Battery cell disassembling device

Abstract

The utility model provides a battery cell disassembling device, which is used for disassembling a steel shell of a battery cell and is characterized by comprising a pipe cutter, a disassembling clamp and a lossless battery cell disassembling machine, and the pipe cutter is used for cutting off the head and the bottom of the battery cell; the disassembling clamp is used for tearing a notch in the edge of a steel shell on the head side of the battery cell; the lossless battery cell disassembling machine is provided with a central groove, a steel shell clamping roller and a push-out piece, and the central groove is used for accommodating the battery cell after the notch is torn; the steel shell clamping roller is used for tearing off the steel shell at the notch along the side face of the battery cell to form an opening from the head side to the bottom side, and the push-out piece is used for pushing out an internal pole piece of the battery cell from the steel shell with the opening torn off. According to the battery cell disassembling device, the steel shell outside the battery cell can be disassembled in a lossless manner, so that the risk during battery cell disassembling and the damage to an internal pole piece are reduced.

Description

Technical Field

[0001] This utility model relates to a battery cell disassembly device, and more specifically, to a battery cell disassembly device capable of disassembling the steel casing of a battery cell without damage. Background Technology

[0002] With the booming development of the new energy industry, high-performance lithium-ion batteries (cells) have become core components of new energy vehicles. During the research and development, mass production, and process optimization stages of lithium-ion batteries, it is necessary to disassemble them to evaluate performance or make performance improvements. The performance evaluation of the internal electrodes of the cell after removing the steel casing includes changes in the physical structure and properties of the active materials on the electrodes after different charge-discharge cycles.

[0003] like Figure 3 As shown, the existing battery cell dismantling device dismantles the battery cell as follows: First, the head of the battery cell (1) is cut off with a tube cutter (not shown); second, the steel shell (3) outside the battery cell is gradually opened along the notch on the head side of the battery cell with dismantling pliers (2); finally, the internal electrode (4) is taken out for analysis.

[0004] However, the problem with the existing technology is that during the operation, the disassembly pliers (2) may touch the outermost periphery of the electrode (4), causing some damage to the electrode. Therefore, when analyzing the electrode, the results will be affected due to the damage to the electrode; and the damaged electrode poses certain safety hazards. For example, if the electrode is severely damaged, electrode fragments may pierce the diaphragm, causing the positive and negative electrodes to come into contact, which may lead to a short circuit or even fire or explosion. Utility Model Content

[0005] This invention addresses the aforementioned problems by providing a battery cell disassembly device capable of non-destructively disassembling the battery cell's steel casing, thereby significantly improving the accuracy of electrode performance analysis and reducing the risks associated with battery cell disassembly.

[0006] This utility model relates to a battery cell disassembly device, characterized in that it includes a tube cutter, disassembly pliers, and a non-destructive battery cell disassembly machine.

[0007] The tube cutter is used to cut off the head and bottom of the battery cell;

[0008] The disassembly pliers are used to tear a notch in the edge of the steel casing on the head side of the battery cell.

[0009] The non-destructive cell disassembly machine has a central groove, steel-cased clamping rollers, and an ejector.

[0010] The central groove is used to accommodate the battery cell after it has been torn open.

[0011] The steel shell clamping roller is used to tear the steel shell at the notch along the side of the battery cell, forming an opening from the head side to the bottom side.

[0012] The ejector is used to eject the internal electrode of the battery cell from the steel casing after the opening has been torn off.

[0013] Preferably, the steel shell roller has a chuck, a roller body, support wheels located at both ends of the roller body, and a rotating handle.

[0014] The support wheel mounts the roller body above the central groove.

[0015] The clamp is fixedly mounted on the roller surface of the roller body and is used to clamp the steel shell at the notch.

[0016] The rotating handle is located at one end of the roller body and is used to drive the roller body to rotate while keeping it close to the side of the battery cell and move along the length of the central groove.

[0017] Preferably, the rotating handle is disposed at the end of the roller body via a roller-type transmission structure.

[0018] Preferably, it further includes a scribing mechanism for pre-scribing scratches on the steel casing on the side of the battery cell, the opening being torn along the scratches.

[0019] Preferably, the scratches are two consecutive straight lines or discontinuous dashed lines that are parallel to each other, or two consecutive straight lines or discontinuous dashed lines with gradually increasing spacing from the head side to the tail side of the battery cell.

[0020] Preferably, the roller-type transmission structure is a meshing wheel, which is fixedly connected to the rotating handle and the roller body and meshes with the support wheel.

[0021] Preferably, the central groove is a rectangle with an open top, and its two sidewalls in the length direction can move relative to each other in the width direction, thereby adjusting the width of the central groove.

[0022] Preferably, when the two sidewalls are in a first position with a relatively small distance between them, the two sidewalls clamp the battery cell to prevent it from rotating;

[0023] When the two sidewalls are in a second position with a relatively large distance between them, the battery cell is placed in the central groove, or the steel shell after the opening is torn off is loosened and detached from the internal electrode of the battery cell.

[0024] Preferably, the ejector is disposed at one end of the central groove and is movable along the length of the central groove.

[0025] Preferably, the other end of the central groove is provided with a residual shell recycling section for recycling residual shells torn off the surface of the battery cell.

[0026] Utility Model Effect

[0027] The battery cell disassembly device of this invention has a non-destructive battery cell disassembly machine, which can disassemble the outer steel shell of the battery cell without damage, thereby efficiently obtaining the complete internal electrode plates. This is beneficial for precise analysis of the cycle performance and rate performance of the assembled battery cell, while greatly reducing the risk of disassembling the battery cell. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the non-destructive cell dismantling machine used in the cell dismantling device of this utility model, (a) front view; (b) side view.

[0029] Figure 2 This is a schematic diagram illustrating the usage process of the battery cell disassembly device of this utility model.

[0030] Figure 3 This is a schematic diagram illustrating the usage process of an existing battery cell dismantling device. Detailed Implementation

[0031] To analyze the characteristics of the internal electrodes after battery cell assembly, the inventors designed a device for non-destructive disassembly of the steel casing of cylindrical lithium-ion battery cells, reducing the risks and damage to the internal electrodes during disassembly. This device allows for the gentle and undamaged acquisition of the internal electrodes, playing a crucial role in analyzing the electrode performance of the battery cell.

[0032] The specific embodiments of the battery cell disassembly device of this utility model will be described below with reference to the accompanying drawings.

[0033] This utility model discloses a battery cell disassembly device for disassembling the steel casing of a battery cell. It is characterized by comprising a tube cutter, disassembly pliers, and a non-destructive battery cell disassembly machine. The tube cutter can employ a commonly used structure in the art to cut off the head and bottom of the battery cell; the disassembly pliers can also employ a commonly used structure in the art to tear a notch in the edge of the steel casing on the head side of the battery cell.

[0034] Figure 1 This is a schematic diagram of the non-destructive cell dismantling machine (5) used in the cell dismantling device of this utility model, (a) front view; (b) side view.

[0035] from Figure 1(a) It can be seen that the non-destructive cell disassembly machine (5) has a central groove (6), a steel-shell clamping roller (7), and an ejector (not shown). The central groove (6) is a rectangle with an open top, used to accommodate the cell (1) after it has been torn open. After the cell (1) is placed in the central groove (6) with the notch facing upwards, as shown... Figure 1 As shown in (b), the steel shell clamping roller (7) tears the steel shell at the notch along the side of the battery cell (1), forming an opening from the head side to the bottom side. The steel shell (3) is released after the opening is torn off. Finally, the internal electrode (4) of the battery cell is pushed out from the steel shell (3) after the opening is torn off using an ejector (not shown).

[0036] The battery cell disassembly device of this invention improves the safety of the battery cell disassembly process and ensures the non-destructive nature of the internal plates after disassembly, thereby improving the accuracy of plate analysis.

[0037] More specifically, the steel shell clamping roller (7) has a clamp (not shown), a roller body (8), support wheels (9) located at both ends of the roller body, and a rotating handle (10). The support wheels (9) support the roller body (1) above the central groove (6). The clamp is fixedly set on the roller surface of the roller body (8) for clamping the steel shell located at the notch on the head side of the battery cell. The rotating handle (10) is set at one end (i.e. the side) of the roller body for driving the roller body to rotate while adhering to the side of the battery cell and move along the length direction of the central groove.

[0038] In the steel-shell clamping roller (7), it is preferable that the rotating handle (9) is located at the end of the roller body via a roller-type transmission structure. This roller-type transmission structure can be, for example, a meshing wheel structure. The meshing wheel is coaxial with the roller body (8), and its central part is fixedly connected to the rotating handle (10). The gears on the outer periphery mesh with the support wheel (9). Thus, by rotating the rotating handle (10), the roller body (8) is driven to rotate, making it rotate against the side of the battery cell, while the support wheel (9) is driven to move along the length direction of the central groove (6) with the roller body (8).

[0039] To ensure the correct trajectory is maintained when the opening of the steel casing is torn open, preventing deviation or detachment, the battery cell disassembly device of this invention preferably further includes a scribing mechanism (not shown) for pre-scribing marks on the steel casing on the side of the battery cell. This ensures that the opening of the steel casing is smoothly torn open from the head side of the battery cell to the bottom side. This scribing mechanism can be a grinding wheel, a carving knife, etc.

[0040] Preferably, the scratches are two consecutive straight lines or discontinuous dotted lines that are parallel to each other. In addition, in order to make it easier to loosen the steel shell after it is opened, and thus more smoothly push out the internal electrode, the scratches are more preferably two consecutive straight lines or discontinuous dotted lines with gradually increasing spacing from the head side to the tail side of the cell.

[0041] In the battery cell disassembly device of this utility model, the central groove (6) is a rectangular groove-shaped component with an open top. The battery cell (1) with its head and bottom cut off and a notch formed on the edge of the steel shell on the head side is placed into the central groove (6) with the notch facing upward. At this time, the head and bottom of the battery cell (1) are respectively located at both ends of the length direction of the central groove (6).

[0042] Preferably, the two sidewalls (6a, 6b) of the central groove (6) in the length direction can move relative to each other in the width direction, thereby adjusting the width of the central groove (6).

[0043] More specifically, when the relative distance between the two sidewalls is small, i.e. when it is in the first position, the two sidewalls (6a, 6b) can clamp the battery cell to prevent it from rotating, which is more conducive to the steel shell clamping roller (7) to stably peel off the steel shell from the surface of the battery cell (1) so that it opens.

[0044] When the relative distance between the two sidewalls is large, i.e. when it is in the second position, the battery cell (1) can be smoothly placed into the central groove (6), and then the relative distance between the two sidewalls (6a, 6b) is reduced, returning to the first position, thereby clamping and fixing the battery cell (1) and carrying out the disassembly process of the steel shell.

[0045] When the disassembly process is completed and the opening of the steel shell is torn off, the relative distance between the two side walls (6a, 6b) can increase again and return to the second position, thereby loosening the steel shell (3) after the opening is torn off and separating it from the internal electrode (4) of the battery cell, so that the internal electrode (4) of the battery cell can be pushed out more easily.

[0046] The ejector (not shown) is a component used to push the internal electrode of the battery cell out of the steel shell after the opening. It can adopt a structure commonly used in the art, such as a push plate or a push rod. The ejector can be set up separately. After the battery cell (1) with the opening of the steel shell torn off is removed from the central groove (6) of the non-destructive battery cell disassembly machine (5), the ejector is used alone to push the internal electrode (4) out of the loosened steel shell (3).

[0047] For easier operation, the ejector can also be directly placed in the non-destructive cell disassembly machine (5). In this case, it is preferable to place the ejector at one end of the central groove (6), such as the end where the head side of the cell is located. The ejector can move along the length of the central groove, so that the internal electrode (4) of the cell can be ejected from the steel shell (3) after the opening.

[0048] Preferably, a residual shell recycling section (not shown) is also provided at the other end of the central groove (6) for recycling residual shells (including steel shells at the opening and / or shells remaining after the steel shells are opened) to be torn off the surface of the battery cell.

[0049] Below, in conjunction with Figure 2 The disassembly process of the battery cell disassembly device of this utility model will be described in more detail.

[0050] Figure 2 This is a schematic diagram illustrating the usage process of the battery cell disassembly device of this utility model.

[0051] First, use a tube cutter (not shown) to cut off the head and bottom of the battery cell (1), and use disassembly pliers (not shown) to slightly tear a notch of about 2mm at the edge of the steel shell on the head side; second, clamp the battery cell (1) in the central groove (6) of the non-destructive battery cell disassembly machine (5), and clamp the steel shell at the notch to the chuck of the steel shell clamping roller (7); then push the rotating handle (10) to slowly roll up the steel shell (3) at the notch, as the roller (8) adheres to the battery cell (1) The chuck rotates sideways and moves slowly along the length of the central groove (6). The chuck pulls the torn notch, gradually tearing the steel shell (3) along the side of the battery cell. The steel shell clamping roller (7) continues to work until the steel shell at the notch is completely torn along the side of the battery cell, forming a complete opening (11) from the head side to the bottom side. At this point, the chuck releases the steel shell, the roller (8) stops rotating and moving, and the steel shell (3) of the battery cell is successfully torn open, exposing the internal electrode (4). Finally, the battery cell is disassembled, and the internal electrode (4) is slowly pushed out for subsequent analysis and processing.

[0052] Throughout the process, the rotational speed and torque of the steel shell clamping roller (7) are strictly controlled to ensure that the size of the tear is appropriate and the edges are neat, so as not to cause excessive pulling or damage to the inside of the steel shell.

[0053] The inventors applied this battery cell disassembly device in a real-world scenario, using cylindrical battery cells with diameters of 18mm, 21mm, and 22mm. To accommodate future product updates, the width of the central groove can be adjusted up to 50mm. As a result, the disassembled battery cells achieved a 99% non-destructive rate, ensuring accurate analysis of the internal electrodes while simultaneously improving safety during disassembly.

[0054] The battery cells used in the battery cell disassembly device of this utility model are preferably cylindrical battery cells, and more preferably cylindrical lithium-ion battery cells or nickel-metal hydride battery cells.

[0055] The above description, with reference to the accompanying drawings and specific embodiments, illustrates specific examples of the battery cell disassembly device of this utility model. However, this utility model is not limited to the specific embodiments described above. Various modifications or element changes can be made without departing from the spirit of this utility model, and these modifications or element changes are also included within the protection scope of this utility model.

Claims

1. A battery cell disassembly device for disassembling the steel casing of a battery cell, characterized in that, Includes pipe cutters, disassembly pliers, and non-destructive cell disassembly machines. The tube cutter is used to cut off the head and bottom of the battery cell; The disassembly pliers are used to tear a notch in the edge of the steel casing on the head side of the battery cell. The non-destructive cell disassembly machine has a central groove, steel-cased clamping rollers, and an ejector. The central groove is used to accommodate the battery cell after it has been torn open. The steel shell clamping roller is used to tear the steel shell at the notch along the side of the battery cell, forming an opening from the head side to the bottom side. The ejector is used to eject the internal electrode of the battery cell from the steel casing after the opening has been torn off.

2. The battery cell dismantling device according to claim 1, characterized in that, The steel shell clamping roller has a clamp, a roller body, support wheels located at both ends of the roller body, and a rotating handle. The support wheel mounts the roller body above the central groove. The clamp is fixedly mounted on the roller surface of the roller body and is used to clamp the steel shell at the notch. The rotating handle is located at one end of the roller body and is used to drive the roller body to rotate while keeping it close to the side of the battery cell and move along the length of the central groove.

3. The battery cell disassembly device according to claim 2, characterized in that, The rotating handle is located at the end of the roller body via a roller-type transmission structure.

4. The battery cell dismantling device according to claim 1 or 2, characterized in that, It further includes a scribing mechanism for pre-scribing scratches on the steel casing on the side of the battery cell, and the opening is torn along the scratches.

5. The cell disassembly device according to claim 4, characterized in that, The scratches are two consecutive straight lines or discontinuous dashed lines that are parallel to each other, or two consecutive straight lines or discontinuous dashed lines with a gradually increasing spacing from the head side to the tail side of the battery cell.

6. The cell dismantling device according to claim 3, characterized in that, The roller-type transmission structure is a meshing wheel, which is fixedly connected to the rotating handle and the roller body, and meshes with the support wheel.

7. The battery cell dismantling device according to claim 1 or 2, characterized in that, The central groove is a rectangle with an open top, and its two sidewalls along the length direction can move relative to each other along the width direction, thereby adjusting the width of the central groove.

8. The battery cell disassembly device according to claim 7, characterized in that, When the two sidewalls are in a first position with a relatively small distance between them, the two sidewalls clamp the battery cell to prevent it from rotating. When the two sidewalls are in a second position with a relatively large distance between them, the battery cell is placed in the central groove, or the steel shell after the opening is torn off is loosened and detached from the internal electrode of the battery cell.

9. The battery cell dismantling device according to claim 1 or 2, characterized in that, The ejector is located at one end of the central groove and can move along the length of the central groove.

10. The cell disassembly device according to claim 9, characterized in that, The other end of the central groove is also provided with a residual shell recycling section for recycling residual shells torn off the surface of the battery cell.

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