Flow Battery Thermal Activation for Pump-Free Electrolyte Circulation
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Solution Overview
Problem
Existing flow batteries require mechanical or electrical pumps to circulate anolyte and catholyte, which increases complexity and weight, and there is a need for a more efficient and reliable pumping mechanism.
Innovation Solution
Utilizing thermally activated materials in the anode and cathode circuits that expand and contract due to thermal changes to drive the flow of anolyte and catholyte without the need for additional pumps, achieved through chambers formed from materials with varying thermal expansion coefficients and reinforced with additional materials to control shape changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical or electrical pumps are used to circulate anolyte and catholyte, then the flow battery can operate reliably, but the system complexity and weight increase
Solution Approach 1:
The flow battery system uses its own thermal energy to drive the circulation of electrolytes. The thermal expansion and contraction of the electrolyte solution itself creates the pumping action, eliminating the need for external mechanical or electrical pumps. This self-service mechanism reduces system complexity while maintaining reliable flow circulation.
Solution Approach 2:
The invention exploits changes in thermal parameters (temperature) to drive electrolyte circulation. By utilizing thermal expansion and contraction of the electrolyte solution in response to temperature variations, the system converts thermal parameter changes into mechanical flow motion, replacing complex pumping systems with a simpler thermal-driven mechanism.
2Reliability
If mechanical or electrical pumps are used to circulate anolyte and catholyte, then the flow battery can operate reliably, but the system weight increases
Solution Approach 1:
The system uses the thermal properties of its own electrolyte solution to generate pumping action. The electrolyte's thermal expansion and contraction create natural circulation currents that drive flow through the battery components, eliminating the need for heavy external pumps and significantly reducing system weight.
Solution Approach 2:
The invention replaces mechanical pumping systems with a thermal-driven circulation mechanism. Instead of using mechanical pumps driven by motors or other mechanical actuators, the system uses thermal expansion and contraction to generate the forces needed for electrolyte circulation, thereby eliminating heavy mechanical components.
3Device complexity
If thermal expansion materials are used to drive electrolyte flow, then pumps are eliminated, but the chamber shape must be precisely controlled
Solution Approach 1:
The chamber structure incorporates materials with different thermal expansion coefficients in specific locations to control directional shape changes. By applying local quality variations in material composition, the design guides the thermal expansion to produce the desired pumping action while maintaining manufacturability through additive processes.
Solution Approach 2:
The invention uses composite materials with varying thermal expansion properties within the chamber structure. These composite materials are strategically positioned to control the chamber's shape changes during thermal cycling, enabling precise flow control while accommodating manufacturing tolerances through additive manufacturing.
4Device complexity
If chambers are formed from materials with varying thermal expansion coefficients, then flow is driven thermally, but the manufacturing process becomes more complex
Solution Approach 1:
The invention changes the manufacturing approach to accommodate varying thermal expansion materials. By utilizing additive manufacturing processes, the system can incorporate multiple materials with different thermal properties in a single integrated chamber structure, simplifying the overall manufacturing process despite the material complexity.
Solution Approach 2:
The use of composite materials with different thermal expansion coefficients is enabled through additive manufacturing technology. This allows the complex multi-material chamber structure to be manufactured as an integrated component rather than requiring assembly of multiple parts, thereby maintaining ease of manufacture despite the sophisticated material requirements.
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 approach simplifies the battery design by eliminating the need for external pumps, enhances reliability, and reduces weight, while utilizing thermal energy for activation.
Implementation Method 1
The flow of anolyte is driven through the anode circuit by thermal expansion and/or thermal contraction of one or more components of the anode circuit
Implementation Method 2
The flow of anolyte is driven through the anode circuit by thermal expansion and/or thermal contraction of one or more components of the anode circuit
Implementation Method 3
The chamber is configured to change perimetrical shape when a temperature of an interior of the chamber is increased
Data Source
AI summary
A battery system includes an anode circuit configured to urge a flow of anolyte therethrough to an anode side of an electrode and a cathode circuit configured to urge a flow of catholyte therethrough to a cathode side of the electrode. An electric circuit is operably connected to the electrode to utilize electrical energy generated via a chemical reaction between the flow of anolyte and the flow of catholyte at the electrode. The flow of anolyte is driven through the anode circuit by thermal expansion and/or thermal contraction of one or more components of the anode circuit. The flow of catholyte is driven through the cathode circuit by thermal expansion and/or thermal contraction of one or more components of the cathode circuit.