US 11,904,728 B2
Thermal management system for battery pack and thermal management system for electric vehicle
Yanru Li, Ningde (CN); Xingyuan Wu, Ningde (CN); Guowei Li, Ningde (CN); Wei Zhang, Ningde (CN); Zhimin Dan, Ningde (CN); and Xiyang Zuo, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on Aug. 27, 2021, as Appl. No. 17/458,640.
Application 17/458,640 is a continuation of application No. PCT/CN2020/075861, filed on Feb. 19, 2020.
Claims priority of application No. 201910152153.0 (CN), filed on Feb. 28, 2019.
Prior Publication US 2021/0387548 A1, Dec. 16, 2021
Int. Cl. H01M 10/6568 (2014.01); B60L 58/26 (2019.01); B60H 1/00 (2006.01); H01M 10/6563 (2014.01)
CPC B60L 58/26 (2019.02) [B60H 1/00392 (2013.01); B60H 1/00485 (2013.01); H01M 10/6568 (2015.04); H01M 10/6563 (2015.04)] 9 Claims
 
1. A thermal management system for a battery pack of an electric vehicle, comprising:
a thermal management device (11) for the battery pack, a processor (12), a solenoid valve network (13) connected to the thermal management device (11) for the battery pack, and an external cooling system (2);
characterized in that
the thermal management device (11) for the battery pack comprises:
a first heat exchanger (111), wherein a first end of the first heat exchanger (111) is connected to the second valve port of the second solenoid valve (132), and a second end of the first heat exchanger (111) is connected to a first end of a second heat exchanger (112) and the second valve port of the third solenoid valve (133);
the second heat exchanger (112), wherein a second end of the second heat exchanger (112) is connected to a first end of a first water pump (113);
the first water pump (113), wherein a second end of the first water pump (113) is connected to the second valve port of the fourth solenoid valve (134); and
a first cooling system (114), wherein the first cooling system (114) is connected to the second heat exchanger (112) and is configured to absorb heat transferred by the second heat exchanger (112), so as to cool the battery pack;
the thermal management system further comprises an external port of the solenoid valve network (13) is connected to the external cooling system (2);
wherein the solenoid valve network (13) comprises:
a first solenoid valve (131), wherein a first valve port of the first solenoid valve (131) and a second valve port of the first solenoid valve (131) are both connected to the external cooling system (2);
a second solenoid valve (132), wherein a first valve port of the second solenoid valve (132) is connected to the first valve port of the first solenoid valve (131), and a second valve port of the second solenoid valve (132) is connected to a thermal management module for the battery pack;
a third solenoid valve (133), wherein a first valve port of the third solenoid valve (133) is connected to the second valve port of the first solenoid valve (131), and a second valve port of the third solenoid valve (133) is connected to the thermal management module for the battery pack;
a fourth solenoid valve (134), wherein a first valve port of the fourth solenoid valve (134) is connected to the external cooling system (2), and a second valve port of the fourth solenoid valve (134) is connected to a first valve port of a fifth solenoid valve (135) and the thermal management module for the battery pack; and
the fifth solenoid valve (135), wherein a second valve port of the fifth solenoid valve (135) is connected to the second valve port of the second solenoid valve (132), wherein
the external port comprises the first valve port of the first solenoid valve (131), the second valve port of the first solenoid valve (131), and the first valve port of the fourth solenoid valve (134);
the external cooling system (2) is an electric motor and control cooling system (3), and the electric motor and control cooling system (3) comprises a cooler (31), a second water pump (32), an electric control device (33), and an electric motor (34);
the first valve port of the first solenoid valve (131) is connected to a first end of the electric motor (34), and a second end of the electric motor (34) is connected to a first end of the electric control device (33);
the second valve port of the first solenoid valve (131) is connected to an inlet of the cooler (31), and an outlet of the cooler (31) is connected to a first end of the second water pump (32); and
the first valve port of the fourth solenoid valve (134) is connected to a second end of the second water pump (32) and a second end of the electric control device (33); and
under a condition that the electric motor (34) and the electric control device (33) need to be cooled and the battery pack needs to be heated, the processor (12) is configured to control the first solenoid valve (131), the fourth solenoid valve (134), and the fifth solenoid valve (135) to be in a closed state, control the second solenoid valve (132) and the third solenoid valve (133) to be in an open state, and control the second water pump (32) to be in a started state.