CN112615060A - Lamination method of laminated battery cell - Google Patents
Lamination method of laminated battery cell Download PDFInfo
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- CN112615060A CN112615060A CN202110031947.9A CN202110031947A CN112615060A CN 112615060 A CN112615060 A CN 112615060A CN 202110031947 A CN202110031947 A CN 202110031947A CN 112615060 A CN112615060 A CN 112615060A
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- pole piece
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- composite
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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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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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- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a lamination method of a laminated battery cell, which comprises the following steps: step S1, providing a plurality of composite pole pieces which are sequentially connected along a first direction, wherein each composite pole piece comprises two diaphragms, a first pole piece and a plurality of second pole pieces, the first pole piece is clamped between the two diaphragms, and the second pole pieces are opposite to the first pole pieces in polarity; step S2, placing the composite pole piece at one end on a lamination platform, and placing a second pole piece on the composite pole piece on the lamination platform; step S3, respectively placing a second pole piece on the upper side surface and the lower side surface of a second composite pole piece adjacent to the lamination platform to form a pole piece assembly, turning over the first composite pole piece adjacent to the lamination platform to be laminated with the second pole piece on the lamination platform, and laminating the pole piece assembly on the composite pole piece on the lamination platform; and S4, repeating the step S3, laminating a plurality of composite pole pieces together, and enabling a second pole piece to be arranged between every two adjacent composite pole pieces. The lamination machine has the characteristics of high lamination speed and high working efficiency.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a lamination method of a lamination battery core.
Background
The electric core of the current lithium battery mainly comprises a winding type electric core and a laminated type electric core. The production technology of the laminated battery cell is complex, a plurality of positive plates and a plurality of negative plates need to be laminated together in a staggered manner, and the positive plates and the negative plates need to be separated by a diaphragm. In the existing production process, a positive plate, a negative plate and a diaphragm are stacked together in sequence from bottom to top according to a certain sequence to form a laminated battery core. The mode has low operation speed and low production efficiency.
Disclosure of Invention
The invention aims to provide a lamination method of a laminated battery cell, which is high in lamination speed and high in working efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the lamination method of the laminated battery cell comprises the following steps:
step S1, providing a plurality of composite pole pieces which are sequentially connected along a first direction, wherein each composite pole piece comprises two diaphragms, a first pole piece and a plurality of second pole pieces, the first pole piece is clamped between the two diaphragms, and the polarity of the second pole pieces is opposite to that of the first pole piece;
step S2, placing the composite pole piece at one end on a lamination platform, and placing one second pole piece on the composite pole piece on the lamination platform;
step S3, respectively placing a second pole piece on the upper side surface and the lower side surface of a second composite pole piece adjacent to the lamination platform to form a pole piece assembly, folding the first composite pole piece adjacent to the lamination platform to enable the first composite pole piece to be overlapped with the second pole piece on the lamination platform, and enabling the pole piece assembly to be overlapped on the composite pole piece on the lamination platform;
and step S4, repeating the step S3, laminating a plurality of composite pole pieces together along the vertical direction, and enabling one second pole piece to be arranged between every two adjacent composite pole pieces.
Furthermore, a plurality of the composite pole pieces form an integral structure by adopting a thermal composite process.
Further, still provide clip mechanism, clip mechanism include drive assembly and with the clip subassembly that drive assembly connects, drive assembly drive the clip subassembly is carried the pole piece subassembly, the clip subassembly will the pole piece subassembly transport to the top of lamination platform, and will the pole piece subassembly is placed on the compound pole piece.
Furthermore, the clamping piece subassembly is two, two the clamping piece subassembly sets up along the second direction interval to make two clamping piece subassemblies follow the second direction centre gripping is in the both ends of pole piece subassembly, the second direction with first direction is perpendicular.
Further, the pole piece assembly is clamped at one end, close to the lamination platform, of the pole piece assembly.
Further, the lamination method of the laminated cell further comprises the following steps:
detecting the position of the first pole piece in the pole piece assembly to be conveyed, and determining whether the position of the first pole piece in the pole piece assembly to be conveyed corresponds to the position of the clamping piece assembly;
and under the condition that the position of the first pole piece in the pole piece assembly to be conveyed does not correspond to the position of the clamping piece assembly, adjusting the position of the first pole piece in the pole piece assembly to be conveyed.
Furthermore, the clamping piece mechanism has two, two the clamping piece mechanism is followed first direction interval sets up, two in the clamping piece mechanism, as one in the two clamping piece mechanism centre gripping the pole piece subassembly will the pole piece subassembly transports to when on the lamination platform, another in the two the clamping piece mechanism is in can the centre gripping treat transporting the position of pole piece subassembly.
The pressing device is used for selectively pressing the second pole piece on the lamination platform, when the composite pole piece is turned, the pressing device presses the second pole piece on the lamination platform, and when the pole piece assembly is conveyed to be laminated on the composite pole piece, the pressing device presses the second pole piece positioned on the top.
Furthermore, the pressing device is pressed against one end, close to the composite pole piece to be folded, of the second pole piece.
Further, the first pole piece is a negative pole piece, the second pole piece is a positive pole piece, and the orthographic projection area of the first pole piece on the second pole piece covers the second pole piece.
Compared with the prior art, the invention has the beneficial effects that:
according to the lamination method of the laminated battery cell, the plurality of composite pole pieces are sequentially connected, two second pole pieces are placed on two side faces of the second composite pole piece adjacent to the lamination platform to form a pole piece assembly, and the first composite pole piece adjacent to the lamination platform is turned over and the pole piece assembly is laminated on the first composite pole piece. In the lamination process, two composite pole pieces and two second pole pieces can be stacked together by one-time lamination operation of the clamping piece mechanism, and the lamination device has the characteristics of high lamination speed and high working efficiency.
Drawings
Fig. 1 is a schematic view of the clip mechanism of the embodiment when stacked.
Fig. 2 is a partial cross-sectional view of a laminated cell of an embodiment after lamination.
Fig. 3 is a partial cross-sectional view of another embodiment of a laminated cell laminate.
In the figure:
1. compounding pole pieces; 10. a diaphragm; 11. a first pole piece; 12. a first composite pole piece; 13. a second composite pole piece; 2. a second pole piece; 3. a lamination platform; 4. a clip mechanism; 41. a clip assembly; 42. a drive assembly; 5. pressing a plate; 6. a feeding device.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1 to 3, the present invention provides a lamination method of a laminated cell for producing the laminated cell. The lamination method comprises the following steps:
step S1, providing a plurality of composite pole pieces 1 connected in sequence along a first direction, wherein each composite pole piece 1 comprises two diaphragms 10, a first pole piece 11 sandwiched between the two diaphragms 10, and a plurality of second pole pieces 2, and the polarity of the second pole pieces 2 is opposite to that of the first pole pieces 11;
step S2, placing the composite pole piece 1 at one end on a lamination platform 3, and placing a second pole piece 2 on the composite pole piece 1 on the lamination platform 3;
step S3, respectively placing a second pole piece 2 on the upper side surface and the lower side surface of a second composite pole piece 1 adjacent to a lamination platform 3 to form a pole piece assembly, folding the first composite pole piece 1 adjacent to the lamination platform 3 to be laminated with the second pole piece 2 on the lamination platform 3, and laminating the pole piece assembly on the composite pole piece 1 on the lamination platform 3;
and step S4, repeating the step S3, laminating a plurality of composite pole pieces 1 together along the vertical direction, and enabling a second pole piece 2 to be arranged between every two adjacent composite pole pieces 1.
It can be understood that the battery cell is formed by stacking a plurality of positive plates and a plurality of negative plates in an opposite staggered manner, so that one negative plate is arranged between two adjacent positive plates, and the positive plates and the negative plates are separated by the diaphragm 10. In this embodiment, one of the first pole piece 11 and the second pole piece 2 is a positive pole piece, and the other is a negative pole piece. The diaphragms 10 are arranged on the upper side face and the lower side face of the first pole piece 11, so that the first pole piece 11 and the diaphragms 10 form the composite pole piece 1, and when the second pole piece 2 is directly laminated with the composite pole piece 1, the second pole piece and the composite pole piece are separated by the diaphragms 10, so that the operation of laminating the diaphragms 10 is reduced during lamination, and the operation efficiency is improved. Preferably, the first tab 11 is a negative tab, the second tab 2 is a positive tab, and an orthographic projection area of the first tab 11 on the second tab 2 covers the second tab 2. That is, the size of the first pole piece 11 is larger than that of the second pole piece 2, so as to improve the cell performance. The multiple composite pole pieces 1 are sequentially connected along a first direction (shown in the figure as the Y direction), so that the multiple composite pole pieces 1 are combined together in a long chain shape and conveyed to a lamination position through a conveying mechanism. The lamination platform 3 is used for placing the laminated composite pole piece 1 and the second pole piece 2, when lamination is started, the composite pole piece 1 located at one end close to the lamination platform 3 is fixed on the lamination platform 3 through manual operation, and the second pole piece 2 is placed on the composite pole piece 1 located on the lamination platform 3. And then, carrying out lamination operation through automatic production equipment, wherein the first composite pole piece 1 adjacent to the lamination platform 3 is a first composite pole piece 12, the second composite pole piece 1 adjacent to the lamination platform 3 is a second composite pole piece 13, and the first composite pole piece 12 is positioned between the lamination platform 3 and the second composite pole piece 13. And respectively placing a second pole piece 2 on the upper side and the lower side of a second composite pole piece 13, so that the second composite pole piece 13 and the two second pole pieces 2 form a pole piece assembly, clamping the pole piece assembly by using a clamping piece mechanism 4 and moving the pole piece assembly to the upper side of a lamination platform 3 during lamination, wherein the pole piece assembly is opposite to and spaced from the lamination platform, at the moment, a first composite pole piece 1 (namely, a first composite pole piece 12) adjacent to the lamination platform 3 is turned over to the upper side of the second pole piece 2 on the lamination platform 3, and the first composite pole piece 12 is positioned between the pole piece assembly and the second pole piece 2 placed on the lamination platform 3. The clamping piece mechanism 4 continues to drive the pole piece assembly to descend until the pole piece assembly is laminated with the composite pole piece 1 and the second pole piece 2 on the lamination platform 3. In this case, the composite pole piece 1 located uppermost on the lamination platform 3 has a second pole piece 2. The operation is circulated, namely a plurality of composite pole pieces 1 and a plurality of second pole pieces 2 are laminated together, one second pole piece 2 is arranged between two adjacent composite pole pieces 1, and meanwhile, the first pole piece 11 and the second pole piece 2 are separated through the diaphragm 10 to form a laminated battery cell. In the lamination process, two composite pole pieces 1 and two second pole pieces 2 can be stacked together by one-time lamination operation of the clamping piece mechanism 4, and the lamination device has the characteristics of high lamination speed and high working efficiency.
Specifically, a plurality of composite pole pieces are formed into an integral structure by adopting a thermal compounding process. It can be understood that a plurality of composite pole pieces 1 are connected in sequence to form a long chain, so that when the clamping mechanism 4 conveys the pole piece assembly to the upper side of the lamination platform 3, the composite pole pieces 1 on one side far away from the lamination platform 3 are directly dragged to move towards the direction of the lamination platform 3 in sequence, and feeding is realized.
In other embodiments, referring to fig. 3, the diaphragms 10 may also be provided as an integral structure, and the first pole piece 11 is a single structure, that is, a plurality of first pole pieces 11 are spaced between two diaphragms 10 along the first direction. After lamination, a plurality of first pole pieces 11 and a plurality of second pole pieces 2 are alternately laminated together, and each first pole piece 11 and each second pole piece 2 are separated by a diaphragm 10. This mode can avoid cutting the bending section at both ends again behind the lamination to improve work efficiency.
Specifically, a clamping mechanism 4 is further provided, the clamping mechanism 4 comprises a driving assembly 42 and a clamping assembly 41 connected with the driving assembly 42, the driving assembly 42 drives the clamping assembly 41 to clamp the pole piece assembly, and the clamping assembly 41 conveys the pole piece assembly to the upper part of the lamination platform 3 and places the pole piece assembly on the composite pole piece 1. In this embodiment, the clip assembly 41 includes two oppositely disposed clamping plates, and the pole piece assembly is loosened and clamped by opening and closing the two clamping plates. The drive assembly 42 includes a plurality of drive motors to drive the jaw assembly 41 to grip and release the pole piece assembly and to move and rotate the pole piece assembly. The pole piece assembly is clamped through the clamping piece assembly 41, so that the clamping piece assembly 41 clamps one composite pole piece 1 and two second pole pieces 2 at a time and conveys the composite pole piece 1 and the two second pole pieces 2 to the lamination platform 3, the second pole pieces 2 are prevented from being conveyed independently, and the improvement of the working efficiency is facilitated.
In order to improve the lamination quality and ensure the stability of the pole piece assembly when the two clamping piece assemblies 41 convey the pole piece assembly, the two clamping piece assemblies 41 are arranged at intervals along the second direction, and the two clamping piece assemblies 41 are clamped at the two ends of the pole piece assembly along the second direction, which is perpendicular to the first direction. In this embodiment, the second direction is the illustrated X direction, and the composite pole piece 1 is located between two clip assemblies 41. During lamination, the two clamping pieces 41 respectively clamp the two opposite ends of the pole piece assembly, so that the stability of the pole piece assembly during movement is improved, and downward bending caused by suspension of one end of the pole piece assembly is avoided. This way, when clip subassembly 41 drove the pole piece subassembly and moved to the top of lamination platform 3, guarantee that pole piece subassembly and lamination platform 3 keep parallel to guarantee lamination quality.
Specifically, in step S3, the pole piece assembly is clamped by the clip assembly 41, and the clip assembly 41 is clamped at one end of the pole piece assembly close to the lamination platform. It can be understood that, during lamination, the pole piece assemblies corresponding to the first composite pole piece 12 and the second composite pole piece 13 need to be laminated together, that is, the joint of the first composite pole piece 12 and the second composite pole piece 13 is bent. When clamping the pole piece assembly, the clamping is at one end of the pole piece assembly close to the lamination platform 3, that is, the clamping piece assembly 41 is clamped at one end of the pole piece assembly close to the first composite pole piece 12, and this way is favorable for bending between the first composite pole piece 12 and the second composite pole piece 13. Preferably, one side of the clip assembly 41 coincides with an intersection line between the first composite pole piece 12 and the second composite pole piece 13, so that when the first composite pole piece 12 is folded, the second composite pole piece 13 is prevented from being bent and deformed by being pulled at a bending position.
Specifically, there are two clamping piece mechanisms 4, and two clamping piece mechanisms 4 set up along first direction interval, and in two clamping piece mechanisms 4, when one clamping piece mechanism 4 centre gripping pole piece subassembly in the two and transport pole piece subassembly to lamination platform 3 on, another clamping piece mechanism 4 in the two is in the position that can the centre gripping pole piece subassembly of treating transporting. It will be appreciated that the two jaw mechanisms 4 are spaced apart and symmetrically arranged, and that the two jaw mechanisms 4 are rotatable about a centre line of symmetry therebetween to cause the respective two jaw assemblies 41 of the two jaw mechanisms 4 to move cyclically between the position of the lamination platform 3 and the position of the second composite pole piece 13. This mode has avoided the jaw subassembly 41 to loosen the pole piece subassembly after the motion to the time of empting appear when the position of the compound pole piece 13 of second, through the circulation lamination operation of two jaw mechanisms 4, further improves lamination efficiency.
Specifically, a pressing device is further provided, the pressing device comprises a driving part and a pressing plate 5 connected with the driving part, and the driving part drives the pressing plate 5 to selectively press the composite pole piece 1 and the second pole piece 2 on the lamination platform 3. When the composite pole piece 1 is turned over, the second pole piece 2 is always arranged on the uppermost portion of the lamination platform 3, the pressing plate 5 is used for pressing the second pole piece 2 on the lamination platform 3, and the laminated composite pole piece 1 and the laminated second pole piece 2 on the lamination platform 3 are all pressed on the lamination platform 3, so that looseness is avoided. After the clamping mechanism 4 conveys the pole piece assembly to be laminated on the composite pole piece 1, the pole piece assembly and the first composite pole piece 12 which is folded and folded are laminated on the second pole piece 2, and at the moment, the pressing plate 5 is positioned between the second pole piece 2 and the first composite pole piece 12. The driving part drives the pressing plate 5 to move away from the lamination platform 3, so that the pressing plate 5 is separated from the second pole piece 2. Then the pressing plate 5 moves to the upper part of the pole piece assembly and is pressed against the second pole piece 2 positioned at the uppermost part. After the pressing plate 5 presses the second pole piece 2 located at the top, the clamping piece assembly 41 releases the pole piece assembly and returns to the position of the second composite pole piece 13 for the next lamination operation.
In order to facilitate the bending of the end of the first composite pole piece 12 close to the lamination platform 3, the pressing plate 5 is pressed against the end of the second pole piece 2 close to the composite pole piece 1 to be folded. In this embodiment, the composite pole piece 1 to be folded is referred to as a first composite pole piece 12, and during lamination, the first composite pole piece 12 needs to be turned 180 degrees along an intersection line between the first composite pole piece 12 and the second pole piece 2 located at the top of the lamination platform 3. Preferably, the intersection line between the first composite pole piece 12 and the second pole piece 2 coincides with the side edge of the pressing plate 5, which is beneficial to enabling the first composite pole piece 12 to turn over along the intersection line, and preventing the bending position of the first composite pole piece 12 from pulling the composite pole piece 1 on the lamination platform 3 to bend.
Specifically, the lamination method of the laminated cell further includes:
detecting the position of a first pole piece 11 in the pole piece assembly to be conveyed, and determining whether the position of the first pole piece 11 in the pole piece assembly to be conveyed corresponds to the position of the clamping piece assembly 41;
and under the condition that the position of the first pole piece 11 in the pole piece assembly to be conveyed does not correspond to the position of the clamping piece assembly 41, adjusting the position of the first pole piece 11 in the pole piece assembly to be conveyed.
It can be understood that the pole piece assembly 41 transports the pole piece assembly to the lamination platform 3 according to a fixed path for lamination operation, detects whether a position deviation exists between the first pole piece 11 and the clip assembly 41, and corrects the position deviation so as to ensure that the pole piece assembly can be aligned with the first pole piece 11 or the second pole piece 2 laminated on the lamination platform 3 after being transported to the lamination platform 3, so as to ensure the lamination quality.
Specifically, one side of lamination platform 3 is provided with feedway 6, feedway 6 is used for placing compound pole piece 1, and compound pole piece 1 moves towards lamination platform 3's direction from feedway 6.
The remarkable effects of the embodiment are as follows: a plurality of composite pole pieces 1 are connected in sequence, two second pole pieces 2 are placed on two side faces of the second composite pole piece 1 adjacent to a lamination platform 3 to form a pole piece assembly, the first composite pole piece 1 adjacent to the lamination platform 3 is turned over, and the pole piece assembly is stacked on the first composite pole piece 1. In the lamination process, two composite pole pieces 1 and two second pole pieces 2 can be stacked together by one-time lamination operation of the clamping piece mechanism 4, and the lamination device has the characteristics of high lamination speed and high working efficiency.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A method for laminating laminated cells is characterized by comprising the following steps:
step S1, providing a plurality of composite pole pieces which are sequentially connected along a first direction, wherein each composite pole piece comprises two diaphragms, a first pole piece and a plurality of second pole pieces, the first pole piece is clamped between the two diaphragms, and the polarity of the second pole pieces is opposite to that of the first pole piece;
step S2, placing the composite pole piece at one end on a lamination platform, and placing one second pole piece on the composite pole piece on the lamination platform;
step S3, respectively placing a second pole piece on the upper side surface and the lower side surface of a second composite pole piece adjacent to the lamination platform to form a pole piece assembly, folding the first composite pole piece adjacent to the lamination platform to enable the first composite pole piece to be overlapped with the second pole piece on the lamination platform, and enabling the pole piece assembly to be overlapped on the composite pole piece on the lamination platform;
and step S4, repeating the step S3, laminating a plurality of composite pole pieces together along the vertical direction, and enabling one second pole piece to be arranged between every two adjacent composite pole pieces.
2. The method of claim 1, wherein the plurality of composite pole pieces are formed into a unitary structure by a thermal compounding process.
3. The method according to claim 1, wherein a clip mechanism is further provided, the clip mechanism includes a driving assembly and a clip assembly connected to the driving assembly, the driving assembly drives the clip assembly to clip the pole piece assembly, the clip assembly transports the pole piece assembly above the lamination platform and places the pole piece assembly on the composite pole piece.
4. The method according to claim 3, wherein the number of the clip assemblies is two, and the two clip assemblies are spaced apart from each other along a second direction, and are clamped at two ends of the pole piece assembly along the second direction, and the second direction is perpendicular to the first direction.
5. The method of laminating a laminated cell according to claim 4, wherein the pole piece assembly is clamped at one end of the pole piece assembly close to the lamination platform.
6. The method of laminating a laminated cell according to claim 3, further comprising:
detecting the position of the first pole piece in the pole piece assembly to be conveyed, and determining whether the position of the first pole piece in the pole piece assembly to be conveyed corresponds to the position of the clamping piece assembly;
and under the condition that the position of the first pole piece in the pole piece assembly to be conveyed does not correspond to the position of the clamping piece assembly, adjusting the position of the first pole piece in the pole piece assembly to be conveyed.
7. The method of claim 3, wherein there are two of the clip mechanisms, and two of the clip mechanisms are spaced apart along the first direction, and wherein when one of the two clip mechanisms grips the pole piece assembly and transports the pole piece assembly to the lamination platform, the other of the two clip mechanisms is in a position capable of gripping the pole piece assembly to be transported.
8. The method according to claim 3, wherein a pressing device is further provided, the pressing device is configured to selectively press against the second pole piece on the lamination platform, the pressing device presses against the second pole piece on the lamination platform when the composite pole piece is folded, and the pressing device presses against the second pole piece located at the top when the pole piece assembly is transported by the clip assembly and stacked on the composite pole piece.
9. The method according to claim 8, wherein the pressing device presses against an end of the second pole piece close to the composite pole piece to be folded.
10. The method according to claim 1, wherein the first pole piece is a negative pole piece, the second pole piece is a positive pole piece, and an orthographic projection area of the first pole piece on the second pole piece covers the second pole piece.
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| CN202110031947.9A CN112615060A (en) | 2021-01-11 | 2021-01-11 | Lamination method of laminated battery cell |
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| CN202110031947.9A CN112615060A (en) | 2021-01-11 | 2021-01-11 | Lamination method of laminated battery cell |
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Cited By (1)
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| CN114024013A (en) * | 2021-09-27 | 2022-02-08 | 无锡奥特维智能装备有限公司 | Laminated sheet body, battery cell stacking device and method |
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