Electrolyte-Circulating Battery Complex Duct Oxygen Barrier
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Solution Overview
Problem
Conventional redox flow batteries face issues with electrolyte oxidation due to poor heat-dissipating properties of PVC ducts, leading to decreased battery efficiency and discharge capacity.
Innovation Solution
The use of a complex duct with a tubular main body made of a resin, such as polyethylene, and an oxygen block layer composed of an organic material like ethylene-vinyl alcohol copolymer, which reduces oxygen transmission and enhances cooling efficiency without oxidizing the electrolyte.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thickness of the duct is decreased to enhance heat-dissipating property, then cooling efficiency is improved, but oxygen permeation increases causing electrolyte oxidation
Solution Approach 1:
The duct is constructed as a composite structure with an inner resin layer (PVC or polyethylene) for chemical resistance and an outer oxygen block layer (aluminum foil or oxygen-impermeable resin) for oxygen barrier properties. This composite design enables the duct to be thin while simultaneously providing excellent heat dissipation and preventing oxygen permeation.
Solution Approach 2:
The oxygen block layer is disposed on the periphery of the resin main body, creating a nested structure where one material is layered over another. This nested configuration allows the duct to achieve both thermal conductivity and oxygen barrier functions within a minimized thickness.
2Reliability
If conventional PVC ducts are used, then chemical resistance is maintained, but heat-dissipating property is poor reducing battery efficiency
Solution Approach 1:
The duct combines PVC or polyethylene resin for chemical resistance with an oxygen block layer that also provides thermal management. The composite structure maintains the chemical inertness of the resin while adding thermal conductivity through the layered configuration and reduced overall thickness.
Solution Approach 2:
The invention changes the thickness parameter of the duct wall to optimize thermal performance. By reducing the thickness while maintaining structural integrity through the composite structure, the heat dissipation capability is significantly improved without compromising chemical resistance.
3Object-affected harmful factors
If electrolyte oxidation is prevented using thick ducts, then oxygen barrier is improved, but cooling efficiency decreases due to poor thermal conductivity
Solution Approach 1:
The dual-layer composite structure provides both oxygen barrier and thermal management functions simultaneously. The oxygen block layer prevents electrolyte oxidation while the thin overall structure and thermal properties of the materials enable efficient heat dissipation.
Solution Approach 2:
The duct structure is designed to perform multiple functions: chemical resistance, oxygen barrier, and heat dissipation. The composite construction and optimized thickness enable the single duct component to achieve all three functions without requiring additional separate systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents electrolyte oxidation and enhances cooling performance, maintaining battery efficiency and discharge capacity by suppressing oxygen entry and allowing for thinner ducts with improved thermal conductivity.
Implementation Method 1
an oxygen block layer disposed on a periphery of the main body and composed of an organic material that has a lower oxygen transmission rate than the main body
Implementation Method 2
the thickness of the duct is decreased, although the heat-dissipating property is enhanced
Data Source
AI summary
Provided are an electrolyte-circulating battery in which electrolytes are unlikely to be oxidized and are easily cooled, a heat exchanger in which a corrosive liquid flowing through the inside thereof is unlikely to be oxidized and is easily cooled, and a pipe in which a corrosive liquid flowing through the inside thereof is unlikely to be oxelectrolyte-circulating batteryidized, and which is suitable for cooling the corrosive liquid. The electrolyte-circulating battery includes a battery cell and a circulation passage configured to circulate an electrolyte into the battery cell. The circulation passage includes a complex duct, and the complex duct includes a tubular main body composed of a resin and an oxygen block layer disposed on a periphery of the main body and composed of an organic material that has a lower oxygen transmission rate than the main body.