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Fuel cell purging system and purging method thereof

A technology of fuel cells and fuel cell stacks, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of high energy consumption and long purging time, so as to reduce the purging time, reduce energy consumption, improve reliability and The effect of stability

Active Publication Date: 2018-09-18
DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a fuel cell purging system and its purging method to solve the problems of long purging time and high energy consumption in the process of purging the fuel cell in the prior art

Method used

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  • Fuel cell purging system and purging method thereof

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Experimental program
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Embodiment 1

[0056] The purging method of the fuel cell provided in this embodiment is as follows: figure 2 shown, including the following steps:

[0057] 1. After the fuel cell backup power supply system sends a shutdown signal, close the hydrogen intake valve, and the air pump will start to purge the system to meet the first air blowing volume of the rated power of 100w and the speed of 1500RPM, and stop the cooling water pump at the same time. Among them, the first air blowing volume Equal to 1600*P / (F*Vc), P is 50kw, V c It is 0.6v, and F is 96485C / mol.

[0058] 2. Use the battery stack temperature sensor to measure the internal temperature of the fuel cell stack:

[0059] 2.1. When the internal temperature T of the fuel cell stack is ≥ 50°C, judge the purging method according to the measurement data of the sensor group (outlet temperature sensor, outlet pressure sensor, outlet humidity sensor and inlet humidity sensor):

[0060] a. The humidity of the air flowing out of the fuel c...

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Abstract

The invention provides a blowing system and blowing method for a fuel cell. The blowing system comprises a sensor group, an air pump and a system controller, wherein the sensor group comprises a cell stack temperature sensor and an environmental temperature sensor, the cell stack temperature sensor is arranged in a fuel cell stack, and the environmental temperature sensor is arranged outside the fuel cell stack; the air pump is connected to an air inlet pipeline of the fuel cell stack; and the system controller is used for receiving a measuring signal transmitted from the sensor group and controlling the on / off of the air pump according to the measuring signal. By the above blowing system, water in the cell stack can be effectively carried out, and the internal temperature of the fuel cell stack is reduced; the internal temperature of the fuel cell stack and the environmental temperature of the system are measured to judge whether the fuel cell stack is effectively blown or not; and the blowing of the fuel cell stack is stopped according to a judgment result, the blowing time of the fuel cell stack is effectively reduced, the energy consumption of the blowing system is reduced, and the reliability and the stability of the blowing system are improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell stacks, in particular to a fuel cell purging system and a purging method thereof. Background technique [0002] A fuel cell is a power generation device that converts chemical energy in fuel into electrical energy by means of electrochemical reactions. It has the advantages of environmental friendliness, safety, reliability, and ease of operation. Because it is not limited by the Carnot cycle, the direct power generation efficiency of the fuel cell can reach 45%, and the combined heat and power efficiency can reach more than 90%, which can be widely used in many fields such as backup power supply, distributed power station and automobile power. [0003] Among them, the proton exchange membrane fuel cell, as a kind of fuel cell, is equivalent to the reverse device of water electrolysis in principle, and the product of the power generation process is water. Therefore, liquid water often accumulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04119H01M8/04228H01M8/0432H01M8/04701H01M8/04746
CPCH01M8/04179H01M8/04223H01M8/0432H01M8/04701H01M8/04746Y02E60/50
Inventor 张占奎刘煜宋彦彬李云
Owner DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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