A system for pressure management using a differential pressure valve

By adjusting the hydrogen input pressure through a differential pressure valve system, the performance differences between different batches of fuel cells have been resolved, pressure consistency management has been achieved, and the efficiency and promotion potential of fuel cells have been improved.

CN114562679BActive Publication Date: 2025-12-16BEIJING SINOHYTEC
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Patent Information

Application Number
CN202210398026.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-04-16
Publication Date
2025-12-16
Estimated Expiration
2042-04-16

AI Technical Summary

Technical Problem

Different batches of fuel cells have different performance due to inconsistent hydrogen input pressures, and existing technologies make it difficult to achieve consistent pressure management.

Method used

A differential pressure valve system is adopted, including a fuel cell stack, an air compressor, an electronically controlled three-way valve, a stack inlet pressure sensor, an outlet throttle valve, a differential pressure valve, a hydrogen circulation pump, and a hydrogen discharge valve. The differential pressure valve regulates the hydrogen input pressure to achieve dynamic adjustment and consistency management.

Benefits of technology

It achieves performance consistency across different batches of fuel cell products, has a simple system structure, and allows for rapid differential pressure adjustment, thereby increasing the likelihood of widespread adoption of fuel cells.

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Abstract

The application discloses a system for realizing pressure management by using a pressure difference valve, comprising a fuel cell stack, an air compressor, an electrically-controlled three-way valve, an inlet stack pressure sensor, an air outlet throttle valve, a pressure difference valve, a hydrogen circulating pump and a hydrogen discharge valve; the electrically-controlled three-way valve is connected to the air outlet throttle valve after outputting air into the fuel cell stack; the pressure difference valve core pressure input is connected to the throttle valve input pipeline; the pressure difference valve is connected to a high-pressure air source; the pressure difference valve is output to the fuel cell stack; and the other input end of the pressure difference valve is connected to the hydrogen circulating pump. The application realizes dynamic adjustment of hydrogen input pressure by using the pressure difference valve, guarantees the performance consistency of different batches of products, and realizes the adjustment of hydrogen input pressure by using only one pressure difference valve, so that the system structure is simple, the pressure difference adjustment is quick and convenient, and the possibility of popularizing the use of fuel cells is improved.
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