Bending mechanism and battery production equipment

Abstract

The utility model discloses a bending mechanism and battery production equipment. The bending mechanism comprises a fixing piece, a first bending piece and a second bending piece. The fixing piece is suitable for being connected with a base. The first bending piece is connected to the fixing piece in a sliding mode in the first direction. The second bending piece is connected to the fixing piece in a sliding mode in the second direction; wherein the first bending piece can push one end, far away from the cover cap, of the tab to be bent, and the second bending piece can push the cover cap to rotate towards the battery shell, so that one end, close to the cover cap, of the tab is bent. The bending mechanism can be modularly arranged, so that the bending mechanism can be integrally mounted on the base, or the bending mechanism can be integrally detached from the base for maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production equipment technical field more specifically, relate to a kind of bending mechanism and battery production equipment. BACKGROUND

[0002] In the related art, in the production process of cylindrical battery, the tab and the battery shell, the cap and the tab are sequentially welded, and the central axis of the cap after welding is perpendicular to the central axis of the battery shell, so the tab needs to be bent to facilitate the cap to be buckled into the battery shell. At present, the tab is generally bent by a bending mechanism, and the structure of the current bending mechanism is complex, and the dispersion degree of each component is high, and installation, disassembly or maintenance is relatively inconvenient.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. UTILITY MODEL CONTENT

[0004] One object of the utility model is to provide a new technical solution for a bending mechanism.

[0005] According to the first aspect of the utility model, a bending mechanism is provided. The bending mechanism comprises:

[0006] a fixing member adapted to be connected to the base;

[0007] a first bending member slidably connected to the fixing member in a first direction;

[0008] a second bending member slidably connected to the fixing member in a second direction;

[0009] Wherein, the first bending member can push the tab to bend away from one end of the cap, and the second bending member can push the cap to rotate towards the battery shell to bend the end of the tab close to the cap.

[0010] Optionally, the bending mechanism further comprises a first connecting member mounted on the fixing member, the first bending member is in transmission connection with the first connecting member, and the first connecting member can drive the first bending member to slide.

[0011] Optionally, one of the first connecting member and the first bending member is provided with a pushing part, and the other is provided with a guide groove, the pushing part can move along the guide groove to drive the first bending member to slide.

[0012] Optionally, the first connecting member is slidably connected to the fixing member in the second direction, the guide groove is arranged in a third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°.

[0013] Optionally, the first bending member comprises a bending portion, the bending portion is suitable for pushing the tab, and the bending portion is in a sheet structure.

[0014] Optionally, the second bending member is provided with a limiting portion, and the limiting portion is capable of abutting against a side of the battery shell which is away from the first bending member.

[0015] Optionally, the battery production device further comprises a bearing member and a first elastic member, the bearing member is suitable for placing the battery shell, and the first elastic member has a tendency of driving the first bending member to move towards the bearing member.

[0016] Optionally, the battery production device further comprises a driving assembly, and the driving assembly is capable of driving the first bending member and the second bending member to slide, respectively.

[0017] Optionally, the driving assembly comprises a cam structure, the cam structure is provided with a first guide rail and a second guide rail, the first bending member is capable of moving along the first guide rail, and the second bending member is capable of moving along the second guide rail.

[0018] According to another aspect of the present application, a battery production device is provided. The battery production device comprises the bending mechanism described in the above embodiments.

[0019] One technical effect of the present application is that the bending mechanism comprises a fixing member, a first bending member and a second bending member, the first bending member is slidably connected to the fixing member along a first direction, the second bending member is slidably connected to the fixing member along a second direction, and the fixing member is capable of being connected to a base. The bending mechanism of the present application can be modularly arranged, so that the bending mechanism can be conveniently installed on the base as a whole, or the bending mechanism can be conveniently removed from the base as a whole for maintenance.

[0020] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 is a structural schematic view of the bending mechanism of one embodiment of the present application.

[0023] Figure 2 is a side view of the bending mechanism of one embodiment of the present application.

[0024] Figure 3 is a flowchart schematic view of the bending mechanism bending the tab of one embodiment of the present application.

[0025] Figure 4is a partial structural schematic view of a cam structure of one embodiment of the present application.

[0026] Figure 5 is a side view of a cam structure of one embodiment of the present application.

[0027] Figure 6 is a structural schematic view of a battery production apparatus of one embodiment of the present application.

[0028] Reference Signs:

[0029] 1, bending mechanism; 11, fixing piece; 111, first sliding rail; 12, first bending piece; 121, guide groove; 122, bending part; 13, second bending piece; 131, limiting part; 132, pressing part; 14, first connecting piece; 141, pushing part; 15, bearing piece; 16, cam structure; 161, first guide rail; 162, second guide rail; 2, base; 3, battery shell; 4, tab; 5, cap; 6, rotating shaft; 8, first follower; 9, second follower. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. If desired, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and numerical values set forth can not limit the scope of the present application, unless otherwise specified.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application and its applications or uses.

[0032] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered within the scope of the present disclosure.

[0033] In all of the examples shown and discussed herein, any specific values should be interpreted as illustrative only and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0034] It should be noted that like reference numerals and letters refer to like items throughout the attached drawings, and thus, once an item is defined in one drawing, it is not necessary to discuss it further in subsequent drawings.

[0035] According to one embodiment of the present application, a bending mechanism is provided. As shown in FIG. 1, the bending mechanism includes a base 2, a battery shell 3, a tab 4, a cap 5, a rotating shaft 6, a first follower 8, a second follower 9, a first bending piece 12, a second bending piece 13, a first connecting piece 14, a pushing part 141, a bearing piece 15, and a cam structure 16. Figures 1 to 3As shown, the bending mechanism 1 comprises a fixing member 11, a first bending member 12 and a second bending member 13. The fixing member 11 is adapted to be connected with the base 2. The first bending member 12 is slidingly connected with the fixing member 11 along a first direction. The second bending member 13 is slidingly connected with the fixing member 11 along a second direction. The first bending member 12 is capable of pushing the tab 4 to bend away from one end of the cap 5. The second bending member 13 is capable of pushing the cap 5 to rotate towards the battery shell 3, so that the tab 4 is bent close to one end of the cap 5.

[0036] As shown in the example, Figure 3 the bending mechanism 1 comprises a fixing member 11, a first bending member 12 and a second bending member 13. The first bending member 12 is slidingly connected with the fixing member 11 along a first direction. The second bending member 13 is slidingly connected with the fixing member 11 along a second direction. The fixing member 11 is capable of being connected with the base 2. For example, the base 2 can be fixedly connected with the base 2 by means of fasteners such as screws or bolts. When installing, the fixing member 11 can be installed on the base 2, which is convenient. When disassembling, the fixing member 11 can be disassembled from the base 2, and the bending mechanism 1 can be disassembled as a whole. The bending mechanism 1 can be modularly arranged, so that the bending mechanism 1 can be conveniently installed on the base 2 as a whole, or the bending mechanism 1 can be disassembled from the base 2 as a whole for maintenance.

[0037] As shown in the example, Figure 3 in this example, one end of the tab 4 is welded to the battery shell 3, and the other end is welded to the cap 5. The first bending member 12 is capable of sliding along the first direction and moving towards the tab 4, and is capable of pushing the tab 4 to bend away from one end of the cap 5. The second bending member 13 is capable of abutting against the cap 5 and pushing the cap 5 to rotate towards the battery shell 3, so that the tab 4 is bent close to one end of the cap 5. Meanwhile, the other end of the tab 4 away from the cap 5 can be further bent, so as to facilitate the subsequent pressing of the cap 5 into the battery shell 3.

[0038] As shown in the example, Figure 1 and Figure 2 in this example, the second direction can be a vertical direction, and the second bending member 13 is capable of moving downwards to press the cap 5. The first direction can be inclined relative to the horizontal plane, and the first bending member 12 gradually inclines upwards from one end close to the first bending member 12 to the other end, i.e., the included angle between the first direction and the second direction is less than 90°. Thus, the first bending member 12 can push the tab 4 to bend downwards on the upper side of the tab 4, so as to enable the bending part 122 of the second bending member 13 to avoid the upper end of the battery shell 3, thereby better bending the tab 4. Of course, the specific value of the included angle between the first direction and the second direction can be determined by the person skilled in the art according to the actual situation, which is not limited herein.

[0039] As shown in Figure 1 In this example, the first slide rail 111 is arranged on the fixing member 11 along the second direction, and the second bending member 13 is provided with a sliding block part which is slidingly connected to the first slide rail 111, so as to be able to slide along the second direction on the first slide rail 111. In addition, the second slide rail can also be arranged on the fixing member 11 along the first direction, and the second bending member 13 can be slidingly connected to the second slide rail.

[0040] In one example, as shown in Figure 1 and Figure 2 The bending mechanism 1 further comprises a first connecting member 14 which is mounted on the fixing member 11, the first bending member 12 is drivingly connected to the first connecting member 14, and the first connecting member 14 can drive the first bending member 12 to slide.

[0041] As shown in Figure 1 and Figure 2 In this example, the first connecting member 14 is mounted on the fixing member 11, and the first connecting member 14 is drivingly connected to the first bending member 12. One end of the first connecting member 14 can be drivingly connected to the driving assembly, so that the driving assembly can drive the first bending member 12 to slide along the first direction on the fixing member 11 through the first connecting member 14.

[0042] In one example, as shown in Figure 1 and Figure 2 One of the first connecting member 14 and the first bending member 12 is provided with a pushing part 141, and the other is provided with a guide groove 121, the pushing part 141 can move along the guide groove 121, so as to drive the first bending member 12 to slide.

[0043] As shown in Figure 1 and Figure 2 In this example, one end of the first connecting member 14 is provided with a pushing part 141, and the first bending member 12 is provided with a guide groove 121, and the pushing part 141 is movably arranged in the guide groove 121. The first connecting member 14 is slidingly mounted on the fixing member 11, and by sliding the first connecting member 14, the pushing part 141 can be driven to slide along the guide groove 121, so as to drive the first bending member 12 to slide along the first direction.

[0044] Alternatively, one end of the first bending member 12 is provided with a pushing part 141, and the first connecting member 14 is provided with a guide groove 121, and the pushing part 141 is movably arranged in the guide groove 121. The first connecting member 14 is slidingly mounted on the fixing member 11, and by sliding the first connecting member 14, the pushing part 141 can also be driven to slide in the guide groove 121, so as to drive the first bending member 12 to slide along the first direction.

[0045] Of course, the specific arrangement of the pushing part 141 and the guide slot 121 can be determined by the actual situation, and is not specifically limited here.

[0046] In one example, as shown in Figure 1 and Figure 2 , the first connecting piece 14 is slidingly connected to the fixed piece 11 along the second direction, the guide slot 121 is arranged along the third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°.

[0047] In this example, the second bending piece 13 slides along the second direction, and the first connecting piece 14 is slidingly connected to the fixed piece 11 along the second direction, thereby facilitating the rational use of the installation space of the fixed piece 11.

[0048] As shown in Figure 1 and Figure 2 , the guide slot 121 is arranged on the first bending piece 12, and the pushing part 141 is arranged on the first connecting piece 14. The first direction is arranged obliquely relative to the horizontal plane, the guide slot 121 is arranged along the third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°, so that when the first connecting piece 14 moves upward, the first bending piece 12 can be pulled to slide along the first direction and gradually move away from the second bending piece 13. When the first connecting piece 14 slides downward, the first bending piece 12 can be pushed to slide along the first direction and gradually approach the second bending piece 13 to bend the tab 4 in cooperation with the second bending piece 13.

[0049] For example, the included angle between the second direction and the third direction can be 60°, 80°, 90°, or 120°, etc. The skilled person can determine it according to the actual situation, and it is not specifically limited here.

[0050] Among them, the fixed piece 11 is also provided with a third sliding rail along the second direction, which can be located on one side of the first sliding rail 111, and the first connecting piece 14 can be slidingly connected to the third sliding rail and can slide along the third sliding rail.

[0051] Among them, in this example, the pushing part 141 can be a roller shaft, which is rotatably arranged on the first connecting piece 14, and the first bending piece 12 is correspondingly provided with a guide slot 121, the roller shaft is located in the guide slot 121 and can roll along the inner wall of the guide slot 121, thereby improving the smoothness of the movement of the first connecting piece 14 driving the first bending piece 12.

[0052] In one example, as shown in Figure 1 and Figure 2 , the first bending piece 12 includes a bending part 122, which is suitable for pushing the tab 4, and the bending part 122 is in a sheet structure.

[0053] As Figure 1 and Figure 2 shown, in this example, one side of the first bending member 12 is provided with a bending portion 122, the bending member is in a sheet structure, and the bending portion 122 can correspond to the width of the tab 4, for example, the width of the bending portion 122 is equal to the width of the tab 4, or the width of the bending portion 122 is slightly greater than the width of the tab 4. So that the bending portion 122 can uniformly push the tab 4 to bend when pushing the tab 4 to bend, and the tab 4 can be prevented from twisting during the bending process.

[0054] In one example, as Figures 1 to 3 shown, the second bending member 13 is provided with a limiting portion 131, which can abut against the side of the battery shell 3 away from the first bending member 12.

[0055] As Figures 1 to 3 shown, in this example, when the first bending member 12 bends the tab 4, the limiting portion 131 can abut against the side of the battery shell 3 away from the first bending member 12, thereby being able to limit the battery shell 3. That is, when the bending portion 122 pushes the tab 4 to bend, the limiting portion 131 can abut against the side of the battery shell 3 away from the bending portion 122, thereby being able to prevent the bending portion 122 from pushing the battery shell 3 to deviate, which is beneficial to improve the bending effect on the tab 4.

[0056] As Figure 3 shown, in this example, the second bending member 13 is also provided with a pressing portion 132, which is located above the limiting portion 131. The process of bending the tab 4 by the first bending member 12 and the second bending member 13 includes: fixing the battery shell 3 to the carrier 15, and moving the second bending member 13 in the second direction and towards the battery shell 3, for example, moving the second bending member 13 downward, so that the limiting portion 131 can abut against the side of the battery shell 3 away from the first bending member 12. Then, the first bending member 12 can move towards the tab 4, so that the bending portion 122 can abut against one side of the tab 4 and push the tab 4 away from one end of the cap 5 to bend. After the tab 4 is bent to the preset position, the pressing portion 132 can press the cap 5 to further push the tab 4 to bend. When the bending of the tab 4 is completed, the first bending member 12 and the second bending member 13 move away from the tab 4 respectively, so as to increase the space between the first bending member 12 and the second bending member 13, thereby facilitating subsequent feeding operations.

[0057] In one example, the bending mechanism 1 further comprises a carrier 15 and a first elastic member, the carrier 15 is suitable for placing the battery shell 3, and the first elastic member has a tendency to move the first bending member 12 towards the carrier 15.

[0058] In this example, the first elastic member can act on the first connecting member 14, and the first elastic member has a tendency to push the first connecting member 14 to move downward. For example, the first elastic member can be a compression spring, one end of the compression spring abuts against the fixed member 11, the other end abuts against the first connecting member 14, and the compression spring can push the first connecting member 14 to move downward, thereby driving the first bending member 12 to move towards the bearing member 15, i.e., driving the bending part 122 of the first bending member 12 to move towards the tab 4 to bend the tab 4. Alternatively, the first elastic member can also directly act on the first bending member 12 to drive the first bending member 12 to move towards the tab 4 in the first direction.

[0059] For example, the bearing member 15 can be a cup, and the battery shell 3 can be arranged in the cup, and the cup can be placed on the base 2.

[0060] In one example, the bending mechanism 1 further comprises a second elastic member, and the second elastic member can act on the second bending member 13, and the second elastic member has a tendency to push the second bending member 13 to move downward. For example, the second elastic member can be a compression spring, one end of the compression spring abuts against the fixed member 11, the other end abuts against the second bending member 13, and the compression spring can push the second bending member 13 to move downward, thereby driving the second bending member 13 to move towards the bearing member 15, i.e., driving the pressing part 132 to move towards the cap 5 to press the cap 5.

[0061] In one example, the bending mechanism 1 further comprises a driving assembly, and the driving assembly can drive the first bending member 12 and the second bending member 13 to slide, respectively.

[0062] In this example, the first bending member 12 is slidably arranged on the fixed member 11, and the driving assembly can drive the first bending member 12 to move towards the tab 4 in the first direction to perform the bending operation. The driving assembly can also drive the first bending member 12 to move away from the tab 4 to increase the space between the first bending member 12 and the second bending member 13, thereby facilitating the feeding of the battery shell 3.

[0063] Alternatively, the second bending member 13 is slidably arranged on the fixed member 11, and the driving assembly can simultaneously drive the first bending member 12 and the second bending member 13 to move.

[0064] In one example, as shown in Figure 4 and Figure 5 , the driving assembly comprises a cam structure 16, and the cam structure 16 is provided with a first guide rail 161 and a second guide rail 162, and the first bending member 12 can move along the first guide rail 161, and the second bending member 13 can move along the second guide rail 162.

[0065] As shown in Figure 1 , Figure 4 andFigure 5 As shown, in this example, the drive assembly also includes a first follower 8. For example, the first follower 8 can be a cylindrical wheel, and the first follower 8 can be rotatably connected to the first connector 14. The first follower 8 can move along the first guide rail 161, which is curved so that when the first follower 8 rolls along the first guide rail 161, it can move relative to the first follower 8 in a second direction. For example, the first follower 8 can roll upward or downward along the first guide rail 161, thereby driving the first connector 14 to slide on the fixing member 11 in the second direction.

[0066] The drive assembly also includes a second follower 9, which may be a cylindrical wheel and is rotatably connected to one end of the second bent member 13. The second follower 9 is movable along the second guide rail 162, which is curved so that when the second follower 9 rolls along the second guide rail 162, it can move relative to the second guide rail in a second direction. For example, the second follower 9 can roll upward or downward along the second guide rail 162, thereby driving the second bent member 13 to slide on the fixed member 11 in a second direction.

[0067] like Figure 5 and Figure 6 As shown, in this example, a rotating shaft 6 is also provided on the base 2. The first guide rail 161 and the second guide rail 162 can be annular structures, with the first guide rail 161 located above the second guide rail 162. The first guide rail 161 and the second guide rail 162 are sleeved on the outside of the rotating shaft 6. The rotating shaft 6 is connected to the fixing member 11 for transmission, so that the rotating shaft 6 can drive the fixing member 11 to rotate around the first guide rail 161 and the second guide rail 162, so that the first follower 8 can roll along the first guide rail 161 and the second follower 9 can roll along the second guide rail 162.

[0068] In this example, by setting the positions of the bent sections of the first guide rail 161 and the second guide rail 162, the first guide rail 161 and the second guide rail 162 can cooperate with each other, thereby enabling the first bending member 12 and the second bending member 13 to move synchronously. For example, when bending the tab 4, the bending part 122 moves towards the tab 4, while the limiting part 131 can move towards the battery casing 3. After the tab 4 is bent, the bending part 122 and the limiting part 131 can move away synchronously, which helps to improve bending efficiency.

[0069] Alternatively, the drive component can be an electric cylinder or a pneumatic cylinder, etc. Those skilled in the art can determine the appropriate method based on the specific circumstances, and no specific limitations are made here.

[0070] According to another embodiment of this application, a battery manufacturing apparatus is provided. For example... Figures 1 to 6As shown, the battery production equipment comprises the bending mechanism 1 described in the above embodiments. The bending mechanism 1 comprises a fixing member 11, a first bending member 12 and a second bending member 13. The fixing member 11 is adapted to be connected with the base 2. The first bending member 12 is slidingly connected with the fixing member 11 along a first direction. The second bending member 13 is slidingly connected with the fixing member 11 along a second direction. The first bending member 12 is capable of pushing the tab 4 to bend away from one end of the cap 5, and the second bending member 13 is capable of pushing the cap 5 to rotate towards the battery shell 3 so as to bend the tab 4 to be close to one end of the cap 5. The fixing member 11 can be connected with the base 2, for example, the base 2 can be fixedly connected with the base 2 by screws or bolts and the like. When installing, the fixing member 11 can be installed on the base 2, which is convenient. When disassembling, the fixing member 11 can be disassembled from the base 2, and the bending mechanism 1 can be disassembled as a whole. The bending mechanism 1 can be modularly arranged, so that the bending mechanism 1 can be installed on the base 2 as a whole, or the bending mechanism 1 can be disassembled from the base 2 as a whole for maintenance.

[0071] In this example, the battery production equipment further comprises a base 2, and the bending mechanism 1 is installed on the base 2. The fixing member 11 can be provided in plurality, and the plurality of fixing members 11 are arranged along the circumference of the rotating shaft 6. Each fixing member 11 is provided with the first bending member 12 and the second bending member 13, so that a plurality of workpieces to be bent can be continuously bent to improve the bending efficiency.

[0072] The above embodiments mainly describe the differences between the embodiments, and the different optimization features of the embodiments can be combined to form a better embodiment without contradiction. Considering the brevity of the text, the details are not repeated here.

[0073] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A bending mechanism characterized by comprising: The utility model relates to a bending mechanism for battery, comprising: a fixing part suitable for connecting with a base; a first bending part slidingly connected with the fixing part along a first direction; a second bending part slidingly connected with the fixing part along a second direction; wherein the first bending part can push the tab to bend at one end away from the cap, and the second bending part can push the cap to rotate towards the battery shell to make the tab bend at one end close to the cap.

2. The folding mechanism of claim 1, wherein Further comprising a first connecting part installed on the fixing part, the first bending part is in transmission connection with the first connecting part, and the first connecting part can drive the first bending part to slide.

3. The bending mechanism according to claim 2, wherein One of the first connecting part and the first bending part is provided with a pushing part, and the other is provided with a guide groove, the pushing part can move along the guide groove to drive the first bending part to slide.

4. The bending mechanism according to claim 3, wherein The first connecting part is slidingly connected with the fixing part along the second direction, the guide groove is arranged along a third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°.

5. The folding mechanism of claim 1, wherein The first bending part comprises a bending part suitable for pushing the tab, and the bending part is in a sheet structure.

6. The bending mechanism of claim 1, wherein The second bending part is provided with a limiting part capable of abutting against the side of the battery shell away from the first bending part.

7. The bending mechanism of claim 1, wherein Further comprising a bearing part suitable for placing the battery shell and a first elastic part having a tendency to drive the first bending part to move towards the bearing part.

8. The bending mechanism of claim 1, wherein Further comprising a driving assembly capable of driving the first bending part and the second bending part to slide respectively.

9. The bending mechanism of claim 8, wherein, The driving assembly comprises a cam structure provided with a first guide rail and a second guide rail, the first bending part can move along the first guide rail, and the second bending part can move along the second guide rail.

10. A battery production apparatus, characterized by comprising: The utility model relates to a bending mechanism for battery, comprising: a fixing part suitable for connecting with a base; a first bending part slidingly connected with the fixing part along a first direction; a second bending part slidingly connected with the fixing part along a second direction; wherein the first bending part can push the tab to bend at one end away from the cap, and the second bending part can push the cap to rotate towards the battery shell to make the tab bend at one end close to the cap. Further comprising a first connecting part installed on the fixing part, the first bending part is in transmission connection with the first connecting part, and the first connecting part can drive the first bending part to slide. One of the first connecting part and the first bending part is provided with a pushing part, and the other is provided with a guide groove, the pushing part can move along the guide groove to drive the first bending part to slide. The first connecting part is slidingly connected with the fixing part along the second direction, the guide groove is arranged along a third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°. The first bending part comprises a bending part suitable for pushing the tab, and the bending part is in a sheet structure. The second bending part is provided with a limiting part capable of abutting against the side of the battery shell away from the first bending part. Further comprising a bearing part suitable for placing the battery shell and a first elastic part having a tendency to drive the first bending part to move towards the bearing part. Further comprising a driving assembly capable of driving the first bending part and the second bending part to slide respectively. The driving assembly comprises a cam structure provided with a first guide rail and a second guide rail, the first bending part can move along the first guide rail, and the second bending part can move along the second guide rail. The utility model relates to a bending mechanism for battery, comprising: a fixing part suitable for connecting with a base; a first bending part slidingly connected with the fixing part along a first direction; a second bending part slidingly connected with the fixing part along a second direction; wherein the first bending part can push the tab to bend at one end away from the cap, and the second bending part can push the cap to rotate towards the battery shell to make the tab bend at one end close to the cap. Further comprising a first connecting part installed on the fixing part, the first bending part is in transmission connection with the first connecting part, and the first connecting part can drive the first bending part to slide. One of the first connecting part and the first bending part is provided with a pushing part, and the other is provided with a guide groove, the pushing part can move along the guide groove to drive the first bending part to slide. The first connecting part is slidingly connected with the fixing part along the second direction, the guide groove is arranged along a third direction, and the included angle between the second direction and the third direction is greater than 0° and less than 180°. The first bending part comprises a bending part suitable for pushing the tab, and the bending part is in a sheet structure. The second bending part is provided with a limiting part capable of abutting against the side of the battery shell away from the first bending part. Further comprising a bearing part suitable for placing the battery shell and a first elastic part having a tendency to drive the first bending part to move towards the bearing part. Further comprising a driving assembly capable of driving the first bending part and the second bending part to slide respectively. The driving assembly comprises a cam structure provided with a first guide rail and a second guide rail, the first bending part can move along the first guide rail, and the second bending part can move along the second guide rail. The utility model relates to a bending mechanism for battery, comprising:

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