Abstract: A battery monitoring device includes a sensor device, which is electrically connectable to an automobile battery and may be placed thereon, and which is arranged to detect an operating variable of the battery. The battery monitoring device further includes a detection circuit, which is connected via a cable connection to the sensor device; and a data processing circuit, which is connected via a potential isolation circuit to the detection circuit. The potential isolation circuit provides isolation of the potential level of the detection circuit from a potential level of the data processing circuit for direct components.

Abstract: A DC/DC converter for providing an output voltage includes: a connected DC voltage transformer; a supply voltage input for providing a first supply potential and a second supply potential to the DC voltage transformer; a potential point which is connectable to the second supply potential as a function of an activation state of the DC voltage transformer; an output capacitor which is connected to an output connection and to the potential point, and which is chargeable to the output voltage by activating the DC voltage transformer, and at which an output potential is tappable. The output voltage is provided between the output potential and the second supply potential.

Abstract: A battery monitoring device includes a sensor device, which is electrically connectable to an automobile battery and may be placed thereon, and which is arranged to detect an operating variable of the battery. The battery monitoring device further includes a detection circuit, which is connected via a cable connection to the sensor device; and a data processing circuit, which is connected via a potential isolation circuit to the detection circuit. The potential isolation circuit provides isolation of the potential level of the detection circuit from a potential level of the data processing circuit for direct components.

Abstract: A DC/DC converter for providing an output voltage includes: a connected DC voltage transformer; a supply voltage input for providing a first supply potential and a second supply potential to the DC voltage transformer; a potential point which is connectable to the second supply potential as a function of an activation state of the DC voltage transformer; an output capacitor which is connected to an output connection and to the potential point, and which is chargeable to the output voltage by activating the DC voltage transformer, and at which an output potential is tappable. The output voltage is provided between the output potential and the second supply potential.

Abstract: A battery sensor unit having a fastening device for fastening the battery sensor unit to a contact of a battery, in particular a motor vehicle battery, and having a measuring section for acquiring the state of the battery, the measuring section and the fastening device being combined to form an integral assembly. The measuring section is fashioned in the shape of a cylinder. In addition, a method for connecting the fastening device of the battery sensor unit to the cylindrically fashioned measuring section is described.

Abstract: An electronic device having a housing is provided, the housing having an interior space surrounded by housing walls. A torroidal coil is arranged in the interior space. Furthermore, the housing has a lead-through region which extends from the top to the bottom of the housing. In the lead-through region, which is completely surrounded by the interior space, the torroidal coil, and the housing wall a current-conducting element is accommodated.

Abstract: A circuit configuration for monitoring the state of charge of an accumulator battery, which is installed in particular in a motor vehicle, has a control unit that records and evaluates the flow of current out of or into the accumulator battery. The control unit is able to be shifted into a state with low current consumption (sleep mode), out of which it may be brought again by an activation signal. Moreover, a sensor is provided that emits a signal in response to a flow of current out of or into the accumulator battery.

Abstract: A battery-condition detection which requires no current sensor. The battery is connected to a microprocessor via a circuit configuration. This circuit configuration includes means for the voltage measurement, means for the voltage comparison and, optionally, for the temperature measurement, as well as means for generating a trigger pulse. This trigger pulse generates a voltage pulse at the battery. After averaging or filtering, the pulse response is utilized for determining the complex internal resistance of the battery, from which the battery condition is then estimated.

Abstract: The circuit arrangement for generating square pulses according to a magnetic field strength has an edge-triggered flip-flop a comparator connected to the flip-flop; a bridge with four bridge segments, each including an electronically controlled switch, and with a transverse branch including an energy-storing element consisting of an inductive resistor acting as a magnetic field probe; and a switching threshold resistor connected with the energy-storing element and with a signal input of the comparator. The switches are each connected in pairs in crossover fashion by the flip-flop, so that current flow in the transverse branch is reversible. An improved compensation current sensor, which is less sensitive to component tolerances, includes the circuit arrangement for generating square pulses in a controller.

Abstract: A circuit configuration for monitoring the state of charge of an accumulator battery, which is installed in particular in a motor vehicle, has a control unit that records and evaluates the flow of current out of or into the accumulator battery. The control unit is able to be shifted into a state with low current consumption (sleep mode), out of which it may be brought again by an activation signal. Moreover, a sensor is provided that emits a signal in response to a flow of current out of or into the accumulator battery.

Abstract: A circuit arrangement for detecting a current through a consumer 16, which is disposed between the outputs 14c, 15c of two amplifiers 14, 15, which in order to be supplied with a unipolar operating voltage VCC, each have a supply voltage connection 14a, 15a and a ground connection 14b, 15b, is characterized in that between the connection 18a of the operating voltage source and the supply voltage connection 14a, 15a and/or between the ground connection 14b, 15b and ground 18b, an ohmic resistor 17 is provided, at which a voltage UA falls, which is proportional to the current to be detected.

Abstract: A circuit arrangement for generating square pulses has an edge-triggered flip-flop 1 and at least one comparator 2, whose output is connected to the trigger input of the flip-flop 1. An energy-storing element 3 is charged in alternation as a function of the switching state of the flip-flop 1. At least one switching threshold resistor 4 is connected in series with the energy-storing element 3, and a voltage generated by the current flowing through the energy-storing element 3 drops at this resistor. The voltage dropping at the switching threshold resistor is fed to the signal input of a comparator 2. The energy-storing element 3 is disposed in the transverse branch of a bridge, in each of whose four bridge segments a respective switch 7, 8, 9, 10 is disposed. The switches 7, 8, 9, 10 are each connected in pairs in crossover fashion by the flip-flop 1, so that the current flow in the transverse branch is reversible.

Abstract: A circuit arrangement for detecting a current through a consumer 16, which is disposed between the outputs 14c, 15c of two amplifiers 14, 15, which in order to be supplied with a unipolar operating voltage VCC, each have a supply voltage connection 14a, 15a and a ground connection 14b, 15b, is characterized in that between the connection 18a of the operating voltage source and the supply voltage connection 14a, 15a and/or between the ground connection 14b, 15b and ground 18b, an ohmic resistor 17 is provided, at which a voltage UA falls, which is proportional to the current to be detected.