Fuel Cell Housing Layout to Isolate Hydrogen From Auxiliaries

Solution Overview

Problem

Existing fuel cell systems face challenges in managing hydrogen leakage in the auxiliary machine section, leading to increased complexity and cost due to the need for explosion-proof structures and ventilation systems.

Innovation Solution

A fuel cell system design that includes a housing with separate sections for the fuel cell module and the auxiliary machine, where the hydrogen flow passage is connected to an external hydrogen flow passage on a wall different from the partition wall, facilitating measures against hydrogen leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a pipe through which hydrogen flows through the auxiliary machine section is provided, then hydrogen supply to the fuel cell stack is enabled, but hydrogen leakage risk increases and requires explosion-proof structures or ventilation systems

Engineering Contradiction:

Improvehydrogen supply reliabilityVSAvoidhydrogen leakage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The housing is divided into a first section containing the fuel cell module and hydrogen flow passage, and a second section containing the auxiliary machine, separated by a partition wall. This segmentation isolates hydrogen from the auxiliary machine section, eliminating hydrogen leakage risks in that area while maintaining reliable hydrogen supply to the fuel cell stack through the dedicated hydrogen flow passage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hydrogen flow passage is extracted from the auxiliary machine section and placed in a separate first section. The connection part is positioned on a wall different from the partition wall, allowing hydrogen to be supplied to the fuel cell stack without passing through the auxiliary machine section. This extraction eliminates the need for explosion-proof structures or ventilation systems in the auxiliary machine section.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If explosion-proof structures or ventilation systems are added to the auxiliary machine section, then hydrogen leakage safety is improved, but device complexity and cost increase

Engineering Contradiction:

Improvehydrogen leakage safetyVSAvoidsystem structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The hydrogen flow passage is extracted from the auxiliary machine section and placed in a separate first section. The connection part is positioned on a wall different from the partition wall, allowing hydrogen to be supplied to the fuel cell stack without passing through the auxiliary machine section. This extraction eliminates the need for explosion-proof structures or ventilation systems in the auxiliary machine section, thereby reducing device complexity and cost.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The partition wall that separates the two sections is designed with a connection part that allows hydrogen to pass from the first section to the external environment without entering the auxiliary machine section. This design converts the potential harm of hydrogen leakage into a controlled benefit by directing hydrogen flow away from the auxiliary machine section, eliminating the need for additional safety devices.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Area of stationary object

If the connection part is disposed on the partition wall, then space utilization is improved, but hydrogen leakage risk in the auxiliary machine section increases

Engineering Contradiction:

Improvespace utilizationVSAvoidhydrogen leakage risk

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The connection part is asymmetrically positioned on a wall different from the partition wall. This asymmetric positioning ensures that hydrogen flows from the first section to the external environment without passing through the auxiliary machine section, eliminating hydrogen leakage risks while maintaining efficient space utilization through optimized layout design.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The connection part is extracted from the partition wall and positioned on a different wall. This extraction allows hydrogen to be supplied to the fuel cell stack without passing through the auxiliary machine section, eliminating the need for explosion-proof structures or ventilation systems in the auxiliary machine section while maintaining efficient space utilization.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250038226A1Fuel Cell System

Publication Date: 2025.01.30 YANMAR HLDG CO LTD

AI summary

An exemplary fuel cell system includes a housing including a first section in which a fuel cell module and a hydrogen flow passage are disposed and a second section which is adjacent to the first section and in which an auxiliary machine is disposed. The housing has a connection part between the hydrogen flow passage and an external hydrogen flow passage disposed outside the housing, on a wall different from a partition wall sectioning the first section and the second section among walls constituting the first section.