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:
Jan. 27, 2026
Filed:
Mar. 25, 2022
Hioki E.e. Corporation, Nagano, JP;
Akinori Hotta, Nagano, JP;
Hiroyuki Toya, Nagano, JP;
Hiroyoshi Ikeda, Nagano, JP;
Shin Kasai, Nagano, JP;
Tomoharu Sakai, Nagano, JP;
Yasuyuki Tsukioka, Nagano, JP;
Koichi Yanagisawa, Nagano, JP;
HIOKI E.E. CORPORATION, Nagano, JP;
Abstract
A signal injection unit configured to inject an AC signal to an target injection line to which a battery is connected in series, a non-contact-type current sensor that detects a current value of the AC signal flowing through the target injection line in a non-contact manner with respect to the target injection line and outputs a detection signal, a voltage detection unit that detects a voltage value of an AC voltage generated at ends of the battery by being in contact with the ends and outputs an end-to-end voltage signal, and a processing unit that measures an internal impedance of the battery on the basis of the detection signal and the end-to-end voltage signal. The signal injection unit is configured to inject the AC signal to the target injection line in a non-contact manner.