Liquid flow frame for liquid flow battery

A flow battery and flow frame technology, applied in the field of flow frame, can solve the problems of unsatisfactory battery efficiency of all-vanadium flow battery, short battery life, and the structure of the flow frame of all-vanadium flow battery needs to be improved.

Pending Publication Date: 2018-01-26
TSINGHUA UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the battery efficiency of the all-vanadium redox flow battery is not ideal, and there is also a technical problem of short service life of the battery with the flow frame of the above-mentioned flow channel structure.
[0005] Therefore, the current flow frame structure for all-vanadium redox flow batteries still needs to be improved.

Method used

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  • Liquid flow frame for liquid flow battery
  • Liquid flow frame for liquid flow battery
  • Liquid flow frame for liquid flow battery

Examples

Experimental program
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Embodiment 1

[0059] In this embodiment, a fluid dynamics simulation is performed on the liquid inlet channel of the liquid flow frame. Among them, the specific conditions of the simulation are that the inlet flow velocity is set to be equal to 0.4m / s, and the outlet is set to be equal pressure outlet. In this example, the length of the tapered flow channel is 120mm, and the parameters in formula 1 are a=1 / 1800, b =1 / 60, c=5.

[0060] The fluid simulation results of this embodiment are as follows Figure 5 As shown, the simulation results indicate the distribution of electrolyte velocity (Velocity) inside the flow channel and out of the shunt flow channel with a tapered longitudinal cross-sectional area. Depend on Figure 5 It can be seen that the shunt channel with tapered longitudinal cross-sectional area can realize the uniform distribution of the flow rate and velocity of the electrolysis flowing into the porous electrode, which can meet the uniform distribution effect of the electrol...

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Abstract

The invention provides a liquid flow frame for a liquid flow battery. The liquid flow frame includes a first shunt flow channel, a first transition flow channel, a second shunt flow channel and a second transition flow channel; the first shunt flow channel is arranged at one end of a reaction zone and communicates with the reaction zone, and a longitudinal cross-sectional area of the first shunt flow channel decreases gradually in a first direction; one end of the first transition flow channel communicates with one end, having larger longitudinal cross-sectional area, of the first shunt flow channel, and the other end of the first transition flow channel is provided with a first liquid port; the second shunt flow channel is arranged at the other end of the reaction zone and communicates with the reaction zone, and the longitudinal cross-sectional area of the second shunt flow channel decreases gradually in a second direction; one end of the second transition flow channel communicates with one end, having larger longitudinal cross-sectional area, of the second shunt flow channel, and the other end of the second transition flow channel is provided with a second liquid port, wherein the first direction and the second direction are opposite. According to the liquid flow frame provided by the invention, and with the shunt flow channels having the flow channel width decreasing gradually, the flow quantity and speed of an electrolyte solution flowing into the reaction zone are more homogenized, and the service life of electric piles is prolonged.

Description

technical field [0001] The present invention relates to the field of liquid flow batteries, and in particular, the present invention relates to a flow frame for a liquid flow battery. Background technique [0002] The all-vanadium redox flow battery is a large-scale energy storage battery with higher efficiency, longer life and higher safety. It can effectively solve the problem of unstable output of wind power generation and solar power generation, and has a great effect on the flat peak and valley filling of the power grid. The main principle is to use vanadium ion solutions of different valence states as the positive and negative electrolytes, and the external pump drives the electrolyte to circulate between the liquid storage tank and the stack, and the electrolyte undergoes oxidation-reduction reactions in the stack to complete charging. battery during discharge. [0003] The core component of the all-vanadium redox flow battery is the battery stack, which is mainly c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0273H01M8/18
CPCY02E60/50
Inventor 谭磊肖文扬
Owner TSINGHUA UNIV
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