CN114023918A - Dry method electrode film preparation device and battery production line - Google Patents
Dry method electrode film preparation device and battery production line Download PDFInfo
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- CN114023918A CN114023918A CN202111130211.3A CN202111130211A CN114023918A CN 114023918 A CN114023918 A CN 114023918A CN 202111130211 A CN202111130211 A CN 202111130211A CN 114023918 A CN114023918 A CN 114023918A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0433—Molding
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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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
Abstract
The invention provides a dry method electrode film preparation device and a battery production line, comprising the following steps: the extrusion preforming mechanism comprises an extrusion cavity and a screw device arranged in the extrusion cavity, a feed inlet is formed in the first end of the extrusion cavity, a discharge outlet is formed in the second end of the extrusion cavity, and the screw device is used for extruding the raw materials from the first end to the second end of the extrusion cavity; the rolling device comprises at least one rolling roller group, each rolling roller group comprises at least one pair of rolling rollers, a rolling gap is arranged between each pair of rolling rollers, and the rolling roller group at the initial end corresponds to the discharge hole of the extrusion cavity. According to the dry-method electrode film preparation device and the battery production line, provided by the invention, the raw materials are subjected to pre-extrusion forming to form a belt-shaped semi-finished product with certain self-supporting property and then subjected to calendering treatment, so that the problem of belt breakage of an electrode film is effectively avoided.
Description
Technical Field
The invention relates to the technical field of battery electrode preparation, in particular to a dry-method electrode film preparation device and a battery production line.
Background
The electrode film is one of the key conditions for determining the energy density of the battery, and in the prior art, the preparation process of the electrode film is mainly divided into a wet coating preparation process and a dry electrode film preparation process.
In the dry method electrode film manufacturing process, firstly, mixing an electrode active material, a conductive agent and an adhesive to obtain electrode powder, and using no solvent; and finally pressing the formed electrode material belt onto a metal foil current collector to form a finished electrode.
In the dry method electrode film manufacturing process in the prior art, raw material dry powder is output to a multi-stage extension roller set from a conveying system, each stage of extension roller set comprises a pair of extension rollers, a gap for raw material to pass through is formed between each pair of extension rollers, the extension rollers can extend the passed raw material to form a dry electrode film, and the raw material dry powder output by the conveying system sequentially passes through the extension action of the multi-stage extension rollers.
However, since the dry powder of the raw material is not self-supporting when being delivered by the delivery system, the dry electrode film is prone to strip breakage.
Disclosure of Invention
The invention provides a dry-method electrode film preparation device and a battery production line, which are characterized in that a raw material is subjected to pre-extrusion forming to form a belt-shaped semi-finished product with certain self-supporting property and then subjected to calendering treatment, so that the problem of belt breakage of an electrode film is effectively avoided.
The invention provides a dry method electrode film preparation device, which comprises:
the extrusion preforming mechanism comprises an extrusion cavity and a screw device arranged in the extrusion cavity, a feed inlet is formed in the first end of the extrusion cavity, a discharge outlet is formed in the second end of the extrusion cavity, and the screw device is used for extruding the raw materials from the first end to the second end of the extrusion cavity;
the rolling device comprises at least one rolling roller group, each rolling roller group comprises at least one pair of rolling rollers, a rolling gap is arranged between each pair of rolling rollers, and the rolling roller group at the initial end corresponds to the discharge hole of the extrusion cavity.
According to the dry-method electrode film preparation device provided by the invention, the extrusion cavity is internally provided with the vibration inner sleeve, and the vibration inner sleeve can vibrate along the extrusion direction vertical to the extrusion cavity.
According to the dry-method electrode film preparation device provided by the invention, along the direction from the first end to the second end of the extrusion cavity, the volume of the inner cavity of the extrusion cavity is gradually reduced, and/or the diameter of the rotating shaft of the spiral device is gradually increased, and/or the diameter of the blade of the spiral device is gradually increased.
According to the dry-method electrode film preparation device provided by the invention, at least two spiral devices are arranged in the extrusion cavity.
According to the dry-method electrode film preparation device provided by the invention, the extension roller is provided with a heating device for heating the roller surface, and the heating device is provided with a temperature adjusting module.
According to the dry-method electrode film preparation device provided by the invention, the edge cutting devices are arranged on two sides of the output end of the rolling device and are used for cutting edges of the dry electrode film formed by rolling.
According to the dry electrode film preparation device provided by the invention, a first auxiliary supporting device is arranged between the discharge hole of the extrusion cavity and the extension roller set positioned at the initial end, and the first auxiliary supporting device is used for supporting the dry electrode film extruded from the extrusion cavity.
According to the dry electrode film preparation device provided by the invention, a second auxiliary supporting device is arranged between two adjacent extension roller sets, and the second auxiliary supporting device is used for supporting the dry electrode film which is extended by the extension roller sets.
The dry-method electrode film preparation device provided by the invention further comprises a feeding mechanism, and a discharge hole of the feeding mechanism is communicated with a feed hole of the extrusion cavity.
The dry-method electrode film preparation device provided by the invention further comprises a feeding mechanism, wherein a stirring device for stirring materials is arranged in the feeding mechanism, and a discharge hole of the feeding mechanism is communicated with a feed hole of the feeding mechanism.
According to the dry-method electrode film preparation device provided by the invention, the discharge hole is in an oval shape, a rectangular shape or a long strip shape with saw-tooth-shaped edges.
The dry-method electrode film preparation device provided by the invention further comprises the following steps:
the dry electrode film detection module is used for detecting the density and the thickness of the dry electrode film;
and the control module is used for controlling the rotating speeds of the feeding mechanism, the screw device and the extension roller.
The dry-method electrode film preparation device comprises an extrusion preforming mechanism and a rolling device, wherein the extrusion preforming mechanism comprises an extrusion cavity and a screw device arranged in the extrusion cavity, a feeding hole is formed in the first end of the extrusion cavity, a discharging hole is formed in the second end of the extrusion cavity, and the screw device is used for extruding raw materials from the first end to the second end of the extrusion cavity. The rolling device comprises at least two rolling roller sets, and the dry electrode film extruded from the extrusion cavity sequentially passes through the rolling action of the rolling roller sets at all levels. Each level of the calendering roller group comprises at least one pair of calendering rollers, a calendering gap is arranged between each pair of calendering rollers, and the dry electrode film is subjected to the calendering action of the calendering rollers when passing through the calendering gap. The rolling roller group at the initial end corresponds to the discharge hole of the extrusion cavity, so that the dry electrode film extruded by the extrusion cavity can be rolled by the rolling roller group at the initial end firstly.
The mixed raw material dry powder enters the extrusion cavity from the feeding hole, under the driving and extrusion effects of the screw device, the mixed raw material dry powder is extruded and is extruded from the discharging hole to form a dry electrode film, and the semi-finished dry electrode film formed after extrusion has certain self-supporting property. And then, the dry electrode film is subjected to the calendering action of each calendering roller group to form a finished dry electrode film.
With the arrangement, the dry-method electrode film preparation device provided by the invention performs pre-extrusion molding on the raw materials to form a strip-shaped semi-finished product with certain self-supporting property, and then performs calendering treatment, so that the problem of strip breakage of the electrode film is effectively avoided.
In a further scheme of the invention, a vibration inner sleeve is arranged in the extrusion cavity and can vibrate along the extrusion direction vertical to the extrusion cavity. The vibrating inner sleeve is nested in the extrusion cavity, the screw device is arranged in the vibrating inner sleeve, the raw material dry powder is conveyed and extruded by the screw device in the vibrating inner sleeve, meanwhile, the vibrating inner sleeve can generate vibrating force perpendicular to the extrusion direction, the raw material dry powder is repeatedly compacted, the extrusion effect of the raw material dry powder is further improved, the dry electrode film extruded by the extruder has better self-supporting performance, and the problem of belt breakage of the dry electrode film is further reduced.
In a further scheme of the invention, along the direction from the feeding hole to the discharging hole of the extrusion cavity, the volume of an inner cavity of the extrusion cavity is gradually reduced, and/or the diameter of a rotating shaft of the screw device is gradually increased, and/or the diameter of a blade of the screw device is gradually increased.
So set up, along feed inlet to discharge gate direction in extrusion chamber, the inner space in extrusion chamber reduces gradually, and then makes the raw materials dry powder increase gradually along with the extrusion force that screw device's transport received, forms better extrusion effect, has further improved the self-supporting nature of the dry electrode membrane that forms after extruding.
In a further aspect of the present invention, at least two screw devices are disposed in the extrusion chamber. So set up, the raw materials dry powder in the extrusion intracavity receives extrusion and transport when two at least screw means, and extrusion efficiency and extrusion effect can effectively be promoted, has further improved the self-supporting nature of the dry electrode membrane that forms after extruding.
The production line provided by the invention has the advantages that the raw materials are subjected to pre-extrusion forming to form a belt-shaped semi-finished product with certain self-supporting property, and then the belt is subjected to calendering treatment, so that the problem of belt breakage of the electrode film is effectively avoided. The derivation process of the beneficial effect is substantially similar to that of the dry electrode film preparation device, and is not repeated here.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic view of a dry electrode film preparation apparatus in an embodiment of the present invention;
FIG. 2 is a schematic view of an extrusion preforming mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of an extrusion preforming mechanism provided with two screw devices according to an embodiment of the present invention;
FIG. 4 is a schematic view showing a variation of the rotation shaft of the screw means in the embodiment of the present invention;
FIG. 5 is a schematic view of a variation of the helical blades of the screw device in an embodiment of the invention;
FIG. 6 is a schematic view of a discharge port shape of an extrusion chamber in an embodiment of the present invention;
FIG. 7 is a schematic view of another discharge port shape of the extrusion chamber in an embodiment of the present invention;
11: a stirring device; 12: a feeding mechanism; 13: a feeding mechanism;
14: a feed inlet of the extrusion chamber; 15: a screw device; 16: an extrusion chamber;
17: vibrating the inner sleeve; 18: a discharge port of the extrusion cavity; 19: a first auxiliary support device;
20: a rolling device; 21: a calendering roller set; 22: a second auxiliary support device;
23: and (4) an edge cutting device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A dry-process electrode film production apparatus including an extrusion preforming mechanism and a rolling apparatus 20 in an embodiment of the present invention is described below with reference to fig. 1 to 7.
The extrusion preforming mechanism comprises an extrusion cavity 16 and a screw device 15 arranged in the extrusion cavity 16, specifically, the screw device 15 may comprise a rotating shaft, a screw blade arranged on the rotating shaft, and a driving device such as a motor, a hydraulic motor or a pneumatic motor for driving the rotating shaft, and two ends of the rotating shaft are mounted at two ends of the extrusion cavity 16 through bearings.
The first end of the extrusion cavity 16 is provided with a feed inlet, the second end is provided with a discharge outlet, the screw device 15 is used for extruding the raw material from the first end of the extrusion cavity 16 to the second end, the raw material dry powder enters from the feed inlet 14 of the extrusion cavity and is extruded from the discharge outlet after the extrusion action of the screw device 15, and the extruded raw material dry powder forms a dry electrode film structure, wherein the cross-sectional shape of the dry electrode film after extrusion is consistent with the shape of the discharge outlet, specifically, the shape of the discharge outlet 18 of the extrusion cavity can be set to be rectangular as shown in fig. 6, zigzag as shown in fig. 7, oval, special-shaped and the like, and the dry electrode film structure can be specifically set according to the actual situation.
The rolling device 20 includes at least one rolling roller set 21, and the embodiment is preferably configured as more than two rolling roller sets 21, and the dry electrode film extruded from the extrusion chamber 16 is sequentially subjected to the rolling action of each rolling roller set 21. Each rolling roller set 21 comprises at least one pair of rolling rollers, a rolling gap is arranged between each pair of rolling rollers, and the dry electrode film is subjected to the rolling action of the rolling rollers when passing through the rolling gap. The calendering roller group 21 at the beginning corresponds to the discharge port 18 of the extrusion chamber so that the dry electrode film extruded from the extrusion chamber 16 can be calendered first by the calendering roller group 21 at the beginning.
It should be noted that the calendering density and thickness of the dry electrode film are affected by the calendering gap between each pair of calendering rolls, and therefore, in actual production, the gap between the calendering rolls can be adjusted according to the density and thickness requirements of the dry electrode film.
In addition, along the direction of transportation of dry electrode membrane, the calendering clearance of each level of calendering roller set 21 can reduce step by step, and the thickness of dry electrode membrane reduces along with the calendering effect of each level of calendering roller set 21 gradually, and density increases gradually, has guaranteed the calendering quality.
In the process of the dry electrode film preparation device provided by this embodiment, the mixed raw material dry powder enters the extrusion cavity 16 from the feeding hole, and under the driving and extrusion effects of the screw device 15, the mixed raw material dry powder is extruded from the discharging hole to form a dry electrode film, and the dry electrode film formed after extrusion has a certain self-supporting property. Then, the dry electrode film is subjected to calendering by each calendering roller group 21 to form a finished dry electrode film.
By the arrangement, the dry-method electrode film preparation device provided by the embodiment performs the pre-extrusion molding on the raw material to form the strip-shaped dry electrode film with certain self-supporting property, and then performs the calendering treatment, thereby effectively avoiding the problem of belt breakage of the dry electrode film.
In a further technical solution, a vibration inner sleeve 17 is arranged in the extrusion chamber 16, and the vibration inner sleeve 17 can vibrate along the extrusion chamber 16 perpendicular to the extrusion direction.
In some embodiments, the vibrating inner sleeve 17 may also be provided as a unitary chamber-like structure that is nested between the screw 15 and the inner wall of the extrusion chamber 16. The exterior of the extrusion chamber 16 may be provided with a vibration generating device, and the specific structure of the vibration generating device may refer to the vibration generating device in the vibrating screen in the prior art, which is not described in detail herein. The vibration generating device can be connected with the vibration inner sleeve 17 through an opening formed on the side wall of the extrusion cavity 16 or an opening at the end part, and further can drive the vibration inner sleeve 17 to generate a vibration effect.
Of course, in some other embodiments, the vibrating inner sleeve 17 may also be a split structure, for example, it may be a pair of half-cavity structures, and the pair of half-cavity structures can be butted to form an integral cavity-like structure, one of the half-cavity structures may be fixed, the other half-cavity structure may be connected to the vibration sound generating device, or both the half-cavity structures may be connected to the vibration generating device.
So set up, vibration endotheca 17 nestification is in the inside of extrusion chamber 16 to screw means 15 sets up in the inside of vibration endotheca 17, and the extrusion is carried by screw means 15 to raw materials dry powder in vibration endotheca 17, and simultaneously, vibration endotheca 17 can produce the vibration of perpendicular to extrusion direction, forms the effect of compaction repeatedly to raw materials dry powder, further improves the extrusion effect to raw materials dry powder, makes the dry electrode membrane of extruding by the extruder have better self-supporting nature, has further reduced the disconnected area problem that the dry electrode membrane appears.
In a further embodiment, the interior of the extrusion chamber 16 may be arranged as follows:
1. the volume of the inner cavity of the extrusion chamber 16 gradually decreases from the first end to the second end of the extrusion chamber 16, for example, the inner wall surface of the extrusion chamber 16 may be a circular table surface, and the large diameter end of the circular table surface is close to the first end of the extrusion chamber 16 and the small diameter end is close to the second end of the extrusion chamber 16;
2. the diameter of the rotating shaft of the screw device 15 gradually increases along the direction from the first end to the second end of the extrusion cavity 16, as shown in fig. 4, for example, the rotating shaft of the screw device 15 is set to be a conical shaft, and the large diameter end of the conical shaft is close to the second end of the extrusion cavity 16 and the small diameter end is close to the first end of the extrusion cavity 16;
3. the diameter of the blades of the screw means 15 increases gradually in the direction from the first end to the second end of the extrusion chamber 16, as shown in fig. 5.
So set up, through the combination of one or more of above-mentioned three kinds of setting methods, can make along the first end to the second end direction in extrusion chamber, the inner space in extrusion chamber 16 reduces gradually, and then makes the raw materials dry powder increase gradually along with the extrusion force that screw means 15's transport received, forms better extrusion effect, has further improved the self-supporting nature of the dry electrode membrane that forms after extruding.
In a further embodiment, at least two screw means 15 are arranged in the extrusion chamber 16, for example, two screw means 15 may be arranged in the extrusion chamber 16, and the rotation axes of the two screw means 15 may be arranged side by side in parallel.
So set up, a plurality of screw means 15 in the extrusion chamber 16 can the simultaneous working, carry the extrusion to the raw materials dry powder simultaneously, have effectively improved extrusion efficiency on the one hand, and a plurality of screw means 15's of on the other hand extrusion force is bigger, can effectively improve the extrusion effect.
In a further embodiment, the calendering roller is provided with heating means for heating the roller surface, the heating means being provided with a temperature regulating module.
In some embodiments, the heating device may be an electric heating device disposed inside the calendering roller, and the roller surface of the calendering roller has thermal conductivity, and the roller surface is heated by the electric heating device, and the temperature adjusting module may adjust the heating temperature by adjusting the current of the electric heating device. Of course, in other embodiments, the heating device may be provided in other types, for example, it may be provided as an air flow heating device, and the heating of the roller surface is realized by blowing the generated hot air flow to the roller surface.
Of course, in some other embodiments, the heating device may directly heat the dry electrode film, for example, the heating device is a gas flow heating device capable of blowing hot air to the surface of the dry electrode film.
So set up, prolong the compression roller and when prolonging the pressure to dry electrode membrane, can heat dry electrode membrane simultaneously, make dry electrode membrane have better toughness and intensity.
In a further embodiment, the two sides of the output end of the rolling device 20 are provided with edge cutting devices 23, and the edge cutting devices 23 are used for cutting edges of the dry electrode film formed by rolling.
The edge cutting device 23 may be specifically a cutter disposed at two sides of the output end of the rolling device 20, and the distance between the two cutters is the width of the dry electrode film after cutting. The distance between the edge cutting devices 23 can be adjusted according to actual requirements, and the dry electrode films output from the output end of the rolling device 20 can reach the width of the actual requirements after the edge cutting of the edge cutting devices 23.
A first auxiliary supporting device 19 is arranged between the discharge port 18 of the extrusion cavity and the stretching roller group 21 at the initial end, and the first auxiliary supporting device 19 is used for supporting the dry electrode film extruded from the extrusion cavity 16.
The first auxiliary supporting device 19 may be embodied as a supporting platform, the table of the supporting platform is a plane, and the dry electrode film extruded from the extrusion cavity 16 is transited to the initial pressing roller group 21 under the supporting effect of the plane. The "starting calender roll group 21" refers to the calender roll group 21 located at the starting end in the direction in which the dry electrode film is sequentially calendered.
Similarly, a second auxiliary supporting device 22 may be provided between the two adjacent rolling roller sets 21 and between the end rolling roller set 21 and the trimming device, and the second auxiliary supporting device 22 may support the dry electrode film rolled by the rolling roller set 21.
The second auxiliary supporting means 22 may have the same structural form as the first auxiliary supporting means 19. With the arrangement, when the dry electrode film extruded from the extrusion cavity 16 enters the rolling device 20 and after the rolling action of each rolling and pressing roller group 21, the dry electrode film can be supported by the auxiliary supporting action, so that the problem of belt breakage caused by the action of self gravity is avoided.
The dry-method electrode film preparation device in the embodiment of the invention can also comprise a feeding mechanism 13, wherein a discharge hole of the feeding mechanism 13 is communicated with a feed inlet 14 of the extrusion cavity. The feeding mechanism 13 may be a screw conveyor or a conveyor belt mechanism, etc., and the feeding mechanism 14 is used for feeding the raw material dry powder into the extrusion chamber 16. In this embodiment, the feeding mechanism 13 is preferably a screw conveyor, a feeding cavity of the screw conveyor may be integrated with the extrusion cavity 16, and a screw shaft of the screw conveyor and a rotating shaft of a screw device in the extrusion cavity 16 are also integrated.
In addition, the dry electrode film manufacturing apparatus provided in this embodiment may further include a feeding mechanism 12, a stirring device 11 for stirring the material is disposed inside the feeding mechanism 12, and a discharge port of the feeding mechanism 12 is communicated with a feed port of the feeding mechanism 13.
The stirring device 11 may specifically include a rotating shaft, a blade provided on the rotating shaft, and a motor driving the rotating shaft. The rotating shaft can be arranged on the side wall of the feeding mechanism 12 through a bearing, and the motor drives the rotating shaft and the blades to rotate so as to stir the raw material dry powder in the feeding mechanism 12.
So set up, the raw materials dry powder after the stirring has better mobility, and then in subsequent feeding mechanism 13 and extrusion chamber 16, the raw materials dry powder can be more even, guarantees that the dry electrode film that extrudes has better uniformity.
In some embodiments, the shape of the discharge port 18 of the extrusion chamber may be a saw-tooth shape in a long strip. So set up, the dry electrode membrane that extrudes is the slice structure, and the surface has the line of cockscomb structure, and in the process is pressed in follow-up extension, even two certain adjacent position thin thickness of dry electrode membrane differ great, the raw materials of cockscomb structure bulge part also enough are filled in thinner position, have guaranteed the thin and thick uniformity of the dry electrode membrane after the extension.
In a further embodiment, the dry electrode film preparation device further comprises a dry electrode film detection module and a control module, wherein the dry electrode film detection module is used for detecting the density and the thickness of the dry electrode film, and in other embodiments, the dry electrode film preparation device can also be used for detecting the width of the dry electrode film. The control module is used for controlling the rotating speed of the screw device 15 and the extension roller.
When the detected density and thickness of the dry electrode film exceed the preset range, the control device can control the rotating speed of the screw device 15 and the extension rollers to adjust the density and thickness of the dry electrode film, or the density and thickness of the dry electrode film can be adjusted by adjusting the extension gaps between the extension rollers.
When the detected width of the dry electrode film is out of the preset range, the cutting width of the dry electrode film may be adjusted by adjusting the interval of the edge slitting device 23. Meanwhile, the control module in the embodiment can also be used for controlling the feeding speed of the feeding mechanism.
According to the production line provided by the embodiment of the invention, the raw materials are subjected to pre-extrusion forming to form a belt-shaped semi-finished product with certain self-supporting property, and then the belt-extending treatment is carried out, so that the problem of belt breakage of the electrode film is effectively avoided. The derivation process of the beneficial effect is substantially similar to that of the dry electrode film preparation device, and is not repeated here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A dry process electrode film preparation apparatus, comprising:
the extrusion preforming mechanism comprises an extrusion cavity and a screw device arranged in the extrusion cavity, a feed inlet is formed in the first end of the extrusion cavity, a discharge outlet is formed in the second end of the extrusion cavity, and the screw device is used for extruding the raw materials from the first end to the second end of the extrusion cavity;
the rolling device comprises at least one rolling roller group, each rolling roller group comprises at least one pair of rolling rollers, a rolling gap is arranged between each pair of rolling rollers, and the rolling roller group at the initial end corresponds to the discharge hole of the extrusion cavity.
2. The dry electrode film production device according to claim 1, wherein a vibration inner sleeve is disposed in the extrusion chamber, and the vibration inner sleeve is capable of vibrating in a direction perpendicular to the extrusion direction of the extrusion chamber.
3. The dry electrode film preparation device according to claim 1 or 2, wherein the volume of the inner cavity of the extrusion cavity is gradually reduced, and/or the diameter of the rotating shaft of the screw device is gradually increased, and/or the diameter of the blade of the screw device is gradually increased along the direction from the first end to the second end of the extrusion cavity.
4. The dry electrode film manufacturing apparatus according to claim 1, wherein at least two of the spiral devices are disposed in the extrusion chamber.
5. The dry electrode film manufacturing device according to claim 1, wherein the calendering roll is provided with a heating device for heating the roll surface, and the heating device is provided with a temperature regulation module.
6. The dry electrode film preparation device according to claim 1, wherein the two sides of the output end of the rolling device are provided with edge cutting devices, and the edge cutting devices are used for cutting edges of the dry electrode film formed by rolling.
7. The dry electrode film preparation device according to claim 1, wherein a first auxiliary support device is arranged between the discharge port of the extrusion cavity and the stretching roller set at the initial end, and the first auxiliary support device is used for supporting the dry electrode film extruded from the extrusion cavity.
8. The dry electrode film preparation device according to claim 7, wherein a second auxiliary support device is arranged between two adjacent rolling roller sets, and the second auxiliary support device is used for supporting the dry electrode film rolled by the rolling roller sets.
9. The dry electrode film preparation device according to claim 1, further comprising a feeding mechanism, wherein a discharge port of the feeding mechanism is communicated with a feed port of the extrusion cavity.
10. The dry electrode film preparation device according to claim 9, further comprising a feeding mechanism, wherein a stirring device for stirring the material is arranged in the feeding mechanism, and a discharge port of the feeding mechanism is communicated with a feed port of the feeding mechanism.
11. The dry electrode film preparation device according to claim 1, wherein the shape of the discharge port is an ellipse, a rectangle or a strip with saw-toothed edges.
12. The dry electrode film production apparatus according to claim 9, further comprising:
the dry electrode film detection module is used for detecting the density and the thickness of the dry electrode film;
and the control module is used for controlling the speeds of the feeding mechanism, the screw device and the extension roller.
13. A battery production line comprising the dry electrode film production apparatus according to any one of claims 1 to 12.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864860A (en) * | 2022-05-20 | 2022-08-05 | 三一技术装备有限公司 | Feeding mechanism, feeding device and dry-method electrode film preparation device |
| CN114975887A (en) * | 2022-06-27 | 2022-08-30 | 蔚来汽车科技(安徽)有限公司 | Processing method for dry electrode film and processing equipment for dry electrode film |
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| CN114864860A (en) * | 2022-05-20 | 2022-08-05 | 三一技术装备有限公司 | Feeding mechanism, feeding device and dry-method electrode film preparation device |
| CN114864860B (en) * | 2022-05-20 | 2023-11-17 | 三一技术装备有限公司 | Feeding mechanism, feeding device and dry electrode film preparation device |
| CN114975887A (en) * | 2022-06-27 | 2022-08-30 | 蔚来汽车科技(安徽)有限公司 | Processing method for dry electrode film and processing equipment for dry electrode film |
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