A COOLING SYSTEM FOR AN ELECTRIC POWER UNIT IN A VEHICLE

• Main Author: MUSTONEN, Markus
• Format: Patent
• Language: English; French; German
• Published: 08.04.2020
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STEAM ENGINES; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The present invention relates to a cooling system for an electric power unit in a vehicle (1). The cooling system comprises a high temperature cooling circuit (6) with a circulating coolant cooling power electronics (5), a first radiator (8) arranged in the high temperature cooling circuit (6), a low temperature cooling circuit (15) with a circulating coolant cooling an electric energy storage (4) and a second radiator (17) arranged in the low temperature cooling circuit (15). The cooling system comprises first flow means (18, 19) able to direct coolant in the low temperature cooling circuit (15) past the second radiator (17) and second flow means (36-39) able to direct coolant in the high temperature cooling circuit to the first radiator (8) where it is cooled in a first step and then to the second radiator (17) where it is cooled in a second step before it is used to cool the power electronics (5).