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. 26, 2012
Filed:
Jan. 29, 2010
Ju-hyun Kang, Daejeon, KR;
Dal-hoon Lee, Daejeon, KR;
Jee-ho Kim, Daejeon, KR;
Sang-hoon Lee, Daejeon, KR;
Dong-keun Kwon, Daejeon, KR;
Ju-Hyun Kang, Daejeon, KR;
Dal-Hoon Lee, Daejeon, KR;
Jee-Ho Kim, Daejeon, KR;
Sang-Hoon Lee, Daejeon, KR;
Dong-Keun Kwon, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
An apparatus for sensing a leakage current of a battery comprises a floating capacitor charged with a voltage detected from a cathode or anode terminal of a battery; a terminal selection switching unit for selecting a voltage detection path for the cathode or anode terminal; a charge switching unit for charging the floating capacitor with a detection voltage of the cathode or anode terminal, detected through the selected voltage detection path; a polarity reverse switching unit for reversing a polarity of the detection voltage of the anode terminal charged to the floating capacitor; and a leakage current determining unit for sensing the detection voltage of the cathode terminal charged to the floating capacitor and the polarity-reversed detection voltage of the anode terminal charged to the floating capacitor to calculate a leakage resistance, and comparing the calculated leakage resistance with a criterion insulation resistance to determine whether a leakage current occurs.