Flow battery

Abstract

The invention relates to a flow battery. The flow frame boards of the flow battery are provided with liquid inlet holes and liquid outlet holes; the front surfaces of the flow frame boards are provided with liquid inlet branch flow channels and liquid outlet branch flow channels; one end of each liquid inlet branch flow channel is communicated with the liquid inlet holes, and the other end thereof is communicated with the inner frames of the flow frame boards; one end of each liquid outlet branch flow channel is communicated with the liquid outlet holes, and the other end thereof is communicated with the inner frames of the flow frame boards; the flow frame boards are alternately arranged according to a mode of front surface to front surface and back surface to back surface in sequence; an ion exchange film is clamped between the opposite front surfaces of the adjacent flow frame boards; a current-conducting plate is clamped between the opposite back surfaces of the adjacent flow frame boards; the edge of the inner frame of each flow frame board is provided with an annular chamfer; the current-conducting plate is arranged on the annular chamfer; and electrodes are arranged in the inner frames of the flow frame boards. The flow battery has fewer components, simple and compact structure, easy processing, convenient assembly, small thickness, small volume, small internal resistance, good transfer and diffusion effect of electrolyte, small self discharge current, big power density, high energy efficiency and low cost and can realize big-power and large-scale application.

Description

technical field [0001] The invention belongs to the field of flow batteries, and in particular relates to an all-vanadium flow battery. Background technique [0002] The flow battery, represented by the all-vanadium flow battery, performs electrochemical reactions on the electrodes through the electrolyte of different valence states, thereby realizing the mutual conversion of chemical energy and electrical energy. The flow battery is the largest and most advanced technology in the world today. , High-efficiency reversible fuel cells closest to industrialization, with unique advantages such as large power, large capacity, high efficiency, low cost, long life, green environmental protection, etc., in photovoltaic power generation, wind power generation, distributed power stations, power grid peak regulation, communication base stations UPS power supply, transportation, municipal power, military power storage and other broad fields have extremely good application prospects, and...

AI Technical Summary

Problems solved by technology

[0003] Existing flow batteries are usually composed of ion exchange membranes, flow field plates, diversion nets, turbulence nets, electrodes, conductive plates, etc., which have many components, complex and uncompact structures, difficult processing, inconvenient assembly, large thickness, and large volume. , large internal resistance, unsatisfactory electrolyte transmission and diffusion effect, large self-discharge current, low power density, low energy efficiency, high cost and other defects, it is difficult to achieve high power and cannot be applied on a large scale

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