Resistance characteristic measuring device for photovoltaic cell

Abstract

The utility model discloses a photovoltaic cell resistance characteristic measuring device, which comprises a host, a measuring assembly, a test probe, a positioning frame, a shading box, an objective table and a positioning assembly, the measuring assembly is fixedly arranged at the top of the host, the test probe is fixedly arranged on the measuring assembly, the positioning frame is fixedly arranged at the front end of the measuring assembly, and the shading box is fixedly arranged on the objective table. The shading box is fixedly installed at the top of the main machine, the objective table is fixedly inserted into the shading box, a positioning block is fixedly arranged at the top end of the objective table, and the positioning assembly comprises a rotating motor fixedly arranged on the main machine, a second lead screw fixedly arranged at the output end of the rotating motor and a positioning rod in threaded connection with the second lead screw. Through the arrangement of the positioning frame, the shading box, the objective table and the positioning assembly, the automatic positioning effect is achieved under the condition that the use of the device is not affected, the measurement accuracy is high, and meanwhile through the arrangement of the fastener, the shading box is convenient to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell resistance characteristic measurement technology, specifically a photovoltaic cell resistance characteristic measurement device. Background Technology

[0002] A photovoltaic cell resistance measurement device is a key instrument for evaluating cell performance. This device needs to accurately measure the series resistance (Rs) and parallel resistance (Rsh) of the photovoltaic cell. Series resistance reflects the combined effects of internal materials, electrode contacts, and grid resistance; its increase reduces short-circuit current and fill factor. Parallel resistance characterizes leakage current; its decrease leads to a drop in open-circuit voltage. Both directly affect the cell's photoelectric conversion efficiency. The photovoltaic cell resistance measurement device requires measurements under both light and dark conditions, thus necessitating the use of a light-shielding structure and a drawer-type stage. Measurement requires aligning the photovoltaic cell and placing it correctly on the stage, followed by moving the stage. This process is time-consuming and labor-intensive, and the photovoltaic cell is prone to displacement during movement, leading to measurement errors. Therefore, we propose a photovoltaic cell resistance measurement device. Utility Model Content

[0003] The present invention aims to solve the problems existing in the prior art or related technologies.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a photovoltaic cell resistance characteristic measuring device, including a main unit, a measuring component, a test probe, a positioning frame, a light-shielding box, a stage, and a positioning component. The measuring component is fixedly installed on the top of the main unit, the test probe is fixedly installed on the measuring component, the positioning frame is fixedly installed at the front end of the measuring component, the light-shielding box is fixedly installed on the top of the main unit, the stage is fixedly inserted into the light-shielding box, and a positioning block is fixedly installed at the top of the stage. The positioning component includes a rotary motor fixedly installed on the main unit, a second lead screw fixedly installed at the output end of the rotary motor, and a positioning rod threadedly connected to the second lead screw.

[0005] Preferably, the measuring component includes a support base fixedly mounted on the top of the host, a drive motor fixedly mounted on the top of the support base, a first lead screw fixedly connected to the output end of the drive motor, and a movable rod threadedly connected to the first lead screw.

[0006] Preferably, a plurality of pads are fixedly provided on the outside of the light-shielding box, and each of the pads is provided with a mounting hole. The front end of the light-shielding box is provided with an insertion hole for mounting a platform.

[0007] Preferably, a handle is fixedly provided at the front end of the platform, and a first rounded corner and a second rounded corner are provided at the corners of the platform.

[0008] Preferably, the outer sides of the left and right portions of the second lead screw are provided with two external threads in different directions.

[0009] Preferably, there are two positioning rods, which are symmetrically distributed.

[0010] Preferably, it also includes fasteners, which include a column fixedly disposed at the top of the host and a fastening block rotatably connected to the column.

[0011] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows: The platform set in this utility model can be pulled out or pushed forward. During the pushing process, the front and rear positions of the photovoltaic cells can be determined by the cooperation of the positioning block and the positioning frame. The rotating motor of the positioning component can be operated. The rotating motor can drive the two positioning rods to move closer and closer through the second lead screw, thereby determining the left and right positions of the photovoltaic cells and achieving the effect of automatic positioning. This eliminates the trouble of alignment and placement, improves measurement efficiency, and avoids the problem of measurement errors caused by the displacement of photovoltaic cells during movement. The accuracy is high. At the same time, the fastening block of the fastener can be rotated. When the fastening block is facing the mounting hole, the shim can be moved upward directly to disengage from the fastener, and the light-shielding box can be disassembled for maintenance or cleaning of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the host computer and positioning components;

[0014] Figure 3 This utility model Figure 1 Schematic diagram of the positioning frame;

[0015] Figure 4 This utility model Figure 1 Schematic diagram of the structure of the medium-sized light-shielding box;

[0016] Figure 5 This utility model Figure 1 Schematic diagram of the structure of the stage;

[0017] Figure 6 This utility model Figure 1 A schematic diagram of the internal structure of a medium fastener.

[0018] Figure label:

[0019] 100. Host computer;

[0020] 200. Measuring component; 201. Support base; 202. Drive motor; 203. First lead screw; 204. Moving rod;

[0021] 300. Test probe;

[0022] 400. Positioning frame;

[0023] 500, Light-shielding box; 501, Gasket; 502, Mounting hole; 503, Insertion hole;

[0024] 600. Stage; 601. Handle; 602. Positioning block; 603. First fillet; 604. Second fillet;

[0025] 700. Positioning assembly; 701. Rotary motor; 702. Second lead screw; 703. Positioning rod;

[0026] 800, Fastener; 801, Column; 802, Fastening block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] The following describes some embodiments of the present invention with reference to the accompanying drawings, providing a photovoltaic cell resistance characteristic measuring device.

[0029] Example 1:

[0030] Reference Figure 1-5 This is the first embodiment of the present invention. This embodiment provides a photovoltaic cell resistance characteristic measuring device, including a main unit 100, a measuring component 200, a test probe 300, a positioning frame 400, a light-shielding box 500, a stage 600, and a positioning component 700.

[0031] Specifically, the measuring component 200 is fixedly mounted on the top of the host 100. The measuring component 200 includes a support base 201 fixedly mounted on the top of the host 100, a drive motor 202 fixedly mounted on the top of the support base 201, a first lead screw 203 fixedly connected to the output end of the drive motor 202, and a moving rod 204 threadedly connected to the first lead screw 203. In use, the support base 201 can support and fix the drive motor 202 and the first lead screw 203, and the drive motor 202 can push the moving rod 204 to move vertically up and down through the first lead screw 203 so as to drive the test probe 300 to detect the photovoltaic cell.

[0032] Specifically, the test probe 300 is fixedly mounted on the measurement component 200. In use, the test probe 300 is a four-pin probe, and the resistance characteristics of the photovoltaic cell can be measured through the test probe 300.

[0033] Specifically, the positioning frame 400 is fixedly installed at the front end of the measuring component 200. In use, the positioning frame 400 can block the photovoltaic cells so as to automatically correct the position of the photovoltaic cells.

[0034] Specifically, the light-shielding box 500 is fixedly installed on the top of the main unit 100. Several pads 501 are fixedly provided on the outside of the light-shielding box 500. Each pad 501 has a mounting hole 502. The front end of the light-shielding box 500 has an insertion hole 503 for mounting the stage 600. In use, the light-shielding box 500 can block light so that measurements can be taken in the dark. The pads 501 can increase the contact area between the bottom of the light-shielding box 500 and the main unit 100 so as to install and remove the light-shielding box 500. Then, the stage 600 can be easily installed through the insertion hole 503.

[0035] Specifically, the stage 600 is fixedly inserted inside the light-shielding box 500. A positioning block 602 is fixedly installed at the top of the stage 600, and a handle 601 is fixedly installed at the front end of the stage 600. A first rounded corner 603 and a second rounded corner 604 are provided at the corners of the stage 600. In use, photovoltaic cells can be placed on the stage 600 for measurement, and the positioning block 602 can block the photovoltaic cells for positioning. Then, the handle 601 facilitates the movement of the stage 600. Afterward, the first rounded corner 603 facilitates the movement of the positioning rod 703 to the top of the stage 600, and the second rounded corner 604 facilitates the movement of the positioning frame 400 to the top of the stage 600.

[0036] Specifically, the positioning component 700 includes a rotary motor 701 fixedly mounted on the host 100, a second lead screw 702 fixedly mounted on the output end of the rotary motor 701, and a positioning rod 703 threadedly connected to the second lead screw 702. The outer sides of the left and right parts of the second lead screw 702 are provided with two external threads in different directions. There are two positioning rods 703, which are symmetrically distributed. In use, the rotary motor 701 can push the two positioning rods 703 away from or towards each other through the second lead screw 702. The two positioning rods 703 that are close together can correct the position of the photovoltaic cell for positioning. The two external threads in different directions make it convenient for the two positioning rods 703 to clamp the photovoltaic cell.

[0037] Example 2:

[0038] Reference Figure 1 and Figure 6This is the second embodiment of the present invention, which differs from the first embodiment in that it also includes a fastener 800. The fastener 800 includes a column 801 fixedly installed on the top of the main unit 100 and a fastening block 802 rotatably connected to the column 801. In use, the gasket 501 can be inserted into the column 801 by cooperating with the fastening block 802 and the mounting hole 502. After insertion, the fastening block 802 can be rotated to block the gasket 501 so as to install the light shield 500. At the same time, the light shield 500 can be disassembled for maintenance or cleaning of the device.

[0039] The working principle and usage process of this utility model are as follows: First, pull out the platform 600, then place the photovoltaic cell on the platform 600. Next, push the platform 600 into the light-shielding box 500. During this pushing process, the positioning frame 400 and positioning block 602 can block the photovoltaic cell, thus determining its front and rear position. Then, the rotating motor 701 of the positioning component 700 can be controlled to operate. The rotating motor 701, through the second lead screw 702, drives the two positioning rods 703 to continuously approach each other. The approaching positioning rods 703 will push the photovoltaic cell until it reaches the measurement position, thus determining its front and rear position. When the light-shielding box 500 needs to be disassembled, the fastening block 802 of the fastener 800 can be rotated until the fastening block 802 is aligned with the mounting hole 502. Then, the light-shielding box 500 is moved upwards. The moving light-shielding box 500 will cause the gasket 501 to disengage from the fastening block 802, thus allowing the light-shielding box 500 to be disassembled.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for measuring the resistance characteristics of photovoltaic cells, characterized in that, include: Host (100); The measuring component (200) is fixedly mounted on the top of the main unit (100); The test probe (300) is fixedly mounted on the measurement assembly (200); The positioning frame (400) is fixedly installed at the front end of the measuring component (200); A light-shielding box (500) is fixedly installed on the top of the main unit (100); A stage (600) is fixedly inserted inside the light-shielding box (500), and a positioning block (602) is fixedly provided on the top of the stage (600); The positioning assembly (700) includes a rotary motor (701) fixedly mounted on the host (100), a second lead screw (702) fixedly mounted on the output end of the rotary motor (701), and a positioning rod (703) threadedly connected to the second lead screw (702).

2. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, The measuring component (200) includes a support base (201) fixedly mounted on the top of the host (100), a drive motor (202) fixedly mounted on the top of the support base (201), a first lead screw (203) fixedly connected to the output end of the drive motor (202), and a moving rod (204) threadedly connected to the first lead screw (203).

3. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, The light-shielding box (500) has several gaskets (501) fixedly installed on its outer side. Each of the gaskets (501) has a mounting hole (502). The front end of the light-shielding box (500) has an insertion hole (503) for mounting a platform (600).

4. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, The front end of the platform (600) is fixedly provided with a handle (601), and the corners of the platform (600) are provided with a first rounded corner (603) and a second rounded corner (604).

5. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, The second lead screw (702) has two external threads in different directions on the outer sides of its left and right sides.

6. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, There are two positioning rods (703), and the two positioning rods (703) are symmetrically distributed.

7. The photovoltaic cell resistance characteristic measuring device according to claim 1, characterized in that, It also includes fasteners (800), which include a column (801) fixedly disposed at the top of the host (100) and a fastening block (802) rotatably connected to the column (801).

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