Method for balancing electrolyte inlet flow of vanadium battery heaps and device thereof

Abstract

The invention discloses a method for balancing the electrolyte inlet flow of vanadium battery heaps and a device thereof. The method for balancing the electrolyte inlet flow of the vanadium battery heaps comprises the following steps that when the vanadium battery heaps operate, a control system acquires an output signal of a flow meter for monitoring the electrolyte inlet flow of a galvanic pile; the electrolyte inlet flow of the battery heaps is acquired according to the output signal, and whether the electrolyte inlet flow is within a preset electrolyte inlet flow range or not is judged; when the electrolyte inlet flow exceeds the upper limit of the preset electrolyte inlet flow or is under the lower limit of the preset electrolyte inlet flow, the control system controls a proportional control valve to act, so that the electrolyte inlet flow of all the vanadium battery heaps is within the preset electrolyte inlet flow range. The device of the method for balancing the electrolyte inlet flow of the vanadium battery heaps comprises a galvanic pile electrolyte inlet branch pipe, the flow meter, the proportional control valve, a buffer pipe and the control system. The method and the device are applied to an all-vanadium liquid flow battery energy storage system, can improve the consistency of the electrolyte inlet flow of the galvanic pile, ensure the galvanic pile is in the optimum working state, and improve the efficiency of the system.

Description

technical field [0001] The invention relates to a flow equalization method and device, in particular to a flow equalization method and device for a vanadium battery stack inlet liquid. Background technique [0002] At this stage, the control of the inflow flow of vanadium batteries is mainly realized by controlling the flow of the main pipeline through the circulation pump. The applicant found through research that this method cannot guarantee that all stacks can work at the rated inflow flow, especially This is especially true for MW-level vanadium battery systems, because MW-level vanadium battery systems have larger scale, more complex pipelines, more stacks, and the inconsistency of stack flow is more difficult to maintain consistency. The actual situation faced is that the stacks work in different states, which will cause serious polarization problems, thereby reducing the efficiency of the entire system. [0003] Chinese patent document CN 102427140A (patent applicati...

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Problems solved by technology

[0007] Therefore, it is necessary to research and develop a vanadium battery stack liquid flow equalization device to solve the problem of inconsistency in the stack liquid flow

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