Solar cell detection mechanism
By setting a higher density of second probes in the solar cell testing mechanism to contact the short connecting lines at the edge of the cell, the problem of positional offset during the testing of gridless solar cells was solved, resulting in higher contact accuracy and product yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-27
AI Technical Summary
During the testing process, gridless solar cells are prone to positional shifts, making it difficult for the probe to accurately contact the short connection line. This can lead to poor local contact and inconsistent brightness of the photovoltaic module's electroluminescence (EL), thus reducing product yield.
A solar cell detection mechanism is designed, which uses a higher density second probe to contact the short connecting lines at the edge of the cell. The second probe unit is densified on the support to ensure stable contact, and a lower density first probe is used in the middle area to contact the fine grid lines. The probe arrangement is optimized to adapt to cell offset.
This improves the contact accuracy between the second probe and the short connection line of the solar cell, reduces local contact defects, lowers the risk of inconsistent EL brightness in photovoltaic modules, and improves product yield.
Smart Images
Figure CN224054224U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic technology field especially relates to a solar cell detection mechanism. BACKGROUND
[0002] At present, the solar cell without main grid can improve the power generation efficiency of the solar cell without main grid and save the cost of paste, so the solar cell without main grid is favored by people in recent years.
[0003] The solar cell without main grid has a plurality of fine grid lines and a plurality of short connecting lines, the short connecting lines are located at the edge position of the cell sheet, and the short connecting lines are connected with the fine grid lines at the edge of the cell sheet to realize the gathering and transmission of current. In the process of solar cell transmission, the solar cell is prone to position deviation, so that the probe in the solar cell detection mechanism is difficult to accurately press on the short connecting line of the solar cell when detecting by using the solar cell detection mechanism, thereby causing the local poor contact phenomenon of the solar cell, and the risk of inconsistent EL (Electro Luminescence) brightness of the assembly end, reducing the product yield.
[0004] Therefore, it is urgent to design a solar cell detection mechanism to solve the above technical problems. INVENTION CONTENTS
[0005] The utility model discloses a solar cell detection mechanism, which can improve the contact accuracy of the second probe and the short connecting line of the cell sheet, reduce or avoid the local poor contact phenomenon of the cell sheet, reduce or avoid the risk of inconsistent EL brightness of the photovoltaic assembly, and improve the product yield.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] The utility model provides a solar cell detection mechanism, which comprises:
[0008] The support comprises a second probe unit at both ends thereof in the length direction of the support, and a first probe unit between the two second probe units;
[0009] The first probe unit has a plurality of rows of first probe rows, each row of first probe rows having a plurality of first probes; the second probe unit has a plurality of rows of second probe rows, each row of second probe rows having a plurality of second probes;
[0010] The spacing between adjacent two second probes is smaller than the spacing between adjacent two first probes.
[0011] As an optional technical scheme of the solar cell detection mechanism, the cross-sectional area of the contact end of the first probe with the cell is greater than the cross-sectional area of the contact end of the second probe with the cell.
[0012] As an optional technical scheme of the solar cell detection mechanism, the number of the second probe rows is greater than the number of the first probe rows.
[0013] As an optional technical scheme of the solar cell detection mechanism, the length of the first probe unit is greater than the length of the second probe unit.
[0014] As an optional technical scheme of the solar cell detection mechanism, the first probes in adjacent two rows of the first probe rows are arranged in a staggered manner, and the second probes in adjacent two rows of the second probe rows are arranged in a staggered manner.
[0015] As an optional technical scheme of the solar cell detection mechanism, the first probes in adjacent two rows of the first probe rows are arranged in a staggered manner and are tangent to each other, and the second probes in adjacent two rows of the second probe rows are arranged in a staggered manner and are tangent to each other.
[0016] As an optional technical scheme of the solar cell detection mechanism, the cross-sectional area of the contact end of the first probe with the cell is twice the cross-sectional area of the contact end of the second probe with the cell.
[0017] As an optional technical scheme of the solar cell detection mechanism, the first probe is configured to contact part of the fine grid lines on the cell, and the second probe is configured to contact the short connecting lines and part of the fine grid lines on the cell.
[0018] As an optional technical scheme of the solar cell detection mechanism, the bracket is provided with a first mounting position and a second mounting position, the second mounting position is located at both ends of the bracket, and the first mounting position is located between the two second mounting positions; the first probe is mounted at the first mounting position, and the second probe is mounted at the second mounting position.
[0019] As an optional technical scheme of the solar cell detection mechanism, the first probe and the second probe each include a barrel, an elastic member, and a head;
[0020] One end of the barrel is a closed end, and the other end is an open end; the head is movably inserted into the open end; the elastic member is built into the barrel, and one end of the elastic member is connected to the closed end, and the other end of the elastic member is connected to the head.
[0021] The beneficial effects of the utility model at least include:
[0022] The utility model provides a solar cell detection mechanism, this solar cell detection mechanism includes support, first probe unit and second probe unit. Along the length direction of support, support includes the second probe unit at both ends thereof, and the first probe unit between two second probe unit. First probe unit has a plurality of first probe rows, and each first probe row has a plurality of first probes. Second probe unit has a plurality of second probe rows, and each second probe row has a plurality of second probes. The interval between two adjacent second probes is less than the interval between two adjacent first probes.
[0023] Above, the interval between two adjacent second probes in the utility model is less than the interval between two adjacent first probes, that is to say, the density of second probe is set to be greater than the density of first probe. That is, by setting the second probe at both ends of support in contact with the short connecting line at the edge of cell piece, when the transmitted cell piece is offset, the second probe set can also ensure stable contact with the short connecting line, thereby improving the accuracy of the contact between the second probe and the short connecting line of the cell piece, and the transmission of the cell piece has a certain fault tolerance, reduces or avoids the phenomenon of local poor contact of the cell piece, reduces or avoids the risk of inconsistent EL light and shade of photovoltaic module, and improves product yield. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical scheme in the utility model embodiment, the drawings needed in the description of the utility model embodiment will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the utility model embodiment and these drawings without creative labor for those skilled in the art.
[0025] Figure 1 is the top view of the solar cell detection mechanism provided by the utility model embodiment;
[0026] Figure 2 is the structural schematic view of the first probe provided by the utility model embodiment;
[0027] Figure 3 is the position relation schematic view of the solar cell detection mechanism, the fine grid line and the short connecting line provided by the utility model embodiment;
[0028] Figure 4 is the position relation schematic view of the solar cell detection mechanism and the cell piece provided by the utility model embodiment;
[0029] Figure 5 is the EL test diagram of the photovoltaic module in the prior art;
[0030] Figure 6 is the EL test chart of the photovoltaic module provided by the embodiment of the present application.
[0031] Reference signs
[0032] 10, support; 101, middle region; 102, edge region;
[0033] 20, first probe row; 21, first probe; 211, barrel; 2111, closed end; 212, elastic member; 213, head; 2131, connecting rod; 2132, contact end;
[0034] 30, second probe row; 31, second probe;
[0035] 100, battery piece; 110, fine grid line; 120, short connecting line. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.
[0038] It should be noted that: similar reference signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0039] In the description of the utility model, it needs to be explained that, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0040] In the description of the utility model, it also needs to be explained that, unless otherwise specified and limited, the terms "arrangement", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0041] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0042] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0043] The embodiment provides a kind of solar cell detection mechanism, can improve the short connection line contact accuracy of second probe and cell piece, reduce or avoid the phenomenon that cell piece local contact is bad, reduce or avoid photovoltaic module EL light and shade inconsistency risk, improve product yield.
[0044] EL (E l ectro Luminescence) is also called electronic luminescence detection.
[0045] As Figures 1-4 shown, the solar cell detection mechanism includes a bracket 10, a first probe unit and a second probe unit. Along the length direction of the bracket 10, the two ends of the bracket 10 are provided with the second probe unit, and the first probe unit is arranged between the two second probe units. That is, the bracket 10 has a middle region 101 and an edge region 102, the edge region 102 is provided with two, and the middle region 101 is located between the two edge regions 102. The first probe unit is arranged in the middle region 101, and the first probe unit has a plurality of rows of first probe rows 20, each row of first probe rows 20 has a plurality of first probes 21, and the first probes 21 are configured to contact the partial fine grid lines 110 on the cell sheet 100. The second probe unit is arranged in the edge region 102, and the second probe unit has a plurality of rows of second probe rows 30, each row of second probe rows 30 has a plurality of second probes 31, the density of the second probes 31 is greater than the density of the first probes 21, and the second probes 31 are configured to contact the short connection lines 120 and the partial fine grid lines 110 on the cell sheet 100.
[0046] Based on the above design, in the embodiment, by partitioning the bracket 10, that is, arranging the middle region 101 in the middle position of the bracket 10, arranging the edge region 102 in the two edge positions of the bracket 10, and arranging the second probe 31 in the edge region 102 with a density greater than the density of the first probe 21 in the middle region 101, the first probe 21 is used to contact the partial fine grid lines 110 on the cell sheet 100, and the second probe 31 is used to contact the short connection lines 120 at the edge of the cell sheet 100 and the fine grid lines 110 at the edge of the cell sheet. In the process of detecting the cell sheet 100 by the solar cell detection mechanism, when the transmitted cell sheet 100 deviates, since the short connection lines 120 are located at the edge of the cell sheet 100, when the cell sheet 100 deviates slightly, the short connection lines 120 at the edge of the cell sheet 100 will deviate greatly. In the embodiment, the second probe row 30 for contacting the short connection lines 120 at the two ends of the bracket 10 is arranged in a high density, so that when the cell sheet 100 deviates, the second probe 31 arranged in a high density can also ensure stable contact with the short connection lines 120, thereby improving the contact accuracy of the second probe 31 with the short connection lines 120 of the cell sheet 100, and also making the transmission of the cell sheet 100 have a certain fault tolerance, reducing or avoiding the phenomenon of local poor contact of the cell sheet 100, reducing or avoiding the risk of inconsistent EL brightness of the photovoltaic module, and improving the product yield.
[0047] Optionally, the first probe row 20 and the second probe row 30 in the embodiment are arranged in parallel, which is convenient for adapting to the strip-shaped bracket 10, reduces the volume of the bracket 10, and is convenient for assembly.
[0048] As Figure 3As shown, in the present embodiment, the first probe row 20 is mainly used for contacting the fine grid lines 110 in the middle region of the cell sheet 100, and the second probe row 30 is mainly used for contacting the fine grid lines 110 at the edge of the cell sheet 100 and the short connecting lines 120.
[0049] It should be noted that the solar cell detection mechanism in the present embodiment can improve the contact resistance between the metal and the semiconductor in the cell sheet 100 during the testing of the efficiency of the cell sheet 100. Specifically, the solar cell detection mechanism is in a dark and sealed environment, and during the testing, the cell sheet 100 needs to be irradiated with high-intensity laser, at the same time, the first probe 21 contacts part of the fine grid lines 110 on the cell sheet 100, the second probe 31 contacts the short connecting lines 120 and part of the fine grid lines 110 on the cell sheet 100, and a bias voltage of 10V or above is applied to the cell sheet 100, at this time, a local current of several amperes is generated in the cell sheet 100, which can significantly reduce the contact resistance between the metal and the semiconductor in the cell sheet 100, thereby improving the photoelectric conversion efficiency of the cell sheet 100.
[0050] Optionally, as shown, the cell sheet 100 in the present embodiment is a main grid-free cell, and the cell sheet 100 can be a full-size cell or a half-cell. Figure 4 The short connecting lines 120 and the fine grid lines 110 in the present embodiment are perpendicular to each other, and during the detection of the cell sheet 100, the first probe row 20 and the second probe row 30 are perpendicular to the fine grid lines 110, so that even if the cell sheet 100 has a certain degree of deviation during transmission, the first probe row 20 and the second probe row 30 can ensure stable contact with the fine grid lines 110 to ensure good metal contact inside the cell sheet 100.
[0051] Optionally, the number of the second probe row 30 in the present embodiment is greater than the number of the first probe row 20, thereby improving the reliability and stability of the contact between the second probe row 30 and the short connecting lines 120 on the cell sheet 100. For example, the second probe row 30 can be provided as four rows, and the first probe row 20 can be provided as two rows.
[0052] Further, the size of the first probe 21 in the present embodiment is greater than the size of the second probe 31. That is, the size of the second probe 31 is smaller than the size of the first probe 21. In other words, the second probe 31 adopts a small-diameter probe, and the second probe 31 adopts a large-diameter probe. For example, the cross-sectional area of the contact end of the second probe 31 with the cell sheet 100 is smaller than the cross-sectional area of the contact end of the first probe 21 with the cell sheet 100, for example, the cross-sectional area of the contact end of the second probe 31 with the cell sheet 100 can be set to 1mm 2 -3mm 2The cross-sectional area of the contact end of the first probe 21 with the battery sheet 100 can be set to 2mm 2 -6mm 2 In this way, the density of the second probe 31 can be greater than the density of the first probe 21 while changing the size of the bracket 10, so that the bracket 10 is simple in structure and easy to process and assemble later.
[0053] Alternatively, the cross-sectional area of the contact end of the first probe 21 with the battery sheet 100 is 2 times the cross-sectional area of the contact end of the second probe 31 with the battery sheet 100. Of course, the first probe 21 and the second probe 31 of other sizes can also be designed by the operator, which will not be described here.
[0054] Alternatively, the length of the first probe unit in the embodiment is greater than the length of the second probe unit, so as to adapt to the structural layout of the thin grid line 110 and the short connecting line 120 of the battery sheet 100.
[0055] Alternatively, the first probe 21 in the embodiment can be a flat probe of a common 400A specification on the market, and the second probe 31 can be a flat probe of a common 200A specification on the market.
[0056] Alternatively, the distance between the two adjacent second probes 31 in the embodiment is less than the distance between the two adjacent first probes 21.
[0057] Alternatively, the length of the bracket 10 in the embodiment is greater than 215mm, so as to be applicable to most battery sheets 100 on the market.
[0058] As shown in Figure 1 The first probes 21 in the two adjacent first probe rows 20 are staggered, and the second probes 31 in the two adjacent second probe rows 30 are staggered. In this way, the probability and accuracy of the contact between the first probe 21 and the thin grid line 110 can be improved, and the probability and accuracy of the contact between the second probe 31 and the short connecting line 120 can be improved, so as to reduce or avoid the phenomenon of local poor contact of the battery sheet 100, reduce or avoid the risk of inconsistent EL of the photovoltaic module, and improve the product yield.
[0059] Furthermore, in some optional embodiments, the first probes 21 in two adjacent rows of first probe rows 20 are staggered and tangential, and the second probes 31 in two adjacent rows of second probe rows 30 are staggered and tangential. This allows the first probes 21 and second probes 31 to cover a denser test area within a limited space, avoiding missed detections caused by excessive spacing between the first probes 21 and second probes 31. Simultaneously, the tangential design ensures that the first probe 21 forms line contact or surface contact (rather than point contact) when it contacts the fine grid line 110, and the second probe 31 forms line contact or surface contact when it contacts the short connecting line 120, reducing resistance fluctuations caused by poor contact and thus improving the accuracy of the current / voltage detection data of the solar cell 100.
[0060] In this embodiment, the bracket 10 is provided with a first mounting position and a second mounting position. The first mounting position is located in the central region 101, and the second mounting position is located in the edge region 102. The first probe 21 is mounted at the first mounting position, and the second probe 31 is mounted at the second mounting position. The arrangement of the first mounting position and the second mounting position facilitates the connection between the first probe 21, the second probe 31 and the bracket 10.
[0061] Optionally, in this embodiment, there are multiple first mounting positions and multiple second mounting positions, and the first mounting position is set to correspond one-to-one with the first probe 21, and the second mounting position is set to correspond one-to-one with the second probe 31.
[0062] like Figures 1-2 As shown, in this embodiment, both the first probe 21 and the second probe 31 include a cylindrical body 211, an elastic element 212, and a head 213. One end of the cylindrical body 211 is a closed end 2111, and the other end is an open end; the head 213 is movably inserted into the open end; the elastic element 212 is built into the cylindrical body 211, and one end of the elastic element 212 is connected to the closed end 2111, and the other end of the elastic element 212 is connected to the head 213.
[0063] It should be noted that the first probe 21 and the second probe 31 in this embodiment differ only in size; their structural composition is identical. Both the first probe 21 and the second probe 31 in this embodiment consist of a cylindrical body 211, an elastic element 212, and a head 213. The head 213 is fixed within the cylindrical body 211 by the elastic element 212, which is built into the cylindrical body 211. This allows for a soft connection between the head 213 and the battery cell 100 when the first probe 21 (or the second probe 31) contacts the battery cell 100, preventing fragmentation of the battery cell 100 and improving its protection.
[0064] Optionally, in order to improve the reliability and stability of the connection between the first probe 21 and the second probe 31 and the bracket 10, and to avoid the first probe 21 and the second probe 31 from becoming loose and falling off during use, in this embodiment, an external thread is provided on the outer periphery of the closed end 2111 of the cylinder 211, and an internal thread is provided on both the first mounting position and the second mounting position. The internal thread is threadedly connected to the external thread, which also facilitates the disassembly and replacement of the first probe 21 and the second probe 31 in the later stage.
[0065] like Figure 1 As shown, in this embodiment, the cylinder 211 includes a cap and a body; one end of the body is threadedly connected to the cap to form a closed end 2111, and part of the cap is located on the top of the bracket 10. The cap facilitates the disassembly of the body.
[0066] Furthermore, in this embodiment, the head 213 includes a connecting rod 2131 and a contact end 2132 connected in sequence; the end of the connecting rod 2131 away from the contact end 2132 is connected to the elastic element 212, and the outer diameter of the connecting rod 2131 is smaller than the inner diameter of the open end. This facilitates the reciprocating motion of the connecting rod 2131 under the drive of the elastic element 212, reduces friction with the inside of the cylinder 211, improves the smoothness of the movement of the connecting rod 2131, reduces the pressure on the battery cell 100, and avoids the battery cell 100 from being crushed and broken.
[0067] Optionally, the elastic element 212 in this embodiment can be configured as a spring.
[0068] Optionally, in this embodiment, both the first probe 21 and the second probe 31 are metal parts. In order to save costs, improve the conductivity of the first probe 21 and the second probe 31, and reduce the current loss due to internal resistance, the first probe 21 and the second probe 31 in this embodiment are preferably made of copper.
[0069] The method and steps used by the solar cell testing organization to perform EL testing on cell 100 are as follows:
[0070] I. Placement of solar cells
[0071] The solar cell 100 to be tested is placed on the stage, ensuring its position is fixed to prevent movement during testing. Simultaneously, the surface of the solar cell 100 is ensured to be clean and free from external light source interference. The front / back grid pattern of the solar cell 100 is identified using an optical positioning system to determine the contact areas of the first probe row 20 and the second probe row 30 with the target.
[0072] II. Connecting Equipment
[0073] The multi-axis precision moving platform drives the support in the embodiment to make the contact end 2132 of the first probe vertically contact the predetermined position of the fine grid line 110 on the back of the cell sheet 100, and the contact end 2132 of the second probe vertically contact the predetermined position of the fine grid line 110 and the short connecting line 120 on the back of the cell sheet 100. The contact pressure is controlled in the range of 5 mN-50 mN to reduce the contact resistance and avoid damaging the grid line.
[0074] III. Apply voltage
[0075] A forward bias voltage (0.5-1.2 times Voc) is applied to the solar cell detection mechanism, and a direct current of 10 A / cm2is injected synchronously to make the cell sheet 100 generate electroluminescence effect. 2 -200 mA / cm 2 A forward bias voltage (0.5-1.2 times Voc) is applied to the solar cell detection mechanism, and a direct current of 10 A / cm2is injected synchronously to make the cell sheet 100 generate electroluminescence effect.
[0076] IV. EL signal acquisition
[0077] A refrigeration type CCD (charge coupled device) or InGaAs infrared camera (wavelength range 900 nm-1300 nm) is used to capture the EL radiation image of the surface of the cell sheet 100 with an exposure time of 5-30 seconds, and the camera resolution needs to be ≥5 μm / pixel to identify microcracks and broken grid defects.
[0078] The voltage-current characteristic curves of the contact end 2132 of the first probe and the contact end 2132 of the second probe are recorded synchronously, and the light and dark distribution of the EL image is associated with the change of the local series resistance.
[0079] Test example:
[0080] Table 1 shows the EL light and dark conditions of the photovoltaic module after the cell sheet 100 is tested by the solar cell detection mechanism in the embodiment, compared with the prior art.
[0081] Table 1
[0082] Photovoltaic module verification quantity / tile Edge light and dark quantity Proportion Prior art 1000 13 13％ This example verification 1 216 0 0％ This example verification 2 2987 0 0％
[0083] As can be seen from Table 1, after the cell sheet 100 is tested by the solar cell detection mechanism in the embodiment, the number of EL light and dark of the photovoltaic module is significantly reduced, thereby reducing or avoiding the risk of inconsistent EL light and dark of the photovoltaic module, and improving the product yield.
[0084] Figure 5 The dashed box in the prior art is the area of inconsistent EL light and dark of the photovoltaic module, Figure 6 The EL light and dark conditions of the photovoltaic module after the cell sheet 100 is tested by the solar cell detection mechanism in the embodiment. As can be seen, the inconsistent EL light and dark of the photovoltaic module is significantly improved.
[0085] Obviously, the above only the preferred embodiments of the present application and the use of technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments here, those skilled in the art can be made various obvious changes, re-adjustment and replacement without departing from the scope of the present application. Therefore, although the above embodiments of the present application has been described in more detail, but the present application is not limited to the above embodiments, without departing from the present application concept, but also can include more other equivalent embodiments, and the scope of the present application is determined by the appended claims.
[0086] Note that in the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
Claims
1. A solar cell inspection mechanism characterized by, The application relates to a probe rack. The probe rack comprises a rack (10), which comprises second probe units at two ends of the rack (10) in the length direction of the rack (10) and a first probe unit between the two second probe units. The first probe unit has a plurality of first probe rows (20), each first probe row (20) having a plurality of first probes (21); the second probe unit has a plurality of second probe rows (30), each second probe row (30) having a plurality of second probes (31). The distance between two adjacent second probes (31) is smaller than the distance between two adjacent first probes (21).
2. The solar cell inspection mechanism according to claim 1, wherein The cross-sectional area of the contact end of the first probe (21) with a battery piece (100) is larger than the cross-sectional area of the contact end of the second probe (31) with the battery piece (100).
3. The solar cell inspection mechanism according to claim 1, wherein The number of the second probe rows (30) is greater than the number of the first probe rows (20).
4. The solar cell inspection mechanism according to claim 1, wherein The length of the first probe unit is greater than the length of the second probe unit.
5. The solar cell inspection mechanism of claim 1, wherein The first probes (21) in two adjacent first probe rows (20) are arranged in a staggered manner, and the second probes (31) in two adjacent second probe rows (30) are arranged in a staggered manner.
6. The solar cell inspection mechanism of claim 1, wherein The first probes (21) in two adjacent first probe rows (20) are arranged in a staggered and tangent manner, and the second probes (31) in two adjacent second probe rows (30) are arranged in a staggered and tangent manner.
7. The solar cell inspection mechanism of claim 1, wherein The cross-sectional area of the contact end of the first probe (21) with a battery piece (100) is twice the cross-sectional area of the contact end of the second probe (31) with the battery piece (100).
8. The solar cell inspection mechanism of claim 1, wherein The first probe (21) is configured to contact part of a fine grid line (110) on the battery piece (100); and the second probe (31) is configured to contact a short connecting line (120) and part of the fine grid line (110) on the battery piece (100).
9. The solar cell inspection mechanism of claim 1, wherein The rack (10) is provided with first mounting positions and second mounting positions, the second mounting positions are located at two ends of the rack (10), the first mounting positions are located between the two second mounting positions, the first probes (21) are mounted at the first mounting positions, and the second probes (31) are mounted at the second mounting positions.
10. The solar cell inspection mechanism of claim 1, wherein, The first probe (21) and the second probe (31) each comprise a barrel (211), an elastic member (212) and a head (213). One end of the barrel (211) is a closed end (2111), the other end is an open end, the head (213) is movably inserted into the open end, the elastic member (212) is arranged in the barrel (211), one end of the elastic member (212) is connected with the closed end (2111), and the other end of the elastic member (212) is connected with the head (213).