Low-temperature cold-start fuel cell system and use method therefor

A fuel cell system and fuel cell technology, used in the field of low temperature cold start of fuel cells and fuel cells, can solve the problems of stack leakage, permanent burnout of membrane electrodes, irreversible damage of membrane electrodes, etc.

Active Publication Date: 2016-03-09
BEIJING NOWOGEN TECH CO LTD
View PDF5 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main product of the fuel cell is water. During each operation and at the end of the operation, there will be water in the cathode and anode. If the shutdown temperature is below 0°C, it will cause freezing, and the catalyst and protons on the membrane electrode will exchange. The membrane is covered, which affects its starting reaction performance. If the freezing is severe, the reaction will not occur at all, and even cause irreversible damage to the membrane electrode.
[0003] In order to quickly start the proton exchange membrane fuel cell in a low temperature environment, various low temperature cold start measures have been proposed. In the patent US6764780B2, the method of running the fuel cell under anoxic loading is adopted. This method increases the temperature of the fuel cell by increasing the internal resistance of the fuel cell. , although this method is simple, it is difficult to control. It is easy to cause the problem of voltage reversal of the fuel cell, and it is easy to cause permanent burnout of the membrane electrode due to improper loading.
Patent CN201320253808.1 adopts the method of inserting a heating plate inside the fuel cell. Although this method is convenient for control, it is very easy to cause a short circuit, and this method needs to process a special installation groove for installing the membrane electrode, which may easily lead to leakage of the stack

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-temperature cold-start fuel cell system and use method therefor
  • Low-temperature cold-start fuel cell system and use method therefor
  • Low-temperature cold-start fuel cell system and use method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment is a comparative example. The above liquid-cooled proton exchange membrane fuel cell is used. After the last startup is completed, the cathode circuit 7 and the anode circuit 8 are purged with inert gas nitrogen until it contains a small amount of water. The start-up temperature is -10℃, and the normal start-up temperature is 5℃. The fuel cell adopts figure 1 Connection shown. Taking electric heating as an example, it requires 374kJ of energy to heat the stack only by heating the coolant, that is, heating the cooling inlet pipe 16 to cold start the fuel cell. If a 600W electric heater is used, regardless of energy loss and heat loss, the system needs to be heated for at least 10 minutes to reach the start-up temperature of 5°C, and then 0.1A / cm 2 When the current density is added to the electric terminal load, it reaches 25°C in about 3.5 minutes, and the fuel cell starts at -10°C, and it takes about 23.5 minutes to reach full power operating conditions....

Embodiment 2

[0028] This embodiment uses the above-mentioned liquid-cooled stack, the startup temperature is -10°C, and the normal startup temperature is raised to 5°C. The fuel cell uses figure 2 Connection shown. The electric heating method is adopted to heat the stack only by heating the cathode and anode gas, that is, heating the anode inlet pipe 14 and the cathode inlet pipe 15 to cold start the fuel cell. To correspond to 0.1A / cm 2 Take the current density gas flow as an example, the anode heating power is 50W, and the cathode heating power is 250W. Considering the redundancy of heat dissipation and energy loss, the gas entering the system at -10 degrees is heated to 60 degrees C, and the two heaters are uniformly controlled. When the heated air flow is passed into the stack, the rate is 0.1A / cm 2 The current density adds the load of the electric terminal. At this time, the power generation of the stack is about 1.5kW, and the heat generation is 1.5kJ / s, the system can reach the start...

Embodiment 3

[0030] This embodiment is a preferred example. The above-mentioned liquid-cooled stack is used, the startup temperature is -10°C, and the normal startup temperature is 5°C. The fuel cell uses figure 2 Connection shown. The electric heating method is adopted to heat the stack by heating the coolant, the cathode and the anode gas, that is, the anode inlet pipe 14, the cathode inlet pipe 15, and the cooling inlet pipe 16 are heated at the same time, so as to cold start the fuel cell. To correspond to 0.1A / cm 2 Take the gas flow of current density as an example. The anode heating power is 50W, the cathode heating power is 250W, and the cooling heating power is 600W. Considering the redundancy of heat dissipation and energy loss, the gas entering the system at -10 degrees is heated to 60 degrees C while heating the coolant. , The three heaters are controlled separately. When the heated air flow is passed into the stack, the rate is 0.1A / cm 2 The current density adds the load of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a low-temperature cold-start fuel cell system. The system comprises a fuel cell system, a low-temperature cold-start heating apparatus, a fuel cell control system and a power utilization terminal. The fuel cell system is connected with the low-temperature cold-start heating apparatus, the fuel cell control system and the power utilization terminal. The fuel cell control system comprises a control board and a control power supply. The system not only can accelerate low-temperature cold start of a fuel cell but also ensures safety use of an electric pile and avoids destruction of a core component, namely, a membrane electrode of the electric pile; and meanwhile, a mode is convenient to operate and control.

Description

Technical field [0001] The invention relates to the field of fuel cells, in particular to the field of low-temperature cold start of fuel cells. Background technique [0002] At present, the proton exchange membrane fuel cell is a power generation device that converts chemical energy into electrical energy. Its core element membrane electrode can effectively conduct ions at -20°C, laying the foundation for low-temperature power generation by the fuel cell. However, the main product of a fuel cell is water. During and after each operation, there will be water at the cathode and anode. If the shutdown temperature is below 0°C, it will cause freezing and exchange of catalysts and protons on the membrane electrodes. The membrane is covered, which affects its start-up reaction performance. If it freezes severely, it will not react at all, and even cause irreversible damage to the membrane electrode. [0003] In order to quickly start the proton exchange membrane fuel cell in a low temp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04029H01M8/10
CPCH01M8/04037H01M8/04074Y02E60/50H01M8/04268H01M2008/1095
Inventor 赖平化张苹朱俊娥欧阳洵
Owner BEIJING NOWOGEN TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap