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Lithium battery slurry defoaming and grinding method and device

A grinding device, lithium battery technology, applied in chemical instruments and methods, mixers with rotary stirring devices, transportation and packaging, etc., can solve problems such as poor surface density consistency, unfavorable coating, coating cracks, etc. , to ensure coating quality and control of areal density fluctuations, improve processing efficiency and quality, and eliminate agglomeration or agglomeration

Inactive Publication Date: 2020-05-01
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slurry crushing and grinding device mentioned above can only grind the slurry, but cannot achieve the effects of stirring and exhausting
[0005] Viscosity is an important performance index of lithium battery slurry. If the viscosity is too high or too low, it is not conducive to the coating of the pole piece. The slurry with high viscosity is not easy to settle and the dispersibility will be better, but the viscosity is too high to achieve fluidity. The flat effect is not conducive to coating; when the viscosity is too low, although the fluidity of the slurry is good, it is difficult to dry, which reduces the drying efficiency of the coating, and also causes coating cracks, slurry particle agglomeration, and inconsistent surface density. Waiting for a question

Method used

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  • Lithium battery slurry defoaming and grinding method and device
  • Lithium battery slurry defoaming and grinding method and device
  • Lithium battery slurry defoaming and grinding method and device

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Embodiment Construction

[0032] The embodiments of the present invention will be described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right" , "Vertical", "horizontal", "top", "bottom", "inner", "outer" and other directions or positional relations are based on the positions or positional relations shown in the drawings, and are only for the convenience of description The embodiments of the invention and the simplified description do not indicate or imply that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present inv...

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Abstract

The invention relates to the technical field of lithium battery production, and provides a lithium battery slurry defoaming and grinding method and device. The lithium battery slurry defoaming and grinding device comprises a tank body and a cover body, wherein an accommodating cavity for storing lithium battery slurry is formed in the tank body; the cover body is arranged at the open end of the tank body in a sealing and covering manner; a vacuumizing opening and a stirring and grinding mechanism are arranged on the cover body; the vacuumizing opening is communicated with the accommodating cavity; and the stirring and grinding mechanism extends into the accommodating cavity and is used for stirring and grinding the lithium battery slurry in the accommodating cavity. The lithium battery slurry defoaming and grinding method comprises the following steps: vacuumizing the accommodating cavity filled with the lithium battery slurry in real time through the vacuumizing opening; stirring andgrinding the lithium battery slurry in the accommodating cavity through the stirring and grinding mechanism. According to the embodiment of the invention, the lithium battery slurry is defoamed and ground simultaneously.

Description

Technical field [0001] The invention relates to the technical field of lithium battery production, in particular to a method and device for defoaming and grinding lithium battery slurry. Background technique [0002] With the development of new energy vehicles, the requirements for lithium-ion power batteries are getting higher and higher, and the requirements for the production process of lithium batteries are also getting higher and higher. In the production process of lithium batteries, the effective active material needs to be stirred and mixed by a battery slurry mixer to form a battery slurry, and then uniformly coated on the metal foil. In the process of slurry mixing, agglomeration will occur. Although the slurry is dispersed, broken and filtered, there will be tiny agglomerations or agglomerations in the slurry. The agglomeration of the slurry will cause the filter element life to be reduced during the filtration process, and the slurry will When the coating head is ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/00B02C23/00B01F7/18B01F7/24
CPCB02C19/0056B02C23/00B01F27/92B01F27/90
Inventor 李昂高士强赵挺苏子龙蒲刚刚阳凯
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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