Film making device and film making production line

Abstract

The utility model discloses a film making device and a film making production line, the film making device comprises a plurality of first film forming assemblies, a plurality of second film forming assemblies, a plurality of third film forming assemblies and a plurality of third film forming assemblies, the second membrane forming compression roller set is arranged on the downstream of the multiple first membrane forming assemblies, and the second membrane forming compression roller set is used for pressing the multiple first membranes into second membranes; the first membrane forming assembly comprises a first pressing roller and a second pressing roller, the first pressing roller and the second pressing roller are adjacent to each other and form a blanking area, the first pressing roller rotates around the axis of the first pressing roller, and the second pressing roller can rotate around the roller face of the first pressing roller. According to the technical scheme provided by the invention, the strength and quality of the diaphragm can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a film-making device and a film-making production line. Background Art

[0002] In the film production process, since the powder is quantitatively fed through the silo and squeezed into a film by the pressing roller, the uniformity of the powder feeding is inconsistent, which will affect the quality and strength of the film. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a new film-making device and a film-making production line.

[0004] According to a first aspect of an embodiment of the present application, a film making device is provided, comprising:

[0005] a plurality of first membrane forming assemblies, wherein the first membrane forming assemblies are configured to press a first membrane;

[0006] a second film forming roller group, the second film forming roller group being arranged downstream of the plurality of first film forming components, and the second film forming roller group being used for pressing the plurality of first film sheets into a second film sheet;

[0007] The first film forming assembly includes a first pressing roller and a second pressing roller. The first pressing roller is adjacent to the second pressing roller and forms a blanking area. The first pressing roller rotates around its own axis, and the second pressing roller can rotate around the roller surface of the first pressing roller.

[0008] Optionally, the first diaphragm forming assembly further includes a material discharge assembly, the material discharge assembly is located upstream of the first pressing roller and the second pressing roller, and the material discharge assembly is used to convey powder to the material discharge area.

[0009] Optionally, the material discharge assembly has a material discharge port, and the material discharge port has a first extension line extending in the second direction toward the first pressing roller and the second pressing roller;

[0010] The diameter of the second pressing roller in the second direction has a second extension line, and the first extension line and the second extension line have a distance in the first direction, and the distance is located on the left or right side of the first extension line;

[0011] The first direction intersects the second direction.

[0012] Optionally, the second pressing roller rotates around its own axis, and the rotation direction of the second pressing roller around its own axis is opposite to the rotation direction of the first pressing roller around its own axis.

[0013] Optionally, the diameter of the first pressing roller is the same as the diameter of the second pressing roller.

[0014] Optionally, the second diaphragm forming roller group includes a third roller and a fourth roller, the third roller and the fourth roller are arranged at intervals along the first direction, the third roller rotates around its own axis, and the fourth roller rotates around its own axis.

[0015] Optionally, the rotation direction of the third pressing roller around its own axis is opposite to the rotation direction of the fourth pressing roller around its own axis.

[0016] Optionally, the film-making device further comprises a thinning roller assembly, wherein the thinning roller assembly is located downstream of the second film forming roller group, and the thinning roller assembly is used to thin the thickness of the second film.

[0017] Optionally, the thinning roller assembly includes a plurality of fifth rollers, the plurality of fifth rollers are arranged side by side, and two adjacent fifth rollers rotate in opposite directions around their own axes.

[0018] According to a second aspect of an embodiment of the present application, a film production line is provided, comprising the above-mentioned film making device.

[0019] One technical effect of the embodiment of the present application is that the strength and quality of the diaphragm can be improved by using multiple first diaphragm forming assemblies and second diaphragm forming roller groups.

[0020] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 It is a structural schematic diagram of a film-making device in an embodiment of the present application;

[0023] Figure 2 This is a schematic structural diagram of the first diaphragm forming assembly in an embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the structure in which the first pressing roller is located at different positions of the second pressing roller in an embodiment of the present application.

[0025] Explanation of the reference numerals: first diaphragm forming assembly 1; first pressure roller 11; second pressure roller 12; unloading assembly 13; powder material silo 131; discharge port 132; unloading area 14; second diaphragm forming pressure roller group 2; third pressure roller 21; fourth pressure roller 22; thinning pressure roller assembly 3; fifth pressure roller 31; first diaphragm 4; second diaphragm 5; first extension line a; second extension line b; spacing h. DETAILED DESCRIPTION

[0026] 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 of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] The “upstream” mentioned in the embodiments of the present application refers to the process before this process; and the “downstream” refers to the process after this process.

[0032] like Figure 1-Figure 3 As shown, according to the first aspect of an embodiment of the present application, a film making device is provided, comprising a plurality of first film forming assemblies 1 and a second film forming roller group 2, wherein the first film forming assemblies 1 are configured to press a first film 4; the second film forming roller group 2 is arranged downstream of the plurality of first film forming assemblies 1, and the second film forming roller group 2 is used to press the plurality of first film sheets 4 into a second film 5; the first film forming assembly 1 comprises a first roller 11 and a second roller 12, the first roller 11 is adjacent to the second roller 12 and forms a blanking area 14, the first roller 11 rotates around its own axis, and the second roller 12 can rotate around the roller surface of the first roller 11.

[0033] like Figure 1-Figure 2 As shown, the film making device includes a plurality of first film forming assemblies 1 and a second film forming roller group 2 .

[0034] The first membrane forming components 1 may have two, three, four or more.

[0035] Take the first diaphragm forming assembly 1 having two as an example for explanation. Figure 1As shown, the first diaphragm forming assembly 1 is used to press the first diaphragm 4 . The first diaphragm forming assembly 1 has two components. The two first diaphragm forming assemblies 1 are arranged at intervals, and each first diaphragm forming assembly 1 presses a first diaphragm 4 .

[0036] The second film forming roller group 2 is arranged downstream of the first film forming assembly 1. The second film forming roller group 2 is used to press the two first film sheets 4 into the second film sheet 5. In other words, the first film forming assembly 1 presses the first film sheet 4 into shape, and the two first film sheets 4 are transferred to the second film forming roller group 2. The second film forming roller group 2 presses the two first film sheets 4 together to form the second film sheet 5. Pressing two first film sheets 4 or multiple first film sheets 4 into one second film sheet 5 can improve the strength of the film sheet and make the film forming effect better, thereby improving the production quality of the film sheet.

[0037] like Figure 2 As shown, the first film forming assembly 1 includes a first pressing roller 11 and a second pressing roller 12 .

[0038] The first pressing roller 11 and the second pressing roller 12 are arranged adjacent to each other, and there is a roller gap between the first pressing roller 11 and the second pressing roller 12, and the roller gap is used to pass the powder, and the powder is pressed into the first membrane 4 by the first pressing roller 11 and the second pressing roller 12. The first pressing roller 11 and the second pressing roller 12 are both cylindrical, and the first pressing roller 11 and the second pressing roller 12 are arranged adjacent to each other. The roller surface of the first pressing roller 11 is an arc surface, and the roller surface of the second pressing roller 12 is an arc surface. A storage space is formed between the roller surface of the first pressing roller 11 and the roller surface of the second pressing roller 12, and the storage space is the blanking area 14. The blanking area 14 is used to store the powder, and the blanking area 14 is connected to the roller gap. The powder will enter the roller gap in the blanking area 14, so that the powder is pressed into the first membrane 4 by the first pressing roller 11 and the second pressing roller 12.

[0039] In the prior art, different powders have different particle diameters. The larger the particle diameter of the powder, the smaller the amount of powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12, and the thinner the first membrane 4 pressed by the first pressing roller 11 and the second pressing roller 12; if the particle diameter of the powder is smaller, the larger the amount of powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12, the thicker the first membrane 4 pressed by the first pressing roller 11 and the second pressing roller 12, which will affect the production quality of the first membrane 4.

[0040] To further explain, the first pressing roller 11 can rotate around its own axis, and the second pressing roller 12 can rotate around the roller surface of the first pressing roller 11. Since the blanking area 14 is formed by the accommodating space between the roller surface of the first pressing roller 11 and the roller surface of the second pressing roller 12, when the second pressing roller 12 rotates around the roller surface of the first pressing roller 11, the size of the blanking area 14 can be adjusted, thereby controlling the amount of powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12.

[0041] To further illustrate, if the particle diameter of the powder is larger, the second pressing roller 12 rotates around the roller surface of the first pressing roller 11, increasing the amount of powder accommodated in the blanking area 14, thereby increasing the amount of powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12, so as to control the thickness of the first membrane 4 within the preset thickness; if the particle diameter of the powder is smaller, the second pressing roller 12 rotates around the roller surface of the first pressing roller 11, reducing the amount of powder accommodated in the blanking area 14, thereby reducing the amount of powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12, so as to control the thickness of the first membrane 4 within the preset thickness.

[0042] Therefore, the film forming device provided in the embodiment of the present application can improve the strength and quality of the film.

[0043] In an optional embodiment, the first diaphragm forming assembly 1 further includes a material discharge assembly 13 , wherein the material discharge assembly 13 is located upstream of the first pressing roller 11 and the second pressing roller 12 , and the material discharge assembly 13 is used for conveying powder to the material discharge area 14 .

[0044] like Figure 1 and Figure 2 As shown, the first diaphragm forming assembly 1 further includes a material discharge assembly 13 , which is located upstream of the first pressing roller 11 and the second pressing roller 12 , and is used for conveying powder to the material discharge area 14 .

[0045] To further explain, the unloading component 13 includes a powder silo 131, which is provided with a discharge port 132. In the second direction, the discharge port 132 of the powder silo 131 is located above the unloading area 14. Powder is placed in the powder silo 131, and the powder flows out from the discharge port 132 of the powder silo 131 and falls into the unloading area 14.

[0046] To further explain, each first diaphragm forming component 1 is provided with a blanking component 13, and different powders can be placed in the blanking component 13 of each first diaphragm forming component 1, thereby producing different first diaphragms 4, and different first diaphragms 4 are conveyed to the second diaphragm forming roller group 2 to form a second diaphragm 5, so the second diaphragm 5 can be pressed from different first diaphragms 4.

[0047] Therefore, each first diaphragm forming assembly 1 is provided with a blanking assembly 13, which can improve the compatibility of the film-making device and can manufacture second diaphragms 5 of the same material or second diaphragms 5 of different materials.

[0048] In another optional embodiment, the film forming assembly includes a blanking assembly 13, and the blanking assembly 13 includes a plurality of discharge ports 132, and one discharge port 132 corresponds to one first film forming assembly 1. In this embodiment, only the second film 5 of the same material can be manufactured, but its structure is simple and the cost is lower.

[0049] In an optional embodiment, the discharge assembly 13 has a discharge port 132, and the discharge port 132 has a first extension line a extending in the second direction toward the first pressure roller 11 and the second pressure roller 12, and the diameter of the second pressure roller 12 has a second extension line b in the second direction, and the first extension line a and the second extension line b have a spacing h in the first direction, and the spacing h is located on the left or right side of the first extension line a; the first direction intersects with the second direction.

[0050] like Figure 3 As shown, the discharge assembly 13 has a discharge port 132. In the second direction, the discharge port 132 is located above the discharge area 14. In the second direction, the discharge port 132 extends toward the discharge area 14 to form a first extension line a. The first extension line a can be extended from the edge or center point of the discharge port 132.

[0051] In the second direction, the diameter of the second pressing roller 12 has a second extension line b, which is parallel to the first extension line a. The second extension line b and the first extension line a have a spacing h in the first direction, and the spacing h is located on the left or right side of the first extension line a.

[0052] Among them, the left side or the right side is Figure 3 Left or right side of the marker.

[0053] To further illustrate, when the first pressing roller 11 and the second pressing roller 12 are arranged side by side in the first direction, the distance h between the first extension line a and the second extension line b is the largest, and the blanking area 14 can accommodate the most powder; when the second pressing roller 12 rotates along the roller surface of the first pressing roller 11, the distance h between the first extension line a and the second extension line b gradually decreases, and the blanking area 14 can accommodate non-powdered materials and also gradually decreases; if the first extension line a and the second extension line b overlap, part of the material at the discharge port 132 will not fall into the blanking area 14, so the first extension line a and the second extension line b need to have a distance h so that the powdered material can fall into the blanking area 14.

[0054] Therefore, the distance h between the first extension line a and the second extension line b is limited to limit the rotation angle of the second pressing roller 12 to prevent the powder from falling into the drop area 14 .

[0055] In an optional implementation, the second pressing roller 12 rotates around its own axis, and the rotation direction of the second pressing roller 12 around its own axis is opposite to the rotation direction of the first pressing roller 11 around its own axis.

[0056] To further illustrate, the second pressing roller 12 can rotate around its own axis, and the first pressing roller 11 can also rotate around its own axis, and the rotation direction of the second pressing roller 12 around its own axis is opposite to the rotation direction of the first pressing roller 11 around its own axis.

[0057] If the rotation direction of the first pressing roller 11 around its own axis is the same as the rotation direction of the second pressing roller 12 around its own axis, the powder located in the blanking area 14 will be driven by the first pressing roller 11 to move toward the roller gap between the first pressing roller 11 and the second pressing roller 12, while the second pressing roller 12 will drive the powder to move away from the roller gap between the first pressing roller 11 and the second pressing roller 12, thereby affecting the powder entering the roller gap between the first pressing roller 11 and the second pressing roller 12, and also affecting the film forming quality of the first membrane 4.

[0058] Therefore, the rotation direction of the first pressure roller 11 around its own axis is opposite to the rotation direction of the second pressure roller 12 around its own axis, and the direction of the friction force between the first pressure roller 11 and the first diaphragm 4 is the same as the direction of the friction force between the second pressure roller 12 and the first diaphragm 4, thereby driving the first diaphragm 4 to move along a preset direction.

[0059] In an optional embodiment, the diameter of the first pressing roller 11 is the same as the diameter of the first pressing roller 11 .

[0060] Further explanation, since the first roller 11 rotates around its own axis, the second roller 12 also rotates around its own axis. If the diameter of the first roller 11 is different from that of the second roller 12, the first roller 11 and the second roller 12 need to be adjusted to different rotation speeds, which requires a higher adjustment accuracy to make the length of the roller surface of the first roller 11 rotate the same as the length of the roller surface of the second roller 12 rotate in the same time. When the diameter of the first roller 11 is the same as that of the second roller 12, it is only necessary to make the rotation speed of the first roller 11 the same as that of the second roller 12, so that the length of the roller surface of the first roller 11 rotates the same as that of the second roller 12 in the same time. Therefore, the diameter of the first roller 11 is the same as that of the second roller 12, which facilitates the adjustment of the rotation speed of the first roller 11 and the rotation speed of the second roller 12.

[0061] In an optional embodiment, the second diaphragm forming roller group 2 includes a third roller 21 and a fourth roller 22, the third roller 21 and the fourth roller 22 are arranged at intervals along the first direction, the third roller 21 rotates around its own axis, and the fourth roller 22 rotates around its own axis.

[0062] like Figure 1 As shown, the second diaphragm forming roller group 2 includes a third roller 21 and a fourth roller 22. The third roller 21 and the fourth roller 22 are arranged at intervals along the first direction. A roller gap is formed between the third roller 21 and the fourth roller 22. The roller gap is used to pass multiple first diaphragms 4, so as to press the multiple first diaphragms 4 into second diaphragms 5 through the third roller 21 and the fourth roller 22.

[0063] Further, the third pressing roller 21 can rotate around its own axis, and the fourth pressing roller 22 can rotate around its own axis. When the plurality of first film sheets 4 are moved to the roller gap between the third pressing roller 21 and the fourth pressing roller 22, the third pressing roller 21 and the fourth pressing roller 22 rotate to press the plurality of first film sheets 4 together to form a second film sheet 5 and transfer it to the next process.

[0064] In an optional implementation, the rotation direction of the third pressing roller 21 around its own axis is opposite to the rotation direction of the fourth pressing roller 22 around its own axis.

[0065] If the rotation direction of the third pressure roller 21 around its own axis is the same as the rotation direction of the fourth pressure roller 22 around its own axis, then when the third pressure roller 21 drives the multiple first film sheets 4 to move toward the roller gap between the third pressure roller 21 and the fourth pressure roller 22, the fourth pressure roller 22 will drive the multiple first film sheets 4 to move away from the roller gap between the third pressure roller 21 and the fourth pressure roller 22, thereby affecting the multiple first film sheets 4 entering the roller gap between the third pressure roller 21 and the fourth pressure roller 22, and also affecting the film forming quality of the second film sheet 5.

[0066] Therefore, the rotation direction of the third pressing roller 21 around its own axis is opposite to the rotation direction of the fourth pressing roller 22 around its own axis, and the direction of the friction force between the third pressing roller 21 and the second diaphragm 5 is the same as the direction of the friction force between the fourth pressing roller 22 and the second diaphragm 5, thereby driving the second diaphragm 5 to move along a preset direction. The third pressing roller 21 and the fourth pressing roller 22 work together to transfer the multiple first diaphragms 4 to the roller gap between the third pressing roller 21 and the fourth pressing roller 22, and press the multiple first diaphragms 4 into the second diaphragm 5, thereby improving the film forming quality of the second diaphragm 5.

[0067] In an optional embodiment, the film making device further includes a thinning roller assembly 3 , wherein the thinning roller assembly 3 is located downstream of the second film forming roller group 2 , and the thinning roller assembly 3 is used to thin the thickness of the second film 5 .

[0068] like Figure 1As shown, the film making device also includes a thinning roller assembly 3, which is arranged downstream of the second film forming roller assembly 2. The second film 5 pressed by the second film forming roller assembly 2 will be transferred to the thinning roller assembly 3 for thinning treatment, so that the second film 5 reaches the target thickness.

[0069] In an optional implementation, the thinning roller assembly 3 includes a plurality of fifth rollers 31 , the plurality of fifth rollers 31 are arranged side by side, and two adjacent fifth rollers 31 rotate in opposite directions around their own axes.

[0070] like Figure 1 As shown, the thinning roller assembly 3 includes a plurality of fifth rollers 31, and the plurality of fifth rollers 31 are arranged side by side along the first direction, and a roller gap is provided between two adjacent fifth rollers 31. In the moving direction of the second membrane 5, the size of the roller gap between two adjacent fifth rollers 31 decreases successively, so that the thickness of the second membrane 5 can be gradually thinned to the target thickness.

[0071] Further explanation: the fifth pressing roller 31 can rotate around its own axis, and the rotation directions of two adjacent fifth pressing rollers 31 around their own axis are opposite. The direction of the friction force between one of the fifth pressing rollers 31 and the second diaphragm 5 is the same as the direction of the friction force between the other fifth pressing roller 31 and the second diaphragm 5, so that the second diaphragm 5 can be driven to move along a preset direction, that is, when one of the fifth pressing rollers 31 drives the second diaphragm 5 to move toward the roller gap between the two adjacent fifth pressing rollers 31, the other fifth pressing roller 31 will also drive the second diaphragm 5 to move toward the roller gap between the two adjacent fifth pressing rollers 31. The two adjacent fifth pressing rollers 31 work together to thin the second diaphragm 5 and move the second diaphragm 5 to the roller gap between the next two adjacent fifth pressing rollers 31. Thus, the thinning pressing roller assembly 3 can continuously and gradually thin the second diaphragm 5 to the target thickness.

[0072] It is further explained that the second membrane 5 is thinned by providing a plurality of fifth pressing rollers 31 , which has a simple structure and high connectivity and will not affect the production rhythm of the second membrane 5 .

[0073] According to a second aspect of an embodiment of the present application, a film production line is provided, comprising the above-mentioned film making device.

[0074] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A film-making device, characterized in that: include: a plurality of first membrane forming assemblies, wherein the first membrane forming assemblies are configured to press a first membrane; a second film forming roller group, the second film forming roller group being arranged downstream of the plurality of first film forming components, and the second film forming roller group being used for pressing the plurality of first film sheets into a second film sheet; The first film forming assembly includes a first pressing roller and a second pressing roller. The first pressing roller is adjacent to the second pressing roller and forms a blanking area. The first pressing roller rotates around its own axis, and the second pressing roller can rotate around the roller surface of the first pressing roller.

2. The film forming device according to claim 1, characterized in that: The first diaphragm forming assembly further comprises a material discharge assembly, the material discharge assembly is located upstream of the first pressing roller and the second pressing roller, and the material discharge assembly is used for conveying powder to the material discharge area.

3. The film forming device according to claim 2, characterized in that: The material discharge assembly has a material discharge port, and the material discharge port has a first extension line extending in the second direction toward the first pressing roller and the second pressing roller; The diameter of the second pressing roller in the second direction has a second extension line, and the first extension line and the second extension line have a distance in the first direction, and the distance is located on the left or right side of the first extension line; The first direction intersects the second direction.

4. The film forming device according to claim 1, characterized in that: The second pressing roller rotates around its own axis, and the rotation direction of the second pressing roller around its own axis is opposite to the rotation direction of the first pressing roller around its own axis.

5. The film forming device according to claim 1, characterized in that: The diameter of the first pressing roller is the same as the diameter of the second pressing roller.

6. The film forming device according to claim 1, characterized in that: The second film forming roller group includes a third roller and a fourth roller, the third roller and the fourth roller are arranged at intervals along the first direction, the third roller rotates around its own axis, and the fourth roller rotates around its own axis.

7. The film forming device according to claim 6, characterized in that: The rotation direction of the third pressing roller around its own axis is opposite to the rotation direction of the fourth pressing roller around its own axis.

8. The film forming device according to claim 1, characterized in that: The film-making device further comprises a thinning roller assembly, which is located downstream of the second film forming roller group and is used to thin the thickness of the second film.

9. The film forming device according to claim 8, characterized in that: The thinning roller assembly comprises a plurality of fifth rollers, the plurality of fifth rollers are arranged side by side, and two adjacent fifth rollers rotate in opposite directions around their own axes.

10. A film production line, characterized in that: A film-making device comprising the film-making device according to any one of claims 1 to 9.

Images