Battery having a number of electrically interconnected with one another single cells and methods for maintenance, repair and / or optimization of such a battery

The invention relates to a battery comprising a number of series and / or parallel-connected to each other individual cells (1), wherein the electrical pole (1.2, 1.3) for electrical connection directly or by cell connectors (4) positively and / or materially connected to one another and a battery monitoring unit (10) which is connected to the electric poles (1.2, 1.3) and / or with the cell connectors (4) positively and / or materially bonded. According to the invention, or, the electrical poles (1.2, 1.3) of the individual cells (1), the cell connectors (4) for electrical interconnection of neighboring single cells (1) and / or the battery monitoring unit (10) each redundant contacting areas (K1, K2) for the form- - and / or material-locking connection, wherein only one of the mutually redundant contacting areas (K1, K2) positively and / or materially connected, wherein the one or more contacting areas (K1, K2) is not connected or are. Moreover, the invention relates to a process for the maintenance, repair and / or optimization of such a battery.