Stress-improved axial bypass photovoltaic diode and processing technology thereof

Abstract

The invention relates to a stress improvement type axial bypass photovoltaic diode and a processing technology thereof, and relates to the technical field of photovoltaic bypass diodes, the stress improvement type axial bypass photovoltaic diode comprises two wires and a bypass diode chip, the wires are divided into an anode lead and a cathode lead, the end parts of the anode lead and the cathode lead are integrally provided with welding circular truncated cones, and the welding circular truncated cones are arranged on the bypass diode chip. The diameter of the welding circular truncated cone is larger than that of the wire, butt joint grooves are formed in the end face of the side, away from the wire, of the welding circular truncated cone, butt joint protruding blocks are integrally formed on the two end faces of the bypass diode chip, and the butt joint protruding blocks correspond to the butt joint grooves in a one-to-one mode and are inserted into the butt joint grooves. The welding circular truncated cone on the anode lead is fixed with one end face of the bypass diode chip through soldering tin, and the welding circular truncated cone on the cathode lead is fixed with the other end face of the bypass diode chip through soldering tin. The application has the effect of improving the welding stability of the wire and the bypass diode chip and the qualified rate of finished products.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic bypass diodes, and in particular to a stress-improved axial bypass photovoltaic diode and a processing technology thereof. Background Art

[0002] During the use of solar cell modules, some parts may be shielded, which then consumes energy and generates heat as a load. This is the hot spot effect, which has a serious destructive effect on the module. By connecting a bypass diode in parallel at both ends of the solar cell module, the hot spot effect can be effectively avoided to damage the cell module. With the development of large silicon wafers, double-sided double-glass and other technologies in the photovoltaic module industry, the power of the module is constantly increasing, and higher requirements are also placed on the current carrying capacity of the diode.

[0003] In the prior art, an axial bypass photovoltaic diode is provided, which includes two wires and a bypass diode chip. The wires are divided into an anode lead and a cathode lead. The anode lead is fixed to one end of the bypass diode chip by soldering, and the cathode lead is fixed to the bypass diode chip by soldering.

[0004] With regard to the above-mentioned related technologies, when the wire and the bypass diode chip are fixed by soldering, it is difficult to ensure the stability of the wire and the bypass diode chip when they are in contact. The wire or the bypass diode chip is easy to move, resulting in insufficient welding area between the wire and the bypass diode chip, and even causing cold welding, affecting the qualified rate of the finished product. Summary of the invention

[0005] In order to improve the stability of welding between the wire and the bypass diode chip and the qualified rate of the finished product, the present application provides a stress-improved axial bypass photovoltaic diode and a processing technology thereof.

[0006] In the first aspect, a stress-improved axial bypass photovoltaic diode provided in the present application adopts the following technical solution: it includes two wires and a bypass diode chip, the wires are divided into an anode lead and a cathode lead, the ends of the anode lead and the cathode lead are integrally formed with a welding cone, the diameter of the welding cone is larger than the diameter of the wire, a docking groove is provided on the end face of the welding cone facing away from the wire, and docking protrusions are integrally formed on both end faces of the bypass diode chip, the docking protrusions correspond to the docking grooves one by one and are inserted into the docking grooves; the welding cone on the anode lead is fixed to one end face of the bypass diode chip by soldering, and the welding cone on the cathode lead is fixed to the other end face of the bypass diode chip by soldering.

[0007] By adopting the above technical solution, when welding the anode lead, the cathode lead and the bypass diode chip, the docking bump can be embedded in the corresponding docking groove, thereby positioning the bypass diode chip and the wire, ensuring that the bypass diode chip and the wire will not move during the soldering process, ensuring sufficient welding area, reducing the occurrence of cold solder joints, and thereby improving the qualified rate of finished products.

[0008] Optionally, it also includes an injection molded shell, in which the welding cone of the anode lead and the cathode lead and the bypass diode chip are all wrapped.

[0009] By adopting the above technical solution, the injection molded shell can provide effective protection for the welding cone of the anode lead and the cathode lead and the bypass diode chip, and try to avoid them from external physical collision, chemical corrosion, and intrusion of dust, water vapor, etc., thereby significantly enhancing the stability and durability of the diode and extending its service life.

[0010] Optionally, a stress chamfer is provided at the edge of the welding truncated cone of the anode lead, and the stress chamfer is provided on the side of the welding truncated cone facing the bypass diode chip. By adopting the above technical solution, relying on the combined structure of the stress chamfer of the welding cone on the anode lead and the stress-free chamfer of the welding cone on the cathode lead, the thermal stress at the edge of the bypass diode chip is concentrated on the anode surface of the bypass diode chip, and then the thermal stress is completely buffered and released by means of solder and the bypass diode chip, thereby alleviating the stress problem of the chip and improving the reliability of the photovoltaic diode and the entire battery assembly.

[0011] In a second aspect, the present application provides a stress-improved axial bypass photovoltaic diode processing technology that adopts the following technical solution, including the following steps: S1. Cut the long wires on the wire coil material into short wires by cutting and punching equipment, and punch the ends of the wires; S2, fix the welding truncated table and the bypass diode chip by soldering with tin wire; S3, forming an injection-molded shell by injection molding on the welding truncated cone of the anode lead and the cathode lead and the outside of the bypass diode chip.

[0012] In the third aspect, a cutting and stamping equipment provided in the present application adopts the following technical solution: it includes a workbench, on which a feeding mechanism, a cutting assembly, a fixed clamp, and a stamping mechanism are provided, the feeding mechanism is used to pull the long wire to move and send the long wire to the fixed clamp; the fixed clamp is used to clamp the long wire, the cutting assembly is used to cut the long wire, the stamping mechanism is used to stamp the end of the wire, the stamping mechanism includes a sliding block, a stamping end block, and a sliding member, the sliding block is slidably matched with the workbench, the stamping end block is fixedly connected to one end of the sliding block toward the fixed clamp, and the sliding member is used to drive the sliding block to slide in a direction close to or away from the fixed clamp.

[0013] By adopting the above technical solution, the feeding mechanism can automatically transport the long wire to the fixing clamp. After the fixing clamp clamps the long wire, the cutting assembly cuts the long wire into the required length; at the same time, the sliding member drives the sliding block to drive the stamping end block to perform multiple continuous stamping on the cut wire end to form a welding cone.

[0014] Optionally, a connecting guide rod is arranged between the stamping end block and the sliding block, one end of the connecting guide rod is fixedly connected to the stamping end block, and the other end of the connecting guide rod is fixedly connected to the sliding block; a movable plate is slidingly arranged on the connecting guide rod, and a stamping protrusion is fixed on one end of the movable plate facing the stamping end block for stamping to form a docking groove, a through hole is opened on the stamping table for the stamping protrusion to pass through, and the through hole and the stamping protrusion are adapted to each other, and a state adjustment component is arranged on the sliding block, and the state adjustment component is used to drive the movable plate to slide, so as to drive the stamping protrusion to extend out of the through hole to one end facing the fixed clamp or retract into the through hole.

[0015] By adopting the above technical scheme, in the process of the sliding block driving the stamping end block to perform multiple continuous stamping on the end of the wire, during the first few stampings, the state adjustment component drives the stamping convex rod to retract into the through hole, and the convex rod will not interfere with the stamping and forming of the welding truncated cone, so that the welding truncated cone can form a cylinder; and during the last stamping, the state adjustment component drives the stamping convex rod to extend out of the through hole, and the stamping convex rod stamps the welding truncated cone, thereby forming a docking groove on the welding truncated cone, thereby completing the processing of the welding truncated cone and the processing of the docking groove in sequence, and effectively improving the production efficiency.

[0016] Optionally, the state adjustment component includes a cam, a tension spring, and a rotating component, wherein the cam rotates on the side wall of the sliding block; the tension spring is arranged between the sliding block and the movable plate, one end of the tension spring is fixedly connected to the sliding block, and the other end of the tension spring is fixedly connected to the movable plate, and the tension spring drives the movable plate to approach the sliding block to drive the movable plate to abut against the peripheral wall of the cam; the rotating component drives the cam to rotate intermittently.

[0017] By adopting the above technical solution, in the process of the sliding block driving the stamping end block to perform multiple continuous stamping on the end of the wire, the rotating component drives the cam to rotate intermittently for one circle. During the first few stampings, the non-protruding part of the cam contacts the movable plate, and the tension spring pulls the movable plate back, so that the stamping protrusion retracts into the through hole. During the last stamping, the protruding part of the cam contacts the movable plate, overcoming the tension of the tension spring, pushing the movable plate to move toward the stamping end block, so that the stamping protrusion extends out of the through hole.

[0018] Optionally, the rotating component includes a ratchet, a locking pawl, a deflection rod, a toggle pawl, a sliding round rod, a first torsion spring, and a second torsion spring; the ratchet is coaxially fixed to the cam, the deflection rod is rotationally connected to the ratchet, the toggle pawl is rotationally connected to the top end of the deflection rod, the first torsion spring is arranged between the toggle pawl and the top end of the deflection rod, and the first torsion spring drives the toggle pawl to abut against the ratchet; the deflection rod is provided with a sliding groove along the length direction, the sliding round rod is fixedly connected to the workbench, and the sliding round rod is movably arranged in the sliding groove and abuts against the inner wall of the sliding groove; the locking pawl is rotatably arranged on the side wall of the sliding block, the second torsion spring is arranged between the locking pawl and the sliding block, and the second torsion spring drives the locking pawl to abut against the ratchet.

[0019] By adopting the above technical solution, during the reciprocating movement of the sliding block, the sliding round rod on the workbench rotates and cooperates with the sliding groove, thereby restraining one end of the deflection rod, and the other end of the deflection rod slides with the sliding table, thereby realizing the reciprocating swing of the deflection rod. When the workbench is away from the fixed frame, the ratchet is pushed to rotate a number of teeth, thereby driving the cam to rotate an angle to complete the change or maintenance of the state of the stamping convex rod. When the workbench is close to the fixed frame, the cam does not move, ensuring the accuracy and stability of each stamping action, and the locking ratchet can prevent the ratchet from rotating in the opposite direction.

[0020] Optionally, the cutting assembly includes a bracket, a tilting rod, a breaking knife, a deflection component, and a reset torsion spring. The bracket is fixedly set on a workbench, the tilting rod is rotatably matched with the bracket, the breaking knife is fixed at the end of the tilting rod, and the reset torsion spring is arranged between the tilting rod and the bracket. The reset torsion spring drives the breaking knife away from the long wire, and the deflection component is used to drive the tilting rod to overcome the elastic force of the reset torsion spring and deflect so that the breaking knife is close to the long wire.

[0021] By adopting the above technical solution, when it is necessary to cut a long wire, the deflection component drives the tilting rod to overcome the elastic force of the reset torsion spring and deflect, so that the cutting knife approaches the long wire and cuts it. After the cutting is completed, under the action of the reset torsion spring, the tilting rod is reset, and the cutting knife is away from the long wire, ready for the next cutting action.

[0022] Optionally, the deflection component includes a push rod, a rack, and an incomplete gear. The push rod slides vertically on the sliding block, the top of the push rod abuts against the side wall of the tilting rod, the rack is integrally formed on the side wall of the push rod, the incomplete gear is coaxially fixed with the cam, and the incomplete gear can engage with the rack.

[0023] By adopting the above technical solution, when the cam rotates, it drives the incomplete gear fixed coaxially with it to rotate. When the incomplete gear and the rack are meshed with each other, it will push the rack and the push rod to move vertically, and the top of the push rod pushes the tilting rod to overcome the elastic force of the reset torsion spring and deflect, thereby driving the broken knife to perform a cutting action. That is, during the process of the cam rotating one circle, a group of continuous stamping actions are performed on the end of the wire, and the broken knife is driven to perform only one cutting action, realizing the orderly coordination of the stamping and cutting actions, and improving the coordination of the equipment's actions.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the welding truncated table, docking groove and docking bump, it is ensured that the bypass diode chip and the wire will not move during the soldering process, ensuring sufficient welding area, reducing the occurrence of cold soldering, and thus improving the qualified rate of finished products; 2. By setting the sliding block, stamping end block, connecting guide rod, sliding piece, movable plate and stamping convex rod, the processing of the welding round table and the stamping of the docking groove can be completed on the same equipment, which improves the production efficiency, reduces the equipment cost and operation steps, and ensures the consistency of product quality; 3. By setting a cam, a tension spring, a ratchet, a locking pawl, a deflection rod, a toggle pawl, a sliding round rod, a first tightening torsion spring, and a second tightening torsion spring, the telescopic action of the stamping protrusion is controlled, and before the last stamping of the welding truncated table, the stamping protrusion is automatically extended out of the through hole to complete the stamping of the docking groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a stress-improved axial bypass photovoltaic diode structure provided in an embodiment of the present application; Figure 2 It is a schematic cross-sectional structure diagram of a stress-improved axial bypass photovoltaic diode provided in an embodiment of the present application; Figure 3 It is a structural schematic diagram of a cutting and punching device provided in an embodiment of the present application; Figure 4 This Figure 3 A magnified view of part A; Figure 5 This is a partial enlarged view of a cutting and punching device provided in an embodiment of the present application. In the figure, 1, bypass diode chip; 11, docking bump; 12, anode lead; 13, cathode lead; 14, welding truncated table; 141, docking groove; 142, stress chamfer; 15, injection molding shell; 2, workbench; 3, feeding mechanism; 4, cutting assembly; 41, bracket; 42, tilting rod; 43, cutting knife; 44, deflection component; 441, ejector rod; 442, roller; 443, incomplete gear; 45, reset torsion spring; 5, fixing clip; 6, stamping mechanism; 61, sliding block; 6 2. Stamping end block; 63. Connecting guide rod; 631. Movable plate; 6311. Stamping convex rod; 64. Sliding member; 65. State adjustment assembly; 651. Cam; 652. Tension spring; 6531. Ratchet; 6532. Locking pawl; 6533. Deflection rod; 6534. Push pawl; 6535. Sliding round rod; 6536. First tightening torsion spring; 6537. Second tightening torsion spring; 7. Wire coil; 8. Mounting frame; 81. Rotating frame; 82. Curved tube; 83. Power motor. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0027] The present application discloses a stress-improved axial bypass photovoltaic diode, referring to Figure 1 and Figure 2 , which includes two wires, a bypass diode chip 1, and an injection molded shell 15. Both wires are made of copper wire, and the bypass diode chip 1 is a Schottky diode chip. The wires are divided into an anode lead 12 and a cathode lead 13. The ends of the anode lead 12 and the cathode lead 13 are stamped with a welding truncated cone 14, and the diameter of the welding truncated cone 14 is larger than the diameter of the wire. A docking groove 141 is provided on the end surface of the welding truncated cone 14 away from the wire, and docking protrusions 11 are integrally formed on both end surfaces of the bypass diode chip 1, and the docking protrusions 11 correspond to the docking grooves 141 one by one and are adapted to each other.

[0028] Reference Figure 1 and Figure 2 During assembly, the butt bump 11 is inserted into the butt groove 141, and the wire will not move. The welding truncated cone 14 on the anode lead 12 is fixed to one end face of the bypass diode chip 1 by soldering, and the welding truncated cone 14 on the cathode lead 13 is fixed to the other end face of the bypass diode chip 1 by soldering. Finally, an injection molded shell 15 is formed by injection molding, and the welding truncated cones 14 of the anode lead 12 and the cathode lead 13 and the bypass diode chip 1 are all wrapped in the injection molded shell 15.

[0029] To distribute thermal stress, refer to Figure 1 and Figure 2A stress chamfer 142 is provided at the edge of the welding truncated cone 14 of the anode lead 12 . The stress chamfer 142 is provided at a side of the welding truncated cone 14 facing the bypass diode chip 1 .

[0030] The embodiment of the present application also discloses a processing technology of a stress-improved axial bypass photovoltaic diode, comprising the following steps: S1, cutting and punching the long wires on the wire coil 7 into short wires of small lengths by cutting and punching equipment, and punching the ends of the wires; S2, fix the welding truncated platform 14 and the bypass diode chip 1 by soldering with tin wire; S3 , forming an injection molded housing 15 by injection molding on the welding truncated cone 14 of the anode lead 12 and the cathode lead 13 and the outside of the bypass diode chip 1 .

[0031] The present application also discloses a cutting and punching device, referring to Figure 3 and Figure 4 The invention comprises a workbench 2 and a wire coil 7, on which a long wire as a raw material is wound. The workbench 2 is provided with a coiling mechanism, a feeding mechanism 3, a cutting assembly 4, a fixing clamp 5, and a punching mechanism 6.

[0032] Reference Figure 3 , the de-coiling mechanism is used to drive the long wire to shake quickly, so as to eliminate the curling tendency of the long wire after it is separated from the wire coil 7. Specifically, the de-coiling mechanism includes a mounting frame 8, a rotating frame 81, a curve tube 82, and a power motor 83. The mounting frame 8 is fixedly arranged at one end of the workbench 2, and the rotating frame 81 is rotatably arranged on the mounting frame 8. The curve tube 82 is bent along the axial direction of the rotating frame 81, and the curve tube 82 is fixedly connected to the rotating frame 81, and the long wire passes through the curve tube 82. The power motor 83 is fixed at the bottom of the mounting frame 8, and the power motor 83 drives the rotating frame 81 to rotate through a belt drive. When the power motor 83 is started, the rotating plate rotates and drives the long wire to shake quickly, eliminating the curling tendency of the long wire coil 7 wound around the wire coil 7, and preparing for subsequent feeding and processing.

[0033] Reference Figure 4 and Figure 5, the feeding mechanism 3 is used to pull the long wire to move and feed the long wire to the fixed clamp 5. Specifically, the feeding mechanism 3 is two electric clamps slidably arranged on the workbench 2, and the electric clamps slide between the decoiling mechanism and the fixed clamp 5, and the electric clamps are driven to slide by an electric push rod. When loading, the electric clamp clamps the long wire and approaches the fixed clamp 5 to pull the long wire to move, and then releases the long wire and resets to complete the loading. And the two electric clamps take turns to pull the long wire to move, so when one of the electric clamps releases the long wire, the other electric clamp clamps the long wire to ensure that the long wire is always constrained. The fixed clamp 5 is used to clamp the long wire. Specifically, the fixed clamp 5 is an electric clamp fixedly connected to the workbench 2. The cutting component 4 is used to cut the long wire.

[0034] Reference Figure 4 and Figure 5 , the punching mechanism 6 is used to punch the end of the wire, and the punching mechanism 6 includes a sliding block 61, a punching end block 62, and a sliding member 64. The sliding block 61 is slidably matched with the workbench 2, and the punching end block 62 is fixedly connected to one end of the sliding block 61 toward the fixed clamp 5, and the sliding member 64 is used to drive the sliding block 61 to slide in a direction close to or away from the fixed clamp 5. Specifically, a connecting guide rod 63 is provided between the punching end block 62 and the sliding block 61, one end of the connecting guide rod 63 is fixedly connected to the punching end block 62, and the other end of the connecting guide rod 63 is fixedly connected to the sliding block 61. The feeding mechanism 3 feeds the long wire to the fixed clamp 5, and the fixed clamp 5 clamps the long wire, and the end of the long wire is exposed from the side wall of the fixed clamp 5. The cutting component 4 cuts the long wire into the required length. At the same time, the sliding member 64 drives the sliding block 61 to drive the punching end block 62 to perform multiple continuous punching on the cut wire end to form a welding truncated table 14. The sliding member 64 can be a cylinder or an electric push rod.

[0035] In order to punch out the welding truncated platform 14, and then punch out the butt joint groove 141 after the welding truncated platform 14 is completed, refer to Figure 4 and Figure 5 , a movable plate 631 is slidably provided on the connecting guide rod 63, and a stamping protrusion 6311 for stamping and forming a docking groove 141 is fixed on one end of the movable plate 631 facing the stamping end block 62. A through hole for the stamping protrusion 6311 to pass through is provided on the stamping table, and the through hole and the stamping protrusion 6311 are adapted to each other. A state adjustment component 65 is provided on the sliding block 61, and the state adjustment component 65 is used to drive the movable plate 631 to slide, so as to drive the stamping protrusion 6311 to extend out of the through hole toward one end of the fixing clamp 5 or to retract into the through hole. In this embodiment, when the stamping protrusion 6311 is retracted into the through hole, the end of the stamping protrusion 6311 is flush with the surface of the stamping end block 62 on the side facing the fixing clamp 5, so that the stamping surface of the stamping end block 62 forms a smooth plane.

[0036] Reference Figure 4 and Figure 5In the process of the sliding block 61 driving the stamping end block 62 to perform multiple consecutive stampings on the end of the wire, during the first stampings, the state adjustment component 65 drives the stamping protruding rod 6311 to retract into the through hole, and the protruding rod will not interfere with the stamping and forming of the welding truncated platform 14, so that the welding truncated platform 14 can form a cylinder. During the last stamping, the state adjustment component 65 drives the stamping protruding rod 6311 to extend out of the through hole, and the stamping protruding rod 6311 stamps the welding truncated platform 14, thereby forming a docking groove 141 on the welding truncated platform 14.

[0037] In order to facilitate automatic adjustment of the state of the stamping convex rod 6311, refer to Figure 4 and Figure 5 , so that the stamping convex rod 6311 extends out of the through hole after the welding of the round table 14 is completed. The state adjustment component 65 includes a cam 651, a tension spring 652, and a rotating component. The cam 651 rotates on the side wall of the sliding block 61. The tension spring 652 is arranged between the sliding block 61 and the movable plate 631. One end of the tension spring 652 is fixedly connected to the sliding block 61, and the other end of the tension spring 652 is fixedly connected to the movable plate 631. The tension spring 652 drives the movable plate 631 to approach the sliding block 61, so as to drive the movable plate 631 to abut against the peripheral wall of the cam 651.

[0038] Reference Figure 4 and Figure 5 , the rotating component drives the cam 651 to rotate intermittently. Specifically, the rotating component includes a ratchet 6531, a locking pawl 6532, a deflection rod 6533, a toggle pawl 6534, a sliding round rod 6535, a first torsion spring 6536, and a second torsion spring 6537. The ratchet 6531 is coaxially fixed with the cam 651. The deflection rod 6533 is rotationally connected to the rotating shaft of the ratchet 6531, and the toggle pawl 6534 is rotationally connected to the top of the deflection rod 6533. The first torsion spring 6536 is arranged between the toggle pawl 6534 and the top of the deflection rod 6533, and the first torsion spring 6536 drives the toggle pawl 6534 to abut against the ratchet 6531. A sliding groove is provided on the side wall of the deflection rod 6533 along the length direction, and the sliding round rod 6535 is fixedly connected to the workbench 2 through a fixed block. The sliding round rod 6535 is movably arranged in the sliding groove and abuts against the inner wall of the sliding groove. The locking pawl 6532 is rotatably arranged on the side wall of the sliding block 61, and the second abutting torsion spring 6537 is arranged between the locking pawl 6532 and the sliding block 61, and the second abutting torsion spring 6537 drives the locking pawl 6532 to abut against the ratchet 6531.

[0039] Reference Figure 4 and Figure 5In the process of reciprocating movement of the sliding block 61, the sliding round rod 6535 fixed on the side wall of the workbench 2 slides in the sliding groove of the deflection rod 6533. When the sliding block 61 is away from the fixed clamp 5, the sliding round rod 6535 pushes one end of the deflection rod 6533 to make the deflection rod 6533 swing. At this time, the toggle pawl 6534 at the top of the deflection rod 6533 pushes the ratchet 6531 to rotate under the action of the first torsion spring 6536, thereby driving the cam 651 to rotate. When the sliding block 61 is close to the fixed clamp 5, the sliding round rod 6535 does not apply force to the deflection rod 6533. At this time, the locking pawl 6532 is against the ratchet 6531 under the action of the second torsion spring 6537, preventing the ratchet 6531 from rotating in the opposite direction, ensuring that the cam 651 maintains the current state. When the rotating protruding part of the cam 651 contacts the movable plate 631, the movable plate 631 is pushed away from the sliding block 61. When the non-protruding portion of the cam 651 contacts the movable plate 631 , the tension spring 652 pulls the movable plate 631 back to approach the sliding block 61 .

[0040] To facilitate automatic cutting of long wires, refer to Figure 4 and Figure 5 The cutting assembly 4 includes a bracket 41, a tilting rod 42, a broken knife 43, a deflection component 44, and a reset torsion spring 45. The bracket 41 is fixedly arranged on the workbench 2, the middle part of the tilting rod 42 is rotatably matched with the bracket 41, and the broken knife 43 is fixed below the end of the tilting rod 42. The reset torsion spring 45 is arranged between the tilting rod 42 and the bracket 41, and the reset torsion spring 45 drives the broken knife 43 away from the long wire. The deflection component 44 is used to drive the tilting rod 42 to overcome the elastic force of the reset torsion spring 45 and deflect, so that the broken knife 43 is close to the long wire. Specifically, the deflection component 44 includes a push rod 441, a rack, and an incomplete gear 443. The push rod 441 slides vertically on the sliding block 61. In this embodiment, a connecting frame is fixedly arranged on the side wall of the sliding block 61, and the push rod 441 slides vertically on the connecting frame. A roller 442 is arranged on the top of the push rod 441. The top of the push rod 441 of the stamping end block 62 abuts against the side wall of the tilting rod 42, and the rack is integrally formed on the side wall of the push rod 441. The incomplete gear 443 is coaxially fixed with the cam 651, and the incomplete gear 443 can mesh with the rack.

[0041] Reference Figure 4 and Figure 5When the cam 651 rotates, the incomplete gear 443 rotates with the cam 651. When the incomplete gear 443 and the rack are meshed with each other, the incomplete gear 443 drives the rack to move upward, so that the top rod 441 slides vertically upward on the connecting frame. The roller 442 on the top of the top rod 441 lifts the tilting rod 42, so that the tilting rod 42 overcomes the elastic force of the reset torsion spring 45 and deflects. The tilting rod 42 tilts and drives the broken knife 43 to approach the long wire and cut it off. After the cutting is completed, the incomplete gear 443 is disengaged from the rack. Under the action of the reset torsion spring 45, the tilting rod 42 is reset, and the broken knife 43 is away from the long wire, ready for the next cutting action. It is worth noting that when the top rod 441 is not moved up, the bottom surface of the tilting rod 42 is in a horizontal state, and the top rod 441 slides in the horizontal direction with the sliding block 61, and will not push the tilting rod 42. The broken knife 43 keeps a distance from the long wire.

[0042] The implementation principle of a cutting and punching device provided in the embodiment of the present application is as follows: the long wire on the wire coil 7 passes through the curved tube 82 of the decoiling mechanism. The power motor 83 drives the rotating frame 81 to rotate through the belt transmission, thereby driving the curved tube 82 to rotate, causing the long wire to shake quickly and eliminate the curling tendency of the long wire. At the same time, the electric clamp of the feeding mechanism 3 slides on the workbench 2 under the push of the electric push rod, and pulls the long wire from the decoiling mechanism to the position of the fixed clamp 5, and then the fixed clamp 5 clamps the long wire.

[0043] Then, the sliding member 64 drives the sliding block 61 to slide back and forth, and the sliding block 61 moves toward the fixing clamp 5 for many times, and the stamping end block 62 continuously impacts the fixed end of the long wire. During the reciprocating movement of the sliding block 61, the sliding round rod 6535 restrains the sliding groove of the deflection rod 6533, causing the lever to swing. When the sliding block 61 is away from the fixing clamp 5, the sliding round rod 6535 pushes the deflection rod 6533 to swing, causing the toggle pawl 6534 to push the ratchet 6531 to rotate, thereby driving the cam 651 to rotate. When the sliding block 61 is close to the fixing clamp 5, the sliding round rod 6535 does not apply force to the deflection rod 6533, and the locking pawl 6532 prevents the ratchet 6531 from rotating in the opposite direction, thereby maintaining the state of the cam 651. In the first few punchings, the non-protruding part of the cam 651 contacts the movable plate 631, and the tension spring 652 pulls the movable plate 631 back, so that the punching protrusion 6311 retracts into the through hole. At this time, the punching end block 62 punches the end of the wire to form a cylindrical welding truncated cone 14. When the last punching is performed, the protruding part of the cam 651 contacts the movable plate 631, pushing the movable plate 631 to make the punching protrusion 6311 extend out of the through hole, punching the welding truncated cone 14 to form a docking groove 141.

[0044] Furthermore, when the cam 651 rotates, the incomplete gear 443 rotates accordingly. When the incomplete gear 443 meshes with the rack on the push rod 441, the rack is driven to move upward, and the push rod 441 slides vertically upward on the connecting frame. The roller 442 on the top of the push rod 441 lifts the tilting rod 42, so that the tilting rod 42 overcomes the elastic force of the reset torsion spring 45 and deflects, driving the cutting knife 43 to approach the long wire and cut it. After the cutting is completed, the incomplete gear 443 is disengaged from the rack, and under the action of the reset torsion spring 45, the tilting rod 42 is reset, and the cutting knife 43 is away from the long wire, ready for the next cutting.

[0045] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stress-improved axial bypass photovoltaic diode, comprising two wires and a bypass diode chip (1), wherein the wires are divided into an anode lead (12) and a cathode lead (13), characterized in that: The ends of the anode lead (12) and the cathode lead (13) are integrally formed with a welding truncated cone (14), the diameter of the welding truncated cone (14) is larger than the diameter of the wire, a docking groove (141) is provided on the end surface of the welding truncated cone (14) facing away from the wire, and docking protrusions (11) are integrally formed on both end surfaces of the bypass diode chip (1), the docking protrusions (11) correspond to the docking grooves (141) one by one and are inserted into the docking grooves (141); the welding truncated cone (14) on the anode lead (12) is fixed to one end surface of the bypass diode chip (1) by soldering, and the welding truncated cone (14) on the cathode lead (13) is fixed to the other end surface of the bypass diode chip (1) by soldering.

2. A stress-improved axial bypass photovoltaic diode according to claim 1, characterized in that: It also comprises an injection-molded shell (15), wherein the welding truncated cone (14) of the anode lead (12) and the cathode lead (13) and the bypass diode chip (1) are all wrapped in the injection-molded shell (15).

3. The stress-improved axial bypass photovoltaic diode according to claim 1, characterized in that: The edge of the welding truncated cone (14) of the anode lead (12) is provided with a stress chamfer (142), and the stress chamfer (142) is provided on a side of the welding truncated cone (14) facing the bypass diode chip (1).

4. A processing technology for a stress-improved axial bypass photovoltaic diode, applied to the stress-improved axial bypass photovoltaic diode according to claim 1, characterized in that: The following steps are involved: S1. Cut the long wires on the wire coil material into short wires by cutting and punching equipment, and punch the ends of the wires; S2, fixing the welding truncated table (14) and the bypass diode chip (1) by soldering with tin wire; S3, forming an injection molded housing (15) by injection molding the welding truncated cone (14) of the anode lead (12) and the cathode lead (13) and the outside of the bypass diode chip (1).

5. A cutting and punching device, applied to the processing technology of the stress-improved axial bypass photovoltaic diode according to claim 4, characterized in that: The invention comprises a workbench (2), on which a feeding mechanism (3), a cutting assembly (4), a fixing clamp (5), and a punching mechanism (6) are arranged. The feeding mechanism (3) is used to pull a long wire to move and feed the long wire to the fixing clamp (5); the fixing clamp (5) is used to clamp the long wire, the cutting assembly (4) is used to cut the long wire, and the punching mechanism (6) is used to punch the end of the wire. The punching mechanism (6) comprises a sliding block (61), a punching end block (62), and a sliding member (64). The sliding block (61) is slidably matched with the workbench (2), the punching end block (62) is fixedly connected to one end of the sliding block (61) toward the fixing clamp (5), and the sliding member (64) is used to drive the sliding block (61) to slide in a direction close to or away from the fixing clamp (5).

6. A cutting and punching device according to claim 5, characterized in that: A connecting guide rod (63) is provided between the punching end block (62) and the sliding block (61); one end of the connecting guide rod (63) is fixedly connected to the punching end block (62), and the other end of the connecting guide rod (63) is fixedly connected to the sliding block (61); a movable plate (631) is slidably provided on the connecting guide rod (63); one end of the movable plate (631) facing the punching end block (62) is fixed with a connecting groove (14) for punching and forming. 1), the stamping platform is provided with a through hole for the stamping convex rod (6311) to pass through, the through hole and the stamping convex rod (6311) are adapted to each other, and the sliding block (61) is provided with a state adjustment component (65), the state adjustment component (65) is used to drive the movable plate (631) to slide, so as to drive the stamping convex rod (6311) to extend out of the through hole to one end facing the fixing clamp (5) or to retract into the through hole.

7. A cutting and punching device according to claim 6, characterized in that: The state adjustment component (65) comprises a cam (651), a tension spring (652), and a rotating component. The cam (651) rotates on the side wall of the sliding block (61); the tension spring (652) is arranged between the sliding block (61) and the movable plate (631); one end of the tension spring (652) is fixedly connected to the sliding block (61), and the other end of the tension spring (652) is fixedly connected to the movable plate (631); the tension spring (652) drives the movable plate (631) to approach the sliding block (61) so as to drive the movable plate (631) to abut against the peripheral wall of the cam (651); and the rotating component drives the cam (651) to rotate intermittently.

8. A cutting and punching device according to claim 7, characterized in that: The rotating component includes a ratchet (6531), a locking pawl (6532), a deflection rod (6533), a toggle pawl (6534), a sliding round rod (6535), a first torsion spring (6536), and a second torsion spring (6537); the ratchet (6531) is coaxially fixed to the cam (651), the deflection rod (6533) is rotationally connected to the ratchet (6531), the toggle pawl (6534) is rotationally connected to the top of the deflection rod (6533), the first torsion spring (6536) is arranged between the toggle pawl (6534) and the top of the deflection rod (6533), and the first torsion spring (6537) is arranged between the locking pawl (6534) and the top of the deflection rod (6533). The torsion spring (6536) drives the toggle pawl (6534) to abut against the ratchet (6531); the deflection rod (6533) is provided with a sliding groove along the length direction; the sliding round rod (6535) is fixedly connected to the workbench (2); the sliding round rod (6535) is movably arranged in the sliding groove and abuts against the inner wall of the sliding groove; the locking pawl (6532) is rotatably arranged on the side wall of the sliding block (61); the second abutting torsion spring (6537) is arranged between the locking pawl (6532) and the sliding block (61); the second abutting torsion spring (6537) drives the locking pawl (6532) to abut against the ratchet (6531).

9. A cutting and punching device according to claim 7, characterized in that: The cutting assembly (4) comprises a bracket (41), a tilting rod (42), a cutting knife (43), a deflection component (44), and a reset torsion spring (45); the bracket (41) is fixedly arranged on a workbench (2); the tilting rod (42) and the bracket (41) are rotatably matched; the cutting knife (43) is fixed at the end of the tilting rod (42); the reset torsion spring (45) is arranged between the tilting rod (42) and the bracket (41); the reset torsion spring (45) drives the cutting knife (43) away from the long wire; and the deflection component (44) is used to drive the tilting rod (42) to overcome the elastic force of the reset torsion spring (45) and deflect, so that the cutting knife (43) is close to the long wire.

10. A cutting and punching device according to claim 9, characterized in that: The deflection component (44) comprises a push rod (441), a rack, and an incomplete gear (443); the push rod (441) slides vertically on a sliding block (61); the top of the push rod (441) abuts against a side wall of a tilting rod (42); the rack is integrally formed on the side wall of the push rod (441); the incomplete gear (443) is coaxially fixed to a cam (651); and the incomplete gear (443) can mesh with the rack.

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