Verfahren und Vorrichtung zur Schätzung eines Ladezustands einer Batterie

Details

Veröffentlichungs-Nr.

EP3579007

Aktenzeichen

EP18176500

Anmeldetag

7. Juni 2018

Veröffentlichung

17. August 2022

Erteilung

17. August 2022

Rechtsraum

EP

IPC

G01R31/367G01R31/3828G01R31/3842G01R31/378H01M10/48

Abstract

According to the proposed embodiments a state of charge of a battery is estimated by a battery model specific to the battery, the battery model providing a section-wise defined correlation of terminal voltage values depending on state of charge values wherein each of said sections of the battery model delimits a monotonic dependence of the correlation from others of said sections. By segmenting the correlation of terminal voltage values depending on a state of charge value into sections, each segment within such the section-wise defined correlation of terminal voltage values depending on state of charge values is mathematically spoken a bi-unique function suitable for transformation into an inverse function defined within the section.According to a further embodiment, the estimated state of charge is continuously refined by an iterative feedback loop including a coulomb counting for estimating a battery charge value, wherein refined estimated battery charge values state of charge values at a previous cycle are projected forward to the current cycle.

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Firmen

Rolls-Royce Deutschland Ltd & Co KG
Siemens Aktiengesellschaft

Land

🇩🇪 Deutschland

Fachgebiete