Crystal bar electrical property detection device

Abstract

The utility model provides a crystal bar electrical property detection device, and relates to the technical field of crystal bars. The device comprises a substrate, the substrate is connected with a moving mechanism, a frame is rotatably connected with the substrate, a first driving assembly is arranged on the substrate to drive the frame to rotate, and a BCT400 minority carrier lifetime detector and a four-probe resistance pen are connected to the frame. And a first distance measuring sensor and a second distance measuring sensor are respectively arranged on the frame at the side parts of the BCT400 minority carrier lifetime detector and the four-probe resistance pen. The detection work efficiency is improved, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crystal bar technical field, specifically relates to a crystal bar electric performance detection device. BACKGROUND

[0002] Photovoltaic power generation is green energy and sustainable energy, and has been vigorously developed in recent years. With the continuous decline of photovoltaic power generation cost, single crystal pulling rod has a broader market space.

[0003] In the overall process of single crystal pulling rod cutting, it needs to go through four processes of rod-pulling, cutting, square cutting and grinding. After the crystal bar is cut, in order to exclude the influence of unqualified crystal bar electric performance on the photoelectric conversion efficiency of the downstream customer, the detection department needs to detect the cross-sectional resistivity and minority carrier lifetime of the crystal bar.

[0004] At present, manual operation is generally used for detection. The detection personnel hold BCT400 minority carrier lifetime detector and use its probe to detect the cross-sectional resistivity and minority carrier lifetime of each crystal bar. This detection method is low in efficiency and high in labor cost. Moreover, due to the experience difference of the detection personnel and other factors, the accuracy of crystal bar electric performance detection fluctuates, and data distortion may occur due to detection errors of the head and tail data. UTILITY MODEL CONTENT

[0005] The utility model aims to develop a crystal bar electric performance detection device which can improve detection efficiency and reduce labor cost.

[0006] The utility model is realized by the following technical scheme:

[0007] A crystal bar electric performance detection device comprises:

[0008] A base plate is connected with a moving mechanism;

[0009] A frame is rotationally connected with the base plate;

[0010] A first driving assembly is arranged on the base plate to drive the frame to rotate;

[0011] A BCT400 minority carrier lifetime detector and a four-probe resistance pen are connected to the frame;

[0012] The frame on the side of the BCT400 minority carrier lifetime detector and the four-probe resistance pen is respectively provided with a first distance measuring sensor and a second distance measuring sensor.

[0013] Optionally, a hanger is arranged in the frame, and the BCT400 minority carrier lifetime detector is arranged on the hanger.

[0014] Optionally, the hanger is rotationally connected with the frame, and the frame is provided with a second driving assembly for driving the hanger to rotate.

[0015] Optionally, the second driving assembly comprises a support connected to the frame, a motor and a speed reducer are connected to the support, the motor is in transmission connection with the speed reducer, and the speed reducer is in transmission connection with the hanger.

[0016] Optionally, the side of the hanger is provided with two hanging plates, at least one first spring telescopic rod is connected between the hanging plates and the hanger, and the BCT400 minority carrier lifetime detector is connected to the two hanging plates.

[0017] Optionally, the hanging plate is L-shaped and comprises clamping portions and supporting portions which are perpendicular to each other, the clamping portions of the two hanging plates are parallel to each other, the BCT400 minority carrier lifetime detector is connected to the clamping portions of the two hanging plates, two first spring telescopic rods are arranged between the supporting portions of the two hanging plates and the hanger, and the first spring telescopic rods are perpendicular to the supporting portions of the hanging plates.

[0018] Optionally, a first distance measuring sensor is arranged at the bottom of the frame, two first distance measuring sensors are arranged on the hanger at the inner side of the supporting portions of the two hanging plates, and grooves corresponding to the first distance measuring sensors are arranged on the supporting portions of the hanging plates.

[0019] Optionally, a support is rotatably arranged at the side of the frame, the support is connected to the hanger to realize synchronous rotation, a mounting seat is arranged on the support, the four-probe resistance pen is arranged on the mounting seat, and the second distance measuring sensor is arranged on the support at the upper portion of the mounting seat.

[0020] Optionally, a mounting plate is arranged at the side of the mounting seat, two second spring telescopic rods which are perpendicular to the mounting plate are connected between the mounting plate and the mounting seat, and the four-probe resistance pen is arranged on the side wall of the mounting plate which is away from the mounting seat.

[0021] Optionally, the frame is rectangular and comprises a top plate, a first side plate, a bottom plate and a second side plate which are sequentially connected, the top plate is rotatably connected to the base plate, and the first driving assembly is a rotary platform.

[0022] The BCT400 minority carrier lifetime detector has the advantages that:

[0023] The BCT400 minority carrier lifetime detector can automatically detect the resistivity and minority carrier lifetime of a crystal bar section, the operation efficiency is greatly improved compared with manual operation, the labor cost is reduced, the automatic detection operation avoids operation errors or low operation consistency caused by personnel experience and the like, and the detection precision is affected, the distance between a probe and the crystal bar is monitored through a distance measuring sensor, the movement speed of the probe is controlled when the probe approaches the crystal bar, the impact and abrasion of the probe and the crystal bar caused by too large movement speed of the probe are avoided, the probe can be elastically telescopic, and buffering can be realized when the probe contacts the crystal bar, and the probe and the crystal bar are further protected. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 Structure diagram of the present application;

[0026] Figure 2 Three-dimensional structure diagram of the present application.

[0027] Reference signs: 1, base plate; 2, top plate; 3, first side plate; 4, bottom plate; 5, second side plate; 6, support frame; 7, speed reducer; 8, motor; 9, hanging rack; 10, hanging plate; 11, BCT400 minority life detector; 12, first distance measuring sensor; 13, first spring telescopic rod; 14, support; 15, second distance measuring sensor; 16, mounting plate; 17, four-probe resistance pen; 18, mounting seat; 19, second spring telescopic rod. DETAILED DESCRIPTION

[0028] Hereinafter, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present invention.

[0030] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, this utility model discloses a crystal rod electrical performance testing device, including a substrate 1. A frame is rotatably connected to the bottom of the substrate 1, and a BCT400 minority carrier lifetime detector 11 and a four-probe resistance probe 17 are connected to the frame. The substrate 1 is connected to a bidirectional or tridirectional moving mechanism (not shown in the figure). The bidirectional or tridirectional moving mechanism drives the testing device to approach or move away from the crystal rod, and can drive the BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17 to test the crystal rod.

[0033] The frame is rectangular and includes a top plate 2, a first side plate 3, a bottom plate 4, and a second side plate 5 connected in sequence, with adjacent plates connected perpendicularly. The top plate 2 is rotatably connected to the base plate 1, and the base plate 1 is provided with a first driving assembly for driving the top plate 2 to rotate. In this embodiment, the first driving assembly is a rotating platform.

[0034] A hanging bracket 9 is rotatably mounted inside the frame. The hanging bracket 9 is rotatably connected to the first side plate 3 and the second side plate 5 on both sides of the frame, and the rotation axis of the hanging bracket 9 is horizontal. A second drive assembly for driving the frame to rotate is provided on the outer wall of the first side plate 3. The second drive assembly includes a support frame 6 that is fixedly connected to the first side plate 3. A motor 8 and a reducer 7 are connected to the support frame 6. The motor 8 is driven by the reducer 7, and the reducer 7 is driven by the hanging bracket 9. The operation of the motor 8 drives the hanging bracket 9 to rotate.

[0035] The bracket 9 has two vertically arranged hanging plates 10 on its side. The BCT400 minority carrier lifetime detector 11 is located between the two hanging plates 10, with the probe of the BCT400 minority carrier lifetime detector 11 facing away from the bracket 9. The hanging plates 10 are L-shaped and include mutually perpendicular clamping parts and supporting parts. The clamping parts of the two hanging plates 10 are parallel to each other, and the BCT400 minority carrier lifetime detector 11 is connected to the clamping parts of the two hanging plates 10. Two first spring telescopic rods 13 are provided between the supporting parts of the two hanging plates 10 and the bracket 9. The first spring telescopic rods 13 are arranged perpendicular to the supporting parts of the hanging plates 10, and the elastic force of the first spring telescopic rods 13 allows the two hanging plates 10 and the BCT400 minority carrier lifetime detector 11 to move elastically along the telescopic direction of the first spring telescopic rods 13.

[0036] The bottom of the base plate 4 is provided with a first ranging sensor 12, and the brackets 9 on the inner side of the support of the two hanging plates 10 are each provided with two first ranging sensors 12. The support of the hanging plate 10 is provided with a slot corresponding to the position of the first ranging sensor 12.

[0037] A bracket 14 is rotatably connected to the outer wall of the second side plate 5. The bracket 14 is connected to the hanger 9 to achieve synchronous rotation. A mounting base 18 is provided on the bracket 14, and a second ranging sensor 15 is provided on the bracket 14 above the mounting base 18. A mounting plate 16 is provided on the side of the mounting base 18. Two second spring telescopic rods 19 perpendicular to the mounting plate 16 are connected between the mounting plate 16 and the mounting base 18. The second spring telescopic rods 19 are parallel to the first spring telescopic rod 13. A four-probe resistance pen 17 is installed on the side wall of the mounting plate 16 away from the mounting base 18.

[0038] During the electrical performance testing of the crystal ingot, a bidirectional or tridirectional moving mechanism drives the testing device to move, enabling the BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17 on the testing device to perform minority carrier lifetime and cross-sectional resistivity tests on the crystal ingot. The BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17 perform testing operations on the crystal ingot sequentially. During the testing operation of the BCT400 minority carrier lifetime detector 11, multiple first distance sensors 12 monitor the distance between the BCT400 minority carrier lifetime detector 11 and the crystal ingot cross-section. When the BCT400 minority carrier lifetime detector 11 approaches the crystal ingot and is about to contact the crystal ingot cross-section, the moving speed of the testing device slows down, allowing the BCT400 minority carrier lifetime detector 11 to slowly approach the crystal ingot cross-section. After contacting the crystal ingot cross-section, the first spring telescopic rod 13 elastically compresses to buffer the BCT400 minority carrier lifetime detector 11, avoiding rigid contact between the BCT400 minority carrier lifetime detector 11 and the crystal ingot cross-section. Similarly, the second ranging sensor 15 monitors the distance between the four-probe resistive pen 17 and the crystal rod cross-section. The four-probe resistive pen 17 decelerates when it approaches the crystal rod cross-section. After the four-probe resistive pen 17 contacts the crystal rod cross-section, the second spring telescopic rod 19 is compressed to buffer the four-probe resistive pen 17.

[0039] The rotation angle of the frame can be adjusted by the first drive component to adjust the vertical swing angle of the BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17. The rotation angle of the hanger 9 and the bracket 14 can be adjusted by the second drive component to adjust the horizontal swing angle of the BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17, thereby adjusting the position of the BCT400 minority carrier lifetime detector 11 and the four-probe resistance probe 17 to match the cross-section of the crystal rod.

[0040] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A device for testing the electrical properties of a crystal rod, characterized in that, include: The substrate is connected to the moving mechanism; The frame is rotatably connected to the substrate; The first driving component is mounted on the substrate to drive the frame to rotate; The BCT400 minority carrier lifetime detector and a four-probe resistance probe are connected to the frame; The BCT400 minority carrier lifetime detector and the four-probe resistive pen are respectively equipped with a first ranging sensor and a second ranging sensor on the side frame.

2. The crystal rod electrical performance testing device according to claim 1, characterized in that, The frame is equipped with a bracket, and the BCT400 minority carrier lifetime detector is mounted on the bracket.

3. The crystal rod electrical performance testing device according to claim 2, characterized in that, The hanger is rotatably connected to the frame, and the frame is provided with a second drive assembly that drives the hanger to rotate.

4. The crystal rod electrical performance testing device according to claim 3, characterized in that, The second drive assembly includes a support frame connected to the frame, on which a motor and a reducer are connected. The motor and the reducer are connected in a driving connection, and the reducer is connected in a driving connection to the hanger.

5. The crystal rod electrical performance testing device according to claim 3, characterized in that, The side of the bracket is provided with two hanging plates, and at least one first spring telescopic rod is connected between the hanging plates and the bracket. The BCT400 minority carrier lifetime detector is connected to the two hanging plates.

6. The crystal rod electrical performance testing device according to claim 5, characterized in that, The hanging plate is L-shaped and includes a clamping part and a supporting part that are perpendicular to each other. The clamping parts of the two hanging plates are parallel to each other. The BCT400 minority carrier lifetime detector is connected to the clamping parts of the two hanging plates. Two first spring telescopic rods are provided between the supporting parts of the two hanging plates and the hanging frame. The first spring telescopic rods are set perpendicular to the supporting parts of the hanging plates.

7. The crystal rod electrical performance testing device according to claim 6, characterized in that, The frame is provided with a first ranging sensor at the bottom, and two first ranging sensors are provided on the brackets inside the two hanging plate support parts. The hanging plate support part is provided with a slot corresponding to the position of the first ranging sensor.

8. The crystal rod electrical performance testing device according to claim 3, characterized in that, The frame is rotatably mounted on a bracket, which is connected to the hanger to achieve synchronous rotation. The bracket is mounted on a mounting base, the four-probe resistance pen is mounted on the mounting base, and the second distance sensor is mounted on a bracket on the upper part of the mounting base.

9. The crystal rod electrical performance testing device according to claim 8, characterized in that, The mounting base has a mounting plate on its side, and two second spring telescopic rods perpendicular to the mounting plate are connected between the mounting plate and the mounting base. The four-probe resistance pen is mounted on the side wall of the mounting plate away from the mounting base.

10. The crystal rod electrical performance testing device according to claim 1, characterized in that, The frame is rectangular and includes a top plate, a first side plate, a bottom plate, and a second side plate connected in sequence. The top plate is rotatably connected to the base plate, and the first driving component is a rotating platform.

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