CN112310487A - Lamination method - Google Patents
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- CN112310487A CN112310487A CN201910703921.7A CN201910703921A CN112310487A CN 112310487 A CN112310487 A CN 112310487A CN 201910703921 A CN201910703921 A CN 201910703921A CN 112310487 A CN112310487 A CN 112310487A
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a lamination method, which comprises the following steps that a plurality of pole piece groups are attached to a diaphragm in sequence, and the diaphragm separates the pole piece groups; a plurality of pole piece groups are overlapped alternately, so that two adjacent pole piece groups are separated by a diaphragm. This application can accomplish the lamination fast through the cooperation position of rational distribution utmost point piece group on the diaphragm after the coincide in turn, has promoted the efficiency of electric core lamination, and then has promoted the efficiency of electric core production.
Description
Technical Field
The invention relates to the technical field of battery cell production, in particular to a lamination method.
Background
The new energy is an industry which is greatly supported by the state at present, and has important significance for high-efficiency production of lithium ion batteries which are important components of the new energy. The battery core lamination is the core for preparing the battery core, in the prior art, the battery core lamination mostly passes through a diaphragm Z-shaped lamination, wherein a pole piece is placed on a barrier film, and another lamination is placed after the pole piece is bent by 180 degrees, or a simple stacking type is adopted, namely, a positive pole piece, a negative pole piece and the barrier film are respectively cut into preset sizes, and then the positive pole piece, the negative pole piece and the barrier film which are cut according to the sequence of the negative pole piece, the barrier film, the positive pole piece, the barrier film and the negative pole piece are stacked, so that the battery core lamination is obtained. The lamination speed is slow in the two modes, the efficiency is low, and the production efficiency of the lithium ion battery is further influenced.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides a lamination method.
A lamination method comprising:
the plurality of pole piece groups are attached to the diaphragm in sequence, and the diaphragm separates the pole piece groups;
a plurality of pole piece groups are overlapped alternately, so that two adjacent pole piece groups are separated by a diaphragm.
According to one embodiment of the present invention, the electrode sheet set includes a first electrode sheet and a second electrode sheet, and the separator includes a first separator and a second separator; a plurality of pole piece groups are arranged in sequence on the diaphragm, and the diaphragm divides the pole piece groups, and comprises:
the first diaphragm and the second diaphragm are respectively attached to two surfaces of the first pole pieces;
the second pole pieces are respectively attached to the first diaphragm and one side, back to the first pole piece, of the second diaphragm at intervals, and the second pole piece attached to the first diaphragm is adjacent to the second pole piece attached to the second diaphragm.
According to an embodiment of the present invention, the attaching of the first diaphragm and the second diaphragm to the two sides of the first pole pieces respectively includes:
the plurality of first pole pieces are attached to the first diaphragm;
the second diaphragm is overlapped on the first diaphragm and covers the plurality of first pole pieces.
According to an embodiment of the present invention, the plurality of second pole pieces are attached to the first diaphragm and a surface of the second diaphragm facing away from the first pole piece at intervals, respectively, and the method includes:
a plurality of second pole pieces are attached to the first diaphragm and are opposite to the odd-number first pole pieces; the plurality of second pole pieces are attached to the second diaphragm and are opposite to the even-numbered first pole pieces; or
The plurality of second pole pieces are attached to the first diaphragm and are opposite to the even-numbered first pole pieces; the second pole pieces are transferred and attached to the second diaphragm and are opposite to the odd-numbered first pole pieces.
According to an embodiment of the present invention, alternately stacking a plurality of pole piece groups such that adjacent two pole piece groups are separated by a separator includes:
the diaphragm forms a plurality of imprints, and the imprints are arranged between two adjacent pole piece groups;
and applying the acting force in the same direction to the stamping at intervals, so that the plurality of pole piece groups are overlapped alternately.
According to an embodiment of the present invention, before alternately stacking a plurality of pole piece groups so that each of two adjacent pole piece groups is separated by a separator, the method further includes:
the pole piece set is thermally compounded with the diaphragm.
According to an embodiment of the present invention, after the first diaphragm and the second diaphragm are respectively attached to two sides of the plurality of first pole pieces, the method further includes:
a plurality of pole piece bags are prepared by the second diaphragm and the first diaphragm, so that the first pole pieces are respectively positioned in the pole piece bags.
According to one embodiment of the present invention, a plurality of pole piece sets are sequentially attached to a separator, including:
feeding a diaphragm;
feeding the pole piece group;
the plurality of pole piece groups are sequentially transferred to and separated by the separator.
According to an embodiment of the invention, a membrane loading comprises:
discharging through a diaphragm;
tensioning the diaphragm;
the diaphragm is subjected to electrostatic charging.
According to an embodiment of the present invention, the pole piece group feeding includes:
discharging the pole piece;
tensioning the pole piece;
and die cutting the pole piece.
According to an embodiment of the present invention, before die cutting, the method further comprises:
and (5) rectifying the deviation of the pole piece.
Compared with the prior art, the lamination method has the advantages that the lamination can be rapidly completed after alternate lamination through the matching positions of the pole piece groups on the diaphragm in reasonable distribution, the efficiency of lamination of the battery cell is improved, and the efficiency of battery cell production is further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of a lamination method according to one embodiment;
FIG. 2 is a schematic structural diagram of a pole piece and a diaphragm according to an embodiment;
FIG. 3 is a schematic view showing the structure of a laminating apparatus according to a second embodiment;
fig. 4 is a second schematic structural diagram of the lamination apparatus according to the second embodiment.
Description of reference numerals:
1. a first diaphragm feed mechanism; 11. a membrane discharging assembly; 12. a diaphragm tensioning assembly; 13. a static electricity adding component; 14. a turning roll; 2. a first diaphragm transfer mechanism; 3. a first pole piece feeding mechanism; 31. a pole piece discharging assembly; 32. a pole piece cache assembly; 321. manually connecting the belt position; 33. a pole piece tensioning assembly; 34. a pole piece deviation rectifying assembly; 35. a pole piece die cutting assembly; 351. rolling; 4. a first pole piece grabbing mechanism; 41. a transfer drive assembly; 42. transferring the grabbing component; 5. a second diaphragm transfer mechanism; 6. a diaphragm superposing mechanism; 7. a second pole piece feeding mechanism; 8. a second pole piece grabbing mechanism; 9. a hot-pressing compound mechanism; 10. a lamination mechanism; 101. a first lamination assembly; 102. a second lamination assembly; 103. a lamination table; 20. a bag making mechanism; 30. a stamping mechanism; 40. a cold press.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are used for descriptive purposes only, not specifically for describing order or sequence, but also for limiting the present invention, and are only used for distinguishing components or operations described in the same technical terms, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
For a further understanding of the contents, features and effects of the present invention, the following examples are illustrated in the accompanying drawings and described in the following detailed description:
example one
Referring to fig. 1 and 2, fig. 1 is a flow chart of a lamination method in the first embodiment, and fig. 2 is a structural schematic diagram of a pole piece and a diaphragm in the first embodiment. The lamination method in the embodiment comprises the following steps:
the plurality of pole piece groups are attached to the diaphragm in sequence, and the diaphragm separates the pole piece groups;
a plurality of pole piece groups are overlapped alternately, so that two adjacent pole piece groups are separated by a diaphragm.
Through the cooperation position of reasonable distribution utmost point piece group on the diaphragm, can accomplish the lamination fast after the coincide in turn, promoted the efficiency of electric core lamination, and then promoted the efficiency of electric core production.
It can be understood that the purpose of lamination is to make a cell in the following, and the cell is formed by sequentially laminating a plurality of groups of positive plates, diaphragms and negative plates and then filling electrolyte, wherein the diaphragms play an insulating role. The pole piece group in this embodiment includes a first pole piece and a second pole piece, and the diaphragm includes a first diaphragm and a second diaphragm, where the first pole piece may be a positive pole piece or a negative pole piece, and the second pole piece may also be a positive pole piece or a negative pole piece; when the first pole piece is a positive pole piece, the second pole piece is a negative pole piece; when the first pole piece is the negative pole piece, the second pole piece is the positive pole piece, and concrete setting can be carried out according to the electric core that actual production required package positive pole or package negative pole, and this place does not do the restriction. The first separator and the second separator are both separators between the insulating positive electrode sheet and the insulating negative electrode sheet, both of which are thin films, and both of which have a first surface and a second surface. In the present embodiment, as shown in fig. 2, the downward facing surfaces of the first and second separators are defined as first surfaces, and the upward facing surfaces of the first and second separators are defined as second surfaces. The first pole piece and the second pole piece which are overlapped up and down, or the second pole piece and the first pole piece which are overlapped up and down are a pole piece group, the diaphragm separates the pole piece group, the first pole piece and the second pole piece are separated, two adjacent pole piece groups are separated by the diaphragm, and the first pole piece and the second pole piece are also separated by the diaphragm.
Further, a plurality of pole piece groups are sequentially arranged on the diaphragm, and the diaphragm is used for separating the pole piece groups and comprises the following sub-steps:
the first diaphragm and the second diaphragm are respectively attached to two surfaces of the first pole pieces;
the second pole pieces are respectively attached to the first diaphragm and one side, back to the first pole piece, of the second diaphragm at intervals, and form a plurality of pole piece groups with the first pole pieces respectively; the second pole piece attached to the first diaphragm is adjacent to the second pole piece attached to the second diaphragm.
In this way, the first pole piece is completely wrapped and completely separated from the second pole piece through the combined action of the first diaphragm and the second diaphragm; and then the second pole pieces are distributed on the surfaces, back to the first pole piece, of the first diaphragm and the second diaphragm at intervals, and the second pole piece attached to the first diaphragm is adjacent to the second pole piece attached to the second diaphragm, so that a diaphragm, the first pole piece, the diaphragm and the second pole piece stacked structure can be formed after subsequent alternate stacking, the stacking of the battery cell is completed, the speed is high, and the stacking is accurate.
Further, the first diaphragm and the second diaphragm are respectively attached to two sides of the plurality of first pole pieces, and the method comprises the following substeps:
the plurality of first pole pieces are attached to the first surface of the first diaphragm;
the second surface of the second diaphragm is overlapped on the first surface of the first diaphragm and covers the plurality of first pole pieces.
The first diaphragm is firstly paved, then a plurality of first pole pieces are transferred in batches and paved on the first diaphragm along the length direction of the first diaphragm, and the second diaphragm is correspondingly overlapped on the first diaphragm, so that the plurality of first pole pieces are covered. This kind of mode can carry out the parcel operation of wholesale to a plurality of first pole pieces, and is efficient.
Furthermore, the plurality of second pole pieces are respectively attached to the first diaphragm and one surface of the second diaphragm, which faces away from the first pole piece, at intervals, so as to achieve the corresponding relationship of the following pole piece groups: the plurality of second pole pieces are respectively attached to the second surface of the first diaphragm and the first surface of the second diaphragm, the second pole piece attached to the second surface of the first diaphragm is adjacent to the second pole piece attached to the first surface of the second diaphragm, the plurality of first pole pieces are opposite to the plurality of second pole pieces one by one, and the first pole pieces and the second pole pieces which are opposite to each other one by one form a pole piece group. Thus, a corresponding relation is formed for subsequent alternate lamination, and the subsequent lamination is convenient to carry out. Specifically, the step of attaching the second pole pieces to the first diaphragm and the side, opposite to the first pole piece, of the second diaphragm at intervals comprises the following substeps:
a plurality of second pole pieces are attached to the first diaphragm and are opposite to the odd-number first pole pieces; the plurality of second pole pieces are attached to the second diaphragm and are opposite to the even-numbered first pole pieces; or a plurality of second pole pieces are attached to the first diaphragm and are opposite to the even-numbered first pole pieces; the second pole pieces are transferred and attached to the second diaphragm and are opposite to the odd-numbered first pole pieces.
So, through the cooperation position of first pole piece of rational distribution and second pole piece at first diaphragm and second diaphragm, through the coincide in turn to first pole piece and second pole piece, can accomplish the lamination fast, promoted the efficiency of electric core lamination, and then promoted the efficiency of electric core production. And the automatic fitting process and the search of odd target positions or even target positions are facilitated.
Further, the attaching of the plurality of first pole pieces to the first surface of the first diaphragm includes the following substeps:
and feeding the first diaphragm.
The first pole piece is fed.
The plurality of first pole pieces are transferred to the first surface of the first diaphragm and are sequentially arranged at intervals along the length direction of the first diaphragm.
The first diaphragm feeding comprises the following substeps:
discharging the first membrane. The first pole piece needs to be supported on the first surface of the first diaphragm, so the first diaphragm needs to be fed and spread first, and the first pole piece can be transferred. The produced diaphragm is generally stored and transported in a roll shape, so that the first diaphragm needs to be discharged firstly, and the roll-shaped first diaphragm becomes a strip-shaped belt. When the diaphragm material feeding device is applied specifically, the coiled first diaphragm can be fed by a feeding roller, the coiled first diaphragm is sleeved on the feeding roller, the coiled first diaphragm is driven to feed by rotating the feeding roller, and the fed first diaphragm is in a strip shape.
The first diaphragm is tensioned. The banding first diaphragm that the blowing came out need carry out just to bear the weight of first positive pole after the tensioning, avoids banding first diaphragm fold to appear, causes the influence to subsequent lamination process. When concrete application, the tensioning is carried out to first diaphragm to a plurality of tensioning rollers of accessible, and is concrete, and a plurality of tensioning rollers form the non-collinear mode of setting, and first diaphragm is around establishing on a plurality of tensioning rollers in proper order for first diaphragm is shakeout, tensioning. Preferably, one or more of the tension rollers is movable, so that the distance between the tension rollers is adjustable, thereby achieving the purpose of adjusting the tension of the first diaphragm.
The first membrane is electrostatically charged. First diaphragm after the tensioning needs to add the static processing through static production district to first diaphragm to increase the adsorption affinity of first diaphragm, be convenient for adsorb the first pole piece that follow-up transfer was come, avoided the first pole piece that transfers to come to produce the displacement on the first face of first diaphragm, and then influence the precision of follow-up electric core lamination. In a specific application, the first diaphragm may be subjected to an electrostatic treatment by using a blowing type electrostatic generator, for example, a negative ion generator, which may add static electricity to a surface of the first diaphragm facing the electrostatic generator, and may generate static electricity through the first diaphragm to another surface facing away from the electrostatic generator. After the static electricity is added, the first diaphragm is changed in conveying direction by the steering roller and is transferred to the vacuum conveying belt to be conveyed, and the first diaphragm is flatly laid on the vacuum conveying belt.
A first pole piece feeding comprising the sub-steps of:
and discharging the first pole piece. In order to facilitate storage and transportation, the produced pole piece is also in a roll shape, the roll-shaped first pole piece needs to be discharged firstly and is changed into a strip shape, a subsequent die cutting process can be carried out, and the first pole piece is divided into a plurality of flaky first pole pieces to participate in lamination. When the feeding device is applied specifically, the coiled first pole piece is fed by the feeding roller, the coiled first pole piece is sleeved on the feeding roller, and the feeding roller is rotated to drive the first pole piece to feed, so that the fed first pole piece is in a strip shape.
And caching the first pole piece. The strip-shaped first pole piece needs to be buffered, namely the strip-shaped first pole piece with a certain length is fed out for buffering, and the strip-shaped first pole piece pulled out from the buffering position is used for feeding, so that the operation of subsequent procedures is facilitated, and the replacement of the roll-shaped first pole piece is also facilitated. When the buffer roller is used specifically, a plurality of buffer rollers can be alternately arranged at intervals, so that the strip-shaped first pole piece with a certain length discharged by discharging is wound on the buffer rollers in sequence. Preferably, before the first pole pieces are cached by the cache rollers, a manual tape connecting position can be further arranged, so that the two rolls of the first pole pieces are connected end to end, and the rolled first pole pieces can be discharged smoothly.
The first pole piece is tensioned. The first banded pole piece after buffering needs to be tensioned, so that the phenomenon that wrinkles occur influence subsequent processes, such as deviation correction and die cutting, is avoided. A similar tension roller structure to the first diaphragm may be used for specific applications and will not be described further herein.
And rectifying the deviation of the first pole piece. The tensioned banded first pole piece needs to be rectified, so that the banded first pole piece can be conveyed along the set direction, and the accuracy of subsequent die cutting is guaranteed. When specifically using, the deviation of banding first pole piece can adopt the roller of rectifying to rectify, and here adopt current roller of rectifying can, and here is no longer repeated.
And die cutting the first pole piece. The rectified belt-shaped first pole piece needs to form a plurality of first pole pieces in a sheet shape, and then the first pole pieces can be transferred to the first diaphragm. The strip-shaped first pole piece is punched through the die cutting assembly, so that the strip-shaped first pole piece is changed into a plurality of flaky first pole pieces, and when the die cutting assembly is specifically applied, the existing die cutting mechanism can be adopted by the die cutting assembly, so that the details are not repeated. The first punched out sheet-like pole piece is transported by a vacuum conveyor belt to wait for being transferred to the first side of the first membrane to which static electricity has been applied.
The plurality of first pole pieces are transferred to the first surface of the first diaphragm and are sequentially arranged at intervals along the length direction of the first diaphragm. The plurality of first pole pieces need to be sequentially arranged at intervals along the length direction of the first diaphragm, and then the subsequent pole piece laminating process can be carried out. When the electrode plate is applied specifically, the first electrode plates of the plurality of sheet-shaped pieces after die cutting are grabbed by the electrode plate grabbing mechanism and are arranged at intervals in sequence, the distance between every two adjacent electrode plates is the same, and then the electrode plates are transferred to the first surface of the first diaphragm and are adsorbed by the first diaphragm which is added with static electricity. Specifically, the pole piece snatchs the transfer drive assembly that the mechanism has the linear module of multiunit to form, constitute by a plurality of absorption manipulators that set up side by side and shift and snatch the subassembly, the end of each absorption manipulator has CCD positioning system, it fixes a position the flaky first pole piece of piece after, adsorb first pole piece by the sucking disc of absorption manipulator again, afterwards, the linear module of multiunit drives a plurality of absorption manipulators respectively, make a plurality of absorption manipulators absorbent first pole piece after interval arrangement in proper order, shift again to first diaphragm on the first face. The transferred first pole pieces are sequentially arranged at intervals along the length direction of the first diaphragm, and the distance between every two adjacent first pole pieces is the same.
The second face of the second membrane being superposed on the first face of the first membrane, comprising the sub-steps of:
discharging the second membrane. The second diaphragm is tensioned. The second membrane is electrostatically charged. The discharging, tensioning and static adding processes of the second diaphragm are the same as those of the first diaphragm, and are not described again here. The second diaphragm is subjected to electrostatic treatment, so that the second surface of the subsequent second diaphragm can be adsorbed with the first diaphragm and the first pole piece when being superposed on the first surface of the first diaphragm, and the displacement of the first pole piece is avoided to influence the precision of the subsequent battery cell lamination. When the vacuum conveying belt is specifically applied, two adjacent conveying rollers are arranged at the tail end of the vacuum conveying belt for conveying the first diaphragm, a gap is formed between the two conveying rollers, the gap can enable the first pole piece, the first diaphragm and the second diaphragm to pass through simultaneously, the first diaphragm and the second diaphragm respectively pass through the two conveying rollers, and the conveying rollers rotate to drive the second diaphragm to be attached and adsorbed on the first diaphragm and cover the first pole piece. And after the first diaphragm, the first pole piece and the second diaphragm are attached together, the first diaphragm, the first pole piece and the second diaphragm are conveyed backwards continuously. Specifically, the first diaphragm, the first pole piece and the second diaphragm which are attached together are laminated belts, the two conveying rollers which are arranged side by side are arranged at the starting ends of the laminated belts, and the tail ends of the laminated belts are also provided with the side by side conveying rollers for bearing and pulling the laminated belts, so that the whole laminated belts are in a suspended state, and subsequent attachment of the second pole piece is facilitated.
Further, the first diaphragm and the second diaphragm are respectively attached to two sides of the plurality of first pole pieces, that is, the second side of the second diaphragm is overlapped with the first side of the first diaphragm, and the method further comprises the following steps: a plurality of pole piece bags are prepared by the second diaphragm and the first diaphragm, so that the first pole pieces are respectively positioned in the pole piece bags. Alternatively, the second membrane is thermally composited with the first membrane such that the plurality of first pole pieces are wrapped by the second membrane and the first membrane.
It will be appreciated that the membrane used as the laminate stock may be a single-sided rubberized membrane or a double-sided rubberized membrane. If a single-sided glued membrane is adopted, the second surface of the first membrane and the first surface of the second membrane are provided with glue, the first surface of the first membrane and the second surface of the second membrane which are used for clamping the first pole piece are not provided with glue, the first pole piece can be adsorbed on the first membrane and the second membrane through static electricity, but a stable structure cannot be formed, and the displacement of the first pole piece can be caused in the subsequent alternate laminating process, so that the alignment degree of the first pole piece is influenced. At the moment, a plurality of bags for containing the first pole pieces are prepared through the second diaphragm and the first diaphragm, so that a stable structure can be formed between the first pole pieces and the second diaphragm and between the first pole pieces and the first diaphragm, the first pole pieces are prevented from displacing relative to the second diaphragm and the first diaphragm, and the alignment degree of subsequent pole pieces is ensured. When the hot pressing machine is applied specifically, the bag making of the first diaphragm and the second diaphragm can be realized by hot pressing the first diaphragm and the second diaphragm on the periphery of the first pole piece through two heating rollers arranged side by side, so that the first diaphragm and the second diaphragm on the periphery of the first pole piece are combined together in a hot pressing mode to form a pole piece bag, and the first pole piece is wrapped.
If the first diaphragm and the second diaphragm adopt diaphragms with double-sided glue coating, the second diaphragm and the first diaphragm are thermally compounded, so that the plurality of first pole pieces are wrapped by the second diaphragm and the first diaphragm. When specifically using, can adopt the thermal radiation to realize the thermal recombination of first diaphragm and second diaphragm, and then realize the parcel to first pole piece. Of course, it is preferable that this step is not separately performed, and when the first separator and the second separator are double-sided rubberized separators, the second pole piece is attached and then thermally compounded together.
The second pole pieces are attached to the first diaphragm and the surface, back to the first pole piece, of the second diaphragm at intervals respectively, when the second pole pieces are attached, the second pole pieces are attached to the second surface of the first diaphragm firstly and then attached to the first surface of the second diaphragm, and therefore the second pole pieces attached to the same position can be subjected to batch operation, attachment efficiency is improved, and lamination efficiency is improved. Specifically, the plurality of second pole pieces are firstly attached to the second surface of the first diaphragm and then attached to the first surface of the second diaphragm, and the method comprises the following substeps:
and (5) feeding a second pole piece.
The plurality of second pole pieces are respectively transferred and attached to the second surface of the first diaphragm and the first surface of the second diaphragm.
The second pole piece feeding comprises the following substeps: discharging the second pole piece. And caching the second slice. The second pole piece is tensioned. And rectifying the deviation of the second pole piece. And die cutting the second pole piece. The feeding process of the second pole piece is consistent with that of the first pole piece, and details are not repeated here.
It can be understood that, in order to ensure the alignment between the first pole piece and the first pole piece, the alignment between the first pole piece and the second pole piece, and to ensure that a diaphragm exists between the adjacent first pole piece and the second pole piece after the alternating lamination, when the plurality of second pole pieces are respectively transferred to the second surface of the first diaphragm and the first surface of the second diaphragm, the plurality of first pole pieces and the plurality of second pole pieces are required to be aligned one by one, and the second pole piece attached to the second surface of the first diaphragm is adjacent to the second pole piece attached to the first surface of the second diaphragm. Specifically, the first pole pieces are arranged in sequence along the length direction of the first diaphragm, and the second pole pieces can adopt the following two corresponding modes when being transferred and attached, wherein one mode is that a plurality of second pole pieces are transferred and attached to the second surface of the first diaphragm, the second pole pieces attached to the second surface of the first diaphragm are opposite to the odd-numbered first pole pieces, the second pole pieces are transferred and attached to the first surface of the second diaphragm, and the second pole pieces attached to the first surface of the second diaphragm are opposite to the even-numbered first pole pieces; or, the other is that the plurality of second pole pieces are transferred and attached to the second surface of the first diaphragm, the second pole pieces attached to the second surface of the first diaphragm are opposite to the even-numbered first pole pieces, the plurality of second pole pieces are transferred and attached to the first surface of the second diaphragm, and the second pole pieces attached to the first surface of the second diaphragm are opposite to the odd-numbered first pole pieces. So can form, the second pole piece distributes in the both sides of first pole piece to the adjacent structure in interval, after the alternative coincide later, just can form the circulation coincide structure of first pole piece, diaphragm and second pole piece. When the diaphragm is specifically applied, the plurality of second pole pieces after die cutting can be transferred by the two pole piece grabbing mechanisms, one pole piece grabbing mechanism transfers the plurality of second pole pieces to the position right above the first surface of the second diaphragm, the plurality of second pole pieces are respectively right opposite to the odd-number-position first pole pieces one by one, and then the second diaphragm is placed on the first surface of the second diaphragm and adsorbed by the second diaphragm with static electricity. The other pole piece grabbing mechanism transfers the plurality of second pole pieces to the position right below the second surface of the first diaphragm, enables the plurality of second pole pieces to be respectively and directly opposite to the plurality of first pole pieces at the even number position one by one, and is then placed on the second surface of the first diaphragm and adsorbed by the first diaphragm added with static electricity.
Further, before alternately superposing a plurality of pole piece groups and enabling each two adjacent pole piece groups to be separated by the diaphragm, the method further comprises the following steps: the pole piece set is thermally compounded with the diaphragm. Specifically, the first membrane is thermally compounded with the second membrane. The glue on the first diaphragm and the second diaphragm is melted through the thermal compounding of the first diaphragm and the second diaphragm, and the glue is distributed and fused with the second pole piece to form a conforming structure of the second pole piece, the first diaphragm and the second diaphragm. If the first diaphragm and the second diaphragm adopt diaphragms with double-sided glue, the glue melted by the first diaphragm and the second diaphragm can be fused on the first pole piece to form a composite structure and a composite belt. In specific applications, the existing hot-pressing composite mechanism can be adopted, and the details are not repeated here.
Further, after the first diaphragm and the second diaphragm are thermally compounded, the method further comprises the following steps: the first diaphragm and the second diaphragm are destaticized. After the thermal compounding, a stable structure is formed among the first pole piece, the second pole piece, the first diaphragm and the second diaphragm, so that the adsorption effect of static electricity is not needed any more, the static electricity of the compound belt needs to be removed at the moment, and the influence on the subsequent production of the battery cell is avoided. In specific application, the ion-phoenix aluminum bar can be used for static elimination.
Further, alternately overlapping the plurality of pole piece groups so that two adjacent pole piece groups are separated by the diaphragm comprises the following substeps:
the diaphragm forms a plurality of imprints, and the imprints are arranged between two adjacent pole piece groups.
And applying the acting force in the same direction to the stamping at intervals, so that the plurality of pole piece groups are overlapped alternately.
Specifically, the first diaphragm and the second diaphragm are formed into a plurality of embossments, and each two adjacent pole piece groups are provided with the embossments. And applying acting force in the same direction to the stamping at intervals to enable the pole piece groups to be overlapped alternately, and further enable the first pole piece and the second pole piece to be overlapped alternately.
The first membrane and the second membrane are embossed, i.e. the composite strip is embossed, so that the subsequent force is applied at a point, and the embossing can make the position of the subsequent force applied in the alternate lamination accurate. In this embodiment, two sets of oppositely arranged matching blocks are used for imprinting the first composite diaphragm and the second composite diaphragm, so that the first composite diaphragm and the second composite diaphragm generate creases to facilitate the application of acting force. Each two adjacent first pole pieces are provided with embossments, and the embossments are sequentially arranged at intervals along the length direction of the first diaphragm.
Applying a force perpendicular to the first membrane to the even numbered embossments such that the even numbered embossments move in a direction perpendicular to the first membrane; the imprints of two adjacent odd numbers move along the direction parallel to the first diaphragm, and the imprints of two adjacent odd numbers are close to each other; the even-numbered imprints move in a direction parallel to the first membrane while moving in a direction perpendicular to the first membrane, so that the even-numbered imprints are always in the middle of the two odd-numbered imprints adjacent to the even-numbered imprints and have the same distance with the two odd-numbered imprints. Therefore, under the action of external force, a continuous V-shaped structure is formed, so that the first pole piece and the second pole piece are close to each other, and an alternately superposed structure of the first pole piece and the second pole piece is formed. In specific application, can adopt two kinds of function running rollers to realize, a set of running roller can move along the direction that is on a parallel with first diaphragm under the drive of driving piece, for example, X axis nature module, another group running roller can move along the direction that is on a parallel with perpendicular first diaphragm under the drive of driving piece, for example XY axis nature module, the running roller of two kinds of functions sets up at interval in proper order. Preferably, the roller moving in a direction perpendicular to the first diaphragm may take the shape of a strip or a rod to facilitate the application of the force for impressing the fold. After the lamination is finished, the first diaphragm and the second diaphragm after lamination can be cut off by a cutter.
Furthermore, the pole piece set is combined alternately, that is, after the first pole piece and the second pole piece are overlapped alternately, the method further comprises the following steps: forming a laminated assembly. And the first pole piece and the second pole piece which are alternately overlapped form a lamination assembly through a lamination table. In a specific application, the lamination table can move along with the roller which is moved in parallel with the first diaphragm so as to facilitate lamination.
Further, after forming the lamination assembly, the method further comprises the steps of: and pressing the laminated sheet assembly. Specifically, a cold press can be used to press the lamination assembly to form a whole.
Example two
To facilitate an understanding of the lamination method of the first embodiment, a lamination apparatus is now disclosed as a further description in the second embodiment. Referring to fig. 3 and 4, fig. 3 is a schematic structural view of a lamination device in the second embodiment, and fig. 4 is a schematic structural view of the lamination device in the second embodiment. The lamination device in this embodiment includes a first diaphragm feeding mechanism 1, a first diaphragm transmission mechanism 2, a first pole piece feeding mechanism 3, a first pole piece grabbing mechanism 4, a second diaphragm transmission mechanism 5, a diaphragm laminating mechanism 6, a second pole piece feeding mechanism 7, two second pole piece grabbing mechanisms 8, a hot-pressing and laminating mechanism 9, and a lamination mechanism 10. The first diaphragm feeding mechanism 1 is used for feeding a first diaphragm, the first diaphragm transmission mechanism 2 is used for transmitting the first diaphragm fed by the first diaphragm feeding mechanism 1, the first pole piece feeding mechanism 3 is used for feeding a first pole piece, the first pole piece grabbing mechanism 4 is used for transferring the first pole piece fed by the first pole piece feeding mechanism 3 to the first surface of the first diaphragm transmitted by the first diaphragm transmission mechanism 2, the second diaphragm transmission mechanism 5 is used for feeding a second diaphragm, the diaphragm overlapping mechanism 6 is used for overlapping the second surface of the second diaphragm on the first surface of the first diaphragm and covering the first pole piece, the second pole piece feeding mechanism 7 is used for feeding a second pole piece, the two second pole piece grabbing mechanisms 8 are respectively attached to the second surface of the first diaphragm and the first surface of the second diaphragm, the first pole piece and the second pole piece are attached to each other, the second pole piece on the second surface of the first diaphragm is adjacent to the second pole piece on the first surface of the second diaphragm, the hot-pressing composite mechanism 9 thermally composites the first diaphragm, the second diaphragm, the first pole piece and the second pole piece to form a composite belt, and the lamination mechanism 10 laminates the cover belt, so that the first pole piece and the second pole piece are alternately combined. Through the cooperation of each mechanism of lamination equipment, realize the automated production of electric core lamination, and the process is smooth, and the lamination is efficient, and then has promoted the production efficiency of electric core.
Referring back to fig. 3, further, the first membrane feeding mechanism 1 includes a membrane discharging assembly 11, a membrane tensioning assembly 12 and an electrostatic charging assembly 13. The membrane discharging assembly 11 has a discharging roller rotatably connected to a discharging support frame (not shown), and a first coiled membrane is sleeved on the discharging roller and can discharge along with the rotation of the discharging roller. When the material discharging device is used specifically, a motor can be used as a driver, the discharging roller is driven to rotate through a shaft connector, or the discharging roller is driven to rotate through the matching of a driving wheel, a synchronous belt and a driven wheel. The discharged strip-shaped first membrane can be passed through several rollers as a transition and then tensioned by the membrane tensioning assembly 12. The diaphragm tensioning assembly 12 in this embodiment may also be disposed on the support frame and located below the diaphragm discharging assembly 11, specifically, the diaphragm tensioning assembly 12 includes a plurality of tensioning rollers that are not arranged in a straight line, and one or more tensioning rollers may slide on the support frame, so that the distance between the tensioning rollers is adjustable, and the purpose of adjusting the tension of the first diaphragm is achieved. The tensioned first membrane extends below the membrane tensioning assembly 12 and is deflected by a deflection roller 14 so that the first membrane is deflected to the horizontal and continues to extend in the horizontal direction. The static adding component 13 is located between the steering roller 14 and the diaphragm tensioning component 12, the static adding component 13 can be arranged on the support frame, the static adding end faces the first diaphragm, static electricity is added to the passing diaphragm, in the embodiment, a blowing type static generator is adopted to add static electricity to two sides of the first diaphragm, for example, a negative ion generator.
Referring back to fig. 3, further, the first membrane transmission mechanism 2 is a vacuum conveyor belt, which is arranged along the horizontal direction, and the first membrane deflected by the deflecting roller 14 is conveyed by the first membrane transmission mechanism 2, which can perform vacuum adsorption conveying on the conveyed first membrane, so as to avoid the wrinkle of the first membrane.
Referring to fig. 3 again, further, the first pole piece feeding mechanism 3 includes a pole piece discharging assembly 31, a pole piece buffering assembly 32, a pole piece tensioning assembly 33, a pole piece deviation rectifying assembly 34, and a pole piece die cutting assembly 35. The pole piece discharging component 31 has a discharging roller and a supporting frame (not shown in the figure), and the actuation principle of the pole piece discharging component is consistent with that of the discharging roller and the supporting frame of the diaphragm discharging component 11, and the details are not repeated here; the difference between the two is that the discharging roller of the pole piece discharging assembly 31 is rotatably connected to a position close to the lower end of the support frame, because the weight of the pole piece roll is heavier than that of the diaphragm roll, which generally can reach about 700 kg, the discharging roller is arranged close to the lower end of the support frame, so that the first roll-shaped pole piece can be conveniently fed. The pole piece buffer assembly 32 is located above the pole piece feeding assembly 31 and comprises a plurality of buffer rollers alternately arranged at intervals, and the strip-shaped first pole piece discharged by the pole piece discharging assembly 31 is sequentially wound on the buffer rollers for buffer storage. Preferably, before the strip-shaped first pole piece enters the pole piece buffer assembly 32, a manual strip connecting position 321 may be provided, so as to facilitate the end-to-end connection between the two rolls of first pole pieces for material change. The pole piece tensioning assembly 33 is arranged on the support frame and located on one side of the pole piece buffer assembly 32, the buffered first pole piece is tensioned through the pole piece tensioning assembly 33, the structure and the actuation principle of the pole piece tensioning assembly 33 in the embodiment are consistent with those of the diaphragm tensioning assembly 12, and details are not repeated here. The pole piece deviation rectifying assembly 34 supports the frame and is located on one side of the pole piece tensioning assembly 33, the first pole piece after tensioning is rectified through the pole piece deviation rectifying assembly 34 to ensure accuracy of subsequent die cutting, the pole piece deviation rectifying assembly 34 in the embodiment can be realized by adopting an existing deviation rectifying roller, and details are not repeated here. The first pole piece after rectifying is punched into a sheet first pole piece through the pole piece die cutting component 35, the size of the specific first pole piece can be selected according to actual requirements, and the specific pole piece die cutting component 35 can adopt the existing die cutting mechanism. Preferably, a roller feeding 351 can be arranged on one side of the pole piece die cutting assembly 35 close to the pole piece deviation rectifying assembly 34 so as to facilitate the transfer of the first pole piece to the pole piece die cutting assembly 35, and a conveying drawstring (not shown in the figure) can be arranged on one side of the pole piece die cutting assembly 35 far away from the pole piece deviation rectifying assembly 34 so as to carry and convey the cut first pole piece. In particular arrangements, the roller feed 351, the pole piece die cutting assembly 35, and the transfer draw tape may be supported by another support frame (not shown). Preferably, the transfer draw tape is adjacent to the first membrane transfer means 2.
The first pole piece grabbing mechanism 4 is located above the first diaphragm conveying mechanism 2 and the conveying pull belt of the first pole piece feeding mechanism 3 and used for transferring the die-cut first pole piece to the first surface of the first diaphragm on the first diaphragm conveying mechanism 2. The first pole piece gripping mechanism 4 includes a transfer drive assembly 41 and a transfer gripping assembly 42. The transfer driving assembly 41 in this embodiment includes a plurality of sets of linear modules, the transfer grabbing assembly 42 includes a plurality of adsorption manipulators arranged side by side, each adsorption manipulator has a CCD positioning system at its end for positioning the first pole piece, and the adsorption manipulator also has a suction cup at its end for adsorbing the first pole piece. A plurality of absorption manipulators are connected with a plurality of linear modules respectively, it is concrete, an accessible support frame, for example, the portal frame, as bearing, a plurality of absorption manipulators and a plurality of linear module are all located on the support frame, wherein adsorb manipulator and support frame sliding connection, a plurality of linear module drive a plurality of absorption manipulators respectively and move, make a plurality of absorption manipulators remove respectively, and remove the top to the conveying stretching strap, fix a position the first pole piece after the cross cutting of conveying stretching strap conveying, adsorb, then shift to 2 tops of first diaphragm transmission mechanism, and interval arrangement is in proper order in the first face of first diaphragm, the first diaphragm that has added static adsorbs first pole piece.
Referring to fig. 3 again, further, the structure and the operation principle of the second membrane transmission mechanism 5 are the same as those of the first membrane feeding mechanism 1, and are not described herein again.
Referring to fig. 3 again, further, the diaphragm superposing mechanism 6 is disposed at the end of the first diaphragm transmission mechanism 2, the first diaphragm which has carried the first pole piece and is transmitted by the first diaphragm transmission mechanism 2 and the diaphragm which has been transmitted by the second diaphragm transmission mechanism 5 and has been subjected to static electricity are superposed by the diaphragm superposing mechanism 6, so that the second face of the second diaphragm is superposed and adsorbed on the first face of the first diaphragm and covers the first pole piece. Specifically, diaphragm coincide mechanism 6 includes two send the roller that sets up side by side, has the clearance between the two, and this clearance can make first pole piece, first diaphragm and second diaphragm pass through simultaneously, and first diaphragm and second diaphragm pass through between two send the roller, send the roller rotation, drive the laminating of second diaphragm and adsorb on first diaphragm to cover on first pole piece, form the lamination area.
Still further, referring to fig. 3, the lamination apparatus in this embodiment further includes a bag-making mechanism 20. The bag making mechanism 20 is arranged on one side of the diaphragm superposing mechanism 6, the laminated belt formed by the diaphragm superposing mechanism 6 forms a plurality of electrode sheet bags by making the first diaphragm and the second diaphragm through the bag making mechanism 20 by the bag making mechanism 20, and the electrode sheet bags wrap and load the plurality of first electrode sheets. Bag making mechanism 20 includes two warming mill that set up side by side, the warming mill sets up on the support frame side by side, the interval has between two warming mill, and be provided with one row of heating arch on the roll surface of warming mill, it is protruding all to be provided with round heating at the position that is close to warming mill both ends, when two warming mill rotate, but heating arch butt on the roll surface of two warming mill, but heating arch butt each other at two warming mill both ends, so, when first diaphragm and second diaphragm have the interval to pass through from between two warming mill, the heating arch of two warming mill can carry out hot pressing to first diaphragm and the second diaphragm of first pole piece outlying, make first diaphragm and the compound of second diaphragm hot pressing of first pole piece outlying be in the same place, form the pole piece bag, form the parcel structure to first pole piece, accomplish the bag making process.
The laminated belt after bag making is continuously conveyed, a group of side-by-side conveying rollers (not shown in the figure) are arranged on one side close to the bag making mechanism 20 and one side far away from the bag making mechanism 20, and the two ends of the laminated belt are carried and conveyed by the two groups of side-by-side conveying rollers, so that the laminated belt is in a suspended state, and subsequent second pole pieces are conveniently attached.
Referring to fig. 3 again, further, the structure and the operation principle of the second pole piece feeding mechanism 7 are the same as those of the first pole piece feeding mechanism 3, and are not described herein again. The second pole pieces subjected to die cutting and loaded by the second pole piece loading mechanism 7 are respectively grabbed and transferred to two sides of the suspended lamination belt by the two second pole piece grabbing mechanisms 8, namely, the second pole pieces are grabbed and respectively transferred to one surface of the second diaphragm and the second surface of the first diaphragm. The structure and the action principle of the second pole piece grabbing mechanisms 8 are consistent with those of the first pole piece grabbing mechanisms 4, when the two second pole piece grabbing mechanisms 8 are arranged specifically, the upper part and the lower part are arranged side by side, a second pole piece grabbing mechanism 8 positioned above is used for grabbing a plurality of second pole pieces firstly and transferring the second pole pieces to a second pole piece grabbing mechanism 8 positioned below, then the second pole piece grabbing mechanism 8 positioned above grabs a plurality of second pole pieces, then two second pole piece grabbing mechanisms 8 transfer the plurality of second pole pieces to the upper side and the lower side of the suspended lamination belt together, then the second pole piece grabbing mechanism 8 positioned above transfers the plurality of second pole pieces to one surface of a second diaphragm, and is opposite to the odd-numbered first pole pieces, and the second pole piece grabbing mechanism 8 positioned below transfers the second pole pieces to the second surface of the first diaphragm and is opposite to the even-numbered first pole pieces.
Referring to fig. 4 again, further, the laminated tape adsorbing the second pole piece is continuously conveyed to the thermal compression lamination mechanism 9. The hot-pressing composite mechanism 9 can adopt the existing hot-pressing composite machine, after the lamination belt passes through, the glue of the first diaphragm and the second diaphragm is fused, so that the whole lamination belt forms a composite structure to form a fitting belt. The hot-pressing composite mechanism 9 continues to roll to convey the composite belt, and during the conveying process, the composite belt is subjected to static electricity removal through a static electricity removal mechanism (not shown in the figure), for example, an ion-phoenix aluminum bar can be used for static electricity removal.
Still further, referring to fig. 4, the lamination apparatus in this embodiment further includes an embossing mechanism 30. The composite tape after static electricity removal is embossed by the embossing mechanism 30. Specifically, the stamping mechanism 30 includes two sets of matching blocks arranged in opposite directions, and stamps on the composite tape through the two sets of matching blocks arranged in opposite directions, so that stamps arranged in sequence are formed on the composite tape along the length direction of the composite tape, and a stamp is formed between every two adjacent first pole pieces, so as to facilitate the acting force of the subsequent lamination.
Still further, referring to fig. 4, the lamination mechanism 10 includes a plurality of first lamination assemblies 101, a plurality of second lamination assemblies 102, and a lamination station 103. Each first lamination assembly 101 includes a first driving member and a first roller, an output end of the first driving member is connected to the first roller, and the first driving member drives the first roller to move along a direction parallel to the first diaphragm. Each second lamination assembly 102 includes a second driving member and a second roller, an output end of the second driving member is connected to the second roller, and the second driving member drives the second roller to move along a direction parallel to and perpendicular to the first diaphragm. During lamination, the second driving element drives the second roller to drive the even-numbered imprints to move downwards and move towards the direction close to the imprinting mechanism 30, and meanwhile, the first driving element drives the first roller to drive the odd-numbered imprints to mutually move close to each other, so that the composite belt forms a continuous V-shaped structure, and the first pole piece and the second pole piece are alternately overlapped. When moving, the second roller is located between two adjacent first rollers, and the distance between the second roller and two adjacent first rollers is equal. Preferably, the first roller and the second roller can adopt a shape of a slender strip or a slender rod, so that the bearing and the application of the acting force are facilitated. A lamination station 103 is associated with the end of the composite strip, which can be moved in a direction parallel to the first diaphragm, the lamination station 103 being moved towards the embossing mechanism 30 by the linear die set during lamination. After lamination is completed, the first diaphragm and the second diaphragm after lamination can be cut off by using a cutter, and then the lamination station 103 forms a lamination assembly, wherein the lamination station 103 can be an existing lamination station.
Still further, referring to fig. 4, the lamination apparatus in this embodiment further includes a cold press 40. The lamination assembly is transferred to the cold press 40 through the four-axis robot, and is pressed through the cold press, so that the lamination assembly substantially forms a whole body, and subsequent operation is facilitated.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (11)
1. A method of laminating, comprising:
a plurality of pole piece groups are sequentially attached to a diaphragm, and the diaphragm separates the pole piece groups;
and alternately overlapping a plurality of the pole piece groups, so that every two adjacent pole piece groups are separated by the diaphragm.
2. The lamination process according to claim 1, wherein the set of pole pieces comprises a first pole piece and a second pole piece, the diaphragm comprises a first diaphragm and a second diaphragm; a plurality of pole piece groups are arranged in sequence on a diaphragm, the diaphragm separates the pole piece groups, and the diaphragm comprises:
the first diaphragm and the second diaphragm are respectively attached to two surfaces of the first pole pieces;
the second pole pieces are respectively attached to the first diaphragm and the second diaphragm at intervals, wherein the surfaces of the second pole pieces, back to the first pole piece, are attached to the first diaphragm, and are adjacent to the second pole pieces attached to the second diaphragm.
3. The lamination method according to claim 2, wherein the first and second diaphragms are respectively attached to two sides of the first pole pieces, and the method comprises:
the first pole pieces are attached to the first diaphragm;
the second diaphragm is overlapped on the first diaphragm and covers the first pole pieces.
4. The lamination method according to claim 2, wherein the second pole pieces are respectively attached to the first diaphragm at intervals, and the surfaces of the second diaphragm, which face away from the first pole piece, comprise:
the second pole pieces are attached to the first diaphragm and are opposite to the odd-numbered first pole pieces; the second pole pieces are attached to the second diaphragm and are opposite to the first pole pieces at the even number positions; or
The second pole pieces are attached to the first diaphragm and are opposite to the first pole pieces at the even number positions; the second pole pieces are attached to the second diaphragm in a transferring mode and are opposite to the odd-numbered first pole pieces.
5. The lamination method according to claim 1, wherein alternately superposing a plurality of the plate groups such that adjacent two of the plate groups are each separated by the separator comprises:
the diaphragm forms a plurality of imprints, and the imprints are arranged between two adjacent pole piece groups;
and applying the acting force in the same direction to the stamping at intervals, so that the pole piece groups are overlapped alternately.
6. The lamination method according to claim 1, wherein, before alternately laminating a plurality of the plate groups so that each of the adjacent two plate groups is separated by the separator, the lamination method further comprises:
the group of plates is thermally composited with the diaphragm.
7. The lamination method according to claim 2, wherein the first and second diaphragms are respectively attached to two sides of the first pole pieces, and further comprising:
and preparing a plurality of pole piece bags by the second diaphragm and the first diaphragm, so that the plurality of first pole pieces are respectively positioned in the plurality of pole piece bags.
8. A lamination process according to any one of claims 1 to 7, wherein a plurality of groups of pole pieces are sequentially applied to the diaphragm, comprising:
feeding the diaphragm;
feeding the pole piece group;
a plurality of the plate groups are sequentially transferred to the separator and separated by the separator.
9. The lamination process according to claim 8, wherein the membrane loading comprises:
discharging the membrane;
the diaphragm is tensioned;
the diaphragm is electrostatically charged.
10. The lamination process according to claim 8, wherein said pole piece assembly is loaded, comprising:
discharging the pole piece;
tensioning the pole piece;
and die cutting the pole piece.
11. The lamination process according to claim 10, further comprising, prior to die cutting the pole pieces:
and (5) rectifying the deviation of the pole piece.
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| EP4369447A4 (en) * | 2022-01-07 | 2024-11-20 | Contemporary Amperex Technology (Hong Kong) Limited | METHOD AND APPARATUS FOR STACKING ELECTRODE PLATES, AND STACKER |
| CN114665163A (en) * | 2022-03-11 | 2022-06-24 | 上海兰钧新能源科技有限公司 | Composite lamination equipment and composite lamination process |
| CN115352939A (en) * | 2022-10-19 | 2022-11-18 | 常州盛沅新材料科技有限公司 | Packaging film winding and unwinding device |
| WO2025055160A1 (en) * | 2023-09-11 | 2025-03-20 | 湖北亿纬动力有限公司 | Pretreatment assembly, electrode sheet lamination apparatus, and electrode sheet lamination method |
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Application publication date: 20210202 |