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Electric pile of redox flow battery

A liquid flow battery and flow battery technology, applied in the direction of fuel cells, regenerative fuel cells, fuel cell grouping, etc., can solve the problems of high sealing cost and complex structure, reduce the number of parts, easy to operate and assemble, and reduce the thickness of the battery Effect

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure sealing, gaskets need to be installed on both sides of the electrode frame in contact with the bipolar plate and ion exchange membrane, resulting in complex structure and high sealing cost

Method used

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  • Electric pile of redox flow battery
  • Electric pile of redox flow battery
  • Electric pile of redox flow battery

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Select a conductive fluororubber plate with a conductivity of 20S / cm as the bipolar plate, wherein the conductive filler is graphite powder, the degree of graphitization is 97%, and the mass ratio is 60%; the rubber component is fluororubber, and the mass ratio is 40% . according to figure 2 The structure shown is assembled into an all-vanadium flow energy storage single cell, in which the electrode frame 4 is 3 mm thick, the electrode 5 is 5 mm thick carbon felt, and the gasket 3 is 0.5 mm thick fluororubber. As shown in Table 1, using the all-vanadium redox flow cell of the present invention, the current density is 80mA / cm 2 , the voltage efficiency and energy efficiency were 88.2% and 83.7%, respectively, which were improved compared with the cell efficiency in the comparative example.

Embodiment 2

[0024] Select a conductive EPDM plate with a conductivity of 10S / cm as the bipolar plate, wherein the conductive filler is carbon black, the degree of graphitization is 60%, and the mass ratio is 30%; the rubber component is EPDM rubber , the mass ratio is 70%. according to figure 2 The structure shown is assembled into an all-vanadium flow energy storage single cell, in which the electrode frame 4 is 3 mm thick, the electrode 5 is 5 mm thick carbon felt, and the gasket 3 is 0.5 mm thick fluororubber. As shown in Table 1, using the all-vanadium redox flow cell of the present invention, the current density is 80mA / cm 2 , the voltage efficiency and energy efficiency were 87.6% and 84.1% respectively, which was improved compared with the cell efficiency in the comparative example.

Embodiment 3

[0026] A conductive polyolefin elastomer plate with a conductivity of 50 S / cm is selected as a bipolar plate, wherein the conductive filler is graphite powder and carbon black, and the mass ratio is 40% and 20% respectively; the polymer matrix component is polyolefin elastomer , the mass ratio is 40%. according to figure 2 The structure shown is assembled into an all-vanadium flow energy storage single cell, in which the electrode frame 4 is 3 mm thick, the electrode 5 is 5 mm thick carbon felt, and the gasket 3 is 0.5 mm thick fluororubber. As shown in Table 1, using the all-vanadium redox flow cell of the present invention, the current density is 80mA / cm 2 , the voltage efficiency and energy efficiency were 88.9% and 84.6% respectively, which was improved compared with the cell efficiency in the comparative example.

[0027] Table 1 The battery efficiency of the all-vanadium flow energy storage single battery at different current densities when the battery structure of th...

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Abstract

Disclosed is an electric pile of a redox flow battery. The electric pile comprises two or more than two sections of single batteries; each single battery comprises a bipolar plate, an electrode frame, a sealing gasket, an electrode, a membrane, an electrode, a sealing gasket, an electrode frame and a bipolar plate which are laminated in sequence, wherein each bipolar plate is made from a conductive rubber material; each electrode frame and the corresponding bipolar plate are in direct contact and are fitted in a sealing manner; and a sealing gasket is not needed to be put between each electrode frame and the corresponding bipolar plate. Compared with the existing redox flow battery which adopts a bipolar plate made from conductive plastic, the redox flow battery obtained by the invention adopts the bipolar plate made from conductive rubber material, so that a sealing gasket between the electrode and the corresponding bipolar plate can be omitted due to the sealing function of the conductive rubber material; and therefore, the structure of the cell is simplified, sealing parts are reduced, and the sealing cost of the redox flow energy storage cell is lowered.

Description

technical field [0001] The invention relates to the field of liquid flow energy storage batteries in chemical energy storage technology, in particular to an all-vanadium flow energy storage battery. Background technique [0002] All-vanadium redox flow energy storage battery has independent output power and capacity, flexible system design; high energy efficiency, long life, high operation stability and reliability, low self-discharge; large degree of freedom in site selection, no pollution, easy maintenance It has the advantages of simplicity, low operating cost, and high safety. It has broad development prospects in large-scale energy storage. It is considered to be an effective method to solve the random and intermittent unsteady characteristics of renewable energy generation systems such as solar energy and wind energy. There are significant demands in renewable energy power generation and smart grid construction. [0003] The all-vanadium flow energy storage battery is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/24H01M8/02
CPCH01M8/02H01M8/0271H01M8/0276H01M8/18H01M8/24Y02E60/50
Inventor 刘涛张华民李先锋
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