Method and system for evaluating redox flow battery

A liquid flow battery and oxidation value technology, applied in fuel cells, fuel cell additives, regenerative fuel cells, etc., can solve problems such as redox flow battery capacity attenuation

Inactive Publication Date: 2015-08-12
OCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It is an object of the present disclosure to provide a method and system for evaluating a redox flow battery by evaluating the positive and negative electrolytes in terms of battery capacity fading and information about the in situ valence balance of the positive and negative electrolytes And quickly solve the capacity fading problem of redox flow battery

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  • Method and system for evaluating redox flow battery
  • Method and system for evaluating redox flow battery
  • Method and system for evaluating redox flow battery

Examples

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no. 1 example

[0035] First embodiment - mode for assessing state of charge

[0036] Figure 4 is a schematic diagram showing the operation of the redox flow battery evaluation system according to the first embodiment of the present disclosure.

[0037] refer to Figure 4 , the control unit 20 controls the opening / closing states of the three-way valves 118, 120, 122, 124, 126, 128, 130, and 132, thereby controlling the path of the flow channel, so that the electrolyte discharged from the electrolyte tanks 104 and 106 is reintroduced into the electrolyte tank after passing through the detection cells 108 and 110 104 and 106. The opening / closing states of the three-way valve controlled by the control unit 20 in the first embodiment are as follows:

[0038] - Three-way valves 118, 120, 122, 124, 126, 128, 130 and 132: "closed" state.

[0039] Specifically, the three-way valves 118, 120, 122, 124, 126, 128, 130, and 132 are all maintained in the "closed" state, and the moving paths of the ...

no. 2 example

[0077] Second embodiment - mode for assessing capacity fade

[0078] Figure 6 is a schematic diagram showing the operation of the redox flow battery evaluation system according to the second embodiment of the present disclosure.

[0079] refer to Figure 6, the control unit 20 is configured to control the opening / closing states of the three-way valves 118, 120, 122, 124, 126, 128, 130, and 132, thereby controlling the path of each flow channel, so that the electrolyte discharged from the detection cells 108 and 110 does not pass through the tanks 104 and 106 or The stirrer 112 is reintroduced into the detection cells 108 and 110 . The opening / closing state of the three-way valve controlled by the control unit 20 in the second embodiment is as follows:

[0080] - three-way valves 126, 128, 130 and 132: "closed" state;

[0081] - Three-way valves 118, 120, 122 and 124: "open" state.

[0082] Therefore, the movement paths of the first electrolyte and the second electrolyt...

no. 3 example

[0095] Third Example - Mode for Estimating Oxidation Value

[0096] Figure 8 is a schematic diagram showing the operation of the redox flow battery evaluation system according to the third embodiment of the present disclosure.

[0097] refer to Figure 8 , the control unit 20 is configured to control the opening / closing states of the three-way valves 118, 120, 122, 124, 126, 128, 130, and 132, thereby controlling the path of each flow channel, so that the electrolyte discharged from the detection cells 108 and 110 is reintroduced after passing through the stirrer 112 to the detection batteries 108 and 110. The opening / closing state of the three-way valve controlled by the control unit 20 in the third embodiment is as follows:

[0098] - Three-way valves 118, 120, 122, 124, 126, 128, 130 and 132: "open" state.

[0099] Specifically, the three-way valves 118, 120, 122, 124, 126, 128, 130, and 132 are all maintained in the "open" state, and the movement paths of the first ...

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Abstract

A system for evaluating a redox flow battery according to an embodiment of the present disclosure includes: a control unit configured to control the path of a flow channel connected between a detection cell and the redox flow battery or a flow channel connected between the detection cell and an agitator; and an evaluation unit configured to evaluate any one of the state of charge, capacity fade and oxidation number balance of an electrolyte, which is used in the redox flow battery, by measuring a current or voltage of the detection cell based on the controlling of the path by the control unit. According to the present disclosure, the capacity fade problem of a redox flow battery can be quickly coped with by evaluating the information of the positive and negative electrode electrolytes on battery capacity fade and information about the valence balance of the electrolytes in situ.

Description

technical field [0001] The present invention relates to methods and systems for evaluating redox flow batteries, and more particularly, to methods for evaluating the in situ state of an electrolyte of a redox flow battery to overcome capacity fade of a redox flow battery and system. Background technique [0002] A redox flow battery refers to an electrochemical energy storage device that stores or releases electrical energy through a redox reaction of ions contained in an electrolyte. A positive electrolyte and a negative electrolyte of a redox flow battery are separated from each other by an electrolyte membrane, and diffusion occurs due to a concentration difference of ions at both ends of the electrolyte membrane. [0003] However, since the diffusion speed of the active material varies depending on the type of the active material, a phenomenon occurs in which the amount of the active material is biased toward either one of the positive electrolyte and the negative elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCH01M8/04552H01M8/04574G01R31/3606H01M8/20G01R31/36H01M8/04746H01M8/04753H01M8/04544H01M8/188H01M8/04276H01M8/04582G01R31/378Y02E60/50H01M8/04537H01M8/18
Inventor 金载珉李知泳李承沿金守焕芮熙昌
Owner OCI
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