Method for determining a state of charge and remaining operation life of a battery

US10031185B2 · kind B2 · utility

Assignee

• EXIDE TECHNOLOGIES, LLC · US

Inventors

• Rainer Bussar · Heitersheim, DE
• Gerd Hoogestraat · Bad Lauterberg, DE
• Wolfgang Rudolf Fischer · Büdingen, DE
• Thomas P. Hopper · Durham, US
• Nicolas Henri Bernard Redon · Heitersheim, DE
• Olaf Sielemann · Wächtersbach, DE
• Sebastian Zeh · Kefenrod, DE

Key dates

• Filing date: Feb 4, 2014
• Grant date: Jul 24, 2018
• Expiry date: Jun 5, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Determining a state of charge (SOC) of a rechargeable battery includes using a first process to determine a first value for the SOC of the battery and using a second process to determine a second value for the SOC of the battery and deriving the SOC as a weighted average of the first value for the SOC and the second value for the SOC. During a charging cycle of the battery an input charge of the battery is determined from an input current flowing into the battery and a charging time. During a discharging cycle an output charge of the battery is determined from an output current flowing out of the battery, a discharging time and an actual capacity of the battery is the sum of the input charge over charging cycles minus the sum of the output charge over discharging cycles.