Metal-Water Electrochemical Cell With Natural Electrolyte Circulation
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Solution Overview
Problem
Existing power generation techniques for underwater and water-activated devices, such as sub-sea sensors, are inefficient due to the need for oxygen in fossil fuel combustion, high pressure vessels for lithium ion devices, and parasitic losses from pumping devices in metal or water fuel cells, which increase costs and reduce energy output.
Innovation Solution
A metal-water electrochemical cell with a porous or prismatic media that allows aqueous electrolyte to flow naturally through the cell without pumping, using potassium hydroxide and controlled inlets and outlets to maintain electrolyte levels and release hydrogen, eliminating the need for pumping devices and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If pumping devices are used to circulate electrolyte in metal-water fuel cells, then electrolyte circulation is achieved, but parasitic power loss increases and output power decreases
Solution Approach 1:
The patent removes the pumping device from the fuel cell system entirely. The electrolyte circulation function is extracted from the mechanical pumping system and replaced by natural convection currents generated by temperature differences within the cell, eliminating the parasitic power loss associated with mechanical pumping while maintaining electrolyte circulation.
Solution Approach 2:
The fuel cell system performs self-circulation of electrolyte through natural convection. The exothermic reactions within the cell create temperature gradients that drive fluid circulation without external mechanical assistance, allowing the system to serve its own electrolyte circulation needs without consuming additional power.
2Reliability
If pumping devices and valves are used to maintain electrolyte level, then electrolyte level control is achieved, but device complexity increases and reliability decreases
Solution Approach 1:
The patent eliminates pumping devices and valves from the electrolyte level control system. Instead of using mechanical components to actively manage electrolyte levels, the design relies on passive gravitational drainage and natural convection to maintain appropriate electrolyte levels, significantly reducing component count and potential failure points.
Solution Approach 2:
The electrolyte level control is achieved through self-regulating passive mechanisms. The system uses gravity-driven drainage and natural convection patterns to automatically maintain electrolyte levels without requiring active control systems, pumps, or valves, thereby improving reliability through simplicity.
3Adaptability or versatility
If pressure vessels are used for lithium ion devices to operate at depth, then operational capability at various depth levels is achieved, but device weight and complexity increase
Solution Approach 1:
The metal-water fuel cell system is inherently adapted to underwater operation without requiring external pressure vessels. The cell chemistry and construction are designed to function directly in the underwater environment, using the surrounding water as both coolant and operational medium, thereby eliminating the need for additional pressure-containing structures.
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 solution reduces costs and improves reliability by eliminating the need for pumping devices and valves, enabling efficient power generation for underwater devices without parasitic losses, and allowing for more efficient deployment of sensor devices.
Implementation Method 1
The electrolyte flows by at least one of natural convection, molecular diffusion, a temperature gradient, and a phase gradient
Implementation Method 2
The electrolyte flows by at least one of natural convection, molecular diffusion, a temperature gradient, and a phase gradient
Implementation Method 3
The electrolyte flows by at least one of natural convection, molecular diffusion, a temperature gradient, and a phase gradient
Implementation Method 4
a porous or prismatic media in fluidic contact with the defined pathway and positioned within the enclosure
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
An electrochemical cell and a method of operating the same. In accordance with various embodiments, the cell includes an anode, one or more cathodes opposite the anode defining a pathway there between. Chemical reactions allow the electrolyte to flow through the defined pathway without requiring a pumping device.