Solid electrolyte preparation device and preparation method

Abstract

The invention discloses a solid electrolyte preparation device and a preparation method. The solid electrolyte preparation device comprises a first compression roller assembly and a second compression roller assembly, the composite compression roller assembly and the first compression roller assembly are arranged in the horizontal direction; the second compression roller assembly and the composite compression roller assembly are arranged in the vertical direction; and the unwinding assembly and the second pressing roller assembly are arranged in the horizontal direction. According to the technical scheme provided by the invention, the condition that the first diaphragm or the second diaphragm or the first sub-diaphragm is fractured when the first diaphragm or the second diaphragm or the first sub-diaphragm is independently thinned to the preset thickness can be reduced, so that the production quality can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a solid electrolyte preparation device and preparation method. Background Art

[0002] In the production and manufacturing of solid-state lithium batteries, the inherent characteristics of the dry electrode process (solvent-free, high elasticity, high density, and high compatibility) are highly consistent with solid-state battery technology.

[0003] In related technologies, when preparing electrolyte membranes using a dry process, a single electrolyte membrane is usually prepared. However, the required thickness of the electrolyte membrane is relatively thin, and the membrane will break during the thinning process. Therefore, the electrolyte membrane thickness requirement of high-energy-density solid-state batteries cannot be met. Summary of the Invention

[0004] One purpose of the embodiments of the present application is to provide a solid electrolyte preparation device and preparation method.

[0005] According to a first aspect of an embodiment of the present application, a solid electrolyte preparation device is provided, comprising:

[0006] a first pressure roller assembly;

[0007] A composite pressure roller assembly, wherein the composite pressure roller assembly and the first pressure roller assembly are arranged in a horizontal direction;

[0008] a second pressing roller assembly, wherein the second pressing roller assembly and the composite pressing roller assembly are arranged in a vertical direction;

[0009] An unwinding assembly, wherein the unwinding assembly and the second pressing roller assembly are arranged in a horizontal direction.

[0010] Optionally, the solid electrolyte preparation device includes at least one third press roller assembly, the third press roller assembly and the second press roller assembly are arranged with intervals in the horizontal direction, and the third press roller assembly and the composite press roller assembly are arranged in the vertical direction.

[0011] Optionally, the composite pressing roller assembly includes a plurality of first rollers, and the plurality of first rollers are arranged in a horizontal direction;

[0012] The second pressing roller assembly and the third pressing roller assembly are respectively arranged adjacent to different first rollers.

[0013] Optionally, there is at least one first roller between the second pressing roller assembly and the third pressing roller assembly.

[0014] Optionally, the third pressing roller assembly includes a second roller and a third roller, and the third roller and the first roller are arranged in a vertical direction;

[0015] A line connecting the center of the second roller and the center of the third roller is a first connecting line;

[0016] A line connecting the center of the third roller and the center of the first roller is a second connecting line;

[0017] An angle M is formed between the first connecting line and the second connecting line, and 90°≥M≥0°.

[0018] Optionally, the composite pressing roller assembly includes a plurality of first rollers, and the plurality of first rollers are arranged in a horizontal direction;

[0019] The first pressing roller assembly includes at least two fourth rollers, and the two fourth rollers and the plurality of first rollers are arranged in a horizontal direction.

[0020] Optionally, the second pressing roller assembly includes a fifth roller and a sixth roller, and the sixth roller and the first roller are arranged in a vertical direction;

[0021] The line connecting the center of the fifth roller and the center of the sixth roller is the third connecting line;

[0022] A line connecting the center of the sixth roller and the center of the first roller is a fourth line;

[0023] An included angle K is formed between the third connecting line and the fourth connecting line, and 90°≥M≥0°.

[0024] Optionally, the solid electrolyte preparation device further includes a thinning roller assembly, and the thinning roller assembly is arranged adjacent to a side of the composite roller assembly away from the first roller assembly.

[0025] According to a second aspect of an embodiment of the present application, a method for preparing a solid electrolyte is provided, the method comprising:

[0026] S1, the first pressing roller assembly calenders and conveys the first film to the composite pressing roller assembly;

[0027] S2, calendaring and conveying the second film to the composite pressing roller assembly;

[0028] S3, combining the first membrane and the second membrane to form a first composite membrane, and thinning the first composite membrane;

[0029] S4. The composite pressing roller assembly composites the first composite film and the substrate to form a second composite film.

[0030] Optionally, in S2, the second pressing roller assembly calenders and conveys the second film to the composite pressing roller assembly.

[0031] Optionally, the first membrane is an electrode membrane, and the second membrane is an electrolyte membrane.

[0032] Optionally, the second diaphragm includes a first sub-diaphragm and a second sub-diaphragm;

[0033] The S2 includes:

[0034] A second pressing roller assembly calenders and conveys the first sub-film to the composite pressing roller assembly;

[0035] A third pressing roller assembly calenders and conveys the second sub-film to the composite pressing roller assembly;

[0036] The S3 includes:

[0037] Composite the first membrane and the first sub-membrane to form a first sub-composite membrane, and thin the first sub-composite membrane;

[0038] The first sub-composite membrane and the second sub-membrane are then combined to form the first composite membrane.

[0039] Optionally, the first membrane is an electrode membrane, the first sub-membrane is an electrolyte membrane, and the second sub-membrane is an electrolyte membrane; or

[0040] The first membrane is an electrode membrane, the first sub-membrane is an electrode membrane, and the second sub-membrane is an electrolyte membrane.

[0041] Optionally, the substrate is a current collector or a release film.

[0042] Optionally, the preparation method further comprises:

[0043] S5. Thinning the second composite membrane.

[0044] One technical effect of an embodiment of the present application is that two diaphragms are compounded together through a composite pressure roller assembly and then thinned, and then the compounded diaphragm is compounded with a substrate; thereby reducing the possibility of breakage when the first diaphragm or the second diaphragm or the first sub-diaphragm is thinned to a preset thickness separately, thereby improving production quality.

[0045] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0047] Figure 1Schematic diagram of the structure of a solid electrolyte preparation device in an embodiment of the present application;

[0048] Figure 2 Schematic diagram of the structure of a solid electrolyte preparation device in an embodiment of the present application;

[0049] Figure 3 Schematic diagram of the structure of a solid electrolyte preparation device in an embodiment of the present application;

[0050] Figure 4 Schematic diagram of the structure of the second composite membrane in the embodiment of the present application;

[0051] Figure 5 Schematic diagram of the structure of the second composite membrane in the embodiment of the present application;

[0052] Figure 6 Schematic diagram of the structure of the second composite membrane in the embodiment of the present application.

[0053] Explanation of the accompanying drawings: solid electrolyte preparation device 100; first pressure roller assembly 1; fourth roller 11; second blanking area 12; second pressure roller assembly 2; fifth roller 21; sixth roller 22; eighth roller 23; third blanking area 24; third pressure roller assembly 3; second roller 31; third roller 32; seventh roller 33; first blanking area 34; composite pressure roller assembly 4; first roller 41; thinning pressure roller assembly 5; unwinding assembly 6; winding assembly 7; first diaphragm a; second diaphragm b; first sub-diaphragm b1; second sub-diaphragm b2; first sub-composite diaphragm c; first composite diaphragm d; second composite diaphragm e; substrate f; first connecting line F; second connecting line H; third connecting line G; fourth connecting line Q. DETAILED DESCRIPTION

[0054] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0055] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0056] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0057] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0058] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0059] In the specification and claims of the present invention, references to features using the terms "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Furthermore, in the specification and claims, "and / or" refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0060] In the description of the present invention, it should be understood that the terms "axial", "radial", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0061] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0062] First, the horizontal and vertical directions mentioned in the embodiments of this application are shown in the attached Figure 1 、 Figure 2 and Figure 3 The marked direction, where the horizontal axis intersects the vertical axis.

[0063] Among them, if the solid electrolyte preparation device is placed on the ground, the horizontal axis is basically parallel to the ground; if the solid electrolyte preparation device is placed on a platform, the horizontal axis is basically parallel to the surface of the platform where the solid electrolyte preparation device is placed.

[0064] like Figure 1-Figure 3As shown, according to the first aspect of an embodiment of the present application, a solid electrolyte preparation device 100 is provided, comprising a first pressure roller assembly 1, a composite pressure roller assembly 4, a second pressure roller assembly 2 and an unwinding assembly 6; the composite pressure roller assembly 4 and the first pressure roller assembly 1 are arranged in a horizontal direction; the second pressure roller assembly 2 and the composite pressure roller assembly 4 are arranged in a vertical direction; the unwinding assembly 6 and the second pressure roller assembly 2 are arranged in a horizontal direction.

[0065] like Figure 1-Figure 3 As shown, the solid electrolyte preparation device 100 includes a first pressing roller assembly 1, a composite pressing roller assembly 4, a second pressing roller assembly 2 and an unwinding assembly 6; wherein, the first pressing roller assembly 1 is used to calender and convey the first membrane a to the composite pressing roller assembly 4, the second pressing roller assembly 2 is used to calender and convey the second membrane b or the first sub-membrane b1 to the composite pressing roller assembly 4, and the unwinding assembly 6 is used to release the substrate f to the composite pressing roller assembly 4; when the second pressing roller assembly 2 is used to calender and convey the second membrane b, the composite pressing roller assembly 4 is used to composite the first membrane a and the second membrane b together to form a first composite membrane d, and thin the first composite membrane d, and then composite the first composite membrane d with the substrate f to form a second composite membrane e.

[0066] Specifically, the first pressure roller assembly 1 and the composite pressure roller assembly 4 are arranged adjacent to each other in the horizontal direction, which facilitates the first pressure roller assembly 1 to convey the first film a to the composite pressure roller assembly 4; the second pressure roller assembly 2 and the composite pressure roller assembly 4 are arranged adjacent to each other in the vertical direction, and the second pressure roller assembly 2 and the first pressure roller assembly 1 are arranged at intervals in the horizontal direction, so that the first film a calendered and conveyed by the first pressure roller assembly 1 can be compounded with the second film b or the first sub-film b1 calendered and conveyed by the second pressure roller assembly 2; the unwinding assembly 6 and the second pressure roller assembly 2 are arranged horizontally, and in the vertical direction, the unwinding assembly 6 can be located below or above the composite pressure roller assembly 4, as long as the substrate f released by the unwinding assembly 6 can be compounded with the first composite film d through the composite pressure roller assembly 4 to form a second composite film e.

[0067] To further explain, after the composite pressure roller assembly 4 cooperates with the first pressure roller assembly 1 and the second pressure roller assembly 2 to composite the first diaphragm a and the second diaphragm b or the first sub-diaphragm b1 to form a first composite diaphragm d, the composite pressure roller assembly 4 will thin the first composite diaphragm d, and the thinned first composite diaphragm d will be composited with the substrate f released by the unwinding assembly 6 to form a second composite diaphragm e.

[0068] Therefore, the pressing roller device provided in the present application thins the first diaphragm a and the second diaphragm b or the first sub-diaphragm b1 together to form a first composite diaphragm d, thereby reducing the possibility of breakage when the first diaphragm a or the second diaphragm b or the first sub-diaphragm b1 is thinned to a preset thickness alone, thereby improving the quality of the first composite diaphragm d and the second composite diaphragm e; and compounding the first diaphragm a and the second diaphragm b or the first sub-diaphragm b1 together to form the first composite diaphragm d can also reduce the number of stacking times, thereby improving production efficiency; and can also improve the alignment of the first composite diaphragm d and the alignment accuracy, thereby improving production quality.

[0069] like Figure 1 As shown, in an optional embodiment, a winding assembly 7 is provided downstream of the composite pressure roller assembly 4, and the winding assembly 7 is used to wind up the first composite membrane sheet d.

[0070] like Figure 3 and Figure 5 As shown, in an embodiment in which the solid electrolyte preparation device 100 includes a first pressing roller assembly 1 and a second pressing roller assembly 2, the first pressing roller assembly 1 is used to calender and convey the first membrane a, the second pressing roller assembly 2 is used to calender and convey the second membrane b, and the composite pressing roller assembly 4 composites the first membrane a and the second membrane b to form a first composite membrane d, and composites the first composite membrane d with the substrate f to form a second composite membrane e.

[0071] like Figure 1 and Figure 2 As shown, in an optional embodiment, the solid electrolyte preparation device 100 includes at least one third press roller assembly 3, the third press roller assembly 3 and the second press roller assembly 2 are arranged in a horizontal direction, and the third press roller assembly 3 and the composite press roller assembly 4 are arranged in a vertical direction.

[0072] Among them, the solid electrolyte preparation device 100 includes at least one third pressure roller assembly 3, that is, the solid electrolyte preparation device 100 can include one third pressure roller assembly 3, two third pressure roller assemblies 3 or more third pressure roller assemblies 3, which can be set according to the number of layers of the required composite membrane.

[0073] like Figure 1 and Figure 2 As shown, the solid electrolyte preparation device 100 includes a third pressing roller assembly 3 as an example, that is, the solid electrolyte preparation device 100 includes a first pressing roller assembly 1, a second pressing roller assembly 2 and a third pressing roller assembly 3; specifically, the first pressing roller assembly 1 is used to calender and convey the first membrane a, the second pressing roller assembly 2 is used to calender and convey the first sub-membrane b1, and the third pressing roller assembly 3 is used to calender and convey the second sub-membrane b2.

[0074] Further explanation: the third pressure roller assembly 3 and the second pressure roller assembly 2 are arranged with an interval in the horizontal direction, and the third pressure roller assembly 3 and the composite pressure roller assembly 4 are arranged adjacent to each other in the vertical direction. The third pressure roller assembly 3 is farther away from the first pressure roller assembly 1 than the second pressure roller assembly 2. Therefore, the composite pressure roller assembly 4 can first composite the first diaphragm a and the first sub-diaphragm b1 to form a first sub-composite diaphragm c, and thin the first sub-composite diaphragm c, thereby avoiding the first diaphragm a or the first sub-diaphragm b1 from breaking when the first diaphragm a and / or the first sub-diaphragm b1 are thinned; the composite pressure roller assembly 4 then composites the thinned first sub-composite diaphragm c with the second sub-diaphragm b2 to form a first composite diaphragm d, and thins the first composite diaphragm d, and composites the thinned first composite diaphragm d with the substrate f to form a second composite diaphragm e.

[0075] In this embodiment, the second pressing roller assembly 2 and the third pressing roller assembly 3 are arranged at intervals in the horizontal direction, which can make the structure of the solid electrolyte preparation device 100 more compact, and the interval arrangement can make the first membrane a and the first sub-membrane b1 composite to form the first sub-composite membrane c, and then the first sub-composite membrane c can be thinned before being composited with the second sub-membrane b2, so as to improve production efficiency and production quality.

[0076] like Figure 1-Figure 3 As shown, in an optional embodiment, the composite pressing roller assembly 4 includes a plurality of first rollers 41, which are arranged in a horizontal direction. Specifically, a roller gap is formed between two adjacent first rollers 41, and the first film sheet a, the first sub-film sheet b1, the second sub-film sheet b2, the second film sheet b, the first sub-composite film sheet c, the first composite film sheet d, and / or the second composite film sheet e pass through the roller gap between different adjacent first rollers 41 according to the composite step. The axis of the first roller 41 intersects with the horizontal axis, and the axis of the first roller 41 intersects with the vertical axis.

[0077] It is further explained that the second pressure roller assembly 2 and the third pressure roller assembly 3 are respectively arranged adjacent to different first rollers 41; the second pressure roller assembly 2 and the third pressure roller assembly 3 are arranged at intervals in the horizontal direction, and the second pressure roller assembly 2 and the third pressure roller assembly 3 are arranged adjacent to different first rollers 41.

[0078] In a specific embodiment, the second pressing roller assembly 2 and the third pressing roller assembly 3 are arranged adjacent to two adjacent first rollers 41 .

[0079] like Figure 1 and Figure 2As shown, in another specific embodiment, there is at least one first roller 41 between the second pressure roller assembly 2 and the third pressure roller assembly 3; specifically, there can be one first roller 41, two first rollers 41 or more first rollers 41 between the second pressure roller assembly 2 and the third pressure roller assembly 3, and the number of first rollers 41 between the second pressure roller assembly 2 and the third pressure roller assembly 3 can be adjusted according to the roller gap spacing between two adjacent first rollers 41 to thin the first sub-composite membrane c; and it can also avoid the second pressure roller assembly 2 and the third pressure roller assembly 3 from abutting against each other to avoid mutual influence.

[0080] like Figure 1 and Figure 2 As shown, in an optional embodiment, the third pressure roller assembly 3 includes a second roller 31 and a third roller 32, and the third roller 32 and the first roller 41 are arranged in a vertical direction; specifically, in the vertical direction, the third roller 32 is located above the first roller 41, and the axis of the third roller 32 is parallel to the axis of the first roller 41.

[0081] Among them, the third roller 32 can be in contact with the first roller 41, and a roller gap is formed between the first roller 41 and the third roller 32; or, the third pressure roller assembly 3 also includes at least one seventh roller 33, the seventh roller 33 is arranged between the third roller 32 and the first roller 41, and the seventh roller 33 forms a roller gap with the first roller 41 and the third roller 32 respectively, which can transport and thin the second sub-membrane b2.

[0082] To further illustrate, the line connecting the center of the second roller 31 and the center of the third roller 32 is the first line F; the line connecting the center of the third roller 32 and the center of the first roller 41 is the second line H; an angle M is formed between the first line F and the second line H, 90°≥M≥0°; specifically, the center of the second roller 31 refers to the center of the radial cross-section of the second roller 31, the center of the third roller 32 refers to the center of the radial cross-section of the third roller 32, and the line between the center of the second roller 31 and the center of the third roller 32 is the first line F; the center of the first roller 41 refers to the center of the radial cross-section of the first roller 41, the line connecting the center of the first roller 41 and the center of the third roller 32 is the second line H, and an angle M is formed between the first line F and the second line H.

[0083] In a specific embodiment, M is 90°; in this embodiment, the second roller 31 and the third roller 32 are arranged in the horizontal direction, and the second roller 31 is located on the side of the third roller 32 away from the second pressing roller assembly 2, so as to avoid the second roller 31 and the second pressing roller assembly 2 from abutting each other to avoid mutual influence; the third roller 32 and the second roller 31 are arranged in the horizontal direction, and a first blanking area 34 is formed between the surface of the second roller 31 and the surface of the third roller 32. In the vertical direction, the first blanking area 34 faces upward, and the first blanking area 34 is used to accommodate powder. The second roller 31 and the third roller 32 can press the powder into a second sub-diaphragm b2.

[0084] like Figure 1 and Figure 2 As shown, in another specific embodiment, 90°>M>0°; wherein, a first blanking area 34 is formed between the surface of the second roller 31 and the surface of the third roller 32, and in the vertical direction, the first blanking area 34 faces obliquely upward, and the first blanking area 34 is used to accommodate powder, and the second roller 31 and the third roller 32 can roll the powder into a second sub-diaphragm b2; in this embodiment, while being able to form the first blanking area 34 between the second roller 31 and the third roller 32, the structure of the solid electrolyte preparation device 100 can also be made more compact,

[0085] In another specific embodiment, M is 0°; that is, the second roller 31 and the third roller 32 are arranged in a vertical direction. In this embodiment, the third pressing roller assembly 3 is suitable for conveying and calendering the second sub-membrane b.

[0086] like Figure 1 、 Figure 2 and Figure 3 As shown, in an optional embodiment, the composite pressing roller assembly 4 includes a plurality of first rollers 41, which are arranged in a horizontal direction. Specifically, a roller gap is formed between two adjacent first rollers 41, and the first film sheet a, the first sub-film sheet b1, the second sub-film sheet b2, the second film sheet b, the first sub-composite film sheet c, the first composite film sheet d, and / or the second composite film sheet e pass through the roller gap between different adjacent first rollers 41 according to the composite step. The axis of the first roller 41 intersects with the horizontal axis, and the axis of the first roller 41 intersects with the vertical axis.

[0087] It is further explained that the first pressing roller assembly 1 includes at least two fourth rollers 11, and the two fourth rollers 11 and the multiple first rollers 41 are arranged in a horizontal direction; wherein, the first pressing roller assembly 1 may include two fourth rollers 11, three fourth rollers 11 or more fourth rollers 11; in this embodiment, the first pressing roller assembly 1 is taken as an example to include two fourth rollers 11, specifically, the two fourth rollers 11 are arranged in a horizontal direction, and a second blanking area 12 is formed between the two fourth rollers 11, and the second blanking area 12 is facing upward in the vertical direction. The second blanking area 12 is used to accommodate powder, and the two fourth rollers 11 can press the powder into a first membrane a; the fourth roller 11 of the first pressing roller assembly 1 close to the composite pressing roller assembly 4 is in contact with the first roller 41 of the composite pressing roller assembly 4 close to the first pressing roller assembly 1, and a roller gap is formed between the fourth roller 11 and the first roller 41, and the first membrane a passes through the roller gap, which can thin the first membrane a.

[0088] like Figure 1 、 Figure 2 and Figure 3 As shown, in an optional embodiment, the second pressure roller assembly 2 includes a fifth roller 21 and a sixth roller 22, and the sixth roller 22 is arranged in a vertical direction with the first roller 41; specifically, in the vertical direction, the sixth roller 22 is located above the first roller 41, and the axis of the sixth roller 22 is parallel to the axis of the first roller 41.

[0089] Among them, the sixth roller 22 can be in contact with the first roller 41, and a roller gap is formed between the first roller 41 and the sixth roller 22; or, the second pressure roller assembly 2 also includes at least one eighth roller 23, the eighth roller 23 is arranged between the sixth roller 22 and the first roller 41, and the eighth roller 23 forms a roller gap with the first roller 41 and the eighth roller 23 respectively, which can transport and thin the first sub-membrane b1 or the second membrane b.

[0090] To further illustrate, the line connecting the center of the fifth roller 21 and the center of the sixth roller 22 is the third line G; the line connecting the center of the sixth roller 22 and the center of the first roller 41 is the fourth line Q; an angle K is formed between the third line G and the fourth line Q, 90°≥K≥0°; specifically, the center of the fifth roller 21 refers to the center of the radial section of the fifth roller 21, the center of the sixth roller 22 refers to the center of the radial section of the sixth roller 22, and the line between the center of the fifth roller 21 and the center of the sixth roller 22 is the third line G; the center of the first roller 41 refers to the center of the radial section of the first roller 41, the line connecting the center of the first roller 41 and the center of the sixth roller 22 is the fourth line Q, and an angle K is formed between the third line G and the fourth line Q.

[0091] In a specific embodiment, K is 90°; in this embodiment, the fifth roller 21 and the sixth roller 22 are arranged in the horizontal direction, and the fifth roller 21 is located on the side of the sixth roller 22 away from the third pressing roller assembly 3, so as to avoid the fifth roller 21 and the third pressing roller assembly 3 from abutting each other to avoid mutual influence; the fifth roller 21 and the sixth roller 22 are arranged in the horizontal direction, and a third blanking area 24 is formed between the surface of the fifth roller 21 and the surface of the sixth roller 22. In the vertical direction, the third blanking area 24 faces upward, and the third blanking area 24 is used to accommodate powder. The fifth roller 21 and the sixth roller 22 can press the powder into the first sub-diaphragm b1 or the second diaphragm b.

[0092] like Figure 1 、 Figure 2 and Figure 3 As shown, in another specific embodiment, 90°>K>0°; wherein, a third blanking area 24 is formed between the surface of the fifth roller 21 and the surface of the sixth roller 22, and in the vertical direction, the third blanking area 24 faces obliquely upward, and the third blanking area 24 is used to accommodate powder, and the fifth roller 21 and the sixth roller 22 can press the powder into a first sub-diaphragm b1 or a second diaphragm b; in this embodiment, while being able to form the third blanking area 24 between the fifth roller 21 and the sixth roller 22, the structure of the solid electrolyte preparation device 100 can also be made more compact.

[0093] In another specific embodiment, K is 0°; that is, the fifth roller 21 and the sixth roller 22 are arranged in the vertical direction. In this embodiment, the second pressing roller assembly 2 is suitable for conveying and calendering the first sub-membrane b1 or the second membrane b.

[0094] like Figure 1 As shown, in an optional embodiment, the solid electrolyte preparation device 100 further includes a thinning roller assembly 5, which is arranged adjacent to the composite roller assembly 4 on a side away from the first roller assembly 1; specifically, the thinning roller assembly 5 is used to thin the second composite membrane e, and when the first membrane a, the second membrane b, the first sub-membrane b1 or the second sub-membrane b2 in the second composite membrane e do not reach a preset thickness, the second composite membrane e is thinned by the thinning roller assembly 5, so that the first membrane a, the second membrane b, the first sub-membrane b1 or the second sub-membrane b2 reach a preset thickness; in this embodiment, the second composite membrane e is thinned by the thinning roller assembly 5, so that the first membrane a, the second membrane b, the first sub-membrane b1 or the second sub-membrane b2 can reach a thinner thickness, and can avoid breakage during thinning.

[0095] In an embodiment where the solid electrolyte preparation device 100 includes a winding assembly 7 , the thinning roller assembly 5 is disposed between the winding assembly 7 and the composite roller assembly 4 , and the winding assembly 7 is used to wind up the first composite membrane d thinned by the thinning roller assembly 5 .

[0096] According to a second aspect of an embodiment of the present application, a method for preparing a solid electrolyte is provided, the method comprising:

[0097] S1, the first pressing roller assembly 1 calenders and conveys the first film a to the composite pressing roller assembly 4;

[0098] S2, calendering and conveying the second film b to the composite pressing roller assembly 4;

[0099] S3, combining the first membrane a and the second membrane b to form a first composite membrane d, and thinning the first composite membrane d;

[0100] S4. The composite pressing roller assembly 4 composites the first composite film d and the substrate f to form a second composite film e.

[0101] The preparation method may adopt the above-mentioned solid electrolyte preparation device 100 .

[0102] like Figure 1-Figure 3 As shown, the first pressing roller assembly 1 is used to calender and convey the first film a to the composite pressing roller assembly 4, and to calender and convey the second film b to the composite pressing roller assembly 4. The composite pressing roller assembly 4 cooperates with the first pressing roller assembly 1 and / or the second pressing roller assembly 2 to composite the first film a and the second film b to form a first composite film d. After the composite pressing roller assembly 4 thins the first composite film d, the thinned first composite film d is composited with the substrate f to form a second composite film e.

[0103] In an embodiment in which the solid electrolyte preparation device 100 includes a first pressing roller assembly 1 and a second pressing roller assembly 2 , in S2 , the second pressing roller assembly 2 is used to calender and convey the second membrane b to the composite pressing roller assembly 4 .

[0104] like Figure 5As shown, in an embodiment of a solid electrolyte preparation device 100 including a first pressing roller assembly 1 and a second pressing roller assembly 2, the first membrane a is an electrode membrane, and the second membrane b is an electrolyte membrane; in this embodiment, the electrolyte membrane needs to be thinned. If the electrolyte membrane is thinned alone, the electrolyte membrane will break, so the electrode membrane and the electrolyte membrane are first compounded together to form a first composite membrane d, and then the first composite membrane d is thinned to make the thickness of the electrolyte membrane reach a preset thickness. Since the electrode membrane has a certain thickness, the electrolyte membrane can be prevented from breaking; and the number of stacking times can be reduced, thereby improving production efficiency; and the alignment of the electrode membrane and the electrolyte membrane can be improved, and the alignment accuracy can be improved, thereby improving production quality.

[0105] In an embodiment where the solid electrolyte preparation device 100 includes a first pressing roller assembly 1, a second pressing roller assembly 2 and a third pressing roller assembly 3, the second membrane b includes a first sub-membrane b1 and a second sub-membrane b2;

[0106] The S2 includes:

[0107] The second pressing roller assembly 2 calenders and conveys the first sub-membrane b1 to the composite pressing roller assembly 4;

[0108] The third pressing roller assembly 3 calenders and conveys the second sub-membrane b2 to the composite pressing roller assembly 4;

[0109] The S3 includes:

[0110] Composite the first membrane a and the first sub-membrane b1 to form a first sub-composite membrane c, and thin the first sub-composite membrane c;

[0111] The first sub-composite membrane c and the second sub-membrane b2 are then combined to form the first composite membrane d.

[0112] like Figure 4As shown, in an embodiment of a solid electrolyte preparation device 100 including a first pressing roller assembly 1, a second pressing roller assembly 2 and a third pressing roller assembly 3, the first membrane a is an electrode membrane, the first sub-membrane b1 is an electrolyte membrane, and the second sub-membrane b2 is an electrolyte membrane; in this embodiment, it is necessary to thin the thickness of the electrolyte membrane. If the electrolyte membrane is thinned alone, the electrolyte membrane may break, so the first membrane a and the first sub-membrane b1 are first composited together to form a first sub-composite membrane c, and then the first sub-composite membrane c is thinned, and then the first sub-composite membrane c and the second sub-membrane b2 are composited together to form a first composite membrane d, and then the first composite membrane d is thinned so that the thickness of the first sub-membrane b1 and the second sub-membrane b2 reaches a preset thickness. Since the electrode membrane has a certain thickness, the electrolyte membrane can be prevented from breaking; the number of laminations can be reduced, thereby improving production efficiency; the alignment of the electrode membrane and the electrolyte membrane can be improved, the alignment accuracy is improved, and thus the production quality can be improved.

[0113] like Figure 6 As shown, in another embodiment of a solid electrolyte preparation device 100 including a first pressing roller assembly 1, a second pressing roller assembly 2 and a third pressing roller assembly 3, the first membrane a is an electrode membrane, the first sub-membrane b1 is an electrode membrane, and the second sub-membrane b2 is an electrolyte membrane; in this embodiment, it is necessary to thin the thickness of the electrolyte membrane. If the electrolyte membrane is thinned alone, the electrolyte membrane will break, so the first membrane a and the first sub-membrane b1 are first compounded together to form a first sub-composite membrane c, and then the first sub-composite membrane c and the second sub-membrane b2 are compounded together to form a first composite membrane d, and then the first composite membrane d is thinned so that the thickness of the second sub-membrane b2 reaches a preset thickness. Since the electrode membrane has a certain thickness, the electrolyte membrane can be prevented from breaking; the number of stacking times can also be reduced, thereby improving production efficiency; the alignment of the electrode membrane and the electrolyte membrane can also be improved, the alignment accuracy is improved, and thus the production quality can be improved.

[0114] In an optional embodiment, the substrate f is a current collector; in this embodiment, the first composite membrane d is composited with the current collector, and there is no need to laminate the first composite membrane d with the current collector separately, thereby reducing the process steps and improving work efficiency.

[0115] In another optional embodiment, the substrate f is a release film; in this embodiment, the first composite film d is composited with the release film, and subsequently the first composite film d can be composited with other films or foils as needed, and the release film can be peeled off after composited.

[0116] Among them, the release film can be made of PET or PP material.

[0117] In an optional embodiment, the preparation method further comprises:

[0118] S5. Thinning the second composite membrane e; specifically, in this embodiment, the second composite membrane e is thinned by the thinning roller assembly 5, so that the first membrane a, the second membrane b, the first sub-membrane b1 or the second sub-membrane b2 reach a preset thickness; in this embodiment, thinning the second composite membrane e by the thinning roller assembly 5 can enable the first membrane a, the second membrane b, the first sub-membrane b1 or the second sub-membrane b2 to reach a thinner thickness, and can avoid breakage during thinning.

[0119] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A solid electrolyte preparation device, characterized in that: include: a first pressure roller assembly; A composite pressure roller assembly, wherein the composite pressure roller assembly and the first pressure roller assembly are arranged in a horizontal direction; a second pressing roller assembly, wherein the second pressing roller assembly and the composite pressing roller assembly are arranged in a vertical direction; An unwinding assembly, wherein the unwinding assembly and the second pressing roller assembly are arranged in a horizontal direction.

2. The solid electrolyte preparation device according to claim 1, characterized in that: The solid electrolyte preparation device includes at least one third press roller assembly, the third press roller assembly and the second press roller assembly are arranged with spacing in the horizontal direction, and the third press roller assembly and the composite press roller assembly are arranged in the vertical direction.

3. The solid electrolyte preparation device according to claim 2, characterized in that: The composite pressing roller assembly includes a plurality of first rollers, and the plurality of first rollers are arranged in a horizontal direction; The second pressing roller assembly and the third pressing roller assembly are respectively arranged adjacent to different first rollers.

4. The solid electrolyte preparation device according to claim 3, characterized in that: There is at least one first roller between the second pressing roller assembly and the third pressing roller assembly.

5. The solid electrolyte preparation device according to claim 3, characterized in that: The third pressing roller assembly includes a second roller and a third roller, and the third roller and the first roller are arranged in a vertical direction; A line connecting the center of the second roller and the center of the third roller is a first connecting line; A line connecting the center of the third roller and the center of the first roller is a second connecting line; An angle M is formed between the first connecting line and the second connecting line, and 90°≥M≥0°.

6. The solid electrolyte preparation device according to claim 1, characterized in that: The composite pressing roller assembly includes a plurality of first rollers, and the plurality of first rollers are arranged in a horizontal direction; The first pressing roller assembly includes at least two fourth rollers, and the two fourth rollers and the plurality of first rollers are arranged in a horizontal direction.

7. The solid electrolyte preparation device according to claim 6, characterized in that: The second pressing roller assembly includes a fifth roller and a sixth roller, and the sixth roller and the first roller are arranged in a vertical direction; The line connecting the center of the fifth roller and the center of the sixth roller is the third connecting line; A line connecting the center of the sixth roller and the center of the first roller is a fourth line; An angle K is formed between the third connecting line and the fourth connecting line, and 90°≥K≥0°.

8. The solid electrolyte preparation device according to claim 1, characterized in that: The solid electrolyte preparation device further includes a thinning press roller assembly, which is arranged adjacent to a side of the composite press roller assembly away from the first press roller assembly.

9. A method for preparing a solid electrolyte, characterized in that: The preparation method comprises: S1, the first pressing roller assembly calenders and conveys the first film to the composite pressing roller assembly; S2, calendaring and conveying the second film to the composite pressing roller assembly; S3, combining the first membrane and the second membrane to form a first composite membrane, and thinning the first composite membrane; S4. The composite pressing roller assembly composites the first composite film and the substrate to form a second composite film.

10. The preparation method according to claim 9, characterized in that In S2, the second pressing roller assembly calenders and conveys the second film to the composite pressing roller assembly.

11. The preparation method according to claim 10, characterized in that: The first membrane is an electrode membrane, and the second membrane is an electrolyte membrane.

12. The preparation method according to claim 9, characterized in that The second diaphragm includes a first sub-diaphragm and a second sub-diaphragm; The S2 includes: A second pressing roller assembly calenders and conveys the first sub-film to the composite pressing roller assembly; A third pressing roller assembly calenders and conveys the second sub-film to the composite pressing roller assembly; The S3 includes: Composite the first membrane and the first sub-membrane to form a first sub-composite membrane, and thin the first sub-composite membrane; The first sub-composite membrane and the second sub-membrane are then combined to form the first composite membrane.

13. The preparation method according to claim 12, characterized in that The first membrane is an electrode membrane, the first sub-membrane is an electrolyte membrane, and the second sub-membrane is an electrolyte membrane; or The first membrane is an electrode membrane, the first sub-membrane is an electrode membrane, and the second sub-membrane is an electrolyte membrane.

14. The preparation method according to claim 9, characterized in that The substrate is a current collector or a release film.

15. The preparation method according to claim 9, characterized in that The preparation method further comprises: S5. Thinning the second composite membrane.

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