PCB Current Collector for Fuel Cell Stack Monitoring
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Solution Overview
Problem
Conventional fuel cell stack collector plates are rigid and lack integration of sensors for real-time monitoring, limiting their adaptability and efficiency in managing thermal and operational conditions.
Innovation Solution
The use of printed circuit boards as current collector plates with integrated sensors, such as thermistors, and electrically conductive tracks for enhanced monitoring and connectivity, allowing for flexible design and modular construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rigid metal collector plates are used, then electrical conductivity and structural strength are ensured, but real-time monitoring capability and thermal management are lacking
Solution Approach 1:
The patent combines multiple functions into a single integrated current collector plate: electrical current collection, temperature monitoring (via thermistors), and structural support. The PCB substrate integrates conductive traces for current collection and mounted sensors for monitoring, eliminating the need for separate rigid metal plates and standalone monitoring components.
Solution Approach 2:
The current collector plate serves multiple purposes simultaneously: it collects electrical current from the fuel cell stack, provides structural support for the stack assembly, and enables real-time temperature monitoring through integrated thermistors. This multi-functional design replaces conventional single-purpose collector plates.
2Ease of manufacture
If separate components are used for current collection and monitoring, then functional clarity is maintained, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent merges current collection traces, sensor mounting structures, and electrical connection points into a single PCB-based current collector plate. This integration reduces the total number of components and simplifies assembly compared to using separate metal collector plates and independently mounted sensors.
Solution Approach 2:
The PCB is designed with distinct functional zones: conductive traces for current collection, mounted thermistors for temperature sensing, and connector tabs for electrical connections. This segmentation of functions within an integrated structure maintains functional clarity while reducing overall system complexity.
3Adaptability or versatility
If rigid metal plates are used for current collection, then electrical conductivity is maximized, but adaptability to different stack configurations is limited
Solution Approach 1:
The patent changes the material parameters of the current collector from traditional rigid metals to PCB materials (substrate with conductive traces). This allows for easier adaptation to different stack configurations while maintaining adequate electrical conductivity through the conductive traces and copper layers on the PCB.
Solution Approach 2:
The PCB-based current collector plate offers greater design flexibility and adaptability to different fuel cell stack configurations compared to rigid metal plates. The PCB can be manufactured in various shapes, sizes, and trace patterns to accommodate different stack arrangements while maintaining electrical performance.
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 solution enables real-time monitoring and improved thermal management, reduces component complexity, and enhances the adaptability of fuel cell stacks to various configurations, making them more efficient and cost-effective.
Implementation Method 1
The sensor may comprise a thermistor or other temperature sensor
Implementation Method 2
the first face includes an electrically conductive layer disposed on a substrate of the printed circuit board
Data Source
Figure 1~2
Figure 3
AI summary
A fuel cell stack assembly has a plurality of cells in a stack configuration. Each cell comprises a membrane-electrode assembly disposed between an anode flow plate and a cathode flow plate. A current collector plate is disposed at each end of the stack and a compression assembly maintains the stack under compression. At least one of the current collector plates is formed as a printed circuit board having a first face disposed against a cathode flow plate or an anode flow plate of an outermost cell in the stack and a second face opposite the first face. The first face includes an electrically conductive layer disposed on a substrate of the printed circuit board to serve as a stack current collector electrode. Electrical components such as temperature sensors can be mounted on the printed circuit board such that they lie in or adjacent to a flow channel extending along an adjacent face of the anode or cathode flow plate. The printed circuit board can provide laterally extending connection tabs for electrical connection to the current collector electrode and to the electrical components.