公开(公告)号：US20180156872A1

公开(公告)日：2018-06-07

申请号：US15819663

申请日：2017-11-21

申请人： Yasumasa Oguma ,  Tetsuya Osaka ,  Shingo Tsuda ,  Kazuaki Utsumi ,  Tokihiko Yokoshima ,  Daikichi Mukoyama

发明人： Yasumasa Oguma ,  Tetsuya Osaka ,  Shingo Tsuda ,  Kazuaki Utsumi ,  Tokihiko Yokoshima ,  Daikichi Mukoyama

IPC分类号： G01R31/36

CPC分类号： G01R31/389 ,  G01R31/3648 ,  G01R31/392

摘要： A battery state estimating apparatus is provided with: an acquirer configured to obtain a plurality of complex impedances of a battery at a plurality of different temperatures; a calculator configured to calculate a slope of a straight line connecting values of the obtained plurality of complex impedances at a first predetermined frequency on a complex plane having an axis that is a real component of the complex impedance and an axis that is an imaginary component of the complex impedance, as a slope of the complex impedance; a storage configured to store in advance a relation between the slope of the complex impedance and a battery state associated with the battery; and an estimator configured to estimate the battery state on the basis of the calculated slope of the complex impedance and the stored relation.

公开(公告)号：US10718817B2

公开(公告)日：2020-07-21

申请号：US15819663

申请日：2017-11-21

申请人： Yasumasa Oguma ,  Tetsuya Osaka ,  Shingo Tsuda ,  Kazuaki Utsumi ,  Tokihiko Yokoshima ,  Daikichi Mukoyama

发明人： Yasumasa Oguma ,  Tetsuya Osaka ,  Shingo Tsuda ,  Kazuaki Utsumi ,  Tokihiko Yokoshima ,  Daikichi Mukoyama

IPC分类号： G01R31/36 ,  G01R31/389 ,  G01R31/392

摘要： A battery state estimating apparatus is provided with: an acquirer configured to obtain a plurality of complex impedances of a battery at a plurality of different temperatures; a calculator configured to calculate a slope of a straight line connecting values of the obtained plurality of complex impedances at a first predetermined frequency on a complex plane having an axis that is a real component of the complex impedance and an axis that is an imaginary component of the complex impedance, as a slope of the complex impedance; a storage configured to store in advance a relation between the slope of the complex impedance and a battery state associated with the battery; and an estimator configured to estimate the battery state on the basis of the calculated slope of the complex impedance and the stored relation.