Bayerische Motoren Werke Aktiengesellschaft

Gerhard Woelfl

Hartmut Proebstle

Jose Lopez De Arroyabe

Sherif Mahmoud

Daniel Findeisen

Rupert Neudecker

Michael Daurer

A method determines a temperature of at least one electronic switching element by way of a temperature measuring circuit. A first electronic switching element in an electronic module is first of all turned off and a second electronic switching element in the electronic module is turned on. A voltage measuring unit is then coupled to the electronic module and a voltage drop across the second electronic switching element is measured. A current intensity of a current flowing through the second electronic switching element is also determined and the temperature of the second electronic switching element is determined with the inclusion of the measured voltage drop and the determined current intensity. An electronic assembly for determining a temperature of at least one electronic switching element is also described.

Method and electronic assembly for determining a temperature of at least one electronic switching element

A method for monitoring battery cells of a primary on-board electrical system battery of a motor vehicle by galvanostatic impedance spectroscopy is provided. An AC signal having alternating currents of different frequencies is impressed onto the battery cells as an excitation signal, cell voltage signals of the battery cells are detected as frequency-dependent response signals to the excitation signal, impedance spectra of the battery cells are determined depending on the excitation signal and the response signals, and the primary on-board electrical system battery is divided into at least two subsections each having at least one battery cell in order to provide the excitation signal. The primary on-board electrical system battery is electrically connected to a secondary on-board electrical system battery of the motor vehicle.

Method for monitoring battery cells of a primary on-board electrical system battery, on-board electrical system and motor vehicle

A system and method are provided for starting an internal-combustion engine arranged in a vehicle equipped with an electric machine that at least temporarily drives the internal-combustion engine and a first electrical energy storage unit. An adjusting unit is provided by which the electric machine is connectable with the first storage unit. The adjusting unit is configured to detect at least one defined internal-combustion engine operating state and/or at least one defined vehicle operating state and, at least as a function of the detected internal-combustion engine operating state and/or the detected vehicle operating state, for adjusting an electric quantity which determines an electric power drawn from the first storage unit by the electric machine when driving the internal-combustion engine, or for itself adjusting the drawn electric power.

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Geltendorf, Germany

Gerhard Woelfl