The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2005
Filed:
Dec. 06, 2002
IN Hwan OH, Seoul, KR;
Jae Jun Ko, Kyungki-Do, KR;
Heung Yong Ha, Seoul, KR;
Seong-ahn Hong, Seoul, KR;
Tae Won Lim, Seoul, KR;
Ki Chun Lee, Kyungki-Do, KR;
Soo Whan Kim, Kyungki-Do, KR;
Jong Hyun Lee, Kyungki-Do, KR;
In Hwan Oh, Seoul, KR;
Jae Jun Ko, Kyungki-Do, KR;
Heung Yong Ha, Seoul, KR;
Seong-Ahn Hong, Seoul, KR;
Tae Won Lim, Seoul, KR;
Ki Chun Lee, Kyungki-Do, KR;
Soo Whan Kim, Kyungki-Do, KR;
Jong Hyun Lee, Kyungki-Do, KR;
Hyundai Motor Company, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
A method for operating a polymer electrolyte membrane fuel cell at temperatures below the freezing point of water and an apparatus thereof are provided to prevent damage and performance degradation of the membrane-electrode assemblies. Non-humidified gas flows for several seconds before temperature of the polymer electrolyte membrane fuel cell falls below the freezing temperature of water when operation of the polymer electrolyte membrane fuel cell stops. Simultaneously, anode of the polymer electrolyte membrane fuel cell is filled with a solution having a low freezing point to prevent the temperature of a polymer electrolyte membrane fuel cell falling below the freezing point of water due to the lower ambient temperature in the winter. When the polymer electrolyte membrane fuel cell is restarted, the cell performance is not degraded reflecting that the present invention stably preserves the fuel cell.