Edge folding equipment

Abstract

The utility model relates to edge folding equipment. The edge folding equipment comprises a battery cell stabilizing mechanism, a limiting mechanism and a folding knife mechanism, the battery cell stabilizing mechanism comprises a supporting piece and a downward pressing mechanism arranged above the supporting piece, and the downward pressing mechanism is used for pressing a battery cell to be subjected to edge folding on the supporting piece in the thickness direction of the battery cell; the limiting mechanism comprises two limiting blocks capable of moving relatively, and the two limiting blocks are arranged on the two transverse sides of the supporting piece respectively and used for abutting against the two opposite side edges of the battery cell; the folding knife mechanism comprises a knife head assembly capable of moving in the direction away from or close to the battery cell, the end, facing the battery cell, of the knife head assembly is provided with a limiting part and an angle folding part, the limiting part is used for making contact with the limiting block, and the angle folding part is used for making contact with the top sealing edge of the battery cell and folding the top sealing edge to a set angle. According to the scheme provided by the invention, the angle folding consistency and the angle folding precision can be improved.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to folding equipment. Background Technology

[0002] Soft-pack batteries are the third generation of lithium batteries developed based on the original steel-cased, aluminum-cased, and plastic-cased batteries. They are widely favored by users at home and abroad for their advantages such as being lighter and thinner, having better safety performance, high appearance requirements, high energy density, stable discharge platform, excellent power performance, and being environmentally friendly and pollution-free.

[0003] In related technologies, the aluminum-plastic film folding of soft-pack battery cells mostly relies on manual labor or semi-automated equipment, which presents the following technical bottlenecks: First, manual operation depends on experience-based adjustments, which can easily lead to positioning deviations causing the starting point of the aluminum-plastic film folding to shift, resulting in wrinkles or tears, affecting the accuracy of the folding angle and product yield. Second, the high springback rate of the aluminum-plastic film after folding leads to poor folding consistency. In addition, the diverse sizes of battery cells require equipment with rapid adaptability, while traditional mechanical limiting structures are cumbersome to adjust, have poor compatibility, are time-consuming to changeover, and have low production efficiency.

[0004] Therefore, the folding equipment in related technologies has poor folding consistency and low folding accuracy. Utility Model Content

[0005] To solve or partially solve the problems existing in the related technologies, this application provides a folding device that can improve the consistency and accuracy of folding angles.

[0006] This application provides a folding device, comprising:

[0007] A cell stabilization mechanism includes a support member and a pressing mechanism disposed above the support member. The pressing mechanism is used to press the cell to be folded along the thickness direction of the cell against the support member.

[0008] The limiting mechanism includes two relatively movable limiting blocks, which are respectively disposed on the lateral sides of the support member and are used to abut against the two opposite sides of the battery cell.

[0009] The folding mechanism includes a blade assembly that can move away from or towards the battery cell. The end of the blade assembly facing the battery cell is provided with a limiting part and a folding part. The limiting part is used to contact the limiting block, and the folding part is used to contact the top sealing edge of the battery cell to fold the top sealing edge to a set angle.

[0010] In one embodiment, the support member has a support surface for placing the battery cell, and the pressing mechanism includes a first driving member and a pressing block that is pulsatorically connected to the first driving member. The first driving member is used to drive the pressing block to move away from or towards the support surface.

[0011] In one embodiment, the support surface and / or the pressure block are provided with adsorption holes, which are connected to a vacuum device and are used to adsorb the battery cell.

[0012] In one embodiment, a moving mechanism is further included, wherein the pressing mechanism is connected to the moving mechanism, and the moving mechanism is used to drive the pressing mechanism to move; wherein the moving mechanism moves along a first horizontal direction, the limiting block of the limiting mechanism moves along a second horizontal direction, the first horizontal direction and the second horizontal direction are perpendicular to each other and parallel to the extension directions of the two adjacent sides of the battery cell, respectively.

[0013] In one embodiment, the limiting block is a heating block, which is used to heat the folded edges at the two opposite sides of the battery cell.

[0014] In one embodiment, the limiting mechanism includes a support, a second driving member mounted on the support, and a limiting block that is tractively connected to the power output end of the second driving member.

[0015] In one embodiment, the folding knife mechanism includes a base, a column mounted on the base, and a blade assembly fixed on the column. The base is provided with a guide rail and a third driving member, which drives the column to move along the guide rail.

[0016] It also includes a first adjustment mechanism and a second adjustment mechanism, wherein the first adjustment mechanism is used to limit the cutter head assembly to a first target position in the extension direction of the guide rail, and the second adjustment mechanism is used to limit the cutter head assembly to a second target position in the height direction of the column.

[0017] In one embodiment, the cutter head assembly includes a connecting component fixed to the column and a cutter head disposed at one end of the connecting component away from the column. The end of the cutter head has an adjacent first inclined surface and a second inclined surface, and a set angle is formed between the first inclined surface and the second inclined surface. The first inclined surface is used to contact the limiting block, and the second inclined surface is used to contact the top sealing edge of the battery cell.

[0018] In one embodiment, when the moving mechanism drives the pressing mechanism to move, it is used to place the battery cell at a predetermined position between the two limiting blocks. At the predetermined position, the part of the top of the battery cell to be folded extends beyond the position where the limiting block contacts the first inclined surface.

[0019] In one embodiment, the system further includes a controller electrically connected to the cell stabilizing mechanism, the limiting mechanism, and the folding blade mechanism, for driving the cell stabilizing mechanism, the limiting mechanism, and the folding blade mechanism to operate.

[0020] The technical solution provided in this application may include the following beneficial effects:

[0021] The folding device provided in this application has a cell stabilizing mechanism that can stabilize the position of the cell and prevent displacement during folding, thereby improving folding accuracy. The limiting mechanism clamps the cell in both directions to ensure that the sides of the cell are aligned and prevent the cell from tilting during folding. The limiting part of the folding knife mechanism contacts the limiting block to form a mechanical limit. The beveled surface of the folding corner guides the top sealing edge to bend to a set angle, thereby ensuring the consistency and accuracy of the folding angle.

[0022] Furthermore, in the solution of this application, the moving mechanism can work in coordination with the pressing mechanism and the limiting mechanism. It can not only transfer the battery cell to be folded to the support through the moving mechanism and the pressing mechanism, but also control the position of the battery cell between the two limiting blocks by controlling the moving distance of the pressing mechanism along the first horizontal direction. This can further improve the positioning accuracy of the battery cell during folding and achieve automated corner folding and improve corner folding efficiency.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0025] Figure 1 This is a schematic diagram of the structure of a folding device according to an embodiment of this application;

[0026] Figure 2 This is a top view of a folding device shown in one embodiment of this application.

[0027] Figure label:

[0028] 100. Cell stabilizing mechanism; 110. Support component; 120. Pressing mechanism; 121. Pressure plate; 122. First driving component; 130. Moving mechanism; Servo motor 131; 200. Limiting mechanism; 210. Limiting block; 211. Support; 212. Second driving component; 213. Push plate; 214. Sliding rod; 215. Heat insulation component; 300. Folding knife mechanism; 310. Knife head assembly; 3101. Knife head; 3102. Limiting part; 3103. Folding angle part; 311. Third driving component; 312. Guide rail; 313. Column; 3121. First adjusting mechanism; 3122. Second adjusting mechanism; 400. Cell. Detailed Implementation

[0029] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of a folding device according to an embodiment of this application; Figure 2 This is a top view of a folding device shown in one embodiment of this application.

[0036] See Figure 1 and Figure 2 This application provides a folding device, which includes a cell stabilizing mechanism 100, a limiting mechanism 200, and a folding knife mechanism 300. The cell stabilizing mechanism 100 includes a support member 110 and a pressing mechanism 120 disposed above the support member 110. The pressing mechanism 120 is used to press the cell 400 to be folded against the support member 110 along the thickness direction of the cell. The limiting mechanism 200 includes two relatively movable limiting blocks 210. The 0 are located on both sides of the support member 110 to abut against the two opposite sides of the battery cell 400; the folding mechanism 300 includes a blade assembly 310 that can move away from or towards the battery cell 400. The end of the blade assembly 310 facing the battery cell is provided with a limiting part 3102 and a folding part 3103. The limiting part 3102 is used to contact the limiting block 210, and the folding part is used to contact the top sealing edge of the battery cell 400 to fold the top sealing edge to a set angle.

[0037] The support member 110 is vertically fixed to the equipment base. The support member 110 has a support surface for placing the battery cell 400. The pressing mechanism 120 includes a first driving member 122 and a pressing block 121 driven by the first driving member 122. The first driving member 122 drives the pressing block 121 to move away from or towards the support surface. The first driving member 122 can be a servo motor or a cylinder, which is vertically mounted. The pressing block 121 can be a plate-shaped component. One lateral end of the pressing block 121 is driven by the servo motor, and the other end extends to the top of the support member 110, with its bottom facing the upper end of the support member 110. A pressure sensor can be embedded in the bottom of the pressing block 121. The servo motor receives the sensor signal through the controller to achieve constant pressure control. The pressure sensor provides real-time feedback of the clamping force to prevent overpressure damage to the battery cell.

[0038] The folding device provided in this application has a cell stabilizing mechanism 100 that can stabilize the position of the cell and prevent displacement during folding, thereby improving the folding accuracy. The limiting mechanism 200 clamps the cell bidirectionally to ensure that the sides of the cell are aligned and to prevent the cell from skewing during folding. The limiting part of the folding knife mechanism 300 contacts the limiting block 210 to form a mechanical limit. The beveled surface of the folding corner guides the top sealing edge to bend to a set angle to ensure the consistency of the folding angle.

[0039] In some embodiments, the support surface of the support member 110 is provided with adsorption holes, which are connected to a vacuum device and are used to adsorb the battery cells. After the adsorption holes are evacuated, the battery cells are adsorbed, eliminating the risk of battery cell slippage before contact with the pressure plate 121.

[0040] In some embodiments, the pressing mechanism 120 is also used to transfer the battery cell. The bottom of the pressure plate 121 is provided with an adsorption hole for adsorbing the battery cell, and the adsorption hole is connected to a vacuum device. Before the folding operation, the battery cell is adsorbed on the bottom of the pressure plate 121, and then transferred from other positions to above the support surface of the support member 110. Then, the first driving member 122 moves downward, controlling the pressure plate 121 to carry the battery cell 400 downward. When the bottom of the battery cell 400 contacts the support surface at the top of the support member 110 and the pressure sensor of the pressure plate 121 detects that the pressure has reached the threshold, the first driving member 122 stops moving. At this time, the battery cell is clamped between the support member 110 and the pressure plate 121 in the vertical direction. At the same time, since the support surface of the support member 110 and the bottom of the pressure plate 121 are provided with adsorption holes, the upper and lower surfaces of the battery cell will not slip, which can improve the positioning accuracy of the battery cell.

[0041] See Figure 1 and Figure 2 In some embodiments, a moving mechanism 130 is further included, and a pressing mechanism 120 is connected to the moving mechanism 130. The moving mechanism 130 is used to drive the pressing mechanism 120 to move. The moving direction of the moving mechanism 130 is along a first horizontal direction X, and the running direction of the limiting block 210 of the limiting mechanism 200 is along a second horizontal direction Y. The first horizontal direction X and the second horizontal direction Y are perpendicular and parallel to the extension directions of the two adjacent sides of the battery cell 400, respectively. In this embodiment, the movement direction of the blade assembly 310 of the folding blade mechanism 300 forms a set angle with the first horizontal direction X. This angle can be specifically set according to the folding requirements of the battery cell, for example, it can be between 15 and 85 degrees, but is not limited to this.

[0042] In this embodiment, the moving mechanism 130 can be a slide table, and the pressing mechanism 120 is mounted on the slider of the slide table. The moving mechanism 130 includes a servo motor 131, which can drive the pressing mechanism 120 to move along the first horizontal direction X via a ball screw.

[0043] In this application, the moving mechanism 130 achieves coordinated movement between the pressing mechanism 120 and the limiting mechanism 200. This not only transfers the battery cell to be folded to the support member 110, but also controls the position of the battery cell between the two limiting blocks 210 along the first horizontal direction X by controlling the moving distance of the pressing mechanism 120 along the first horizontal direction X. This further improves the positioning accuracy of the battery cell during folding.

[0044] In some embodiments, the limiting block 210 is a heating block used to heat the folded edges of the two opposite sides of the battery cell 400. Specifically, a heating tube may be embedded inside the limiting block 210, and the surface of the limiting block 210 is covered with a high-temperature resistant ceramic layer. The heating tube is connected to a controller via a temperature control module to control the temperature at a set value. Heating softens the aluminum-plastic film on the sides of the battery cell, thereby improving the sealing strength after folding. The ceramic layer prevents heat loss and avoids burning the battery cell body.

[0045] The folding device of this application has already folded the side of the battery cell placed on the support. After the lateral pressure of the limiting block, the heating block can not only heat the initial folded edge of the battery cell so that the side of the aluminum-plastic film is attached to the battery cell body, but also limit the battery cell when folding the top sealing edge. The three operations of heating, limiting and folding the top sealing edge can be carried out simultaneously, avoiding the problem of poor work efficiency caused by separate operation.

[0046] In some embodiments, the limiting mechanism 200 includes a support 211, a second driving member 212 mounted on the support 211, and a limiting block 210 tractively connected to the power output end of the second driving member 212. Supports 211 are provided on both sides of the limiting member, and two driving members are provided, each mounted on one of the two supports 211, with their power output ends facing each other. The driving member can be a cylinder, and the power output end of the cylinder is connected to the limiting block 210 via a sliding rod 214. When the two cylinders operate, the two limiting blocks 210 can be controlled to move closer or further apart. When they move closer and reach a predetermined position, the battery cell can be clamped laterally.

[0047] In this embodiment, two second driving members 212 are provided on both sides of the support member 110. The two second driving members 212 and the limiting block 210 are symmetrically arranged, which can provide symmetrical driving force and avoid limiting deviation caused by unilateral driving. Moreover, in addition to achieving lateral limiting, it also has a heating function to realize the ironing operation of the folded edge.

[0048] In some embodiments, the power output ends of the two second driving members 212 are arranged back-to-back. The limiting mechanism 200 further includes a push plate 213 connected to the power output end of the second driving member 212. The push plate 213 is connected to the limiting block 210 via a sliding rod 214. The support 211 may include a vertical plate, and one end of the second driving member 212 opposite to the power output end is fixed to the vertical plate. Two sliding rods 214 are provided, respectively located on both sides of the driving member. One end of each sliding rod 214 is connected to the push plate 213, and the other end is connected to the limiting block 210. The vertical plate is provided with a guide hole, and the sliding rod 214 passes through the guide hole.

[0049] In some embodiments, the limiting mechanism 200 further includes a mounting plate connected to the sliding rod 214, the limiting block 210 is a heating element, the heating element is mounted on the mounting plate, and a heat insulation element 215 is provided between the mounting plate and the heating element. The heat insulation element 215 can block the heat of the heating element and prevent the heat from being transferred to the main body of the limiting mechanism 200.

[0050] In some embodiments, a pressure sensor is provided at the limit block 210. The pressure sensor is electrically connected to the controller. The controller receives the sensor signal and controls the stroke of the cylinder according to the pressure signal of the sensor, thereby realizing constant pressure control on the side of the battery cell and avoiding damage to the battery cell due to overpressure or displacement of the battery cell due to insufficient pressure.

[0051] In some embodiments, the folding knife mechanism 300 includes a base, a column 313 mounted on the base, and a blade assembly 310 fixed on the column 313. The base is provided with a guide rail and a third driving member 311. The column 313 is movably mounted on the guide rail 312, and the third driving member 311 is used to drive the column 313 to move along the guide rail.

[0052] It also includes a first adjustment mechanism 3121 and a second adjustment mechanism 3122. The first adjustment mechanism 3121 is used to limit the cutter head assembly 310 to a first target position in the extension direction of the guide rail 312, and the second adjustment mechanism 3122 is used to limit the cutter head assembly 310 to a second target position in the height direction of the column 313. The column 313 is connected to the guide rail 312 via a slider, and the cutter head assembly 310 is mounted on the top of the column 313 via a quick-release clip.

[0053] The first adjustment mechanism 3121 can be a mechanical stop block located at one or both ends of the guide rail 312, and the second adjustment mechanism 3122 can be a scale and a locking bolt on the column 313. The first target position is adjusted by adjusting the position of the mechanical stop block, that is, limiting the horizontal stroke of the cutter head 3101; the second target position is adjusted by adjusting the locking bolt, that is, the height of the cutter head 3101 is precisely adjusted by the locking bolt and the scale block to adapt to different thicknesses of battery cells and different folding positions.

[0054] In some embodiments, the blade assembly 310 includes a connecting assembly fixed to the column 313 and a blade 3101 disposed at the end of the connecting assembly away from the column 313. The end of the blade 3101 has adjacent first and second inclined surfaces, forming a set angle between the first and second inclined surfaces. The first inclined surface is used to contact the limiting block, and the second inclined surface is used to contact the top sealing edge of the battery cell. The connecting assembly may include a heating assembly and a spring assembly assembled as one piece. The heating assembly can heat the blade 3101, thereby bending the side of the aluminum-plastic film at a set temperature. The spring assembly is used to control the contact pressure between the blade 3101 and the limiting block 210 during bending.

[0055] In this embodiment, two blade assembly 310 are disposed on both sides of the support member 110 and are arranged symmetrically. The ends of the two blade assembly 310 are opposite to the two ends of the top sealing edge of the battery cell. The guide rail 312 of the two blade assembly 310 has the same inclination relative to the first horizontal direction X or the second horizontal direction Y, or can be adjusted to be different according to actual needs.

[0056] When the moving mechanism 130 drives the pressing mechanism 120 to move, it can place the battery cell at a predetermined position between the two limiting blocks 210. At the predetermined position, the part of the battery cell to be folded at the top exceeds the position where the limiting block 210 contacts the first inclined surface. During the folding process, the moving mechanism 130 drives the pressing mechanism 120 to move above the battery cell and then presses the battery cell into the support surface of the support member 110. The two limiting blocks 210 clamp the battery cell from both sides. The cutting head assembly 310 advances along the guide rail 312. When the cutting head assembly 310 reaches the first target position, the limiting part contacts the limiting block 210, and the folding part contacts the top sealing edge. Since the top sealing edge exceeds the limiting block 210 in the first direction, the second inclined surface of the folding part contacts the top sealing edge first. After contacting the top sealing edge, the cutting head 3101 continues to run until the second inclined surface contacts the limiting block 210 and then stops. At this time, the second inclined surface bends the top sealing edge to a predetermined angle.

[0057] The solution in this application also includes a controller, which is electrically connected to the drive components of the cell stabilizing mechanism 100, the limiting mechanism 200, and the folding mechanism 300, for driving the operation of the cell stabilizing mechanism 100, the limiting mechanism 200, and the folding mechanism 300. This enables the moving mechanism 130 to be linked with the limiting block 210, ensuring that the top sealing edge of the cell extends 5-8mm beyond the contact position of the limiting block 210, providing a precise starting point for folding; the pressing mechanism 120 fixes the cell through vacuum adsorption and servo clamping in tandem, preventing displacement. The limiting block 210 has a built-in heating module to soften the aluminum-plastic film, improving the adhesion strength after folding and reducing the springback rate. The cutter head assembly 310 adopts a double-bevel design. First, the second inclined surface of the folding corner part 3103 contacts the top sealing edge to guide the bending direction. Then, the first inclined surface of the limiting part 3102 contacts the limiting block 210 to terminate the stroke, thereby reducing the angle error of the folding corner. In addition, the folding equipment of this application can achieve full-process automated control through a controller, shortening the folding operation cycle of a single battery cell and thus improving the folding efficiency. By adjusting the spacing of the limiting blocks 210, the height of the cutter head 3101, and the tilt angle, it can adapt to battery cells of different sizes and different folding corner requirements. Through mechanical hard limiting and pressure / temperature closed-loop control dual protection, the failure rate is reduced and the folding qualification rate is improved, thereby solving the problems of low efficiency and poor consistency of traditional manual folding and meeting the needs of large-scale production in the new energy industry.

[0058] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A folding apparatus, characterized by, include: A cell stabilization mechanism includes a support member and a pressing mechanism disposed above the support member. The pressing mechanism is used to press the cell to be folded along the thickness direction of the cell against the support member. The limiting mechanism includes two relatively movable limiting blocks, which are respectively disposed on the lateral sides of the support member and are used to abut against the two opposite sides of the battery cell. The folding mechanism includes a blade assembly that can move away from or towards the battery cell. The end of the blade assembly facing the battery cell is provided with a limiting part and a folding part. The limiting part is used to contact the limiting block, and the folding part is used to contact the top sealing edge of the battery cell to fold the top sealing edge to a set angle.

2. The folding device according to claim 1, characterized in that: The support member has a support surface for placing the battery cell. The pressing mechanism includes a first driving member and a pressing block that is pulsatorically connected to the first driving member. The first driving member is used to drive the pressing block to move away from or towards the support surface.

3. The folding device according to claim 2, characterized in that: The support surface and / or the pressure block are provided with adsorption holes, which are connected to a vacuum device and are used to adsorb the battery cell.

4. The folding device according to claim 1, characterized in that: It also includes a moving mechanism, the pressing mechanism being connected to the moving mechanism, the moving mechanism being used to drive the pressing mechanism to move; wherein, the moving mechanism moves along a first horizontal direction, the limiting block of the limiting mechanism moves along a second horizontal direction, the first horizontal direction and the second horizontal direction are perpendicular to each other and are parallel to the extension directions of the two adjacent sides of the battery cell, respectively.

5. The folding device according to claim 1, characterized in that: The limiting block is a heating block, which is used to heat the folded edges at the two opposite sides of the battery cell.

6. The folding device according to claim 1, characterized in that: The limiting mechanism includes a support, a second driving member mounted on the support, and a limiting block that is tractively connected to the power output end of the second driving member.

7. The folding device according to claim 4, characterized in that: The folding knife mechanism includes a base, a column mounted on the base, and a blade assembly fixed on the column. The base is provided with a guide rail and a third driving member, which drives the column to move along the guide rail. It also includes a first adjustment mechanism and a second adjustment mechanism, wherein the first adjustment mechanism is used to limit the cutter head assembly to a first target position in the extension direction of the guide rail, and the second adjustment mechanism is used to limit the cutter head assembly to a second target position in the height direction of the column.

8. The folding device according to claim 7, characterized in that: The cutter head assembly includes a connecting component fixed to the column and a cutter head disposed at one end of the connecting component away from the column. The end of the cutter head has an adjacent first inclined surface and a second inclined surface, and a set angle is formed between the first inclined surface and the second inclined surface. The first inclined surface is used to contact the limiting block, and the second inclined surface is used to contact the top sealing edge of the battery cell.

9. The folding device according to claim 8, characterized in that: When the moving mechanism drives the pressing mechanism to move, it is used to place the battery cell at a predetermined position between the two limiting blocks. At the predetermined position, the part of the top of the battery cell to be folded exceeds the position where the limiting block contacts the first inclined surface.

10. The folding device according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the cell stabilization mechanism, the limiting mechanism and the folding knife mechanism, and is used to drive the cell stabilization mechanism, the limiting mechanism and the folding knife mechanism to operate.

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