Two-dimensional cell voltage monitoring 2D-CVM

The monitoring device addresses the challenge of measuring voltage differences in fuel cells by providing external, adjustable contact pins and circuits for precise, non-invasive monitoring, enhancing fault detection and quality control in fuel cell systems.

DE102024200809A1Pending Publication Date: 2025-07-31ROBERT BOSCH GMBH
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Patent Information

Application Number
DE102024200809
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-30
Publication Date
2025-07-31

AI Technical Summary

Technical Problem

Existing fuel cell systems face challenges in accurately measuring and investigating voltage differences along fuel cells due to issues like flooding, requiring internal intervention and potentially disrupting the electrical conditions within the cell.

Method used

A monitoring device with contact pins and an electrical circuit for measuring voltage differences externally on the edge regions of fuel cell end plates and bipolar plates, allowing for one- to two-dimensional stress measurements without altering the cell's internal conditions, and enabling adjustable contact pins for different geometries and sizes.

Benefits of technology

Enables accurate, non-invasive monitoring of fuel cell operation and quality assessment by detecting small voltage differences, facilitating fault detection and quality control without disturbing the force distribution within the fuel cell stack.

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Abstract

The invention relates to a monitoring device (100), in particular a cell voltage monitoring device, for a fuel cell (FC) of a fuel cell stack (FCS) for detecting at least one electrical operating parameter, in particular a cell voltage (U), of the fuel cell (FC), comprising: - a support unit (10) for supporting and / or bracing contact pins (20) on an edge region of an end plate and / or a bipolar plate of the fuel cell (FC) from outside the fuel cell (FC), - a plurality of contact pins (20) for electrically contacting the end plate and / or the bipolar plate along the edge region, and - an electrical circuit (30) for measuring and / or evaluating operating parameter differences, in particular voltage differences (ΔU), at a plurality of pairs of contact pins (20).
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