Lithium battery recycling and decomposing device and recycling and decomposing method

Abstract

The invention provides a lithium battery recycling and decomposing device and a recycling and decomposing method based on the device, and the device comprises a placing platform which is used for fixing or placing a battery cell; the blade part is perpendicular to and far away from the placement platform, the axial included angle between the blade part and the battery cell is within 90 degrees, and the blade part is driven to be close to the placement platform to cut the battery cell into a slope surface; and the spine part pierces into the coiled material structure in the battery cell towards a slope surface formed after the battery cell is slit, so that the coiled material structure of the battery cell and the shell relatively slide and are separated along the axial direction of the battery cell.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery recycling, and in particular relates to a lithium battery recycling and decomposition device and a recycling and decomposition method. Background Art

[0002] Lithium batteries are roughly divided into cylindrical lithium batteries, square lithium batteries, soft-pack lithium batteries and special-shaped lithium batteries according to their appearance and packaging. Cylindrical lithium batteries are a very common type of battery in battery packs. The recycling of lithium batteries is of great significance to resource circulation and environmental protection. Among them, cobalt, manganese, lithium, iron and other elements are key metal elements in lithium battery recycling.

[0003] The core goal of lithium battery recycling is to collect or refine the materials in different parts of the battery cell according to their different properties. The mechanical sorting method mainly separates and refines the materials through physical differences in lithium batteries through crushing, screening, magnetic separation and other physical methods. This method directly crushes the battery cells to meet the needs of large-scale and industrialized production. However, in fact, this method of directly crushing the battery cells and then performing screening, magnetic separation and other operations also increases the work pressure and difficulty of subsequent screening, magnetic separation and other processes, and is not conducive to improving the separation efficiency of various materials. Summary of the invention

[0004] In view of the above technical problems, this application proposes a lithium battery recycling and decomposition device and a recycling and decomposition method. The specific technical solutions are as follows:

[0005] In a first aspect of the present application, a lithium battery recycling and decomposition device is provided, comprising:

[0006] A placement platform, the placement platform is used to fix or place the battery cells;

[0007] A blade portion, wherein the blade portion is vertical and far away from the placement platform, the axial angle between the blade portion and the battery cell is within 90°, and the blade portion is driven close to the placement platform to cut the battery cell into a slope;

[0008] The spike portion pierces the coiled material structure inside the battery cell toward the slope formed after the battery cell is cut, so that the coiled material structure of the battery cell and the shell are relatively slid and separated along the axial direction of the battery cell.

[0009] Preferably, the placement platform is arranged horizontally, vertically, or inclined.

[0010] Preferably, the placement platform is provided with a detachable connection fixture, the fixture comprising two clamping assemblies for fixing the two ends of the battery cell, and the ends of the battery cell are rotatably restricted in the clamping assemblies;

[0011] After the battery core is cut, the clamping assembly can slide back and forth to separate, and the battery core can be rotated to change the direction of the slope.

[0012] Preferably, the clamping assembly comprises a first pressing sheet, a second pressing sheet, a sleeve and a base;

[0013] One end of the sleeve has an inwardly retracted spring sheet, and the battery core is squeezed and fixed in the sleeve by the spring sheet;

[0014] One end of the base has an opening that matches the sleeve, and the wall of the base has a rolling slip ring. After the base is sleeved outside the sleeve from one end of the spring sheet, the inner wall of the base clamps the sleeve and squeezes the spring sheet to fix the battery core;

[0015] The first pressing plate and the second pressing plate are detachable to restrict the base inside, so that the battery core can rotate in the clamping assembly through the rolling slip ring.

[0016] Preferably, the outer wall of the sleeve is further provided with a limiting protrusion, the limiting protrusion is provided with a notch, and the opening of the base is provided with a latch corresponding to the notch.

[0017] Preferably, the end of the base has an inclined surface, the inclined surface is exposed to the outside of the first pressing piece and the second pressing piece, and a fixed probe is arranged outside the inclined surface;

[0018] After the battery core is cut, the clamping assembly slides and separates in the opposite direction, and the end of the probe contacts the inclined surface so that the base drives the battery core to rotate.

[0019] Preferably, the end of the base further has a socket, and when the battery cell rotates, the probe moves to the socket, and the probe can be inserted into the socket to limit the rotation of the battery cell while maintaining the back-sliding separation of the clamping assembly.

[0020] Preferably, both ends of the pressing sheet 1 are provided with latches, the outer side of the latches is provided with embedding grooves, the placement platform is provided with slots matching the latches, and the outer side of the slots is provided with elastic inserts;

[0021] After the latch is inserted into the slot, the elastic insert is embedded in the slot;

[0022] And / or the placement platform is provided with a flippable pressing plate, and the pressing plate is controlled to flip and contact with the clamping assembly to restrict the clamping assembly between the pressing plate and the placement platform.

[0023] Preferably, a separator is fixed on the placement platform to drive the clamping assembly to slide and separate in a reverse direction;

[0024] The spike portion is arranged on the back side of the placement platform, and a hole for accommodating the spike portion to pass through is arranged on the placement platform.

[0025] In a second aspect of the present application, a lithium battery recycling and decomposition method is provided, wherein the method uses the above-mentioned lithium battery recycling and decomposition device, and the method is:

[0026] Fix the battery cell on the placement platform;

[0027] The blade is driven to move to cut the battery cell, so that a slope is formed at the cut;

[0028] The driving spike portion penetrates into the coil structure of the battery cell from the slope of the battery cell;

[0029] The battery cell is driven to slide in the axial direction, so that the coiled material structure is drawn out of the housing along the axial direction of the battery cell.

[0030] The beneficial effects of the present invention are as follows: after the battery cell is cut by a blade portion arranged at a certain angle in the axial direction of the battery cell, a slope is formed at the cut, and a spike portion is arranged based on the slope to penetrate into the coil structure inside the battery cell toward the slope of the battery cell, so that the coil structure of the battery cell is separated from the outer shell of the battery cell along the axial direction X of the battery cell, and the outer shell and the internal coil structure can be relatively completely separated;

[0031] The device can be used as a pre-process for lithium battery recycling. After relatively complete separation of the outer shell and the internal coil structure, the electrolyte, diaphragm and other components of the coil structure can be separated separately, thereby improving the material separation efficiency and avoiding the problem of carrying the outer shell after direct crushing, which increases the working pressure and difficulty of subsequent screening, magnetic separation and other processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic diagram of the structure of a cylindrical lithium battery;

[0033] Figure 2 What is shown is a schematic diagram of the state of the battery cell after being cut;

[0034] Figures 3 to 5 Shown are different arrangements of the battery cells on the blade;

[0035] Figure 6 Shown is a schematic diagram of the structure of a lithium battery recycling and decomposition device;

[0036] Figure 7 Shown is a schematic diagram of the structure of the fixator;

[0037] Figure 8 Shown is a schematic diagram of the structure of the clamping assembly;

[0038] Fig. 9 Shown is a schematic diagram of the structure of the sleeve;

[0039] Fig.10 It is shown that Figure 6 A partial enlarged view of the middle A;

[0040] Fig.11 What is shown is a schematic diagram of the structure of a fixed battery cell;

[0041] Fig.12 The diagram shows a state where the battery cell, sleeve and base are fixedly assembled;

[0042] Fig.13 Shown is a schematic diagram of realizing cell flipping;

[0043] Fig.14 Shown is a schematic diagram of the setting state of the spike portion. DETAILED DESCRIPTION

[0044] In the following description, certain specific details are set forth in order to provide a thorough understanding of the various embodiments. However, it will be appreciated by those skilled in the art that the present invention may be practiced without these details. In other cases, well-known structures are not shown or described in detail to avoid unnecessarily obscuring the description of the embodiments. Unless the context otherwise requires, throughout the specification and the appended claims, the word "comprising" shall be interpreted in an open, inclusive sense, i.e., as "including but not limited to".

[0045] "One embodiment" or "embodiment" mentioned throughout this specification means that in at least one embodiment, specific features, structures or characteristics related to the embodiment are included. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places throughout this specification do not necessarily all refer to the same embodiment. In addition, specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In addition, as used in this specification and the appended claims, the singular forms "one / kind" and "the" include plural indicators unless the context clearly dictates otherwise. It should also be noted that the term "or" is generally used in its meaning that includes "and / or" unless the context clearly dictates otherwise.

[0046] A cell is a storage part of a rechargeable battery. It is the smallest functional unit of a rechargeable battery and generally includes a positive electrode, a negative electrode, a diaphragm, an electrolyte, a casing, a cap / positive electrode cap, a gasket, a safety valve, etc. In this application, a cylindrical lithium battery is more suitable. Its shape is as follows: Figure 1 shown.

[0047] Lithium battery recycling refers to the separation of materials from the perspective of environmental protection and resource recycling by discharging and disassembling used or substandard lithium batteries, mainly to recover scarce metals such as cobalt, nickel, and lithium.

[0048] The present application provides a lithium battery recycling and decomposition device, which includes a placement platform 100, which is used to fix or place a battery cell 10 to be recycled and decomposed, and keep the axial direction X of the battery cell 10 fixed when the battery cell 10 is fixed or placed on the placement platform 100. At the same time, a blade 200 is provided, and the blade 200 is arranged to be perpendicular to the plane where the placement platform 100 is located, and at the same time, it should maintain an angle between 0 and 90° (excluding 0 to 90°) with the axial direction X of the battery cell 10, and the blade 200 can be driven by an external power to reciprocate perpendicular to the placement platform 100.

[0049] When the battery cell 10 is fixed or placed on the placement platform 100, the driving blade 200 moves perpendicularly to the placement platform 100 to cut the battery cell 10, and the cut surface of the battery cell 10 becomes a slope surface, such as Figure 2 What is shown is a portion of a battery cell 10 whose cross section is a sloped surface. Then, the spike portion 300 is driven toward the cross section of the battery cell 10 to penetrate into the coil structure 11 inside the battery cell 10, so that the coil structure 11 of the battery cell 10 and the outer shell of the battery cell 10 are separated along the axial direction X of the battery cell 10, so that the outer shell and the internal coil structure 11 can be quickly separated, and the relative integrity of the outer shell and the internal coil structure 11 can be maintained.

[0050] The configuration of the spike portion 300 is similar to that of the blade portion 200 , and can be driven by external power to reciprocate perpendicular to the axial direction X of the battery cell 10 . When the spike portion 300 is driven to move toward the battery cell 10 , the slope of the battery cell 10 after being cut should be kept facing or mainly facing the spike portion 300 .

[0051] In the embodiment, the placement of the placement platform 100 is not limited, for example, it can be a horizontally arranged placement platform 100, for example, it can be a vertically arranged placement platform 100, for example, it can be an inclined placement platform 100.

[0052] In the implementation scheme, the number of battery cells 10 placed or fixed on the placement platform 100 is also not limited, and can be one or more. In some implementation schemes, when the number of battery cells 10 placed or fixed on the placement platform 100 exceeds one, the battery cells 10 can be arranged according to a specific rule or can be arranged irregularly, but the preferred method is to arrange multiple battery cells 10 according to a specific rule, especially in a single row or multiple rows along a certain straight line direction.

[0053] In some embodiments, the number of cells 10 placed or fixed on the placement platform 100 is more than one, and when the cells 10 are arranged in a single row, the head ends and tail ends of the cells 10 are aligned, and the blade 200 is set as a straight blade. Figure 3In some embodiments, the number of cells 10 placed or fixed on the placement platform 100 is more than one, and when the cells 10 are arranged in a single row, the head ends and tail ends of the cells 10 are aligned, and the blade 200 is set as a staggered blade. The state of the blade 200 and the cell 10 is as shown in FIG. Figure 4 In some embodiments, the number of cells 10 placed or fixed on the placement platform 100 is more than one, and when the cells 10 are arranged in a single row, the head and tail ends of the cells 10 are misaligned, and the blade 200 is set as a straight blade. The state of the blade 200 and the cell 10 is as shown in FIG. Figure 5 shown.

[0054] Example

[0055] Figure 6 What is shown is a schematic structural diagram of a lithium battery recycling and decomposition device as a specific embodiment, the device includes a placement platform 100 and a blade 200, the placement platform 100 is vertically arranged, the blade 200 is perpendicular to the placement platform 100, and the blade 200 is arranged on the outside of the placement platform 100, a plurality of battery cells 10 with their head ends and tail ends aligned are fixed on the placement platform 100, and the blade 200 is correspondingly arranged as a staggered blade.

[0056] By controlling the blade 20 to move toward the battery cell 10 perpendicularly to the placement platform 100 , the battery cell 10 is cut into two parts, and each part has a slope cut.

[0057] Figure 7 What is shown is a schematic diagram of the structure of the fixture 400, which is used to fix the battery cell 10 to be recycled and decomposed, and the battery cell 10 is further fixed on the placement platform 100 through the fixture 400; the fixture 400 includes two clamping components 410, and the two clamping components 410 are respectively used to fix the two ends of the same battery cell 10, and when the battery cell 10 is fixed, a gap for the blade 200 to move will still be formed between the two clamping components 410, and the fixture 400 and the placement platform 100 are detachably connected.

[0058] Figure 8 What is shown is a schematic diagram of the structure of the clamping assembly 410, which includes a pressing plate 1 411, a pressing plate 2 412 and a sleeve 413. The sleeve 413 is fixed between the pressing plate 1 411 and the pressing plate 2 412, and the pressing plate 1 411 and the pressing plate 2 412 are also detachably connected. The detachable connection methods of the pressing plate 1 411 and the pressing plate 2 412 include but are not limited to snap-on, magnetic adsorption fixation, and bolt connection.

[0059] After placing the battery cell 10 in the sleeve 413, the sleeve 413 and the battery cell 10 are clamped and fixed at the same time by using the pressing sheet 1 411 and the pressing sheet 2 412. The exposed section of the sleeve 413 is a bevel, which is used to cooperate with the blade 20 to bevel and form a slope. Here, the setting of the sleeve 413, on the one hand, cooperates with the pressing sheet 1 411 and the pressing sheet 2 412 to fix the battery cell 10, and on the other hand, forms a covering support outside the battery cell 10 to prevent the battery cell 10 shell from being excessively deformed when the blade 20 cuts the battery cell 10, thereby increasing the difficulty of separating the coil structure 11 from the shell.

[0060] Fig. 9 What is shown is a schematic diagram of the structure of the sleeve 413, the inner diameter of the sleeve 413 matches the battery cell 10, so that the battery cell 10 can be sleeved in the middle of the sleeve 413, and the end of the sleeve 413 away from its groove also has an inward-retracted spring piece 414, and the spring piece 414 can be used to preliminarily fix the battery cell 10 in the sleeve 413, so that the sleeve 413 and the battery cell 10 can slide against each other; after the sleeve 413 and the battery cell 10 are placed between the pressing sheet 1 411 and the pressing sheet 2 412, the spring piece 414 will be squeezed by the pressing sheet 1 411 and the pressing sheet 2 412 between the pressing sheet 1 411 and the pressing sheet 2 412, so that the shell of the battery cell 10 is fixed more firmly.

[0061] Fig.10 It is shown that Figure 6 The local enlarged view of A in the middle, combined with Figure 8 The two ends of the pressing piece 411 are provided with latches 415, and the outer side of the latch 415 is provided with an embedding groove 416; the placement platform 100 is provided with a slot 101 for fitting the latch 415, and the outer side of the slot 101 is provided with an elastic insert 102.

[0062] After the latch 415 is aligned with the slot 101 and inserted, the clamping assembly 410 and the placement platform 100 can be initially fixed. During the insertion of the latch 415, the elastic insert 102 is compressed and deformed until the elastic insert 102 corresponds to the embedding groove 416 and then embeds into the embedding groove 416. The elastic insert 102 plays a certain limiting role on the latch 415.

[0063] See also Figure 6 , a reversible pressing plate 103 is also provided on the placement platform 100. When the clamping assembly 410 is initially fixed to the placement platform 100, the pressing plate 103 is controlled to flip and contact the clamping assembly 410 to restrict the clamping assembly 410 between the pressing plate 103 and the placement platform 100, thereby preventing the clamping assembly 410 from slipping. The flipping drive control of the pressing plate 103 can use a motor, a hydraulic rod, etc., and cooperate with a sensor for positioning. The specific implementation method is relatively conventional, so it is not described in detail in this application.

[0064] See also Fig.10A separator 500 is also fixed on the placement platform 100. The separator 500 is used to separate the two clamping assemblies 410 and the fixed part of the battery cell 10 to both sides after the battery cell 10 is cut, and to increase the distance between the two slopes formed after the battery cell 10 is cut to avoid the subsequent rotation of the battery cell 10. The separator 500 can be two one-way cylinders or one two-way cylinder. The cylinder's telescopic rod pushes the latch 415 to separate the two clamping assemblies 410. Correspondingly, the slot 101 will also be set in a strip shape to cooperate with the sliding action of the clamping assembly 410 when it is separated.

[0065] See also Fig. 9 The outer wall of the sleeve 413 also has a limiting protrusion 417, and the limiting protrusion 417 is used to cooperate with and fix the battery core 10; Fig.11 What is shown is a structure for fixing the battery cell 10 based on the sleeve 413. In addition to the sleeve 413, the fixed battery cell 10 also needs to cooperate with the base 420. One end of the base 420 is open for sleeve-fitting onto the outside of the sleeve 413, and the sleeve depth is limited by the limiting protrusion 417. A rolling ring 421 is also fixed on the outer wall of the base 420. Generally speaking, a bearing can be used to realize the function of the rolling ring 421, which is mainly to reduce the rotational resistance of the base 420 in the clamping assembly 410. Insert the battery cell 10 into the sleeve 413 and make the sleeve 413 extend out of the sleeve 413, and then insert the base 420 from one end of the spring 414. The base 420 will first contact the end of the battery cell 10, and then partially press the battery cell 10 out of the sleeve 413. At the same time, when the base 420 is inserted into the sleeve 413, the raised structure arranged inside the base 420 will squeeze the spring 414, and the battery cell 10 will be pressed and fixed by the spring 414, so as to realize the fixation of the battery cell 10, the sleeve 413 and the base 420. After that, the battery cell 10, the sleeve 413 and the base 420 are placed in the clamping assembly 410 for fixation.

[0066] The end of the base 420 also has an inclined surface 422 , and the inclined surface 422 is used to facilitate the flipping of the battery cell 10 .

[0067] Fig.12 What is shown is a schematic diagram of the state in which the battery cell 10, the sleeve 413 and the base 420 are fixedly assembled. There is at least one notch on the limiting protrusion 417 of the sleeve 413, and there is a latch 423 corresponding to the notch on the base 420. When the battery cell 10, the sleeve 413 and the base 420 are fixedly assembled, the latch 423 engages with the notch to lock the sleeve 413 and the base 420, and at the same time realizes the positioning of the sleeve 413 and the base 420.

[0068] Fig.13What is shown is a schematic diagram of realizing the flipping of the battery cell 10 in cooperation with the inclined surface 422. A probe 430 is arranged on the outer side of the clamping assembly 410. The probe 430 is fixed and is initially located at the top of the inclined surface 422. When the separator 500 separates the two clamping assemblies 41 to both sides, the clamping assembly 41 drives the base 420 to approach the probe 430. The probe 430 slides along the inclined surface 422 to compensate for the displacement of the base 420. The base 420 also rotates at the same time, and the rotation direction of the base 420 is opposite to the sliding direction of the probe 430 along the inclined surface 422. In this way, the battery cell 10 in the clamping assembly 410 is rotated by a certain angle, especially the slope formed by the cutting is directed toward the spike portion 300.

[0069] In order to make it easier to flip the battery cell 10 , after the clamping assembly 410 fixes the battery cell 10 , the inclined surface 422 at the end of the base 420 should be outside the clamping assembly 410 .

[0070] A socket 424 is provided at the bottom end of the inclined surface 422 , and the socket 424 is used to cooperate with the probe 430 . When the probe 430 moves to this position, the socket 424 is inserted into the socket 424 , so that the clamping assembly 41 can continue to slide and separate to both sides.

[0071] The number of the probes 430 , the positions of the probes 430 , and the direction of the inclined plane 422 are all set according to the rotation requirements of the battery cell 10 , and the specific settings are adjustable.

[0072] The probe 430 can be fixed on the pressure plate 103 and flipped with the pressure plate 103. In this way, when the pressure plate 103 is flipped open, the probe 430 will also be opened at the same time, making it easier to remove the clamping assembly 410; the probe 430 can also be directly fixed on the placement platform 100.

[0073] Fig.14 What is shown is a schematic diagram of the setting state of the spike portion 300, where the spike portion 300 is set on the back side of the placement platform 100, and the placement platform 100 is provided with a hole for accommodating the spike portion 300 to pass through, and the spike portion 300 is fixed by a fixing portion 310, which can be connected to an external driving device to drive the spike portion 300 to pass through the placement platform 100.

[0074] The present application also provides a lithium battery recycling and decomposition method based on the above-mentioned lithium battery recycling and decomposition device, which comprises the following steps:

[0075] Step (1), fix the battery cell 10 by the clamping components 410 on both sides, and then fix it on the placement platform 100;

[0076] Step (2), driving the blade 20 to move and cut the battery cell 10, so that a slope is formed at the cut of each battery cell 10;

[0077] Step (3), driving the separator 50 to separate the cut battery core 10 to both sides;

[0078] Step (4), controlling the battery cell 10 to flip so that the slope formed after the battery cell 10 is cut faces the placement platform 100;

[0079] Step (5), driving the spike portion 300 to pass through the hole on the placement platform 100 and penetrate into the coil structure 11 of the battery cell 10 from the slope of the battery cell 10;

[0080] Step (6), driving the separator 50 again to separate the cut battery core 10 to both sides, so that the coil structure 11 is pulled out of the housing along the axial direction of the battery core 10;

[0081] Step (7), driving the spike portion 300 to return to its original position, so that the coiled material structure 11 is blocked by the placement platform 100 and falls off from the spike portion 300.

[0082] In the above method, step (3) and step (4) can be performed simultaneously.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. Lithium battery recycling and decomposition device, characterized in that: include: A placement platform, the placement platform is used to fix or place the battery cells; A blade portion, wherein the blade portion is vertical and far away from the placement platform, the axial angle between the blade portion and the battery cell is within 90°, and the blade portion is driven close to the placement platform to cut the battery cell into a slope; The spike portion pierces the coiled material structure inside the battery cell toward the slope formed after the battery cell is cut, so that the coiled material structure of the battery cell and the shell are relatively slid and separated along the axial direction of the battery cell.

2. The lithium battery recycling and decomposition device according to claim 1, characterized in that: The placement platform is arranged horizontally, vertically, or inclined.

3. The lithium battery recycling and decomposition device according to claim 1, characterized in that: A detachable connection fixture on the placement platform, the fixture comprising two clamping assemblies for fixing two ends of the battery cell, and the ends of the battery cell are rotatably restricted in the clamping assemblies; After the battery core is cut, the clamping assembly can slide back and forth to separate, and the battery core can be rotated to change the direction of the slope.

4. The lithium battery recycling and decomposition device according to claim 3, characterized in that: The clamping assembly comprises a first pressing sheet, a second pressing sheet, a sleeve and a base; One end of the sleeve has an inwardly retracted spring sheet, and the battery core is squeezed and fixed in the sleeve by the spring sheet; One end of the base has an opening that matches the sleeve, and the wall of the base has a rolling slip ring. After the base is sleeved outside the sleeve from one end of the spring sheet, the inner wall of the base clamps the sleeve and squeezes the spring sheet to fix the battery core; The first pressing plate and the second pressing plate are detachable to restrict the base inside, so that the battery core can rotate in the clamping assembly through the rolling slip ring.

5. The lithium battery recycling and decomposition device according to claim 4, characterized in that: The outer wall of the sleeve is also provided with a limiting protrusion, the limiting protrusion is provided with a notch, and the opening of the base is provided with a latch corresponding to the notch.

6. The lithium battery recycling and decomposition device according to claim 4, characterized in that: The end of the base has an inclined surface, the inclined surface is exposed to the outside of the first pressing piece and the second pressing piece, and a fixed probe is arranged outside the inclined surface; After the battery core is cut, the clamping assembly slides and separates in the opposite direction, and the end of the probe contacts the inclined surface so that the base drives the battery core to rotate.

7. The lithium battery recycling and decomposition device according to claim 6, characterized in that: The end of the base is also provided with a socket. When the battery core rotates, the probe moves to the socket. The probe can be inserted into the socket to limit the rotation of the battery core while maintaining the back sliding separation of the clamping assembly.

8. The lithium battery recycling and decomposition device according to claim 4, characterized in that: The two ends of the pressing sheet 1 are provided with latches, the outer side of the latches is provided with an embedding groove, the placement platform is provided with a slot matching the latch, and the outer side of the slot is provided with an elastic insert; After the latch is inserted into the slot, the elastic insert is embedded in the slot; And / or the placement platform is provided with a flippable pressing plate, and the pressing plate is controlled to flip and contact with the clamping assembly to restrict the clamping assembly between the pressing plate and the placement platform.

9. The lithium battery recycling and decomposition device according to claim 3, characterized in that: A separator is fixed on the placement platform to drive the clamping assembly to slide and separate in a reverse direction; The spike portion is arranged on the back side of the placement platform, and a hole for accommodating the spike portion to pass through is arranged on the placement platform.

10. A lithium battery recycling and decomposition method, characterized in that: The method uses the lithium battery recovery and decomposition device according to any one of claims 1 to 9, and the method is: Fix the battery cell on the placement platform; The blade is driven to move to cut the battery cell, so that a slope is formed at the cut; The driving spike portion penetrates into the coil structure of the battery cell from the slope of the battery cell; The battery cell is driven to slide in the axial direction, so that the coiled material structure is drawn out of the housing along the axial direction of the battery cell.

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