Redox Flow Battery Measuring Cell With Pressure-Gradient Channel
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Solution Overview
Problem
Conventional redox flow batteries have complex structures due to the integration of measuring devices, which increases the risk of electrolyte leakage and reduces flexibility.
Innovation Solution
A simplified structure for the measuring device is achieved by using a connection element with a channel having sections of different cross-sectional areas to create a pressure gradient for electrolyte flow, allowing integration at any point in the electrolyte circuit and minimizing the risk of leakage, along with optional shut-off valves and a structural unit produced using injection molding or additive manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measuring device is integrated into the redox flow battery, then the state of charge can be determined, but the structure becomes complex and the risk of electrolyte leakage increases
Solution Approach 1:
The measuring device is integrated into the existing battery structure by utilizing the same housing and membrane components. The OCV cell shares the bipolar plate and membrane with the battery cells, eliminating the need for separate measuring device housing and reducing overall structural complexity while maintaining measurement functionality.
Solution Approach 2:
The membrane and housing components serve dual functions: they act as structural elements for both the battery cells and the measuring device. The bipolar plate functions as both an electrical conductor for battery cells and as a structural support for the OCV cell, allowing one component to fulfill multiple roles and reducing the total number of parts.
2Measurement precision
If a measuring device is integrated into the redox flow battery, then the state of charge can be determined, but the risk of electrolyte leakage increases
Solution Approach 1:
The OCV cell uses the same membrane and sealing structures as the battery cells, ensuring that the reliability standards and sealing quality are consistent across all components. This integration eliminates additional sealing interfaces that would otherwise increase leakage risk.
Solution Approach 2:
The design includes pressure equalization channels that prevent pressure differences between the battery cells and the OCV cell. By equalizing pressure beforehand, the system prevents stress on seals and membranes that could lead to electrolyte leakage during operation.
3Ease of operation
If conventional measuring device integration is used, then the battery can operate, but flexibility in design and installation is reduced
Solution Approach 1:
The bipolar plate is designed to function both as an electrical component for battery cells and as a structural support for the OCV cell. This universal design allows the measuring device to be integrated into various battery configurations without requiring custom components, enhancing design flexibility while maintaining operational reliability.
Solution Approach 2:
The measuring device is designed as a modular OCV cell that can be independently integrated into the battery assembly. This segmentation allows the measuring function to be added or removed without affecting the battery cells themselves, providing flexibility in system design and installation configurations.
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 design reduces the complexity and risk of electrolyte leakage, enhances flexibility, and allows for reliable determination of electrolyte properties while maintaining low pressure losses and enabling efficient integration of sensors and pump impellers.
Implementation Method 1
a channel (5.1) having a first section (5.1.1) and a second section (5.1.2), wherein the cross section of the first section (5.1.1) is smaller than the cross section of the second section (5.1.2)
Implementation Method 2
The channel 5.1 comprises a first section, which is designated 5.1.1, and a second section, which is designated 5.1.2. The cross section of the first section 5.1.1 is smaller than the cross section of the second section 5.1.2
Data Source
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AI summary
The invention relates to a redox flow battery comprising a cell assembly and a tank device for receiving an electrolyte. The cell assembly comprises a plurality of cells, and the battery comprises at least one measuring device for determining an electrolyte property, comprising at least one measuring cell. The at least one measuring cell comprises at least one connection for supplying electrolyte, at least one connection for discharging electrolyte, and a channel which is connected to one of the electrolyte circuits such that when the electrolyte is being circulated, the electrolyte flows through the channel. The channel comprises a first section and a second section, the cross-section of the first section being smaller than the cross-section of the second section, wherein the connection for discharging electrolyte is connected to the first section by means of a connection line, and the connection for supplying electrolyte is connected to the second section by means of a connection line.