US 11,938,781 B2
Vehicular heat management system
Hyeon Gyu Kim, Daejeon (KR); Doo Hoon Kim, Daejeon (KR); Kyung Ju An, Daejeon (KR); Byeong Ha Lee, Daejeon (KR); Jin Jae Lee, Daejeon (KR); and Joong Man Han, Daejeon (KR)
Assigned to Hanon Systems, Daejeon (KR)
Filed by Hanon Systems, Daejeon (KR)
Filed on Aug. 27, 2019, as Appl. No. 16/551,870.
Claims priority of application No. 10-2018-0101750 (KR), filed on Aug. 29, 2018; and application No. 10-2019-0103505 (KR), filed on Aug. 23, 2019.
Prior Publication US 2020/0070619 A1, Mar. 5, 2020
Int. Cl. B60H 1/00 (2006.01); B60H 1/22 (2006.01)
CPC B60H 1/00278 (2013.01) [B60H 1/00899 (2013.01); B60H 2001/00121 (2013.01); B60H 2001/2234 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vehicular heat management system, comprising:
a refrigerant circulation line configured to generate hot energy or cold energy depending on a flow direction of a refrigerant;
a heater core side coolant circulation line configured to transfer refrigerant heat generated on the side of a compressor of a refrigerant circulation line to a heater core to heat a passenger compartment;
a battery side coolant circulation line configured to receive coolant heat of the heater core side coolant circulation line via a coolant and then circulate the coolant through a battery to preheat the battery; and
wherein the system preheats the battery to a predetermined temperature or more in order to prevent the reduction of the charging and discharging efficiency of the battery and the reduction of the capacity and output of the battery;
wherein the battery side coolant circulation line includes a second heat exchanger configured to receive the coolant heat of the heater core side coolant circulation line, and a water pump configured to circulate the coolant between the second heat exchanger and the battery and introduce the coolant in the second heat exchanger, which has received the coolant heat of the heater core side coolant circulation line, toward the battery,
wherein the heat of the coolant of the heater core side coolant circulation line is transferred to the coolant of the battery side coolant circulation line to preheat the battery, and
wherein the battery is indirectly preheated by the heat of the coolant of the heater core side coolant circulation line, and
wherein the system further comprises:
a controller configured to variably control a rotational speed of the water pump of the battery side coolant circulation line depending on a temperature of the coolant of the battery side coolant circulation line, and
wherein the controller is configured to turn off the water pump of the battery side coolant circulation line when the temperature of the coolant of the battery side coolant circulation line exceeds a predetermined reference coolant temperature.