Welding tool and welding equipment

Abstract

The utility model relates to the technical field of photovoltaics, in particular to a welding tool and welding equipment. The welding tool is used for enabling a conductive wire to be welded to a plurality of battery piece substrates and comprises a positioning mechanism and a heating mechanism, the positioning mechanism comprises a rotating cylinder and a plurality of positioning pieces, the positioning pieces are sequentially arranged along the peripheral face of the rotating cylinder, the positioning pieces are configured to be used for containing the battery piece substrates and the conductive wire, and the heating mechanism is arranged on the rotating cylinder in the circumferential direction of the rotating cylinder. The two adjacent positioning pieces are at least partially overlapped, so that the two battery piece substrates placed on the positioning pieces are at least partially overlapped; the heating mechanism is arranged corresponding to the positioning piece to heat the positioning piece so that the conductive wire can be welded to the battery piece base body. Therefore, the alignment precision between the battery piece substrates is improved, the two adjacent battery piece substrates are at least partially overlapped, more battery piece substrates are arranged in a limited area, and the photoelectric conversion efficiency and the space area utilization rate of the photovoltaic module are improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a welding fixture and welding equipment. Background Technology

[0002] With the rapid development of the photovoltaic industry, higher requirements have been placed on the photoelectric conversion efficiency and cost control of photovoltaic modules. Negative-pitch photovoltaic modules refer to modules where the spacing between two adjacent cells in a cell string is less than zero, meaning there is overlap between the two cells.

[0003] Negative-pitch photovoltaic (PV) modules, as a highly efficient form of module packaging, allow for the stacking of adjacent cells with at least partial overlap. This enables the placement of more cells within a limited area, thereby improving the photoelectric conversion efficiency and space utilization of the PV module. However, in actual manufacturing processes, the partial overlap between cells makes it difficult to control the alignment precision, which can lead to a decrease in the photoelectric conversion efficiency and energy utilization of negative-pitch PV modules. Utility Model Content

[0004] This application discloses a welding fixture and welding equipment, which can improve the alignment accuracy between the solar cell substrate and the photoelectric conversion efficiency of the photovoltaic module.

[0005] To achieve the above objectives, this application discloses a welding fixture for welding conductive wires to multiple battery cell substrates. The welding fixture includes:

[0006] The positioning mechanism includes:

[0007] A rotating cylinder having an outer peripheral surface;

[0008] Multiple positioning elements are arranged sequentially along the outer circumferential surface of the rotating cylinder. The positioning elements are configured to place battery cell substrates and conductive wires. Along the circumferential direction of the rotating cylinder, adjacent positioning elements are at least partially overlapped, such that two battery cell substrates placed on the positioning elements at least partially overlap.

[0009] A heating mechanism is provided corresponding to the positioning member, and the heating mechanism is configured to heat the positioning member to weld the conductive wire to the battery cell substrate.

[0010] In some possible implementations, an overlapping area is formed between two adjacent positioning members in the circumferential direction of the rotating cylinder, and the width of the overlapping area in the circumferential direction of the rotating cylinder is 1mm-2mm.

[0011] In some possible implementations, the positioning member is provided with a plurality of conductive wire positioning grooves, which are spaced apart. Each conductive wire positioning groove passes through the positioning member along the circumferential direction of the rotating cylinder. In two adjacent positioning members, the conductive wire positioning groove on one positioning member corresponds to the conductive wire positioning groove on the other positioning member. The conductive wire positioning groove is used for the conductive wire to pass through.

[0012] In some possible implementations, the plurality of conductive wire positioning grooves include a plurality of first sub-grooves and a plurality of second sub-grooves, the plurality of first sub-grooves and the plurality of second sub-grooves are alternately spaced along the axial direction of the rotating cylinder, and the first sub-grooves on one positioning member correspond to the second sub-grooves on an adjacent positioning member;

[0013] Wherein, one end of the first sub-groove along the circumferential direction is configured to penetrate the positioning member along the thickness direction of the positioning member, so that the conductive wire is continuous on the first sub-groove on one positioning member and on the second sub-groove on the adjacent positioning member, so as to connect the two adjacent battery cell substrates.

[0014] In some possible implementations, the positioning element is provided with a placement groove configured to place the battery cell substrate, the placement groove having a bottom surface, and the conductive wire positioning groove being disposed on the bottom surface of the groove.

[0015] In some possible implementations, two adjacent positioning elements are respectively a first positioning element and a second positioning element, and along the thickness direction of the first positioning element, the first positioning element is located above the second positioning element;

[0016] The second positioning member has a plurality of guide posts on one side edge near the first positioning member. The plurality of guide posts are configured to be located on both sides of the conductive wire positioning groove along the axial direction of the rotating cylinder to guide the conductive wire into the conductive wire positioning groove.

[0017] In some possible implementations, the outer circumferential surface of the rotating cylinder includes a plurality of oblique cut surfaces connected sequentially along the circumferential direction of the rotating cylinder, and each oblique cut surface is used to set a positioning element.

[0018] In some possible implementations, the positioning member is provided with a plurality of adjustment holes on both sides of the rotating cylinder along the axial direction. The adjustment holes have a preset length along the circumferential direction of the rotating cylinder. The adjustment holes are connected to the rotating cylinder through a connector to adjust the installation position of the positioning member in the circumferential direction of the rotating cylinder.

[0019] In some possible implementations, the welding fixture further includes a preheating element disposed within the rotating cylinder and corresponding to the position of the positioning element, the preheating element being configured to preheat the positioning element.

[0020] In some possible implementations, the rotating cylinder is provided with a plurality of first through holes, and the positioning member is provided with a plurality of second through holes. The first through holes and the second through holes are connected to each other. The first through holes are configured to connect to an adsorption mechanism to adsorb the battery cell substrate.

[0021] Secondly, this application also discloses a welding device, including the welding fixture and frame as described in the first aspect above, wherein the welding fixture is disposed on the frame.

[0022] In some possible implementations, the welding equipment further includes:

[0023] A first feeding mechanism, comprising a lifting unit and a carrying unit, wherein the lifting unit is disposed on the frame, and the carrying unit is disposed on the lifting unit, and the carrying unit is configured to hold the battery cell substrate; and

[0024] The second feeding mechanism includes a moving unit and a picking unit. The moving unit is movably connected to the frame, and the picking unit is disposed on the moving unit. The moving unit can move relative to the frame in a direction close to or away from the carrier unit. The picking unit is configured to pick up the battery cell substrate on the carrier unit and place it on the positioning member.

[0025] In some possible implementations, the heating mechanism is rotatably mounted on the frame, and the heating mechanism can rotate relative to the frame to adjust the position of the heating mechanism corresponding to the positioning element.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] This application provides a welding fixture and welding equipment. The welding fixture is used to weld conductive wires to multiple solar cell substrates. The welding fixture has multiple positioning elements on the outer circumferential surface of a rotating cylinder, with adjacent positioning elements at least partially overlapping along the circumferential direction of the rotating cylinder. This allows two solar cell substrates placed on the positioning elements to also at least partially overlap. Simultaneously, the positioning elements can also be used to position the conductive wires. When a heating mechanism is positioned corresponding to the positioning elements, it can heat the positioning elements to weld the conductive wires to the solar cell substrates. Therefore, using the welding fixture of this application not only improves the alignment accuracy between the two solar cell substrates by utilizing the positioning elements, but also allows adjacent solar cell substrates to at least partially overlap by utilizing the overlapping of the positioning elements in the circumferential direction of the rotating cylinder. This enables the arrangement of more solar cell substrates within a limited area, thereby improving the photoelectric conversion efficiency and space utilization of photovoltaic modules. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the welding equipment disclosed in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the first feeding mechanism disclosed in the embodiments of this application;

[0031] Figure 3A This is a schematic diagram of the structure of the second feeding mechanism and the frame disclosed in the embodiments of this application;

[0032] Figure 3B This is an exploded view of the welding fixture (heating mechanism omitted) disclosed in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the welding fixture (excluding the heating mechanism) disclosed in an embodiment of this application from one perspective.

[0034] Figure 5 This is a front view of the welding fixture (heating mechanism omitted) disclosed in the embodiments of this application;

[0035] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0036] Figure 7This is a schematic diagram of the welding fixture (excluding the heating mechanism) disclosed in an embodiment of this application from another perspective;

[0037] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0038] Figure 9 This is a schematic diagram of the positioning component disclosed in the embodiments of this application;

[0039] Figure 10 This is a front view of the positioning element disclosed in the embodiments of this application;

[0040] Figure 11 This is a schematic diagram of the structure of the rotating cylinder disclosed in the embodiments of this application;

[0041] Figure 12 This is a front view of the rotating cylinder disclosed in the embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100 - Welding fixture; 1 - Positioning mechanism;

[0044] 11-Rotating cylinder; 111-Outer circumferential surface; 1111-Beveled surface; 112-First through hole;

[0045] 12-Positioning component; 121-Conductive wire positioning groove; 1211-First sub-groove; 1212-Second sub-groove; 122-Placement groove; 1221-Groove bottom surface; 123-First positioning component; 124-Second positioning component; 125-Adjustment hole; 126-Second through hole; 127-Guide post;

[0046] 13-Preheating component;

[0047] 2- Heating mechanism;

[0048] 200 - Welding equipment; 202 - Frame; 2021 - Frame; 2022 - Platform;

[0049] 203-First feeding mechanism; 2031-Lifting unit; 2032-Bearing unit; 2032a-Limiting block; 2032b-Bearing plate;

[0050] 204-Second feeding mechanism; 2041-Moving unit; 2041a-Driving component; 2041b-Guiding structure; 2042-Pick-up unit; 2042a-Bearing block; 2042b-Suction cup;

[0051] 300 - Conductive wire; 400 - Cell substrate;

[0052] F1 - Circumferential direction; F2 - Axial direction; F3 - Height direction; F4 - Width direction; F5 - Length direction. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In this application, the terms "upper," "lower," "bottom," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0055] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0056] Furthermore, the terms "installation," "setup," "equipped with," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0057] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0058] With the booming rise and rapid development of the photovoltaic industry worldwide, the industry has placed increasingly stringent and urgent demands on the performance indicators of photovoltaic modules, especially photoelectric conversion efficiency and cost control. Against this backdrop, negative-pitch photovoltaic modules have emerged as an innovative module packaging technology, demonstrating their enormous potential in improving the efficiency of photovoltaic systems.

[0059] Negative-pitch photovoltaic modules refer to modules where the spacing between adjacent cells in a cell string is negative. This means that not only are there no gaps between the cells, but they also overlap and stack at least partially. This allows for a more compact and efficient arrangement of a larger number of cells within the same physical space or area constraints, directly improving the photoelectric conversion efficiency of photovoltaic modules. It also significantly increases space utilization, paving a new path for the photovoltaic industry towards higher efficiency and lower costs.

[0060] However, despite the numerous advantages that negative-pitch photovoltaic modules exhibit in their theoretical design, they face significant technical challenges in actual production. Specifically, the precise and stable overlapping arrangement of the cells places extremely high demands on their alignment accuracy. Any minute deviation or misalignment can lead to impaired current transmission or light obstruction, resulting in a decrease in the overall photoelectric conversion efficiency and energy utilization of the negative-pitch photovoltaic module. This not only affects the actual power generation performance of the module but may also increase subsequent operation and maintenance costs and complexity, making large-scale commercial application of negative-pitch photovoltaic modules difficult.

[0061] In view of this, this application discloses a welding fixture and welding equipment, which can effectively improve the alignment accuracy between the cell substrate and the cell substrate, thereby improving the photoelectric conversion efficiency and space utilization of the photovoltaic module.

[0062] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0063] Please see Figure 1 ,in, Figure 1 This is a schematic diagram of the welding equipment disclosed in an embodiment of this application. In a first aspect, this application discloses a welding equipment 200, including a welding fixture 100 and a frame 202, with the welding fixture 100 disposed on the frame 202. This welding equipment 200 can improve the alignment accuracy between the solar cell substrate 400 and the solar cell substrate 400, and achieve at least partial overlap between two adjacent solar cell substrates 400, allowing more solar cell substrates 400 to be arranged within a limited area, thereby improving the photoelectric conversion efficiency and space utilization of the photovoltaic module.

[0064] Optionally, the frame 202 includes a frame 2021 and a platform 2022. The frame 2021 is mounted on the platform 2022, and the welding fixture 100 is rotatably mounted on the platform 2022 and located inside the frame 2021. The platform 2022 and the frame 2021 provide support and fixation. Specifically, the platform 2022 has a through hole so that the welding fixture 100 is located at the through hole, thereby saving height space in the height direction F3 of the frame 202. In the height direction of the frame 202, the frame 2021 is positioned above the platform 2022, and the length direction F5 and width direction F4 of the frame 202 are defined as follows: Figure 1 As shown.

[0065] Please see Figure 2 ,in, Figure 2 This is a schematic diagram of the structure of the first feeding mechanism disclosed in the embodiments of this application. In some embodiments, the welding equipment 200 further includes a first feeding mechanism 203, which includes a lifting unit 2031 and a supporting unit 2032. The lifting unit 2031 is disposed on the platform 2022, and the supporting unit 2032 is disposed on the lifting unit 2031. The supporting unit 2032 is configured to place the battery cell substrate 400.

[0066] Specifically, the lifting unit 2031 can move along the height direction F3 of the frame to facilitate the user placing the battery cell substrate 400. The lifting unit 2031 may include a motor (not shown) and a linear guide rail (not shown). The motor is rotatably connected to the linear guide rail, and the support unit 2032 is slidably connected to the guide rail, thereby driving the support unit 2032 to move along the height direction F3 of the frame.

[0067] Optionally, the support unit 2032 includes a support plate 2032b, and the support plate 2032b has limiting blocks 2032a on both sides along its length direction to limit the position of the battery cell substrate 400 on the support plate 2032b.

[0068] Furthermore, the supporting unit 2032 also includes a cylinder (not shown) and a slide rail (not shown). By setting the cylinder and slide rail on the lifting unit 2031, the supporting plate 2032b is slidably connected to the slide rail. The limiting blocks 2032a are set on both sides of the slide rail, so that the limiting blocks 2032a can move along the length direction of the supporting plate 2032b, so that the battery cell substrate 400 is centered on the supporting plate 2032b, realizing the initial positioning of the battery cell substrate 400, which facilitates the subsequent picking unit 2042 (see...). Figure 3A Align and pick up the battery cell substrate 400.

[0069] Please see Figure 3A ,in, Figure 3AThis is a schematic diagram of the second feeding mechanism and frame disclosed in an embodiment of this application. In some embodiments, the welding equipment 200 further includes a second feeding mechanism 204, which includes a moving unit 2041 and a picking unit 2042. The moving unit 2041 is movably connected to the frame 202, and the picking unit 2042 is disposed on the moving unit 2041. The moving unit 2041 can move relative to the frame 202 in a direction close to or away from the support unit 2032. The picking unit 2042 is configured to pick up the battery cell substrate 400 on the support unit 2032 and place it on the positioning member 12. Thus, the second feeding mechanism 204 can replace manual movement of the battery cell substrate 400, improving the automation level and operational accuracy of the welding equipment 200.

[0070] Optionally, the moving unit 2041 includes a driving component 2041a and a guide structure 2041b. The guide structure 2041b is disposed on the frame 2021. The driving component 2041a drives the picking unit 2042 to move on the guide structure 2041b, so that the moving unit 2041 can move along the height direction F3 and / or width direction F4 and / or length direction F5 of the frame 202, so that the battery cell substrate 400 can be accurately placed on the positioning member 12 by the picking unit 2042. The driving component 2041a can be a DC motor, servo motor, etc., and the guide structure 2041b can be, but is not limited to, a linear guide rail, linear slide, etc. disposed on the frame 2021.

[0071] Furthermore, the pickup unit 2042 is disposed on the moving unit 2041. The pickup unit 2042 includes a support block 2042a and a suction cup 2042b. The support block 2042a is disposed on the moving unit and has multiple through holes for placing the suction cups 2042b. Each through hole is provided with a suction cup 2042b. The suction cups 2042b can vacuum adsorb the battery cell substrate 400 through a connected adsorption mechanism, thereby realizing the pickup of the battery cell substrate 400. Of course, as other embodiments, the pickup method of the pickup unit 2042 can be other than vacuum adsorption, such as clamping or adhesion. This application embodiment does not limit this.

[0072] Please refer to it again. Figure 1In some embodiments, the welding equipment 200 further includes a heating mechanism 2, which is rotatably mounted on the frame 2021. The heating mechanism 2 can rotate relative to the frame 202 to adjust the position of the heating mechanism 2 corresponding to the positioning member 12. Since the positioning member 12 mounted on the rotating cylinder 11 needs to rotate to correspond to the heating mechanism 2 and perform heating welding, the position of the positioning member 12 is easily offset during rotation, making it difficult for the heating mechanism 2 to correspond to the positioning member 12. This application improves the welding quality and efficiency of the heating mechanism 2 for the battery cell substrate 400 by setting a rotatable heating mechanism 2 and adjusting the angle of the heating mechanism 2 to correspond to the positioning member 12, thereby further improving the production efficiency and energy utilization rate of the welding equipment 200.

[0073] Optionally, the rotatable connection between the heating mechanism and the frame 2021 may include, but is not limited to, pin connections, sleeve connections, universal joint connections, etc., and this application embodiment does not limit this. The aforementioned heating mechanism 2 may include, but is not limited to, laser heating tubes, infrared heating lamps, resistance heating mechanisms, electromagnetic induction heating mechanisms, hot air heating mechanisms, etc., and this application embodiment does not limit this.

[0074] It is understood that the positioning mechanism 1 of the welding fixture 100 is rotatably mounted on the platform 2022, the heating mechanism 2 of the welding fixture 100 is mounted on the frame 2021 and is located above the positioning mechanism 1 to correspond to the positioning mechanism 1, the welding fixture 100 is mounted on one side of the platform 2022 along the length direction F5 of the frame 202, the first feeding mechanism 203 is mounted on the other side of the platform 2022 along the length direction F5 of the frame 202, and the second feeding mechanism 204 is movably connected to the frame 2021 and is located above the first feeding mechanism 203 and the welding fixture 100.

[0075] The specific structure of the welding fixture 100 of the welding equipment 200 will be described in detail below.

[0076] Please see Figures 3B to 4 ,in, Figure 3B This is an exploded view of the welding fixture (heating mechanism omitted) disclosed in the embodiments of this application. Figure 4 This is a schematic structural diagram of the welding fixture (excluding the heating mechanism) disclosed in an embodiment of this application from one perspective. Secondly, this application also discloses a welding fixture 100, which is used to make the conductive wire 300 (e.g., Figure 8(As shown) is welded to multiple battery cell substrates 400. The welding fixture 100 includes a positioning mechanism 1, which includes a rotating cylinder 11 and multiple positioning elements 12. The rotating cylinder 11 has an outer peripheral surface 111, and the multiple positioning elements 12 are arranged sequentially along the outer peripheral surface 111 of the rotating cylinder 11. The positioning elements 12 are configured to place the battery cell substrates 400 and conductive wires 300, and along the circumferential direction F1 of the rotating cylinder 11, adjacent two positioning elements 12 are at least partially overlapped, so that two battery cell substrates 400 placed on the positioning elements 12 at least partially overlap. In addition, the welding fixture 100 also includes a heating mechanism 2, which is arranged corresponding to the positioning elements 12. The heating mechanism 2 is configured to heat the positioning elements 12 to weld the conductive wires 300 to the battery cell substrates 400.

[0077] To accommodate more solar cell substrates 400 within a limited area, this application employs positioning members 12 on a rotating cylinder 11. The position of the positioning members 12 on the rotating cylinder 11 determines the placement of the solar cell substrates 400 on those members. Furthermore, by utilizing the at least partial overlap of adjacent positioning members 12, the two solar cell substrates 400 placed on each positioning member 12 also overlap at least partially. This arrangement eliminates the need for individual adjustments to the solar cell substrates 400, improving alignment accuracy between them. Moreover, this assembly method simplifies the manufacturing process of the solar cell strings and reduces production costs. Thus, more solar cell substrates 400 can be arranged within a limited area, thereby improving the photoelectric conversion efficiency and space utilization of the photovoltaic module.

[0078] It is understood that the conductive wire 300 can be placed on the positioning member 12 first, and then the battery cell substrate 400 can be placed on the conductive wire 300; or the battery cell substrate 400 can be placed on the positioning member 12 first, and then the conductive wire 300 can be placed on the battery cell substrate 400. This application embodiment does not limit this.

[0079] It is understood that the cell substrate 400 can be a cell substrate with a back electrode structure, and multiple cell substrates 400 are connected by conductive wires 300 to form a cell string with overlapping areas. Alternatively, the cell substrate 400 can also be a cell substrate with a stacked grid electrode structure, and multiple cell substrates 400 are connected by conductive wires 300 to form a cell string with overlapping areas. Or, the cell substrate 400 can also be a cell substrate with a conventional electrode structure, and multiple cell substrates 400 are welded together using conductive wires 300 instead of solder ribbons to form a cell string with overlapping areas. This application does not limit the scope of this embodiment.

[0080] The conductive wire 300 may include, but is not limited to, flat conductive wire, cylindrical conductive wire, triangular conductive wire, etc., and the embodiments of this application do not limit it.

[0081] Please see Figures 5 to 6 ,in, Figure 5 This is a front view of the welding fixture (heating mechanism omitted) disclosed in the embodiments of this application. Figure 6 for Figure 5 A partial enlarged view of point A. In some embodiments, an overlapping area is formed between two adjacent positioning members 12 in the circumferential direction F1 of the rotating cylinder 11. The width D of the overlapping area in the circumferential direction F1 of the rotating cylinder 11 is 1mm-2mm. For example, the width D of the overlapping area in the circumferential direction F1 of the rotating cylinder 11 may include, but is not limited to, 1.0mm-1.2mm, 1.2mm-1.4mm, 1.4mm-1.6mm, 1.6mm-1.8mm, 1.8mm-2.0mm, etc. For example, the width D of the overlapping area along the circumferential direction F1 of the rotating cylinder 11 may include, but is not limited to, 1.0mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, 1.95mm, 2.0mm, etc., and this application embodiment does not specifically limit it.

[0082] With this configuration, the overlapping area is the overlapping area of ​​two adjacent cell substrates 400. By reasonably setting the overlapping area, metallized contact can be achieved between the cell substrates 400, thereby reducing the recombination rate on the surface of the cell substrates 400 and improving the photoelectric conversion efficiency of the photovoltaic module. At the same time, it can also effectively utilize solar energy, enabling the cell string to provide higher power output, allowing more photovoltaic modules to be installed in the same area, thereby reducing the installation cost per unit area.

[0083] When the width D of the overlapping area along the circumferential direction F1 of the rotating cylinder 11 is less than 1mm, the overlapping area of ​​two adjacent cell substrates 400 will be small, making it easy for the cell substrates 400 to make direct contact, increasing the risk of short circuit in the cell string and thus damaging the photovoltaic module.

[0084] When the width D of the overlapping area along the circumferential direction F1 of the rotating cylinder 11 is greater than 2mm, the overlapping area of ​​the two adjacent cell substrates 400 will be large, resulting in excessive shading of the cell substrate 400, which leads to a decrease in the photoelectric utilization rate of the cell substrate 400 and reduces the photoelectric conversion efficiency of the photovoltaic module.

[0085] Please see Figures 7 to 8 ,in, Figure 7 This is a schematic diagram of the welding fixture (excluding the heating mechanism) disclosed in an embodiment of this application from another perspective. Figure 8 for Figure 7 A partial enlarged view at point B. Optionally, the two adjacent positioning members 12 are respectively the first positioning member 123 and the second positioning member 124. Along the thickness direction of the first positioning member 123, the first positioning member 123 is located above the second positioning member 124, so that the two battery cell substrates 400 placed on the first positioning member 123 and the second positioning member 124 achieve at least partial overlap.

[0086] Optionally, the second positioning member 124 has a plurality of guide posts 127 on one side edge near the first positioning member 123. The guide posts 127 are configured to be located on both sides of the conductive wire positioning groove 121 along the axial direction F2 of the rotating cylinder 11 to guide the conductive wire 300 into the conductive wire positioning groove 121. By providing guide posts 127 on both sides of the conductive wire positioning groove 121 along the axial direction F2 of the rotating cylinder 11, the conductive wire 300 can be guided when it enters the conductive wire positioning groove 121, thereby preventing the conductive wire 300 from becoming skewed and further improving the product yield of the photovoltaic module.

[0087] Please refer to it again. Figure 8 In some embodiments, the welding fixture 100 further includes a preheating element 13, which is disposed inside the rotating cylinder 11 and corresponds to the position of the positioning element 12. The preheating element 13 is configured to preheat the positioning element 12. By providing the preheating element 13 inside the rotating cylinder 11 and positioning it corresponding to the position of the positioning element 12, the battery cell substrate 400 on the positioning element 12 is preheated, which improves the welding efficiency of the welding fixture 100 and reduces the problem of warping of the battery cell substrate 400 during welding. This allows the battery cell substrate 400 to make full contact with the conductive wire 300, thereby improving the welding effect of the welding fixture 100.

[0088] The preheating component 13 may include, but is not limited to, heating blocks, heating plates, heating rods, etc., and this application embodiment does not limit this.

[0089] Please see Figure 9 ,in, Figure 9This is a schematic diagram of the positioning component disclosed in an embodiment of this application. In some embodiments, the positioning component 12 is provided with multiple conductive wire positioning grooves 121, which are spaced apart. Each conductive wire positioning groove 121 passes through the positioning component 12 along the circumferential direction F1 of the rotating cylinder 11. In two adjacent positioning components 12, the conductive wire positioning groove 121 on one positioning component 12 corresponds to the conductive wire positioning groove 121 on the other positioning component 12. The conductive wire positioning groove 121 is used for the conductive wire 300 to pass through. By providing conductive wire positioning grooves 121 on the positioning component 12, the conductive wire 300 is positioned, preventing the conductive wire 300 from tilting or flipping during the welding process with the solar cell substrate 400, thereby improving the photoelectric conversion efficiency and energy utilization rate of the photovoltaic module.

[0090] It is understandable that, considering that the conductive wire 300 is usually a very small metal wire, for example, the size of the conductive wire 300 is approximately a filamentary structure with a width of less than 0.15 mm, a large number of conductive wires 300 can usually be set on a battery cell substrate 400, for example, 92 wires. Based on this, the number of conductive wire positioning grooves 121 on the positioning member 12 is also large, and two adjacent conductive wire positioning grooves 121 are spaced apart, so as to reserve the light-receiving area of ​​the battery cell substrate 400, which is beneficial to the light-receiving of the battery cell substrate 400.

[0091] Please see Figure 10 ,in, Figure 10This is a front view of the positioning member disclosed in an embodiment of this application. Optionally, the plurality of conductive wire positioning grooves 121 include a plurality of first sub-grooves 1211 and a plurality of second sub-grooves 1212. The plurality of first sub-grooves 1211 and the plurality of second sub-grooves 1212 are alternately spaced along the axial direction F2 of the rotating cylinder 11, and the first sub-grooves 1211 on one positioning member 12 correspond to the second sub-grooves 1212 on an adjacent positioning member 12. One end of the first sub-groove 1211 along the circumferential direction F1 is configured to penetrate the positioning member 12 along the thickness direction of the positioning member 12, so that the conductive wire 300 is continuous on the first sub-groove 1211 on one positioning member 12 with the second sub-groove 1212 on an adjacent positioning member 12, thereby connecting two adjacent battery cell substrates 400. Thus, the first sub-grooves 1211 and the second sub-grooves 1212 of two adjacent battery cell substrates 400 are staggered, so that the conductive wire 300 of the first sub-grooves 1211 on one of the battery cell substrates 400 extends and bends through one end of the through-positioning member 12 of the first sub-grooves 1211 to the second sub-grooves 1212 on the adjacent battery cell substrate 400. The conductive wire 300 of the second sub-grooves 1212 on one of the battery cell substrates 400 also extends but does not bend, which facilitates subsequent cutting so that the conductive wire 300 of the second sub-grooves 1212 on one of the battery cell substrates 400 is discontinuous with the conductive wire 300 of the first sub-grooves 1211 on the adjacent battery cell substrate 400.

[0092] Optionally, the positioning member 12 is provided with a placement groove 122, which is configured to place the solar cell substrate 400. The placement groove 122 has a bottom surface 1221, and the conductive wire positioning groove 121 is disposed on the bottom surface 1221. By providing a placement groove 122 for placing the solar cell substrate 400 on the positioning member 12, the placement position of the solar cell substrate 400 can be precisely controlled, and the problem of relative displacement between the solar cell substrate 400 and the conductive wire 300 can be avoided. This allows the solar cell substrate 400 to achieve better alignment with the conductive wire 300, thereby increasing the light-receiving area of ​​the solar cell substrate 400 and further improving the photoelectric conversion efficiency of the photovoltaic module. At the same time, the relatively fixed positions of the placement grooves 122 on the multiple positioning members 12 also allow for better alignment between adjacent solar cell substrates 400, thereby effectively improving the yield of the photovoltaic module.

[0093] Optionally, the connection method between the positioning member 12 and the rotating cylinder 11 may include, but is not limited to, threaded connection, adhesive bonding, welding, etc., and the embodiments of this application do not limit this.

[0094] For example, when the connection between the positioning member 12 and the rotating cylinder 11 is a threaded connection, the rotating cylinder 11 may be provided with threaded holes, and the positioning member 12 is provided with multiple adjustment holes 125 on both sides of the rotating cylinder 11 along the axial direction F2 (e.g., Figure 9 As shown in the diagram, the positioning element 12 is connected to the rotating cylinder 11 via a connector (not shown) passing through the adjustment hole 125 and the threaded hole. This connection method is not only simple and reliable, but also has high connection strength. The connector can be a screw, bolt, or other similar component. By adjusting the tightness of the screw, the tight connection between the positioning element 12 and the rotating cylinder 11 can be further ensured, improving the operational stability of the welding fixture 100.

[0095] Optionally, along the circumferential direction F1 of the rotating cylinder 11, the adjusting hole 125 on the positioning member 12 has a preset length. The adjusting hole 125 is connected to the rotating cylinder 11 via a connector to adjust the installation position of the positioning member 12 in the circumferential direction F1 of the rotating cylinder 11. Thus, the position of the positioning member 12 along the circumferential direction F1 of the rotating cylinder 11 can be moved along the preset length, thereby adjusting the position of the positioning member 12 in the circumferential direction F1 of the rotating cylinder 11, thereby improving the compatibility of the welding fixture 100.

[0096] Please see Figures 11 to 12 ,in, Figure 11 This is a schematic diagram of the structure of the rotating cylinder disclosed in the embodiments of this application. Figure 12 This is a front view of the rotating cylinder disclosed in the embodiments of this application. In some embodiments, the outer peripheral surface 111 of the rotating cylinder 11 includes a plurality of oblique cut surfaces 1111 connected sequentially along the circumferential direction F1 of the rotating cylinder 11, and each oblique cut surface 1111 is used to set a positioning member 12. Since the battery cell substrate 400 is a plane rather than a curved surface, the positioning member 12 used to place the battery cell substrate 400 also needs to be a plane. In this way, by setting a plurality of oblique cut surfaces 1111 on the outer peripheral surface 111 of the rotating cylinder 11, and each positioning member 12 can be correspondingly set on each oblique cut surface 1111, the contact area between the positioning member 12 and the rotating cylinder 11 can be increased, providing a better support foundation for fixing the positioning member 12, thereby ensuring the operational stability of the welding fixture 100.

[0097] Please refer to it again. Figure 11 In some embodiments, the rotating cylinder 11 is provided with a plurality of first through holes 112, and the positioning member 12 is provided with a plurality of second through holes 126 (e.g., ...). Figure 9 As shown), the first through hole 112 and the second through hole 126 are connected to each other. The first through hole 112 is configured to connect to the adsorption mechanism (not shown) to adsorb the battery cell substrate 400.

[0098] It is understood that multiple second through holes 126 are provided on the positioning member 12, and multiple first through holes 112 are provided on the rotating cylinder 11. The first through holes 112 and the second through holes 126 are correspondingly connected, and the first through holes 112 are connected to the adsorption mechanism. This allows the battery cell substrate 400 placed on the positioning member 12 to be adsorbed by the adsorption mechanism through the second through holes 126, thereby fixing the battery cell substrate 400 on the positioning member 12. This is because the welding fixture 100 needs to rotate the rotating cylinder 11 during the welding process to heat the battery cell substrate 400 on each positioning member 12. This application uses the adsorption mechanism to adsorb and fix the battery cell substrate 400 on the positioning member 12, so as to ensure that the battery cell substrate 400 can be better fixed on the positioning member 12, preventing the battery cell substrate 400 from shifting or falling off during rotation, thereby improving the welding quality of the welding fixture 100.

[0099] Correspondingly, the adsorption mechanism can also adopt vacuum adsorption. This fixing method will not affect the product quality of the battery cell substrate 400, avoid damage to the battery cell substrate 400, and help improve the operational reliability of the welding fixture 100.

[0100] The following is a brief description of the operation of the welding equipment 200:

[0101] When using the welding equipment 200, the conductive wire 300 can first be positioned in the conductive wire positioning groove 121, and the lifting unit 2031 lowers the support unit 2032 to a certain height, making it easier for the user to place the battery cell substrate 400 on the support unit 2032. The support unit 2032 achieves the centering of the battery cell substrate 400 by moving the limiting blocks 2032a on both sides. Then, the lifting unit 2031 raises the support unit 2032 to a certain height to match the moving unit 2041 above, making it easier for the picking unit 2042 on the moving unit 2041 to pick up the battery cell substrate 400 located on the support unit 2032. Then, the moving unit 2041 moves on the frame 202 to move the battery cell substrate 400 from the support unit 2032 and place it on the positioning part 12 of the welding fixture 100, and place it in the corresponding placement groove 122. By rotating the rotating cylinder 11 equipped with conductive wires 300, the corresponding positioning element 12 can be switched so that multiple battery cell substrates 400 are positioned corresponding to multiple positioning elements 12. At this time, the preheating element 13 can continuously preheat the battery cell substrates 400 on the positioning elements 12, and the adsorption mechanism continuously adsorbs and fixes the battery cell substrates 400 on the positioning elements 12. Finally, the heating mechanism 2 heats and welds the battery cell substrates 400 on each positioning element 12 so that the battery cell substrates 400 are welded to the conductive wires 300.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A welding fixture, characterized in that, The welding fixture is used to weld conductive wires to multiple battery cell substrates, and the welding fixture includes: The positioning mechanism includes: A rotating cylinder having an outer peripheral surface; Multiple positioning elements are arranged sequentially along the outer circumferential surface of the rotating cylinder. The positioning elements are configured to place battery cell substrates and conductive wires. Along the circumferential direction of the rotating cylinder, adjacent positioning elements are at least partially overlapped, such that two battery cell substrates placed on the positioning elements at least partially overlap. A heating mechanism is provided corresponding to the positioning member, and the heating mechanism is configured to heat the positioning member to weld the conductive wire to the battery cell substrate.

2. The welding fixture according to claim 1, characterized in that, In the circumferential direction of the rotating cylinder, an overlapping area is formed between two adjacent positioning members, and the width of the overlapping area in the circumferential direction of the rotating cylinder is 1mm-2mm.

3. The welding fixture according to claim 1, characterized in that, The positioning member is provided with a plurality of conductive wire positioning grooves, which are spaced apart. Each conductive wire positioning groove passes through the positioning member along the circumferential direction of the rotating cylinder. In two adjacent positioning members, the conductive wire positioning groove on one positioning member corresponds to the conductive wire positioning groove on the other positioning member. The conductive wire positioning groove is used for the conductive wire to pass through.

4. The welding fixture according to claim 3, characterized in that, The plurality of conductive wire positioning grooves include a plurality of first sub-grooves and a plurality of second sub-grooves. The plurality of first sub-grooves and the plurality of second sub-grooves are alternately spaced along the axial direction of the rotating cylinder, and the first sub-grooves on one positioning member correspond to the second sub-grooves on the adjacent positioning member. Wherein, one end of the first sub-groove along the circumferential direction is configured to penetrate the positioning member along the thickness direction of the positioning member, so that the conductive wire is continuous on the first sub-groove on one positioning member and on the second sub-groove on the adjacent positioning member, so as to connect the two adjacent battery cell substrates.

5. The welding fixture according to claim 3, characterized in that, The positioning element is provided with a placement groove, which is configured to place the battery cell substrate. The placement groove has a bottom surface, and the conductive wire positioning groove is disposed on the bottom surface of the groove.

6. The welding fixture according to claim 3, characterized in that, The two adjacent positioning elements are respectively the first positioning element and the second positioning element. Along the thickness direction of the first positioning element, the first positioning element is located above the second positioning element. The second positioning member has a plurality of guide posts on one side edge near the first positioning member. The plurality of guide posts are configured to be located on both sides of the conductive wire positioning groove along the axial direction of the rotating cylinder to guide the conductive wire into the conductive wire positioning groove.

7. The welding fixture according to any one of claims 1-6, characterized in that, The outer circumferential surface of the rotating cylinder includes a plurality of oblique cut surfaces connected sequentially along the circumferential direction of the rotating cylinder, each oblique cut surface being used to set one of the positioning elements; and / or The positioning member has multiple adjustment holes on both sides of the rotating cylinder along the axial direction. The adjustment holes have a preset length along the circumferential direction of the rotating cylinder. The adjustment holes are connected to the rotating cylinder via connectors to adjust the installation position of the positioning member in the circumferential direction of the rotating cylinder; and / or, The welding fixture further includes a preheating component disposed within the rotating cylinder and corresponding to the position of the positioning component, the preheating component being configured to preheat the positioning component; and / or The rotating cylinder is provided with a plurality of first through holes, and the positioning member is provided with a plurality of second through holes. The first through holes and the second through holes are connected to each other. The first through holes are configured to connect to an adsorption mechanism to adsorb the battery cell substrate.

8. A welding device, characterized in that, It includes the welding fixture and frame as described in any one of claims 1-7, wherein the welding fixture is disposed on the frame.

9. The welding equipment according to claim 8, characterized in that, The welding equipment also includes: A first feeding mechanism, comprising a lifting unit and a carrying unit, wherein the lifting unit is disposed on the frame, and the carrying unit is disposed on the lifting unit, and the carrying unit is configured to hold the battery cell substrate; and... The second feeding mechanism includes a moving unit and a picking unit. The moving unit is movably connected to the frame, and the picking unit is disposed on the moving unit. The moving unit can move relative to the frame in a direction close to or away from the carrier unit. The picking unit is configured to pick up the battery cell substrate on the carrier unit and place it on the positioning member.

10. The welding equipment according to claim 8 or 9, characterized in that, The heating mechanism is rotatably mounted on the frame, and the heating mechanism can rotate relative to the frame to adjust the position of the heating mechanism corresponding to the positioning member.

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