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:
Sep. 11, 2018
Filed:
Dec. 28, 2012
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Yuji Yoshioka, Hitachinaka, JP;
Tsuyoshi Kai, Hitachinaka, JP;
Akihiko Kudo, Hitachinaka, JP;
Masahiro Ueda, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A leak detection device includes a pulse signal outputting portion that outputs predetermined pulse signals to a positive connecting wire connected to a positive side of a battery and a negative connecting wire connected to a negative side of the battery. A response waveform detecting portion of the leak detection device detects a positive response waveform for the pulse signal output to the positive connecting wire and a negative response waveform for the pulse signal output to the negative connecting wire. An amplitude ratio calculating portion calculates an amplitude ratio based on the positive response waveform and the negative response waveform, and a leak detecting portion detects a leak between the battery and a ground based on the amplitude ratio.