Stirring structure and stirring type slurry energy storage device

Abstract

The invention provides a stirring structure. The stirring structure comprises a cavity, electromagnets, and a magnet, wherein the electromagnets are arranged at both ends of the cavity; the magnet isarranged in the cavity; the energizing and deenergizing of the electromagnets are switched, and the magnet is moved under the magnetic field function of the electromagnets. The stirring structure hasthe advantages that the magnetic field is switched by energizing and deenergizing the electromagnets at the two ends, so that the magnet is moved along different directions, thereby reaching the stirring purpose; the structure is simple, the operation is easy, and the stirring effect is better.

Description

technical field [0001] The invention relates to the technical field of slurry energy storage batteries, in particular to a stirring structure suitable for slurry energy storage batteries and a stirring slurry energy storage device with the stirring structure. Background technique [0002] For the electrode manufacturing of lithium-ion batteries, the positive electrode slurry is composed of binder, conductive agent, positive electrode material, etc.; the negative electrode slurry is composed of binder, graphite carbon powder, etc. Semi-solid flow battery is a new type of battery structure that combines flow battery and lithium-ion battery. The specific energy density and other advantages have attracted the attention of academia and industry. . [0003] In the prior art, in order to prevent the occurrence of dead angle and channeling of the suspension in the reactor, and improve the fluidity and power density of the positive and negative suspensions, semi-solid flow batterie...

AI Technical Summary

Problems solved by technology

However, installing an ultrasonic transmitter on the casing not only has the problem of uneven stirring, but also the ultrasonic wave will have a greater destructive effect on the SEI film of the negative electrode material.

[0005] At the same time, there is a contradiction between the fluidity of the suspension and the solid content of the suspension in the prior art. To increase the overall energy density, the solid content of the electrolyte needs to be increased, but this will deteriorate the fluidity of the electrolyte. If the solid content Lower, not only the energy density is greatly reduced, but also the overall conductance of the electrode is lower, which will cause greater polarization during the reaction process, etc.

Secondly, the stability of the suspension is difficult to guarantee, and it is very easy to form local settlement, blocking the flow channel and diaphragm, which greatly increases the difficulty of equipment design and manufacture

However, if the slurry is completely still during the working process, the electrochemical environment of the active material in different regions of the electrode will be quite different, which will lead to increased polarization of the device and possible dendrite problems.

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