CN220456476U - Preparation device of composite pole piece and composite pole piece - Google Patents
Preparation device of composite pole piece and composite pole piece Download PDFInfo
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- CN220456476U CN220456476U CN202321841019.XU CN202321841019U CN220456476U CN 220456476 U CN220456476 U CN 220456476U CN 202321841019 U CN202321841019 U CN 202321841019U CN 220456476 U CN220456476 U CN 220456476U
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Abstract
The application relates to a preparation device of a composite pole piece and the composite pole piece. The preparation device comprises: a first shaping roller and a second shaping roller; the electrode pole piece unreeling mechanism is positioned at the upstream of the shaping roller assembly and is used for conveying the electrode pole piece to enable the electrode pole piece to pass through a gap between the first shaping roller and the second shaping roller; the solid electrolyte membrane unreeling mechanism is positioned at the side edge of the electrode pole piece unreeling mechanism and is used for conveying the solid electrolyte membrane to enable the solid electrolyte membrane to pass through a gap between the electrode pole piece and the shaping roller assembly; the heating roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for preheating the electrode pole piece and/or the solid electrolyte membrane; the transition roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for guiding the electrode pole piece and/or the solid electrolyte membrane so as to adjust the preheating time. The reasonable setting of transition roller and heating roller in the preparation facilities of this application effectively controls preheating time.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a preparation device of a composite pole piece and the composite pole piece prepared by the device.
Background
With the advent of the information age, various electronic products in society are layered endlessly, and along with this, the requirements for innovation of various battery technologies are increasing. In particular, in terms of safety, the conventional batteries mostly contain nonaqueous electrolyte, and the electrolyte brings great pollution to the environment and brings potential safety hazards to users due to unexpected side reactions.
In order to improve the safety performance of the battery, it is generally considered to have a positive effect to provide a solid electrolyte layer on the electrode, but since the conventional wet coating process causes curling of the electrode sheet and the interaction of part of the solid electrolyte and the solvent, it is necessary to develop a preparation method of the composite electrode sheet by the dry process. However, at present, a dry process is commonly used for preparing an electrode, a composite electrode prepared by the dry process has weak interlayer bonding force between a solid electrolyte layer and an electrode layer, and the composite electrode has weak mechanical strength.
Disclosure of Invention
Based on this, the application provides a preparation facilities of compound pole piece, adjusts the preheating time of electrode pole piece and/or solid electrolyte membrane through the transition roller, improves the compound effect between electrode pole piece and the solid electrolyte membrane, improves the uniformity of compound pole piece.
In a first aspect of the present application, a device for preparing a composite pole piece is provided, including:
the shaping roller assembly comprises a first shaping roller and a second shaping roller;
the electrode pole piece unreeling mechanism is positioned at the upstream of the shaping roller assembly and is used for conveying the electrode pole piece so that the electrode pole piece passes through a gap between the first shaping roller and the second shaping roller;
the solid electrolyte membrane unreeling mechanism is positioned at the side edge of the electrode pole piece unreeling mechanism and is used for conveying the solid electrolyte membrane so that the solid electrolyte membrane passes through a gap between the electrode pole piece and the shaping roller assembly;
the heating roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for preheating the electrode pole piece and/or the solid electrolyte membrane; and the transition roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for adjusting the preheating time of the electrode pole piece or the solid electrolyte membrane.
In some embodiments, heated rollers are used to preheat the electrode sheet.
In some embodiments, heated rollers are used to preheat the solid electrolyte membrane.
In some embodiments, heated rollers are used to preheat the electrode sheet and solid electrolyte membrane.
In some embodiments, the apparatus for preparing a composite pole piece further comprises:
and the composite pole piece winding mechanism is positioned at the downstream of the shaping roller assembly and is used for receiving the composite pole piece.
In some embodiments, the apparatus for preparing a composite pole piece further comprises:
the base material winding mechanism is positioned between the shaping roller assembly and the composite pole piece winding mechanism and is used for receiving the base material covered on the solid electrolyte membrane;
the substrate winding mechanism and the solid electrolyte membrane unwinding mechanism are positioned on the same side of the electrode pole piece unwinding mechanism.
In some embodiments, the apparatus for preparing a composite pole piece further comprises an elastic member positioned between the shaping roller assembly and the solid electrolyte membrane for buffering when the shaping roller assembly is rolled.
In some embodiments, the apparatus for preparing a composite pole piece further comprises:
the protective film unreeling mechanism is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for conveying the protective film so that the protective film passes through a gap between the solid electrolyte film and the shaping roller assembly;
and the protective film winding mechanism is positioned between the shaping roller assembly and the substrate winding mechanism and is used for receiving the protective film.
In some embodiments, a transition roller is also located downstream of the sizing roller assembly for adjusting the cooling time of the composite pole piece.
In some embodiments, the number of the solid electrolyte membrane unreeling mechanisms is two, and the solid electrolyte membrane unreeling mechanisms are symmetrically arranged at two sides of the electrode pole piece unreeling mechanism.
In a second aspect of the present application, there is provided a composite pole piece prepared from the apparatus provided in the first aspect.
The heating roller is arranged in the preparation device of the composite pole piece, and the electrode pole piece and/or the solid electrolyte membrane are preheated through the heating roller, so that the flexibility of the electrode pole piece and/or the solid electrolyte membrane is improved, and the electrode pole piece and the solid electrolyte membrane are more easily and tightly compounded.
The application sets up a plurality of transition rollers for in preheating the in-process, can realize adjusting electrode plate and/or solid electrolyte membrane's preheating time as required, in order to reach anticipated preheating temperature, make electrode plate and/or solid electrolyte membrane can preheat fully, adjust electrode plate and/or solid electrolyte membrane's compliance, strengthen the cohesion intensity between electrode plate and the solid electrolyte membrane, improve the inseparable degree of compounding of compound pole piece.
The preparation device of the composite pole piece utilizes the buffer provided by the elastic piece when in rolling, so that the solid electrolyte membrane can better cover the electrode pole piece; meanwhile, in the rolling process of the shaping roller assembly, the stress of the middle area of the electrode plate is larger than that of the edge area due to the fact that the middle thickness of the electrode plate is thicker, and the transverse thickness of the electrode plate tends to be consistent after rolling.
Drawings
Fig. 1 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a device for manufacturing a composite pole piece according to an embodiment of the present application.
Description of the reference numerals
11. An electrode pole piece unreeling mechanism; 12. a composite pole piece winding mechanism;
21. a solid electrolyte membrane unreeling mechanism; 22. a substrate winding mechanism;
31. a first forming roller; 32. a second shaping roller;
41. a protective film unreeling mechanism; 42. a protective film winding mechanism,
51. a first transition roller; 52. a second transition roller; 53. a third transition roller; 56. a sixth transition roller; 57. a seventh transition roller; 58. an eighth transition roller; 59. a ninth transition roller; 60. a tenth transition roller; 61. an eleventh transition roller;
71. a first heating roller; 72. a second heating roller; 73. a third heating roller;
81. and (5) a glue layer.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
The direction parallel to the running direction of the electrode pole piece is defined as a longitudinal direction, and the direction perpendicular to the running direction of the electrode pole piece is defined as a transverse direction.
A first aspect of the present application provides a device for preparing a composite pole piece, as shown in fig. 1 to 7, which includes a shaping roller assembly, an electrode pole piece unreeling mechanism 11, a solid electrolyte membrane unreeling mechanism 21, and a heating roller. The shaping roller assembly comprises a first shaping roller 31 and a second shaping roller 32 which are symmetrically arranged on two sides of the electrode pole piece; the connecting line between the axes of the first shaping roller 31 and the second shaping roller 32 is perpendicular to the conveying direction of the electrode sheet.
The electrode sheet unreeling mechanism 11 is located upstream of the shaping roller assembly for unreeling the electrode sheet, and then transporting the electrode sheet so that the electrode sheet passes through a gap between the first shaping roller 31 and the second shaping roller 32.
It is understood that the electrode sheet of the present application is a positive electrode sheet or a negative electrode sheet.
The solid electrolyte membrane unwind mechanism 21 is located upstream of the shaping roller assembly, and more specifically, between the electrode sheet unwind mechanism 11 and the shaping roller assembly. The solid electrolyte film unreeling mechanism 21 is used for unreeling the solid electrolyte film and then conveying the solid electrolyte film so that the solid electrolyte film passes through the gap between the first shaping roller 31 and the second shaping roller 32, and more specifically the solid electrolyte film unreeling mechanism 21 so that the solid electrolyte film passes through the gap between the electrode sheet and the shaping roller assembly.
In some embodiments, the number of the solid electrolyte membrane unreeling mechanisms 21 is two, which are respectively located at both sides of the electrode sheet unreeling mechanism 11, and then the solid electrolyte membrane is transported such that the two layers of the solid electrolyte membrane pass through the gap between the first shaping roller 31 and the second shaping roller 32, respectively, and the electrode sheet is located in the middle of the two layers of the solid electrolyte membrane.
Alternatively, two solid electrolyte membrane unreeling mechanisms 21 are symmetrically arranged on both sides of the electrode sheet unreeling mechanism 11.
The heating roller is positioned between the electrode pole piece unreeling mechanism 11 and the shaping roller assembly and is used for preheating the electrode pole piece and/or the solid electrolyte membrane.
In some embodiments, the apparatus for preparing a composite electrode sheet further comprises a transition roller, wherein the transition roller is positioned between the electrode sheet unreeling mechanism 11 and the shaping roller assembly, and is used for adjusting the preheating time of the electrode sheet and/or the solid electrolyte film.
In some embodiments, the number of transition rollers and heating rollers in the composite pole piece manufacturing apparatus is not particularly limited, and the specific number may be increased or decreased according to actual situations.
In some embodiments, the number of heating rollers may be one, i.e., the first heating roller 71.
In some embodiments, the number of heating rollers is plural, and the temperature of the heating rollers gradually increases in the direction in which the electrode sheet is running. Specifically, the heating rollers may be a first heating roller 71, a second heating roller 72, and a third heating roller 73 in the running direction of the electrode sheet, wherein the number of the first heating roller 71, the second heating roller 72, and the third heating roller 73 may be 1, 2, or more, and is not particularly limited herein.
In some embodiments, the heated roller is used to preheat the electrode sheet alone and not to preheat the solid electrolyte membrane.
In some embodiments, the heated roller is used to preheat the solid electrolyte membrane alone, without preheating the electrode sheet.
In some embodiments, heated rollers are used to preheat the electrode sheet and solid electrolyte membrane. It is understood that the electrode sheet and the solid electrolyte membrane may be preheated using the same heated roller; different heated rolls may also be used for preheating.
In some embodiments, a transition roller is provided between the electrode sheet unwind mechanism 11 and the heated roller for providing a guiding action for the electrode sheet and/or for the electrode sheet.
In some embodiments, a transition roller is provided between the solid electrolyte membrane unwind mechanism 21 and the heated roller for providing a guiding action for the solid electrolyte membrane. By adjusting the relative position between the transition roller and the heating roller, the preheating time of the electrode sheet and/or the solid electrolyte membrane can be adjusted.
The elastic member is located between the first setting roller 31 and the second setting roller 32.
In the electrode plate production process, in order to smoothly carry out the subsequent rolling process, the edge of the electrode plate is usually thinned, and the existence of the thinned area of the electrode plate leads the bonding of the solid electrolyte membrane and the electrode plate to be affected.
In some embodiments, the preparation device of the composite pole piece utilizes the buffer provided by the elastic piece when in rolling, so that the solid electrolyte membrane can better cover the electrode pole piece; meanwhile, in the rolling process of the shaping roller assembly, the stress of the middle area of the electrode plate is larger than that of the edge area due to the fact that the middle thickness of the electrode plate is thicker, and the transverse thickness of the electrode plate tends to be consistent after rolling.
In some embodiments, the elastic member is made of a flexible material, the flexible material is elastically deformed under the action of pressure, and the slight elastic deformation enables the thickness of the middle area and the thinned area of the electrode pole piece to be consistent under the action of pressure, so that the electrode pole piece and the solid electrolyte membrane can be well attached.
In some embodiments, the flexible material is a polymer.
The material of the polymer is not particularly limited, and the polymer can be polytetrafluoroethylene, polyethylene terephthalate, polypropylene, polyacrylonitrile and other plastics, rubber such as HEPA (high performance polyethylene) rubber, silicone rubber, fluororubber and other rubber, or elastic material such as silica gel and the like which can deform to a certain extent.
The thickness of the elastic member is not particularly limited in the present application, and the necessary adjustment of the thickness of the elastic member is understood to be within the scope of the present application without departing from the inventive concept of the present application.
In some embodiments, the elastic member is a glue layer 81 that surrounds the outside of the first shaping roller 31 and/or the second shaping roller 32.
In some embodiments, the elastic member is a protective film that is transported through a gap between the sizing roller assembly and the solid electrolyte membrane.
The device for preparing the composite pole piece of the application also comprises a protective film unreeling mechanism 41 for unreeling the protective film. The protective film unreeling mechanism 41 is located upstream of the shaping roller assembly, and is disposed between the solid electrolyte film unreeling mechanism 21 and the shaping roller assembly. In the roll-lamination process of the electrode sheet and the solid electrolyte membrane, the protective film is located in the gap between the first shaping roller 31 and the second shaping roller 32, and is interposed between the shaping roller assembly and the solid electrolyte membrane.
The present application has no special requirements on the structure of the protective film, and on the basis of not departing from the inventive concept of the present application, a film layer which can generate a certain degree of elastic deformation under a certain pressure is known to be used in the present application, and the protective film can be selected from a polymer film or a non-woven fabric, wherein the non-woven fabric comprises but is not limited to a PP-based non-woven fabric, a PE-based non-woven fabric, a PET-based non-woven fabric, a PAN-based non-woven fabric, a PTFE-based non-woven fabric, a Celgard non-woven fabric and the like by way of illustration only and not limitation on the protection scope; the polymer film may be selected from PVDF film, PE film, PP film, PE/PP/PE film, PP/PE/PP film, PTFE film, silicone oil release film, fluorine release film, PET film, non-silicon release film, etc. It is understood that the protective film may also be a multilayer structure consisting of two or more layers of polymer film and/or nonwoven fabric.
The thickness of the protective film is not particularly limited, and conventional adjustment of the thickness of the protective film for adjusting the rolling effect is considered to be within the scope of the present application without departing from the inventive concept of the present application, and it is understood that when the protective film is a multilayer structure, the thickness of the protective film should be the sum of the thicknesses of the multilayer structure.
In some embodiments, the composite pole piece manufacturing apparatus further includes a composite pole piece winding mechanism 12. The composite pole piece winding mechanism 12 is located at the downstream of the shaping roller assembly and is used for providing a tensile force along the movement direction of the electrode pole piece for the electrode pole piece and receiving the composite pole piece obtained after being rolled by the shaping roller assembly to finish winding action.
In some embodiments, the apparatus for preparing a composite pole piece further includes a substrate take-up mechanism 22.
When the base material is arranged on the solid electrolyte membrane, the base material covers one side of the solid electrolyte membrane far away from the electrode plate, and the base material is required to be separated after the electrode plate and the solid electrolyte membrane are rolled by the shaping roller assembly to obtain the composite electrode plate. The substrate winding mechanism 22 is arranged at the downstream of the shaping roller assembly and is used for separating the substrate from the composite pole piece. In the separation process, the substrate winding mechanism 22 provides a pulling force to the substrate covered on the solid electrolyte membrane, so that the substrate is separated from the composite pole piece, and the substrate winding action is completed if necessary.
The number of the substrate winding mechanisms 22 corresponds to the number of the solid electrolyte membrane unwinding mechanisms 21, and the substrate winding mechanisms 22 and the solid electrolyte membrane unwinding mechanisms 21 are located on the same side of the electrode sheet unwinding mechanism 11.
In some embodiments, a transition roller may also be provided between the sizing roller assembly and the substrate take-up mechanism 22, which transition roller is used to provide a guiding action for the substrate separated from the composite pole piece.
In some embodiments, the apparatus for preparing a composite pole piece further includes a protective film winding mechanism 42. The protective film winding mechanism 42 is located downstream of the shaping roller assembly, is disposed between the shaping roller assembly and the composite pole piece winding mechanism 12, and is configured to provide a tensile force to the protective film and to wind up and receive the protective film.
In some embodiments, a transition roller is provided between the protective film unreeling mechanism 41 and the shaping roller assembly for providing a guiding function for the solid electrolyte film and/or the protective film. A transition roller may also be provided between the sizing roller assembly and the protective film take-up mechanism 42 for providing a guiding function for the recovery of the protective film.
In some embodiments, heated rollers are used to preheat the electrode sheet, solid electrolyte membrane, and protective film. It is understood that the electrode sheet, the solid electrolyte membrane and the protective film can be preheated by the same heating roller; different heated rolls may also be used for preheating.
In some embodiments, the heated roller is used to preheat the electrode sheet, solid electrolyte membrane, and not to preheat the protective film.
In some embodiments, the preparation device of the composite pole piece further comprises an unreeling deviation rectifying component, a pole piece static eliminating component and the like which are sequentially arranged along the unreeling route. The unreeling deviation correcting component can correct unreeling and running routes of the electrode pole pieces, the solid electrolyte membrane and the like, so that the starting material line is kept at the same level. The winding and unwinding mechanism of the main material adopts a single-station deviation correction, and the winding and unwinding of the rest materials adopts cantilever type with deviation correction. The static eliminating assembly performs static eliminating treatment on the two sides of the electrode pole piece, so that friction force between the pole piece and the conveying roller can be reduced. It is understood that known functional components or structures may be used in the present application throughout the process of winding, rolling, unwinding without departing from the inventive concepts of the present application.
In some embodiments, the sizing roller assembly has a width of 500-800mm, including but not limited to 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 800mm. Preferably 550-650mm.
In some embodiments, the sizing roller assembly has a roller diameter of 300-500mm, including but not limited to 300mm, 350mm, 400mm, 450mm, 500mm. Preferably 350-450mm.
In some embodiments, the tonnage of the sizing roll assembly is 10-15 tons, including but not limited to 11 tons, 12 tons, 13 tons, 14 tons, 15 tons. Preferably 11-13 tons.
In some embodiments, the mechanical speed of the sizing roller assembly is 10-60m/min, including but not limited to 10m/min, 20m/min, 30m/min, 40m/min, 45m/min, 50m/min, 60m/min.
It can be understood that the higher the tape running speed of the whole composite pole piece preparation device is, the higher the production efficiency is, but the higher the tape running speed is, the problems of tape breakage and the like of the tape running pole piece and the solid electrolyte membrane are easily caused. The residence time of the electrode pole piece and the solid electrolyte membrane in the gap of the shaping roller assembly is not particularly required, and the adjustment of the residence time without creative labor on the basis of not deviating from the inventive concept of the application is understood to fall within the protection scope of the application.
In some embodiments, the linear speeds of the first shaping roller 31 and the second shaping roller 32 are kept consistent, the linear speed of unreeling of the electrode pole piece unreeling mechanism 11 and the linear speed of reeling of the composite pole piece reeling mechanism 12 are also kept consistent, the action consistency of the whole composite pole piece rolling preparation process is improved, and the consistency of the composite pole piece is improved.
In some embodiments, the sizing roller assembly is internally provided with a heating unit, the temperature of which heats the sizing roller in the range of 100-300 ℃, including but not limited to 100 ℃, 150 ℃, 200 ℃, 250 ℃, 300 ℃. Preferably 150-200 ℃.
In some embodiments, the elastic member in the apparatus for preparing a composite pole piece is an adhesive layer 81, and the solid electrolyte membrane is not covered with a substrate. Referring to fig. 1-3, the electrode sheet and/or the solid electrolyte membrane are preheated using the same or different heated rolls. Specifically, the heating roller in fig. 1 is only used for preheating the electrode plate; in fig. 2, the same heating roller is adopted to preheat the electrode plate and the solid electrolyte membrane simultaneously; in fig. 3, different heating rollers are used to preheat the electrode sheet and the solid electrolyte membrane, respectively. Exemplary:
fig. 1 is a schematic structural diagram of a preparation device of a heating roller for preheating electrode pole pieces individually, and the specific use process is as follows: unreeling the electrode sheet by the electrode sheet unreeling mechanism 11 and conveying the electrode sheet to the composite sheet reeling mechanism 12, wherein the electrode sheet sequentially passes through a gap between the first transition roller 51, the first heating roller 71, the second heating roller 72, the ninth transition roller 59, the first shaping roller 31 and the second shaping roller 32; the solid electrolyte film is respectively conveyed by the solid electrolyte film unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode plate unreeling mechanism 11, the solid electrolyte film sequentially passes through the gaps among the second transition roller 52, the third transition roller 53, the shaping roller assembly and the electrode plate, the solid electrolyte is positioned between the shaping roller assembly and the electrode plate, and the electrode plate and the solid electrolyte film are roll-compounded by the first shaping roller 31 with the outer side covered with the adhesive layer 81 and the second shaping roller 32 with the outer side covered with the adhesive layer 81 to obtain a compound electrode plate; the composite pole piece reaches the composite pole piece winding mechanism 12, and the composite pole piece is received by the composite pole piece winding mechanism 12.
Fig. 2 is a schematic structural diagram of a preparation device for preheating an electrode sheet and a solid electrolyte membrane by using the same heating roller, and the specific use process is as follows: unreeling the electrode pole piece through an electrode pole piece unreeling mechanism 11 and conveying the electrode pole piece to a composite pole piece reeling mechanism 12; the solid electrolyte film is respectively conveyed by the solid electrolyte film unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode plate unreeling mechanism 11, the electrode plate and the solid electrolyte film are firstly attached to the first transition roller 51 and then sequentially pass through gaps among the first heating roller 71, the second heating roller 72, the ninth transition roller 59, the first shaping roller 31 and the second shaping roller 32, the solid electrolyte is positioned between the shaping roller assembly and the electrode plate, and the electrode plate attached together and the solid electrolyte film are rolled and compounded by the first shaping roller 31 with the outer side covered with the adhesive layer 81 and the second shaping roller 32 with the outer side covered with the adhesive layer 81 to obtain a composite electrode plate; the composite pole piece reaches the composite pole piece winding mechanism 12, and the composite pole piece is received by the composite pole piece winding mechanism 12.
Fig. 3 is a schematic structural diagram of a preparation device for preheating electrode plates and solid electrolyte membranes by using different heating rollers, and the specific use process is as follows: unreeling the electrode sheet by the electrode sheet unreeling mechanism 11 and conveying the electrode sheet to the composite sheet reeling mechanism 12, wherein the electrode sheet sequentially passes through a gap between the first transition roller 51, the first heating roller 71, the sixth transition roller 56, the ninth transition roller 59, the first shaping roller 31 and the second shaping roller 32; the solid electrolyte film is respectively conveyed by the solid electrolyte film unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode plate unreeling mechanism 11, the solid electrolyte film sequentially passes through a gap between the second transition roller 52, the second heating roller 72, the ninth transition roller 59, the shaping roller assembly and the electrode plate, the solid electrolyte is positioned between the shaping roller assembly and the electrode plate, and the electrode plate and the solid electrolyte film are rolled and compounded by the first shaping roller 31 with the outer side covered with the adhesive layer 81 and the second shaping roller 32 with the outer side covered with the adhesive layer 81 to obtain a composite electrode plate; the composite pole piece sequentially reaches the composite pole piece winding mechanism 12, and the composite pole piece is received by the composite pole piece winding mechanism 12.
In the example of fig. 1-3 described above, the glue layer 81 covers the outside of the first and second sizing rollers. When the shaping roller assembly rotates, the adhesive layer 81 rotates with the shaping roller assembly; and when the shaping roller assembly rolls the solid electrolyte membrane and/or the electrode pole piece, the adhesive layer 81 provides a buffer effect on the solid electrolyte membrane and/or the electrode pole piece, so that the solid electrolyte membrane can better cover one side or two sides of the electrode pole piece, and meanwhile, the consistency of the transverse thickness of the rolled electrode pole piece is improved.
In some embodiments, the elastic member is a protective film in the apparatus for manufacturing a composite pole piece, the protective film can be unwound by two protective film unwinding mechanisms 41 located at the side of the solid electrolyte film unwinding mechanism 21 away from the electrode pole piece, and the two protective film unwinding mechanisms 41 respectively convey the protective film to the shaping roller assembly, so that the two protective films pass through the gap between the first shaping roller 31 and the second shaping roller 32. In the gap between the first shaping roller 31 and the second shaping roller 32, the protective film, the solid electrolyte film, the electrode pole piece, the solid electrolyte film and the protective film are sequentially distributed in pairs, and the solid electrolyte film is compounded on two sides of the electrode pole piece under the rolling action of the shaping roller assembly, so that the compound pole piece is obtained.
The shaping roller assembly applies tension to the electrode pole piece and the solid electrolyte membrane during rolling, and the two layers of protective films are positioned between the shaping roller assembly and the solid electrolyte membrane to play a role in buffering, so that the forces received by all sites of the electrode pole piece and the solid electrolyte membrane are uniform, the solid electrolyte membrane in the composite pole piece is finally obtained to almost completely cover the electrode pole piece, the combination between the electrode pole piece and the solid electrolyte membrane is better, the consistency of the transverse thickness of the composite pole piece is improved, and the compaction density is also improved.
In some embodiments, the elastic member in the apparatus for producing a composite pole piece is a protective film, and the solid electrolyte membrane is not covered with a base material. Referring to fig. 4-5, the electrode sheet, solid electrolyte membrane, and protective film are preheated by the same or different heated rolls. Specifically, in fig. 4, the electrode plate, the solid electrolyte membrane and the protective film are preheated by adopting the same heating roller; in fig. 5, electrode plates, solid electrolyte membranes and protective films are preheated by adopting different heating rollers. Exemplary:
fig. 4 is a schematic structural diagram of a preparation device for preheating an electrode plate, a solid electrolyte membrane and a protective film by adopting the same heating roller, and the specific use process is as follows: unreeling the electrode sheet by the electrode sheet unreeling mechanism 11 and conveying the electrode sheet to the composite sheet reeling mechanism 12, wherein the electrode sheet directly reaches the first transition roller 51; the solid electrolyte membrane is respectively conveyed by solid electrolyte membrane unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode pole piece unreeling mechanism 11; the protective films are respectively conveyed through protective film unreeling mechanisms 41 positioned on the upper side and the lower side of the electrode pole piece unreeling mechanism 11, the solid electrolyte film and the protective film positioned in the upper side area of the electrode pole piece unreeling mechanism 11 directly reach a first transition roller 51, the solid electrolyte film and the protective film positioned in the lower side area of the electrode pole piece firstly pass through a seventh transition roller 57 and then reach the first transition roller 51, the electrode pole piece, two layers of solid electrolyte films and two layers of protective films are attached on the first transition roller 51 and then sequentially pass through gaps among a first heating roller 71, a second heating roller 72, a ninth transition roller 59, a first shaping roller 31 and a second shaping roller 32, the solid electrolyte is positioned between the shaping roller assembly and the electrode pole piece, the protective film is positioned between the shaping roller assembly and the solid electrolyte film, and the electrode pole piece attached together, and the solid electrolyte film are rolled and compounded through the first shaping roller 31 and the second shaping roller 32 to obtain a compound pole piece covered with the protective film; then the winding action of the two layers of protective films is completed through the two protective film winding mechanisms 42, so that the protective films are separated from the composite pole piece; the composite pole piece reaches the composite pole piece winding mechanism 12, and the composite pole piece is received through the composite pole piece winding mechanism 12.
Fig. 5 is a schematic structural diagram of a preparation device for preheating electrode plates, solid electrolyte membranes and protective films by using different heating rollers, and the specific use process is as follows: unreeling the electrode sheet by the electrode sheet unreeling mechanism 11 and conveying the electrode sheet to the composite sheet reeling mechanism 12, wherein the electrode sheet sequentially passes through a gap between the first transition roller 51, the first heating roller 71, the sixth transition roller 56, the ninth transition roller 59, the first shaping roller 31 and the second shaping roller 32; the solid electrolyte film is respectively conveyed by the solid electrolyte film unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode plate unreeling mechanism 11, and sequentially passes through the gaps among the second heating roller 72, the ninth transition roller 59, the shaping roller assembly and the electrode plate, wherein the solid electrolyte is positioned between the shaping roller assembly and the electrode plate; the protective films are respectively conveyed through protective film unreeling mechanisms 41 positioned on the upper side edge and the lower side edge of the electrode pole piece unreeling mechanism 11, the protective films sequentially pass through gaps among the third heating roller 73, the ninth transition roller 59, the shaping roller assembly and the electrode pole piece, the protective films are positioned between the shaping roller assembly and the solid electrolyte film, and the electrode pole piece, the solid electrolyte film and the protective films which are attached together are rolled and compounded through the first shaping roller 31 and the second shaping roller 32 to obtain a composite pole piece covered with the protective films; then the protective film passes through an eighth transition roller 58 from the shaping roller assembly to reach the protective film winding mechanism 42, and the winding action of the two layers of protective films is completed through the two protective film winding mechanisms 42, so that the protective film is separated from the composite pole piece; the composite pole piece reaches the composite pole piece winding mechanism 12, and the composite pole piece is received through the composite pole piece winding mechanism 12.
In some embodiments, the solid electrolyte membrane is covered with a substrate to provide support to the solid electrolyte membrane. The solid electrolyte membrane unreeling mechanism 21 makes the base material be located at the side of the solid electrolyte membrane far from the electrode plate when the solid electrolyte membrane is transported. And separating the base material from the composite electrode plate after the solid electrolyte membrane and the electrode plate are compounded.
When the solid electrolyte membrane is covered with the base material, the preparation device further comprises a base material winding mechanism 22, and the base material winding mechanism 22 is positioned on the upper side and the lower side of the area between the shaping roller assembly and the composite pole piece winding mechanism 12. The binding force between the base material and the solid electrolyte membrane is smaller than the binding force between the solid electrolyte membrane and the electrode plate. After roll lamination, at least a portion of the solid electrolyte is transferred to the electrode and separated from the substrate.
On the basis of fig. 5, the solid electrolyte membrane is covered with a base material. Referring to fig. 6-7, the protective film and the substrate of fig. 6 are simultaneously separated from the composite pole piece; the protective film and the substrate are separated from the composite pole piece in sequence in fig. 7; i.e., the path taken by the substrate from the patterned roll assembly to the substrate take-up mechanism 22 is different. Exemplary:
referring to fig. 6-7, the electrode sheet, the solid electrolyte membrane and the protective film are preheated by using different heating rollers, the base material and the protective film in fig. 6 are synchronously separated from the composite sheet and reach the base material winding mechanism 22 through the same transition roller; the substrate and protective film of fig. 7 are separated from the composite pole piece sequentially and pass through different transition rolls to the substrate winding mechanism 22. The specific use process is as follows: unreeling the electrode sheet by the electrode sheet unreeling mechanism 11 and conveying the electrode sheet to the composite sheet reeling mechanism 12, wherein the electrode sheet sequentially passes through a gap between the first transition roller 51, the first heating roller 71, the sixth transition roller 56, the ninth transition roller 59, the first shaping roller 31 and the second shaping roller 32; the solid electrolyte film is respectively conveyed by the solid electrolyte film unreeling mechanisms 21 positioned at the upper side and the lower side of the electrode plate unreeling mechanism 11, and sequentially passes through the gaps among the second heating roller 72, the ninth transition roller 59, the shaping roller assembly and the electrode plate, wherein the solid electrolyte is positioned between the shaping roller assembly and the electrode plate; the protective films are respectively conveyed through protective film unreeling mechanisms 41 positioned on the upper side edge and the lower side edge of the electrode pole piece unreeling mechanism 11, the protective films sequentially pass through gaps among the third heating roller 73, the ninth transition roller 59, the shaping roller assembly and the electrode pole pieces, the protective films are positioned between the shaping roller assembly and the solid electrolyte film, and the electrode pole pieces, the solid electrolyte film and the protective films which are attached together are rolled and compounded through the first shaping roller 31 and the second shaping roller 32 to obtain a composite pole piece covered with the protective films and the base materials; in fig. 6, the protective film passes through the eighth transition roller 58 from the shaping roller assembly and the substrate, then reaches the protective film winding mechanism 42 and the substrate winding mechanism 22 respectively, the winding action of the protective film is completed through the protective film winding mechanism 42, the protective film is separated from the composite pole piece, the winding action of the substrate is completed through the substrate winding mechanism 22, and the substrate is separated from the surface of the solid electrolyte membrane; in fig. 7, the protective film passes through the eighth transition roller 58 from the shaping roller assembly and reaches the protective film winding mechanism 42, and the substrate passes through the tenth transition roller 60 and the eleventh transition roller 61 from the shaping roller assembly and reaches the substrate winding mechanism 22; the composite pole piece is notified to reach the composite pole piece winding mechanism 12, and the composite pole piece is received through the composite pole piece winding mechanism 12.
In the above example, alternatively, the number of the first heating roller 71 or the second heating roller 72 may be 1, 2 or more, and the number of the first heating roller 71 and the second heating roller 72 is not particularly limited here, and may be selectively replaced according to actual needs.
In the above example, the number of the ninth transition rollers 59 may be 1, 2 or may be replaced by two or more transition rollers, and the number of the ninth transition rollers 59 is not particularly limited and may be selected and replaced according to actual needs; and can also be replaced by an unreeling deviation correcting component. Similarly, the number of other transition rollers, such as the first transition roller 51, the second transition roller 52, etc., is not particularly limited, and may be selected according to actual needs.
In the above example, alternatively, the number of the solid electrolyte membrane unreeling mechanisms 21 may be 1.
The distribution mode of the transition rollers in the composite pole piece preparation device is not limited to the above examples, and the distribution mode of the transition rollers is not particularly limited, and any distribution mode capable of realizing the adjustment of the preheating time is included in the protection scope of the application on the basis of not departing from the inventive concept of the application.
The second aspect of the application provides a composite pole piece prepared by adopting the preparation device provided by the first aspect.
According to the method, the plurality of transition rollers control the contact conditions of the electrode pole pieces and/or the solid electrolyte membranes and the heating rollers through guiding the electrode pole pieces and/or the solid electrolyte membranes and/or the protective membranes, so that the advancing distances of the electrode pole pieces and/or the solid electrolyte membranes on the heating rollers are different, and the preheating time can be adjusted; the preheating temperature is regulated and controlled by controlling the temperature and the quantity of the heating rollers through which each membrane passes. Through the reasonable arrangement to transition roller quantity and position for the preheating process of different diaphragms does not influence each other, and the operability is strong, and the controllability is high, easy to maintain, guaranteed the homogeneity of preheating simultaneously, improved the cohesion of compound positive pole piece, prevented that the battery from taking place to fall the powder at charge-discharge cyclic in-process.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A device for preparing a composite pole piece, the device comprising:
the shaping roller assembly comprises a first shaping roller and a second shaping roller;
the electrode pole piece unreeling mechanism is positioned at the upstream of the shaping roller assembly and is used for conveying the electrode pole piece so that the electrode pole piece passes through a gap between the first shaping roller and the second shaping roller;
the solid electrolyte membrane unreeling mechanism is positioned at the side edge of the electrode pole piece unreeling mechanism and is used for conveying the solid electrolyte membrane so that the solid electrolyte membrane passes through a gap between the electrode pole piece and the shaping roller assembly;
the heating roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for preheating the electrode pole piece and/or the solid electrolyte membrane; and
the transition roller is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for guiding the electrode pole piece and/or the solid electrolyte membrane so as to adjust the preheating time.
2. The apparatus of claim 1, wherein the heated roller is used to preheat the electrode sheet.
3. The apparatus according to claim 1, wherein the heated roller is used to preheat the solid electrolyte membrane.
4. The apparatus of claim 1, wherein the heated roller is used to preheat the electrode sheet and the solid electrolyte membrane.
5. The apparatus according to any one of claims 1-4, wherein the apparatus further comprises:
and the composite pole piece winding mechanism is positioned at the downstream of the shaping roller assembly and is used for receiving the composite pole piece.
6. The apparatus of claim 5, wherein the apparatus further comprises:
the base material winding mechanism is positioned between the shaping roller assembly and the composite pole piece winding mechanism and is used for receiving the base material covered on the solid electrolyte membrane;
the substrate winding mechanism and the solid electrolyte membrane unwinding mechanism are positioned on the same side of the electrode pole piece unwinding mechanism.
7. The apparatus according to claim 6, further comprising an elastic member between said shaping roll assembly and said solid electrolyte membrane for cushioning when said shaping roll assembly is rolled.
8. The device of claim 7, wherein the elastic member is a protective film, the device further comprising:
the protective film unreeling mechanism is positioned between the electrode pole piece unreeling mechanism and the shaping roller assembly and is used for conveying the protective film so that the protective film passes through a gap between the solid electrolyte film and the shaping roller assembly;
and the protective film winding mechanism is positioned between the shaping roller assembly and the base material winding mechanism and is used for receiving the protective film.
9. The apparatus according to any one of claims 1 to 4, wherein the number of the solid electrolyte membrane unreeling mechanisms is two, symmetrically disposed on both sides of the electrode sheet unreeling mechanism.
10. A composite pole piece, characterized in that it is produced by the device according to any one of claims 1-9.
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| CN202321841019.XU CN220456476U (en) | 2023-07-13 | 2023-07-13 | Preparation device of composite pole piece and composite pole piece |
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| CN202321841019.XU CN220456476U (en) | 2023-07-13 | 2023-07-13 | Preparation device of composite pole piece and composite pole piece |
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