A mixing device and a mixing method for lithium battery negative electrode material

Abstract

The application discloses a mixing device and a mixing method for lithium battery negative materials, and relates to the technical field of lithium battery materials.The application comprises a mixing barrel, a feeding assembly and a stirring assembly;when stirring, one feeding lifting plate is moved so that the corresponding feeding port is opened, part of lithium battery negative materials is guided into the mixing barrel, then the feeding lifting plate is moved back to the original position, the corresponding feeding port is closed, another feeding lifting plate is moved so that the corresponding feeding port is opened, part of another kind of lithium battery negative materials is guided into the mixing barrel, then the feeding lifting plate is moved back to the original position, the corresponding feeding port is closed, and the two feeding lifting plates are reciprocally operated, so that the two kinds of lithium battery negative materials are staggered into the mixing barrel, the two kinds of lithium battery negative materials are staggered, the stirring of the two kinds of lithium battery negative materials is facilitated, the stirring effect is improved, the stirring time is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery material technology, and more specifically, relates to a mixing device and a mixing method for lithium battery anode materials. Background Technology

[0002] Electrode materials are an important component of lithium-ion batteries and are the core of lithium-ion batteries. The production of lithium battery anode materials requires the mixing of various raw materials, and the materials have certain particle size requirements, so they need to be mixed in mixing equipment.

[0003] In the coating and granulation process of lithium battery anode material production, the mixing process is an essential step. Besides mixing different materials, if the particle size distribution of a material in a certain step is not up to standard, it is added to a mixer in different proportions according to its particle size distribution for thorough mixing to achieve the required particle size distribution. Existing mixing equipment typically involves first adding one type of material with a specific particle size distribution into the mixing tank, and then adding another type of material with a different particle size distribution. The two materials are clearly distributed vertically within the mixing tank, requiring a significant amount of time to achieve the desired particle size distribution, resulting in low efficiency. Furthermore, during mixing, some material adheres to the inner wall of the mixing tank and does not participate in the mixing process, reducing mixing precision and affecting the mixing effect. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present invention is a mixing device and a mixing method for lithium battery anode materials, including a mixing tank, a feeding assembly and a stirring assembly, wherein a feeding hopper is provided on the top surface of the mixing tank;

[0005] The feeding assembly includes a storage box, a storage partition, a dispensing box, a dispensing rotating plate, and a feeding lifting plate. The storage box is disposed inside the mixing tank, the storage partition is fixedly installed inside the storage box, the storage box has a feeding port at the top, the dispensing box is disposed inside the feeding port, the dispensing rotating plate is disposed inside the dispensing box, the dispensing box has dispensing ports on both sides, the storage box 201 has two feeding ports on its side, and the feeding lifting plate is disposed at the feeding port.

[0006] The storage partition divides the inside of the storage box into two compartments, with two dispensing ports corresponding to the two compartments respectively. The dispensing rotating plate can rotate from a horizontal state to an inclined state, so that one dispensing port on each side of the dispensing box is open and the other is closed. The feeding lifting plate can move vertically, which can open the feeding port.

[0007] The stirring assembly includes several stirring drive shafts, spiral stirring blades, staggered stirring blades, and several scraper blades; the staggered stirring blades are fixedly installed on the stirring drive shaft located in the middle position, the spiral stirring blades and the staggered stirring blades are respectively fixedly installed on the corresponding stirring drive shafts on both sides, the scraper blades are staggered on the staggered stirring blades and are fixedly connected to the staggered stirring blades, and the scraper blades are in contact with the inner wall of the mixing tank.

[0008] Preferably, the mixing tank has a guide port on its top surface, the feeding hopper is fixedly installed at the guide port, the storage box is fixedly installed at the bottom of the feeding hopper, the feeding hopper is connected to the storage box, the distributing box is disposed in the storage box and is fixedly installed at the feeding port, and the distributing rotating plate is rotatably installed in the distributing box.

[0009] Preferably, the feeding assembly further includes a distributing unit, which is disposed on both sides of the distributing box. The distributing unit includes a lifting distributing plate, a distributing spring, a lifting guide rod, and a spring mounting block. The top surface of the storage box has two distributing mounting ports. The lifting distributing plate is slidably engaged with the distributing mounting ports. The spring mounting block is fixedly installed on the outer side of the feeding hopper. One end of the distributing spring is fixedly connected to the lifting distributing plate, and the other end is fixedly connected to the spring mounting block. One end of the lifting guide rod is fixedly installed on the top surface of the lifting distributing plate, and the other end slides through the spring mounting block.

[0010] Preferably, the feeding assembly further includes an upward moving rod, a downward moving rod, a rotating cam, a feeding gear, a feeding rack, a feeding electric push rod, an upward return spring, and a downward return spring. The upward moving rod is slidably mounted on the side of the storage box. The upward moving rod is fixedly connected to one feeding lifting plate, and the downward moving rod is fixedly connected to another feeding lifting plate. Spring fixing blocks are respectively provided above the upward moving rod and below the downward moving rod. The upward return spring is fixedly mounted on the top surface of the upward moving rod and is fixedly connected to the upper spring fixing block. The downward return spring 214 is fixedly mounted on the bottom surface of the downward moving rod and is fixedly connected to the lower spring fixing block. The rotating cam is located between the upward moving rod and the downward moving rod and is rotatably mounted on the side of the storage box. The feeding gear is fixedly mounted on the side of the rotating cam. The feeding electric push rod is fixedly mounted on the side of the storage box. The output end of the feeding electric push rod is fixedly connected to the feeding rack, and the feeding rack meshes with the feeding gear.

[0011] Preferably, the feeding assembly further includes a distributing rotating rod, a rotating gear ring, and a rotation damper. One end of the distributing rotating rod passes through the storage box and the distributing box and is fixedly connected to the distributing rotating plate. The other end passes through the mixing tank and extends out of the mixing tank. The rotation damper is fixedly sleeved on the distributing rotating rod and is fixedly connected to the mixing tank. The rotating gear ring is located inside the mixing tank and is fixedly sleeved on the distributing rotating rod.

[0012] Preferably, the feeding assembly further includes a limiting unit, which is disposed on both sides of the feeding rack. The limiting unit includes a lifting rack, a lifting linkage rod, a linkage rack, a rotating gear, a moving rack, a moving linkage rod, and a moving limiting block. The lifting rack is slidably mounted on the side of the storage box and meshes with the rotating gear ring. The lifting linkage rod is slidably mounted on the side of the storage box, with one end fixedly connected to the lifting rack and the other end fixedly connected to the linkage rack. Two gear mounting plates are fixedly mounted on the side of the storage box. The rotating gear is rotatably mounted on the side of the gear mounting plate and meshes with the rotating gear. The moving linkage rod is slidably mounted on the top surface of the storage box and is fixedly connected to the moving linkage rod and meshes with the rotating gear. The moving limiting block is disposed on the side of the feeding rack and is fixedly connected to the moving linkage rod.

[0013] Preferably, the stirring assembly further includes a plurality of stirring motors, which are fixedly installed on the top surface of the mixing tank, and the driving shafts of the stirring motors are respectively fixedly connected to the corresponding stirring driving shafts.

[0014] Preferably, a rotating pointer is fixedly installed on the material dispensing rotating rod, and the side of the rotating pointer is perpendicular to the top surface of the material dispensing rotating plate 204.

[0015] Preferably, the storage box is located above the stirring scraper rod, so as not to affect the rotation of the stirring scraper rod.

[0016] A method for mixing materials for lithium-ion batteries, using the aforementioned mixing equipment, includes the following steps;

[0017] Before stirring, the lithium battery negative electrode material is poured into the feeding hopper. The feeding hopper guides the lithium battery negative electrode material into the dispensing box. The dispensing rotating plate rotates from a horizontal state to an inclined state, so that one dispensing port on both sides of the dispensing box is in an open state and the other is in a closed state. The lithium battery negative electrode material is then introduced into the corresponding partition cavity. After the dispensing is completed, the dispensing rotating plate rotates to a horizontal state and another lithium battery negative electrode material is poured into the feeding hopper. The above operation is repeated to introduce another lithium battery negative electrode material into another partition cavity.

[0018] During mixing, one feed lifting plate moves, opening its corresponding feed port to introduce a portion of the lithium battery negative electrode material into the mixing tank. Then, the feed lifting plate 205 moves back to its original position, closing the corresponding feed port. The other feed lifting plate moves, opening its corresponding feed port to introduce a portion of another type of lithium battery negative electrode material into the mixing tank. This same feed lifting plate 205 then moves back to its original position, closing the corresponding feed port. The two feed lifting plates operate in a reciprocating manner, allowing the two types of lithium battery negative electrode materials to enter the mixing tank alternately, resulting in a staggered distribution that facilitates mixing during stirring. The stirring drive shaft rotates, driving the spiral stirring blades, staggered stirring blades, and other staggered stirring blades to stir the lithium battery negative electrode material in the mixing tank. During the rotation of the staggered stirring blades, the scraper contacts the inner wall of the mixing tank, preventing some lithium battery negative electrode material from adhering to the tank wall and not participating in the mixing.

[0019] Compared with the prior art, the present invention provides a mixing device and a mixing method for lithium battery anode materials, which has the following beneficial effects:

[0020] 1. During mixing, one feed lifting plate moves, opening its corresponding feed port to introduce a portion of the lithium battery negative electrode material into the mixing tank. Afterward, the feed lifting plate moves back to its original position, closing the corresponding feed port. The other feed lifting plate moves, opening its corresponding feed port to introduce a portion of another type of lithium battery negative electrode material into the mixing tank. Afterward, the feed lifting plate moves back to its original position, closing the corresponding feed port. The two feed lifting plates operate in a reciprocating manner, allowing the two types of lithium battery negative electrode materials to enter the mixing tank alternately. This ensures that the two types of lithium battery negative electrode materials are distributed alternately, making it easier to achieve the desired mixing distribution during mixing, improving the mixing effect, reducing mixing time, and increasing work efficiency.

[0021] 2. Before mixing, pour the lithium battery negative electrode material into the feed hopper. The feed hopper guides the lithium battery negative electrode material into the distribution box. The distribution rotating plate rotates from a horizontal position to an inclined position, so that one distribution port on each side of the distribution box is open and the other is closed, guiding the lithium battery negative electrode material into the corresponding partition cavity. After the distribution is completed, the distribution rotating plate rotates to a horizontal position, and another type of lithium battery negative electrode material is poured into the feed hopper. Repeat the operation to guide the other type of lithium battery negative electrode material into another partition cavity. The storage box stores the two types of lithium battery negative electrode materials to be mixed at the same time. When mixing is not required, different lithium battery negative electrode materials are added in batches to improve work efficiency.

[0022] 3. The rotation of the stirring drive shaft drives the spiral stirring blades, staggered stirring blades, and other staggered stirring blades to rotate, stirring the lithium battery negative electrode material in the mixing tank. During the rotation of the staggered stirring blades, the scraper contacts the inner wall of the mixing tank to prevent some lithium battery negative electrode material from adhering to the tank wall and not participating in the mixing, thus affecting the stirring accuracy. The use of multiple stirring parts makes the stirring more thorough and improves the stirring effect.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the overall three-dimensional structural schematic diagrams of the present invention;

[0026] Figure 2 This is the second schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 3 This is one of the partial three-dimensional structural schematic diagrams of the present invention;

[0028] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A

[0029] Figure 5 This is a second partial three-dimensional structural schematic diagram of the present invention;

[0030] Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point B;

[0031] Figure 7 This is the third partial three-dimensional structural schematic diagram of the present invention;

[0032] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at point C;

[0033] Figure 9 This is the fourth partial three-dimensional structural schematic diagram of the present invention.

[0034] Figure 10 For the present invention Figure 9 A schematic diagram of the structure at point D;

[0035] Figure 11This is the fifth partial three-dimensional structural schematic diagram of the present invention;

[0036] Figure 12 For the present invention Figure 11 A schematic diagram of the structure at point E.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Mixing tank; 101. Feed hopper; 2. Feeding assembly; 201. Storage box; 202. Storage partition; 203. Distributor box; 204. Distributor rotating plate; 205. Feed lifting plate; 206. Separating cavity; 207. Lifting rod; 208. Lowering rod; 209. Rotating cam; 210. Feeding gear; 211. Feeding rack; 212. Feeding electric push rod; 213. Lifting return spring; 214. Lowering return spring; 215. Distributor rotating rod; 216. Rotating gear ring; 217. Rotation damper; 21. Distributor unit 2101. Lifting and distributing plate; 2102. Distributing spring; 2103. Lifting guide rod; 2104. Spring mounting block; 22. Limiting unit; 2201. Lifting rack; 2202. Lifting linkage rod; 2203. Linkage rack; 2204. Rotating gear; 2205. Moving rack; 2206. Moving linkage rod; 2207. Moving limit block; 3. Mixing assembly; 301. Mixing drive shaft; 302. Spiral mixing blade; 303. Interlaced mixing blade; 304. Mixing scraper; 305. Scraper; 306. Mixing motor. Detailed Implementation

[0039] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0040] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0041] For examples, please refer to Figure 1 - Figure 12 This embodiment discloses a mixing device, including a mixing tank 1, a feeding assembly 2 and a stirring assembly 3, wherein a feeding hopper 101 is provided on the top surface of the mixing tank 1;

[0042] The feeding assembly 2 includes a storage box 201, a storage partition 202, a distributing box 203, a distributing rotating plate 204, and a feeding lifting plate 205. The storage box 201 is placed inside the mixing tank 1. The storage partition 202 is fixedly installed inside the storage box 201. The top of the storage box 201 has a feeding port. The distributing box 203 is placed inside the feeding port. The distributing rotating plate 204 is placed inside the distributing box 203. The distributing box 203 has distributing ports on both sides. The storage box 201 has two feeding ports on its side. The feeding lifting plate 205 is placed at the feeding port.

[0043] The storage partition 202 can divide the inside of the storage box 201 into two partition cavities 206, and the two dispensing ports correspond to the two partition cavities 206 respectively. The dispensing rotating plate 204 can rotate from a horizontal state to an inclined state, so that one dispensing port on both sides of the dispensing box 203 is in an open state and the other is in a closed state. The feeding lifting plate 205 can move vertically, which can open the feeding port.

[0044] The stirring assembly 3 includes several stirring drive shafts 301, spiral stirring blades 302, staggered stirring blades 303, stirring scraper 304, and several scraper blades 305. The stirring scraper 304 is fixedly installed on the stirring drive shaft 301 located in the middle position. The spiral stirring blades 302 and staggered stirring blades 303 are respectively fixedly installed on the stirring drive shafts 301 on both sides. The scraper blades 305 are staggered on the stirring scraper 304 and fixedly connected to the stirring scraper 304. The scraper blades 305 are in contact with the inner wall of the mixing tank 1.

[0045] Before mixing, the lithium battery negative electrode material is poured into the feed hopper 101. The feed hopper 101 guides the lithium battery negative electrode material into the distribution box 203. The distribution rotating plate 204 rotates from a horizontal state to an inclined state, so that one of the distribution ports on both sides of the distribution box 203 is open and the other is closed, guiding the lithium battery negative electrode material into the corresponding partition cavity 206. After the distribution is completed, the distribution rotating plate 204 rotates to a horizontal state, and another lithium battery negative electrode material is poured into the feed hopper 101. The operation is repeated to guide the other lithium battery negative electrode material into another partition cavity 206. The storage box 201 stores the two lithium battery negative electrode materials to be mixed at the same time. When mixing is not required, different lithium battery negative electrode materials are added in batches to improve work efficiency.

[0046] During mixing, one feed lifting plate 205 moves, opening its corresponding feed inlet to introduce a portion of the lithium battery negative electrode material into the mixing tank 1. Then, the feed lifting plate 205 moves back to its original position, closing the corresponding feed inlet. The other feed lifting plate 205 moves, opening its corresponding feed inlet to introduce a portion of another type of lithium battery negative electrode material into the mixing tank 1. Then, the feed lifting plate 205 moves back to its original position, closing the corresponding feed inlet. The two feed lifting plates 205 operate in a reciprocating manner, causing the two types of lithium battery negative electrode materials to alternately enter the mixing tank 1, resulting in an alternating distribution of the two materials. During stirring, it is easier to achieve the desired mixing distribution of the two lithium battery anode materials, improving the stirring effect, reducing stirring time, and increasing work efficiency. The rotation of the stirring drive shaft 301 drives the spiral stirring blade 302, the staggered stirring blade 303, and the stirring scraper 304 to rotate, stirring the lithium battery anode materials in the mixing tank 1. During the rotation of the stirring scraper 304, the scraper blade 305 contacts the inner wall of the mixing tank 1 to prevent some lithium battery anode materials from adhering to the tank wall and not participating in the mixing, thus affecting the stirring accuracy. The use of multiple stirring parts makes the stirring more thorough and improves the stirring effect.

[0047] Please see Figure 1 - Figure 12 The top surface of the mixing tank 1 is provided with a guide port, the feed hopper 101 is fixedly installed at the feed port, the storage box 201 is fixedly installed at the bottom of the feed hopper 101, the feed hopper 101 is connected to the storage box 201, the distribution box 203 is set inside the storage box 201, and the distribution box 203 is fixedly installed at the feed port, and the distribution rotating plate 204 is rotatably installed inside the distribution box 203;

[0048] When in use, the material enters the feed hopper 101, enters the distribution box 203 through the feed inlet, and enters the storage box 201 through the distribution port of the distribution box 203.

[0049] Please see Figure 1 - Figure 12 The feeding assembly 2 also includes a material distribution unit 21, which is arranged on both sides of the material distribution box 203. The material distribution unit 21 includes a lifting material distribution plate 2101, a material distribution spring 2102, a lifting guide rod 2103, and a spring mounting block 2104. The top surface of the material storage box 201 has two material distribution mounting ports. The lifting material distribution plate 2101 is slidably engaged with the material distribution mounting ports. The spring mounting block 2104 is fixedly installed on the outer side of the feeding hopper 101. One end of the material distribution spring 2102 is fixedly connected to the lifting material distribution plate 2101, and the other end is fixedly connected to the spring mounting block 2104. One end of the lifting guide rod 2103 is fixedly installed on the top surface of the lifting material distribution plate 2101, and the other end slides through the spring mounting block 2104.

[0050] When in use, when the material distribution rotating plate 204 rotates from a horizontal state to an inclined state, the rising end of the material distribution rotating plate 204 presses against the lifting material distribution plate 2101 on one side and moves it upward, while the falling end releases contact with the lifting material distribution plate 2101 on the other side, so that the material distribution port at the falling end of the material distribution rotating plate 204 opens.

[0051] Please see Figure 1 - Figure 12 The feeding assembly 2 also includes an upward moving rod 207, a downward moving rod 208, a rotating cam 209, a feeding gear 210, a feeding rack 211, a feeding electric push rod 212, an upward return spring 213, and a downward return spring 214. The upward moving rod 207 is slidably mounted on the side of the storage box 201. The upward moving rod 207 is fixedly connected to one feeding lifting plate 205, and the downward moving rod 208 is fixedly connected to another feeding lifting plate 205. Spring fixing blocks are respectively provided above the upward moving rod 207 and below the downward moving rod 208. The upward return spring 213 is fixedly mounted on the top surface of the upward moving rod 207. The rising return spring 213 is fixedly connected to the upper spring fixing block, the falling return spring 214 is fixedly installed on the bottom surface of the falling moving rod 208, and the falling return spring 214 is fixedly connected to the lower spring fixing block. The rotating cam 209 is located between the rising moving rod 207 and the falling moving rod 208. The rotating cam 209 is rotatably installed on the side of the storage box 201. The feeding gear 210 is fixedly installed on the side of the rotating cam 209. The feeding electric push rod 212 is fixedly installed on the side of the storage box 201. The output end of the feeding electric push rod 212 is fixedly connected to the feeding rack 211. The feeding rack 211 meshes with the feeding gear 210.

[0052] In use, the feeding electric actuator 212 drives the feeding rack 211 to move, the feeding rack moves and drives the feeding gear 210 to rotate, the feeding gear 210 rotates and drives the rotating cam 209 to rotate. When the rotating cam 209 rotates and contacts the rising moving rod 207 and gradually squeezes the rising moving rod 207, the rising moving rod 207 moves upward and drives the corresponding feeding lifting plate 205 to move upward, and the feeding port opens. When the rotating cam 209 releases contact with the rising moving rod 207, the rising return spring 213 drives the rising moving rod 207 to move back to its original position. When the rotating cam 209 rotates and contacts the falling moving rod 208 and gradually squeezes the falling moving rod 208, the falling moving rod 208 moves downward and drives the corresponding feeding lifting plate 205 to move downward, and the feeding port opens. When the rotating cam 209 releases contact with the falling moving rod 208, the falling return spring 214 drives the falling moving rod 208 to move back to its original position.

[0053] Please see Figure 1 - Figure 12The feeding assembly 2 also includes a material distributing rotating rod 215, a rotating gear ring 216, and a rotation damper 217. One end of the material distributing rotating rod 215 passes through the storage box 201 and the material distributing box 203 and is fixedly connected to the material distributing rotating plate 204. The other end extends out of the mixing tank 1. The rotation damper 217 is fixedly sleeved on the material distributing rotating rod 215 and is fixedly connected to the mixing tank 1. The rotating gear ring 216 is located inside the mixing tank 1 and is fixedly sleeved on the material distributing rotating rod 215.

[0054] In use, the material distribution rotating rod 215 rotates, driving the material distribution rotating plate 204 and the rotating gear ring 216 to rotate.

[0055] Please see Figure 1 - Figure 12 The feeding assembly 2 also includes a limiting unit 22, which is disposed on both sides of the feeding rack 211. The limiting unit 22 includes a lifting rack 2201, a lifting linkage rod 2202, a linkage rack 2203, a rotating gear 2204, a moving rack 2205, a moving linkage rod 2206, and a moving limiting block 2207. The lifting rack 2201 is slidably mounted on the side of the storage box 201 and meshes with the rotating gear ring 216. The lifting linkage rod 2202 is slidably mounted on the side of the storage box 201, and one end of the lifting linkage rod 2202 is fixed to the lifting rack 2201. One end is fixedly connected to the other end, and the other end is fixedly connected to the linkage rack 2203. Two gear mounting plates are fixedly installed on the side of the storage box 201. The rotating gear 2204 is rotatably installed on the side of the gear mounting plate. The linkage rack 2203 meshes with the rotating gear 2204. The moving linkage rod 2206 is slidably installed on the top surface of the storage box 201. The moving rack 2205 is fixedly connected to the moving linkage rod 2206. The moving rack 2205 meshes with the rotating gear 2204. The moving limit block 2207 is set on the side of the feeding rack 211. The moving limit block 2207 is fixedly connected to the moving linkage rod 2206.

[0056] In use, when the material distribution rotating rod 215 drives the material distribution rotating plate 204 to rotate, causing the material distribution port on one side of the rotating gear ring 216 to open, the rotation of the rotating gear ring 216 drives the lifting rack 2201 on one side of the rotating gear ring 216 to move downward. The lifting rack 2201 drives the connecting rack 2203 to move downward through the lifting connecting rod 2202. The downward movement of the connecting rack 2203 drives the rotating gear 2204 to rotate. The rotation of the rotating gear 2204 drives the moving rack 2205 to move. The movement of the moving rack 2205 drives the moving rack 2205 to move. The linkage 2206 moves, and the moving linkage 2206 drives the moving limit block 2207 to move closer to the storage box 201, so that the moving limit block 2207 moves to the path of the feeding rack 211, so that the moving rack 2205 cannot move closer to the moving limit block 2207. That is, the partition cavity 206 corresponding to the opened dispensing port cannot open the feeding port, preventing material from being introduced into the partition cavity 206 where the feeding port is not closed, so that the material directly enters the mixing tank 1, affecting the feeding operation and reducing the mixing effect.

[0057] Please see Figure 1 - Figure 12 The stirring assembly 3 also includes several stirring motors 306, which are fixedly installed on the top surface of the mixing tank 1, and the drive shafts of the stirring motors 306 are fixedly connected to the corresponding stirring drive shafts 301.

[0058] When in use, the stirring motor 306 drives the stirring drive shaft 301 to rotate.

[0059] Please see Figure 1 - Figure 12 A rotating pointer is fixedly installed on the material distribution rotating rod 215, and the side of the rotating pointer is perpendicular to the top surface of the material distribution rotating plate 204;

[0060] When in use, the state of the material distribution rotating plate 204 is monitored by rotating the pointer.

[0061] Please see Figure 1 - Figure 12 The storage box 201 is located above the stirring scraper 304 and will not affect the rotation of the stirring scraper 304.

[0062] This embodiment also discloses a mixing method for lithium battery anode materials, using the above-mentioned mixing equipment, including the following steps:

[0063] Before stirring, the lithium battery negative electrode material is poured into the feed hopper 101. The feed hopper 101 guides the lithium battery negative electrode material into the distribution box 203. The distribution rotating plate 204 rotates from a horizontal state to an inclined state, so that one of the distribution ports on both sides of the distribution box 203 is in an open state and the other is in a closed state, and the lithium battery negative electrode material is introduced into the corresponding partition cavity 206. After the distribution is completed, the distribution rotating plate 204 rotates to a horizontal state, and another lithium battery negative electrode material is poured into the feed hopper 101. The operation is repeated to introduce another lithium battery negative electrode material into another partition cavity 206.

[0064] During stirring, one feed lifting plate 205 moves, opening its corresponding feed port to introduce a portion of the lithium battery negative electrode material into the mixing tank 1. Then, the feed lifting plate 205 moves back to its original position, closing the corresponding feed port. The other feed lifting plate 205 moves, opening its corresponding feed port to introduce a portion of another type of lithium battery negative electrode material into the mixing tank 1. Then, the feed lifting plate 205 moves back to its original position, closing the corresponding feed port. The two feed lifting plates 205 reciprocate, causing the two types of lithium battery negative electrode materials to enter the mixing tank 1 alternately, resulting in an alternating distribution of the materials and making it easier to achieve the desired mixing distribution during stirring. The stirring drive shaft 301 rotates, driving the spiral stirring blades 302, the alternating stirring blades 303, and the stirring scraper 304 to rotate, stirring the lithium battery negative electrode material in the mixing tank 1. During the rotation of the stirring scraper 304, the scraper blades 305 contact the inner wall of the mixing tank 1 to prevent some lithium battery negative electrode material from adhering to the tank wall and not participating in the mixing.

[0065] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The preferred embodiments of the invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A mixing device, comprising a mixing tank, a feeding assembly, and a stirring assembly, characterized in that: The mixing tank has a feed hopper on its top surface; The feeding assembly includes a storage box, a storage partition, a dispensing box, a dispensing rotating plate, and a feeding lifting plate. The storage box is placed inside the mixing tank, the storage partition is fixedly installed inside the storage box, the storage box has a feeding port at the top, the dispensing box is placed inside the feeding port, the dispensing rotating plate is placed inside the dispensing box, the dispensing box has dispensing ports on both sides, the storage box has two feeding ports on the side, and the feeding lifting plate is placed at the feeding port. The storage partition divides the inside of the storage box into two separate cavities, with two material outlets corresponding to the two separate cavities respectively. The feeding lifting plate can move vertically to open the feeding port. The feeding assembly also includes a material distribution unit, which is located on both sides of the material distribution box. The material distribution unit includes a lifting material distribution plate, a material distribution spring, a lifting guide rod, and a spring mounting block. Two material distribution mounting ports are opened on the top surface of the storage box. The lifting material distribution plate slides with the material distribution mounting ports. The spring mounting block is fixedly installed on the outer side of the feed hopper. One end of the material distribution spring is fixedly connected to the lifting material distribution plate, and the other end is fixedly connected to the spring mounting block. The feeding assembly also includes an upward moving rod, a downward moving rod, a rotating cam, a feeding gear, a feeding rack, a feeding electric push rod, an upward return spring, and a downward return spring. The upward moving rod is slidably installed on the side of the storage box and is fixedly connected to one feeding lifting plate. The downward moving rod is fixedly connected to another feeding lifting plate. Spring fixing blocks are respectively provided above the upward moving rod and below the downward moving rod. The upward return spring is fixedly installed on the top surface of the upward moving rod and is fixedly connected to the upper spring fixing block. The downward return spring is fixedly installed on the bottom surface of the downward moving rod and is fixedly connected to the lower spring fixing block. The rotating cam is located between the upward moving rod and the downward moving rod. The feeding assembly also includes a limiting unit and a rotating gear ring. The limiting unit is located on both sides of the feeding rack. The limiting unit includes a lifting rack, a lifting linkage rod, a linkage rack, a rotating gear, a moving rack, a moving linkage rod, and a moving limiting block. The lifting rack is slidably installed on the side of the storage box and meshes with the rotating gear ring. The lifting linkage rod is slidably installed on the side of the storage box. One end of the lifting linkage rod is fixedly connected to the lifting rack, and the other end is fixedly connected to the linkage rack. Two gear mounting plates are fixedly installed on the side of the storage box. The rotating gear is rotatably installed on the side of the gear mounting plate and meshes with the rotating gear. The moving linkage rod is slidably installed on the top surface of the storage box and is fixedly connected to the moving linkage rod and meshes with the rotating gear. The moving limiting block is located on the side of the feeding rack and is fixedly connected to the moving linkage rod.

2. A mixing apparatus according to claim 1, wherein The mixing assembly includes several mixing drive shafts, spiral mixing blades, staggered mixing blades, mixing scraper rods, and several scraper blades. The mixing scraper rods are fixedly installed on the mixing drive shafts located in the middle position. The spiral mixing blades and staggered mixing blades are respectively fixedly installed on the corresponding mixing drive shafts on both sides. The scraper blades are staggered on the mixing scraper rods and are fixedly connected to the mixing scraper rods. The scraper blades are in contact with the inner wall of the mixing tank.

3. A mixing apparatus as claimed in claim 1, wherein The top surface of the mixing tank is provided with a guide port, the feed hopper is fixedly installed at the feed port, the storage box is fixedly installed at the bottom of the feed hopper, the feed hopper and the storage box are connected, the distribution box is set in the storage box and is fixedly installed at the feed port, and the distribution rotating plate is rotatably installed in the distribution box.

4. A mixing apparatus as claimed in claim 2, wherein One end of the lifting guide rod is fixedly installed on the top surface of the lifting distribution plate, and the other end slides through the spring mounting block.

5. A mixing apparatus as claimed in claim 3, wherein A rotating cam is mounted on the side of the storage box, a feeding gear is fixedly mounted on the side of the rotating cam, a feeding electric push rod is fixedly mounted on the side of the storage box, and the output end of the feeding electric push rod is fixedly connected to the feeding rack, which meshes with the feeding gear.

6. A mixing apparatus as claimed in claim 4, wherein The feeding assembly also includes a material distributing rotating rod and a rotation damper. One end of the material distributing rotating rod passes through the storage box and the material distributing box and is fixedly connected to the material distributing rotating plate. The other end passes through the mixing tank and extends out of the mixing tank. The rotation damper is fixedly sleeved on the material distributing rotating rod and is fixedly connected to the mixing tank. The rotating toothed ring is located inside the mixing tank and is fixedly sleeved on the material distributing rotating rod.

7. A mixing apparatus as claimed in claim 2, wherein The mixing assembly also includes several mixing motors, which are fixedly installed on the top surface of the mixing tank, and the drive shafts of the mixing motors are fixedly connected to the corresponding mixing drive shafts.

8. A mixing device according to claim 2, characterized in that, A rotating pointer is fixedly installed on the material distribution rotating rod, and the side of the rotating pointer is perpendicular to the top surface of the material distribution rotating plate.

9. A mixing apparatus as claimed in claim 8, wherein The storage box is located above the mixing and scraping rod, so it will not affect the rotation of the mixing and scraping rod.

10. A mixing method for a lithium battery negative electrode material, characterized by, The mixing apparatus as described in any one of claims 1-9 is used, comprising the following steps; Before stirring, the lithium battery negative electrode material is poured into the feed hopper. The feed hopper guides the lithium battery negative electrode material into the distribution box. The distribution rotating plate rotates from a horizontal state to an inclined state, so that one distribution port on both sides of the distribution box is in an open state and the other is in a closed state. The lithium battery negative electrode material is then introduced into the corresponding partition cavity. After the distribution is completed, the distribution rotating plate rotates to a horizontal state and another lithium battery negative electrode material is poured into the feed hopper. The above operation is repeated to introduce another lithium battery negative electrode material into another partition cavity. During mixing, one feed lifting plate moves, opening its corresponding feed inlet to introduce a portion of the lithium battery negative electrode material into the mixing tank. Then, the feed lifting plate moves back to its original position, closing the corresponding feed inlet. The other feed lifting plate moves, opening its corresponding feed inlet to introduce a portion of another type of lithium battery negative electrode material into the mixing tank. This same feed lifting plate moves back to its original position, closing the corresponding feed inlet. The two feed lifting plates operate in a reciprocating manner, allowing the two types of lithium battery negative electrode materials to enter the mixing tank alternately, resulting in a staggered distribution and facilitating better mixing of the two materials. The stirring drive shaft rotates, causing the spiral stirring blades, staggered stirring blades, and stirring scraper to rotate, stirring the lithium battery negative electrode material in the mixing tank. During the rotation of the stirring scraper, the scraper blades contact the inner wall of the mixing tank to prevent some lithium battery negative electrode material from adhering to the tank wall and not participating in the mixing.

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