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 method and an array for measuring a primary current in a primary conductor that is magnetically coupled to a secondary conductor via a ferromagnetic core. In said method, a voltage having a specific amplitude is applied to the secondary conductor such that a secondary current flows for reversing the magnetization of the ferromagnetic core; the secondary current is measured while the magnetization of the ferromagnetic core is reversed in order to obtain a first measured value; the polarity of the voltage is reversed such that a secondary current flows for once again reversing the magnetization of the ferromagnetic core; the secondary current is measured while the magnetization of the core is reversed in order to obtain a second measured value; the primary current is calculated in accordance with the first and the second measured value, the polarity of the voltage being regularly reversed at a certain sensor frequency that is continuously varied.

Abstract: A device for charging a battery system having a number of individual voltage sources situated in a series circuit is provided, which device uses a voltage source and a respective bypass associated with each of the individual voltage sources. A charge current IL is supplied from the voltage source via the bypasses to the individual voltage sources as a function of their charge condition.

Abstract: Disclosed are a method and an array for measuring a primary current in a primary conductor that is magnetically coupled to a secondary conductor via a ferromagnetic core. In said method and array, the following is done; a voltage having a specific amplitude is applied to the secondary conductor such that a secondary current flows for reversing the magnetization of the ferromagnetic core; the secondary current is measured while the magnetization of the ferromagnetic core is reversed in order to obtain a first measured value; the polarity of the voltage is reversed such that a secondary current flows for once again reversing the magnetization of the ferromagnetic core; the secondary current is measured while the magnetization of the core is reversed in order to obtain a second measured value; the primary current is calculated in accordance with the first and the second measured value, the polarity of the voltage being regularly reversed at a certain sensor frequency that is continuously varied.

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 device for charging a battery system having a number of individual voltage sources situated in a series circuit is provided, which device uses a voltage source and a respective bypass associated with each of the individual voltage sources. A charge current IL is supplied from the voltage source via the bypasses to the individual voltage sources as a function of their charge condition.

Abstract: A monitoring device for monitoring a terminal of a terminal component in a power supply system is described, the terminal component being connectable to the power supply system and to a monitoring system via an electrical connection element, and the monitoring device comprising a voltage measuring device for detecting a voltage value of a voltage between a first terminal and a second terminal of the electrical connection element, the first terminal and the second terminal being connectable to the monitoring system, and an evaluation device for evaluating the voltage value, the evaluation device being designed to generate an indicating signal, which indicates a faulty connection to the power supply system if the voltage value differs from a predetermined voltage value.