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:
Feb. 24, 2026
Filed:
Dec. 28, 2021
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, JP;
Masanori Ishigaki, Nagakute, JP;
Keisuke Ishikawa, Nagakute, JP;
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute, JP;
Abstract
A detection device for detecting a status of a lithium-ion secondary battery includes a control module that acquires real part of AC impedance at a frequency at which the real part of the AC impedance is increased 10 times or more than the real part of the AC impedance at 1 kHz due to a skin effect, and detects deposition of lithium and/or the presence of foreign metal inside the lithium-ion secondary battery by using the acquired real part of the AC impedance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile