A solid-state electrolyte preparation device

Abstract

The utility model discloses a solid electrolyte preparation device, solid electrolyte preparation device includes: first compression roller subassembly and second compression roller subassembly, first compression roller subassembly with second compression roller subassembly interval setting, coating subassembly, coating subassembly locates between first compression roller subassembly with second compression roller subassembly, and in vertical direction is located first compression roller subassembly and the top of second compression roller subassembly. The technical scheme provided by the present application, through the second compression roller subassembly, the first membrane and the first powder are compounded together to form the first composite membrane, and the first composite membrane is thinned, so that the first membrane or the second membrane can be thinned to the preset thickness, and the quality of the first composite membrane can be improved.

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 and a second pressure roller assembly are arranged at intervals;

[0007] A coating assembly is disposed between the first pressure roller assembly and the second pressure roller assembly, and is located above the first pressure roller assembly and the second pressure roller assembly in the vertical direction.

[0008] Optionally, the first pressure roller assembly includes a plurality of first rollers, which are spaced apart in a horizontal direction;

[0009] The second pressure roller assembly includes a second roller and a third roller, wherein the third roller is spaced apart from the second roller and is located above the second roller in the vertical direction.

[0010] Optionally, the tangent between the first roller and the second roller near the coating assembly is parallel to the horizontal axis.

[0011] Optionally, the second pressure roller assembly further includes at least one fourth roller, which is spaced apart from the second roller and is spaced apart from the third roller along the circumference of the second roller.

[0012] Optionally, the diameter of the third roller is smaller than the diameter of the second roller, and the diameter of the fourth roller is smaller than the diameter of the second roller.

[0013] Optionally, the second pressure roller assembly further includes at least one fifth roller, which is spaced horizontally from the second roller.

[0014] Optionally, the second pressure roller assembly further includes a fourth roller and at least one fifth roller, the fourth roller being spaced apart from the second roller, the fourth roller being spaced apart from the third roller along the circumference of the second roller, and the fifth roller being spaced apart from the second roller along the horizontal direction;

[0015] The line connecting the center of the third roller and the center of the second roller is the first line, and the line connecting the center of the fourth roller and the center of the second roller is the second line. An angle M is formed between the second line and the first line, and M is an acute angle.

[0016] Optionally, the solid electrolyte preparation apparatus further includes a feeding assembly located vertically above the space between two adjacent first rollers.

[0017] Optionally, the solid electrolyte preparation apparatus further includes an unwinding assembly, which is disposed between two adjacent first rollers, and the unwinding assembly is spaced apart from the unloading assembly.

[0018] One technical advantage of this application embodiment is that the second pressure roller assembly combines the first film and the first powder together to form a first composite film and thins the first composite film, thereby reducing the possibility of breakage when the first film or the second film is thinned to a preset thickness, thereby improving the quality of the first composite film.

[0019] 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

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the solid electrolyte preparation apparatus in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the first composite membrane in an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: Solid electrolyte preparation apparatus 100; First pressure roller assembly 1; First roller 11; Feeding area 12; Second pressure roller assembly 2; Second roller 21; Third roller 22; Fourth roller 23; Fifth roller 24; Coating assembly 3; Feeding assembly 4; Unwinding assembly 5; Rewinding assembly 6; First membrane a; First sub-membrane a1; Substrate a2; Second membrane b; First composite membrane c; First connecting line A; Second connecting line B. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and 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.

[0032] 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.

[0033] 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 and Figure 2 The marked directions. Among them, the horizontal axis intersects the vertical axis.

[0034] 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.

[0035] like Figure 1 and Figure 2 As shown, according to a first aspect of the present application, a solid electrolyte preparation apparatus 100 is provided, including a first pressure roller assembly 1, a second pressure roller assembly 2, and a coating assembly 3; the second pressure roller assembly 2 is disposed at a distance from the first pressure roller assembly 1; the coating assembly 3 is disposed between the first pressure roller assembly 1 and the second pressure roller assembly 2, and is located above the first pressure roller assembly 1 and the second pressure roller assembly 2 in the vertical direction.

[0036] like Figure 1As shown, the solid electrolyte preparation apparatus 100 includes a first pressure roller assembly 1, a second pressure roller assembly 2, and a coating assembly 3; wherein, the first pressure roller assembly 1 is used to calender and convey the first film a to the second pressure roller assembly 2, and the second pressure roller assembly 2 is used to combine the first powder released by the coating assembly 3 with the first sub-film a1 or the first film a to form a first composite film c, and to thin the first composite film c.

[0037] To further explain, the first pressure roller assembly 1 and the second pressure roller assembly 2 are spaced apart, which can be understood as having a certain distance between them; the coating assembly 3 is disposed between the first pressure roller assembly 1 and the second pressure roller assembly 2, and in the vertical direction, the coating assembly 3 is located above the first pressure roller assembly 1 and the second pressure roller assembly 2; since the first pressure roller assembly 1 will convey the first film a to the second pressure roller assembly 2, the coating assembly 3 will release the first powder to the side of the first film a facing the coating assembly 3, the first powder will be spread on the side of the first film a facing the coating assembly 3, and the second pressure roller assembly 2 will press the first powder and the first film a together to form the first composite film c, and the second pressure roller assembly 2 will thin the first composite film c.

[0038] The first powder can be an electrolyte powder. After the first powder is pressed together with the first membrane a by the second pressure roller assembly 2, a first composite membrane c including the first membrane a and the second membrane b is formed. The second membrane b is an electrolyte membrane. The first membrane a can be an electrode membrane or a substrate a2, or a composite of an electrode membrane and a substrate a2.

[0039] Therefore, the solid electrolyte preparation apparatus 100 provided in this application, in which the second pressure roller assembly 2 combines the first membrane a and the first powder together to form a first composite membrane c and then thins it, can reduce the possibility of breakage when the first membrane a or the second membrane b is thinned to a preset thickness alone, thereby improving the quality of the first composite membrane c; and combining the first membrane a and the second membrane b together to form the first composite membrane c can also reduce the number of stacking steps, thereby improving production efficiency; and can also improve the alignment of the first composite membrane c, improving the alignment accuracy, thereby improving production quality.

[0040] like Figure 1 and Figure 2 As shown, in an optional embodiment, the first pressure roller assembly 1 includes a plurality of first rollers 11, which are spaced apart in a horizontal direction; specifically, the plurality of first rollers 11 are used to convey the first film a, and the roller gap between two adjacent first rollers 11 can be adjusted as needed to thin the first film a.

[0041] Further explanation: the second pressure roller assembly 2 includes a second roller 21 and a third roller 22. The third roller 22 is spaced apart from the second roller 21 and is located above the second roller 21 in the vertical direction. Specifically, the third roller 22 and the second roller 21 are spaced apart, and the third roller 22 is located above the second roller 21 in the vertical direction. A roller gap is formed between the third roller 22 and the second roller 21. The first film a and the first powder pass through the roller gap between the third roller 22 and the second roller 21, and the third roller 22 and the second roller 21 press them together to form a first composite film c. In this embodiment, the third roller 22 is located above the second roller 21 in the vertical direction, that is, the tangent between the third roller 22 and the second roller 21 is parallel to the horizontal axis. When the first powder and the first film a pass through the roller gap between the third roller 22 and the second roller 21, the first powder and the first film a can be pressed together in the horizontal direction to prevent the first powder from slipping off the first film a.

[0042] The coating assembly 3 is located between the first roller 11 and the second roller 21.

[0043] like Figure 1 and Figure 2 As shown, in an optional embodiment, the tangent between the first roller 11 and the second roller 21 near the coating assembly 3 is parallel to the horizontal axis; that is, when the first pressure roller assembly 1 delivers the first film a to the second pressure roller assembly 2, the first film a can be substantially parallel to the horizontal axis, thereby preventing the first powder released by the coating assembly 3 onto the first film a from slipping off.

[0044] In an optional embodiment, the second pressure roller assembly 2 further includes at least one fourth roller 23, which is spaced apart from the second roller 21, and the fourth roller 23 and the third roller 22 are spaced apart circumferentially from the second roller 21. Specifically, the second pressure roller assembly 2 may include one, two, or more fourth rollers 23, and multiple fourth rollers 23 and the third roller 22 are spaced apart circumferentially from the second roller 21. The fourth roller 23 is located on the side of the third roller 22 away from the coating assembly 3. A roll gap is formed between the fourth roller 23 and the second roller 21, and the first composite film c passes through the roll gap between the fourth roller 23 and the second roller 21. The fourth roller 23 and the second roller 21 can roll-form the first composite film c and also thin the first composite film c.

[0045] like Figure 1 and Figure 2As shown, in an optional embodiment, the diameter of the third roller 22 is smaller than the diameter of the second roller 21, and the diameter of the fourth roller 23 is smaller than the diameter of the second roller 21. In this embodiment, the third roller 22 and the fourth roller 23 are spaced apart from the second roller 21, occupying less space, so that the structure is more compact.

[0046] In an optional embodiment, the second pressure roller assembly 2 further includes at least one fifth roller 24, which is horizontally spaced from the second roller 21. Specifically, the second pressure roller assembly 2 may include one, two, three, or more fifth rollers 24. When the first pressure roller assembly 1 includes one fifth roller 24, which is horizontally spaced from the second roller 21, the first composite film c is conveyed between the second roller 21 and the fifth roller 24 via the fourth roller 23 and the second roller 21. After the second roller 21 and the fifth roller 24 further press the first composite film c, it is wound up by the winding assembly 6. When the second pressure roller assembly 2 includes... When there are two or more fifth rollers 24, the multiple fifth rollers 24 are spaced apart in the horizontal direction. The fifth roller 24 close to the second roller 21 is spaced apart from the second roller 21. The first composite film c is conveyed between the second roller 21 and the fifth roller 24 through the fourth roller 23 and the second roller 21. The second roller 21 and the fifth roller 24 further press the first composite film c. The first composite film c is conveyed between the multiple fifth rollers 24. The multiple fifth rollers 24 can thin the first composite film c and then wind it up by the winding assembly 6. By thinning the first composite film c through the multiple fifth rollers 24, the first film a or the second film b can reach a thinner thickness, which can avoid breakage during thinning.

[0047] The diameter of the fifth roller 24 is the same as the diameter of the second roller 21.

[0048] like Figure 1 and Figure 2 As shown, in an optional embodiment, the second pressure roller assembly 2 further includes a fourth roller 23 and at least one fifth roller 24, the fourth roller 23 being spaced apart from the second roller 21, the fourth roller 23 being spaced apart from the third roller 22 along the circumference of the second roller 21, and the fifth roller 24 being spaced apart from the second roller 21 in the horizontal direction.

[0049] Specifically, the fourth roller 23 is located on the side of the third roller 22 away from the coating component 3; wherein, a roll gap is formed between the fourth roller 23 and the second roller 21, and the first composite film c passes through the roll gap between the fourth roller 23 and the second roller 21. The fourth roller 23 and the second roller 21 can roll-form the first composite film c and also thin the first composite film c; the fifth roller 24 is arranged horizontally spaced from the second roller 21, and the fourth roller 23 and the fifth roller 24 have no contact relationship.

[0050] like Figure 1 and Figure 2 As shown, further explanation is provided: the line connecting the center of the third roller 22 and the center of the second roller 21 is the first line A; the line connecting the center of the fourth roller 23 and the center of the second roller 21 is the second line B; and the second line B and the first line A form an angle M, where M is an acute angle. Specifically, the center of the third roller 22 refers to the center of the radial section of the third roller 22, the center of the second roller 21 refers to the center of the radial section of the second roller 21, and the center of the fourth roller 23 refers to the center of the radial section of the fourth roller 23. The line connecting the center of the third roller 22 and the center of the second roller 21 is the first line A; the line connecting the center of the fourth roller 23 and the center of the second roller 21 is the second line B; and the first line A and the second line B form an angle M, where M is an acute angle. In this embodiment, the position of the fourth roller 23 can avoid mutual interference with the fifth roller 24.

[0051] like Figure 1 As shown, in an optional embodiment, the solid electrolyte preparation apparatus 100 further includes a feeding assembly 4, which is located above two adjacent first rollers 11 in the vertical direction. Specifically, a dropping area 12 is formed between two adjacent first rollers 11 at the end of the first pressure roller assembly 1 away from the feeding assembly 4. Since the multiple first rollers 11 are spaced apart in the horizontal direction, the dropping area 12 faces upward in the vertical direction, and the feeding assembly 4 is located above the dropping area 12 in the vertical direction. The feeding assembly 4 is used to release the second powder into the dropping area 12, and the two first rollers 11 compress the second powder located in the dropping area 12 into a first membrane a or a first sub-membrane a1.

[0052] The second powder can be electrode powder.

[0053] In one embodiment of the solid electrolyte preparation apparatus 100 including the unwinding assembly 5, the first membrane a includes a first sub-membrane a1 and a substrate a2. The feeding assembly 4 releases the second powder into the dropping area 12, and the two first rollers 11 compress the second powder located in the dropping area 12 into the first sub-membrane a1. In another embodiment of the solid electrolyte preparation apparatus 100 not including the unwinding assembly 5, the feeding assembly 4 releases the second powder into the dropping area 12, and the two first rollers 11 compress the second powder located in the dropping area 12 into the first membrane a.

[0054] like Figure 2 As shown, in an embodiment where the solid electrolyte preparation apparatus 100 includes an unwinding assembly 5, the solid electrolyte preparation apparatus 100 further includes an unwinding assembly 5, which is disposed between two adjacent first rollers 11, and is spaced apart from the unloading assembly 4. Specifically, the unwinding assembly 5 and the unloading assembly 4 are spaced apart, meaning that the substrate a2 released by the unwinding assembly 5 is conveyed between two adjacent first rollers 11, and these two adjacent first rollers 11 are different from the two adjacent first rollers 11 with the material dropping area 12 formed. In this embodiment, the unwinding assembly 5 releases the substrate a2 and conveys it between two adjacent first rollers 11, which combine the first sub-film a1 and the substrate a2 together to form the first film a, which can reduce the number of stacking times, thereby improving production efficiency, and can also prevent the first sub-film a1 or the second film b from breaking when the first composite film c is thinned in the subsequent process.

[0055] 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:

[0056] S1. The first pressure roller assembly 1 conveys and rolls the first diaphragm a to the second pressure roller assembly 2;

[0057] S2, The coating component 3 releases the first powder onto the side of the first diaphragm a facing the coating component 3;

[0058] S3. The second pressure roller assembly 2 combines the first film a with the first powder to form a first composite film c including the first film a and the second film b, and thins the first composite film c.

[0059] like Figure 1 and Figure 2As shown, the first pressure roller assembly 1 is used to calender and convey the first film a to the second pressure roller assembly 2. The coating assembly 3 is located between the first pressure roller assembly 1 and the second pressure roller assembly 2. The coating assembly 3 releases the first powder to the side of the first film a facing the coating assembly 3. The first powder and the first film a are pressed together by the second pressure roller assembly 2 to form a first composite film c. The second pressure roller assembly 2 also thins the first composite film c.

[0060] In an optional embodiment, the first diaphragm a includes a first sub-diaphragm a1 and a substrate a2; in S1, the unwinding assembly 5 releases the substrate a2 to the first pressure roller assembly 1, and the first pressure roller assembly 1 combines the first sub-diaphragm a1 and the substrate a2 together to form the first diaphragm a; specifically, the unwinding assembly 5 is used to release the substrate a2, which is conveyed to the first pressure roller assembly 1, and the first pressure roller assembly 1 combines the first sub-diaphragm a1 and the substrate a2 together to form the first diaphragm a; in this embodiment, the number of stacking operations can be reduced, thereby improving production efficiency.

[0061] like Figure 3 As shown, in an optional embodiment, the first sub-film a1 is an electrode film, and the second film b is an electrolyte film. In this embodiment, the thickness of the electrolyte film needs to be reduced. If the electrolyte film is reduced alone, it will cause the electrolyte film to break. Therefore, the first sub-film a1, the substrate a2, and the second film b are first combined to form a first composite film c. Then, the first composite film c is reduced so that the thickness of the second film b reaches a preset thickness. Since the electrode film and the substrate a2 have a certain thickness, the breakage of the electrolyte film 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 film and the electrolyte film, improve the alignment accuracy, and thus improve the production quality.

[0062] In one optional embodiment, the substrate a2 is a current collector; in this embodiment, the first sub-film a1 is combined with the current collector, and it is no longer necessary to stack the first sub-film a1 and the second film b with the current collector, thereby reducing process steps and improving work efficiency.

[0063] In another alternative embodiment, the substrate a2f is a release film; in this embodiment, the first sub-film a1 is laminated with the release film, and subsequently, the first sub-film a1 and the second film b can be laminated with other films or foils as needed. After lamination, the release film can be peeled off.

[0064] 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 and a second pressure roller assembly are arranged at intervals; A coating assembly is disposed between the first pressure roller assembly and the second pressure roller assembly, and is located above the first pressure roller assembly and the second pressure roller assembly in the vertical direction.

2. The solid electrolyte preparation apparatus according to claim 1, characterized in that, The first pressure roller assembly includes a plurality of first rollers, which are spaced apart in a horizontal direction; The second pressure roller assembly includes a second roller and a third roller, wherein the third roller is spaced apart from the second roller and is located above the second roller in the vertical direction.

3. The solid electrolyte preparation apparatus according to claim 2, characterized in that, The tangent between the first roller and the second roller near the coating assembly is parallel to the horizontal axis.

4. The solid electrolyte preparation apparatus according to claim 2, characterized in that, The second pressure roller assembly further includes at least one fourth roller, which is spaced apart from the second roller and is spaced apart from the third roller along the circumference of the second roller.

5. The solid electrolyte preparation apparatus according to claim 4, characterized in that, The diameter of the third roller is smaller than the diameter of the second roller, and the diameter of the fourth roller is smaller than the diameter of the second roller.

6. The solid electrolyte preparation apparatus according to claim 2, characterized in that, The second pressure roller assembly further includes at least one fifth roller, which is spaced horizontally from the second roller.

7. The solid electrolyte preparation apparatus according to claim 2, characterized in that, The second pressure roller assembly further includes a fourth roller and at least one fifth roller, the fourth roller being spaced apart from the second roller, the fourth roller being spaced apart from the third roller along the circumference of the second roller, and the fifth roller being spaced apart from the second roller along the horizontal direction; The line connecting the center of the third roller and the center of the second roller is the first line, and the line connecting the center of the fourth roller and the center of the second roller is the second line. An angle M is formed between the second line and the first line, and M is an acute angle.

8. The solid electrolyte preparation apparatus according to claim 2, characterized in that, The solid electrolyte preparation apparatus further includes a feeding assembly, which is located vertically above the space between two adjacent first rollers.

9. The solid electrolyte preparation apparatus according to claim 8, characterized in that, The solid electrolyte preparation apparatus further includes an unwinding assembly, which is disposed between two adjacent first rollers, and the unwinding assembly is spaced apart from the unloading assembly.

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