Ball-milling wet-process mixing equipment for producing lithium battery negative electrode material precursor

Abstract

The invention discloses a ball-milling wet-process mixing device for producing a lithium battery negative electrode material precursor. The device comprises a supporting bottom plate, a roller mechanism is arranged on the supporting bottom plate, the roller mechanism is a double-layer cylinder structure, two ends of the roller mechanism are rotatably connected with a connecting frame, the end part of the connecting frame is fixedly provided with an electromagnet, the electromagnet is located over the roller mechanism, a controller is fixedly installed on the side face of the supporting plate, and the controller controls the electromagnet to intermittently supply power. According to the ball-milling wet-process material mixing device for producing the lithium battery negative electrode material precursor, the electromagnet is intermittently electrified and is magnetically connected with the fixed magnet, so that an inner sliding block is driven to slide in the inner cavity, meanwhile, the inner barrel body in the outer barrel body is subjected to high-frequency vibration under the action of a vibration spring, thus the steel balls efficiently collide with the graphite material in the outer barrel, the shape of the material is quickly trimmed, and the material is uniformly mixed.

Description

technical field [0001] The invention relates to the technical field of production of lithium battery negative electrode material precursors, in particular to a ball mill wet mixing equipment used for the production of lithium battery negative electrode material precursors. Background technique [0002] As we all know, the commercial graphite electrode commonly used recently has only a theoretical capacity of 372mAhg-I, which has certain restrictions on the energy output of lithium batteries. As a negative electrode material that may replace graphite, transition metal oxides have high theoretical capacity and relatively low capacity. However, the transition metal oxide anode material needs to overcome its own defects before large-scale application, which will cause large volume expansion and particle agglomeration during the charge and discharge process, which will lead to electronic conductivity of the electrode material during the charge and discharge cycle. Based on the ad...

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Problems solved by technology

[0003] However, there are certain problems in the existing mixing equipment. Most of the existing mixing equipment is mixed by magnetic stirring and mixing. In this way, the mixing between the material and the liquid is easy to produce a large amount of agglomeration, and the agglomeration is easy to adhere to the mixing material. The inner wall of the equipment is difficult to remove. At the same time, ball milling wet mixing is widely used in the prior art. In this way, it is difficult for the steel balls to reach the highest point inside the cylinder due to centrifugal force and gravity when rotating at low speed. , resulting in a low impact and grinding effect of the steel ball on the material, so that the agglomeration generated by the mixing of the material and the liquid will also adhere to the inner surface of the inner cylinder. We propose a lithium battery negative electrode material precursor Ball mill wet mixing equipment for body production

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