CN202486280U - Photovoltaic cell four-probe five-point synchronous test bench - Google Patents

Abstract

The utility model discloses a four-probe five-point synchronous test platform for photovoltaic cells, which comprises a fixed frame, an object stage, and a lifting platform controlled by a lifting mechanism on the fixed frame, and a housing is arranged outside the fixed frame , the stage is arranged at the lower part of the casing and the stage can be drawn out relative to the casing, and the lifting platform is provided with five four-probe test probes above the stage, and the five four-probe test probes The probe is set corresponding to the four corners and the center of the photovoltaic cell; the utility model can measure the parameters of five sample points of the cell at one time, and the operation is simple and the work efficiency is improved.

Description

Photovoltaic cell four-probe five-point synchronous test bench

technical field

The utility model relates to a four-probe and five-point synchronous test platform for photovoltaic cells.

Background technique

The four-probe test bench for photovoltaic cells is a key component of the sheet resistance test of photovoltaic cells. The lifting mechanism controls the lifting platform. The existing lifting platform is generally equipped with a single four-probe test probe. The four-probe test probe completes the contact between the four-probe test probe and the cell under the action of the lifting mechanism. or separation. When the four-probe test probe is in contact with the cell, the photovoltaic cell four-probe test bench passes a constant current through the current probe of the test probe in the cell, and detects the step voltage drop in the cell through the voltage probe. Finally calculate and display the sheet resistance value of the cell.

However, the existing four-probe test bench for photovoltaic cells also has the following defects during use:

1. According to the process requirements, each cell test point is typically five points. Using the existing single-probe test bench, only one parameter can be tested each time the probe is depressed, and the multi-point test must be repeated many times. "Probe lift-move sample The process of "point selection-press-test" is cumbersome and the work efficiency is low.

, According to the process requirements, the test of the diffused cell should have light-shielding conditions, but the existing four-probe test bench for photovoltaic cells does not have light-shielding conditions, which will affect the accuracy and stability of the test data.

Contents of the invention

The purpose of the utility model is to provide a four-probe and five-point synchronous test platform for photovoltaic cells, which can simultaneously complete the contact or separation of five four-probe test probes and five sample points of the cell under the action of the lifting mechanism , the parameters of five sample points of the cell can be measured at one time, the operation is simple and the work efficiency is improved; in addition, the setting of the shell can make the cell have light-shielding conditions during the test, avoiding the influence of light on the test data. accuracy and stability.

The technical scheme of the utility model is: a four-probe five-point synchronous test platform for photovoltaic cells, including a fixed frame, a loading platform, and a lifting platform controlled by a lifting mechanism on the fixed frame. There is a casing, the stage is arranged at the lower part of the casing and the stage can be drawn out relative to the casing, and the lifting platform is provided with five four-probe test probes above the stage, and the five four-probe test probes are Probe test probes are set corresponding to the four corners and the center of the photovoltaic cell.

Further, the front side of the housing is provided with five channel switching switches respectively corresponding to five four-probe test probes, and an online socket for electrical connection with the four-probe tester. When testing parameters, check the point number according to the relationship between the test point position and number, and switch the point to be tested through the channel switching switch. The test parameters are read out by the display of the four-probe tester.

In order to facilitate the operator to determine the placement position of the photovoltaic cell, a battery accommodating area is provided on the stage, and five test points corresponding to the four-probe test probes are marked in the battery accommodating area. In this way, when the photovoltaic cell needs to test the classic five sample points, it only needs to place the photovoltaic cell correspondingly in the battery accommodation area; if it needs to measure other points, it only needs to move the battery properly back and forth, left and right.

The specific structure of the fixed frame and the installation method of the lifting platform are as follows: the fixed frame is composed of an upper connecting plate, a lower connecting plate and two guide rods arranged between the upper and lower connecting plates, the two sides of the lifting platform are It has a guide sleeve that is slidably fitted with the guide rod.

Described elevating mechanism can be manual elevating mechanism, also can be electric elevating mechanism, because the elevating mechanism is of a great variety, the utility model will not be described in detail.

The utility model has the advantages of:

1. Under the action of the lifting mechanism, the utility model can simultaneously complete the contact or separation between five four-probe test probes and five sample points of the battery sheet, and can measure the parameters of the five sample points of the battery sheet at one time. Simple and improves work efficiency.

, The utility model is equipped with an external casing, so that the battery sheet has a light-shielding condition during the test, and avoids the accuracy and stability of the test data being affected by the light.

. In the utility model, the loading platform is designed as a pull-out structure, which facilitates the placement of the cells on the loading platform, and also ensures the light-shielding effect during the test.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the back view of the utility model; (the four-probe test probe is not drawn)

Fig. 2 is a side view of the utility model;

Fig. 3 is a top view of the object stage of the present invention.

Among them: 1 fixed frame; 2 loading platform; 3 lifting mechanism; 4 housing lifting platform; 5 housing; 6 four-probe test probe; 7 battery accommodation area; 8 test points; plate; 11 guide rod; 12 guide sliding sleeve; 13 channel switching switch; 14 online socket; 15 wrench assembly; 16 screw rod; 17 positioning nut.

Detailed ways

Embodiment: As shown in Figure 1 and Figure 2, a four-probe five-point synchronous test bench for photovoltaic cells includes a housing 5, and the rear part of the inner cavity of the housing 5 is provided with a fixing frame 1, and the fixing frame 1 There is a lifting table 4 that can be lifted, and the lifting table 4 is controlled by the lifting mechanism 3 on the fixed frame 1. The lower part of the inner cavity of the housing 5 is provided with a pull-type loading table 2. The stage 4 is provided with five four-probe test probes 6 above the object stage 2, and the five four-probe test probes 6 are arranged correspondingly to the four corners and the center of the photovoltaic cell.

Further, five channel switching switches 13 respectively corresponding to five four-probe test probes 6 are provided on the front side of the housing 5 , and an online socket 14 for electrical connection with a four-probe tester. When testing parameters, compare the test point position and numbering relationship, select to view the point number, switch the point when the test needs to be switched by the channel switch 13, and the test parameter is read out by the display of the four-probe tester.

In order to facilitate the operator to determine the placement position of the photovoltaic cell, the carrier 2 is provided with a battery accommodating area 7, and five test points 8 corresponding to the four-probe test probe 6 are marked in the battery accommodating area 7 . In this way, when the photovoltaic battery needs to test the classic five sample points, it is enough to place the photovoltaic battery correspondingly in the battery accommodation area 7; if other points need to be measured, it is enough to move the battery back and forth, left and right, as shown in the figure 3.

In this embodiment, the specific structure of the fixed frame 1 and the installation method of the lifting platform 4 are as follows: the fixed frame 1 is composed of an upper connecting plate 9, a lower connecting plate 10, and There are two guide rods 11 in the middle, and the two sides of the lifting table 4 have guide sleeves 12 that are slidably matched with the guide rods 11, as shown in Fig. 1 and Fig. 2 .

The lifting mechanism 3 can be a manual lifting mechanism or an electric lifting mechanism. In this embodiment, a manual lifting mechanism is exemplified, as shown in FIG. The wrench assembly 15 outside the housing 5 and a longitudinally extending screw rod 16 controlled by the wrench assembly 15 to lift up and down. And when it is opened backward, the wrench assembly 15 drives the screw rod 16 to move up, that is, the lifting platform 4 and the four-probe test probe 6 are lifted up synchronously; Moving down, that is, the lifting platform 4 and the four-probe test probe 6 are pressed down synchronously.

Under the action of the lifting mechanism 3, the utility model can simultaneously complete the contact or separation of five four-probe test probes 6 and five sample points of the battery sheet, and can measure the parameters of the five sample points of the battery sheet at one time, and the operation Simple and improves work efficiency. In addition, the setting of the casing can make the cells have light-shielding conditions during the test, avoiding the influence of light on the accuracy and stability of the test data.

The above are only specific application examples of the utility model, and do not constitute any limitation to the protection scope of the utility model. In addition to the above-mentioned embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the utility model.

Claims (4)

1. A four-probe five-point synchronous test platform for photovoltaic cells, including a fixed frame (1), a loading platform (2), and a lifting platform controlled by a lifting mechanism (3) on the fixed frame (1) ( 4), characterized in that: the fixed frame (1) is provided with a casing (5), the stage (2) is set at the lower part of the casing (5) and the stage (2) can be opposite The casing (5) is pulled out, and the lifting platform (4) is provided with five four-probe test probes (6) above the object platform (2), and the five four-probe test probes (6) are connected with the photovoltaic cell The four corners and the center correspond to the settings. 2. A four-probe five-point synchronous test platform for photovoltaic cells according to claim 1, characterized in that five four-probe test probes ( 6) The corresponding channel switching switch (13), and the online socket (14) for electrical connection with the four-probe tester. 3. A four-probe five-point synchronous test platform for photovoltaic cells according to claim 1 or 2, characterized in that: the loading platform (2) is provided with a battery accommodation area (7), and the battery There are five test points (8) corresponding to the four-probe test probe (6) marked in the accommodation area (7). 4. A four-probe five-point synchronous testing platform for photovoltaic cells according to claim 1 or 2, characterized in that: the fixing frame (1) is composed of an upper connecting plate (9) and a lower connecting plate (10) and two guide rods (11) arranged between the upper and lower connecting plates (9, 10), the two sides of the lifting platform (4) have guide sleeves (12) that slide and fit with the guide rods (11) .

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