Powder extrusion die head and dry-method electrode extrusion equipment

Abstract

The utility model relates to a powder extrusion die head and dry-method electrode extrusion equipment, and belongs to the technical field of dry-method electrode extrusion equipment.The powder extrusion die head is arranged on a shell of the dry-method electrode extrusion equipment, a material channel for containing powder is formed in the shell, and the powder extrusion die head comprises a top cover, a strip-shaped hole die head and a plurality of connecting assemblies; an extrusion channel used for extruding powder is formed in the top cover, the strip-shaped hole die head and the shell are arranged at two ports of the top cover correspondingly, and detachable connection between the top cover and the shell is achieved through the multiple connecting assemblies. According to the powder extrusion die head and the dry-method electrode extrusion equipment, when the strip-shaped hole die head is blocked, the top cover and the shell can be rapidly separated by opening the connecting assembly, a worker can conveniently and rapidly clean the strip-shaped hole die head, and normal use of the dry-method electrode extrusion equipment is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of dry electrode extrusion equipment, and in particular to a powder extrusion die head and dry electrode extrusion equipment. Background Art

[0002] The production process of battery electrodes includes wet process and dry process. The organic solvents used in the wet process have disadvantages such as high energy consumption, heavy pollution, and limited electrode thickness. The dry process can avoid the use of solvents when preparing lithium batteries. It has incomparable advantages over the wet process in reducing battery costs and improving battery performance.

[0003] The screw for dry electrode powder extrusion film formation is generally used in conjunction with an extrusion die. However, the extrusion dies on the market are mainly used in the molding process of flowing slurry or molten polymer. There are few extrusion dies for dry electrode materials. After the extrusion die has been used for a period of time, the die part is easily blocked by powder, which affects the normal operation of the molding die, shortens the service life of the equipment, and reduces the quality and output of the film. Utility Model Content

[0004] Based on this, it is necessary to provide a powder extrusion die and a dry electrode extrusion device to solve the technical problem in the prior art that powder easily clogs the die.

[0005] To this end, according to one aspect of the present application, a powder extrusion die is provided, which is arranged on a housing of a dry electrode extrusion device, and the housing is formed with a material channel for accommodating powder. The powder extrusion die includes:

[0006] The top cover is formed with an extrusion channel for extruding powder, and the top cover is detachably covered at the port of the shell, and the extrusion channel and the material channel are connected together;

[0007] A strip hole die head is provided at the end of the extrusion channel away from the shell, and the strip hole die head is provided with a long strip through hole for converting the powder into a film; and

[0008] Multiple connecting components are evenly arranged along the connection between the top cover and the shell. The connecting components include a connecting block, a mounting bracket, a linear drive component and a limit block. The connecting block is arranged on the outer peripheral surface of the top cover, and part of the connecting block protrudes from the end surface of the top cover. The part of the connecting block protruding from the end surface of the top cover is provided with a limit hole. The mounting bracket is arranged on the outer peripheral surface of the shell corresponding to the connecting block, and the part of the connecting block provided with the limit hole is inserted into the mounting bracket. The linear drive component is arranged on the mounting bracket. The linear drive component has a driving shaft pointing to the shell. The limit block is arranged on the driving shaft. The linear drive component drives the limit block to enter or exit the limit hole.

[0009] Optionally, the powder extrusion die further includes a sealing ring disposed between the shell and the top cover.

[0010] Optionally, an annular groove adapted to fit the sealing ring is provided on the end surface of the top cover for covering the shell, and the sealing ring is provided in the annular groove.

[0011] Optionally, the powder extrusion die further comprises a screen die for screening the powder, the screen die is provided with a plurality of screen holes, and the screen die is arranged on the side of the strip hole die facing the extrusion channel.

[0012] Optionally, the plurality of sieve holes are arranged in multiple rows and columns on the sieve die head.

[0013] Optionally, the cross section of the sieve hole is rectangular.

[0014] Optionally, the cross section of the extrusion channel gradually decreases from one end corresponding to the shell to one end corresponding to the strip hole die head.

[0015] Optionally, the linear drive member is a cylinder.

[0016] Optionally, the mounting bracket includes:

[0017] a first U-shaped plate fixed to the outer circumference of the housing, the first U-shaped plate and the housing enclosing a first space, the linear drive member being located in the first space and fixed to the first U-shaped plate; and

[0018] The second U-shaped plate is arranged in the first space between the linear drive member and the shell. The second U-shaped plate is fixed to the outer peripheral surface of the shell. The second U-shaped plate and the shell enclose a second space for accommodating the connecting block. The second U-shaped plate is provided with an avoidance hole connecting the first space and the second space. The avoidance hole is used to avoid the drive shaft and the limit block.

[0019] According to another aspect of the present application, a dry electrode extrusion device is provided, comprising:

[0020] The shell is formed with a material channel for accommodating the powder;

[0021] A feeding device is provided on the side of the shell and is used to transport powder into the material channel;

[0022] A screw extrusion assembly is provided at one end of the material channel, and the screw is used to extrude the powder toward the other end of the material channel; and

[0023] The powder extrusion die head as mentioned above is detachably arranged at the end of the material channel away from the screw extrusion assembly.

[0024] The beneficial effects of the powder extrusion die and dry electrode extrusion equipment provided by the present application are: compared with the prior art, the powder extrusion die of the present application is arranged on the shell of the dry electrode extrusion equipment, and the shell forms a material channel for accommodating the powder. The powder extrusion die includes a top cover, a bar hole die and multiple connecting components. The top cover forms an extrusion channel for extruding the powder. The bar hole die and the shell are respectively arranged at the two ports of the top cover. The multiple connecting components realize a detachable connection between the top cover and the shell. When the bar hole die is blocked, the top cover can be quickly separated from the shell by opening the connecting component. The staff can clean the bar hole die conveniently and quickly to ensure the normal use of the dry electrode extrusion equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the dry electrode extrusion equipment provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the exploded structure of the dry electrode extrusion equipment provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the explosion structure of a powder extrusion die head provided in an embodiment of the present application;

[0029] Figure 4 Schematic diagram of the exploded structure of the connection assembly of the powder extrusion die provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Top cover; 110. Extrusion channel; 120. Annular groove;

[0032] 2. Strip hole die head; 210. Long strip through hole;

[0033] 3. Connecting assembly; 310. Connecting block; 311. Limiting hole; 320. Mounting frame; 321. First U-shaped plate; 322. Second U-shaped plate; 3221. Avoidance hole; 330. Linear drive member; 340. Limiting block;

[0034] 4. Sealing ring;

[0035] 5. Screen die head; 510, screen hole;

[0036] 100, powder extrusion die head; 200, housing; 300, feeding device; 400, screw extrusion assembly;

[0037] 1000. Dry electrode extrusion equipment. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0044] According to one aspect of the present application, an embodiment of the present application provides a powder extrusion die head 100, please refer to Figures 1 to 4 The powder extrusion die 100 is arranged on the shell 200 of the dry electrode extrusion equipment 1000, and the shell 200 is formed with a material channel for accommodating powder. The powder extrusion die 100 includes a top cover 1, a strip hole die 2 and a plurality of connecting components 3. The top cover 1 is formed with an extrusion channel 110 for extruding powder. The top cover 1 can be detachably covered at the port of the shell 200, and the extrusion channel 110 and the material channel are connected together; the strip hole die 2 is arranged at the port of the extrusion channel 110 away from the shell 200, and the strip hole die 2 is provided with a long strip through hole 210 for converting powder into a film body; a plurality of connecting components 3 are evenly arranged along the connection between the top cover 1 and the shell 200, and the connecting component 3 includes a connecting The connecting block 310, the mounting bracket 320, the linear drive member 330 and the limit block 340, the connecting block 310 is arranged on the outer peripheral surface of the top cover 1, part of the connecting block 310 protrudes from the end surface of the top cover 1, and the part of the connecting block 310 protruding from the end surface of the top cover 1 is provided with a limit hole 311, the mounting bracket 320 is arranged on the outer peripheral surface of the shell 200 corresponding to the connecting block 310, the part of the connecting block 310 provided with the limit hole 311 is inserted into the mounting bracket 320, the linear drive member 330 is arranged on the mounting bracket 320, the linear drive member 330 has a drive shaft pointing to the shell 200, the limit block 340 is arranged on the drive shaft, and the linear drive member 330 drives the limit block 340 to enter or exit the limit hole 311.

[0045] In an embodiment of the present application, the powder extrusion die 100 is arranged on the shell 200 of the dry electrode extrusion equipment 1000, and the shell 200 is formed with a material channel for accommodating the powder. The powder extrusion die 100 includes a top cover 1, a bar hole die 2 and a plurality of connecting components 3. The top cover 1 is formed with an extrusion channel 110 for extruding the powder. The bar hole die 2 and the shell 200 are respectively arranged at two ports of the top cover 1. The plurality of connecting components 3 realize a detachable connection between the top cover 1 and the shell 200. When the bar hole die 2 is blocked, the top cover 1 can be quickly separated from the shell 200 by opening the connecting component 3, and the staff can clean the bar hole die 2 conveniently and quickly.

[0046] In one embodiment, please refer to Figure 2 and Figure 3 The powder extrusion die head 100 also includes a sealing ring 4 arranged between the shell 200 and the top cover 1. The sealing ring can improve the sealing between the shell 200 and the top cover 1, avoid leakage of powder in the shell 200 and waste of resources, and avoid external dust or liquid from entering the shell 200 and contaminating the powder, thereby improving the film forming quality of the powder.

[0047] In one embodiment, see Figure 3 The top cover 1 is used to cover the end surface of the shell 200 and is provided with an annular groove 120 adapted to the sealing ring 4. The sealing ring 4 is arranged in the annular groove 120. The annular groove 120 can limit the sealing ring 4, better fix the sealing ring 4, and ensure the sealing effect.

[0048] In one embodiment, see Figure 3 The powder extrusion die 100 further includes a screen die 5 for screening the powder. The screen die 5 is provided with a plurality of screen holes 510 . The screen die 5 is arranged on the side of the strip hole die 2 facing the extrusion channel 110 .

[0049] In one embodiment, see Figure 3 , multiple sieve holes 510 are arranged in multiple rows and columns on the sieve die 5, or multiple sieve holes 510 are combined into multiple circles on the sieve die 5, which is not limited here.

[0050] In one embodiment, see Figure 3 The cross section of the sieve holes 510 is rectangular or circular. It is understood that large aggregates of powder are usually spherical. When the cross section of the sieve holes 510 is rectangular, even if large aggregates block the sieve holes 510, some pores will still remain at the corners of the sieve holes 510, and a small amount of normal powder may continue to pass through the pores.

[0051] In this way, the present application performs two extrusion moldings on the dough-like powder material through the screen die 5 and the strip hole die 2. The first square hole extrusion die can screen and isolate large agglomerates, improve the quality of the die after film formation, and meet production needs.

[0052] In one embodiment, please refer to Figures 1 to 3 The cross-section of the extrusion channel 110 gradually decreases from one end corresponding to the shell 200 to one end corresponding to the strip hole die 2. The volume of the shell 200 at the strip hole die 2 is small, thereby increasing the extrusion force at the strip hole die 2 and improving the powder film forming quality.

[0053] In one embodiment, the linear drive member 330 is a cylinder. Cylinder drive has the advantages of high efficiency, low cost and high safety.

[0054] In one embodiment, see Figure 4 The mounting frame 320 includes a first U-shaped plate 321 and a second U-shaped plate 322. The first U-shaped plate 321 is fixed to the outer peripheral surface of the shell 200. The first U-shaped plate 321 and the shell 200 enclose a first space. The linear drive member 330 is in the first space and fixed on the first U-shaped plate 321; the second U-shaped plate 322 is arranged in the first space between the linear drive member 330 and the shell 200. The second U-shaped plate 322 is fixed to the outer peripheral surface of the shell 200. The second U-shaped plate 322 and the shell 200 enclose a second space for accommodating the connecting block 310. The second U-shaped plate 322 is provided with an avoidance hole 3221 connecting the first space and the second space. The avoidance hole 3221 is used to avoid the drive shaft and the limit block 340.

[0055] According to another aspect of this application, please also refer to Figure 1 and Figure 2 , an embodiment of the present application also provides a dry electrode extrusion device 1000, which includes a shell 200, a feeding device 300, a screw extrusion assembly 400 and the powder extrusion die 100 as described above, the shell 200 is formed with a material channel for accommodating powder, the feeding device 300 is arranged on the side of the shell 200, and the feeding device 300 is used to transport powder into the material channel; the screw extrusion assembly 400 is arranged at one end of the material channel, and the screw is used to extrude the powder to the other end of the material channel, and the powder extrusion die 100 as described above is detachably arranged at the end of the material channel away from the screw extrusion assembly 400.

[0056] In an embodiment of the present application, the dry electrode extrusion equipment 1000 includes a shell 200, a feeding device 300, a screw extrusion assembly 400 and the powder extrusion die 100 as described above. When the powder extrusion die 100 is blocked, the connecting assembly 3 of the powder extrusion die 100 can be opened to quickly separate the top cover 1 from the shell 200. The staff can clean the strip hole die 2 conveniently and quickly to ensure the normal use of the dry electrode extrusion equipment 1000.

[0057] In one embodiment, the feeding device 300 includes a feeding hopper, an electric push rod, a cover plate, a driving motor and a stirring blade. The feeding hopper is fixedly connected to the top of the shell 200. The top of the feeding hopper is fixedly connected to the electric push rod. The output end of the electric push rod is fixedly connected to the cover plate. The driving motor is fixedly connected to the top center of the cover plate. The bottom end of the rotating shaft of the driving motor extends to the outside of the cover plate and is fixedly connected to the stirring blade.

[0058] The electric push rod can drive the cover plate to move up and down, so that the motor and stirring blades on the cover plate can move up and down. The motor can drive the stirring blades to rotate, mix the electrode powder materials, break up agglomerates, and promote binder fiberization.

[0059] Among them, a feeding port is opened inside the cover plate and is located on the side of the motor. The feeding port is used to feed powder into the feed hopper.

[0060] In one embodiment, the screw extrusion assembly 400 includes a base plate, a threaded conveying rod and a rotating motor. The end of the shell 200 is fixedly connected to the base plate, and the threaded conveying rod is movably connected inside the base plate. One end of the threaded conveying rod extends to the outside of the base plate, and the other end of the threaded conveying rod extends to the inside of the shell 200.

[0061] Among them, the bottom plate and the shell 200 are sealed together, and the threaded conveying rod can deliver the evenly stirred raw materials in the feed hopper into the top cover 1 through the shell 200, and finally extrude the raw materials into a film through the screen die 5 and the strip hole die 2 at the end of the top cover 1.

[0062] In addition, a bracket can be connected to the bottom of the shell 200, which can stably support the shell 200; a rotating motor can be installed on the bracket, and one end of the threaded conveying rod is connected to the output end of the rotating motor, which can provide stable power for the threaded conveying rod.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A powder extrusion die head, characterized in that: It is arranged on the housing of the dry electrode extrusion equipment, and the housing is formed with a material channel for accommodating powder. The powder extrusion die head includes: A top cover is formed with an extrusion channel for extruding the powder, the top cover is detachably covered at the port of the shell, and the extrusion channel and the material channel are connected together; a strip hole die head, which is arranged at the end of the extrusion channel away from the shell, and the strip hole die head is provided with a long strip through hole for converting the powder into a film; and A plurality of connecting components are evenly arranged along the connection between the top cover and the shell, and the connecting components include a connecting block, a mounting bracket, a linear drive member and a limit block. The connecting block is arranged on the outer peripheral surface of the top cover, and part of the connecting block protrudes from the end surface of the top cover. The part of the connecting block protruding from the end surface of the top cover is provided with a limit hole. The mounting bracket is arranged on the outer peripheral surface of the shell corresponding to the connecting block, and the part of the connecting block provided with the limit hole is inserted into the mounting bracket. The linear drive member is arranged on the mounting bracket, and the linear drive member has a driving shaft pointing to the shell. The limit block is arranged on the driving shaft, and the linear drive member drives the limit block to enter or disengage from the limit hole.

2. The powder extrusion die head according to claim 1, characterized in that: The powder extrusion die head further includes a sealing ring arranged between the shell and the top cover.

3. The powder extrusion die head according to claim 2, characterized in that: The top cover is used to cover the end surface of the shell and is provided with an annular groove adapted to the sealing ring, and the sealing ring is arranged in the annular groove.

4. The powder extrusion die according to any one of claims 1 to 3, characterized in that: The powder extrusion die head further comprises a screen die head for screening the powder, wherein the screen die head is provided with a plurality of screen holes, and the screen die head is arranged on the side of the strip hole die head facing the extrusion channel.

5. The powder extrusion die head according to claim 4, characterized in that: The plurality of sieve holes are arranged in multiple rows and columns on the sieve die head.

6. The powder extrusion die head according to claim 4, characterized in that: The cross section of the sieve hole is rectangular.

7. The powder extrusion die head according to any one of claims 1 to 3, characterized in that: The cross section of the extrusion channel gradually decreases from an end corresponding to the shell to an end corresponding to the strip hole die head.

8. The powder extrusion die head according to any one of claims 1 to 3, characterized in that: The linear drive component is a cylinder.

9. The powder extrusion die head according to any one of claims 1 to 3, characterized in that: The mounting frame comprises: a first U-shaped plate fixed to the outer circumferential surface of the housing, the first U-shaped plate and the housing enclosing a first space, the linear drive member being located in the first space and fixed to the first U-shaped plate; and A second U-shaped plate is arranged in the first space between the linear drive member and the shell, and the second U-shaped plate is fixed to the outer peripheral surface of the shell. The second U-shaped plate and the shell enclose a second space for accommodating the connecting block, and the second U-shaped plate is provided with an avoidance hole connecting the first space and the second space, and the avoidance hole is used to avoid the drive shaft and the limit block.

10. A dry electrode extrusion device, characterized in that: include: The shell is formed with a material channel for accommodating the powder; A feeding device is provided on a side surface of the shell, and is used to transport powder into the material channel; A screw extrusion assembly is provided at one end of the material channel, and the screw is used to extrude the powder toward the other end of the material channel; as well as The powder extrusion die head according to any one of claims 1 to 9 is detachably arranged at a port of the material channel away from the screw extrusion assembly.

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