Fuel Cell Heating Unit with Detachable Heat Generating Part
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Solution Overview
Problem
Existing fuel cell heating units are costly and time-consuming to replace, requiring disassembly of the cell stack and affecting maintenance efficiency and performance.
Innovation Solution
A fuel cell design with a heating unit that includes a heat-generating part and a support part allowing easy fitting and removal, integrated with end plates or current collectors, and featuring a planar heating element connected to a power source, with a detachable cover and heat conduction parts for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the heating unit is integrated into the cell stack structure, then heating efficiency is improved, but replacement complexity and time increase
Solution Approach 1:
The heating unit is divided into separate functional components: a heat-generating part (heating element) and a heat-generating-part support part with integrated cooling channels. This segmentation allows the heating element to be independently replaced without affecting the support structure or cell stack, resolving the contradiction between integrated heating efficiency and ease of replacement.
Solution Approach 2:
The heat-generating part is extracted as a separate, removable component from the support part. The support part remains fixed and integrated with the cell stack, while the heating element can be easily removed and replaced through access openings in the end plates, maintaining both heating efficiency and replacement ease.
2Stability of the object's composition
If the heating unit requires disassembly of cell stack for replacement, then structural integrity is maintained, but maintenance time and labor cost increase
Solution Approach 1:
Access openings are pre-provided in the end plates for removing and installing the heating element. The support part is pre-configured with cooling channels and mounting structures that remain fixed during replacement. This preliminary preparation allows maintenance personnel to quickly replace the heating element without disassembling the cell stack, reducing maintenance time while preserving structural integrity.
3Ease of repair
If the heating unit is designed for easy replacement, then maintenance cost decreases, but heating performance may be compromised
Solution Approach 1:
The heat-generating part is merged with the support part that contains integrated cooling channels and thermal management features. This combination ensures optimal thermal contact and heat distribution while maintaining the ability to easily replace the heating element. The merged design preserves heating performance through proper thermal coupling while allowing cost-effective maintenance.
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
Enables quick and cost-effective replacement of heating units without disassembling the cell stack, reducing maintenance time and labor, while enhancing heating efficiency and vehicle startup speed.
Implementation Method 1
a heat-generating part (510B, 510C) and a heat-generating-part support part (520B, 520C) disposed on an end side of the cell stack (122). The heat-generating part (510B, 510C) may include a planar heating element, connected to the power connection part (530B), which generates heat in response to the driving power source
Implementation Method 2
The heating unit (500B, 500C) may further include a heat conduction part (560B) configured to conduct heat from the heat-generating part (510B, 510C) to a periphery of the heat-generating part (510B, 510C)
Data Source
AI summary
A fuel cell includes a cell stack including a plurality of stacked unit cells and a heating unit configured to apply heat to the cell stack. The heating unit includes a heat-generating part and a heat-generating-part support part disposed on an end side of the cell stack. The heat-generating-part support part allows the heat-generating part to be fitted thereinto or to be drawn out therefrom.