Refining powder removing equipment for retired battery pole piece

Abstract

The utility model discloses refinement powder removal equipment for a retired battery pole piece. The refinement powder removal equipment comprises a pole piece granulator, a mechanical mill, a catcher and a vibrating screen which are communicated in sequence, the pole piece granulator is communicated with the mechanical mill through a pipeline, the mechanical mill is communicated with the catcher through a pipeline, and the pole piece catcher is communicated with the vibrating screen through a pipeline. According to the utility model, after a pole piece is crushed for the first time by the pole piece granulator, fragments are ground for the second time by the mechanical mill, so that the particle size of crushed metal impurities is larger than that of electrode materials, the electrode materials and the metal impurities are conveyed into the vibrating screen by the catcher and the induced draft fan, and then the electrode materials and the metal impurities are screened and sorted according to the particle size difference; and the content of metal impurities and the impurity removal cost in the recycling process can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a fine powder removal device for retired battery electrodes. Background Technology

[0002] Lithium-ion battery electrodes are the core components of lithium-ion batteries, mainly consisting of positive and negative electrodes. The positive electrode typically uses active materials such as lithium cobalt oxide and lithium nickel cobalt manganese oxide as its main components, with the addition of conductive agents, binders, and other auxiliary materials, and is then coated onto an aluminum foil current collector. The negative electrode generally uses materials with good lithium intercalation properties, such as graphite, as its active material, and is similarly coated onto a copper foil current collector after the addition of relevant auxiliary materials. The performance of the lithium-ion battery electrodes directly affects key performance indicators of the lithium-ion battery, such as energy density, charge / discharge efficiency, and cycle life.

[0003] After retirement, lithium batteries undergo meticulous dismantling. The dismantled positive and negative electrode sheets are then pulverized and recycled using hydrometallurgical methods. However, current pulverizing equipment has a high content of common metal impurities (aluminum in the positive electrode and copper in the negative electrode) in the positive and negative electrodes, which increases the cost of impurity removal during the subsequent recycling process. This is not conducive to the subsequent recovery of precious metals and the recycling of positive and negative electrode materials. Utility Model Content

[0004] The purpose of this utility model is to provide a fine powder removal device for retired battery electrodes in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The electrode granulator, mechanical mill, collector, and vibrating screen are connected in sequence.

[0007] The electrode granulator is connected to the mechanical mill via a pipeline, and the electrode granulator is used for primary crushing of materials;

[0008] The mechanical mill is connected to the collector via a pipeline, and the mechanical mill is used for secondary grinding of materials.

[0009] The collector is connected to the vibrating screen via a pipeline. The collector is used to collect materials, and the vibrating screen is used to screen the materials.

[0010] As a further description of the above technical solution, the electrode granulator and the vibrating screen are arranged at the bottom of the support platform, and the mechanical mill and the collector are arranged at the top of the support platform.

[0011] As a further description of the above technical solution, the electrode granulator is provided with a feeding and crushing port on one side and a discharge port on the other side.

[0012] As a further description of the above technical solution, a mold cavity is provided in the middle of the mechanical mill, and the mold cavity of the mechanical mill is connected to the discharge port of the electrode granulator through a pipeline.

[0013] As a further description of the above technical solution, the pipeline connecting the mechanical mill and the electrode granulator is detachably connected via a flange.

[0014] As a further description of the above technical solution, a feed inlet is provided at the bottom of one side of the collector, and the feed inlet is connected to the mold cavity of the mechanical mill through a pipeline.

[0015] As a further description of the above technical solution, an air inlet is provided on the top of the other side of the trap, and the air inlet is connected to the induced draft fan through a pipeline.

[0016] As a further description of the above technical solution, the pipeline connecting the collector to the mechanical mill and the induced draft fan is detachably connected via a flange.

[0017] As a further description of the above technical solution, the bottom of the collector is provided with a powder outlet, which is connected to the vibrating screen through a pipeline.

[0018] As a further description of the above technical solution, the pipeline connecting the collector and the vibrating screen is detachably connected via a flexible connection.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention involves first crushing the electrode sheet using an electrode sheet granulator, followed by a second grinding of the fragments using a mechanical mill. This process ensures that the particle size of the metal impurities after crushing is larger than that of the electrode material. The electrode material and metal impurities are then transported to a vibrating screen via a collector and a blower, where they are separated and screened based on their particle size differences. This effectively reduces the content of metal impurities and the cost of impurity removal during the recycling process.

[0021] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a front view of the advanced de-powdering equipment for retired battery electrodes.

[0023] Figure 2 This is a top view of the advanced de-powdering equipment for retired battery electrodes.

[0024] Figure label:

[0025] 1. Electrode granulator; 11. Feeding and crushing inlet; 12. Discharge outlet; 2. Mechanical mill; 21. Mold cavity; 3. Collector; 31. Feed inlet; 32. Air inlet; 33. Powder outlet; 4. Vibrating screen; 5. Exhaust fan; 6. Support platform. Detailed Implementation

[0026] 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.

[0027] like Figures 1-2 As shown, in one embodiment, a fine powder removal device for retired battery electrodes includes: an electrode granulator 1, a mechanical mill 2, a collector 3, a vibrating screen 4, and an induced draft fan 5 arranged in sequence. The electrode granulator 1 and the mechanical mill 2 are connected by a pipeline, the mechanical mill 2 is connected to the collector 3 by a pipeline, and the collector 3 is connected to the vibrating screen 4 by a pipeline.

[0028] Among them, the electrode granulator 1 and the vibrating screen 4 are located at the bottom of the support platform 6, and the mechanical mill 2 and the collector 3 are located at the top of the support platform 6.

[0029] It should be explained in detail that the main function of the electrode granulator 1 is to crush the initial material into smaller particles to prepare for subsequent secondary grinding. In actual operation, when the material enters the electrode granulator 1, the internal crushing device will crush it powerfully into coarse particles of less than 1cm, which will facilitate further finer crushing.

[0030] Correspondingly, the mechanical mill 2 is used to hold and grind the material after the first crushing. The coarse particles after being crushed by the electrode granulator 1 are transported to the mechanical mill 2 for further grinding, so that the metal impurities and electrode materials can be ground into fine particles of different sizes.

[0031] Correspondingly, the collector 3 is used to collect the material that has been ground twice. The small-diameter particles in the collector 3 will stay temporarily and fall into the vibrating screen 4 in an orderly manner.

[0032] In addition, the vibrating screen 4 is used to screen and separate small-diameter particles of different sizes, so that the materials can be recycled and reused in layers.

[0033] Please continue reading. Figures 1-2In this embodiment, a feeding and crushing port 11 is provided on one side of the electrode granulator 1. This is the inlet for the operator to add the electrode material to be processed into the granulator. In actual operation, the operator only needs to feed the collected retired electrode into this port, and the electrode granulator 1 will start working to crush it. Correspondingly, a discharge port 12 is provided on the other side of the electrode granulator 1. The coarse particles after the first crushing will flow out from this port and enter the subsequent mechanical mill 2 for secondary grinding.

[0034] Please continue reading. Figures 1-2 In this embodiment, a mold cavity 21 is provided in the middle of the mechanical mill 2, so that the crushed coarse particles can be continuously transported to the mold cavity 21 by the blower 5 connected to the collector 3, and ground into fine particles of different sizes by the mill of the mechanical mill 2 (because the metal impurities themselves have a certain degree of ductility, they will become metal particles with a particle size of about 100 μm under mechanical friction, while the particle size of the electrode material will be less than 100 micrometers).

[0035] Specifically, the mold cavity 21 of the mechanical mill 2 is connected to the discharge port 12 of the electrode granulator 1 through a pipeline, and the pipeline connecting the mechanical mill 2 and the electrode granulator 1 is detachably connected through a flange.

[0036] Understandably, during the installation and maintenance of the equipment, operators can easily disassemble and install this pipeline, facilitating separate inspection and debugging of the mechanical mill 2 and the electrode granulator 1; and the flange connection can ensure the tightness of the connection, prevent leakage during material transmission, and ensure that the material can smoothly enter the mechanical mill 2 from the electrode granulator 1.

[0037] Please continue reading. Figures 1-2 In this embodiment, a feed inlet 31 is provided at the bottom of one side of the collector 3, and the feed inlet 31 is connected to the mold cavity 21 of the mechanical mill 2 through a pipeline; correspondingly, an air inlet 32 ​​is provided at the top of the other side of the collector 3, and the air inlet 32 ​​is connected to the blower 5 through a pipeline.

[0038] Understandably, after the mechanical mill 2 completes the secondary grinding of coarse particles, the fine particles will enter the collector 3 through the feed inlet 31 under the action of the induced draft fan 5; the negative pressure airflow generated by the induced draft fan 5 can provide power for the material conveying, so that the material can flow stably and continuously in the pipeline.

[0039] Specifically, the pipeline connecting the collector 3 to the mechanical mill 2 and the induced draft fan 5 is detachably connected via flanges. Understandably, the flange connection not only facilitates assembly and maintenance, but also enables quick on-site operation when the induced draft fan 5 or the mechanical mill 2 needs to be repaired or replaced, reducing equipment downtime and improving production efficiency.

[0040] Please continue reading. Figures 1-2 In this embodiment, the bottom of the collector 3 is provided with a powder outlet 33, and the powder outlet 33 is connected to the vibrating screen 4 through a pipeline. It can be understood that the small-diameter particles collected by the collector 3 can continuously fall into the vibrating screen 4 for screening and sorting.

[0041] Specifically, the pipeline connecting the collector 3 and the vibrating screen 4 is detachably connected via a flexible connector. It is understood that the flexible connector can effectively buffer and absorb the vibrations generated by the vibrating screen 4 during operation, preventing damage to the collector 3 and the connecting pipeline due to vibration transmission.

[0042] Working principle: The material is manually fed into the electrode granulator 1, where the electrode is crushed into coarse particles smaller than 1 cm. Then, under the action of the blower 5 connected to the collector 3, the coarse particles are conveyed into the cavity of the mechanical mill 2, where they are further ground to break down the metal impurities and electrode materials in the coarse particles into fine particles of different sizes. Then, under the action of the blower 5 connected to the collector 3, the particles are collected in the collector 3. Finally, the particles are separated by the vibrating screen 4, so that the material fed into the vibrating screen 4 is metal impurity powder, while the material discharged from the vibrating screen 4 is high-purity electrode powder.

[0043] Through the above technical solution, this application can effectively reduce the content of metal impurities and the cost of impurity removal in the recycling process.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fine dedusting device for decommissioned battery pole pieces, characterized in that, The application relates to a polar sheet granulator. The polar sheet granulator (1), the mechanical mill (2), the collector (3) and the vibrating screen (4) are sequentially connected. The polar sheet granulator (1) is connected with the mechanical mill (2) through a pipeline, and the polar sheet granulator (1) is used for primary crushing of materials. The mechanical mill (2) is connected with the collector (3) through a pipeline, and the mechanical mill (2) is used for secondary crushing of materials. The collector (3) is connected with the vibrating screen (4) through a pipeline, the collector (3) is used for collecting materials, and the vibrating screen (4) is used for screening materials.

2. The retired battery pole piece fine dusting device of claim 1, wherein, The polar sheet granulator (1) and the vibrating screen (4) are arranged at the bottom of the support platform (6), and the mechanical mill (2) and the collector (3) are arranged at the upper portion of the support platform (6).

3. The retired battery pole piece fine dusting device of claim 2, wherein, One side of the polar sheet granulator (1) is provided with a feeding and crushing port (11), and the other side of the polar sheet granulator (1) is provided with a discharging port (12).

4. The retired battery pole piece fine dusting device of claim 1, wherein The mechanical mill (2) is provided with a mold cavity (21) in the middle portion, and the mold cavity (21) of the mechanical mill (2) is connected with the discharging port (12) of the polar sheet granulator (1) through a pipeline.

5. The retired battery pole piece fine dusting device of claim 4, wherein, The pipeline, which is connected with the polar sheet granulator (1), of the mechanical mill (2) is detachably connected through a flange.

6. The retired battery pole piece fine dusting apparatus of claim 1, wherein One side of the collector (3) is provided with a feeding port (31) at the bottom, and the feeding port (31) is connected with the mold cavity (21) of the mechanical mill (2) through a pipeline.

7. The retired battery pole piece fine dusting device of claim 6, wherein, The other side of the collector (3) is provided with an air inlet (32) at the top, and the air inlet (32) is connected with the induced draft fan (5) through a pipeline.

8. The retired battery pole piece fine dusting device of claim 7, wherein, The pipeline, which is connected with the mechanical mill (2) and the induced draft fan (5), of the collector (3) is detachably connected through a flange.

9. The retired battery pole piece fine dusting device of claim 8, wherein, The bottom of the collector (3) is provided with a powder discharging port (33), and the powder discharging port (33) is connected with the vibrating screen (4) through a pipeline.

10. The retired battery pole piece fine dusting device of claim 9, wherein, The pipeline, which is connected with the vibrating screen (4), of the collector (3) is detachably connected through a soft connection.

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