Liquid flow frame of all-vanadium redox flow battery

Abstract

The invention discloses a liquid flow frame of an all-vanadium redox flow battery. The liquid flow frame comprises a hollow frame body, the frame body is symmetrically provided with a liquid inlet flow channel and a liquid outlet flow channel, and the liquid inlet flow channel comprises a liquid inlet main flow channel body, a liquid inlet first-grade buffer flow channel body, a liquid inlet first-grade branch flow channel body, a liquid inlet second-grade branch flow channel body and a liquid inlet second-grade branch flow channel body which are communicated in sequence; the liquid outlet flow channel comprises a liquid outlet main flow channel body, a liquid outlet first-grade buffer flow channel body, a liquid outlet first-grade branch flow channel body, a liquid outlet second-grade branch flow channel body and a liquid outlet second-grade branch flow channel body which are communicated in sequence; the liquid inlet first-grade branch flow channel body and the liquid outlet first-grade branch flow channel body are both evenly provided with multiple parallelogram protrusions for forming inclined electrolyte flow channels, and the liquid inlet second-grade branch flow channel bodyand the liquid outlet second-grade branch flow channel body are both evenly provided with rectangular protrusions for forming electrolyte flow channels. An electrolyte can be more evenly and uniformly distributed in the middle of the liquid flow frame, which helps to improve the energy efficiency of the vanadium battery and the current efficiency.

Description

technical field [0001] The invention belongs to the technical field of liquid flow energy storage, and in particular relates to a flow frame of a flow battery. Background technique [0002] The all-vanadium redox flow battery energy storage system is a technology for large-scale energy storage. After decades of development in my country, the all-vanadium redox flow battery has achieved a lot of results. The electrolyte is stored in different positive and negative liquid storage tanks, which has the advantages of easy reduction treatment, flexible design of output power and battery capacity, long service life, etc., and has little pollution to the environment, high safety, and good economy. Therefore, it has broad application prospects in power grid peak shaving and valley filling, smart grid construction, etc. [0003] The all-vanadium redox flow battery is composed of a positive electrode liquid storage tank, a negative electrode liquid storage tank, an electric pump, a po...

AI Technical Summary

Problems solved by technology

Once the electrolyte is distributed unevenly, it will greatly reduce the unit current density of the electrode, cause different degrees of concentration polarization, cause the local temperature of the stack to be too high, and even burn out, shortening the service life of the battery

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