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A method and device for low-temperature start of the fuel battery

A fuel cell, low temperature technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the problems of long startup time and difficult control, and achieve the effects of rapid startup, low operating cost, and good feasibility

Active Publication Date: 2008-04-30
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different performance of each single battery, the voltage across the "weaker" single battery will exceed 0.4 volts, so it is difficult to control, and because the battery and battery temperature are different each time it is started, the starting time may sometimes be longer

Method used

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  • A method and device for low-temperature start of the fuel battery
  • A method and device for low-temperature start of the fuel battery
  • A method and device for low-temperature start of the fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The fuel cell is composed of 5 single cells, the activation area of ​​each cell is 128 square centimeters, and the proton exchange membrane is Nafion112. The fuel gas is pure hydrogen, and the oxygen is provided by the blower.

[0044] The fuel cell passes through N before parking 2 Gas purge.

[0045] Measure the temperature inside the battery with a platinum resistance thermometer.

[0046] The fuel cell starts at minus 20 degrees, the hydrogen control valve is opened, and the hydrogen flow meets the current density of 500 mA per square centimeter; the bidirectional switch controller is connected to the DC power supply, and the current and voltage controllers are adjusted so that the current density passing through the battery is 500 Milliamperes per square centimeter; turn on the fan to adjust the air volume so that the oxygen meets the oxygen required by the current density of 500 milliamperes per square centimeter.

[0047] After the internal temperature of the ...

Embodiment 2

[0052] The fuel cell is 10 single cells, the activation area of ​​the single cell is 25 square centimeters, and the proton exchange membrane is Nafion112. The fuel gas is pure hydrogen, and the oxygen is provided by the blower.

[0053] The fuel cell passes through N before parking 2 Gas purge.

[0054] The temperature sensor measures the temperature inside the battery.

[0055] Start under the environmental condition of minus 20 degrees, open the hydrogen control valve, the hydrogen flow rate meets the current density of 400 mA per square centimeter; the bidirectional switch controller connects the DC power supply, adjusts the current and voltage controllers, so that the current density passing through the battery is 400 mA per square centimeter; turn on the fan to adjust the air volume so that the oxygen meets the oxygen required by the current density of 400 mA per square centimeter.

[0056] The voltage at both ends of the battery gradually changes from negative to posi...

Embodiment 3

[0059] The fuel cell is a single cell, the activation area of ​​the single cell is 25 square centimeters, and the proton exchange membrane is Nafion112. The fuel gas is pure hydrogen, and the oxygen is pure oxygen.

[0060] Before the fuel cell is placed in a low temperature environment, the N 2 Gas purge.

[0061] The temperature sensor measures the temperature inside the battery.

[0062] Start under the environmental conditions of minus 15 degrees, open the hydrogen control valve, and the hydrogen flow rate meets the current density of 400 mA per square centimeter; the bidirectional switch controller is connected to the DC power supply, and the current and voltage controllers are adjusted so that the current density passing through the battery is 400 milliamperes per square centimeter; oxygen meets the oxygen required for the current density of 400 milliamperes per square centimeter.

[0063] The voltage at both ends of the battery gradually changes from negative to posi...

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PUM

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Abstract

The invention relates to a quick start method for a fuel cell at low temperature, a direct-current power supply (an accumulator or a capacitance) is connected with a fuel cell in series, and a two-way on / off controller can select the fuel cell to be connected with a load or the direct-current power supply. When the fuel cell is switched on at low temperature, the fuel cell is connected with the direct-current power supply, the hydrogen gas and the air are separately insufflated into an anode and a cathode, and a regulating electric current and a voltage controller make a certain current pass the fuel cell. Through hydrogen pump action, the hydrogen gas is generated at cathode, the hydrogen gas is reacted with the oxygen in air to release heat, so as to make the membrane electrode speedily increase temperature to reach the fuel cell operating temperature with normal switch. The method promotes application of the fuel cell, particularly the application on communications and transportation.

Description

Technical field [0001] The present invention relates to a fuel cell system and its low-temperature rapid start, and specifically to a method and device that can enable a fuel cell to quickly start at low temperature. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy. Proton exchange membrane fuel cell (PEMFC) has many advantages such as no pollution, low noise, fast start-up, high power density, high efficiency and long life. Therefore, it has broad application prospects in transportation. The inner core of a fuel cell device is the membrane electrode. At the anode end of the membrane electrode, the fuel can pass through the porous material and undergo an electrochemical reaction on the surface of the catalyst, losing electrons and becoming positively charged ions. The positive ions can migrate through the proton exchange membrane to reach The other end of the mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/00H01M8/04225
CPCY02E60/50
Inventor 俞红梅王洪卫孙树成侯俊波明平文衣宝廉
Owner SUNRISE POWER CO LTD
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