Fuel Cell Stack Mounting Layout for Lower Power Unit Height
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Solution Overview
Problem
Existing vehicle installation structures for fuel cell stacks constrain stylistic design freedom and increase the height of the power unit compartment by positioning the fuel cell further above the drive motor, limiting design flexibility.
Innovation Solution
A vehicle installation structure that elastically supports the fuel cell stack and drive motor via vibration isolating members, positioning the drive motor between the upper and lower ends of the fuel cell stack, and using a framework member at the vehicle's lower side to maintain the power unit compartment's height while allowing for separate and flexible positioning of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel cell stack is disposed further toward the vehicle upper side than the upper end of the drive motor, then the fuel cell stack can be adequately supported, but the overall height of the power unit compartment increases
Solution Approach 1:
The patent transitions from vertical stacking (fuel cell above motor) to horizontal/overlapping arrangement where the drive motor is positioned between the upper and lower ends of the fuel cell stack in the height direction. This dimensional reconfiguration allows both components to coexist within the same vertical envelope, reducing the overall power unit compartment height while maintaining adequate support for the fuel cell stack through the vibration isolating members.
2Ease of manufacture
If the fuel cell stack is disposed further toward the vehicle upper side, then component support is simplified, but the degrees of freedom for stylistic design are constrained
Solution Approach 1:
The patent employs vibration isolating members that provide elastic support, allowing dynamic adjustment and optimization of component positions. The drive motor can be positioned at various height positions between the upper and lower ends of the fuel cell stack, enabling flexible stylistic design while maintaining reliable vibration isolation and support. This dynamic positioning capability enhances design freedom without compromising manufacturing simplicity.
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 enhances stylistic design freedom by reducing the power unit compartment's height and improving vibration support rigidity, while maintaining the vehicle's balance and ride comfort by lowering the center of gravity.
Implementation Method 1
a fuel cell stack that is disposed at a vehicle front section or a vehicle rear section, and that is elastically supported by the framework member via a vibration isolating member
Implementation Method 2
a drive motor that is disposed at a same section of the vehicle front section or the vehicle rear section as the fuel cell stack, that is separate from the fuel cell stack, and that is elastically supported by the framework member via a second vibration isolating member
Data Source
AI summary
A vehicle installation structure for a fuel cell stack that includes: a framework member disposed at a vehicle lower side; a fuel cell stack that is disposed at a vehicle front section or a vehicle rear section, and that is elastically supported by the framework member via a vibration isolating member; and a drive motor that is disposed at a same section of the vehicle front section or the vehicle rear section as the fuel cell stack, that is separate from the fuel cell stack, and that is elastically supported by the framework member via a vibration isolating member such that a height position of at least one of an upper end, a lower end, or a height direction center of the drive motor is disposed between a height position of an upper end and a height position of a lower end of the fuel cell stack.