Magnetic metal particle extraction device and lithium battery positive electrode material production device

Abstract

The utility model provides a magnetic metal particle extraction device and a lithium battery positive electrode material production device, and relates to the field of production equipment. During use, a to-be-purified material (such as lithium battery positive electrode material precursor powder) is put into the containing main body, the magnetic piece is connected to the connecting piece at the bottom of the transmission rod and extends into the containing main body, the top of the transmission rod penetrates through the mounting hole in the cover body to be connected to the driving piece, and the cover body covers the containing main body to complete mounting work. And after the driving piece is started, the transmission rod drives the magnetic piece to rotate in the to-be-purified material, magnetic metal particles are adsorbed and extracted, the cover body is detached after adsorption is completed, and the magnetic piece is taken out. The magnetic metal particle extraction device provided by the utility model can realize dry extraction, reduce the operation time, reduce the waste of water resources and reduce the discharge of heavy metal wastewater.

Description

Technical Field

[0001] The utility model relates to the field of production equipment, in particular to a magnetic metal particle extraction device and a lithium battery positive electrode material production device. Background Art

[0002] Lithium battery positive electrode materials have strict requirements on the content and size of magnetic foreign matter. If the content of magnetic foreign matter in the positive electrode material is too high, it will cause internal short circuit of the battery, and internal short circuit will cause thermal runaway, which is the main safety issue of lithium-ion batteries. At present, the content of magnetic foreign matter should be controlled at 30-50ppb, and the number of magnetic metal particles should be controlled at 0-50. The standards for foreign matter control are constantly improving, and the corresponding testing requirements are also getting higher and higher.

[0003] At present, the extraction of magnetic metal particles in the laboratory mostly adopts wet extraction, which is to put the magnetic rod encapsulated in the heat shrink tube into the tank grinding barrel. During the test, a large amount of clean water is needed to clean the extraction device, which produces a large amount of heavy metal-containing wastewater, increasing the cost of wastewater treatment.

[0004] Therefore, there is an urgent need to develop new devices and methods for extracting magnetic metal particles to avoid the generation of large amounts of wastewater containing heavy metals and reduce process costs.

[0005] In view of this, this application is filed. Utility Model Content

[0006] The utility model aims to provide a magnetic metal particle extraction device and a lithium battery positive electrode material production device, which can effectively remove the magnetic metal particles in the lithium battery positive electrode material precursor powder under the premise of reducing the generation of heavy metal wastewater.

[0007] The embodiment of the utility model is achieved as follows:

[0008] In a first aspect, the utility model provides a magnetic metal particle extraction device, comprising:

[0009] The container body is used to hold the material to be purified;

[0010] A cover body, which is detachably connected to the top of the container body and is provided with a mounting hole;

[0011] A driving member, the driving member is mounted on the cover body;

[0012] Magnetic parts, used to absorb magnetic metal particles in the material to be purified;

[0013] The top of the transmission rod passes through the mounting hole on the cover body and is connected to the driving member. The bottom of the transmission rod is provided with a connecting member connected to the magnetic member. In the working state, the transmission rod is driven to rotate by the driving member, thereby driving the magnetic member to rotate in the container body.

[0014] In an optional embodiment, the connecting piece is arc-shaped, the magnetic piece is rod-shaped, and the diameter of the magnetic piece matches the arc-shaped connecting piece so that the magnetic piece can be clamped by the arc-shaped connecting piece.

[0015] In an optional embodiment, the magnetic member includes a magnetic rod and a sleeve sleeved on the magnetic rod.

[0016] In an optional embodiment, the transmission rod extends from top to bottom, and the magnetic member extends in a horizontal direction.

[0017] In an optional embodiment, the distance between the bottom of the transmission rod and the bottom wall of the container body is 2 cm-5 cm.

[0018] In an optional embodiment, the length of the transmission rod is 40 cm-60 cm, and the height of the container body is 30 cm-50 cm.

[0019] In an optional embodiment, the cross-section of the cover is circular and the container body is cylindrical.

[0020] In an optional embodiment, the cover body and the container body are provided with mutually matching threads.

[0021] In an optional embodiment, a sealing ring is further provided outside the mounting hole on the cover body.

[0022] In a second aspect, the utility model provides a lithium battery positive electrode material production device, comprising any one of the magnetic metal particle extraction devices in the aforementioned embodiments.

[0023] The beneficial effects of the embodiments of the utility model are as follows: when in use, the material to be purified (such as precursor powder of lithium battery positive electrode material) is placed in the container body, the magnetic part is connected to the connecting part at the bottom of the transmission rod, and is extended into the container body, so that the top of the transmission rod is connected to the driving part through the mounting hole on the cover body, and the cover body is closed on the container body to complete the installation work. After the driving part is turned on, the magnetic part is driven by the transmission rod to rotate in the material to be purified, and the magnetic metal particles are adsorbed and extracted. After the adsorption is completed, the cover body is disassembled and the magnetic part is taken out. The magnetic metal particle extraction device provided by the utility model can realize dry extraction, which can reduce the operation time, and can also reduce the waste of water resources and reduce the discharge of heavy metal wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a magnetic metal particle extraction device provided in an embodiment of the utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the middle cover body;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the transmission rod.

[0028] Icon: 100 - magnetic metal particle extraction device; 110 - container body; 120 - cover body; 121 - mounting hole; 122 - sealing ring; 130 - driving member; 140 - transmission rod; 141 - connecting member; 150 - magnetic member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Please refer to Figure 1 The embodiment of the utility model provides a magnetic metal particle extraction device 100 , including: a container body 110 , a cover body 120 , a driving member 130 , a transmission rod 140 and a magnetic member 150 .

[0036] The container body 110 is used to hold the material to be purified (such as lithium battery positive electrode material precursor powder), and the cover body 120 is detachably connected to the top of the container body 110. The detachable connection method is not limited, and the detachable connection can be achieved by means of snaps, threads, etc.

[0037] In some embodiments, the cross-section of the cover body 120 is circular, and the container body 110 is cylindrical, which is convenient for connecting the cover body 120 and the container body 110 and is easy to manufacture. The cylindrical container body 110 has a flat and smooth bottom surface and a cylindrical edge, and the cover body 120 is a circle with holes. The material of the container body 110 is not limited, and it can be made of polyamide fiber (nylon) material, but it is not limited to this; the material of the cover body 120 is not limited, and it can be made of polyamide fiber (nylon) material, but it is not limited to this. The device is made of polyamide fiber (nylon) material, which can not only ensure the mechanical strength requirements, but also make the surface smooth and non-sticky, so that the metal particles can be completely adsorbed by the magnetic rod, and only a brush is needed for cleaning.

[0038] In some embodiments, a first thread is provided on the top outer wall of the container body 110, and a second thread matching the first thread is provided on the inner wall of the cover body 120, and the threaded connection facilitates disassembly. A sealing ring may also be provided inside the cover body 120, and after the cover body 120 is covered on the container body 110, a better sealing effect is achieved.

[0039] Furthermore, please combine Figure 1 and Figure 2The cover 120 is provided with a mounting hole 121, which can be located at the center of the cover 120, but is not limited thereto. The driving member 130 is installed on the top of the cover 120, and the transmission rod 140 passes through the mounting hole 121. The top of the transmission rod 140 is connected to the driving member 130, and the bottom of the transmission rod 140 is connected to the magnetic member 150. In the working state, the driving member 130 drives the transmission rod 140 to rotate, thereby driving the magnetic member 150 to rotate in the container body 110, adsorbing the magnetic metal particles in the contained material to be purified, and realizing dry extraction.

[0040] Specifically, the form of the driving member 130 is not limited, and it can be a common motor, and the specific model is not limited, as long as it can drive the transmission rod 140 to rotate stably.

[0041] In some embodiments, a sealing ring 122 is further provided outside the mounting hole 121 on the cover 120, and the sealing ring 122 may be a rubber sealing ring. A protrusion may be formed at the mounting hole 121, and the sealing ring 122 is sleeved on the protrusion. The cover 120 with the rubber sealing ring can ensure a closed environment during the experiment, prevent the material from being contaminated, and avoid environmental pollution caused by dust during the stirring process.

[0042] In some embodiments, please combine Figure 1 and Figure 3 The top of the transmission rod 140 passes through the mounting hole 121 on the cover body 120 and is connected to the driving member 130. The bottom of the transmission rod 140 is provided with a connecting member 141 connected to the magnetic member 150. The connection between the transmission rod 140 and the magnetic member 150 is achieved through the connecting member 141.

[0043] The specific form of the connecting member 141 is not limited, and can be a common structure that can stably clamp. In some embodiments, the connecting member 141 is arc-shaped, the magnetic member 150 is rod-shaped, and the diameter of the magnetic member 150 matches the arc-shaped connecting member 141, so that the magnetic member 150 can be clamped by the arc-shaped connecting member 141, and the magnetic member 150 can be removed more conveniently.

[0044] It should be noted that the specific structure of the connecting member 141 is not limited to Figure 3 As shown in , other connection structures that are easy to disassemble can be used as long as the rod-shaped structure can be stably installed.

[0045] In some embodiments, the transmission rod 140 extends from top to bottom, and the magnetic member 150 extends in the horizontal direction, and the two are in an approximately vertical state. The so-called "extending from top to bottom" is not strictly extending in the vertical direction, and can be at a certain angle, which is within the protection scope of the present utility model. The so-called "extending in the horizontal direction" is not strictly horizontal, and can be at a certain angle to the horizontal plane, which is within the protection scope of the present utility model.

[0046] Furthermore, the distance between the bottom of the transmission rod 140 and the bottom wall of the container body 110 is 2cm-5cm, the length of the transmission rod 140 is 40cm-60cm, and the height of the container body 110 is 30cm-50cm. By precisely controlling the specific dimensions of the transmission rod 140 and the container body 110 and the distance between the bottoms thereof, after the precursor material (such as the nickel-cobalt-manganese precursor material) is placed, the bottom of the transmission rod 140 can be located in the precursor material, so that the magnetic member 150 can fully contact the sample, and the magnetic metal particles in the precursor material can be easily adsorbed.

[0047] Specifically, the distance between the bottom of the transmission rod 140 and the bottom wall of the container body 110 can be 2cm, 4cm, 5cm, etc., the length of the transmission rod 140 can be 40cm, 45cm, 50cm, 55cm, 60cm, etc., and the height of the container body 110 can be 30cm, 35cm, 40cm, 45cm, 50cm, etc.

[0048] The magnetic member 150 can absorb magnetic metal particles in the material to be purified. The specific material is not limited and can be a common commercially available magnetic rod with a magnetic force of more than 6000GS, which can be used for metal particle extraction.

[0049] In some embodiments, the magnetic member 150 includes a magnetic rod and a tube sleeve (not shown) sleeved on the magnetic rod. The tube sleeve does not affect the magnetic rod's adsorption of metal particles. It can be a general heat shrink tube, and the inner diameter of the heat shrink tube just matches the outer diameter of the magnetic rod. After the adsorption is completed, the cover 120 can be opened, the magnetic member 150 can be removed, and the tube sleeve can be removed to separate the magnetic rod and the metal particles. The operation is convenient and reduces the process time and consumables.

[0050] Specifically, the length of the magnetic rod is slightly smaller than the inner diameter of the container body 110 , and the specific size is not limited and can be reasonably designed according to process requirements.

[0051] It should be noted that when in use, the material to be purified (such as lithium battery positive electrode material precursor powder) is placed in the container body 110, the tube sleeve is put on the magnetic rod and fixed on the connector 141 at the bottom of the transmission rod 140, the transmission rod 140 is passed through the mounting hole 121 in the center of the cover body 120 to connect with the driver 130, the rubber sealing ring on the mounting hole 121 on the cover body 120 is checked, and the cover body 120 is tightened to complete the installation. The driver 130 is turned on and rotated at a low speed (the speed is not limited), and the magnetic member 150 is driven by the transmission rod 140 to rotate at a low speed in the material to be purified to absorb and extract magnetic metal particles. After rotating for 20 minutes, the magnetic rod extracted for the first time is taken out, and the magnetic rod extracted for the first time is placed in the clean container body 110 using the same steps, and the motor is started to rotate at a low speed. After the excess material is sprinkled, the magnetic rod extracted for the second time is taken out, and the metal particles attached to the heat shrink tube are scraped into the beaker with a ceramic knife, and the small magnetic block is rotated against the wall of the cup for enrichment.

[0052] It should be added that the magnetic metal particle extraction device 100 provided by the utility model can avoid using a large amount of clean water as a medium for extraction, does not produce a large amount of heavy metal-containing wastewater, and the dry material is also conducive to the classification and recycling of waste materials. In addition, the use of this extraction device can reduce the cost of magnetic metal particle extraction, reduce operation time, protect the environment, and save resources.

[0053] The embodiment of the utility model also provides a lithium battery positive electrode material production device, including the above-mentioned magnetic metal particle extraction device 100, and may also include a reaction device for precursor production, a sintering furnace for preparing positive electrode materials, etc.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic metal particle extraction device, characterized in that: include: The container body is used to hold the material to be purified; A cover body, the cover body is detachably connected to the top of the container body, and a mounting hole is provided on the cover body; A driving member, wherein the driving member is mounted on the cover body; A magnetic member, used for absorbing magnetic metal particles in the material to be purified; A transmission rod, the top of which passes through the mounting hole on the cover body and is connected to the driving member, and the bottom of the transmission rod is provided with a connecting member connected to the magnetic member. In a working state, the transmission rod is driven to rotate by the driving member, thereby driving the magnetic member to rotate in the container body.

2. The magnetic metal particle extraction device according to claim 1, characterized in that: The connecting piece is arc-shaped, the magnetic piece is rod-shaped, and the diameter of the magnetic piece matches the arc-shaped connecting piece so that the magnetic piece can be clamped by the arc-shaped connecting piece.

3. The magnetic metal particle extraction device according to claim 2, characterized in that: The magnetic component comprises a magnetic rod and a pipe sleeve sleeved on the magnetic rod.

4. The magnetic metal particle extraction device according to claim 2, characterized in that: The transmission rod extends from top to bottom, and the magnetic member extends in a horizontal direction.

5. The magnetic metal particle extraction device according to claim 4, characterized in that: The distance between the bottom of the transmission rod and the bottom wall of the container body is 2 cm-5 cm.

6. The magnetic metal particle extraction device according to claim 5, characterized in that: The length of the transmission rod is 40cm-60cm, and the height of the container body is 30cm-50cm.

7. The magnetic metal particle extraction device according to claim 1, characterized in that: The cross section of the cover is circular, and the container body is cylindrical.

8. The magnetic metal particle extraction device according to claim 7, characterized in that: The cover body and the container body are provided with threads which cooperate with each other.

9. The magnetic metal particle extraction device according to claim 1, characterized in that: A sealing ring is also arranged outside the mounting hole on the cover body.

10. A lithium battery positive electrode material production device, characterized in that: The invention comprises the magnetic metal particle extraction device as described in any one of claims 1 to 9.

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