CN215527759U - Lithium device is mended to pole piece - Google Patents
Lithium device is mended to pole piece Download PDFInfo
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- CN215527759U CN215527759U CN202122146450.XU CN202122146450U CN215527759U CN 215527759 U CN215527759 U CN 215527759U CN 202122146450 U CN202122146450 U CN 202122146450U CN 215527759 U CN215527759 U CN 215527759U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to the technical field of lithium battery manufacturing, and discloses a pole piece lithium supplementing device. Lithium device is mended to pole piece includes: the first calendering conveying mechanism comprises a first calendering roller, a first supporting roller and a first isolating film wound on the first calendering roller and the first supporting roller, and the first calendering roller drives the first isolating film to move synchronously; the first calendering and laminating mechanism comprises a second calendering roller, a first transfer roller and a second isolating film wound on the second calendering roller and the first transfer roller, and the second calendering roller drives the second isolating film to move synchronously; the second calendering and laminating mechanism comprises a second transfer roller; the first lithium tape unwinding mechanism is used for conveying a first lithium tape between the first calendering roller and the second calendering roller, and the first lithium tape is calendered into a lithium foil and is adhered to the second isolating film; and the pole piece unreeling mechanism is used for conveying the pole pieces between the first transfer roller and the second transfer roller, and the lithium foil on the second isolation film is adhered to one side of the pole pieces. The pole piece lithium supplementing device is simple in structure and low in production cost.
Description
Technical Field
The utility model relates to the technical field of lithium battery manufacturing, in particular to a pole piece lithium supplementing device.
Background
The lithium ion battery has the advantages of high energy density, long cycle life, no memory effect and the like, and becomes the first choice of consumer electronic batteries and new energy automobile power batteries. Lithium loss is caused by the formation of a Solid Electrolyte Interface (SEI) film in the first charge-discharge process of the lithium ion battery electrode material, and the lithium loss limits the exertion of the energy density of the lithium ion battery; in addition, side reactions during cyclic charging and discharging also cause loss of active lithium, which leads to a shortened cycle life. In order to solve the above problem of lithium loss, a method of supplementing lithium element to the negative electrode sheet is generally adopted.
The process of pole piece lithium supplement includes calendering and film covering, namely, calendering a lithium belt with thicker thickness into a lithium foil, and then pasting the lithium foil on the pole piece, thereby realizing the lithium supplement of the pole piece. In the prior art, because the lithium foil is very thin and inconvenient to convey and attach, the lithium tape and the two isolation tapes are usually rolled together, so that the lithium foil is wrapped between the two isolation tapes, and the lithium foil is prevented from being adhered to a compression roller; and then rolling the lower isolation belt to ensure that the lithium foil is adhered to the upper isolation belt, then driving the upper isolation belt to drive the lithium foil to the pole piece, finally adhering the lithium foil on the pole piece in a rolling mode, and finally rolling and recovering the upper isolation belt from the pole piece. In this way, the length of the isolation strip is at least twice as long as that of the lithium foil, and the isolation strip needs to be respectively rolled and recycled after use, so that the structure is complex and the cost is high.
Therefore, a device for lithium supplement of a pole piece is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pole piece lithium supplementing device which is simple in structure and low in production cost.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a pole piece lithium supplementing device comprises:
the first calendering conveying mechanism comprises a first calendering roller, at least one first supporting roller and a first isolating film, wherein the first isolating film is wound on the first calendering roller and the first supporting roller, and the first calendering roller drives the first isolating film to move synchronously;
the first calendering and laminating mechanism comprises a second calendering roller, a first transfer roller and a second isolating film, wherein the second isolating film is wound on the second calendering roller and the first transfer roller, and the second calendering roller drives the second isolating film to synchronously move;
the second calendering and laminating mechanism comprises a second transfer roller;
the first lithium tape unwinding mechanism is used for conveying a first lithium tape between the first calendering roller and the second calendering roller, and the first lithium tape is calendered into a first lithium foil and is adhered to the second isolating film;
and the pole piece unreeling mechanism is used for conveying pole pieces to the space between the first transfer roller and the second transfer roller, and the first lithium foil on the second isolation film is adhered to one side of the pole piece.
Optionally, the lithium supplementing device for a pole piece further includes:
the first release agent coating mechanism is used for coating release agent on the first isolation film; and/or
And the second release agent coating mechanism is used for coating the release agent on the second isolation film.
Optionally, the surface release force of the first isolation film is smaller than the surface release force of the second isolation film.
Optionally, the lithium supplementing device for the pole piece further comprises a first cleaning mechanism, and the first cleaning mechanism is used for cleaning the surface of the second isolation film.
Optionally, the first rolling and laminating mechanism further comprises a second supporting roller, the second isolating film winds around the second supporting roller, and the first cleaning mechanism can be in contact with the second isolating film at the second supporting roller.
Optionally, the linear speed of rotation of the second calendering roller is greater than the linear speed of rotation of the first calendering roller.
Optionally, the surface of the first transfer roller is provided with striped projections.
Optionally, the diameters of the first calendering roller and the second calendering roller are the same and range from 100mm to 200 mm; and/or
The first transfer roller and the second transfer roller have the same diameter and range from 200mm to 500 mm.
Optionally, the first calendering conveying mechanism comprises two first supporting rollers, and the position of the first supporting roller relative to the first calendering roller is adjustable.
Optionally, the lithium supplementing device for the pole piece further comprises a second rolling and conveying mechanism, the second rolling and conveying mechanism comprises a third rolling roller, at least one third supporting roller and a third isolating film, the third isolating film is wound around the third rolling roller and the third supporting roller, and the third rolling roller drives the third isolating film to move synchronously;
the second calendering and laminating mechanism further comprises a fourth calendering roller and a fourth isolating film, the fourth isolating film is wound on the fourth calendering roller and the second transfer roller, and the fourth calendering roller drives the fourth isolating film to move synchronously;
and the second lithium strip unwinding mechanism is used for conveying a second lithium strip to a position between the third calendering roller and the fourth calendering roller, the second lithium strip is calendered into a second lithium foil and is adhered to the fourth isolating film, and the second lithium foil on the fourth isolating film is adhered to the other side of the pole piece.
The utility model has the beneficial effects that:
according to the pole piece lithium supplementing device, after the first calendering conveying mechanism conveys the first lithium strip to a position between the first calendering roller and the second calendering roller, the first calendering roller and the second calendering roller calender the first lithium strip into the first lithium foil, and the surface release force of the first isolating membrane is smaller than that of the second isolating membrane, so that the first lithium foil can be ensured to be pasted on the second isolating membrane; pole piece unwinding mechanism carries the pole piece to between first transfer roller and the second transfer roller, and the second barrier film takes first lithium paper tinsel to move to first transfer roller department simultaneously, and first lithium paper tinsel is located between second barrier film and the pole piece this moment, after first transfer roller and second transfer roller, because the surface of second barrier film is from the type force and is less than the surface of pole piece from the type force to make first lithium paper tinsel glue and cover on the pole piece. According to the pole piece lithium supplementing device, the first isolating membrane and the second isolating membrane can be respectively recycled for multiple times, so that the length of the first isolating membrane is not required to be consistent with that of a pole piece, the using amount of the isolating membranes can be greatly reduced, and the production cost is reduced; and the winding mechanisms do not need to be respectively configured for the first isolating film and the second isolating film, so that the pole piece lithium supplementing device is simple and compact in structure.
Drawings
Fig. 1 is a schematic structural diagram of a pole piece lithium supplement device according to an embodiment of the present invention.
In the figure:
100-a first lithium ribbon; 200-pole piece; 300-a second lithium band;
1-a first calendering conveying mechanism; 11-first calendering roll; 12-a first support roll; 13-a first barrier film;
2-a first calendering laminating mechanism; 21-a second calendering roll; 22-a first transfer roll; 23-a second barrier film; 24-a second support roller;
3-a second calendering film-coating mechanism; 31-a fourth calender roll; 32-a second transfer roll; 33-a fourth barrier film; 34-a fourth support roller;
4-a second calendering conveying mechanism; 41-third calendering roll; 42-a third support roll; 43-a third barrier film;
51-a first cleaning mechanism; 52-a second cleaning mechanism;
6-pole piece unwinding mechanism;
71-a first lithium strip unwinding mechanism; 72-a second lithium strip unwinding mechanism;
81-a first release agent coating mechanism; 82-a second release agent coating mechanism; 83-a third release agent coating mechanism; 84-fourth release agent coating mechanism.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a lithium supplementing device for a pole piece, which can be used for supplementing lithium elements to the pole piece. In the present embodiment, the pole piece is taken as a silicon-based negative pole piece for illustration, and of course, in other embodiments, the kind of the pole piece 200 is not limited.
Preferably, as shown in fig. 1, the lithium supplementing device for the pole piece includes a first rolling and conveying mechanism 1, a first rolling and laminating mechanism 2, a second rolling and laminating mechanism 3, a first lithium strip unwinding mechanism 71 and a pole piece unwinding mechanism 6, the first rolling and conveying mechanism 1 includes a first rolling roller 11, at least one first support roller 12 and a first isolation film 13, the first isolation film 13 is wound around the first rolling roller 11 and the first support roller 12, the first rolling roller 11 drives the first isolation film 13 to move synchronously, the first rolling and laminating mechanism 2 includes a second rolling roller 21, a first transfer roller 22 and a second isolation film 23, the second isolation film 23 is wound around the second rolling roller 21 and the first transfer roller 22, the second rolling roller 21 drives the second isolation film 23 to move synchronously, the second rolling and laminating mechanism 3 includes a second transfer roller 32, the first lithium strip unwinding mechanism 71 is used for conveying the first lithium strip 100 between the first rolling roller 11 and the second rolling roller 21, the pole piece unwinding mechanism 6 is used for conveying the pole piece 200 between the first transfer roller 22 and the second transfer roller 32. In the present embodiment, the phrase "the first rolling and conveying mechanism 1 conveys the first lithium strip 100 between the first reduction roll 11 and the second reduction roll 21" means that: the first lithium strip 100 is positioned between the first separation film 13 wound on the first pressing roll and the second separation film 23 wound on the second calendering roll 21; "the pole piece unwinding mechanism 6 conveys the pole piece 200 between the first transfer roller 22 and the second transfer roller 32" means that the pole piece 200 is positioned between the second separation film 23 on the first transfer roller 22 and the second transfer roller 32.
In the pole piece lithium supplementing device of the embodiment, after the first calendering conveying mechanism 1 conveys the first lithium strip 100 to a position between the first calendering roller 11 and the second calendering roller 21, the first calendering roller 11 and the second calendering roller 21 calender the first lithium strip 100 into the first lithium foil, and the surface release force of the first isolation film 13 is smaller than the surface release force of the second isolation film 23, so that the first lithium foil can be ensured to be pasted on the second isolation film 23; the pole piece unreeling mechanism 6 conveys the pole piece 200 to a position between the first transfer roller 22 and the second transfer roller 32, meanwhile, the second isolation film 23 carries the first lithium foil to move to the position of the first transfer roller 22, at the moment, the first lithium foil is positioned between the second isolation film 23 and the pole piece 200, and after passing through the first transfer roller 22 and the second transfer roller 32, the first lithium foil is adhered on the pole piece 200 due to the fact that the surface release force of the second isolation film 23 is smaller than that of the pole piece 200. In the lithium supplementing device for the pole piece of the embodiment, the first isolation film 13 and the second isolation film 23 can be respectively recycled for multiple times, so that the length is not required to be consistent with that of the pole piece 200, the usage amount of the isolation films can be greatly reduced, and the production cost is reduced; and the first isolation film 13 and the second isolation film 23 do not need to be respectively provided with a winding mechanism, so that the pole piece lithium supplementing device has a simple and compact structure.
In general, both sides of the pole piece 200 need to perform a lithium supplementing operation, preferably, as shown in fig. 1, the lithium supplementing device for the pole piece further includes a second rolling and conveying mechanism 4, the second rolling and conveying mechanism 4 includes a third rolling roller 41, at least one third supporting roller 42 and a third isolating film 43, the third isolating film 43 is wound around the third rolling roller 41 and the third supporting roller 42, the third rolling roller 41 drives the third isolating film 43 to move synchronously, the second rolling and film-covering mechanism 3 further includes a fourth rolling roller 31 and a fourth isolating film 33, the fourth isolating film 33 is wound around the fourth rolling roller 31 and the second transfer roller 32, the fourth rolling roller 31 drives the fourth isolating film 33 to move synchronously, and the second lithium tape unwinding mechanism 72 is configured to convey a second lithium tape 300 between the third rolling roller 41 and the fourth rolling roller 31. The second lithium tape 300 is rolled into a second lithium foil and is adhered to the fourth separator 33, and the second lithium foil on the fourth separator 33 is adhered to the other side of the pole piece 200.
In actual work, after the second calendaring conveying mechanism 4 conveys the second lithium tape 300 to a position between the third calendaring roller 41 and the fourth calendaring roller 31, the third calendaring roller 41 and the fourth calendaring roller 31 calendar the second lithium tape 300 into a second lithium foil, and the second lithium foil can be ensured to be pasted on the fourth isolation film 33 by making the surface release force of the third isolation film 43 smaller than the surface release force of the fourth isolation film 33; the fourth separation film 33 carries the second lithium foil to move to the second transfer roller 32, at this time, the second lithium foil is located between the fourth separation film 33 and the pole piece 200, and after passing through the first transfer roller 22 and the second transfer roller 32, since the surface release force of the fourth separation film 33 is smaller than that of the pole piece 200, the second lithium foil is adhered to the other side of the pole piece 200. Namely, the lithium foil can be synchronously pasted on two sides of the pole piece 200 by arranging the first rolling and conveying mechanism 1, the first rolling and laminating mechanism 2, the first lithium strip unwinding mechanism 71, the second rolling and conveying mechanism 4, the second rolling and laminating mechanism 3 and the second lithium strip unwinding mechanism 72, namely, the lithium supplement operation on two sides of the pole piece 200 is realized.
To achieve gap lithium replenishment, the surface of the first transfer roll 22 may be provided with striated protrusions. The lithium on the first lithium foil corresponding to the stripe protrusions on the first transfer roller 22 is pressed on the pole piece 200, and the lithium on the first lithium foil corresponding to the gap between the two stripe protrusions is left on the second isolation film 23, so that the lithium compensated on the surface of the pole piece 200 is also in a stripe shape, and in the subsequent use process, the stripe structure on the pole piece 200 can improve the wetting effect of the electrolyte on the pole piece 200. Alternatively, the stripe projection may extend in the axial direction of the first transfer roller 22, or may extend in the radial direction of the first transfer roller 22, which is not particularly limited herein.
Similarly, the surface of the second transfer roller 32 may be provided with striped projections. The lithium on the second lithium foil corresponding to the stripe protrusions on the second transfer roller 32 is pressed on the pole piece 200, and the lithium on the second lithium foil corresponding to the gap between the two stripe protrusions is left on the fourth isolation film 33, so that the lithium compensated on the surface of the pole piece 200 is also in a stripe shape, and in the subsequent use process, the stripe structure on the pole piece 200 can improve the infiltration effect of the electrolyte on the pole piece 200. Alternatively, the stripe projections may extend in the axial direction of the second transfer roller 32, or may extend in the radial direction of the second transfer roller 32, which is not particularly limited herein.
Preferably, the pole piece lithium supplementing device further comprises a first cleaning mechanism 51, and the first cleaning mechanism 51 is used for cleaning the metallic lithium residues on the surface of the second isolation film 23. Specifically, the first cleaning mechanism 51 includes a scraper capable of hanging off metallic lithium residues on the surface of the second diaphragm and a suction nozzle capable of sucking away the lithium residues, thereby ensuring the cleanliness of the surface of the second diaphragm. Preferably, the first rolling film covering mechanism 2 further comprises a second supporting roller 24, the second isolation film 23 is wound around the second supporting roller 24, and the first cleaning mechanism 51 can contact with the second isolation film 23 at the second supporting roller 24, so that the first cleaning mechanism 51 can clean the second isolation film 23 more conveniently. In this embodiment, the first reduction roll 11, the first transfer roll 22, and the second support roll 24 are axially arranged in parallel and form a triangle. Preferably, the position of the second support roller 24 with respect to the second reduction roller 21 is adjustable, so that the tension of the second separator 23 can be adjusted. The manner of adjusting the position of the second support roller 24 may be any one of the prior art without departing from the inventive concept of the present application, and is not limited herein.
Similarly, the pole piece lithium supplementing device further comprises a second cleaning mechanism 52, and the second cleaning mechanism 52 is used for cleaning the metallic lithium residues on the surface of the fourth isolation film 33. Specifically, the second cleaning mechanism 52 includes a scraper capable of hanging off metallic lithium residues on the surface of the fourth diaphragm and a suction nozzle capable of sucking away the lithium residues, thereby ensuring the cleanness of the surface of the fourth diaphragm.
Preferably, the second rolling film covering mechanism 3 further comprises a fourth supporting roller 34, the fourth isolation film 33 is wound around the fourth supporting roller 34, and the second cleaning mechanism 52 can contact with the fourth isolation film 33 at the fourth supporting roller 34, so that the second cleaning mechanism 52 can clean the fourth isolation film 33 more conveniently. In this embodiment, the fourth reduction roll 31, the second transfer roll 32, and the fourth support roll 34 are axially arranged in parallel and enclose a triangle. Preferably, the position of the fourth supporting roller 34 with respect to the fourth calender roller 31 is adjustable, so that the tension of the fourth separation film 33 can be adjusted. The manner of adjusting the position of the fourth supporting roller 34 can be any one of the prior art without departing from the inventive concept of the present application, and is not limited herein.
Preferably, as shown in fig. 1, the first calendering conveying mechanism 1 includes two first support rollers 12, and the two first support rollers 12 and the first calendering roller 11 are axially arranged in parallel and arranged in a triangular configuration. Preferably, the position of the first support roll 12 relative to the first reduction roll 11 is adjustable, so that the tension of the first separator 13 can be flexibly adjusted. The manner of adjusting the position of the first supporting roller 12 may be any one of the prior art without departing from the inventive concept of the present application, and is not limited herein.
Likewise, the second calender conveying mechanism 4 includes two third support rollers 42, and the two third support rollers 42 and the third calender roller 41 are axially disposed in parallel and arranged in a triangular configuration. Preferably, the position of the third support roller 42 with respect to the third reduction roller 41 is adjustable, so that the tension of the third separator 43 can be flexibly adjusted. The manner of adjusting the position of the third supporting roller 42 can be any one of the prior art without departing from the inventive concept of the present application, and is not limited herein.
Preferably, the first isolation film 13, the second isolation film 23, the third isolation film 43, and the fourth isolation film 33 may be made of a PET film, a PP film, a PE film, or a stainless steel foil support material with a smooth surface and a small surface release force. As long as it is ensured that the surface release force of the first isolation film 13 is smaller than the surface release force of the second isolation film 23, and the surface release force of the third isolation film 43 is smaller than the surface release force of the fourth isolation film 33. Further, the inner surfaces of the first isolation film 13, the second isolation film 23, the third isolation film 43 and the fourth isolation film 33 are subjected to rough treatment, so that the friction force between the inner surfaces of the first isolation film 13, the second isolation film 23, the third isolation film 43 and the fourth isolation film 33 and the corresponding calendering rollers is greater than the resistance of calendering and adhering lithium foil, the purpose of synchronous movement of the first isolation film 13, the second isolation film 23, the third isolation film 43 and the fourth isolation film 33 and the corresponding calendering rollers is achieved, and the problem of slippage is avoided.
Preferably, the rotational linear speed of the second calendering roll 21 is greater than that of the first calendering roll 11, that is, the two calendering rolls perform asynchronous calendering, so as to ensure that the first calendering roll 11 and the second calendering roll 21 can calender the first lithium strip 100 into a second lithium foil with a preset thickness. In this embodiment, the ratio of the linear speed of rotation of the second reduction roller 21 to the linear speed of rotation of the first reduction roller 11 is 5:2, and in other embodiments, the ratio of the linear speed of rotation of the second reduction roller 21 to the linear speed of rotation of the first reduction roller 11 may be flexibly set according to actual needs, and is not limited herein.
Similarly, the rotational linear speed of the fourth calendaring roller 31 is greater than the rotational linear speed of the third calendaring roller 41, that is, the two calendaring rollers perform asynchronous calendaring, so that the third calendaring roller 41 and the fourth calendaring roller 31 can ensure that the second lithium strip 300 can be calendered into a second lithium foil with a preset thickness. In this embodiment, the ratio of the rotational linear velocity of the fourth reduction roller 31 to the rotational linear velocity of the third reduction roller 41 is 5:2, and in other embodiments, the rotational velocity ratio of the third reduction roller 41 to the third reduction roller 41 may be flexibly set according to actual needs, and is not limited herein.
Preferably, the diameters of the first calender roll 11, the second calender roll 21, the third calender roll 41 and the fourth calender roll 31 are the same and range from 100mm to 200 mm; the first transfer roll 22 and the second transfer roll 32 have the same diameter and range from 200mm to 500 mm. Setting the diameters of the first reduction roll 11 and the second reduction roll 21 to a small value facilitates the reduction of the first lithium strip 100. Setting the diameters of the third calendar roll 41 and the fourth calendar roll 31 to a small value facilitates the rolling of the second lithium strip 300. Setting the diameters of the first transfer roller 22 and the second transfer roller 32 to large values not only facilitates separation of the first lithium foil from the second separator 23 and separation of the second lithium foil from the fourth separator 33, but also prevents the pole piece 200 from being calendered during transfer of the first lithium foil and the second lithium foil to the pole piece 200.
After the first separator 13 and the second separator 23 are used for a certain period of time, the surface release force of the separators may increase, which is not favorable for the separation of the lithium foil from the separators. Preferably, as shown in fig. 1, the lithium supplementing device for the pole piece further includes a first release agent coating mechanism 81 and a second release agent coating mechanism 82, the first release agent coating mechanism 81 is used for coating the release agent on the first isolation film 13, and the second release agent coating mechanism 82 is used for coating the release agent on the second isolation film 23. In the actual use process, the first release agent coating mechanism 81 can be used for coating the release agent on the surface of the first isolation film 13, and the second release agent coating mechanism 82 can be used for coating the release agent on the surface of the second isolation film 23, so that the surface release force of the first isolation film 13 and the surface release force of the second isolation film 23 are kept in a proper range, and the first lithium foil is ensured to be smoothly separated from the isolation films. It can be understood that the surface release force of the first release film 13 can be adjusted by adjusting the type and/or total amount of the release agent applied by the first release agent applying mechanism 81 to the first release film 13; the surface release force of the second release film 23 is adjusted by adjusting the type and/or total amount of the release agent applied to the second release film 23 by the second release agent applying mechanism 82.
Similarly, the lithium supplementing device for the pole piece further comprises a third release agent coating mechanism 83 and a fourth release agent coating mechanism 84, wherein the third release agent coating mechanism 83 is used for coating the release agent on the third isolation film 43, and the fourth release agent coating mechanism 84 is used for coating the release agent on the fourth isolation film 33. In the actual use process, the third release agent coating mechanism 83 can be used for coating the release agent on the surface of the third isolation film 43, and the fourth release agent coating mechanism 84 can be used for coating the release agent on the surface of the fourth isolation film 33, so that the surface release force of the third isolation film 43 and the surface release force of the fourth isolation film 33 are kept in a proper range, and the second lithium foil is further ensured to be smoothly separated from the isolation films. It can be understood that the surface release force of the third release film can be adjusted by adjusting the type and/or total amount of the release agent applied by the third release agent applying mechanism 83 to the third release film 43; the surface release force of the fourth release film 33 is adjusted by adjusting the type and/or total amount of the release agent applied to the fourth release film 33 by the fourth release agent application mechanism 84.
Alternatively, the first release agent coating mechanism 81, the second release agent coating mechanism 82, the third release agent coating mechanism 83, and the fourth release agent coating mechanism 84 may coat the corresponding release film by one of spraying, extrusion coating, transfer coating, and the like, which is not limited herein.
Alternatively, the release agent may be polymethylsiloxanes and polyethers. Because a small amount of release agent possibly exists between the lithium foil and the pole piece 200, the release agent is added with conductive agent, lithium salt or a mixture of the conductive agent and the lithium salt, so that the release agent has ion, electron or mixed conductivity, and the influence of the release agent on the process that lithium ions in the lithium foil diffuse to the pole piece 200 is reduced.
Of course, in other embodiments, the first release agent coating mechanism 81, the second release agent coating mechanism 82, the third release agent coating mechanism 83, and the fourth release agent coating mechanism 84 may not be provided, and the first separator 13, the second separator 23, the fourth separator 33, and the third separator 43 may be replaced periodically.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the utility model and are not to be construed as limitations of the embodiments of the present invention, but may be modified in various embodiments and applications by those skilled in the art according to the spirit of the present invention, and the content of the present description should not be construed as a limitation of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a lithium device is mended to pole piece which characterized in that includes:
the first calendering conveying mechanism (1) comprises a first calendering roller (11), at least one first supporting roller (12) and a first isolating film (13), the first isolating film (13) is wound on the first calendering roller (11) and the first supporting roller (12), and the first calendering roller (11) drives the first isolating film (13) to move synchronously;
the first rolling film laminating mechanism (2) comprises a second rolling roller (21), a first transfer roller (22) and a second isolating film (23), the second isolating film (23) is wound on the second rolling roller (21) and the first transfer roller (22), and the second rolling roller (21) drives the second isolating film (23) to move synchronously;
the second rolling film covering mechanism (3) comprises a second transfer roller (32);
the first lithium strip unwinding mechanism (71) is used for conveying a first lithium strip (100) between the first calendering roller (11) and the second calendering roller (21), and the first lithium strip (100) is calendered into a first lithium foil and is adhered to the second separation film (23);
and the pole piece unreeling mechanism (6) is used for conveying a pole piece (200) between the first transfer roller (22) and the second transfer roller (32), and the first lithium foil on the second isolation film (23) is adhered to one side of the pole piece (200).
2. The pole piece lithium replenishment device of claim 1, further comprising:
a first release agent coating mechanism (81) for coating a release agent on the first release film (13); and/or
And the second release agent coating mechanism (82) is used for coating the release agent on the second isolation film (23).
3. The pole piece lithium supplementing device according to claim 1, wherein a surface release force of the first isolation film (13) is smaller than a surface release force of the second isolation film (23).
4. The pole piece lithium supplement device according to claim 1, further comprising a first cleaning mechanism (51), wherein the first cleaning mechanism (51) is used for cleaning the surface of the second isolation film (23).
5. The pole piece lithium supplementing device according to claim 4, wherein the first rolling film covering mechanism (2) further comprises a second supporting roller (24), the second isolation film (23) is wound around the second supporting roller (24), and the first cleaning mechanism (51) can be in contact with the second isolation film (23) at the second supporting roller (24).
6. The pole piece lithium supplementing device according to claim 1, wherein the linear speed of rotation of the second reduction roll (21) is greater than the linear speed of rotation of the first reduction roll (11).
7. The pole piece lithium supplementing device according to claim 1, wherein the surface of the first transfer roller (22) is provided with striped protrusions.
8. The pole piece lithium supplementing device according to claim 1, wherein the first calendering roll (11) and the second calendering roll (21) have the same diameter and range from 100mm to 200 mm; and/or
The first transfer roll (22) and the second transfer roll (32) have the same diameter and range from 200mm to 500 mm.
9. The pole piece lithium supplementing device according to claim 1, wherein the first rolling and conveying mechanism (1) comprises two first supporting rollers (12), and the position of the first supporting rollers (12) relative to the first rolling rollers (11) is adjustable.
10. The pole piece lithium supplementing device according to any one of claims 1 to 9, further comprising a second rolling and conveying mechanism (4), wherein the second rolling and conveying mechanism (4) comprises a third rolling roller (41), at least one third supporting roller (42) and a third isolating film (43), the third isolating film (43) is wound around the third rolling roller (41) and the third supporting roller (42), and the third rolling roller (41) drives the third isolating film (43) to move synchronously;
the second rolling film laminating mechanism (3) further comprises a fourth rolling roller (31) and a fourth isolating film (33), the fourth isolating film (33) is wound on the fourth rolling roller (31) and the second transfer roller (32), and the fourth rolling roller (31) drives the fourth isolating film (33) to move synchronously;
and the second lithium tape unwinding mechanism (72) is used for conveying a second lithium tape (300) between the third calendering roller (41) and the fourth calendering roller (31), the second lithium tape (300) is calendered into a second lithium foil and is adhered to and covered on the fourth isolating film (33), and the second lithium foil is adhered to and covered on the other side of the pole piece (200) on the fourth isolating film (33).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122146450.XU CN215527759U (en) | 2021-09-07 | 2021-09-07 | Lithium device is mended to pole piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122146450.XU CN215527759U (en) | 2021-09-07 | 2021-09-07 | Lithium device is mended to pole piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115566147A (en) * | 2022-09-30 | 2023-01-03 | 广东捷盟智能装备有限公司 | Copper film double-sided lithium coating device and copper film double-sided lithium coating method |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115566147A (en) * | 2022-09-30 | 2023-01-03 | 广东捷盟智能装备有限公司 | Copper film double-sided lithium coating device and copper film double-sided lithium coating method |
| CN115566147B (en) * | 2022-09-30 | 2023-06-06 | 广东捷盟智能装备有限公司 | Copper film double-sided lithium coating device and copper film double-sided lithium coating method |
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