CN117438688A - Method and device for recycling laminated pole core - Google Patents
Method and device for recycling laminated pole core Download PDFInfo
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- CN117438688A CN117438688A CN202210822842.XA CN202210822842A CN117438688A CN 117438688 A CN117438688 A CN 117438688A CN 202210822842 A CN202210822842 A CN 202210822842A CN 117438688 A CN117438688 A CN 117438688A
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004064 recycling Methods 0.000 title claims description 22
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- 238000011084 recovery Methods 0.000 claims abstract description 79
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
Abstract
The embodiment of the application provides a recovery method and a recovery device for laminated pole cores, wherein the recovery method is used for recovering unqualified laminated pole cores. The recovery method of the laminated pole core comprises the following steps: forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm; cutting the outer membrane to expose the pole piece; and taking the pole piece out of the laminated pole core. The invention has the technical effects that the independent recovery efficiency of the pole pieces in the laminated pole cores can be ensured, the damage to the pole pieces in the process of taking out the pole pieces from the laminated pole cores is reduced, the recovery integrity of the pole pieces is ensured, and the recovery rate of the pole pieces is improved.
Description
Technical Field
The application belongs to the technical field of battery recovery, and particularly relates to a recovery method and a recovery device for laminated pole cores.
Background
The battery generally includes a positive electrode sheet and a negative electrode sheet formed of a current collector to which an active material such as lithium metal or lithium alloy is attached, a separator for separating the positive electrode sheet and the negative electrode sheet, and an electrolyte formed of a nonaqueous electrolyte solution. The chemical characteristics of lithium metal are very active, so that the processing, storage and use requirements of lithium metal are very high. The above-mentioned active substances, if not recovered but discarded to the environment, have a great influence on the environment.
The existing battery recovery adopts destructive recovery, such as mechanical crushing, high-temperature calcination and the like, but the recovery methods cannot classify and process different materials in the battery, and the pole pieces are easy to destroy in the recovery, so that the problems of low recovery utilization rate, serious environmental pollution and the like exist.
Disclosure of Invention
An object of the embodiments of the present application is to provide a new technical solution of a recovery method and a recovery device for laminated pole cores.
According to a first aspect of embodiments of the present application, there is provided a method for recovering a laminated core, for recovering a failed laminated core, including:
forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm;
cutting the outer membrane to expose the pole piece;
and taking the pole piece out of the laminated pole core.
Optionally, forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm, including:
and sucking an outer layer diaphragm of the laminated pole core so as to leave the avoiding gap between the outer layer diaphragm and the adjacent pole piece.
Optionally, after the pole piece is taken out from the laminated pole core, the method further comprises:
repeating the steps S101, S102 and S103 until all the pole pieces are taken out of the laminated pole core.
Optionally, the middle width of the avoiding gap is larger than the widths of the two sides, and the outer layer diaphragm is cut to expose the pole piece, including;
cutting the middle of the outer-layer diaphragm, and exposing the pole piece after the cut outer-layer diaphragm is turned outwards.
Optionally, the intermediate width of the avoidance gap ranges from 1mm to 2mm.
Optionally, when the outer membrane is connected to a membrane on a side of the pole piece remote from the outer membrane, the cutting the outer membrane to expose the pole piece includes;
the cut edge of the outer membrane is secured to expose the pole piece.
Optionally, securing the cut edge of the outer membrane includes:
the cut edge of the outer membrane is everted to a fixed position that is outside the removal path of the pole piece.
Optionally, when the outer membrane is separated from the membrane on the side of the pole piece away from the outer membrane, the cutting the outer membrane to expose the pole piece includes:
the outer membrane is removed from the pole piece to expose the pole piece.
Optionally, said removing said pole piece from said laminated pole core comprises;
and sucking the pole piece along a direction away from the laminated pole core.
Optionally, said removing said pole piece from said laminated pole core comprises;
and tearing off the pole piece along the edge of the pole piece in a direction away from the laminated pole core.
Optionally, before forming the avoiding gap between the outer layer diaphragm of the laminated pole core and the pole piece adjacent to the outer layer diaphragm, the method further comprises:
and cutting the welding part of the lug of the laminated pole core.
Optionally, the pole piece is taken out from the laminated pole core, and meanwhile, the method further comprises:
and heating the laminated pole core, wherein the temperature range of the heating operation is 100-140 ℃.
According to a second aspect of embodiments of the present application, there is provided a recovery device for laminated pole pieces, including:
the suction assembly is used for sucking the outer-layer membrane of the laminated pole core so as to form an avoidance gap between the outer-layer membrane of the laminated pole core and a pole piece adjacent to the outer-layer membrane;
a cutting assembly for cutting the outer membrane to expose the pole piece;
and the extraction assembly is used for extracting the pole piece from the laminated pole core.
Optionally, the recovery device further comprises a securing assembly for securing the cut edge of the outer membrane.
One technical effect of the present application is:
the recovery method of the laminated pole core provided by the embodiment of the application comprises the following steps: forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm; cutting the outer membrane to expose the pole piece; and taking the pole piece out of the laminated pole core. According to the recovery method, the independent recovery efficiency of the pole pieces in the laminated pole cores can be guaranteed, the damage to the pole pieces in the process of taking out the pole pieces from the laminated pole cores is reduced, the recovery integrity of the pole pieces is guaranteed, the recovery rate of the pole pieces is improved, and meanwhile pollution to the environment can be avoided.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a flowchart of a method for recovering laminated pole cores according to an embodiment of the present application;
fig. 2 is a schematic recycling diagram of a method for recycling laminated pole cores according to an embodiment of the present application;
fig. 3 is a schematic exploded view of a laminated pole core according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a recovery device for laminated pole cores according to an embodiment of the present application.
Wherein: 1. a suction assembly; 2. a cutting assembly; 3. taking out the assembly; 4. and fixing the assembly.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1, an embodiment of the present application provides a method for recycling a laminated core, where the recycling method is used for recycling a failed laminated core, and the failed laminated core may include a failed laminated core disassembled from a failed electric core, or may include a failed laminated core directly obtained in a production process. For example, the unqualified pole core caused by the problems of partial material dropping of the pole piece, uneven coating thickness of an active layer on the pole piece or partial breakdown of the pole piece in the production process of the battery core is solved. In the production and processing process of the battery cell, the quality of the electrode core and the whole battery cell which are filled in the battery cell is screened. The pole core and the pole piece can be identified as unqualified pole cores due to the defects of inconsistent size, partial material dropping and the like. The cells may be considered unacceptable due to problems such as housing seals. Such products can be eliminated from the production line. In practice, however, most of the pole pieces in the products can normally perform, and only part of the pole pieces are damaged and disqualified. In this regard, the application provides a method for recycling the unqualified products in production, which can effectively utilize the pole cores and pole pieces in the unqualified products in other products after eliminating the defects, and improve the productivity and the material utilization rate.
The recovery method comprises the following steps:
s101, forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm;
specifically, the laminated pole core comprises one or more groups of laminated pole pieces, wherein the pole pieces in the laminated pole core comprise positive pole pieces and negative pole pieces, and one group of laminated pole pieces can comprise a positive pole piece, a negative pole piece and a diaphragm for separating the positive pole piece and the negative pole piece, namely a layer of positive pole piece, a layer of diaphragm and a layer of negative pole piece are sequentially attached; and when the laminated pole core comprises a plurality of sets of laminations, the plurality of sets of laminations are stacked and can be separated by a diaphragm.
According to the recovery method provided by the embodiment of the application, the outer layer membrane of the laminated pole core and the pole piece adjacent to the outer layer membrane form an avoidance gap, for example, the outer layer membrane is sucked or clamped, and then the outer layer membrane and the pole piece adjacent to the outer layer membrane form an avoidance gap, namely, the outer layer membrane of the laminated pole core has the avoidance gap relative to the pole piece adjacent to the outer layer membrane. The setting of this dodge clearance can be convenient for follow-up cutting diaphragm in order to take out inside pole piece, has provided the great working space of follow-up other technology, has also protected the pole piece simultaneously, has avoided the damage of diaphragm cutting technology to the pole piece, has guaranteed the rate of recovery of pole piece in the lamination pole piece.
In addition, in the process of reserving an avoidance gap between the outer-layer diaphragm and the adjacent pole piece, the position of the laminated pole core can be limited by utilizing a limiting mechanism, and the phenomenon that the technology drives the laminated pole core to move so as to influence the formation of the avoidance gap is avoided.
S102, cutting the outer-layer diaphragm to expose the pole piece;
specifically, after a clearance is reserved between the outer-layer diaphragm and the adjacent pole piece, the arched diaphragm can be cut by utilizing a film cutting mechanism so as to expose the pole piece in the inner part. As shown in fig. 2, the middle portion of the arched diaphragm may be cut by a cutting assembly such as a hot-melt knife, so that the diaphragm can be naturally scattered from both sides to expose the inner pole pieces after being cut. According to the embodiment of the application, the diaphragm at the two sides can be conveniently and naturally dispersed under the action of gravity through cutting the arched middle part of the diaphragm, so that the pole piece inside the diaphragm can be largely exposed, the subsequent recovery of the pole piece is facilitated, and the recovery efficiency of the pole piece in the laminated pole core is improved.
In another embodiment, according to the actual arrangement requirement, other parts of the membrane arch can be cut by using a membrane cutting mechanism such as a hot melt knife, so that the membrane can be scattered after being cut to expose the internal pole pieces.
S103, taking the pole piece out of the laminated pole core.
Specifically, after the diaphragm is cut to expose the pole piece, the pole piece can be sucked by using the sucking disc or removed to take out the complete pole piece from the laminated pole core, so that the pole piece taking-out process is easy and convenient, the laminated pole core can be gradually split, and the recovery efficiency of the pole piece in the laminated pole core is improved. And the damage degree to the pole piece is low when the pole piece is taken out from the laminated pole core, so that the recovery integrity of the pole piece is ensured, and the recovery rate of the pole piece is improved. In addition, the recovery rate of the pole pieces is improved, and the number of unqualified laminated pole pieces generated in the laminated pole piece production process is reduced, so that the rejection rate of the pole pieces can be reduced, and the adverse effect of the scrapped pole pieces on the environment is reduced.
The recovery method of the laminated pole core provided by the embodiment of the application comprises the following steps: forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm; cutting the outer membrane to expose the pole piece; and taking the pole piece out of the laminated pole core. According to the recovery method, the independent recovery efficiency of the pole pieces in the laminated pole cores can be guaranteed, the damage to the pole pieces in the process of taking out the pole pieces from the laminated pole cores is reduced, the recovery integrity of the pole pieces is guaranteed, the recovery rate of the pole pieces is improved, and meanwhile, the pollution to the environment caused by scrapped pole pieces can be avoided.
Optionally, forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm, including:
and sucking an outer layer diaphragm of the laminated pole core so as to leave the avoiding gap between the outer layer diaphragm and the adjacent pole piece.
According to the embodiment, the outer-layer membrane of the laminated pole core can be sucked, for example, suction mechanisms such as a sucker can be used for sucking the outer-layer membrane of the laminated pole core, so that the outer-layer membrane of the laminated pole core can be adsorbed to arch, and a clearance is reserved between the outer-layer membrane of the laminated pole core and an adjacent pole piece.
When the outer membrane of the laminated pole core is sucked by the sucker, the sucker can be arranged above the middle of the outer membrane, so that the sucker can suck the middle of the outer membrane, and then a clearance is formed easily, the technological difficulty of sucking the membrane to form the clearance is reduced, and the recovery efficiency of the pole pieces in the laminated pole core can be improved.
In addition, the outer membrane of the laminated pole core is sucked by utilizing sucking mechanisms such as a sucker, so that a gap is reserved between the outer membrane and an adjacent pole piece, the position of the laminated pole core can be limited by utilizing a limiting mechanism, the suction process is prevented from driving the laminated pole core to move so as to influence the suction of the outer membrane of the laminated pole core, the suction leakage is avoided, the suction reliability of the outer membrane of the laminated pole core is improved, the suction difficulty of the outer membrane of the laminated pole core is reduced, and the recovery efficiency of the pole pieces in the laminated pole core is improved.
Optionally, after the pole piece is taken out from the laminated pole core, the method further comprises:
repeating the steps S101, S102 and S103 until all the pole pieces are taken out of the laminated pole core.
Specifically, repeating the steps S101, S102, and S103 may be:
the pole piece is taken out of the laminated pole core and then an inner-layer diaphragm is exposed;
taking the inner layer diaphragm as the outer layer diaphragm, and forming an avoidance gap between the outer layer diaphragm and a pole piece adjacent to the outer layer diaphragm;
cutting the outer membrane to expose the pole piece;
and taking the pole piece out of the laminated pole core.
In this embodiment, after the steps S101 to S103 are completed to remove the pole pieces, the steps S101 to S103 are repeated until the pole pieces are all removed from the laminated pole core. Specifically, after the above steps S101 to S103 are completed to take out the pole piece, the laminated pole piece is exposed to the inner layer separator, and the inner layer separator is regarded as the outer layer separator in step S101 and the above recovery method is repeated as well: forming an avoidance gap between an inner-layer diaphragm of the laminated pole core and a pole piece adjacent to the inner-layer diaphragm; cutting the exposed outer membrane to expose the pole piece; and taking out the pole pieces from the laminated pole cores, so that the pole pieces can be continuously taken out, the pole pieces in the laminated pole cores can be continuously recovered, and the complete separation of all the pole pieces and the diaphragm can be achieved.
After the recovery method of the embodiment is completed to take out the pole pieces, the recovery method can be continuously repeated so as to be capable of connecting and taking out the pole pieces from the laminated pole cores, further realizing continuous recovery of the pole pieces in the laminated pole cores and improving recovery efficiency of the pole pieces in the laminated pole cores.
Optionally, the middle width H of the avoiding gap is greater than the two side widths H, and the outer layer diaphragm is cut to expose the pole piece, including;
cutting the middle of the outer-layer diaphragm, and exposing the pole piece after the cut outer-layer diaphragm is turned outwards.
Specifically, the middle width H of the avoidance gap reserved between the outer layer diaphragm and the adjacent pole piece is larger than the two side widths H, namely the distance between the middle part of the outer layer diaphragm and the adjacent pole piece is larger than the distance between the edge of the outer layer diaphragm and the adjacent pole piece, so that the outer layer diaphragm can be adsorbed to arch. The width of the avoidance gap is the distance between the outer-layer diaphragm and the pole piece, the middle width of the avoidance gap is the distance between the middle outer-layer diaphragm and the pole piece, and the width of the avoidance gap is the distance between the outer-layer diaphragm and the pole piece.
As shown in fig. 2, the center height of the relief gap is higher than the two side heights as viewed in the cross section of the laminated pole core, so that the outer membrane can be adsorbed to arch. The setting of this embodiment can be convenient for cut the subassembly and to the cutting of the arched portion of outer diaphragm, provides the certain technological space of cutting the subassembly, and the outer diaphragm of also being convenient for can follow the both sides after being cut naturally to scatter in order to expose inside pole piece, reduces the work degree of difficulty of other technologies of follow-up, and then improves the recovery efficiency of pole piece in the lamination utmost point core.
The middle of the outer layer diaphragm is cut, namely, the camber of the outer layer diaphragm is cut, so that the cut outer layer diaphragm is turned outwards and the pole piece is exposed, and the pole piece is conveniently recovered. According to the embodiment, the middle of the outer layer diaphragm is cut, a larger avoiding gap is reserved between the outer layer diaphragm at the cutting position and the adjacent pole piece, the larger avoiding gap can facilitate the realization of a cutting process, and enough arrangement space and working space of different cutting assemblies are provided. Meanwhile, a larger avoiding gap is formed between the outer-layer diaphragm at the cutting position and the adjacent pole piece, the inner pole piece can be protected in the cutting process, the damage of the outer-layer diaphragm cutting process to the pole piece is avoided, the recovery precision of the pole piece in the laminated pole core is ensured, and the recovery rate of the pole piece is further improved.
The cutting assembly may be a hot melt knife (such as an "in-line" type hot melt knife) or other hot knife, and may cut along the middle of the outer membrane to expose the pole piece. In the cutting process, the heating temperature of the hot-melt knife, the cutting depth of the hot-melt knife and the like are required to be controlled in proper ranges, so that the pole piece is prevented from being damaged by the hot-melt knife while the high-efficiency fusing of the outer-layer diaphragm is realized, the risk of breaking the pole piece in the subsequent recovery process is avoided, the influence of the cutting process on the laminated pole core is reduced, and the recovery rate of the pole piece is improved.
The cut outer layer membrane is turned outwards to expose the pole pieces, and the two sides of the air blowing mechanism can be used for continuously blowing air, so that the cut outer layer membrane is turned outwards from the two sides to be scattered, and the pole pieces in the inner part are exposed; suction mechanisms such as suckers are correspondingly arranged on two sides of the outer-layer diaphragms, the suckers are used for respectively sucking the cut outer-layer diaphragms from the two sides so that the outer-layer diaphragms on the two sides can be turned outwards, and the pole pieces in the outer-layer diaphragms can be exposed.
Optionally, the intermediate width H of the avoidance gap ranges from 1mm to 2mm.
Specifically, the range of the middle width H of the avoidance gap can be set to be 1mm-2mm, namely, the distance between the middle outer membrane and the pole piece is 1mm-2mm, so that the outer membrane can be adsorbed to arch to a sufficient height, the cutting assembly can conveniently cut the outer membrane, meanwhile, the inner pole piece can be protected in the cutting process by utilizing the height, the damage of the outer membrane cutting process to the pole piece is avoided, the recovery precision of the pole piece in the laminated pole core is ensured, and the recovery rate of the pole piece is further improved. In addition, the increase of the difficulty of the adsorption process caused by the overlarge middle width of the avoidance gap is avoided, the damage of the diaphragm caused by excessive adsorption is avoided, and the influence on the subsequent recovery process is avoided.
Optionally, when the outer membrane is connected to a membrane on a side of the pole piece remote from the outer membrane, the cutting the outer membrane to expose the pole piece includes;
the cut edge of the outer membrane is secured to expose the pole piece.
Specifically, the outer membrane can be connected with a membrane on one side of the pole piece, which is far away from the outer membrane, so as to fix the laminated pole core. When the outer membrane of the laminated pole core is cut to expose the internal pole piece, a membrane pressing mechanism can be arranged at the edge of the cut outer membrane, for example, as shown in fig. 2, membrane pressing mechanisms are respectively arranged at two sides of the laminated pole core, the outer membrane which is unfolded after cutting is restrained by the membrane pressing mechanisms, the damage to the pole piece caused by the influence of the outer membrane which is unfolded after cutting on the subsequent pole piece taking-out process is avoided, the subsequent recovery of the pole piece is facilitated, and the recovery rate of the pole piece is improved.
The film pressing mechanism can be an adhesive mechanism, the edge of the cut outer layer diaphragm is provided with the adhesive mechanism, the cut outer layer diaphragm can be adhered to be fixed in position, the outer layer diaphragm which is unfolded after cutting is prevented from shaking to influence the follow-up pole piece taking out, meanwhile, the pole piece taking out difficulty is reduced, and the recovery efficiency of the pole piece in the laminated pole core is improved.
Optionally, securing the cut edge of the outer membrane includes:
the cut edge of the outer membrane is everted to a fixed position that is outside the removal path of the pole piece.
Specifically, in the preparation process of the laminated pole core, the width of the diaphragm is larger than that of the negative pole piece, and meanwhile, the width of the diaphragm is larger than that of the positive pole piece, so that the diaphragm can completely cover the pole piece after the pole pieces are stacked. And in the process of forming the pole core, the upper and lower layers of diaphragms are connected together to ensure the reliability of the whole pole core. The laminated pole pieces in the examples described below are therefore illustrated as examples. The pole cores have the problem that the diaphragm is not processed but obstructs the pole piece taking-out path, so that the diaphragm of the pole cores needs to be fixed outside the corresponding pole piece taking-out path so as to ensure that the diaphragm does not influence the pole piece taking-out path.
Specifically, when the plurality of 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, namely the surface in the length-width dimension direction of the laminated pole core. If the edge of the pole piece is uncovered in the direction away from the laminated pole core, the fixed position is arranged outside the projection of the laminated pole core in the large-surface direction, so that the cutting edge of the outer layer diaphragm can be outwards turned for a certain distance and then fixed, the laminated pole core is avoided, and the influence of the fixation of the cutting edge on the laminated pole core is avoided. If the pole piece is taken out from the laminated pole core along the direction parallel to the large surface of the pole core, the fixed position can be the position corresponding to the large surface of the pole piece, so that the pole piece can be taken out from the pole lug side.
According to the embodiment, after the cutting edge of the outer diaphragm is turned outwards to the fixed position, the cutting edge of the outer diaphragm can be fixed, for example, a film pressing mechanism can be arranged on the cutting edge, the outer diaphragm located at the fixed position is restrained by the film pressing mechanism, the damage to the pole piece caused by the influence of the outer diaphragm unfolded after cutting on the follow-up pole piece taking-out process is avoided, the follow-up recovery of the pole piece is facilitated, and the recovery rate of the pole piece is improved.
Optionally, when the outer membrane is separated from the membrane on the side of the pole piece away from the outer membrane, the cutting the outer membrane to expose the pole piece includes:
the outer membrane is removed from the pole piece to expose the pole piece.
In this embodiment, the outer membrane may be separated from the membrane on the pole piece on the side far away from the outer membrane, and in this case, since there is no connection problem between the upper membrane and the lower membrane, when the outer membrane is cut to expose the pole piece, the outer membrane may be directly removed from the pole piece, so as to facilitate the removal of the pole piece. The outer membrane is removed from the pole piece, and the outer membrane can be blown off by utilizing the continuous blowing of two sides of the blowing mechanism, or suction mechanisms such as suction cups and the like can be correspondingly arranged on two sides of the outer membrane to suck the outer membrane.
In addition, the outer side of the outer layer diaphragm of the laminated pole core can be further wrapped with an insulating film, the laminated pole core can be protected by the insulating film, and stability of the laminated pole core is further guaranteed. The above recovery method may also be used for removing the insulating film, and will not be described here.
Optionally, said removing said pole piece from said laminated pole core comprises;
and sucking the pole piece along a direction away from the laminated pole core.
Specifically, the exposed negative electrode plate can be sucked by utilizing a sucking mechanism such as a sucking disc, so that the negative electrode plate can be sucked in a direction away from the laminated electrode core, and further, a group of negative electrode plates of the laminated electrode core can be recovered. And then, repeating the steps S101 and S102 so as to expose the positive plate, and sucking the exposed positive plate by using a sucking mechanism such as a sucking disc so as to suck the positive plate along the direction away from the laminated pole core, thereby completing the recovery of a group of positive plates of the laminated pole core.
According to the embodiment, the pole piece can be directly sucked out along the direction away from the laminated pole core by utilizing sucking mechanisms such as the sucking disc, and the sucking mode improves the convenience of pole piece extraction. In addition, the pole piece can be taken out conveniently, the other internal structures can be protected by controlling factors such as adsorption force or adsorption distance, the influence of excessive taking out for a single time on the remaining structures is avoided, and the recovery rate of the pole piece is improved.
In addition, the pole piece is taken out in a suction mode, so that the damage degree of the pole piece to the pole piece when the pole piece is taken out from the laminated pole core can be reduced, the recovery integrity of the pole piece is ensured, and the recovery rate of the pole piece is improved.
Optionally, said removing said pole piece from said laminated pole core comprises;
and tearing off the pole piece along the edge of the pole piece in a direction away from the laminated pole core.
Specifically, for the pole piece exposed after the cutting process, the pole piece can be directly torn off along the edge of the pole piece in the direction away from the laminated pole core, so as to realize the taking-out of the pole piece. According to the embodiment, the pole piece is directly torn off along the edge of the pole piece, so that the convenience in taking out the pole piece can be improved, the recovery efficiency of the pole piece is improved, and meanwhile, the cost of a recovery device needed in the recovery process of the laminated pole core is saved.
Optionally, before forming the avoiding gap between the outer layer diaphragm of the laminated pole core and the pole piece adjacent to the outer layer diaphragm, the method further comprises:
and cutting the welding part of the lug of the laminated pole core.
Specifically, when the laminated pole core includes a plurality of groups of laminated pole cores, a plurality of positive lugs on a plurality of positive plates in the laminated pole core can be bonded with each other and then welded together, for example, one sides of the positive lugs, which are far away from the positive plates, are welded together, so that barriers are caused to separation among the plurality of positive plates. And the recovery method provided by the embodiment of the application cuts the welding parts of the lugs of the laminated pole cores, namely, the welding marks among the lugs can be cut by the cutter, so that the lugs are in a loose state, the follow-up pole piece separation is convenient, and the separation efficiency among the positive pole pieces is ensured.
And when the laminated pole core, which is not welded with the pole lugs after lamination, is recovered, the pole lug welding part of the laminated pole core can be omitted from being cut.
In addition, as shown in fig. 3, the method may further include removing a film and shaping the tab before cutting the tab welding portion of the laminated tab, where the removing of the film may be removing a plastic film with the surface of the laminated tab as a protective film by a film cutting mechanism, and the shaping of the tab may be rolling a plurality of tabs attached together, so that the plurality of tabs are dispersed, and the sucking and clamping of the tabs are facilitated. The plastic film is removed by removing the film and shaping the pole lugs, so that only the outer-layer diaphragm and the pole piece are left on the laminated pole core, the pole piece is convenient to recycle, and the recovery rate of the pole piece is also improved.
Optionally, the pole piece is taken out from the laminated pole core, and meanwhile, the method further comprises:
and heating the laminated pole core, wherein the temperature range of the heating operation is 100-140 ℃.
Specifically, during the preparation of the laminated pole core, since the positive pole piece and the negative pole piece can generate binding force with the diaphragm when being attached to the diaphragm, especially during the formation of the laminated pole core, local positions on the peripheral side of the pole pieces in the laminated pole core and local positions on the peripheral side of the diaphragm can be mutually connected. In order to avoid the influence of the connection between the diaphragm and the pole piece on the pole piece extraction, the laminated pole piece core can be subjected to heating operation, and the diaphragm is softened by high temperature of 100-140 ℃ so as to separate the diaphragm and the pole piece. For example, a hot air blowing device is added to the adhesion part between the diaphragm and the pole piece, and the diaphragm can be softened when the air outlet temperature of the hot air blowing device is 120 ℃.
Referring to fig. 4, an embodiment of the present application provides a recovery device of a laminated pole core, the recovery device including:
the suction assembly 1 is used for sucking the outer-layer membrane of the laminated pole core, so that an avoidance gap is formed between the outer-layer membrane of the laminated pole core and a pole piece adjacent to the outer-layer membrane;
a cutting assembly 2, wherein the cutting assembly 2 is used for cutting the outer-layer diaphragm to expose the pole piece;
and the extraction assembly 3 is used for extracting the pole piece from the laminated pole core.
Specifically, in the recovery device for the laminated pole core provided by the embodiment of the application, the outer layer membrane of the laminated pole core is sucked by the suction assembly 1, so that an avoidance gap is formed between the outer layer membrane of the laminated pole core and the pole piece adjacent to the outer layer membrane; the cutting assembly 2 may cut the outer membrane to expose the pole piece; the extraction assembly 3 may extract the pole pieces from the laminated pole cores. The recovery device can ensure the independent recovery efficiency of the pole pieces in the laminated pole cores, reduce the damage to the pole pieces in the process of taking out the pole pieces from the laminated pole cores, ensure the recovery integrity of the pole pieces, and further improve the recovery rate of the pole pieces.
Optionally, the recovery device further comprises a fixing component 4, wherein the fixing component 4 is used for fixing the cutting edge of the outer layer membrane.
Specifically, after the outer separator of the laminated pole core is cut to expose the inner pole piece, a fixing member 4 may be provided at the edge of the cut outer separator, and the fixing member 4 may fix the cut edge of the outer separator. For example, fixing assemblies 4 are respectively arranged on two sides of the laminated pole core, the outer membrane which is unfolded after cutting is restrained by the fixing assemblies 4, the damage to the pole piece caused by the influence of the outer membrane which is unfolded after cutting on the subsequent pole piece taking-out process is avoided, and the recovery rate of the pole piece can be improved.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (14)
1. A method of recycling laminated cores for recycling rejected laminated cores, comprising:
s101: forming an avoidance gap between an outer layer diaphragm of the laminated pole core and a pole piece adjacent to the outer layer diaphragm;
s102: cutting the outer membrane to expose the pole piece;
s103: and taking the pole piece out of the laminated pole core.
2. The recycling method according to claim 1, wherein forming a relief gap between an outer layer diaphragm of the laminated pole piece and a pole piece adjacent to the outer layer diaphragm, comprises:
and sucking an outer layer diaphragm of the laminated pole core so as to leave the avoiding gap between the outer layer diaphragm and the adjacent pole piece.
3. The recycling method according to claim 1, further comprising, after the pole piece is taken out of the laminated pole core:
repeating the steps S101, S102 and S103 until all the pole pieces are taken out of the laminated pole core.
4. The recycling method according to claim 1, wherein the middle width of the avoiding gap is larger than the two side widths, the outer layer membrane is cut to expose the pole piece, comprising;
cutting the middle of the outer-layer diaphragm, and exposing the pole piece after the cut outer-layer diaphragm is turned outwards.
5. The recovery method of claim 4, wherein the relief gap has a median width in the range of 1mm to 2mm.
6. The recycling method according to claim 1, wherein said cutting said outer membrane to expose said pole piece includes, when said outer membrane is connected to a membrane on a side of said pole piece remote from said outer membrane;
the cut edge of the outer membrane is secured to expose the pole piece.
7. The method of recycling according to claim 6, wherein fixing the cut edge of the outer layer membrane comprises:
the cut edge of the outer membrane is everted to a fixed position that is outside the removal path of the pole piece.
8. The recycling method according to claim 1, wherein when the outer membrane is separated from a membrane on a side of the pole piece remote from the outer membrane, the cutting the outer membrane to expose the pole piece includes:
the outer membrane is removed from the pole piece to expose the pole piece.
9. The recycling method according to claim 1, wherein said removing said pole piece from said laminated pole core comprises;
and sucking the pole piece along a direction away from the laminated pole core.
10. The recycling method according to claim 1, wherein said removing said pole piece from said laminated pole core comprises;
and tearing off the pole piece along the edge of the pole piece in a direction away from the laminated pole core.
11. The recycling method according to claim 1, further comprising, before forming a back-off gap between an outer layer diaphragm of the laminated pole piece and a pole piece adjacent to the outer layer diaphragm:
and cutting the welding part of the lug of the laminated pole core.
12. The recycling method according to claim 1, characterized in that, while taking out the pole piece from the laminated pole core, it further comprises:
and heating the laminated pole core, wherein the temperature range of the heating operation is 100-140 ℃.
13. A recycling device for laminated pole cores, comprising:
the suction assembly (1) is used for sucking the outer-layer membrane of the laminated pole core so as to form an avoidance gap between the outer-layer membrane of the laminated pole core and a pole piece adjacent to the outer-layer membrane;
-a cutting assembly (2), the cutting assembly (2) being adapted to cut the outer membrane to expose the pole piece;
-a take-out assembly (3), the take-out assembly (3) being adapted to take out the pole pieces from the laminated pole core.
14. The recycling apparatus according to claim 13, further comprising a securing assembly (4), said securing assembly (4) being adapted to secure a cut edge of said outer membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822842.XA CN117438688A (en) | 2022-07-12 | 2022-07-12 | Method and device for recycling laminated pole core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822842.XA CN117438688A (en) | 2022-07-12 | 2022-07-12 | Method and device for recycling laminated pole core |
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| Publication Number | Publication Date |
|---|---|
| CN117438688A true CN117438688A (en) | 2024-01-23 |
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| CN202210822842.XA Pending CN117438688A (en) | 2022-07-12 | 2022-07-12 | Method and device for recycling laminated pole core |
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| Country | Link |
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| CN (1) | CN117438688A (en) |
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- 2022-07-12 CN CN202210822842.XA patent/CN117438688A/en active Pending
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