US 12,483,183 B2
Oil temperature control system for electric vehicle
Jong Won Kim, Cheonan-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Jun. 5, 2023, as Appl. No. 18/329,282.
Claims priority of application No. 10-2023-0015301 (KR), filed on Feb. 6, 2023.
Prior Publication US 2024/0266986 A1, Aug. 8, 2024
Int. Cl. H02P 29/62 (2016.01); B60K 1/02 (2006.01); B60K 17/356 (2006.01); B60K 23/08 (2006.01); B60L 7/10 (2006.01); B60L 15/20 (2006.01); B60K 1/00 (2006.01)
CPC H02P 29/62 (2016.02) [B60K 1/02 (2013.01); B60K 17/356 (2013.01); B60K 23/0808 (2013.01); B60L 7/10 (2013.01); B60L 15/2045 (2013.01); B60K 2001/006 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/425 (2013.01); B60L 2240/525 (2013.01); B60L 2250/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oil temperature control system for an electric vehicle, the system comprising:
a heat exchange unit configured to perform heat exchange between an oil used to cool a driving motor and a coolant in the electric vehicle;
a temperature sensor comprising an oil temperature sensor configured to detect a temperature of the oil in the driving motor or an outside air temperature sensor configured to detect a temperature of outside air;
a controller configured to:
receive a signal from the temperature sensor to determine, based on the temperature detected by the temperature sensor, whether a heat generation mode entry condition to cause a power electronic part to generate heat is satisfied; and
operate the power electronic part in a heat generation mode in response to a determination that the heat generation mode entry condition is satisfied; and
a cooling system configured to allow the coolant used to cool the power electronic part operating in the heat generation mode to circulate through a passage penetrating the heat exchange unit so that the coolant exchanges heat with the oil in the heat exchange unit,
wherein:
the power electronic part comprises an inverter connected to the driving motor to apply three-phase alternating current to the driving motor, and
the controller is further configured to change a switching frequency of the inverter for the driving motor to a switching frequency set for the heat generation mode.