NOVELTY - The battery block comprises a battery unit (8) including stacked electrical battery elements (9), a flexible parallelepiped housing that defines a chamber (7) for receiving the battery unit and includes a main housing (3) and a secondary housing (4) having peripheral assembly edges, electrical connection members, a sealing unit disposed between peripheral edges of the main and secondary housings, and a unit for connecting the main and secondary housings. A unit for electrically connecting the elements is arranged on one side of the elements, and has terminals.    USE - The battery block is useful for electric vehicle or hybrid vehicle.    ADVANTAGE - The compact battery block can be easily and economically manufactured with light weight, and enhances the efficiency of the electric vehicle or hybrid vehicle.    DETAILED DESCRIPTION - The battery block comprises a battery unit (8) including stacked electrical battery elements (9), a flexible parallelepiped housing that defines a chamber (7) for receiving the battery unit and includes a main housing (3) and a secondary housing (4) having peripheral assembly edges, electrical connection members, a sealing unit disposed between peripheral edges of the main and secondary housings, and a unit for connecting the main and secondary housings. A unit for electrically connecting the elements is arranged on one side of the elements, and has terminals for electrically connecting to the battery unit. The housings are provided with a unit for stacking the battery elements into the main housing, and a unit for bearing against a wall of the housings. The secondary housing is located on the electrical connection unit side, and has hallow outer form for receiving the electrical connection members. The electrical connection members: are connected to connecting terminals of the battery unit and provided with a holding unit; extend into the receiving chamber; and pass through passages of the wall of the secondary housing. The holding unit is connected to the edges of the through-passages of the wall of the secondary housing. The battery unit is partially displaced in the housing through direct support and/or intermediate unit. The battery elements comprise stacked plates. The electrical connection members are further placed in the battery elements, and connected with a negative terminal of the battery by a fuse installed in the housing. The sealing unit is further disposed between the electrical connection members and edges of the pass through passages of the secondary housing. The electrical connection members comprise: a base that is fixed on the edge of the pass through passages of the secondary housing, is equipped with an electronic contact unit connected with the terminals and is adapted to be coupled with contact unit of an external plug-in member; an electric cable; and a flexible part in the housing. The external plug-in member is connected with external electric cable and a printed circuit card. The connection unit comprises external tabs, and bearing bosses that penetrate in orifices of the tabs when the main and secondary housings are assembled. The tabs and bosses extend inside a hollow zone. The flexible part is formed of an electrically conductive braid.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a battery block.    Main housing (3)    Secondary housing (4)    Chamber (7)    Battery unit (8)    Stacked electrical battery elements. (9)