Cell Stack and Power Converter Layout for Shorter Hydrogen Wiring
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Solution Overview
Problem
Existing fuel cell systems face challenges in size reduction, power efficiency, and safety due to the placement of the power conversion apparatus away from the fuel cell stack, leading to increased wiring length and potential ignition risks from hydrogen gas leakage.
Innovation Solution
The power conversion apparatus is positioned outside the heating tank, further towards the lower side than the cell stack, with electrical connection via a conductor through the tank's wall, allowing it to overlap the tank vertically, thereby reducing conductor length and minimizing ignition risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power conversion apparatus is disposed away from the cell stack, then safety against hydrogen gas ignition is improved, but the conductor length increases leading to reduced power efficiency
Solution Approach 1:
The power conversion apparatus is positioned in the vertical dimension below the cell stack, while maintaining horizontal overlap. This spatial arrangement in another dimension allows the apparatus to be远离 from potential ignition sources horizontally while minimizing conductor length vertically, thus resolving the contradiction between safety and power efficiency.
2Reliability
If the power conversion apparatus is disposed away from the cell stack, then safety against hydrogen gas ignition is improved, but the overall apparatus size increases
Solution Approach 1:
By utilizing the vertical dimension for separation while maintaining horizontal overlap through the heating tank wall, the design achieves safety separation without increasing the horizontal footprint of the apparatus, thus resolving the contradiction between safety and compact size.
Solution Approach 2:
The power conversion apparatus is positioned to overlap with the heating tank vertically, allowing the conductor to pass through the tank wall. This nested arrangement minimizes the overall apparatus volume by sharing space in the vertical dimension while maintaining functional separation.
3Loss of energy
If the power conversion apparatus is disposed close to the cell stack, then power efficiency is improved by shortening conductors, but safety against hydrogen gas ignition is reduced
Solution Approach 1:
The solution separates the power conversion apparatus from the cell stack in the vertical dimension while maintaining horizontal alignment. This allows minimal conductor length for power efficiency while achieving safety separation by positioning the apparatus below the heating tank where hydrogen gas accumulation is less likely.
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 configuration achieves size reduction, enhanced power efficiency, and improved safety by shortening conductors and positioning the power conversion apparatus away from potential hydrogen gas ignition sources.
Implementation Method 1
The cell stack produces hydrogen by electrolyzing water using supplied power
Implementation Method 2
generate power through an electrochemical reaction between hydrogen and an oxidizing agent
Implementation Method 3
a heating tank (5) that includes a housing space (50) housing the cell stack and heats the cell stack
Data Source
AI summary
An electrochemical apparatus includes a cell stack, a power conversion apparatus, a control unit, and a heating tank. The power conversion apparatus is electrically connected to the cell stack. The control unit controls the power conversion apparatus. The heating tank includes a housing space housing the cell stack and heats the cell stack. The cell stack produces hydrogen by electrolyzing water using supplied power, or generates power through an electrochemical reaction between hydrogen and an oxidizing agent. The power conversion apparatus is disposed outside the heating tank, further toward a lower side than the cell stack is. The power conversion apparatus and the cell stack are electrically connected by a conductor that passes through a wall portion of the heating tank. The power conversion apparatus is disposed such that at least a portion thereof overlaps the heating tank when viewed in a vertical direction.