Method for determining a potential of an anode and/or a potential of a cathode in a battery cell

US10444291B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Olivier Cois · Weingarten, DE
• Thomas Dufaux · Stuttgart, DE
• Andre Boehm · Yongin-si, KR

Key dates

• Filing date: May 13, 2016
• Grant date: Oct 15, 2019
• Expiry date: Oct 22, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/70
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method determines a potential of an anode and/or a potential of a cathode in a battery cell. The method measures a current flowing through the battery cell, determines a charge transfer resistance of the battery cell, ascertains a charge transfer resistance of the anode and a charge transfer resistance of the cathode, ascertains a depth of discharge, ascertains an anode residual voltage and a cathode residual voltage from the depth of discharge from an idle voltage, ascertains an anode excess potential from the charge transfer resistance of the anode and the current and ascertains a cathode excess potential from the charge transfer resistance of the cathode and the current. The method ascertains the potential of the anode from the anode residual voltage and the anode excess potential and ascertains the potential of the cathode from the cathode residual potential and the cathode excess potential.