A voltage equalization control method for an all-vanadium redox flow battery energy storage module device

Abstract

The present invention relates to a voltage equalization control method for an all-vanadium redox flow battery energy storage module device, comprising at least an external controller, wherein the external controller is programmed to perform at least the following steps: the external controller uses The temperature measuring device of the battery energy storage device itself determines in real time the temperature of the electrolyte on at least one side of the positive and negative reaction areas of the battery; the control device judges the external environment temperature of the energy storage device in real time by means of the temperature measuring device of the controller itself; The control device will judge the power load of the system in combination with the real-time current and / or voltage value; the control device will determine the real-time power generation of the system according to the above steps and calculate the heat production of the system in the same period, and the external control device will calculate the power consumption of the system according to the heat production. Under normal conditions, the energy storage device implements rotation-type heat exchange regulation, and on the basis of planning heat management in advance and using a negative feedback mechanism to adjust the temperature, refer to the nonlinear relationship between heat and power to establish the appropriate power under corresponding working conditions.

Description

Technical field [0001] The present invention relates to the field of flow battery technology, in particular to a voltage balancing control method for a full vanadium flow battery energy storage module device. Background [0002] The all-vanadium flow battery is a kind of redox battery with vanadium as the active substance in a dynamic circulating flow. Vanadium battery electrical energy in the form of chemical energy stored in different valence vanadium ions sulfuric acid electrolyte, through the external pump electrolytic hydraulic pressure into the battery reactor, under the action of mechanical force, so that it in different reservoirs and half-battery closed loop circulation flow, the use of proton exchange membrane as the separator of the battery pack, electrolyte solution parallel flow through the electrode surface and electrochemical reaction occurs, through the two electrode plate collection and conduction of current, so that the chemical energy stored in the solution int...

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Problems solved by technology

[0006] 1. Although this method realizes the control of the electrolyte temperature and simple heat recovery, the heat utilization method is single;

[0007] 2. There is no targeted temperature adjustment and control based on the actual operating conditions and operating environment during the charging and discharging phase of the battery, which may cause unnecessary adjustment processes and more waste of resources;

[0008] 3. In some special regions or environmental conditions with large temperature differences, there is no corresponding adjustment to the power according to the heat change in the reaction process of the energy storage battery system to meet the appropriate power demand under each working condition

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