Testing device and testing platform for solar cell

Abstract

The utility model discloses a solar cell testing device and a testing platform, the solar cell testing device comprises a probe row slide rail and a probe row, the probe row slide rail and the probe row extend along a direction vertical to the length direction of a cell grid line; the probe row slide rail is inserted and sleeved on a fixed shaft of a test platform base in a sliding manner, the probe row comprises a sliding part and a probe part, the sliding part is arranged on the probe row slide rail in a sliding manner and can be fixed on the probe row slide rail, the probe part is connected to the sliding part, a plurality of grooves are formed in the probe part, and the probe row slide rail is arranged on the probe row slide rail in a sliding manner and can be fixed on the probe row slide rail. And the grooves are in one-to-one correspondence with the battery grid lines. According to the utility model, the thin grid lines can be prevented from being pressed and damaged during testing, and the testing requirements of the solar cell can be better met.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, specifically to a solar cell testing device and testing platform. Background Technology

[0002] With the development of solar cell technology, while the power output of solar cells has increased, their production costs have also risen. To reduce costs, gridless (OBB) cell technology has gradually emerged. OBB technology is a further upgrade of super-multiple grid (SMBB) technology, eliminating the traditional thick main grid lines and thinning the sub-grids, reducing the shading area, increasing light absorption, and ultimately improving the overall power of the solar cell. Because gridless cells use fine grid lines, if traditional probe testing methods are used, the probes will penetrate into the fine grid lines (even into the film layer) during testing, causing the measured fill factor to gradually decrease and rendering the cell unusable. Chinese patent document CN220544979U discloses a novel solar cell testing fixture that uses a strip-shaped probe array. The bottom of the probe array (the part in contact with the fine grid lines) is a metal strip (or sheet), which is pressed directly onto the fine grid lines during testing. This testing method can cause the fine grid lines to deform (especially for heterojunction cells), thus affecting the test results. Therefore, it is necessary to design a testing device for solar cells that does not damage the fine grid lines. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this utility model provides a testing device and testing platform for solar cells, which can avoid pressure and damage to the fine grid lines during testing and better meet the testing requirements of solar cells.

[0004] The specific technical solution provided by this utility model is as follows:

[0005] In a first aspect, a testing device for solar cells is provided, including a probe array slide rail and a probe array. The probe array slide rail and the probe array extend in a direction perpendicular to the length direction of the cell grid lines. The probe array slide rail is inserted into and slidably disposed on a fixed shaft of a test platform base. The probe array includes a sliding part and a probe part. The sliding part is slidably disposed on the probe array slide rail and can be fixed on the probe array slide rail. The probe part is connected to the sliding part. The probe part is provided with a plurality of grooves, and the grooves correspond one-to-one with the cell grid lines.

[0006] By employing the above technical solution, the testing device of this utility model, through the setting of a probe array slide rail and a probe array, allows for battery testing. First, the probe array slide rail is inserted onto a fixed shaft and slid along the fixed shaft to the corresponding battery grid line position. Then, the probe array slides along the probe array slide rail via a sliding part, so that the grooves on the probe part correspond one-to-one with the battery grid lines, and the battery grid lines contact the grooves. Then, the sliding part is fixed on the probe array slide rail for positioning. Finally, the probe testing of the battery can begin. During testing, due to the setting of the grooves, the probe part will not compress or damage the battery grid lines, thus better meeting the testing requirements of solar cells.

[0007] As a preferred embodiment of the above scheme, multiple probe rails and probe rows are provided, with each probe rail and probe row corresponding to the other.

[0008] As a preferred embodiment of the above scheme, the cross-section of the groove is an arc shape or a combination of an arc shape and other shapes.

[0009] As a preferred embodiment of the above solution, the probe portion corresponding to the groove on the side is provided with alignment marks for the battery grid lines.

[0010] As a preferred embodiment of the above solution, the probe array further includes an elastic element connected between the sliding portion and the probe portion.

[0011] As a preferred embodiment of the above solution, the elastic element includes multiple compression springs, with the two ends of the compression springs connected to the sliding part and the probe part, respectively.

[0012] As a preferred embodiment of the above solution, the sliding part is fixed to the probe slide rail by a first fixing member, and the first fixing member is disposed on the sliding part.

[0013] As a preferred embodiment of the above scheme, the probe slide rail is provided with through holes at both ends, and the through holes are inserted into the fixed shaft.

[0014] As a preferred embodiment of the above scheme, the probe slide rail is fixed to the fixed shaft by a second fixing member.

[0015] Secondly, a test platform is provided, including the solar cell test device and the base fixing shaft as described above, wherein the axial direction of the fixing shaft is parallel to the length direction of the cell grid lines.

[0016] Using the above technical solution, the testing platform of this utility model is used for probe testing of solar cells. During testing, the probe array slide rail is first inserted into the fixed shaft and slid on the fixed shaft to the corresponding battery grid line position. Then, the probe array slides on the probe array slide rail through the sliding part, so that the groove on the probe part corresponds one-to-one with the battery grid line and the battery grid line contacts the groove. Then, the sliding part is fixed on the probe array slide rail to achieve positioning. Finally, the probe testing of the battery can begin. During testing, due to the setting of the groove, the probe part will not press or damage the battery grid line, thus better meeting the testing requirements of solar cells. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the probe section of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model in use;

[0022] Figure 5 This is a schematic diagram of the structure of the upper test component and the lower test component of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the upper and lower test components of this utility model when they are used together;

[0024] Figure 7 for Figure 6 A partial structural diagram of a medium compression spring.

[0025] Figure 8 for Figure 6 A schematic diagram of the central groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," and "bottom," etc., used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Example 1

[0029] like Figures 1 to 4 As shown, this utility model provides a testing device for solar cells, including a probe array slide rail 1 and a probe array 2. The probe array slide rail 1 and the probe array 2 extend in a direction perpendicular to the length direction of the cell grid lines. The probe array slide rail 1 is inserted into and slidably mounted on the fixed shaft 100 of the test platform base. The probe array 2 includes a sliding part 21 and a probe part 22. The sliding part 21 is slidably mounted on the probe array slide rail 1 and can be fixed on the probe array slide rail 1. The probe part 22 is connected to the sliding part 21. The probe part 22 is provided with a plurality of grooves 221, and the grooves 221 correspond one-to-one with the cell grid lines. In this embodiment, the size of the grooves 221 and the spacing of the grooves 221 are matched with the size and spacing of the cell grid lines, respectively. The probe part 22 is made of metal material to facilitate conductivity during testing.

[0030] like Figure 4As shown, multiple probe rails 1 and probe rows 2 are provided, with each probe rail 1 and probe row 2 corresponding one-to-one. Multiple probe rails 1 are parallel to each other, and multiple probe rows 2 are also parallel to each other. In this embodiment, the first probe rail 1 is first inserted onto the fixed shaft 100 and slid to the corresponding battery grid line position. Then, the corresponding probe row 2 is positioned and fixed onto the probe rail 1. Next, the next probe rail 1 is inserted onto the fixed shaft 100 and slid to the corresponding battery grid line position. The corresponding probe row 2 is then positioned and fixed onto the probe rail 1, and so on, until all probe rows 2 are matched with the battery grid line positions. Because the current on the entire battery is very large, the probe sections 22 of multiple probe rows 2 need to be connected in parallel for testing to reduce resistance. It is also very convenient to replace or add probe rows 2 as needed during testing; simply remove or install the probe rail 1 and probe rows 2 together from the fixed shaft 100. Additionally, as... Figure 5 , Figure 6 As shown, the testing device of this utility model can be divided into an upper testing component 3 and a lower testing component 4. The upper testing component 3 and the lower testing component 4 are symmetrically arranged above and below the battery 200. Both the upper testing component 3 and the lower testing component 4 include multiple probe row slide rails 1 and probe rows 2. The probe part 22 of the upper testing component 3 is in contact with the battery grid line. The probe parts 22 of the upper testing component 3 and the lower testing component 4 are electrically connected to the testing equipment, including voltage and current testing equipment, etc. Alternatively, only the upper testing component 3 can be used for probe testing, depending on the actual testing situation.

[0031] like Figure 3 , Figure 8 As shown, the cross-section of the groove 221 is an arc shape or a combination of an arc shape and other shapes. Since the cross-section of the battery grid line is generally arc-shaped, the cross-section of the groove 221 in this embodiment is set to an arc shape (e.g., Figure 3 As shown) or a combination of arc and other shapes, where the radius of the arc matches the radius of the arc of the battery grid line to adapt to the battery grid line, resulting in good contact between the groove 221 and the battery grid line, thus improving the test results. In this embodiment, the other shapes in the combination of arc and other shapes can be rectangles (such as... Figure 8 (as shown), shapes such as squares and trapezoids.

[0032] Alignment marks 5 for battery grid lines are provided on the probe portion 22 corresponding to the groove 221 on the side. In this embodiment, alignment marks 5 for battery grid lines are provided on the probe portion 22 near the leftmost or rightmost groove 221. The alignment marks 5 are preferably colored lines (such as vertical lines). The probe row 2 slides on the probe row slide rail 1 through the sliding portion 21 so that the alignment marks 5 are aligned with the leftmost or rightmost battery grid lines on the battery, thereby making all the grooves 221 correspond one-to-one with the battery grid lines.

[0033] like Figures 5 to 7 As shown, the probe array 2 also includes an elastic element 23, which is connected between the sliding portion 21 and the probe portion 22. The elastic element 23 includes a plurality of compression springs 231, with both ends of the compression springs 231 connected to the sliding portion 21 and the probe portion 22, respectively. In this embodiment, the elastic element 23 provides elasticity and rigidity to the probe portion 22. The material and shape of the compression springs 231 are not limited; the compression springs 231 can be ordinary spring shapes or nested rectangular shapes (such as...). Figure 7 (As shown).

[0034] The sliding part 21 is fixed to the probe slide rail 1 by a first fixing member 6, which is disposed on the sliding part 21. In this embodiment, the sliding part 21 is provided with a first threaded hole (not shown), and the first fixing member 6 includes a first bolt (not shown). The first bolt is screwed into the first threaded hole. When the sliding part 21 is fixed, the first bolt is tightened so that the first bolt presses against the probe slide rail 1, thereby fixing the sliding part 21 to the probe slide rail 1.

[0035] The probe array slide rail 1 has through holes 11 at both ends, which are inserted into the fixed shaft 100. The probe array slide rail 1 is fixed to the fixed shaft 100 by a second fixing member (not shown). In this embodiment, the probe array slide rail 1 is a horizontal bar 1 perpendicular to the length direction of the battery grid lines. The horizontal bar 1 has through holes 11 at both ends, which are inserted into the fixed shaft 100 and can slide on the fixed shaft 100. The horizontal bar 1 has a second threaded hole (not shown) communicating with the through hole 11. The second fixing member includes a second bolt. When the horizontal bar 1 is fixed, the second bolt is screwed into the second threaded hole and pressed against the fixed shaft 100, thereby fixing the position of the probe array slide rail 1 and the probe array 2 on the fixed shaft 100.

[0036] The testing device of this invention can be used for probe testing of solar cells, such as IV and EL testing. During testing, firstly, the first probe array slide rail 1 is inserted onto the fixed shaft 100 and slid to the corresponding cell grid line position. Then, the second fixing member secures the probe array slide rail 1 to the fixed shaft 100, initially positioning the probe array 2. Next, the sliding part 21 slides the probe array 2 on the probe array slide rail 1, so that the grooves 221 on the probe part 22 correspond one-to-one with the cell grid lines, further positioning the probe array 2. The next probe array slide rail 1 is inserted onto the fixed shaft 100 and slid to the corresponding cell grid line position, and then the corresponding probe array 2 is positioned and fixed on the probe array slide rail 1. This process is repeated until all probe arrays 2 are matched with the cell grid line positions. Alternatively, the previous probe array can be positioned differently. After the probe array 2 is positioned on the probe array slide rail 1, the probe array slide rail 1 and the probe array 2 are removed from the fixed shaft 100 together. Then, the next probe array slide rail 1 is installed and the next probe array 2 is positioned. After the probe array 2 is individually aligned and positioned, all the probe array slide rails 1 are reinserted into the corresponding positions on the fixed shaft 100 and fixed, with the battery grid line in contact with the groove 221. This allows the probe array 2 to be individually aligned and positioned with the battery grid line, avoiding other probe array 2 from affecting the alignment line of sight and ensuring the alignment effect. Finally, the probe test of the battery 200 can be started. The probe part 22 is electrically connected to the test equipment. During the test, due to the setting of the groove 221, the probe part 22 will not press or damage the battery grid line, better meeting the test requirements of the solar cell.

[0037] Example 2

[0038] See Figure 4 This utility model provides a testing platform, including a solar cell testing device as described in Embodiment 1, a fixed shaft 100 of the base, and testing equipment. The axial direction of the fixed shaft is parallel to the length direction of the battery grid lines.

[0039] This utility model's testing platform can be used for probe testing of solar cells, such as IV and EL tests. During testing, the first probe array slide rail is first inserted onto the fixed shaft and slid to the corresponding cell grid line position. Then, the second fixing component secures this probe array slide rail to the fixed shaft, initially achieving probe array positioning. Next, the probe array slides along the slide rail using the sliding part, ensuring the grooves on the probe part correspond one-to-one with the cell grid lines, further achieving probe array positioning. The next probe array slide rail is then inserted onto the fixed shaft and slid to the corresponding cell grid line position, and the corresponding probe array is then positioned and fixed on the slide rail. This process is repeated until all probe arrays are matched to the cell grid line positions. Alternatively, the previous step can be repeated... After each probe array is positioned on the probe array slide rail, the slide rail and probe array together are removed from the fixed shaft. Then, the next probe array slide rail is installed and the next probe array is positioned. After each probe array is individually aligned and positioned, all probe array slide rails are reinserted into their corresponding positions on the fixed shaft and fixed, with the battery grid lines in contact with the grooves. This allows each probe array to be individually aligned and positioned with the battery grid lines, avoiding interference from other probe arrays and ensuring alignment effectiveness. Finally, probe testing of the battery can begin. The probe section is electrically connected to the testing equipment. During testing, due to the groove design, the probe section will not compress or damage the battery grid lines, better meeting the testing requirements of solar cells.

[0040] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0041] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A testing device for solar cells, characterized in that, The device includes a probe array slide rail and a probe array, which extend in a direction perpendicular to the length direction of the battery grid lines. The probe array slide rail is inserted into and slidably mounted on a fixed shaft of the test platform base. The probe array includes a sliding part and a probe part. The sliding part is slidably mounted on the probe array slide rail and can be fixed on the probe array slide rail. The probe part is connected to the sliding part. The probe part has multiple grooves, and each groove corresponds to a battery grid line.

2. The testing apparatus for solar cells according to claim 1, characterized in that, Multiple probe rails and probe rows are provided, and each probe rail and probe row corresponds to another probe row.

3. The testing apparatus for solar cells according to claim 1, characterized in that, The cross-sectional shape of the groove includes an arc shape.

4. The testing apparatus for solar cells according to claim 1, characterized in that, The probe portion corresponding to the groove on the side is provided with alignment marks for the battery grid lines.

5. The testing apparatus for solar cells according to claim 1, characterized in that, The probe array also includes an elastic element connected between the sliding portion and the probe portion.

6. The testing apparatus for solar cells according to claim 5, characterized in that, The elastic element includes a plurality of compression springs, the two ends of which are respectively connected to the sliding part and the probe part.

7. The testing apparatus for solar cells according to claim 1, characterized in that, The sliding part is fixed on the probe slide rail by a first fixing member, and the first fixing member is disposed on the sliding part.

8. The testing apparatus for solar cells according to claim 1, characterized in that, The probe slide rail has through holes at both ends, and the through holes are inserted into the fixed shaft.

9. The testing apparatus for solar cells according to claim 1, characterized in that, The probe slide rail is fixed to the fixed shaft by a second fixing member.

10. A testing platform, characterized in that, The device includes a test apparatus for a solar cell as described in any one of claims 1-9 and a fixing shaft for the base, wherein the axial direction of the fixing shaft is parallel to the length direction of the cell grid lines.

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