Bionic Leaf-Vein Fuel Cell Stack for Uniform Air Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current air-cooled fuel cell modules suffer from uneven gas diffusion, poor gas exchange, poor drainage performance, and low power output due to their open structure and reliance on heat convection, which limits their application in specialized platforms requiring high power and efficiency.
Innovation Solution
A leaf vein flow channel bionic air-cooled fuel cell module with a cylindrical closed structure, featuring a mesh vein distribution pattern on the cathode surface and a banana leaf-inspired design on the anode surface, utilizing an impeller for active air intake that mimics lung patterns to enhance air flow and diffusion, and a capillary effect for efficient water discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If open structure with fan-based air supply is used, then structure simplicity and cost reduction are achieved, but gas diffusion uniformity and power output are poor
Solution Approach 1:
The air supply system is segmented into multiple independent channels corresponding to different regions of the fuel cell stack. Each channel has dedicated flow paths and control mechanisms, allowing independent optimization of air distribution to different cell groups, thereby improving overall power output while maintaining reasonable structural complexity
Solution Approach 2:
The patent transitions from two-dimensional planar flow channels to three-dimensional spatial flow channels. The air supply system utilizes vertical and radial dimensions to create multi-level flow paths, enabling better air distribution across the stack surface and improving gas diffusion uniformity without significantly increasing structural complexity
2Device complexity
If open structure with free convection is used, then device complexity is reduced, but gas exchange efficiency and drainage performance deteriorate
Solution Approach 1:
The patent introduces pneumatic principles by using pressurized air supply systems with controlled flow rates. The air intake system incorporates pressure regulation mechanisms and flow control devices that enable active management of air delivery, significantly improving gas exchange efficiency while adding only moderate complexity to the overall device
Solution Approach 2:
The air supply system is designed with dynamic adjustment capabilities, allowing flow rates and pressure to be varied based on operating conditions. The system can adaptively respond to changes in load and temperature, optimizing gas exchange efficiency across different operational states without requiring overly complex control mechanisms
3Ease of operation
If square stack structure is used, then ease of stacking and placement is improved, but adaptability to specialized platforms deteriorates
Solution Approach 1:
The patent adopts a cylindrical stack structure instead of the conventional square design. This curved geometry provides superior adaptability to specialized platforms such as drones and submersibles where space constraints and aerodynamic considerations are critical. The cylindrical form factor maintains ease of stacking while dramatically improving versatility across different application platforms
4Ease of manufacture
If uniform flow channels are used, then manufacturing simplicity is maintained, but gas diffusion uniformity and heat dissipation performance are poor
Solution Approach 1:
The flow channel design implements local quality variations with different channel dimensions, shapes, and flow rates in different regions of the stack. Areas with higher heat generation or lower oxygen concentration receive optimized flow paths with increased air supply, while other regions have appropriately scaled channels. This non-uniform design significantly improves gas diffusion uniformity and heat dissipation performance while remaining manufacturable using standard fabrication techniques
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 solution provides even gas diffusion and heat dissipation, increases power density, and prevents flooding, making it suitable for columnar structures like drones and submersibles while reducing parasitic energy consumption.
Implementation Method 1
the air is compressed at the air inlet to obtain a greater flow rate for flowing through the fuel cell module
Implementation Method 2
the motor drives the impeller to rotate, and the impeller provides additional power to the air, such that volume expansion of the air is accelerated
Implementation Method 3
the air is evenly diffused in the cathode flow channel network while being diffused to the cathode diffusion layer
Implementation Method 4
a capillary effect for efficient water discharge
Implementation Method 5
air-cooled fuel cell modules are the earliest type of fuel cell modules developed
Implementation Method 6
use fans to supply air to the cell modules while discharging the heat inside the fuel cell modules
Data Source
AI summary
Disclosed are a leaf vein flow channel bionic air-cooled fuel cell module supporting lung air intake, and a method thereof. A circular columnar stack is arranged in a cylindrical impeller and is placed in a cylindrical sealing volute, such that the circular columnar stack is suitable for the cylindrical body structure of drones and unmanned submersibles. A cathode surface and an anode surface are integrated on a same bipolar plate. The cathode surface adopts a mesh vein distribution pattern imitating veins of a lotus leaf, and the anode surface adopts a distribution pattern imitating veins of a banana leaf. In this way, even diffusion of gas is facilitated, and gas reaction is even. In addition, parasitic power consumed by a motor driving an impeller is small.