NOVELTY - Battery assembly (1) comprises at least a first block of rechargeable battery cell members (3) that are arranged side by side in at least one row and that are electrically configured in parallel, where each cell member (3) has a first and a second electrode terminal; a printed circuit board (PCB) (10) provided with an electronic circuit configured to monitor, control and/or balance the first block of cell members (3); and interconnecting means (8) arranged to connect the first electrode terminals electrically to each other and to the PCB (10).    USE - The battery assembly is used in vehicles.    ADVANTAGE - The assembly is an improved rechargeable battery assembly for applications requiring a relatively high power, such as driving of vehicles.    DETAILED DESCRIPTION - Battery assembly (1) comprises at least a first block of rechargeable battery cell members (3) that are arranged side by side in at least one row and that are electrically configured in parallel, where each cell member (3) has a first and a second electrode terminal; a printed circuit board (PCB) (10) provided with an electronic circuit configured to monitor, control and/or balance the first block of cell members (3); interconnecting means (8) arranged to connect the first electrode terminals electrically to each other and to the PCB (10). The interconnecting means comprises a first supporting metal plate (6) that: extends along the at least one row of cell members (3); is mechanically fixed to the first block of cell members (3); is electrically connected to the first electrode terminal of each of the cell members (3) in the first block of cell members; and that is mechanically fixed to the PCB (10) via a mechanical fixation that also provides an electric connection between the first metal plate (6) and the PCB (10). An INDEPENDENT CLAIM is a battery system comprising battery assemblies.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a battery assembly.    Battery assembly (1)    Cell member (3)    Display means (5)    First metal plate (6)    Interconnecting means (8)    PCB (10)