A solid-state electrolyte preparation device

Abstract

This utility model discloses a solid electrolyte preparation apparatus, comprising: a first pressure roller assembly, the first pressure roller assembly including a plurality of first rollers spaced apart; a second pressure roller assembly, the second pressure roller assembly including a plurality of second rollers spaced apart; a third pressure roller assembly, the third pressure roller assembly including a plurality of third rollers spaced apart in a horizontal direction; and a fourth pressure roller assembly, the fourth pressure roller assembly including a fourth roller and a fifth roller, the fourth roller and the fifth roller being spaced apart in a vertical direction; the first rollers of the first pressure roller assembly near the fourth pressure roller assembly being spaced apart from the fourth roller, the second rollers of the second pressure roller assembly near the fourth pressure roller assembly being spaced apart from the fourth roller, and the third rollers of the third pressure roller assembly near the fourth pressure roller assembly being spaced apart from the fifth roller in a horizontal direction.

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] One objective 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 spaced apart;

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

[0008] The third pressure roller assembly includes a plurality of third rollers, which are spaced apart in a horizontal direction.

[0009] The fourth pressure roller assembly includes a fourth roller and a fifth roller, which are spaced apart in the vertical direction.

[0010] 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 spaced apart from the fourth roller of the fourth pressure roller assembly; and the third roller of the third pressure roller assembly is spaced apart from the fifth roller of the fourth pressure roller assembly in a horizontal direction.

[0011] Optionally, the first pressure roller assembly and the second pressure roller assembly are arranged circumferentially spaced along the fourth roller, and in the vertical direction, the first pressure roller assembly and the second pressure roller assembly are located above the third pressure roller assembly.

[0012] Optionally, the line connecting the center of the first roller and the center of the fourth roller is the first connecting line;

[0013] The line connecting the center of the second roller and the fourth roller is the second connecting line;

[0014] An angle N is formed between the first line and the second line, where 180° > N > 0°.

[0015] Optionally, the line connecting the center of the plurality of first rollers and the center of the fourth roller is the first connecting line;

[0016] The line connecting the center of the fourth roller and the center of the fifth roller is the third line;

[0017] The third line forms an angle K with the first line, where 180° > K > 90°.

[0018] Optionally, the line connecting the center of the plurality of second rollers and the center of the fourth roller is the second connecting line;

[0019] The line connecting the center of the fourth roller and the center of the fifth roller is the third line;

[0020] An angle M is formed between the third line and the second line, where 180° > M > 90°.

[0021] Optionally, the line connecting the center of the first roller of the first pressure roller assembly near the center of the fourth roller assembly and the center of the fourth roller is a first connecting line, and the first connecting line is parallel to the vertical axis.

[0022] The line connecting the center of the first roller of the first pressure roller assembly away from the fourth pressure roller assembly and the center of the adjacent first roller is the fourth connecting line, and the fourth connecting line forms an angle W with the first connecting line, where 90°≥W>0°.

[0023] Optionally, the line connecting the center of the second roller of the second pressure roller assembly near the center of the fourth roller assembly and the center of the fourth roller is a second connecting line, and the second connecting line is parallel to the vertical axis;

[0024] The line connecting the center of the second roller assembly away from the fourth roller assembly and the center of the adjacent second roller assembly is the fifth line, and the fifth line and the second line form an angle P, where 90°≥P>0°.

[0025] Optionally, the number of the second roller is G, and the number of the first roller is nG+1 or nG-1, where n is a positive integer.

[0026] Optionally, the solid electrolyte preparation apparatus further includes an unwinding assembly and a fifth pressure roller assembly, wherein the fifth pressure roller assembly and the fifth roller are arranged in a horizontal direction, and the unwinding assembly and the fifth pressure roller assembly are arranged at intervals.

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

[0028] One technical advantage of this application embodiment is that by combining two and / or three films together using the fourth pressure roller assembly before thinning, the breakage situation can be reduced when the first, second, or third film is individually thinned to a preset thickness, thereby improving production quality.

[0029] 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

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the third composite membrane in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the structure of the third composite membrane in the embodiments of this application.

[0038] 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; First feeding zone 12; Second pressure roller assembly 2; Second roller 21; Second sub-roller 21a; Second feeding zone 22; Third pressure roller assembly 3; Third roller 31; Third feeding zone 32; Fourth pressure roller assembly 4; Fourth roller 41; Fifth roller 42; Fifth pressure roller assembly 5; Unwinding assembly 6; Thinning pressure roller assembly 7; Rewinding assembly 8; First diaphragm a; Second diaphragm b; Third diaphragm c; First composite diaphragm d; Second composite diaphragm e; Substrate f; Third composite diaphragm g; First connecting line A; Second connecting line B; Third connecting line C; Fourth connecting line D; Fifth connecting line E. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" 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.

[0045] In the description of this utility model, 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 utility model 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 utility model.

[0046] In the description of this utility model, 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 utility model according to the specific circumstances.

[0047] 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 , Figure 3 , Figure 4 and Figure 5 The marked directions. Among them, the horizontal axis intersects the vertical axis.

[0048] 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.

[0049] like Figures 1-5As 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, which are spaced apart; the second pressure roller assembly 2 includes a plurality of second rollers 21, which are spaced apart; the third pressure roller assembly 3 includes a plurality of third rollers 31, which are spaced apart in a horizontal direction; the fourth pressure roller assembly 4 includes a fourth roller 41 and a fifth roller 42, which are spaced apart in a vertical direction; the first rollers 11 of the first pressure roller assembly 1 near the fourth pressure roller assembly 4 are spaced apart from the fourth roller 41, the second rollers 21 of the second pressure roller assembly 2 near the fourth pressure roller assembly 4 are spaced apart from the fourth roller 41, and the third rollers 31 of the third pressure roller assembly 3 near the fourth pressure roller assembly 4 are spaced apart from the fifth roller 42 in a horizontal direction.

[0050] like Figures 1-5 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, and the fourth pressure roller assembly 4 is used for combining the first film a and the second film b together to form a first composite film d, and thinning the first composite film d, and then combining the first composite film d and the third composite film g together to form a second composite film e, and thinning the second composite film e.

[0051] 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 spaced apart and 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 spaced apart in a horizontal direction and used to transport a third diaphragm c. By adjusting the gap between two adjacent third rollers 31, the third diaphragm c can be thinned.

[0052] Further explanation: The fourth pressure roller assembly 4 includes a fourth roller 41 and a fifth roller 42, which are vertically spaced apart. Vertically, the fourth roller 41 is positioned above the fifth roller 42, and a roller gap is formed between the fourth roller 41 and the fifth roller 42. The first roller assembly 1, with its first roller 11 near the fourth pressure roller assembly 4, is spaced apart from the fourth roller 41. The second roller assembly 2, with its second roller 21 near the fourth pressure roller assembly 4, is spaced apart from the fourth roller 41. The third roller assembly 3, with its third roller 31 near the fourth pressure roller assembly 4, is spaced apart from the fifth roller 42. Therefore, the plurality of first rollers 11 can... The first diaphragm a is conveyed to the fourth pressure roller assembly 4. Multiple second rollers 21 can convey the second diaphragm b to the fourth pressure roller assembly 4. The fourth roller 41, together with the first roller 11 and the second roller 21, can combine the first diaphragm a and the second diaphragm b to form a first composite diaphragm d. The fourth roller 41 and the fifth roller 42 can convey the first composite diaphragm d and thin it. Multiple third rollers 31 can convey the third diaphragm c to the fourth pressure roller assembly 4. The fifth roller 42 and the third roller 31 can combine the first composite diaphragm d and the third diaphragm c to form a second composite diaphragm e and thin it.

[0053] Therefore, the solid electrolyte preparation apparatus 100 provided in this application, by combining the first membrane a and the second membrane b together to form a first composite membrane d and then thinning it, and by combining the first composite membrane d with the third membrane c to form a second composite membrane e and then thinning it, 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 e; furthermore, combining the first membrane a, the second membrane b, and the third membrane c together to form the second composite membrane e can also reduce the number of stacking steps, thereby improving production efficiency; and furthermore, it can improve the alignment degree of the second composite membrane e, improve the alignment accuracy, thereby improving production quality.

[0054] like Figures 1-5As shown, in an optional embodiment, the first pressure roller assembly 1 and the second pressure roller assembly 2 are arranged circumferentially spaced along the fourth roller 41, and in the vertical direction, the first pressure roller assembly 1 and the second pressure roller assembly 2 are located above the third pressure roller assembly 3; specifically, the first roller 11 of the first pressure roller assembly 1 near the fourth pressure roller assembly 4 is the first sub-roller 11a, and the second roller 21 of the second pressure roller assembly 2 near the fourth pressure roller assembly 4 is the second sub-roller 21a, the first sub-roller 11a and... The fourth roller 41 is spaced apart, the second sub-roller 21a is spaced apart from the fourth roller 41, and the first sub-roller 11a and the second sub-roller 21a are arranged circumferentially around the fourth roller 41. That is, the first sub-roller 11a and the second sub-roller 21a will not affect each other. In this embodiment, the first pressure roller assembly 1 and the second pressure roller assembly 2 can be reasonably arranged, and the first sub-roller 11a or the second sub-roller 21a and the fourth roller 41 can combine the first diaphragm a and the second diaphragm b together.

[0055] like Figure 1 and Figure 2As 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 line A; the line connecting the center of the second roller 21 and the fourth roller 41 is the second line B; the first line A and the second line B form an angle N, where 180° > N > 0°. Specifically, the center of the first roller 11 refers to the center of the radial section of the first roller 11, the center of the fourth roller 41 is the center of the radial section of the fourth roller 41, and the center of the second roller 21 refers to the center of the radial section of the second roller 21; the line connecting the center of the first roller 11 and the center of the fourth roller 41 is the first connecting line A. This can be understood as the line connecting the center of the first sub-roller 11a and the center of the fourth roller 41 being the first connecting line A, or the line connecting the center of any one of the first rollers 11 and the center of the fourth roller 41 being the first connecting line A, or the line connecting the centers of multiple first rollers 11 and the centers of the fourth roller 41 being the first connecting line A, and the first connecting line A being a straight line; the center of the second roller 21 and the center of the fourth roller 41... The line connecting the centers of 41 is the second line B. This can be understood as the line connecting the center of the second sub-roller 21a and the center of the fourth roller 41 being the second line B. This can be 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 being the second line B. The second line B is a straight line. An angle N is formed between the first line A and the second line B. Since the first pressure roller assembly 1 and the second pressure roller assembly 2 are located above the third pressure roller assembly 3 in the vertical direction, within the range of 180° > N > 0°, the first roller 11 of the first pressure roller assembly 1 and the third roller 31 of the third pressure roller assembly 3 can avoid mutual interference.

[0056] like Figure 2As shown, in an optional embodiment, the line connecting the center of the plurality of first rollers 11 and the center of the fourth roller 41 is the first connecting line A, and the line connecting the center of the fourth roller 41 and the center of the fifth roller 42 is the third connecting line C; the third connecting line C and the first connecting line A form an angle K, where 180° > K > 90°; specifically, the center of the fifth roller 42 refers to the center of the radial section of the fifth roller 42 ... forms an angle K, where 180° > K > 90°; The line connecting the centers of 2 is the third line C, and the fourth roller 41 and the fifth roller 42 are arranged in the vertical direction, so the third line C is parallel to the vertical axis; the third line C and the first line A form an angle K, 180°>K>90°; in this embodiment, a first material dropping area 12 is formed between two adjacent first rollers 11 away from the fourth pressure roller assembly 4. The first material dropping area 12 is used to place powder, and the powder can be rolled into a first film a by the first pressure roller assembly 1. The first material dropping area 12 faces obliquely upward, which can prevent the powder from falling.

[0057] like Figure 2 As shown, in an optional embodiment, the line connecting the centers of the plurality of second rollers 21 and the center of the fourth roller 41 is the second connecting line B, and the line connecting the center of the fourth roller 41 and the center of the fifth roller 42 is the third connecting line C; the third connecting line C and the second connecting line B form an angle M, 180° > M > 90°; specifically, the center of the fifth roller 42 refers to the center of the radial section of the fifth roller 42, the line connecting the centers of the plurality of second rollers 21 and the center of the fourth roller 41 is the second connecting line B, the line connecting the center of the fourth roller 41 and the center of the fifth roller 42 is the third connecting line C, and the fourth roller 21... 41 and the fifth roller 42 are arranged vertically, so the third connecting line C is parallel to the vertical axis; the third connecting line C and the second connecting line B form an angle M, 180° > M > 90°; in this embodiment, on the one hand, a certain distance can be made between the second pressure roller assembly 2 and the third pressure roller assembly 3 to avoid mutual interference; on the other hand, a second material dropping area 22 is formed between two adjacent second rollers 21 away from the fourth pressure roller assembly 4 of the second pressure roller assembly 2. The second material dropping area 22 is used to place powder. The powder can be rolled into a second film b by the second pressure roller assembly 2. The second material dropping area 22 faces obliquely upward to prevent the powder from falling.

[0058] like Figure 4As shown, in an optional embodiment, the line connecting the center of the first roller 11 near the center of the fourth roller 41 of the first roller assembly 1 is a first connecting line A, which is parallel to the vertical axis; that is, the line connecting the center of the first sub-roller 11a and the center of the fourth roller 41 is a first connecting line A, which is parallel to the vertical axis.

[0059] like Figure 4 As shown, further explained, the line connecting the center of the first roller 11 of the first pressure roller assembly 1 away from the fourth pressure roller assembly 4 and the center of the adjacent first roller 11 is the fourth connecting line D. The fourth connecting line D and the first connecting line A form an angle W, 90°≥W>0°. Specifically, the line connecting the two adjacent first rollers 11 of the first pressure roller assembly 1 away from the fourth pressure roller assembly 4 is the fourth connecting line D. The fourth connecting line D and the first connecting line A form an angle W, 90°≥W>0°. In this embodiment, a first material dropping area 12 is formed between the two adjacent first rollers 11 of the first pressure roller assembly 1 away from the fourth pressure roller assembly 4. The first material dropping area 12 faces upward or obliquely upward, thereby preventing powder from falling.

[0060] like Figure 5 As shown, in an optional embodiment, the line connecting the center of the second roller 21 near the center of the fourth roller 41 of the second roller assembly 2 is the second connecting line B, 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 the second connecting line B, which is parallel to the vertical axis.

[0061] like Figure 5 As shown, further explained, 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 fifth connecting line E, and the fifth connecting line E and the second connecting line B form an angle P, 90°≥P>0°; specifically, the line connecting the two adjacent second rollers 21 of the second pressure roller assembly 2 away from the fourth pressure roller assembly 4 is the fifth connecting line E, and the fifth connecting line E and the second connecting line B form an angle P, 90°≥P>0°; in this embodiment, a second material dropping area 22 is formed between the two adjacent second rollers 21 of the second pressure roller assembly 2 away from the fourth pressure roller assembly 4, and the second material dropping area 22 faces upward or obliquely upward, thereby preventing powder from falling.

[0062] like Figures 1-3As shown, in an optional embodiment, the plurality of third rollers 31 of the third pressure roller assembly 3 are arranged in a horizontal direction, and a third material discharge area 32 is formed between the two third rollers 31 of the third pressure roller assembly 3 that are away from the fourth pressure roller assembly 4. The third material discharge area 32 faces upward and is used to hold powder. The third pressure roller assembly 3 can calender the powder to form a third film c and convey the third film c to the fourth pressure roller assembly 4.

[0063] In one optional embodiment, the number of second rollers 21 is G, and the number of first rollers 11 is nG+1 or nG-1, where n is a positive integer. Specifically, a first feeding 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 first feeding area 12 holds powder, and the first pressure roller assembly 1 rolls the powder to form a first film a. A second feeding 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 second feeding area 22 holds powder, and the second pressure roller assembly 2 rolls the powder to form a second film b. In this embodiment, when the number of second rollers 21 is G, the number of first rollers 11 is nG+1 or nG-1, thereby enabling the first film a and the second film b to be combined together, avoiding mutual interference between the first film a and the second film b. For example, when n=1 and G=4, the number of first rollers 11 is five or three.

[0064] like Figure 2 and Figure 3 As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes an unwinding assembly 6 and a fifth pressure roller assembly 5. The fifth pressure roller assembly 5 and the fifth roller 42 are arranged horizontally, and the unwinding assembly 6 and the fifth pressure roller assembly 5 are arranged at intervals. Specifically, the unwinding assembly 6 is used to release the substrate f, which is then conveyed to the fifth pressure roller assembly 5. The fifth pressure roller assembly 5 combines the second composite film e (after being composited by the fourth pressure roller assembly 4) with the substrate f to form a third composite film g. In this embodiment, the number of stacking operations can be reduced, thereby improving production efficiency.

[0065] like Figure 2 As shown, in one alternative embodiment, a winding assembly 8 is provided downstream of the fifth pressure roller assembly 5, the winding assembly 8 being used to wind up the third composite film g.

[0066] like Figure 3As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes a thinning roller assembly 7, which is located downstream of the fifth roller assembly 5. Specifically, the thinning roller assembly 7 and the fifth roller 42 are arranged horizontally, with the thinning roller assembly 7 located on the side of the fifth roller 42 away from the third roller assembly 3. The thinning roller assembly 7 is used to thin the third composite membrane g. When the first membrane a, the second membrane b, or the third membrane c in the third composite membrane g has not reached the preset thickness, the thinning roller assembly 7 is used to thin the third composite membrane g to make the first membrane a, the second membrane b, or the third membrane c reach the preset thickness. In this embodiment, by thinning the third composite membrane g 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.

[0067] This application provides a method for preparing a solid electrolyte, which can be achieved using the solid electrolyte preparation apparatus 100 described above. The preparation method includes:

[0068] S1. The first pressure roller assembly 1 calenders and conveys the first film a to the fourth pressure roller assembly 4;

[0069] S2, the second pressure roller assembly 2 calenders and conveys the second film b to the fourth pressure roller assembly 4;

[0070] S3, the third pressure roller assembly 3 calenders and conveys the third film c to the fourth pressure roller assembly 4;

[0071] S4. The first membrane a and the second membrane b are combined to form a first composite membrane d, and the first composite membrane d is thinned. Then, the third membrane c and the first composite membrane d are combined to form a second composite membrane e, and the second composite membrane e is thinned.

[0072] like Figures 1-5 As shown, the first pressure roller assembly 1 is used for calendering and conveying the first film a to the fourth pressure roller. The second pressure roller assembly 2 is used for calendering and conveying the second film b to the fourth pressure roller. The fourth pressure roller assembly 4, together with the first pressure roller assembly 1 or the second pressure roller assembly 2, combines the first diaphragm a and the second diaphragm b to form a first composite diaphragm d. The fourth pressure roller assembly 4 thins the first composite diaphragm d while conveying it. Then, the fourth pressure roller assembly 4, together with the third pressure roller assembly 3, combines the first composite diaphragm d and the third diaphragm c to form a second composite diaphragm e, and thins the second composite diaphragm e.

[0073] like Figure 6As 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 electrolyte membrane needs to be thinned. If the electrolyte membrane is thinned 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 thinned. Then, the first composite membrane d is combined with the third membrane c to form a second composite membrane e, and then the second composite membrane e is thinned so that the thickness of the second membrane b and the third membrane c reaches the 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.

[0074] like Figure 7 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 so that the thickness of the third membrane c 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.

[0075] In an optional embodiment, the preparation method further includes: S5, the unwinding assembly 6 releases the substrate f and conveys it to the fifth pressure roller assembly 5, the fifth pressure roller assembly 5 composites the second composite film e and the substrate f to form a third composite film g; specifically, the unwinding assembly 6 is used to release the substrate f, the substrate f is conveyed to the fifth pressure roller assembly 5, the fifth pressure roller assembly 5 composites the second composite film e (composite to the fourth pressure roller assembly 4) with the substrate f together to form the third composite film g; in this embodiment, the number of stacking times can be reduced, thereby improving production efficiency.

[0076] In one optional embodiment, the substrate f is a current collector; in this embodiment, the second composite film e is combined with the current collector, and it is no longer necessary to stack the second composite film e with the current collector separately, thereby reducing process steps and improving work efficiency.

[0077] In another alternative embodiment, the substrate f is a release film; in this embodiment, the second composite film e is laminated together with the release film, and the second composite film e can be laminated together with other films or foils as needed. After lamination, the release film can be peeled off.

[0078] In one optional embodiment, the preparation method further includes:

[0079] S6. The thinning roller assembly 7 thins the third composite film g. Specifically, in this embodiment, the thinning roller assembly 7 thins the third composite film g so that the first film a, the second film b, or the third film c reaches a preset thickness. In this embodiment, the thinning roller assembly 7 thins the third composite film g, enabling the first film a, the second film b, or the third film c to reach a thinner thickness, and preventing breakage during the thinning process.

[0080] 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 spaced apart; The second pressure roller assembly includes a plurality of second rollers, which are spaced apart. The third pressure roller assembly includes a plurality of third rollers, which are spaced apart in a horizontal direction. The fourth pressure roller assembly includes a fourth roller and a fifth roller, which are spaced apart in the vertical direction. 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 spaced apart from the fourth roller of the fourth pressure roller assembly; and the third roller of the third pressure roller assembly is spaced apart from the fifth roller of the fourth pressure roller assembly in a horizontal direction.

2. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The first pressure roller assembly and the second pressure roller assembly are arranged circumferentially at intervals along the fourth roller, and in the vertical direction, the first pressure roller assembly and the second pressure roller assembly are located above the third pressure roller assembly.

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 second roller and the fourth roller is the second connecting line; An angle N is formed between the first line and the second line, where 180° > N > 0°.

4. The solid electrolyte preparation apparatus according to claim 3, characterized in that, The line connecting the center of the plurality of first rollers and the center of the fourth roller is the first connecting line; The line connecting the center of the fourth roller and the center of the fifth roller is the third line; The third line forms an angle K with the first line, where 180° > K > 90°.

5. The solid electrolyte preparation apparatus according to claim 3, characterized in that, The line connecting the center of the plurality of second rollers and the center of the fourth roller is the second connecting line; The line connecting the center of the fourth roller and the center of the fifth roller is the third line; An angle M is formed between the third line and the second line, where 180° > M > 90°.

6. The solid electrolyte preparation apparatus according to claim 3, characterized in that, The line connecting the center of the first roller of the first pressure roller assembly near the center of the fourth roller assembly and the center of the fourth roller is the first connecting line, and the first connecting line is parallel to the vertical axis. The line connecting the center of the first roller of the first pressure roller assembly away from the fourth pressure roller assembly and the center of the adjacent first roller is the fourth connecting line, and the fourth connecting line forms an angle W with the first connecting line, where 90°≥W>0°.

7. The solid electrolyte preparation apparatus according to claim 3, characterized in that, 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, is the second connecting line, which is parallel to the vertical axis. The line connecting the center of the second roller assembly away from the fourth roller assembly and the center of the adjacent second roller assembly is the fifth line, and the fifth line and the second line form an angle P, where 90°≥P>0°.

8. The solid electrolyte preparation apparatus according to claim 5, characterized in that, The number of the second roller is G, and the number of the first roller is nG+1 or nG-1, where n is a positive integer.

9. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The solid electrolyte preparation apparatus further includes an unwinding assembly and a fifth pressure roller assembly. The fifth pressure roller assembly and the fifth roller are arranged in a horizontal direction, and the unwinding assembly and the fifth pressure roller assembly are arranged at intervals.

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

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