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 adjacent first roller, second compression roller subassembly, second compression roller subassembly includes a plurality of second roller, interval arrangement is arranged to two adjacent second roller, third compression roller subassembly, third compression roller subassembly includes a plurality of third roller, interval arrangement is arranged to two adjacent third roller, first compression roller subassembly with second compression roller subassembly is along same third roller's circumferential interval arrangement, first roller of first compression roller subassembly is close to third compression roller subassembly with third roller interval arrangement, second roller of second compression roller subassembly is close to third compression roller subassembly with third roller 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] 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, 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 first pressure roller assembly and the second pressure roller assembly are arranged circumferentially at intervals along the same third roller. The first roller of the first pressure roller assembly is spaced apart from the third roller near the third pressure roller assembly, and the second roller of the second pressure roller assembly is spaced apart from the third roller near the third pressure roller assembly.

[0010] Optionally, the line connecting the center of the first roller and the center of the third roller is the first connecting line;

[0011] The line connecting the center of the second roller and the center of the third roller is the second connecting line;

[0012] An angle M is formed between the first line and the second line, where 180° ≥ M > 0°.

[0013] Optionally, the line connecting the center of the first roller of the first pressure roller assembly near the center of the third roller assembly and the center of the third roller is a first connecting line, and the first connecting line is parallel to the vertical axis;

[0014] The line connecting the center of the first roller of the first pressure roller assembly away from the third pressure roller assembly and the center of the adjacent first roller is the third connecting line, and the third connecting line forms an angle W with the first connecting line, where 90°≥W>0°.

[0015] Optionally, the line connecting the center of the second roller of the second pressure roller assembly near the center of the third roller assembly and the center of the third roller is a second connecting line, and the second connecting line is parallel to the vertical axis;

[0016] The line connecting the center of the second roller of the second pressure roller assembly away from the third pressure roller assembly and the center of the adjacent second roller is the fourth line, and the fourth line forms an angle P with the second line, where 90°≥P>0°.

[0017] Optionally, 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.

[0018] Optionally, the solid electrolyte preparation apparatus further includes an unwinding assembly, which is arranged at an interval from the third pressure roller assembly.

[0019] Optionally, the solid electrolyte preparation apparatus further includes a thinning pressure roller assembly, which is located downstream of the third pressure roller assembly.

[0020] Optionally, the diameters of the first roller, the second roller, and the third roller are all the same.

[0021] One technical advantage of this application embodiment is that by combining two films together using the third pressure roller assembly before thinning, the breakage situation can be reduced when the first film or the second film is thinned to a preset thickness individually, thereby improving production quality.

[0022] 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

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the structure of the second composite membrane in an embodiment of this application.

[0030] 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 area 12; Second pressure roller assembly 2; Second roller 21; Second sub-roller 21a; Second feeding area 22; Third pressure roller assembly 3; Third roller 31; Unwinding assembly 4; Rewinding assembly 5; Thinning pressure roller assembly 6; First diaphragm a; Second diaphragm b; First composite diaphragm c; Substrate d; Second composite diaphragm f; First connecting line A; Second connecting line B; Third connecting line C; Fourth connecting line D. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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, and a third pressure roller assembly 3; wherein, 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 first pressure roller assembly 1 and the second pressure roller assembly 2 are arranged circumferentially spaced along the same third roller 31, with the first rollers 11 of the first pressure roller assembly 1 spaced apart from the third roller 31, and the second rollers 21 of the second pressure roller assembly 2 spaced apart from the third roller 31.

[0042] 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, and a third pressure roller assembly 3; 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, and the third pressure roller assembly 3 cooperates with the first pressure roller assembly 1 or the second pressure roller assembly 2 to combine the first film a and the second film b together to form a first composite film c, and the third pressure roller assembly 3 can also thin the first composite film c.

[0043] To further explain, the first pressure roller assembly 1 includes a plurality of first rollers 11, which are spaced apart and are used for calendering and conveying a first film a. By adjusting the gap between two adjacent first rollers 11, the first film a can be thinned. The second pressure roller assembly 2 includes a plurality of second rollers 21, which are spaced apart and are used for calendering and conveying a second film b. By adjusting the gap between two adjacent second rollers 21, the second film b can be thinned.

[0044] Further explanation: The third pressure roller assembly 3 includes multiple third rollers 31, which are spaced apart. These rollers 31 can be arranged sequentially in a horizontal direction or in a vertical direction. The first pressure roller assembly 1 and the second pressure roller assembly 2 are spaced apart circumferentially along the same third roller 31. The first roller 11 of the first pressure roller assembly 1, located near the third pressure roller assembly 3, is spaced apart from the third roller 31. The second roller 21 of the second pressure roller assembly 2, located near the third pressure roller assembly 3, is also spaced apart from the third roller 31. The multiple first rollers 11 can transport the first film a to the third pressure roller assembly 3, and the multiple second rollers 21 can transport the second film b to the second composite film f. Since one of the third rollers 31 is spaced apart from both the first roller 11 and the second roller 21, the first film a and the second film b can be composited together to form the first composite film c. The multiple third rollers 31 can thin the first composite film c.

[0045] Therefore, the solid electrolyte preparation apparatus 100 provided in this application can reduce the possibility of breakage when the first membrane a or the second membrane b is thinned to a preset thickness by combining the first membrane a and the second membrane b together to form a first composite membrane c, thereby improving the quality of the first composite membrane c.

[0046] like Figures 1-3As shown, in an optional embodiment, the line connecting the center of the first roller 11 and the center of the third roller 31 is the first connecting line A; the line connecting the center of the second roller 21 and the center of the third roller 31 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 refers to the center of the radial cross-section of the first roller 11, the center of the second roller 21 refers to the circle of the radial cross-section of the second roller 21, and the center of the third roller 31 refers to the center of the radial cross-section of the third roller 31; the line connecting the center of the first roller 11 and the center of the third roller 31 is the first connecting line A, which can be understood as the line connecting the center of the first roller 11 and the center of the third roller 31 of the first pressure roller assembly 1 near the third pressure roller assembly 3, or any connecting line between the center of the first roller 11 and the center of the third roller 31. The first line, or the line connecting the center of multiple first rollers 11 and the center of the third roller 31, is a straight line; the line connecting the center of the second roller 21 and the center of the third roller 31 is the second line, which can be understood as the line connecting the center of the second roller 21 near the third roller assembly 3 and the center of the third roller 31, or the line connecting the center of any one of the second rollers 21 and the center of the third roller 31, or the line connecting the centers of multiple first rollers 11 and the center of the third roller 31, and the second line is a straight line; the first line A and the second line B form an angle M, 180°≥M>0°. In the vertical direction, the first roller assembly 1 and the second roller assembly 2 are located above the third roller assembly 3. Within the range of 180°≥M>0°, it is convenient to install the first roller assembly 1 and the second roller assembly 2, and it can make the structure of the solid electrolyte preparation device 100 more compact.

[0047] like Figure 4 As shown, in an optional embodiment, the line connecting the center of the first roller 11 of the first pressure roller assembly 1 near the center of the third roller 31 of the third pressure roller assembly 3 is a first connecting line A, which is parallel to the vertical axis; that is, the first roller 11 of the first pressure roller assembly 1 near the center of the third pressure roller assembly 3 is a first sub-roller 11a, and the line connecting the center of the first sub-roller 11a and the center of the third roller 31 is a first connecting line A, which is parallel to the vertical axis.

[0048] like Figure 4As shown, further explained, the line connecting the center of the first roller 11 of the first pressure roller assembly 1 away from the third pressure roller assembly 3 and the center of the adjacent first roller 11 is the third connecting line C, and the third connecting line C 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 third pressure roller assembly 3 is the third connecting line C, and the third connecting line C 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 third pressure roller assembly 3, and the first material dropping area 12 faces upward or obliquely upward, thereby preventing powder from falling.

[0049] like Figure 5 As shown, in an optional embodiment, the line connecting the center of the second roller 21 of the second pressure roller assembly 2 near the center of the third pressure roller assembly 31 with the center of the third roller 31 is the second connecting line B, which is parallel to the vertical axis; that is, the second roller 21 of the second pressure roller assembly 2 near the center of the third pressure roller assembly 3 is the second sub-roller 21a, and the line connecting the center of the second sub-roller 21a with the center of the third roller 31 is the second connecting line B, which is parallel to the vertical axis.

[0050] 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 third pressure roller assembly 3 and the center of the adjacent second roller 21 is the fourth connecting line D. The fourth connecting line D 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 third pressure roller assembly 3 is the fourth connecting line D. The fourth connecting line D and the first connecting line A 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 third pressure roller assembly 3. The second material dropping area 22 faces upward or obliquely upward, thereby preventing powder from falling.

[0051] In one optional embodiment, 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 feeding area 12 is formed between two adjacent first rollers 11 of the first pressure roller assembly 1 away from the third pressure roller assembly 3. 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 third pressure roller assembly 3. 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. For example, when n=1 and G=4, the number of first rollers 11 is five or three.

[0052] like Figure 2 As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes an unwinding assembly 4, which is arranged at an interval from the third pressure roller assembly 3. Specifically, the unwinding assembly 4 is used to release the substrate d, which is conveyed to the third pressure roller assembly 3. The third pressure roller assembly 3 combines the first composite film c with the substrate d to form a second composite film f. In this embodiment, the number of stacking steps can be reduced, thereby improving production efficiency. Furthermore, the alignment of the second composite film f can be improved, increasing alignment accuracy and thus improving production quality.

[0053] like Figure 2 As shown, in an optional embodiment, a winding assembly 5 is provided downstream of the third pressure roller assembly 3, the winding assembly 5 being used to wind up the second composite film f.

[0054] like Figure 3 As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes a thinning roller assembly 6, which is located downstream of the third roller assembly 3. Specifically, the thinning roller assembly 6 is used to thin the second composite membrane f. When the first membrane a or the second membrane b in the second composite membrane f has not reached a preset thickness, the thinning roller assembly 6 is used to thin the second composite membrane f to make the first membrane a or the second membrane b reach the preset thickness. In this embodiment, by thinning the second composite membrane f through the thinning roller assembly 6, the first membrane a or the second membrane b can reach a thinner thickness, which can avoid breakage during thinning.

[0055] In an optional embodiment, the diameters of the first roller 11, the second roller 21, and the third roller 31 are all the same; since the diameters of the first roller 11, the second roller 21, and the third roller 31 are all the same, the first roller 11, the second roller 21, and the third roller 31 can all be rollers of the same model, thereby simplifying the installation steps.

[0056] This application provides a method for preparing a solid electrolyte, the method comprising:

[0057] S1. The first pressure roller assembly 1 calenders and conveys the first film a to the third pressure roller assembly 3;

[0058] S2, the second pressure roller assembly 2 calenders and conveys the second film b to the third pressure roller assembly 3;

[0059] S3. The first membrane a and the second membrane b are combined to form a first composite membrane c, and the first composite membrane c is thinned.

[0060] like Figure 1-5 As shown, the first pressure roller assembly 1 is used to calender and convey the first film a to the third pressure roller assembly 3, and the second pressure roller assembly 2 is used to calender and convey the second film b to the third pressure roller assembly 3. The third pressure roller assembly 3, together with the first pressure roller assembly 1 or the second pressure roller assembly 2, combines the first film a and the second film b together to form a first composite film c. The third pressure roller assembly 3 also thins the first composite film c while conveying it.

[0061] like Figure 6 As shown, in an optional embodiment, the first membrane a is an electrolyte membrane, and the second membrane b is an electrode 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 c, and then the first composite membrane c is thinned so that the thickness of the first membrane a 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 with the electrolyte membrane, improve the alignment accuracy, and thus improve the production quality.

[0062] In another specific embodiment, the first membrane a is an electrolyte membrane, and the second membrane b is a substrate.

[0063] In one optional embodiment, the preparation method further includes:

[0064] S4. The unwinding assembly 4 releases the substrate d and conveys it to the third pressure roller assembly 3. The third pressure roller assembly 3 combines the first composite film c and the substrate d to form a second composite film f. Specifically, the unwinding assembly 4 is used to release the substrate d, which is then conveyed to the third pressure roller assembly 3. The third pressure roller assembly 3 combines the first composite film c and the substrate d together to form the second composite film f. In this embodiment, the number of stacking operations can be reduced, thereby improving production efficiency.

[0065] In one optional embodiment, the substrate d is a current collector; in this embodiment, the first composite film c is combined with the current collector, and it is no longer necessary to stack the first composite film c with the current collector separately, thereby reducing process steps and improving work efficiency.

[0066] In another alternative embodiment, the substrate d is a release film; in this embodiment, the first composite film c is laminated together with the release film, and the first composite film c can be laminated together with other films or foils as needed. After lamination, the release film can be peeled off.

[0067] In one optional embodiment, the preparation method further includes:

[0068] S5. The thinning roller assembly 6 thins the second composite film f. Specifically, in this embodiment, the thinning roller assembly 6 thins the second composite film f so that the first film a or the second film b reaches a preset thickness. In this embodiment, the thinning roller assembly 6 thins the second composite film f, enabling the first film a or the second film b to reach a thinner thickness and preventing breakage during the thinning process.

[0069] 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 first pressure roller assembly and the second pressure roller assembly are arranged circumferentially at intervals along the same third roller. The first roller of the first pressure roller assembly is spaced apart from the third roller near the third pressure roller assembly, and the second roller of the second pressure roller assembly is spaced apart from the third roller near the third pressure roller assembly.

2. 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 third roller is the first connecting line; The line connecting the center of the second roller and the center of the third roller is the second connecting line; An angle M is formed between the first line and the second line, where 180° ≥ M > 0°.

3. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The line connecting the center of the first roller of the first pressure roller assembly near the center of the third roller assembly and the center of the third 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 third pressure roller assembly and the center of the adjacent first roller is the third connecting line, and the third connecting line forms an angle W with the first connecting line, where 90°≥W>0°.

4. The solid electrolyte preparation apparatus according to claim 1, 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 third roller assembly, and the center of the third roller is the second connecting 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 third pressure roller assembly and the center of the adjacent second roller is the fourth line, and the fourth line forms an angle P with the second line, where 90°≥P>0°.

5. The solid electrolyte preparation apparatus according to claim 1, characterized in that, 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.

6. 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 third pressure roller assembly.

7. 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 third pressure roller assembly.

8. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The diameters of the first roller, the second roller, and the third roller are all the same.

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