Lithium battery slurry mixing equipment with circulating structure

Abstract

The utility model relates to the technical field of lithium battery processing, in particular to lithium battery slurry mixing equipment with a circulating structure, which comprises a mixing tank, a mixing component for mixing slurry is mounted on the mixing tank, and a circulating component for filtering and circulating the slurry is mounted at the bottom of the mixing tank; the circulating assembly comprises a filter box fixed at the bottom of the mixing tank, a filter screen is fixed in the filter box, a cleaning shaft is rotatably mounted at the top of the filter screen, a cleaning brush attached to the filter screen is fixed to one side of the cleaning shaft, and a circulating pipe is fixedly connected to the bottom of the filter box. And a pump body is fixed in the middle of the circulating pipe. After being filtered by the filter screen, the slurry at the bottom enters the filter box and is re-fed into the mixing tank from the tail end of the circulating pipe to realize circulating feeding of the lithium battery slurry, and the slurry is cleaned by the rotating cleaning brush and the filter screen, so that the slurry is prevented from blocking the filter screen and influencing the normal use of the circulating assembly.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery processing technology, and in particular to a lithium battery slurry mixing device with a circulation structure. Background Technology

[0002] Lithium-ion battery slurry is a key material in the manufacturing of lithium-ion batteries. It is mainly composed of active materials, conductive agents, binders and solvents. In order to make the active material particles uniformly dispersed in the slurry, the lithium-ion battery slurry is stirred by mixing equipment during the processing. Stirring not only makes the active material particles uniformly dispersed in the slurry, but also makes the binder uniformly cover the surface of the active material and conductive agent, ensuring the structural stability of the electrode.

[0003] The lithium battery slurry mixing equipment uses a drive shaft to drive the stirring blades to stir the slurry. Particles may accumulate at the bottom, making it difficult to stir the particles at the bottom.

[0004] The existing publicly available technical solution, CN220715672U, discloses a device for preparing lithium battery slurry, including a shell, a circulation device and an auxiliary stirring device. The auxiliary stirring device is fixed on the bottom surface of the shell, and the circulation device is fixed on the auxiliary stirring device. The circulation device is fixedly connected to the shell. Through the circulation device, the bottom slurry can be recirculated into the shell to achieve uniform mixing.

[0005] In actual implementation, the above technical solution recirculates the bottom slurry back into the outer shell through a circulation device. However, the circulation structure is simple and cannot filter the slurry. Large, undispersed particles, precipitates, etc., will directly enter the circulation device, affecting its normal operation. Summary of the Invention

[0006] The purpose of this invention is to provide a lithium battery slurry mixing device with a circulation structure. The slurry at the bottom is filtered through a filter screen and then enters the filter box. It is then reintroduced into the mixing tank from the end of the circulation pipe to achieve the circulation of lithium battery slurry. Furthermore, the filter screen is cleaned by a rotating cleaning brush to prevent slurry from clogging the filter screen and affecting the normal use of the circulation components, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery slurry mixing device with a circulation structure, comprising a mixing tank, a mixing component for mixing the slurry installed on the top of the mixing tank, a circulation component for filtering the circulating slurry installed at the bottom of the mixing tank, and a reversing component for assisting in mixing the slurry provided on the outside of the mixing component.

[0008] The circulation assembly includes a filter box fixed to the bottom of the mixing tank, a filter screen fixed inside the filter box, a cleaning shaft rotatably mounted on the top of the filter screen, a cleaning brush that fits against the filter screen fixed on one side of the cleaning shaft, a circulation pipe fixedly connected to the bottom of the filter box, and a pump body fixed in the middle of the circulation pipe.

[0009] Preferably, the mixing assembly includes a transmission box fixed to the top of the mixing tank, and a mixing motor is fixedly installed on one side of the transmission box, with a drive bevel gear fixed to the power output end of the mixing motor.

[0010] Preferably, a first driven bevel gear is meshed with one side of the driving bevel gear, and a second driven bevel gear that meshes with the driving bevel gear is arranged parallel to the bottom of the first driven bevel gear.

[0011] Preferably, a mixing shaft is fixed to the middle of the first driven bevel gear, and a reversing cylinder is fixed to the middle of the second driven bevel gear, with the mixing shaft passing through the interior of the reversing cylinder.

[0012] Preferably, the reversing assembly includes a reversing cylinder, with support frames fixed on the left and right sides of the reversing cylinder, and scrapers fixed on the surface of the support frames near the inner wall of the mixing tank.

[0013] Preferably, a plurality of equidistant and uniformly distributed side mixing rods are fixed on the other side surface of the support frame.

[0014] Preferably, the mixing assembly further includes a central mixing rod fixed to the surface of the mixing shaft, the central mixing rod being fixedly connected to the cleaning shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Through the set circulation component, the bottom slurry is filtered through the filter screen and then enters the filter box. It is then reintroduced into the mixing tank from the end of the circulation pipe to realize the circulation of lithium battery slurry. The rotating cleaning brush cleans the filter screen to prevent the slurry from clogging the filter screen and affecting the normal use of the circulation component.

[0017] 2. The active bevel gear drives the first driven bevel gear and the second driven bevel gear to rotate, while the mixing shaft and the reverse cylinder rotate in opposite directions. Thus, the side mixing rod and the middle mixing rod cooperate with each other to achieve uniform mixing of the slurry. The mixing shaft can also drive the cleaning shaft to rotate. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a bottom view of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of a half-section of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the active bevel gear of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Mixing tank; 2. Mixing assembly; 201. Mixing motor; 202. Transmission box; 203. Driving bevel gear; 204. First driven bevel gear; 205. Mixing shaft; 206. Second driven bevel gear; 207. Central mixing rod; 3. Circulation assembly; 301. Pump body; 302. Circulation pipe; 303. Filter box; 304. Cleaning shaft; 305. Filter screen; 306. Cleaning brush; 4. Reversing assembly; 401. Reversing cylinder; 402. Support frame; 403. Side mixing rod; 404. Scraper. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 4 A lithium battery slurry mixing device with a circulation structure includes a mixing tank 1, a mixing component 2 for mixing slurry is installed on the top of the mixing tank 1, a circulation component 3 for filtering the circulating slurry is installed at the bottom of the mixing tank 1, and a reversing component 4 for assisting in mixing slurry is provided on the outside of the mixing component 2.

[0028] The circulation assembly 3 includes a filter box 303 fixed to the bottom of the mixing tank 1. A filter screen 305 is fixed inside the filter box 303, and a cleaning shaft 304 is rotatably mounted on the top of the filter screen 305. A cleaning brush 306 that is in contact with the filter screen 305 is fixed on one side of the cleaning shaft 304. The bristles at the bottom of the cleaning brush 306 are in contact with the filter screen 305. A circulation pipe 302 is fixedly connected to the bottom of the filter box 303, and a pump body 301 is fixed in the middle of the circulation pipe 302.

[0029] By adopting the above technical solution, during the mixing process of the lithium battery slurry inside the mixing tank 1, the pump body 301 can be started simultaneously. The pump body 301 transports the slurry at the bottom from the filter box 303 to the circulation pipe 302. During the pumping process, the slurry at the bottom is filtered through the filter screen 305. The filtered slurry can enter the filter box 303 and be reintroduced into the mixing tank 1 from the end of the circulation pipe 302, realizing the cyclic feeding of lithium battery slurry. When the cleaning shaft 304 rotates, it can drive the cleaning brush 306 to rotate. The bottom is equipped with soft bristles that fit against the filter screen 305. The rotating cleaning brush 306 cleans the filter screen 305, preventing slurry from clogging it. Through the circulation component 3, the slurry at the bottom, after being filtered by the filter screen 305, enters the filter box 303 and is then reintroduced into the mixing tank 1 through the end of the circulation pipe 302, thus realizing the circulation of lithium battery slurry. The rotating cleaning brush 306 cleans the filter screen 305, preventing slurry from clogging it and affecting the normal use of the circulation component 3.

[0030] Specifically, such as Figure 4 As shown, the mixing assembly 2 includes a transmission box 202 fixed to the top of the mixing tank 1, and a mixing motor 201 is fixedly installed on one side of the transmission box 202. A driving bevel gear 203 is fixed to the power output end of the mixing motor 201. A first driven bevel gear 204 is meshed on one side of the driving bevel gear 203. A second driven bevel gear 206 that meshes with the driving bevel gear 203 is arranged parallel to the bottom of the first driven bevel gear 204. A mixing shaft 205 is fixed in the middle of the first driven bevel gear 204. A reversing cylinder 401 is fixed in the middle of the second driven bevel gear 206. The mixing shaft 205 passes through the interior of the reversing cylinder 401.

[0031] The reversing assembly 4 includes a reversing cylinder 401, with support frames 402 fixed on the left and right sides of the reversing cylinder 401. A scraper 404 is fixed on the surface of the support frame 402 near the inner wall of the mixing tank 1. Multiple side mixing rods 403 are fixed on the other side surface of the support frame 402. The mixing assembly 2 also includes a central mixing rod 207 fixed to the surface of the mixing shaft 205. The central mixing rod 207 is fixedly connected to the cleaning shaft 304.

[0032] By adopting the above technical solution, the mixing tank 1 is also equipped with a feed pipe and a discharge valve. The feed pipe is located at the top of the mixing tank 1, and the discharge valve is located on one side of the bottom of the mixing tank 1. Both the discharge valve and the feed pipe are existing equipment and will not be described in detail here. After the slurry enters the mixing tank 1 and the mixing motor 201 starts, the power output end of the mixing motor 201 drives the driving bevel gear 203 to rotate. The driving bevel gear 203 can drive the first driven bevel gear 204 and the second driven bevel gear 206 to rotate through its teeth. The first driven bevel gear 204 and the second driven bevel gear 206 respectively drive the mixing shaft 205 and the reversing cylinder 401 to rotate in opposite directions. The mixing shaft 205 can drive the middle mixing... When the mixing rod 207 rotates, the reversing cylinder 401 can drive the side mixing rod 403 and scraper 404 to rotate via the support frame 402. The scraper 404 can scrape off the particles adhering to the inner wall of the mixing tank 1, while the side mixing rod 403 can cooperate with the middle mixing rod 207 to uniformly mix the slurry. Through the set mixing component 2, the first driven bevel gear 204 and the second driven bevel gear 206 are driven to rotate by the active bevel gear 203, while the mixing shaft 205 and the reversing cylinder 401 rotate in opposite directions. Thus, the side mixing rod 403 and the middle mixing rod 207 cooperate to achieve uniform mixing of the slurry, and the mixing shaft 205 can drive the cleaning shaft 304 to rotate.

[0033] Working principle: After the mixing motor 201 starts, its power output drives the driving bevel gear 203 to rotate. The driving bevel gear 203, through its teeth, drives the first driven bevel gear 204 and the second driven bevel gear 206 to rotate. The first driven bevel gear 204 and the second driven bevel gear 206 respectively drive the mixing shaft 205 and the reversing cylinder 401 to rotate in opposite directions. The mixing shaft 205 drives the central mixing rod 207 to rotate. The reversing cylinder 401, through the support frame 402, drives the side mixing rod 403 and the scraper 404 to rotate. The scraper 404 scrapes off the particles adhering to the inner wall of the mixing tank 1, while the side mixing rod 403 cooperates with the central mixing rod 207 to... The slurry is uniformly mixed. During the mixing process, the pump body 301 can be started simultaneously. The pump body 301 transports the slurry at the bottom from the filter box 303 to the circulation pipe 302. During the pumping process, the slurry at the bottom is filtered through the filter screen 305. The filtered slurry can enter the filter box 303 and be reintroduced into the mixing tank 1 from the end of the circulation pipe 302, realizing the circulation and feeding of lithium battery slurry. When the cleaning shaft 304 rotates, it can drive the cleaning brush 306 to rotate. The bottom of the cleaning brush 306 is equipped with soft bristles that fit against the filter screen 305. The rotating cleaning brush 306 cleans the filter screen 305, thereby preventing the slurry from clogging the filter screen 305.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery slurry mixing device with a circulation structure, comprising a mixing tank (1), characterized in that: The mixing tank (1) is equipped with a mixing component (2) for mixing slurry, and a circulation component (3) for filtering circulating slurry is installed at the bottom of the mixing tank (1). A reversing component (4) for assisting in mixing slurry is provided on the outside of the mixing component (2). The circulation assembly (3) includes a filter box (303) fixed to the bottom of the mixing tank (1). A filter screen (305) is fixed inside the filter box (303), and a cleaning shaft (304) is rotatably mounted on the top of the filter screen (305). A cleaning brush (306) that fits against the filter screen (305) is fixed on one side of the cleaning shaft (304). A circulation pipe (302) is fixedly connected to the bottom of the filter box (303), and a pump body (301) is fixed in the middle of the circulation pipe (302).

2. The lithium battery slurry mixing device with a circulation structure according to claim 1, characterized in that: The mixing component (2) includes a transmission box (202) fixed on the top of the mixing tank (1), and a mixing motor (201) is fixedly installed on one side of the transmission box (202). The power output end of the mixing motor (201) is fixed with an active bevel gear (203).

3. A lithium battery slurry mixing device with a circulation structure according to claim 2, characterized in that: The first driven bevel gear (204) is meshed with one side of the driving bevel gear (203), and a second driven bevel gear (206) that meshes with the driving bevel gear (203) is arranged parallel below the first driven bevel gear (204).

4. A lithium battery slurry mixing device with a circulation structure according to claim 3, characterized in that: A mixing shaft (205) is fixed in the middle of the first driven bevel gear (204), and a reversing cylinder (401) is fixed in the middle of the second driven bevel gear (206). The mixing shaft (205) passes through the interior of the reversing cylinder (401).

5. A lithium battery slurry mixing device with a circulation structure according to claim 4, characterized in that: The reversing assembly (4) includes a reversing cylinder (401), and support frames (402) are fixed on the left and right sides of the reversing cylinder (401). A scraper (404) is fixed on the surface of the support frame (402) near the inner wall of the mixing tank (1).

6. A lithium battery slurry mixing device with a circulation structure according to claim 5, characterized in that: A plurality of equidistant and evenly distributed side mixing rods (403) are fixed on the other side surface of the support frame (402).

7. A lithium battery slurry mixing device with a circulation structure according to claim 6, characterized in that: The mixing assembly (2) also includes a central mixing rod (207) fixed to the surface of the mixing shaft (205), the central mixing rod (207) being fixedly connected to the cleaning shaft (304).

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