Method and device for measuring charge state of all-vanadium redox flow battery in real time
A technology of all-vanadium redox flow battery and state of charge, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., which can solve the problems of failure to meet the working conditions, slow electrochemical analysis speed of electrolyte, and accuracy of terminal voltage estimation method Low-level problems, to achieve the effect of easy control, fast measurement speed and high precision
Inactive Publication Date: 2012-07-04
SANY ELECTRIC CO LTD
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Problems solved by technology
However, in some application environments, such as adjusting the power generation power of a power plant or the load of the grid, it is required to respond quickly and accurately to the measurement of the battery state of charge data, and the equipment is not allowed to shut down, while the electrochemical analysis of the electrolyte is slow. , The accuracy of the terminal voltage estimation method is low, and the measurement of the open circuit voltage requires the battery to stop working, which cannot meet the requirements of the working conditions
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[0020] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with the examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.
[0021] The method for measuring the state of charge of an all-vanadium redox flow battery in real time provided by the present invention comprises the following steps:
[0022] Step a) Insert similar reference electrodes into the positive liquid storage tank and the negative liquid storage tank of the all-vanadium redox flow battery respectively, and it is required not to affect the sealing of the positive and negative liquid storage tanks. The reference electrode is an electrode used as a reference comparison when measuring various electrode potentials. The electrode to be measured and the reference electrode whose poten...
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The invention provides a method for measuring a charge state of an all-vanadium redox flow battery in real time, which comprises the following steps of: a) placing a homogeneous reference electrode into an anode liquid storage tank and a cathode liquid storage tank of the all-vanadium redox flow battery respectively; b) measuring an electromotive force E of the all-vanadium redox flow battery; and c) calculating SOC of the battery by using the following formula, wherein the formula is omitted. The method for measuring the charge state of the all-vanadium redox flow battery in real time can perform real-time measurement on line, has high measurement speed and high precision, can be performed under any condition, does not affect the work of the battery, and is convenient for controlling charge and discharge of the battery in real time.
Description
technical field [0001] The invention relates to an all-vanadium redox flow battery, and specifically designs a method and a device for real-time measuring the state of charge of the all-vanadium redox flow battery. Background technique [0002] With the continuous application of new power generation methods, the application of various large-capacity energy storage devices is also increasing. Flow batteries have been widely used due to their good storage performance, high discharge depth, long service life, and ability to meet the requirements of charging and discharging with large currents. [0003] The commonly used flow battery is an all-vanadium flow battery, and its electrolyte is an acidic solution containing vanadium. The storage or release of electric energy is realized through redox reactions of vanadium ions with different valences. Please refer to figure 1 , figure 1 Schematic diagram of the structure of an all-vanadium redox flow battery. The battery body and ...
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IPC IPC(8): G01R31/36
Inventor 葛菲叶坚强
Owner SANY ELECTRIC CO LTD