Welded Four-Layer Electrolyzer Modules With Integrated Cooling
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Solution Overview
Problem
Existing electrolyzers face challenges in achieving high rigidity and efficient temperature control while maintaining cost-effectiveness and operational reliability, as increased layers can lead to component misalignment and reduced efficiency, and previous solutions either compromise on cooling channels or do not adequately address these issues.
Innovation Solution
A four-layer electrolyzer module structure composed of steel plates, with two separator plates combined into a bipolar plate and an anode and cathode plate, forming a rigid module with separate compartments for electrolyte and coolant, allowing for efficient temperature control and gas separation, and featuring perforations for optimal electrolysis and gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the number of layers in the electrolyzer cell is increased to improve temperature control and gas separation, then the temperature control efficiency and gas separation performance are improved, but the risk of component misalignment increases and operational reliability deteriorates
Solution Approach 1:
The patent combines the separator and bipolar plate into a single integrated component called a bipolar separator plate. This merging eliminates the need for separate separator and bipolar plate layers, reducing the total number of layers in the electrolyzer cell while maintaining both gas separation and temperature control functions. The integrated plate provides structural rigidity, prevents component misalignment, and enables efficient coolant flow through internal channels, thereby improving operational reliability without sacrificing temperature control efficiency.
2Temperature
If more layers are added to the electrolyzer module to enhance cooling capability, then the temperature control improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The bipolar separator plate integrates multiple functions (separation, conduction, cooling) into a single component structure, reducing device complexity. The internal coolant channels are incorporated within the plate itself rather than requiring separate cooling layers, simplifying the overall module design while maintaining effective temperature control capability.
Solution Approach 2:
The bipolar separator plate acts as an intermediary component that mediates between the electrodes and the coolant system. It provides internal channels for coolant flow that efficiently remove heat from the electrolysis cells without requiring additional complex cooling mechanisms or multiple separate layers.
3Speed
If traditional separator and bipolar plate structures are used separately, then gas separation is achieved, but structural rigidity and resistance to component movement are insufficient
Solution Approach 1:
The separator and bipolar plate are merged into a single rigid bipolar separator plate structure that maintains both gas separation functionality and structural integrity. The integrated design provides inherent structural rigidity that prevents component movement and misalignment while maintaining efficient gas separation through the plate's internal structure and channel design.
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 four-layer module design enhances operational reliability, allows for effective temperature control, and improves hydrogen production efficiency by maintaining structural rigidity and enabling efficient gas and coolant flow, while being suitable for mass production at a relatively low cost.
Implementation Method 1
an ion conducting membrane is sandwiched between two electrodes, and a voltage is applied across the electrodes. The voltage results in water from the aqueous electrolyte being split into hydrogen and oxygen and a final separation of hydrogen gas and oxygen gas on opposite sides of the membrane
Implementation Method 2
The four plates are welded together to form a rigid module with three separate compartments
Implementation Method 3
a third compartment between the first and second separator plates, which is a coolant compartment with a liquid-coolant flow path inside the two-layer BPP and which contains coolant
Implementation Method 4
a voltage is applied across the electrodes. The voltage results in water from the aqueous electrolyte being split into hydrogen and oxygen
Data Source
AI summary
Electrolyzer comprising modules that sandwich ion-transporting membranes in between adjacent modules. The modules are formed as four-layer structures of four metal plates, typically steel plates, including two separator plates combined into a BPP and an anode plate and a cathode plate respectively on opposite sides of the BPP. The four plates are welded together to form a rigid module with three separate compartments, one anode compartment, one cathode compartment and a coolant compartment.