Multi-grid photovoltaic cell manufacturing process and series welding equipment

Abstract

The invention relates to the technical field of series welding of multi-grid photovoltaic cells, in particular to a multi-grid photovoltaic cell manufacturing process and series welding equipment which comprises a base, a conveying belt and a stepping motor, one side of the base is in transmission connection with a transmission part, one side of the transmission part is provided with a drying part, one side of the drying part is provided with a removing part, and the removing part is provided with a cleaning part. The bottoms of the removing part and the drying part are in transmission connection with a lifting part. A telescopic rod is fixed to the bottom of the lifting part. After the electrode plate and the welding strip are conveyed to the bottom of the single-irradiation welding piece, the single-irradiation welding piece heats and welds the electrode plate and the welding strip, the reaction time of the cleaning agent and the residual soldering flux is guaranteed, the contact area and time of the residual soldering flux and the cleaning agent are increased, and therefore the time needed for eliminating the residual soldering flux is effectively shortened, and the welding efficiency is improved. And the cleaning effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-grid photovoltaic cell string welding, in particular to a multi-grid photovoltaic cell manufacturing process and string welding equipment. Background Art

[0002] Multi-grid photovoltaic cell string welding equipment is a core piece of equipment in photovoltaic module manufacturing. It's primarily used to efficiently connect solar cells with multiple busbars (e.g., 9, 12, or more), creating a series circuit through precision welding, thereby improving module power output and reliability. Its key functions include reducing resistive losses (by distributing the current collection path) and enhancing mechanical strength (by reducing the risk of hidden cracks). It also provides compatibility with high-efficiency cell technologies such as PERC, TOPCon, and HJT, and is particularly well-suited for the low-temperature welding requirements of fine grid lines (≤50μm) and ultra-thin silicon wafers (≤150μm). This equipment utilizes advanced technologies such as multi-axis vision positioning (accuracy ≤±0.1mm) and intelligent quality control (such as online EL testing) to support high-speed production (over 1200 cells / hour) and large-size cells (e.g., 210mm). It also significantly reduces costs by reducing silver paste usage and improving yield (≥99.5%). Current technology is evolving towards ultra-multi-grids (over 24 grids) and busbar-less modules, pushing module efficiency above 26%. It is a key piece of equipment in the photovoltaic industry's journey towards higher efficiency and larger sizes.

[0003] The electrode sheets (grid lines) of photovoltaic cells are usually made of silver paste (busbar) or silver aluminum paste (fine grid). The width of the grid lines ranges from 50μm (fine grid) to 1mm (busbar). The solder strips are mostly tin-coated copper strips (lead-containing / lead-free) and need to meet the requirements of low resistance (≤0.0175Ω·mm 2 / m) and high tensile strength (≥90MPa). The welding process can be selected according to the difference in battery technology, such as infrared welding (HJT battery, ≤200℃), hot air welding (PERC / TOPCon, 250~300℃) or laser welding (ultra-fine grid lines). The key parameters include temperature (matching slurry characteristics), pressure (0.5~2N / mm 2 ) and time (0.5-3 seconds), and detects cold solder joints or hidden cracks using EL imaging and infrared thermal imaging. Current trends focus on busbar-free (OBB) technology and low-temperature interconnect materials (such as conductive adhesives) to reduce silver consumption and adapt to HJT / perovskite cells. Simultaneously, AI real-time control and copper electroplating technologies are driving the industry towards high efficiency and low cost.

[0004] Existing multi-grid photovoltaic cell string welding equipment has obvious shortcomings. Usually, there is no relevant cleaning device for the conveyor belt, which can easily cause flux residue and dust and metal powder adsorption, which will contaminate the cell during transportation, thereby affecting the welding quality and performance of the cell. The current cleaning method is to shut down or take the conveyor belt offline, manually spray or apply the detergent on the surface of the conveyor belt, and then clean it with a brush or non-woven fabric. This method will not only cause the production process to be interrupted, increase debugging time and production costs, but also the long cleaning process will also reduce the overall production efficiency. At the same time, since the detergent reacts with the flux residue, it takes a long time, which can easily cause the detergent to drip, causing environmental pollution.

[0005] Therefore, there is a need for an online cleaning conveyor belt that can meet the long reaction time required for the cleaning agent to react with the flux residue without affecting the production efficiency of the multi-grid photovoltaic cell string welding equipment. Summary of the Invention

[0006] In order to solve the problem that the cleaning of the conveyor belt takes a long time and requires shutdown or taking the conveyor belt offline, which increases the debugging time and production costs, the present application provides a multi-grid photovoltaic cell manufacturing process and string welding equipment.

[0007] The technical solution of the present invention is: a multi-grid photovoltaic cell string welding device, including a base, a conveyor belt and a stepper motor, one side of the base is connected to a transmission member, one side of the transmission member is provided with a drying member, one side of the drying member is provided with a cleaning member, the cleaning member and the bottom of the drying member are connected to a lifting member, and a telescopic rod is fixed to the bottom of the lifting member; the lifting member is configured to maintain or disconnect the transmission connection between the drying member and the cleaning member and the transmission member by utilizing the telescopic force of the telescopic rod and cooperating with the lifting plate, so as to perform online cleaning of the conveyor belt when cleaning is required; the cleaning member is configured to be connected to the transmission member by using The conveyor belt is soaked in the cleaning agent, and the stepper motor drives the conveyor belt to move in the cleaning agent, thereby increasing the contact area and time between the flux residue and the cleaning agent, thereby shortening the time for processing the flux residue. At the same time, the drying part is used to remove the cleaning agent and compound residues, and then the segmented setting is used to soak and move again to increase the cleaning and decontamination effect; the drying part is configured to use the power transmitted by the transmission part to drive the cleaning brush on its top to move in the vertical direction through the transverse plate and the longitudinal plate to clean the compound and cleaning agent on the surface of the soaked conveyor belt, and then use non-woven fabric to dry it.

[0008] Furthermore, the stepper motor is fixedly installed on the bottom of the base through a connecting component, and the top of the base is rotatably connected to two main rollers through a connecting component. Teeth are fixed on the outer side of one end of the two main rollers close to the base, and one of the main rollers is connected to the output end of the stepper motor through a reducer. The conveyor belt is mounted on the outer side of the two main rollers, and the electrode sheet is placed on the top of the conveyor belt.

[0009] Furthermore, the transmission part is configured to make the drying part reciprocate by utilizing the power of the stepping motor to transport the electrode plate and cooperating with the triangular plate; the transmission part includes two rotating shafts, and the two rotating shafts are rotatably mounted on the inner sides of both ends of the base, and the other ends of the two rotating shafts are fixed with large gears, and the two large gears are respectively engaged with the teeth on the outer sides of the two main rollers, and the two triangular plates are respectively fixed to the middle parts of the two rotating shafts, and a limiting rod is fixed on the inner side of the base, and a link plate is slidably engaged on the outer side of the limiting rod, and one end of one triangular plate contacts the inner side of one end of the link plate, and the two ends of the other triangular plate contact the inner side of the other end of the link plate, and a clamping block is fixed at the bottom of each link plate.

[0010] Furthermore, an external assembly is fixed on the side of the base close to the main roller, and the external assembly is located on the side close to the two main rollers. The external assembly includes a top plate, a side plate and a bottom plate, one of the side plates is fixedly connected to the base, the two side plates are fixed to the bottom of the top plate, the bottom plate is fixed to the bottom of the two side plates, the telescopic rod is fixed to the bottom of the bottom plate, and an ash box is fixed on the inner side of the two side plates, and the ash box is located on one side of the bottom plate. Multiple groups of driven rollers are rotatably connected to the inner sides of the two side plates, and the two driven rollers form a group.

[0011] Furthermore, the lifting member includes a cylinder, which is fixed to the output end of the telescopic rod. A clamping plate is fixed to the outside of the cylinder. The top of the bottom plate is slidably clamped with a lifting plate through a connecting component, and a base is placed on the top of the lifting plate.

[0012] Furthermore, the cleaning piece includes a container box, which is slidably connected to the inner sides of the two side panels, and the bottom of the container box is fixedly connected to the top of the cylinder. The bottom of the container box is connected with a feed pipe and a discharge pipe, and the feed pipe and the discharge pipe are respectively located on both sides of the telescopic rod.

[0013] Furthermore, the drying part includes two movable plates, which are slidably connected to the inner sides of the two side plates, the inner sides of the two movable plates are rotatably connected with a lead screw, and the outer sides of the movable plates are connected to a transverse plate through threads, a spring is fixed inside one end of each movable plate, a square column is fixed to the other end of each spring, a longitudinal plate is fixed to the other ends of the two square columns, a wave-like groove is provided on the top of the transverse plate, a wave-shaped plate is fixed on the side of the longitudinal plate close to the transverse plate, and the wave-like groove and the wave-shaped plate are meshed, a cleaning brush is fixed on the top of the transverse plate and the longitudinal plate, the inner sides of the two movable plates are rotatably connected with a circular shaft, and the non-woven fabric is fixed to the outer side of the circular shaft.

[0014] Furthermore, the transmission part also includes a slide rail, which is fixedly connected to the other side of the movable plate close to the base. The outer side of the slide rail is slidably engaged with a tooth plate. A pinion is fixed to one end of the lead screw close to the base, and the pinion and the tooth plate are meshed. A hollow frame is fixed to the top of the tooth plate, and the hollow frame is located below the card block.

[0015] Furthermore, a welding strip pulling piece is fixedly connected to one side of the base, a feeding piece is fixed to one side of the welding strip pulling piece, a loading robot is fixed to the top of the feeding piece, a single-lens welding piece is fixedly connected to one side of the loading robot, and a flip assembly is fixed to the side of the loading robot away from the feeding piece.

[0016] Furthermore, the manufacturing process involved in the multi-grid photovoltaic cell string welding equipment includes the following steps:

[0017] S1, transport the electrode sheet to the bottom of the loading robot through the feeding piece, and then the loading robot places the electrode sheet on the top of the conveyor belt;

[0018] S2. The welding ribbon pulling part pulls out the welding ribbon to the specified length according to production requirements and cuts it, and transports half of it to the top of the electrode sheet. The stepper motor drives the electrode sheet to move the electrode sheet on one side toward the single-lens welding part;

[0019] S3, the loading robot places the last electrode sheet on the top of the other half of the welding strip, and loads the material back and forth in sequence;

[0020] S4. While loading, when the electrode sheet and the welding strip are transported to the bottom of the single-lens welding part, the single-lens welding part heats and welds the electrode sheet and the welding strip;

[0021] S5. When the surface of the conveyor belt needs to be cleaned, control the extension of the telescopic rod to clean the part of the conveyor belt located inside the outer assembly.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The multi-grid photovoltaic cell manufacturing process and string welding equipment described in the present invention, when the conveyor belt needs to be cleaned, the telescopic rod is used to control the movement of the container box so that the flux residue on the surface of the conveyor belt is immersed below the liquid level of the detergent. As the stepper motor drives the conveyor belt to move, the conveyor belt and the detergent move relative to each other, which not only ensures the reaction time between the detergent and the flux residue, but also increases the contact area and time of the flux residue and the detergent, thereby effectively shortening the time required to eliminate the flux residue and improving the cleaning effect. The conveyor belt will enter the inside of multiple cleaning parts and drying parts, and distribute the total reaction time of the flux residue and the detergent to each cleaning part, avoiding excessive reduction of the reaction speed by excessive compounds, so that large pieces of flux residue are gradually eliminated.

[0024] (2) On the basis of the beneficial effect (1), the conveyor belt drives the main roller to move, and the main roller makes the tooth plate move back and forth through a series of mechanical transmission structures, thereby driving the pinion to rotate forward and reverse, and the pinion drives the lead screw to rotate forward and reverse, and finally the transverse plate and the longitudinal plate drive the cleaning brush to clean the detergent and compound on the surface of the conveyor belt, and the circular shaft drives the non-woven fabric to wipe the liquid on the surface of the conveyor belt, thereby achieving the drying of the conveyor belt surface. The entire drying process is closely coordinated with the cleaning process, and no excessive human intervention is required, thereby realizing the automation of the cleaning process.

[0025] (3) The multi-grid photovoltaic cell manufacturing process and string welding equipment described in the present invention, when the conveyor belt needs to be cleaned, the telescopic rod is used to control the movement of the container box, so that the drying part and the cleaning part maintain a transmission connection with the transmission part or disconnect the transmission connection, and online cleaning is performed when necessary. At the same time, the cleaning link is sealed due to the external assembly, which prevents the detergent from dripping and polluting the environment. The staff can easily adjust the position of the container box and the drying part by controlling the extension and contraction of the telescopic rod according to the cleaning needs of the conveyor belt, ensuring that the conveyor belt can be effectively maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 2 A schematic cross-sectional view of the overall structure provided by the present invention;

[0029] Figure 3 for Figure 2 A magnified view of point A;

[0030] Figure 4 for Figure 2 Enlarged view of point E;

[0031] Figure 5 A schematic diagram of the lifting plate structure provided by the present invention;

[0032] Figure 6 The cross section of the base provided by the present invention is shown as follows Figure 1 ;

[0033] Figure 7 for Figure 6 Enlarged view of point C;

[0034] Figure 8 for Figure 6 Enlarged view of point D;

[0035] Figure 9 A schematic diagram of the structure of the container provided by the present invention;

[0036] Figure 10 A schematic diagram of the outer assembly structure provided by the present invention;

[0037] Figure 11 for Figure 10 Enlarged view of point B;

[0038] Figure 12 Schematic diagram of the drying element structure provided by the present invention Figure 1 ;

[0039] Figure 13 Schematic diagram of the drying element structure provided by the present invention Figure 2 ;

[0040] Figure 14 A schematic cross-sectional view of a drying element provided by the present invention;

[0041] Figure 15 The cross section of the base provided by the present invention is shown as follows Figure 2 ;

[0042] Figure 16 for Figure 6 Enlarged view of point F;

[0043] Figure 17 This is the overall schematic diagram of the string welding equipment.

[0044] In the figure: 1. Base; 2. Stepper motor; 3. Main roller; 4. Conveyor belt; 5. External assembly; 51. Top plate; 52. Side plate; 53. Bottom plate; 6. Electrode sheet; 7. Telescopic rod; 71. Cylinder; 72. Clamping plate; 73. Lifting plate; 74. Base; 8. Cleaning piece; 81. Container; 82. Discharge pipe; 83. Feed pipe; 9. Drying piece; 91. Movable plate; 92. Square column; 93. Lead screw; 94. Transverse plate; 95. Vertical plate ; 96. Cleaning brush; 97. Non-woven fabric; 98. Round shaft; 11. Ash suction box; 12. Driven roller; 13. Transmission part; 131. Rotating shaft; 132. Large gear; 133. Triangular plate; 134. Linking plate; 135. Limit rod; 136. Slide rail; 137. Tooth plate; 138. Small gear; 139. Hollow frame; 14. Welding strip pulling part; 15. Loading robot; 16. Feeding part; 17. Single-shot welding part; 18. Flipping assembly. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0046] Example: Figure 1-17 As shown, a multi-grid photovoltaic cell string welding device includes a base 1, a conveyor belt 4 and a stepper motor 2. A transmission member 13 is connected to one side of the base 1, a drying member 9 is provided on one side of the transmission member 13, and a cleaning member 8 is provided on one side of the drying member 9. The cleaning member 8 and the bottom of the drying member 9 are connected to a lifting member, and a telescopic rod 7 is fixed to the bottom of the lifting member; the lifting member is configured to maintain or disconnect the transmission connection between the drying member 9 and the cleaning member 8 and the transmission member 13 by utilizing the telescopic force of the telescopic rod 7, in cooperation with the lifting plate 73, The conveyor belt 4 is cleaned when needed; the cleaning part 8 is configured to soak the conveyor belt 4 with a cleaning agent, and cooperate with the stepper motor 2 to drive the conveyor belt 4 to move in the cleaning agent to increase the contact area and time between the flux residue and the cleaning agent, and at the same time cooperate with the drying part 9 to remove the cleaning agent and compound residues, and then use the segmented setting to soak and move again to increase the cleaning and decontamination effect; the drying part 9 is configured to drive the cleaning brush 96 on its top in the vertical direction through the transverse plate 94 and the longitudinal plate 95 by the power transmitted by the transmission part 13 The compound and detergent on the surface of the soaked conveyor belt 4 are cleaned by moving, and then dried with non-woven fabric 97. The stepper motor 2 is fixedly installed on the bottom of the base 1 through a connecting component. The top of the base 1 is rotatably connected to two main rollers 3 through a connecting component. The outer side of the two main rollers 3 close to the base 1 is fixed with teeth, and one of the main rollers 3 is connected to the output end of the stepper motor 2 through a speed reducer. The conveyor belt 4 is sleeved on the outer side of the two main rollers 3, and the electrode sheet 6 is placed on the top of the conveyor belt 4. The base 1 close to the main roller 3 is fixed with teeth. An outer assembly 5 is fixed on the side, and the outer assembly 5 is located on the side close to the two main rollers 3. The outer assembly 5 includes a top plate 51, a side plate 52 and a bottom plate 53, one of the side plates 52 is fixedly connected to the base 1, the two side plates 52 are fixed to the bottom of the top plate 51, the bottom plate 53 is fixed to the bottom of the two side plates 52, the telescopic rod 7 is fixed to the bottom of the bottom plate 53, and an ash box 11 is fixed on the inner side of the two side plates 52. The ash box 11 is located on one side of the bottom plate 53, and multiple groups of driven rollers 12 are rotatably connected to the inner side of the two side plates 52, and two driven rollers 12 form a group.

[0047] In this embodiment, before using this device, the staff needs to pass the cleaning agent through the hydraulic pump and the feed pipe 83, and inject it into the interior of the container box 81, align the liquid level with the bottom of the inclined surface of the container box 81, and then connect the discharge pipe 82 to the waste liquid recovery equipment through a pipeline. Finally, fix the vacuum cleaner to the interface at the bottom of the dust collection box 11 and start the vacuum cleaner. When the conveyor belt 4 moves to the top of the dust collection box 11, clean the metal debris and dust from the surface of the conveyor belt 4 for daily cleaning.

[0048] Specifically, the transmission member 13 is configured to make the drying member 9 reciprocate by utilizing the power of the stepping motor 2 to transport the electrode plate in conjunction with the triangular plate 133; the transmission member 13 includes two rotating shafts 131, and the two rotating shafts 131 are rotatably mounted on the inner sides of both ends of the base 1, and the other ends of the two rotating shafts 131 are fixed with large gears 132, and the two large gears 132 are respectively engaged with the teeth on the outer sides of the two main rollers 3, and the two triangular plates 133 are respectively fixed to the middle parts of the two rotating shafts 131, and a limiting rod 135 is fixed on the inner side of the base 1, and a link plate 134 is slidably engaged on the outer side of the limiting rod 135, and one end of one triangular plate 133 is in contact with the inner side of one end of the link plate 134, and the two ends of the other triangular plate 133 are in contact with the inner side of the link plate The inner side of the other end of the plate 134 is in contact, and a block is fixed to the bottom of each link plate 134. The transmission member 13 also includes a slide rail 136, which is fixedly connected to the other side of the movable plate 91 near the base 1. The outer side of the slide rail 136 is slidably clamped with a toothed plate 137. A pinion 138 is fixed to the end of the lead screw 93 near the base 1, and the pinion 138 is engaged with the toothed plate 137. A hollow frame 139 is fixed to the top of the toothed plate 137, and the hollow frame 139 is located below the block. The lifting member includes a cylinder 71, which is fixed to the output end of the telescopic rod 7. A locking plate 72 is fixed to the outer side of the cylinder 71. The top of the bottom plate 53 is slidably clamped with a lifting plate 73 through a connecting component, and a base 74 is placed on the top of the lifting plate 73.

[0049] When the conveyor belt 4 needs to be cleaned, the staff controls the extension of the telescopic rod 7 to move the container box 81 to the side close to the top plate 51 through the cylinder 71, so that the liquid surface is aligned with the side of the conveyor belt 4 that transports the electrode plate. At this time, the flux residue on the surface of the conveyor belt 4 is immersed below the liquid surface. At the same time, the cylinder 71 drives the clamping plate 72 to move to the side close to the top plate 51, and the clamping plate 72 drives the lifting plate 73 to move through its inclined surface. The lifting plate 73 pushes the base 74 to move to the side close to the top plate 51 through the arc at its top. The base 74 drives the drying member 9 to move to the side close to the top plate 51, and then moves the clamping plate into the inner side of the hollow frame 139, so that the transmission member 13 and the drying member 9 are connected in transmission. At this time, the heating and welding of the electrode plate and the welding strip by the single-shot welding member 17 is completed.

[0050] When the conveyor belt 4 is cleaned, when the single-lens welding part 17 heats and welds the electrode plate and the welding strip, the staff controls the telescopic rod 7 to retract, and the telescopic rod 7 drives the containing box 81 to return to its original position through the cylinder 71. At the same time, the cylinder 71 drives the triangular block on its top to move to the side close to the telescopic rod 7, and the triangular block drives the lifting plate 73 to move through its inclined surface. The arc at the top of the lifting plate 73 is misaligned with the arc at the bottom of the base 1. The base 74 moves to the side close to the telescopic rod 7 under the action of its own weight. The base 74 drives the drying part 9 to move to the side close to the telescopic rod 7, and then the card moves into the hollow frame 139 to separate, so that the transmission connection between the transmission part 13 and the drying part 9 is disconnected. At this time, the single-lens welding part 17 completes the heating and welding of the electrode plate and the welding strip, and the conveyor belt 4 is not in contact with the cleaning agent.

[0051] Specifically, the cleaning member 8 includes a container box 81, which is slidably connected to the inner sides of the two side plates 52, and the bottom of the container box 81 is fixedly connected to the top of the cylinder 71. The bottom of the container box 81 is connected with a feed pipe 83 and a discharge pipe 82, and the feed pipe 83 and the discharge pipe 82 are respectively located on both sides of the telescopic rod 7. The drying member 9 includes two movable plates 91, which are slidably connected to the inner sides of the two side plates 52. The inner sides of the two movable plates 91 are rotatably connected with a lead screw 93, and the outer sides of the movable plates 91 are connected by threads. It is connected to a transverse plate 94, and a spring is fixed inside one end of each movable plate 91. A square column 92 is fixed to the other end of each spring. A longitudinal plate 95 is fixed to the other end of the two square columns 92. A wave-like groove is provided on the top of the transverse plate 94, and a wave-like plate is fixed on the side of the longitudinal plate 95 close to the transverse plate 94, and the wave-like groove and the wave-like plate are engaged with each other. A cleaning brush 96 is fixed to the top of the transverse plate 94 and the longitudinal plate 95. The inner side of the two movable plates 91 is rotatably connected to a circular shaft 98, and the non-woven fabric 97 is fixed to the outer side of the circular shaft 98.

[0052] In this embodiment, multiple groups of cleaning members 8 and drying members 9 can be provided, and the number of the two groups is the same. The stepper motor 2 drives the conveyor belt 4 to move, and heats and welds the next electrode plate and welding strip. During welding, the cleaning agent and the flux residue react to gradually melt the flux. When the conveyor belt 4 moves, the conveyor belt 4 and the cleaning agent move relative to each other, and the flux residue and the cleaning agent compound on the surface of the conveyor belt 4 are washed away, and the flux residue that has not been in contact with the cleaning agent is exposed to the inside of the cleaning agent again. As the stepper motor 2 drives the conveyor belt 4 to move, the area and time of contact between the flux residue and the cleaning agent are increased while ensuring the reaction time between the cleaning agent and the flux residue, thereby shortening the time required to eliminate the flux residue and improving the cleaning effect.

[0053] When the conveyor belt 4 enters the drying element 9, the conveyor belt 4 drives the main roller 3 to move. The main roller 3 drives the large gear 132 to rotate through the teeth, and the large gear 132 drives the triangular plate 133 to rotate through the rotating shaft 131. When one of the triangular plates 133 starts to rotate, it gradually releases the transmission from the link plate 134. At the same time, the other triangular plate 133 drives the link plate 134 to move along the limit rod 135. Each time the main roller 3 drives the electrode sheet 6 to move one electrode sheet 6 width through the conveyor belt 4, the main roller 3 drives the two triangular plates 133 to rotate four times through the large gear 132, so that the link plate 134 performs two reciprocating motions along the outer side of the limit rod 135.

[0054] The link plate 134 drives the toothed plate to move back and forth along the outer side of the slide rail 136 through the block and the hollow frame 139. When the toothed plate moves back and forth, it drives the pinion 138 to do forward and reverse rotation. The pinion 138 drives the lead screw 93 to follow the pinion 138 to do forward and reverse rotation. The lead screw 93 rotates forward and reverse to drive the transverse plate 94 to move back and forth. At the same time, when the lead screw 93 rotates forward, the transverse plate 94 squeezes the wave-shaped plate through the wave-shaped groove to drive the longitudinal plate 95 to squeeze the square column 92. When the lead screw 93 rotates reversely, the transverse plate 94 releases the longitudinal plate 95 The block squeezes the longitudinal plate 95 under the action of the spring to restore the longitudinal plate 95 to its original position. During this process, the transverse plate 94 and the longitudinal plate 95 drive the cleaning brush 96 to clean the detergent and the residual compound of detergent and flux on the surface of the conveyor belt 4. When the conveyor belt 4 moves to the top of the circular shaft 98, the screw 93 drives the circular shaft 98 to follow the screw 93 to make a reciprocating motion through the belt and two pulleys, so that the circular shaft 98 drives the non-woven fabric 97 to wipe the liquid on the surface of the conveyor belt 4, making its surface dry and clean.

[0055] Then the conveyor belt 4 enters the next cleaning piece 8 and the inner side of the drying piece 9 to remove the compound residue and clean the surface of the conveyor belt 4. The movement of the conveyor belt 4 in the cleaning agent accelerates the reaction rate of the flux residue and the cleaning agent, shortening the time required to eliminate the flux residue. The alignment of multiple drying pieces 9 for cleaning avoids excessive reduction of the reaction rate due to the compound of the flux residue and the cleaning agent. The reaction time is then distributed to each cleaning piece 8, so that large pieces of flux residue are eliminated.

[0056] Specifically, a welding strip pulling piece 14 is fixedly connected to one side of the base 1, a feeding piece 16 is fixed to one side of the welding strip pulling piece 14, a loading robot 15 is fixed to the top of the feeding piece 16, a single-lens welding piece 17 is fixedly connected to one side of the loading robot 15, and a flip assembly 18 is fixed to the side of the loading robot 15 away from the feeding piece 16.

[0057] In this embodiment, the welding strip pulling piece 14 (which is the existing technology and will not be described in detail here) can pull the welding strip out to a specified length and then cut it according to production requirements. The loading robot 15 (which is the existing technology and will not be described in detail here) places the electrode sheet 6 on the top of the conveyor belt 4. The flipping component 18 (which is the existing technology and will not be described in detail here) can flip and detect the electrode sheet 6. The feeding piece 16 (which is the existing technology and will not be described in detail here) can load the loading robot 15.

[0058] Specifically, the manufacturing process involved in the multi-grid photovoltaic cell string welding equipment includes the following steps:

[0059] S1. The electrode sheet 6 is transported to the bottom of the loading robot 15 through the feeding piece 16, and then the loading robot 15 places the electrode sheet 6 on the top of the conveyor belt 4;

[0060] S2, the welding ribbon pulling member 14 pulls out the welding ribbon to the specified length according to production requirements and cuts it, and transports half of it to the top of the electrode sheet 6. The stepper motor 2 drives the electrode sheet 6 to move the position of one side of the electrode sheet 6 toward the single-lens welding part 17;

[0061] S3, the loading robot 15 places the last electrode sheet 6 on the top of the other half of the welding strip, and loads the material back and forth in sequence;

[0062] S4. While loading, when the electrode sheet 6 and the welding strip are transported to the bottom of the single-lens welding member 17, the single-lens welding member 17 heats and welds the electrode sheet 6 and the welding strip;

[0063] S5. When the surface of the conveyor belt 4 needs to be cleaned, the telescopic rod 7 is controlled to extend to clean the portion of the conveyor belt 4 located inside the outer assembly 5.

[0064] Working principle: Before using this device, the staff needs to pass the cleaning agent through the hydraulic pump and the feed pipe 83, and inject it into the inside of the holding box 81, align the liquid level with the bottom of the inclined surface of the holding box 81, and then connect the discharge pipe 82 to the waste liquid recovery equipment through the pipeline, and finally fix the vacuum cleaner to the interface at the bottom of the ash box 11, and start the vacuum cleaner. When the conveyor belt 4 moves to the top of the ash box 11, the metal debris and dust are cleaned from the surface of the conveyor belt 4 for daily cleaning. When the conveyor belt 4 needs to be cleaned, when the single-photo welding part 17 heats and welds the electrode plate and the welding strip, the staff controls the extension of the telescopic rod 7 to connect the transmission part 13 and the drying part 9 for transmission, and then the stepper motor 2 drives the conveyor belt 4 to move, and heats and welds the next electrode plate and welding strip. During welding, the cleaning agent and the flux residue react to gradually melt the flux. When the conveyor belt 4 moves, the conveyor belt 4 and the cleaning agent move relative to each other, and the conveyor belt 4. The flux residue and the compound of the detergent on the surface are washed away, and the flux residue that has not come into contact with the detergent is exposed to the inside of the detergent again. When the conveyor belt 4 enters the interior of the drying part 9, the conveyor belt 4 drives the main roller 3 to move, and the main roller 3 drives the large gear 132 to rotate through the teeth. The transverse plate 94 and the longitudinal plate 95 drive the cleaning brush 96 to clean the detergent and the detergent and flux residue compound on the surface of the conveyor belt 4. When the conveyor belt 4 moves to the top of the circular shaft 98, the circular shaft 98 drives the non-woven fabric 97 to wipe the liquid on the surface of the conveyor belt 4, and then the conveyor belt 4 enters the next cleaning part 8 and the inside of the drying part 9 to remove the compound residue and clean the surface of the conveyor belt 4. When the conveyor belt 4 is cleaned, when the electrode plate and the welding strip are heated and welded by the single-lens welding part 17, the staff controls the telescopic rod 7 to retract, so that the transmission connection between the transmission part 13 and the drying part 9 is disconnected. At this time, the conveyor belt 4 is not in contact with the detergent.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A multi-grid photovoltaic cell string welding device, comprising a base (1), a conveyor belt (4) and a stepper motor (2), characterized in that: A transmission member (13) is connected to one side of the base (1), a drying member (9) is provided on one side of the transmission member (13), a cleaning member (8) is provided on one side of the drying member (9), a lifting member is connected to the bottom of the cleaning member (8) and the drying member (9), and a telescopic rod (7) is fixed to the bottom of the lifting member; The lifting member is configured to utilize the telescopic force of the telescopic rod (7) to cooperate with the lifting plate (73) to maintain or disconnect the transmission connection between the drying member (9) and the cleaning member (8) and the transmission member (13), thereby performing online cleaning of the conveyor belt (4) when cleaning is required; The cleaning member (8) is configured to soak the conveyor belt (4) with a cleaning agent, cooperate with the stepping motor (2) to drive the conveyor belt (4) to move in the cleaning agent, thereby increasing the contact area and time between the flux residue and the cleaning agent, thereby shortening the time for processing the flux residue, and cooperate with the drying member (9) to remove the cleaning agent and compound residues, and then use the segmented setting to soak and move again, thereby increasing the cleaning and decontamination effect; The drying member (9) is configured to use the power transmitted by the transmission member (13) to drive the cleaning brush (96) on its top to move in a vertical direction through the transverse plate (94) and the longitudinal plate (95) to clean the compound and the detergent on the surface of the soaked conveyor belt (4), and then use the non-woven fabric (97) to dry it.

2. The multi-grid photovoltaic cell string welding equipment according to claim 1, characterized in that: The stepper motor (2) is fixedly mounted on the bottom of the base (1) via a connecting component. The top of the base (1) is rotatably connected to two main rollers (3) via a connecting component. The outer sides of the two main rollers (3) close to the base (1) are both fixed with teeth, and one of the main rollers (3) is transmission-connected to the output end of the stepper motor (2) via a speed reducer. The conveyor belt (4) is sleeved on the outer sides of the two main rollers (3), and the electrode sheet (6) is placed on the top of the conveyor belt (4).

3. The multi-grid photovoltaic cell string welding equipment according to claim 2, characterized in that: The transmission member (13) is configured to make the drying member (9) reciprocate by utilizing the power of the stepping motor (2) to transport the electrode plate and cooperating with the triangular plate (133); The transmission member (13) comprises two rotating shafts (131), the two rotating shafts (131) are rotatably mounted on the inner sides of both ends of the base (1), the other ends of the two rotating shafts (131) are fixed with large gears (132), the two large gears (132) are respectively engaged with the teeth on the outer sides of the two main rollers (3), two triangular plates (133) are respectively fixed to the middle parts of the two rotating shafts (131), a limiting rod (135) is fixed on the inner side of the base (1), and a link plate (134) is slidably engaged with the outer side of the limiting rod (135), one end of one triangular plate (133) contacts the inner side of one end of the link plate (134), and the two ends of the other triangular plate (133) contact the inner side of the other end of the link plate (134), and a clamping block is fixed to the bottom of each link plate (134).

4. The multi-grid photovoltaic cell string welding equipment according to claim 3, characterized in that: An outer assembly (5) is fixed on one side of the base (1) close to the main roller (3). The outer assembly (5) is located on a side close to the two main rollers (3). The outer assembly (5) comprises a top plate (51), a side plate (52) and a bottom plate (53). One side plate (52) is fixedly connected to the base (1). The two side plates (52) are fixed to the bottom of the top plate (51). The bottom plate (53) is fixed to the bottom of the two side plates (52). The telescopic rod (7) is fixed to the bottom of the bottom plate (53). An ash suction box (11) is fixed on the inner side of the two side plates (52). The ash suction box (11) is located on one side of the bottom plate (53). Multiple groups of driven rollers (12) are rotatably connected to the inner sides of the two side plates (52), and the two driven rollers (12) form a group.

5. The multi-grid photovoltaic cell string welding equipment according to claim 4, characterized in that: The lifting member comprises a cylinder (71), which is fixed to the output end of the telescopic rod (7), a clamping plate (72) is fixed to the outside of the cylinder (71), a lifting plate (73) is slidably clamped on the top of the bottom plate (53) through a connecting component, and a base (74) is placed on the top of the lifting plate (73).

6. The multi-grid photovoltaic cell string welding equipment according to claim 5, characterized in that: The cleaning member (8) comprises a container box (81), the container box (81) is slidably engaged with the inner sides of the two side plates (52), and the bottom of the container box (81) is fixedly connected to the top of the cylinder (71), and a feed pipe (83) and a discharge pipe (82) are connected through the bottom of the container box (81), and the feed pipe (83) and the discharge pipe (82) are respectively located on both sides of the telescopic rod (7).

7. The multi-grid photovoltaic cell string welding equipment according to claim 6, characterized in that: The drying member (9) comprises two movable plates (91), the two movable plates (91) are slidably connected to the inner sides of the two side plates (52), the inner sides of the two movable plates (91) are rotatably connected to a lead screw (93), the outer sides of the movable plates (91) are connected to a transverse plate (94) by threads, a spring is fixed inside one end of each movable plate (91), a square column (92) is fixed to the other end of each spring, a longitudinal plate (95) is fixed to the other end of the two square columns (92), a quasi-wave-shaped groove is provided on the top of the transverse plate (94), a wavy plate is fixed on the side of the longitudinal plate (95) close to the transverse plate (94), and the quasi-wave-shaped groove and the wavy plate are meshed, a cleaning brush (96) is fixed to the top of the transverse plate (94) and the longitudinal plate (95), the inner sides of the two movable plates (91) are rotatably connected to a circular shaft (98), and the non-woven fabric (97) is fixed to the outer side of the circular shaft (98).

8. The multi-grid photovoltaic cell string welding equipment according to claim 7, characterized in that: The transmission member (13) further includes a slide rail (136), which is fixedly connected to the other side of the movable plate (91) near the base (1), and a toothed plate (137) is slidably engaged on the outer side of the slide rail (136). A pinion (138) is fixed to one end of the lead screw (93) near the base (1), and the pinion (138) and the toothed plate (137) are engaged. A hollow frame (139) is fixed to the top of the toothed plate (137), and the hollow frame (139) is located below the clamping block.

9. The multi-grid photovoltaic cell string welding equipment according to claim 8, characterized in that: A welding strip pulling piece (14) is fixedly connected to one side of the base (1), a feeding piece (16) is fixed to one side of the welding strip pulling piece (14), a loading manipulator (15) is fixed to the top of the feeding piece (16), a single-lens welding piece (17) is fixed to one side of the loading manipulator (15), and a flip assembly (18) is fixed to the side of the loading manipulator (15) away from the feeding piece (16).

10. The manufacturing process of the multi-grid photovoltaic cell string welding equipment according to claim 9, characterized in that: The following steps are included S1, transporting the electrode sheet (6) to the bottom of the loading robot (15) through the feeding piece (16), and then the loading robot (15) places the electrode sheet (6) on the top of the conveyor belt (4); S2, the welding ribbon pulling member (14) pulls out the welding ribbon to a specified length according to production requirements and cuts it, and transports half of it to the top of the electrode sheet (6), and the stepping motor (2) drives the electrode sheet (6) to move the position of one side of the electrode sheet (6) toward the single-lens welding member (17); S3, the loading robot (15) places the last electrode sheet (6) on the top of the other half of the welding strip, and performs loading in sequence reciprocatingly; S4. While loading, after the electrode sheet (6) and the welding strip are transported to the bottom of the single-light welding member (17), the single-light welding member (17) heats and welds the electrode sheet (6) and the welding strip; S5. When the surface of the conveyor belt (4) needs to be cleaned, the telescopic rod (7) is controlled to extend to clean the portion of the conveyor belt (4) located inside the outer assembly (5).

Images