A bending mechanism and stringing device

Abstract

This utility model discloses a bending mechanism and a stringing device, relating to the field of battery string production technology. It includes: a pressing member, a bending section, and a driving mechanism driven by the bending section. The bending section includes a connector hinged to the pressing member and a gripping component slidably connected to the connector via a guide member. The gripping component is located at the front end of the pressing member and is used to grip the front end of the battery cell. The driving end of the driving mechanism is driven by the connector, driving the front end of the battery cell gripped by the gripping component to rotate upwards by a preset angle relative to the bottom of the pressing member. While bending the battery cell, the gripping component moves a preset distance in the direction of the sliding connection with the guide member, releasing the stress caused by the bending deformation of the battery cell, reducing local stress concentration during the bending process and thus reducing damage to the battery cell, thereby improving the quality of the battery cells during battery string laying.

Description

Technical Field

[0001] This utility model relates to the field of battery string production technology, and in particular to a bending mechanism and string laying device. Background Technology

[0002] In the manufacturing process of a back-contact battery string, the solder ribbon is located on the lower surface of the battery cell, with its end recessed into the cell surface. During cell placement, the solder ribbon end is clamped and fixed. Only after the battery cell is positioned on the solder ribbon can the solder ribbon end be released. Therefore, when placing the battery cell on the solder ribbon, the portion of the battery cell corresponding to the solder ribbon end is bent. The space between the bent battery cell and the solder ribbon accommodates the clamps holding the solder ribbon end. The unbent portion of the battery cell presses down on the solder ribbon portion below to fix it in place. The clamps then release the solder ribbon, restoring the bent portion of the battery cell to a flat state. Existing battery cell bending mechanisms directly grip the front end of the battery cell and bend it at the pressure point. The tension after the gripping area changes position cannot be released, leading to the battery cell being dragged by the gripping component or breaking at stress concentration points. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bending mechanism and a strip laying device, which can clamp both ends of the welding strip and stretch the welding strip during the transfer and laying process, so that the prepared welding strip is straightened and does not bend.

[0004] This application discloses a bending mechanism, comprising: a mounting base, a pressing member, a bending portion, and a driving mechanism drivenly connected to the bending portion. The pressing member is connected to the driving mechanism on the mounting base. The bending portion includes a connector hinged to the pressing member and a gripping assembly slidably connected to the connector via a guide member. The gripping assembly is located at the front end of the pressing member and is used to grip the front end of a battery cell. The driving end of the driving mechanism is drivenly connected to the connector and is used to drive the front end of the battery cell gripped by the gripping assembly to rotate upwards by a preset angle relative to the bottom of the pressing member.

[0005] Optionally, it also includes a mounting base connected to the pressing member, the driving mechanism being a cylinder, the output end of the cylinder being connected to the connecting member, and the cylinder body being rotatably connected to the mounting base via a swing seat.

[0006] Optionally, the connector includes a mounting plate hinged to the pressing member and a drive plate hinged to the mounting plate. The drive plate is connected to the drive end of the drive mechanism. The guide includes a guide rod slidably disposed on the mounting plate and a spring sleeved on the guide rod. The front end of the guide rod is connected to the gripping assembly, and the spring is disposed between the gripping assembly and the mounting plate.

[0007] Optionally, the gripping component includes a plurality of linearly arranged suction cups that adsorb the battery cell at the front end of the pressing member.

[0008] Optionally, a limiting pad is provided on the opposite side of the pressing member or the mounting plate.

[0009] Optionally, the bottom surface of the pressing member is provided with a cushioning pad.

[0010] Optionally, the bottom of the pressing member has an upwardly curved arc segment on the side opposite to the gripping assembly.

[0011] This application also proposes a stringing device using any of the above-mentioned bending mechanisms, further comprising a first adsorption component and a second adsorption component disposed on the mounting base. The first adsorption component is disposed on both sides of the width of the second adsorption component and is vertically connected to the mounting base via a lifting component. The first adsorption component is used to grip the stringing fixture. The second adsorption component is disposed at the rear end of the pressing member and is used to grip the rear end of the battery cell located below the stringing fixture. The gripping component is disposed at the front end of the second adsorption component and is used to grip the front end of the battery cell. The pressing member is disposed between the gripping component and the second adsorption component. The stringing fixture is provided with a channel for the pressing member and the gripping component to pass through.

[0012] Optionally, it also includes a movable drive component connected to the mounting base, the movable drive component including at least two linear drive components driven in a vertical direction for driving the bending mechanism to transfer the battery cells and stringing fixture to a continuous battery string that is combined with the welding strip.

[0013] The technical solution provided by this utility model involves pressing down on the bent root of the battery cell with a pressing member, and connecting the gripping component and the connecting member to the bottom end of the pressing member via a hinge. The gripping component and the connecting member are also slidably connected. When the driving mechanism drives the connecting member to rotate along the bottom end of the pressing member, it simultaneously causes the gripping component to grip the battery cell at the front end of the pressing member and bend it upwards at a preset angle. While bending the battery cell upwards, the gripping component can also retract a preset distance from the pressing member. The preset retraction distance is the distance the gripping component has traveled after the battery cell is bent upwards. The gripping component can move horizontally according to the degree of bending of the solar cell, reducing the pulling force on the solar cell caused by the change in the gripping position. This prevents damage to the solar cell caused by the reaction force of the gripping position change, and also avoids the change in the position of the solar cell on the pressing side caused by the upward bending force of the gripping component. This improves the positional accuracy of the solar cell and the welding ribbon, and further enhances the quality of the solar cell string preparation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a bending mechanism proposed in this utility model;

[0016] Figure 2 This is a front view schematic diagram of the bending mechanism proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the stringing device proposed in this utility model.

[0018] The attached figures are labeled as follows:

[0019] 1. Pressing component; 2. Bending section; 21. Gripping assembly; 211. Suction cup; 22. Connecting component; 221. Mounting plate; 222. Drive plate; 231. Guide rod; 232. Spring; 3. Drive mechanism; 4. Mounting base;

[0020] 5. Swinging seat; 6. Limiting pad; 7. Buffer pad; 8. Second adsorption assembly; 9. First adsorption assembly;

[0021] 10. Pressing fixture; 11. Lifting assembly. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 , Figure 2As shown, a bending mechanism includes: a mounting base 4, a pressing member 1, a bending part 2, and a driving mechanism 3 drivenly connected to the bending part 2. The pressing member 1 is connected to the driving mechanism 3 on the mounting base 4. The bending part 2 includes a connecting member 22 hinged to the pressing member 1 and a gripping assembly 21 connected to the connecting member 22. The gripping assembly 21 is located at the front end of the pressing member 1 and is used to grip the front end of a battery cell. The driving end of the driving mechanism 3 is drivenly connected to the connecting member 22 and is used to drive the front end of the battery cell gripped by the gripping assembly 21 to rotate relative to the bottom of the pressing member 1 by a preset angle.

[0025] For example, when a battery cell is used in the laying of a back-contact battery string, the solder ribbon is located on the lower surface of the battery cell. The end of the solder ribbon on the lower surface does not extend beyond the edge of the battery cell. Before the battery cell and the solder ribbon are positioned together, the end of the solder ribbon and the bent portion of the battery cell are released, and the solder ribbon is pressed onto the lower surface of the battery cell.

[0026] Specifically, in the bending mechanism, the pressing member 1 presses against the root of the bent battery cell, and the gripping component 21 grips the surface of the battery cell at the front end of the pressing member 1. After the pressing member 1 is pressed, the driving mechanism 3 drives the connecting member 22 to rotate around the hinge point with the pressing member 1 by a preset angle, so as to drive the gripping component 21 connected to the connecting member 22 to grip the front end of the battery cell and bend it upward. The battery cell on the side of the pressing member 1 away from the gripping component 21 is flatly pressed against the surface of the welding strip. While the gripping component 21 folds upward, it also retracts backward by a preset distance to compensate for the change in horizontal position after the fixed position of the gripping component 21 grips the battery cell and bends upward. The preset distance moves towards the pressing member 1 while the arc of the battery cell gripping position moves. The gripping component 21 can move horizontally to follow the changes in the degree of bending of the battery cell, reducing the pulling force on the battery cell caused by the change in the gripping position of the gripping component 21, preventing damage to the battery cell caused by the reaction force of the change in gripping position, and avoiding the change in the position of the battery cell on the side of the pressing member 1 caused by the force of the gripping component 21 pulling the battery cell upward. This improves the positional accuracy of the battery cell and the welding strip, and further improves the quality of battery string preparation.

[0027] In some embodiments, the drive mechanism 3 is driven by a cylinder. The output end of the cylinder is connected to the connector 22. The cylinder body is connected to the mounting base 4 through the swing seat 5. When the cylinder drives the connector 22 to move, the gripping component 21 rotates upward around the pressing member 1. The cylinder body follows the swing of the connector 22, which can release the radial force after the gripping component 21 rotates and bends, so that the bent part of the battery cell is not subjected to additional directional force, thus ensuring the quality and accuracy of the battery cell bending.

[0028] It should be noted that the drive mechanism 3 can also be driven by a linear slide or a motor, and the drive end of the drive mechanism 3 can also be connected to the connector through snap-fit, strip hole, or other means to replace the drive mechanism 1 rotating through the swing seat 5.

[0029] Specifically, the connector 22 includes a mounting plate 221 hinged to the pressing member 1 and a drive plate 222 hinged to the mounting plate 221. The drive plate 222 is connected to the drive end of the drive mechanism 3. The guide includes a guide rod 231 slidably disposed on the mounting plate 221 and a spring 232 sleeved on the guide rod 231. The front end of the guide rod 231 is connected to the gripping assembly 21. The spring 232 is disposed between the gripping assembly 21 and the mounting plate 221. After the drive mechanism 3 drives the gripping assembly 21 to rotate and flip to release the battery cell, the spring 232 has the function of restoring the gripping assembly 21 to its initial position.

[0030] In some embodiments, the gripping component 21 includes a plurality of linearly arranged suction cups 211. The suction cups 211 adsorb the battery cell at the front end of the pressing member 1. While the driving mechanism 3 drives the connecting member 22 to rotate around the pressing member 1, the front end of the battery cell adsorbed by the suction cups 211 bends upward.

[0031] In some embodiments, a limiting pad 6 is provided on the opposite side of the pressing member 1 or the mounting plate 221. The mounting plate 221 is hinged to the pressing member 1. When the mounting plate 221 rotates, it moves closer to or away from the pressing member 1. When it moves closer to the pressing member 1, the mounting plate 221 is limited by the pressing member 1.

[0032] Specifically, the bottom surface of the pressing member 1, that is, the surface on which the pressing member 1 presses against the surface of the battery cell, is also provided with a buffer pad 7. The buffer pad 7 can be a material with a certain elastic deformation, such as rubber, silicone, or sponge, which flexibly contacts the surface of the battery cell to reduce the pressing rigidity of the pressing member 1 in contact with the battery cell.

[0033] In addition, an upward-curving arc segment is provided on the bottom of the pressing member 1 on the side opposite to the gripping component 21. This arc segment adapts to the curvature of the battery cell when it is bent by the gripping component 21, protecting the battery cell from the influence of local stress when it is pressed and bent, and avoiding the situation where the battery cell breaks due to stress concentration during bending.

[0034] On the other hand, such as Figure 3As shown, this application also proposes a stringing device, including any of the bending mechanisms mentioned above. The stringing device further includes a first adsorption component 9 and a second adsorption component 8 disposed on the mounting base 4. The first adsorption component 9 is disposed on both sides of the width of the second adsorption component 8 and is vertically connected to the mounting base 4 via a lifting component 11. The first adsorption component 9 is used to grip the stringing fixture 10. The second adsorption component 8 is disposed at the rear end of the pressing member 1 and is used to grip the rear end of the battery cell located below the stringing fixture 10. The gripping component 21 is disposed at the front end of the second adsorption component 8 and is used to grip the front end of the battery cell. The pressing member 1 is disposed between the gripping component 21 and the second adsorption component 8. The stringing fixture 10 is provided with a channel for the pressing member 1 and the gripping component 21 to pass through.

[0035] During battery string laying, the first adsorption component 9 and the second adsorption component 8 in the string laying device adsorb the pressing fixture 10 and the battery cells located below the pressing fixture 10, respectively. The gripping component 21 is located at the front end of the second adsorption component 8 and is used to grip the long side of the front end of the battery cell. The pressing fixture 10 is provided with a channel for the gripping component 21 and the pressing component 1 to pass through, so that the gripping component 21 and the pressing component 1 both pass through the pressing fixture 10 and contact the surface of the battery cell. During the process of being gripped and transported by the string laying device, the lifting component 11 controls the bottom surface of the pressing fixture 10 to be aligned with the surface of the battery cell. A gap is left on the upper surface of the battery cell. Before the stringing device lays the bottom of the battery cell on the surface of the welding strip, the gripping component 21 bends the front end of the battery cell to a preset arc. When the battery cell of the pressing component 1 and the second adsorption component 8 comes into contact with the surface of the welding strip, the structure controlling the welding strip releases the end of the welding strip and withdraws it from the bending area of ​​the battery cell. Then, the gripping component 21 releases the front end of the battery cell. After the front end of the battery cell covers the end of the controlled battery cell, the lifting component 11 releases the stringing fixture on the surface of the battery cell and transports it to the battery string welding station for electrical connection.

[0036] The stringing device also includes a movable drive component connected to the mounting base 4. The movable drive component includes at least two vertically connected linear drive components for driving the stringing device to transfer the battery cells and the stringing fixture 10 to be laid into a continuous battery string in conjunction with the welding strip.

[0037] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A bending mechanism, characterized in that, include: The mounting base (4), the pressing member (1), the bending part (2), and the driving mechanism (3) drivenly connected to the bending part (2) are all connected to the mounting base (4). The pressing member (1) and the driving mechanism (3) are connected to the mounting base (4). The bending part (2) includes a connector (22) hinged to the pressing member (1) and a gripping component (21) slidably connected to the connector (22) via a guide. The gripping component (21) is located at the front end of the pressing member (1) and is used to grip the front end of the battery cell. The driving end of the driving mechanism (3) is drivenly connected to the connector (22) and is used to drive the front end of the battery cell gripped by the gripping component (21) to rotate upwards by a preset angle relative to the bottom of the pressing member (1).

2. The folding mechanism of claim 1, wherein The driving mechanism (3) is a cylinder, the output end of the cylinder is connected to the connector (22), and the cylinder body is rotatably connected to the mounting base (4) through the swing seat (5).

3. The bending mechanism according to claim 1, wherein The connector (22) includes a mounting plate (221) hinged to the pressing member (1) and a drive plate (222) hinged to the mounting plate (221). The drive plate (222) is connected to the drive end of the drive mechanism (3). The guide includes a guide rod (231) slidably disposed on the mounting plate (221) and a spring (232) sleeved on the guide rod (231). The front end of the guide rod (231) is connected to the gripping assembly (21), and the spring (232) is disposed between the gripping assembly (21) and the mounting plate (221).

4. The bending mechanism according to claim 1, wherein The gripping component (21) includes a plurality of linearly arranged suction cups (211), which adsorb the battery cell at the front end of the pressing member (1).

5. The bending mechanism according to claim 3, wherein A limiting pad (6) is provided on the side opposite to the pressing member (1) or the mounting plate (221).

6. The bending mechanism of claim 1, wherein The bottom surface of the pressing member (1) is provided with a buffer pad (7).

7. The bending mechanism of claim 1, wherein The bottom of the pressing member (1) is provided with an upwardly curved arc segment on the side opposite to the gripping assembly (21).

8. A stringing device characterized by comprising: The bending mechanism as described in any one of claims 1-7 further includes a first adsorption component (9) and a second adsorption component (8) disposed on the mounting base (4). The first adsorption component (9) is disposed on both sides of the width of the second adsorption component (8) and is vertically connected to the mounting base (4) via a lifting component (11). The first adsorption component (9) is used to grip the pressing fixture (10). The second adsorption component (8) is disposed at the rear end of the pressing member (1) and is used to grip the rear end of the battery cell located below the pressing fixture (10). The gripping component (21) is disposed at the front end of the second adsorption component (8) and is used to grip the front end of the battery cell. The pressing member (1) is disposed between the gripping component (21) and the second adsorption component (8). The pressing fixture (10) is provided with a channel for the pressing member (1) and the gripping component (21) to pass through.

9. The stringing device of claim 8, wherein, It also includes a movable drive component connected to the mounting base (4), the movable drive component including at least two linear drive components driven in the vertical direction for driving the bending mechanism to transfer the battery cells and the string pressing fixture (10) to be laid into a continuous battery string in combination with the welding strip.

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