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Easy-to-maintain redox flow battery energy storage system

An energy storage system and flow battery technology, applied in the direction of secondary battery repair/maintenance, can solve the problems of low battery reliability and difficult maintenance, and achieve the effect of high reliability and easy maintenance

Inactive Publication Date: 2009-06-03
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current flow battery energy storage system only relies on the simple series and parallel connection of single cells to meet the output requirements of high power and high current. When a fault occurs, the reliability of the battery with this structure is not high, and maintenance is difficult

Method used

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  • Easy-to-maintain redox flow battery energy storage system
  • Easy-to-maintain redox flow battery energy storage system

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Experimental program
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Embodiment Construction

[0012] According to the overall circuit structure diagram of the system of the present invention, refer to the attached figure 1 . It is assumed that the battery system is composed of K series batteries connected in parallel, and each series of batteries is formed by N battery cells connected in series. There are backup strings in the K series of batteries, and the individual cells in each string of batteries have backup batteries. Assume that in each string of batteries in the figure, the Kth string of batteries is a spare battery, and the switches K and K' connected to the positive and negative DC busbars are disconnected; the Hth string of batteries is a normal working battery, which is connected to the The switches H and H' of the DC positive busbar and the negative busbar are closed. When the H series battery is detected to be faulty and needs to be withdrawn for maintenance, disconnect the two switches H and H' connected to the positive busbar and the negative busbar i...

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Abstract

The invention discloses an easy-to-maintain redox flow battery energy storage system. Redundant structures are both designed in a parallel connected string unit and a series connected single battery pack of the system, when in failure of single string and single battery which are put into operation, the standby single string and the single battery can be put into the operation without affecting the normal operation of the whole battery system and the battery string, and the maintenance is easy, thereby being in line with the requirements of high reliability of a power system on the battery of the energy storage system.

Description

technical field [0001] The invention relates to an easy-to-maintain battery energy storage system, in particular to a battery structure of a liquid flow battery energy storage system used for energy storage in a power system. Background technique [0002] With the development of energy storage technology, large-scale and high-efficiency all-vanadium redox flow battery energy storage will gradually enter the power system. The current flow battery energy storage system only relies on the simple series-parallel connection of single cells to meet the output requirements of high power and high current. When a fault occurs, the reliability of the battery with this structure is not high, and maintenance is difficult. The energy storage battery used in the power system requires high reliability and easy maintenance. Therefore, it is necessary to design a new type of battery structure for the all-vanadium redox flow battery energy storage system to meet the needs of the power system....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42
CPCY02E60/12Y02E60/10
Inventor 胡娟
Owner CHINA ELECTRIC POWER RES INST
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