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Starting method for fuel cell stack in environment below zero

A technology of fuel cell stacks and fuel cell stacks, applied in the direction of fuel cell additives, etc., can solve the problems of increasing system complexity, increasing system energy consumption, reducing system efficiency, etc., achieving simple methods, safe and stable startup, and simplified systems Effect

Active Publication Date: 2016-06-22
国创氢能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this technology is that the implementation of external auxiliary heating increases the complexity of the system, increases the energy consumption of the system, and reduces the efficiency of the system, etc.

Method used

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  • Starting method for fuel cell stack in environment below zero
  • Starting method for fuel cell stack in environment below zero
  • Starting method for fuel cell stack in environment below zero

Examples

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Embodiment Construction

[0019] Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but the embodiment of the present invention is not limited thereto, and its specific working steps are as follows:

[0020] 1). attached figure 1 It is a schematic diagram of the low-temperature start-up process of the fuel cell stack. The experimental device includes a low-temperature test chamber, a fan, a coolant circulation pump, a coolant storage container, and a load.

[0021] 2). The fuel cell stack is composed of 10 single cells, and the area of ​​each single cell is 270cm 2 , the proton exchange membrane is Nafion212, the fuel gas is hydrogen, and the air is provided by a fan.

[0022] 3). Before putting the 10-cell fuel cell stack into the low temperature test box, carry out N 2 Purging and water removal treatment;

[0023] 4).Place the purged fuel cell stack, coolant circulation pump, and coolant storage container in the low-temperature tes...

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PUM

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Abstract

The invention relates to a starting method for a fuel cell stack in an environment below zero. The starting method comprises the following steps of placing the fuel cell stack in a low-temperature environment to be started, carrying out low-current loading and no-load cycle discharging until the temperature of each single cell in the stack reaches above 0 DEG C, loading to a high load, starting a cooling agent circulation pump, and completing the starting of the fuel cell stack. The starting method has the advantages that an auxiliary heating device is not used, heat generated by polarization of the stack during the internal reaction process is fully utilized for automatic heating, and self-starting working of the fuel cell stack in a low-temperature state is completed.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to the low-temperature start-up technology of a fuel cell stack in a subzero environment. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) has the characteristics of high energy conversion efficiency, fast start-up, high specific power, only water as a by-product of the reaction, no pollution, and stable operation. Research hotspots of major automobile groups and oil companies. Due to the presence of reaction product water and humidified water in PEMFC, in an outdoor environment below 0°C, after the battery is turned off or started, the water in the battery will freeze, and the ice layer will hinder the electrochemical reaction process, resulting in Cold start fails, so the start of fuel cells below 0°C is a key problem facing the application of PEMFC in the automotive field. In the prior art, the low-temperature start-up of the fuel cell sta...

Claims

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Application Information

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IPC IPC(8): H01M8/04
CPCY02E60/50
Inventor 郑利民俞红梅侯明艾军邵志刚
Owner 国创氢能科技有限公司
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