage characteristic curve test, which evaluates the key parameters of the battery, such as conversion efficiency and power output, by measuring the current-voltage (IV) characteristic curve of the photovoltaic cell under different lighting and temperature conditions. The current-voltage test has very high requirements for light intensity conditions and temperature conditions. The main device for detecting light intensity conditions is the calibration master. If there is dust or foreign matter on the surface of the calibration master, it will seriously affect the calibration of the light intensity conditions. When the calibration of the light intensity conditions is affected, it is difficult to guarantee the accuracy of the results of the current-voltage test. Based on this, in the prior art, an air knife is usually used to blow the calibration master in real time to prevent dust or foreign matter from adhering to the surface of the calibration master. However, when the air knife is used to blow the calibration master, the temperature of the calibration master is affected, and the temperature conditions of the current-voltage test are difficult to guarantee. Utility Model Content

[0003] Based on this, the present application provides a calibration master self-cleaner and a current-voltage testing system to improve the problem of temperature conditions affecting the current-voltage test when the air knife blows the surface of the calibration master to ensure the accuracy of the light intensity conditions in the prior art.

[0004] In a first aspect, the present application provides a calibration master self-cleaner, which automatically cleans the calibration master. The calibration master includes a base and a functional area, and the functional area is provided on the base. The calibration master self-cleaner includes:

[0005] a fixed frame connected to the base;

[0006] a light-transmitting plate connected to the fixed frame, wherein the vertical downward projection range of the light-transmitting plate at least covers the functional area;

[0007] An air knife is connected to the light-transmitting plate and is provided with an air knife opening for sweeping the top surface of the light-transmitting plate.

[0008] In one embodiment, the fixing frame includes two side panels, and the light-transmitting plate is disposed between the tops of the two side panels and connected to the two side panels.

[0009] In one embodiment, the fixed frame also includes an intermediate plate, which is arranged between the bottoms of the two side plates and connected to the two side plates. The intermediate plate is connected to the base, and the vertical downward projection range of the intermediate plate is staggered with the functional area.

[0010] In one embodiment, the intermediate plate and the base are detachably connected via a bolt assembly, an adjustment hole is provided on the intermediate plate, and the bolt assembly is adjustably disposed in the adjustment hole.

[0011] In one embodiment, the side panels and the middle panel are made of acrylic panels, and the light-transmitting panel is made of highly transparent glass.

[0012] In one embodiment, the light-transmitting plate is spaced apart from the functional area.

[0013] In one embodiment, the light-transmitting plate is tilted, and the side of the light-transmitting plate that is higher is the side where the wind knife is located.

[0014] In one embodiment, a main air duct is provided on the wind knife, and a plurality of wind knife openings are provided along the extension direction of the main air duct, and the plurality of wind knife openings are connected to the main air duct.

[0015] In one embodiment, the air knife is further provided with an air source connection hole, and the air source connection hole is connected to the main air duct.

[0016] In a second aspect, the present application provides a current-voltage testing system, which includes any one of the calibration master self-cleaners provided in the present application.

[0017] By providing a light-transmitting plate on a fixed frame and placing an air knife on the light-transmitting plate, the present application can block the functional area of the calibration master at a specified position, making it difficult for dust or foreign matter to adhere to the functional area. At the same time, the air knife can sweep away dust or foreign matter adhering to the top surface of the light-transmitting plate, thereby ensuring the accuracy of the light intensity calibration of the functional area. Furthermore, the present application can also prevent the air knife from directly sweeping the functional area through the light-transmitting plate, effectively alleviating the problem of temperature conditions being affected during current-voltage testing when the air knife directly sweeps the calibration master. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the calibration master;

[0019] Figure 2 A schematic structural diagram of the calibration master self-cleaning device provided in Example 1 of the present application;

[0020] Figure 3 This is a structural diagram of the calibration master self-cleaning device provided in Example 1 of the present application being arranged on the calibration master;

[0021] Figure 4A longitudinal cross-sectional view of the calibration master provided in the first embodiment of the present application, wherein the calibration master is provided with a self-cleaning device.

[0022] Figure numerals: 100, fixed frame; 110, side panel; 120, middle panel; 121, adjustment hole; 200, light-transmitting panel; 300, wind knife; 310, wind knife edge; 320, main air duct; 330, air source connector hole; 400, calibration mother plate; 410, base; 411, fixed plate; 420, functional area; 500, bolt assembly; 510, screw; 520, nut. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0024] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not intended to limit the conditions under which the present invention can be implemented. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in this utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0026] Terms such as "upper," "lower," "left," "right," "center," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification to indicate positions or locations are based on those shown in the accompanying drawings and are intended solely for ease of description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Example 1

[0028] The first embodiment of the present application provides a calibration master self-cleaning device, such as Figures 1 to 4 As shown, the calibration master self-cleaner automatically cleans the calibration master 400, which includes a base 410 and a functional area 420. The functional area 420 is arranged on the base 410. The calibration master self-cleaner includes:

[0029] A fixed frame 100 connected to the base 410;

[0030] A light-transmitting plate 200 connected to the fixed frame 100 , wherein the vertical downward projection range of the light-transmitting plate 200 at least covers the functional area 420 ;

[0031] The air knife 300 is connected to the light-transmitting plate 200 and is provided with an air knife opening 310 for blowing the top surface of the light-transmitting plate 200 .

[0032] like Figure 1 As shown, in this embodiment, the current-voltage (IV) characteristic curve test is exemplarily described to test the electrical characteristics of the photovoltaic module under the condition of constant external circuit conditions. The standard test condition of the current-voltage (IV) characteristic curve test can be a light intensity of 1000W / m 2 , the temperature is 25°C. The calibration master 400 can be used to detect whether the light intensity conditions of the current-voltage characteristic curve test meet the standards and perform calibration. The calibration master 400 may include a base 410 and a functional area 420, wherein the base 410 may be set to a rectangular parallelepiped shape, the functional area 420 may be embedded in the top of the base 410, and a groove for arranging the functional area 420 may be opened in the middle position of the top of the base 410. The functional area 420 is the main component of the calibration master 400 for detecting the light intensity conditions, and the base 410 is mainly used to support the functional area 420.

[0033] like Figures 2 to 4 As shown, in this embodiment, the light-transmitting plate 200 can be connected to the base 410 through the fixed frame 100. When arranging the light-transmitting plate 200, the light-transmitting plate 200 can be arranged directly above the functional area 420, and its vertical downward projection range covers the functional area 420; that is, the functional area 420 is located within the vertical downward projection range of the light-transmitting plate 200. The light-transmitting plate 200 can be understood as a baffle that can avoid affecting the spectrum; when the functional area 420 is exposed to light, almost all of the light can pass through the light-transmitting plate 200 and shine on the functional area 420 without affecting the functional area 420's calibration of the light intensity. Due to the shielding of the light-transmitting plate 200, dust or foreign matter is difficult to adhere to the functional area 420.

[0034] like Figure 3 and Figure 4As shown, the air knife 300 can be fixed to the top of the light-transmitting plate 200 and can be connected to an air source to form an airflow, enabling the air knife 300 to have a sweeping capability. The air knife 300 is provided with an air knife opening 310. The air knife opening 310 can be oriented parallel to the top surface of the light-transmitting plate 200 or at an acute angle to the top surface of the light-transmitting plate 200. The airflow can be discharged from the air knife opening 310 and discharged onto the top surface of the light-transmitting plate 200, so that the air knife 300 can sweep the top surface of the light-transmitting plate 200. By sweeping the top surface of the light-transmitting plate 200 by the air knife 300, dust or foreign matter that is blocked by the light-transmitting plate 200 and attached to the light-transmitting plate 200 can be blown away. When there is no dust or foreign matter on the functional area 420 and the light-transmitting plate 200, the functional area 420 can achieve accurate calibration of the light intensity conditions. Due to the shielding of the light-transmitting plate 200, the wind knife 300 is prevented from directly blowing the functional area 420, and the functional area 420 is not easily affected by the airflow and its temperature is reduced. Therefore, the temperature condition of the current-voltage characteristic curve test is not easily affected by the wind knife 300.

[0035] In summary, by disposing a light-transmitting plate 200 on the fixed frame 100 and by disposing an air knife 300 on the light-transmitting plate 200, the present application can enable the light-transmitting plate 200 to block the functional area 420 of the calibration master 400 at a specified position, thereby making it difficult for dust or foreign matter to adhere to the functional area 420; at the same time, the air knife 300 can be used to sweep away dust or foreign matter adhering to the top surface of the light-transmitting plate 200, thereby ensuring the accuracy of the light intensity calibration of the functional area 420. At the same time, the present application can also prevent the air knife 300 from directly sweeping the functional area 420 through the light-transmitting plate 200, thereby effectively improving the problem of the temperature conditions of the current-voltage test being affected when the air knife 300 directly blows the calibration master 400.

[0036] Specifically, the fixing frame 100 includes two side panels 110 , and the light-transmitting plate 200 is disposed between the tops of the two side panels 110 and connected to the two side panels 110 .

[0037] like Figure 2 and Figure 3 As shown, in this embodiment, for example, the two side panels 110 can be arranged relative to each other and both remain vertical. The interval between the two side panels 110 can be greater than the length of the base 410. When the fixed frame 100 is connected to the base 410, the base 410 can be arranged between the two side panels 110. The light-transmitting plate 200 can be arranged across the top of the two side panels 110 so that its vertical downward projection range covers the functional area 420. The light-transmitting plate 200 can be fixedly connected to the two side panels 110, for example, by bonding, snapping, or connecting through components such as corner brackets, etc., which is not specifically limited in this embodiment.

[0038] It can be understood that this embodiment can further prevent dust or clothes from adhering to the functional area 420 on both sides of the light-transmitting plate 200 by reasonably setting the structure of the fixed frame 100, so as to further avoid dust or foreign matter adhering to the surface of the calibration mother plate 400 affecting the light intensity conditions during the current-voltage test; at the same time, the two side panels 110 can also block the blowing airflow of the wind knife 300, so as to further reduce the impact of the wind knife 300 on the temperature conditions during the test.

[0039] More specifically, the fixed frame 100 also includes an intermediate plate 120, which is arranged between the bottoms of the two side plates 110 and connected to the two side plates 110. The intermediate plate 120 is connected to the base 410, and the vertical downward projection range of the intermediate plate 120 is staggered with the functional area 420.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the middle panel 120 can be arranged across the bottom of the two side panels 110 and can be fixedly connected to the two side panels 110. The fixed connection method can also be bonding, clamping, or connecting with components such as corner brackets. A fixing plate 411 can be provided on one side of the base 410 in the width direction. The fixing plate 411 can be integrally formed with the base 410. The middle panel 120 can be arranged on the fixing plate 411 so that its vertical downward projection is offset from the functional area 420. That is, the functional area 420 is located between the vertical downward projection range of the middle panel 120, thereby preventing the middle panel 120 from blocking the functional area 420.

[0041] It is understandable that this embodiment further reasonably arranges the structure of the fixing frame 100 to facilitate the fixing frame 100 to connect the light-transmitting plate 200 and the base 410 , and at the same time facilitates the arrangement of the light-transmitting plate 200 at a designated position to shield the functional area 420 .

[0042] Specifically, the middle plate 120 and the base 410 are detachably connected via a bolt assembly 500 . An adjustment hole 121 is provided on the middle plate 120 , and the bolt assembly 500 is adjustably disposed in the adjustment hole 121 .

[0043] like Figure 3 and Figure 4As shown, in this embodiment, for example, the intermediate plate 120 and the base 410 can be connected in a detachable manner, so that the calibration master self-cleaner can be prepared separately and then arranged on the calibration master 400. The detachable connection can be through a bolt assembly 500; the bolt assembly 500 can include a screw 510 and a nut 520, wherein the screw 510 can be fixed to the fixing plate 411. The adjustment hole 121 on the intermediate plate 120 can be a waist-shaped hole, and its length direction can be the width direction of the base 410. During connection, the screw 510 can pass through the adjustment hole 121. By pushing the intermediate plate 120, the screw 510 slides in the adjustment hole 121, and the position of the intermediate plate 120 can be adjusted. When the intermediate plate 120 moves and the vertical downward projection range of the light-transmitting plate 200 covers the functional area 420, the intermediate plate 120 is adjusted into place. Subsequently, the nut 520 is connected to the bolt and the nut 520 is tightened to achieve the connection between the middle plate 120 and the base 410 .

[0044] like Figure 3 As shown, in this embodiment, several adjustment holes 121 can also be arranged at intervals on the middle plate 120 along the length direction of the base 410. When the middle plate 120 is fixed on the base 410, the bolts can be arranged in any adjustment hole 121 according to actual needs.

[0045] Of course, in some embodiments, the bolt assembly 500 can also be a bolt and a gasket, the rod of the bolt can pass through the adjustment hole 121 on the middle plate 120 and be threadedly connected to the fixing plate 411; the gasket can be sleeved on the rod of the bolt and arranged between the head of the bolt and the top surface of the middle plate 120.

[0046] It can be understood that in this embodiment, the middle plate 120 is detachably connected to the base 410 through the bolt assembly 500, and an adjustment hole 121 is provided on the middle plate 120 to cooperate with the bolt assembly 500, which can further improve the accuracy of the position of the light-transmitting plate 200 during the arrangement process, so that it can effectively block the functional area 420.

[0047] More specifically, the side panels 110 and the middle panel 120 are made of acrylic panels, and the light-transmitting panel 200 is made of highly transparent glass.

[0048] like Figure 2 and Figure 4 As shown, in this embodiment, high-transparency glass has better light transmittance than acrylic panels, which can reduce the impact on the light received by the functional area 420. In this embodiment, by setting the light-transmitting panel 200 to be made of high-transparency glass and setting the side panels 110 and the middle panel 120 to be made of acrylic panels, the insufficient light transmittance of the light-transmitting panel 200 can be avoided while reducing costs.

[0049] Specifically, the light-transmitting plate 200 is spaced apart from the functional area 420 .

[0050] like Figure 4 As shown, in this embodiment, for example, when the light-transmitting plate 200 is arranged directly above the functional area 420 and the vertical downward projection of the light-transmitting plate 200 covers the functional area 420, a certain distance is maintained between the light-transmitting plate 200 and the functional area 420, that is, the light-transmitting plate 200 and the functional area 420 are not in direct contact. This distance can be reasonably set based on actual needs, such as whether there is interference between the fixed frame 100 and other test devices.

[0051] It can be understood that when the wind knife 300 blows on the top surface of the light-transmitting plate 200, the temperature of the light-transmitting plate 200 decreases due to the airflow passing through its top surface. In this embodiment, the light-transmitting plate 200 is kept apart from the functional area 420, which can further prevent the wind knife 300 from affecting the temperature of the functional area 420.

[0052] Specifically, the light-transmitting plate 200 is tilted, and the side of the light-transmitting plate 200 that is higher is the side where the wind knife 300 is located.

[0053] like Figure 2 and Figure 4 As shown, in this embodiment, for example, the light-transmitting plate 200 can be tilted along the width direction of the base 410. When the light-transmitting plate 200 is tilted, it has a higher side and a lower side along the width direction of the base 410. The air knife 300 can be configured in an elongated shape, and its length direction can be the length direction of the base 410. When the air knife 300 is arranged on the light-transmitting plate 200, it can be placed on the higher side of the light-transmitting plate 200. In this case, the air knife opening 310 can be tilted downward.

[0054] It is understandable that when the wind knife 300 blows the top surface of the light-transmitting plate 200 on the higher side of the light-transmitting plate 200, the inclined arrangement of the light-transmitting plate 200 is conducive to the sliding of dust or foreign matter, which can ensure a better blowing effect.

[0055] Specifically, a main air duct 320 is provided on the air knife 300 , and a plurality of air knife openings 310 are provided along the extension direction of the main air duct 320 , and the plurality of air knife openings 310 are connected to the main air duct 320 .

[0056] like Figure 2 and Figure 4As shown, in this embodiment, for example, the wind knife 300 can also be made of an acrylic plate, and the main air duct 320 and the wind knife edge 310 can be prepared by drilling the base material of the wind knife 300. The main air duct 320 can be set as a cylindrical channel, and the wind knife edge 310 can be set as a circular hole connected to the main air duct 320. The extension direction of the main air duct 320 is the axial direction of the main air duct 320. The wind knife edge 310 can be set along the radial direction of the main air duct 320, and a number of wind knife edges 310 can be set at equal intervals along the axial direction of the main air duct 320. The axes of the several wind knife edges 310 can be set to be parallel, or they can be set at a certain angle, and they can be reasonably set according to the specific actual cleaning needs.

[0057] It can be understood that this embodiment facilitates the blowing of the wind knife 300 on the top surface of the light-transmitting plate 200 by reasonably arranging the structure of the wind knife 300, while ensuring the blowing effect of the wind knife 300 on the top surface of the light-transmitting plate 200.

[0058] Specifically, the air knife 300 is further provided with an air source connection hole 330 , which is connected to the main air duct 320 .

[0059] like Figure 2 As shown, in this embodiment, it is exemplified that after the air knife 300 is drilled to form the main air duct 320, the drilled position can be further threaded to form an air source connector hole 330. The air source connector hole 330 is used to arrange a connector, which serves as the inlet of the main air duct 320, and a plurality of air knife openings 310 serve as the outlet of the main air duct 320. The air source connector hole 330 can be a threaded hole, and the connector can be threadedly connected in the air source connector hole 330. The connector can be a quick-connect connector, and the pipeline structure of the air source can be connected to the connector to communicate with the air duct. The pipeline structure of the air source can also be configured with an on-off valve, etc. to control the operating status of the air knife 300.

[0060] It is understandable that, in this embodiment, the air source connection hole 330 is provided on the air knife 300 to facilitate the connection between the air duct and the air source so that the air knife 300 can blow the top surface of the light-transmitting plate 200 .

[0061] The implementation principle of the calibration master self-cleaner provided in the first embodiment of the present application is as follows:

[0062] Insert the bolts on the fixing plate 411 through the adjustment holes 121 on the middle plate 120, then push the middle plate 120 to adjust its position. When the middle plate 120 is adjusted so that the vertical downward projection of the light-transmitting plate 200 covers the functional area 420, connect the nuts 520 to the bolts and tighten them to secure the middle plate 120 to the fixing plate 411. Then, activate the air knife 300, so that the several air knife openings 310 blow against the top surface of the light-transmitting plate 200.

[0063] By placing a light-transmitting plate 200 on the fixed frame 100 and an air knife 300 on the light-transmitting plate 200, the present application can block the functional area 420 of the calibration master 400 at a designated location, making it difficult for dust or foreign matter to adhere to the functional area 420. At the same time, the air knife 300 can sweep away dust or foreign matter adhering to the top surface of the light-transmitting plate 200, thereby ensuring the accuracy of the light intensity calibration of the functional area 420. Furthermore, the present application can prevent the air knife 300 from directly sweeping the functional area 420 through the light-transmitting plate 200, thereby effectively alleviating the problem of the temperature conditions of the current-voltage test being affected when the air knife 300 directly sweeps the calibration master 400.

[0064] Example 2

[0065] A second embodiment of the present application provides a current-voltage testing system, which includes any one of the calibration motherboard self-cleaning devices provided in the present application.

[0066] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A calibration master self-cleaner, characterized in that: The calibration master self-cleaner automatically cleans the calibration master (400), wherein the calibration master (400) comprises a base (410) and a functional area (420), wherein the functional area (420) is arranged on the base (410), and the calibration master self-cleaner comprises: a fixed frame (100) connected to the base (410); a light-transmitting plate (200) connected to the fixed frame (100), wherein the vertical downward projection range of the light-transmitting plate (200) at least covers the functional area (420); An air knife (300) is connected to the light-transmitting plate (200) and is provided with an air knife opening (310) for blowing the top surface of the light-transmitting plate (200).

2. The calibration master self-cleaning device according to claim 1, characterized in that: The fixing frame (100) comprises a side panel (110), wherein two side panels (110) are provided, and the light-transmitting plate (200) is provided between the tops of the two side panels (110) and is connected to the two side panels (110).

3. The calibration master self-cleaning device according to claim 2, characterized in that: The fixed frame (100) further includes an intermediate plate (120), which is arranged between the bottoms of the two side plates (110) and connected to the two side plates (110). The intermediate plate (120) is connected to the base (410), and the vertical downward projection range of the intermediate plate (120) is staggered with the functional area (420).

4. The calibration master self-cleaning device according to claim 3, characterized in that: The intermediate plate (120) and the base (410) are detachably connected via a bolt assembly (500); an adjustment hole (121) is provided on the intermediate plate (120); and the bolt assembly (500) is adjustably arranged in the adjustment hole (121).

5. The calibration master self-cleaning device according to claim 4, characterized in that: The side panels (110) and the middle panel (120) are made of acrylic panels, and the light-transmitting panel (200) is made of highly transparent glass.

6. The calibration master self-cleaning device according to claim 1, characterized in that: The light-transmitting plate (200) and the functional area (420) are spaced apart.

7. The calibration master self-cleaning device according to claim 1, characterized in that: The light-transmitting plate (200) is arranged tilted, and the side of the light-transmitting plate (200) at a higher position is the side where the wind knife (300) is located.

8. The calibration master self-cleaning device according to claim 1, characterized in that: The wind knife (300) is provided with a main air duct (320), and a plurality of wind knife openings (310) are provided along the extension direction of the main air duct (320), and the plurality of wind knife openings (310) are all connected to the main air duct (320).

9. The calibration master self-cleaning device according to claim 8, characterized in that: The air knife (300) is also provided with an air source connection hole (330), and the air source connection hole (330) is communicated with the main air duct (320).

10. A current-voltage testing system, characterized in that: The current-voltage testing system includes the calibration master self-cleaner according to any one of claims 1 to 9.

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