Recycling method and recycling device for laminated pole core

Abstract

The embodiment of the present application provides a method and device for recycling a laminated pole core, and the recycling method is used for recycling unqualified laminated pole cores. The method for recycling the laminated pole core includes: cutting the set position of the circumferential side of the laminated pole core; moving the pole ear to a preset position so that the pole piece is at least partially exposed from the laminated pole core; clamping the pole ear and / or the pole piece, and pulling the pole piece out of the laminated pole core, which can ensure the efficiency of independent recovery of the pole piece in the laminated pole core. Moreover, the degree of damage to the pole piece when the pole piece is pulled out of the laminated pole core is low, which ensures the integrity of the pole piece recovery, thereby improving the recovery rate of the pole piece.

Description

Technical Field

[0001] The present application belongs to the technical field of battery recycling, and specifically, the present application relates to a recycling method and a recycling device for laminated pole cores. Background Art

[0002] Batteries are generally composed of positive and negative electrodes formed by current collectors with active materials such as lithium metal or lithium alloy attached, separators separating the positive and negative electrodes, and electrolytes formed by non-aqueous electrolyte solutions. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high requirements. If the above-mentioned active materials are not recycled and discarded into the environment, it will have a great impact on the environment.

[0003] Existing battery recycling all adopts destructive recycling, such as mechanical crushing, high-temperature calcination, etc. However, this type of recycling method is unable to classify and process different materials in the battery, resulting in low recycling rate and serious environmental pollution. Summary of the invention

[0004] One purpose of the embodiments of the present application is to provide a new technical solution for a method and device for recycling laminated pole cores.

[0005] According to a first aspect of an embodiment of the present application, a method for recycling a laminated pole core is provided, which is used for recycling unqualified laminated pole cores, comprising:

[0006] Cutting the set position of the circumferential side of the laminated core;

[0007] Moving the pole lug to a preset position so that the corresponding pole piece is at least partially exposed from the laminated pole core;

[0008] Clamp the pole lug and / or the pole piece, and pull the pole piece out of the laminated pole core.

[0009] Optionally, the set position of the circumferential side of the laminated pole core includes the corner position of the laminated pole core.

[0010] Optionally, the laminated pole core is a rectangular parallelepiped pole core, and the laminated pole core forms a cutting area at four corners of its large surface, and the cutting area has a cutting edge. The setting position for cutting the circumference of the laminated pole core includes:

[0011] The laminated pole core is cut from the cutting edge along the pole piece stacking direction.

[0012] Optionally, before the pole lug is moved to a preset position, the method further includes performing a shaping process on the pole piece near the corresponding pole lug, wherein the shaping process includes:

[0013] The laminated pole core is subjected to a rolling operation.

[0014] Optionally, the direction in which the pole piece is pulled out from the laminated pole core is parallel to the plane where the pole piece is located.

[0015] Optionally, the pole lugs in the laminated pole core extend from both sides of the laminated pole core, and the step of extracting the pole piece from the laminated pole core includes:

[0016] The two pole pieces respectively connected to the two pole ears are simultaneously pulled out from both sides of the laminated pole core.

[0017] Optionally, before cutting the set position of the circumferential side of the laminated core, the method further comprises:

[0018] The pole ear welding part of the laminated pole core is cut.

[0019] Optionally, moving the tab to a preset position includes:

[0020] The pole lug is sucked and moved in a direction away from the laminated pole core so that the pole lug is in a preset position.

[0021] Optionally, moving the tab to a preset position includes:

[0022] The pole lug is moved in a direction along the pole sheet stacking direction of the laminated pole core to be away from the laminated pole core and / or the pole lug is moved in a plane direction of the laminated pole core to be away from the laminated pole core.

[0023] Optionally, clamping the pole lug and / or the pole piece and extracting the pole piece from the laminated pole core comprises:

[0024] A gripping area for clamping the pole piece has a size that is less than one tenth of the length of the pole piece in the length direction of the pole piece.

[0025] Optionally, while clamping the pole lug located at the preset position and pulling out the pole piece connected to the pole lug from the laminated pole core, the method further includes:

[0026] The laminated core is heated at a temperature ranging from 100°C to 140°C.

[0027] According to a second aspect of an embodiment of the present application, a recovery device for a laminated pole core is provided, comprising:

[0028] A cutting assembly, the cutting assembly is used to cut the set position of the peripheral side of the laminated pole core to separate the peripheral side of the pole piece in the laminated pole core from the peripheral side of the diaphragm;

[0029] A suction assembly, the suction assembly is used to suck the pole ear and move the pole ear to a preset position so that the pole piece is at least partially exposed from the laminated pole core;

[0030] A clamping assembly is used to clamp the pole lug and / or the pole piece and extract the pole piece from the laminated pole core.

[0031] One technical effect of the present application is that: the embodiment of the present application provides a method for recycling laminated pole cores, and the recycling method is used for recycling unqualified laminated pole cores. The technical solution of the present application is aimed at the assembly characteristics of the laminated pole core, and effectively eliminates the adhesion of components such as diaphragms and pole ears when removing the pole pieces, which can ensure the efficiency of independent recycling of the pole pieces in the laminated pole core.

[0032] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0034] Figure 1 A flow chart of a method for recycling a laminated pole core provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of a pole piece of a method for recycling a laminated pole core provided in an embodiment of the present application;

[0036] Figure 3 for Figure 2 A in the enlarged view;

[0037] Figure 4 A schematic diagram of a shaping assembly of a laminated pole core recovery device provided in an embodiment of the present application shaping a pole piece;

[0038] Figure 5 A schematic diagram of a support assembly of a laminated pole core recovery device provided in an embodiment of the present application supporting a pole lug of a pole piece;

[0039] Figure 6 A schematic diagram of a laminated pole core recovery device for extracting pole pieces provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of the recovery of pole pieces by a recovery box of a laminated pole core recovery device provided in an embodiment of the present application.

[0041] Among them: 1. Cutting component; 2. Shaping component; 3. Suction component; 4. Clamping component; 5. Recycling box; 6. Support component. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0044] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0045] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0046] It should be noted that similar reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in the subsequent figures. Figure 1 , the embodiment of the present application provides a method for recycling laminated pole cores, and the recycling method is used for recycling unqualified laminated pole cores generated in the production process, and the unqualified laminated pole cores may include unqualified laminated pole cores disassembled from unqualified battery cells, and may also include unqualified laminated pole cores directly obtained in the production process. For example, unqualified pole cores caused by problems such as local material loss of pole pieces, uneven coating thickness of active layers on pole pieces, or local breakdown of pole pieces during the production of battery cells. During the production and processing of battery cells, the pole cores loaded into the battery cells and the battery cells as a whole will be screened for quality. Pole cores and pole pieces may be identified as unqualified pole cores due to defects such as size mismatch and local material loss. Battery cells may also be considered unqualified due to problems such as shell sealing. This type of output will be eliminated from the production line. But in fact, most of the pole pieces in this type of output can perform normally, and only some are damaged or unqualified. In this regard, the present application provides a method for recycling unqualified outputs in production, and after eliminating defects in the pole cores and pole pieces in the unqualified outputs, they can be effectively used in other products to improve production capacity and material utilization.

[0047] The recycling method is used for recycling unqualified laminated pole cores produced in the production process of laminated pole cores, and the recycling method comprises:

[0048] S101, cutting the set position of the circumference of the laminated core;

[0049] Specifically, the laminated pole core includes one or more groups of laminates, and the pole sheets in the laminated pole core include positive pole sheets and negative pole sheets. A group of laminates may include a positive pole sheet, a negative pole sheet and a separator separating the positive pole sheet and the negative pole sheet, that is, a layer of positive pole sheet, a layer of separator and a layer of negative pole sheet are sequentially adhered; and when the laminated pole core includes multiple groups of laminates, the multiple groups of laminates are stacked and can be separated by a separator.

[0050] During the preparation of the laminated pole core, the width of the diaphragm will be greater than the width of the negative electrode sheet, and similarly, the width of the diaphragm will be greater than the width of the positive electrode sheet, so the diaphragm will completely cover the pole sheet after the pole sheets are stacked. And during the pole core forming process, the upper and lower layers of the diaphragm will be connected together to ensure the reliability of the overall pole core. Therefore, the embodiment of the present application is described using the above-mentioned laminated pole core as an example. In addition, in the related art, some laminated pole cores are made without connecting the upper and lower diaphragms. The laminated pole core can also apply the solution of this case, but the pole core needs to be pressed along the stacking direction to prevent the diaphragm from falling off and affecting the extraction of the pole sheet.

[0051] During the preparation of the laminated core, since the positive and negative electrode sheets will generate bonding forces with the diaphragm when they are bonded to the diaphragm, especially during the formation process of the laminated core, local positions on the circumferential sides of the electrode sheets in the laminated core will be connected to local positions on the circumferential sides of the diaphragm. The set position on the circumferential side of the laminated core can be the connection position between the electrode sheets and the diaphragm, and the formation of the connection position between the electrode sheets and the diaphragm will hinder the separation of the electrode sheets and the diaphragm when the electrode sheets and the diaphragm are recovered.

[0052] The recycling method provided in the embodiment of the present application first cuts the set position of the circumferential side of the laminated pole core, and the circumferential side of the laminated pole core is the area formed by the outer peripheral side of the pole sheet in the laminated pole core and the outer peripheral side of the diaphragm. For example, the set position of the circumferential side of the laminated pole core is cut off from the laminated pole core by using a cutting knife, so as to facilitate the separation of the circumferential side of the pole sheet in the laminated pole core from the circumferential side of the diaphragm, that is, the rapid separation between the pole sheet and the diaphragm in the laminated pole core can be achieved, thereby ensuring the efficiency of the separate recovery of the pole sheet and the diaphragm in the laminated pole core.

[0053] In addition, during the manufacturing process of the laminated pole core, the ceramic area on the pole ear side of the pole piece in the laminated pole core will form hard lumps due to excessive heat pressure, which will affect the extraction of the pole piece. Therefore, the embodiment of the present application cuts the set position on the side of the laminated pole core to reduce the scraping of the diaphragm on the pole piece during the extraction of the pole piece, thereby reducing the damage of the diaphragm to the pole piece. In addition, cutting the set position on the side of the laminated pole core first can also release the tension of the diaphragm on the short side of the pole core, making the diaphragm loose at the outlet (i.e., the pole ear side), facilitating the subsequent extraction of the pole piece and ensuring the extraction integrity of the pole piece.

[0054] S102, moving the pole ear to a preset position so that the corresponding pole piece is at least partially exposed from the laminated pole core;

[0055] Specifically, when the laminated pole core includes multiple groups of laminates, multiple pole ears on the multiple groups of laminates will be attached to each other, for example, the positive pole ears on the multiple pole sheets will be attached to each other, and the negative pole ears on the multiple pole sheets will also be attached to each other. In order to facilitate the removal of multiple pole sheets in the multiple groups of laminates from the laminated pole core in sequence, the multiple attached pole ears must first be separated, such as sucking the pole ears to separate the multiple attached positive pole ears in sequence. Furthermore, pulling out a single pole ear can pull out at least a portion of the structure of the corresponding pole sheet, thereby exposing it from the laminated pole core, which is convenient for suction or clamping.

[0056] The recycling method provided in the embodiment of the present application can suck the pole ear and move the pole ear to a preset position, specifically, the uppermost or lowermost pole ear among a plurality of pole ears bonded together can be sucked by a suction cup, and then the sucked pole ear can be moved to a preset position, so that the sucked pole ear can be separated from other pole ears, so that the pole piece connected to the pole ear can be taken out from the laminated pole core through the separated pole ear. The sucked pole ear can bring out the pole piece connected to it, so as to extract at least a part of the pole piece from the diaphragm and the laminated pole core.

[0057] In addition, since the sizes of pole pieces vary, for example, the pole piece length of the battery used in small electronic devices such as mobile phones is a few centimeters or more than ten centimeters, while the pole piece length of the battery used in large equipment such as vehicles can reach several meters. In order to facilitate the complete extraction of the pole piece from the laminated pole core, the pole ear can be moved to a preset position first, so that the corresponding pole piece is at least partially exposed from the laminated pole core, so that the subsequent pole piece can be more completely extracted from the pole core.

[0058] S103, clamping the pole lug located at the preset position, and / or clamping the exposed pole piece, and pulling the pole piece out of the laminated pole core.

[0059] Specifically, the difficulty of extracting the subsequent pole piece has been reduced after the step S102, so it is only necessary to clamp the pole ear and / or the pole piece to extract the corresponding pole piece from the laminated pole core. In one embodiment of the present application, since the pole ear is connected to the pole piece, it is possible to select the pole ear to drive the pole piece to be extracted. This solution needs to ensure that the pole piece and the pole ear are always connected when the pole ear is clamped to extract the pole piece, so as to completely remove the pole piece. Of course, in other embodiments of the present application, the pole piece can also be directly selected to extract the entire pole piece from the laminated pole core.

[0060] The recycling method of the laminated pole core provided in the embodiment of the present application is for peeling and recycling the pole pieces stacked in the laminated pole core to prevent damage to the pole pieces. The diaphragms, pole pieces, pole ears and other components in the laminated pole core are tightly connected to each other and are not easy to separate. The technical solution of the present application gradually pulls out the pole pieces through steps such as cutting and pulling out the pole ears, thereby ensuring the efficiency of independent recycling of the pole pieces in the laminated pole core and effectively pulling out the pole pieces. Furthermore, the degree of damage to the pole pieces when the pole pieces are pulled out from the laminated pole core is low, thereby ensuring the integrity of the pole piece recycling and improving the recovery rate of the pole pieces.

[0061] Furthermore, the recycling method further comprises: after the pole piece is pulled out from the laminated pole core, repeating steps S102 to S103 until all the pole pieces in the laminated pole core are pulled out from the laminated pole core.

[0062] Specifically, after completing steps S101 to S103, the pole pieces of the laminated pole core can be recycled, and the pole pieces can be used for manufacturing new batteries after being processed. After completing the extraction of one pole piece, steps S102 to S103 are repeated to complete the extraction of the pole pieces of the entire laminated pole core.

[0063] Optionally, the set position of the circumferential side of the laminated pole core includes the corner position of the laminated pole core.

[0064] Specifically, the corner position of the laminated core is the position where the corner of the pole piece and the corner of the diaphragm in the laminated core fit together, and in the process of preparing the laminated core, the corner of the pole piece and the corner of the diaphragm are easily combined with each other to form a connection. In order to avoid obstacles to the separation of the pole piece and the diaphragm when the pole piece and the diaphragm are recycled, a cutter can be used to cut the corner position of the laminated core to ensure the rapid separation of the pole piece and the diaphragm in the laminated core.

[0065] In addition, the set position of the circumferential side of the laminated pole core may also include the edge position of the laminated pole core, so that after cutting the edge position of the laminated pole core, the pole pieces and diaphragms in the laminated pole core can be quickly separated.

[0066] Alternatively, see Figure 1 and Figure 2 The laminated pole core is a rectangular parallelepiped pole core, and the laminated pole core forms cutting areas at the four corners of its large surface, such as Figure 2 The A area in the cutting area has a cutting edge; the setting position for cutting the peripheral side of the laminated core includes:

[0067] The laminated pole core is cut from the cutting edge along the pole piece stacking direction.

[0068] Specifically, the cutting edge may be an L-shaped edge or an arc-shaped edge. Figure 3 The cutting edge is an L-shaped edge. After the laminated pole core is cut from the cutting edge along the pole piece stacking direction, the cutting area has a first dimension parallel to the length direction of the laminated pole core and a second dimension parallel to the width direction of the laminated pole core. The first dimension ranges from 8mm to 15mm, and the second dimension ranges from 3mm to 8mm.

[0069] Specifically, the large surface of the laminated pole core can be the surface in the length and width direction of the laminated pole core (that is, the surface in the stacking direction of the laminated pole core). When the laminated pole core forms cutting areas at the four corners of its large surface, cutting tools such as pneumatic scissors can be used to cut the four corners of the laminated pole core, and the cut waste falls into the waste collection device.

[0070] See also Figure 3 The cutting area may have a first dimension X parallel to the length direction of the laminated core and a second dimension Y parallel to the width direction of the laminated core, the first dimension X ranges from 8 mm to 15 mm, and the second dimension Y ranges from 3 mm to 8 mm.

[0071] The recycling method provided in the embodiment of the present application can reduce the scratching between the pole pieces in the laminated pole core and the diaphragm during the extraction process of the pole pieces, thereby ensuring the integrity of the pole piece separation, by cutting the four corners of the laminated pole core from the cutting edge along the pole piece stacking direction; in addition, after cutting the four corners of the laminated pole core, the tensioning force of the diaphragm on the short side of the laminated pole core can be released, making the edge of the diaphragm loose, which can greatly improve the success rate of pole piece extraction and ensure the extraction integrity of the pole pieces.

[0072] In a specific embodiment, the first dimension X of the cutting area can be 10 mm, and the second dimension X of the cutting area can be 5 mm. In addition, four independent cutters can be used to cut the four corners of the laminated core, or the four cutters can be matched in pairs to form two groups of cutters to improve the efficiency of cutting the laminated core. In addition, in other embodiments, the shape of the cutting area can be a triangle, a semicircle, etc., which can be selected based on needs and requirements.

[0073] Optionally, before the pole lug is moved to a preset position, the method further includes performing a shaping process on the pole piece near the corresponding pole lug, wherein the shaping process includes:

[0074] The laminated pole core is subjected to a rolling operation.

[0075] Specifically, when the pole ear is provided on the pole piece, the exposed foil area where the pole ear is provided can be cleaned on the pole piece first, and then the pole ear can be welded to the exposed foil area of ​​the pole piece; or the pole ear can be cut out at the position where the coating is not performed on the pole piece. This makes the pole piece near the corresponding pole ear uneven, which makes it easy for the diaphragm to stick to the pole piece near the corresponding pole ear.

[0076] The recycling method provided in the embodiment of the present application is capable of separating the pole sheet and the diaphragm in the laminated pole core after the pole sheet near the corresponding pole ear is subjected to shaping treatment, such as rolling the pole sheet near the corresponding pole ear to keep the pole sheet near the corresponding pole ear flat.

[0077] Optionally, ceramic is provided on the pole piece near the corresponding pole ear. Figure 6 Before the second step of moving the pole ear to a preset position, the pole piece near the corresponding pole ear may be shaped, including:

[0078] The laminated pole core is subjected to rolling processing, for example, the position where the ceramic is provided on the pole piece is subjected to rolling operation, so as to release the bonding between the diaphragm and the pole piece, that is, the diaphragm and the pole piece can be separated. In actual processing, the ceramic material is more easily separated from the diaphragm.

[0079] Specifically, when ceramics are arranged on the pole piece near the corresponding pole ear, the ceramics can be used to reduce the burrs generated during die cutting on the pole piece, thereby ensuring the neatness of the edge of the pole piece; and the arrangement of the ceramics can also form a bond with the edge of the pole piece to avoid the problem of short circuit caused by contact between the positive pole ear and the negative pole ear.

[0080] In the recycling method provided in the embodiment of the present application, the laminated pole core is subjected to a rolling operation. Specifically, the cam bearing follower can be used to squeeze and roll the pole piece near the corresponding pole ear to shape the diaphragm, pole piece and ceramic at this location, thereby separating the diaphragm, pole piece and ceramic to a certain extent and reducing the resistance to the pole piece extraction. In addition, by rolling the position where the ceramic is provided on the pole piece, the multiple pole ears can also be loosened, making it easier for the suction cup to absorb the pole ears when the pole piece is subsequently extracted.

[0081] Alternatively, see Figure 1 and Figure 6 , the direction in which the pole piece is pulled out from the laminated pole core is parallel to the plane where the pole piece is located.

[0082] Specifically, when multiple pole pieces in the laminated pole core are bonded, the plane where the pole pieces are located is parallel to the large surface of the laminated pole core. When the direction in which the pole piece is pulled out from the laminated pole core is parallel to the plane where the pole piece is located, that is, the pole piece is pulled out parallel to the plane where the pole piece is located, bending of the pole piece during pulling out can be avoided, thereby ensuring the flatness and integrity of the pole piece.

[0083] Optionally, the pole lugs in the laminated pole core extend from both sides of the laminated pole core, and the step of extracting the pole piece from the laminated pole core includes:

[0084] The two pole pieces respectively connected to the two pole ears are simultaneously pulled out from both sides of the laminated pole core.

[0085] Specifically, the tabs in the laminated pole core extend from both sides of the laminated pole core, that is, tabs are formed at both ends of the laminated pole core. For example, on a positive pole sheet and a negative pole sheet that are bonded to each other in the laminated pole core, a first tab is formed on the left side of a positive pole sheet, and a second tab is formed on the right side of a negative pole sheet. When the positive pole sheet is pulled out from the left side through the first tab, the negative pole sheet can be pulled out from the right side through the second tab, so as to improve the efficiency of pole sheet pulling out, and ensure that the positive pole sheet and the negative pole sheet are well classified when pulled out.

[0086] In addition, the pole ears in the laminated pole core can extend from two opposite sides of the laminated pole core, or from two adjacent sides of the laminated pole core, and the efficiency of pole piece extraction can be improved by simultaneously extracting the pole pieces from both sides.

[0087] Optionally, before cutting the set position of the circumferential side of the laminated core, the method further comprises:

[0088] The pole ear welding part of the laminated pole core is cut.

[0089] Specifically, when the laminated core includes multiple groups of laminates, multiple positive tabs on multiple positive sheets in the laminated core can be welded together after being attached to each other, for example, multiple positive tabs are welded together on the side away from the positive sheet, which creates obstacles for the separation of multiple positive sheets. The recycling method provided in the embodiment of the present application can ensure the efficiency of separation between multiple positive sheets when cutting the tab welding part of the laminated core, that is, by cutting the weld marks between multiple tabs.

[0090] When recycling the laminated core without the pole lugs welded thereto after lamination, it is not necessary to cut the welding parts of the pole lugs of the laminated core.

[0091] In addition, before cutting the welding parts of the tabs of the laminated pole core, film removal and tab shaping may be included. Film removal may be performed by a film scribing mechanism to remove the plastic film used as a protective film on the surface of the laminated pole core. Tab shaping may be performed by rolling a plurality of tabs bonded together to disperse the plurality of tabs for facilitating the absorption and clamping of the tabs.

[0092] Alternatively, see Figure 1 and Figure 6 , moving the tab to a preset position includes:

[0093] The pole lug is sucked and moved in a direction away from the laminated pole core so that the pole lug is in a preset position.

[0094] Specifically, since the thickness of the tab is small, the tab is sucked and moved away from the pole core to reduce the damage rate of the tab. The preset position is generally a position away from the laminated pole core.

[0095] Optionally, moving the tab to a preset position includes:

[0096] The pole lug is moved in a direction along the pole sheet stacking direction of the laminated pole core to be away from the laminated pole core and / or the pole lug is moved in a plane direction of the laminated pole core to be away from the laminated pole core.

[0097] When the technical solution of the present application is actually applied, various methods can be used to move the tab to the preset position. For example, in the first embodiment of the present application, the tab can be moved along a direction parallel to the stacking direction of the pole pieces of the laminated pole core, so that the tab is first moved upward by a certain distance, and the pole piece is partially pulled out, such as Figure 6 In the second embodiment of the present application, the pole ear can also be moved in a direction parallel to the large plane of the laminated pole core, so that the pole ear is laterally away from the laminated pole core to pull out part of the pole piece, as shown in FIG. Figure 6 The above two methods can be used in one or two ways in sequence. The specific method can be determined according to the selection of the preset position.

[0098] In the first embodiment, specifically, since multiple tabs in the laminated pole core need to be connected as a whole and then connected to the electrode lead-out sheet to serve as the positive and negative poles of the laminated battery. Therefore, when the pole piece is separated, the tab is generally connected to the pole piece, so the tab of the top pole piece must be separated from the other tabs first, and then moved to improve the integrity of subsequent extraction. Furthermore, the tab of the top pole piece can be sucked and pulled upward to be flush with the topmost diaphragm, and then the pole piece can be pulled out about 3mm-5mm in the direction away from the laminated battery core. Since the laminated pole core has been cut and shaped, the force for pulling the pole piece out can be about 3N-15N, which improves the convenience of pulling out the pole piece.

[0099] After the sucked pole ear is separated from other pole ears, the pole ear at the preset position can be clamped by a mechanical chuck with a longer stroke and the pole piece connected to the pole ear can be pulled out, until the pole piece is completely separated from the diaphragm and the chuck releases the pole piece. The coordination of the sucking operation and the clamping operation ensures the stability of the pole piece extraction.

[0100] In the second embodiment, the tabs of some laminated cells are already separated, and in this case, the tabs do not need to be separated to move them to the predetermined positions.

[0101] Optionally, while clamping the pole lug located at the preset position and pulling out the pole piece connected to the pole lug from the laminated pole core, the method further includes:

[0102] The laminated core is heated at a temperature ranging from 100°C to 140°C.

[0103] Specifically, during the preparation of the laminated core, since the positive and negative electrodes will generate a bonding force with the diaphragm when they are attached to the diaphragm, especially during the formation of the laminated core, the local positions on the peripheral sides of the electrodes in the laminated core will be connected to the local positions on the peripheral sides of the diaphragm. In order to avoid the influence of the connection between the diaphragm and the electrode on the extraction of the electrode, the laminated core can be heated to soften the diaphragm at a high temperature of 100-140°C to separate the diaphragm and the electrode. For example, a hot air blowing device is added to the adhesion between the diaphragm and the electrode, and the outlet air temperature of the hot air device can make the diaphragm begin to soften at 120°C.

[0104] Further optionally, when pulling out the pole piece of the laminated pole core, the pole ear and the pole piece can be fixed at the same time, or the pole ear and the pole piece can be fixed separately, and the operation of removing the pole piece can be further performed. For the implementation method of clamping and sucking the pole piece, the position of clamping and sucking can be controlled to further reduce the impact on the pole piece when the pole piece is extracted. For example, it can be pre-determined that there is a suitable grasping area on the pole piece. Optionally, along the length direction of the pole piece, the length dimension of the grasping area is less than one tenth of the overall length dimension of the pole piece. In this way, it is determined that the grasping area is close to the pole ear, and grasping here can reduce the risk of fracture between the pole piece and the pole ear. In addition, if the pole ear is grasped at the same time, it is conducive to the coordination consistency of the withdrawal movement after grasping.

[0105] See also Figures 2 to 7 , the embodiment of the present application provides a recovery device for a laminated core, the recovery device comprising:

[0106] A cutting assembly 1, the cutting assembly 1 is used to cut the set position of the peripheral side of the laminated pole core, so as to separate the peripheral side of the pole piece in the laminated pole core from the peripheral side of the diaphragm;

[0107] A shaping component 2, the shaping component 2 is used to shape the pole piece near the corresponding pole ear;

[0108] A suction assembly 3, the suction assembly 3 is used to suck the pole ear and move the pole ear to a preset position, so that at least a part of the pole piece in the laminated pole core can be exposed;

[0109] The clamping assembly 4 is used to clamp the pole lug and / or pole piece located at the preset position, and to extract the pole piece connected to the pole lug from the laminated pole core.

[0110] Specifically, in the recovery device of the laminated pole core provided in the embodiment of the present application, the cutting assembly 1 cuts the set position of the circumference of the laminated pole core to separate the circumference of the pole piece in the laminated pole core from the circumference of the diaphragm; the shaping assembly 2 can shape the pole piece near the corresponding pole ear; the suction assembly 3 can suck the pole ear and move the pole ear to a preset position; the clamping assembly 4 can clamp the pole ear at the preset position and extract the pole piece connected to the pole ear from the laminated pole core, which can ensure the efficiency of independent recovery of the pole piece in the laminated pole core. Moreover, the degree of damage to the pole piece when the pole piece is extracted from the laminated pole core is low, which ensures the integrity of the pole piece recovery, thereby improving the recovery rate of the pole piece.

[0111] In addition, the recycling device also includes a recycling box 5 and a support assembly 6. The support assembly 6 can be a cylinder for supporting the sucked pole ears. The extracted pole pieces can naturally fall into the recycling box 5 to complete the recycling of the pole pieces.

[0112] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A method for recycling laminated pole cores, used for recycling unqualified laminated pole cores, characterized in that: include: Cutting the set position of the circumferential side of the laminated core; Moving the pole lug to a preset position so that the corresponding pole piece is at least partially exposed from the laminated pole core; Clamping the pole lug and / or the pole piece, and pulling the pole piece out of the laminated pole core; Wherein, the set position is the connection position between the pole piece and the diaphragm; The step of moving the tab to a preset position includes: Suctioning the pole lug and moving the pole lug in a direction away from the laminated pole core so that the pole lug is in a preset position; While clamping the pole lug located at the preset position and pulling out the pole piece connected to the pole lug from the laminated pole core, the method further includes: The laminated core is heated at a temperature ranging from 100°C to 140°C.

2. The recycling method according to claim 1, characterized in that: The set position of the circumferential side of the laminated pole core includes the corner position of the laminated pole core.

3. The recycling method according to claim 2, characterized in that: The laminated pole core is a rectangular parallelepiped pole core, and the laminated pole core forms cutting areas at four corners of its large surface, and the cutting areas have cutting edges; The setting position for cutting the peripheral side of the laminated core includes: The laminated pole core is cut from the cutting edge along the pole piece stacking direction.

4. The recycling method according to claim 1, characterized in that: Before the pole ear is moved to the preset position, the pole piece near the corresponding pole ear is subjected to shaping treatment, and the shaping treatment includes: The laminated pole core is subjected to a rolling operation.

5. The recycling method according to claim 1, characterized in that: The direction in which the pole piece is pulled out from the laminated pole core is parallel to the plane where the pole piece is located.

6. The recycling method according to claim 1, characterized in that: The pole ears in the laminated pole core extend from both sides of the laminated pole core, and the pole piece is pulled out from the laminated pole core, comprising: The two pole pieces respectively connected to the two pole ears are simultaneously pulled out from both sides of the laminated pole core.

7. The recycling method according to claim 1, characterized in that: Before the tab is moved to a preset position, the method further includes: The pole ear welding part of the laminated pole core is cut.

8. The recycling method according to claim 1, characterized in that: The step of moving the tab to a preset position includes: The pole lug is moved in a direction along the pole sheet stacking direction of the laminated pole core to be away from the laminated pole core and / or the pole lug is moved in a plane direction of the laminated pole core to be away from the laminated pole core.

9. The recycling method according to claim 1, characterized in that: Clamping the pole ear and / or the pole piece and extracting the pole piece from the laminated pole core comprises: A gripping area for clamping the pole piece has a size that is less than one tenth of the length of the pole piece in the length direction of the pole piece.

10. A recovery device for laminated core, characterized in that: include: A cutting assembly, the cutting assembly is used to cut the set position of the peripheral side of the laminated pole core to separate the peripheral side of the pole piece in the laminated pole core from the peripheral side of the diaphragm; A suction assembly, the suction assembly is used to suck the pole ear and move the pole ear to a preset position so that the pole piece is at least partially exposed from the laminated pole core; A clamping assembly, the clamping assembly is used to clamp the pole lug and / or the pole piece, and extract the pole piece from the laminated pole core; Wherein, moving the tab to a preset position includes: Suctioning the pole lug and moving the pole lug in a direction away from the laminated pole core so that the pole lug is in a preset position; While clamping the pole lug located at the preset position and pulling out the pole piece connected to the pole lug from the laminated pole core, the method further includes: The laminated core is heated at a temperature ranging from 100°C to 140°C.

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