NOVELTY - The battery box comprises an outer envelope defining a receiving chamber between a bottom, sides and a cover, an inner partitioning system (33) delimiting compartments inside the chamber and extending between the bottom and the cover of the outer envelope, accumulator blocks (43) that are arranged in the compartments and comprise an insulating housing (44) for receiving an electrical energy accumulator set, an electronic device disposed in a secondary compartment communicating with compartments and connected with accumulators blocks, and a bowl-shaped support.    USE - The battery box is useful for an electric vehicle or a hybrid vehicle.    ADVANTAGE - The battery box can be easily and economically manufactured with excellent mechanical properties and simple and compact design thus can be easily assembled inside the electric vehicle.    DETAILED DESCRIPTION - The battery box comprises an outer envelope defining a receiving chamber between a bottom, sides and a cover, an inner partitioning system (33) delimiting compartments inside the chamber and extending between the bottom and the cover of the outer envelope, accumulator blocks (43) that are arranged in the compartments and comprise an insulating housing (44) for receiving an electrical energy accumulator set, an electronic device disposed in a secondary compartment communicating with compartments and connected with accumulators blocks, a bowl-shaped support, and a hallow outer housing for receiving a removable member of a disconnector connected with the battery. The inner partitioning system and the insulating housings of the accumulator blocks are arranged in such a way so as to delimit an inner space (53) between the insulating housings of the accumulator blocks and the outer envelope. The inner partitioning system comprises: slots (41) for communication between compartments that are open towards the periphery of the inner partitioning system; electrical connection cables or wires that are connected to the accumulator blocks in series, extend into the inner space and pass through the slots; a setting unit; a beam; and barriers placed on both sides of the beam. The slots are opened on the side of the cover. The electronic device comprises an external connection unit. The compartments are formed one above the other. The outer envelope comprises an inlet orifice and an outlet orifice, which is communicated with the inner space for the flow of a cooling gas through the compartments, and is provided on a part of an external protection layer.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic perspective view of a battery box.    Inner partitioning system (33)    Slots (41)    Accumulator blocks (43)    Insulating housing (44)    Inner space. (53)