A stacked grid battery welding equipment

Abstract

This utility model relates to the field of photovoltaic technology, specifically to a welding equipment for stacked-grid solar cells, including a cell conveying and positioning component, a tooling conveying and positioning component, a welding execution component, and a transfer component. The cell conveying and positioning component uses suction cups to load the cells and aligns them using a positioning structure. The tooling conveying and positioning component reverses the flow and aligns the welding tooling. The welding execution component includes a chain conveyor plate chain, an infrared welding lamp box with upper and lower dual-group heating units, and a cooling fan. The transfer component (robotic arm) synchronously transfers the cells and tooling to the plate chain, and the tooling is separately retrieved after welding. The equipment is compatible with single / double-sided solar cells, achieving automated welding, improving welding yield and efficiency, and reducing battery electrical performance loss.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically to a welding device for stacked grid cells. Background Technology

[0002] Traditional stacked grid welding machines use a cylindrical winding method, which requires pressing the solar cells into an arc shape and then winding them with welding strips to achieve welding. This not only requires extremely high winding precision, but also makes the welding process prone to failure due to deviations, and can also cause latent stress in the solar cells, affecting their lifespan. Although polygonal roller winding is used in conjunction with UV adhesive to pre-fix the conductive wires, and then laser cutting is performed before welding, existing welding equipment lacks integrated design for the characteristics of the solar cells. It cannot simultaneously adapt to the welding needs of single-sided and double-sided solar cells. Moreover, problems such as inaccurate conveying and positioning, uneven heating, and untimely cooling occur during the welding process, resulting in low welding yield and large loss of solar cell electrical performance, making it difficult to meet the high-efficiency and stable welding requirements for the mass production of stacked grid solar cells.

[0003] In view of this, in order to overcome the above-mentioned technical problems, this utility model designs and develops a stacked grid battery welding equipment, which solves the above-mentioned technical problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model proposes a welding equipment for stacked grid cells, which solves the problem that existing battery welding equipment cannot simultaneously adapt to the welding needs of single-sided and double-sided cells; it also solves the problem that the traditional cylindrical winding welding method has excessively high requirements for winding accuracy, which easily leads to welding failure and causes hidden stress in the battery cells, affecting their service life; at the same time, it solves the technical defects of existing welding equipment, which lack integrated design, have inaccurate conveying and positioning, uneven welding heating, and untimely cooling, resulting in low welding yield, large loss of battery electrical performance, and difficulty in meeting the technical requirements of efficient and stable welding for large-scale mass production of stacked grid cells.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a stacked grid battery welding equipment, including: a battery cell conveying and positioning component for conveying and positioning the battery cells to be welded, a tooling conveying and positioning component for conveying and positioning the welding tooling, and a welding execution component for welding the battery cells to the conductive wire. The battery cell conveying and positioning component and the tooling conveying and positioning component are respectively used to convey the battery cell and welding tooling to the preset work station and complete the alignment. The welding execution assembly includes: a conveying mechanism for carrying and conveying the battery cell and welding fixture, a heating mechanism for heating and welding the battery cell and conductive wire, and a cooling mechanism for cooling the welded battery cell; it also includes a transfer assembly for transferring the battery cell conveying and positioning assembly, the aligned battery cell and welding fixture on the fixture conveying and positioning assembly to the conveying mechanism of the welding execution assembly, and for transferring the welding fixture from the conveying mechanism back to the fixture conveying and positioning assembly after welding.

[0006] As a preferred technical solution of this utility model, the battery cell conveying and positioning component includes: a battery cell conveyor belt, a suction cup for placing the battery cell on the battery cell conveyor belt, and a positioning structure for aligning the battery cell is provided at a preset work station of the battery cell conveyor belt.

[0007] As a preferred technical solution of this utility model, the tooling conveying and positioning component includes: a tooling conveyor belt, wherein a positioning element for aligning the welding tooling is provided at a preset work position of the tooling conveyor belt, and the tooling conveyor belt and the battery cell conveyor belt convey materials in opposite directions.

[0008] As a preferred technical solution of this utility model, the conveying mechanism of the welding execution component is a chain conveyor plate chain. The chain conveyor plate chain is uniformly provided with grooves for light to pass through, and the surface of the chain conveyor plate chain is inlaid with a silicone layer for attaching the conductive wires of the battery cell.

[0009] As a preferred embodiment of this utility model, the heating mechanism is an infrared welding lamp box, which includes two sets of heating units symmetrically arranged vertically to achieve double-sided heating of the battery cells.

[0010] As a preferred embodiment of this utility model, the cooling mechanism is a cooling fan, which is located downstream of the heating mechanism along the conveying direction.

[0011] As a preferred technical solution of this utility model, the transfer component is: a robotic arm, which can simultaneously grasp the aligned battery cell and the welding fixture, and can also grasp the welding fixture after welding is completed. The welding fixture includes: a pressure plate, a guide post, a spring, a pressure frame, a retaining ring, and an electromagnet; The pressure plate is fixedly connected to the guide post on the side away from the battery cell, and the other end of the guide post passes through the pressure frame and is fixed by a retaining spring; the spring is provided on the guide post and is located between the pressure plate and the pressure frame; the pressure frame has holes for the guide post to be installed, and the middle part is hollow, with electromagnets symmetrically installed on both sides; the number of electromagnets is at least two. The spring force is less than the total attraction force of the electromagnets on both sides of the pressure frame.

[0012] As a preferred technical solution of this utility model, the battery cell conveying and positioning component can be adapted to feed single battery cells, or to feed multiple battery cells simultaneously according to production capacity requirements.

[0013] As a preferred embodiment of this utility model, the shape of the groove on the chain conveyor plate is adapted to the light irradiation range of the infrared welding light box.

[0014] As a preferred embodiment of this invention, the heating power of the two sets of heating units can be independently adjusted according to the welding requirements of the battery cells.

[0015] In summary, this utility model has the following beneficial effects: Firstly, the equipment can simultaneously meet the welding operations of single-sided and double-sided batteries. It achieves uniform heating on both sides through the symmetrical heating units on the upper and lower sides of the infrared welding lamp box, avoiding the loss of battery electrical performance caused by insufficient adaptability of traditional welding equipment, and ensuring that the efficiency of different types of batteries remains stable after welding.

[0016] Secondly, the battery cell conveying and positioning assembly is fixed and aligned with the positioning structure by suction cups, and the tooling conveying and positioning assembly is precisely positioned by positioning components, and synchronously transported with the robot arm to ensure the alignment accuracy of the battery cells and the welding tooling; the silicone layer on the surface of the chain conveyor plate is bonded with conductive wires, and the trough is adapted to the penetration of infrared light, so the heating is uniform and the conductive wires are tightly bonded, effectively reducing defects such as poor welding and misalignment, and greatly improving the welding yield.

[0017] Thirdly, the equipment integrates fully automated functions for battery cell feeding, tooling conveying, welding, cooling, and tooling recycling. The battery cell conveying and positioning components can switch between single-cell or multi-cell feeding modes according to production capacity requirements. The chain conveyor plate chain continuously conveys the battery cells without frequent manual intervention, significantly improving the production efficiency of battery welding and meeting the needs of large-scale mass production.

[0018] Fourth, after welding, the heat dissipation fan quickly cools down the cells to prevent high temperatures from continuously affecting the structure and electrical performance of the cells, and to reduce problems such as tin layer shift and battery performance degradation caused by untimely cooling. At the same time, the silicone layer of the chain conveyor can buffer the impact during the conveying process, protect the cells from damage, and reduce the cell loss rate during the production process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view provided by an embodiment of the present utility model; Figure 2 This is a schematic diagram of the chain plate welding conveyor line provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the internal structure of the infrared welding light box provided in this embodiment of the utility model; Figure 4 This is a perspective view of the positioning structure provided in an embodiment of the present utility model; Figure 5 This is a top view of the positioning structure provided in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the installation of the positioning structure provided in this embodiment of the utility model. Figure 7 This is a perspective view of the welding fixture provided in an embodiment of the present invention. Figure 8 This is a top view of the pressure frame provided in an embodiment of this utility model.

[0021] In the diagram: 1. Battery cell conveyor belt; 2. Tooling conveyor belt; 3. Positioning structure; 31. Roller; 32. Transmission belt; 33. Positioning plate; 34. Positioning column; 4. Chain conveyor plate; 5. Infrared welding light box; 6. Heating unit; 7. Cooling fan; 8. Welding fixture; 81. Pressure plate; 82. Guide column; 83. Spring; 84. Pressure frame; 85. Snap ring; 86. Electromagnet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figure 1-8 As shown, the battery cell conveying and positioning assembly includes: a battery cell conveyor belt, a suction cup for placing the battery cells on the battery cell conveyor belt, and a positioning structure for aligning the battery cells is provided at a preset station on the battery cell conveyor belt.

[0027] The tooling conveying and positioning assembly includes: a tooling conveyor belt, with positioning components for aligning welding tooling at preset workstations on the tooling conveyor belt, and the tooling conveyor belt and the battery cell conveyor belt conveying materials in opposite directions.

[0028] The conveying mechanism of the welding execution component is a chain conveyor plate chain. The chain conveyor plate chain has grooves evenly opened on it for light to pass through, and the surface of the chain conveyor plate chain is inlaid with a silicone layer for attaching the conductive wires of the battery cell.

[0029] The heating mechanism is an infrared welding lamp box, which includes two sets of heating units arranged symmetrically on the top and bottom to achieve double-sided heating of the battery cells.

[0030] The cooling mechanism is a cooling fan, which is located downstream of the heating mechanism along the conveying direction.

[0031] The transfer component is a robotic arm, which can simultaneously grasp the aligned battery cells and welding fixtures, and can also independently grasp the welding fixtures after welding is completed.

[0032] The welding fixture 8 includes: a pressure plate 81, a guide post 82, a spring 83, a pressure frame 84, a retaining ring 85, and an electromagnet 86. The side of the pressure plate 81 away from the battery cell is fixedly connected to the guide post 82, and the other end of the guide post 82 passes through the pressure frame 84 and is fixed by the retaining ring 85. The spring 83 is located on the guide post 82 and between the pressure plate 81 and the pressure frame 84. The pressure frame 84 has holes for installing the guide post 82, and the middle part is hollow. Electromagnets 86 are symmetrically installed on both sides, and the number of electromagnets 86 is at least two. The elastic force of the spring 83 is less than the total attraction force of the electromagnets 86 on both sides of the pressure frame 84.

[0033] The cell conveying and positioning assembly can be adapted for single-cell feeding or simultaneous feeding of multiple cells depending on production capacity requirements. The shape of the grooves on the chain conveyor plate is adapted to the light illumination range of the infrared welding lamp box. The heating power of the two heating units can be independently adjusted according to the welding requirements of the cells.

[0034] Example: First, the battery cell is placed on the battery cell conveyor belt 1 of the battery cell conveying and positioning assembly by a suction cup. After the battery cell conveyor belt 1 conveys the battery cell to the preset station, the positioning structure 3 at the station mechanically corrects the battery cell to ensure that its edge is aligned with the baseline. At the same time, the suction force of the suction cup is used to keep the battery cell stable.

[0035] The process of mechanically aligning the battery cell using the positioning structure 3 is as follows: two rollers 31 are placed at the preset workstation of the battery cell. After the battery cell is conveyed to the preset workstation, one of the rollers 31 is driven to rotate by a motor, which causes the transmission belt 32 to drive the positioning plate 33 and the positioning column 34 to move towards the battery cell conveyor belt 1. When the positioning column 34 moves to contact the battery cell, the positioning column 34 will push the battery cell to move into a rectangular arrangement, thus completing the mechanical alignment of the battery cell.

[0036] Meanwhile, the welding fixture 8 is conveyed by the fixture conveyor belt 2 of the fixture conveyor positioning component in the opposite direction to the battery cell conveyor belt 1. After reaching the corresponding preset station, the welding fixture 8 is accurately aligned by the positioning structure 3.

[0037] The process of positioning structure 3 aligning welding fixture 8 is as follows: two rollers 31 are arranged at the preset station of welding fixture 8. When welding fixture 8 is conveyed to the preset station, one of the rollers 31 is driven to rotate by a motor, so that the transmission belt 32 drives the positioning plate 33 and the positioning column 34 to move towards the fixture conveyor belt 2. When the positioning plate 33 moves to contact the welding fixture 8, the positioning plate 33 will push the welding fixture 8 to move into a rectangular arrangement, thus completing the mechanical alignment of welding fixture 8.

[0038] After the battery cell and welding fixture 8 have been aligned, the transfer component (multi-axis robot) is started. Its end effector first grabs the aligned battery cell and accurately places it on the chain conveyor plate 4 of the welding execution component; then it grabs the aligned welding fixture 8 and places the welding fixture 8 above the battery cell, so that the pressure plate 81 is directly opposite the conductive wire of the battery cell; at this time, the pressure plate 81 is located below the pressure frame 84, and the spring 83 is in its natural state due to the weight of the pressure plate 81.

[0039] Next, the pressing action is performed. Electromagnet 86 is energized, and the attraction force of electromagnets 86 on both sides of the pressing frame 84 on the chain conveyor plate causes the pressing frame 84 to move downward. Since the total attraction force of electromagnets 86 is greater than the elastic force of spring 83, the pressing frame 84 will compress the spring 83 on the guide post 82 during the downward movement. After being compressed, the spring 83 generates a reverse elastic force and transmits the pressure evenly to the pressing plate 81. As the spring 83 continues to compress, the pressing plate 81 gradually approaches the battery cell until the pressing plate 81 is completely in contact with the conductive wires on the battery cell. This ensures that the conductive wires of the battery cell are tightly bonded to the silicone layer embedded on the surface of the chain conveyor plate 4, achieving full compaction of all conductive wires and ensuring that each conductive wire can maintain close contact with the battery cell, preparing for subsequent welding.

[0040] The chain conveyor plate chain 4 drives the battery cells and tooling forward, first entering the working area of ​​the heating mechanism (infrared welding lamp box 5). Two sets of heating units 6, symmetrically arranged vertically inside the lamp box, are activated. Each heating unit 6 consists of multiple infrared lamps. After activation, the infrared light penetrates through grooves on the chain conveyor plate (the groove shape matches the light irradiation range) to the contact area between the battery cell and the conductive wire. The two sets of heating units 6 can independently adjust their power according to welding requirements, achieving uniform heating on both sides and completing the welding of the conductive wire and the battery cell.

[0041] After welding, the chain conveyor plate chain 4 transports the battery cell to the cooling mechanism (cooling fan 7). The airflow generated by the fan directly acts on the welding area, rapidly cooling it to the set temperature. After cooling, the chain conveyor transports the battery cell to the unloading position. The transfer component (robotic arm) switches to a separate gripping mode, removes the welding fixture 8 from the battery cell, and transfers it back to the conveyor belt of the fixture conveying and positioning component, realizing the recycling of the fixture. The welded battery cell is then sent to the next process via a subsequent conveying structure.

[0042] Throughout the process, the cell conveying and positioning component can switch to multi-cell feeding mode according to production capacity requirements, simultaneously conveying and positioning multiple cells, which are then synchronously transferred to the chain conveyor plate 4 by a robotic arm to achieve batch welding and improve production efficiency.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A welding device for stacked grid cells, characterized in that, include: A battery cell conveying and positioning assembly for conveying and positioning the battery cells to be welded, a tooling conveying and positioning assembly for conveying and positioning the welding tooling (8), and a welding execution assembly for welding the battery cells to the conductive wire. The battery cell conveying and positioning assembly and the tooling conveying and positioning assembly are respectively used to convey the battery cell and the welding tooling (8) to the preset work station and complete the alignment; The welding execution component includes: a conveying mechanism for carrying and conveying the battery cell and the welding fixture (8), a heating mechanism for heating and welding the battery cell and the conductive wire, and a cooling mechanism for cooling the welded battery cell; it also includes a transfer component for transferring the battery cell conveying and positioning component, the aligned battery cell and the welding fixture (8) on the fixture conveying and positioning component to the conveying mechanism of the welding execution component, and for transferring the welding fixture (8) from the conveying mechanism back to the fixture conveying and positioning component after welding.

2. A stacked grid cell welding apparatus as defined in claim 1, wherein: The battery cell conveying and positioning assembly includes: a battery cell conveyor belt (1), which uses a suction cup to place the battery cell on the battery cell conveyor belt (1), and the battery cell conveyor belt (1) is provided with a positioning structure (3) for aligning the battery cell at a preset work position. The tooling conveying and positioning assembly includes: a tooling conveyor belt (2), a positioning structure (3) for aligning the welding tooling (8) is provided at the preset work position of the tooling conveyor belt (2), and the tooling conveyor belt (2) and the battery cell conveyor belt (1) convey materials in opposite directions.

3. A stacked grid cell welding apparatus as defined in claim 1, wherein: The positioning structure (3) includes: two rollers (31), a transmission belt (32), a positioning plate (33), and a positioning post (34). The two rollers (31) are located on both sides of the battery cell conveyor belt (1), and one of them is driven by a motor. The two rollers (31) are connected by a transmission belt (32). The transmission belt (32) is arranged perpendicular to the battery cell conveyor belt (1) and a positioning plate (33) is installed on both sides. The two positioning plates (33) are parallel to each other. Multiple positioning posts (34) are installed on the upper surface of the positioning plate (33). The multiple positioning posts (34) are rectangular in shape.

4. A stacked grid cell welding apparatus as defined in claim 1, wherein: The conveying mechanism of the welding execution component is a chain conveyor plate chain (4). The chain conveyor plate chain (4) is evenly provided with grooves for light to pass through, and the surface of the chain conveyor plate chain (4) is inlaid with a silicone layer for attaching the conductive wires of the battery cell.

5. A stacked grid cell welding apparatus as defined in claim 1, wherein: The heating mechanism is an infrared welding lamp box (5), which includes two sets of heating units (6) arranged symmetrically on the top and bottom to achieve double-sided heating of the battery cells.

6. A stacked grid cell welding apparatus as defined in claim 1, wherein: The cooling mechanism is a cooling fan (7), which is located downstream of the heating mechanism along the conveying direction.

7. A stacked grid cell welding apparatus as defined in claim 1, wherein: The transfer component is a robotic arm, which can simultaneously grasp the aligned battery cell and the welding fixture (8), and can also grasp the welding fixture (8) after welding is completed. The welding fixture (8) includes: a pressure plate (81), a guide post (82), a spring (83), a pressure frame (84), a snap ring (85), and an electromagnet (86); The side of the pressure plate (81) away from the battery cell is fixedly connected to the guide post (82), and the other end of the guide post (82) passes through the pressure frame (84) and is fixed by a snap ring (85); the spring (83) is provided on the guide post (82) and is located between the pressure plate (81) and the pressure frame (84); the pressure frame (84) has holes for the guide post (82) to be installed, and the middle part is hollow, with electromagnets (86) symmetrically installed on both sides; the number of electromagnets (86) is at least two; The elastic force of the spring (83) is less than the total attraction force of the electromagnets (86) on both sides of the pressure frame (84).

8. A stacked grid cell welding apparatus as defined in claim 1, wherein: The battery cell conveying and positioning component can be adapted to feed single battery cells, or to feed multiple battery cells simultaneously according to production capacity requirements.

9. A stacked grid cell welding apparatus as defined in claim 4, wherein: The shape of the groove on the chain conveyor plate chain (4) is adapted to the light irradiation range of the infrared welding light box (5).

10. A stacked grid cell welding apparatus as defined in claim 5, wherein: The heating power of the two sets of heating units (6) can be independently adjusted according to the welding requirements of the battery cells.

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