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.