A welding device for photovoltaic module production

Abstract

The utility model belongs to photovoltaic module production technical field discloses a kind of welding devices for photovoltaic module production, including photovoltaic body, further including the feeding assembly for supporting photovoltaic body continuous conveying, rack assembly for supporting fixed is provided in feeding assembly middle, rack assembly feed end is provided with the execution component for laser welding photovoltaic body;Execution component includes the adjusting mechanism for moving adjustment welding position, several laser welding heads are installed on adjusting mechanism, extension frame is provided in laser welding head feed side, preheating lamp is installed below extension frame.The utility model discloses a kind of welding devices for photovoltaic module production, preheating lamp is set in front of laser welding head, can carry out overall preheating to photovoltaic body, reduce the thermal stress generated due to material local sharp heating when welding, help to prevent battery piece hidden crack, and improve solder flowability, so that weld more full, firm, improve the mechanical strength and electrical performance of product.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic module production technology, and in particular relates to a welding device for photovoltaic module production. Background Technology

[0002] Welding is a crucial step in the manufacturing process of photovoltaic modules, directly affecting their electrical performance and long-term reliability. In the photovoltaic industry chain, welding technology is primarily used for interconnecting solar cells and installing junction boxes. Its core objective is to achieve low-resistance, high-strength connections while avoiding damage to heat-sensitive materials (such as solar cells and bypass diodes). As the photovoltaic industry moves towards higher efficiency and automation, innovation in welding technology has become a significant driving force for breakthroughs in module performance. Laser welding technology achieves material bonding by focusing a high-energy laser beam. The laser beam acts non-contactly on the contact point between the welding strip and the solar cell electrodes, instantly and locally melting the material before rapid cooling to form a metallurgical bond.

[0003] Comparing with Chinese Patent CN223368468U, a welding apparatus for photovoltaic modules is disclosed, including a processing table and a vacuum mechanism. The processing table has a placement surface, which is configured to sequentially stack photovoltaic modules and flexible films along a direction away from the placement surface. The flexible film covers the photovoltaic modules and its edges are attached to the placement surface. The photovoltaic modules include solar cells and welding strips. Each solar cell has a portion to be welded, and the welding strip is located between the flexible film and the portion to be welded. Multiple solar cells are placed at intervals, with gaps between adjacent solar cells. Each vacuum mechanism is configured to communicate with several gaps to create a negative pressure between the flexible film and the placement surface, causing localized deformation of the flexible film towards the placement surface to press against the welding strip. The welding strip deforms and contacts the portion to be welded. This welding apparatus can improve welding quality and reduce the probability of welding abnormalities at the edges of the solar cells.

[0004] However, the aforementioned patents cannot weld while the workpiece is moving, which reduces the speed of welding production. Furthermore, the lack of preheating makes it easy for the area around the weld to be damaged due to rapid temperature differences. Therefore, a new type of equipment needs to be designed. Utility Model Content

[0005] The purpose of this invention is to provide a welding device for photovoltaic module production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A welding apparatus for photovoltaic module production includes a photovoltaic body and a feeding assembly for continuously conveying the photovoltaic body. A frame assembly for support and fixation is disposed in the middle of the feeding assembly. An execution assembly for laser welding the photovoltaic body is disposed at the feed end of the frame assembly. The frame assembly includes a first support, with a baffle plate disposed at the top of the first support, dividing the first support into a welding zone and a cooling zone. A cooling mechanism for blowing air to lower the temperature is disposed in the cooling zone of the first support. The execution assembly includes an adjustment mechanism for moving and adjusting the welding position. A plurality of laser welding heads are mounted on the adjustment mechanism. An extension frame is disposed on the feed side of each laser welding head, and a preheating lamp is mounted below the extension frame. The feeding assembly includes a second support, with two conveying rollers symmetrically mounted on the second support. A conveyor belt is installed between the conveying rollers. A servo motor is disposed at one end of one of the conveying rollers, and a positioning mechanism for limiting the position of the photovoltaic body is disposed on the conveyor belt.

[0008] Furthermore: the adjustment mechanism includes two symmetrically arranged electric push rods, a lifting frame is installed between the telescopic ends of the base plates of the two electric push rods, a plurality of limiting slides are installed on the lifting frame, locking pins are installed on the limiting slides, and the laser welding head is fixedly installed on the bottom surface of the limiting slides.

[0009] Furthermore, the feed end of the laser welding head base plate is provided with a guide surface, which is arc-shaped.

[0010] Furthermore, the positioning mechanism includes two limiting edges symmetrically arranged on the side of the conveyor belt and a plurality of limiting blocks evenly distributed on the surface of the conveyor belt.

[0011] Furthermore: the two limiting blocks are symmetrically paired as a group, and the limiting blocks and the conveyor belt are riveted together.

[0012] Furthermore: the cooling mechanism includes an air intake slot installed on the top of the first bracket and a fixed seat installed on the inner top surface of the first bracket. A swing frame is rotatably installed at the bottom of the fixed seat. The swing frame and the fixed seat are pressed and fixed by adjusting bolts. An electric fan is installed in the middle of the swing frame.

[0013] Furthermore, the fixed base, the swing frame, and the electric fan are provided in three sets, evenly distributed along the width direction.

[0014] Compared with existing technologies, the beneficial effects are:

[0015] A preheating lamp is installed in front of the laser welding head to preheat the photovoltaic cell as a whole, reducing thermal stress caused by rapid local temperature increases during welding. This helps prevent microcracks in the cells, improves solder flow, and results in a fuller, stronger weld, enhancing the product's mechanical strength and electrical performance. The feeding assembly (conveyor belt, servo motor) enables continuous automatic conveying of the photovoltaic cell, integrating loading, welding, cooling, and unloading processes into a smooth production line. This breaks through the bottleneck of traditional intermittent operations and significantly increases production capacity per unit time. The limiting edges on the side of the conveyor belt and the surface limiting... The positioning mechanism, composed of positioning blocks, achieves precise positioning and clamping of the photovoltaic body during transmission, effectively preventing positional deviation during welding and laying a solid foundation for subsequent high-precision welding, ensuring the consistency of weld point positions. The adjustment mechanism (electric push rod, lifting frame, and limiting slide) in the execution component allows operators to flexibly adjust the lateral position and vertical height of the laser welding head, enabling the device to quickly adapt to the welding needs of photovoltaic bodies of different specifications, ensuring stable and reliable welding quality. A baffle plate clearly divides the working area into a welding zone and a cooling zone, achieving thermal management isolation. An adjustable-angle electric fan in the cooling zone provides directional and efficient forced air cooling to the high-temperature workpiece after welding, accelerating its cooling and shaping, protecting subsequent equipment and shortening the production cycle. The air inlet design ensures a stable supply of cooling airflow, forming an effective heat dissipation channel. The rational design and strong synergy bring significant benefits in improving product quality, increasing production efficiency, enhancing process stability, and improving equipment adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a welding device for photovoltaic module production according to the present invention;

[0017] Figure 2 This is a front perspective view of the frame assembly of a welding device for photovoltaic module production as described in this utility model;

[0018] Figure 3 This is a left-side axonometric view of the frame assembly of a welding device for photovoltaic module production according to the present invention;

[0019] Figure 4 This is a top-view axonometric view of the actuator of a welding device for photovoltaic module production according to the present invention;

[0020] Figure 5 This is a bottom-view axonometric drawing of the actuator of a welding device for photovoltaic module production according to the present invention;

[0021] Figure 6 This is a schematic diagram of the feeding component of a welding device for photovoltaic module production according to the present invention.

[0022] In the attached diagram, the following are the reference numerals: 1. Frame assembly; 2. Actuation assembly; 3. Feeding assembly; 4. Photovoltaic body; 101. First support; 102. Barrier plate; 103. Air inlet slot; 104. Fixed seat; 105. Swing frame; 106. Electric fan; 107. Adjusting bolt; 201. Lifting frame; 202. Electric push rod; 203. Extension frame; 204. Preheating lamp; 205. Laser welding head; 206. Limiting slide; 207. Locking pin; 208. Guide surface; 301. Second support; 302. Conveyor roller; 303. Servo motor; 304. Conveyor belt; 305. Limiting edge; 306. Limiting block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 A welding apparatus for photovoltaic module production includes a photovoltaic body 4 and a feeding component 3 for continuously conveying the photovoltaic body 4. A frame component 1 for supporting and fixing is provided in the middle of the feeding component 3. An execution component 2 for laser welding of the photovoltaic body 4 is provided at the feeding end of the frame component 1.

[0025] In this embodiment: the frame assembly 1 includes a first support 101, and a baffle plate 102 is provided at the top of the first support 101. The baffle plate 102 divides the first support 101 into a welding area and a cooling area. A cooling mechanism for blowing air to lower the temperature is provided in the cooling area of ​​the first support 101. The cooling mechanism includes an air inlet slot 103 installed at the top of the first support 101 and a fixed seat 104 installed on the top surface of the first support 101. A swing frame 105 is rotatably mounted at the bottom of the fixed seat 104. The swing frame 105 and the fixed seat 104 are connected to the fixed seat 101. The base 104 is pressed and fixed by adjusting bolts 107, and an electric fan 106 is installed in the middle of the swing frame 105. During adjustment, the swing frame 105 is rotated under the support of the fixed base 104, so that the electric fan 106 tilts and blows air towards the conveyor belt 304, and the adjusting bolts 107 are tightened to fix it. During welding, when the photovoltaic body 4 moves through the barrier plate 102 in the middle of the first bracket 101, the electric fan 106 pushes the airflow to tilt and blow towards the photovoltaic body 4 to lower it. The air inlet groove 103 ensures that the airflow flows into the first bracket 101 from the top.

[0026] In this embodiment: the execution component 2 includes an adjustment mechanism for moving and adjusting the welding position. A plurality of laser welding heads 205 are mounted on the adjustment mechanism. An extension frame 203 is provided on the feed side of each laser welding head 205, and a preheating lamp 204 is installed below the extension frame 203. The adjustment mechanism includes two symmetrically arranged electric push rods 202. A lifting frame 201 is installed between the telescopic ends of the base plates of the two electric push rods 202. A plurality of limiting slides 206 are mounted on the lifting frame 201, and locking pins 207 are installed on the limiting slides 206. The laser welding head 205 is fixedly installed on the bottom surface of the limiting slide 206. A guide is provided at the feed end of the base plate of the laser welding head 205. The guide surface 208 is arc-shaped. During adjustment, the limiting slide 206 is pushed along the lifting frame 201 according to the welding position of the photovoltaic body 4. The laser welding heads 205 are aligned with the welding position of the photovoltaic body 4, and the locking nails 207 are tightened to fix them. Then, the first bracket 101 supports the electric push rod 202 to extend and retract, pushing the lifting frame 201 to move up and down, adjusting the gap between the laser welding head 205 and the photovoltaic body 4 to ensure the welding quality. During welding, the outer extension frame 203 first supports the preheating lamp 204 to irradiate the photovoltaic body 4 for overall heating. Then, the photovoltaic body 4 passes through the laser welding head 205 under the guidance of the guide surface 208 for welding.

[0027] In this embodiment: the feeding assembly 3 includes a second bracket 301, on which two conveying rollers 302 are symmetrically mounted, and a conveyor belt 304 is installed between the conveying rollers 302. One end of one of the conveying rollers 302 is provided with a servo motor 303, and the conveyor belt 304 is provided with a positioning mechanism for limiting the position of the photovoltaic body 4. The positioning mechanism includes two limiting edges 305 symmetrically arranged on the side of the conveyor belt 304 and a plurality of limiting blocks 306 evenly distributed on the surface of the conveyor belt 304. The two limiting blocks 306 are symmetrically arranged as a group, and the limiting blocks 306 and the conveyor belt 304 are riveted together. During welding, the photovoltaic body 4 is placed on the conveyor belt 304, and the two sides of the photovoltaic body 4 are close to the limiting edges 305, and the end of the photovoltaic body 4 is close to the limiting blocks 306. The second bracket 301 supports the servo motor 303 to drive the conveying rollers 302 to rotate, and pushes the conveyor belt 304 to support the photovoltaic body 4 to move through the first bracket 101.

[0028] Working principle: During adjustment, first push the limiting slide 206 along the lifting frame 201 according to the welding position of the photovoltaic body 4, adjust the laser welding head 205 to align with the welding position of the photovoltaic body 4, and tighten the locking nail 207 to fix it. Then, the first bracket 101 supports the extension and retraction of the electric push rod 202, pushes the lifting frame 201 to move up and down, adjusts the gap between the laser welding head 205 and the photovoltaic body 4 to ensure the welding quality, and then rotates the swing frame 105 under the support of the fixed seat 104, so that the electric fan 106 tilts and blows air towards the conveyor belt 304, and tightens the adjusting bolt 107 to fix it.

[0029] During welding, the photovoltaic body 4 is placed on the conveyor belt 304, with both sides of the photovoltaic body 4 tightly against the limiting edge 305 and the end of the photovoltaic body 4 tightly against the limiting block 306. The second bracket 301 supports the servo motor 303 to drive the conveyor roller 302 to rotate, pushing the conveyor belt 304 to support the photovoltaic body 4 and move through the first bracket 101. The extension frame 203 first supports the preheating lamp 204 to irradiate the photovoltaic body 4 for overall heating. Then, the photovoltaic body 4 passes through the laser welding head 205 under the guidance of the guide surface 208 for welding. After the photovoltaic body 4 moves through the baffle plate 102 in the middle of the first bracket 101, the electric fan 106 pushes the airflow to tilt and blow towards the photovoltaic body 4 to lower it. The air inlet groove 103 ensures that the airflow flows into the first bracket 101 from the top.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soldering device for the production of photovoltaic modules, comprising a photovoltaic body (4), characterized in that: It also includes a feeding assembly (3) for continuously conveying the photovoltaic body (4), and a frame assembly (1) for supporting and fixing is provided in the middle of the feeding assembly (3). An execution assembly (2) for laser welding the photovoltaic body (4) is provided at the feeding end of the frame assembly (1). The frame assembly (1) includes a first support (101), and a baffle plate (102) is provided at the top inside the first support (101). The baffle plate (102) divides the inside of the first support (101) into a welding area and a cooling area. A cooling mechanism for blowing air to cool down is provided in the cooling area of ​​the first support (101). The execution component (2) includes an adjustment mechanism for moving and adjusting the welding position. A plurality of laser welding heads (205) are mounted on the adjustment mechanism. An extension frame (203) is provided on the feed side of the laser welding head (205). A preheating lamp (204) is installed under the extension frame (203). The feeding assembly (3) includes a second bracket (301), on which two conveying rollers (302) are symmetrically mounted. A conveyor belt (304) is installed between the conveying rollers (302). One end of one of the conveying rollers (302) is provided with a servo motor (303), and a positioning mechanism for limiting the position of the photovoltaic body (4) is provided on the conveyor belt (304).

2. The soldering apparatus for photovoltaic module production according to claim 1, characterized in that: The adjustment mechanism includes two symmetrically arranged electric push rods (202), and a lifting frame (201) is installed between the telescopic ends of the base plates of the two electric push rods (202). Several limiting slides (206) are installed on the lifting frame (201), and locking pins (207) are installed on the limiting slides (206). The laser welding head (205) is fixedly installed on the bottom surface of the limiting slides (206).

3. The welding apparatus for photovoltaic module production according to claim 2, characterized in that: The laser welding head (205) has a guide surface (208) at the bottom plate feed end, and the guide surface (208) is arc-shaped.

4. The welding apparatus for photovoltaic module production according to claim 1, characterized in that: The positioning mechanism includes two limiting edges (305) symmetrically arranged on the side of the conveyor belt (304) and a plurality of limiting blocks (306) evenly distributed on the surface of the conveyor belt (304).

5. The welding apparatus for photovoltaic module production according to claim 4, characterized in that: Two of the limiting blocks (306) are symmetrically paired and the limiting blocks (306) and the conveyor belt (304) are riveted together.

6. The welding apparatus for photovoltaic module production according to claim 1, characterized in that: The cooling mechanism includes an air inlet slot (103) installed on the top of the first bracket (101) and a fixed seat (104) installed on the inner top surface of the first bracket (101). A swing frame (105) is rotatably installed on the bottom of the fixed seat (104). The swing frame (105) and the fixed seat (104) are pressed and fixed by adjusting bolts (107). An electric fan (106) is installed in the middle of the swing frame (105).

7. A soldering apparatus for photovoltaic module production according to claim 6, characterized in that: The fixed base (104), the swing frame (105), and the electric fan (106) are provided in three sets, which are evenly distributed along the width direction.

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