Electrochemical Hydrogen Pump Structure for Stable Cathode Contact
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Solution Overview
Problem
Existing electrochemical hydrogen pumps face challenges in suppressing the increase in contact resistance between the cathode separator and the cathode, particularly due to deformation caused by high gas pressure in the cathode.
Innovation Solution
The electrochemical hydrogen pump incorporates a design with a first fixing member to prevent movement of the cathode separator, a first end plate on the anode separator, a second end plate on the cathode separator, and a first gas flow channel that supplies hydrogen from the cathode to a space between the second end plate and the cathode separator, thereby maintaining contact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high gas pressure is applied to the cathode to increase hydrogen transfer efficiency, then the hydrogen pressurization capability is improved, but the cathode separator and cathode deform causing contact resistance to increase
Solution Approach 1:
The patent applies preliminary anti-action by introducing a pressing unit (spring or disc spring) that exerts a pressing force on the cathode separator in advance. This pressing force counteracts the deformation caused by high gas pressure before it occurs, preventing the separation between the cathode separator and cathode that would otherwise increase contact resistance. The pressing unit is pre-installed to maintain continuous contact under varying pressure conditions.
Solution Approach 2:
The patent employs parameter changes by using a spring or disc spring that can dynamically adjust its pressing force based on the gas pressure conditions. As the gas pressure in the cathode changes, the spring compresses or extends accordingly, maintaining an optimal pressing force on the cathode separator. This dynamic parameter adjustment ensures continuous good contact between the cathode separator and cathode while accommodating the high pressure requirements for hydrogen pressurization.
2Device complexity
If the cathode separator is allowed to move freely under pressure, then the device structure remains simple, but the contact resistance increases due to deformation
Solution Approach 1:
The patent introduces an intermediary element (the pressing unit with spring or disc spring) between the cathode separator and the surrounding structure. This intermediary component mediates the interaction between the high gas pressure and the cathode separator, providing a controlled pressing force that maintains contact without requiring complex constraint mechanisms. The spring acts as a buffer that translates pressure changes into appropriate contact forces.
Solution Approach 2:
The pressing unit utilizes the high gas pressure in the cathode itself as the driving force to compress the spring, which in turn provides the necessary pressing force on the cathode separator. The system is self-regulating: as pressure increases, the spring compresses more and provides greater pressing force; as pressure decreases, the spring extends and reduces the pressing force. This self-service mechanism maintains reliable contact without requiring external control systems or complex additional components.
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 effectively suppresses the increase in contact resistance between the cathode separator and the cathode, ensuring efficient operation of the hydrogen pump even under high gas pressures.
Implementation Method 1
at least one hydrogen pump unit including an electrolyte membrane, an anode in contact with one main surface of the electrolyte membrane, a cathode in contact with the other main surface of the electrolyte membrane, the at least one hydrogen pump unit transferring, to the cathode, hydrogen contained in a hydrogen-containing gas supplied to the anode and pressurizing the hydrogen
Data Source
AI summary
An electrochemical hydrogen pump includes at least one hydrogen pump unit including an electrolyte membrane, an anode on one main surface of the electrolyte membrane, a cathode on the other main surface of the electrolyte membrane, an anode separator on the anode, and a cathode separator on the cathode, the at least one hydrogen pump unit transferring, to the cathode, hydrogen supplied to the anode and pressurizing the hydrogen, a first fixing member for preventing movement of the cathode separator in a direction in which the cathode separator is stacked, a first end plate on the anode separator at one end in the stacking direction, a second end plate on the cathode separator at the other end in the stacking direction, and a first gas flow channel through which hydrogen in the cathode is supplied to a first space between the second end plate and the cathode separator.