Volkswagen Ag

Martin Heuser

Christian Wick

Stephan Gloger

Sascha Beaury

Jens Bandener

Gianpiero Toso

Philipp Scheer

A device for monitoring battery cells of a battery string under load condition. The device has differential voltage units for each battery cell, wherein a band-pass filter is arranged downstream of each differential voltage unit, wherein the band-pass filters are connected to rectifier circuits with a smoothing circuit arranged downstream, and wherein the device is designed so the output signals of the smoothing circuits are supplied to an evaluation unit and are compared for deviations in relation to a standardized output signal.

Device for monitoring battery cells of a battery string in load operation

A method and an apparatus for determining at least one state variable of a storage element for electrical energy having at least one control device, at least one storage element for electrical energy, and at least one temperature sensor, wherein the temperature sensor detects the temperature of the storage element continuously or periodically, wherein the control device determines the state variable of the storage element at least based on the detected temperature, wherein the control device fills measurement gaps of the temperature sensor using data of a weather service, the data then is used in the determination of the at least one state variable.

Method and device for determining at least one state variable of a storage element for electrical energy

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Bochum, Germany

Martin Heuser