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All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof

An energy storage battery and all-vanadium liquid flow technology, which is applied in the direction of fuel cell additives, fuel cell control, regenerative fuel cells, etc., can solve the long-term stable operation of the unfavorable liquid flow energy storage battery system, inconsistent power of subsystems, electrolyte Capacity fading and other issues to achieve the effect of reducing impact, ensuring consistency, and delaying fading

Inactive Publication Date: 2013-01-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The inconsistency of the power of the above subsystems is not conducive to the long-term stable operation of the large-scale flow energy storage battery system, and will also cause the attenuation of the electrolyte capacity of the flow energy storage battery system due to series and parallel connections.

Method used

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  • All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof
  • All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof
  • All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof

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Embodiment 1

[0033] Such as figure 2 An all-vanadium redox flow energy storage battery system shown is composed of two all-vanadium redox flow energy storage battery subsystems, each subsystem consists of a positive electrode electrolyte storage tank 1, a negative electrode electrolyte storage tank 2, and a circulation pump 3. Composed of an electric valve 4, a battery module 5 and pipelines; the positive electrolyte storage tank 1 is connected to the inlet and outlet of the positive electrolyte of the battery module 5 through two pipelines A and B respectively, and the positive electrolyte in the battery module 5 A circulation pump 3 is provided on the connecting pipeline between the inlet and the positive electrolyte storage tank 1, and a valve 4 is provided between the circulation pump 3 and the outlet of the positive electrolyte storage tank 1; the negative electrolyte storage tank 2 passes through two pipelines C , D are respectively connected with the negative electrode electrolyte ...

Embodiment 2

[0036] Such as image 3 An all-vanadium redox flow energy storage battery system shown is composed of four all-vanadium redox flow energy storage battery subsystems. The four subsystems are divided into two groups on average, and the two subsystems in each group are connected through a parallel circuit. Connection, groups are connected through series circuits. Each subsystem consists of a positive electrolyte storage tank 1, a negative electrode electrolyte storage tank 2, a circulation pump 3, a valve 4, a battery module 5 and pipelines; the positive electrolyte storage tank 1 is connected to the The positive electrode electrolyte inlet and outlet of the battery module 5 are connected, and a circulation pump 3 is arranged on the connection pipeline between the positive electrode electrolyte inlet of the battery module 5 and the positive electrode electrolyte storage tank 1, and the circulation pump 3 and the positive electrode electrolyte storage tank 1 A valve 4 is arranged...

Embodiment 3

[0039] Such as Figure 4 An all-vanadium redox flow energy storage battery system shown is composed of four all-vanadium redox flow energy storage battery subsystems. The four subsystems are divided into two groups on average, and the two subsystems in each group are connected by a series circuit Connection, groups are connected through parallel circuits. Each subsystem consists of a positive electrolyte storage tank 1, a negative electrode electrolyte storage tank 2, a circulation pump 3, a valve 4, a battery module 5 and pipelines; the positive electrolyte storage tank 1 is connected to the The positive electrode electrolyte inlet and outlet of the battery module 5 are connected, and a circulation pump 3 is arranged on the connection pipeline between the positive electrode electrolyte inlet of the battery module 5 and the positive electrode electrolyte storage tank 1, and the circulation pump 3 and the positive electrode electrolyte storage tank 1 A valve 4 is arranged betw...

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Abstract

The invention relates to an all-vanadium redox flow energy storage battery system and a subsystem power consistency adjustment method thereof. The adjustment method is characterized in that: a blending pipeline is arranged in the all-vanadium redox flow energy storage battery system to blend the positive and negative electrolyte of each subsystem and then redistribute to each electrolyte storage tank, internal resistance consistency of each subsystem and positive and negative electrolyte charging state SOC consistency of each subsystem are adjusted in the process of battery working, thus the power consistency of subsystems in the working process is guaranteed. According to the invention, the invention is especially suitable for the application of the all-vanadium redox flow energy storage battery system in large-scale energy storage field, long-term stable operation of the all-vanadium redox flow energy storage battery system is guaranteed, and the electrolyte capacity attenuation of the all-vanadium redox flow energy storage battery system caused by series-parallel connection is effectively postponed.

Description

technical field [0001] The invention relates to an all-vanadium liquid flow energy storage battery system and an adjustment method thereof, in particular to an all-vanadium liquid flow energy storage battery system and an adjustment method for power consistency of each subsystem during operation. Background technique [0002] As a commodity that is difficult to store but indispensable, electric energy has always been an indispensable energy source for modern human life and production. People have been researching ways to balance electricity production and demand to solve the contradiction between supply and demand, so the development of efficient energy storage technology has become a focus. [0003] All-vanadium flow energy storage battery, as a new type of electric energy storage device, has high energy conversion efficiency, which can reach 70% to 80%; large storage capacity, flexible system design; high reliability, and can be deeply discharged by more than 90% , and th...

Claims

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Application Information

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IPC IPC(8): H01M8/18H01M8/04H01M8/04298
CPCY02E60/528Y02E60/50
Inventor 张华民马相坤邢枫王晓丽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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