Audi Ag

Evonik Degussa Gmbh

Li-tec Battery Gmbh

Evonik Litarion Gmbh

Peter Pilgram

Michael Hinterberger

Berthold Hellenthal

Andreas Gutsch

Frank Stenger

Heinz-Willi Vassen

Rolf-Walter Terwonne

Manfred Dannehl

Joerg Kaiser

Jutta Zimmermann

Arkadi Maisels

Yves Gorat Stommel

Martin Miessen

Ernst Robert Barenschee

Henrik Hahn

Denny Thiemig

A protective device for shutting down at least one battery cell in a battery system of a motor vehicle in case of an electrical short circuit. The protective device is configured to conduct an electric current, which flows through the at least one battery cell, through a measurement element, in which the current generates an electrical measurement voltage in dependence on its amperage and/or its amperage gradient. The measurement element is coupled to an analog monitoring circuit, in which a comparison unit is configured to trigger a triggering signal for the case that the amperage rises at least by a predetermined delta value within a predetermined duration, and a switching unit is configured to receive the triggering signal and to interrupt the current upon receiving the triggering signal by switching at least one switching element.

Protective device and method for shutting down at least one battery cell in a battery system in case of an electrical short circuit, and also motor vehicle, battery system, and battery cell having the protective device

A method for discharging a battery module, having at least two battery cells, of a battery having at least two battery modules, wherein the battery cells of each of the battery modules are arranged next to one another and are mechanically and electrically connected to one another, wherein, in each of the battery modules, the respective battery cells are individually activated and deactivated in terms of an energy storage function by a cell switch unit, wherein the battery cells of the battery module to be discharged are selectively electrically coupled successively to a discharge device by the cell switch unit and starting from one predefined battery cell, in order to individually successively electrically discharge the battery cells in order to discharge the battery module.

Discharging a battery module, having at least two battery cells, of a battery having at least two battery modules

A protective device for switching off a battery cell of a motor vehicle battery in the event of an electrical short-circuit. The battery cell has two cell terminals and an energy storage unit for storing energy. The energy storage unit is connected to the cell terminals in an electrically conductive manner in order to provide cell voltage to the cell terminals. The protective device detects the short-circuit as a function of at least the cell voltage affecting the battery cell. In this case, the battery cell has the protective device and at least one switching device, which is arranged between the energy storage unit and at least one of the cell terminals. The protective device isolates the energy storage unit from the at least one of the cell terminals in order to switch off the battery cell by the switching device.

Protective device, battery, motor vehicle, and method for switching off a battery cell

Growing community of inventors

Neuburg an der Donau, Germany

Peter Pilgram