Photovoltaic sheet resistance tester

Abstract

The utility model provides a photovoltaic sheet resistance tester, which comprises a base, a probe plate, a mounting plate and a control box, the probe plate slidably connected with the base is arranged above the base, the mounting plate is provided with at least five probes and is arranged on the rear side of the probe plate, and the probe plate is provided with plugging holes in one-to-one correspondence with the probes; the probe is provided with four probes which are slidably connected with the probe, the probes are used for being in contact with a sample to collect test data, elastic parts are arranged on the probes, the probes are in elastic contact collection through the elastic parts and keep constant contact force with the sample during collection, the control box is arranged on one side of the base, and a data processing module is arranged in the control box and can process the test data. The device has the advantages of being stable and accurate in testing, high in testing precision, wide in measuring range and good in flexibility.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic sheet resistance testing, in particular to a photovoltaic sheet resistance tester. Background Art

[0002] The cell is the core component of a photovoltaic solar cell. The performance of the cell will directly affect the performance such as the conversion rate of the cell. Therefore, during the production process of solar cells, it is necessary to monitor the performance of the cell. Among them, the sheet resistance value of the cell is a parameter that needs to be tested.

[0003] At present, the sheet resistance testing methods are mainly divided into two categories: contact type and non-contact type. Among them, non-contact eddy current measurement combines the thin-film resistivity of the substrate and the resistivity of the surface layer for measurement, resulting in unstable measurement results. The contact type generally uses a probe to contact the sample for testing. When the existing probe contacts the sample, the contact force with the sample is unstable, resulting in unstable detection results and affecting the detection accuracy. Content of the Utility Model

[0004] The utility model aims to provide a photovoltaic sheet resistance tester to overcome the deficiencies existing in the prior art.

[0005] To solve the above technical problems, the technical solution of the utility model is: a photovoltaic sheet resistance tester, including a base, a probe board, a mounting board, and a control box. A probe board slidably connected to the base is provided above the base. The mounting board is arranged behind the probe board, and at least five probes are provided thereon. Plugging holes corresponding to the probes one by one are provided on the probe board. Four probes slidably connected to the probes are provided on the probes. The probes are used to contact the sample to collect test data, and elastic members are provided thereon. The probes collect data through elastic contact via the elastic members. The control box is arranged on one side of the base and is electrically connected to the probes. A data processing module is provided in the control box to process the test data.

[0006] Further, in the above photovoltaic sheet resistance tester, nine probes are provided and arranged in a "field" shape.

[0007] Further, in the above photovoltaic sheet resistance tester, the elastic member is a spring or a spring piece.

[0008] Further, in the above photovoltaic sheet resistance tester, a wear-resistant member is further provided outside the probe, and the wear-resistant member is arranged close to the elastic member. Preferably, the wear-resistant member is made of ruby.

[0009] Further, in the above photovoltaic sheet resistance tester, the probe board is installed on a fixed bottom plate, and reinforcing plates connecting the two are further provided on both sides of the probe board and the fixed bottom plate. A linear module driven by a servo motor is provided on the base, and the output end of the linear module is connected to the fixed bottom plate. The probe board is slidably connected to the base through the linear module.

[0010] Further, the photovoltaic sheet resistance tester has a probe guard on the front side of the probe plate, and a protection cover is further arranged on the rear side of the mounting plate, a test signal adapter plate is arranged in the protection cover, and the test signal adapter plate is electrically connected with each probe.

[0011] Further, the photovoltaic sheet resistance tester has a motor driver and a power supply arranged on one side of the data processing module.

[0012] Further, the photovoltaic sheet resistance tester has a heat dissipation fan arranged on the side plate on one side of the control box.

[0013] Further, the photovoltaic sheet resistance tester has a test signal connector arranged on the side plate on one side of the control box, the test signal connector is electrically connected with the test signal adapter plate through a cable, and the test signal connector is electrically connected with the data processing module.

[0014] Further, the photovoltaic sheet resistance tester has a communication interface arranged on the side plate on one side of the control box, and the communication interface is in communication connection with a server.

[0015] Compared with the prior art, the photovoltaic sheet resistance tester has higher resolution, good precision, long-term stability, wider measurement range and lower cost, and adopts a 5 / 9 multi-point test mode, has wide test range and good flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 Fig. 1 is a structural schematic view of a photovoltaic sheet resistance tester according to the present application;

[0018] Figure 2 Fig. 1 is a structural schematic view of a photovoltaic sheet resistance tester according to the present application;

[0019] Figure 3 Fig. 1 is a structural schematic view of a photovoltaic sheet resistance tester according to the present application;

[0020] In the figure: 1. Base; 2. Probe board; 3. Mounting board; 4. Control box; 5. Probe head; 6. Probe; 7. Data processing module; 8. Fixed bottom plate; 9. Reinforcement plate; 10. Linear module; 11. Probe shield; 12. Protective cover; 13. Test signal transfer board; 14. Motor driver; 15. Power supply; 16. Cooling fan; 17. Test signal connector; 18. Communication interface. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. [[ID=⑥]] [[ID=⑦]]

[0022] [[ID=⑧]]Embodiment 1 [[ID=⑨]] [[ID=⑩]]

[0023] [[ID=⑪]]As [[ID=⑫]] Figures 1-3 "[[ID=⑬]]shown, a photovoltaic sheet resistance tester includes a base 1, a probe board 2, a mounting board 3, and a control box 4. A probe board 2 slidably connected thereto is provided above the base 1. The mounting board 3 is arranged behind the probe board 2, and at least five probe heads 5 are provided thereon. Plugging holes corresponding to the probe heads 5 one by one are provided on the probe board 2. When installing the probe heads 5, first install the probe heads 5 on the mounting board 5 and then connect them to the probe board 2, which is convenient for the installation and replacement of the probe heads 5. Four probes 6 slidably connected thereto are provided on the probe head 5. The probes 6 are used to contact the sample to collect test data, and elastic members are provided thereon. The probes elastically contact and collect through the elastic members, and maintain a constant contact force with the sample during collection, ensuring stable detection and improving detection accuracy. The control box 4 is arranged on one side of the base 1 and is electrically connected to the probe head 5. A data processing module 7 is provided in the control box 4, which can process the test data collected by the probe head 5. [[ID=⑭]] [[ID=⑮]]

[0024] [[ID=⑯]]Specifically, as [[ID=⑰]] Figure 2 [[ID=⑱]]shown, nine probe heads 5 are provided and arranged in a "field" shape. At present, the sheet resistance tester of the present invention has two test modes: 5-point and 9-point. In the 5-point mode, the four corner points and the center point of the "field" are selected. The number of points can be selected according to the size of the sample or the test requirements. When the number of points is reduced, the test time is shortened. [[ID=⑲]] [[ID=⑳]]

[0025] [[ID=㉑]]Compared with non-contact eddy current testing, the present invention has higher resolution, good accuracy, long-term stability, and a wider measurement range. Moreover, the cost is reduced, the accuracy is high, a 5 / 9 multi-point test mode is adopted, the test range is wide, and the flexibility is good. Since the probes are elastically loaded, when the probes contact the sample, the probes will compress, and a constant contact force is controlled to be generated, thereby ensuring the stability and accuracy of the test results. [[ID=㉒]]

[0026] The elastic member is a spring or a spring sheet, and is selected according to the size and shape of the probe, and the probe is further provided with a wear-resistant member, which is arranged close to the elastic member and can be made of a ruby sheet to reduce the wear of the probe.

[0027] As shown in Figure 1 , 2 , the probe plate 2 is mounted on the fixed bottom plate 8, and the probe plate 2 and the two sides of the fixed bottom plate 8 are further provided with the reinforcing plates 9 connected therebetween, so that the structural strength is good; the base 1 is provided with a linear module 10 driven by a servo motor, the output end of the linear module 10 is connected with the fixed bottom plate 8, and the probe plate 2 is slidably connected with the base 1 through the linear module 10. During detection, the linear module 10 drives the probe plate 2 to approach the sample, and is reset after detection.

[0028] Example 2

[0029] Based on the structure of Example 1, as shown in Figure 1 , 2 , the probe plate 2 is provided with a probe shield 11 on the front side, which is removed during detection and mounted during non-detection, so as to protect the probe 6, and the mounting plate 3 is further provided with a protective cover 12 on the rear side, the protective cover 12 is provided with a test signal adapter plate 13, and the test signal adapter plate 13 is electrically connected with each probe 5.

[0030] As shown in Figure 2 , 3 , the side plate on one side of the control box 4 is further provided with a test signal connector 17, the test signal connector 17 is electrically connected with the test signal adapter plate 13 through a cable, and the test signal connector 17 is electrically connected with the data processing module 7. The data detected by the probe 6 on the probe 5 is transmitted to the data processing module 7 through the test signal adapter plate 13 and the test signal connector 17.

[0031] As shown in Figure 2 , 3 , the side plate on one side of the control box 4 is further provided with a communication interface 18, and the communication interface 18 is in communication connection with a service end. After receiving and processing data, the data processing module 7 transmits the processed data to the service end through the communication interface 18, the service end can be a computer or an industrial computer, a touch screen and the like of an automatic test device, and the service end directly displays the test results in the form of a data table or a data graph. The utility model transmits test data through TCP / IP, can seamlessly dock various automatic manufacturers, and supports various transmission modes such as PLC / LAN / MES and the like.

[0032] As shown in Figure 3 , the control box 4 is further provided with a motor driver 14 and a power supply 15, and the motor driver 14 and the power supply 15 are arranged side by side on one side of the data processing module 7.

[0033] As shown in Figure 2 、 3 The control box 4 side of the side plate is also provided with a cooling fan 16, which can ensure the stable operation of the electrical components in the control box 4.

[0034] The utility model discloses an online four-probe square resistance meter designed for photovoltaic process monitoring, which can quickly and automatically scan a sample of 230mmx230mm to obtain square resistance / resistivity distribution information of different positions of the sample, and is widely praised by automatic manufacturers and customers for its high precision and flexible design.

[0035] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalency of the claims are embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A photovoltaic sheet resistance tester, characterized in that: It includes a base, a probe board, a mounting board, and a control box. Above the base, there is a probe board slidably connected thereto. The mounting board is arranged behind the probe board, and there are at least five probes thereon. There are insertion holes corresponding to the probes one by one on the probe board. Four probes are slidably connected to the probe, and the probes are used to contact the sample to collect test data. There is an elastic member thereon, and the probes elastically contact and collect through the elastic member. The control box is arranged on one side of the base and is electrically connected to the probes. There is a data processing module in the control box, which can process the test data.

2. The photovoltaic sheet resistance tester according to claim 1, characterized in that: There are nine probes, arranged in a "field" shape.

3. The photovoltaic sheet resistance tester according to claim 1, characterized in that: The elastic member is a spring or a spring sheet.

4. The photovoltaic sheet resistance tester according to claim 3, characterized in that: There is also a wear-resistant member outside the probe, and the wear-resistant member is arranged close to the elastic member.

5. The photovoltaic sheet resistance tester according to claim 1, characterized in that: The probe board is installed on a fixed bottom plate, and there are also reinforcing plates connecting the two sides of the probe board and the fixed bottom plate. There is a linear module driven by a servo motor on the base, and the output end of the linear module is connected to the fixed bottom plate. The probe board is slidably connected to the base through the linear module.

6. The photovoltaic sheet resistance tester according to claim 1, characterized in that: There is a probe shield on the front side of the probe board, and there is also a protective cover on the rear side of the mounting board. There is a test signal transfer board in the protective cover, and the test signal transfer board is electrically connected to each probe.

7. The photovoltaic sheet resistance tester according to claim 1, characterized in that: There is also a motor driver and a power supply in the control box, and the motor driver and the power supply are arranged side by side on one side of the data processing module.

8. The photovoltaic sheet resistance tester according to claim 1, characterized in that: There is also a cooling fan on the side plate of one side of the control box.

9. The photovoltaic sheet resistance tester according to claim 6, characterized in that: There is also a test signal connector on the side plate of one side of the control box. The test signal connector is electrically connected to the test signal transfer board through a cable, and the test signal connector is electrically connected to the data processing module.

10. The photovoltaic sheet resistance tester according to claim 1 or 9, characterized in that: There is a communication interface on the side plate of one side of the control box, and the communication interface is communicatively connected to the server.

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