Stirring device for electrode material manufacturing

Abstract

The utility model relates to the field of lithium battery production equipment, and discloses a stirring device for manufacturing an electrode material, which comprises a tank body, the upper part of the tank body is a feed end, the lower part of the tank body is provided with a discharge end, a stirring assembly is arranged in the tank body, the discharge end comprises a discharge pipe, an extrusion screw is rotatably connected in the discharge pipe, and the discharge pipe is provided with a discharge port. Continuous spiral plates are arranged on the side wall of the extrusion screw rod, and a one-way transmission assembly is arranged between the extrusion screw rod and the tail end of the stirring assembly, so that the extrusion screw rod keeps static when the stirring assembly rotates clockwise, and the extrusion screw rod and the stirring assembly synchronously rotate when the stirring assembly rotates anticlockwise; according to the stirring device, the stirring efficiency and effect of mixed materials can be improved, air wrapped in the electrode slurry can be extruded out when the stirred electrode slurry is discharged, and uniformity deviation occurring when the surface of an electrode plate is coated with the slurry subsequently is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery production equipment field, concretely relates to a stirring device for electrode material manufacturing. BACKGROUND

[0002] The mixing process is an important process in the electrode production of lithium battery, and in this process, the positive and negative electrode raw materials are respectively mixed with conductive agent, thickening agent, solvent, adhesive and the like according to a specific proportion, and then stirred, so as to become uniform slurry, facilitating the use in the next coating process. The traditional mixing is carried out in a stirring device, such as a planetary stirrer, a magnetic stirrer, etc. For example, a double planetary stirring device for lithium battery electrode material is disclosed in Chinese Utility Model Patent No. CN208340627U, which comprises a feeding hopper, a stirring cylinder connected to the bottom end of the feeding hopper, and a rotating seat installed at the bottom end of the stirring cylinder, etc. The stirring mechanism of the double planetary stirring shaft is used to realize rapid stirring, and the rotating seat is used to realize feeding.

[0003] In the process of stirring the material by the existing stirring device, the final slurry is easy to wrap air, which leads to poor uniformity of the slurry in the later coating process, and affects the quality of the electrode product. UTILITY MODEL CONTENT

[0004] The utility model provides a stirring device for electrode material manufacturing to solve at least one of the above technical problems.

[0005] The utility model adopts the technical scheme of a stirring device for electrode material manufacturing, which comprises a tank body, the upper part of the tank body is a feeding end, the lower part is provided with a discharging end, a stirring assembly is arranged in the tank body, the discharging end comprises a discharging pipe, an extrusion screw is rotatably connected in the discharging pipe, a continuous spiral plate is arranged on the side wall of the extrusion screw, a one-way transmission assembly is arranged between the extrusion screw and the end of the stirring assembly, so that the extrusion screw remains stationary when the stirring assembly rotates clockwise, and the extrusion screw rotates synchronously with the stirring assembly when the stirring assembly rotates counterclockwise.

[0006] In the process of clockwise stirring of the mixed material in the tank body by the stirring mechanism, the extrusion screw in the discharging pipe remains stationary under the action of the one-way transmission assembly, so that the spiral plate seals the discharging pipe, preventing the material in the tank body from being discharged along the discharging pipe, until the material in the tank body is uniformly mixed. By controlling the counterclockwise rotation of the stirring mechanism to stir the slurry in the tank body in the reverse direction, the extrusion screw rotates synchronously with the stirring mechanism under the action of the one-way transmission assembly, and the spiral plate extrudes the material in the tank body along the discharging pipe. In the extrusion gap between the spiral plates, the material is pressurized to expel the air wrapped in the slurry during the conveying of the material, preventing the uniformity deviation of the subsequent slurry coating on the surface of the electrode sheet.

[0007] As preferred, the one-way transmission assembly comprises a connecting shaft arranged at the end of the stirring assembly, the lower end of the connecting shaft is provided with a connecting groove, the inner wall of the connecting groove is provided with a ratchet wheel, the upper end of the extrusion screw is provided with a plug-in end matched with the connecting groove, and the side wall of the plug-in end is provided with a ratchet matched with the ratchet wheel. When the connecting shaft rotates clockwise relative to the extrusion screw along with the stirring assembly, the ratchet abuts against the ratchet wheel, thereby realizing synchronous rotation of the extrusion screw and the stirring mechanism; on the contrary, when the connecting shaft rotates counterclockwise relative to the extrusion screw along with the stirring assembly, the ratchet has no interference effect on the ratchet wheel, at this time the extrusion screw remains in a stationary state.

[0008] As preferred, the discharge gap of the spiral plate gradually decreases along the discharge direction of the discharge pipe. This design can effectively increase the compactness of the slurry during discharge, expel the mixed air in the slurry, and further ensure the quality of the electrode product.

[0009] As preferred, the stirring assembly comprises a rotating shaft connected to the inner cavity of the tank body, a plurality of stirring blades for stirring the material in the middle part of the inner cavity of the tank body are arranged at intervals along the rotating shaft, and the first stirring blade is arranged obliquely to push the material in the middle part of the inner cavity of the stirring tank outward. The arrangement of the stirring blades can mix and stir the material in the middle part of the tank body, and the plurality of stirring blades arranged at vertical intervals can stir the material at different heights to ensure uniform and thorough mixing of the material at different heights. The material in the middle part of the tank body is stirred by the stirring blades and then moved to the periphery, and the components at the periphery gather again to the middle part of the tank body under the action of their own fluidity and gravity, thereby realizing the mixing of the material.

[0010] As preferred, the stirring assembly further comprises two cross beams symmetrically arranged at the upper end of the rotating shaft, the ends of the two cross beams away from the rotating shaft are both connected with a first stirring shaft vertically downward, and a second stirring shaft is connected between the lower ends of the two first stirring shafts, and the second stirring shaft is designed in accordance with the space below the inner cavity of the tank body. The first stirring shaft can be arranged to stir the material outside the inner cavity of the tank body, and the second stirring shaft can be arranged to mix and stir the material outside the bottom of the inner cavity of the tank body, which cooperates with the stirring blades to stir the material in the middle part of the tank body, thereby realizing sufficient and efficient mixing of the material in each region of the tank body.

[0011] As preferred, the stirring assembly further comprises a stirring scraper fixed at the upper end and the lower end of the two first stirring shafts respectively, and the outer side of the stirring scraper is attached to the inner wall of the tank body. The stirring scraper can further stir the material outside the inner cavity of the tank body, and make the material outside the inner cavity of the tank body roll up and down, cooperate with the stirring blades to push the material outward, and thus make the material mix more uniformly and efficiently. In addition, the stirring scraper can clean the slurry attached to the inner wall of the tank body when the uniformly mixed slurry is discharged, so as to prevent the motor material from remaining on the inner wall of the tank body.

[0012] As preferred, the inclination angles of the stirring blades vertically adjacent to each other are different. Such design can improve the mixing and stirring effect of the multiple groups of stirring blades rotating synchronously on the material, and further improve the efficiency of material mixing.

[0013] As preferred, the second stirring shaft is provided with a guide plate at the lower end, and the guide plate is located above the upper opening of the discharge pipe. The guide plate can guide the material near the upper opening of the discharge pipe, and the guide plate can hang the material near the upper opening of the discharge pipe into the discharge pipe during the rotation of the second stirring shaft, so as to facilitate the rapid discharge of the slurry.

[0014] As preferred, the discharge pipe is provided with a discharge port at the lower end, and the finally extruded and compacted slurry is discharged from the discharge port to the coating equipment for the coating process of the electrode material.

[0015] As preferred, the tank body is provided with a motor seat at the upper end, and a forward and reverse motor is installed on the motor seat, and the output end of the forward and reverse motor is fixedly connected with the rotating shaft. The forward and reverse motor can provide power for the rotation of the rotating shaft, and facilitate the flexible switching of the rotating shaft.

[0016] Due to the adoption of the above technical scheme, the application has the following beneficial effects:

[0017] During the clockwise stirring of the mixed material in the tank body by the stirring mechanism, the extrusion screw in the discharge pipe remains stationary under the action of the one-way transmission assembly, so as to seal the discharge pipe by the spiral plate, prevent the material in the tank body from being discharged along the discharge pipe, and mix the material in the tank body uniformly. By controlling the counterclockwise rotation of the stirring mechanism to stir the slurry in the tank body reversely, the extrusion screw rotates synchronously with the stirring mechanism under the action of the one-way transmission assembly, the spiral plate extrudes the material in the tank body along the discharge pipe, and the material enters the extrusion gap between the spiral plates, so as to be pressurized to make the spiral plate expel the air wrapped in the slurry during the conveying of the material, and prevent the uniformity deviation of the subsequent slurry coating on the surface of the electrode sheet. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1It is one of structure schematic views of the embodiment of the present application.

[0019] Figure 2 It is a structure schematic view of the stirring assembly in the present application.

[0020] Figure 3 It is the present application Figure 1 It is an enlarged view of part A in the present application.

[0021] Figure 4 It is a structure schematic view of the one-way transmission assembly in the present application.

[0022] Figure 5 It is the second structure schematic view of the embodiment of the present application.

[0023] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application.

[0024] In the drawings:

[0025] 1, tank body; 2, forward and reverse motor; 21, rotating shaft; 22, stirring blade; 23, cross beam; 231, first stirring shaft; 232, second stirring shaft; 24, stirring scraper; 25, guide plate; 3, discharge pipe; 31, discharge port; 4, extrusion screw; 41, spiral plate; 5, connecting shaft; 51, connecting groove; 52, ratchet wheel; 6, plug-in end; 61, ratchet. DETAILED DESCRIPTION

[0026] In order to more clearly explain the overall concept of the present application, the following will be described in detail in an exemplary manner with reference to the drawings.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0028] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0029] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection, still can be communication;Can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relationship.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0030] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be that first and second features directly contact, or first and second features indirectly contact by intermediate medium.In the description of the present specification, the description of reference terms "embodiment", "example", "an embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] Referring to Figures 1 to 5 An electrode material manufacturing stirring device, including jar body 1, the upper portion of jar body 1 is feed end, and the lower portion is equipped with discharge end, and the inside of jar body 1 is equipped with stirring assembly, and the discharge end includes discharge pipe 3, and the discharge pipe 3 is rotatably connected with extrusion screw 4, and the side wall of extrusion screw 4 is equipped with continuous spiral plate 41, and the extrusion screw 4 and the tail end of stirring assembly are equipped with one-way transmission assembly, to make extrusion screw 4 keep still when stirring assembly rotates clockwise, and extrusion screw 4 and stirring assembly rotate synchronously when stirring assembly rotates counterclockwise.

[0032] The lithium battery positive electrode material is a mixed material meeting multiple media. When mixing, the staff member introduces the materials of different components into the tank 1 through the feeding mechanism, and stirs the mixed material into uniform slurry through the stirring assembly. During the clockwise stirring of the mixed material in the tank 1 by the stirring mechanism, the extrusion screw 4 in the discharge pipe 3 remains static under the action of the one-way transmission assembly, so that the spiral plate 41 seals the discharge pipe 3. During the process, the material in the tank 1 is prevented from being discharged along the discharge pipe 3, until the material in the tank 1 is uniformly mixed. After the material is uniformly mixed, the slurry in the tank 1 is stirred in the reverse direction by controlling the stirring mechanism to rotate counterclockwise, which can further increase the mixing effect of the slurry. At the same time, the extrusion screw 4 rotates synchronously with the stirring mechanism under the action of the one-way transmission assembly, and the spiral plate 41 extrudes the material in the tank 1 along the discharge pipe 3. When the material enters the extrusion gap between the spiral plates 41, it is pressurized to make the spiral plate 41 expel the air wrapped in the slurry during the conveying of the material, so that the slurry does not contain bubbles and pores, preventing the uniformity deviation of the subsequent slurry coating on the surface of the electrode sheet, laying a foundation for the smooth progress of the subsequent coating process and increasing the quality of the electrode sheet product.

[0033] As a preferred example of the one-way transmission assembly, refer to Figure 3 and Figure 4 The one-way transmission assembly includes a connecting shaft 5 arranged at the end of the stirring assembly. The lower end of the connecting shaft 5 is provided with a connecting groove 51, and the inner wall of the connecting groove 51 is provided with a ratchet wheel 52. The upper end of the extrusion screw 4 is provided with a plug-in end 6 matched with the connecting groove 51, and the side wall of the plug-in end 6 is provided with a ratchet tooth 61 matched with the ratchet wheel 52. Refer to Figure 4 When the connecting shaft 5 rotates clockwise with the stirring assembly relative to the extrusion screw 4, the ratchet tooth 61 abuts against the ratchet wheel 52, thereby realizing the synchronous rotation of the extrusion screw 4 and the stirring mechanism. Conversely, when the connecting shaft 5 rotates counterclockwise with the stirring assembly relative to the extrusion screw 4, the ratchet tooth 61 does not have an interference effect on the ratchet wheel 52, and the extrusion screw 4 remains in a static state.

[0034] As a preferred embodiment of the spiral plate 41, refer to Figure 1 The discharge gap of the spiral plate 41 gradually decreases along the discharge direction of the discharge pipe 3. This design can effectively increase the density of the slurry during the discharge of the slurry, expel the mixed air in the slurry, and further ensure the quality of the electrode product.

[0035] As a specific embodiment of the stirring assembly, refer to Figure 1 and Figure 2, the stirring assembly comprises a rotating shaft 21 rotatably connected in the inner cavity of the tank body 1, a plurality of stirring blades 22 are arranged along the rotating shaft 21 in the axial direction and are used for stirring the material in the middle part of the inner cavity of the tank body 1, and the first stirring blade 22 is arranged obliquely to push the material in the middle part of the inner cavity of the tank body 1 outward. Preferably, a motor seat is arranged at the upper end of the tank body 1, a forward and reverse motor 2 is arranged on the motor seat, and the output end of the forward and reverse motor 2 is fixedly connected with the rotating shaft 21. The forward and reverse motor 2 can provide power for the rotation of the rotating shaft 21, and the rotating shaft 21 can be conveniently switched between forward rotation and reverse rotation. The arrangement of the stirring blades 22 can mix and stir the material in the middle part of the tank body 1, the plurality of stirring blades 22 arranged vertically and spaced apart can stir the material at different heights, and the material at different heights can be uniformly and efficiently mixed. The stirring blades 22 stir the material in the middle part of the tank body 1 to the periphery, and then the components at the periphery are pushed to the middle part of the tank body 1 again under the action of the self-flowing property and gravity, so that the material is mixed.

[0036] Preferably, the inclination angles of the stirring blades 22 arranged vertically adjacent to each other are different. This design can improve the mixing and stirring effect of the plurality of stirring blades 22 on the material, and further improve the efficiency of the material mixing.

[0037] Further, the stirring assembly further comprises two cross beams 23 symmetrically arranged at the upper end of the rotating shaft 21, the ends of the two cross beams 23 away from the rotating shaft 21 are connected with first stirring shafts 231 arranged vertically downward, and the lower ends of the two first stirring shafts 231 are connected with a second stirring shaft 232, and the second stirring shaft 232 is designed in the shape of the lower space in the inner cavity of the tank body 1. The first stirring shaft 231 can be arranged to stir the material outside the inner cavity of the tank body 1, the second stirring shaft 232 can be arranged to mix and stir the material outside the bottom of the inner cavity of the tank body 1, and the material in the middle part of the tank body 1 can be stirred by the stirring blades 22, so that the material in each region of the tank body 1 can be fully and efficiently mixed.

[0038] Further, the stirring assembly further comprises a stirring scraper 24, the two ends of the stirring scraper 24 are fixed to the upper end and the lower end of the two first stirring shafts 231 respectively, and the outer side of the stirring scraper 24 is attached to the inner wall of the tank body 1. The arrangement of the stirring scraper 24 can further stir the material outside the inner cavity of the tank body 1, and can also make the material outside the inner cavity of the tank body 1 roll up and down, cooperate with the stirring blades 22 to push the material outward, and further make the material mix more uniformly and efficiently. In addition, when the uniformly mixed slurry is discharged, the stirring scraper 24 can clean the slurry attached to the inner wall of the tank body 1, so as to prevent the residual motor material on the inner wall of the tank body 1.

[0039] As a preferred embodiment of the present application, referring to Figure 2 and Figure 3The lower end of the second stirring shaft 232 is provided with a material guide plate 25, which is located above the upper opening of the discharging pipe 3. The material guide plate 25 can guide the material near the upper opening of the discharging pipe 3, and the material near the upper opening of the discharging pipe 3 can be hung into the discharging pipe 3 during the rotation of the material guide plate 25 with the second stirring shaft 232, so that the slurry can be quickly discharged; the lower end of the discharging pipe 3 is provided with a discharging opening 31, and the slurry extruded and compacted is finally discharged from the discharging opening 31 to the coating equipment for the coating process of the electrode material.

[0040] The parts not described in the utility model can be realized by using or referring to the existing technology.

[0041] Each of the embodiments in the specification adopts a progressive manner for description, and the same and similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0042] The above is only the embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the claim range of the utility model.

Claims

1. An agitating device for manufacturing an electrode material, comprising a tank body (1) having a feed end at the upper portion and a discharge end at the lower portion, characterized in that, The tank body (1) is provided with a stirring assembly, the discharge end comprises a discharge pipe (3), a extrusion screw (4) is rotatably connected in the discharge pipe (3), the side wall of the extrusion screw (4) is provided with a continuous spiral plate (41), a one-way transmission assembly is arranged between the extrusion screw (4) and the end of the stirring assembly, so that the extrusion screw (4) remains stationary when the stirring assembly rotates clockwise, and the extrusion screw (4) rotates synchronously with the stirring assembly when the stirring assembly rotates counterclockwise.

2. The stirring device for manufacturing an electrode material according to claim 1, wherein The one-way transmission assembly comprises a connecting shaft (5) arranged at the end of the stirring assembly, the lower end of the connecting shaft (5) is provided with a connecting groove (51), the inner wall of the connecting groove (51) is provided with a ratchet wheel (52), the upper end of the extrusion screw (4) is provided with a plug-in end (6) matched with the connecting groove (51), and the side wall of the plug-in end (6) is provided with a ratchet tooth (61) matched with the ratchet wheel (52).

3. The stirring device for manufacturing an electrode material according to claim 1, characterized by The discharge gap of the spiral plate (41) gradually decreases along the discharge direction of the discharge pipe (3).

4. The stirring device for manufacturing an electrode material according to claim 1, characterized by The stirring assembly comprises a rotating shaft (21) rotatably connected in the inner cavity of the tank body (1), a plurality of stirring blades (22) for stirring the material in the middle part of the inner cavity of the tank body (1) are arranged at intervals along the rotating shaft (21), and the stirring blades (22) are arranged obliquely to push the material in the middle part of the inner cavity of the tank body (1) outward.

5. The stirring device for manufacturing an electrode material according to claim 4, wherein The stirring assembly further comprises two horizontal beams (23) symmetrically arranged at the upper end of the rotating shaft (21), the ends of the two horizontal beams (23) away from the rotating shaft (21) are both connected with a first stirring shaft (231) vertically downward, and a second stirring shaft (232) is connected between the lower ends of the two first stirring shafts (231), wherein the second stirring shaft (232) is designed in accordance with the space of the lower part of the inner cavity of the tank body (1).

6. The stirring device for manufacturing an electrode material according to claim 5, wherein The stirring assembly further comprises a stirring scraper (24), the two ends of the stirring scraper (24) are fixed to the upper end and the lower end of the two first stirring shafts (231) respectively, and the outer side of the stirring scraper (24) is attached to the inner wall of the tank body (1).

7. The stirring device for manufacturing an electrode material according to any one of claims 4 to 6, characterized by The inclination angles of the stirring blades (22) adjacent in the vertical direction are different.

8. The stirring device for manufacturing an electrode material according to claim 5, wherein The lower end of the second stirring shaft (232) is provided with a guide plate (25), and the guide plate (25) is located above the upper opening of the discharge pipe (3).

9. The stirring device for manufacturing an electrode material according to claim 1, wherein The lower end of the discharge pipe (3) is provided with a discharge port (31).

10. The stirring device for manufacturing an electrode material according to claim 4, characterized by The upper end of the tank body (1) is provided with a motor seat, a forward and reverse motor (2) is mounted on the motor seat, and the output end of the forward and reverse motor (2) is fixedly connected with the rotating shaft (21).

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