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Redox flow battery system and method for operating same

A technology for flow batteries and battery cells, applied in fuel cells, secondary batteries, fuel cell control, etc., can solve problems such as battery discharge capacity decline, battery cell electrodes and other components deterioration, and achieve the effect of suppressing self-discharge

Inactive Publication Date: 2019-08-20
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during shutdown, if the electrolyte remains in the battery cell, self-discharge occurs in the battery cell, and the discharge capacity of the battery decreases accordingly.
In addition, if the electrolyte solution generates heat due to self-discharge, components such as electrodes constituting the battery cell will deteriorate

Method used

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  • Redox flow battery system and method for operating same
  • Redox flow battery system and method for operating same

Examples

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Embodiment Construction

[0017] Hereinafter, an embodiment in which the present invention is applied to a vanadium-based redox flow battery system using vanadium (V) ions as a positive electrode active material and a negative electrode active material will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment, Various changes are possible in the range which does not change the summary of this invention.

[0018]

[0019] figure 1 It is a configuration diagram showing an example of the configuration of the redox flow battery system according to the present embodiment. The redox flow battery system 1 of this embodiment uses the battery cell 2 as the smallest unit, and is used in a form called a battery cell stack in which a battery cell 2 is stacked singly or in multiples, and the electrolyte solution is circulated in the battery cell 2 To perform charging and discharging, the electrolytic solution contains vanadium as an active ...

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Abstract

Provided are: a redox flow battery system in which self-discharge during cessation of operation is suppressed, operation can be easily resumed after cessation of operation, and electric power can be extracted or stored even when circulation of an electrolytic solution is ceased; and a method for operating the same. In the redox flow battery system: a battery cell 2 and electrolytic solution tanks14 are disposed to be substantially horizontal to one another; outgoing pipes 15 are disposed so as to connect the bottom portion of the battery cell 2 with the bottom portions of the electrolytic solution tanks 14; return pipes 16 are disposed so as to connect the upper portion of the battery cell 2 with the upper portions of the electrolytic solution tanks 14; and electrolytic solution recoveryroutes 20 disposed so as to connect the outgoing pipes 15 to the upper portions of the electrolytic solution tanks 14. The redox flow battery system is further provided with second liquid feeding pumps 21 for recovering electrolytic solutions through the electrolytic solution recovery routes 20, and second opening / closing means 22 provided to the electrolytic solution recovery routes 20.

Description

technical field [0001] The present invention relates to redox flow battery systems and methods of operation thereof. Background technique [0002] Various batteries are under development as batteries for power storage, and there are electrolyte flow batteries and so-called redox flow batteries. The redox flow battery system circulates the cathode electrolyte and the anode electrolyte from the cathode electrolyte tank and the anode electrolyte tank respectively to the battery cell with the cathode, the anode and the separator between the two electrodes through the pump, through the power conversion devices (such as AC / DC converters, etc.) for charging and discharging. [0003] On the other hand, in the redox flow battery system, the operation may be stopped due to maintenance or the like. However, if the electrolytic solution remains in the battery cell during shutdown, self-discharge occurs in the battery cell, and the discharge capacity of the battery decreases accordingl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/04276H01M8/04298
CPCH01M8/04186H01M8/188Y02E60/10Y02E60/50H01M8/04276H01M8/18H01M10/0585H01M10/0587
Inventor 富田美由纪
Owner SHOWA DENKO KK
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