A kind of interdigital cell piece dense grid triangular conductive wire welding tooling
Patent Information
- Application Number
- CN202522369029.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-07
AI Technical Summary
[0005]为了弥补现有技术的不足，本实用新型提出了一种叠栅电池片密栅三角导电丝焊接工装，解决了现有叠栅电池焊接工艺中，因缺乏专用工装导致的导电丝与电池片压合不紧密、焊接质量差、助焊剂残留影响电性能等问题，提供一种结构合理、使用便捷的叠栅电池片密栅三角导电丝焊接工装，实现导电丝与叠栅电池片的均匀压合、高效焊接，保障电池产品质量
[0015]综上所述，本实用新型具有以下有益效果：本申请的电池焊接工装通过压框两侧磁钢提供吸附力，可压缩导柱上的弹簧并将压力平稳传输至压板，配合压板上的硅胶条能将一百多根导电丝全部压实，保证每根导电丝均能满焊，有效解决了叠栅电池焊接时导电丝与电池片接触压力不均的问题，降低焊接难度并提升焊接良率；同时，压框中间镂空及压板加工的条形镂空长孔，既便于红外光线（或红外LED灯）照射实现焊接，又利于焊接过程中助焊剂排出，减少助焊剂残留对电池电性能的影响，还方便焊接后吹气冷却，减少热量流失导致的虚焊、焊接不上等问题，最终保障电池效率稳定，为电池导电丝与电池片的高质量金属化焊接提供可靠支撑。
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Figure CN224896189U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, specifically to a welding fixture for densely packed triangular conductive wires of stacked grid solar cells. Background Technology
[0002] In the manufacturing of photovoltaic (PV) stacked-grid cells, the welding of conductive wires to the solar cells is one of the core processes, directly affecting the cell's power generation efficiency and reliability. Currently, most commonly used stacked-grid welding machines in the industry employ a cylindrical winding method. This method requires pressing the solar cells into an arc shape, and then applying welding tape to create pressure between the tape and the solar cells to complete the welding. This approach has significant drawbacks: firstly, it requires extremely high winding precision, as even minor winding deviations can lead to welding misalignment; secondly, the solar cells are forcibly pressed into an arc shape, which can easily cause latent stress damage, affecting the structural stability and lifespan of the solar cells.
[0003] To address these issues, the industry has gradually adopted a process using polygonal roller winding combined with UV adhesive. This involves first positioning the conductive wires using the polygonal roller winding, then pre-fixing the conductive wires to the battery cells with UV adhesive, and finally welding. However, this improved process still lacks dedicated welding fixtures, leading to problems such as loose contact during welding, unstable welding quality, and damage to electrical performance.
[0004] In view of this, in order to overcome the above-mentioned technical problems, this utility model designs and develops a welding fixture for densely packed triangular conductive wires of stacked grid solar cells, which solves the above-mentioned technical problems. Utility Model Content
[0005] To overcome the shortcomings of existing technologies, this utility model proposes a welding fixture for densely packed triangular conductive wires of stacked grid solar cells. This fixture solves the problems in existing stacked grid solar cell welding processes, such as poor bonding between the conductive wires and the solar cells, poor welding quality, and flux residue affecting electrical performance, caused by the lack of dedicated fixtures. It provides a reasonably structured and easy-to-use welding fixture for densely packed triangular conductive wires of stacked grid solar cells, achieving uniform bonding and efficient welding between the conductive wires and the stacked grid solar cells, thus ensuring the quality of battery products.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a welding fixture for densely packed triangular conductive wires of stacked grid solar cells, including: a pressure plate assembly for pressing solar cells, an elastic connection assembly for connection and buffering, and a frame assembly as the main body of the fixture. The side of the pressure plate assembly that contacts the battery cell is provided with a flexible contact structure, and the pressure plate assembly is provided with a hollow structure for welding operations and auxiliary functions. One end of the elastic connection component is connected to the pressure plate component, and the other end is connected to the frame component to realize the movable connection between the two and provide a buffering elastic force; The frame assembly is provided with an assembly structure for installing the elastic connection component, and the frame assembly is configured with an adsorption structure for providing tooling positioning or fixing force.
[0007] As a preferred technical solution of this utility model, the flexible contact structure is a flexible material component, and the coverage width of the flexible material component is greater than or equal to the distribution area width of the conductive wires on the battery cell.
[0008] As a preferred technical solution of this utility model, the hollow structure is a strip-shaped hollow elongated hole, which is arranged at intervals on the pressure plate assembly, and the width of the strip-shaped hollow elongated hole is greater than or equal to the width of the distribution area of the conductive wire on the battery cell.
[0009] As a preferred embodiment of the present invention, the elastic connection assembly includes: a guide post and a spring sleeve. One end of the guide post is connected to the pressure plate assembly, and the other end passes through the frame assembly and is fixed by a snap ring. The spring sleeve is mounted on the guide post and is located between the pressure plate assembly and the frame assembly.
[0010] As a preferred embodiment of this utility model, the frame component is a pressure frame, the middle part of the pressure frame is hollow, and the assembly structure is a hole opened on the pressure frame for the installation of the elastic connecting component.
[0011] As a preferred embodiment of this utility model, the adsorption structure is a magnet, and the number of magnets is at least two, which are symmetrically distributed on both sides of the frame assembly.
[0012] As a preferred embodiment of this utility model, the elastic force of the spring in the elastic connection assembly is less than the total adsorption force of the magnets on both sides of the frame assembly.
[0013] As a preferred technical solution of this utility model, the pressure plate assembly is a pressure plate, which is made of high-strength alloy material and coated with a high-temperature resistant insulating coating.
[0014] As a preferred technical solution of this utility model, the pressure plate is made of high-strength alloy material, namely aviation aluminum.
[0015] In summary, this utility model has the following beneficial effects: The battery welding fixture of this application provides adsorption force through the magnets on both sides of the pressure frame, which can compress the springs on the guide posts and smoothly transmit the pressure to the pressure plate. With the help of the silicone strip on the pressure plate, it can compact more than one hundred conductive wires, ensuring that each conductive wire can be fully welded. This effectively solves the problem of uneven contact pressure between the conductive wires and the battery cells during the welding of stacked grid batteries, reduces the welding difficulty and improves the welding yield. At the same time, the hollow center of the pressure frame and the strip-shaped hollow holes processed in the pressure plate facilitate the welding by infrared light (or infrared LED lamp) and the discharge of flux during the welding process, reducing the impact of flux residue on the battery's electrical performance. It also facilitates air cooling after welding, reducing problems such as incomplete welding and failure to weld caused by heat loss. Ultimately, it ensures stable battery efficiency and provides reliable support for high-quality metallization welding of battery conductive wires and battery cells. Attached Figure Description
[0016] 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.
[0017] Figure 1 This is a schematic diagram of the welding fixture and battery cell pressing provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the welding fixture fully pressing together the battery cells according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the pressure plate provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the silicone strip provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure frame provided in an embodiment of this utility model.
[0018] In the diagram: 1. Pressure plate; 2. Guide post; 3. Spring sleeve; 4. Pressure frame; 5. Silicone strip; 6. Strip-shaped hollowed-out long hole; 7. Snap ring; 8. Magnet; 9. Battery cell. Detailed Implementation
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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. The term "width" as used below refers to the direction of extension of the conductive wire, that is, with the direction of extension of the conductive wire as the length direction and the direction perpendicular to the direction of extension of the conductive wire as the width direction, and is unrelated to the shape of the device or structure itself. That is, the width of the structure may be longer than its length. For example, the "width of the hollow structure" mentioned below refers to the distance between two endpoints or end lines in the hollow structure in the direction perpendicular to the direction of extension of the conductive wire; the "coverage width of the flexible material part" refers to the distance between two end lines in the coverage area of the flexible material part in the direction perpendicular to the direction of extension of the conductive wire; and the "arrangement width of the conductive wires on the battery cell" refers to the distance between the two outermost conductive wires in the area of the conductive wire arrangement in the direction perpendicular to the direction of extension of the conductive wire. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] like Figure 1-5 As shown, it includes: a pressure plate assembly for pressing the solar cell 9, a flexible connection assembly for connection and buffering, and a frame assembly as the main body of the tooling. The pressure plate assembly has a flexible contact structure on the side that contacts the battery cell 9, and the pressure plate assembly has a hollow structure for welding operations and auxiliary functions; one end of the elastic connection assembly is connected to the pressure plate assembly and the other end is connected to the frame assembly to realize the movable connection between the two and provide a buffer elastic force; the frame assembly has an assembly structure for installing the elastic connection assembly, and the frame assembly is equipped with an adsorption structure for providing tooling positioning or fixing force.
[0024] The flexible contact structure is made of a flexible material, and the coverage width of the flexible material is greater than or equal to the width of the distribution area of the conductive wires on the battery cell 9. The flexible material can be a silicone strip or other materials. It can be a single piece or a single strip of silicone, or it can be multiple silicone strips spliced together in the horizontal or vertical direction, or multiple silicone strips interlaced to form the coverage surface of the flexible material. Preferably, as shown... Figure 3 As shown, the flexible material component is formed by splicing together a single silicone strip 5 along the extension direction of the conductive wires, covering the width of the distribution area of the conductive wires on the battery cell 9. The width of each silicone strip 5 is greater than or equal to the width of the distribution area of the conductive wires on the battery cell 9. Of course, in other cases, the silicone strips may have other forms. For example, the width of each silicone strip may not completely cover the width of the distribution area of the conductive wires, but multiple silicone strips are spliced laterally (i.e., perpendicular to the extension direction of the conductive wires) or staggered, so that the coverage width of the flexible material component is greater than or equal to the width of the distribution area of the conductive wires on the battery cell 9.
[0025] The hollow structure consists of elongated, strip-shaped holes 6, spaced apart on the pressure plate assembly. The opening direction of these holes 6 is the same as the arrangement direction of the conductive wires on the battery cell 9; that is, the long side of the hole 6 (defined as the width direction of the hole 6 as described above) is perpendicular to the extension direction of the conductive wires, and the same as the direction in which the conductive wires are laid parallel. The elastic connection assembly includes a guide post 2 and a spring sleeve 3. One end of the guide post 2 is connected to the pressure plate assembly, and the other end passes through the frame assembly and is fixed by a retaining spring 7. The spring sleeve 3 is located on the guide post 2, between the pressure plate assembly and the frame assembly. The frame assembly is a pressure frame 4, with a hollowed-out middle section. The assembly structure consists of holes on the pressure frame 4 for mounting the elastic connection assembly. The adsorption structure consists of magnets 8, with at least two magnets 8 symmetrically distributed on both sides of the frame assembly. The elastic force of the spring in the elastic connection assembly is less than the total adsorption force of the magnets 8 on both sides of the frame assembly.
[0026] The pressure plate assembly is pressure plate 1, which is made of high-strength alloy material, specifically aerospace-grade aluminum. The surface of pressure plate 1 is coated with a high-temperature resistant insulating coating. This coating helps to isolate the pressure plate 1 from high-temperature damage during the welding process, preventing deformation of pressure plate 1 due to long-term heating. It also prevents unnecessary electrical connections between pressure plate 1 and battery cells 9 and conductive wires, ensuring the safety of the welding operation and the service life of the pressure plate.
[0027] Implementation examples, in conjunction with the appendix Figure 1 (Schematic diagram of welding fixtures and cell pressing) Figure 2 (Schematic diagram of the welding fixture fully pressing the battery cells together) Figure 3 (Schematic diagram of pressure plate 1) Figure 4 (3D schematic diagram of welding fixture) and Figure 5 (Schematic diagram of pressure frame 4), the working principle of this battery welding fixture is as follows: First, perform the initial positioning of the tooling and battery cell 9, referring to... Figure 1 As shown in the diagram, the battery cell 9 is placed on a platform that can be attracted by a magnet or on a high-temperature resistant conveyor belt, ensuring that the area of the closely packed triangular conductive wires to be welded on the battery cell 9 is facing upwards and is in a flat position; then the entire welding fixture is placed above the battery cell 9, so that the pressure plate 1 (structure shown in the diagram) is positioned above the battery cell 9. Figure 3 The side of the device that contacts the battery cell 9 is inlaid with a silicone strip 5 and has a long, hollowed-out strip hole 6. The conductive wire is directly opposite the battery cell 9. The pressure frame 4 (see structure below) Figure 4 The hollowed-out part with magnets on both sides (8) is located above the pressure plate 1. At this time, the guide post 2 connects the pressure plate 1 and the pressure frame 4, and the spring sleeve 3 is located on the guide post 2 and is in a natural state.
[0028] Next, the tooling pressing action is initiated. Utilizing the attraction force of the magnets 8 on both sides of the pressing frame 4 to the adsorbable platform, the pressing frame 4 is moved downwards towards the platform. Since the total attraction force of the magnets 8 is greater than the spring force, the pressing frame 4 compresses the spring on the guide post 2 during its downward movement. The compressed spring generates a reverse elastic force, which is then evenly transmitted to the pressing plate 1. As the spring continues to compress, the pressing plate 1 gradually approaches the battery cell 9 until the silicone strip 5 embedded in it completely adheres to the densely packed triangular conductive wires on the battery cell 9, achieving full compaction of all conductive wires (see status). Figure 2 This ensures that each conductive wire maintains close contact with the battery cell 9, preparing for subsequent welding.
[0029] Finally, welding and subsequent processing are carried out. After the tooling is pressed together, infrared lamps or infrared LEDs are used to irradiate the contact area between the battery cell 9 and the conductive wire through the hollow area in the middle of the pressure frame 4 and the strip-shaped hollow holes 6 on the pressure plate 1. The heat of the infrared light is used to achieve metallization welding between the conductive wire and the battery cell 9. During the welding process, the strip-shaped hollow holes 6 can discharge the flux generated during welding in time, avoiding flux residue from affecting the battery's electrical performance. After welding is completed, infrared irradiation is stopped, and air is blown into the welding area through the strip-shaped hollow holes 6 to cool it. After the temperature drops to a safe range, the welding tooling is removed, completing the entire battery welding process.
[0030] 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 fixture for densely packed triangular conductive wires of stacked-grid solar cells, characterized in that, include: A pressure plate assembly for pressing solar cells (9), an elastic connection assembly for connection and buffering, and a frame assembly as the main body of the tooling. The side of the pressure plate assembly that contacts the battery cell (9) is provided with a flexible contact structure, and the pressure plate assembly is provided with a hollow structure for welding operation and auxiliary function realization. One end of the elastic connection component is connected to the pressure plate component, and the other end is connected to the frame component to realize the movable connection between the two and provide a buffering elastic force; The frame assembly is provided with an assembly structure for installing the elastic connection component, and the frame assembly is configured with an adsorption structure for providing tooling positioning or fixing force.
2. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The flexible contact structure is made of flexible material, and the coverage width of the flexible material is greater than or equal to the width of the distribution area of the conductive wires on the battery cell (9).
3. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The hollow structure is a strip-shaped hollow elongated hole (6), which is arranged at intervals on the pressure plate assembly, and the width of the strip-shaped hollow elongated hole (6) is greater than or equal to the width of the distribution area of the conductive wire on the battery cell (9).
4. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The elastic connection assembly includes a guide post (2) and a spring sleeve (3). One end of the guide post (2) is connected to the pressure plate assembly, and the other end passes through the frame assembly and is fixed by a snap ring (7). The spring sleeve (3) is provided on the guide post (2) and is located between the pressure plate assembly and the frame assembly.
5. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The frame component is a pressure frame (4), the middle part of the pressure frame (4) is hollow, and the assembly structure is a hole opened on the pressure frame (4) for the installation of the elastic connection component.
6. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The adsorption structure is a magnet (8), and the number of magnets (8) is at least two, and they are symmetrically distributed on both sides of the frame assembly.
7. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The elastic force of the spring in the elastic connection assembly is less than the total adsorption force of the magnets (8) on both sides of the frame assembly.
8. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 1, characterized in that: The pressure plate assembly is a pressure plate (1), which is made of high-strength alloy material and has a high-temperature resistant insulating coating on its surface.
9. The welding fixture for densely packed triangular conductive wires of stacked solar cells according to claim 8, characterized in that: The pressure plate (1) is made of high-strength alloy material, which is aerospace aluminum.