Dry process equipment for manufacturing positive powder of alkaline-manganese button cell and granulation process

Abstract

The application relates to the field of alkaline-manganese button cell manufacturing, in particular to a dry-method alkaline-manganese button cell positive electrode powder manufacturing device and a granulation process, which comprises the following steps: S1, powder mixing, mixing electrolytic manganese dioxide, graphite and acetylene black into a positive electrode powder; S2, tablet pressing, extruding the positive electrode powder to shape the positive electrode powder into a positive electrode powder tablet; S3, granulation, crushing the positive electrode powder tablet to shape the positive electrode powder tablet into a positive electrode granule; and S4, sieving, sieving the positive electrode granule, and if the positive electrode granule meets the particle size requirement, separating the positive electrode granule into a finished product of a positive electrode material used for manufacturing alkaline-manganese button cells. The application has the effects of simplifying a production process and reducing the labor intensity of workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of alkaline-manganese button cell manufacturing, in particular to a dry method for manufacturing positive electrode powder of alkaline-manganese button cell and a granulation process. BACKGROUND

[0002] A button cell is a kind of battery commonly used to power small electrical devices, which usually includes a positive electrode shell, a positive electrode material, a negative electrode material, a negative electrode shell, a separator and a sealing ring. The positive electrode material is filled in the inside of the positive electrode shell, the negative electrode material is filled in the inside of the negative electrode shell, the separator is located between the positive electrode material and the negative electrode material, and the sealing ring is located between the positive electrode shell and the negative electrode shell, so that the positive electrode material, the negative electrode material and the separator are sealed between the positive electrode shell and the negative electrode shell.

[0003] In the existing manufacturing process of the positive electrode material, the powder mixing, tablet pressing, granulation, sieving and drying processes are required to prepare the positive electrode powder meeting the specific gravity requirement and the particle size distribution requirement, so as to facilitate the subsequent preparation of the positive electrode material. In the powder mixing process, a certain amount of powder adjusting liquid is usually added. For example, in the powder mixing process of lithium-manganese button cell, polytetrafluoroethylene emulsion is added as the powder adjusting liquid to make the positive electrode powder more easily pressed into tablets, so as to increase the specific gravity of the positive electrode material and increase the energy density. In the subsequent drying process, the water in the powder adjusting liquid is removed to ensure the service life of the button cell and reduce the occurrence of electric leakage.

[0004] In view of the related technology in the above, in order to ensure that the water in the positive electrode powder is fully removed, the drying process accounts for a high proportion in the production cycle, which has a certain adverse effect on the production efficiency of the button cell. SUMMARY

[0005] In order to simplify the production process and reduce the labor intensity of workers, the present application provides a dry method for granulating positive electrode powder of alkaline-manganese button cell.

[0006] The dry method for granulating positive electrode powder of alkaline-manganese button cell provided by the present application adopts the following technical solution:

[0007] A dry method for granulating positive electrode powder of alkaline-manganese button cell, comprising the following steps:

[0008] S1, mixing powder, mixing electrolytic manganese dioxide, graphite and acetylene black into positive electrode powder;

[0009] S2, tablet pressing, extruding the positive electrode powder to shape the positive electrode powder into positive electrode powder tablets;

[0010] S3, granulation, crushing the positive electrode powder tablets to shape the positive electrode powder tablets into positive electrode particles;

[0011] S4, sieving, sieving the positive electrode particles, if the positive electrode particles meet the particle size requirement, separating into finished products of the positive electrode material for manufacturing alkaline manganese button batteries.

[0012] By adopting the above technical scheme, the electrolytic manganese dioxide, graphite and acetylene black are mixed into the positive electrode powder, without adding the powder adjusting liquid, the positive electrode powder is sequentially subjected to tabletting, granulation and sieving, without drying the positive electrode particles sieved to produce the finished products of the positive electrode material for manufacturing alkaline manganese button batteries, the production process is simplified, the labor intensity of workers is reduced, thereby facilitating to ensure the production efficiency of the alkaline manganese button batteries.

[0013] Optionally, the S2 and S3 steps are continuously performed inside the dry process manufacturing equipment.

[0014] By adopting the above technical scheme, in the granulation process, the positive electrode powder is continuously performed inside the dry process manufacturing equipment, and is not easy to be emitted to the outside of the dry process manufacturing equipment, thereby facilitating to reduce the situation that the positive electrode powder flies to the workshop, thereby facilitating to ensure the environment of the production workshop.

[0015] Optionally, in the S4 step, if the positive electrode particles do not meet the particle size requirement, the S2 and S3 steps are performed again until the particle size requirement is met.

[0016] By adopting the above technical scheme, it is favorable to reduce the loss in the granulation process, and to reduce the adverse effects caused by the gradual loss of water in the multiple circulation processes.

[0017] A dry process alkaline manganese button battery positive electrode powder manufacturing equipment for implementing the above alkaline manganese button battery positive electrode powder granulation process, comprising a tablet press, a crusher, a granulator and a sieving machine, the tablet press is used for tabletting the positive electrode powder, the crusher is used for crushing the positive electrode tablet, the granulator is used for granulating the crushed positive electrode tablet, and the sieving machine is used for sieving the positive electrode particles, and the tablet press, the crusher, the granulator and the sieving machine are sequentially connected.

[0018] By adopting the above technical scheme, after the tablet press tabletts the positive electrode powder, the positive electrode powder is directly conveyed to the crusher for crushing, then conveyed to the granulator for granulation, and finally conveyed to the sieving machine for sieving, thereby reducing the situation that the workers transfer and carry between the stations, and facilitating to reduce the labor intensity of the workers.

[0019] Optionally, the tablet press comprises a tablet press shell and a pair of roller assemblies, the tablet press shell is internally provided with a tablet press chamber, the pair of roller assemblies comprises extrusion roller bodies and a roller body motor, the extrusion roller bodies are provided in plurality, the plurality of extrusion roller bodies are located inside the tablet press chamber and are rotationally fitted to the tablet press shell, the roller body motor is used to drive the roller body driving member to rotate, the plurality of extrusion roller bodies are divided into groups, and the plurality of groups of extrusion roller bodies are distributed along the vertical direction, and each group is provided with two extrusion roller bodies distributed along the horizontal direction.

[0020] By adopting the above technical scheme, the plurality of extrusion roller bodies successively extrude the positive electrode powder, which is beneficial to fully extruding the relatively dry positive electrode powder into tablets, thereby ensuring that the specific gravity of the positive electrode material meets the requirements.

[0021] Optionally, the extrusion roller bodies are slidingly fitted to the tablet press shell along the horizontal direction, and the tablet press further comprises an adjusting assembly, which is used to adjust the spacing between the two extrusion roller bodies in the same group.

[0022] By adopting the above technical scheme, it is convenient to adjust the spacing between the two extrusion roller bodies in the same group according to production requirements, thereby adjusting the extrusion force on the positive electrode powder, so as to ensure the compactness of the positive electrode particles under the premise of reducing the breaking of electrolytic manganese dioxide.

[0023] Optionally, the adjusting assembly comprises adjusting sliding blocks, an adjusting lead screw and an adjusting motor, the adjusting sliding blocks are provided in two, the two adjusting sliding blocks are respectively rotationally fitted to the two extrusion roller bodies in the same group, and the two adjusting sliding blocks are slidingly fitted to the tablet press shell along the horizontal direction, the adjusting lead screw is rotationally fitted to the tablet press shell, the thread directions of the two ends of the adjusting lead screw are respectively counterclockwise and clockwise, the two adjusting sliding blocks are respectively threadedly fitted to the two ends of the adjusting lead screw, and the adjusting motor is used to drive the adjusting lead screw to rotate.

[0024] By adopting the above technical scheme, the adjusting motor drives the adjusting lead screw to rotate, thereby causing the two adjusting sliding blocks to move towards each other or away from each other, thereby adjusting the spacing between the two extrusion roller bodies, which is reliable in structure and high in precision, and is convenient for accurately adjusting the spacing of the plurality of groups of extrusion roller bodies to gradually decrease along the vertical downward direction, thereby gradually increasing the extrusion force on the positive electrode powder and more uniformly increasing the specific gravity of the positive electrode powder.

[0025] Optionally, the tablet press further comprises a limiting assembly, the limiting assembly comprises limiting blocks and a limiting driving element, the limiting blocks are provided with a plurality of limiting blocks, the plurality of limiting blocks are slidably fitted in the horizontal direction in the tablet press shell, the plurality of limiting blocks are located between the two groups of roller assemblies, the plurality of limiting blocks are divided into a plurality of groups, the number of limiting blocks in each group is two, the two limiting blocks in the same group are distributed in the horizontal direction, and the limiting driving element is used to drive the two limiting blocks in the same group to move in the horizontal direction.

[0026] By adopting the above technical scheme, on the one hand, the limiting blocks limit and guide the positive electrode powder sheet located between the two groups of extrusion rollers, so that the positive electrode powder sheet is more easily aligned to enter the gap between the next group of extrusion rollers, and then the positive electrode powder sheet is more easily further extruded, thereby facilitating to ensure the compactness of the positive electrode particles. On the other hand, by moving the limiting blocks towards the extrusion rollers, the limiting blocks will be tightly attached to the surface of the extrusion rollers, thereby scraping off the positive electrode powder adhering to the surface of the extrusion rollers without affecting the continuous pressing of the tablet, so as to reduce the production loss of the positive electrode powder and the maintenance workload of the extrusion rollers.

[0027] Optionally, the limiting assembly is provided with two limiting assemblies, the two limiting assemblies are distributed in the vertical direction, the limiting blocks are rotationally fitted with transmission rods, and the limiting driving element can be telescopic, and the two ends of the limiting driving element are respectively rotationally fitted with the transmission rods of the two limiting assemblies.

[0028] By adopting the above technical scheme, when the limiting driving element is telescopic, the limiting blocks will be moved in the horizontal direction through the transmission rods, thereby simultaneously adjusting the spacing between the limiting blocks of the two limiting assemblies, or making the limiting blocks of the two limiting assemblies respectively close to the extrusion rollers and scrape off the adhering positive electrode powder, thereby reducing the installation and wiring difficulty of the power source.

[0029] Optionally, the limiting block is provided with a powder scraping rib, and the powder scraping rib is inclinedly arranged towards the extrusion roller.

[0030] By adopting the above technical scheme, after the limiting block is close to the extrusion roller, the powder scraping rib abuts against the surface of the extrusion roller, thereby scraping off the adhering positive electrode powder through the inclinedly arranged powder scraping rib.

[0031] In summary, the present application has at least one of the following beneficial technical effects:

[0032] 1. After mixing electrolytic manganese dioxide, graphite and acetylene black into positive electrode powder, without adding powder adjusting liquid, the positive electrode powder is sequentially pressed, granulated and sieved, without drying the positive electrode particles sieved to produce finished products of positive electrode material for manufacturing alkaline manganese button cells, thereby simplifying the production process, reducing the labor intensity of workers, and facilitating to ensure the production efficiency of alkaline manganese button cells.

[0033] 2. The positive electrode powder is continuously processed inside the dry method manufacturing device and is not easily emitted to the outside of the dry method manufacturing device, which is conducive to reducing the occurrence of positive electrode powder flying to the workshop, thereby facilitating the environmental protection of the production workshop;

[0034] 3. The positive electrode powder is sequentially extruded by a plurality of extrusion roller bodies, which is conducive to fully extruding the relatively dry positive electrode powder into a sheet, thereby ensuring that the specific gravity of the positive electrode material meets the requirements;

[0035] 4. On the one hand, the limiting block limits and guides the positive electrode powder sheet between the two groups of extrusion roller bodies, so that the positive electrode powder sheet is more easily aligned to enter the gap between the next group of extrusion roller bodies, and then the positive electrode powder sheet is more easily further extruded, thereby facilitating the density of the positive electrode particles. On the other hand, by moving the limiting block towards the extrusion roller body, the limiting block will be tightly attached to the surface of the extrusion roller body, thereby scraping off the positive electrode powder adhering to the surface of the extrusion roller body without affecting the continuous pressing of the tablet, thereby reducing the production loss of the positive electrode powder and the maintenance workload of the extrusion roller body. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a flowchart of the dry granulation process of the positive electrode powder of the alkaline manganese button cell according to the first embodiment of the present application.

[0037] Figure 2 is a schematic diagram of the overall dry method manufacturing device for the positive electrode powder of the alkaline manganese button cell according to the second embodiment of the present application.

[0038] Figure 3 is a schematic diagram of the overall dry method manufacturing device for the positive electrode powder of the alkaline manganese button cell according to the third embodiment of the present application.

[0039] Figure 4 is a cross-sectional view of the tablet press according to the third embodiment of the present application.

[0040] Figure 5 is a first overall schematic diagram of the pair of roller assemblies according to the third embodiment of the present application.

[0041] Figure 6 is a second overall schematic diagram of the pair of roller assemblies according to the third embodiment of the present application.

[0042] Figure 7 is a schematic diagram of the limiting assembly according to the third embodiment of the present application.

[0043] Explanation of reference signs: 1, tablet press; 11, screw extruder; 12, first discharge pipe; 2, crusher; 21, second discharge pipe; 3, granulator; 31, third discharge pipe; 4, sifter; 5, tablet press shell; 501, tablet press input port; 502, tablet press output port; 503, tablet press chamber; 51, roller body sliding table; 6, roller assembly; 61, extrusion roller body; 62, roller motor; 7, adjustment assembly; 71, adjustment sliding block; 72, adjustment screw; 73, adjustment motor; 8, limiting assembly; 81, limiting block; 811, powder scraping rib; 812, transmission rod; 82, limiting driving piece. DETAILED DESCRIPTION

[0044] The following will be described in detail with reference to the accompanying drawings. Figures 1-7 The application is further described in detail.

[0045] Example one:

[0046] The application discloses a dry granulation process for alkaline manganese button cell positive electrode powder. Referring to the drawings, Figure 1 The dry granulation process for alkaline manganese button cell positive electrode powder comprises the following steps:

[0047] S1, mixing powder, mixing electrolytic manganese dioxide, graphite and acetylene black into positive electrode powder.

[0048] S2, tablet pressing, extruding the positive electrode powder to shape the positive electrode powder into positive electrode powder sheet.

[0049] S3, granulation, crushing the positive electrode powder sheet to shape the positive electrode powder sheet into positive electrode granules.

[0050] The steps S2 and S3 are continuously performed inside the dry manufacturing equipment, that is, the positive electrode powder, the positive electrode powder sheet and the positive electrode granules are all performed inside the closed shell during the tablet pressing and the granulation, and the positive electrode powder sheet is directly transferred to the granulation station inside the dry manufacturing equipment without being transferred to other granulation equipment by workers for granulation, so as to reduce the flying dust condition.

[0051] S4, sifting, screening the positive electrode granules, if the positive electrode granules meet the particle size requirement, separating them into finished products of the positive electrode material for manufacturing alkaline manganese button cells; if the positive electrode granules do not meet the particle size requirement, reperforming the steps S2 and S3 until the particle size requirement is met.

[0052] S5, detection, sampling and detecting the specific gravity of the positive electrode granules, if the specific gravity of the positive electrode granules is greater than or equal to 1.55, determining that the batch is a good product, and if the specific gravity of the positive electrode granules is less than 1.55, determining that the batch is a bad product. For the positive electrode granules determined as the bad product, the steps S2 and S3 need to be reperformed until the particle size and the specific gravity requirements are met.

[0053] The implementation principle of the dry granulation process of the positive electrode powder of the alkaline-manganese button cell according to the embodiment of the application is that: the positive electrode powder of the positive electrode material is prepared without adding a powder adjusting liquid, and the water content in the positive electrode powder does not need to be dried and removed, so that the production process is simplified, the labor intensity of workers is reduced, and the production efficiency of the alkaline-manganese button cell is ensured.

[0054] Embodiment two:

[0055] The embodiment of the application discloses a dry alkaline-manganese button cell positive electrode powder manufacturing device for implementing the dry granulation process of the positive electrode powder of the alkaline-manganese button cell according to the embodiment one.

[0056] With reference to Figure 2 The dry alkaline-manganese button cell positive electrode powder manufacturing device comprises a rack, a tablet press 1, a crusher 2, a granulator 3 and a screening machine 4, the tablet press 1, the granulator 3 and the screening machine 4 are all installed on the rack, and the tablet press 1, the crusher 2, the granulator 3 and the screening machine 4 are sequentially distributed downward.

[0057] The tablet press 1 extrudes the positive electrode powder through two electric rollers distributed in the vertical direction. The top of the rack is fixedly installed with a screw extruder 11, and the top of the screw extruder 11 is fixedly installed with a feeding hopper for feeding the positive electrode powder prepared in the S1 step. The output port of the screw extruder 11 faces the gap between the two electric rollers, so as to extrude the positive electrode powder between the two electric rollers and reduce the accumulation of the positive electrode powder between the two electric rollers.

[0058] The output end of the tablet press 1 is connected to the input end of the top of the crusher 2 through a first discharge pipe 12. The crusher 2 crushes the tablet-shaped positive electrode powder into smaller tablet-shaped or block-shaped positive electrode powder through multi-directional pressing, so as to facilitate subsequent granulation.

[0059] The output end of the crusher 2 is connected to the input end of the top of the granulator 3 through a second discharge pipe 21. The granulator 3 extrudes the crushed positive electrode powder and makes the positive electrode powder pass through a mesh plate with a plurality of mesh holes, so that the crushed positive electrode powder is formed into positive electrode particles corresponding to the mesh holes.

[0060] The output end of the granulator 3 is connected to the input end of the top of the screening machine 4 through the third discharge pipe 31. The screening machine 4 screens the positive electrode particles through multiple layers of screens, the pore sizes of each screen decrease in turn from top to bottom, and each screen is vibrated through a vibrating table, so that the particle size of the positive electrode particles in the screening machine 4 decreases in turn along the vertical downward direction. And, the discharge port is arranged at the position of each layer of screen. When the positive electrode particles that do not meet the requirements are discharged from the discharge port, they will be transported by the circulating device to the input end of the tablet press 1 and reprocessed in turn through the tablet press 1, the crusher 2, the granulator 3 and the screening machine 4. The circulating device is used to lift the positive electrode particles that do not meet the requirements to the position of the tablet press 1, and can be lifted by negative pressure, conveying belt or spiral auger, etc.

[0061] Example three:

[0062] The application example three discloses a dry method of manufacturing equipment for positive electrode powder of alkaline manganese button cell, referring to Figure 3 The difference between the example two is that the specific setting of the tablet press 1 is different.

[0063] Referring to Figure 4 The tablet press 1 includes a tablet press shell 5, a pair of roller assemblies 6, an adjusting assembly 7 and a limiting assembly 8. The tablet press shell 5 is provided with a tablet input port 501, a tablet output port 502 and a tablet cavity 503. The tablet input port 501 is located at the top of the tablet press shell 5, the tablet output port 502 is located at the bottom of the tablet press shell 5, and the tablet cavity 503 is located in the interior of the tablet press shell 5. The tablet input port 501 and the tablet output port 502 are both communicated with the tablet cavity 503, so that the positive electrode powder can be transported into the interior of the tablet cavity 503 through the tablet input port 501, and the positive electrode powder tablets formed in the tablet cavity 503 can be discharged through the tablet output port 502.

[0064] Referring to Figure 4 And Figure 5The roller assembly 6 comprises six extrusion roller bodies 61 and six roller body motors 62, and the six extrusion roller bodies 61 and the six roller body motors 62 are arranged in one-to-one correspondence. The six extrusion roller bodies 61 are located inside the tabletting chamber 503, and the six extrusion roller bodies 61 are divided into three groups, the three groups of extrusion roller bodies 61 are distributed along the vertical direction, the number of each group of extrusion roller bodies 61 is two, and the two extrusion roller bodies 61 in the same group are distributed along the horizontal direction. One end of the extrusion roller body 61 is rotatably connected with the roller sliding table 51, so that the extrusion roller body 61 is rotatably connected with the tabletting shell through the roller sliding table 51. The roller sliding table 51 is slidably connected with the tabletting shell 5 along the horizontal direction, the stator of the roller body motor 62 corresponding to the extrusion roller body 61 is fixedly arranged on the roller sliding table 51, and the output shaft of the roller body motor 62 is coaxially fixedly connected with the extrusion roller body 61, so that the roller body motor 62 and the extrusion roller body 61 can slide along the horizontal direction through the roller sliding table 51, and the roller body motor 62 can drive the extrusion roller body 61 to rotate.

[0065] Referring to Figure 5 and Figure 6 The adjusting assembly 7 is provided with three, and the three adjusting assemblies 7 are arranged in one-to-one correspondence with the three groups of extrusion roller bodies 61. The roller adjusting assembly 7 comprises an adjusting sliding block 71, an adjusting screw 72 and an adjusting motor 73. The adjusting sliding block 71 is provided with two, and the two adjusting sliding blocks 71 are slidably connected with the tabletting shell 5 along the horizontal direction, and the two adjusting sliding blocks 71 are rotatably connected with the two extrusion roller bodies 61 in the same group, so that the adjusting sliding block 71 can drive the extrusion roller body 61 to move along the horizontal direction when the extrusion roller body 61 rotates.

[0066] The adjusting screw 72 is rotatably connected with the tabletting shell 5, and the adjusting screw 72 is arranged along the distribution direction of the two adjusting sliding blocks 71. The screw threads at the two ends of the adjusting screw 72 are in counterclockwise direction and clockwise direction respectively, that is, the screw threads at the two ends of the adjusting screw 72 are opposite. The two ends of the adjusting screw 72 are arranged in the two adjusting sliding blocks 71 and are threadedly connected with the two adjusting sliding blocks 71, so that when the adjusting screw 72 rotates, the two extrusion roller bodies 61 will be driven by the adjusting sliding block 71 to move close to or away from each other, and then the distance between the two extrusion roller bodies 61 in the same group is adjusted by the rotation of the adjusting screw 72, so as to facilitate the adjustment of the extrusion degree of the positive electrode powder. The stator of the adjusting motor 73 is fixedly connected with the tabletting shell 5, and the rotor of the adjusting motor 73 is coaxially fixedly connected with the adjusting screw 72, so that the adjusting motor 73 can drive the adjusting screw 72 to rotate.

[0067] Referring to Figure 6 and Figure 7The limiting assembly 8 comprises limiting blocks 81 and a limiting driving member 82. The limiting blocks 81 are provided in four, and the four limiting blocks 81 are divided into two groups. The two groups of limiting blocks 81 are distributed along the vertical direction, and the two groups of limiting blocks 81 are located between the adjacent two groups of roller assemblies 6. The number of limiting blocks 81 in each group is two. The two limiting blocks 81 in the same group are distributed along the horizontal direction, and the distribution direction of the two limiting blocks 81 in the same group is consistent with the distribution direction of the two extrusion roller bodies 61 in the same group.

[0068] The cross section of the limiting block 81 is triangularly arranged, and the top and bottom of the limiting block 81 are respectively matched with the two extrusion roller bodies 61, so that the limiting block 81 can be gap-fitted with the extrusion roller body 61. The limiting block 81 is provided with two powder scraping ribs 811, and the two powder scraping ribs 811 are respectively located at the top and bottom of the limiting block 81. The powder scraping rib 811 is obliquely arranged towards the closest extrusion roller body 61, so that when the powder scraping rib 811 contacts the extrusion roller body 61, it is easier to scrape off the positive electrode powder adhering to the surface of the extrusion roller body 61. The limiting block 81 is slidingly fitted in the tablet pressing shell 5 along the horizontal direction, and the limiting driving member 82 can be telescopic, so that the distance between the two ends of the limiting driving member 82 can be increased or decreased.

[0069] The limiting driving member 82 is provided with four transmission rods 812, two of which are rotatably fitted at the top end of the limiting driving member 82 and rotatably fitted with the two limiting blocks 81 in one group, and the other two transmission rods 812 are rotatably fitted at the bottom end of the limiting driving member 82 and rotatably fitted with the two limiting blocks 81 in the other group. When the limiting driving member 82 is telescopic, the two limiting blocks 81 in the same group will move closer or farther away from each other, thereby adjusting the distance between the two limiting blocks 81, and the upper and lower groups of limiting blocks 81 will move simultaneously. In the embodiment of the application, the type of limiting driving member 82 is a double-piston cylinder, and the stator of the limiting driving member 82 is fixedly installed on the tablet pressing shell 5.

[0070] The implementation principle of the positive electrode powder manufacturing equipment for dry alkaline manganese button cells in the embodiment of the application is as follows: on the one hand, the limiting block 81 guides the positive electrode powder sheet located between the two extrusion roller bodies 61, so that the positive electrode powder sheet is more easily aligned to enter the gap between the next group of extrusion roller bodies 61, thereby further extruding the positive electrode powder sheet, thereby facilitating the guarantee of the compactness of the positive electrode particles. On the other hand, by moving the limiting block 81 towards the extrusion roller body 61, the limiting block 81 will be tightly attached to the surface of the extrusion roller body 61, thereby scraping off the positive electrode powder adhering to the surface of the extrusion roller body 61 without affecting the continuous pressing, so as to reduce the production loss of the positive electrode powder and the maintenance workload of the extrusion roller body 61.

[0071] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A dry-process alkaline manganese button cell cathode powder manufacturing equipment, characterized in that: A dry granulation process for manufacturing positive electrode powder of alkaline-manganese button cell; The dry granulation process for manufacturing positive electrode powder of alkaline-manganese button cell comprises the following steps: S1, mixing powder, mixing electrolytic manganese dioxide, graphite and acetylene black into positive electrode powder; S2, tabletting, extruding the positive electrode powder to shape the positive electrode powder into positive electrode powder tablet; S3, granulation, crushing the positive electrode powder tablet to shape the positive electrode powder tablet into positive electrode granules; S4, sieving, sieving the positive electrode granules, and separating the positive electrode granules into finished products of positive electrode material for manufacturing alkaline-manganese button cell if the positive electrode granules meet the particle size requirement; The dry granulation process for manufacturing positive electrode powder of alkaline-manganese button cell comprises the following steps: The tabletting machine (1) is used for tabletting the positive electrode powder, the crusher (2) is used for crushing the positive electrode powder tablet, the granulator (3) is used for granulating the crushed positive electrode powder tablet, and the sieving machine (4) is used for sieving the positive electrode granules. The tabletting machine (1) comprises a tabletting shell (5) and a pair of roller assemblies (6), the tabletting shell (5) is internally provided with a tabletting chamber (503), the pair of roller assemblies (6) comprises extrusion roller bodies (61) and roller body motors (62), the extrusion roller bodies (61) are provided in plurality, the plurality of extrusion roller bodies (61) are located inside the tabletting chamber (503), and are rotationally fitted to the tabletting shell (5), the roller body motors (62) are used for driving the roller body driving members to rotate, the plurality of extrusion roller bodies (61) are divided into groups, and the plurality of groups of extrusion roller bodies (61) are distributed along the vertical direction, and each group is provided with two extrusion roller bodies (61) distributed along the horizontal direction. The extrusion roller bodies (61) are slidingly fitted to the tabletting shell (5) along the horizontal direction, and the tabletting machine (1) further comprises an adjusting assembly (7) for adjusting the spacing between the two extrusion roller bodies (61) in the same group. The tabletting machine (1) further comprises a limiting assembly (8) comprising limiting blocks (81) and limiting driving members (82), the limiting blocks (81) are provided in plurality, the plurality of limiting blocks (81) are slidingly fitted to the tabletting shell (5) along the horizontal direction, the plurality of limiting blocks (81) are located between the two groups of pair of roller assemblies (6), the plurality of limiting blocks (81) are divided into groups, the number of limiting blocks (81) in each group is two, the two limiting blocks (81) in the same group are distributed along the horizontal direction, and the limiting driving members (82) are used for driving the two limiting blocks (81) in the same group to move along the horizontal direction.

2. The apparatus for manufacturing a cathode powder for dry alkaline manganese button cell batteries according to claim 1, wherein: The adjusting assembly (7) comprises adjusting sliding blocks (71), an adjusting screw rod (72) and an adjusting motor (73), two adjusting sliding blocks (71) are rotationally arranged in the same group of two extrusion roller bodies (61) respectively, and both of the adjusting sliding blocks (71) are slidingly arranged in the tablet pressing shell (5) in the horizontal direction, the adjusting screw rod (72) is rotationally arranged in the tablet pressing shell (5), the screw thread directions of the two ends of the adjusting screw rod (72) are counterclockwise and clockwise respectively, both of the adjusting sliding blocks (71) are threadedly arranged at the two ends of the adjusting screw rod (72) respectively, and the adjusting motor (73) is used for driving the adjusting screw rod (72) to rotate.

3. The apparatus for manufacturing a cathode powder for dry alkaline manganese button cell batteries according to claim 1, wherein: The limiting assemblies (8) are two, and the limiting assemblies (8) are distributed in the vertical direction, the limiting block (81) is rotationally arranged with a transmission rod (812), the limiting driving element (82) can be telescopic, and the two ends of the limiting driving element (82) are rotationally arranged with the transmission rods (812) of the two limiting assemblies (8) respectively.

4. The apparatus for manufacturing a cathode powder for dry alkaline manganese button cells according to claim 1 or 3, wherein: The limiting block (81) is provided with a powder scraping convex rib (811), and the powder scraping convex rib (811) is obliquely arranged towards the extrusion roller body (61).

5. A dry granulation process for alkaline-manganese button cell cathode powder, characterized in that: The dry method alkaline manganese button cell positive electrode powder manufacturing equipment is implemented by claim 1, and the S2 and S3 steps are continuously performed in the dry method manufacturing equipment.

6. The dry granulation process for the production of the positive electrode powder for alkaline-manganese button cell batteries according to claim 5, characterized in that: In the S4 step, if the positive electrode particles do not meet the particle size requirement, the S2 and S3 steps are performed again until the particle size requirement is met.

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