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Current collecting plates and liquid stream battery stack adopting same

A liquid flow battery stack and collector plate technology, which is applied in the field of vanadium batteries, can solve problems such as difficult sealing and complex sealing structure design, so as to avoid sealing design, reduce the complexity of application and design, and have a compact and simple structure Effect

Active Publication Date: 2014-02-19
DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a current collecting plate and a flow battery stack including it, so as to solve the technical problems in the prior art that the design of the sealing structure of the flow battery stack is complicated and the sealing is difficult

Method used

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  • Current collecting plates and liquid stream battery stack adopting same
  • Current collecting plates and liquid stream battery stack adopting same
  • Current collecting plates and liquid stream battery stack adopting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Graphite plates were selected as current collectors, highly conductive porous graphite materials were used as electrodes, and Nafion membranes were used as ion exchange membranes. The current collectors were prepared according to the method shown in Figure 4. The above components and sealing rings are assembled into a vanadium monolithic battery, and 40 of the above single cells are assembled in series to form a flow battery stack device. Since no flow frame is used, the number of sealing rings used is 82. After testing, the charge-discharge coulombic efficiency of the flow battery stack is 91.7%, the voltage efficiency is 84.1%, and the energy efficiency is 77.1%.

Embodiment 2

[0041] Material is identical with embodiment 1, prepares Figure 4a-4b The engraving shown has a manifold with meandering fluid flow paths. The above components and sealing rings are assembled into a vanadium monolithic battery, and 40 of the above single cells are assembled in series to form a flow battery stack. Since no flow frame is used, the number of sealing rings used is 82. After testing, the charge-discharge coulombic efficiency of the flow battery stack is 93.5%, the voltage efficiency is 84.2%, and the energy efficiency is 78.7%.

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Abstract

The invention discloses current collecting plates and a liquid stream battery stack adopting the same. The current collecting plates are provided with liquid inlets and liquid outlets, as well as grooves, wherein the grooves are formed on one sides of the current collecting plates, and used for accommodating and being matched with electrodes. The current collecting plates are provided with the grooves for accommodating the electrodes, have a function of liquid stream frame, and save the liquid stream frame designed in the whole liquid stream battery stack, so as to avoid substantial and complex designs of the current collecting plates and the liquid stream frame, decrease the complexity of the application and the design of a sealing component, and enable the structure for the battery stack to be compact and simple.

Description

technical field [0001] The invention relates to the field of vanadium batteries, in particular to a current collecting plate and a liquid flow battery stack including the same. Background technique [0002] The all-vanadium redox flow battery is an electrochemical reaction device that performs redox with vanadium ion electrolytes in different valence states, and can efficiently realize the mutual conversion between chemical energy and electrical energy. This type of battery has the advantages of long service life, energy conversion efficiency, good safety, and environmental friendliness. It can be used in large-scale energy storage systems for wind power generation and photovoltaic power generation. It is one of the main choices for power grid peak shaving and load balancing one. [0003] All-vanadium redox flow batteries use vanadium ions V 4+ / V 5+ and V 2+ / V 3+ As the redox pair of the positive and negative electrodes of the battery, the positive and negative electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/18
CPCY02E60/528Y02E60/50
Inventor 汤浩殷聪李婷杨海玉谢光有刘虹邑
Owner DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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