Fuel Cell Interconnect Structure for Drive Specification Compatibility
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Solution Overview
Problem
The design and manufacture of fuel cell vehicle systems are complicated due to differences in wire harness length required for left-hand drive and right-hand drive specifications to avoid LC resonance when connecting fuel cell converters and secondary battery converters via wire harness.
Innovation Solution
An electric interconnect structure where the first and second DC-DC converters are positioned such that the wire harnesses for left-hand and right-hand drive specifications are equal in length, with connectors and clamps strategically placed to maintain consistent tension and electrical connection stability, simplifying design and manufacture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire harness length is adjusted to avoid LC resonance for different drive specifications, then the electrical connection stability is improved, but the design and manufacture complexity increases
Solution Approach 1:
The patent applies asymmetry by placing the first converter's connector on a specific side (left or right) and positioning the second converter on opposite sides for left-hand and right-hand drive specifications. This asymmetric arrangement ensures that wire harnesses of equal length can be used for both specifications while maintaining proper electrical connections and avoiding LC resonance, thereby improving reliability without increasing complexity
Solution Approach 2:
The patent changes the positional parameter of the second converter between left-hand and right-hand drive specifications, placing it on opposite sides of the center line. This parameter change allows the wire harness length to remain constant across different specifications while maintaining electrical connection stability, thus improving reliability without increasing design and manufacture complexity
2Reliability
If different wire harness lengths are used for left-hand and right-hand drive specifications, then the LC resonance is avoided, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent achieves universality by designing the wire harness with equal length for both left-hand and right-hand drive specifications. The connector positioning and converter arrangement are designed to work universally across different specifications, allowing a single wire harness design to serve multiple functions and configurations, thereby improving LC resonance avoidance while maintaining ease of manufacture
Solution Approach 2:
The patent uses asymmetry in connector placement to enable the same wire harness length to work for both specifications. By placing connectors on specific sides and positioning converters appropriately, the design achieves asymmetric compatibility that allows universal wire harness application while maintaining proper electrical connections and avoiding LC resonance
Data Source
AI summary
A fuel cell vehicle has both left-hand drive specifications and right-hand drive specifications. A first converter is placed at a same position whichever of the left-hand drive specifications or the right-hand drive specifications are applied. A second converter is placed on a selected one of the left-hand side and the right-hand side of the center line of the fuel cell vehicle for the left-hand drive specifications, while, for the right-hand drive specifications, placed on the other side of the center line of the fuel cell vehicle opposite to the selected one side for the left-hand drive specifications. A first wire harness to be used as the wire harness for the left-hand drive specifications and a second wire harness to be used as the wire harness for the right-hand drive specifications are equal in length to each other.