NOVELTY - The electrochemical accumulator comprises cylindrical shaped galvanic cells (2), a cover, a housing sealed by the cover, a connection pole for electrically contacting the accumulator, which is electrically connected to a group of the galvanic cells, an electrolyte in the housing, a cooling air space for receiving cooling air for cooling the cells, and a degassing space for receiving gas escaping from the cells during a failure. The cooling air space and the degassing space are separated from each other in a gas-permeable manner and are independently lead out of the housing.    USE - Electrochemical accumulator useful in hybrid or electric vehicle (claimed).    ADVANTAGE - The electrochemical accumulator has improved performance and safety, and high energy density.    DETAILED DESCRIPTION - The electrochemical accumulator comprises cylindrical shaped galvanic cells (2), a cover, a housing sealed by the cover, a connection pole for electrically contacting the accumulator, which is electrically connected to a group of the galvanic cells, an electrolyte in the housing, a cooling air space for receiving cooling air for cooling the cells, and a degassing space for receiving gas escaping from the cells during a failure. The cooling air space and the degassing space are separated from each other in a gas-permeable manner and are independently lead out of the housing. Cooling air space channels (7) are lead out outside of the cells at the mantle of the cells. The degassing space comprises cylindrical areas that are arranged outside of the cells on the base- or cover area of the cells. The cells comprise release valves over which the interior space of the cells are connected with the degassing space in such a way that the gas is escaped from the interior space of the cells in the degassing space. The release valves are locked with releasing membranes. A carrier is intended in the housing in which the cells are supported in assembled state. The cells are lithium-iron cells. An INDEPENDENT CLAIM is included for a vehicle with electrochemical accumulator.    DESCRIPTION OF DRAWING(S) - The figure shows an enlarged view of a galvanic cell.    Galvanic cell (2)    Carrier (3)    Cooling air space channels (7)    Mantle (14)    Cool air. (16, 17)