Device for detecting minority carrier lifetime of silicon rod
By using buffers in the silicon rod sub-life detection device to reduce the movement speed of the detector, the problem of impact load between the detector and the silicon rod is solved, and the stability and reliability of the detection device are improved.
Patent Information
- Application Number
- CN202421514685.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing silicon rod sub-life detection device moves at a high speed before the detector contacts the silicon rod, which can easily lead to a large impact load between the detector and the silicon rod, causing damage to the silicon rod or detector and other devices.
A numeral life detection device for silicon rods is designed. By reducing the movement speed of the detector before the detector contacts the silicon rod, the buffer is used to contact the detector before the detector contacts the silicon rod, thereby avoiding impact loads.
It effectively avoids impact load between the detector and the silicon rod, reduces damage to devices such as silicon rod or detector, and improves the stability and reliability of the detection device.
Smart Images
Figure CN222979723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silicon rod detection, in particular to a minority carrier lifetime detection device for silicon rods. Background Art
[0002] In the production process of photovoltaic cells, it is necessary to first draw a cylindrical single-crystal silicon rod, and then the cylindrical silicon rod is successively subjected to a cutting process, a squaring process and a slicing process to form silicon wafers, and finally the silicon wafers are made into solar cells. When mass-producing single-crystal silicon rods, it is necessary to continuously refill the crystal furnace to produce multiple silicon rods from the same crystal furnace to improve the production efficiency of the silicon rods.
[0003] Since multiple refills will leave more metal impurities at the bottom of the furnace, resulting in a lower minority carrier lifetime of some silicon rods, and thus the cell efficiency is unstable. Therefore, a detection device is needed to detect the minority carrier lifetime of the silicon rods to ensure the quality of the solar cells.
[0004] Existing detection devices usually use a driving component to drive the detector close to the silicon rod, so that the detector contacts the silicon rod to achieve automation. However, before the detector contacts the silicon rod, it has a relatively high moving speed, and it is easy to generate a large impact load between the detector and the silicon rod, which easily causes damage to devices such as the silicon rod or the detector. Summary of the Utility Model
[0005] To solve the problem that devices such as the silicon rod or the detector are easily damaged due to the large impact load easily generated between the detector and the silicon rod, the utility model provides a minority carrier lifetime detection device for silicon rods, which can reduce the moving speed of the detector before the detector contacts the silicon rod, avoid a large impact load between the detector and the silicon rod, and solve the problem of damage to devices such as the silicon rod or the detector.
[0006] An embodiment of the utility model provides a minority carrier lifetime detection device for silicon rods, including:
[0007] A workbench for placing the silicon rod;
[0008] A support frame straddling above the workbench;
[0009] Two groups of detectors correspondingly arranged outside the two end faces of the silicon rod, and the detection ends of the two groups of detectors face the corresponding end faces of the silicon rod;
[0010] A driving component fixedly arranged on the support frame for driving the two groups of detectors to approach or move away from each other along the axial direction of the silicon rod;
[0011] Two groups of connecting frames for connecting the two groups of detectors and the driving component;
[0012] Two sets of buffer members are correspondingly arranged on the two sets of the connecting frames, and the front ends of the buffer members face the corresponding end faces of the silicon rods; in the axial direction of the silicon rods, the front ends of the buffer members exceed the detection ends of the corresponding detectors, so that the buffer members contact the end faces of the silicon rods prior to the detectors.
[0013] In some embodiments, proximity switches are arranged on each set of the connecting frames, the detection ends of the proximity switches face the corresponding end faces of the silicon rods, and the proximity switches are electrically connected to the detectors and the driving assembly; when the proximity switches detect the silicon rods, the driving assembly stops driving, and the detection ends of the two sets of detectors abut against the corresponding end faces of the silicon rods, and the detectors are turned on to detect the silicon rods.
[0014] In some embodiments, protective sleeves are arranged outside the detectors.
[0015] In some embodiments, the driving assembly includes two sets of magnetic coupling rodless cylinders, the sliders on the two sets of magnetic coupling rodless cylinders move along the axial direction of the silicon rods, and the two sets of detectors are connected to the corresponding sliders through the connecting frames.
[0016] In some embodiments, the support frame includes a cross beam spanning above the workbench and legs vertically arranged on both sides of the workbench, and the longitudinal direction of the cross beam is parallel to the axial direction of the silicon rods.
[0017] In some embodiments, the driving assembly includes two sets of magnetic coupling rodless cylinders, the two sets of magnetic coupling rodless cylinders are fixed on the cross beam and close to both ends of the cross beam; the sliders on the two sets of magnetic coupling rodless cylinders can move along the longitudinal direction of the cross beam, and the two sets of detectors are connected to the corresponding sliders through the connecting frames.
[0018] In some embodiments, the connecting frame is L-shaped and includes a horizontal bracket at the top and a vertical bracket perpendicular to the horizontal bracket; the horizontal bracket is connected to the slider, and the detector is arranged on the vertical bracket.
[0019] In some embodiments, a cylindrical protective sleeve is arranged outside each set of detectors, and the protective sleeve penetrates from one side of the vertical bracket to the other side, so that the protective sleeve is embedded on the vertical bracket.
[0020] In some embodiments, the buffer member is an oil buffer, and the buffer member penetrates from one side of the vertical bracket to the other side, so that the buffer member is embedded on the vertical bracket.
[0021] In some embodiments, a proximity switch in the shape of a cylinder is provided on each set of the connecting frames. The detection end of the proximity switch faces the corresponding end face of the silicon rod. The proximity switch is electrically connected to the detector and the driving component; the proximity switch penetrates from one side of the vertical bracket to the other side, so that the proximity switch is embedded in the vertical bracket.
[0022] Using the minority carrier lifetime detection device for the silicon rod of the present utility model, the driving component is used to drive the detector close to the silicon rod so that the detector contacts the silicon rod; before the detector contacts the silicon rod, the buffer can reduce the moving speed of the detector, avoid a large impact load generated between the detector and the silicon rod, and improve the problem of damage to devices such as the silicon rod or the detector. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a front view structural schematic diagram of the minority carrier lifetime detection device for the silicon rod;
[0024] Figure 2 is an isometric view structural schematic diagram of the minority carrier lifetime detection device for the silicon rod;
[0025] Figure 3 is Figure 2 a partial enlarged structural schematic diagram at A in
[0026] In the figure: workbench 10; fixture 11; support frame 20; cross beam 21; support leg 22; driving component 30; connecting frame 40; detector 50; protective sleeve 60; buffer 70; proximity switch 80; silicon rod 90. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0028] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the objectives that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover.
[0029] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0030] As Figure 1 and Figure 2 As shown, this embodiment provides a minority carrier lifetime detection device for a silicon rod, which includes a workbench 10, a support frame 20, a driving assembly 30, and a detector 50. The workbench 10 of this embodiment is used to place the silicon rod 90 to be detected. Preferably, a fixture 11 is provided on the workbench 10. The silicon rod 90 to be detected is positioned by using the fixture 11 to ensure that the silicon rod 90 is stably placed on the workbench 10 during detection and to ensure the accuracy of data detection.
[0031] The support frame 20 of this embodiment straddles above the workbench 10. The support frame 20 preferably includes a cross beam 21 spanning above the workbench 10 and legs 22 vertically provided on both sides of the workbench 10. The longitudinal direction of the cross beam 21 is parallel to the axial direction of the silicon rod 90, and the structure of the support frame 20 is simple. It should be noted that the support frame 20 is an existing conventional bracket and can be adaptively changed in shape according to actual needs, which will not be elaborated in this embodiment.
[0032] Two groups of detectors 50 of this embodiment are correspondingly provided outside the two end faces of the silicon rod 90. The detection ends of the two groups of detectors 50 face the corresponding end faces of the silicon rod 90, and the two groups of detectors 50 can approach or move away from each other along the axial direction of the silicon rod 90. When the two groups of detectors 50 approach each other and abut against the end face of the silicon rod 90, the two groups of detectors 50 can detect the minority carrier lifetime of the silicon rod 90; when the two groups of detectors 50 move away from each other, there is enough space between the two groups of detectors 50 to facilitate the disassembly and assembly of the silicon rod 90 on the fixture 11. It should be noted that the specific structure of the detector 50 and the detection principle of the minority carrier lifetime are prior art and will not be elaborated in this embodiment.
[0033] The driving component 30 of this embodiment is fixedly arranged on the support frame 20. The driving component 30 is connected to two groups of detectors 50 through a connecting frame 40, and is used to drive the two groups of detectors 50 to approach or move away from each other along the axial direction of the silicon rod 90. The driving component 30 preferably uses two groups of magnetic coupling rodless cylinders. The two groups of magnetic coupling rodless cylinders are fixed on the cross beam 21 and are arranged near the two ends of the cross beam 21. The sliders on the two groups of magnetic coupling rodless cylinders can move longitudinally along the cross beam 21 to facilitate the two groups of magnetic coupling rodless cylinders to drive the two groups of detectors 50. The two groups of detectors 50 are correspondingly connected to the sliders of the two groups of magnetic coupling rodless cylinders through two groups of connecting frames 40, and the sliders drive the corresponding detectors 50 to approach or move away from each other through the connecting frames 40. The magnetic coupling rodless cylinder of this embodiment has the function of overload protection. If the impact load when the detector 50 contacts the silicon rod 90 is too large, the magnet on the slider is separated from the magnet on the piston, preventing the magnetic coupling rodless cylinder from continuing to drive the detector 50. In some embodiments, existing driving components 30 such as electric push rods, rod cylinders, motors, and connecting rods can be selected according to actual needs. It should be noted that the structure and the principle of overload protection in the magnetic coupling rodless cylinder are prior art and will not be elaborated in this embodiment.
[0034] The connecting frame 40 of this embodiment preferably has an L shape, and specifically includes a horizontal bracket at the top and a vertical bracket perpendicular to the horizontal bracket. The horizontal bracket is connected to the slider of the magnetic coupling rodless cylinder, and the detector 50 is arranged on the vertical bracket. The structure of this connecting frame 40 is simple and convenient for connecting the driving component 30 and the detector 50. It should be noted that the structure of the connecting frame 40 can be designed into various shapes according to requirements and will not be elaborated in this embodiment.
[0035] Specifically refer to Figure 3 , a protective cover 60 is arranged on the outer side of each group of detectors 50 in this embodiment. The protective cover 60 preferably has a cylindrical shape to facilitate wrapping the detector 50. The protective cover 60 penetrates from one side of the vertical bracket to the other side, so that the protective cover 60 is embedded on the vertical bracket to ensure that the protective cover 60 is firmly fixed to the connecting frame 40. The protective cover 60 can not only play a role in dust prevention, but also absorb external impact collisions, which helps to extend the service life of the detector 50.
[0036] In each set of connecting frames 40 of this embodiment, a buffer member 70 is provided. The front end of the buffer member 70 faces the corresponding end face of the silicon rod 90. In the axial direction of the silicon rod 90, the front end of the buffer member 70 extends beyond the detection end of the corresponding detector 50, so that the buffer member 70 contacts the end face of the silicon rod 90 prior to the detector 50. The buffer member 70 can reduce the moving speed of the detector 50 before the detector 50 contacts the silicon rod 90, avoid a large impact load between the detector 50 and the silicon rod 90, and improve the problem of damage to devices such as the silicon rod 90 or the detector 50. Specifically, the buffer member 70 in this embodiment is preferably an oil buffer, and the buffer member 70 preferably penetrates from one side of the vertical bracket to the other side, so that the buffer member 70 is embedded in the vertical bracket. The oil buffer has stable working performance and can effectively decelerate the detector 50 smoothly before the detector 50 contacts the end face of the silicon rod 90. In some embodiments, other conventional buffer members 70 can be selected according to requirements.
[0037] In each set of connecting frames 40 of this embodiment, a proximity switch 80 is provided. The detection end of the proximity switch 80 faces the corresponding end face of the silicon rod 90. The proximity switch 80 is electrically connected to the detector 50 and the driving assembly 30. When the proximity switch 80 detects the silicon rod 90, the driving assembly 30 stops driving, and the detection ends of the two detectors 50 abut against the corresponding end faces of the silicon rod 90, and the detector 50 is turned on to detect the silicon rod 90. The proximity switch 80 is preferably cylindrical, and the proximity switch 80 penetrates from one side of the vertical bracket to the other side, so that the proximity switch 80 is embedded in the vertical bracket. The proximity switch 80 enables the detection end of the detector 50 to stop in time when it moves into place, which can prevent the detector 50 from violently hitting the silicon rod 90 and further improve the situation of damage to devices such as the silicon rod 90 or the detector 50.
[0038] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0039] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. A device for detecting minority carrier lifetime of a silicon rod, characterized in that: include: A workbench (10) for placing silicon rods (90); A support frame (20) is arranged across the workbench (10); Two groups of detectors (50) are correspondingly arranged on the outside of the two end surfaces of the silicon rod (90), and the detection ends of the two groups of detectors (50) face the corresponding end surfaces of the silicon rod (90); A driving assembly (30) is fixedly mounted on the support frame (20) and is used to drive the two groups of detectors (50) to move closer to or farther from each other along the axial direction of the silicon rod (90); Two sets of connecting frames (40) for connecting two sets of the detectors (50) and the driving components (30); Two groups of buffer members (70) are correspondingly arranged on the two groups of connecting frames (40), and the front ends of the buffer members (70) face the corresponding end faces of the silicon rods (90); in the axial direction of the silicon rods (90), the front ends of the buffer members (70) exceed the corresponding detection ends of the detectors (50), so that the buffer members (70) contact the end faces of the silicon rods (90) before the detectors (50).
2. The detection device according to claim 1, characterized in that: Each group of the connecting frames (40) is provided with a proximity switch (80), the detection end of the proximity switch (80) faces the end surface corresponding to the silicon rod (90), and the proximity switch (80) is electrically connected to the detector (50) and the drive assembly (30); when the proximity switch (80) detects the silicon rod (90), the drive assembly (30) stops driving, the detection ends of the two groups of the detectors (50) abut against the end surfaces corresponding to the silicon rod (90), and the detectors (50) are turned on to detect the silicon rod (90).
3. The detection device according to claim 1 or 2, characterized in that: A protective cover (60) is provided on the outside of each group of detectors (50).
4. The detection device according to claim 1 or 2, characterized in that: The driving assembly (30) comprises two groups of magnetic coupling type rodless cylinders, the sliders on the two groups of magnetic coupling type rodless cylinders move along the axial direction of the silicon rod (90), and the two groups of detectors (50) are connected to the corresponding sliders via the connecting frame (40).
5. The detection device according to claim 1 or 2, characterized in that: The support frame (20) comprises a crossbeam (21) spanning above the workbench (10) and legs (22) vertically arranged on both sides of the workbench (10), and the longitudinal direction of the crossbeam (21) is parallel to the axial direction of the silicon rod (90).
6. The detection device according to claim 5, characterized in that: The driving assembly (30) comprises two groups of magnetic rodless cylinders, which are fixed on the crossbeam (21) and close to the two ends of the crossbeam (21); the sliders on the two groups of magnetic rodless cylinders can move along the longitudinal direction of the crossbeam (21), and the two groups of detectors (50) are connected to the corresponding sliders via the connecting frame (40).
7. The detection device according to claim 4, characterized in that: The connecting frame (40) is L-shaped and comprises a transverse support located at the top and a vertical support perpendicular to the transverse support; the transverse support is connected to the sliding block, and the detector (50) is arranged on the vertical support.
8. The detection device according to claim 7, characterized in that: A cylindrical protective cover (60) is provided on the outside of each group of the detectors (50), and the protective cover (60) penetrates from one side of the vertical bracket to the other side, so that the protective cover (60) is embedded in the vertical bracket.
9. The detection device according to claim 7, characterized in that: The buffer (70) is a hydraulic buffer, and the buffer (70) penetrates from one side of the vertical bracket to the other side, so that the buffer (70) is embedded in the vertical bracket.
10. The detection device according to claim 7, characterized in that: A cylindrical proximity switch (80) is provided on each group of the connecting frames (40), the detection end of the proximity switch (80) faces the end surface corresponding to the silicon rod (90), and the proximity switch (80) is electrically connected to the detector (50) and the drive assembly (30); the proximity switch (80) passes through from one side of the vertical bracket to the other side, so that the proximity switch (80) is embedded in the vertical bracket.