Abstract: A battery module includes a number of battery cells, which are connected to each other at connection poles. The battery cells have respective hard shell housings, in which at least one bus bar extends. A number of wound and/or stacked battery cells is electrically contacted by the at least one bus bar.

Abstract: The invention relates to a method for producing an electrode stack for a battery cell, comprising the following steps: providing a ribbon-shaped anode element (45), providing a ribbon-shaped cathode element (46), providing a first ribbon-shaped separator element (16), producing a ribbon-shaped composite element (50) by means of joining together the cathode element (46), the anode element (45) and the first separator element (16), simultaneously cutting the composite element (50) so as to produce multiple plate-shaped composite segments, stacking the produced composite segments to form a segment stack, stacking multiple segment stacks. The invention relates to a battery cell that comprises at least one electrode stack that is produced according to the method in accordance with the invention.

Abstract: The disclosure relates to a vehicle electrical system for a motor vehicle. The vehicle electrical system comprises: a low-voltage sub-system for at least one low-voltage load; a high-voltage sub-system for at least one high-voltage load; and a starter/generator; wherein the high-voltage sub-system is connected to the low-voltage sub-system by means of a coupling unit designed to draw energy from the high-voltage sub-system and to feed said energy to the low-voltage sub-system, wherein the high-voltage sub-system has a battery, which is designed to produce the high voltage and to output the high voltage to the high-voltage sub-system and which has at least two battery units having individual voltage taps, which are led to the coupling unit. The coupling unit is designed to selectively connect the battery units to the low-voltage sub-system. The disclosure further relates to a motor vehicle, comprising an internal combustion engine and such a vehicle electrical system.

Abstract: The invention relates to a method for operating a battery system (EB), preferably a lithium-ion battery system, containing at least one battery device, wherein in the case that a safe state of the at least one battery device is brought about from an irregular operating state of the at least one battery device, a current state of the at least one battery device is continuously checked and evaluated by means of at least one component (CSC) of the battery system and the bringing about of the safe state is performed in dependence on the current state of the at least one battery device or an environmental state of the at least one battery device, wherein in particular after the safe state of the at least one battery device has been brought about, hazard information is transmitted to a battery management system (BMS) by means of the at least one component (CSC) of the battery system (EB), wherein the hazard information in particular is hazard information about the current state of the at least one battery device an

Abstract: An on-board electrical system for a motor vehicle is disclosed. The on-board electrical system has a low-voltage subsystem for at least one low-voltage load, and has a high-voltage subsystem for at least one high-voltage load, and has a starter generator, wherein the high-voltage subsystem is connected to the low-voltage subsystem by means of a coupling unit, wherein the on-board electrical system has a battery which has at least two battery units having individual voltage taps which are routed to the coupling unit. In this case, the coupling unit is designed such that, in a first operating state, the high-voltage subsystem is fed from all of the battery units and the low-voltage subsystem is fed from one battery unit, and, in a second operating state, the high-voltage subsystem is fed from one battery unit and the low-voltage subsystem is fed from at least one battery unit.

Abstract: The disclosure relates to a power supply device for an electrically operable vehicle having an electric drive motor. The power supply device comprises an electric energy accumulator device, a range-extender with an internal combustion engine and a generator producing alternating current. The generator is mechanically connectable to the internal combustion engine, and the energy accumulator device is configured to be charged during driving with the alternating current from the generator. The energy accumulator device comprises several power supply connections on which respectively one of several controllable potentials can be provided, and several power supply branches having several serially connected power cell modules. Several power supply branches are interconnected on one end to the neutral point and each power supply connection is connectable to one end of a power supply branch.

Abstract: The disclosure relates to an electrical system for a vehicle, comprising a low-voltage sub-network for at least one low-voltage load and comprising a high-voltage sub-network for at least one high-voltage load and an electric generator. The high-voltage sub-network has a battery which is designed to generate a high-voltage and output same to the high-voltage sub-network and which has at least two battery units with individual voltage taps. The high-voltage sub-network is connected to the low-voltage sub-network via a coupling unit which is designed to draw energy from the high-voltage sub-network and supply said energy to the low-voltage sub-network. The coupling unit is designed to selectively connect the battery units to the low-voltage sub-network. The disclosure further relates to a method for operating an electrical system, to a motor vehicle, and to a battery management system and a computer program which are designed to carry out the method.

Abstract: A battery includes at least one battery module line, a sensor means for determining a charging stage of a battery cell, and a control unit. The battery module line includes a plurality of battery modules mounted in series, each module having at least one battery cell and a coupling unit. The at least one battery cell is mounted between a first input and a second input of the coupling unit, and the coupling unit is configured (i) to switch the at least one battery cell between a first terminal of the battery module and a second terminal of the battery module, on a first control signal, and (ii) to connect the first terminal to the second terminal on a second control signal. The sensor means is connectable to the at least one battery cell of each battery module.

Abstract: The invention relates to a method for operating an on-board electrical system (1) for a motor vehicle, wherein the on-board electrical system (1) has a low-voltage electrical subsystem (21) with at least one low-voltage load (29) and a starter (26), and has a high-voltage electrical subsystem (20) having at least one high-voltage load (25) and one electrical generator (23), wherein the high-voltage electrical subsystem (20) is connected to the low-voltage electrical subsystem (21) by means of a coupling unit (33) which is designed to draw energy from the high-voltage electrical subsystem (20) and to supply energy to the low-voltage electrical subsystem (21), wherein the high-voltage electrical subsystem (20) has a battery (40) which is designed to generate the high voltage and output said high voltage to the high-voltage electrical subsystem (20), and which has at least two battery units (41-1, 41-2, . . . , 41-n) with line sections (80-11, 80-12, . . . , 80-n2) which are routed to the coupling unit (33).

Abstract: The invention relates to a method for producing an electrode stack for a battery cell, comprising the following steps: providing a ribbon-shaped anode element (45), providing a ribbon-shaped cathode element (46), providing a first ribbon-shaped separator element (16), producing a ribbon-shaped composite element (50) by means of joining together the cathode element (46), the anode element (45) and the first separator element (16), simultaneously cutting the composite element (50) so as to produce multiple plate-shaped composite segments, stacking the produced composite segments to form a segment stack, stacking multiple segment stacks. The invention relates to a battery cell that comprises at least one electrode stack that is produced according to the method in accordance with the invention.

Abstract: A battery system is described, comprising a battery management unit, a battery cell monitoring unit, at least one battery cell and a safety electronics system for the battery cell. The safety electronics system has a first comparator and an alarm signal output for an alarm signal. The first comparator compares a battery cell voltage of the battery cell to a predetermined threshold voltage value and generates the alarm signal on the basis of the comparison. The battery threshold voltage is lower than the battery cell voltage in normal operation and higher than a critical voltage value. In addition, a motor vehicle with the battery system is described, the battery system being connected to a drive system of the motor vehicle.

Abstract: The disclosure relates to a method for determining a Coulombic efficiency of battery modules of a rechargeable battery with a circuit arrangement connected to the battery modules. The circuit arrangement has multiple current paths, each of which has a series circuit of switch modules and at least one power semiconductor element which can be operated in a linear mode in order to regulate the current flowing through the respective current path, and one of the battery modules is connected to each of the switch modules. Each of the switch modules is configured as a switch module for selectively connecting the connected battery module into the respective current path or to alternatively remove the connected battery module from the respective current path. In each of the current paths at least one of the battery modules is selected with the switch module.

Abstract: The disclosure describes a method for determining a coulombic efficiency of battery modules of a rechargeable battery using a circuit arrangement connected to the battery modules and that has a plurality of switching modules for selectively connecting every single one of the battery modules in a common current path or for alternatively isolating every single one of the battery modules from the common current path and from at least one power semiconductor element, which can be operated in linear mode, for regulating the current that flows through the current path. The switching modules are used to select at least one of the battery modules and to connect it in the current path while all other battery modules are isolated from the current path by the switching modules. The selected battery module is subjected to at least one discharge process and at least one charging process via the current path.

Abstract: A rechargeable lithium battery (28) has at least two layer cells (10) arranged on top of one another, where each layer cell (10) comprises an aluminum electrode layer (12, 12?, 12?), a cathode layer (14), a polymer electrolyte layer (16), a lithium anode layer (18) and a copper electrode layer (20, 20?, 20?) which are arranged on top of one another, wherein the copper electrode layer (20, 20?) of a layer cell (10) and the aluminum electrode layer (12, 12?) of an adjacent layer cell (10) are formed by a copper layer and an aluminum layer of a CUPAL sheet (22, 22?).

Abstract: A method for simulating a field-oriented stator voltage of a stator of an asynchronous machine required in the steady state during operation using a model, wherein the asynchronous machine is operated without a rotary encoder, in a field-oriented manner and with a graduated voltage, includes providing a field-oriented detected stator voltage. The method further includes providing a field-oriented detected stator current. The method further includes simulating the field-oriented stator voltage required in the steady state during operation on the basis of the field-oriented detected stator voltage and the field-oriented detected stator current.

Abstract: A battery management system for a battery module having at least one battery cell provides a current path between poles of the battery module in response to a tripping signal. The current path prevents or terminates an arc in a fuse of the at least one battery cell after the fuse has been tripped. The battery management system can further include an apparatus to trip the fuse and provide the tripping signal in response to identifying the tripping of the at least one fuse. The battery management system can further include an apparatus to receive the tripping signal.

Abstract: A battery management system includes at least one cell monitoring unit with a plurality of cell voltage terminals, supply lines coupled to the cell voltage terminals, and a cell monitoring circuit made of a plurality of electronic semiconductor modules connected in parallel via the supply lines. The battery management system is configured to monitor a plurality of battery cells via the cell monitoring unit. The battery cells are in each case connected on both sides with their respective positive battery cell terminal and negative battery cell terminal to the battery management system via the cell voltage terminals. Furthermore, one or several supply lines are provided with a melt fuse so that in each battery cell that is connected to the battery management system at least one supply line coupled to the battery cell comprises a melt fuse in its current path.

Abstract: Method for increasing safety when using bursting discs (BV), wherein the bursting disc (BV) is suitable for releasing gas in a controlled manner from battery systems (B), wherein a signal, in particular a warning signal, is generated in dependence upon the spatial change at least of one site on the surface of the bursting disc (BV).

Abstract: A cell connector for making electrically conductive contact with a plurality of battery cell terminals comprises a plurality of sections positioned next to each other including a plurality of first sections composed of an electrically conductive metal material, and at least one second section composed of an electrically insulating plastic. The at least one second section is positioned between a respective two of the plurality of first sections. The present disclosure further relates to a method for producing a cell connector, in which the at least one second section is connected to the at least two first sections by means of a nano-moulding method. The present disclosure furthermore relates to a battery module having a plurality of battery cells with terminals connected by at least one cell connector.

Abstract: A safety device for a battery having battery cells that are configured to connect to poles of the battery via charging and isolating devices includes a discharge device. The discharge device is configured to connect in parallel to the battery cells. The discharge circuit can include at least one discharge resistor and an electronic valve. The electronic valve is configured to switch on and off. The discharge circuit can be configured to activate with a battery management system.