Abstract: A battery system having a battery pack with a positive pole, a negative pole, at least one battery cell, and a pack voltage divider, and at least one high-voltage coupling network electrically connectable to the battery pack, having a positive terminal, a negative terminal, and a link voltage divider. The pack voltage divider comprises a first measuring resistance (RM1) and a first measuring switch (SM1) connected to one another between the negative pole and a first reference point, and a second measuring resistance (RM2) and a second measuring switch (SM2) connected to one another between the positive pole and the first reference point. The link voltage divider comprises a third measuring resistance (RM3) connected between the negative terminal and a second reference point, and a fourth measuring resistance (RM4) connected between the positive terminal and the second reference point.

Abstract: A diagnostic circuit (60) for diagnosing a battery disconnect unit (100) for disconnecting a battery system (200) from an electrical system (300). The battery disconnect unit (100) includes a first switching element (S1) and a second switching element (S2). A first connection of the first switching element (S1) is connected to a first node point (8), and a second connection of the first switching element (S1) is connected to the first terminal (2). A first connection of the second switching element (S2) is connected to the first node point (8), and a second connection of the second switching element (S2) is connected to the second terminal (4). The diagnostic circuit (60) includes a first voltage divider (61) and a second voltage divider (62).

Abstract: A battery disconnect unit (100) for disconnecting a battery system (200) comprising at least one battery cell (5), from an electrical system (300). The battery disconnect unit (100) comprises a first terminal (2), a second terminal (4), a first switching element (S1), a second switching element (S2) and a current sensing resistor (6). A first connection of the first switching element (S1) is connected to a first connection of the current sensing resistor (6), and a second connection of the first switching element (S1) is connected to the first terminal (2). A first connection of the second switching element (S2) is connected to a second connection of the current sensing resistor (6), and a second connection of the second switching element (S2) is connected to the second terminal (4).

Abstract: The invention relates to a battery system (10) for an electric vehicle, comprising a battery pack (5) having a positive pole (22), a negative pole (21), at least one battery cell (2) and a pack voltage divider (25), and comprising at least one coupling network having a negative terminal (11) and a positive terminal (12), wherein the pack voltage divider (25) comprises a positive pack resistor (RP2) and a positive sub-pack-resistor (RSP2) which are connected to one another in series between the positive pole (22) and a reference point (50), and a negative pack resistor (RP1) and a negative sub-pack-resistor (RSP1) which are connected to one another in series between the negative pole (21) and the reference point (50).

Abstract: A switching element (100) that comprises a switching unit (30), a first and a second coil unit (10, 20) for closing and opening the switching unit (30), wherein the first coil unit (10) comprises a first coil (12) and wherein the second coil unit (20) comprises a second coil (22). According to the invention, the first coil unit (10) comprises a first controllable delay circuit (14) that is connected in series with the first coil (12). The invention further relates to a switching device (200) that comprises a switching element (100) according to the invention. The invention further relates to a first and a second method for the operation of the switching device (200) according to the invention.

Abstract: The invention relates to a shunt resistor (2) for detecting the status of an electrical energy storage unit (1), wherein the shunt resistor (2) comprises a first layer (4), a second layer (6) and a third layer (8). According to the invention, the layers (4, 6, 8) are arranged in a layered manner in a stacking direction (V), wherein the second layer (6) is arranged between the first layer (4) and the third layer (8), and wherein the layers (4, 6, 8) are in physical contact with one another at one of the sides having the greatest respective surface area, and wherein the layers (4, 6, 8) are arranged at least partially overlapping.

Abstract: A battery system having a battery pack with a negative pole, a positive pole and a battery cell, a coupling network having a first negative terminal and a first positive terminal, a pack voltage divider, and a coupling voltage divider. The first positive terminal is connectable to the positive pole via a switch. Optionally, the first negative terminal is connectable to the negative pole via a switch. The pack voltage divider includes a two resistors connected between the positive pole and a first reference point. A negative pack measurement resistor and a negative sub-pack measurement resistor are dis-connectable from the negative pole or the first reference point via a switch. A positive coupling measurement resistor and a positive sub-coupling measurement resistor are connected between the first positive terminal and the first reference point. Two resistors are connected between the first negative terminal and the first reference point.

Abstract: A method for detecting an internal short circuit in a first electrical energy storage unit of an electrical energy storage device is described, wherein the electrical energy storage device comprises at least two electrical energy storage units including a first electrical energy storage unit and a second electrical energy storage unit electrically connected in parallel in the electrical energy storage device, the method including recording an electric current flowing into or out of the first electrical energy storage unit, recording an electric current flowing into or out of the second electrical energy storage unit, determining a short-circuit current in the first electrical energy storage unit based on the at least two recorded electric currents, and detecting an internal short circuit when the magnitude of the short-circuit current exceeding a predefined short-circuit current threshold.

Abstract: The invention relates to a current sensor comprising an electric conductor (10), through which a first current (I) can flow parallel to a first direction (R1) and which comprises three regions (21, 22, 23) immediately following on from each other in the first direction (R1). A middle region (22) of the three regions (21, 22, 23) comprises a conductor cross-sectional area that is smaller than a conductor cross-sectional area of each of the two outer regions (21, 23) of the three regions (21, 22, 23). A voltage sensor of the current sensor is designed to measure a first voltage between the two terminals (41, 42) thereof. The first voltage is the same as a voltage applied to a measuring region (22, 25) at least partially coinciding with the middle region (22).

Abstract: The invention relates to a shunt resistor (2) for detecting the status of an electrical energy storage unit (1), wherein the shunt resistor (2) comprises a first layer (4), a second layer (6) and a third layer (8). According to the invention, the layers (4, 6, 8) are arranged in a layered manner in a stacking direction (V), wherein the second layer (6) is arranged between the first layer (4) and the third layer (8), and wherein the layers (4, 6, 8) are in physical contact with one another at one of the sides having the greatest respective surface area, and wherein the layers (4, 6, 8) are arranged at least partially overlapping.

Abstract: Electrical energy storage system (1), comprising at least two strings (STR1, STR2, STR3) interconnected in parallel connection, wherein the strings each have at least two electrical energy storage units (15) interconnected in series connection, characterized in that at least one first electrically conductive cross-connection (11) between electrical energy storage units (15) at an identical first electrical potential in the strings (STR1, STR2, STR3) interconnected in parallel connection is electrically conductively connected via at least one diode (12) to a means for detecting an electric current (13) and a controllable electrical energy source (14), wherein the diode (12) is not incorporated into the first electrically conductive cross-connection (11).

Abstract: A switching element (100) that comprises a switching unit (30), a first and a second coil unit (10, 20) for closing and opening the switching unit (30), wherein the first coil unit (10) comprises a first coil (12) and wherein the second coil unit (20) comprises a second coil (22). According to the invention, the first coil unit (10) comprises a first controllable delay circuit (14) that is connected in series with the first coil (12). The invention further relates to a switching device (200) that comprises a switching element (100) according to the invention. The invention further relates to a first and a second method for the operation of the switching device (200) according to the invention.

Abstract: The invention relates to a current sensor comprising an electric conductor (10), through which a first current (I) can flow parallel to a first direction (R1) and which comprises three regions (21, 22, 23) immediately following on from each other in the first direction (R1). A middle region (22) of the three regions (21, 22, 23) comprises a conductor cross-sectional area that is smaller than a conductor cross-sectional area of each of the two outer regions (21, 23) of the three regions (21, 22, 23). A voltage sensor of the current sensor is designed to measure a first voltage between the two terminals (41, 42) thereof. The first voltage is the same as a voltage applied to a measuring region (22, 25) at least partialy coinciding with the middle region (22).

Abstract: The present invention relates to a circuit arrangement for switching a high-voltage MOSFET (7) for precharging an intermediate circuit capacitance of a high-voltage on-board network with a first circuit assembly (11), by means of which the switching times of a high-voltage MOSFET used for charging the intermediate circuit capacitance can be reduced.

Abstract: The present invention relates to a circuit arrangement for switching a high-voltage MOSFET (7) for precharging an intermediate circuit capacitance of a high-voltage on-board network with a first circuit assembly (11), by means of which the switching times of a high-voltage MOSFET used for charging the intermediate circuit capacitance can be reduced.

Abstract: Electrical energy storage system (1), comprising at least two strings (STR1, STR2, STR3) interconnected in parallel connection, wherein the strings each have at least two electrical energy storage units (15) interconnected in series connection, characterized in that at least one first electrically conductive cross-connection (11) between electrical energy storage units (15) at an identical first electrical potential in the strings (STR1, STR2, STR3) interconnected in parallel connection is electrically conductively connected via at least one diode (12) to a means for detecting an electric current (13) and a controllable electrical energy source (14), wherein the diode (12) is not incorporated into the first electrically conductive cross-connection (11).

Abstract: A method for detecting an internal short circuit in a first electrical energy storage unit of an electrical energy storage device is described, wherein the electrical energy storage device comprises at least two electrical energy storage units including a first electrical energy storage unit and a second electrical energy storage unit electrically connected in parallel in the electrical energy storage device, the method including recording an electric current flowing into or out of the first electrical energy storage unit, recording an electric current flowing into or out of the second electrical energy storage unit, determining a short-circuit current in the first electrical energy storage unit based on the at least two recorded electric currents, and detecting an internal short circuit when the magnitude of the short-circuit current exceeding a predefined short-circuit current threshold.

Abstract: A communications system for a battery-management system of a battery includes coupling networks that are each connected or connectable via two input-side connections to a transmission channel, and via two output-side connections to a respective one of a plurality of communications users. The transmission channel can be used for the transmission of communications signals at a transmission frequency and that are to be transmitted and/or received by the communications users during a communications process between the communications users. At least one of the coupling networks has a first and second operating state, in which an input impedance that occurs between the two input-side connections of the respective predefined coupling network at the transmission frequency has two different impedance amounts. A communications user allocated to a predefined coupling network can set the allocated predefined coupling network to each of its two operating states once or multiple times during the communications process.

Abstract: A communications system for a battery-management system of a battery includes coupling networks that are each connected or connectable via two input-side connections to a transmission channel, and via two output-side connections to a respective one of a plurality of communications users. The transmission channel can be used for the transmission of communications signals at a transmission frequency and that are to be transmitted and/or received by the communications users during a communications process between the communications users. At least one of the coupling networks has a first and second operating state, in which an input impedance that occurs between the two input-side connections of the respective predefined coupling network at the transmission frequency has two different impedance amounts. A communications user allocated to a predefined coupling network can set the allocated predefined coupling network to each of its two operating states once or multiple times during the communications process.

Abstract: The invention relates to a method for measuring an electric current of a battery (10) with multiple battery modules (11), having the step of measuring a temperature related to the battery module (11). According to the method, the temperature of a connector is first determined for at least one battery module (11) using the measured temperature and a temperature model, and the electric resistance of the connector is determined using a resistance model and the temperature of the connector. The electric voltage which drops at the connector is then measured, and the electric current flowing through the connector is calculated from the voltage. The invention additionally relates to a corresponding device and to a battery comprising such a device.