A soldering device for circular segmented photovoltaic solder tapes

Abstract

The present invention discloses a circular segmented photovoltaic solder strip and a soldering tin device, which includes at least one cycle of solder strip segments. A single cycle of solder strip segments includes a reflection segment and a back soldering segment. The reflection segment is joined to the front grid lines of the photovoltaic cell, and the back soldering segment is joined to the back of adjacent photovoltaic cells. The reflection segment has a circular strip structure, and a number of grooves parallel to the axial direction of the reflection segment are circumferentially arrayed on its side wall. The surfaces of the reflection segment and the back soldering segment are covered with a tin layer. For the circular photovoltaic solder strip provided by the present invention, the reflection segment is circular, and a number of grooves are circumferentially arrayed on its side wall, and the grooves are recessed. Due to light reflection, it is convenient to blow away the excess tin liquid along the grooves by an air knife after soldering tin. In addition, an arc surface is provided between adjacent grooves to further improve the light reflection. For the soldering tin device provided by the present invention, derailment detection mechanisms are arranged at the front and back to alarm and detect the derailment of the substrate, ensuring the soldering tin quality of the substrate.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic technology, and particularly relates to a tinning device for a circular segmented photovoltaic solder ribbon. Background Art

[0002] In recent years, the number of main grids of solar cells has become a hot topic. From the perspective of improving efficiency, cell manufacturers have increased the number of main grids from 3 to 4, 5, or even 6. From the perspective of reducing costs, module manufacturers have continuously reduced the amount of silver paste used on the cells, making the main grid lines thinner and increasing the number of main grid lines to more than a dozen or even dozens. These two technical routes for increasing the number of main grids are respectively called multi-main grid and non-main grid technologies. These two technologies lead to the same goal and have the advantages of high performance and low cost, and even more. The solder ribbons used in existing multi-main grid and non-main grid modules are mostly flat structures with large cross-sections, which block the main grids of the cells and cause a large loss of light, resulting in power loss. Summary of the Invention

[0003] Aiming at the defects existing in the above prior art, the main purpose of the present invention is to overcome the deficiencies of the prior art and disclose a circular segmented photovoltaic solder ribbon, which includes at least one cycle of solder ribbon segments. The solder ribbon segments of a single cycle include a reflection segment and a back soldering segment. The reflection segment is joined to the front grid line of the photovoltaic cell, and the back soldering segment is joined to the back of the adjacent photovoltaic cell. The reflection segment has a circular strip structure, and a plurality of grooves parallel to the axis of the reflection segment are arranged in a circumferential array on its side wall. The surfaces of the reflection segment and the back soldering segment are covered with a tin layer.

[0004] Further, the grooves are arc-shaped.

[0005] Further, there is an arc surface between adjacent grooves.

[0006] A tinning device for a circular segmented photovoltaic solder ribbon includes a tin bath, a liquid receiving pool, a circular air knife, a derailment detection mechanism, and a cooling fan. A first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel, a fifth guide wheel, and a sixth guide wheel are arranged in sequence from right to left. The first guide wheel, the second guide wheel, the third guide wheel, and the fourth guide wheel have an inverted trapezoidal structure. The fifth guide wheel and the sixth guide wheel are higher than the fourth guide wheel. The derailment detection mechanism is arranged at the inlet end and the outlet end respectively. The cooling fan is arranged above the fifth guide wheel and the sixth guide wheel. The circular air knife is arranged between the fourth guide wheel and the fifth guide wheel to blow the excess tin liquid off the waist surface and the bottom surface. The second guide wheel and the third guide wheel are immersed in the tin bath. A liquid receiving pool is arranged below the fourth guide wheel and the fifth guide wheel. The fourth guide wheel and the fifth guide wheel are connected to electrodes so that a short circuit is formed in the photovoltaic solder ribbon between the fourth guide wheel and the fifth guide wheel.

[0007] Further, arc-shaped guide grooves are concavely provided on the first guide wheel, the second guide wheel, the third guide wheel, the fourth guide wheel, the fifth guide wheel and the sixth guide wheel.

[0008] Further, the derailment detection mechanism includes a detection mechanism and a support mechanism. The detection mechanism includes a bracket, an adjustment cross beam, a swing arm, a tension spring, a spring, a pressure wheel, an adjustment bolt, an adjustment block, a slider and a proximity switch. The adjustment cross beam is horizontally arranged on the bracket. An adjustment slot is arranged along the length direction of the adjustment cross beam. A guide rail parallel to the adjustment slot is arranged on the upper surface of the adjustment cross beam. Pulleys are arranged on both sides of the slider, and an adjustment hole is arranged on the slider. The pulleys are arranged on the guide rail. The adjustment block is upwardly convexly provided with a locking block and an adjustment rod. The adjustment rod passes through the adjustment slot and is vertically slidably connected with the adjustment hole. The spring is sleeved on the adjustment rod and is respectively connected with the upper end of the adjustment rod and the slider. Locking grooves matched with the locking block are equidistantly arranged on the lower surface of the adjustment cross beam. A through screw hole is vertically arranged on the adjustment block. The adjustment bolt is matched with the screw hole. The swing arm is rotatably arranged at the lower end of the bracket. The pressure wheel is rotatably arranged at one end of the swing arm, and the other end is connected with the adjustment cross beam through a tension spring. The proximity switch is adjustably arranged on the adjustment block; an arc-shaped groove is arranged on the pressure wheel, and planes are arranged on both sides of the arc-shaped groove;

[0009] The support mechanism includes a support frame and a support wheel. The support frame is horizontally provided with a kidney-shaped hole. The support wheel is arranged on the support frame and is adjustably connected with the kidney-shaped hole. An arc-shaped groove is arranged on the support wheel;

[0010] The pressure wheel presses on the support wheel and is tangent to the horizontal plane.

[0011] Further, the included angle between the circular air knife and the axis of the photovoltaic solder tape is 10° - 30°.

[0012] Further, a first baffle and a second baffle are further included. The first baffle is arranged above the fourth guide wheel and forms an included angle of 30° - 60° with the horizontal plane. The second baffle is vertically arranged below the fourth guide wheel.

[0013] Beneficial effects achieved by the present invention:

[0014] For the circular photovoltaic solder tape provided by the present invention, the reflection section is circular. Meanwhile, a plurality of grooves are circumferentially arranged on the side wall thereof in an array, and the grooves are concavely arranged. Due to light reflection, it is convenient to blow away the redundant solder along the grooves through the air knife after soldering. In addition, an arc surface is arranged between adjacent grooves to further improve the light reflection.

[0015] The tinning device provided by the present invention is provided with derailment detection mechanisms at the front and rear to alarm and detect the derailment of the substrate, ensuring the tinning quality of the substrate. At the same time, a moving adjusting block is used to roughly adjust the upper limit position of the swing arm, and an adjusting bolt is used for fine adjustment to reduce the adjustment stroke of the adjusting bolt. By short-circuiting and generating heat on the substrate, it promotes the air knife to blow off the excess tin liquid on the surface of the substrate, ensuring the prominence of the surface shape of the circular photovoltaic solder tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a usage state diagram of a circular segmented photovoltaic solder tape of the present invention;

[0017] Figure 2 FIG. is a three-dimensional structural schematic diagram of a circular segmented photovoltaic solder tape of the present invention;

[0018] Figure 3 FIG. is a left view of a circular segmented photovoltaic solder tape of the present invention;

[0019] Figure 4 FIG. is a structural schematic diagram of a tinning furnace for a circular segmented photovoltaic solder tape of the present invention;

[0020] Figure 5 FIG. is a structural schematic diagram of the detection structure of the derailment detection mechanism;

[0021] Figure 6 FIG. is a structural schematic diagram of the adjusting crossbeam;

[0022] Figure 7 FIG. is a structural schematic diagram of the adjusting crossbeam from another perspective;

[0023] Figure 8 FIG. is a schematic diagram of the cooperation between the adjusting block and the swing arm;

[0024] Figure 9 FIG. is a schematic diagram of the cooperation between the pressure wheel and the support wheel;

[0025] The reference numerals are as follows:

[0026] 1. Reflection section, 2. Back soldering section, 9. Photovoltaic cell, 11. Groove, 12. Arc surface, 31. Tin bath, 32. Liquid receiving pool, 4. Circular air knife, 51. Bracket, 52. Adjusting crossbeam, 53. Swing arm, 54. Tension spring, 55. Spring, 56. Pressure wheel, 57. Adjusting bolt, 58. Adjusting block, 59. Slide block, 60. Proximity switch, 61. Support frame, 62. Support wheel, 71. First guide wheel, 72. Second guide wheel, 73. Third guide wheel, 74. Fourth guide wheel, 75. Fifth guide wheel, 76. Sixth guide wheel, 81. First baffle, 82. Second baffle, 521. Adjusting slot, 522. Guide rail, 523. Locking slot, 581. Locking block, 582. Adjusting rod, 591. Pulley, 611. Kidney-shaped hole. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] A circular segmented photovoltaic solder ribbon includes at least one cycle of solder ribbon segments. The solder ribbon segments of a single cycle include a reflective segment 1 and a back solder segment 2. The reflective segment 1 is joined to the front grid lines of a photovoltaic cell 9, and the back solder segment 2 is joined to the back of an adjacent photovoltaic cell 9. The reflective segment 1 has a circular strip structure, and a number of grooves 11 parallel to the axis of the reflective segment are arranged in a circumferential array on its side wall. The surfaces of the reflective segment 1 and the back solder segment 2 are covered with a tin layer.

[0029] In one embodiment, the groove 11 is arc-shaped.

[0030] In one embodiment, there is an arc surface 12 between adjacent grooves 11.

[0031] The production steps of the circular segmented photovoltaic solder ribbon of the present invention are as follows: First, the raw material is pulled through a mold to form a circular strip structure with grooves (substrate), then the substrate is segmented and pressed into a flat shape by a pressing wheel, then immersed in tin liquid to tin its surface, and finally air-dried and cured.

[0032] The present invention also provides a tinning device for the circular segmented photovoltaic solder ribbon, as Figures 4-9As shown in the figure, it includes a tin bath 31, a liquid receiving bath 32, a circular air knife 4, a derailment detection mechanism 5, and a cooling fan 6. The first guide wheel 71, the second guide wheel 72, the third guide wheel 73, the fourth guide wheel 74, the fifth guide wheel 75, and the sixth guide wheel 76 are arranged in sequence from right to left. The first guide wheel 71, the second guide wheel 72, the third guide wheel 73, and the fourth guide wheel 74 are in an inverted trapezoidal structure. The fifth guide wheel 75 and the sixth guide wheel 76 are higher than the fourth guide wheel 74, making the substrate in an inclined state and at the same time making the substrate closely attached to the fifth guide wheel 75. Among them, the fourth guide wheel 74 and the fifth guide wheel 75 are connected to electrodes. When the substrate passes around the fourth guide wheel 74 and the fifth guide wheel 75, a short circuit occurs, causing heat to be generated in this section of the substrate to prevent the tin layer from solidifying. The derailment detection mechanism 5 is separately arranged at the inlet end and the outlet end, that is, the direction of the substrate is detected before it enters the tin furnace, and the direction is detected again after the tin plating is completed to ensure that the substrate is in the accurate position during the candidate processing. The cooling fan 6 is arranged above the fifth guide wheel 75 and the sixth guide wheel 76 to cool and solidify the tin layer on the surface of the solder strip. The circular air knife 4 is arranged between the fourth guide wheel 74 and the fifth guide wheel 75, and the solder strip passes through the middle of the circular air knife 4; among them, the circular air knife 4 blows out air from the ring, blows out obliquely outward, and converges toward the middle; the excess substrate on the surface of the solder strip is blown away by the circular air knife 4. The second guide wheel 72 and the third guide wheel 73 are immersed in the tin bath 31, and a liquid receiving bath 32 is arranged below the fourth guide wheel 74 and the fifth guide wheel 75 to receive the excess tin liquid.

[0033] In the above embodiment, as Figures 4-9 shown, in order to further prevent the substrate from derailing in the direction during movement, thereby affecting the subsequent tinning of the substrate, arc-shaped guide grooves are provided on the first guide wheel 71, the second guide wheel 72, the third guide wheel 73, the fourth guide wheel 74, the fifth guide wheel 75, and the sixth guide wheel 76. Preferably, the arc-shaped guide groove is semi-circular.

[0034] In one embodiment, as Figures 4-9As shown, the derailment detection mechanism 5 includes a detection mechanism and a support mechanism. The detection mechanism includes a bracket 51, an adjustment cross beam 52, a swing arm 53, a tension spring 54, a spring 55, a pressure wheel 56, an adjustment bolt 57, an adjustment block 58, a slider 59, and a proximity switch 60. The adjustment cross beam 52 is horizontally arranged on the bracket 51. An adjustment slot 521 is arranged along the length direction of the adjustment cross beam 52, and a guide rail 522 parallel to the adjustment slot is arranged on the upper surface of the adjustment cross beam 52. Pulleys 591 are arranged on both sides of the slider 59, and an adjustment hole is arranged on the slider. The pulleys 591 are arranged on the guide rail 522, so that the rolling friction exists between the slider 59 and the adjustment cross beam 52, which is beneficial to the horizontal movement of the slider 59 on the adjustment cross beam 52. The adjustment block 58 is provided with a locking block 581 and an adjustment rod 582 protruding upward. The adjustment rod 582 passes through the adjustment slot 521 and is vertically slidably connected with the adjustment hole. The spring 55 is sleeved on the adjustment rod 582, and both ends of the spring 55 are respectively connected with the adjustment rod 582 and the slot 523. The adjustment block 58 is vertically provided with a through screw hole, and the adjustment bolt 57 is matched with the screw hole. The swing arm 53 is rotatably arranged at the lower end of the bracket 51, the pressure wheel 56 is rotatably arranged at one end of the swing arm 53, and the other end is connected with the adjustment cross beam 52 through the tension spring 54. Through the tension of the tension spring 54, the other end of the swing arm 53 is leaned against the adjustment cross beam 52; that is, the swing arm 53 rotates counterclockwise; at the same time, the adjustment bolt 57 is rotated to adjust the distance that its lower end protrudes from the lower surface of the adjustment block 58, and it is closely attached to the upper surface of the swing arm 53. The proximity switch 60 is adjustably arranged on the adjustment block 58 to limit the upper limit position of the counterclockwise rotation of the swing arm 53; an arc-shaped groove is arranged on the pressure wheel 56. Preferably, the radian angle of the arc-shaped groove is 150°-170°. Preferably, the radian angle of the arc-shaped groove is 150°-180°. The specific steps for adjusting the upper limit position of the swing arm 53 of the above structure are as follows: rotate the adjustment bolt 57 to make its lower end disappear into the adjustment block 58, and then press down the adjustment rod 582 to separate the locking block 581 of the adjustment block 58 from the locking groove 523, horizontally move the slider 59 to adjust to the target position, release the adjustment rod 582, and use the elastic force of the spring 55 to make the locking block 582 snap into the locking groove 523 to realize the fixation of the adjustment block 58. If this position happens to be the upper limit position of the swing arm 53, there is no need to continue adjusting the adjustment bolt 57, and if the upper limit position of the swing arm 53 is too high, rotate the adjustment bolt 57 to make its lower end protrude from the adjustment block 58.

[0035] In the above embodiment, as Figures 4-9 shown, two guide rails 522 are arranged and are respectively arranged on both sides of the adjustment slot 521.

[0036] In the above embodiment, as Figures 4-9 shown, at least two pulleys 591 are arranged at intervals on each of the opposite sides of the slider 59.

[0037] In the above embodiment, as Figures 4-9As shown, at least two adjusting rods 582 are provided, and the positions and number of the adjusting holes correspond to the adjusting rods 582. This prevents the locking block 581 of the adjusting block 58 from rotating at an angle after it is separated from the locking groove 523.

[0038] The support mechanism includes a support frame 61 and a support wheel 62. The support frame 61 is horizontally provided with a waist-shaped hole 611. The support wheel 62 is provided on the support frame 61 and is adjustably connected to the waist-shaped hole 611. The support wheel 62 is provided with an arc-shaped groove, which cooperates with the base. Preferably, the arc angle of the arc-shaped groove is 150°-170°.

[0039] The pressure wheel 56 is pressed on the support wheel 62 and is tangent to the horizontal plane. When the height of the substrate changes, the upper limit position of the swing arm 53 is changed by moving the adjustment block 58. Since the pressure wheel 56 changes its downward pressure position by rotating the swing arm 53, the horizontal position of the pressure wheel 56 also changes. The support wheel 62 with adjustable horizontal position is used to ensure that the pressure wheel 56 and the support wheel 62 are tangent to the horizontal plane at the same time. The specific method for the above structure to detect whether derailment occurs is that the substrate is placed in the arc groove of the pressure wheel 56 to prevent the substrate from derailing; when the substrate is separated from the arc groove, the substrate will lift the pressure wheel 56, and the proximity switch 60 cannot sense the swing arm 53 at this time, and the equipment will stop and alarm. To realize the alarm of substrate derailment. Among them, the pressure wheel 56 can be pressed on the substrate with a certain pressure, or it can be set at a distance from the substrate. In addition, since the welding strip is a circular section with one end flat, by setting the arc grooves on the pressure wheel 56 and the support wheel 62 between 150°-170°, the pressure wheel 56 and the support wheel 62 are always pressed on the substrate. Even if the substrate rotates, the pressure wheel 56 and the support wheel 62 still partially overlap with the substrate.

[0040] In one embodiment, if Figures 4-9 As shown, each side of the circular wind knife 4 forms an angle of 10°-30° with the waist surface or bottom surface of the base.

[0041] In one embodiment, if Figures 4-9 As shown, it also includes a first baffle 81 and a second baffle 82. The first baffle 81 is arranged above the fourth guide wheel 74 and forms an angle of 30°-60° with the horizontal plane, and the second baffle 82 is vertically arranged below the fourth guide wheel 74.

[0042] When the present invention is used, Figures 1-9As shown, according to the height of the substrate, the pressing position of the pressing wheel 56 is adjusted. When derailing occurs, the welding tape cannot fall into the arc-shaped groove, and the pressing wheel 56 is lifted to detect whether the substrate derails; the substrate is guided into the tin bath 31 through the first guide wheel 71, the second guide wheel 72 and the third guide wheel 73, and a tin layer is coated on its surface. Then, the substrate between them is short-circuited to generate heat through the fourth guide wheel 74 and the fifth guide wheel 75 to prevent the tin layer from curing prematurely. At the same time, the excess tin liquid on the surface of the substrate is blown off by the circular air knife 4, and part of the blown tin liquid is diverted into the tin bath 31 by the first baffle 81, and the other part falls into the liquid receiving pool 32; the second baffle 82 is used to prevent the centrifugal force of the fourth guide wheel 74 from causing the tin liquid to be thrown towards the front-end substrate when it rotates. Then, it enters between the fifth guide wheel 75 and the sixth guide wheel 76 and is cooled and cured by the cooling fan 6. Finally, it is again inspected for derailment by the derailment detection mechanism 5.

[0043] The above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention; any modification or equivalent replacement of the present invention without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A tinning device for a circular segmented photovoltaic solder ribbon, characterized in that, it includes a tin bath, a liquid receiving bath, a circular air knife, a derailment detection mechanism and a cooling fan. A first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel, a fifth guide wheel and a sixth guide wheel are arranged in sequence from right to left. The first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are in an inverted trapezoidal structure. The fifth guide wheel and the sixth guide wheel are higher than the fourth guide wheel. The derailment detection mechanism is separately arranged at the inlet end and the outlet end. The cooling fan is arranged above the fifth guide wheel and the sixth guide wheel. The circular air knife is arranged between the fourth guide wheel and the fifth guide wheel. The redundant tin liquid on the waist surface and the bottom surface is blown off by the circular air knife. The second guide wheel and the third guide wheel are immersed in the tin bath. A liquid receiving bath is arranged below the fourth guide wheel and the fifth guide wheel. The fourth guide wheel and the fifth guide wheel are connected with electrodes, so that the photovoltaic solder ribbon between the fourth guide wheel and the fifth guide wheel forms a short circuit; The derailment detection mechanism includes a detection mechanism and a support mechanism. The detection mechanism includes a bracket, an adjusting cross beam, a swing arm, a tension spring, a spring, a pressure wheel, an adjusting bolt, an adjusting block, a slider and a proximity switch. The adjusting cross beam is horizontally arranged on the bracket. An adjusting groove is arranged along the length direction of the adjusting cross beam. A guide rail parallel to the adjusting groove is arranged on the upper surface of the adjusting cross beam. Pulleys are arranged on both sides of the slider, and an adjusting hole is arranged on the slider. The pulleys are arranged on the guide rail. The adjusting block is upwardly convexly provided with a locking block and an adjusting rod. The adjusting rod passes through the adjusting groove and is vertically slidably connected with the adjusting hole. The spring is sleeved on the adjusting rod and is respectively connected with the upper end of the adjusting rod and the slider. Locking grooves matched with the locking block are equidistantly arranged on the lower surface of the adjusting cross beam. A through screw hole is vertically arranged on the adjusting block. The adjusting bolt is matched with the screw hole. The swing arm is rotatably arranged at the lower end of the bracket. The pressure wheel is rotatably arranged at one end of the swing arm, and the other end is connected with the adjusting cross beam through a tension spring. The proximity switch is adjustably arranged on the adjusting block; An arc-shaped groove is arranged on the pressure wheel, and planes are arranged on both sides of the arc-shaped groove; The support mechanism includes a support frame and a support wheel. The support frame is horizontally provided with a waist-shaped hole. The support wheel is arranged on the support frame and is adjustably connected with the waist-shaped hole. An arc-shaped groove is arranged on the support wheel; The pressure wheel presses on the support wheel and is tangent to the horizontal plane.

2. The tinning device for a circular segmented photovoltaic solder ribbon according to claim 1, characterized in that, arc-shaped guide grooves are recessed on the first guide wheel, the second guide wheel, the third guide wheel, the fourth guide wheel, the fifth guide wheel and the sixth guide wheel.

3. The tinning device for a circular segmented photovoltaic solder ribbon according to claim 1, characterized in that, the included angle between the circular air knife and the axis of the photovoltaic solder ribbon is 10° - 30°.

4. The tinning device for a circular segmented photovoltaic solder ribbon according to claim 1, characterized in that, It further includes a first baffle and a second baffle. The first baffle is arranged above the fourth guide wheel and forms an angle of 30°-60° with the horizontal plane, and the second baffle is vertically arranged below the fourth guide wheel.

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