Abstract: A control device of a battery storage device, preferably a control device for and/or in a high-voltage battery storage device of an electric vehicle, wherein modules (Mod 1, . . . , Mod 16) are interconnected in the battery storage device via electromechanical components, e.g. in the form of contactors, fuses, and busbars, and are connected to a battery management system for controlling charging and discharging. In order to create a control device for a battery storage device by means of which the string currents are measured with a high degree of accuracy, it is proposed that in addition to a sensor for a total current, the control device is also connected to a sensor, which is embodied to measure a differential current between two strings.

Abstract: A control method for an HV contactor and a control unit for the implementation thereof in a battery storage device, preferably a battery storage device of an electric vehicle, wherein in the battery storage device, modules are interconnected via electromechanical components in the form of contactors, fuses, and busbars and are connected to a battery management system for controlling charging and discharging, wherein at least one respective contactor is provided for potential-free isolation at external electrical terminals. The control unit uses HV contactors installed bidirectionally in a positive and negative path of the high-voltage battery storage device to trigger an opening actuation of an HV contactor in order to interrupt a current flow only in a preferred direction of the respective contactor.

Abstract: A control method for an HV contactor and a control unit for the implementation thereof in a battery storage device, preferably a battery storage device of an electric vehicle, wherein in the battery storage device, modules are interconnected via electromechanical components in the form of contactors, fuses, and busbars and are connected to a battery management system for controlling charging and discharging, wherein at least one respective contactor is provided for potential-free isolation at external electrical terminals. The control unit uses HV contactors installed bidirectionally in a positive and negative path of the high-voltage battery storage device to trigger an opening actuation of an HV contactor in order to interrupt a current flow only in a preferred direction of the respective contactor.