Slurry mixer for battery electrode

Abstract

According to the present invention, provided is a slurry mixer for a battery electrode which allows an agitator to separately have a high-speed agitator and a low-speed agitator to input a mixed material at the same time so as to uniformly disperse and mix the same, and allows the configuration of the high-speed agitator to be maximally simplified to minimize a rotating load so as to be able to set a high-speed rotation of an electric motor, thereby improving the productivity by greatly shortening an agitation time of slurry. The slurry mixer for the battery electrode of the present inventioncomprises: a container for accommodating a mixed material consisting of a liquid material and a powdery material, and having a bottom portion formed with an inclined bottom surface and a side wall portion formed with an inner circumferential surface erected from an edge portion of the inclined bottom surface; a high-speed agitator for flowing and agitating the mixed material, and having an inclined cylindrical portion, a plurality of radially-arranged agitating pieces, a rotating plate having agitating grooves alternately arranged, and a plurality of agitating rods fixed to the agitating pieces of the rotating plate; a high-speed electric motor for rotating the high-speed agitator; a low-speed agitator having a blade surface for separating the mixed material attached onto the inner circumferential surface of the container therefrom and a swirling surface for moving the mixed material located at an edge portion in the container to the center; and a low-speed electric motor for rotatingthe low-speed agitator.

Description

technical field [0001] The present invention relates to a slurry mixer for battery electrodes, and more specifically relates to a slurry mixer for battery electrodes capable of dispersing and uniformly mixing materials when manufacturing slurry used to form battery electrodes. Background technique [0002] Recently, for batteries that can be used continuously by recharging, solutions to environmental pollution are being proposed to actively respond to the saving of fossil fuels and the reuse of renewable energy, and the power of portable electronic devices such as mobile phones and notebook computers is widely used. Secondary batteries, particularly for electric vehicles, are being actively developed, and thus the production volume of secondary batteries is being greatly increased. [0003] In the method of manufacturing the secondary battery, the electrode is formed by the coating method by applying an electrode slurry composed of an electrode active material, a conductive ...

AI Technical Summary

Problems solved by technology

[0010] However, the mixer impeller of the above-mentioned prior art forms a multi-layer structure, so not only the structure is complicated, but also a plurality of impellers are fixed and rotated together on a single drive shaft, so when the mixed material is stirred, the shaft used to rotate the drive shaft The rotation load of the motor plays a big role, where the impeller moves the mixed material up and down while dispersing and performing the work of uniform mixing

Therefore, it is difficult to set the rotation speed of the motor at a high speed, and there is a limitation in shortening the slurry stirring time, and there is a disadvantage that the output cannot be greatly increased

[0011] In addition, the disadvantages of the prior art are as follows: the structure and shape of the impeller are fixed, so the rotational load acting on the motor varies according to the particle size or specific gravity of the mixed material, and the rotational load acting on the motor varies depending on the mixing ratio of the mixed material. The rotating load of the motor, so it cannot be kept in optimum condition

Therefore, the higher the rotation load, the greater the load on the motor, which shortens the life and prolongs the stirring time. On the contrary, the lower the rotation load, the lower the stirring efficiency.

Images