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Flow battery system and capacity re-balance method for flow battery

A technology of flow battery and electrolyte, applied in fuel cells, regenerative fuel cells, fuel cell additives, etc., can solve problems such as system capacity attenuation

Pending Publication Date: 2017-12-01
中国东方电气集团有限公司
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  • Abstract
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Problems solved by technology

[0009] The main purpose of the present invention is to provide a flow battery system and a method for rebalancing the capacity of the flow battery, so as to solve the problem that the system capacity of the vanadium battery continues to decline after long-term operation in the prior art

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  • Flow battery system and capacity re-balance method for flow battery

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030]It should be noted that the terms "first"...

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Abstract

The invention provides a flow battery system and a capacity re-balance method for a flow battery. The flow battery system comprises a flow battery unit, a positive electrode electrolyte storage tank and a negative electrode electrolyte storage tank; the flow battery system also comprises a co-mixing equipartition module; the co-mixing equipartition module comprises an electrolyte co-mixing unit and an electrolyte equipartition unit, wherein the electrolyte co-mixing unit is connected with a positive electrode outlet, a negative electrode outlet, the inlet of the positive electrode electrolyte storage tank and the inlet of the negative electrode electrolyte storage tank separately for co-mixing the electrolyte in the positive electrode electrolyte storage tank and the negative electrode electrolyte storage tank; and the electrolyte equipartition unit is connected with the outlet of the positive electrode electrolyte storage tank, the outlet of the negative electrode electrolyte storage tank, a positive electrode inlet and a negative electrode inlet for performing equipartition on the electrolyte in the positive electrode electrolyte storage tank and the negative electrode electrolyte storage tank. By performing co-mixing and equipartition treatment on the positive and negative electrode electrolyte, the problem of capacity fading caused by imbalance of vanadium ion total quantity in the positive and negative electrode electrolyte and the problem of electrolyte volume imbalance caused by water migration are solved.

Description

technical field [0001] The invention relates to the technical field of flow batteries, in particular to a flow battery system and a method for rebalancing the capacity of the flow battery. Background technique [0002] The all-vanadium redox flow battery (referred to as "vanadium battery") is a kind of flow battery, and its principle is to use the redox reaction between vanadium ions in different valence states to store and utilize energy. Different from conventional chemical batteries such as lead-acid batteries and lithium batteries, the reactant electrolyte of the vanadium battery is stored independently in the external liquid storage tank. When charging and discharging, the electrolyte enters the stack through the acid-resistant liquid pump to complete the electrochemical reaction, and then Return to the liquid storage tank to form a closed circulation liquid flow loop. [0003] The electrolyte is the active material of the flow battery, which directly determines the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04276H01M8/18
CPCH01M8/04276H01M8/188Y02E60/50
Inventor 高艳李扬陈光颖刘睿刘竞博罗再祥周正刘佳燚
Owner 中国东方电气集团有限公司
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