Fluid Regulating Valve for Air-Depolarized Battery Discharge Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrochemical battery cells, such as air-depolarized and air-assisted cells, face limitations in maximum discharge rates due to the rate of oxygen entry into the oxygen reduction electrode, and struggle to control the entry of undesirable gases like CO2 and water, leading to inefficiencies and increased complexity in manufacturing.
Innovation Solution
A fluid regulating system that includes a valve and actuator to control the rate of fluid passage into the battery, monitored by a controller that adjusts based on the rate of change in battery electrical output, ensuring optimal fluid supply during discharge while minimizing unwanted gas entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rate of oxygen entry into the oxygen reduction electrode is increased to achieve higher discharge rates, then the maximum discharge rate is improved, but the control of undesirable gases (CO2 and water) entry becomes more difficult
Solution Approach 1:
The patent employs a dynamic valve mechanism that adjusts the fluid passage area in real-time based on the battery's discharge rate requirements. The valve transitions from a static structure to a dynamic one that can modulate opening size, allowing optimal control of oxygen flow during high discharge periods while restricting CO2 and water entry during low discharge periods. This dynamic adjustment resolves the contradiction by adapting the fluid control characteristics to match the varying operational demands of the battery.
Solution Approach 2:
The invention changes the physical parameters of the fluid passage by varying the valve opening area. During high discharge rates, the valve opens wider to increase oxygen diffusion rate. During low discharge rates or rest periods, the valve closes partially to minimize CO2 and water diffusion. This parameter modulation allows the system to achieve high productivity when needed while maintaining simplicity in the control mechanism by using a single adjustable parameter (valve opening area) to manage multiple gas flows.
2Productivity
If fans are used to force air into cells during high rate discharge, then oxygen supply is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the active material (oxygen) directly from the surrounding environment (air) through a controlled fluid passage system, eliminating the need for external fans or complex air forcing mechanisms. The valve-based regulation system passively allows oxygen to diffuse into the cell when needed, removing the mechanical complexity of fan assemblies, motors, and associated control electronics while maintaining adequate oxygen supply for high discharge rates.
Solution Approach 2:
The battery system uses its own operational state (discharge rate) to automatically regulate fluid flow through the valve mechanism. During high discharge periods, the increased demand for oxygen naturally drives greater diffusion through the opened valve without requiring external forcing devices. The system essentially serves itself by leveraging the electrochemical demand to drive the necessary reactant supply, eliminating the need for fan-based forced convection systems.
3Ease of operation
If valves are used to control air entering the cells, then fluid control is improved, but external means (fans and electronics) are still required to operate the valves
Solution Approach 1:
The patent implements a feedback mechanism where the battery's electrical output characteristics (voltage, current, or power levels) are monitored and used to automatically control the valve position. The control system receives feedback about the discharge rate and adjusts the valve opening accordingly - opening wider during high discharge to increase oxygen supply, and closing during low discharge to prevent CO2 and water ingress. This closed-loop feedback control eliminates the need for external fans or complex electronic control systems while maintaining ease of fluid management.
Solution Approach 2:
The valve mechanism serves multiple functions simultaneously: it regulates oxygen entry during high discharge, prevents CO2 ingress during low discharge, and controls water vapor diffusion. By making the valve a multi-functional component that handles all fluid control requirements based on a single control signal derived from battery performance, the system achieves ease of operation without requiring separate control mechanisms or external devices for each function.
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
The system enhances discharge rates by ensuring sufficient oxygen supply during high demand while minimizing gas entry during low discharge periods, reducing manufacturing complexity and cost, and maintaining efficiency with a responsive and efficient fluid management mechanism.
Implementation Method 1
the rate of diffusion of oxygen into the air electrode is insufficient
Implementation Method 2
The material in the oxygen reduction electrode that promotes the reaction of oxygen with the electrolyte is often referred to as a catalyst
Implementation Method 3
the oxidation of the negative electrode active material with the oxygen
Data Source
AI summary
A fluid regulating system is provided for controlling fluid to a fluid consuming battery having a fluid consuming cell. The fluid regulating system includes a valve and an actuator for opening and closing the valve. The actuator is controlled to open the valve when greater battery electrical output is required and to close the valve when lesser battery electrical output is required to operate a device. A controller controls operation of the actuator to open and close the valve based on a monitored rate of change in electrical output, such as voltage, compared to a rate of change threshold, wherein the valve is opened when the monitored rate of change exceeds the threshold.