Series welding machine

Abstract

When the series welding machine is used, an electromagnet is switched to a first working state, the electromagnet and a permanent magnet attract each other by opposite poles, and a driving plate correspondingly drives all pressing needles to move towards a direction close to a battery piece under the action of magnetic attraction force, so that the pressing needles abut against a welding strip on the battery piece; therefore, the welding operation of the welding strip on the battery piece can be carried out. Therefore, by flexibly adjusting and controlling the polarity of the electromagnet, opposite-pole attraction between the driving plate and the mounting plate is realized. The magnetism of the permanent magnet and the magnetism of the electromagnet are fixed, so that the force for driving the driving plate to move downwards is fixed, the downward moving distance of each pressing needle is fixed, the accuracy of the lifting positions of the pressing needles is improved, the welding accuracy is improved, the insufficient welding defect can be avoided, and the welding quality is improved.

Description

Technical Field

[0001] This application relates to the field of solar cell welding technology, and in particular to a string welding machine. Background Technology

[0002] Photovoltaic modules are used to convert solar energy into electrical energy. They typically consist of multiple solar cells, which are connected in series by solder ribbons (also called welding wires). The series welding of solar cells is generally performed using a series welder, which welds the solder ribbons onto the solar cells, for example, onto the main grid lines. By sequentially connecting the front of one solar cell to the back of the next, multiple solar cells are welded into a string.

[0003] However, during the operation of the string welding machine, the phenomenon of incomplete welding is prone to occur between the welding strip and the battery cell. The manifestations of incomplete welding in string welding machines mainly include incomplete welding, detachment, or false welding, which leads to low welding efficiency. Utility Model Content

[0004] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a string welding machine that can guarantee welding quality, effectively avoid incomplete welding defects, and improve welding efficiency.

[0005] A string welding machine, the string welding machine comprising:

[0006] A workbench for placing battery cells;

[0007] A mounting plate having a plurality of through holes formed thereon, each of the through holes penetrating the mounting plate along its thickness direction;

[0008] Multiple pressure needles, each pressure needle being movably inserted into one of the multiple through holes; and

[0009] A drive plate is located above the mounting plate, and all the pressure pins are connected to the drive plate. One of the drive plate and the mounting plate is equipped with an electromagnet, and the other of the drive plate and the mounting plate is equipped with a permanent magnet. When the electromagnet is working in the first working state, the polarity of the electromagnet is opposite to that of the permanent magnet, and the drive plate drives all the pressure pins to move towards the battery cell, so that the pressure pins abut against the solder strip on the battery cell.

[0010] In one embodiment, when the electromagnet is operating in the second operating state, the polarity of the electromagnet is the same as that of the permanent magnet, and the drive plate drives all the pressure pins to move away from the battery cell, so that the pressure pins are separated from the solder strips on the battery cell.

[0011] In one embodiment, the top end of each of the pressure pins is connected to the drive plate; the bottom end of each of the pressure pins is provided with a limiting part, and when the electromagnet is working in the second working state, the limiting part abuts against the bottom surface of the mounting plate.

[0012] In one embodiment, all the through holes are arranged in multiple columns on the mounting plate, and each column of through holes is configured to correspond to the position of each solder strip of the battery cell.

[0013] In one embodiment, the mounting plate has a plurality of parallel and spaced grooves inside, each groove being connected to a corresponding column of through holes, and the pressure pins passing through the columns of through holes also passing through the grooves; the string welding machine also includes a plurality of sliding members, each sliding member being slidably disposed up and down inside each groove, and each sliding member being connected to all the pressure pins in its corresponding groove.

[0014] In one embodiment, the mounting plate is further provided with two adjustment slots, which are respectively located at opposite ends of each of the sliding grooves, and all the sliding grooves are respectively connected to each of the adjustment slots;

[0015] The stringing machine further includes two adjusting members, two moving members, and at least two elastic members. Each adjusting member is correspondingly and slidably disposed in each adjusting groove, and each sliding member is connected to two adjusting members at opposite ends. The two moving members are respectively disposed in the two adjusting grooves, and each moving member abuts against the adjusting members. Each adjusting groove is also provided with at least one elastic member, which is located on the side of the moving member away from the adjusting member. Each moving member is connected to the inner wall of each adjusting groove through at least one elastic member. When the adjusting member moves toward the direction of the battery cell, each adjusting member can synchronously drive the corresponding moving member to move along the lateral direction of the adjusting groove and compress the elastic member.

[0016] In one embodiment, the adjusting member is provided with a first guide slope for abutting and engaging with the moving member, and / or the moving member is provided with a second guide slope for abutting and engaging with the adjusting member;

[0017] The inner wall of the adjustment groove is provided with a slide rail, and the moving part is connected to a guide member, which is slidably disposed in the slide rail.

[0018] In one embodiment, the string welding machine further includes a lifting mechanism connected to the mounting plate. The lifting mechanism is used to drive the mounting plate to move up and down, so that the mounting plate drives the drive plate and the pressure pin to move up and down.

[0019] In one embodiment, the top surface of the workbench is formed with a placement groove for placing the battery cell.

[0020] In one embodiment, the string welding machine further includes a negative pressure mechanism, and a negative pressure hole is provided on the inner wall of the placement groove, with the negative pressure mechanism communicating with the negative pressure hole.

[0021] In the aforementioned string welding machine, the electromagnet is switched to its first working state. The electromagnet and the permanent magnet, being of opposite polarities, attract each other. Under the magnetic attraction, the drive plate moves all the pressure pins towards the solar cell, allowing them to contact the welding strips on the solar cell and thus enabling the welding operation. Therefore, by flexibly adjusting and controlling the polarity of the electromagnet, the opposite polarity attraction between the drive plate and the mounting plate is achieved. The magnetism of the permanent magnet and the magnetism of the electromagnet are fixed, resulting in a fixed force driving the drive plate downwards and a fixed downward distance for each pressure pin. This improves the accuracy of the pressure pin's lifting and lowering position, thereby improving the welding accuracy, avoiding defects such as incomplete welds, and improving welding quality. Attached Figure Description

[0022] Figure 1 This is a structural view of a string welding machine according to an embodiment of this application.

[0023] Figure 2 for Figure 1 The diagram shows another perspective of the string welding machine.

[0024] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the string welding machine.

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A.

[0026] Figure 5 for Figure 1 The diagram shows the structure of the pressure pin, drive plate, sliding parts, and adjusting parts in the string welding machine.

[0027] 10. Workbench; 11. Placement slot; 12. Chamber; 20. Mounting plate; 21. Through hole; 22. Recess; 23. Slide groove; 24. Adjustment groove; 241. Slide rail; 30. Pressure needle; 31. Limiting part; 40. Drive plate; 50. Battery cell; 60. Welding strip; 70. Sliding part; 81. Adjusting part; 811. First guide slope; 82. Moving part; 821. Second guide slope; 822. Guide part; 8221. Anti-detachment protrusion; 83. Elastic part; 91. Lifting mechanism; 911. Drive motor; 912. Lead screw; 913. Guide rod; 92. Bracket; 921. Support plate; 922. Support column; 923. Protrusion; 93. Negative pressure mechanism; 94. Suction tube. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] As described in the background section, existing string welding machines often experience incomplete welds between the welding ribbon and the solar cell during operation. The inventors have discovered that this problem arises because the longer the string welding machine is used, the more likely its internal components will age. When a weld is incomplete, it indicates a large gap exists between the welding ribbon and the solar cell at the corresponding weld point. This prevents current from flowing smoothly through the weld point, hindering proper welding. Furthermore, it suggests that the pressure pins on the string welding machine failed to reach the designated height during downward movement, resulting in a large gap between them and the welding ribbon on the solar cell, leading to incomplete welds and affecting welding efficiency.

[0030] Based on the above reasons, the present invention provides a string welding machine that can improve welding quality, effectively avoid incomplete welding defects, and improve welding efficiency.

[0031] See Figures 1 to 3 , Figure 1 and Figure 2 Two different viewpoint structural diagrams of a string welding machine according to an embodiment of this application are shown. Figure 3 It shows Figure 1The diagram shows a cross-sectional view of the stringing machine. One embodiment of this application provides a stringing machine comprising: a worktable 10, a mounting plate 20, multiple pressure pins 30, and a drive plate 40. The worktable 10 is used to place the battery cell 50. Multiple through holes 21 are formed on the mounting plate 20, each through hole 21 penetrating the mounting plate 20 along its thickness direction. The multiple pressure pins 30 are movably disposed in the multiple through holes 21 in a corresponding manner. The drive plate 40 is located above the mounting plate 20, and all the pressure pins 30 are connected to the drive plate 40. One of the drive plate 40 and the mounting plate 20 is equipped with an electromagnet, and the other is equipped with a permanent magnet. When the electromagnet operates in a first operating state, the polarity of the electromagnet is opposite to that of the permanent magnet, and the drive plate 40 drives all the pressure pins 30 to move towards the battery cell 50, so that the pressure pins 30 abut against the welding strip 60 on the battery cell 50.

[0032] In some embodiments, the pressure pin 30 is slidably disposed in the through hole 21. The through hole 21 guides the up-and-down movement of the pressure pin 30, which can improve the stability of the up-and-down movement of the pressure pin 30 and help to ensure that all the pressure pins 30 stably abut against the welding strip 60, thereby effectively preventing the defect of incomplete welding.

[0033] In the aforementioned string welding machine, the electromagnet switches to its first working state. The electromagnet and permanent magnet attract each other due to their opposite polarities. Under the magnetic attraction, the drive plate 40 moves all the pressure pins 30 towards the solar cell 50, allowing the pressure pins 30 to contact the welding strips 60 on the solar cell 50, thus enabling the welding operation on the welding strips 60. Therefore, by flexibly adjusting and controlling the polarity of the electromagnet, the opposite polarity attraction between the drive plate 40 and the mounting plate 20 is achieved. The magnetism of the permanent magnet is fixed, and the magnetism of the electromagnet is also fixed, thus fixing the force driving the drive plate 40 downwards and the downward distance of each pressure pin 30. This improves the accuracy of the pressure pins 30's lifting and lowering positions, thereby improving the welding accuracy and avoiding defects such as incomplete welds. The welding efficiency is high, effectively solving the problem in related technologies where the pressure pins 30 fail to reach the designated position during downward movement for welding, resulting in a large gap with the welding strips 60 on the solar cell 50, leading to incomplete welds and low welding efficiency.

[0034] In one embodiment, when the electromagnet operates in the second operating state, the polarity of the electromagnet is the same as that of the permanent magnet. The drive plate 40 moves all the pressure pins 30 away from the battery cell 50, so that the pressure pins 30 separate from the solder strips 60 on the battery cell 50. After the soldering of the solder strips 60 on the battery cell 50 is completed, the electromagnet switches to the second operating state. The electromagnet and the permanent magnet, being of the same polarity, repel each other, and the drive plate 40 moves all the pressure pins 30 away from the battery cell 50 to reset, ready for the next pressing operation.

[0035] In some specific embodiments, the permanent magnet is disposed, for example, on the top surface of the mounting plate 20, and the electromagnet is disposed, for example, inside the drive plate 40. When the electromagnet operates in the first operating state, the polarity of the electromagnet is opposite to that of the permanent magnet, and opposite poles attract each other. The drive plate 40 drives all the pressure pins 30 to move towards the battery cell 50, so that the pressure pins 30 abut against the solder strips 60 on the battery cell 50. The bottom surface of the drive plate 40 is in contact with the top surface of the mounting plate 20, for example, that is, the drive plate 40 moves downward to the limit position. The specific movement stroke of the drive plate 40 is controllable.

[0036] In some embodiments, the top end of each pressure pin 30 is connected to the drive plate 40. Furthermore, each pressure pin 30 has a limiting portion 31 at its bottom end. When the electromagnet is operating in the second working state, the limiting portion 31 abuts against the bottom surface of the mounting plate 20, thereby limiting its movement and preventing the pressure pin 30 from continuing to move upwards under the repulsive force between the electromagnet and the permanent magnet, which could cause the pressure pin 30 and the drive plate 40 to detach upwards from the mounting plate 20, thus improving stability.

[0037] The limiting part 31 has a cross-sectional dimension larger than that of the through hole 21 along the extension direction of the through hole 21, so that the limiting part 31 cannot enter the through hole 21 and thus abut against the mounting plate 20, thereby playing a limiting role.

[0038] Based on the aforementioned embodiment, the bottom surface of the mounting plate 20 has a recess 22 recessed in a direction away from the worktable 10. When the electromagnet is operating in the second working state, each limiting part 31 is located within the recess 22 and abuts against the top wall of the recess 22. Furthermore, the bottom surface of the limiting part 31 is flush with the area outside the recess 22 on the bottom surface of the mounting plate 20, or the bottom surface of the limiting part 31 is further away from the worktable 10 than the area outside the recess 22 on the bottom surface of the mounting plate 20. Thus, when the mounting plate 20 moves towards the top surface of the worktable 10, the area outside the recess 22 on the bottom surface of the mounting plate 20 can abut against the top surface of the worktable 10 and act as a limiting element, thereby improving the stability of subsequent welding work and preventing the limiting part 31 from contacting the solder strip 60 on the battery cell 50, which would prevent the area outside the recess 22 on the bottom surface of the mounting plate 20 from properly abutting against the top surface of the worktable 10.

[0039] Please refer to Figure 1 The number of solder ribbons 60 on the battery cell 50 is multiple and arranged sequentially at intervals. Each solder ribbon 60 has multiple pressure pins 30 along its length. When multiple pressure pins 30 simultaneously abut against the solder ribbon 60, welding operations can be performed at various positions along the length of the solder ribbon 60.

[0040] Please see Figure 1 and Figure 2 In one embodiment, all the through holes 21 are arranged in multiple rows on the mounting plate 20, and each row of through holes 21 is configured to correspond to the position of each solder strip 60 on the battery cell 50. In this way, multiple positions along the length of each solder strip 60 are corresponding to the pressure pins 30 abutting, thereby enabling welding operations to be performed.

[0041] Please see Figure 3 and Figure 4 In one embodiment, the mounting plate 20 has multiple parallel and spaced grooves 23 inside. Each groove 23 is connected to a corresponding row of through holes 21, and the pressure pins 30 passing through the through holes 21 also pass through the corresponding grooves 23. The string welding machine also includes multiple sliding members 70. Each sliding member 70 is slidably disposed inside each groove 23, and each sliding member 70 is connected to all the pressure pins 30 in its corresponding groove 23. In this way, one sliding member 70 can connect all the pressure pins 30 passing through the corresponding groove 23 together, so that each pressure pin 30 moves up and down synchronously with the same stroke, thereby ensuring that each position of a welding strip 60 is abutted by the pressure pins 30, avoiding incomplete connections and effectively improving welding quality and work efficiency.

[0042] The slider 70 may include, but is not limited to, being configured as a strip, rod, or plate. Optionally, the slider 70 extends from one end of the groove 23 to the other end of the sliding groove.

[0043] Please see Figures 3 to 5In one embodiment, the mounting plate 20 is further provided with two adjustment grooves 24. The two adjustment grooves 24 are respectively disposed at opposite ends of each sliding groove 23. All sliding grooves 23 are respectively connected to each adjustment groove 24. In addition, the string welding machine also includes two adjusting members 81, two moving members 82, and at least two elastic members 83. Each adjusting member 81 is correspondingly and slidably disposed in each adjustment groove 24, and each sliding member 70 is connected to two adjusting members 81 at opposite ends. The two moving members 82 are respectively disposed in the two adjustment grooves 24. Each moving member 82 abuts against each adjusting member 81. Each adjustment groove 24 is further provided with at least one elastic member 83, which is located on the side of the moving member 82 opposite to the adjusting member 81. Each moving member 82 is connected to the inner wall of each adjustment groove 24 through at least one elastic member 83. When the adjusting member 81 moves towards the battery cell 50, each adjusting member 81 can synchronously drive the corresponding moving member 82 to move along the lateral direction of the adjusting groove 24 and compress the elastic member 83. In this way, on the one hand, the elastic member 83 buffers the downward pressing action of the pressure needle 30, which can reduce the force when the pressure needle 30 touches the welding strip 60 and reduce the degree of collision damage to the pressure needle 30; on the other hand, after the welding strip 60 is completed, not only does the driving plate 40 and the pressure needle 30 reset under the repulsive force of the electromagnet and the permanent magnet, but the reset force of the elastic member 83 can also play a role at the same time, which is conducive to realizing the upward movement and reset of the driving plate 40 and the pressure needle 30.

[0044] It should be noted that the number of elastic elements 83 inside each adjusting groove 24 is not limited to one, but can be multiple, such as two, three, four, six or other numbers, which are not limited here. When multiple elastic elements 83 are used, the multiple elastic elements 83 are arranged sequentially at intervals along the longitudinal direction of the adjusting groove 24, and each elastic element 83 is connected to the moving part 82, playing a buffering role against the lateral movement of the moving part 82. The elastic element 83 can be a spring, elastic block, elastic strip or elastic column, etc.

[0045] To improve the stability of the lifting and lowering motion of each pressure needle 30, the number of elastic elements 83 in each adjustment groove 24 is the same. This way, when the drive plate 40 moves downward, the elastic buffer force at the opposite ends along the longitudinal direction of the slide groove 23 is the same, making the operation relatively stable and reliable.

[0046] As some alternative solutions, after the welding strip 60 is completed, the electromagnet is not limited to switching to the second working state as in the above embodiment to realize the reset action of the drive plate 40 and the pressure needle 30. It can also be switched to the power-off state, and the reset action of the drive plate 40 and the pressure needle 30 can be realized, for example, by the reset force of the elastic member 83.

[0047] Please see Figure 4 and Figure 5 In order to enable the adjusting member 81 to drive the moving member 82 to move laterally while moving downward, the adjusting member 81 is provided with a first guide slope 811 for abutting and cooperating with the moving member 82, and / or the moving member 82 is provided with a second guide slope 821 for abutting and cooperating with the adjusting member 81. Thus, when the adjusting member 81 moves downward, under the guidance of the first guide slope 811 and / or the second guide slope 821, the moving member 82 can be pushed to move laterally within the adjusting groove 24.

[0048] Optionally, both the first guide slope 811 and the second guide slope 821 are, but are not limited to, straight slopes. The inclination angle relative to the horizontal plane (i.e., the surface parallel to the battery cell 50) is, but is not limited to, 15°, 30°, 45°, 60°, or 75°, etc., which can be flexibly adjusted and set according to actual needs. When the adjusting member 81 is provided with the first guide slope 811 and the moving member 82 is provided with the second guide slope 821, the first guide slope 811 and the second guide slope 821 abut against each other, and their inclination angles relative to the horizontal plane are the same.

[0049] Of course, the first guide slope 811 and the second guide slope 821 can also be set as arc-shaped surfaces or other irregularly shaped slopes, as long as they can realize the vertical movement of the adjusting member 81 to generate a thrust on the lateral movement of the moving member 82, so that the moving member 82 can move in the lateral direction.

[0050] Please see Figure 1 and Figure 4 Based on the aforementioned embodiment, a slide 241 is provided on the inner wall of the adjusting groove 24, and a guide 822 is connected to the moving member 82. The guide 822 is slidably disposed in the slide 241. Thus, when the adjusting member 81 moves downward, the guide 822 will slide along the slide 241 when the moving member 82 is subjected to the lateral pushing force of the adjusting member 81, thereby playing a guiding role and making the lateral movement of the moving member 82 more stable and reliable.

[0051] Please see Figure 1 and Figure 4 Specifically, the slide 241 extends, for example, to the top surface of the mounting plate 20. The top end of the guide member 822 extends out of the mounting plate 20 through the slide 241, and the top end of the guide member 822 is provided with anti-detachment protrusions 8221 on opposite sides, which slide in cooperation with the top surface. In this way, the anti-detachment protrusions 8221 play a vertical limiting role, preventing the guide member 822 from detaching from the slide 241, thus ensuring stable and reliable operation.

[0052] Please see Figure 1 , Figure 3 and Figure 4In one embodiment, the string welding machine further includes a lifting mechanism 91. The lifting mechanism 91 is connected to the mounting plate 20 and is used to drive the mounting plate 20 to move up and down, so that the mounting plate 20 drives the drive plate 40 and the pressure pins 30 to move up and down. Thus, in actual use, before the step of switching the electromagnet to the first working state, the mounting plate 20 and the worktable 10 are provided with a gap space in the vertical direction. This gap space, for example, facilitates the placement of the battery cell 50 on the top surface of the worktable 10. After confirming that the battery cell 50 is placed on the top surface of the worktable 10, the lifting mechanism 91 drives the mounting plate 20 to lower its position, for example, so that the bottom surface of the mounting plate 20 contacts the top surface of the worktable 10. As the mounting plate 20 lowers, it can drive the drive plate 40 and all the pressure pins 30 to lower their positions. After the bottom surface of the mounting plate 20 contacts the top surface of the worktable 10, the electromagnet is switched to the first working state, thereby realizing the grounding of each pressure pin 30 with the welding strip 60 on the battery cell 50. In addition, after the welding of the battery cell 50 is completed, the electromagnet is switched to the second working state to reset the drive plate 40 and each pressure pin 30 to the initial position. The lifting mechanism 91 is also controlled to move. The lifting mechanism 91 drives the mounting plate 20 to rise, so that the mounting plate 20 is reset. After the mounting plate 20 is raised, there is a gap space between it and the top surface of the worktable 10. This gap space can, for example, facilitate the removal of the battery cell 50 from the top surface of the worktable 10.

[0053] It should be noted that the lifting mechanism 91 in the above embodiments can be either a manually operated or electrically operated structure, specifically including but not limited to a screw drive mechanism, cylinder mechanism, sprocket drive mechanism, gear drive mechanism, or cam drive mechanism, etc., which can be flexibly adjusted and set according to actual needs, and are not limited here. In this embodiment, the lifting mechanism 91 is specifically taken as a screw drive mechanism for further explanation.

[0054] Please see Figure 1 , Figure 3 and Figure 4 In one embodiment, the lifting mechanism 91 includes a drive motor 911, a lead screw 912, and a guide rod 913. The string welding machine also includes a bracket 92 mounted on the mounting plate 20. The drive motor 911 is mounted on the bracket 92 and connected to the lead screw 912. The worktable 10 has a threaded hole that mates with the lead screw 912, through which the lead screw 912 passes. The worktable 10 also has a guide hole that mates with the guide rod 913, through which the guide rod 913 passes. When the drive motor 911 drives the lead screw 912 to rotate, under the guidance of the guide rod 913, the lead screw 912 can correspondingly drive the bracket 92 and the mounting plate 20 to move up and down, thereby adjusting the height of the mounting plate 20.

[0055] Please see Figures 1 to 3Specifically, the bracket 92 includes a support plate 921 and multiple support columns 922. Each support column 922 connects the support plate 921 to the mounting plate 20. In this way, the drive plate 40 and the multiple pressure pins 30 are located in the area between the support plate 921 and the mounting plate 20, making them less susceptible to contact by external objects and ensuring normal operation.

[0056] The support plate 921 has a protrusion 923 on its side. The drive motor 911 is mounted on the protrusion 923, so that the lead screw 912 is located on one side of the mounting plate 20, thereby avoiding the battery cell 50 on the top surface of the worktable 10.

[0057] In one embodiment, the top surface of the workbench 10 is formed with a placement groove 11 for placing the battery cell 50, specifically adapted to the battery cell 50. Thus, the battery cell 50 can be stably placed inside the placement groove 11, preventing displacement of the battery cell 50 during welding and thus avoiding misalignment of the welding point, thereby improving the welding quality of the solder strip 60.

[0058] In one embodiment, the string welding machine further includes a negative pressure mechanism 93. A negative pressure hole is provided on the inner wall of the placement groove 11, and the negative pressure mechanism 93 communicates with the negative pressure hole. Thus, during the welding of the welding strip 60, the negative pressure mechanism 93 is activated, generating a negative pressure adsorption effect at the negative pressure hole. This ensures that the battery cell 50 is stably placed inside the placement groove 11, preventing displacement of the battery cell 50 during welding and thus preventing the welding point from becoming misaligned, thereby improving the welding quality of the welding strip 60.

[0059] The number of negative pressure holes includes, but is not limited to, one or more, or multiple, such as two, three, four or other numbers. In this embodiment, multiple negative pressure holes are specifically provided, and are arranged, for example, evenly on the bottom wall of the placement groove 11.

[0060] Please see Figure 1 and Figure 3 In addition, the workbench 10 is also provided with a chamber 12. A negative pressure mechanism 93 is provided inside the chamber 12, for example. The negative pressure mechanism 93 is, for example, a suction pump. The suction end of the suction pump is connected to a plurality of suction pipes 94, and each suction pipe 94 is respectively connected to a negative pressure hole.

[0061] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A stringer, characterized by, The string welding machine comprises: a workbench (10) for placing a battery sheet (50); a mounting plate (20) having a plurality of through holes (21) formed thereon, each of the through holes (21) penetrating the mounting plate (20) along the thickness direction of the mounting plate (20); a plurality of pressing needles (30) movably penetrating the mounting plate (20) one by one in the plurality of through holes (21); and a driving plate (40) located above the mounting plate (20), all the pressing needles (30) being connected with the driving plate (40), the driving plate (40) and one of the mounting plate (20) being provided with an electromagnet, the driving plate (40) and the other of the mounting plate (20) being provided with a permanent magnet, when the electromagnet works in a first working state, the polarity of the electromagnet being opposite to that of the permanent magnet, the driving plate (40) driving all the pressing needles (30) to move towards the battery sheet (50) so that the pressing needles (30) abut against the solder strips (60) on the battery sheet (50).

2. The stringer machine of claim 1, wherein, When the electromagnet works in a second working state, the polarity of the electromagnet being the same as that of the permanent magnet, the driving plate (40) driving all the pressing needles (30) to move away from the battery sheet (50) so that the pressing needles (30) are separated from the solder strips (60) on the battery sheet (50).

3. The stringer welding machine of claim 2, wherein, The top end of each of the pressing needles (30) is connected with the driving plate (40), and the bottom end of each of the pressing needles (30) is provided with a limiting portion (31), when the electromagnet works in the second working state, the limiting portion (31) abutting against the bottom surface of the mounting plate (20).

4. The stringer welding machine of claim 1, wherein, All the through holes (21) are arranged in multiple columns on the mounting plate (20) in sequence, and each column of the through holes (21) is arranged in position corresponding to each of the solder strips (60) of the battery sheet (50).

5. The stringer machine of claim 4, wherein, The mounting plate (20) is internally provided with multiple sliding grooves (23) arranged in parallel and at intervals, each of the sliding grooves (23) being arranged in communication with each column of the through holes (21), the pressing needles (30) penetrating each column of the through holes (21) also penetrating the sliding grooves (23), and the string welding machine further comprises multiple sliding members (70), each of the sliding members (70) being arranged in the sliding groove (23) in position corresponding to the sliding groove (23) in an up-down slidable manner, and each of the sliding members (70) being connected with all the pressing needles (30) in the sliding groove (23) corresponding to the sliding member (70).

6. The stringer welding machine of claim 5, wherein, The mounting plate (20) is further internally provided with two adjusting grooves (24), the two adjusting grooves (24) being arranged at opposite ends of each of the sliding grooves (23) in a communication manner, respectively; The string welding machine further comprises two adjusting members (81), two moving members (82) and at least two elastic members (83); each adjusting member (81) is correspondingly arranged in each adjusting groove (24) in a slideable manner, and the opposite ends of each slide member (70) are connected with two adjusting members (81) respectively; two moving members (82) are arranged in two adjusting grooves (24) respectively, each moving member (82) is in abutting fit with each adjusting member (81), and the inside of each adjusting groove (24) is further provided with at least one elastic member (83), the elastic member (83) is located on the side of the moving member (82) away from the adjusting member (81), and each moving member (82) is connected with the inner wall of each adjusting groove (24) through at least one elastic member (83); when the adjusting member (81) moves towards the direction close to the battery piece (50), each adjusting member (81) can synchronously drive the corresponding moving member (82) to move along the transverse direction of the adjusting groove (24) and compress the elastic member (83).

7. The stringer welding machine of claim 6, wherein, The adjusting member (81) is provided with a first guide inclined surface (811) for abutting fit with the moving member (82), and / or the moving member (82) is provided with a second guide inclined surface (821) for abutting fit with the adjusting member (81); The inner wall of the adjusting groove (24) is provided with a slide (241), the moving member (82) is connected with a guide member (822), and the guide member (822) is arranged in the slide (241) in a slideable manner.

8. The stringer welding machine of claim 1, wherein, The string welding machine further comprises a lifting mechanism (91), the lifting mechanism (91) is connected with the mounting plate (20), and the lifting mechanism (91) is used for driving the mounting plate (20) to perform lifting action, so that the mounting plate (20) drives the driving plate (40) and the pressing needle (30) to perform lifting movement.

9. The stringer welding machine of claim 1, wherein, The top surface of the workbench (10) is formed with a placing groove (11), and the placing groove (11) is used for placing the battery piece (50).

10. The stringer welding machine of claim 9, wherein, The string welding machine further comprises a negative pressure mechanism (93), and the inner wall of the placing groove (11) is provided with a negative pressure hole, and the negative pressure mechanism (93) communicates with the negative pressure hole. The top surface of the workbench (10) is formed with a placing groove (11), and the placing groove (11) is used for placing the battery piece (50).

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