Tab folding device

Abstract

The utility model discloses a pole lug folding device which comprises a base, a pole lug folding device and a pole lug folding device. The clamping mechanism is arranged on the base, and the clamping mechanism is used for clamping and positioning the part, exposed above the positioning hole, of the battery cell; and the tab bending mechanism is arranged on the base and is used for bending tabs of the battery cells which are placed in the positioning holes and are clamped and positioned by the clamping mechanism. According to the utility model, the battery cell is placed in the positioning hole and then is secondarily fixed through the clamping mechanism, so that the stability of the battery cell and the bending precision of the tab are ensured, and finally, the tab bending mechanism is manually or automatically controlled to bend the tab, so that the structure is simple, the operation is convenient, and the production efficiency is improved. The instability in the pure manual tab bending process is avoided to a great extent, and the tab bending efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of battery tab bending, in particular to a tab folding device. Background Art

[0002] With the widespread application of lithium-ion batteries, the quality requirements for the battery cells inside lithium-ion batteries are becoming higher and higher. Among them, the battery cell includes a pole piece and a pole ear arranged on the pole piece. During the production and assembly process of the battery cell, the pole ear on the pole piece needs to be bent to a suitable angle and position to facilitate the subsequent battery cell into the shell and the connection between the pole ear and the shell.

[0003] The existing folding of the tabs is usually done manually. Due to the different operators and inconsistent operating techniques, there is great instability and inaccuracy, which may easily cause the insulating sheet to fall off, the tabs to block the holes, the tabs to bend, and the battery cell diaphragm to be damaged, affecting the quality of the finally assembled lithium-ion battery and reducing the production efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a pole ear folding device, aiming to solve the problem of unstable quality when manually folding pole ears.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a folding ear device, comprising:

[0006] A base, wherein a positioning hole is provided on the top of the base;

[0007] A clamping mechanism, the clamping mechanism is arranged on the base, and the clamping mechanism is used to clamp and position the portion of the battery cell protruding above the positioning hole;

[0008] A tab bending mechanism is provided on the base and is used to bend the tab of the battery cell which is placed in the positioning hole and clamped and positioned by the clamping mechanism.

[0009] In some embodiments, the depth of the positioning hole is less than half of the height of the battery cell.

[0010] In some embodiments, the clamping mechanism includes a driving member and two clamping jaws connected to the driving member, and the driving member is used to drive the clamping jaws to move toward each other to clamp the battery cell, and drive the clamping jaws to move away from each other to release the battery cell.

[0011] In some embodiments, an elastic adhesive layer is provided on one side of the two clamping jaws facing each other, and the clamping jaws are in contact with the side of the battery core through the elastic adhesive layer.

[0012] In some embodiments, an arc-shaped groove is provided on one side of the two clamping jaws facing each other, and the inner wall of the arc-shaped groove is used to contact the cylindrical outer side surface of the battery core.

[0013] In some embodiments, the clamping mechanism is detachably connected to the base in a manner that the installation position is adjustable.

[0014] In some embodiments, the tab bending mechanism includes:

[0015] A bending member, the bending member includes a connecting rod and a top sheet detachably connected to the connecting rod, the connecting rod is slidably connected to the base, and is used to drive the top sheet to fold the tab;

[0016] A moving member, the moving member is connected to the connecting rod, and is used to drive the bending member to move along a fixed direction and fold the tab.

[0017] In some embodiments, the moving member includes:

[0018] A first transmission member, the first transmission member includes a first end, a second end and a turning portion, the turning portion is disposed between the first end and the second end, and the first end, the second end and the turning portion are not on the same straight line;

[0019] A second transmission member, the second transmission member includes a third end and a fourth end arranged oppositely;

[0020] The first end of the first transmission member is hinged to the base, the turning portion of the first transmission member is hinged to the third end of the second transmission member, and the fourth end of the second transmission member is hinged to the bending member, so that when the first transmission member rotates around the base, the bending member can be driven to move in the horizontal direction.

[0021] In some embodiments, the moving member further includes a mounting bracket, the mounting bracket is disposed on the base, the mounting bracket is configured with a limiting ring, the connecting rod passes through the limiting ring and is slidably connected to the limiting ring, and the first end of the first transmission member is hinged to the mounting bracket.

[0022] In some embodiments, a mounting plate is provided at the bottom of the mounting bracket, and the mounting plate is threadedly connected to the base.

[0023] In the present utility model, the battery cell is placed in the positioning hole, and then the battery cell is secondarily fixed by the clamping mechanism to ensure the stability of the battery cell and the accuracy of the tab bending. Finally, the tab is bent by the tab bending mechanism. The structure is simple and the operation is convenient. Moreover, since the battery cell is in a fixed position each time the tab is bent, the effect of each tab bending is as consistent as possible, greatly avoiding the instability in the process of manually folding the tab, and improving the tab bending efficiency. Description of the Drawings

[0024] Figure 1 The top view of an embodiment of the folding tab device of the present utility model;

[0025] Figure 2 The structural schematic diagram of another embodiment of the folding tab device of the present utility model;

[0026] Figure 3 The structural schematic diagram of the tab bending mechanism in the folding tab device of the present utility model.

[0027] Reference numerals:

[0028] 100, base; 110, positioning hole; 200, clamping mechanism; 210, driving member; 220, clamping jaw; 221, elastic rubber layer; 222, arc-shaped groove; 300, tab bending mechanism; 310, bending member; 311, connecting rod; 312, top piece; 320, moving member; 321, first transmission member; 321a, first end; 321b, second end; 321c, turning part; 322, second transmission member; 322a, third end; 322b, fourth end; 323, mounting bracket; 323a, limiting ring; 323b, mounting plate. Detailed implementation manners

[0029] Next, the solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0030] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0032] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The present utility model provides a folded tab device. Referring to Figure 1 and Figure 2 , the folded tab device includes:

[0034] A base 100, on the top of which there is a positioning hole 110;

[0035] A clamping mechanism 200, which is arranged on the base 100 and is used for clamping and positioning the part of the battery cell protruding above the positioning hole 110;

[0036] A tab bending mechanism 300, which is arranged on the base 100 and is used for bending the tabs of the battery cell placed in the positioning hole 110 and clamped and positioned by the clamping mechanism 200.

[0037] The base 100 provides the structural support for the entire device, and its size and dimensions can be selected according to needs. Usually, the bottom of the base 100 is provided with structures for mounting the base 100 on the mounting surface, such as support feet, bolt holes, etc., which are not limited in this application. Preferably, in this application, the base 100 is in the shape of a regular cuboid, with a buckle provided on one side and a slot provided on the other side opposite to this side, and the two can cooperate with each other so that multiple bases 100 can be connected to each other, facilitating the tab bending operation of multiple battery cells simultaneously.

[0038] The positioning holes 110 on the base 100 are used to place the battery cells. The shape of the positioning holes 110 can be set according to the shape of the battery cells. For example, if the tabs of a folded hexagonal prism-shaped battery cell need to be processed, the positioning holes 110 are set to be hexagonal prism-shaped; if the tabs of a folded cylindrical battery cell need to be processed, the positioning holes 110 are set to be cylindrical. At the same time, since tabs are also provided at the bottom of some battery cells, the positioning holes 110 can be set in the form of through holes, and a counterbore is constructed in the positioning holes 110 to carry the edge part of the battery cell and prevent the battery cell from falling out of the positioning holes 110. Due to the systematic error in the processing equipment and to facilitate the smooth placement of the battery cell into the positioning holes 110, the size of the positioning holes 110 is usually slightly larger than that of the battery cell, which may cause the battery cell to shake during the process of bending the tabs, resulting in the folded tabs not meeting the requirements. Therefore, a clamping mechanism 200 is provided to secondarily fix the battery cell placed in the positioning holes 110 and prevent the battery cell from moving during the process of bending the tabs.

[0039] During use, first place the battery cell in the positioning holes 110, and then use the clamping mechanism 200 to clamp and position the part of the battery cell protruding above the positioning holes 110 to ensure that the battery cell is firmly fixed. Subsequently, the user controls the tab bending mechanism 300 to complete the tab bending operation on the fixed battery cell manually or automatically.

[0040] In this utility model, the battery cell is placed in the positioning holes 110, and then the clamping mechanism 200 is used to secondarily fix the battery cell to ensure the stability of the battery cell and the accuracy of tab bending. Finally, the tab bending mechanism 300 is controlled manually or automatically to complete the bending of the tabs. The structure is simple and the operation is convenient. Moreover, since the battery cell is in a fixed position each time the tabs are bent, the effect of each tab bending is as consistent as possible, greatly avoiding the instability in the process of manually folding the tabs and improving the tab bending efficiency.

[0041] In some embodiments, the depth of the positioning holes 110 is less than half of the height of the battery cell.

[0042] When the depth of the positioning holes 110 is less than half of the height of the battery cell, most of the battery cell will protrude above the positioning holes 110, making it easier for the clamping mechanism 200 to contact and clamp the protruding part of the battery cell, thus ensuring greater stability of the battery cell during the bending process and further improving the accuracy of tab bending. Also, the relatively shallow positioning holes 110 make it easier to place the battery cell into or remove it from the positioning holes 110, improving the efficiency of tab folding.

[0043] Such as Figure 1 and Figure 2As shown, in some embodiments, the clamping mechanism 200 includes a driving member 210 and two jaws 220 connected to the driving member 210. The driving member 210 is configured to drive the jaws 220 to move towards each other to clamp the battery cell, and to drive the jaws 220 to move away from each other to release the battery cell.

[0044] By controlling the movement of the jaws 220 through the driving member 210, precise control of the clamping force on the battery cell can be achieved, preventing the battery cell from being damaged due to excessive clamping force during the bending process, and also avoiding the battery cell from moving or tilting during the bending process due to insufficient clamping force. At the same time, the two jaws 220 clamp the battery cell in the middle, enabling a more uniform clamping force to be applied to the battery cell, avoiding the instability problems that may be caused by single-sided clamping, thereby improving the stability and precision of clamping. It can be understood that the user can manually control the driving member 210 to further control the movement of the jaws 220, or can control the driving member 210 through other control devices, and the present application does not limit this.

[0045] During use, the battery cell is placed in the positioning hole 110 of the base 100. Subsequently, the driving member 210 drives the two jaws 220 to move towards each other, clamping the part of the battery cell exposed above the positioning hole 110 and uniformly applying a clamping force to ensure the battery cell is stably fixed; when the ear bending is completed, the driving member 210 drives the jaws 220 to move away from each other to release the battery cell, and the user takes out the processed battery cell manually or automatically and repeats the above steps.

[0046] In this embodiment, the clamping mechanism 200 can accurately complete the operations of clamping and releasing the battery cell, improving the stability, precision and efficiency of clamping, and having a simple structure and low operation difficulty, which can effectively improve production efficiency and reduce production costs.

[0047] As Figure 1 shown, in some embodiments, an elastic glue layer 221 is provided on the side of the two jaws 220 facing each other, and the jaws 220 contact the side of the battery cell through the elastic glue layer 221.

[0048] The elastic glue layer 221 is usually made of polymer materials such as rubber, silica gel, polyurethane, etc., and has a relatively high friction coefficient. When contacting the side of the battery cell, it can effectively increase the friction force, preventing the battery cell from sliding or shifting during clamping and bending, thereby improving the stability and precision of clamping. And the elastic glue layer 221 has a certain elasticity and flexibility, which can adapt to small shape and size errors on the surface of the battery cell, ensure uniform distribution of the clamping force, and avoid scratching or indentation on the surface of the battery cell.

[0049] As Figure 1 shown, in some embodiments, an arc-shaped groove 222 is provided on the side of the two jaws 220 facing each other, and the inner wall of the arc-shaped groove 222 is used to contact the cylindrical outer side of the battery cell.

[0050] In this embodiment, the battery cell that requires the tab folding operation is cylindrical. By setting the part of the clamping jaw 220 in contact with the battery cell as an arc-shaped groove 222, the inner wall of the arc-shaped groove 222 can fit the cylindrical outer side of the battery cell, increasing the contact area between the clamping mechanism 200 and the battery cell to provide a more stable clamping force, reducing the probability of the battery cell moving and tilting during clamping. At the same time, the arc-shaped groove 222 can evenly distribute the clamping force on the outer side of the battery cell, preventing damage and deformation of the battery cell surface.

[0051] As Figure 1 and Figure 2 shown, in some embodiments, the clamping mechanism 200 is detachably connected to the base 100 in a manner that the installation position is adjustable.

[0052] There are various ways to make the installation position of the clamping mechanism 200 adjustable. For example, a slide rail can be installed on the base 100, and the clamping mechanism 200 is connected to the slide rail through a slider, enabling the clamping mechanism 200 to move on the slide rail, where the slider can be fixed at the required position through a locking device; multiple installation holes can also be reserved on the base 100, and the clamping mechanism 200 is fixed at different hole positions through bolts and nuts, and the position of the clamping mechanism 200 can be adjusted by changing different installation hole positions; magnets can also be installed on at least one of the base 100 and the clamping mechanism 200, and the connection is achieved through magnetic adsorption, and the position of the clamping mechanism 200 can be finely adjusted through a positioning pin or other limiting devices; the present application does not limit this.

[0053] The adjustable installation position enables the clamping mechanism 200 to adjust its position according to the size and shape of the battery cell, adapt to battery cells of different specifications and models, improve the versatility and flexibility of the equipment, and at the same time ensure that the battery cell is clamped at the optimal stress position, improve the stability of the battery cell, thereby improving the processing accuracy and processing efficiency and reducing errors.

[0054] As Figures 1-3 shown, in some embodiments, the tab bending mechanism 300 includes:

[0055] A bending member 310, the bending member 310 includes a connecting rod 311 and a top piece 312 detachably connected to the connecting rod 311. The connecting rod 311 is slidably connected to the base 100 and is used to drive the top piece 312 to fold the tab;

[0056] A moving member 320, the moving member 320 is connected to the connecting rod 311 and is used to drive the bending member 310 to move along a fixed direction and fold the tab.

[0057] Among them, the connecting rod 311 can be directly placed on the base 100, or it can be connected to the base 100 by setting a guide rail on the base 100 and making the connecting rod 311 connected to the guide rail through a slider, so as to realize sliding with the base 100. The shape of the top piece 312 can be determined according to the cell model, the shape of the tab and the bending requirements. Usually, it is made of wear-resistant and high-strength engineering plastics, alloys and other materials, and the detachable design of the top piece 312 is convenient for replacement and maintenance to adapt to different needs and improve the adaptability and flexibility of the equipment.

[0058] The moving member 320 can be an electric or pneumatic driving device, which is convenient for precisely controlling the moving speed and force of the connecting rod 311 and the top piece 312 to ensure the smoothness and precision of the tab folding process; the moving member 320 can also be a connecting structure, which is convenient for the user to control the movement of the connecting rod 311 through the moving member 320, so that the repeated operations of the user can be kept as consistent as possible, and the precision of the bending member 310 when repeatedly bending the tab can be guaranteed.

[0059] As Figure 3 shown, in some embodiments, the moving member 320 includes:

[0060] A first transmission member 321, the first transmission member 321 includes a first end 321a, a second end 321b and a turning portion 321c, the turning portion 321c is arranged between the first end 321a and the second end 321b, and the first end 321a, the second end 321b and the turning portion 321c are not on the same straight line;

[0061] A second transmission member 322, the second transmission member 322 includes a relatively arranged third end 322a and a fourth end 322b;

[0062] The first end 321a of the first transmission member 321 is hinged to the base 100, the second end 321b of the first transmission member 321 is hinged to the third end 322a of the second transmission member 322, and the fourth end 322b of the second transmission member 322 is hinged to the bending member 310, so that when the first transmission member 321 rotates around the base 100, the bending member 310 can be driven to move in the horizontal direction.

[0063] Exemplarily, in use, the first transmission member 321 is pushed to rotate around the base 100 manually or automatically. At this time, the turning portion 321c also rotates around the base 100. The third end 322a of the second transmission member 322 hinged to the turning portion 321c will also rotate around the base 100 under the transmission of the turning portion 321c, thereby driving the second end 321b of the second transmission member 322 to move forward, and at the same time driving the bending member 310 to move forward to realize the folding of the tab; when the first transmission member 321 rotates in the reverse direction, the bending member 310 retracts and waits for the next process of folding the tab to be completed.

[0064] Through the settings of the first transmission member 321 and the second transmission member 322, the user can drive the bending member 310 by rotating the first transmission member 321, without having to be close to the base 100, making the driving more convenient. And by adjusting the lengths and hinged positions of the respective transmission members, the user can set the position of the device for driving the first transmission member 321 according to different needs, or a position more suitable for manual operation by the user, so that the present utility model can adapt to a variety of application scenarios.

[0065] As Figure 2 and Figure 3 shown, in some embodiments, the moving member 320 further includes a mounting bracket 323. The mounting bracket 323 is disposed on the base 100. The mounting bracket 323 is configured with a limiting ring 323a. The connecting rod 311 passes through the limiting ring 323a and is slidably connected to the limiting ring 323a. The first end 321a of the first transmission member 321 is hinged to the mounting bracket 323. By restricting the movement trajectory of the connecting rod 311 through the limiting ring 323a, the probability of the connecting rod 311 shaking during movement and causing damage to the tab is reduced, and the accuracy of folding the tab is improved.

[0066] As Figure 3 shown, in some embodiments, a mounting plate 323b is provided at the bottom of the mounting bracket 323. The mounting plate 323b is threadedly connected to the base 100.

[0067] The threaded connection between the mounting plate 323b and the base 100 makes the connection between the two firm and not easy to loosen. At the same time, the threaded connection is convenient for disassembly and reinstallation. The user can add structures such as gaskets between the mounting plate 323b and the base 100 to adjust the heights of the moving member 320 and the bending member 310, so as to achieve precise folding of the tab, and can also be adjusted according to the height of the battery cell, so that the present utility model can complete the tab folding operation for different models of battery cells.

[0068] The above are only partial or preferred embodiments of the present utility model. Whether in terms of words or drawings, the scope of protection of the present utility model cannot be limited thereby. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the overall concept of the present utility model, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present utility model.

Claims

1. A folded tab device, characterized in that, Comprising: A base, on the top of which a positioning hole is provided; A clamping mechanism, which is arranged on the base and is used for clamping and positioning the part of the battery cell protruding above the positioning hole; An ear bending mechanism, which is arranged on the base and is used for bending the ears of the battery cell placed in the positioning hole and clamped and positioned by the clamping mechanism.

2. The folding tab device according to claim 1, wherein, The depth of the positioning hole is less than half of the height of the battery cell.

3. The folding tab device according to claim 1, wherein The clamping mechanism includes a driving member and two jaws connected to the driving member. The driving member is used to drive the jaws to move towards each other to clamp the battery cell, and to drive the jaws to move away from each other to release the battery cell.

4. The folding tab device according to claim 3, wherein, On one side of the two jaws facing each other, an elastic glue layer is provided, and the jaws contact the side part of the battery cell through the elastic glue layer.

5. The folding tab device according to claim 3 or 4, characterized in that, On one side of the two jaws facing each other, an arc-shaped groove is provided, and the inner wall of the arc-shaped groove is used to contact the cylindrical outer side surface of the battery cell.

6. The folding tab device according to any one of claims 1 to 4, characterized in that, The clamping mechanism is detachably connected to the base in a manner that the installation position is adjustable.

7. The folding tab device according to any one of claims 1 to 4, characterized in that The ear bending mechanism includes: A bending member, which includes a connecting rod and a top piece detachably connected to the connecting rod. The connecting rod is slidably connected to the base and is used to drive the top piece to fold the ears; A moving member, which is connected to the connecting rod and is used to drive the bending member to move along a fixed direction and fold the ears.

8. The folding tab device according to claim 7, wherein The moving member includes: A first transmission member, which includes a first end, a second end and a turning part. The turning part is arranged between the first end and the second end, and the first end, the second end and the turning part are not on the same straight line; A second transmission member, which includes a third end and a fourth end arranged oppositely; The first end of the first transmission member is hinged to the base, the turning part of the first transmission member is hinged to the third end of the second transmission member, and the fourth end of the second transmission member is hinged to the bending member, so that when the first transmission member rotates around the base, it can drive the bending member to move in the horizontal direction.

9. The folding tab device according to claim 8, wherein, The moving member further includes a mounting frame, which is arranged on the base. The mounting frame is configured with a limiting ring. The connecting rod passes through the limiting ring and is slidably connected to the limiting ring. The first end of the first transmission member is hinged to the mounting frame.

10. The folding tab device according to claim 9, wherein, A mounting plate is arranged at the bottom of the mounting frame, and the mounting plate is screwed to the base.

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