A solid-state electrolyte preparation device

Abstract

The utility model discloses a solid electrolyte preparation device, include: first compression roller subassembly, first compression roller subassembly includes a plurality of first roller, interval arrangement is arranged to two first roller adjacently, second compression roller subassembly, second compression roller subassembly includes a plurality of second roller, interval arrangement is arranged to two second roller adjacently, third compression roller subassembly, third compression roller subassembly includes a plurality of third roller, interval arrangement is arranged to two third roller adjacently, fourth compression roller subassembly, fourth compression roller subassembly includes a plurality of fourth roller, interval arrangement is arranged to two fourth roller adjacently, first compression roller subassembly, second compression roller subassembly and third compression roller subassembly along with the same fourth roller's circumferential interval arrangement.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a solid electrolyte preparation apparatus. Background Technology

[0002] In the production and manufacturing of solid-state lithium batteries, the inherent characteristics of dry electrode technology (solvent-free, highly elastic, highly dense, and highly compatible) are highly compatible with solid-state battery technology.

[0003] In related technologies, dry processes typically prepare electrolyte membranes as single membranes, which require a relatively thin membrane. During the thinning process, the membrane may break, thus failing to meet the requirements for electrolyte membrane thickness in high-energy-density solid-state batteries. Utility Model Content

[0004] The purpose of this application is to provide a solid electrolyte preparation apparatus.

[0005] According to a first aspect of the embodiments of this application, a solid electrolyte preparation apparatus is provided, comprising:

[0006] A first pressure roller assembly, comprising a plurality of first rollers, wherein two adjacent first rollers are spaced apart;

[0007] The second pressure roller assembly includes a plurality of second rollers, with adjacent second rollers spaced apart.

[0008] The third pressure roller assembly includes a plurality of third rollers, with adjacent third rollers spaced apart.

[0009] The fourth pressure roller assembly includes a plurality of fourth rollers, with adjacent fourth rollers spaced apart.

[0010] The first pressure roller assembly, the second pressure roller assembly, and the third pressure roller assembly are arranged circumferentially at intervals along the same fourth roller.

[0011] Optionally, the first roller of the first pressure roller assembly is spaced apart from the fourth roller of the fourth pressure roller assembly;

[0012] The second roller of the second pressure roller assembly is positioned at a distance from the fourth roller of the fourth pressure roller assembly;

[0013] The third roller of the third pressure roller assembly is positioned close to the fourth roller assembly and is spaced apart from the fourth roller.

[0014] Optionally, the line connecting the center of the first roller and the center of the fourth roller is the first connecting line;

[0015] The line connecting the center of the third roller and the center of the fourth roller is the second line;

[0016] An angle M is formed between the first line and the second line, where 180° ≥ M > 0°.

[0017] Optionally, the second pressure roller assembly is located between the first pressure roller assembly and the third pressure roller assembly;

[0018] The line connecting the center of the second roller and the center of the fourth roller is the third line;

[0019] The third line forms an angle K with the first line, where 90° ≥ K > 0°;

[0020] The third line and the second line form an angle N, where 90° ≥ N > 0°.

[0021] Optionally, the second pressure roller assembly is located between the first pressure roller assembly and the third pressure roller assembly;

[0022] The line connecting the center of the second roller of the second pressure roller assembly, which is close to the center of the fourth roller assembly, and the center of the fourth roller is a third line, which is parallel to the vertical axis.

[0023] The line connecting the center of the second roller of the second pressure roller assembly away from the center of the second roller assembly and the center of the adjacent second roller is the fourth connecting line. The fourth connecting line and the third connecting line form an angle W, where 90° ≥ W > 0°.

[0024] Optionally, the second roller of the second pressure roller assembly is located away from the fourth pressure roller assembly and close to the third pressure roller assembly. The number of the first rollers is G, and the number of the second rollers is nG-1 or nG+1, where n is a positive integer.

[0025] Optionally, the second roller of the second pressure roller assembly is located away from the fourth pressure roller assembly and close to the first pressure roller assembly. The number of the third rollers is P, and the number of the second rollers is nP-1 or nP+1, where n is a positive integer.

[0026] Optionally, the solid electrolyte preparation apparatus further includes an unwinding assembly, which is arranged at an interval from the fourth pressure roller assembly.

[0027] Optionally, the solid electrolyte preparation apparatus further includes a thinning pressure roller assembly, which is located downstream of the fourth pressure roller assembly.

[0028] Optionally, the diameter of the fourth roller is larger than the diameter of the first roller, the diameter of the fourth roller is larger than the diameter of the second roller, and the diameter of the fourth roller is larger than the diameter of the third roller.

[0029] One technical advantage of this application embodiment is that by combining the first film, the second film, and the third film into a second composite film and thinning them through the first pressure roller assembly, the second pressure roller assembly, the third pressure roller assembly, and the fourth pressure roller assembly, the breakage situation when the first film, the second film, or the third film is individually thinned to a preset thickness can be reduced, thereby improving the quality of the second composite film.

[0030] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0032] Figure 1 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the third composite membrane structure in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the third composite membrane structure in the embodiments of this application.

[0037] Explanation of reference numerals in the attached drawings: Solid electrolyte preparation apparatus 100; First pressure roller assembly 1; First roller 11; First sub-roller 11a; Second feeding zone 12; Second pressure roller assembly 2; Second roller 21; Second sub-roller 21a; First feeding zone 22; Third pressure roller assembly 3; Third roller 31; Third sub-roller 31a; Third feeding zone 32; Fourth pressure roller assembly 4; Fourth roller 41; Unwinding assembly 5; Rewinding assembly 6; Thinning pressure roller assembly 7; First membrane a; Second membrane b; Third membrane c; First composite membrane d; Second composite membrane e; Substrate f; Third composite membrane h; First connecting line A; Second connecting line B; Third connecting line C; Fourth connecting line D. Detailed Implementation

[0038] 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 arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0041] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0043] In the specification and claims of this invention, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] In the description of this invention, it should be understood that if the terms "axial", "radial", etc., are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] First, it should be noted that the horizontal and vertical directions mentioned in the embodiments of this application are referred to in the appendix. Figure 1 , Figure 2 and Figure 3 The marked directions. Among them, the horizontal axis intersects the vertical axis.

[0047] If the solid electrolyte preparation device is placed on the ground, its horizontal axis is basically parallel to the ground; if the solid electrolyte preparation device is placed on a platform, its horizontal axis is basically parallel to the surface of the platform on which the solid electrolyte preparation device is placed.

[0048] like Figures 1-5 As shown, according to a first aspect of the embodiments of this application, a solid electrolyte preparation apparatus 100 is provided, including a first pressure roller assembly 1, a second pressure roller assembly 2, a third pressure roller assembly 3, and a fourth pressure roller assembly 4; the first pressure roller assembly 1 includes a plurality of first rollers 11, with adjacent first rollers 11 spaced apart; the second pressure roller assembly 2 includes a plurality of second rollers 21, with adjacent second rollers 21 spaced apart; the third pressure roller assembly 3 includes a plurality of third rollers 31, with adjacent third rollers 31 spaced apart; the fourth pressure roller assembly 4 includes a plurality of fourth rollers 41, with adjacent fourth rollers 41 spaced apart; the first pressure roller assembly 1, the second pressure roller assembly 2, and the third pressure roller assembly 3 are arranged circumferentially spaced along the same fourth roller 41.

[0049] like Figures 1-3 As shown, the solid electrolyte preparation apparatus 100 includes a first pressure roller assembly 1, a second pressure roller assembly 2, a third pressure roller assembly 3, and a fourth pressure roller assembly 4; wherein, the first pressure roller assembly 1 is used for calendering and conveying a first film a, the second pressure roller assembly 2 is used for calendering and conveying a second film b, the third pressure roller assembly 3 is used for calendering and conveying a third film c, the fourth pressure roller assembly 4 cooperates with the second pressure roller assembly 2 to combine the first film a and the second film b together to form a first composite film d and to thin the first composite film d, and the fourth pressure roller assembly 4 cooperates with the third pressure roller assembly 3 to combine the first composite film d and the third film c together to form a second composite film e and to thin the second composite film e.

[0050] Further explanation: the first pressure roller assembly 1 includes a plurality of first rollers 11, which are spaced apart and used to transport a first diaphragm a. By adjusting the gap between two adjacent first rollers 11, the first diaphragm a can be thinned. The second pressure roller assembly 2 includes a plurality of second rollers 21, which are used to transport a second diaphragm b. By adjusting the gap between two adjacent second rollers 21, the second diaphragm b can be thinned. The third pressure roller assembly 3 includes a plurality of third rollers 31, which are used to transport a third diaphragm c. By adjusting the gap between two adjacent third rollers 31, the third diaphragm c can be thinned.

[0051] Further explanation: the fourth pressure roller assembly 4 includes a plurality of fourth rollers 41, which are spaced apart; wherein, the first pressure roller assembly 1, the second pressure roller assembly 2, and the third pressure roller assembly 3 are spaced apart circumferentially along the same fourth roller 41; the plurality of first rollers 11 can transport the first film a to the fourth pressure roller assembly 4, the plurality of second rollers 21 can transport the second film b to the fourth pressure roller assembly 4, and the plurality of third rollers 31 can transport the third film c to the fourth pressure roller assembly 4, thereby combining the first film a, the second film b, and the third film c together to form a second composite film e, and thinning the second composite film e.

[0052] Therefore, the solid electrolyte preparation apparatus 100 provided in this application, by thinning the first composite membrane d formed by combining the first membrane a and the second membrane b together, and then thinning the first composite membrane d together with the third membrane c to form the second composite membrane e, can reduce the possibility of breakage when the first membrane a, the second membrane b, or the third membrane c are individually thinned to a preset thickness, thereby improving the quality of the first composite membrane d and the second composite membrane. Furthermore, by combining the first membrane a, the second membrane b, and the third membrane c together to form the second composite membrane e, the number of stacking steps can be reduced, thereby improving production efficiency. In addition, the alignment of the second composite membrane e can be improved, and the alignment accuracy can be increased, thereby improving production quality.

[0053] like Figures 1-3As shown, in an optional embodiment, the first roller assembly 1 is spaced apart from the fourth roller assembly 4 by a first roller 11 near the fourth roller assembly 4; the second roller assembly 2 is spaced apart from the fourth roller assembly 4 by a second roller 21 near the fourth roller assembly 4; and the third roller assembly 3 is spaced apart from the fourth roller assembly 4 by a third roller 31 near the fourth roller assembly 4. Specifically, the first roller 11 of the first roller assembly 1 near the fourth roller assembly 4 is a first sub-roller 11a, which is spaced apart from the fourth roller 41; the second roller 21 of the second roller assembly 2 near the fourth roller assembly 4 is a second sub-roller 21a; the second sub-roller is spaced apart from the fourth roller 41; and the third roller assembly 3 is spaced apart from the fourth roller assembly 4 by a third roller 31. 1 is a third sub-roller 31a, which is spaced apart from the fourth roller 41; wherein, the first sub-roller 11a, the second sub-roller 21a and the third sub-roller 31a are spaced apart circumferentially along the same fourth roller 41; multiple first rollers 11 can transport the first film a to the fourth pressure roller assembly 4, multiple second rollers 21 can transport the second film b to the fourth pressure roller assembly 4, and the fourth roller 41 can combine the first film a and the second film b together with the first roller 11 and the second roller 21 to form a first composite film d; multiple third rollers 31 can transport the third film c to the fourth pressure roller assembly 4, and the fourth roller 41 and the third roller 31 can combine the first composite film d and the third film c together to form a second composite film e, and thin the second composite film e.

[0054] like Figure 1 and Figure 3As shown, in an optional embodiment, the line connecting the center of the first roller 11 and the center of the fourth roller 41 is the first connecting line A; the line connecting the center of the third roller 31 and the center of the fourth roller 41 is the second connecting line B; the first connecting line A and the second connecting line B form an angle M, 180° ≥ M > 0°; specifically, the center of the first roller 11 is the center of the radial section of the first roller 11, the center of the third roller 31 is the center of the radial section of the third roller 31, and the center of the fourth roller 41 is the center of the radial section of the fourth roller 41; the line connecting the center of the first roller 11 and the center of the fourth roller 41, the first connecting line A, can be understood as the line connecting the center of the first sub-roller 11a and the center of the fourth roller 41, or the line connecting the center of any one of the first roller 11 and the center of the fourth roller 41, or... The first line A is a straight line connecting the center of the first roller 11 and the center of the fourth roller 41. The second line B is a straight line connecting the center of the third roller 31 and the center of the fourth roller 41. It can be understood as the line connecting the center of the third sub-roller 31a and the center of the fourth roller 41, or the line connecting the center of any one of the third roller 31 and the center of the fourth roller 41, or the line connecting the centers of multiple third rollers 31 and the center of the fourth roller 41. The second line B is a straight line. The first line A and the second line B form an angle M, where 180° ≥ M > 0°. In the vertical direction, the first pressure roller assembly 1 and the third pressure roller assembly 3 are located above the fourth pressure roller assembly 4. Within the range of 180° ≥ M > 0°, it is convenient to install the first pressure roller assembly 1 and the second pressure roller assembly 2, and it can make the structure of the solid electrolyte preparation device 100 more compact.

[0055] like Figure 1 and Figure 2As shown, in an optional embodiment, the second pressure roller assembly 2 is located between the first pressure roller assembly 1 and the third pressure roller assembly 3; the line connecting the center of the second roller 21 and the center of the fourth roller 41 is the third connecting line C; the third connecting line C and the first connecting line A form an angle K, 90°≥K>0°; the third connecting line C and the second connecting line B form an angle N, 90°≥N>0°. Specifically, the center of the second roller 21 is the center of the radial section of the second roller 21; the line connecting the center of the second roller 21 and the center of the fourth roller 41 is the third connecting line C, which can be understood as the line connecting the center of the second sub-roller 21a and the center of the fourth roller 41, or the line connecting the center of any one of the second rollers 21 and the center of the fourth roller 41, or the line connecting the centers of multiple second rollers 21 and the center of the fourth roller 41, and the third connecting line C is a straight line; wherein, the third connecting line C and the first connecting line A form an angle K, 90°≥K>0°, and the third connecting line C and the second connecting line B form an angle N, 90°≥K>0°, so as to facilitate the arrangement and installation of the first pressure roller assembly 1, the second pressure roller assembly 2 and the third pressure roller assembly 3, and to make the structure of the solid electrolyte preparation device 100 more compact.

[0056] like Figures 1-3 As shown, in an optional embodiment, the second pressure roller assembly 2 is located between the first pressure roller assembly 1 and the third pressure roller assembly 3; the line connecting the center of the second roller 21 of the second pressure roller assembly 2 near the center of the fourth roller 41 is a third connecting line C, which is parallel to the vertical axis; that is, the line connecting the center of the second sub-roller 21a and the center of the fourth roller 41 is a third connecting line C, which is parallel to the vertical axis.

[0057] To further explain, the line connecting the center of the second roller 21 of the second pressure roller assembly 2 away from the fourth pressure roller assembly 4 and the center of the adjacent second roller 21 is the fourth connecting line D. The fourth connecting line D and the third connecting line C form an angle W, where 90° ≥ W > 0°. Specifically, the line connecting two adjacent second rollers 21 of the second pressure roller assembly 2 away from the fourth pressure roller assembly 4 is the fourth connecting line D. The fourth connecting line D and the third connecting line C form an angle W, where 90° ≥ W > 0°. In this embodiment, a first material dropping area 22 is formed between two adjacent second rollers 21 of the second pressure roller assembly 2 away from the fourth pressure roller assembly 4. The first material dropping area 22 is used to place powder. The first material dropping area 22 faces upward or diagonally upward, thereby preventing powder from falling.

[0058] In one alternative embodiment, a second dropping area 12 is formed between two adjacent first rollers 11 of the first pressure roller assembly 1 away from the fourth pressure roller assembly 4. The second dropping area 12 is used to place powder, and the second dropping area 12 faces upward or diagonally upward, thereby preventing powder from falling.

[0059] In one alternative embodiment, a third dropping area 32 is formed between two adjacent third rollers 31 of the third pressure roller assembly 3 away from the fourth pressure roller assembly 4. The third dropping area 32 is used to place powder, and the third dropping area 32 faces upward or diagonally upward, thereby preventing powder from falling.

[0060] In an optional embodiment, the second roller 21 of the second pressure roller assembly 2, which is away from the fourth pressure roller assembly 4, is close to the third pressure roller assembly 3. The number of the first rollers 11 is G, and the number of the second rollers 21 is nG-1 or nG+1, where n is a positive integer. Specifically, a first material dropping area 22 is formed between two adjacent second rollers 21 of the second pressure roller assembly 2, which are away from the fourth pressure roller assembly 4. The first material dropping area 22 faces the side of the first pressure roller assembly 1. In this embodiment, the number of the first rollers 11 is G, and the number of the second rollers 21 is nG-1 or nG+1, so that the first diaphragm a and the second diaphragm b can be combined together, and the mutual influence between the first diaphragm a and the second diaphragm b can be avoided. For example, when n=1 and G=4, the number of the second rollers 21 is five or three.

[0061] like Figures 1-3 As shown, in an optional embodiment, the second roller 21 of the second pressure roller assembly 2, which is away from the fourth pressure roller assembly 4, is close to the first pressure roller assembly 1. The number of third rollers 31 is P, and the number of second rollers 21 is nP-1 or nP+1, where n is a positive integer. Specifically, a first material dropping area 22 is formed between two adjacent second rollers 21 of the second pressure roller assembly 2, which are away from the fourth pressure roller assembly 4. The first material dropping area 22 faces the side of the second pressure roller assembly 2. In this embodiment, the number of third rollers 31 is P, and the number of second rollers 21 is nP-1 or nP+1, so that the first composite film d and the third film c can be composited together, and the mutual influence between the first composite film d and the third film c can be avoided. For example, when n=1 and G=4, the number of second rollers 21 is five or three.

[0062] like Figure 2As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes an unwinding assembly 5, which is arranged at an interval from the fourth pressure roller assembly 4. Specifically, the unwinding assembly 5 is used to release the substrate f, which is then conveyed to the fourth pressure roller assembly 4. The fourth pressure roller assembly 4 combines the composite second composite film e with the substrate f to form a third composite film h. In this embodiment, the number of stacking operations can be reduced, thereby improving production efficiency.

[0063] In one alternative embodiment, a winding assembly 6 is provided downstream of the fourth pressure roller assembly 4, the winding assembly 6 being used to wind up the third composite film h.

[0064] like Figure 3 As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes a thinning roller assembly 7, which is located downstream of the fourth roller assembly 4. Specifically, the thinning roller assembly 7 is used to thin the third composite membrane h. When the first membrane a, the second membrane b, or the third membrane c in the third composite membrane h has not reached a preset thickness, the thinning roller assembly 7 is used to thin the third composite membrane h further, so that the first membrane a, the second membrane b, or the third membrane c reaches the preset thickness. In this embodiment, by thinning the third composite membrane h through the thinning roller assembly 7, the first membrane a, the second membrane b, or the third membrane c can reach a thinner thickness, which can avoid breakage during thinning.

[0065] In one optional embodiment, the diameter of the fourth roller 41 is larger than the diameter of the first roller 11, the diameter of the fourth roller 41 is larger than the diameter of the second roller 21, and the diameter of the third roller 31; specifically, the diameter of the fourth roller 41 is larger than the diameter of the first roller 11, the diameter of the fourth roller 41 is larger than the diameter of the second roller 21, and the diameter of the fourth roller 41 is larger than the diameter of the third roller 31. That is, the first pressure roller assembly 1, the second pressure roller assembly 2, and the third pressure roller assembly 3 can be arranged circumferentially around the fourth roller 41 and have no contact relationship with each other; the diameters of the first roller 11, the second roller 21, and the third roller 31 can be the same or different.

[0066] like Figure 4As shown, in one specific embodiment, the first membrane a is an electrode membrane, the second membrane b is an electrolyte membrane, and the third membrane c is an electrolyte membrane. In this embodiment, the thickness of the electrolyte membrane needs to be reduced. If the electrolyte membrane is reduced alone, it will cause the electrolyte membrane to break. Therefore, the first membrane a and the second membrane b are first combined to form a first composite membrane d, and then the first composite membrane d is reduced. Then, the first composite membrane d is combined with the third membrane c to form a second composite membrane e. The second composite membrane e is then reduced, and the second composite membrane e is combined with the substrate f to form a third composite membrane h. The thickness of the second membrane b and the third membrane c in the third composite membrane h reaches a preset thickness. Since the electrode membrane has a certain thickness, the breakage of the electrolyte membrane can be avoided. It can also reduce the number of stacking times, thereby improving production efficiency. It can also improve the alignment of the electrode membrane and the electrolyte membrane, improve the alignment accuracy, and thus improve the production quality.

[0067] like Figure 5 As shown, in another specific embodiment, the first membrane a is an electrode membrane, the second membrane b is an electrode membrane, and the third membrane c is an electrolyte membrane. In this embodiment, the thickness of the electrolyte membrane needs to be reduced. If the electrolyte membrane is reduced alone, it will cause the electrolyte membrane to break. Therefore, the first membrane a and the second membrane b are first combined to form a first composite membrane d, and then the first composite membrane d is combined with the third membrane c to form a second composite membrane e. The second composite membrane e is then reduced, and the second composite membrane e is combined with the substrate f to form a third composite membrane h. The thickness of the third membrane c in the third composite membrane h reaches a preset thickness. Since the electrode membrane has a certain thickness, the breakage of the electrolyte membrane can be avoided. It can also reduce the number of stacking times, thereby improving production efficiency. It can also improve the alignment of the electrode membrane and the electrolyte membrane, improve the alignment accuracy, and thus improve the production quality.

[0068] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A solid electrolyte preparation apparatus, characterized in that, include: A first pressure roller assembly, comprising a plurality of first rollers, wherein two adjacent first rollers are spaced apart; The second pressure roller assembly includes a plurality of second rollers, with adjacent second rollers spaced apart. The third pressure roller assembly includes a plurality of third rollers, with adjacent third rollers spaced apart. The fourth pressure roller assembly includes a plurality of fourth rollers, with adjacent fourth rollers spaced apart. The first pressure roller assembly, the second pressure roller assembly, and the third pressure roller assembly are arranged circumferentially at intervals along the same fourth roller.

2. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The first roller of the first pressure roller assembly is spaced apart from the fourth roller of the fourth pressure roller assembly; The second roller of the second pressure roller assembly is positioned at a distance from the fourth roller of the fourth pressure roller assembly; The third roller of the third pressure roller assembly is positioned close to the fourth roller assembly and is spaced apart from the fourth roller.

3. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The line connecting the center of the first roller and the center of the fourth roller is the first connecting line; The line connecting the center of the third roller and the center of the fourth roller is the second line; An angle M is formed between the first line and the second line, where 180° ≥ M > 0°.

4. The solid electrolyte preparation apparatus according to claim 3, characterized in that, The second pressure roller assembly is located between the first pressure roller assembly and the third pressure roller assembly; The line connecting the center of the second roller and the center of the fourth roller is the third line; The third line forms an angle K with the first line, where 90° ≥ K > 0°; The third line and the second line form an angle N, where 90° ≥ N > 0°.

5. The solid electrolyte preparation apparatus according to claim 3, characterized in that, The second pressure roller assembly is located between the first pressure roller assembly and the third pressure roller assembly; The line connecting the center of the second roller of the second pressure roller assembly, which is close to the center of the fourth roller assembly, and the center of the fourth roller is a third line, which is parallel to the vertical axis. The line connecting the center of the second roller of the second pressure roller assembly away from the center of the second roller assembly and the center of the adjacent second roller is the fourth connecting line. The fourth connecting line and the third connecting line form an angle W, where 90° ≥ W > 0°.

6. The solid electrolyte preparation apparatus according to claim 5, characterized in that, The second roller assembly is located away from the fourth roller assembly and close to the third roller assembly. The number of the first rollers is G, and the number of the second rollers is nG-1 or nG+1, where n is a positive integer.

7. The solid electrolyte preparation apparatus according to claim 5, characterized in that, The second roller assembly is located away from the fourth roller assembly and close to the first roller assembly. The number of the third rollers is P, and the number of the second rollers is nP-1 or nP+1, where n is a positive integer.

8. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The solid electrolyte preparation apparatus further includes an unwinding assembly, which is arranged at an interval from the fourth pressure roller assembly.

9. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The solid electrolyte preparation apparatus further includes a thinning pressure roller assembly, which is located downstream of the fourth pressure roller assembly.

10. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The diameter of the fourth roller is greater than the diameter of the first roller, the diameter of the fourth roller is greater than the diameter of the second roller, and the diameter of the fourth roller is greater than the diameter of the third roller.

Images