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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.:

US 12638508 B1

PDFFull Text
Date of Patent:
May. 26, 2026

Filed:

Jul. 20, 2022

Battery measurement apparatus

Applicant:

Denso Corporation, Kariya-city, JP;

Inventors:

Masaaki Kitagawa, Kariya-city, JP;

Kazuo Matsukawa, Kariya-city, JP;

Yuji Yamagami, Kariya-city, JP;

Masaki Uchiyama, Kariya-city, JP;

Assignee:

DENSO CORPORATION, Kariya, JP;

Attorney:

Oliff PLC

Primary Examiner:

Hyun D Park

Int. Cl.
CPC ...
G01R 31/36 (2020.01); G01R 31/389 (2019.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/103 (2021.01); H01M 50/107 (2021.01); H01M 50/317 (2021.01); H01M 50/548 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01); H01M 50/559 (2021.01); H01M 50/569 (2021.01);
U.S. Cl.
CPC ...
G01R 31/3648 (2013.01); G01R 31/389 (2019.01); H01M 10/425 (2013.01); H01M 10/48 (2013.01); H01M 50/103 (2021.01); H01M 50/107 (2021.01); H01M 50/317 (2021.01); H01M 50/548 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01); H01M 50/559 (2021.01); H01M 50/569 (2021.01); H01M 2010/4271 (2013.01); H01M 2200/20 (2013.01);
Abstract

In a battery measurement apparatus, a signal control unit, provided on a first electrical path connecting electrodes of a storage battery, causes the storage battery to output a predetermined alternating-current signal or inputs a predetermined alternating-current signal to the storage battery. A response signal input unit, provided on a second electrical path connecting the electrodes, inputs a response signal of the storage battery in response to the alternating-current signal through the second electrical path. Based on the response signal, a calculating unit calculates information related to a complex impedance of the storage battery. A magnetic flux passage area, surrounded by the storage battery and the second electrical path, is formed. A size of the magnetic flux passage area is set such that an error between an actual complex impedance of the storage battery and a complex impedance calculated by the calculating unit is within a range of ±1 mΩ.

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