Magnetic foreign matter separation mechanism for lithium ion battery sintering paste

Abstract

Disclosed in the present application is a magnetic foreign matter separation mechanism for lithium ion battery sintering paste, comprising: a separation machine body; the separation machine body comprises an upper cover and a separation cylinder; a driving motor is arranged at the top end of the upper cover; a stirring and separating mechanism is provided in an inner cavity of the separation cylinder; the stirring and separating mechanism comprises a planetary gear set, stirring shafts, a collecting frame, magnetic guide sleeves and a balance ring; the planetary gear set comprises a gear ring, planetary gears, a sun gear and a connecting plate; one end of each stirring shaft is connected to a central rotating shaft of one planetary gear; the collecting frame is connected to a central rotating shaft of the sun gear; the magnetic guide sleeve is spirally fitted over the outer side of each stirring shaft. According to the present invention, by adopting the stirring and separating mechanism, the stirring shaft can revolve and rotate, and the battery sintering paste is fully stirred, so that magnetic foreign matters doped in the battery sintering paste can be adsorbed on the inner walls of the magnetic guide sleeves and move into the collecting frame along the inner walls, and quick separation of the magnetic foreign matters in the battery sintering paste is realized.

Description

A magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry Technical Field

[0001] The present invention relates to the technical field of battery slurry foreign matter separation, in particular to a magnetic foreign matter separation mechanism for lithium ion battery sintering slurry. Background Art

[0002] Stirring the cell slurry of lithium-ion batteries is one of the more important steps in the entire production process of lithium-ion batteries. The mixing degree of the battery slurry and the efficiency of removing magnetic foreign matter have a great impact on the product quality of lithium-ion batteries.

[0003] The electrode slurry of lithium-ion batteries includes positive electrode slurry and negative electrode slurry. During the preparation process of the positive and negative electrode slurries, the quality of the final lithium-ion battery is often affected by the presence of magnetic foreign matter in the mixed slurry. Therefore, the existing technology often uses multiple cycles of permanent magnetic adsorption and multiple filtration to separate magnetic foreign matter in the battery slurry. However, this method has the problems of long adsorption time and low adsorption efficiency. Therefore, there is an urgent need for a mechanism that can shorten the separation rate and improve the efficiency of magnetic foreign matter separation to solve the above problems.

[0004] Summary of the Invention

[0005] The object of the present invention is to provide a magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the solution of the present invention is: a magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry, comprising a separation body; the separation body comprises a detachably connected upper cover and a separation cylinder; the separation cylinder is tilted and fixed by a bracket, and the bottom end of the separation cylinder is provided with a discharge port; the top end of the upper cover is provided with a driving motor; a stirring and separation mechanism is provided in the inner cavity of the separation cylinder; the output shaft of the driving motor extends to the inner cavity of the upper cover and is connected to the stirring and separation mechanism; the stirring and separation mechanism comprises a planetary gear set, a stirring shaft, a collecting frame, a magnetic guide sleeve and a balance ring; the planetary gear set comprises a ring gear, a planetary gear, a sun gear and a connecting plate; the ring gear is fixed to the inner wall of the upper cover on one side close to the separation cylinder; the sun gear is located at the center point of the ring gear, and the central rotating shaft of the sun gear is connected to the output shaft of the driving motor through a coupling; the planetary gears are equidistantly arranged between the sun gear and the ring gear, and the planetary gears are all meshed with the sun gear and the ring gear. The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket.

[0007] Furthermore, the separation cylinder is provided with an observation window for observing the inner cavity of the separation cylinder.

[0008] Furthermore, the number of the planetary gears is not less than 3; the number of holes on the connecting plate, the number of stirring shafts and the number of magnetic guide sleeves are all equal to the number of the planetary gears.

[0009] Furthermore, the size of the planetary gear is greater than or equal to the size of the sun gear.

[0010] Furthermore, each of the outer side walls of the stirring shaft includes at least three groups of stirring blades, and the number of blades in each group of stirring blades is not less than two.

[0011] Furthermore, the surfaces of the stirring blades are provided with rubber sleeves.

[0012] Furthermore, the collection frame includes an upper plate and a lower tube that are detachably connected; a connecting column is fixed at the center of the opening of the lower tube through a support rod, and the connecting column extends upward along the setting direction of the lower tube; the top of the connecting column is threadedly connected to the upper plate, so that an annular opening is formed between the bottom of the upper plate and the opening of the lower tube.

[0013] Furthermore, a threaded groove movably connected to the central rotating shaft of the sun gear is provided at the top end of the upper plate.

[0014] Furthermore, an electromagnet sheet is provided on the inner wall of the magnetic guide sleeve so that magnetic force can be generated on the inner wall when the magnetic guide sleeve is energized.

[0015] Furthermore, balls are provided at equal intervals on the outer side wall of the balance ring; when the other end of the stirring shaft contacts the balance ring, it is always in contact with the balls.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] (1) The present invention adopts a stirring and separating mechanism with a special structure, so that when the driving motor drives the planetary gear set to operate, it can drive the stirring shaft to revolve and rotate, fully stirring the battery sintering slurry inside the separation cylinder, and continuously pushing the battery sintering slurry toward the magnetic guide sleeve through the stirring blades on the stirring shaft, so that the magnetic foreign matter mixed in the battery sintering slurry is magnetically adsorbed on the inner wall of the magnetic guide sleeve, and as the stirring shaft continuously rotates, the stirring blades rub against the inner wall of the magnetic guide sleeve, pushing the adsorbed magnetic foreign matter to move upward along the inner wall of the magnetic guide sleeve, and finally entering the collection frame for centralized collection, effectively realizing the rapid separation of magnetic foreign matter from other substances in the battery sintering slurry, shortening the separation time of magnetic foreign matter, and improving the separation rate of magnetic foreign matter;

[0018] (2) The present invention adopts a planetary gear set composed of a ring gear, a planetary gear, a sun gear, and a connecting plate, so that the stirring shaft can also rotate on its own while rotating around the ring gear under the influence of the planetary gear, thereby increasing the stirring effect of the stirring shaft on the battery sintering slurry, ensuring that the magnetic foreign matter in the battery sintering slurry can fully contact with the magnetic guide sleeve, thereby ensuring the separation rate of the magnetic foreign matter and shortening the separation time;

[0019] (3) The present invention adopts a magnetic guide sleeve of a special shape and arranges the magnetic guide sleeve on the outside of the stirring shaft so that when the stirring shaft rotates, the stirring blades will continuously rub against the inner wall of the magnetic guide sleeve, thereby pushing the magnetic foreign matter adsorbed on the inner wall of the magnetic guide sleeve to move continuously upward, so that the separated magnetic foreign matter can be directly pushed into the collection frame for centralized collection, and the remaining battery sintering slurry can be discharged through the discharge port, which is beneficial to the rapid separation of magnetic foreign matter and other substances in the lithium-ion battery sintering slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the front cross-section structure of the present invention;

[0021] FIG2 is a bottom view schematic diagram of the structure of the planetary gear set of the present invention;

[0022] FIG3 is a schematic cross-sectional view of the planetary gear set of the present invention;

[0023] FIG4 is a schematic diagram of a partial cross-sectional structure of a collection frame of the present invention;

[0024] FIG5 is a schematic diagram of the top view of the lower drum of the collecting frame of the present invention;

[0025] FIG6 is a front view schematic diagram of the structure of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] Driving motor 1, upper cover 2, separation cylinder 3, observation window 31, discharge port 32, bracket 4, stirring and separation mechanism 5, planetary gear set 51, ring gear 511, planetary gear 512, sun gear 513, connecting plate 514, connecting rod 515, stirring shaft 52, collecting frame 53, upper plate 531, annular opening 532, connecting column 533, lower cylinder 534, support rod 535, magnetic guide sleeve 54, balance ring 55. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0029] Example 1:

[0030] As shown in Figures 1-6, a magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry includes a separation body; the separation body includes a detachably connected upper cover 2 and a separation cylinder 3; the separation cylinder 3 is tilted and fixed by a bracket 4, and a discharge port 32 is provided at the bottom end of the separation cylinder 3; a driving motor 1 is provided at the top of the upper cover 2; a stirring and separating mechanism 5 is provided in the inner cavity of the separation cylinder 3; the output shaft of the driving motor 1 extends to the inner cavity of the upper cover 2 and is connected to the stirring and separating mechanism 5; the stirring and separating mechanism 5 includes a planetary gear set 51, a stirring shaft 52, a collecting frame 53, a magnetic guide sleeve 54 and a balance ring 55; the planetary gear set 51 includes a ring gear 511, a planetary gear 512, sun gear 513 and connecting plate 514; the ring gear 511 is fixed to the inner wall of the upper cover 2 near the separation cylinder 3; the sun gear 513 is located at the center point of the ring gear 511, and the central rotating shaft of the sun gear 513 is connected to the output shaft of the drive motor 1 through a coupling; the planetary gears 512 are arranged at equal intervals between the sun gear 513 and the ring gear 511, and the planetary gears 512 are meshed with the sun gear 513 and the ring gear 511; the connecting plate 514 is rotatably arranged on the outside of the central rotating shaft above the sun gear 513, and the connecting plate 514 is provided with holes for the central rotating shaft of the planetary gear 512 to pass through, and the bottom of the connecting plate 514 between two adjacent holes The outer wall of the stirring shaft 52 is provided with a plurality of stirring blades at equal intervals; the collecting frame 53 is located directly below the sun gear 513 and is detachably connected to the bottom of the central rotating shaft of the sun gear 513, and the collecting frame 53 is parallel to the stirring shaft 52, and an annular opening 532 is provided on the outer wall of the collecting frame 53; the magnetic guide sleeve 54 is spirally sleeved on the outside of the stirring shaft 52, and the magnetic guide sleeve 54 is spirally sleeved on the outside of the stirring shaft 52. The upper end of the outer wall of the sleeve 54 is fixedly connected to the bottom of the adjacent connecting rod 515, and the top end of the magnetic guide sleeve 54 extends to the inside of the annular opening 532; the multiple sets of stirring blades on the stirring shaft 52 are in contact with the inner wall of the magnetic guide sleeve 54 outside the stirring shaft 52; in this embodiment, the number of the planetary gears 512 is not less than 3; the number of holes in the connecting plate 514, the number of stirring shafts 52, and the number of magnetic guide sleeves 54 are equal to the number of planetary gears 512; in this embodiment, an electromagnet is provided on the inner wall of the magnetic guide sleeve 54, so that the magnetic guide sleeve 54 can generate magnetic force on the inner wall when it is energized; the number of planetary gears 512 is preferably 4;When the battery sintering slurry is injected into the separation cylinder 3 and the upper cover 2 is assembled with the separation cylinder 3, the stirring and separating mechanism 5 can be driven to move by the rotation of the driving motor 1. The output shaft of the rotating driving motor 1 will drive the sun gear 513 in the planetary gear set 51 to rotate, and the collection frame 53 will be driven to rotate through the sun gear 513. At the same time, the meshing planetary gear 512 rotates circumferentially along the inner wall of the ring gear 511. Therefore, the stirring shaft 52 will be affected by the planetary gear 512 to revolve around the sun gear 513 (that is, it rotates circumferentially around the ring gear 511 with the central axis of the inner cavity of the separation cylinder 3 as the center line). ) and rotates, constantly stirring the battery sintering slurry inside the separation cylinder 3; at this time, the planetary gear 512 revolving around the sun gear 513 will push the connecting plate 514 to rotate, and the connecting rod 515 fixed at the bottom of the connecting plate 514 will push the magnetic guide sleeve 54 to revolve synchronously with the stirring shaft 52 around the sun gear 513 (the magnetic guide sleeve 54 only revolves around the sun gear 513 and does not rotate), so when the magnetic guide sleeve 54 is energized, a magnetic attraction force will be generated at the inner wall of the magnetic guide sleeve 54. Therefore, the multiple sets of stirring blades on the continuously rotating stirring shaft 52, The battery sintering slurry will be continuously pushed toward the magnetic guide sleeve 54, so that the magnetic foreign matter mixed in the battery sintering slurry is attracted to the inner wall of the spiral magnetic guide sleeve 54 by the magnetic force. At the same time, as the stirring shaft 52 rotates continuously, the stirring blades will continuously rub against the inner wall of the magnetic guide sleeve 54, pushing the magnetic foreign matter attracted to the inner wall of the magnetic guide sleeve 54 to move upward, and finally the magnetic foreign matter is pushed into the annular opening 532 of the collection frame 53, and falls into the collection frame 53 through the annular opening 532 for centralized collection, so as to realize the magnetic attraction of the battery sintering slurry. The separation of foreign matter from other substances ensures that the separated battery sintering slurry can be discharged directly through the discharge port 32, which is beneficial to the rapid separation of magnetic foreign matter in the lithium-ion battery sintering slurry, effectively shortens the separation time of magnetic foreign matter, and improves the separation rate of magnetic foreign matter; the detachable upper cover 2 and separation cylinder 3 as well as the central rotating shaft of the sun gear 513 and the collection frame 53 are more conducive to the disassembly of the collection frame 53 inside the separation body, so that the collection frame 53 can be easily disassembled after the operation is completed, which is beneficial to the centralized processing of the magnetic foreign matter separated in the collection frame 53;

[0031] As shown in FIG2 , in this embodiment, the size of the planetary gear 512 is equal to the size of the sun gear 513 ; wherein, the gear ratio of the planetary gear 512 to the sun gear 513 determines the revolution and rotation speed of the planetary gear 512 . When the sizes of the two are equal, it can ensure that the stirring shaft 52 has a sufficient stirring speed, ensuring that the magnetic foreign matter in the lithium-ion battery sintering slurry can have a good separation rate during stirring; and when the size of the planetary gear 512 is equal to the size of the sun gear 513, the stirring speed of the stirring shaft 52 and the precipitation rate of the magnetic foreign matter are accelerated. Therefore, in actual use, the planetary gear 512 and the sun gear 513 with a suitable size ratio can be selected according to the use requirements.

[0032] As shown in Figure 1, in this embodiment, the outer wall of each stirring shaft 52 includes at least three groups of stirring blades, and the number of blades in each group of stirring blades is not less than two; in this embodiment, the surface of the stirring blades is provided with a rubber sleeve (not shown in the figure); wherein, the stirring blades on the outer wall of each stirring shaft 52 are preferably 4 groups, and the number of blades in each group of stirring blades is preferably 3, ensuring that the stirring shaft 52 has sufficient stirring force during the rotation process, thereby ensuring sufficient stirring of the lithium-ion battery sintering slurry; and the rubber sleeve can serve as a protective member to protect the stirring blades, reduce the friction between the stirring blades and the inner wall of the magnetic guide sleeve 54, reduce the wear of the stirring blades, and improve the sealing between the stirring blades and the inner wall of the magnetic guide sleeve 54, ensuring that the magnetic foreign matter adsorbed on the inner wall of the magnetic guide sleeve 54 can be fully pushed into the collection frame 53 for centralized collection;

[0033] As shown in FIG4 , in this embodiment, the collecting frame 53 includes a detachably connected upper plate 531 and a lower cylinder 534; a connecting column 533 is fixed to the center of the opening of the lower cylinder 534 through a support rod 535, and the connecting column 533 extends upward along the setting direction of the lower cylinder 534; the top of the connecting column 533 is threadedly connected to the upper plate 531, so that an annular opening 532 is formed between the bottom of the upper plate 531 and the opening of the lower cylinder 534; in this embodiment, the top of the upper plate 531 is provided with a threaded groove movably connected to the central rotating shaft of the sun gear 513, wherein,

[0034] As shown in FIG1 , in this embodiment, balls are provided at equal intervals on the outer wall of the balance ring 55 ; when the other end of the stirring shaft 52 contacts the balance ring 55 , it is always in contact with the balls; the balance ring 55 provided with balls can not only ensure that the bottom of the stirring shaft 52 has a certain degree of support during rotation, but also increase the sliding effect of the stirring shaft 52 during rotation through the balls, ensuring that the stirring shaft 52 can perform stable revolution and rotation, thereby achieving sufficient stirring of the lithium-ion battery sintering slurry;

[0035] As shown in FIG6 , in this embodiment, the separation cylinder 3 is provided with an observation window 31 for observing the inner cavity of the separation cylinder 3 ; wherein, the observation window 31 can facilitate the operator to observe the stirring of the lithium-ion battery sintering slurry and the separation of magnetic foreign matter inside the separation cylinder 3 , which is beneficial for the operator to control the operation process of the entire device;

[0036] In summary, the magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry provided by the present invention adopts a stirring and separation mechanism 5 with a special structure, so that when the driving motor 1 drives the planetary gear set 51 to operate, it can drive the stirring shaft 52 to revolve and rotate, fully stirring the battery sintering slurry inside the separation cylinder 3, and through the stirring blades on the stirring shaft 52, continuously pushing the battery sintering slurry to the magnetic guide sleeve 54, so that the magnetic foreign matter doped in the battery sintering slurry is magnetically adsorbed on the inner wall of the magnetic guide sleeve 54, and as the stirring shaft 52 continues to rotate, the stirring blades and the inner wall of the magnetic guide sleeve 54 rub against each other, pushing the adsorbed magnetic foreign matter to move upward along the inner wall of the magnetic guide sleeve 54, and finally entering the collection frame 53 for centralized collection, effectively realizing the rapid separation of magnetic foreign matter and other substances in the battery sintering slurry, shortening the separation time of magnetic foreign matter, and improving the separation rate of magnetic foreign matter.

[0037] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0038] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry, comprising a separation body; the separation body comprises a detachably connected upper cover (2) and a separation cylinder (3); the separation cylinder (3) is tilted and fixed by a bracket (4), and a discharge port (32) is provided at the bottom end of the separation cylinder (3); and the characteristics are: A driving motor (1) is provided at the top of the upper cover (2); a stirring and separating mechanism (5) is provided in the inner cavity of the separation cylinder (3); the output shaft of the driving motor (1) extends into the inner cavity of the upper cover (2) and is connected to the stirring and separating mechanism (5); the stirring and separating mechanism (5) comprises a planetary gear set (51), a stirring shaft (52), a collecting frame (53), a magnetic guide sleeve (54) and a balance ring (55); the planetary gear set (51) comprises a ring gear (511), planetary gears (512), a sun gear (513) and a connecting plate (514) The ring gear (511) is fixed to the inner wall of the upper cover (2) on the side close to the separation cylinder (3); the sun gear (513) is located at the center point of the ring gear (511), and the central rotation axis of the sun gear (513) is connected to the output shaft of the drive motor (1) through a coupling; the planetary gears (512) are arranged at equal intervals between the sun gear (513) and the ring gear (511), and the planetary gears (512) are meshed with the sun gear (513) and the ring gear (511); the connecting plate (514) is rotatably arranged above the sun gear (513) The connecting plate (514) is provided with a hole for the central rotating shaft of the planetary gear (512) to pass through, and a connecting rod (515) is provided at the bottom of the connecting plate (514) between two adjacent holes; the balancing ring (55) is fixed above the discharge port (32) at the bottom of the inner cavity of the separation cylinder (3); one end of the stirring shaft (52) is connected to the bottom of the central rotating shaft of the planetary gear (512) through a coupling, and the other end of the stirring shaft (52) contacts the outer wall of the balancing ring (55), and the outer wall of the stirring shaft (52) is provided with equal intervals. Multiple groups of stirring blades; the collecting frame (53) is located directly below the sun gear (513) and is detachably connected to the bottom of the central rotating shaft of the sun gear (513), and the collecting frame (53) is parallel to the stirring shaft (52), and an annular opening (532) is provided on the outer wall of the collecting frame (53); the magnetic guide sleeve (54) is spirally sleeved on the outer side of the stirring shaft (52), and the upper end of the outer wall of the magnetic guide sleeve (54) is fixedly connected to the bottom of the adjacent connecting rod (515), and the top end of the magnetic guide sleeve (54) extends to the inner side of the annular opening (532); the multiple groups of stirring blades on the stirring shaft (52) are all in contact with the inner wall of the magnetic guide sleeve (54) on the outer side of the stirring shaft (52).

2. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 1, characterized in that: The separation cylinder (3) is provided with an observation window (31) for observing the inner cavity of the separation cylinder (3).

3. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 1, characterized in that: The number of the planetary gears (512) is no less than 3; the number of holes on the connecting plate (514), the number of the stirring shafts (52), and the number of the magnetic guide sleeves (54) are all equal to the number of the planetary gears (512).

4. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 3, characterized in that: The size of the planetary gear (512) is greater than or equal to the size of the sun gear (513).

5. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 3, characterized in that: The outer side wall of each stirring shaft (52) comprises at least three groups of stirring blades, and the number of blades in each group of stirring blades is not less than two.

6. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 5, characterized in that: The surfaces of the stirring blades are all provided with rubber sleeves.

7. A magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to any one of claims 1 to 6, characterized in that: The collecting frame (53) comprises a detachably connected upper plate (531) and a lower cylinder (534); a connecting column (533) is fixed at the center of the opening of the lower cylinder (534) via a support rod (535), and the connecting column (533) extends upward along the setting direction of the lower cylinder (534); the top end of the connecting column (533) is threadedly connected to the upper plate (531), so that an annular opening (532) is formed between the bottom of the upper plate (531) and the opening of the lower cylinder (534).

8. The magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to claim 7, characterized in that: The top end of the upper plate (531) is provided with a threaded groove movably connected to the central rotating shaft of the sun gear (513).

9. A magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to any one of claims 1 to 6, characterized in that: An electromagnet sheet is provided on the inner wall of the magnetic guide sleeve (54), so that a magnetic force can be generated on the inner wall of the magnetic guide sleeve (54) when electricity is supplied.

10. A magnetic foreign matter separation mechanism for lithium-ion battery sintering slurry according to any one of claims 1 to 6, characterized in that: Ball bearings are provided at equal intervals on the outer wall of the balance ring (55); when the other end of the stirring shaft (52) contacts the balance ring (55), it is always in contact with the ball bearings.