Method for thoroughly solving liquid leakage of vanadium cell stack

Abstract

The invention discloses a method for thoroughly solving the problem of liquid leakage of a vanadium cell stack and belongs to the technical field of vanadium cell stacks. According to the method, an end pressing plate is included. According to the invention, a magnetic drive pump is added at a galvanic pile liquid outlet; an electrolyte in the galvanic pile is subjected to suction force from the galvanic pile liquid outlet such that the electrolyte flows out from the galvanic pile liquid outlet, and the possibility of galvanic pile liquid leakage caused by the fact that part of the electrolyteflows out from other unsealed places of a galvanic pile due to the pressure from a liquid inlet pump is avoided. Meanwhile, after the pump is additionally arranged, the flow speed of the electrolyteis higher, the concentration difference activation of the battery reaction is reduced, and the battery efficiency is improved. Meanwhile, due to the fact that one pump is additionally arranged, equivalently, one standby pump is additionally arranged, it can be guaranteed that a cell can still operate normally after one pump is stopped, the possibility that the galvanic pile is overcharged due to the fact that the pump is stopped is reduced, the problems in the background technology can be effectively solved, and the method is suitable for being widely used and popularized.

Description

Technical field [0001] The invention relates to the technical field of vanadium battery stacks, in particular to a method for thoroughly solving the leakage of vanadium battery stacks. Background technique [0002] The all-vanadium flow battery is composed of a stack, a vanadium electrolyte storage tank, a circulating pump, pipelines, charging and discharging modules. The stack is composed of single cells in series. The monolithic battery is composed of ion exchange membrane, electrode, conductive plate, liquid flow frame plate and sealing ring. The electrode is made of graphite felt, installed in the flow frame plate, located between the ion exchange membrane and the conductive plate. The lower and upper parts of the liquid flow frame plate are respectively provided with vanadium electrolyte inlet and outlet branch channels. Under the pressure of the circulating pump, the vanadium electrolyte in the storage tank flows into the stack through the main flow channel of the liquid...

AI Technical Summary

Problems solved by technology

[0003] In the past, many people used various materials to seal the vanadium battery stack, and tried a variety of stack structures to prevent electrolyte leakage, but the results were not satisfactory.

Images