Tab bending device and battery manufacturing apparatus

Abstract

The utility model provides a kind of tab bending device and battery manufacturing equipment, tab bending device includes two ear folding mechanisms for bending positive tab and negative tab of battery cell, ear folding mechanism includes drive assembly and folding plate, drive assembly includes first driving part and second driving part, second driving part drives first driving part to move along the length direction of battery cell, folding plate is set up in pairs and is set up staggered along the length direction of battery cell, two drive ends of first driving part are respectively connected with the top end drive of two folding plates set up in pairs, the bottom end of each folding plate has two bending sections spaced apart along the width direction of battery cell, bending section is parallel with the top surface of battery cell.The structure of the first driving part, the second driving part and the folding plate of the application is matched, so that the folding plate can be adjusted along the length direction and the width direction of the battery cell, the bending section has the function of correcting the tab, and thus the problem of tab bending failure in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery-related technology, specifically to a tab bending device and battery manufacturing equipment. Background Technology

[0002] In the field of battery manufacturing, traditional rechargeable battery structures have significant limitations in the connection method between the tabs and the adapter plates. The tabs, as the key interface between the cell and the external circuitry, are typically connected to the adapter plates via super-soldering followed by laser welding. This process first super-solders the tabs to the adapter plates, and then uses a laser to weld the adapter plates to the battery top cover. However, this traditional connection process involves a core-wrapping action, resulting in significant redundancy at the base of the tabs. This increases the movement space of the tabs within the cell, posing a risk of short circuits due to the tabs being inserted too deeply.

[0003] Currently, new-structure rechargeable batteries are beginning to adopt a design where the tabs are directly bent onto the adapter plate and then fixed by laser welding. This significantly reduces redundancy at the base of the tabs and avoids short circuits in the cell caused by the tabs being inserted too low. However, this process requires extremely high precision from the incoming tab material, as the tabs need to land precisely on the adapter plate during the bending process; otherwise, the tab bending will fail, ultimately resulting in the scrapping of the cell. Especially when the incoming tab material has a certain degree of skew, this tab bending device struggles to guarantee accurate bending of the tabs, thus affecting the cell production efficiency and yield.

[0004] As can be seen from the above, the tab bending device in the existing technology is prone to tab bending failure, which leads to the scrapping of the battery cell. Utility Model Content

[0005] The main purpose of this utility model is to provide a tab bending device and a battery manufacturing equipment to solve the problem that the tab bending device in the prior art is prone to tab bending failure, which leads to the scrapping of the battery cell.

[0006] To achieve the above objectives, according to one aspect of the present invention, a tab bending device is provided. The tab bending device includes two tab bending mechanisms for bending the positive and negative electrodes of a battery cell, respectively. Each tab bending mechanism includes a driving assembly and a folding plate. The driving assembly is disposed above the battery cell and includes a first driving member and a second driving member. The second driving member is drivenly connected to the first driving member and is used to drive the first driving member to move along the length direction of the battery cell. The folding plates are arranged in pairs and staggered along the length direction of the battery cell. The two driving ends of the first driving member are drivenly connected to the top ends of the two paired folding plates, respectively. The bottom end of each folding plate has two bending segments spaced apart along the width direction of the battery cell. The bending segments are parallel to the top surface of the battery cell. Along the width direction of the battery cell, a portion of the bending segment of one folding plate is disposed in the area between the two bending segments of the other folding plate.

[0007] Furthermore, the folding plate includes two first plate segments spaced apart along the width direction of the battery cell, both of which extend along the height direction of the battery cell; a second plate segment, with a second plate segment at the bottom of each of the first plate segments, the second plate segment being parallel to the top surface of the battery cell, and the bending section being the second plate segment; and a connecting plate segment, with the top ends of the two first plate segments connected by the connecting plate segment, and the driving end of the first driving member being driven connected to the connecting plate segment.

[0008] Furthermore, along the length direction of the battery cell, the first plate segment and connecting plate segment of one of the folding plates are disposed on one side of the first plate segment and connecting plate segment of the other folding plate; the projection portions of the second plate segments of the two folding plates along the width direction of the battery cell overlap.

[0009] Furthermore, the connecting plate segment is parallel to the top surface of the battery cell, and the two first plate segments are symmetrical about the connecting plate segment; and / or the two second plate segments are symmetrical about the connecting plate segment.

[0010] Furthermore, the driving end of the first driving member is a guide rail plate, and the two guide rail plates are respectively connected to two folded plates. Along the width direction of the battery cell, the first driving member drives the two guide rail plates to move closer to or further away from each other.

[0011] Furthermore, the first driving component is a double-rod cylinder with telescopic output rods at both ends along the width direction of the battery cell; or the first driving component includes a driving component body and a screw, the driving component body is rotatably connected to the screw, the guide rail plate is rotatably sleeved on the screw, and the internal threads of the two guide rail plates have opposite directions of rotation.

[0012] Furthermore, the drive assembly also includes a third drive member disposed above the second drive member. The third drive member is drively connected to the second drive member and is used to provide driving force for the second drive member to move along the height direction of the battery cell.

[0013] Furthermore, each folding mechanism has two second driving components, which are arranged along the height direction of the battery cell. The upper second driving component is driven to connect with the lower second driving component, and the lower second driving component is driven to connect with the first driving component.

[0014] Furthermore, the folding plate has switchable first, second, and third positions. When the folding plate is in the first position, the two bent sections of the folding plate along the length of the cell are positioned between the positive and negative tabs. When the folding plate is in the second position, the two bent sections of the folding plate are in contact with the side of the positive or negative tab. When the folding plate is in the third position, the two bent sections of the folding plate press against the positive or negative tab and are stacked on the top surface of the adapter piece.

[0015] According to another aspect of the present invention, a battery manufacturing apparatus is provided, which includes the above-described tab bending device.

[0016] Applying the technical solution of this utility model, the tab bending device includes two tab bending mechanisms for bending the positive and negative tabs of the battery cell, respectively. The tab bending mechanism includes a driving component and a bending plate. The driving component is disposed above the battery cell and includes a first driving member and a second driving member. The second driving member is drivenly connected to the first driving member and is used to drive the first driving member to move along the length direction of the battery cell. The bending plates are arranged in pairs and staggered along the length direction of the battery cell. The two driving ends of the first driving member are drivenly connected to the top ends of the two paired bending plates, respectively. The bottom end of each bending plate has two bending segments spaced apart along the width direction of the battery cell. The bending segments are parallel to the top surface of the battery cell. Along the width direction of the battery cell, a portion of the bending segment of one bending plate is disposed in the area between the two bending segments of the other bending plate.

[0017] As can be seen from the above, the tab bending device of this application adopts a structure consisting of a first driving member, a second driving member, and a bending plate. The bending plate is adjustable along the length and width directions of the battery cell. The bending section of the bending plate is set to be parallel to the top surface of the battery cell. During the tab bending operation, the bending plate moves along the length direction of the battery cell under the drive of the second driving member until it fits against the side of the tab. In this process, the bending plate corrects the position of the tab to overcome the problem of tab tilt affecting the bending operation in the prior art. The first driving member drives the bending plate to move along the width direction of the battery cell to bend the tab to the top surface of the adapter piece. The structure of this application avoids large redundancy at the root of the tab and reduces the phenomenon of battery scrap due to tab failure, thereby improving the tab bending efficiency and the yield of battery assembly.

[0018] This application employs two folding mechanisms corresponding to bending the positive and negative electrodes respectively. The two folding mechanisms can perform bending operations independently and can adaptively perform the bending action of the corresponding positive or negative electrode as needed, thereby improving the flexibility of use, making it more suitable for different application scenarios, and improving the user experience. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A three-dimensional structural schematic diagram of the tab bending device provided in this application;

[0021] Figure 2 An enlarged view of the tab bending device provided in this application.

[0022] The above figures include the following reference numerals:

[0023] 10. Battery cell; 110. Positive tab; 120. Negative tab; 20. First driving component; 210. Guide rail plate; 30. Second driving component; 40. Folding plate; 410. First plate segment; 420. Second plate segment; 430. Connecting plate segment; 50. Adapter piece; 60. Third driving component. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problem that existing tab bending devices are prone to tab bending failures leading to cell scrap, this application provides a battery manufacturing apparatus for battery assembly.

[0028] like Figure 1 As shown, the battery manufacturing equipment includes a tab bending device, which is used to bend the tabs of the battery cell 10 and stack them on the adapter plate 50 along the height direction of the battery cell 10.

[0029] Specifically, in this application, multiple battery cells 10 are provided, and the multiple battery cells 10 are stacked along the width direction. The top surface of each battery cell 10 has a vertically placed positive electrode tab 110 and a negative electrode tab 120. The multiple battery cells 10 form multiple positive electrode tabs 110 on the positive electrode tab side and multiple negative electrode tabs 120 on the negative electrode tab side. Two adapter pieces 50 are provided, and the two adapter pieces 50 are provided on the top surface of the battery cell 10 and are provided in a one-to-one correspondence with the positive electrode tab 110 and the negative electrode tab 120.

[0030] Each adapter piece 50 has a first plate segment 410 and a second plate segment 420 spaced apart along the width direction of the battery cell 10. The first plate segment 410 and the second plate segment 420 are respectively disposed between two adjacent positive tabs 110 or two adjacent negative tabs 120.

[0031] Along the width direction of the cell 10, two positive tabs 110 or two negative tabs 120 of two adjacent cells 10 are provided between the first plate segment 410 and the second plate segment 420. The bending sections of the two folding plates 40 that are close to each other are provided between the two positive tabs 110 or the two negative tabs 120 between the first plate segment 410 and the second plate segment 420.

[0032] In this embodiment, four battery cells 10 are stacked sequentially, namely the first battery cell 10, the second battery cell 10, the third battery cell 10, and the fourth battery cell 10. Each of the four battery cells 10 has four positive tabs 110 and four negative tabs 120. Taking the positive tab side as an example, along the width direction of the battery cell 10, the first plate segment 410 of the adapter piece 50 is disposed between the positive tabs 110 of the first and second battery cells 10, and the second plate segment 420 is disposed between the positive tabs 110 of the third and fourth battery cells 10. A tab bending device is used to bend the positive tabs 110 of the first and second battery cells 10 towards the first plate segment 410 and stack them on the top surface of the first plate segment 410. The same tab bending device is used to bend the positive tabs 110 of the third and fourth battery cells 10 towards the second plate segment 420 and stack them on the top surface of the second plate segment 420.

[0033] like Figure 1 and Figure 2 As shown, the tab bending device includes two tab bending mechanisms for bending the positive tab 110 and negative tab 120 of the battery cell 10, respectively. The two tab bending mechanisms have the same structure, and the two tab bending mechanisms are used to bend the tabs on the corresponding side, that is, one tab bending mechanism is used to bend multiple positive tabs 110 on the positive tab side, and the other tab bending mechanism is used to bend multiple negative tabs 120 on the negative tab side.

[0034] This application employs two folding mechanisms to bend the positive electrode 110 and the negative electrode 120 respectively. The two folding mechanisms can perform bending operations independently and can adaptively perform the bending action of the corresponding positive electrode 110 or negative electrode 120 as needed, thereby improving the flexibility of use, making it more suitable for different application scenarios, and improving the user experience.

[0035] In this embodiment, the folding mechanism includes a driving component and folding plates 40. The driving component is disposed above the battery cell 10 and includes a first driving member 20 and a second driving member 30. The second driving member 30 is drivenly connected to the first driving member 20 and is used to drive the first driving member 20 to move along the length direction of the battery cell 10. The folding plates 40 are arranged in pairs and staggered along the length direction of the battery cell 10. The two driving ends of the first driving member 20 are drivenly connected to the top ends of the two folding plates 40 arranged in pairs. The first driving member 20 drives the two folding plates 40 to move closer to each other or further away from each other through the two driving ends. The bottom end of each folding plate 40 has two bent sections spaced apart along the width direction of the battery cell 10. The bent sections are parallel to the top surface of the battery cell 10. Along the width direction of the battery cell 10, a portion of the bent section of one folding plate 40 is disposed in the area between the two bent sections of the other folding plate 40.

[0036] The second driving component 30 is disposed above the first driving component 20 and is drivingly connected to the first driving component 20, and is used to drive the first driving component 20 to move along the length direction of the battery cell 10. The second driving component 30 is a cylinder or a motor.

[0037] In this embodiment, two pairs of folding plates 40 are misaligned along the length of the battery cell 10. When bending the tabs, one folding plate 40 is used to bend the tabs of the first and third battery cells 10 in the same direction and stack them on the top surface of the adapter plate 50; the other folding plate 40 is used to bend the tabs of the second and fourth battery cells 10 in the same direction and stack them on the top surface of the adapter plate 50. Since the bending directions of the second and third battery cells 10 are opposite, the two folding plates 40 move in opposite directions along the width of the battery cell 10, that is, they move closer to each other or further away from each other. Therefore, misaligning the two folding plates 40 along the length of the battery cell 10 can avoid interference between the two folding plates 40 under the drive of the first driving member 20, which would prevent the tabs from being bent.

[0038] Specifically, the first driving member 20 is driven to move the two folding plates 40, and the second driving member 30 is used to drive the first driving member 20 and the folding plates 40 to move synchronously.

[0039] The length direction of cell 10 is Figure 1 As shown in the X direction, the width direction of cell 10 is... Figure 1 As shown in the Y direction, the height direction of cell 10 is... Figure 1 The Z direction is shown.

[0040] The tab folding mechanism of this application adopts a structure in which a first driving member 20, a second driving member 30, and a folding plate 40 cooperate. The folding plate 40 is adjustable along the length and width directions of the cell 10. The bending section of the folding plate 40 is set to be parallel to the top surface of the cell 10. During the tab bending action, the folding plate 40 moves along the length direction of the cell 10 under the drive of the second driving member 30 until it fits against the side of the tab. In this process, the folding plate 40 corrects the position of the tab 110 to overcome the problem of tab tilt affecting the bending action in the prior art. At the same time, the first driving member 20 drives the folding plate 40 to move along the width direction of the cell 10 to bend the tab to the top surface of the adapter piece 50. The structure of this application avoids large redundancy at the root of the tab and reduces the phenomenon of battery scrap due to tab failure, thereby improving the tab bending efficiency and the yield of battery assembly.

[0041] In this embodiment, the driving end of the first driving member 20 is a guide plate 210. The two guide plates 210 are respectively connected to the two folding plates 40. Along the width direction of the cell 10, the first driving member 20 drives the two guide plates 210 to move closer or further away from each other. The structural arrangement of the guide plate 210 helps to ensure the accuracy of the movement of the folding plate 40 along the width direction of the cell 10, thereby ensuring the efficiency of the tab bending.

[0042] In one specific embodiment of this example, the first driving member 20 is a double-rod cylinder with telescopic output rods at both ends along the width direction of the battery cell 10. By using the structure of the double-rod cylinder, the two output rods are used to drive the two folding plates 40 to move synchronously, so as to move synchronously closer or further away from each other, so as to ensure that the bending action of the two folding plates 40 is carried out simultaneously.

[0043] In another specific embodiment of this invention, the first driving member 20 includes a driving member body and a screw. The driving member body is rotatably connected to the screw, and the guide rail plate 210 is rotatably sleeved on the screw. The internal threads of the two guide rail plates 210 have opposite directions of rotation. The driving member body is a rotary motor or a cylinder. The driving member body drives the screw to rotate, causing the two guide rail plates 210 to move closer or further apart, ensuring that the bending actions of the two folding plates 40 are performed simultaneously.

[0044] In this embodiment, each folding mechanism has two second driving members 30. The two second driving members 30 are arranged along the height direction of the battery cell 10. The upper second driving member 30 is driven to be connected to the lower second driving member 30, and the lower second driving member 30 is driven to be connected to the first driving member 20.

[0045] Specifically, the two second drive components 30 are unidirectional cylinders or motors with opposite stroke directions.

[0046] In this embodiment, the upper second driving member 30 is used to drive the lower second driving member 30 and the corresponding folding plate 40 to move along the length direction of the cell 10 to the area between the positive and negative tabs of the cell 10; the lower second driving member 30 is used to drive the folding plate 40 to move along the length direction of the cell 10 toward the tabs, and the folding plate 40 can be corrected during the movement.

[0047] Of course, the moving directions of the upper second driving member 30 and the lower second driving member 30 can be interchanged. That is, the lower second driving member 30 is used to drive the folding plate 40 to move along the length of the cell 10 to the area between the positive and negative tabs of the cell 10; the upper second driving member 30 is used to drive the lower second driving member 30 and the corresponding folding plate 40 to move along the length of the cell 10 toward the tabs. During the movement, the folding plate 40 can be corrected.

[0048] like Figure 1 and Figure 2 As shown, the folding plate 40 includes two first plate segments 410, a second plate segment 420, and a connecting plate segment 430. The two first plate segments 410 are spaced apart along the width direction of the battery cell 10, and both first plate segments 410 extend along the height direction of the battery cell 10. A second plate segment 420 is provided at the bottom end of each first plate segment 410. The second plate segment 420 is parallel to the top surface of the battery cell 10 and is the bending section. The top ends of the two first plate segments 410 are connected by the connecting plate segment 430. The driving end of the first driving member 20 is drivenly connected to the connecting plate segment 430.

[0049] The second plate segment 420 of the folding plate 40, i.e. the bent segment of the folding plate 40, is parallel to and spaced apart from the top surface of the battery cell 10, so as to facilitate the movement of the folding plate 40 along the length and width of the battery cell 10.

[0050] Specifically, the two second plate segments 420 are spaced apart along the width direction of the cell 10 to correspond to different tabs. When the first driving member 20 drives the folding plate 40 to move along the width direction of the cell 10, the two second plate segments 420 can simultaneously drive the two tabs to bend in the same direction. The tab bending mechanism of this application includes the arrangement of two folding plates 40, which is beneficial to improving the efficiency of tab bending.

[0051] In this application, along the length of the cell 10, the first plate segment 410 and the connecting plate segment 430 of one of the folding plates 40 are disposed on one side of the first plate segment 410 and the connecting plate segment 430 of the other folding plate 40. During use, the two folding plates 40 move closer to each other along the width of the cell 10 to bend the tabs. The first plate segment 410 and the connecting plate segment 430 of one folding plate 40 and the first plate segment 410 and the connecting plate segment 430 of the other folding plate 40 are arranged in a staggered structure, that is, a non-coplanar arrangement structure, so that they will not interfere with each other during movement.

[0052] The structure in which the two folding plates 40 are staggered along the length of the cell 10 can avoid interference between the two folding plates 40 under the drive of the first driving member 20, thus preventing the phenomenon of being unable to bend the tabs.

[0053] In this embodiment, a portion of the bending segment of one of the folding plates 40 along the width direction of the cell 10 is disposed in the area between the two bending segments of the other folding plate 40. Different bending segments correspond to different tabs. The four bending segments of the two folding plates 40 in this application correspond one-to-one to the four tabs. The tabs can be the positive tab 110 on the positive tab side or the negative tab 120 on the negative tab side. The bending segments of the two folding plates 40 have a structure that is intersected along the width direction of the cell 10, so as to realize that the first and third tabs arranged sequentially along the width direction of the cell 10 are bent in the same direction, and the second and fourth tabs are bent in the same direction, thereby ensuring that the bending directions of the first and second tabs are opposite and both are superimposed on the top surface of the adapter piece 50, and the bending directions of the third and fourth tabs are opposite and both are superimposed on the top surface of the adapter piece 50.

[0054] The second plate segments 420 of the two folding plates 40 overlap along the width direction of the cell 10 to facilitate the first driving member 20 and the second driving member 30 to drive the two folding plates 40 to move. It also facilitates that when the two folding plates 40 are in the first position, both folding plates 40 are in the area between the positive electrode tab 110 and the negative electrode tab 120.

[0055] In this embodiment, the connecting plate segment 430 is parallel to the top surface of the battery cell 10, the two first plate segments 410 are symmetrical about the connecting plate segment 430, and the two second plate segments 420 are symmetrical about the connecting plate segment 430.

[0056] like Figure 1 and Figure 2 As shown, the driving component of this application also includes a third driving member 60, which is disposed above the second driving member 30. The third driving member 60 is drivingly connected to the second driving member 30 and is used to provide driving force for the second driving member 30 to move along the height direction of the cell 10.

[0057] The third driving component 60 is a motor. The third driving component 60 drives the second driving component 30, the first driving component 20 and the folding plate 40 to move along the height direction of the battery cell 10, so that the bent section of the folding plate 40 moves to the position of the top surface of the battery cell 10, so as to cooperate with the battery cell 10.

[0058] In this embodiment, the folding plate 40 has switchable first, second and third positions. When the folding plate 40 is in the first position, the two bent sections of the folding plate 40 along the length direction of the cell 10 are disposed between the positive tab 110 and the negative tab 120. When the folding plate 40 is in the second position, the two bent sections of the folding plate 40 are in contact with the side of the positive tab 110 or the negative tab 120. When the folding plate 40 is in the third position, the two bent sections of the folding plate 40 press against the positive tab 110 or the negative tab 120 and are stacked on the top surface of the adapter piece 50.

[0059] During use, the two folding mechanisms first move the second driving member 30, the first driving member 20 and the bending member towards the top surface of the cell 10 through the third driving member 60, so that the folding plate 40 is in the first position. Then, the second driving member 30 adjusts the folding plate 40 to switch to the second position, and the first driving member 20 drives the folding plate 40 to switch from the second position to the third position to complete the tab bending.

[0060] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0061] The tab bending device of this application adopts a structure in which a first driving member 20, a second driving member 30 and a bending plate 40 cooperate. The bending plate 40 is adjustable along the length and width directions of the cell 10. The bending section of the bending plate 40 is set to be parallel to the top surface of the cell 10. When the tab is bent, the bending plate 40 moves along the length direction of the cell 10 under the drive of the second driving member 30 until it is in contact with the side of the tab. During this process, the bending plate 40 has the function of correcting the position of the tab 110, so as to overcome the problem of the tab tilt affecting the bending action in the prior art.

[0062] The first driving component 20 of this application drives the bending plate 40 to move along the width direction of the cell 10 to bend the tab to the top surface of the adapter piece 50. The structural design of this application avoids large redundancy at the root of the tab and reduces the phenomenon of battery scrap due to tab failure, thereby improving the tab bending efficiency and improving the yield of battery assembly.

[0063] This application employs two folding mechanisms to bend the positive electrode 110 and the negative electrode 120 respectively. The two folding mechanisms can perform bending operations independently and can adaptively perform the bending action of the corresponding positive electrode 110 or negative electrode 120 as needed, thereby improving the flexibility of use, making it more suitable for different application scenarios, and improving the user experience.

[0064] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tab bending device, characterized in that, The electrode bending device includes two bending mechanisms for bending the positive electrode (110) and negative electrode (120) of the battery cell (10), respectively. The bending mechanism includes: A driving assembly is disposed above the battery cell (10). The driving assembly includes a first driving member (20) and a second driving member (30). The second driving member (30) is drivingly connected to the first driving member (20) and is used to drive the first driving member (20) to move along the length direction of the battery cell (10). The folding plates (40) are arranged in pairs and staggered along the length direction of the battery cell (10). The two driving ends of the first driving member (20) are respectively driven connected to the top ends of the two folding plates (40) arranged in pairs. The bottom end of each folding plate (40) has two bent segments spaced apart along the width direction of the battery cell (10). The bent segments are parallel to the top surface of the battery cell (10). Along the width direction of the battery cell (10), a portion of the bent segment of one of the folding plates (40) is located in the area between the two bent segments of the other folding plate (40).

2. The electrode bending device according to claim 1, characterized in that, The folding plate (40) includes: Two first plate segments (410) are spaced apart along the width direction of the battery cell (10), and both first plate segments (410) extend along the height direction of the battery cell (10); The second plate segment (420) is provided at the bottom end of each of the first plate segments (410). The second plate segment (420) is parallel to the top surface of the battery cell (10). The bending section is the second plate segment (420). The top ends of the two first plate segments (410) are connected through the connecting plate segment (430), and the driving end of the first driving member (20) is drivenly connected to the connecting plate segment (430).

3. The electrode bending device according to claim 2, characterized in that, Along the length direction of the cell (10), the first plate segment (410) of one of the folding plates (40) and the connecting plate segment (430) are disposed on one side of the first plate segment (410) and the connecting plate segment (430) of the other folding plate (40); The second plate segments (420) of the two folding plates (40) overlap in the projection portion along the width direction of the cell (10).

4. The electrode bending device according to claim 2, characterized in that, The connecting plate segment (430) is parallel to the top surface of the battery cell (10). The two first plate segments (410) are symmetrical about the connecting plate segment (430); and / or The two second plate segments (420) are symmetrical about the connecting plate segment (430).

5. The electrode bending device according to claim 1, characterized in that, The driving end of the first driving member (20) is a guide plate (210). The two guide plates (210) are respectively connected to the two folding plates (40). Along the width direction of the battery cell (10), the first driving member (20) drives the two guide plates (210) to move closer to or further away from each other.

6. The electrode bending device according to claim 5, characterized in that, The first driving member (20) is a double-rod cylinder with telescopic output rods at both ends along the width direction of the battery cell (10); or The first driving component (20) includes a driving component body and a screw. The driving component body is rotatably connected to the screw. The guide plate (210) is rotatably sleeved on the screw. The internal threads of the two guide plates (210) have opposite directions of rotation.

7. The electrode tab bending device according to claim 1, characterized in that, The driving component also includes: A third driving member (60) is disposed above the second driving member (30). The third driving member (60) is drivingly connected to the second driving member (30). The third driving member (60) is used to provide driving force for the second driving member (30) to move along the height direction of the cell (10).

8. The tab bending device according to any one of claims 1 to 7, characterized in that, Each of the folding ear mechanisms has two second driving members (30). The two second driving members (30) are arranged along the height direction of the battery cell (10). The upper second driving member (30) is driven to connect with the lower second driving member (30), and the lower second driving member (30) is driven to connect with the first driving member (20).

9. The tab bending device according to any one of claims 1 to 7, characterized in that, The folding plate (40) has switchable first, second and third positions. When the folding plate (40) is in the first position, the two bent sections of the folding plate (40) along the length direction of the battery cell (10) are disposed between the positive electrode (110) and the negative electrode (120). When the folding plate (40) is in the second position, the two bent sections of the folding plate (40) are in contact with the side of the positive electrode (110) or the negative electrode (120). When the folding plate (40) is in the third position, the two bent sections of the folding plate (40) press against the positive electrode (110) or the negative electrode (120) and are stacked on the top surface of the adapter piece (50).

10. A battery manufacturing apparatus, characterized in that, The battery manufacturing equipment includes the tab bending device according to any one of claims 1 to 9.

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