A powder mixing device for battery cathode materials

Abstract

The utility model relates to powder mixing equipment technical field discloses a kind of powder mixing equipment for battery positive electrode material, comprising: fixed plate;First drive element is horizontally arranged in one side of fixed plate, and the midpoint of the driving end of first drive element is connected with one side of fixed plate, and first drive element is used to drive fixed plate to carry out vertical overturning;Receptacle is provided with multiple, and receptacle is set on fixed plate, and receptacle has the accommodating cavity for placing material to be stirred;When first drive element drives fixed plate vertical overturning, the material in the accommodating cavity of receptacle mixes, the utility model is driven by first drive element, let first drive element drive fixed plate vertical overturning, material is placed into receptacle, multiple receptacles are set to satisfy different proportion or different material is placed into different receptacle in experiment, let first drive element to the vertical overturning of fixed piece, different receptacles are stirred, to satisfy the purpose of small batch production for experiment.

Description

Technical Field

[0001] This utility model relates to the field of powder mixing equipment technology, and specifically to a powder mixing equipment for battery cathode materials. Background Technology

[0002] The positive electrode material needs to be uniformly mixed with conductive agents (such as carbon black) and binders (such as PVDF). Mixing with conductive agents (such as carbon black) can significantly improve the conductivity of the positive electrode material. Positive electrode active materials are mostly semiconductors or insulators with poor conductivity. Adding conductive agents can form a conductive network between active materials and between active materials and current collectors, accelerating electron movement, reducing electrode contact resistance, and thus improving the battery's charge and discharge efficiency.

[0003] Chinese patent document CN210584568U discloses a mixing device specifically for the production of cathode materials for lithium-ion batteries. It mainly includes a mixing body for mixing materials, and the mixing body is equipped with a stirring unit, a flow guiding unit and a discharge port. The stirring unit ensures that the materials can be mixed evenly through efficient stirring action. The flow guiding unit guides the flow of materials and prevents dead zones from occurring during the mixing process.

[0004] However, the overall space occupied by the equipment is relatively large. Experimental research and development and small-batch trial production usually require more flexible equipment with a smaller footprint. The large equipment in the existing technology not only occupies laboratory space, but also requires multiple devices to work at the same time when multiple batches of experiments are needed. The high cost and large footprint lead to unnecessary waste of experimental research and development resources. Utility Model Content

[0005] In view of this, the present invention provides a powder mixing device for battery cathode materials to solve the problem that the existing mixing equipment cannot meet the needs of small-batch production experiments.

[0006] This utility model provides a powder mixing device for battery cathode materials, including: a fixed plate, which is horizontally arranged;

[0007] The first driving component is horizontally disposed on one side of the fixed plate. The driving end of the first driving component is connected to the midpoint of one side of the fixed plate. The first driving component is used to drive the fixed plate to rotate vertically.

[0008] Multiple containers are provided, and the containers are disposed on the fixed plate. Each container has a cavity for holding the material to be stirred. When the first driving member drives the fixed plate to rotate vertically, the material in the cavity of the container is mixed.

[0009] By setting a first driving component, the fixed plate is driven to rotate vertically, and the material is placed into the container. Setting multiple containers can meet the needs of placing different proportions or different materials into different containers during the experiment. When the first driving component rotates the fixed plate vertically, it stirs the different containers, thereby meeting the purpose of small-batch production for the experiment.

[0010] In one optional embodiment, a rotating member is rotatably disposed on the fixed plate, the rotation surface of the rotating member being parallel to the plate surface of the fixed plate, and the receiving member is disposed on the rotating member.

[0011] By setting up a rotating component, the rotating component is mounted on a fixed plate. When the fixed plate is flipped vertically, the rotating component rotates freely during the flipping process, thereby fully mixing the materials.

[0012] In one optional embodiment, a through groove is provided on the fixing plate in a direction perpendicular to the fixing plate, and the rotating member is rotatably disposed in the through groove.

[0013] By setting a through groove and placing the rotating part inside the through groove, the rotation of the rotating part can be restricted by the through groove, thereby satisfying the rotation limit of the rotating part.

[0014] In one optional embodiment, a second driving member is provided on the fixed plate, the driving end of the second driving member is connected to the rotating member, and the second driving member is used to drive the rotating member to rotate when the fixed plate is vertically flipped.

[0015] By setting a second driving component, while the first driving component drives the fixed plate to rotate vertically, the second driving component drives the rotating component to rotate, thereby achieving rapid stirring of the container. At this time, the material achieves uniform mixing in multidimensional motion, which improves experimental efficiency and mixing quality.

[0016] In one alternative embodiment, the receiving element is arranged in a circumferential array on the rotating element.

[0017] By arranging the containers in a circular pattern, each container can be evenly stressed when the rotating component rotates, thus further optimizing the material mixing effect.

[0018] In one optional embodiment, the rotating member is provided with a third driving member, and multiple third driving members are provided. The driving end of the third driving member is connected to the receiving member, and the third driving member is used to drive the receiving member to rotate along its own axis.

[0019] By setting a third driving component that independently rotates the container while the rotating component rotates, the material is mixed in multiple layers in three-dimensional space, which greatly improves the uniformity of mixing and the accuracy of experimental results.

[0020] In one alternative embodiment, the receiving member includes a housing and a cover, the housing having a receiving cavity with an opening facing away from the fixing plate, and the cover being detachably disposed at the opening of the housing.

[0021] By setting the container as a shell and a cover, the material to be stirred can be placed into the shell by opening the cover, and the opening is sealed with the cover to ensure that the material is always inside the shell during stirring.

[0022] In one optional embodiment, the cover is provided with an air inlet pipe and an air outlet pipe, the outlet of the air inlet pipe is connected to the receiving cavity, and inert gas is filled into the receiving cavity through the inlet of the air inlet pipe.

[0023] By setting up an air intake pipe and filling it with inert gas, it is possible to prevent the materials from coming into contact with air during the mixing process, which could cause the oxides to absorb moisture or oxidize, thus affecting battery performance.

[0024] In one optional embodiment, a filter screen is slidably disposed within the receiving cavity of the receiving member along the extending direction of the receiving cavity, and the filter screen is disposed parallel to and spaced apart from the bottom surface of the receiving cavity.

[0025] The filter screen can slide within the receiving cavity, allowing it to move with the material, thus dispersing the material and inhibiting its agglomeration.

[0026] In one alternative embodiment, the receiving cavity is provided with zirconium beads for mixing materials, and a plurality of zirconium beads are provided.

[0027] Zirconium beads can break up the agglomeration of raw material particles during stirring or grinding, so that the components are evenly distributed and the battery performance is not inconsistent due to uneven local composition. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a front view of a powder mixing device for battery cathode materials according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 The front view shown is of a powder mixing apparatus for battery cathode materials.

[0031] Figure 3 for Figure 1 A three-dimensional view of the internal components.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Fixed plate; 2. First driving component; 3. Receiving component; 4. Rotating component; 5. Housing; 6. Inlet pipe; 7. Filter screen; 8. Zirconium beads; 9. Mounting shell. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0036] like Figure 1 , Figure 2 As shown in the embodiment of this utility model, a powder mixing device for battery cathode materials is provided, comprising: a fixed plate 1, a first driving member 2, and a receiving member 3. The fixed plate 1 is horizontally arranged; the first driving member 2 is horizontally arranged on one side of the fixed plate 1, and the driving end of the first driving member 2 is connected to the midpoint of one side of the fixed plate 1 to maintain the symmetry of the flipping. The first driving member 2 is used to drive the fixed plate 1 to perform vertical flipping. Vertical flipping refers to the process of inverting the object with the horizontal axis as a reference. The first driving member 2 can drive the fixed plate 1 to perform multiple vertical flipping, that is, the fixed plate 1 rotates with the horizontal axis as a reference, thereby mixing the material. Among them, multiple receiving members 3 are arranged on the fixed plate 1. The receiving members 3 have receiving cavities for placing the material to be stirred; when the first driving member 2 drives the fixed plate 1 to perform vertical flipping, the material in the receiving cavity of the receiving member 3 is mixed.

[0037] By setting the first driving component 2, the first driving component 2 drives the fixed plate 1 to rotate vertically multiple times, placing the material into the container 3. Setting multiple containers 3 can meet the needs of placing different proportions or different materials into different containers 3 during the experiment. When the first driving component 2 rotates the fixed plate vertically, it stirs the materials in different containers 3 to meet the purpose of small-batch production for the experiment.

[0038] Specifically, the first fixing plate 1 is a rectangular plate. Alternatively, as an alternative implementation, the first fixing plate 1 can also be circular. When the first fixing plate 1 is circular, the driving end of the first driving member 2 is connected to the side end face of the circular first fixing plate 1, and the driving end of the first driving member 2 extends through the center of the first fixing plate 1.

[0039] Specifically, the first driving component 2 is an electric motor. Alternatively, the first driving component 2 can also be a hydraulic motor.

[0040] like Figure 2 As shown, in this embodiment, a rotating member 4 is rotatably mounted on the fixed plate 1. The rotation surface of the rotating member 4 is parallel to the surface of the fixed plate 1. That is, when the fixed plate 1 is in a horizontal state, the rotating member 4 is located on the upper surface of the fixed plate 1. At this time, the receiving member 3 is mounted on the rotating member 4. When the rotating member 4 rotates, it rotates around its own center line, which extends vertically. After material is placed into the receiving member 3, the rotation of the rotating member 4 will cause the material in the receiving member 3 to mix. Then, the first driving member 2 drives the fixed plate 1 to flip, further mixing the material in the receiving member 3. By setting the rotating member 4 so that it is rotatably mounted on the fixed plate 1, when the fixed plate 1 flips vertically, the rotating member 4 rotates freely during the flipping process, thereby fully mixing the material. It should be noted that, as an alternative implementation, the rotating member 4 may not be mounted on the fixed plate 1, and the receiving member 3 may be directly mounted on the fixed plate 1 to achieve mixing of the material in the receiving member 3.

[0041] Specifically, the rotating component 4 is a circular plate. Alternatively, the rotating component 4 can also be a square plate.

[0042] like Figure 2 As shown, in this embodiment, a through groove is provided on the fixed plate 1 along a direction perpendicular to the fixed plate 1. The rotating member 4 is rotatably disposed within the through groove, which extends through the fixed plate 1 along a direction perpendicular to its surface. By providing the through groove and placing the rotating member 4 within it, the rotation of the rotating member 4 is restricted by the through groove, thereby satisfying the requirement for limiting the rotation of the rotating member 4. It should be noted that, as an alternative implementation, the through groove may not be provided, and the rotating member 4 may be directly rotatably disposed on the fixed plate 1.

[0043] Specifically, the through groove is a circular groove, and the rotating component 4 is a circular plate. The rotating component 4 is rotatably disposed within the through groove. Specifically, a connecting rod extending towards the center of the through groove is provided on the fixed plate 1. The connecting rod has a square cross-section, and three connecting rods are arranged in an array along the circumference of the through groove. The three connecting rods are connected at the center, and a bearing is provided at the center of the connecting rod. A rotating shaft is provided on the rotating component 4, and the rotating shaft passes through the inner ring of the bearing.

[0044] like Figure 2 As shown, in this embodiment, a second driving component, which is a motor, is provided on the fixed plate 1. The driving end of the second driving component is connected to the rotating component 4. The second driving component is used to drive the rotating component 4 to rotate when the fixed plate 1 is vertically flipped. By providing the second driving component, while the first driving component 2 drives the fixed plate 1 to rotate vertically, the second driving component drives the rotating component 4 to rotate, thereby achieving rapid stirring of the container 3. At this time, the material achieves uniform mixing in multidimensional motion, improving experimental efficiency and mixing quality. It should be noted that, as an alternative implementation, the driving end of the second driving component may not be directly connected to the rotating component 4. The driving end of the second driving component is provided with a rack, and the rotating component 4 is provided with a rotating shaft. The rotating shaft is rotatably connected to the fixed plate 1, and a gear is provided on the rotating shaft. The rack meshes with the gear. When the rack moves back and forth along its own length direction, it drives the gear to rotate, thereby driving the rotating component 4 to rotate.

[0045] Specifically, the second driving component is mounted on the connecting rod, and the drive shaft of the motor is connected to the rotation shaft of the rotating component 4 via a coupling. When the first driving component 2 drives the fixed plate 1 to rotate, the second driving component also rotates along with the fixed plate 1, and at the same time, the second driving component drives the rotating component 4 to rotate.

[0046] like Figure 2 As shown, in this embodiment, the receiving elements 3 are arranged in a circumferential array on the rotating element 4. That is, multiple receiving elements 3 are arranged in a circle with the center point of the rotating element 4 as the center, and all receiving elements 3 are located on the end face of the rotating element 4 away from the second driving element. By arranging the receiving elements 3 in a circumferential manner, each receiving element 3 can be evenly stressed when the rotating element 4 rotates, further optimizing the material mixing effect. It should be noted that, as an alternative implementation, the receiving elements 3 can also be arranged in a linear array.

[0047] Specifically, the number of the receiving element 3 is not limited. In this embodiment, the number of receiving elements 3 is six, but it can also be three, four, etc.

[0048] like Figure 2As shown, in this embodiment, a third driving member is provided on the rotating member 4. Multiple third driving members are provided, and their driving ends are connected to the receiving member 3. The third driving member drives the receiving member 3 to rotate along its own axis. The third driving member is a small motor, and each motor independently controls one receiving member 3, ensuring that each receiving member 3 rotates simultaneously with the rotation of the fixed plate 1. Specifically, the third driving member is located on the side of the rotating member 4 facing the second driving member. By setting the third driving member to independently rotate the receiving member 3 while the rotating member 4 rotates, the material is mixed in multiple layers in three-dimensional space, greatly improving the uniformity of mixing and the accuracy of experimental results. It should be noted that, as an alternative implementation, the third driving member can be omitted, and the receiving member 3 can be fixedly mounted on the rotating member 4 to achieve material mixing.

[0049] like Figure 2 As shown, in this embodiment, the receiving component 3 includes a shell 5 and a cover. The shell 5 is cylindrical and has a receiving cavity. The receiving cavity has an opening on the side away from the fixing plate 1, i.e., the upper end face of the shell 5 is the opening. The cover is detachably installed at the opening to seal it. After removal, materials can be placed into the shell 5. By setting the receiving component 3 as a shell 5 and a cover, the material to be stirred can be placed into the shell 5 by opening the cover, while the opening is sealed with the cover to ensure that the material is always inside the shell 5 during stirring. It should be noted that, as an alternative implementation, the receiving component 3 can also be set to other shapes, such as square or elliptical. In addition, an observation window can be provided on the shell 5 to facilitate personnel to observe the situation inside the shell 5 from the outside.

[0050] Specifically, the housing 5 is provided with external threads, and the cover is provided with internal threads, so that the cover can be installed onto the housing 5 through the threads.

[0051] Specifically, the diameter of shell 5 is 10cm and the height is 15cm.

[0052] like Figure 2As shown, in this embodiment, the cover is provided with an air inlet pipe 6 and an air outlet pipe. Both air inlet pipes 6 are equipped with one-way valves, which allow external air to enter while preventing internal air leakage. An on / off valve is provided on the air outlet pipe to prevent leakage of internal inert gas. The outlet of the air inlet pipe 6 is connected to the receiving cavity. In practice, the inlet of the air inlet pipe 6 fills the receiving cavity with inert gas, and the on / off valve of the air outlet pipe is opened to draw out the internal air, filling the casing 5 with inert gas. By providing the air inlet pipe 6 and filling it with inert gas, it is possible to prevent the materials from contacting air during mixing, which could lead to oxides absorbing moisture or oxidizing and affecting battery performance. It should be noted that, as an alternative implementation, only the air inlet pipe 6 can be provided, with an on / off valve installed on it. The valve is first opened to draw out internal air, then inert gas is filled in, and finally the valve is closed.

[0053] like Figure 2 As shown, in this embodiment, a filter screen 7 is slidably disposed within the receiving cavity of the receiving member 3 along the extending direction of the receiving cavity. The filter screen 7 is parallel to and spaced apart from the bottom surface of the receiving cavity. During the flipping process of the fixing plate 1, the filter screen 7 can slide within the receiving cavity, allowing it to move with the material and disperse it, thus inhibiting material agglomeration. Specifically, the filter screen 7 is a circular mesh with multiple mesh openings. It should be noted that, as an alternative implementation, the filter screen 7 can be omitted while still achieving material mixing.

[0054] Specifically, the filter screen 7 has a filtration accuracy of 100 mesh. Two grooves are symmetrically arranged on the receiving cavity, with openings at the top. Two protrusions corresponding to the grooves are symmetrically arranged on the outer edge of the filter screen 7. During installation, align the two protrusions of the filter screen 7 with the grooves and place the filter screen 7 into the receiving cavity, thus allowing the filter screen 7 to slide during the flipping process.

[0055] like Figure 2 As shown, in this embodiment, a plurality of zirconium beads 8 for mixing materials are disposed within the receiving cavity. The zirconium beads 8 are spherical, a prior art material. During stirring or grinding, the zirconium beads 8 can break up the agglomeration of raw material particles, ensuring uniform distribution of each component and avoiding inconsistent battery performance caused by uneven local composition.

[0056] Installation method for powder mixing equipment for battery cathode materials: such as Figure 1As shown, a small machine tool is included. The machine tool includes a mounting housing 9 with a rotating door. Opening the rotating door reveals a receiving cavity. A fixed plate 1 is horizontally positioned within the receiving cavity of the mounting housing 9. A first driving member 2 is mounted along the longitudinal extension path of the fixed plate 1. Bearings are provided on opposite sides of the receiving cavity, and the two ends of the fixed plate 1 along its length are rotatably mounted on the bearings. The driving end of the first driving member 2 is connected to the midpoint of one side of the fixed plate 1 to maintain the symmetry of the rotation. The first driving member 2 is responsible for driving the fixed plate 1 to rotate vertically.

[0057] A through groove is provided on the fixed plate 1, and a rotating component 4 is installed in the through groove, ensuring that the rotation surface of the rotating component 4 is parallel to the surface of the fixed plate 1. A second driving component is installed on the rotating component 4, ensuring that the driving end of the second driving component is connected to the rotating component 4. The second driving component is used to drive the rotating component 4 to rotate when the fixed plate 1 is vertically flipped. Receiving components 3 are arranged in a circumferential array on the rotating component 4. A third driving component is installed on the rotating component 4, ensuring that its driving end is connected to the receiving component 3. The third driving component is used to drive the receiving component 3 to rotate along its own axis. Each receiving component 3 consists of a housing 5 and a cover. The housing 5 has a receiving cavity with an opening on the side facing away from the fixed plate 1. The cover is detachably installed at the opening. An air inlet pipe 6 and an air outlet pipe are installed on the cover, ensuring that the outlet of the air inlet pipe 6 is connected to the receiving cavity.

[0058] Working principle:

[0059] When the equipment starts working, the first driving component 2 drives the fixed plate 1 to rotate vertically, while the second driving component drives the rotating component 4 to rotate, which mixes the material in the container 3. During this process, the third driving component synchronously drives the container 3 to rotate along its own axis, so that the material can be mixed in multiple layers in different rotation directions, which greatly improves the uniformity of stirring and the accuracy of experimental results.

[0060] During the stirring process, inert gas can be filled into the containment chamber through the air inlet pipe 6 to prevent the material from absorbing moisture or oxidizing due to contact with air. Simultaneously, the filter screen 7 effectively intercepts large particulate impurities, ensuring the purity of the material. Zirconium beads 8 break up the agglomeration of raw material particles during stirring or grinding, ensuring a uniform distribution of all components.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A powder mixing apparatus for battery cathode materials, characterized in that, include: Fixed plate (1), horizontally set; The first driving member (2) is horizontally disposed on one side of the fixed plate (1). The driving end of the first driving member (2) is connected to the midpoint of one side of the fixed plate (1). The first driving member (2) is used to drive the fixed plate (1) to rotate vertically. Multiple containers (3) are provided. The containers (3) are disposed on the fixed plate (1). The containers (3) have a cavity for placing the material to be stirred. When the first driving member (2) drives the fixed plate (1) to rotate vertically, the material in the cavity of the container (3) is mixed.

2. The powder mixing apparatus for battery cathode materials according to claim 1, characterized in that, A rotating component (4) is rotatably disposed on the fixed plate (1), the rotating surface of the rotating component (4) is parallel to the plate surface of the fixed plate (1), and the receiving component (3) is disposed on the rotating component (4).

3. The powder mixing apparatus for battery cathode materials according to claim 2, characterized in that, The fixed plate (1) is provided with a through groove in a direction perpendicular to the fixed plate (1), and the rotating member (4) is rotatably disposed in the through groove.

4. The powder mixing apparatus for battery cathode materials according to claim 2, characterized in that, The fixed plate (1) is provided with a second driving member, the driving end of the second driving member is connected to the rotating member (4), and the second driving member is used to drive the rotating member (4) to rotate when the fixed plate (1) is vertically flipped.

5. The powder mixing apparatus for battery cathode materials according to claim 4, characterized in that, The receiving member (3) is arranged in a circumferential array on the rotating member (4).

6. The powder mixing apparatus for battery cathode materials according to claim 5, characterized in that, The rotating member (4) is provided with a third driving member, and there are multiple third driving members. The driving end of the third driving member is connected to the receiving member (3). The third driving member is used to drive the receiving member (3) to rotate along its own axis.

7. The powder mixing apparatus for battery cathode materials according to any one of claims 1-6, characterized in that, The receiving member (3) includes a housing (5) and a cover, the housing (5) having a receiving cavity with an opening on the side away from the fixing plate (1), and the cover being detachably disposed at the opening of the housing (5).

8. The powder mixing apparatus for battery cathode materials according to claim 7, characterized in that, The cover is provided with an air inlet pipe (6) and an air outlet pipe. The outlet of the air inlet pipe (6) is connected to the receiving cavity, and inert gas is filled into the receiving cavity through the inlet of the air inlet pipe (6).

9. The powder mixing apparatus for battery cathode materials according to claim 8, characterized in that, A filter screen (7) is slidably disposed in the cavity of the receiving member (3) along the extending direction of the cavity, and the filter screen (7) is disposed parallel to and spaced apart from the bottom surface of the cavity.

10. The powder mixing apparatus for battery cathode materials according to claim 7, characterized in that, The cavity is provided with zirconium beads (8) for mixing materials, and a plurality of zirconium beads (8) are provided.

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