Standard sheet for current-voltage test and current-voltage test system

Abstract

The utility model relates to a current-voltage test standard sheet and a current-voltage test system. The current-voltage test standard sheet comprises a standard sheet body; a bearing table; at least one side of the top of the protective cover is made of a light-transmitting material, the protective cover is connected with the bearing table and covers the standard sheet body, the vertically upward projection of the standard sheet body is located in one side of the top of the protective cover, and one side of the top of the protective cover is obliquely arranged. The standard sheet body can be protected through the protective cover, so that dust or other sundries are prevented from falling on the standard sheet body, and meanwhile, the dust or other sundries falling to one side of the top of the protective cover can slide off under the action of self weight; therefore, dust or other impurities are prevented from being attached to one side of the top of the protective cover to affect the calibration function of the standard sheet body, and the problem that the standard sheet is affected by dust or other impurities and the accuracy of the standard sheet is difficult to guarantee can be effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of current-voltage testing, and particularly to a standard sheet for current-voltage testing and a current-voltage testing system. Background Art

[0002] During the production and preparation process, solar cells need to be subjected to current-voltage (I-V) testing. The working principle is as follows: When the solar cell reaches the test position, the upper and lower probes are pressed down onto the solar cell, and the positive and negative poles are connected. Subsequently, after the solar simulator is turned on, it simulates sunlight shining on the cell to measure the short-circuit current (Isc) and open-circuit voltage (Uoc). Then, the test values are transmitted to the curve-tracking processor system through the upper and lower probe wires. At the same time, an infrared detector measures the solar cell temperature Tcell and also transmits the data to the curve-tracking processor system. The system corrects the test results according to the light intensity (Insol) measured by the calibration master sheet and the temperature of the small calibration sheet (Tmonitorcell) to obtain the true short-circuit current (Isc) and open-circuit voltage (Uoc) of the solar cell. Further, it should be noted that in addition to the short-circuit current (Isc), open-circuit voltage (Uoc), leakage current (Irev2), cell temperature (Tcell), light intensity (Insol), and the temperature of the small calibration sheet (Tmonitorcell) being test values, other electrical parameters are calculated using the four-quadrant method of the test system. Finally, the corrected test values and calculated value information are output to the PL computer.

[0003] Since the current-voltage test system is affected by external factors and there are large deviations in the test data, calibration sheets are needed for regular detection and calibration. The specific calibration process is to use the calibration sheet for testing. When the deviation range between the test value and the calibration value of the calibration sheet exceeds the standard, systematic troubleshooting (hardware, software, environment, etc.) is required. After eliminating the anomalies, the calibration sheet needs to be used for testing and recalibration, and it can be corrected and calibrated within the allowable range according to the calibration values of the short-circuit current (Isc) and open-circuit voltage (Uoc) of the calibration sheet. However, during the calibration process of the standard sheet, dust or other impurities may fall on the standard sheet, affecting the accuracy of the standard sheet during calibration. Summary of the Utility Model

[0004] Based on this, this application provides a standard sheet for current-voltage testing and a current-voltage testing system to improve the problem that it is difficult to ensure the accuracy of the standard due to the influence of dust or other impurities on the standard sheet in the prior art.

[0005] In a first aspect, this application provides a standard sheet for current-voltage testing, and the standard sheet for current-voltage testing includes:

[0006] A standard sheet body;

[0007] A carrier stage, on which the standard chip body is arranged at the top for calibration of current-voltage testing.

[0008] A protective cover, at least one side of the top of which is made of a light-transmitting material. The protective cover is connected to the carrier stage and covers the standard chip body. The vertical upward projection of the standard chip body is located inside one side of the top of the protective cover, and one side of the top of the protective cover is inclined.

[0009] In one embodiment, one side of the top of the protective cover is made of an acrylic transparent plate or high-transparency glass.

[0010] In one embodiment, the inclination angle of one side of the top of the protective cover is 10 - 20 degrees.

[0011] In one embodiment, a connecting plate is arranged on the carrier stage. The protective cover includes a mounting plate, and the mounting plate is connected to the connecting plate.

[0012] In one embodiment, the connecting plate and the mounting plate are detachably connected.

[0013] In one embodiment, the connecting plate and the mounting plate are connected by a screwing member.

[0014] In one embodiment, adjusting holes are arranged on the mounting plate, and the screwing member is arranged in the adjusting holes.

[0015] In one embodiment, a plurality of adjusting holes are arranged at intervals in a direction perpendicular to the length direction thereof.

[0016] In one embodiment, the protective cover further includes end plates and a top plate. Two end plates are arranged at intervals. The mounting plate is arranged between the bottoms of the two end plates, and the top plate is arranged between the tops of the two end plates. One side of the top of the protective cover is the top plate.

[0017] In a second aspect, the present application provides a current-voltage testing system, which includes any one of the current-voltage testing standard chips provided by the present application.

[0018] In this application, a protective cover is provided on the loading platform, and the protective cover is configured such that at least one side of the top is made of a transparent material. At the same time, one side of the top of the protective cover is inclined. The standard sheet body can be protected by the protective cover to prevent dust or other sundries from falling on the standard sheet body. Meanwhile, the dust or other sundries that fall on one side of the top of the protective cover can slide off under the action of their own weight, so as to prevent the dust or other sundries from adhering to one side of the top of the protective cover and affecting the calibration function of the standard sheet body. Therefore, this application can effectively improve the problem that it is difficult to ensure the accuracy of the standard time due to the influence of dust or other impurities on the standard sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 6 is a schematic structural diagram of a standard sheet for current-voltage testing provided in Embodiment 1 of this application;

[0020] Figure 2 FIG. 10 is an exploded view of a standard sheet for current-voltage testing provided in Embodiment 1 of this application;

[0021] Figure 3 FIG. 14 is a perspective view of a standard sheet for current-voltage testing provided in Embodiment 1 of this application.

[0022] Reference numerals: 100, standard sheet body; 200, carrier table; 210, connecting plate; 300, protective cover; 310, mounting plate; 311, adjustment hole; 320, end plate; 330, top plate; 400, screw connection member; 410, screw rod; 420, nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of this application clearer, the following further elaborates on this application in conjunction with 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 used to limit this application.

[0024] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner.

[0025] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0026] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] Embodiment 1

[0028] Embodiment 1 of the present application provides a standard sheet for current-voltage testing. The standard sheet for current-voltage testing includes:

[0029] The standard sheet body 100;

[0030] The carrier table 200, and the standard sheet body 100 is arranged on the top of the carrier table 200 for calibration of current-voltage testing;

[0031] The protective cover 300, at least one side of the top of which is made of a light-transmitting material. The protective cover 300 is connected to the carrier table 200 and covers the outside of the standard sheet body 100. The projection of the standard sheet body 100 vertically upward is located inside one side of the top of the protective cover 300, and one side of the top of the protective cover 300 is inclined.

[0032] As Figure 1 and Figure 2 shown, in this embodiment, by way of example, the standard sheet body 100 can be used to calibrate the light intensity condition of current-voltage (IV) testing. It is set as a rectangle and arranged on the top of the carrier table 200. The carrier table 200 can be set in the shape of a cuboid, and the standard sheet body 100 can be fixed at the middle position on the top of the carrier table 200. Structures such as wire harnesses can be arranged on both sides in the length direction of the carrier table 200 to facilitate the connection between the wire harnesses and the standard sheet body 100.

[0033] As Figure 3As shown in the figure, the standard chip body 100 can be protected by a protective cover 300 to prevent dust or other sundries from falling on the standard chip body 100. When the protective cover 300 protects the standard chip body 100, it is covered outside the standard chip body 100. At least one side of the top of the protective cover 300 is made of a light-transmitting material, which can be understood as a material with a relatively high light transmittance for light, such as acrylic board, glass, etc. When calibrating the light intensity condition through the standard chip body 100, the light can irradiate on the standard chip body 100 through one side of the top of the protective cover 300. When the protective cover 300 is connected to the carrier 200, it is necessary to ensure that the vertical upward projection of the standard chip body 100 is located inside one side of the top of the protective cover 300; or it can be said that the vertical downward projection range of one side of the top of the protective cover 300 covers the standard chip body 100 to avoid other parts of the protective cover 300 from blocking the light.

[0034] When dust or other sundries fall, one side of the top of the protective cover can block the dust or other sundries to prevent them from falling on the standard chip body 100. In this embodiment, one side of the top of the protective cover is designed in an inclined manner. When dust or other sundries fall on one side of the top of the protective cover, the dust or other sundries can slide along one side of the top of the protective cover under the action of their own weight and are not easily attached to one side of the top of the protective cover. When there is no dust or other sundries attached to one side of the top of the protective cover, the calibration of the light intensity condition by the standard chip body 100 can be unaffected and have high accuracy.

[0035] It can be understood that in this application, by setting a protective cover 300 on the carrier table and setting the protective cover 300 to be made of a transparent material at least on one side of the top, and at the same time setting one side of the top of the protective cover 300 to be inclined, the standard chip body 100 can be protected by the protective cover 300 to prevent dust or other sundries from falling on the standard chip body 100. At the same time, the dust or other sundries that fall on one side of the top of the protective cover 300 can slide under the action of their own weight to avoid the dust or other sundries from adhering to one side of the top of the protective cover and affecting the calibration function of the standard chip body 100. Therefore, this application can effectively improve the problem that it is difficult to ensure the accuracy of the standard when the standard chip is affected by dust or other impurities.

[0036] Specifically, one side of the top of the protective cover 300 is made of an acrylic transparent board or high-transparency glass.

[0037] Such as Figure 3As shown, in this embodiment, by way of example, both the acrylic transparent plate and the highly transparent glass have a high light transmittance. When used as the substrate on one side of the top of the protective cover 300, it can reduce the influence of the standard sheet body 100 on the light reception on one side of the top of the protective cover 300, so that the standard sheet body 100 can accurately calibrate the light intensity condition for the current-voltage test.

[0038] Specifically, the inclination angle of one side of the top of the protective cover 300 is 10-20 degrees.

[0039] As Figure 2 and Figure 3 As shown, in this embodiment, by way of example, one side of the top of the protective cover 300 can be inclined along the width direction of the standard sheet body 100, and the inclination angle can be set to 10-20 degrees, such as 10, 15 or 20 degrees, etc. Compared with the way that one side of the top of the protective cover 300 is inclined along the length direction of the standard sheet body 100, this embodiment can make the protective cover 300 have a relatively large inclination angle. At this inclination angle, dust or other foreign objects are more likely to slide down on one side of the top of the protective cover 300 by their own gravity.

[0040] Specifically, a connecting plate 210 is provided on the carrier 200, and the protective cover 300 includes a mounting plate 310, and the mounting plate 310 is connected to the connecting plate 210.

[0041] As Figure 1 and Figure 2 As shown, in this embodiment, by way of example, the connecting plate 210 can be set to be rectangular, and the connecting plate 210 can be arranged on one side in the width direction of the carrier 200. The mounting plate 310 can be the bottom side of the protective cover 300. When arranging the protective cover 300 on the carrier 200, the mounting plate 310 can abut against the top side of the connecting plate 210 and be connected to the connecting plate 210.

[0042] It can be understood that in this embodiment, by providing the connecting plate 210 on the carrier 200 and connecting the mounting plate 310 of the protective cover 300 to the connecting plate 210, it is convenient to arrange the protective cover 300 on the carrier 200, so as to project the standard sheet body 100 vertically upward into the inner side of the top of the protective cover 300 to ensure the calibration function of the standard sheet body 100.

[0043] Specifically, the connecting plate 210 and the mounting plate 310 are detachably connected.

[0044] As Figure 1 and Figure 2As shown, in this embodiment, by way of example, the connection between the connecting plate 210 and the mounting plate 310 can be designed as a detachable connection. For example, the connecting plate 210 and the mounting plate 310 are connected by a pin member, or connected by a screwing member 400, or the mounting plate 310 is slidably disposed on the connecting plate 210, etc.

[0045] It can be understood that in this embodiment, by setting the connection between the connecting plate 210 and the mounting plate 310 to be detachable, when the light transmittance on one side of the top of the protective cover 300 decreases and affects the accuracy of the calibration of the light intensity condition by the standard sheet body 100, the protective cover 300 can be removed from the carrier 200 for maintenance or replacement, so as to further ensure the stable and effective protection function of the protective cover 300.

[0046] More specifically, the connecting plate 210 and the mounting plate 310 are connected by a screwing member 400.

[0047] As Figure 1 and Figure 2 shown, in this embodiment, by way of example, the screwing member 400 can be a screw rod 410 and a nut 420. The screw rod 410 can be fixed on one side of the top of the connecting plate 210, and the screw rod 410 can pass through the mounting plate 310 from bottom to top and then be threadedly connected with the nut 420. When the nut 420 is tightened, the mounting plate 310 can be locked and fixed on the connecting plate 210. When disassembling the protective cover 300, loosening and removing the nut 420 can separate the mounting plate 310 from the connecting plate 210.

[0048] Of course, in some embodiments, the screwing member 400 can also be a bolt, which can pass through the mounting plate 310 from top to bottom and be threadedly connected to the connecting plate 210. When the bolt is tightened, the mounting plate 310 can be locked and fixed on the connecting plate 210. Similarly, when disassembling the protective cover 300, loosening and removing the bolt is sufficient.

[0049] It can be understood that in this embodiment, the connecting plate 210 and the mounting plate 310 are detachably connected by the screwing member 400, which is convenient to operate, fast and efficient.

[0050] More specifically, an adjustment hole 311 is provided on the mounting plate 310, and the screwing member 400 is disposed in the adjustment hole 311.

[0051] As Figure 1 and Figure 2As shown, in this embodiment, by way of example, the adjustment hole 311 can be set as an oblong hole, and its length direction can be the width direction of the standard sheet body 100; when the screw member 400 is arranged in the adjustment hole 311, the screw member 400 is slidably arranged in the adjustment hole 311, which can enable the position of the mounting plate 310 on the connecting plate 210 to be adjustable along the width direction of the standard sheet body 100, so that the vertically downward projection range of one side of the top of the protective cover 300 covers the standard sheet body 100.

[0052] It can be understood that in this embodiment, by providing the adjustment hole 311, the position of the mounting plate 310 on the connecting plate 210 can be adjusted, so as to facilitate the protection of the standard sheet body 100 by the protective cover 300 at a specified position, and avoid the interference and occlusion of the reception of the light intensity condition by the standard sheet body 100.

[0053] More specifically, a plurality of adjustment holes 311 are arranged at intervals along a direction perpendicular to its length direction.

[0054] As Figure 1 and Figure 2 shown, in this embodiment, by way of example, the direction perpendicular to the length direction of the adjustment hole 311 is the length direction of the standard sheet body 100, and along this direction, a plurality of adjustment holes 311 are arranged at intervals; in this embodiment, 3 adjustment holes 311 are taken as an example. When the protective cover 300 is installed on the stage, the screw member 400 can be arranged in any adjustment hole 311 according to actual needs, so that the protective cover 300 is located at different installation positions, and further enables the protective cover 300 to form better protection for the standard sheet body 100.

[0055] It can be understood that in this embodiment, by setting a plurality of adjustment holes 311, the position of the protective cover 300 along the direction perpendicular to the length direction of the adjustment hole 311 can be adjusted, so that the installation position of the protective cover 300 is more accurate.

[0056] Specifically, the protective cover 300 further includes end plates 320 and a top plate 330. Two end plates 320 are arranged at intervals, the mounting plate 310 is arranged between the bottoms of the two end plates 320, the top plate 330 is arranged between the tops of the two end plates 320, and one side of the top of the protective cover 300 is the top plate 330.

[0057] As Figure 1 and Figure 2As shown, in this embodiment, by way of example, the end plates 320 can be spaced apart on both sides in the length direction of the stage. The mounting plate 310 can be disposed between the two end plates 320. The mounting plate 310 can form the bottom side of the protective cover 300, and its width can be smaller than the width of the bottom sides of the two end plates 320. The top plate 330 can be disposed between the tops of the two end plates 320 and form the top side of the protective cover 300. The top plate 330 can be made of an acrylic plate to ensure the light transmittance of the top side of the protective cover 300. The end plates 320 and the mounting plate 310 can also be made of an acrylic plate. At the same time, the connection mode of bonding and fixing can be adopted between the end plates 320 and the mounting plate 310 and the top plate 330.

[0058] It can be understood that by reasonably setting the structure of the protective cover 300 in this embodiment, it is convenient to ensure the light transmittance of the top side of the protective cover 300, and at the same time, it is convenient to arrange the protective cover 300 on the stage.

[0059] The implementation principle of a standard sheet for current-voltage testing provided in the first embodiment of the present application is as follows:

[0060] During preparation, acrylic plates of a specified shape are bonded to form the protective cover 300. Subsequently, the mounting plate 310 of the protective cover 300 is fixed to the connecting plate 210 of the stage through the screw connectors 400. During fixation, the protective cover 300 is adjusted to a specified position so that the standard sheet body 100 projects vertically upward within the top side of the protective cover 300. When adjusting the position of the protective cover 300, the screw connectors 400 are slidably disposed within the adjustment holes 311 so that the position of the mounting plate 310 on the connecting plate 210 is adjustable. When the protective cover 300 is installed in place, the protective cover 300 covers the outside of the standard sheet body 100. When dust or other sundries fall, the top side of the protective cover can block the dust or other sundries to prevent them from falling on the standard sheet body 100. And when the dust or other sundries fall on the top side of the protective cover, the dust or other sundries can slide along the top side of the protective cover under the action of their own weight and are not likely to adhere to the top side of the protective cover.

[0061] In this application, a protective cover 300 is provided on the stage, and the protective cover 300 is configured to have a structure made of a transparent material at least on one side of the top. At the same time, one side of the top of the protective cover 300 is inclined. The standard sheet body 100 can be protected by the protective cover 300 to prevent dust or other debris from falling on the standard sheet body 100. At the same time, the dust or other debris falling on one side of the top of the protective cover 300 can slide down under the action of its own weight, so as to prevent the dust or other debris from adhering to one side of the top of the protective cover and affecting the calibration function of the standard sheet body 100. Therefore, this application can effectively improve the problem that it is difficult to ensure the accuracy of the standard time due to the influence of dust or other impurities on the standard sheet.

[0062] Embodiment 2

[0063] Embodiment 2 of this application provides a current-voltage test system, and the current-voltage test system includes any one of the standard sheets for current-voltage testing provided by this application.

[0064] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0065] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

1. A standard chip for current-voltage testing, characterized in that, The standard sheet for current-voltage testing includes: A standard sheet body (100); A carrier table (200), on the top of which the standard sheet body (100) is arranged for calibration of current-voltage testing; A protective cover (300), at least one side of the top of which is made of a light-transmitting material. The protective cover (300) is connected to the carrier table (200) and covers the outside of the standard sheet body (100). The vertical upward projection of the standard sheet body (100) is located inside one side of the top of the protective cover (300), and one side of the top of the protective cover (300) is inclined.

2. The standard chip for current-voltage testing according to claim 1, characterized in that, One side of the top of the protective cover (300) is made of an acrylic transparent plate or high-transparency glass.

3. The standard chip for current-voltage testing according to claim 1, characterized in that, The inclination angle of one side of the top of the protective cover (300) is 10-20 degrees.

4. The standard chip for current-voltage test according to claim 1, characterized in that, A connecting plate (210) is arranged on the carrier table (200). The protective cover (300) includes a mounting plate (310), and the mounting plate (310) is connected to the connecting plate (210).

5. The standard chip for current-voltage testing according to claim 4, wherein The connecting plate (210) and the mounting plate (310) are detachably connected.

6. The standard chip for current-voltage testing according to claim 5, wherein The connecting plate (210) and the mounting plate (310) are connected by a screw member (400).

7. The standard wafer for current-voltage testing according to claim 6, wherein Adjusting holes (311) are arranged on the mounting plate (310), and the screw member (400) is arranged in the adjusting holes (311).

8. The standard chip for current-voltage testing according to claim 7, wherein, A plurality of the adjusting holes (311) are arranged at intervals along a direction perpendicular to their length direction.

9. The standard chip for current-voltage testing according to claim 4, wherein, The protective cover (300) further includes end plates (320) and a top plate (330). Two end plates (320) are arranged at intervals. The mounting plate (310) is arranged between the bottoms of the two end plates (320), and the top plate (330) is arranged between the tops of the two end plates (320). One side of the top of the protective cover (300) is the top plate (330).

10. A current-voltage test system, characterized in that, The current-voltage testing system includes the standard sheet for current-voltage testing according to any one of claims 1-9.

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