Battery cell disassembling reverse winding device

Abstract

The utility model discloses a battery cell disassembling and reverse winding device. The battery cell disassembling and reverse winding device comprises a battery cell fixing mechanism and a rotating mechanism, the battery cell fixing mechanism is used for fixing a battery cell; the rotating mechanism comprises a first driving assembly and an electromagnetic clutch, and the electromagnetic clutch is connected between the first driving assembly and the battery cell fixing mechanism; the electromagnetic clutch is used for enabling the first driving assembly to be jointed with the battery cell fixing mechanism, so that the first driving assembly drives the battery cell fixing mechanism to rotate; or the electromagnetic clutch is used for enabling the first driving assembly and the battery cell fixing mechanism to be disconnected and connected so as to block the driving force transmitted to the battery cell fixing mechanism by the first driving assembly. As the electromagnetic clutch is in the on-off state, the battery cell fixing mechanism can freely rotate along with the battery cell under the pulling force of the grabbing equipment. Therefore, the diaphragm is prevented from being damaged by bidirectional tension. According to the reverse winding device for disassembling the battery cell, the situation that the diaphragm of the battery cell is damaged is reduced, and lossless recovery of the battery cell is realized.

Description

Technical Field

[0001] This application relates to the field of battery disassembly technology, and in particular to a battery cell disassembly and dewinding device. Background Technology

[0002] Currently, with the rapid growth of electric vehicles and renewable energy, the number of waste lithium batteries is also increasing, and lithium battery recycling is in a stage of rapid development. However, lithium battery recycling technology is relatively immature, and the recycling process faces certain difficulties. For example, during the dismantling and production process of lithium battery cells, the positive and negative electrodes and the separator are recovered through a reverse winding method. During the reverse winding operation, the separator is easily damaged during the pulling process. Therefore, there is an urgent need to provide a cell dismantling and reverse winding device that does not damage the separator. Utility Model Content

[0003] The battery cell disassembly and dewinding device provided in this application reduces damage to the diaphragm and enables the lossless recycling of battery cells.

[0004] An embodiment of this application provides a battery cell disassembly and dewinding device, comprising: a battery cell fixing mechanism and a rotating mechanism. The battery cell fixing mechanism is used to fix the battery cell. The rotating mechanism includes a first driving component and an electromagnetic clutch, the electromagnetic clutch being connected between the first driving component and the battery cell fixing mechanism; the electromagnetic clutch is used to engage the first driving component with the battery cell fixing mechanism, so that the first driving component drives the battery cell fixing mechanism to rotate; or, the electromagnetic clutch is used to disengage the first driving component from the battery cell fixing mechanism, thereby blocking the driving force transmitted by the first driving component to the battery cell fixing mechanism.

[0005] In the above embodiment, firstly, the electromagnetic clutch is engaged, enabling the first drive assembly to drive the cell fixing mechanism to rotate, thereby rotating the cell and causing the cell's cut to rotate to a preset position. When the cell's cut reaches the preset position, the electromagnetic clutch disengages, blocking the driving force of the first drive assembly, and the cell fixing mechanism stops rotating. The aforementioned external force refers to the pulling force provided by an external gripping device. At this preset position, the diaphragm connector at the cell's cut can be gripped by the external gripping device. The gripping device grips the diaphragm connector at the cut and then pulls the diaphragm, causing the cell to begin unwinding. Because the electromagnetic clutch is disengaged, the cell fixing mechanism can rotate freely with the cell under the pulling force of the gripping device. The diaphragm is not subjected to the pulling force of the cell fixing mechanism, but only to the pulling force from one end of the gripping device, thus avoiding damage to the diaphragm due to bidirectional pulling force. Attached Figure Description

[0006] Figure 1 A schematic diagram of a battery cell disassembly and dewinding device provided for an embodiment of the application;

[0007] Figure 2 A schematic diagram of the structure of the cell fixing mechanism and the rotating mechanism provided in the embodiments of this application;

[0008] Figure 3 A schematic diagram of the battery cell fixing mechanism provided in an embodiment of this application;

[0009] Figure 4 A schematic diagram of another cell disassembly and dewinding device provided for an embodiment of this application;

[0010] Figure 5 A schematic diagram of the frame and electrode stripping mechanism provided for an embodiment of this application;

[0011] Figure 6 A schematic diagram of the structure of the diaphragm, electrode sheet, first pressure roller, second pressure roller and adjusting pressure roller provided for embodiments of this application.

[0012] Figure label:

[0013] 100-Battery cell; 1-Battery cell fixing mechanism; 2-Rotating mechanism; 201-First drive assembly; 202-Electromagnetic clutch; 203-First transmission assembly; 2031-Connecting plate; 2032-First transmission component; 2033-Second transmission component; 2034-Synchronous belt; 2011-Servo motor; 2012-Reducer; 11-First fixing block; 12-Second fixing block; 13-Second transmission assembly; 14-Second drive assembly ; 141-Telescopic cylinder; 142-Telescopic rod; 110-First connecting block; 120-Second connecting block; 143-First spring; 144-Second spring; 3-Lifting module; 4-Frame; 5-Blowing mechanism; 51-Nozzle; 52-Fixing plate; 6-Electrode peeling mechanism; 61-Fixing bracket; 62-Motor; 63-First pressure roller; 64-Second pressure roller; 200-Adjusting pressure roller; 101-Diaphragm; 102-Electrode sheet. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of the application is provided in conjunction with the accompanying drawings and embodiments.

[0015] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0016] References to “an embodiment” or “a specific embodiment” as used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.

[0017] In some related technologies, winding and stacking are core steps in the assembly process of lithium-ion battery cells. Among these, the winding process offers higher automation, higher yield, and allows for a greater number of electrode sheets. A cell formed by winding is created by sequentially stacking and winding together a positive electrode sheet, a separator, a negative electrode sheet, and another separator. During the winding process, a certain tension is applied to the separator to ensure the alignment of the positive electrode sheet, separator, and negative electrode sheet. During disassembly, the wound cell needs to be de-wound to unwind the separator, and the separator and the electrode sheets on both sides of it are retrieved. Because the separator needs to be stretched to open the wound cell during disassembly, it is susceptible to damage due to excessive tension.

[0018] To address the aforementioned issues, this application provides a battery cell disassembly and dewinding device that reduces damage to the diaphragm and enables lossless recycling of the battery cells.

[0019] Figure 1 A schematic diagram of a cell disassembly and dewinding device is provided for an embodiment of the application, as shown below. Figure 1 As shown, an embodiment of this application provides a battery cell disassembly and dewinding device, including a battery cell fixing mechanism 1 and a rotating mechanism 2. The battery cell fixing mechanism 1 is used to fix the battery cell 100. The rotating mechanism 2 includes a first driving assembly 201 and an electromagnetic clutch 202. The electromagnetic clutch 202 is connected between the first driving assembly 201 and the battery cell fixing mechanism 1. The electromagnetic clutch 202 is used to engage or disengage the first driving assembly 201 and the battery cell fixing mechanism 1 to block or transmit the driving force of the first driving assembly 201. When the electromagnetic clutch 202 is engaged, the driving force of the first driving assembly 201 is transmitted to the battery cell fixing mechanism 1, enabling the battery cell fixing mechanism 1 to rotate under the drive of the first driving assembly 201. When the electromagnetic clutch 202 is disengaged, the driving force of the first driving assembly 201 is blocked. At this time, the battery cell fixing mechanism 1 can rotate freely under the action of external force.

[0020] In the above embodiment, the electromagnetic clutch 202 is engaged, which enables the first drive assembly 201 to drive the cell fixing mechanism 1 to rotate, thereby rotating the cell 100 and causing the cut of the cell 100 to rotate to a preset position. When the cut of the cell 100 rotates to the preset position, the electromagnetic clutch 202 switches to disengagement, thereby blocking the driving force of the first drive assembly 201, and the cell fixing mechanism 1 stops rotating. The aforementioned external force refers to the pulling force provided by the external gripping device. At this preset position, the diaphragm end at the cut of the cell 100 can be gripped by the external gripping device. The gripping device grips the diaphragm end at the cut and then pulls the diaphragm, causing the cell 100 to begin unwinding. Since the electromagnetic clutch 202 is disengaged, the cell fixing mechanism 1 is disconnected from the first drive assembly 201, so the cell fixing mechanism 1 can rotate freely with the cell 100 under the pulling force of the gripping device. The diaphragm is not subjected to the tension of the battery cell fixing mechanism 1, but only to the tension on one side of the gripping device, thus avoiding damage to the diaphragm due to bidirectional tension.

[0021] This application pertains to prior art. The electromagnetic clutch 202 includes a coil. When energized, the coil of the electromagnetic clutch 202 generates a magnetic field, at which point the electromagnetic clutch 202 is engaged, and the force of the driving part can be transmitted to the driven part, thus achieving power transmission. When de-energized, the coil of the electromagnetic clutch 202 is de-energized, and the magnetic field disappears. The magnetic force between the driving and driven parts disappears, thereby achieving power disconnection.

[0022] Figure 2 Schematic diagrams of the cell fixing mechanism and rotating mechanism provided in the embodiments of this application are shown below. Figure 2 As shown, in one embodiment, the rotating mechanism 2 includes a first transmission assembly 203, which transmits the driving force of the first drive assembly 201 to the cell fixing mechanism 1 when the electromagnetic clutch 202 is engaged. Specifically, the first transmission assembly 203 includes a connecting plate 2031, a first rotating member, a second rotating member, and a synchronous belt 2034. The first rotating member is connected to the output shaft of the electromagnetic clutch 202, and the first and second rotating members are spaced apart at both ends of the connecting plate 2031 along a first direction M. The cell fixing mechanism 1 is connected to the second rotating member, and the synchronous belt 2034 is connected to the first and second rotating members. The connecting plate 2031 extends along the first direction, and the first transmission member 2032 and the second transmission member 2033 are located at both ends of the connecting plate 2031, which allows the cell fixing mechanism 1 to be further away from the electromagnetic clutch 202, thereby providing a larger rotational space for the cell fixing mechanism 1.

[0023] Please continue to refer to Figure 2In one specific embodiment, the first drive component 201 may include a servo motor 2011 and a reducer 2012. The reducer 2012 is installed at the output end of the servo motor 2011, and the electromagnetic clutch 202 is connected to the reducer 2012.

[0024] Figure 3 A schematic diagram of the battery cell fixing mechanism provided in the embodiments of this application is shown below. Figure 3 As shown, in one embodiment, the battery cell fixing mechanism 1 includes a first fixing block 11, a second fixing block 12, and a second transmission assembly. The first fixing block 11 and the second fixing block 12 are respectively connected to the second transmission assembly, and the second transmission assembly 13 can drive the first fixing block 11 and the second fixing block 12 to move closer or further apart. Before dewinding, the battery cell 100 is pre-shaped into a ring shape, and the ring-shaped battery cell 100 is sleeved on the outside of the first fixing block 11 and the second fixing block 12. In the initial position, the first fixing block 11 and the second fixing block 12 are in contact with each other or are located close to each other, which facilitates the installation of the battery cell 100. After the battery cell 100 is sleeved on the outside of the first fixing block 11 and the second fixing block 12, the relative positions of the first fixing block 11 and the second fixing block 12 are adjusted along the first direction M, for example, the first fixing block 11 and the second fixing block 12 are moved further apart to adapt to the diameter of the central hole of the ring-shaped battery cell 100, thereby fixing the battery cell to the battery cell fixing mechanism 1. The first fixing block 11 and the second fixing block 12 have the same shape and are symmetrically arranged. The first fixing block 11 and the second fixing block 12 can be elongated structures that extend in a second direction, which is perpendicular to the first direction and is the axial direction of the battery cell 100.

[0025] In one embodiment, the sides of the first fixing block 11 and the second fixing block 12 that are opposite to each other each have arc-shaped surfaces. When the cell fixing mechanism 1 is opened (when the first fixing block 11 and the second fixing block 12 are far apart), the arc-shaped surfaces can fit against the inner wall of the cell 100, making the cell 100 easier to fix and less likely to damage the electrodes or separator, which is beneficial for the recycling and disassembly of the cell 100. It is worth noting that the cell 100 is flexible. When the first fixing block 11 and the second fixing block 12 are far apart, the cell 100 is deformed by the first fixing block 11 and the second fixing block 12 and fits tightly against the first fixing block 11 and the second fixing block 12.

[0026] To reduce damage to the electrode plates and diaphragm, in one embodiment, a flexible protective layer may also be applied to the aforementioned arcuate surface.

[0027] In one embodiment, the second transmission component 13 can be a gear and rack transmission structure (not shown in the figure), which is existing technology. Two racks are arranged parallel to each other on both sides of the gear; when one rack moves, the other rack moves in the opposite direction. This achieves simultaneous movement of the first fixed block 11 and the second fixed block 12 in opposite directions. The specific structure will not be described in detail here.

[0028] Please continue to refer to Figure 3 In one embodiment, the cell fixing mechanism 1 further includes a second drive assembly 14, which includes a telescopic cylinder 141. The telescopic cylinder 141 and the second transmission assembly 13 are arranged along a first direction. A first fixing block 11 is connected to the second transmission assembly 13 via a first connecting block 110, and a second fixing block 12 is connected to the second transmission assembly 13 via a second connecting block 120. The telescopic cylinder 141 has a telescopic rod 142 that extends out and abuts against the first connecting block 110, pushing the first connecting block 110 to move, so that the first fixing block 11 and the second fixing block 12 move closer to each other. When installing the cell 100, the cell fixing mechanism 1 is in an initial position, in which the second transmission assembly 13 extends along the first direction, that is, the first fixing block 11 and the second fixing block 12 are arranged along the first direction, with the first fixing block 11 located between the telescopic cylinder 141 and the second fixing block 12. Thus, when the telescopic cylinder 141 is activated, the telescopic rod 142 can contact the first connecting block 110. When the battery cell 100 is installed, the telescopic rod 142 retracts. The electromagnetic clutch 202 engages, and the battery cell fixing mechanism 1 can rotate under the drive of the first drive assembly 201.

[0029] In one embodiment, the second drive assembly 14 further includes a reset member, which is installed between the first connecting block 110 and the second connecting block 120. The reset member is used to move the first connecting block 110 and the second connecting block 120 away from each other. Specifically, a fixing block is installed on the side wall of the second transmission assembly 13. Mounting rods are provided on both sides of the fixing block. The fixing block is located in the middle of the first fixing block 11 and the second fixing block 12 in the vertical projection of the second transmission assembly 13, and the fixing block is located on the side of the first fixing block 11 and the second fixing block 12. The aforementioned reset member can be a spring. A spring is sleeved on each mounting rod. For example, a first spring 143 is provided between the first connecting block 110 and the fixing block, and a second spring 144 is provided between the second connecting block 120 and the fixing block. When the telescopic rod 142 extends, the first connecting block 110 approaches the second connecting block 120, and the first connecting block 110 and the fixing block compress the first spring 143, giving the first spring 143 a preload. Similarly, the second connecting block 120 and the fixing block pressurize the second spring 144, giving the second spring 144 a preload. When the telescopic rod 142 retracts away from the first connecting block 110, under the action of the preload, the first spring 143 unfolds and pushes the first connecting block 110 away from the second connecting block 120, and the second spring 144 unfolds and pushes the second connecting block 120 away from the first connecting block 110. This achieves automatic separation of the first fixing block 11 and the second fixing block 12, fixing the battery cell 100 to the battery cell fixing mechanism 1.

[0030] In the above embodiment, two springs are provided to separate the first connecting block 110 from the second connecting block 120, thus ensuring even force distribution. In other embodiments, only one first spring 143 or only one second spring 144 can be provided to achieve the same separation between the first connecting block 110 and the second connecting block 120.

[0031] Please refer to Figure 4 In one embodiment, the battery cell disassembly and dewinding device further includes a lifting module 3 and a frame 4. The frame 4 is mounted on the lifting module 3, and the battery cell fixing mechanism 1 and the rotating mechanism 2 are both mounted on the frame 4. The lifting module 3 is used to drive the battery cell fixing mechanism 1 and the rotating mechanism 2 to move along a first direction M, thereby adjusting the relative position of the battery cell 100 and the gripping device. Specifically, the lifting module 3 can be a servo motor drive module.

[0032] In one embodiment, the cell disassembly and dewinding device further includes an air blowing mechanism 5, which is rotatably mounted on the frame 4. The extension direction of its rotating shaft is the same as the axial direction of the cell 100, i.e., the second direction. Specifically, the air blowing mechanism 5 includes a nozzle 51 and a fixing plate 52. The fixing plate 52 is rotatably connected to the frame 4 via a connector. The nozzle 51 is mounted on the end of the fixing plate 52 away from the frame 4. The rotatable connection between the fixing plate 52 and the frame 4 allows adjustment of the orientation of the nozzle 51. The air blowing mechanism 5 is connected to an external air source. When the cell 100 rotates to a preset position, the air blowing mechanism 5 blows air into the cut, causing the end of the diaphragm to flip outward, facilitating the gripping device to grip the end of the diaphragm.

[0033] Figure 5 This is a schematic diagram of the structure of the frame and electrode stripping mechanism provided in an embodiment of this application. Figure 6 A schematic diagram of the structure of the diaphragm, electrode sheet, first pressure roller, second pressure roller, and adjusting pressure roller provided for embodiments of this application. (In conjunction with...) Figures 4-6 In one embodiment, the cell disassembly and dewinding device may further include an electrode peeling mechanism 6, which is used to peel off the electrodes on the underside of the separator 101 when the cell 100 is dewinded. The electrode peeling mechanism 6 includes a motor 62, a fixed bracket 61, and a peeling module. The peeling module is mounted on the fixed bracket 61, and the fixed bracket 61 is connected to the motor 62. The motor 62 is used to drive the fixed bracket 61 to rotate around the cell fixing mechanism 1. The peeling module includes a first pressure roller 63 and a second pressure roller 64 arranged in parallel, with the first pressure roller 63 located above the second pressure roller 64. When the gripping device pulls the diaphragm 101, the diaphragm 101 passes over the first pressure roller 63. The external adjusting pressure roller 200 presses down on the diaphragm 101, making the diaphragm 101 at a certain angle. Since the electrode plate 102 is harder than the diaphragm 101, when the electrode plate 102 located on the lower surface of the diaphragm 101 moves to the adjusting pressure roller 200, its end separates from the diaphragm 101 and is inserted between the first pressure roller 63 and the second pressure roller 64, thereby realizing the separation of the lower electrode plate 102 from the diaphragm 101.

[0034] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A battery cell disassembly and dewinding device, characterized in that, include: A battery cell fixing mechanism, wherein the battery cell fixing mechanism is used to fix the battery cell; A rotating mechanism, comprising a first drive assembly and an electromagnetic clutch, wherein the electromagnetic clutch is connected between the first drive assembly and the cell fixing mechanism; The electromagnetic clutch is used to engage the first drive assembly with the cell fixing mechanism so that the first drive assembly drives the cell fixing mechanism to rotate; or, the electromagnetic clutch is used to disengage the first drive assembly from the cell fixing mechanism so as to block the driving force transmitted from the first drive assembly to the cell fixing mechanism.

2. The cell disassembly and dewinding device according to claim 1, characterized in that, The rotating mechanism includes a first transmission assembly, which includes a connecting plate, a first rotating member, a second rotating member, and a synchronous belt. The first rotating member is connected to the output shaft of the electromagnetic clutch. The first rotating member and the second rotating member are installed at intervals on the connecting plate. The battery cell fixing mechanism is connected to the second rotating member. The synchronous belt is connected to the first rotating member and the second rotating member.

3. The cell disassembly and dewinding device according to claim 1, characterized in that, The first drive assembly includes a servo motor and a reducer. The reducer is installed at the output end of the servo motor, and the electromagnetic clutch is connected to the reducer.

4. The cell disassembly and dewinding device according to claim 1, characterized in that, The cell fixing mechanism includes a first fixing block, a second fixing block, and a second transmission component. The first fixing block and the second fixing block are mounted on the second transmission component, and the second transmission component can drive the first fixing block and the second fixing block to move closer to or further away from each other.

5. The cell disassembly and dewinding device according to claim 4, characterized in that, The cell fixing mechanism further includes a second driving component, which includes a telescopic cylinder. The first fixing block is connected to the second transmission component via a first connecting block, and the second fixing block is connected to the second transmission component via a second connecting block. The telescopic cylinder drives the first connecting block to move so that the first fixing block and the second fixing block move closer to each other.

6. The cell disassembly and dewinding device according to claim 5, characterized in that, The second drive assembly further includes a reset member installed between the first connecting block and the second connecting block, the reset member being used to move the first connecting block and the second connecting block away from each other.

7. The cell disassembly and dewinding device according to claim 4, characterized in that, The first fixing block and the second fixing block each have an arc-shaped surface on their opposite sides.

8. The cell disassembly and dewinding device according to claim 7, characterized in that, The curved surface is provided with a flexible protective layer.

9. The cell disassembly and dewinding device according to claim 1, characterized in that, The battery cell disassembly and dewinding device further includes a lifting module and a frame. The frame is mounted on the lifting module, and the battery cell fixing mechanism and the rotating mechanism are mounted on the frame. The lifting module is used to drive the battery cell fixing mechanism and the rotating mechanism to move along a first direction.

10. The cell disassembly and dewinding device according to claim 1, characterized in that, The battery cell disassembly and dewinding device further includes a frame and an air blowing mechanism. The air blowing mechanism is used to blow open the cut of the battery cell so that the gripping device can grip the end of the diaphragm of the battery cell. The air blowing mechanism is mounted on the frame. The air blowing mechanism includes a nozzle and a fixing plate. The fixing plate is rotatably connected to the frame, and the nozzle is mounted on the end of the fixing plate away from the frame.

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