Volvo Car Corporation

Pelle Thorson

Torbjorn Larsson

Mats Thorngren

Emil Wall

Daniel Midholm

Petter Almhagen

Alexander Engström

Fabian Fogelberg

Linus Franzén

Emil Månsson

Aryan Madadi

Torbjörn Larsson

Linus FRANZÉN

Alexander ENGSTRÖM

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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Ucklum, Sweden

Pelle Thorson