Disassembly process of double-roll roll core

Abstract

The embodiment of the invention provides a disassembly process of double roll cores, and belongs to the technical field of batteries. The disassembly process of the double-roll roll core comprises the following steps: unfolding an outer-layer diaphragm of the roll core to be disassembled; identifying the winding direction of the diaphragm of the roll core to be disassembled; unfolding a part of a laminated structure formed by the inner-layer diaphragm, the inner-layer pole piece, the outer-layer diaphragm and the outer-layer pole piece; cutting off the inner-layer diaphragm in the unfolded laminated structure until the inner-layer pole piece is exposed; and under the condition that the inner-layer diaphragm, the inner-layer pole piece, the outer-layer diaphragm and the outer-layer pole piece are respectively grasped, the roll core to be disassembled is reversed based on the winding direction, so that the inner-layer diaphragm, the inner-layer pole piece, the outer-layer diaphragm and the outer-layer pole piece are separated from one another. According to the double-roll roll core disassembling process provided by the invention, the double-roll roll core structure can be effectively disassembled through a series of steps, so that the disassembling and recycling efficiency of the pole piece in the double-roll roll core is effectively improved, the production cost of the battery is favorably reduced, and the resource waste is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a disassembly process of a double-roll core. Background Art

[0002] In the battery recycling process, a series of operations are required to disassemble the battery cell to separate the anode sheet, upper diaphragm, cathode sheet and lower diaphragm. In the related technology, a hot cutting assembly is usually used to cut the multi-layer diaphragm on the outer ring of the winding core, and the winding core is supported by the winding core pins. However, the anode sheet is heat-conductive, and the cutting assembly will melt the lower diaphragm of the anode sheet while melting the multi-layer diaphragm on the outer ring of the winding core, making it impossible to rewind. In addition, the winding core pins will cause serious damage to the pole sheet and diaphragm, which is easy to cause the pole sheet and diaphragm to break during the rewinding process. There is room for improvement. Summary of the invention

[0003] The present application provides a disassembly process for a double-roll core, which reduces damage to the pole pieces when disassembling the core and improves the disassembly and recovery efficiency of the pole pieces in the double-roll core.

[0004] In a first aspect, an embodiment of the present application provides a disassembly process of a double-roll core, comprising: Unfold the outer diaphragm of the core to be disassembled; Identify the winding direction of the diaphragm of the winding core to be disassembled; unfolding a portion of a stacked structure formed by an inner diaphragm, an inner pole piece, an outer diaphragm and an outer pole piece; Cutting the inner diaphragm in the unfolded stacked structure until the inner electrode sheet is exposed; While grasping the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece respectively, the winding core to be disassembled is reversed based on the winding direction to separate the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece from each other.

[0005] In the above technical solution, through a series of steps, the double-roll core structure can be effectively disassembled, thereby effectively improving the efficiency of disassembling and recycling the pole pieces in the double-roll core, which is beneficial to reducing the production cost of the battery and reducing resource waste.

[0006] In some embodiments, unfolding the outer membrane of the core to be disassembled comprises: Soften the core to be disassembled; Cut off the diaphragm of the outer layer of the outer electrode of the softened winding core to be disassembled; Unfold the severed diaphragm.

[0007] In the above technical solution, by adopting a variety of methods, after cutting off the outer diaphragm, the cut diaphragm can be unfolded to preliminarily unfold the diaphragm in a manner adapted to different disassembly requirements, thereby improving the disassembly efficiency while maintaining the integrity and stability of the diaphragm during the unfolding process.

[0008] In some embodiments, the method of cutting off the softened diaphragm of the outer layer of the outer electrode sheet of the winding core to be disassembled comprises: The outer layer of the outer pole piece of the softened winding core to be disassembled is cut off by CO2 laser.

[0009] In the above technical solution, CO2 laser is used to cut the softened outer diaphragm of the core to be disassembled, and the cutting quality and efficiency can be improved through reasonable equipment selection and cutting path planning.

[0010] In some embodiments, the step of identifying the winding direction of the diaphragm of the winding core to be disassembled includes: Press the unfolded diaphragms on both sides of the core to be disassembled; Lift the core to be disassembled to tension the diaphragm on one side; Obtain the rotation direction of the core to be disassembled when it is lifted; The winding direction of the membrane of the winding core to be disassembled is determined based on the rotation direction.

[0011] In the above technical solution, by mastering the winding principle and identification skills of the diaphragm, the winding direction of the diaphragm of the core to be disassembled can be accurately identified.

[0012] In some embodiments, between identifying the winding direction of the diaphragm of the winding core to be disassembled and unfolding a portion of the stacked structure formed by the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece, the method further includes: While pressing the membranes unfolded on both sides of the core to be disassembled, the core to be disassembled is lifted until the membrane on one side is separated from the core to be disassembled; Remove the separated diaphragm.

[0013] In the above technical solution, pressing the unfolded diaphragms on both sides of the winding core to be disassembled helps to maintain the stability of the diaphragms during the subsequent lifting process and reduce their sliding or unnecessary tension.

[0014] In some embodiments, the step of unfolding a portion of the stacked structure formed by the inner diaphragm, the inner pole piece, the outer diaphragm, and the outer pole piece comprises: While pressing the unfolded diaphragms on both sides of the core to be disassembled, lift the core to be disassembled until it rotates at least one circle, and unfold the stacked structure formed by part of the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece.

[0015] In the above technical solution, the stacked structure formed by the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece can be partially unfolded by lifting the core to be disassembled until the core to be disassembled rotates at least one circle.

[0016] In some embodiments, between unfolding a portion of the stacked structure formed by the inner diaphragm, the inner electrode piece, the outer diaphragm and the outer electrode piece and cutting the inner diaphragm in the unfolded stacked structure to expose the inner electrode piece, the disassembly process further includes: identifying the end positions of the inner electrode piece and the outer electrode piece; The step of cutting the inner diaphragm in the unfolded stacked structure to expose the inner electrode sheet comprises: Based on the end positions of the inner electrode sheet and the outer electrode sheet, the inner diaphragm in the stacked structure is cut, and the cutting position is located on the inner side of the end of the inner electrode sheet in the winding direction; The cut inner diaphragm in the unfolded stacked structure is removed to expose the inner pole piece.

[0017] In the above technical solution, the inner diaphragm in the stacked structure can be cut off to expose the inner pole piece, providing strong support for the subsequent disassembly process.

[0018] In some embodiments, while grasping the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece respectively, reversing the winding core to be disassembled based on the winding direction so as to separate the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece from each other comprises: Determine the center position of the core to be disassembled; Based on the center position, the core to be disassembled is threaded; Grasp the inner diaphragm, inner pole piece, outer diaphragm and outer pole piece respectively; The winding core to be disassembled is driven to reverse based on the winding direction, so that the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece are separated from each other.

[0019] In the above technical solution, the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece can be successfully separated from each other.

[0020] In some embodiments, the step of respectively grasping the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece comprises: Clamp the outer diaphragm, adsorb the inner diaphragm, adsorb the inner electrode sheet, and adsorb the outer electrode sheet.

[0021] In the above technical solution, the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece can be grasped respectively, which provides an important basis for the subsequent reversal operation.

[0022] In some embodiments, the driving of the to-be-disassembled winding core to reverse based on the winding direction so as to separate the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece from each other comprises: Based on the winding direction, during the process of reverse unwinding the reel to be disassembled, the inner electrode sheet and the outer electrode sheet are respectively wound up by two sets of winding shafts, the outer diaphragm is wound up by the clamping shaft, and the inner diaphragm is wound up by the winding shaft.

[0023] In the above technical solution, the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece can be separated from each other and rolled up on corresponding shafts respectively.

[0024] In some embodiments, after the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece are separated from each other, the disassembly process further comprises: The separated inner electrode pieces and outer electrode pieces are stored in corresponding recycling boxes respectively; The coated areas of the separated inner and outer pole pieces are removed.

[0025] In the above technical solution, the separated inner layer pole pieces and the outer layer pole pieces can be stored and processed.

[0026] In some embodiments, the step of storing the separated inner electrode sheets and outer electrode sheets into corresponding recycling boxes respectively includes: The separated inner and outer electrodes are guided by the swing rod to be folded in a Z shape and stored in the corresponding recycling box.

[0027] In the above technical solution, the recycling box can safely and orderly collect the pole pieces separated from the winding core to be disassembled, which helps to improve the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 One of the flow charts of the disassembly process of the double-roll core provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of a winding core provided in some embodiments of the present application; Figure 3 The second flowchart of the disassembly process of a double-roll core provided in some embodiments of the present application.

[0030] Reference numerals: Core 20; Inner diaphragm 210, inner pole piece 220; Outer diaphragm 230 , outer pole piece 240 . DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0033] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0036] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0037] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0038] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0039] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0040] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode collector includes a positive electrode collector body and a positive electrode ear. The positive electrode active material layer is coated on the surface of the positive electrode collector body. The positive electrode ear is not coated with the positive electrode active material layer and protrudes from the positive electrode collector body. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode collector includes a negative electrode collector body and a negative electrode ear. The negative electrode active material layer is coated on the surface of the negative electrode collector body. The negative electrode ear is not coated with the negative electrode active material layer and protrudes from the negative electrode collector body. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can be passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0041] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure. The embodiment of the present application takes the electrode assembly as an example of a wound structure.

[0042] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery cells are used to store or provide electrical energy.

[0043] In the field of battery recycling, after the capacity of used batteries is reduced to a certain level, they can no longer be used in the original equipment, but they still have residual value, so they can be recycled and used in a cascade or recycled. In the relevant technology, the disassembly of the battery cell requires a series of operations to separate the anode pole piece, the upper diaphragm, the cathode pole piece and the lower diaphragm. However, the existing double-wound pole piece disassembly process usually uses a hot cutting component to cut the multi-layer diaphragm of the outer ring of the winding core, and supports the winding core through the winding core pins. However, the anode piece is heat-conductive, and the cutting knife component will melt the lower diaphragm of the anode pole piece while melting the multi-layer diaphragm of the outer ring of the winding core, resulting in the inability to rewind. In addition, the winding core pins will cause serious damage to the pole piece and the diaphragm, which is easy to cause the pole piece and the diaphragm to break during the rewinding process. The efficiency of pole piece disassembly and recycling is not high.

[0044] Based on the above considerations, in order to solve the problem of low efficiency in disassembly and recycling of pole pieces in a double-roll core, the present application provides a disassembly process for a double-roll core, which can cut multiple layers of diaphragms without damaging the lower diaphragm of the anode pole piece, and at the same time is convenient for finding the center of the core and inserting pins for support without damaging the pole pieces and diaphragms of the core. Through the disassembly process of the double-roll core, the pole pieces of the double-roll core can be efficiently disassembled and recycled, thereby effectively improving the efficiency of disassembly and recycling of pole pieces in the double-roll core, which is beneficial to reducing the production cost of the battery and reducing waste of resources.

[0045] According to some embodiments of the present application, referring to Figure 1 , Figure 1 One of the flow charts of the disassembling process of the double-roll core 20 provided in some embodiments of the present application. The present application provides a disassembling process of the double-roll core 20, including: step 110, step 120, step 130, step 140 and step 150.

[0046] The core 20 structure to be disassembled usually refers to the internal structure of the lithium-ion battery. This core 20 is the core part of the lithium-ion battery, responsible for storing and releasing electrical energy. It is usually precisely wound by multiple layers of materials, including an inner diaphragm 210, an inner electrode 220, an outer diaphragm 230 and an outer electrode 240 stacked in sequence.

[0047] The pole piece is where lithium ions are stored in lithium-ion batteries and is also the main place for electrochemical reactions in batteries. According to the different polarities, the pole pieces can be divided into positive pole pieces and negative pole pieces. The inner pole piece 220 can be a positive pole piece or a negative pole piece, depending on the structure of the winding core 20 and the design of the battery. The pole piece is usually made by coating a mixture of active materials, conductive agents and binders on a current collector.

[0048] The diaphragm is located between the positive electrode sheet and the negative electrode sheet, and mainly plays an isolating role to prevent the positive electrode sheet and the negative electrode sheet from direct contact and causing a short circuit. At the same time, the diaphragm can also allow lithium ions to pass through during the charging and discharging process, thereby completing the charging and discharging cycle of the battery. The inner diaphragm 210 is a thin film close to the inner electrode sheet 220. The outer diaphragm 230 is similar to the inner diaphragm 210, and also plays the role of isolating the positive electrode sheet and the negative electrode sheet, and allowing lithium ions to pass through. The outer diaphragm 230 is usually located on the side of the outer electrode sheet 240 close to the inner electrode sheet 220, and together with the inner diaphragm 210 constitutes the isolation layer of the battery.

[0049] In the unwound stacked structure, the outer diaphragm 230 is located between the inner pole piece 220 and the outer pole piece 240, and the inner diaphragm 210 is located on the side of the inner pole piece 220 away from the outer diaphragm 230. At this time, the inner diaphragm 210 is not in contact with the outer pole piece 240. After the stacked structure is wound, the inner diaphragm 210 is located between the inner pole piece 220 and the outer pole piece 240, thereby isolating the positive pole piece from the negative pole piece.

[0050] Step 110 , unfold the outer diaphragm 230 of the winding core 20 to be disassembled.

[0051] During the disassembly of the core 20, the outer diaphragm 230 of the core 20 to be disassembled is first unfolded. This step is used to expose the structure of the inner layer of the core 20 to be disassembled and prepare for the subsequent steps. During the unfolding process, maintaining the integrity of the diaphragm can reduce tearing or damage so that the subsequent steps can proceed smoothly.

[0052] Step 120 , identifying the winding direction of the diaphragm of the winding core 20 to be disassembled.

[0053] After unfolding the outer membrane 230 of the winding core 20 to be disassembled, the winding direction of the membrane in the winding core 20 is identified so that the subsequent reversal step can be performed correctly. Specifically, image recognition technology can be used to automatically identify the winding direction to improve efficiency and accuracy.

[0054] Step 130 , unfolding a portion of the stacked structure formed by the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 .

[0055] After the winding direction is identified, the stacked structure formed by the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 continues to be unfolded.

[0056] Step 140 , cutting the inner diaphragm 210 in the unfolded stacked structure until the inner electrode piece 220 is exposed.

[0057] After the stacked structure is unfolded to a certain extent, part of the inner layer separator 210 is cut off to expose the inner layer pole piece 220, so as to more easily separate the inner layer and outer layer components in the subsequent inversion step.

[0058] Step 150, while grasping the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 respectively, reverse the winding core 20 to be disassembled based on the winding direction to separate the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 from each other.

[0059] Then, while grasping the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 respectively, the core 20 to be disassembled is reversed according to the winding direction previously identified. This step is used to separate the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 from each other during the reversal process.

[0060] The double-roll core 20 disassembly process provided in the present application can realize the effective disassembly of the double-roll core 20 structure through a series of steps, thereby effectively improving the efficiency of disassembly and recycling of the pole pieces in the double-roll core 20, which is beneficial to reducing the production cost of the battery and reducing resource waste.

[0061] According to some embodiments of the present application, referring to Figure 2 and Figure 3 , Figure 2 A schematic structural diagram of a double-roll core 20 provided in some embodiments of the present application. Figure 3 The second flow chart of the disassembly process of the double-wound core 20 provided in some embodiments of the present application. Step 110, unfolding the outer diaphragm 230 of the core 20 to be disassembled, includes: step 111, step 112 and step 113, wherein step 111 is to soften the core 20 to be disassembled; step 112 is to cut off the diaphragm of the outer layer of the outer pole piece 240 of the core 20 to be disassembled that has been softened; step 113 is to unfold the cut diaphragm.

[0062] Exemplarily, the core 20 to be disassembled can be softened by squeezing the core 20 with a circular roller or by running the core 20 along the roller. The core 20 bends under the applied pressure, and the bonding force between the diaphragm and the pole piece in the core 20 is destroyed, preparing for the separation of the pins and the pole piece of the core 20.

[0063] After the softening treatment is completed, the outer diaphragm of the softened outer electrode piece 240 of the core 20 to be disassembled is cut off. The outer electrode piece 240 of the core 20 to be disassembled is the anode electrode piece, and the outer diaphragm 230 can be completely cut off by a variety of cutting methods, such as hot cutting, cold cutting and laser cutting.

[0064] Hot cutting mainly uses a high-temperature heat source to melt and cut off the diaphragm, such as a heating wire. This method is usually suitable for thicker or tougher diaphragm materials. If the diaphragm material is thin, it may affect the pole piece under the diaphragm.

[0065] Cold cutting mainly uses a mechanical blade or shearing mechanism to cut the diaphragm at room temperature. Cold cutting does not cause thermal damage and is usually suitable for thinner or more fragile diaphragm materials.

[0066] Laser cutting mainly uses a high-energy laser beam to quickly cut the diaphragm. Laser cutting has the advantages of high precision, high speed and low contact force, and is suitable for diaphragm materials of various thicknesses.

[0067] Taking laser cutting as an example, the laser has a good absorption capacity for non-metals such as diaphragms, so it can cut the diaphragms, but has a poor absorption capacity for metals such as anode plates, so it can protect the anode plates from being cut. At the same time, the laser is blocked by the anode plates, so the diaphragm under the anode plates will not be cut.

[0068] After the outer diaphragm 230 is cut, the cut diaphragm is unfolded. The diaphragm can be unfolded in various ways, such as vacuum negative pressure unfolding, clamping unfolding by clamping, and friction unfolding.

[0069] Taking the clamping and unfolding by the clamping jaws as an example, the diaphragm can be unfolded by a scraper. The scraper is usually made of hard material, such as metal or hard plastic, so that it can form effective contact with the cut diaphragm and exert sufficient force to unfold the diaphragm. When the scraper moves horizontally along the cut diaphragm, the scraper will scrape across the surface of the diaphragm, thereby separating the diaphragm from the winding core 20 to be disassembled and initially unfolding it.

[0070] Taking friction unfolding as an example, the diaphragm can be unfolded by a rotatable brush. The rotatable brush is composed of soft bristles and a supporting structure. The bristles can be natural fibers or synthetic fibers. When the brush rotates and moves horizontally, the bristles will contact and rub against the severed diaphragm, and separate and unfold the diaphragm through its soft properties and rotating action. Compared with a scraper, a brush is more suitable for processing more fragile or sensitive diaphragm materials.

[0071] When the diaphragm material is harder or thicker, a scraper can be selected, which can apply greater force to unfold the diaphragm. On the contrary, when the diaphragm material is thinner or more fragile, a rotatable brush can be selected to avoid damaging the diaphragm during the unfolding process.

[0072] It is understandable that by adopting a variety of methods, after cutting off the outer diaphragm 230, the cut diaphragm can be unfolded to initially unfold the diaphragm in a manner that meets different disassembly requirements, thereby improving the disassembly efficiency while maintaining the integrity and stability of the diaphragm during the unfolding process.

[0073] According to some embodiments of the present application, referring to Figure 2 and Figure 3 Step 112, cutting off the outer membrane of the outer electrode piece 240 of the core 20 to be disassembled that has been softened, may include: cutting off the outer membrane of the outer electrode piece 240 of the core 20 to be disassembled that has been softened by a CO2 laser.

[0074] After the core 20 to be disassembled has been softened, the outer diaphragm 230 has become soft and easy to cut. At this time, the core 20 to be disassembled is placed on a special cutting platform, and the outer diaphragm 230 is cut using a CO2 laser. During the cutting process, the laser beam will move along a preset cutting path to quickly and accurately cut the diaphragm. When the laser beam completes the cutting along the preset path, the outer diaphragm 230 will be successfully cut off, exposing the outer pole piece 240, providing convenience for subsequent operations.

[0075] It is understandable that by using CO2 laser to cut the softened outer membrane 230 of the core 20 to be disassembled, the cutting quality and efficiency can be improved through reasonable equipment selection and cutting path planning.

[0076] According to some embodiments of the present application, referring to Figure 3 , step 120, identifying the winding direction of the diaphragm of the core 20 to be disassembled, including: pressing the diaphragms unfolded on both sides of the core 20 to be disassembled; lifting the core 20 to be disassembled to tension the diaphragm on one side; obtaining the rotation direction of the core 20 to be disassembled when lifting; determining the winding direction of the diaphragm of the core 20 to be disassembled based on the rotation direction.

[0077] When identifying the winding direction of the diaphragm of the core 20 to be disassembled, the diaphragms unfolded on both sides of the core 20 to be disassembled can be pressed by using a special clamp or a pressing plate to reduce the risk of diaphragm sliding or generating unnecessary tension in subsequent operations, and then the core 20 to be disassembled is lifted by a clamping mechanism such as a lifting platform or a mechanical arm. At this time, the ends of the diaphragms unfolded on both sides of the core 20 to be disassembled are pressed, and the cylinder of the clamping mechanism drives the clamping claws to clamp the two sides of the core 20 to be disassembled. One side of the diaphragms on both sides of the core 20 to be disassembled is The discarded waste diaphragm has one side as the end diaphragm in the winding direction of the core 20 to be disassembled. During the rising process of the core 20 to be disassembled, the core 20 to be disassembled will unfold in the reverse winding direction, and the end diaphragm in the winding direction of the core 20 to be disassembled will be tensioned, and the diaphragm opposite to it is the waste diaphragm. Then, the PLC program that clamps the core 20 to be disassembled can identify the direction of the core 20 to be disassembled, so as to judge its winding direction by combining the rotation direction of the core 20 to be disassembled with the winding principle of the diaphragm.

[0078] Specifically, when the winding core 20 to be disassembled rotates clockwise during lifting, the diaphragm is wound from left to right or from top to bottom. Conversely, when the winding core 20 to be disassembled rotates counterclockwise during lifting, the diaphragm is wound from right to left or from bottom to top.

[0079] It is understandable that by mastering the winding principle and identification techniques of the diaphragm, the diaphragm winding direction of the winding core 20 to be disassembled can be accurately identified.

[0080] According to some embodiments of the present application, referring to Figure 3 , between step 120, identifying the winding direction of the diaphragm of the core 20 to be disassembled and step 130, unfolding a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240, the method also includes: step 121, while pressing the diaphragms unfolded on both sides of the core 20 to be disassembled, lifting the core 20 to be disassembled until the diaphragm on one side is separated from the core 20 to be disassembled, and removing the separated diaphragm at the same time.

[0081] Step 120, identifying the winding direction of the diaphragm of the core 20 to be disassembled includes: pressing the diaphragms unfolded on both sides of the core 20 to be disassembled, lifting the core 20 to be disassembled to tension the diaphragm on one side, obtaining the rotation direction of the core 20 to be disassembled when lifting, and determining the winding direction of the diaphragm of the core 20 to be disassembled based on the rotation direction.

[0082] After identifying the winding direction of the diaphragm of the core 20 to be disassembled, continue to lift the core 20 to be disassembled. During the lifting process, the multiple layers of diaphragms on both sides of the core 20 to be disassembled are pressed, one side is the waste diaphragm to be removed, and the other side is the end diaphragm in the winding direction of the core 20 to be disassembled. The core 20 to be disassembled continues to rise until the diaphragm on one side is separated from the core 20 to be disassembled. After one end of the waste diaphragm is disconnected from the core 20 to be disassembled, it is pressed down into the waste box below to remove the waste diaphragm.

[0083] It can be understood that in this step, pressing the diaphragms unfolded on both sides of the core 20 to be disassembled helps to maintain the stability of the diaphragm during the subsequent lifting process and reduce its sliding or unnecessary tension. When using the clamping mechanism to lift the core 20 to be disassembled, the lifting speed and force are controlled so that the diaphragm on one side is gradually separated from the main body of the core 20 to be disassembled. Too fast a lifting speed or too much force may cause damage to the diaphragm or damage to the internal components of the core 20 to be disassembled.

[0084] According to some embodiments of the present application, referring to Figure 3 , step 130, unfolding a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240, including: while pressing the diaphragms unfolded on both sides of the core 20 to be disassembled, lifting the core 20 to be disassembled until the core 20 to be disassembled rotates at least one circle, and unfolding a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240.

[0085] After the separated diaphragms are removed, the diaphragms unfolded on both sides of the winding core 20 to be disassembled are still in a compressed state, which helps to maintain the stability of the stacked structure and reduce the risk of sliding or deformation during lifting and rotation.

[0086] Continue to lift the core 20 to be disassembled to a sufficient height so that the core 20 to be disassembled can rotate freely, while reducing unnecessary pressure or damage to the internal structure of the core 20 to be disassembled. The core 20 to be disassembled rotates freely during the lifting process, at least one rotation, so as to gradually unfold the stacked structure formed by part of the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240.

[0087] During the rotation process, as the winding core 20 to be disassembled rotates, the stacked structure will gradually unfold, exposing more inner electrode pieces 220 and outer diaphragms 230. At this time, the end position of the cathode electrode piece or the anode electrode piece can be identified by direct measurement.

[0088] It can be understood that by lifting the core 20 to be disassembled until the core 20 to be disassembled rotates at least one circle, the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 can be partially unfolded.

[0089] According to some embodiments of the present application, referring to Figure 3 In step 130, a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 is unfolded and in step 140, the inner diaphragm 210 in the unfolded stacked structure is cut until the inner pole piece 220 is exposed. The method also includes: step 131, identifying the end positions of the inner pole piece 220 and the outer pole piece 240.

[0090] Step 140 is to cut the inner diaphragm 210 in the unfolded stacked structure to expose the inner pole piece 220, which includes: Step 141, based on the end positions of the inner pole piece 220 and the outer pole piece 240, cut the inner diaphragm 210 in the stacked structure, and the cutting position is located on the inner side of the end of the inner pole piece 220 in the winding direction; Step 142, remove the cut inner diaphragm 210 in the unfolded stacked structure to expose the inner pole piece 220.

[0091] After unfolding a part of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240, the end positions of the inner pole piece 220 and the outer pole piece 240 are identified, which can usually be achieved by observing the color, material, shape or markings of the pole pieces. Then, the upper diaphragm of the inner pole piece 220, that is, the inner diaphragm 210 is laser cut by laser, and the inner diaphragm 210 in the unfolded stacked structure is cut off to expose the inner pole piece 220. The cutting position is located on the inner side of the end of the inner pole piece 220 along the winding direction, so that the complete edge of the inner pole piece 220 can be exposed after cutting. Then, the cut free end diaphragm is removed and scrapped by a specific method, such as vacuum negative pressure or adhesive tape.

[0092] It can be understood that, through step 141 and step 142, the inner diaphragm 210 in the stacked structure can be cut off and the inner pole piece 220 can be exposed, providing strong support for the subsequent disassembly process.

[0093] According to some embodiments of the present application, referring to Figure 3 Step 150 is to reverse the winding core 20 to be disassembled based on the winding direction while grasping the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 respectively, so that the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other, including: Step 151, determining the center position of the winding core 20 to be disassembled; Step 152, threading the core 20 to be disassembled based on the center position; Step 153, respectively grasp the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240; Step 154 ​​, driving the core 20 to be disassembled to reverse based on the winding direction, so that the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 are separated from each other.

[0094] After removing the cut inner diaphragm 210 in the unfolded stacked structure and exposing the inner pole piece 220, first determine the center position of the core 20 to be disassembled. This can be achieved through a variety of methods, such as using a dedicated measuring tool to measure the diameter of the core 20 to be disassembled and calculate the center position, or using a visual recognition system to capture the image of the core 20 to be disassembled and determine the center position through an image processing algorithm.

[0095] Exemplarily, a platform may be placed under the core 20 to be disassembled, a pressing plate with a certain pressure may be used to press down the core 20 to be disassembled by gravity, and then the distance between the two pressing plates may be detected, which is the thickness of the core 20 to be disassembled.

[0096] After measuring the thickness of the core 20 to be disassembled, take half of the thickness of the core 20 to be disassembled as the center of the core 20 to be disassembled, insert the double insert pieces into the middle of the core 20 to be disassembled, prop up the double insert pieces, and then insert the pins from the two sides of the propped up, and the pins gradually translate toward the corners on both sides of the core 20 to be disassembled until the tensioning force reaches the set parameters. The pins realize the automatic reversal function, thereby realizing the active unwinding of the core 20 to be disassembled.

[0097] After clamping the outer diaphragm 230, the outer diaphragm 230 can be separated from the remaining parts by vacuum negative pressure or adhesive tape, and then the inner electrode piece 220, the outer electrode piece 240 and the inner diaphragm 210 are adsorbed by vacuum negative pressure respectively, and the three are gradually separated as the core 20 to be disassembled is reversed.

[0098] During the separation process, a tool such as a clamp or a suction cup is used to clamp the outer diaphragm 230 at an appropriate position, and a tool with an adsorption function such as a vacuum suction cup is used to adsorb the inner electrode piece 220, the outer electrode piece 240 and the inner diaphragm 210 at appropriate positions respectively. At this time, the inner electrode piece 220 and the outer electrode piece 240 are both wound on a winding shaft, and then the core 20 to be disassembled is driven to reverse based on the winding direction to separate the inner diaphragm 210, the inner electrode piece 220, the outer diaphragm 230 and the outer electrode piece 240 from each other.

[0099] The reversal of the core 20 to be disassembled can be driven by a reversing device such as a motor or a reducer. First, the reversal parameters, such as the reversal speed and the reversal angle, are set according to the winding direction of the core 20 to be disassembled and the required separation effect. After confirming that all parameters are set correctly, the reversal device is started to drive the core 20 to perform the reversal operation. At the same time, the separation of each component is closely observed during the reversal process.

[0100] It can be understood that, through step 150 , the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 can be successfully separated from each other.

[0101] According to some embodiments of the present application, step 153, respectively grasping the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240, includes: clamping the outer diaphragm 230, adsorbing the inner diaphragm 210, adsorbing the inner pole piece 220, and adsorbing the outer pole piece 240.

[0102] After threading the core 20 to be disassembled based on the center position, tools such as clamps or suction cups can be used to clamp the outer diaphragm 230 at an appropriate position. The clamping position is close to the outer edge of the core 20 to be disassembled so that the outer diaphragm 230 can remain stable during the reversal process. At the same time, tools with adsorption functions such as vacuum suction cups or absorbers are used to adsorb the inner diaphragm 210 at an appropriate position. The inner diaphragm 210 is usually soft and easy to deform. Maintain uniform pressure during adsorption to reduce damage to the diaphragm.

[0103] Similarly, a tool with adsorption function is used to adsorb the appropriate position of the inner electrode piece 220. The inner electrode piece 220 is usually fragile, and adsorption can reduce scratches or damage to it. In addition, the same tool and method as for adsorbing the inner electrode piece 220 are used to adsorb the appropriate position of the outer electrode piece 240. The outer electrode piece 240 is usually tightly fitted with the outer diaphragm 230, and the outer electrode piece 240 is stably grasped during adsorption without causing the outer diaphragm 230 to move.

[0104] It can be understood that, through step 153, the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 can be grasped respectively, providing an important basis for the subsequent reversal operation.

[0105] According to some embodiments of the present application, referring to Figure 3, step 154, driving the core 20 to be disassembled to reverse based on the winding direction, so that the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other, including: based on the winding direction, in the process of reversing and unwinding the core 20 to be disassembled, the inner pole piece 220 and the outer pole piece 240 are respectively wound up by two sets of winding shafts, the outer diaphragm 230 is wound up by the clamping shaft, and the inner diaphragm 210 is wound up by the winding shaft.

[0106] After clamping the outer diaphragm 230, adsorbing the inner diaphragm 210, the inner electrode piece 220 and the outer electrode piece 240, the core 20 to be disassembled is driven to reverse based on the winding direction. In the process of reversing and unwinding the core 20 to be disassembled based on the winding direction, the inner electrode piece 220 and the outer electrode piece 240 can be rewound separately by two sets of rewinding shafts. During the rewinding process, the speed and force of the rewinding shaft are matched with the reversal speed so that the electrode piece can be smoothly unfolded and tightly wound on the rewinding shaft.

[0107] The outer diaphragm 230 is rolled up by the clamping shaft. First, one end of the outer diaphragm 230 is clamped, and then the rolling begins. At this time, the outer diaphragm 230 is located between the inner pole piece 220 and the outer pole piece 240. The clamping shaft can firmly clamp the outer diaphragm 230 without damaging its surface. During the rolling process, the speed and force of the clamping shaft are matched with the reversal speed so that the outer diaphragm 230 can be smoothly unfolded and tightly wound around the clamping shaft.

[0108] The inner diaphragm 210 is rolled up by a winding shaft, which is similar to rolling up the pole piece. However, the inner diaphragm 210 is usually softer and easier to deform. During the rolling process, the speed and force of the winding shaft can be properly controlled to reduce damage to the diaphragm.

[0109] It should be noted that keeping the winding shaft and the clamping shaft clean and contamination-free during winding can reduce the risk of contamination or damage to the components inside the core 20 to be disassembled. In addition, the position, speed and strength of the winding shaft and the clamping shaft can be adjusted and optimized according to actual conditions so that the various components can be separated smoothly and tightly wound on the corresponding shafts.

[0110] It can be understood that, through step 154, the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 can be separated from each other and rolled up on corresponding shafts respectively.

[0111] According to some embodiments of the present application, referring to Figure 3 After the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other, the method further comprises: Step 155, storing the separated inner electrode piece 220 and outer electrode piece 240 into corresponding recycling boxes respectively; Step 156 , removing the coating areas of the separated inner pole piece 220 and the outer pole piece 240 .

[0112] After the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other, the inner pole piece 220 and the outer pole piece 240 will partially sag. At this time, a recycling box can be used to limit the separated inner pole piece 220 and the outer pole piece 240, and a swing rod can be added between the separated inner pole piece 220 and the recycling box or the outer pole piece 240 and the recycling box, so that the inner pole piece 220 and the outer pole piece 240 can be folded in a Z shape and respectively stored in the corresponding recycling boxes.

[0113] After the inner electrode sheet 220 and the outer electrode sheet 240 are folded respectively, the coating areas of the separated inner electrode sheet 220 and the outer electrode sheet 240 are removed. The coating area refers to a certain coating, protective film or adhesive on the electrode sheet. The removal method may include chemical dissolution, physical cutting and thermal decomposition, etc. The corresponding removal tools may include chemical solvents, blades, hot air guns or ultrasonic cleaning machines, etc.

[0114] Exemplarily, the coating area on the electrode sheet can be removed by physical cutting. After the inner electrode sheet 220 and the outer electrode sheet 240 are folded respectively, the folded electrode sheet is turned over to stand upright and then placed on a shaking platform. After shaking, the height of the coating area is identified and a cutter is used to cut the identified part as a whole, thereby obtaining a finished electrode powder.

[0115] It can be understood that, through step 155 and step 156, the separated inner pole piece 220 and outer pole piece 240 can be stored and processed.

[0116] According to some embodiments of the present application, step 155, the separated inner pole piece 220 and the outer pole piece 240 are respectively stored in corresponding recycling bins, including: guiding the separated inner pole piece 220 and the outer pole piece 240 to be folded in a Z shape and stored in the corresponding recycling bins through a rocker rod.

[0117] A swing rod device is arranged above or on one side of the recycling box. The swing rod can swing flexibly and has a certain guiding function so as to guide the inner pole piece 220 and the outer pole piece 240 into the recycling box. The position, height and angle of the swing rod can be adjusted according to the size of the pole piece and the folding requirements.

[0118] After the inner pole piece 220 and the outer pole piece 240 are separated, they can be folded in a Z shape by the guidance of different swing rods. The swing rods maintain a stable speed and force during the guiding process so that the inner pole piece 220 and the outer pole piece 240 can be folded smoothly and fall into the recycling box.

[0119] The main function of the recycling box is to receive and store the inner electrode sheets 220 and the outer electrode sheets 240 separated and dropped from the reel 20 to be disassembled. These electrode sheets are key components in lithium-ion batteries and have high recycling value. The recycling box is arranged under the winding shaft. After the inner electrode sheets 220 and the outer electrode sheets 240 are folded respectively, the electrode sheets can fall smoothly into the recycling box without the need for additional transmission or movement steps. The recycling box usually has a large capacity to accommodate multiple electrode sheets separated from the reel 20 to be disassembled. The recycling box can also be movable for easy transportation.

[0120] It can be understood that the recycling box can safely and orderly collect the pole pieces separated from the winding core 20 to be disassembled, which helps to improve the disassembly efficiency.

[0121] According to some embodiments of the present application, see Figure 1-Figure 3 As shown, the present application provides a disassembly process for a double-roll core 20, including: unfolding the outer diaphragm 230 of the core 20 to be disassembled; identifying the winding direction of the diaphragm of the core 20 to be disassembled; unfolding a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240; cutting the inner diaphragm 210 in the unfolded stacked structure to expose the inner pole piece 220; while grasping the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 respectively, reversing the core 20 to be disassembled based on the winding direction to separate the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 from each other.

[0122] The outer diaphragm 230 of the core 20 to be disassembled is unfolded. The core 20 to be disassembled can be softened first, and then the outer diaphragm of the outer pole piece 240 of the core 20 to be disassembled that has been softened can be cut by CO2 laser, and then the cut diaphragm can be unfolded.

[0123] After the outer diaphragm 230 of the core 20 to be disassembled is unfolded, the winding direction of the diaphragm of the core 20 to be disassembled can be identified, and then, while the unfolded diaphragms on both sides of the core 20 to be disassembled are pressed, the core 20 to be disassembled is lifted until the diaphragm on one side is separated from the core 20 to be disassembled, and the separated diaphragm is removed at the same time.

[0124] After removing the separated diaphragm, a portion of the stacked structure formed by the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 is unfolded, and the end positions of the inner pole piece 220 and the outer pole piece 240 are identified at the same time. Then, based on the end positions of the inner pole piece 220 and the outer pole piece 240, the inner diaphragm 210 in the stacked structure is cut off, and the cutting position is located on the inner side of the end of the inner pole piece 220 in the winding direction. Finally, the cut inner diaphragm 210 in the unfolded stacked structure is removed to expose the inner pole piece 220.

[0125] While grasping the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 respectively, the winding core 20 to be disassembled is reversed based on the winding direction so that the inner diaphragm 210 , the inner pole piece 220 , the outer diaphragm 230 and the outer pole piece 240 are separated from each other.

[0126] First, determine the center position of the core 20 to be disassembled, and thread the core 20 to be disassembled based on the center position, then clamp the outer diaphragm 230, and respectively adsorb the inner diaphragm 210, the inner pole piece 220 and the outer pole piece 240, and based on the winding direction, in the process of reverse unwinding the core 20 to be disassembled, respectively wind up the inner pole piece 220 and the outer pole piece 240 through two sets of winding shafts, wind up the outer diaphragm 230 through the clamping shaft, and wind up the inner diaphragm 210 through the winding shaft, so that the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other.

[0127] After the inner diaphragm 210, the inner pole piece 220, the outer diaphragm 230 and the outer pole piece 240 are separated from each other, the separated inner pole piece 220 and the outer pole piece 240 are folded in a Z shape and stored in the corresponding recycling box guided by the rocker rod. Finally, the coating areas of the separated inner pole piece 220 and the outer pole piece 240 are removed to complete the disassembly of the core 20 and the separation of the pole pieces in the core 20.

[0128] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0129] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-roll core disassembly process, characterized in that: include: Unfold the outer diaphragm of the core to be disassembled; Identify the winding direction of the diaphragm of the winding core to be disassembled; unfolding a portion of a stacked structure formed by an inner diaphragm, an inner pole piece, an outer diaphragm and an outer pole piece; Cutting the inner diaphragm in the unfolded stacked structure until the inner electrode sheet is exposed; While grasping the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece respectively, the winding core to be disassembled is reversed based on the winding direction to separate the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece from each other.

2. The disassembly process of the double-roll core according to claim 1, characterized in that: The step of unfolding the outer diaphragm of the core to be disassembled comprises: Soften the core to be disassembled; Cut off the diaphragm of the outer layer of the outer electrode of the softened winding core to be disassembled; Unfold the severed diaphragm.

3. The disassembly process of the double-roll core according to claim 2, characterized in that: The method of cutting off the softened diaphragm of the outer layer of the outer electrode sheet of the winding core to be disassembled comprises: The outer layer of the outer pole piece of the softened winding core to be disassembled is cut off by CO2 laser.

4. The disassembly process of the double-roll core according to claim 1, characterized in that: The step of identifying the winding direction of the diaphragm of the winding core to be disassembled comprises: Press the unfolded diaphragms on both sides of the roll core to be disassembled; Lift the core to be disassembled to tension the diaphragm on one side; Obtain the rotation direction of the core to be disassembled when it is lifted; The winding direction of the membrane of the winding core to be disassembled is determined based on the rotation direction.

5. The disassembly process of the double-roll core according to claim 1, characterized in that: Between identifying the winding direction of the diaphragm of the winding core to be disassembled and unfolding a portion of the stacked structure formed by the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece, the disassembling process further includes: While pressing the membranes unfolded on both sides of the core to be disassembled, the core to be disassembled is lifted until the membrane on one side is separated from the core to be disassembled; Remove the separated diaphragm.

6. The disassembly process of the double-roll core according to claim 1, characterized in that: The step of unfolding a portion of the stacked structure formed by the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece comprises: While pressing the unfolded diaphragms on both sides of the core to be disassembled, lift the core to be disassembled until it rotates at least one circle, and unfold the stacked structure formed by part of the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece.

7. The disassembly process of the double-roll core according to claim 1, characterized in that: Between unfolding a portion of the stacked structure formed by the inner diaphragm, the inner electrode piece, the outer diaphragm and the outer electrode piece and cutting the inner diaphragm in the unfolded stacked structure to expose the inner electrode piece, the disassembly process further includes: identifying the end positions of the inner electrode piece and the outer electrode piece; The step of cutting the inner diaphragm in the unfolded stacked structure to expose the inner electrode sheet comprises: Based on the end positions of the inner electrode sheet and the outer electrode sheet, the inner diaphragm in the stacked structure is cut, and the cutting position is located on the inner side of the end of the inner electrode sheet in the winding direction; The cut inner diaphragm in the unfolded stacked structure is removed to expose the inner pole piece.

8. The disassembly process of the double-roll core according to claim 1, characterized in that: The method of reversing the winding core to be disassembled based on the winding direction while respectively grasping the inner diaphragm, the inner electrode piece, the outer diaphragm and the outer electrode piece, so as to separate the inner diaphragm, the inner electrode piece, the outer diaphragm and the outer electrode piece from each other, comprises: Determine the center position of the core to be disassembled; Based on the center position, the core to be disassembled is threaded; Grasp the inner diaphragm, inner pole piece, outer diaphragm and outer pole piece respectively; The winding core to be disassembled is driven to reverse based on the winding direction, so that the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece are separated from each other.

9. The disassembly process of the double-roll core according to claim 8, characterized in that: The method of respectively grasping the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece comprises: Clamp the outer diaphragm, adsorb the inner diaphragm, adsorb the inner electrode sheet, and adsorb the outer electrode sheet.

10. The disassembly process of the double-roll core according to claim 8, characterized in that: The method of driving the core to be disassembled to reverse based on the winding direction so as to separate the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece from each other comprises: Based on the winding direction, during the process of reverse unwinding the reel to be disassembled, the inner electrode sheet and the outer electrode sheet are respectively wound up by two sets of winding shafts, the outer diaphragm is wound up by the clamping shaft, and the inner diaphragm is wound up by the winding shaft.

11. The disassembly process of the double-roll core according to claim 1, characterized in that: After the inner diaphragm, the inner pole piece, the outer diaphragm and the outer pole piece are separated from each other, the disassembly process further includes: The separated inner electrode pieces and outer electrode pieces are stored in corresponding recycling boxes respectively; The coated areas of the separated inner and outer pole pieces are removed.

12. The disassembly process of the double-roll core according to claim 11, characterized in that: The separated inner electrode sheets and outer electrode sheets are respectively stored in corresponding recycling boxes, including: The separated inner and outer electrodes are guided by the swing rod to be folded in a Z shape and stored in the corresponding recycling box.

Images