NOVELTY - The battery cell (10) has a housing (11) that includes two opposite polarity terminals (15,16) which are arranged on two opposite side surfaces (13,14). The contact surfaces of the terminals comprise an intermediate element which is inserted into a plug-in element or a receptacle. One of the opposite polarity terminals is arranged on one of the opposite side surfaces of the housing, and other opposite polarity terminals is arranged on other opposite side surfaces of the housing.    USE - Battery cell e.g. lithium-ion battery cell of battery module for battery system of motor vehicle (all claimed) such hybrid electric vehicle (HEV) and electric vehicle (EV).    ADVANTAGE - The usually required cell connectors for the interconnection of the battery cells are omitted. The battery modules are usually clamped to minimize swelling of the cells, and the performance and the battery life are increased. The self-centering during assembly is allowed by receiving the plug element in a form-fitting manner. The interconnection of the battery cells together in a desired manner is allowed. The electrically insulating contact of two images of adjacent battery cells is prevented. The connection of the battery cells is carried out simply by juxtaposition of the battery cells in a desired way. The required contact normal force is applied, or the contact resistance between the cell terminals is minimized. The complex joining processes such as ultrasonic, resistance welding and screws are eliminated. The additional connection elements such as cell connectors, bus bars, studs and nuts, are discarded. The required installation steps in the assembly of the modules, is reduced. The cell terminals are shielded between cells and no hazard potential with respect to the touching is offered. Therefore, no further action to isolation is required. The additional elements are omitted to protect against contact. The requirement of compensation of dimensional tolerances between the cell terminals is eliminated. The modular design is made possible. The saving costs with non-detachable connectors are significantly reduced, since the whole module is replaced constantly.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a battery module; and    (2) a motor vehicle.    DESCRIPTION OF DRAWING(S) - The drawings show the perspective views of the battery cell.    Battery cell (10)    Housing (11)    Cylindrical housing (12)    Opposite side surfaces (13,14)    Polarity terminals (15,16)