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Method for activating a fuel cell stack

A technology of fuel cell stack and fuel cell, which is applied in the direction of fuel cells, circuits, electrical components, etc., and can solve the problems of increasing processing time and increasing consumption

Active Publication Date: 2021-03-12
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the time required for activation based on 220 unit cell submodules is about 105 minutes, and the amount of hydrogen used is about 2.9 kg, the processing time is increased and the consumption of hydrogen is increased.

Method used

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  • Method for activating a fuel cell stack
  • Method for activating a fuel cell stack

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Embodiment Construction

[0012] It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein includes motor vehicles in general, including, for example, sport utility vehicles (SUVs), buses, trucks, commercial vehicles of all kinds Passenger vehicles, including boats and boats, watercraft, aircraft, etc., and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen vehicles and other alternative fuel vehicles (for example, fuels obtained from sources other than petroleum). As described herein, a hybrid vehicle is a vehicle that has two or more sources of power at the same time, for example, a vehicle that is both gasoline-powered and electric-powered.

[0013] Although exemplary embodiments are described as using a plurality of units to perform exemplary processes, it should be understood that exemplary processes may also be performed by one or more modules. Additionally, it should be understood that the term "controller / control un...

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Abstract

The present invention relates to a method of activating a fuel cell stack. The method includes supplying oxygen and hydrogen to the cell stack to bring the cell stack into an open circuit voltage (OCV) state after starting an activation process, and terminating the supply of oxygen and hydrogen. Adjacent unit cells in the battery stack are electrically connected through the unit cell voltage sensing terminal plate, and the adjacent unit cells are short-circuited to allow the unit cell voltage to be 0V. In addition, oxygen and hydrogen are supplied to the cell stack again, and a pretreatment process of applying a predetermined current density for a predetermined time is performed. After the open circuit voltage state, by applying a current density exceeding the predetermined current density for a time exceeding the predetermined time, the voltage is reduced to 0V again, thereby removing the oxygen remaining in the battery stack; after removing the residual oxygen, after the predetermined time elapses After the rest period, oxygen and hydrogen are supplied again.

Description

technical field [0001] The present invention relates to a method for activating a fuel cell stack, and more particularly, to a method for quickly reducing the voltage of the stack by using the electrical short circuit phenomenon between adjacent unit cells of the fuel cell, and removing the A method of activating a fuel cell stack with oxygen, thereby reducing processing time and hydrogen consumption. Background technique [0002] Generally, after the fuel cell stack is assembled and manufactured, since the fuel cell stack has low activity in the electrochemical reaction during the initial operation, a treatment process called stack activation is performed to ensure the normal operation of the fuel cell stack to the greatest extent. initial performance. The purpose of activation of a fuel cell called preconditioning or break-in is to activate a catalyst not involved in the reaction, and sufficiently hydrogenate an electrolyte membrane and an electrolyte contained in an elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04223H01M8/04858H01M8/04791
CPCH01M8/04223H01M8/04798H01M8/0488H01M2008/1095H01M8/04225H01M8/04302Y02E60/50
Inventor 李在爀秋炫硕李盛根全大槿申焕秀
Owner HYUNDAI MOTOR CO LTD