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Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof

A flow battery, trapezoidal technology, applied in battery electrodes, regenerative fuel cells, fuel cell grouping, etc., can solve the problems of uneven electrolyte reaction, affecting battery efficiency, voltage loss, etc., to increase the charge and discharge time, improve the concentration. Uniformity, the effect of improving voltage efficiency

Active Publication Date: 2016-04-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

When the electrolyte flows into the electrode, it is accompanied by an electrochemical reaction. At a similar flow rate, the concentration of the reactant will gradually decrease from the inlet to the outlet, causing the concentration gradient of the reactant at the inlet and outlet, resulting in uneven reaction of the electrolyte in the battery. , causing concentration polarization and voltage loss, thereby affecting battery efficiency

Method used

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  • Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof
  • Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof
  • Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof

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Embodiment Construction

[0019] according to figure 1 , for a single trapezoidal flow battery:

[0020] The positive porous electrode is placed in the positive electrode placement area-4 of the single trapezoidal positive electrode flow frame-1, and the positive electrode is arranged on the side of the single trapezoidal positive electrode flow frame-1 near the lower bottom edge (long side) of the positive electrode trapezoid Electrolyte liquid inlet flow channel, positive electrode electrolyte liquid inlet flow channel includes positive electrode liquid inlet port-5 and positive electrode liquid inlet diversion channel-6; positive electrode electrolyte is provided on the side close to the upper bottom (short side) of the trapezoidal shape of the positive electrode Outlet flow channel, the positive electrode electrolyte outlet flow channel includes the positive electrode liquid diversion channel-7 and the positive electrode outlet port-8; the positive electrode electrolyte flows in from the positive e...

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Abstract

The invention provides a mono-trapezoid flow battery, a poly-trapezoid flow battery and an electric pile thereof. Both a cathode porous electrode and an anode porous electrode in the mono-trapezoid flow battery are trapezoidal plate electrodes and are respectively arranged inside a cathode electrolyte flow frame and an anode electrolyte flow frame. On the cathode electrolyte flow frame and the anode electrolyte flow frame, two electrolyte inlet flow paths are arranged nearby the lower bottom edges respectively of the cathode porous electrode and the anode porous electrode, and two electrolyte outlet flow paths are arranged nearby the upper bottom edges respectively of the cathode porous electrode and the anode porous electrode. The electrolyte flows into the cathode porous electrode through the lower bottom edges of the cathode porous electrode and the anode porous electrode and then flows out from the upper bottom edges of the cathode porous electrode and the anode porous electrode. The trapezoid flow battery is reduced in concentration polarization at certain degree and further is reduced in voltage loss, and meanwhile, is improved in utilization efficiency of the electrolyte and is increased in total efficiency.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to a single trapezoidal flow battery, a multi-trapezoidal flow battery and a stack thereof. Background technique [0002] Existing liquid flow batteries, according to the end plate, collector plate, (double) polar plate, positive electrode porous electrode, positive electrode flow frame, ion exchange membrane, negative electrode flow frame, negative electrode porous electrode, (double) electrode plate, collector The flow plate and the end plate are sequentially stacked and assembled, and the flow battery stack is formed by connecting more than two flow batteries in series. The positive and negative porous electrodes are rectangular, the electrolyte flows in at one end of the rectangle, and the other end of the rectangle flows out at a speed similar to that of the inlet. When the electrolyte flows into the electrode, it is accompanied by an electrochemical reaction. At a similar flow r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M8/18H01M8/24
CPCY02E60/50
Inventor 张华民郑琼邢枫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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