Bayerische Motoren Werke Aktiengesellschaft

Florian Pritscher

Wladislaw Waag

Felix Laasch

Tobias Schmieg

Michael Schneider

Jan Philipp Schmidt

Andreas Fuchs

Timo Anderten

Christian Schardax

Sebastian Eichinger

Andre Ribeiro

Suljo Hajdarbasic

Michael Binder

Ingo Scherer

A battery management system for a high-voltage battery of a motor vehicle monitors battery cells of the high-voltage battery. The battery management system can be arranged in a battery housing of the high-voltage battery and has an electronic circuit which is arranged on a circuit carrier and has a processor and a communication interface for communication with at least one vehicle-side unit external to the high-voltage battery. The electronic circuit has at least one pressure sensor, which is designed to detect pressure signals in the battery housing and transmit same to the processor. The processor is designed to detect, on the basis of the transmitted pressure signals, a thermal runaway of at least one battery cell of the high-voltage battery, to generate a signal in the event that a thermal runaway is detected, and to provide the signal of the communication interface for transmission to the unit.

Battery management system for a high-voltage battery of a motor vehicle, high-voltage battery, and motor vehicle

A switching device for an on-board electrical system of an electrically driven motor vehicle includes an electromechanical switch which is designed to connect and interrupt a supply line of the on-board electrical system. The electromechanical switch has: a stationary first switching contact, a movable second switching contact, and an actuation unit which has a mechanical force-transmitting element and a drive element. In order to switch from an open switching state to a closed switching state of the electromechanical switch, the drive element moves the transmitting element along a movement path, and the force-transmitting element moved along the movement path acts mechanically on the second switching contact and moves the second switching contact toward the first switching contact. In order to maintain the closed switching state of the electromechanical switch, the force-transmitting element applies, at the end of the movement path, a pressing force to the second switching contact for pressing against the first switching contact, without further driving by way of the drive element.

Switching device having an actuation unit, on-board electrical system and motor vehicle

A switch-off device includes a current conductor for forming a load current path, a pyrotechnically activatable separating unit for interrupting the load current path in the event of a fault, including a separating element for detaching the current conductor and a pyrotechnic element for accelerating the separating element in the direction of the current conductor, and an arc extinguishing unit for extinguishing an arc, including a melting conductor which is not normally incorporated into the load current path and an extinguishing device for extinguishing the melting conductor.

Switch-off device, high-voltage onboard electrical system, and motor vehicle

A test apparatus for testing at least one switch device for a high-voltage battery of a vehicle, includes a voltage source for generating an electrical test voltage between a positive high-voltage path and a negative high-voltage path of the at least one switch device. The test apparatus has a first connecting device and a first current source for feeding a first electrical test current into the positive high-voltage path, wherein the first connecting device, the first current source and the positive high-voltage path together form a first circuit when testing the at least one switch device. The test apparatus has a second connecting device and a second current source for feeding a second electrical test current into the negative high-voltage path, wherein the second connecting device, the second current source and the negative high-voltage path together form a second circuit when testing the at least one switch device.

Test apparatus and method for synthetically testing at least one switch device for a high-voltage battery of a vehicle

A detection device detects a mechanical deformation of a high-voltage accumulator of a motor vehicle, and includes: a sensor element, which senses an electrical measurement variable, wherein the sensor element is substantially flat and is attached at least partially to a first component of the high-voltage accumulator; and an evaluation device for analyzing the electrical measurement variable between the sensor element and a second component of the high-voltage accumulator and for outputting a corresponding warning on the basis of the electrical measurement variable, wherein at least one region of the surface of the second component is electrically conductive.

Detection device for detecting a deformation of a housing of a high-voltage accumulator of a motor vehicle

An electrical energy store has a plurality of storage modules, each of which has at least one temperature sensor string having a temperature sensor in the form of a temperature-dependent resistor for measuring the storage module temperature, and a battery control unit, which, based on the resistance values of the temperature sensor strings, determines the temperatures at the respective temperature sensors. The battery control unit is designed to determine a respective storage module type based on the measured resistance values of the temperature sensor strings. A method for identifying a storage module type, includes the steps: detecting a resistance value of at least one temperature sensor string having a temperature sensor, determining the temperatures present at the respective temperature sensors via a battery control unit on the basis of the resistance values of the temperature sensor strings, and determining a storage module type on the basis of the resistance value of the at least one temperature sensor string per storage module.

Electrical energy store and method for identifying a storage module type of an electrical energy store

A disconnection device for a high-voltage electrical system of a motor vehicle for disconnecting a high-voltage line of the high-voltage electrical system, includes an overcurrent protection apparatus; a first disconnecting unit which is made of a first actuatable disconnecting unit, the first disconnecting unit being designed to interrupt a current flow over the first disconnecting unit in the activated state; a second disconnecting unit which is made of a second actuatable disconnecting unit and the overcurrent protection apparatus, the second disconnecting unit being designed to conduct an overcurrent to the overcurrent protection apparatus which interrupts the current flow over the second disconnecting unit in the activated state; and a control unit which is designed to activate at least the second disconnecting unit in the event of an overcurrent and to activate at least the first disconnecting unit in the event of an overcurrent-independent event in order to separate the high-voltage line.

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Munich, Germany

Florian Pritscher