公开(公告)号：US11215673B2

公开(公告)日：2022-01-04

申请号：US16344986

申请日：2018-04-03

Applicant: WASEDA UNIVERSITY ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tetsuya Osaka ,  Tokihiko Yokoshima ,  Daikichi Mukoyama ,  Hiroki Nara

IPC: G01R31/392 ,  G01R31/374 ,  G01R31/36 ,  G01R31/389 ,  G01R31/367 ,  H02J7/00 ,  H01M10/48

Abstract: A battery module 1 includes a group battery 2 in which batteries 30 (31 to 33) are connected in series, and an assessment evaluation unit 3 configured to calculate respective states of health of battery cells 10, in which the group battery 2 includes label elements 20 respectively connected in parallel with the battery cells 10 and configured such that respective impedance characteristics of the batteries 30 differ from one another, and the assessment evaluation unit 3 includes a measurement unit 42 configured to measure a first Cole-Cole plot of the group battery 2, a first calculation unit 44 configured to decompose the first Cole-Cole plot into respective second Cole-Cole plots of the batteries 30, a second calculation unit 44 configured to calculate respective third Cole-Cole plots of the battery cells 10 from the second Cole-Cole plots, and a third calculation unit 45 configured to calculate respective states of the battery cells 10 from the third Cole-Cole plots.

公开(公告)号：US09531040B2

公开(公告)日：2016-12-27

申请号：US14433447

申请日：2013-10-04

Applicant: WASEDA UNIVERSITY

Inventor： Tetsuya Osaka ,  Toshiyuki Momma ,  Tokihiko Yokoshima ,  Daikichi Mukoyama ,  Hiroki Nara

IPC: H01M10/48 ,  G01R31/36 ,  H01M10/42 ,  H01M10/0525

CPC classification number: H01M10/486 ,  G01R31/3651 ,  G01R31/3662 ,  G01R31/3675 ,  G01R31/3679 ,  H01M10/0525 ,  H01M10/4207 ,  H01M10/482

Abstract: A battery system includes: a secondary battery; a memory portion that stores information which includes a measurement frequency, a measurement temperature, and an initial limiting capacitance of one secondary battery; a temperature measuring section; a power supply section which applies an AC signal of 0.5 mHz to 10 mHz, to the secondary battery at 40° C. to 70° C.; a measuring portion which measures an impedance of the secondary battery by the AC signal; and a calculating portion that calculates the degree of degradation of the secondary battery.

Abstract translation: 电池系统包括：二次电池; 存储部，其存储包含一个二次电池的测量频率，测量温度和初始极限电容的信息; 温度测量部; 在40℃〜70℃下向二次电池施加0.5mHz〜10mHz的交流信号的电源部。 测量部分，其通过AC信号测量二次电池的阻抗; 以及计算部分，其计算二次电池的劣化程度。

公开(公告)号：US09977059B2

公开(公告)日：2018-05-22

申请号：US14758052

申请日：2013-12-26

Applicant: WASEDA UNIVERSITY

Inventor： Tetsuya Osaka ,  Toshiyuki Momma ,  Tokihiko Yokoshima ,  Daikichi Mukoyama ,  Hiroki Nara

IPC: G01N27/416 ,  G01R23/16 ,  G01R31/36 ,  G01N27/28 ,  H01M10/48

CPC classification number: G01R23/16 ,  G01N27/28 ,  G01N27/4161 ,  G01R31/3662 ,  H01M10/48

Abstract: An electrochemical analysis apparatus 1 includes a power controller 20 that generates a rectangular wave signal having a first frequency (f1) and applies the rectangular wave signal to an electrochemical cell 10 including a plurality of electrodes 11 to 13 and an electrolyte 14, a Fourier transform section 30 that Fourier-transforms a response signal of the electrochemical cell 10 to the rectangular wave signal and calculates frequency characteristics including a component of a second frequency f2 of an integer multiple of the first frequency f1, and a calculating section 40 that calculates an impedance characteristic of the electrochemical cell 10 based on the frequency characteristics calculated by the Fourier transform section 30.