Bending device for lithium battery tabs

Abstract

The utility model relates to the technical field of lithium battery manufacturing, and discloses a lithium battery tab bending device which comprises a base, a bearing mechanism arranged on the base and capable of moving relative to the base, limiting mechanisms arranged on the two sides of the bearing mechanism, and a bending mechanism arranged on the base and corresponding to the position of a tab. And the positioning mechanism is used for relatively positioning the battery cell and the bearing mechanism. The battery cell is accurately positioned to the bearing mechanism through the positioning mechanism, and the bearing mechanism can move back and forth along the moving path, so that tabs on the two sides are sequentially moved to the bending mechanism to complete bending operation. According to the design, the battery cell does not need to be overturned or repeatedly positioned, the double-side tab bending process can be realized through one-time positioning, and the deformation or tearing risk of the tabs caused by multiple times of positioning is avoided; the limiting mechanism precisely limits the moving path of the bearing mechanism, it is ensured that the corresponding positions of the tabs and the bending mechanism are kept consistent, and the bending precision is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to a bending device for lithium battery tabs. Background Technology

[0002] The tabs are an important component of lithium-ion batteries. They are metallic conductors extending from the positive and negative terminals of the battery, connecting the internal electrodes to the external circuitry to enable the battery to charge and discharge. During the lithium battery manufacturing process, the tabs often need to be bent to facilitate later connection.

[0003] To save costs, some existing electrode bending devices only have a single bending mechanism. The electrode is positioned by a positioning mechanism. After positioning, only one side of the electrode corresponds to the position of the bending mechanism. Therefore, when bending the other side of the electrode, the battery cell needs to be removed first, the battery cell needs to be positioned again, and then the electrode is bent. This repeated positioning method is cumbersome and the electrode is prone to plastic deformation or tearing during repeated positioning.

[0004] In addition, when processing battery cells of different sizes, the positioning mechanism needs to be replaced manually, which takes a long time. For tabs with different bending requirements, bending mechanisms with different bending directions also need to be replaced, which limits the range of applications.

[0005] Therefore, it is necessary to provide a new bending device for lithium battery tabs to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to provide a bending device for lithium battery tabs to solve the problems in the prior art. It can avoid repeated flipping and repositioning of the battery cell. In addition, it can also bend tabs with different bending requirements.

[0007] This utility model provides a bending device for lithium battery tabs, comprising:

[0008] Base;

[0009] A support mechanism for supporting the battery cell is disposed on the base and is movable relative to the base.

[0010] A limiting mechanism, used to limit the movement path of the supporting mechanism, is provided on both sides of the supporting mechanism;

[0011] A bending mechanism, used for bending the electrode tabs, is provided on the base and corresponds to the position of the electrode tabs;

[0012] A positioning mechanism is used to position the battery cell relative to the support mechanism, and is disposed on the support mechanism.

[0013] In the above-described bending device for lithium battery tabs, preferably, the supporting mechanism includes a support plate and a first guide fitting. The first guide fitting is disposed at the bottom of the support plate, and a first guide is disposed on the base. The first guide fitting and the first guide fitting are guided and engaged to allow the support plate to reciprocate on the first guide fitting.

[0014] In the lithium battery tab bending device described above, preferably, the limiting mechanism includes a suction member and a first adjusting component for adjusting the position of the suction member, suction mating members are provided on both sides of the support plate, the suction mating members are attracted and mated with the suction member, and the first adjusting component is provided on the side of the suction member opposite to the suction mating member.

[0015] In the lithium battery tab bending device described above, preferably, the first adjusting component includes a support base, a first adjusting rod, and a first guide rod. The support base is disposed on the base, the first adjusting rod is threadedly connected to the support base and extends to the suction member, and the first guide rod is disposed on both sides of the first adjusting rod and respectively passes through the support base and connects to the suction member.

[0016] The bending device for a lithium battery tab as described above, preferably, includes a support frame, a pressing component for pressing the tab, and a bending component for bending the tab. The support frame is mounted on the base, the pressing component is located on the side of the support frame facing the tab, and the bending component is located on the side of the pressing component away from the tab.

[0017] In the lithium battery tab bending device described above, preferably, the pressing assembly includes a first driving member, two opposing first pressure plates, and a support platform. The first driving member and the support platform are both mounted on the support frame, and the output end of the first driving member and the end of the support platform are respectively connected to one of the first pressure plates.

[0018] In the lithium battery tab bending device described above, preferably, the bending assembly includes a second driving member and a second pressure plate, the second driving member is disposed opposite to the support frame, and the output ends of the two second driving members are respectively connected to a second pressure plate.

[0019] In the lithium battery tab bending device described above, preferably, guide rollers are respectively provided on the side of the two second pressure plates facing the two first pressure plates.

[0020] In the lithium battery tab bending device described above, preferably, the positioning mechanism includes two first baffles arranged opposite each other and an adjusting member. The two first baffles are respectively mounted on both sides of the support plate, and the bottom of the two first baffles is respectively provided with second guide fittings. The support plate is provided with second guide fittings, and the second guide fittings are guided and fitted with the second guide fittings. The adjusting member connects the two first baffles and is used to adjust the preset distance between the two first baffles.

[0021] In the lithium battery tab bending device described above, preferably, a second adjusting component is provided on the support plate. The second adjusting component includes a fixed plate, a second baffle, a second adjusting rod, and a second guide rod. The fixed plate and the second baffle are disposed opposite to each other on the support plate. The fixed plate is fixed to the support plate and is disposed further away from the bending mechanism than the second baffle. The second adjusting rod is threadedly connected to the fixed plate and extends to the second baffle. The second guide rod is disposed on both sides of the second adjusting rod and passes through the fixed plate and the second baffle, respectively.

[0022] Compared with existing technologies, this invention uses a positioning mechanism to precisely position the battery cell to the supporting mechanism. The supporting mechanism can move back and forth along the moving path, allowing the two tabs to move sequentially to the bending mechanism to complete the bending operation. This design eliminates the need to flip the battery cell or perform repeated positioning. The bending process of both tabs can be completed in one positioning, avoiding the risk of deformation or tearing of the tabs due to multiple positioning, and improving the operating efficiency of this device.

[0023] The limiting mechanism precisely limits the movement path of the supporting mechanism, ensuring that the corresponding positions of the electrode tab and the bending mechanism remain consistent, effectively improving bending accuracy.

[0024] In addition, the positioning mechanism is adjustable and can be adapted to battery cells of different sizes, which greatly shortens the production line changeover time and reduces equipment debugging costs. Attached Figure Description

[0025] Figure 1 This is a perspective view of the bending device for the lithium battery tab provided in an embodiment of the present invention;

[0026] Figure 2 This is a perspective view of the base and bending mechanism provided in an embodiment of this utility model;

[0027] Figure 3 This is a perspective view of the supporting mechanism, limiting mechanism, and second adjusting component provided in an embodiment of this utility model.

[0028] Figure 4 This is a perspective view of the bending mechanism provided in an embodiment of this utility model;

[0029] Figure 5 This is a perspective view of the positioning mechanism and the battery cell provided in an embodiment of this utility model;

[0030] Figure 6 This is a perspective view of the second adjustment component provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10-Base, 11-First guide element;

[0033] 20-Supporting mechanism, 21-Bearing plate, 210-Attraction mating part, 22-First guide mating part, 23-Second guide part;

[0034] 30-Limiting mechanism, 31-Attraction component, 32-First adjusting assembly, 320-Support base, 321-First adjusting rod, 322-First guide rod;

[0035] 40-Bending mechanism, 41-Support frame, 42-Pressure holding assembly, 420-First driving component, 421-First pressure plate, 422-Support platform, 43-Bending assembly, 430-Second driving component, 431-Second pressure plate, 432-Transfer frame, 44-Guide roller;

[0036] 50 - Positioning mechanism, 51 - First baffle, 510 - Second guide fitting, 52 - Adjusting component, 520 - Threaded rod, 521 - Mounting plate;

[0037] 60-Second adjusting component, 61-Fixing plate, 62-Second baffle, 63-Second adjusting rod, 64-Second guide rod;

[0038] 70 - battery cell, 71 - electrode tab. Detailed Implementation

[0039] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] To save costs, existing electrode 71 bending devices often only have one bending device. After the battery cell 70 is positioned by the positioning mechanism 50, it is aligned with the bending position for bending. However, the existing positioning mechanism 50 lacks a moving mechanism. Therefore, when bending the electrode 71, there is only one reference position for positioning with the bending mechanism 40. When bending another electrode 71, the battery cell 70 needs to be removed, flipped, repositioned, and then bent. Due to the special material of the electrode 71, it is easy to cause damage if the operation is not done properly during repeated positioning. Furthermore, due to the limitations of the existing positioning mechanism 50, different positioning mechanisms 50 need to be replaced for battery cells 70 of different sizes.

[0041] Therefore, see Figure 1 As shown, this utility model provides a bending device for a lithium battery tab 71, including a base 10, a supporting mechanism 20, a limiting mechanism, a bending mechanism 40, and a positioning mechanism 50, wherein:

[0042] The base 10 serves as a workbench to support various mechanisms.

[0043] The support mechanism 20 is used to support the battery cell 70 and is located on the base 10. The support mechanism 20 can move relative to the base 10. The movement of the support mechanism 20 drives the battery cell 70 to move, so that the two tabs 71 can reach the bending mechanism 40 for bending. The beginning of the movement path can be set to the position of one tab 71 corresponding to the bending mechanism 40, and the end of the movement path can be set to the position of the other tab 71 corresponding to the bending mechanism 40, thereby avoiding the flipping of the battery cell 70.

[0044] The limiting mechanism is used to limit the movement path of the supporting mechanism 20 and is located on both sides of the supporting mechanism 20. The supporting mechanism 20 is respectively located at the beginning and end of the movement path, and the supporting mechanism 20 ensures positioning reliability and movement repeatability by abutting against the limiting mechanism.

[0045] A bending mechanism 40 is used to bend the tabs 71. It is mounted on the base 10 and corresponds to the position of the tabs 71. Only one bending mechanism 40 needs to be provided. The battery cell 70 is moved by the supporting mechanism 20, so that the battery cell 70 does not need to be flipped so that the tabs 71 can be bent by the bending mechanism 40. In this embodiment, the position of the bending mechanism 40 corresponding to the tabs 71 is relative to the direction of gravity. Since the supporting mechanism 20 is movable, the horizontal position of the bending mechanism 40 is not limited.

[0046] The positioning mechanism 50 is mounted on the support mechanism 20 and is used to position the battery cell 70 relative to the support mechanism 20. Since the battery cell 70 of this application only needs to be positioned once to bend the two tabs 71 separately, it can eliminate the flipping error and increase the operational stability.

[0047] In this embodiment, see Figure 2-3As shown, the supporting mechanism 20 includes a support plate 21 and a first guide fitting. The first guide fitting is located at the bottom of the support plate 21, and a first guide 11 is provided on the base 10. The first guide 11 and the first guide fitting engage to guide and engage, so that the support plate 21 reciprocates on the first guide 11. The guiding engagement between the first guide 11 and the first guide fitting guides and limits the movement of the support plate 21 on the base 10, making its movement path unique and improving the accuracy of engagement with the bending mechanism 40. The first guide 11 and the first guide fitting can be linear guides and sliders, etc. A more preferred implementation is to use dovetail grooves and sliders for guiding engagement. It should be noted that no debris or dust will enter the dovetail groove during the bending process of the tab 71. Therefore, this method can reduce costs without affecting the sliding effect. The drive of the first guide 11 and the first guide fitting can be manual or electric, which is not limited here.

[0048] See Figure 3 As shown, the limiting mechanism includes an attraction element and a first adjustment component 32 for adjusting the position of the attraction element. Attraction mating parts are provided on both sides of the support plate 21, and these parts attract and engage with the attraction element. The first adjustment component 32 is located on the side of the attraction element opposite to the attraction mating parts. In the embodiment provided in this application, the attraction element is a magnetic sheet, and the attraction mating part is a magnetic plate. The two attraction elements are located at the beginning and end of the movement path, respectively. When the support plate 21 is located at the beginning or end of the movement path, it can be attracted by the magnetic sheet and the magnetic plate, respectively. Therefore, during bending, the position of the support plate 21 is limited, preventing the tab 71 from shifting during operation and improving the positioning effect. When force is applied to the support plate 21, the attraction between the magnetic sheet and the magnetic plate weakens, making it easier to move it to the other side.

[0049] The attracting element and the attracting mating element can also be structures such as suction cups and suction plates, and are not limited here. The first adjustment component 32 can adjust the distance between the magnetic plates on both sides as needed, thereby accommodating different sizes of battery cells 70 and increasing the applicability of the device.

[0050] In one possible implementation, see [link to implementation details]. Figure 1 and Figure 3As shown, the first adjustment assembly 32 includes a support base 320, a first adjustment rod 321, and a first guide rod 322. The support base 320 is mounted on the base 10. The first adjustment rod 321 is threadedly connected to the support base and extends to the suction member. The first guide rod 322 is located on both sides of the first adjustment rod 321 and passes through the support base 320 to connect with the suction member. The support base 320 is fixedly connected to the base 10, and the suction member does not contact the base 10. By rotating the first adjustment rod 321, the suction member can be moved closer to or away from the support base 320, thereby adjusting the distance between the two suction members. The first guide rod 322 is used for guidance and positioning, ensuring that the suction member always moves closer to or away from the support base 320 along a straight trajectory during adjustment, avoiding uneven adjustment of the distance between the two suction members due to shaking.

[0051] In this embodiment, see Figure 1-2 and Figure 4 As shown, the bending mechanism 40 includes a support frame 41, a clamping assembly 42 for clamping the tab 71, and a bending assembly 43 for bending the tab 71. The support frame 41 is mounted on the base 10, the clamping assembly 42 is located on the side of the support frame 41 facing the tab 71, and the bending assembly 43 is located on the side of the clamping assembly 42 away from the tab 71. The tab 71 is first clamped and fixed by the clamping assembly 42 on the side of the tab 71 closest to the cell 70, which ensures that the tab 71 does not shift or deform during the bending process, providing a stable reference for subsequent bending. When the bending assembly 43 performs the bending operation, the tab 71 can be bent smoothly at a preset angle with the end closest to the clamping assembly 42 as the node.

[0052] See Figure 4 As shown, the clamping assembly 42 includes a first driving member 420, two opposing first pressure plates 421, and a support platform 422. Both the first driving member 420 and the support platform 422 are mounted on a support frame 41. The output end of the first driving member 420 and the end of the support platform 422 are respectively connected to a first pressure plate 421. The fixed end of the first driving member 420 is connected to the support frame 41. The first driving member 420 drives the first pressure plate 421 connected to its output end to move closer to or further away from the first pressure plate 421 connected to the end of the support platform 422, thereby clamping or releasing the electrode tab 71. The support platform 422 is used to raise one of the first pressure plates 421 to a preset height, preferably so that one side of the electrode tab 71 can be placed on the first pressure plate 421. This prevents bending when the first driving member 420 drives the first pressure plate 421 to clamp the electrode tab 71. In the embodiments provided in this application, the first driving member 420 is a cylinder or hydraulic cylinder, preferably a cylinder, but this is not limited here.

[0053] See Figure 4As shown, the bending assembly 43 includes a second driving member 430 and a second pressure plate 431. The second driving members 430 are disposed opposite each other on the support frame 41, and the output ends of the two second driving members 430 are respectively connected to a second pressure plate 431. The two second driving members 430 can drive the second pressure plate 431 connected to them to move closer to the other second pressure plate 431, thereby enabling bending of the tab 71 in different directions and at different angles, breaking through the limitations of traditional unidirectional bending and further improving the applicability of the device. In the embodiments provided in this application, the fixed ends of the two second driving members 430 can be connected to the support frame 41 respectively through a C-type adapter frame 432 to improve the stability of the device. In addition, the second driving member 430 can be a hydraulic rod, an electric push rod, or a cylinder, etc., preferably a hydraulic rod, but not limited here.

[0054] To avoid wear on the bending node of tab 71, see [reference needed]. Figure 4 As shown, in this embodiment, guide rollers 44 are respectively provided on the side of the two second pressure plates 431 facing the two first pressure plates 421. The guide rollers 44 can convert the sliding friction between the sidewall of the second pressure plate 431 and the tab 71 into rolling friction, thereby reducing the damage to the tab 71 caused by friction during bending.

[0055] In this embodiment, see Figure 1 and Figure 5 As shown, the positioning mechanism 50 includes two first baffles 51 arranged opposite each other and an adjusting member 52. The two first baffles 51 are respectively mounted on both sides of the support plate 21. The bottom of the two first baffles 51 is respectively provided with a second guide fitting 510. A second guide is provided on the support plate 21, and the second guide fitting and the second guide fitting 510 are guided and fitted. The adjusting member 52 connects the two first baffles 51 and is used to adjust the preset distance between the two first baffles 51. The battery cell 70 is placed between the two first baffles 51. The adjusting member 52 adjusts the two first baffles 51 to move closer to the battery cell 70 and press against both sides of the battery cell 70, thereby positioning the battery cell 70. The cross-section of the first baffle 51 can be set to L-shape. The horizontal ends of the two first baffles 51 are arranged opposite each other and there is a certain distance between them, so that the tab 71 can extend to the outside of the support plate 21. The space formed by the two first baffles 51 can surround the battery cell 70 and limit the length and width of the battery cell 70.

[0056] See Figure 3 and Figure 5As shown in the embodiment provided in this application, the second guide is a groove, and the second guide fitting 510 is a protrusion. The groove can be a dovetail groove or a straight groove, etc. The two first baffles 51 can move along the width direction of the battery cell 70, so as to be suitable for battery cells 70 of different widths. The adjusting member 52 includes a threaded rod 520 and a mounting plate 521. The mounting plate 521 is fixed on both sides of the bearing plate 21. The threaded rod 520 is rotatably connected to the mounting plate 521. The threaded rod 520 has threaded sections with opposite thread directions at both ends. The two first baffles 51 are respectively threadedly connected to the two threaded sections. When the threaded rod 520 is rotated, the two first baffles 51 can move closer to each other or further away from each other.

[0057] To improve the positioning of cell 70, see [link / reference]. Figure 1 , Figure 3 and Figure 6 As shown, a second adjustment component 60 is provided on the support plate 21, located between the two first baffles 51, and can be positioned in the length direction of the battery cell 70. The second adjustment component 60 includes a fixed plate 61, a second baffle 62, a second adjustment rod 63, and a second guide rod 64. The fixed plate 61 and the second baffle 62 are disposed opposite each other on the support plate 21. The fixed plate 61 is fixed to the support plate 21, and the fixed plate 61 is disposed further away from the bending mechanism 40 than the second baffle 62. The second adjustment rod 63 is threadedly connected to the fixed plate 61 and extends to the second baffle 62. The second guide rod 64 is disposed on both sides of the second adjustment rod 63 and passes through the fixed plate 61 and the second baffle 62 respectively. The battery cell 70 is placed on the support plate 21 and positioned by the positioning mechanism 50. Then, the second adjusting rod 63 is rotated, and the second baffle 62 can move closer to or further away from the fixed plate 61, so that the second baffle 62 abuts against the battery cell 70. The first baffle 51 and the second baffle 62 cooperate to position the battery cell 70 from multiple directions, making the battery cell 70 more stable when the support plate 21 moves and bends. In addition, since the first baffle 51 and the second baffle 62 are both adjustable, the size of the placement space formed by the first baffle 51 and the second baffle 62 can be flexibly adjusted according to the size of the battery cell 70, so as to position the battery cells 70 of different sizes.

[0058] The working principle of the lithium battery tab 71 bending device provided by this utility model is as follows:

[0059] When using this device, the operator can first rotate the threaded rod 520 as needed, and drive the first baffles 51 on both sides to move relative to or opposite to each other through the threaded sections on both sides of the outer wall with opposite thread directions, thereby adjusting the preset distance between the first baffles 51 on both sides.

[0060] Rotating the second adjusting rod 63 causes the second baffle 62 to move on the bearing plate 21 until the inner wall of the space formed by the first baffle 51 and the second baffle 62 abuts against the outer wall of the battery cell 70 to be bent, thereby positioning the battery cell 70 to be bent.

[0061] The support plate 21 slides on the first guide 11 via the first guide fitting to move toward one of the suction members until the suction member fitting on that side abuts against the corresponding suction member. Then, the first adjusting rod 321 is rotated to move the suction member and the support plate 21 until the tab 71 away from that side moves to below the holding assembly 42. At this time, the position of the suction member on one side, i.e. the beginning of the movement path of the support plate 21, is determined. The support plate 21 is moved again to separate it from the suction member on that side. When the tab 71 near that side is below the holding assembly 42, the suction member on the other side is adjusted to move toward the suction fitting on the other side until it abuts against the other side. That is, the end of the movement path of the support plate 21 is determined. When the support plate 21 moves to the beginning of the movement path, the tab 71 near the end of the movement path corresponds to the bending mechanism 40. When the support plate 21 moves to the end of the movement path, the tab 71 away from the end of the movement path corresponds to the bending mechanism 40.

[0062] When the tab 71 corresponds to the bending mechanism 40, the operator controls the first driving component 420 to move towards the support platform 422. The two first pressure plates 421 clamp and position the root of the tab 71 near the cell 70. According to the required bending direction of the tab 71, the corresponding second driving component 430 is controlled to drive. When the two second pressure plates 431 press against the tab 71, the tab 71 can be bent.

[0063] After bending one side tab 71, simply push the support plate 21 to make the suction member on the other side abut against the corresponding suction mating member, and the other side tab 71 can be bent. By adopting this sliding positioning method, there is no need to flip the cell 70 for secondary positioning and installation, reducing positioning errors and improving the convenience of the device.

[0064] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0065] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A bending device for lithium battery tabs, characterized in that, include: Base; A support mechanism for supporting the battery cell is disposed on the base and is movable relative to the base. A limiting mechanism, used to limit the movement path of the supporting mechanism, is provided on both sides of the supporting mechanism; A bending mechanism, used for bending the electrode tabs, is provided on the base and corresponds to the position of the electrode tabs; A positioning mechanism is used to position the battery cell relative to the support mechanism, and is disposed on the support mechanism.

2. The bending device for lithium battery tabs according to claim 1, characterized in that, The supporting mechanism includes a bearing plate and a first guide fitting. The first guide fitting is located at the bottom of the bearing plate, and a first guide is provided on the base. The first guide and the first guide fitting are guided and engaged to allow the bearing plate to reciprocate on the first guide.

3. The bending device for lithium battery tabs according to claim 2, characterized in that, The limiting mechanism includes a suction member and a first adjusting component for adjusting the position of the suction member. Suction engaging members are provided on both sides of the support plate, and the suction engaging members engage with the suction member. The first adjusting component is located on the side of the suction member opposite to the suction engaging members.

4. The bending device for lithium battery tabs according to claim 3, characterized in that, The first adjustment assembly includes a support base, a first adjustment rod, and a first guide rod. The support base is disposed on the base. The first adjustment rod is threadedly connected to the support base and extends to the suction member. The first guide rod is disposed on both sides of the first adjustment rod and passes through the support base and is connected to the suction member.

5. The bending device for lithium battery tabs according to claim 1, characterized in that, The bending mechanism includes a support frame, a pressing component for pressing the electrode tab, and a bending component for bending the electrode tab. The support frame is mounted on the base, the pressing component is located on the side of the support frame facing the electrode tab, and the bending component is located on the side of the pressing component away from the electrode tab.

6. The bending device for lithium battery tabs according to claim 5, characterized in that, The pressing assembly includes a first driving member, two opposing first pressure plates, and a support platform. The first driving member and the support platform are both mounted on the support frame. The output end of the first driving member and the end of the support platform are respectively connected to one of the first pressure plates.

7. The bending device for lithium battery tabs according to claim 6, characterized in that, The bending assembly includes a second driving member and a second pressure plate. The second driving member is disposed opposite to the support frame, and the output ends of the two second driving members are respectively connected to a second pressure plate.

8. The bending device for lithium battery tabs according to claim 7, characterized in that, Guide rollers are respectively provided on the side of the two second pressure plates facing the two first pressure plates.

9. The bending device for lithium battery tabs according to claim 2, characterized in that, The positioning mechanism includes two first baffles arranged opposite each other and an adjusting member. The two first baffles are respectively mounted on both sides of the support plate. The bottom of the two first baffles is respectively provided with a second guide fitting. The support plate is provided with a second guide fitting. The second guide fitting and the second guide fitting are guided and engaged. The adjusting member connects the two first baffles and is used to adjust the preset distance between the two first baffles.

10. The bending device for lithium battery tabs according to claim 2, characterized in that, A second adjustment assembly is provided on the support plate. The second adjustment assembly includes a fixed plate, a second baffle, a second adjustment rod, and a second guide rod. The fixed plate and the second baffle are disposed opposite to each other on the support plate. The fixed plate is fixed to the support plate and is disposed further away from the bending mechanism than the second baffle. The second adjustment rod is threadedly connected to the fixed plate and extends to the second baffle. The second guide rod is disposed on both sides of the second adjustment rod and passes through the fixed plate and the second baffle, respectively.

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