Methods for operating a fuel cell system and fuel cell system
By diverting excess cathode gas through bypass lines and regulating flow with mass flow control devices, the humidifier's service life is extended and stress is minimized, addressing the issue of high mass flow rates in fuel cell systems.
DE102024212005A1Pending Publication Date: 2026-06-18ROBERT BOSCH GMBH
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Patent Information
- Application Number
- DE102024212005
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Fuel cell systems face challenges in managing high mass flow rates of cathode gas, which can lead to increased stress and reduced service life of the humidifier due to internal leakage and overload.
Method used
Implementing a bypass line in the cathode outlet and utilizing mass flow control devices to divert excess cathode gas, with characteristic values set as maximum permissible mass flow rates or pressure differences, to regulate and limit the cathode gas flow through the humidifier.
Benefits of technology
This approach reduces the load on the humidifier, minimizing the risk of internal leakage and extending its service life by optimizing the cathode gas flow, ensuring precise control and reducing stress on the membrane.
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Abstract
Method for operating a fuel cell system (100) with at least one fuel cell stack (11) and a cathode system (300) in which a cathode supply line (31), a cathode outlet (32) and a humidifier (37) are arranged, wherein the humidifier (37) is connected to the cathode supply line (31) and the cathode outlet (32) in a fluid-permeable manner, wherein at least one means for controlling the mass flow (33, 34) is configured to divert at least a proportionate amount of the mass flow of cathode gas to the humidifier (37) when a characteristic value of the humidifier (37) is exceeded.
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