Title:
電気化学的なエネルギー貯蔵セルのための診断方法および診断システム
Document Type and Number:
Japanese Patent JP7181311
Kind Code:
B2
Abstract:
A diagnostic method and a diagnostic system for an electrochemical energy storage cell, and a vehicle including the diagnostic system. An electrical current due to an electrical connection between the energy storage cell and a central load is modulated at a first excitation frequency and is measured centrally. An electrical voltage at the energy storage cell is measured and a first impedance value is determined based on the electrical current and the electrical voltage. Also, a previously-known electrical current due to an electrical connection between the energy storage cell and a predefined cell-individual load is modulated at a second excitation frequency. The electrical voltage occurring at the energy storage cell is measured and a second impedance value is determined based on the previously-known electrical current and the electrical voltage. Diagnostic information is determined and output based on a comparison of the first impedance value with the second impedance value.
Inventors:
Schmidt Jan Philip
Application Number:
JP2020559384A
Publication Date:
November 30, 2022
Filing Date:
March 29, 2019
Export Citation:
Assignee:
Bayerische Motorenwerke Actien Gezershyaft
International Classes:
G01R27/02; G01R31/00; G01R31/389; H01M10/48
Domestic Patent References:
| JP888941A | ||||
| JP201364697A | ||||
| JP2004119227A | ||||
| JP9232005A | ||||
| JP201252831A | ||||
| JP2012237660A |
Attorney, Agent or Firm:
Esaki Mitsufumi
Blacksmith Minoru Sawa
Shinsuke Nakamura
Blacksmith Minoru Sawa
Shinsuke Nakamura