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:
Jun. 18, 2013
Filed:
Oct. 19, 2010
Chang-gi Jung, Daejeon, KR;
Ju-young Kim, Daejeon, KR;
Jung-soo Kang, Daejeon, KR;
Cheol-taek Kim, Daejeon, KR;
Do-youn Kim, Daejeon, KR;
Chang-Gi Jung, Daejeon, KR;
Ju-Young Kim, Daejeon, KR;
Jung-Soo Kang, Daejeon, KR;
Cheol-Taek Kim, Daejeon, KR;
Do-Youn Kim, Daejeon, KR;
LG Chem., Ltd., Seoul, KR;
Abstract
Disclosed is a relay control apparatus and method for electric drive vehicles. The apparatus controls turn-off of a relay operative to connect an electric drive unit with a battery pack for supplying electrical power to the electric drive unit, and comprises a current sensor for measuring and outputting a residual current flowing between the battery pack and the electric drive unit; and a controller for, in a situation requiring turn-off of the relay, receiving the measured residual current value, comparing the measured residual current value with a reference value for the residual current, and controlling to maintain the ON-state of the relay or to turn off the relay on the basis of the comparison results. Accordingly, it prevents a relay of electric drive vehicles from being damaged due to over-current such as a surge current, at the time of turning off the relay.