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A fuel cell system energy recovery device

A fuel cell system and energy recovery device technology, applied in fuel cells, steam engine devices, circuits, etc., can solve the problems of low energy utilization rate, less recovered energy, and low integration, so as to improve energy utilization rate and recovery The effect of increasing energy

Active Publication Date: 2022-03-18
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present application provides an energy recovery device for a fuel cell system to solve the problems in the related art that the energy recovery technology for a fuel cell system is performed separately and has a low degree of integration, resulting in less recovered energy and low energy utilization.

Method used

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  • A fuel cell system energy recovery device
  • A fuel cell system energy recovery device
  • A fuel cell system energy recovery device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] see figure 1As shown, Embodiment 1 of the present application provides an energy recovery device for a fuel cell system, the fuel cell system includes a fuel cell 1 and an air compressor 2, and the air compressor 2 is connected to the air inlet of the fuel cell 1 for supplying The fuel cell 1 inputs fresh air for the chemical reaction of the fuel cell 1 to generate electric energy. The recovery device includes an exhaust gas recovery system 3, a waste heat recovery system 4, a transmission system 5, a temperature sensor 6 and a controller. The exhaust gas recovery system 3 includes a turbine 30. The turbine 30 is used to connect with the exhaust port of the fuel cell 1, and is driven by exhaust gas. The turbine 30 works to realize the reuse of exhaust gas; the waste heat recovery system 4 includes a Rankine cycle mechanism 40, and the two ends of the Rankine cycle mechanism 40 are respectively used to connect with the liquid discharge port and the liquid inlet port of t...

Embodiment 2

[0055] see figure 1 As shown, the exhaust gas recovery system 3 also includes a booster pump 31, the two ends of the booster pump 31 are respectively used to connect with the intake port and the exhaust port of the fuel cell 1, and the work of the booster pump 31 is driven by the turbine 30 of. The waste gas discharged from the exhaust port of the fuel cell 1 in this connection can be directly discharged into the booster pump 31, so that the booster pump 31 can recycle most of the waste gas, and only a small part of the waste gas enters the turbine 30 to drive the turbine 30 to work. .

[0056] When the fuel cell system works at a low load, the flow rate of the exhaust gas discharged from the exhaust port of the fuel cell 1 is small, and the exhaust gas discharged from the exhaust port of the fuel cell 1 needs to be inhaled through the booster pump 31, and then the exhaust gas is input into the fuel cell through the air inlet. 1, so the controller controls the transmission 5...

Embodiment 3

[0067] see figure 2 As shown, the air compressor 2 includes a first air compressor 20 and a second air compressor 21 , and the ejector 32 is located between the first air compressor 20 and the second air compressor 21 . The inlet of the second air compressor 21 is connected to the outlet of the booster pump 31 and the ejector 32, and the waste gas inhaled by the booster pump 31 and the ejector 32 is boosted again and input into the fuel cell 1 to realize efficient recovery of energy .

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Abstract

This application relates to a fuel cell system energy recovery device, which relates to the field of fuel cell vehicle energy management, which includes an exhaust gas recovery system, a waste heat recovery system, a transmission system, a temperature sensor and a controller. The exhaust gas recovery system includes a turbine; the waste heat recovery system includes a Lang The Ken cycle mechanism; the transmission system includes the transmission machine and the generator; the temperature sensor is used to detect the temperature of the coolant discharged from the drain port; the controller is used when the fuel cell system is working at a low load and the temperature of the coolant is lower than the preset first When a temperature is reached, the transmission is controlled so that both the turbine and the expander of the Rankine cycle mechanism are disconnected from the generator; when the fuel cell system is operating at a high load, and / or the temperature of the coolant is higher than the preset first temperature , the transmission is controlled so that both the turbine and the expander are connected to the generator and generate electricity. The integration of exhaust gas recovery system and waste heat recovery system effectively improves energy utilization.

Description

technical field [0001] The present application relates to the field of energy management of fuel cell vehicles, in particular to an energy recovery device for a fuel cell system. Background technique [0002] At present, the fuel cell system for vehicles generally includes an air system, a hydrogen system, and a cooling system. Hydrogen is used as fuel, and hydrogen and air are fed into the anode and cathode of the fuel cell for chemical reaction to generate electricity, and air is provided for the fuel cell through an air compressor. The efficiency of the fuel cell system is generally about 50%, and most of the unused energy in the fuel is wasted in the form of heat, such as cooling liquid heat dissipation, exhaust heat dissipation and radiation heat dissipation. [0003] In related technologies, energy recovery technologies for fuel cell systems mainly include turbine recovery technology and Rankine cycle technology, wherein turbine recovery technology refers to adding a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K27/00F01D15/10H01M8/04089H01M8/04111
CPCF01K27/00F01D15/10H01M8/04111H01M8/04097Y02E60/50
Inventor 马义史建鹏张剑李波李学锐
Owner DONGFENG MOTOR CORP HUBEI