Traction battery of a motor vehicle, having a plurality, of battery modules, wherein the battery modules of the traction battery are electrically coupled via electrical busbars (14, 15, 32, 33), wherein each battery module has a module housing and battery cells accommodated in the respective module housing, wherein the battery cells of each battery module are electrically coupled, wherein at least one heat conducting body (18, 19, 25, 26, 36) is arranged between the electrical busbars (14, 15, 32, 33), which serve for the electrical coupling of the battery modules, and an adjacent housing of the traction battery or an adjacent structural component of a body of the motor vehicle or an adjacent module housing of a battery module, characterised in that at least a first one of the electrical busbars (14, 15), which serve for the electrical coupling of the battery modules, has a busbar core (16, 23) made of an electrically conductive material and a busbar housing (17, 24) made of an electrically non-conductive material surrounding the busbar core (16, 23) on the outside, wherein a first heat conducting body (18, 25) is arranged between the busbar core (16, 23) and the busbar housing (17, 24) of the respective first electrical busbar (14, 15), a first heat conducting body (18, 25) being arranged, and wherein a second heat conducting body (19, 26) is arranged between the busbar core (16, 23) and the busbar housing (17, 24) of the respective first electrical busbar (14, 15) and the adjacent housing of the traction battery or the adjacent structural component of the body of the motor vehicle or the adjacent module housing of the respective battery module, and/or at least a second one of the electrical busbars- (32, 33), which serve for the electrical coupling of the battery modules, has a busbar core made of an electrically conductive material and a busbar sheath, which surrounds the busbar core on the outside and is made of an electrically non-conductive material and which bears directly against the busbar core of the respective second electrical busbar (32,.33), wherein a third heat conducting body is arranged between the busbar sheath of the respective electrical busbar (32, 33) and the adjacent housing of the traction battery or the adjacent structural component of the body of the motor vehicle or the adjacent module housing of the respective battery module. wherein each battery module has a module housing and battery cells accommodated in the respective module housing, wherein the battery cells of each battery module are electrically coupled, wherein at least one heat conducting body (18, 19, 25, 26, 36) is arranged between the electrical busbars (14, 15, 32, 33), which serve for the electrical coupling of the battery modules, and an adjacent housing of the traction battery or an adjacent structural component of a body of the motor vehicle or an adjacent module housing of a battery module, characterised in that at least a first one of the electrical busbars (14, 15), which serve for the electrical coupling of the battery modules, has a busbar core (16, 23) made of an electrically conductive material and a busbar housing (17, 24) made of an electrically non-conductive material surrounding the busbar core (16, 23) on the outside, wherein a first heat conducting body (18, 25) is arranged between the busbar core (16, 23) and the busbar housing (17, 24) of the respective first electrical busbar (14, 15), a first heat conducting body (18, 25) being arranged, and wherein a second heat conducting body (19, 26) is arranged between the busbar core (16, 23) and the busbar housing (17, 24) of the respective first electrical busbar (14, 15) and the adjacent housing of the traction battery or the adjacent structural component of the body of the motor vehicle or the adjacent module housing of the respective battery module, and/or at least a second one of the electrical busbars- (32, 33), which serve for the electrical coupling of the battery modules, has a busbar core made of an electrically conductive material and a busbar sheath, which surrounds the busbar core on the outside and is made of an electrically non-conductive material and which bears directly against the busbar core of the respective second electrical busbar (32,.33), wherein a third heat conducting body is arranged between the busbar sheath of the respective electrical busbar (32, 33) and the adjacent housing of the traction battery or the adjacent structural component of the body of the motor vehicle or the adjacent module housing of the respective battery module.