A press web and solder strip gripping device

Abstract

The utility model relates to the field of BC battery manufacturing, concretely is a press net and welding band grabbing device. Including fixed plate and the press net of being located below it, first electromagnet sets up in the fixed plate bottom for adsorbing press net, fixed jaw sets up on the fixed plate, and sets up along the welding band extension direction, sliding jaw sets up in one side of fixed jaw, and can move along the perpendicular direction of welding band extension, sliding jaw and fixed jaw all pass through press net for grabbing welding band. Set up first electromagnet, sliding jaw and fixed jaw combination, realize the simultaneous grabbing of press net and welding band. Wherein first electromagnet electrification carries out adsorption and grabs press net, and sliding jaw and fixed jaw pass through press net simultaneously to press net below, will the welding band and be stuck on fixed jaw, sliding jaw moves to the below of welding band, realizes the grabbing of welding band finally.

Description

Technical Field

[0001] This utility model relates to the field of BC battery manufacturing, specifically a wire mesh pressing and welding strip gripping device. Background Technology

[0002] BC battery strings (back-contact battery strings) have higher efficiency due to their grid-free structure on the light-facing side, allowing them to fully utilize sunlight. In the production of BC cells, several cells need to be connected in series. A solder ribbon contacts the cell, and after heating, the two adhere together. Several cells are connected in series via the solder ribbon to form a battery string. The solder ribbon is laid on top of the cells. To ensure better contact between the solder ribbon and the cells and improve the welding effect, a pressure mesh is placed on top of the solder ribbon. Pressure pins are positioned on the pressure mesh to press the solder ribbon firmly against the cells. The weight of the pressure mesh ensures a tight bond between the solder ribbon and the cells, allowing them to better bond together after heating and preventing poor welding conditions such as incomplete soldering.

[0003] To ensure the pressure mesh is accurately pressed onto the welding strip, the welding strip and pressure mesh need to be positioned relative to each other during gripping, allowing them to be placed onto the battery in one go. What is needed is a device that can simultaneously grip the welding strip and pressure mesh, placing them together onto the battery to be welded. Utility Model Content

[0004] To address the problems in the prior art, this application provides a device for gripping both the wire mesh and the welding strip, thereby enabling simultaneous gripping of the wire mesh and the welding strip.

[0005] The technical solution is as follows: A wire mesh pressing and welding strip gripping device includes a fixed plate and a wire mesh located below it. A first electromagnet is disposed at the bottom of the fixed plate to attract the wire mesh. A fixed gripper is disposed on the fixed plate and is arranged along the extension direction of the welding strip. A sliding gripper is disposed on one side of the fixed gripper and can move along the vertical direction of the extension of the welding strip. Both the sliding gripper and the fixed gripper pass through the wire mesh to grip the welding strip.

[0006] Specifically, the fixing claw includes a mounting block installed on the bottom of the fixing plate, and an extension rod is provided on the bottom of the mounting block corresponding to the number of welding strips, and a limit groove is provided on the bottom of the extension rod corresponding to the width of the welding strips.

[0007] Specifically, the sliding gripper includes a sliding connecting plate, which is connected to the fixed plate by a slider and a slide rail. A sliding block is provided at the bottom of the sliding connecting plate, and a sliding rod is provided at the bottom of the sliding block corresponding to the number of welding strips. A limit hook is provided at the bottom of the sliding rod, and the limit hook covers the bottom of the fixed gripper.

[0008] Specifically, the pressure mesh is provided with through holes for the sliding gripper and the fixed gripper to pass through, and a second electromagnet is provided on the pressure mesh along the direction of the welding strip, the second electromagnet attracting the welding strip.

[0009] Preferably, the mounting blocks are respectively disposed at both ends of the welding strip.

[0010] Preferably, the mounting blocks are respectively disposed at the head, middle and tail of the welding strip.

[0011] Preferably, the distance between the upper surface of the limiting hook and the bottom surface of the fixing claw is 0-1.5mm.

[0012] Preferably, the bottom surface of the first electromagnet is located above the bottom surface of the sliding gripper.

[0013] Preferably, the second electromagnet has an inverted trapezoidal cross-section, the bottom surface of which contacts the welding strip, and the ratio of the length of the bottom surface of the inverted trapezoid to the width of the welding strip is between 0.5 and 1.

[0014] Preferably, it further includes a connecting seat, which connects to a plurality of the sliding connecting plates, and the connecting seat is connected to a lead screw drive device, which drives the connecting seat to move.

[0015] In summary, by combining a first electromagnet, a sliding gripper, and a fixed gripper, the simultaneous gripping of the pressure mesh and the welding strip is achieved. The first electromagnet, when energized, attracts and grips the pressure mesh. The sliding and fixed grippers simultaneously pass under the pressure mesh, securing the welding strip to the fixed gripper. The sliding gripper then moves to a position below the welding strip, ultimately achieving the gripping of the welding strip.

[0016] Furthermore, the fixed gripper includes an extension rod, and the bottom of the extension rod has a limiting groove to accommodate the welding strip, allowing the welding strip to be locked within the limiting groove and thus limiting and fixing it. The movable gripper includes a sliding rod, and the sliding rod is equipped with a limiting hook. When the limiting hook moves below the limiting groove, if the welding strip falls out of the limiting groove, it will fall onto the limiting hook instead of falling into the gripping device of this application. The combination of the two provides double protection, improving the overall stability and safety during operation.

[0017] Furthermore, a second electromagnet is installed at the bottom of the pressure mesh. The second electromagnet will attract the welding strip and fix it again to prevent the welding strip from shifting when it moves, thus further ensuring the relative position between the welding strip and the pressure mesh. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of part of this utility model; Figure 4 This is a schematic diagram of the structure of the mesh pressing, sliding gripper and fixed gripper of this utility model. Figure 5 This is a schematic diagram of the sliding gripper and fixed gripper of this utility model; Figure 6 for Figure 5 Enlarged schematic diagram of part A in the middle.

[0019] Reference numerals in the attached drawings: 1. Fixing plate; 2. Pressure mesh; 201. Through hole; 202. Second electromagnet; 3. First electromagnet; 4. Sliding gripper; 401. Sliding connecting plate; 402. Sliding block; 403. Sliding rod; 404. Limiting hook; 5. Fixing gripper; 501. Mounting block; 502. Extension rod; 503. Limiting groove; 6. Welding strip; 7. Slider; 8. Slide rail; 9. Connecting plate. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. Example

[0021] As shown in the figure, the device includes a fixed plate 1. A first electromagnet 3 is installed at the bottom of the fixed plate 1. The first electromagnet 3 can attract the pressure mesh 2 below. The first electromagnet 3 is located at both ends of the pressure mesh 2, attracting both ends of the pressure mesh 2 to grasp it. Fixed grippers 5 are installed on the fixed plate 1. The fixed grippers 5 are arranged along the extension direction of the welding strip 6, that is, along the length of the welding strip 6 itself. A sliding gripper 4 is installed on one side of the fixed gripper 5 and can move along the vertical direction of the extension of the welding strip 6, that is, it can move between the spaced welding strips 6, moving away from and closer to the welding strip 6. Both the sliding gripper 4 and the fixed gripper 5 pass through the pressure mesh 2 to grasp the welding strip 6.

[0022] When handling the pressure mesh 2 and welding strip 6, the fixing plate 1 is mounted on a driving device, which can be a robotic arm or a linear module. The robotic arm selection depends on the requirements; for example, a three-axis, four-axis, five-axis, or six-axis robotic arm can be chosen. Similarly, the linear module selection also depends on the requirements; for example, it can be selected to achieve movement in the X and Z axes, or movement in the Y and Z axes. The pressure mesh 2 presses onto the welding strip 6 and is conveyed by a stepping conveyor belt. The driving device moves the fixing plate 1 above the pressure mesh 2, and then controls the fixing plate 1 to descend. Since the pressure mesh 2 is made of metal, the first electromagnet 3, when energized, can attract the pressure mesh 2. The fixed gripper 5 and the sliding gripper 4 pass through the pressure mesh 2 and grasp the welding strip 6 below it. This achieves simultaneous grasping of the pressure mesh 2 and the welding strip 6. Finally, the driving device moves the fixing plate 1 to the designated workstation.

[0023] As shown in the figure, the fixed gripper 5 includes a mounting block 501, which is installed at the bottom of the fixed plate 1. Several extension rods 502 are provided at the bottom of the mounting block 501. The number of extension rods 502 is determined by the number of welding strips 6. When a pressure mesh 2 presses down on 19 welding strips 6, at least 19 extension rods 502 are required, meaning each welding strip corresponds to at least one extension rod 502. A limiting groove 503 is formed at the bottom of each extension rod 502. The width of the limiting groove 503 is determined by the width of the welding strip 6, allowing the welding strip 6 to be secured within the limiting groove 503. When the fixed gripper 5 descends, the extension rods 502 pass through the pressure mesh 2, ensuring the welding strip 6 is precisely secured within the limiting groove 503. The left and right sidewalls of the limiting groove 503 constrain the welding strip 6 in the left and right directions. The shaking generated during the overall movement of the gripping device prevents the welding strip 6 from shifting, improving overall accuracy.

[0024] As shown in the figure, the sliding gripper 4 includes a sliding connecting plate 401. A slider 7 is installed at the bottom of the sliding connecting plate 401, and a corresponding slide rail 8 is provided on the fixed plate 1. The slide rail 8 is installed perpendicular to the direction of extension of the welding strip 6. The slider 7 is connected to the slide rail 8, so that the sliding connecting plate 401 can be installed on the fixed plate 1 and can move along the slide rail 8 on the fixed plate 1. A sliding block 402 is provided at the bottom of the sliding connecting plate 401, and a number of sliding rods 403 are provided at the bottom of the sliding block 402. The number of sliding rods 403 is set according to the number of welding strips 6. When a pressure mesh 2 presses 19 welding strips 6, at least 19 sliding rods 403 are provided, that is, each welding strip corresponds to at least one sliding rod 403. Generally, the number of sliding rods 403 is the same as the number of extension rods 502. A limit hook 404 is provided at the bottom of the sliding rod 403, and the limit hook 404 can cover the bottom of the extension rod 502. When the drive device lowers the fixed plate 1, the initial position of the limiting hook 404 is not below the welding strip 6, but to one side of the extension rod 502. When the sliding gripper 4 lowers, the sliding rod 403 passes through the pressure mesh 2. After the welding strip 6 is stuck in the limiting groove 503, the sliding connecting plate 401 moves along the slide rail 8, driving the connected sliding block 402 to move. Finally, the limiting hook 404 at the bottom of the sliding rod 403 moves to the bottom of the limiting groove 503, supporting the welding strip 6 in the limiting groove 503. During the overall movement, when the speed or amplitude of movement is large, there is a risk that the welding strip 6 will detach from the limiting groove 503. The supporting effect of the limiting hook 404 ensures that the welding strip 6 remains within the limiting groove 503, preventing it from detaching and maintaining its position. This ensures that the relative position of the welding strip 6 and the pressure mesh 2 remains unchanged when gripped.

[0025] As shown in the figure, a through hole 201 is provided on the pressure mesh 2. The through hole 201 is located below the sliding gripper 4 and the fixed gripper 5, so that the sliding rod 403 and the extension rod 502 can pass through the pressure mesh 2 through the through hole 201. A second electromagnet 202 is provided at the bottom of the pressure mesh 2. The second electromagnets 202 are distributed in the direction of the extension of the welding strip 6. Usually, one welding strip 6 is attracted by 6-8 second electromagnets 202. The attraction of the second electromagnets 202 further ensures that the welding strip 6 can maintain its relative position when moving.

[0026] It should be noted that a moving groove is also provided on the pressing net 2. The moving groove is provided according to the direction of movement of the sliding rod 403, so that the sliding rod 403 will not interfere with the pressing net 2 when it moves.

[0027] It should be noted that the cross-sectional shape of the second electromagnet 202 is an inverted trapezoid, meaning that the length of the base gradually increases from bottom to top. Its base contacts the surface of the welding strip 6. As the second electromagnet 202 descends, its base presses against the surface of the welding strip 6, acting as a pressure pin and providing initial fixation for the welding strip 6. Furthermore, the ratio of the length of the base to the width of the welding strip 6 is between 0.5 and 1. That is, when the width of the welding strip is 10mm, the length of the base of the second electromagnet 202 can be 5mm, 7.5mm, or 10mm. Typically, a base length of 5mm is chosen to ensure sufficient pressure on the welding strip 6 while also reducing the weight of the second electromagnet 202.

[0028] In this embodiment, the distance between the upper surface of the limiting hook 404 and the fixed gripper 5 is 0-1.5mm, that is, the distance between the upper surface of the limiting hook 404 and the bottom surface of the extension rod 502 in the fixed gripper 5 is set between 0-1.5mm, and can be 0mm, 1mm, or 1.5mm.

[0029] It should be noted that the solder strip 6 will be stuck inside the limiting groove 503 and will not protrude outside the limiting groove 503.

[0030] Therefore, the distance between the upper surface of the limiting hook 404 and the bottom surface of the extension rod 502 in the fixed gripper 5 can be set to 0mm. When the limiting hook 404 moves to the bottom of the extension rod 502, the upper surface of the limiting hook 404 will fit against the bottom surface of the extension rod 502 without affecting the welding strip 6.

[0031] In this embodiment, the distance between the upper surface of the limiting hook 404 and the bottom surface of the extension rod 502 in the fixed gripper 5 can be set to 1mm. Compared to the 0mm case, the limiting hook 404 moves for a long time and repeatedly contacts and rubs against the bottom of the extension rod 502, affecting the movement of the limiting hook 404. At the same time, friction will generate debris, which will contaminate subsequent processes and affect them. On the other hand, the 1.5mm case is too long. When the welding strip 6 falls down, it will fall through the gap and cannot effectively support the welding strip 6.

[0032] As shown in the figure, the bottom surface of the first electromagnet 3 is located above the bottom surface of the sliding gripper 4, and the limiting hook 404 of the sliding gripper 4 is located above the bottom surface of the extension rod 502 in the fixed gripper 5. Therefore, the bottom surface of the first electromagnet 3 is simultaneously located above both the sliding gripper 4 and the fixed gripper 5. Consequently, when the fixed plate 1 moves up and down, the limiting hook 404 and the extension rod 502 will first pass through the through hole 201 on the pressure mesh 2, and then the first electromagnet 3 will attract the pressure mesh 2. Example

[0033] Compared to Example 1, the distinguishing feature is that the mounting blocks 501 are located at both ends of the welding strip 6. Specifically, one welding strip 6 corresponds to two mounting blocks 501, meaning there are two mounting blocks 501, fixed to the fixing plate 1 at both ends of the welding strip 6. Similarly, two extension rods 502 are also correspondingly provided, and the limiting grooves 503 are respectively engaged at both ends of the welding strip 6. Since the number of sliding claws 4 corresponds to the number of fixed claws 5, the number of sliding connecting plates 401 is also set to two, corresponding to one side of the mounting blocks 501. The number of sliding rods 403 is also set to two, so that the limiting hooks 404 correspond to each limiting groove 503.

[0034] It should be noted that in order to enable the sliding connecting plate 401 to move uniformly, the sliding connecting plate 401 is connected by the connecting seat 9, and the connecting seat 9 is connected to the lead screw device.

[0035] The lead screw mechanism here uses an electric lead screw, which is an electrically driven device that converts the rotary motion of an electric motor into the linear reciprocating motion of a push rod. Its working principle is that the electric motor, after being reduced in speed by gears, drives a pair of lead screw nuts. This converts the motor's rotary motion into linear motion, and the forward and reverse rotation of the motor completes the push rod action. Complex actions such as rotation and rocking can be accomplished through various levers, rockers, or linkages. By changing the lever arm length, the stroke can be increased or decreased. An encoder can also be installed to detect the number of pulses from the motor, thereby controlling the push rod motor to move inching or intermittently. A potentiometer is used to detect the resistance, reflecting the push rod's stroke position, ultimately allowing the push rod to stop at any point in its stroke.

[0036] The direction of nut movement on the lead screw assembly is set according to the direction of slide rail 8, ensuring that the movement directions of the two are consistent. This allows the lead screw assembly to drive the connecting seat 9 to move, thereby enabling all the limit hooks 404 to move simultaneously to below the limit groove 503. Example

[0037] Compared to Example 1, the distinguishing feature is that the mounting blocks 501 are located at the head, middle, and tail of the welding strip 6. Specifically, one welding strip 6 corresponds to three mounting blocks 501, that is, there are three mounting blocks 501, which are fixed on the fixing plate 1 at the head, middle, and tail of the welding strip 6. Similarly, three extension rods 502 are also correspondingly provided, and the limiting grooves 503 are respectively engaged at the head, middle, and tail of the welding strip 6. Since the number of sliding claws 4 is set to correspond to the number of fixed claws 5, the number of sliding connecting plates 401 is also set to three and correspondingly located on one side of the mounting blocks 501. The number of sliding rods 403 is also set to three, so that the limiting hooks 404 correspond to each limiting groove 503.

[0038] It should be noted that, in order to enable the sliding connecting plate 401 to move uniformly, the sliding connecting plate 401 is connected via a connecting seat 9, which is connected to the lead screw device. The direction of movement of the nut on the lead screw device is set according to the direction of the slide rail 8, so that the movement directions of the two are consistent. This allows the lead screw device to drive the connecting seat 9 to move, thereby enabling all the limit hooks 404 to move simultaneously to below the limit groove 503.

[0039] In practical use, since multiple sets of welding strip 6 and mesh 2 need to be transported at once, multiple sets of sliding grippers 4 and fixed grippers 5 need to be set up accordingly. The specific usage process is as follows: The fixed plate 1 is installed on the linear module, which can move horizontally and vertically. The fixed plate 1 moves horizontally to directly above the mesh 2, and then the fixed plate 1 descends vertically. The first electromagnet 3 contacts the upper surface of the mesh 2 and is energized to attract it. At this time, the extension rod 502 and the sliding rod 403 pass through the mesh 2, so that the welding strip 6 is stuck in the limiting groove 503. Then the screw device controls the connecting seat 9 to move, so that the sliding rod 403 moves along the direction of the slide rail 8, so that the limiting hook 404 moves to the bottom of the limiting groove 503 to support the welding strip 6 in the limiting groove 503. At the same time, the second electromagnet 202 is energized to attract the welding strip 6. At this point, the simultaneous gripping of the pressure mesh 2 and the welding strip 6 is completed. The linear module controls the fixed plate 1 to rise and move horizontally to the top of the next work station. Then, it controls the fixed plate 1 to descend to the designated position. The sliding rod 403 moves, causing the limit hook 404 to move to one side of the welding strip 6. Then, the first electromagnet 3 and the second electromagnet 202 are de-energized, releasing the gripping of the pressure mesh 2 and the welding strip 6. Finally, the linear module controls the fixed plate 1 to rise to the initial position. Repeating the above operation can complete the simultaneous gripping of the pressure mesh 2 and the welding strip 6.

[0040] Other embodiments of the present invention will readily conceive of by those skilled in the art upon consideration of the specification and practice of the specific embodiments described herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not described herein. Furthermore, there may be minor differences in the wording of the names of certain components in different embodiments; these minor differences will not affect the understanding of the present invention by those skilled in the art.

Claims

1. A wire mesh pressing and welding strip gripping device, comprising a fixing plate (1) and a wire mesh (2) located below it, characterized in that, The first electromagnet (3) is set at the bottom of the fixed plate (1) to attract the pressure mesh (2); the fixed claw (5) is set on the fixed plate (1) and is set along the extension direction of the welding strip (6); the sliding claw (4) is set on one side of the fixed claw (5) and can move along the vertical direction of the extension of the welding strip (6); both the sliding claw (4) and the fixed claw (5) pass through the pressure mesh (2) to grab the welding strip (6).

2. The wire mesh pressing and welding strip gripping device according to claim 1, characterized in that, The fixed gripper (5) includes a mounting block (501) installed at the bottom of the fixed plate (1). The bottom of the mounting block (501) is provided with an extension rod (502) corresponding to the number of the welding strips (6). The bottom of the extension rod (502) is provided with a limiting groove (503) corresponding to the width of the welding strips (6).

3. The wire mesh pressing and welding strip gripping device according to claim 1, characterized in that, The sliding gripper (4) includes a sliding connecting plate (401), which is connected to the fixed plate (1) by a slider (7) and a slide rail (8). A sliding block (402) is provided at the bottom of the sliding connecting plate (401), and a sliding rod (403) is provided at the bottom of the sliding block (402) corresponding to the number of welding strips (6). A limit hook (404) is provided at the bottom of the sliding rod (403), and the limit hook (404) covers the bottom of the fixed gripper (5).

4. The wire mesh pressing and welding strip gripping device according to claim 1, characterized in that, The pressure mesh (2) is provided with a through hole (201) through which the sliding gripper (4) and the fixed gripper (5) pass. A second electromagnet (202) is provided on the pressure mesh (2) along the direction of the extension of the welding strip (6). The second electromagnet (202) attracts the welding strip (6).

5. The wire mesh pressing and welding strip gripping device according to claim 2, characterized in that, The mounting blocks (501) are respectively disposed at both ends of the welding strip (6).

6. The wire mesh pressing and welding strip gripping device according to claim 2, characterized in that, The mounting blocks (501) are respectively disposed at the head, middle and tail of the welding strip (6).

7. The wire mesh pressing and welding strip gripping device according to claim 3, characterized in that, The distance between the upper surface of the limiting hook (404) and the bottom surface of the fixing claw (5) is 0-1.5mm.

8. The wire mesh pressing and welding strip gripping device according to claim 1, characterized in that, The bottom surface of the first electromagnet (3) is located above the bottom surface of the sliding gripper (4).

9. The wire mesh pressing and welding strip gripping device according to claim 4, characterized in that, The second electromagnet (202) has an inverted trapezoidal cross section, and the bottom surface of the inverted trapezoid contacts the welding strip (6). The ratio of the length of the bottom surface of the inverted trapezoid to the width of the welding strip (6) is between 0.5 and 1.

10. The wire mesh pressing and welding strip gripping device according to claim 3, characterized in that, It also includes a connecting seat (9), which connects to a plurality of the sliding connecting plates (401), and the connecting seat (9) is connected to a lead screw drive device, which drives the connecting seat (9) to move.

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