CN212277234U - Integrated pole piece lithium supplementing system - Google Patents
Integrated pole piece lithium supplementing system Download PDFInfo
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- CN212277234U CN212277234U CN202021399516.5U CN202021399516U CN212277234U CN 212277234 U CN212277234 U CN 212277234U CN 202021399516 U CN202021399516 U CN 202021399516U CN 212277234 U CN212277234 U CN 212277234U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The embodiment of the utility model provides an integrated pole piece lithium supplementing system, which relates to the technical field of batteries and comprises a pole piece unreeling mechanism, a lithium foil preparation device, a pole piece compound device, a pole piece lithium embedding heating device and a pole piece reeling mechanism, wherein the pole piece unreeling mechanism is arranged at the material inlet end of the pole piece compound device, the lithium foil preparation device is arranged at the material inlet end of the pole piece compound device, the pole piece lithium embedding heating device is arranged at the material outlet end of the pole piece compound device and is used for heating lithium foil and pole pieces so as to lead the lithium foil to be embedded into the pole pieces, and the pole piece reeling mechanism is arranged at the material outlet end of the pole piece lithium embedding device, compared with the prior art, the integrated pole piece lithium supplementing system provided by the utility model can ensure that the rolled pole piece lithium belts on two sides are rolled uniformly and have consistent thickness, meanwhile, the lithium belts are tightly combined with the pole pieces, are not easy, and the lithium foil preparation device is arranged on the production line in an integrated mode, so that the additional lithium belt is avoided.
Description
Technical Field
The utility model relates to a battery technology field particularly, relates to an integrated form pole piece mends lithium system.
Background
The market has urgent needs for the research and development of processes and equipment for greatly improving the energy density of batteries. In addition to the active development of the technical route of the solid-state battery, the discussion of the technical route of the negative electrode lithium supplement and the development of the negative electrode lithium supplement device are ideal choices in the development process of the lithium battery industry. The composite calendering of the lithium belt and the pole piece is one of the technical forms of the lithium supplement of the negative pole.
Through utility model people's research discovery, lithium area and pole piece (or metal forming) roll-in-process, hardly guarantee the two side lithium area roll-ins of pole piece after the roll-in compactness even, that thickness is unanimous and lithium area and pole piece combine, compound pole piece after the finished product has the risk of lithium area and pole piece separation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an integrated form pole piece mends lithium system, it can guarantee that the roll-in of the two side lithium strips of pole piece after the roll-in is even, thickness is unanimous, combines closely between lithium strip and the pole piece simultaneously, and difficult separation guarantees the stability of pole piece in the subsequent handling.
The embodiment of the utility model discloses a can realize like this:
in a first aspect, an embodiment of the present invention provides an integrated lithium supplementing system for a pole piece, comprising a pole piece unreeling mechanism, a lithium foil preparing device, a pole piece combining device, a lithium-embedded pole piece heating device and a pole piece reeling mechanism, which are integrally arranged on a same production line, wherein the pole piece unreeling mechanism is arranged at a material inlet end of the pole piece combining device for conveying the pole piece to the pole piece combining device, the lithium foil preparing device is arranged at a material inlet end of the pole piece combining device for surface-mounting the lithium foil on a protective film entering the pole piece combining device or surface-mounting the lithium foil on the pole piece entering the pole piece combining device, the pole piece combining device is used for laminating the lithium foil and the pole piece, the lithium-embedded pole piece heating device is arranged at a material outlet end of the pole piece combining device for heating the lithium foil and the pole piece to enable the lithium foil to be embedded into the pole piece, the pole piece winding mechanism is arranged at the discharge end of the pole piece lithium embedding device and used for winding the composite pole piece formed after lithium embedding.
In an optional embodiment, the lithium-embedded pole piece heating device is provided with a heating channel, and a heating element is arranged in the heating channel and used for heating the heating channel to 45 ℃ to 100 ℃.
In an optional implementation mode, the integrated pole piece lithium supplementing system further comprises a protective film unwinding mechanism and a protective film winding mechanism, the protective film unwinding mechanism is arranged at a feeding end of the lithium foil preparation device and used for providing a protective film wound on the lithium foil preparation device, the protective film winding mechanism is arranged at a discharging end of the pole piece compounding device and used for winding the protective film, the lithium foil preparation device is further used for forming a lithium foil on the surface of the protective film, and the protective film with the lithium foil is attached to the surface of the pole piece, so that the lithium foil is attached to the surface of the pole piece.
In an optional embodiment, the lithium foil preparation apparatus includes a molten lithium mechanism, a slit-type casting die head and a casting cooling roller, the casting cooling roller is disposed between the protective film unwinding mechanism and the pole piece combining device, the protective film is wound on the casting cooling roller in a rolling manner, the molten lithium mechanism is disposed above the casting cooling roller and is used for melting a lithium ingot and forming molten lithium, and the slit-type casting die head is disposed below the molten lithium mechanism and corresponds to the casting cooling roller and is used for guiding the molten lithium to the surface of the protective film and forming the lithium foil.
In an alternative embodiment, the inside of the casting chill roll is provided with a cooling ring cavity filled with a cooling liquid.
In an optional embodiment, the lithium melting mechanism is provided with a lithium ingot placing port, a vacuum protection box is arranged on the lithium ingot placing port in a sealing cover manner, and protective gas is filled in the vacuum protection box.
In an optional embodiment, the lithium foil preparation device further comprises a lithium foil roll pair mechanism, and the lithium foil roll pair mechanism is arranged between the casting cooling roll and the pole piece compounding device and is used for rolling the protective film with the lithium foil according to a set thickness.
In an optional embodiment, the pole piece compounding device comprises a superposition and roll-to-roll mechanism, a composite roll-to-roll mechanism and a conveying roll-to-roll mechanism, wherein the composite roll-to-roll mechanism is arranged between the superposition and roll-to-roll mechanism and used for laminating the protective film coated with the lithium foil and the pole piece, the superposition and roll-to-roll mechanism is used for receiving the pole piece and the protective film and conveying the pole piece and the protective film coated with the lithium foil to the composite roll-to-roll mechanism in a superposition manner, and the conveying roll-to-roll mechanism is used for conveying the laminated protective film and the pole piece and conveying the pole piece with the lithium foil to the pole piece lithium-embedded heating device.
In an optional embodiment, the number of the lithium foil preparation devices is two, and the two lithium foil preparation devices are respectively arranged on the upper side and the lower side of the pole piece unreeling device and used for mounting the lithium foil on the protection film or the pole piece.
In an optional embodiment, the integrated pole piece lithium supplement system further comprises a pole piece leveling and roll-up mechanism, wherein the pole piece leveling and roll-up mechanism is arranged between the pole piece winding mechanism and the pole piece lithium embedding heating device and is used for leveling the heated pole piece.
The utility model discloses beneficial effect includes, for example:
the utility model provides an integrated form pole piece mends lithium system, discharge end through at pole piece set composite set sets up the pole piece and inlays lithium heating device, the realization is to the heating of pole piece and lithium paper tinsel, under the heating condition, the lithium paper tinsel can progressively be embedded into the pole piece, traditional lithium area roll-in mends lithium technology has greatly been improved, compound pole piece thickness local over-thickness problem and lithium area have been overcome and the inseparable problem of pole piece combination is not combined, and simultaneously, the lithium paper tinsel is embedded into the pole piece, also improve to some extent to the stability of compound pole piece in electric core production process, it is lower to electric core manufacturing process and electric core production facility requirement update degree. Compared with the prior art, the utility model provides an integrated form pole piece mends lithium system can guarantee that the roll-in of the two side lithium strips of pole piece after the roll-in is even, thickness is unanimous, combines closely between lithium strip and the pole piece simultaneously, and difficult separation guarantees the stability of pole piece in the follow-up process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an integrated pole piece lithium supplement system provided by the present invention;
FIG. 2 is a schematic view of a composite structure of a pole piece and a lithium foil passing through a pole piece composite device;
FIG. 3 is a schematic structural view of the lithium foil manufacturing apparatus of FIG. 1;
fig. 4 is a schematic structural diagram of the pole piece composite device in fig. 1.
Icon: 100-integrated pole piece lithium supplement system; 110-pole piece unwinding mechanism; 130-lithium foil preparation device; 131-a molten lithium mechanism; 133-slot casting die; 135-casting chill roll; 137-lithium foil roll-to-roll mechanism; 140-pole piece leveling roll aligning mechanism; 150-pole piece compounding device; 151-overlapping roll-aligning mechanism; 153-composite roll-pair mechanism; 155-conveying roller pair mechanism; 160-pole piece lithium embedding heating device; 170-pole piece winding mechanism; 180-protective film unwinding mechanism; 190-a protective film winding mechanism; 200-pole piece; 210-copper foil; 230-coating; 250-lithium foil; 300-protective film.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background art, the negative electrode lithium supplement techniques adopted in the prior art all implement lithium supplement operation of the pole piece 200 in a rolling manner, i.e. the lithium belt and the pole piece 200 are rolled and compounded, so that the lithium belt and the pole piece 200 are combined into a whole, but in this lithium supplement form, the combination degree between the lithium belt and the pole piece 200 is low, the appearance of subsequent falling of the lithium belt is easily caused, and the tightness of the combination of the lithium belt and the pole piece is difficult to ensure.
In addition, the lithium tapes required by the rolling compounding in the prior art are independently supplied lithium tape products, the width and thickness of the lithium tape products are few in selectable models, and the lithium tape products are greatly not matched with the specifications and the styles of batteries. And because the lithium belt is independently provided, the thickness of the lithium belt is more than 50 microns, and the thickness is overlarge, which seriously exceeds the process requirements of the composite rolling of the pole piece 200 and the composite rolling of the metal foil on the thickness of the lithium belt, thereby causing great waste of lithium resources. And because the lithium belt is soft in texture, the phenomena of fracture and wrinkle are easy to occur in the belt moving process, so that the independent supply of the lithium belt has certain risks.
The embodiment of the utility model provides a through setting up lithium paper tinsel preparation facilities 130, direct form or dress lithium paper tinsel 250 on pole piece 200 surface, the independent supply lithium area has been avoided, inlay lithium heating device 160 through setting up the pole piece simultaneously, realize the heating to pole piece 200 and lithium paper tinsel 250, under the heating condition, lithium paper tinsel 250 can progressively be embedded into pole piece 200, traditional lithium tape roll-in mends lithium technology has greatly been improved, compound pole piece 200 thickness local too thick problem and lithium area combine inseparable problem with pole piece 200 have been overcome, and simultaneously, lithium paper tinsel 250 is embedded into pole piece 200, also improve to the stability of compound pole piece 200 in electric core production process, it is lower to require the renewal degree to electric core manufacturing process and electric core production facility. And, the utility model discloses can control lithium paper tinsel 250 thickness and width for it can avoid the waste of lithium resource with electromagnetism specification pattern phase-match.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1 and fig. 2, the present embodiment provides an integrated pole piece lithium replenishing system 100, which can ensure that the rolled lithium strips on both sides of the rolled pole piece are rolled uniformly and have consistent thickness, and meanwhile, the lithium strips and the pole piece are tightly bonded and are not easily separated, thereby ensuring the stability of the pole piece 200 in the subsequent process. Meanwhile, the lithium foil 250 can be manufactured on site, a series of problems caused by independent supply of lithium tapes are avoided, the thickness and the width of the lithium foil 250 are controllable, the applicability of the lithium foil is improved, and waste of lithium resources is avoided.
The integrated pole piece lithium supplementing system 100 provided by this embodiment includes a pole piece unreeling mechanism 110, a lithium foil preparation device 130, a pole piece compounding device 150, a pole piece lithium embedding heating device 160 and a pole piece reeling mechanism 170, where the pole piece unreeling mechanism 110 is disposed at a feeding end of the pole piece compounding device 150 and is used for conveying the pole piece 200 to the pole piece compounding device 150, the lithium foil preparation device 130 is disposed at the feeding end of the pole piece compounding device 150 and is used for forming or pasting the lithium foil 250 on the surface of the pole piece 200 entering the pole piece compounding device 150, the pole piece compounding device 150 is used for laminating the lithium foil 250 and the pole piece 200, the pole piece lithium embedding heating device 160 is disposed at a discharging end of the pole piece compounding device 150 and is used for heating the lithium foil 250 and the pole piece 200 so as to embed the lithium foil 250 into the pole piece 200, and the pole piece reeling mechanism 170 is disposed at a discharging end of the pole.
In this embodiment, the entire integrated pole piece lithium replenishing system 100 is disposed on a mounting plate, the pole piece unwinding mechanism 110 is disposed at the front end, the pole piece winding mechanism 170 is disposed at the rear end, the feeding end mentioned in this embodiment refers to one side for receiving materials, the discharging end refers to one side for outputting materials, and the feeding end and the discharging end may be on the same straight line or in the direction perpendicular to each other.
In this embodiment, there are two lithium foil preparing devices 130, and the two lithium foil preparing devices 130 are respectively disposed on the upper and lower sides of the unwinding device of the pole piece 200, and are used for forming or attaching the lithium foil 250 on the upper and lower sides of the protection film.
In the present embodiment, lithium foil preparing apparatus 130 is used for attaching lithium foil 250 to the surface of pole piece 200, specifically, lithium foil 250 is attached to the surface of pole piece 200 and fed into pole piece combining apparatus 150. Wherein mounting means that lithium foil 250 has a surface close to pole piece 200 and finally falls on pole piece 200, and the process can be realized by the orientation of pole piece 200 or lithium foil 250, which is not specifically described herein.
In this embodiment, the lithium-embedded pole piece heating device 160 has a heating channel, and a heating element is disposed in the heating channel for heating the heating channel to 45 ℃ to 100 ℃, preferably 80 ℃. Specifically, the heating member can be a resistance wire for heating, and can also be an infrared heater for heating, and the width of the heating channel can be set according to the actual lithium intercalation condition so as to ensure the lithium intercalation effect.
When passing through the pole piece assembly 150, the protective film 300, the lithium foil 250 and the pole piece 200 are pressed together, in this embodiment, the pole piece 200 includes a copper foil 210 and a coating 230, the lithium foil 250 is pressed on the outer side of the coating 230, and the protective film 300 is located on the outermost side and separated from the lithium foil 250 after passing through the pole piece assembly 150.
In this embodiment, the coating 230 is disposed on both sides of the copper foil 210, and after the thermal compounding by the pole piece compounding device 150, the lithium foil 250 can be embedded into the coating 230.
It should be noted that, in this embodiment, the coating 230 is disposed on the two side surfaces of the copper foil 210, after passing through the pole piece composite apparatus 150, the lithium foil 250 is attached to the surface of the coating 230, and in a specific temperature range, the lithium foil 250 can be embedded into the coating 230, so as to greatly improve the binding force between the lithium foil 250 and the coating 230, that is, the binding force between the pole piece 200 and the lithium foil 250 is improved.
Further, the integrated pole piece lithium supplementing system 100 further includes a protection film unwinding mechanism 180 and a protection film winding mechanism 190, the protection film unwinding mechanism 180 is disposed at a feeding end of the lithium foil preparation device 130 and is used for providing the protection film 300 wound on the lithium foil preparation device 130, the protection film winding mechanism 190 is disposed at a discharging end of the pole piece compounding device 150 and is used for winding the protection film 300, the lithium foil preparation device 130 is further used for forming the lithium foil 250 on the surface of the protection film 300, and the protection film 300 with the lithium foil 250 is attached to the surface of the pole piece 200, so that the lithium foil 250 is attached to the surface of the pole piece 200. Specifically, the number of the protection film unwinding mechanisms 180 and the number of the protection film winding mechanisms 190 are two, the two protection film unwinding mechanisms 180 are arranged up and down and respectively correspond to the two lithium foil preparation devices 130, and the two protection film winding mechanisms 190 are arranged up and down and respectively correspond to the upper side and the lower side of the pole piece combining device 150.
In other preferred embodiments of the present invention, the lithium foil 250 can be directly formed or attached on the surface of the pole piece 200 by the lithium foil preparing device 130, and then pressed by the pole piece combining device 150. It can save protection film 300, and then has saved protection film unwinding mechanism 180 and protection film winding mechanism 190.
It should be noted that in this embodiment, the protective film 300 serves as a supporting structure of the lithium foil 250, and is used for supporting the formed lithium foil 250, conveying the lithium foil 250 to the surface of the pole piece 200, and separating from the lithium foil 250 after passing through the pole piece composite device 150, so that the lithium foil 250 is supported on the surface of the pole piece 200, which facilitates a subsequent lithium embedding process.
In this embodiment, the protective film rolling mechanism 190 is disposed on the upper and lower sides of the rear end of the pole piece assembly device 150, and the protective films 300 on the two sides of the pole piece 200 can be separated from the lithium foil 250 in an oblique direction, so that the lithium foil 250 can be supported on the upper and lower surfaces of the pole piece 200.
Further, the integrated pole piece lithium supplement system 100 further includes a pole piece leveling roller mechanism 140, and the pole piece leveling roller mechanism 140 is disposed between the pole piece rolling mechanism 170 and the pole piece lithium embedding heating device 160 for leveling the heated pole piece 200. Specifically, pole piece flattening pair roller mechanism 140 sets up the discharge side at pole piece embedded lithium heating device 160 to can carry out the flattening to the compound pole piece 200 after embedding lithium of heating, further guarantee the homogeneity that lithium paper tinsel 250 distributes.
Referring to fig. 3, each lithium foil preparing apparatus 130 includes a molten lithium mechanism 131, a slit-type casting die 133, a casting cooling roller 135, and a lithium foil roll-to-roll mechanism 137, the casting cooling roller 135 is disposed between the protective film unwinding mechanism 180 and the pole piece laminating device 150, the protective film 300 is wound on the casting cooling roller 135 in a rolling manner, the molten lithium mechanism 131 is disposed above the casting cooling roller 135 for melting a lithium ingot and forming molten lithium, and the slit-type casting die 133 is disposed below the molten lithium mechanism 131 and corresponds to the casting cooling roller 135 for guiding the molten lithium to the surface of the protective film 300 and forming the lithium foil 250. The lithium foil roll pair mechanism 137 is arranged between the casting cooling roll 135 and the pole piece compounding device 150, and is used for rolling the protective film 300 with the lithium foil 250 according to the set thickness.
In this embodiment, the lithium melting mechanism 131 is used for melting a lithium ingot, and specifically, the process of melting lithium by the lithium melting mechanism 131 can be realized in three ways, the first way is that a lithium extruder heats the lithium ingot in a sectional manner to convert the lithium into a lithium molten state in a solid state, and the lithium extruder generates pressure to push the lithium molten state to flow out of a die orifice of the slit casting die 133; the second is a heating vessel device, which pushes the lithium melt out of the die orifice of the slit-type casting die 133 by a heating device and a pressurizing device provided in the heating vessel device; third, a heating device provided in the heater tray device, the lithium melt flows into the slit casting die 133, and the lithium melt is pushed out of the die opening of the slit casting die 133 by a pressurizing device provided in the slit casting die 133. Of course, there are many methods and processes for melting lithium ingots, but all processes capable of processing solid lithium ingots into molten lithium are within the scope of the present invention.
In this embodiment, the melting temperature of the molten lithium mechanism 131 is in a range of 200 ℃ to 800 ℃. After being melted by the melting lithium mechanism 131, the lithium ingot is extruded from the slit type casting die head 133 through a die orifice, is cast on the surface of the protective film 300 wound around the casting cooling roller 135, is rapidly cooled into a lithium foil 250, and is prepared into the ultrathin lithium foil 250 meeting the design requirement through the lithium foil roller mechanism 137. Compared with the traditional scheme that the lithium belt is separately provided, the lithium belt lithium supplementing method only needs to provide the lithium ingot, so that the technical problem of lithium supplementing of the lithium belt is solved, and the manufacturing cost is reduced. Meanwhile, the device has another process advantage that the prepared ultrathin lithium foil 250 is directly compounded and rolled onto the pole piece 200 through a short tape running distance without long-distance tape running or winding into a coil, so that the surface oxidation of the lithium tape and the pinch-off and fracture of the lithium foil 250 in the tape running process in the traditional scheme are avoided.
In the present embodiment, the inside of the casting cooling roller 135 is provided with a cooling ring cavity filled with a cooling liquid. Specifically, the cooling ring cavity is sealed and arranged, the cooling liquid, such as cooling water, is filled in the cooling ring cavity, and the cooling ring cavity is arranged, so that the protective film 300 wound on the surface of the casting cooling roller 135 can be rapidly cooled, and then the molten lithium guided to the surface of the protective film 300 can be rapidly cooled and cooled.
In the preferred embodiment of the present invention, one side of the casting cooling roller 135 is further provided with a positive and negative air knife auxiliary device, which can rapidly cool the molten lithium flowing out of the slit casting die 133 by blowing the cooling air, so as to rapidly form the ultra-thin lithium foil 250 on the surface of the protective film 300.
In this embodiment, the slit casting die 133 has an adjustable die opening, and the width of the die opening is adjustable, so that lithium foils 250 with different widths can be formed to adapt to pole pieces 200 with different sizes. Meanwhile, the running speed of the protective film 300 can be adjusted by a central control system, so that the thicknesses of the lithium foils 250 formed on the protective film 300 are different, or the thickness of the lithium foils 250 can be adaptively adjusted by adjusting the outflow speed of the molten lithium. Specifically, in the embodiment, the thickness of the lithium foil 250 is controlled to be 5 to 30 micrometers, and the width of the lithium foil 250 can be realized by adjusting the width of the die opening, i.e., the preparation process of the ultrathin lithium foil 250 provided in the embodiment can meet the design requirements of lithium supplement amount of different lithium batteries.
In an alternative embodiment, the lithium melting mechanism 131 has a lithium ingot placing opening, and a vacuum protection box is arranged on the lithium ingot placing opening in a sealing cover manner, and is filled with a protective gas. Specifically, the protective gas is nitrogen, and the vacuum protective box is arranged, so that the molten lithium can be prevented from contacting with air to cause oxidation of the molten lithium.
In this embodiment, the roll pressure and the roll gap of the lithium foil roll-pair mechanism 137 can be adjusted by driving with a servo motor, and specifically, the lithium foil roll-pair mechanism 137 includes a roll-pair frame, a drive roll adjustably disposed on the roll-pair frame, and a driven roll rotatably disposed on the roll-pair frame and in gap fit with the drive roll, the drive roll can adjust the gap between the drive roll and the driven roll by a servo motor, and the roll pressure of the drive roll can be adaptively adjusted by adjusting the gap. By providing the lithium foil double roll mechanism 137, the thickness of the lithium foil 250 can be rolled to a preset thickness and the rolling is uniform, so that the lithium foil 250 is uniformly spread and laid on the protective film 300.
Referring to fig. 4, the pole piece combining device 150 includes a stacking and rolling mechanism 151, a combining and rolling mechanism 153, and a conveying and rolling mechanism 155, the combining and rolling mechanism 153 is disposed between the stacking and rolling mechanism 151 and the conveying and rolling mechanism 155 and is used for laminating the protective film 300 coated with the lithium foil and the pole piece 200, the stacking and rolling mechanism 151 is used for receiving the pole piece 200 and the protective film 300 and conveying the pole piece 200 and the protective film 300 to the combining and rolling mechanism 153 in a stacking manner, and the conveying and rolling mechanism 155 is used for conveying the laminated protective film 300 and the pole piece 200 and conveying the pole piece 200 with the lithium foil 250 to the pole piece embedded lithium heating device 160.
It should be noted that, in other preferred embodiments, the positions of the pole piece combining device 150 and the pole piece lithium embedding heating device 160 can be switched, that is, the heating and lithium embedding processes are performed first, and then the lamination is performed.
In this embodiment, the stacking and roll-aligning mechanism 151 is to stack three layers of the ultra-thin lithium foil 250 with the protective film 300 on both sides of the pole piece 200 and the pole piece 200, the composite roll-aligning mechanism 153 is to perform roll-aligning and compounding on the laminated sheet body that has been stacked and compounded with parameters such as preset pressure and preset thickness, and the rolled composite pole piece 200 is in a tight adhesion state of the ultra-thin lithium foil 250 on both sides and the pole piece 200. Because the preparation process of the double-side ultrathin lithium foil 250 is the same, the lithium foil 250 covered on the two sides of the rolled pole piece 200 is uniform and consistent. The roll pressure and the gap of the composite roll-pair mechanism 153 are driven by servo motors, which are not described in detail herein.
In summary, the working principle of the integrated pole piece lithium supplement system 100 provided by the present embodiment is as follows: firstly, lithium is transformed from solid state to molten state by a lithium melting mechanism 131, the molten lithium flows out of a die orifice of a slit casting die head 133 under extrusion of a certain pressure, the molten lithium is cast to the upper surface of a protective film 300 which is wound by casting cooling, and the temperature is rapidly reduced to form an ultrathin lithium foil 250. And secondly, the pole piece 200 and the ultrathin lithium foil 250 prepared on both sides are synchronously carried to the composite roll-aligning mechanism 153 after being overlapped with the roll-aligning mechanism 151, rolled and flattened by the composite roll-aligning mechanism 153, conveyed to the pole piece lithium-embedded heating device 160 through the conveying roll-aligning mechanism 155, and the protective film 300 is wound. And thirdly, the composite pole piece 200 is carried to the pole piece lithium embedding heating device 160 for heating, so that the lithium foil 250 is embedded into the pole piece 200. And finally, the composite pole piece 200 is flattened by a flattening counter-tracking mechanism after the lithium foil 250 is embedded, and the equipment finishes the rolling process of the composite pole piece 200.
The integrated pole piece lithium supplementing system 100 provided by the embodiment can ensure that the rolled lithium strips on the two sides of the rolled pole piece are rolled uniformly and have consistent thickness by arranging the lithium foil preparation device 130 and the pole piece lithium embedding heating device 160, and meanwhile, the lithium strips are tightly combined with the pole piece and are not easy to separate, so that the stability of the pole piece 200 in the subsequent process is ensured. Meanwhile, the lithium foil 250 can be manufactured on site, a series of problems caused by independent supply of lithium tapes are avoided, the thickness and the width of the lithium foil 250 are controllable, the applicability of the lithium foil is improved, and waste of lithium resources is avoided.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An integrated pole piece lithium supplementing system is characterized by comprising a pole piece unreeling mechanism, a lithium foil preparation device, a pole piece compounding device, a pole piece lithium embedding heating device and a pole piece reeling mechanism which are integrally arranged on the same production line, wherein the pole piece unreeling mechanism is arranged at a material inlet end of the pole piece compounding device and is used for conveying pole pieces to the pole piece compounding device, the lithium foil preparation device is arranged at a material inlet end of the pole piece compounding device and is used for pasting lithium foils on the surface of a protective film entering the pole piece compounding device or pasting lithium foils on the surface of the pole pieces entering the pole piece compounding device, the pole piece compounding device is used for laminating the lithium foils and the pole pieces, the pole piece lithium embedding heating device is arranged at a material outlet end of the pole piece compounding device and is used for heating the lithium foils and the pole pieces so that the lithium foils are embedded into the pole pieces, the pole piece winding mechanism is arranged at the discharge end of the pole piece lithium embedding device and used for winding the composite pole piece formed after lithium embedding.
2. The integrated pole piece lithium supplement system of claim 1, wherein the pole piece lithium supplement heating device is provided with a heating channel, a heating element is arranged in the heating channel, and the heating element is used for heating the heating channel to 45 ℃ to 100 ℃.
3. The integrated pole piece lithium supplementation system according to claim 1, further comprising a protection film unwinding mechanism and a protection film winding mechanism, wherein the protection film unwinding mechanism is arranged at a feeding end of the lithium foil preparation device and is used for providing a protection film wound on the lithium foil preparation device, the protection film winding mechanism is arranged at a discharging end of the pole piece compounding device and is used for winding the protection film, and the lithium foil preparation device is further used for forming a lithium foil on the surface of the protection film and attaching the protection film with the lithium foil to the surface of the pole piece, so that the lithium foil is attached to the surface of the pole piece.
4. The integrated pole piece lithium supplementing system according to claim 3, wherein the lithium foil preparing device comprises a molten lithium mechanism, a slit type casting die head and a casting cooling roller, the casting cooling roller is arranged between the protective film unreeling mechanism and the pole piece compounding device, the protective film is wound on the casting cooling roller in a rolling manner, the molten lithium mechanism is arranged above the casting cooling roller and used for melting a lithium ingot and forming molten lithium, and the slit type casting die head is arranged below the molten lithium mechanism and corresponds to the casting cooling roller and used for guiding the molten lithium to the surface of the protective film and cooling the lithium foil.
5. The integrated pole piece lithium supplement system according to claim 4, wherein a cooling ring cavity is arranged inside the casting cooling roller, and a cooling liquid is filled in the cooling ring cavity.
6. The integrated pole piece lithium supplementing system according to claim 4, wherein the lithium melting mechanism is provided with a lithium ingot placing opening, a vacuum protection box is arranged on the lithium ingot placing opening in a sealing cover mode, and protective gas is filled in the vacuum protection box.
7. The integrated pole piece lithium supplementing system according to claim 4, wherein the lithium foil preparing device further comprises a lithium foil roll-to-roll mechanism, the lithium foil roll-to-roll mechanism is arranged between the casting cooling roll and the pole piece compounding device, and is used for rolling the protective film with the lithium foil according to a set thickness.
8. The integrated pole piece lithium supplementing system according to claim 3, wherein the pole piece combining device comprises a superposition roller mechanism, a composite roller mechanism and a conveying roller mechanism, the composite roller mechanism is arranged between the superposition roller mechanism and the conveying roller mechanism and is used for laminating the protective film coated with lithium foil and the pole piece, the superposition roller mechanism is used for receiving the pole piece and the protective film and conveying the pole piece and the protective film coated with lithium foil to the composite roller mechanism in a superposition manner, and the conveying roller mechanism is used for conveying the laminated protective film and the pole piece and conveying the pole piece with the lithium foil to the pole piece lithium embedding heating device.
9. The integrated pole piece lithium supplementing system according to any one of claims 1 to 8, wherein there are two lithium foil preparing devices, and the two lithium foil preparing devices are respectively disposed on the upper and lower sides of the pole piece unwinding device and are used for mounting the lithium foil on the protective film or the pole piece.
10. The integrated pole piece lithium supplement system according to any one of claims 1 to 8, further comprising a pole piece leveling roller mechanism disposed between the pole piece rolling mechanism and the pole piece lithium embedding heating device for leveling the heated pole piece.
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|---|---|---|---|
| CN202021399516.5U CN212277234U (en) | 2020-07-15 | 2020-07-15 | Integrated pole piece lithium supplementing system |
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| CN202021399516.5U CN212277234U (en) | 2020-07-15 | 2020-07-15 | Integrated pole piece lithium supplementing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883737A (en) * | 2020-07-15 | 2020-11-03 | 溧阳聚阳智能科技有限公司 | Integrated pole piece lithium supplementing system |
| CN115923205A (en) * | 2023-02-20 | 2023-04-07 | 四川省众望科希盟科技有限公司 | Method and system for laminating multilayer films for sealing aerospace flap structure |
-
2020
- 2020-07-15 CN CN202021399516.5U patent/CN212277234U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883737A (en) * | 2020-07-15 | 2020-11-03 | 溧阳聚阳智能科技有限公司 | Integrated pole piece lithium supplementing system |
| CN115923205A (en) * | 2023-02-20 | 2023-04-07 | 四川省众望科希盟科技有限公司 | Method and system for laminating multilayer films for sealing aerospace flap structure |
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