Electrode module for flow battery, preparation method of electrode module and battery stack containing electrode module

Abstract

The invention discloses an electrode module for a flow battery, a preparation method of the electrode module and a battery stack containing the electrode module. The electrode module comprises a positive flow frame, a positive porous electrode, an electrolyte partition plate, a negative flow frame and a negative porous electrode, wherein the positive flow frame, the positive porous electrode, the electrolyte partition plate, the negative flow frame and the negative porous electrode are integrated. With the adoption of the technical scheme disclosed by the invention and the integrated design of the positive flow frame, the positive porous electrode, the electrolyte partition plate, the negative flow frame and the negative porous electrode, contact resistance inside the flow battery is reduced, the porous electrodes are prevented from being excessively compressed, the sealing part of the battery pile is reduced, and the energy efficiency of a flow battery system and the sealing reliability of the battery pile are improved.

Description

technical field [0001] The present invention relates to the technical field of flow batteries, in particular, to an electrode assembly for a flow battery, a preparation method thereof, and a battery stack comprising the same. Background technique [0002] Flow battery is a new type of electrochemical energy storage system. Compared with other energy storage technologies, flow battery has the advantages of large power, large capacity, high energy conversion efficiency, long service life, high safety, and environmental protection. Large-scale energy storage systems supporting photovoltaic power generation and wind power generation, smart grid peak regulation, communication base stations, and distributed power sources have broad application prospects. [0003] Existing liquid flow battery stack structures such as figure 1 As shown, 10' is a bipolar plate, 20' is a positive electrode flow frame, 30' is a positive electrode porous electrode, 40' is an ion exchange membrane, 50' ...

AI Technical Summary

Problems solved by technology

However, compression will reduce the internal porosity of the carbon felt, resulting in increased electrolyte flow resistance and greatly increased system pump loss; The gasket is sealed, which greatly increases the risk of liquid leakage of the battery stack, and is also not conducive to the assembly of the battery stack and its cost reduction

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