Lithium-sulfur battery energy storage system in the form of liquid flow

Abstract

The invention discloses and provides a lithium-sulfur battery energy storage system in the form of a liquid flow that is safe, efficient, fast, and has high capacity and stable circulation. The lithium-sulfur battery energy storage system includes an external containment vessel, a positive electrode and a negative electrode disposed on the upper end of the external containment vessel, a positive and negative separator drive system disposed inside the external containment vessel, and a positive battery fluid circulation cooling system. system and a negative electrode battery liquid circulation cooling system, the positive electrode battery liquid circulation cooling system includes a positive electrode liquid storage tank, a positive electrode plate heat exchanger communicated with the positive electrode liquid storage tank through the positive electrode circulation pipeline, and the positive electrode liquid storage tank is provided with There is a positive electrode liquid flow that disperses the positive electrode active material in the electrolyte, and the negative electrode battery fluid circulation cooling system includes a negative electrode liquid storage tank, a negative electrode plate heat exchanger communicated with the negative electrode liquid storage tank through a negative electrode circulation pipeline, and the The negative electrode liquid storage tank is provided with a negative electrode liquid flow that disperses the negative electrode active material in the electrolyte, and realizes the reaction charging and discharging process of lithium ions and sulfur ions in the form of liquid flow.

Description

technical field [0001] The invention relates to a lithium-sulfur battery energy storage system in the form of liquid flow. Background technique [0002] Batteries are used in everything from electric vehicles and handheld devices to microchips. With the advancement of society and technology, people's lifestyles have put forward higher requirements on battery performance, and researchers from all over the world have been working on developing better chemical power sources. Lithium secondary battery is a green power source developed in the 1990s. It is favored because of its excellent performance such as high reversible capacity, high voltage, high cycle performance and high energy density. It is called the leading power source in the 21st century. [0003] Lithium-sulfur battery is one of the secondary battery systems under development with the highest energy density. Especially in recent years, it has become more and more popular due to its incomparable high specific capaci...

AI Technical Summary

Problems solved by technology

However, there are also some problems in lithium-sulfur batteries that hinder its development, such as: the conductivity of sulfur is low, and the lithium polysulfide intermediate product produced during charging and discharging is easily soluble in the organic electrolyte, which causes the loss of the positive active material and precipitates in the lithium-sulfur battery. The polysulfides on the surface of the negative electrode can aggravate the corrosion of the negative electrode and increase the internal resistance of the negative electrode, eventually leading to an irreversible decline in battery capacity.

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