Pulsed Current Regulator for Mobile Water Electrolyzer
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Solution Overview
Problem
Existing hydrogen gas devices for motor vehicles face safety challenges due to the volatility of hydrogen gas and the difficulty in safely transmitting and storing it, particularly in mobile applications, where on-site production is necessary to mitigate these issues.
Innovation Solution
A current regulating system using an array of solid state power switches and an electronic system connected to the water electrolysis chamber, which limits and modulates the current to maintain a desired peak average current, preventing thermal runaway and ensuring safe gas production by adjusting pulse widths based on temperature and conductivity changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current is increased to boost hydrogen production, then gas production rate increases, but thermal runaway risk increases
Solution Approach 1:
The patent applies periodic pulsed current instead of continuous current to the electrolysis chamber. The controller delivers current in controlled pulses with specific width and frequency, allowing the system to achieve high average current for improved hydrogen production while providing rest periods that prevent continuous heating and thermal runaway. This periodic action resolves the contradiction by decoupling peak current intensity from continuous thermal accumulation.
Solution Approach 2:
The patent implements a feedback control system where the controller monitors the state of the electrolysis chamber and adjusts the current pulse parameters in real-time. Based on feedback regarding temperature, gas production rate, and electrical parameters, the controller dynamically modifies pulse width, frequency, and amplitude to maintain optimal hydrogen production while preventing thermal runaway conditions. This closed-loop feedback resolves the contradiction by continuously balancing productivity enhancement against safety constraints.
2Reliability
If pulsed current is used to control gas production, then thermal runaway is prevented, but system complexity increases
Solution Approach 1:
The patent replaces complex mechanical current control systems with solid-state electronic switching components. The current pulses are generated using solid state power switches controlled by electronic timing circuits, eliminating the need for mechanical rheostats, contactors, or complex mechanical regulation mechanisms. This electronic substitution achieves precise pulsed current control for thermal runaway prevention while reducing mechanical complexity and improving reliability.
Solution Approach 2:
The patent controls the electrolysis process by dynamically adjusting electrical parameters (current pulse width, frequency, duty cycle) rather than using complex mechanical or chemical control systems. The controller modifies these electrical parameters to regulate gas production and prevent thermal runaway, achieving reliable safety control through simple parameter modulation of the power supply rather than complex system architecture.
3Measurement precision
If solid state power switches are used for current control, then current precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the current control function into multiple solid state power switches arranged in an array, with each switch controlling a specific portion of the total current. This segmentation allows precise control of the overall current by independently managing multiple smaller switching elements, achieving high current control precision while distributing the complexity across modular, interchangeable components rather than requiring a single complex switching device.
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 effectively regulates hydrogen and oxygen gas production, maintaining purity and safety by controlling current delivery, preventing overheating, and adjusting power according to changing conditions, thus ensuring efficient and safe operation in mobile hydrogen gas production.
Implementation Method 1
The technology of these hydrogen production devices is based upon simple electrolysis of water, splitting the hydrogen from the oxygen.
Implementation Method 2
An array of solid state power switches is operably connected to the water electrolysis chamber. Current is turned on and off by the array of solid state power switches.
Data Source
AI summary
An embodiment of a system and method provides a current regulating device that controls or regulates the current provided to electrolysis chambers that produce hydrogen and oxygen gases. One embodiment of the current regulating device uses the temperature of the fluid in the electrolysis chambers to control the widths of the pulses delivered to the electrolysis chambers to regulate production. Another embodiment of the current regulating device regulates and limits the average current delivered to the electrolysis chambers by adjusting the pulse widths, according to the current demanded during each conduction pulse.