Fuel cell system with waterway pressure regulating function

A fuel cell system and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of membrane electrode flooding, reduced battery performance and reliability, damage, etc., and achieve the effect of simple and easy system process.

Inactive Publication Date: 2020-06-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there are bubble points in the permeable plate, if the pressure difference on both sides of the permeable plate is too large and exceeds the bubble point, problems such as air-blocking and water-permeable failure or even damage of the permeable plate will occur; If the difference is too small, the generated water will not be discharged into the cooling water chamber in time, resulting in water flooding of the membrane electrode, which will reduce the performance and reliability of the battery

Method used

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  • Fuel cell system with waterway pressure regulating function
  • Fuel cell system with waterway pressure regulating function
  • Fuel cell system with waterway pressure regulating function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a fuel cell system with water pressure regulation function includes a water tank 6, a high-pressure gas source 14, a gas injection pipeline 8, an exhaust pipeline 9 and a drainage pipeline 10; the water tank 6 is arranged in the cooling water circuit of the fuel cell Among them, a float level gauge 15 is installed in the water tank 6, and the liquid level gauge 15 is connected to the ECU of the fuel cell control system. The exhaust pipeline 9 and the drainage pipeline 10 are relatively independent. The gas injection pipeline 8 is connected to the high-pressure gas source 14 through the gas injection control valve 11. In this embodiment, the high-pressure gas source 14 uses an external high-pressure gas source. The gas control valve 11 is connected to an external high-pressure nitrogen cylinder; the exhaust pipeline 9 is connected to the top of the water tank, and the exhaust pipeline 9 is provided with an exhaust control valve 12, and the drai...

Embodiment 2

[0038] Such as figure 2 As shown, in this embodiment, a fuel cell system with waterway pressure regulation function, the gas injection pipeline 20 is directly connected to the oxidant inlet 4a through the gas injection control valve 22, that is, the oxidant inlet gas with higher pressure is used as the water tank 6 to inject gas The high-pressure gas source; Exhaust pipeline, drainage pipeline are merged into exhaust / water pipeline 21, connect exhaust / water control valve 23, other structures are identical with embodiment 1.

[0039] When the permeable bipolar plate fuel cell stack 1 is running, the ECU of the fuel cell control system monitors in real time the pressure difference P of the permeable plate of the permeable bipolar plate fuel cell stack 1 through the pressure sensor connected to the oxidant and the waterway. This embodiment The normal range of P is 0.2-0.4bar. When the ECU detects that the P value is higher than 0.4bar, and the cooling water channel needs to be ...

Embodiment 3

[0042] Such as image 3 As shown, in this embodiment, a fuel cell system with waterway pressure regulation function, the gas injection pipeline 20 is directly connected to the oxidant inlet 4a through the gas injection control valve 22, that is, the oxidant inlet gas with higher pressure is used as the water tank 6 to inject gas The high-pressure gas source; the exhaust pipeline 30 is directly connected to the intake pipeline of the oxidant inlet 4a through the exhaust control valve 32 and the air pump 31, and the exhaust control valve 32 and the air pump 31 are linked, and other structures are the same as in Embodiment 1.

[0043] Different from Embodiment 1 and Embodiment 2, the exhaust pipeline 30 does not directly discharge the excess gas in the water tank 6, but guides the gas back to the oxidant inlet 4a. Since the gas pressure at the oxidant inlet 4a is higher than the pressure of the water tank 6, an air pump 31 is provided in the exhaust pipeline 30 to increase the ga...

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Abstract

The invention relates to a fuel cell system with a waterway pressure regulating function. The system comprises a water tank, a high-pressure air source, an air injection pipeline, an exhaust pipelineand a drainage pipeline, wherein the water tank is arranged in a cooling waterway of the fuel cell and is connected with an air injection pipeline, an exhaust pipeline and a drainage pipeline which are relatively independent; the air injection pipeline is connected with a high-pressure air source through an air injection control valve; and the air injection control valve, the exhaust control valveand the drainage control valve of the air injection pipeline, the exhaust pipeline and the drainage pipeline are respectively connected with a fuel cell control system. The exhaust pipeline and the drainage pipeline can be combined into an exhaust / drainagepipeline; and the exhaust pipeline can be directly connected with an air inlet pipeline of the fuel cell. The system is simple in structure and easy to implement, is not influenced by the operation pressure of the fuel cell, dynamically adjusts the pressure of the cooling waterway of the fuel cell, further controls the pressure difference between the two sides of a water permeable plate to be always in a reasonable range, protects the water permeable plate from being damaged, and can normally perform water drainage and exhausting.

Description

technical field [0001] The invention belongs to the field of fuel cells, and relates to a permeable bipolar plate fuel cell, in particular to a fuel cell system with a waterway pressure regulating function. Background technique [0002] Fuel cell is an electrochemical reaction device that can directly convert chemical energy in fuel into electrical energy. It has the characteristics of fast start-up speed, high work efficiency, and environmental protection. It has become one of the research hotspots in the field of new energy in recent years. [0003] The water-permeable bipolar plate fuel cell is a kind of fuel cell. It uses the water-permeable and gas-blocking characteristics of the water-permeable plate to discharge the liquid water in the battery through the water-permeable plate into the coolant cavity, and then discharges the battery. Water-permeable bipolar plate fuel cells have the functions of humidification, drainage, and heat dissipation. They were first applied t...

Claims

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Application Information

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IPC IPC(8): H01M8/04746
CPCH01M8/04753H01M8/04776Y02E60/50
Inventor 耿江涛陈中岩邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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