Redox flow battery system and method for operating redox flow battery
AssigneeSumitomo Electric Industries, Ltd.
InventorTakefumi Ito
Life of this patent
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Abstract
A redox flow battery system includes a battery cell that performs charge-discharge by supplying an electrolyte; a monitor cell to which the electrolyte is supplied; a voltmeter that measures an open circuit voltage of the monitor cell; a thermometer that measures a liquid temperature of the electrolyte; and a controller that controls the charge-discharge of the battery cell based on the open circuit voltage, and the controller corrects the open circuit voltage in accordance with the liquid temperature.
Claims5
A redox flow battery system comprising:
- a battery cell that performs charge-discharge by supplying an electrolyte;
- a monitor cell to which the electrolyte is supplied;
- a voltmeter that measures an open circuit voltage of the monitor cell;
- a thermometer that measures a liquid temperature of the electrolyte;
- and
- a controller that controls the charge-discharge of the battery cell based on the open circuit voltage,
- wherein the electrolyte comprises an active material ion, and
- wherein the controller is configured to correct the open circuit voltage in accordance with the liquid temperature, wherein the controller is configured to correct the open circuit voltage by:
- calculating a temperature difference between the liquid temperature and a reference temperature;
- calculating a change amount of a reference potential with respect to the open circuit voltage at the reference temperature using a potential temperature coefficient of the active material ion and the temperature difference;
- and
- correcting the open circuit voltage by adding the change amount of the reference potential to the open circuit voltage.
A redox flow battery operation method for performing charge-discharge by supplying an electrolyte comprising an active material ion to a battery cell, the method comprising:
- measuring an open circuit voltage of a monitor cell to which the electrolyte is supplied;
- measuring a liquid temperature of the electrolyte;
- correcting the open circuit voltage in accordance with the liquid temperature;
- and
- performing the charge-discharge of the battery cell based on the corrected open circuit voltage,
- wherein correcting the open circuit voltage comprises the steps of:
- calculating a temperature difference between the liquid temperature and a reference temperature;
- calculating a change amount of a reference potential with respect to the open circuit voltage at the reference temperature using a potential temperature coefficient of the active material ion and the temperature difference;
- and
- correcting the open circuit voltage by adding the change amount of the reference potential to the open circuit voltage.
Dependencies are inferred from the claim text.