Volvo Car Corporation

Torbjorn Larsson

Jonas Forssell

Narendar Rao Gannamaneni

Robert Eriksson

Nikitas Sidiropoulos

Markus Ekström

Daniel Midholm

Petter Almhagen

Patrik Larsson

Fatih Al

Örjan Spjuth

Alexander Engström

Jonas Björkholtz

Fredrik Ulmhage

Mats Thorngren

Fabian Fogelberg

Linus Franzén

Emil Månsson

Pelle Thorson

Emil Wall

Mikael Sonesson

Yafan Zhang

Aryan Madadi

Peter Gunberg

Jonas Dahllöf

A battery control assembly for a battery system. The battery control assembly includes a plurality of cell-level control units, each including a cell-level switching unit being operable as a cell-level inverter. The plurality of cell-level control units are arranged in three control unit strings and the cell-level control units of each control unit string are electrically connected in series. First ends of each control unit string are electrically connected to a corresponding AC charging terminal. Second ends of the control unit strings are electrically connected in series via a first end switch and a second end switch. Moreover, at least one of the control unit strings includes an inner connection terminal. Furthermore, an electric drivetrain for an electric vehicle having such a battery control assembly is presented.

Battery control assembly for a battery system and electric drivetrain for an electric vehicle

A method for determining a status of a vehicle battery includes determining an initial temperature and an initial state of charge of the battery, determining a current threshold value based on the initial temperature and the initial state of charge of the battery, starting the vehicle engine, charging the battery for a predetermined charging period t, measuring two charging currents, Iand I, to the battery at two predetermined points in time during the charging period t, determining an expected current value at a time t=t+tbased on the measured charging currents, comparing the expected current value with the current threshold value, and determining the battery is faulty if the expected current value is lower than the current threshold value.

Method and apparatus for determining the status of a battery in a vehicle

A method for performing a diagnostic test of an alternator, a test arrangement and a vehicle are provided. The method may include running an engine, providing a signal representative of a pre-determined environmental condition to the alternator, providing an output voltage and output current to a battery based on the pre-determined environmental condition, and determining a battery voltage. The method may also include comparing the determined battery voltage with a pre-defined reference-voltage representative of the pre-determined environmental condition and outputting an approved test result if the difference between the determined battery voltage and the pre-defined reference voltage falls within a predetermined range.

Method for performing a diagnostic test of an alternator in a vehicle, test arrangement and vehicle

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Alingsas, Sweden

Torbjorn Larsson