NOVELTY - The rechargeable electrical battery comprises two stacks (3, 4) of battery cells (5) lined up in a stacking direction. The stacks of battery cells are arranged adjacent to one another in a housing (12). Cooling air channels are arranged within the housing transverse to the stacking direction. The cooling air channels are present in a closed cooling air circuit for the refrigeration of the battery. The cooling air circuit comprises a cooling air fan (29) and a heat exchanger (30) that are arranged within the housing. The battery cell is surrounded by a plastic cell casing.    USE - The rechargeable electrical battery such as a high voltage battery is useful for an electric vehicle.    ADVANTAGE - The rechargeable electrical battery can be simply and economically manufactured with improved cooling performance, optimal operation conditions, long service life and good volumetric energy density.    DETAILED DESCRIPTION - The rechargeable electrical battery comprises two stacks (3, 4) of battery cells (5) lined up in a stacking direction. The stacks of battery cells are arranged adjacent to one another in a housing (12). Cooling air channels are arranged within the housing transverse to the stacking direction. The cooling air channels are present in a closed cooling air circuit for the refrigeration of the battery. The cooling air circuit comprises a cooling air fan (29) and a heat exchanger (30) that are arranged within the housing. The battery cell is surrounded by a plastic cell casing, which comprises a protruding sealing seam that is arranged approximately in an area of a cell center plane. A clearance is provided between the sealing seams of adjacent battery cells of the stack. A first cooling air channel is arranged towards a vertical axis of the battery, and a second cooling air channel is arranged towards a lateral axis of the battery formed perpendicular to the vertical axis and perpendicular to the stacking direction. The first and/or second cooling air channel is formed by the clearance. The sealing seam limiting the clearance or extending into the clearance forms a flow guide for the cooling air. A U-profile or Y-profile comprising cell connectors extends into the second cooling air channel for electrically connecting two adjacent battery cells. The housing comprises a cooling air supply path and a cooling air removal path that are arranged in a region of a first longitudinal side of the battery. The cooling air coming from the cooling air supply flow path, by the second cooling air channel, is partially led: in the region of a cell pole of the battery cell in the area of a top side of the battery; to a second longitudinal side of the battery facing away from the first longitudinal side; to a bottom side of the battery arranged between the second longitudinal side and the housing; and to the bottom of the battery arranged between a bottom plate of the battery and the housing for the first longitudinal side of the battery and for the cooling air removal path. A part of the cooling air coming from the second cooling air channel, by the first cooling air channel, is led to the bottom of the battery, on the underside of the battery and between the bottom plate of the battery and the housing for the first longitudinal side of the battery and for the cooling air removal path. A main sewer is formed between the bottom plate of the battery and the housing. The main sewer comprises a longitudinal rib, and a flow guide surface formed by the base plate and/or the housing.    DESCRIPTION OF DRAWING(S) - The figure 4a shows a schematic sectional view of a rechargeable electrical battery and figure 4b shows a schematic sectional view of a rechargeable electrical battery with a housing.    Stacks of battery cells (3, 4)    Battery cells (5)    Housing (12)    Cooling air fan (29)    Heat exchanger. (30)