Method of determining the current density distribution in a stack of fuel cells using a magnetotomography process

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This patent describes a method for determining the distribution of current density within a stack of fuel cells by using a magnetotomography process. It involves placing magnetic field sensors around the fuel cell stack to measure magnetic fields generated by current flows. The method includes special consideration for the arrangement of current feed and return lines, particularly when these lines cannot be placed in parallel.

Use CasesContent extracted from patent full text and abstract with AI.

• Monitoring and diagnosing the performance of fuel cell stacks in electric vehicles
• Quality control and maintenance of stationary fuel cell power systems
• Optimization of fuel cell stack design and operation in research and development settings
• Real-time analysis of current distribution for improving fuel cell efficiency
• Detection of faults or irregularities in fuel cell stacks

BenefitsContent extracted from patent full text and abstract with AI.

• Provides a non-invasive and precise way to measure current density distribution in fuel cell stacks
• Enhances the ability to detect and diagnose faults or inefficiencies within the fuel cell system
• Can improve the performance and reliability of fuel cell systems by enabling better control and optimization
• Supports maintenance and quality assurance by offering detailed internal current information
• Facilitates the development of more efficient and robust fuel cell designs

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Patent Abstract

The method involves using magnetic field sensors (35) which measures values of a magnetic field (30) generated by the current flow (20) in the fuel cell stack (10). A feed line and return line are provided for the cell stack current and these are arranged in parallel to the extent possible. Those sections where it is not possible or sensible to arrange the lines in parallel are taken into account partly or completely in a reconstruction volume for the current density distribution.