Cooling device of an electrical storage system and method using the cooling device

A condenser of a device for cooling at least one battery element of a motor vehicle, the condenser comprising:

• a main wall comprising a first thickness;
• a plurality of secondary walls configured to project from the main wall, where the plurality of secondary walls at least partially delimit a chamber configured to receive the at least one battery element, and where each secondary wall of the plurality of secondary walls comprises a second thickness;
• a cooling fluid circuit disposed in the first thickness of the main wall;
• and
• at least one dielectric fluid circuit disposed in the second thickness of each secondary wall of the plurality of secondary walls, the at least one dielectric fluid circuit comprising at least one nozzle for spraying a dielectric fluid in a liquid state on the at least one battery element,
• wherein the dielectric fluid is vaporized by the at least one battery element, thereby producing a vaporized dielectric fluid, and
• wherein the cooling fluid circuit is configured to circulate a cooling fluid through the main wall in order to reduce a temperature of the main wall such that the main wall liquefies the vaporized dielectric fluid when deposited thereon.