Fuel Cell Unit Metallic Bulkhead Noise Isolation
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Solution Overview
Problem
The existing fuel cell units face challenges in downsizing due to physical contact between wire harnesses and power conversion units, and the interference of switching noise on analog data, which affects the reliability and efficiency of the system.
Innovation Solution
A fuel cell unit design that incorporates a metallic bulkhead part to partition the wire harness and power conversion unit, preventing physical contact and absorbing switching noise, allowing for closer placement and downsizing while maintaining data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the wire harness is placed in adjacency to the power conversion unit to downsize the fuel cell unit, then the volume of the fuel cell unit is reduced, but the wire harness may be physically damaged by contact or affected by switching noise
Solution Approach 1:
The interior of the housing is divided into a first space for the power conversion unit and a second space for the wire harness by a bulkhead part, creating physical separation between components that were previously adjacent, thus preventing contact damage while maintaining compact overall volume
Solution Approach 2:
A bulkhead part is introduced as an intermediary structure between the wire harness and power conversion unit, serving as both a physical barrier against contact damage and a grounding path to suppress switching noise interference with analog data
2Reliability
If the wire harness is placed away from the power conversion unit to prevent physical contact and noise interference, then the reliability of the wire harness is improved, but the volume of the fuel cell unit increases
Solution Approach 1:
The housing interior is segmented into distinct spaces for the wire harness and power conversion unit using a bulkhead part, achieving reliable isolation between components while maintaining efficient space utilization and compact overall volume
Solution Approach 2:
The bulkhead part serves multiple functions simultaneously: it acts as a physical partition to prevent contact damage, provides a grounding path to suppress switching noise, and enables compact spatial arrangement of components, thereby achieving reliability without increasing volume
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 bulkhead part effectively prevents physical contact and suppresses switching noise interference, enabling the downsizing of the fuel cell unit while ensuring data reliability and reducing manufacturing costs.
Implementation Method 1
a bulkhead part that is made of metal and is configured to partition the wire harness and the power conversion unit from each other, the bulkhead part being grounded
Implementation Method 2
the bulkhead part being grounded, wherein the wire harness and the power conversion unit are placed next to each other with the bulkhead part interposed therebetween
Data Source
AI summary
The fuel cell unit includes: a fuel cell stack; a cell monitor configured to detect voltage or current of the fuel cell stack; wire harness configured to connect the fuel cell stack and the cell monitor to each other; a power conversion unit configured to include a switching element and to perform conversion of output power of the fuel cell stack or conversion of supplied power to auxiliary machines used for operation of the fuel cell stack by using the switching element; and a bulkhead part that is made of metal and is configured to partition the wire harness and the power conversion unit from each other, the bulkhead part being grounded, wherein the wire harness and the power conversion unit are placed next to each other with the bulkhead part interposed therebetween. Thus, it becomes implementable to downsize the fuel cell unit while satisfying both the prevention of physical contact between the wire harness and the power conversion unit and the suppression of influences of switching noise on analog data.