Novel filtering and defoaming slurry storage device for light-weight battery positive electrode slurry

Abstract

The utility model discloses a novel light-weight battery positive electrode slurry filtering, defoaming and storing device, which belongs to the technical field of lithium batteries and comprises a barrel body, an upper cover body is detachably mounted at the top end of the barrel body, a vacuum extraction opening is formed in the upper cover body, a threaded connector is arranged at the top end of the upper cover body, and a charging barrel is detachably connected to the threaded connector. A filter screen is detachably mounted in the charging barrel, a vacuum pump is arranged at the bottom end of the barrel body, and the vacuum pump is connected with the vacuum extraction opening; an ultrasonic generation rod is arranged at the bottom end in the barrel body. Required slurry is contained in the charging barrel, then the charging barrel is in butt joint with the threaded connector of the barrel body, rapid filtering and vacuum defoaming are carried out on the slurry through the vacuum pump, then ultrasonic dispersion equipment is used, and various effects caused by the cavitation effect generated by ultrasonic waves in a solvent are utilized. And the sizing material is dispersed and crushed through the resonance effect generated by various components in a suspension system, so that the agglomeration trend of the sizing material is fully inhibited to reduce the viscosity of the sizing material, and the viscosity is kept at the same level.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a novel lightweight battery positive electrode slurry filtering, defoaming and slurry storage device. Background Art

[0002] With the development of modern electronic technology and the continuous improvement of the requirements for battery performance in the energy storage industry, many new materials need to be fully verified in the laboratory. However, experimental materials often have various different characteristics. In the slurry preparation process during the manufacture of lithium batteries, it is a process of uniformly dispersing the positive and negative active material powders, conductive agent powders, polymer binders and additives in a solvent to form a stable suspension. This suspension is called slurry in the lithium-ion battery industry. And this slurry preparation link is crucial for the smooth progress of all subsequent steps and is the most important one.

[0003] Due to the relationship of the inter-particle force in the positive electrode slurry, it is easy to spontaneously agglomerate and then settle, resulting in a sharp increase in viscosity. And the large particles generated during the slurry preparation process will also affect the progress of the subsequent coating process. Therefore, a filtering device is needed to filter large particles. For example, a lithium battery slurry filter with the publication number CN 220424712 U can filter the slurry and prevent sedimentation.

[0004] However, in the soft-pack experiment link, large feeding devices are not used to stabilize the performance. Because for small-batch soft-pack experiments mainly for material verification, using large feeding devices is not only troublesome to clean but also inconvenient to carry, resulting in manual filtration and multiple discharges each time. And for small-batch soft-pack experiments mainly for material verification, the used equipment does not have solutions for the rapid sedimentation of suspension particles, the agglomerated large particles and bubbles in the slurry. During the coating process, it is necessary to take materials multiple times, and the slurry after taking materials will gradually settle over time, resulting in too rapid an increase in viscosity and incorrect calculation of the equipment parameters required to pursue the surface density that meets the process. Content of the Utility Model

[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a novel lightweight battery positive electrode slurry filtering, defoaming and slurry storage device, which can still have all the functions required during the slurry transfer process under the condition of lightweight and miniaturization of the device, so that the slurry can be coated under a low viscosity that is convenient for coating.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A novel lightweight battery cathode paste filtration, defoaming and paste storage device provided by the utility model includes a barrel body. A top cover body is detachably installed at the top end of the barrel body. The top cover body is provided with a vacuum pumping port. A threaded interface is provided at the top end of the top cover body. A loading barrel is detachably connected to the threaded interface. The loading barrel is communicated with the barrel body. A filter screen is detachably installed in the loading barrel. A vacuum pump is provided at the bottom end of the barrel body. The vacuum pump is connected to the vacuum pumping port. An ultrasonic generating rod is provided at the bottom end inside the barrel body. A sealing cover is also included, and the sealing cover can be connected to the threaded interface.

[0008] Preferably, a technical solution of the utility model lies in that an ultrasonic generating base is provided at the bottom end of the barrel body for controlling the start and stop of the ultrasonic generating rod.

[0009] Preferably, a technical solution of the utility model lies in that a controller is provided at the bottom end of the barrel body. The controller includes a knob with adjustable power, and the knob is connected to the vacuum pump and the ultrasonic generating base.

[0010] Preferably, a technical solution of the utility model lies in that the top cover body is threadedly connected to the barrel body.

[0011] Preferably, a technical solution of the utility model lies in that the filter screen is selected to be 100-300 mesh.

[0012] The beneficial effects of the utility model are as follows:

[0013] A novel lightweight battery cathode paste filtration, defoaming and paste storage device provided by the utility model uses the loading barrel to hold the required paste, then docks it on the threaded interface of the barrel body, quickly filters and vacuum defoams it through the vacuum pump, and then uses an ultrasonic dispersion device to utilize various effects caused by cavitation in the solvent by ultrasonic waves, as well as resonance effects generated by various components in the suspension system to disperse and crush the rubber compound, fully suppressing the agglomeration trend of the paste to reduce the paste viscosity and keep it at the same level, providing help for the subsequent coating work. And this device is especially suitable for small-batch material verification soft-pack experiments due to its miniaturized and lightweight characteristics. Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of the paste storage device;

[0015] Figure 2 is the structural schematic diagram of the bottom of the barrel body of the paste storage device;

[0016] In the figure:

[0017] 1. Barrel body; 2. Upper cover body; 3. Vacuum pumping port; 4. Threaded interface; 5. Loading bucket; 6. Filter screen; 7. Vacuum pump; 8. Ultrasonic generating rod; 9. Ultrasonic generating base; 10. Controller; 11. Knob. Detailed implementation manner

[0018] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0019] As shown in the figure, this embodiment provides a novel lightweight battery cathode slurry filtering, defoaming and slurry storage device, including a barrel body 1. The top of the barrel body 1 is detachably installed with an upper cover body 2. The upper cover body 2 is provided with a vacuum pumping port 3. The top of the upper cover body 2 is provided with a threaded interface 4. A loading bucket 5 is detachably connected to the threaded interface 4. The loading bucket 5 is communicated with the barrel body 1. A filter screen 6 is detachably installed in the loading bucket 5. A filter screen 6 with a mesh size of 100-300 meshes can be selected to filter and collect the slurry again, filtering out large particles in the slurry. The bottom end of the barrel body 1 is provided with a vacuum pump 7. The vacuum pump 7 is connected to the vacuum pumping port 3; An ultrasonic generating rod 8 is provided at the bottom end inside the barrel body 1; It also includes a sealing cover, and the sealing cover can be connected to the threaded interface 4.

[0020] Specifically, use the loading bucket 5 to take the slurry required for the soft-pack experiment, then dock it with the threaded interface 4, and then start the vacuum pump 7 to continuously pump vacuum at the vacuum pumping port 3 to form a negative pressure inside the barrel body 1. Then, the slurry in the loading bucket 5 is pushed downward by the atmospheric pressure to pass through the filter screen 6 for rapid filtration. After the slurry is completely filtered, remove the loading bucket 5 and replace it with a sealing cover and tighten it. At the same time, pump vacuum to remove bubbles from the slurry, and synchronously turn on the ultrasonic generating rod 8 to disperse the slurry, weakening the interaction energy between nanoparticles to reduce aggregation, so that its viscosity is always maintained within a certain range.

[0021] Among them, an ultrasonic generating base 9 is provided at the bottom end of the barrel body 1 for controlling the start and stop of the ultrasonic generating rod 8.

[0022] Among them, a controller 10 is provided at the bottom end of the barrel body 1. The controller 10 includes a knob 11 with adjustable power. The knob 11 is connected to the vacuum pump 7 and the ultrasonic generating base 9. The knob 11 can adjust the ultrasonic and vacuum intensities to prevent overheating and dispersion.

[0023] Among them, the upper cover body 2 is threadedly connected to the barrel body 1. The upper cover body 2 can be screwed out threadedly to open the upper cover body 2 to take materials from the barrel body 1.

[0024] The present utility model is described by way of preferred embodiments. Those skilled in the art will appreciate that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. The present utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application all belong to the scope of protection of the present utility model.

Claims

1. A novel lightweight battery cathode slurry filtration, defoaming and slurry storage device, characterized in that: It includes a barrel body (1), a top cover body (2) is detachably installed at the top of the barrel body (1), a vacuum extraction port (3) is provided on the top cover body (2), a threaded interface (4) is provided at the top of the top cover body (2), and a charging barrel (5) is detachably connected to the threaded interface (4). The charging barrel (5) communicates with the barrel body (1), a filter screen (6) is detachably installed in the charging barrel (5), a vacuum pump (7) is provided at the bottom end of the barrel body (1), and the vacuum pump (7) is connected to the vacuum extraction port (3); An ultrasonic generating rod (8) is provided at the bottom end inside the barrel body (1); It further includes a sealing cover, and the sealing cover can be connected to the threaded interface (4).

2. The novel lightweight battery cathode slurry filtration, defoaming and slurry storage device according to claim 1, characterized in that: An ultrasonic generating base (9) is provided at the bottom end of the barrel body (1) for controlling the start and stop of the ultrasonic generating rod (8).

3. The novel lightweight battery cathode slurry filtration, defoaming and slurry storage device according to claim 2, characterized in that: A controller (10) is provided at the bottom end of the barrel body (1), the controller (10) includes a knob (11) with adjustable power, and the knob (11) is connected to the vacuum pump (7) and the ultrasonic generating base (9).

4. The novel lightweight battery cathode slurry filtration, defoaming and slurry storage device according to claim 3, characterized in that: The top cover body (2) is threadedly connected to the barrel body (1).

5. The novel lightweight battery cathode slurry filtration, defoaming and slurry storage device according to claim 1, characterized in that: The filter screen is selected to be 100 - 300 meshes.

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