Bypass diode electrical property detection system and method

Abstract

The invention relates to an electrical property detection system and method for a bypass diode, and relates to the technical field of diode detection. The system comprises a rack, and a conveying mechanism, an electrical detection mechanism, a controller and a screening assembly are arranged on the rack; the conveying mechanism is used for conveying diodes one by one, the electrical detection mechanism and the screening assembly are both controlled by the controller, the electrical detection mechanism comprises a first conductive pole piece and a first driving piece, and the first driving piece is used for driving the first conductive pole piece to move and make contact with the conveyed diodes to achieve electrical connection; the controller is used for applying voltage to the first conductive pole piece and acquiring electrical parameters, and the electrical parameters at least comprise data of current flowing through the first conductive pole piece; the controller is further used for controlling the screening assembly to screen defective products according to the obtained electrical parameters. The bypass diode electrical property detection method has the effect of optimizing the electrical property detection efficiency and the detection accuracy of the bypass diode.

Description

Technical Field

[0001] This application relates to the technical field of diode detection, and particularly to an electrical property detection system and method for a bypass diode. Background Art

[0002] Solar cell modules are used to obtain clean energy for power supply. They are generally installed in open and sunny areas. During long-term use, it is inevitable that they will be covered by fallen leaves and other obstacles. At this time, the shaded solar cell modules will be regarded as loads and consume the energy generated by other illuminated solar cell modules, forming the so-called hot spot effect - the shaded solar cell modules will heat up due to the hot spot effect and be damaged. To prevent the solar cells from being damaged by heating under the hot spot effect, a bypass protection diode is reversely connected in parallel between the positive and negative electrodes of the solar module. When the spot effect occurs, the current output by the normal photovoltaic module passes through the bypass protection diode. When a hot spot occurs, the output current of all components in the entire power generation matrix flows through the bypass protection diode; as the obstacle disappears, the diode quickly switches from forward conduction to reverse bias; at this time, the reverse leakage of the diode multiplies at high temperature, and the temperature of the diode will continue to rise. When the heat generated by the diode exceeds the heat dissipated, the bypass protection diode will fail at high temperature in a short time, thus losing its protection function.

[0003] In the production process, each diode product must be tested to ensure that it can work stably after being assembled into the circuit. At present, the general electrical property detection is manual sampling inspection, that is, a certain proportion of diodes are selected from the batch-produced diodes, and then the forward voltage and reverse voltage are applied to the anode and cathode of the diode manually using a pointer multimeter to detect the forward conduction and reverse cut-off performance of the diode. This detection method requires the detection personnel to repeat the operation, which not only takes a long time but also is prone to misdetection. Moreover, the above-mentioned sampling inspection method according to a certain proportion is also prone to missed detection, affecting the accuracy of quality inspection, so it needs to be improved. Summary of the Invention

[0004] In order to optimize the electrical property detection efficiency and detection accuracy of the bypass diode, this application provides an electrical property detection system and method for a bypass diode.

[0005] In the first aspect, the present application provides an electrical detection system for a bypass diode, comprising a frame, on which a transmission mechanism, an electrical detection mechanism, a controller and a screening component are arranged; the transmission mechanism is used to transmit the diodes one by one, and the electrical detection mechanism and the screening component are both controlled by the controller, the electrical detection mechanism comprises a first conductive electrode and a first driving member, the first driving member is used to drive the first conductive electrode to move and contact with the transmitted diode to achieve electrical connection, the controller is used to apply voltage to the first conductive electrode and obtain electrical parameters, and the electrical parameters include at least current data flowing through the first conductive electrode; the controller is also used to control the screening component to screen defective products using the obtained electrical parameters.

[0006] By adopting the above technical solution, the diodes are transmitted one by one through the transmission mechanism, and the first conductive electrode plate is driven to move by the first driving member so that the first conductive electrode plate is electrically connected to the transmitted diodes one by one. Then, the current is passed into the first conductive electrode plate through the controller so that a forward voltage or a reverse voltage is applied to the first conductive electrode plate, and the current data is recorded to realize the detection of the diodes. Finally, the screening component is controlled by the controller based on the detection results to automatically realize the screening of defective products, and machine detection replaces manual detection to improve the detection efficiency and accuracy. At the same time, unified detection of all diodes is used instead of random inspection to avoid the problem of incomplete detection caused by missed detection.

[0007] Preferably, it further includes a polarity unification mechanism, wherein the polarity unification mechanism and the electrical detection mechanism are arranged in sequence along the transmission direction of the diode; the polarity unification mechanism includes a second conductive electrode sheet, a second driving member, a turntable, a plurality of clamps rotatably connected to the turntable, a lever rotatably connected to the frame, and a limit arc plate arranged on the frame; the turntable is provided with a feed end and a discharge end, the clamps are arranged along the rotation direction of the turntable, and each clamp is used to clamp or release the diode; the transmission mechanism is used to supply the diode to the clamps rotated to the feed end of the turntable, and is used to receive the diode released by the clamps at the discharge end of the turntable; The second conductive electrode sheet and the lever are arranged sequentially along the rotation direction of the turntable, the second driving member is used to drive the second conductive electrode sheet to move and contact with the diode on the clamp to achieve electrical connection, the controller is used to apply voltage to the second conductive electrode sheet and obtain electrical parameters, and the electrical parameters at least include current data flowing through the second conductive electrode sheet; the controller is used to control whether the lever rotates based on the electrical parameters of the second conductive electrode sheet, and during the rotation of the lever, the diode moving with the turntable can be located on the rotation path of the lever, so that the diode rotates 180° driven by the rotating lever.

[0008] By adopting the above technical solution, during the process of the turntable transporting the diodes, the driving lever is rotated, so that the diodes moving onto the rotation path of the driving lever can be flipped by 180 degrees during the rotation of the driving lever. During this process, the diodes are always fixedly clamped by the clamping jaws, that is, the clamping jaws will also rotate 180° relative to the turntable, thereby realizing the position exchange of the leads at both ends of the diodes, so as to ensure that the cathodes of all the diodes output from the discharge end of the turntable are on the same side of the transmission direction, and the anodes of all the diodes are on the same side of the transmission direction, so that the diodes can achieve polarity unity when electrically connected to the first conductive electrode plate subsequently, which is convenient for uniformly applying forward voltage and reverse voltage.

[0009] Preferably, the transmission mechanism includes a chain that is connected to the frame in a transmission manner. A plurality of tooth blocks are respectively arranged at intervals along the chain transmission direction on the surface of the chain and on both sides thereof. A space for inserting a single diode lead is reserved between two adjacent tooth blocks on the same side; it further includes a leveling mechanism, and the leveling mechanism and the electrical detection mechanism are arranged in sequence along the diode transmission direction; the leveling mechanism includes a leveling wheel rotatably connected to the frame and a leveling backing plate arranged below the leveling wheel. The leveling wheel is located above the moving path of the diode leads when moving along with the chain, and a gap for only a few diode leads to pass through is reserved between the leveling wheel and the leveling backing plate.

[0010] By adopting the above technical solution, when the diodes move along with the chain and pass through the gap between the leveling wheel and the leveling backing plate, the diode leads will be pressed by the leveling wheel and the leveling backing plate, so as to straighten the bent diode leads through this operation, ensuring that the subsequent first conductive electrode plate can smoothly contact the diode leads and achieve electrical connection.

[0011] Preferably, it further includes a graffiti component, a drying component and a visual appearance detection component. The electrical detection mechanism, the graffiti component, the drying component and the visual appearance detection component are arranged in sequence along the diode transmission direction. The graffiti component is used for printing words on the surface of the diodes, the drying component is used for drying the surface of the diodes after the printing process, the visual appearance detection component is electrically connected to the controller to obtain the surface image of the diodes after the drying process, and the controller is used to analyze the image detected by the visual appearance detection component and analyze the printing effect based on the image, and finally output the analysis result.

[0012] By adopting the above technical solution, in addition to electrically detecting the diodes, the present application also proposes to perform graffiti processing, such as printing words, on the surface of the diodes that pass the electrical detection. After the printing is completed, drying will be carried out, and then the surface image of the diodes will be taken to analyze the graffiti effect of the diodes.

[0013] Preferably, the drying assembly includes a lifting plate, a drying hood, and a heat source conveyor. The drying hood and the lifting plate are both arranged on the frame, and the drying hood and the lifting plate jointly enclose a heating space, which is located on the transmission path of the diode when it is transmitted by the transmission mechanism. The heat source conveyor includes a first heat source arranged on the side wall of the drying hood facing the heating space and a second heat source arranged on the side of the lifting plate facing the heating space.

[0014] By adopting the above technical solution, when the diode passes through the heating space, the lifting plate is located below the diode, and the drying hood is located on the periphery above the diode. In this application, heat sources (i.e., the first heat source and the second heat source) are provided on both the drying hood and the lifting plate, so as to improve the drying uniformity of the diode in this way and accelerate the drying efficiency.

[0015] Preferably, a limiting plate is further arranged on the inner wall of the drying hood along the length direction of the heating space. The limiting plate is provided with a limiting hole for the diode lead to penetrate and insert. The limiting hole is wavy.

[0016] By adopting the above technical solution, the setting of the limiting plate and the limiting hole can enable the diode to extend its residence time in the heating space under the limiting action of the limiting hole during the transmission process with the transmission mechanism, thereby optimizing the drying sufficiency of the diode.

[0017] Preferably, the screening assembly includes a paddle, a receiving plate, and a waste box. The paddle is rotatably connected to the frame, and the diode lead transmitted by the transmission mechanism can move to the movement path of the paddle as the transmission mechanism transmits. The paddle is used to push the diode transmitted by the transmission mechanism onto the receiving plate during rotation. The waste box is open at the top and is located at one end of the receiving plate. One end of the receiving plate close to the waste box is inclined downward.

[0018] By adopting the above technical solution, when a diode with an unqualified electrical detection result appears, the paddle can be driven to rotate so that the diode to be screened can move to the rotation path of the paddle. When the diode moves to the rotation path of the paddle, it drives the paddle to rotate to push the diode onto the receiving plate, and then the paddle rotates back to its original position. The diode on the receiving plate can fall into the waste box under its own weight, realizing the screening of unqualified diodes.

[0019] Preferably, the waste box is slidably connected to the frame through a spring. The transmission mechanism includes a driving motor for driving chain transmission, and a cam is also sleeved on the driving shaft of the driving motor. When the spring is not deformed, the waste box is located on the rotation path of the cam.

[0020] By adopting the above technical solution, the transmission drive of the diode is realized by driving the sprocket transmission with the help of a driving motor, which drives the waste box to slide back and forth, so that the substandard diodes received in the waste box can be evenly distributed through the reciprocating sliding and shaking of the waste box, avoiding the substandard diodes from being concentrated in a certain position of the waste box.

[0021] Preferably, the receiving plate is rotatably connected to the frame via a rotating shaft, and a limiting torsion spring is provided on the rotating shaft, one end of the limiting torsion spring is connected to the receiving plate, and the other end is connected to the frame; the limiting torsion spring is always in a deformed state, and the top wall of the waste box is provided with a yielding arc surface for contacting with the end wall of the receiving plate, and the yielding arc surface is used to make the receiving plate swing under the elastic force of the limiting torsion spring during the reciprocating sliding of the waste box.

[0022] By adopting the above technical solution, the receiving plate is driven to swing back and forth with the help of the elastic force of the limiting torsion spring and the reciprocating sliding of the waste box, and the receiving plate is always tilted downward in the direction close to the waste box during the swinging process. The swinging setting can help the diodes on the receiving plate fall into the waste box, thereby improving the screening effect.

[0023] In a second aspect, the present application further provides a method for detecting electrical properties of a bypass diode, which is applied to the electrical property detection system of the bypass diode as described in the first aspect, comprising: The diodes are transported one by one to the location of the electrical property detection mechanism through the transmission mechanism; the first conductive electrode sheet is driven to move through the first driving member so that the first conductive electrode sheet contacts the transported diodes to achieve electrical connection; Applying a forward voltage and a reverse voltage to the first conductive electrode sheet respectively through a controller, and recording electrical parameters when the forward voltage and the reverse voltage are applied respectively through the controller; The controller determines whether the diode currently electrically connected to the first conductive electrode sheet meets the detection standards based on the electrical parameters. If not, the screening component is controlled to screen out the diodes that do not meet the standards.

[0024] In summary, this application includes the following beneficial technical effects: The present application transmits diodes one by one through a transmission mechanism, drives the first conductive electrode plate to move through a first driving member, so that the first conductive electrode plate is electrically connected to the transmitted diodes one by one, and then passes current into the first conductive electrode plate through a controller, so that a forward voltage or a reverse voltage is applied to the first conductive electrode plate, and records the current data to realize the detection of the diodes. Finally, the controller controls the screening component based on the detection results to automatically screen defective products, and replaces manual detection with machine detection to improve detection efficiency and accuracy. At the same time, unified detection of all diodes is used instead of random inspection to avoid the problem of incomplete detection caused by missed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of an electrical property detection system for a bypass diode disclosed in an embodiment of the present application.

[0026] Figure 2 It is a structural block diagram of an electrical property detection system for a bypass diode disclosed in an embodiment of the present application.

[0027] Figure 3 It is a schematic structural diagram for embodying a transmission mechanism and a polarity unification mechanism in an embodiment of the present application.

[0028] Figure 4 It is a schematic diagram for embodying the structure of a leveling mechanism in an embodiment of the present application.

[0029] Figure 5 It is a schematic diagram for embodying the structure of an electrical property detection mechanism in an embodiment of the present application.

[0030] Figure 6 It is a cross-sectional view for embodying the structure of a screening component in an embodiment of the present application.

[0031] Figure 7 It is a schematic diagram for embodying the structures of a drying component and a visual appearance detection component in an embodiment of the present application.

[0032] Figure 8 It is a cross-sectional view for embodying the structure of a drying component in an embodiment of the present application.

[0033] Explanation of reference numerals: 1, frame; 2, transmission mechanism; 21, vibrating sieve plate; 22, first track; 23, second track; 24, chain; 25, tooth block; 26, transition disk; 27, driving motor; 3, polarity unification mechanism; 31, second conductive electrode plate; 32, second driving member; 33, turntable; 331, feeding end; 332, discharging end; 34, dial rod; 35, limiting arc plate; 36, clamping jaw; 37, clamping piece; 4, leveling mechanism; 41, leveling wheel; 42, leveling backing plate; 5, electrical property detection mechanism; 51, first conductive electrode plate; 52, first driving member; 6, scribbling component; 61, first roller; 62, second roller; 63, paint box; 7, drying component; 71, drying hood; 72, lifting plate; 73, limiting plate; 731, limiting hole; 8, visual appearance detection component; 81, light source; 82, imaging device; 9, controller; 91, screening component; 911, paddle; 912, receiving plate; 913, waste box; 914, limiting torsion spring; 915, relief arc surface; 917, cam. Detailed implementation manners

[0034] The following further elaborates on the present application Figure 1-8 with reference to the appended

[0035] An embodiment of the present application discloses an electrical property detection system for a bypass diode. Refer to Figure 1 and Figure 2 , the electrical property detection system for the bypass diode includes a frame 1, on which a transmission mechanism 2 for transmitting diodes is provided. Along the transmission direction of the diodes (i.e., Figure 1 the direction indicated by arrow C), a polarity unification mechanism 3, a flattening mechanism 4, an electrical property detection mechanism 5, a graffiti component 6, a drying component 7, and a visual appearance detection component 8 are sequentially arranged. It also includes a controller 9 and a screening component 91. The transmission mechanism 2, the polarity unification mechanism 3, the flattening mechanism 4, the electrical property detection mechanism 5, the graffiti component 6, the drying component 7, the visual appearance detection component 8, and the screening component 91 are all controlled by the controller 9. Among them, the polarity unification mechanism 3 is used to adjust the position distribution of the cathodes and anodes of the diodes during transmission, so that all the anodes of the transmitted diodes and all the cathodes of the transmitted diodes are respectively located on the same side of the transmission direction. The flattening mechanism 4 is used to straighten the diode leads, the electrical property detection mechanism 5 is used to electrically connect with the diodes and detect the electrical parameters (such as current data) after electrical connection of the diodes, the graffiti component 6 is used to print marks on the diode surface, the drying component 7 is used to perform a drying treatment on the diode surface, the visual appearance detection component 8 is used to take images of the diode surface, and the controller 9 is used to control the screening component 91 to screen out the non-compliant diodes when the electrical parameters detected by the electrical property detection mechanism 5 do not meet the standards, or when the images taken by the visual appearance detection component 8 do not meet the standards.

[0036] Refer to Figure 1 , Figure 2 and Figure 3, Specifically, the transmission mechanism 2 includes a vibrating sieve plate 21 and a first track 22 connected to the discharge end 332 of the vibrating sieve plate 21. Through holes for the diodes to pass through are formed in the side wall of the first track 22 along its height direction. The polarity unifying mechanism 3 is located below the first track 22. The polarity unifying mechanism 3 includes a second conductive electrode plate 31, a second driving member 32, a turntable 33, a dial rod 34, a limiting arc plate 35, and a plurality of clamping jaws 36; the turntable 33 is rotatably connected to the frame 1, and its rotation direction is as shown by the dotted arrow in the figure. The turntable 33 includes a feeding end 331 and a discharging end 332. The feeding end 331 of the turntable 33 is located at the lower discharging port position of the first track 22 for receiving the diodes output from the first track 22; the clamping jaws 36 are evenly distributed on the turntable 33 along the circumferential direction of the turntable 33, and the clamping jaws 36 can be regarded as manipulators that can automatically clamp and release the diodes. Correspondingly, when the clamping jaws 36 are at the feeding end 331 of the device, the clamping jaws 36 open to receive a single diode output from the first track 22 and clamp the diode when turning away from the feeding end 331. In addition, a clamping piece 37 for contacting the diode is rotatably connected to the end of the clamping jaw 36. The discharging end 332 of the turntable 33 is located below the turntable 33. When the clamping jaws 36 turn from the feeding end 331 to the discharging end 332, the clamping jaws 36 will release the diodes they hold. Correspondingly, the transmission mechanism 2 further includes a second track 23 for receiving the diodes output from the discharging end 332 of the turntable 33.

[0037] The second conductive electrode plate 31, the dial rod 34, and the limiting arc plate 35 are sequentially arranged along the rotation direction of the turntable 33, and are all rotatably connected to the frame 1 and located outside the turntable 33. The second driving member 32 is specifically a motor, and the driving end of the second driving member 32 is connected to the second conductive electrode plate 31 to drive the second conductive electrode plate 31 to rotate; correspondingly, the controller 9 is pre-electrically connected to a motor for controlling the rotation of the dial rod 34. The rotation path of the second conductive electrode plate 31 intersects with the rotation path of the diodes on the turntable 33 along with the rotation of the turntable 33 (hereinafter simply referred to as path A), and the rotation path of the dial rod 34 also intersects with path A.

[0038] When the diodes on the turntable 33 rotate to a position close to the second conductive electrode plate 31, by driving the second conductive electrode plate 31 to rotate towards the turntable 33 through the second driving member 32, it can make the second conductive electrode plate 31 contact the two lead wires of the diode at the same time (that is Figure 3In the state shown, a circuit is implemented. At this time, a positive voltage is applied to the second conductive electrode plate 31 through the power supply and wires pre-connected by the controller 9, and the current data in the circuit is collected. Then, a reverse voltage is applied, and the current data in the circuit is collected. The controller 9 is used to compare the current data when the positive voltage is applied with the preset reference data, and compare the current data when the reverse voltage is applied with the preset reference data to determine whether the diode under test is forward-conducting and reverse-cutoff. If not, it is considered that the diode needs to be reversed. The controller 9 is used to rotate the driving lever 34 towards the turntable 33 to a predetermined position. This predetermined position satisfies: when the lever 34 rotates in the reverse direction (i.e., away from the turntable 33), the rotation path of the lever 34 at this time intersects with path A. Then, when the diode that needs to be reversed moves to a position close to the lever 34, the reverse rotation of the lever 34 can contact the lead of the diode and drive the diode and the clip 37 to rotate relative to the jaw 36. Since the diode will be at the limiting arc plate 35 of the turntable 33 device during the self-rotation process, at this time, the limiting arc plate 35 will use its limiting effect on the diode to assist the diode to complete a 180° flip. For the diodes that do not need to be reversed, the lever 34 will be rotated to a position away from the rotation path of the diode following the turntable 33, that is, the diodes that do not need to be reversed will not contact the lever 34, but when they are rotated to the limiting arc plate 35, they will always maintain the initial state (i.e., the state when they are clamped by the jaw 36 at the feeding end 331 of the turntable 33) under the limiting action of the limiting arc plate 35 and move to the discharging end 332, ultimately ensuring that the anodes of all the diodes moving to the discharging end 332 are on the same side and the anodes are on the same side.

[0039] The transmission mechanism 2 further includes a plurality of groups of chains 24 arranged along the length direction of the second track 23. Each group of chains 24 corresponds to a driving motor 27, and tooth blocks 25 are also distributed at intervals along the length direction of each chain 24. A space for inserting a single diode is reserved between adjacent tooth blocks 25.

[0040] Refer to Figure 1 and Figure 4 As shown in, the leveling mechanism 4 includes a leveling wheel 41 rotatably connected to the frame 1 and a leveling backing plate 42 arranged below the leveling wheel 41. The leveling wheel 41 is provided with a relief hole for the tooth block 25 to pass through. The leveling backing plate 42 is arranged along the length direction of the second track 23, and the leveling backing plate 42 is located between the chains 24. A gap that only allows the lead of a single diode to pass through is reserved between the leveling wheel 41 and the leveling backing plate 42, and this gap is located on the transmission path when the diode is transmitted by the chains 24 and the tooth blocks 25. That is, during the transmission of the diode, its lead will pass through the gap and be straightened under the pressing of the leveling wheel 41 and the leveling backing plate 42 when passing through the gap.

[0041] Refer to Figure 1 、Figure 2 and Figure 5 The transmission mechanism 2 also includes a transition plate 26, which is rotatably connected to the frame 1 at a position close to the electrical detection mechanism 5. The surface of the transition plate 26 is also provided with tooth blocks 25 along its circumference, and space for inserting a single diode is reserved between adjacent tooth blocks 25. The electrical detection mechanism 5 includes a first conductive electrode sheet 51 and a first driving member 52. The first driving member 52 is specifically a motor and is connected to the first conductive electrode sheet 51 to drive the first conductive electrode sheet 51 to rotate. The first conductive electrode sheet 51 is arranged on one side of the frame 1 close to the transition plate 26, and there is an intersection between the rotation path of the first conductive electrode sheet 51 and the rotation path of the diode when it rotates with the transition plate 26. That is, when the diode rotates close to the first conductive electrode sheet 51 driven by the transition plate 26, the first conductive electrode sheet 51 can be driven by the first driving member 52 to rotate in the direction close to the diode, and the first conductive electrode sheet 51 is simultaneously in contact with the pins at both ends of the diode to form a loop. At this time, the power supply and wires pre-connected by the controller 9 are used to apply a forward voltage to the first conductive electrode sheet, and the current data in the loop is collected. Accordingly, two electrical detection mechanisms 5 can be set to be electrically connected to the diode and apply a reverse voltage, and collect the current data in the loop. The controller 9 is used to compare the current data when the forward voltage is applied with the preset reference data, and compare the current data when the reverse voltage is applied with the preset reference data to determine whether the diode under test is forward conducting and reverse cutoff. The determination result can be displayed on a pre-connected display screen. If not, the diode is considered to be a substandard defective product.

[0042] For defective products, the controller 9 is used to control the screening component 91 to remove them from the second track 23. Specifically, the screening component 91 is arranged in a one-to-one correspondence with the transition plate 26. The screening component 91 includes a paddle 911, a receiving plate 912 and a waste box 913. The paddle 911 is rotatably connected to the outer periphery of the corresponding transition plate 26, and the controller 9 is pre-connected with a motor for driving the paddle 911 to rotate. The rotation path of the paddle 911 and the rotation path of the diode rotating with the transition plate 26 have an intersection, so the paddle 911 is moved closer to the transition plate 26. direction to a specified position, so that when the paddle 911 rotates in the direction away from the second transition disk 26 at the specified position, the rotation path of the paddle 911 and the rotation path of the diode rotating with the transition disk 26 intersect. Then, when the substandard diode rotates to the rotation path of the paddle 911 with the rotation of the transition disk 26, driving the paddle 911 to rotate in the direction away from the transition disk 26 will drive the substandard diode to detach from the transition disk 26, and fall onto the receiving plate 912 under the action of its own weight and the push of the paddle 911.

[0043] Reference Figure 5 and Figure 6, the receiving plate 912 is rotatably connected to the frame 1 through a rotating shaft, and a limiting torsion spring 914 is sleeved on the rotating shaft. The limiting torsion spring 914 is always in a deformed state and has a tendency to drive the receiving plate 912 to rotate towards the waste box 913. The waste box 913 is located at one end of the receiving plate 912, and one end of the receiving plate 912 close to the waste box 913 is always inclined downward under the elastic force of the limiting torsion spring 914. The waste box 913 is slidably connected to the frame 1 through a spring, so that the waste box 913 can reciprocate towards or away from the receiving plate 912. The upper end of the waste box 913 is open, and the top end of the waste box 913 is located below the receiving plate 912, so that the receiving plate 912 abuts against the top wall of the waste box 913 under the elastic force of the limiting torsion spring 914. A relief arc surface 915 is provided on the lower surface of the receiving plate 912 for contacting the waste box 913. The relief arc surface 915 is used to further incline the end of the receiving plate 912 close to the waste box 913 downward when the waste box 913 moves away from the receiving plate 912. In addition, a cam 917 is fixedly sleeved on the drive motor 27 corresponding to the chain 24 near the waste box 913. A relief surface for contacting the cam 917 is provided on the side wall of the waste box 913 facing away from the receiving plate 912. The relief surface is used to make the waste box 913 move towards the receiving plate 912 under the pushing of the cam 917 when contacting the cam 917. When the cam 917 disengages from the waste box 913, the waste box 913 will move back to its original position away from the receiving plate 912 under the action of the spring.

[0044] Refer to Figure 7 and Figure 8 , the graffiti assembly 6 includes a first roller 61 and a second roller 62 rotatably connected to the frame 1, and a paint box 63 containing paint. The number of the first rollers 61 is 2. The two first rollers 61 are tangent to each other, and one of the first rollers 61 is in contact with the second roller 62. The other first roller 61 is partially inserted into the paint box 63 for contacting the paint and adhering the paint to the surface of the second roller 62 when contacting the second roller 62. The second roller 62 is used to contact the surface of the diode conveyed on the chain 24, so as to adhere the paint adhered to the second roller 62 to the surface of the diode.

[0045] Refer to Figure 7 and Figure 8, the drying component 7 includes a drying cover 71 covering the periphery of the second track 23, a lifting plate 72 arranged on the second track 23 along the length direction of the second track 23, and a heat source conveying member; the drying cover 71 and the lifting plate 72 enclose a heating space through which the diodes transmitted on the second track 23 pass through, and the heating space is located on the transmission path of the aforementioned diodes. The heat source conveying member includes a first heat source arranged on the side wall of the drying cover 71 facing the heating space and a second heat source arranged on the side of the lifting plate 72 facing the heating space; the first heat source and the second heat source can specifically be heating wires connected to an external power source for drying the diodes after graffiti printing from multiple angles.

[0046] A limiting plate 73 is further arranged on the inner wall of the drying cover 71 along the length direction of the heating space. The limiting plate 73 is provided with a limiting hole 731 along its length direction. For the diodes entering the heating space, their pins will be inserted into the limiting holes 731, and the limiting holes 731 are wavy. So that while the diodes move due to the transmission of the chain 24 and the tooth blocks 25, they move up and down and even rotate under the limiting action of the limiting holes 731, thereby optimizing to enable them to be in full contact with the heat source and optimizing the drying effect.

[0047] Refer to Figure 2 and Figure 7 , the visual appearance detection component 8 specifically includes a light source 81 and a camera device 82. The light source 81 irradiates on the second track 23, and the camera device 82 is located above the light source for taking images of the diodes passing under the light source 81. The controller 9 is used to obtain the aforementioned images and compare the images with a preset reference image to analyze the printing effect, and finally display the analysis result through a pre-connected display screen. The analysis result specifically includes the images taken by the camera device 82 and the result of whether it meets the standard. For the diodes that do not meet the standard, a transition disk 26 and a screening component 91 can also be arranged at the visual appearance detection component 8, and the screening component 91 is controlled by the controller 9 to screen out the non-compliant diodes. A good product receiving box can be arranged at one end of the rack 1 away from the vibrating sieve plate 21 for receiving the diodes on the second track 23 that are not screened out by the screening component 91.

[0048] The embodiment of the present application also discloses an electrical property detection method for bypass diodes, including the following steps: The diodes are conveyed one by one to the position where the electrical property detection mechanism 5 is located through the transmission mechanism 2; the first conductive electrode piece is driven by the first driving member to move so that the first conductive electrode piece is in electrical connection with the conveyed diode; A positive voltage and a negative voltage are respectively applied to the first conductive electrode piece through the controller 9, and the controller 9 respectively records the electrical parameters when the positive voltage and the negative voltage are applied; Based on the electrical parameters, the controller 9 determines whether the diode currently electrically connected to the first conductive electrode plate passes the detection. If it does not pass, the screening component 91 is controlled to screen out the non-compliant diodes.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electrical property detection system for a bypass diode, characterized in that: The invention comprises a frame (1), on which a transmission mechanism (2), an electrical property detection mechanism (5), a controller (9) and a screening component (91) are arranged; the transmission mechanism (2) is used to transmit diodes one by one, the electrical property detection mechanism (5) and the screening component (91) are both controlled by the controller (9), the electrical property detection mechanism (5) comprises a first conductive electrode sheet (51) and a first driving member (52), the first driving member (52) is used to drive the first conductive electrode sheet (51) to move and contact with the transmitted diode to achieve electrical connection, the controller (9) is used to apply voltage to the first conductive electrode sheet (51) and obtain electrical parameters, the electrical parameters at least comprising current data flowing through the first conductive electrode sheet (51); the controller (9) is also used to control the screening component (91) to screen out defective products based on the obtained electrical parameters.

2. The electrical property detection system of the bypass diode according to claim 1, characterized in that: The invention also comprises a polarity unification mechanism (3), wherein the polarity unification mechanism (3) and the electrical property detection mechanism (5) are arranged in sequence along the transmission direction of the diode; the polarity unification mechanism (3) comprises a second conductive electrode sheet (31), a second driving member (32), a rotating disk (33), a plurality of clamping claws (36) rotatably connected to the rotating disk (33), a lever (34) rotatably connected to the frame (1), and a limiting arc plate (35) arranged on the frame (1); the rotating disk (33) is provided with a feeding end (331) and a discharging end (332), the clamping claws (36) are arranged along the rotation direction of the rotating disk (33), and each clamping claw (36) is used to clamp or release a diode; the transmission mechanism (2) is used to supply a diode to the clamping claw (36) rotated to the feeding end (331) of the rotating disk (33), and is used to receive a diode released by the clamping claw (36) at the discharging end (332) of the rotating disk (33); The second conductive electrode sheet (31) and the lever (34) are arranged in sequence along the rotation direction of the turntable (33); the second driving member (32) is used to drive the second conductive electrode sheet (31) to move and contact with the diode on the clamp (36) to achieve electrical connection; the controller (9) is used to apply voltage to the second conductive electrode sheet (31) and obtain electrical parameters, wherein the electrical parameters at least include current data flowing through the second conductive electrode sheet (31); the controller (9) is used to control whether the lever (34) rotates based on the electrical parameters of the second conductive electrode sheet (31); and during the rotation of the lever (34), the diode moving with the turntable (33) can be located on the rotation path of the lever (34), so that the diode rotates 180° under the drive of the rotating lever (34).

3. The electrical property detection system of the bypass diode according to claim 1, characterized in that: The transmission mechanism (2) comprises a chain (24) connected to the frame (1) for transmission, a plurality of tooth blocks (25) are arranged on the surface of the chain (24) and on both sides thereof at intervals along the transmission direction of the chain (24), and a space for inserting a single diode lead is reserved between two adjacent tooth blocks (25) on the same side; the transmission mechanism (2) also comprises a leveling mechanism (4), the leveling mechanism (4) and the electrical property detection mechanism (5) are arranged in sequence along the diode transmission direction; the leveling mechanism (4) comprises a leveling wheel (41) rotatably connected to the frame (1) and a leveling pad (42) arranged below the leveling wheel (41), the leveling wheel (41) is located above the moving path of the diode lead when it moves with the chain (24), and a gap is reserved between the leveling wheel (41) and the leveling pad (42) for only a few diode leads to pass through.

4. The electrical property detection system of the bypass diode according to claim 1, characterized in that: The invention also comprises a graffiti component (6), a drying component (7) and a visual appearance detection component (8); the electrical property detection mechanism (5), the graffiti component (6), the drying component (7) and the visual appearance detection component (8) are arranged in sequence along the transmission direction of the diode; the graffiti component (6) is used to print on the surface of the diode; the drying component (7) is used to dry the surface of the diode after the printing process; the visual appearance detection component (8) is electrically connected to a controller (9) to obtain an image of the diode surface after the drying process; the controller (9) is used to analyze the image detected by the visual appearance detection component (8) and analyze the printing effect based on the image, and finally output the analysis result.

5. The electrical property detection system of the bypass diode according to claim 4, characterized in that: The drying component (7) comprises a lifting plate (72), a drying cover (71), and a heat source conveying member. The drying cover (71) and the lifting plate (72) are both arranged on the frame (1), and the drying cover (71) and the lifting plate (72) together enclose a heating space. The heating space is located on a transmission path when the diode is transmitted by the transmission mechanism (2). The heat source conveying member comprises a first heat source arranged on a side wall of the drying cover (71) facing the heating space, and a second heat source arranged on a side of the lifting plate (72) facing the heating space.

6. The electrical property detection system of the bypass diode according to claim 5, characterized in that: A limiting plate (73) is also provided on the inner wall of the drying cover (71) along the length direction of the heating space, and a limiting hole (731) for the diode lead to pass through and be inserted is opened on the limiting plate (73), and the limiting hole (731) is in a wave shape.

7. The electrical property detection system of the bypass diode according to claim 1, characterized in that: The screening assembly (91) comprises a paddle (911), a receiving plate (912) and a waste box (913); the paddle (911) is rotatably connected to the frame (1); and the diode lead wire transmitted by the transmission mechanism (2) can move to the moving path of the paddle (911) along with the transmission of the transmission mechanism (2); the paddle (911) is used to push the diode transmitted by the transmission mechanism (2) onto the receiving plate (912) during the rotation process; the waste box (913) is open at the top and is located at one end of the receiving plate (912); and one end of the receiving plate (912) close to the waste box (913) is arranged to be tilted downward.

8. The electrical property detection system of the bypass diode according to claim 7, characterized in that: The waste box (913) is connected to the frame (1) by spring sliding, and the transmission mechanism (2) includes a driving motor (27) for driving the chain (24). A cam (917) is also sleeved on the driving shaft of the driving motor (27). When the spring is not deformed, the waste box (913) is located on the rotation path of the cam (917).

9. The electrical property detection system of the bypass diode according to claim 8, characterized in that: The receiving plate (912) is rotatably connected to the frame (1) via a rotating shaft, and a limiting torsion spring (914) is provided on the rotating shaft, one end of the limiting torsion spring (914) is connected to the receiving plate (912), and the other end is connected to the frame (1); the limiting torsion spring (914) is always in a deformed state, and the top wall of the waste box (913) is provided with a yielding arc surface (915) for contacting the end wall of the receiving plate (912); the yielding arc surface (915) is used to make the receiving plate (912) swing under the elastic force of the limiting torsion spring (914) during the reciprocating sliding of the waste box (913).

10. A method for detecting electrical properties of a bypass diode, applied to the system for detecting electrical properties of a bypass diode as claimed in claim 1, characterized in that: include: The diodes are transported one by one to the location of the electrical property detection mechanism (5) through the transmission mechanism (2); The first conductive electrode sheet (51) is driven to move by a first driving member (52), so that the first conductive electrode sheet (51) contacts the diode being transmitted to achieve electrical connection; A forward voltage and a reverse voltage are applied to the first conductive electrode sheet (51) through a controller (9), and electrical parameters when the forward voltage and the reverse voltage are applied are recorded through the controller (9); The controller (9) determines whether the diode currently electrically connected to the first conductive electrode sheet (51) meets the detection standard based on the electrical parameters. If it does not meet the standard, the screening component (91) is controlled to screen out the diode that does not meet the standard.

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