NOVELTY - The battery system that has an output voltage of more than 60 V of direct current voltage, comprises several voltage sources (3) each having an output voltage of less than 60 V and each including a contact, via which the voltage sources are connected in series by reversible, interruptible conductive connections (5), and a battery housing, in which the voltage sources are arranged, where a reversible, interruptible conductive connection is functionally designed such that a series circuit of the voltage sources is created by the conductive connection when the battery housing is closed.    USE - Battery system useful in a consumer e.g. motor vehicles (all claimed), electrical hybrid vehicles, plug-in hybrid vehicles, electric vehicles, fuel cell vehicles and other vehicles that constitute electrochemical energy storage for electrical energy supply.    ADVANTAGE - The battery system can be efficiently produced with increased effort to protect against electrical voltages and less maintenance costs, drastically reduces the risk of injury by contacting with high electrical voltages, and can be safely maintained or serviced.    DETAILED DESCRIPTION - The battery system that has an output voltage of more than 60 V of direct current voltage, comprises several voltage sources (3) each having an output voltage of less than 60 V and each including a contact, via which the voltage sources are connected in series by reversible, interruptible conductive connections (5), and a battery housing, in which the voltage sources are arranged, where a reversible, interruptible conductive connection is functionally designed such that a series circuit of the voltage sources is created by the conductive connection when the battery housing is closed and a series circuit of the voltage sources is reversibly interruptible upon an opening of the battery housing. The voltage sources are functionally designed, so that the voltage sources are connected in series by conductive connections. One of the voltage sources comprises more than one cell of a battery type with an output voltage of less than 60 V, where the cells are connected in series to the voltage sources. The voltage sources are arranged in two planes in the battery housing, where one plane has more than one voltage source. The voltage sources of the two planes are connected in series by the conductive connections and the conductive connection is reversibly interruptibly arranged between the two planes simultaneously with the conductive connection between the voltage sources of one plane. The battery housing is functionally implemented, so that a series circuit of the voltage sources is reversibly interruptible by the conductive connection before the battery housing is opened such that the conductive connection is penetrated into the interior of the battery housing with an object. The battery housing is constructed in two-piece and has an openable lid (1), where the conductive connection is connected with the lid, so that the series circuit of the voltage sources is reversibly interruptible by the conductive connection during opening the lid. The reversible, interruptible conductive connection is arranged as plug connection, press connection or screw connection.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a battery system with closed battery housing.    Housing lid (1)    Housing part (2)    Voltage sources (3)    Conductive connections. (5)