CN-121989623-A - Cooling liquid multi-path control system, thermal management system, vehicle and thermal management method

CN121989623ACN 121989623 ACN121989623 ACN 121989623ACN-121989623-A

Abstract

The application relates to the technical field of vehicles, in particular to a cooling liquid multipath control system, a thermal management system, a vehicle and a thermal management method, wherein the cooling liquid multipath control system comprises a first switch assembly, a second switch assembly, a multiway valve and a multiway valve, wherein the input end of the first switch assembly is connected with the first cooling liquid output end of a vehicle cooling module, the first input end of the second switch assembly is connected with the output end of the first switch assembly, the output end of the second switch assembly is connected with the cooling liquid input end of a power battery of the vehicle, the input end of the multiway valve is connected with the cooling liquid output end of a motor module of the vehicle, and the first output end of the multiway valve is connected with the cooling liquid input end of the vehicle cooling module. Therefore, the problems that the heat management system is complex in structure, the cooling loops of the modules are mutually independent and the energy utilization efficiency is low are solved, the working mode can be flexibly switched according to the heat management requirement through simple pipeline layout, the energy utilization efficiency is improved, and the quick heat management response capability is achieved.

Inventors

ZHU TIANLONG
LOU XUKUAN
SUN ZHIYANG
QIN ZHIDONG
YAN KANGKANG
ZHANG SHUANLU
BIAN LEI
DI JINRUI
ZHANG ZHIYUN
WANG QI
HU HENGWEI

Assignees

北京卡文新能源汽车有限公司

Dates

Publication Date: 20260508
Application Date: 20260210

Claims (10)

1. A coolant multiplexing control system, comprising: The input end of the first switch assembly is connected with the first cooling liquid output end of the vehicle cooling module; The first input end of the second switch assembly is connected with the output end of the first switch assembly, and the output end of the second switch assembly is connected with the cooling liquid input end of the power battery of the vehicle; The input end of the multi-way valve is connected with the cooling liquid output end of the motor module of the vehicle, and the first output end of the multi-way valve is connected with the cooling liquid input end of the cooling module of the vehicle.
2. The coolant multiplexing control system of claim 1, further comprising: the input end of the first heat exchange component is connected with the second output end of the multi-way valve; The input end of the heating component is connected with the output end of the first heat exchange component, and the output end of the heating component is connected with the second input end of the second switch component.
3. A thermal management system, comprising: A vehicle cooling module; and the coolant multiplexing control system according to any one of claims 1 to 2.
4. The thermal management system of claim 3, wherein the vehicle cooling module comprises: A water pump, The first input end of the second heat exchange component is connected with the output end of the water pump, and the first output end of the second heat exchange component is connected with the first cooling liquid input end of the cooling liquid multi-path control system; the input end of the condensing piece is connected with the first output end of the second heat exchange component; The input end of the compression piece is connected with the output end of the condensation piece; The input end of the evaporation piece is connected with the output end of the compression piece, and the output end of the evaporation piece is connected with the second input end of the second heat exchange assembly.
5. The thermal management system of claim 3, further comprising a motor module, the motor module comprising: The cooling liquid input end of the motor controller is connected with the second cooling liquid output end of the vehicle cooling module; the cooling liquid input end of the driving motor is connected with the cooling liquid output end of the motor controller, and the cooling liquid output end of the driving motor is connected with the second cooling liquid input end of the cooling liquid multi-path control system.
6. The thermal management system of claim 3, further comprising a fuel cell thermal management module comprising a fuel cell, a fuel cell thermostat, a third heat exchanger assembly, and a fuel cell heat sink, wherein, The input end of the fuel cell temperature-saving part is connected with the cooling liquid output end of the fuel cell, the first output end of the fuel cell temperature-saving part is connected with a cooling liquid flow path between the fuel cell and the fuel cell heat dissipation part, the input end of the third heat exchange component is connected with the second output end of the fuel cell temperature-saving part, the input end of the fuel cell heat dissipation part is connected with the output end of the third heat exchange component, and the first output end of the fuel cell heat dissipation part is connected with the cooling liquid input end of the fuel cell.
7. The thermal management system of claim 6, wherein the third heat exchange assembly is a plate-type integral heat exchange member with the first heat exchange assembly.
8. The thermal management system of claim 3, further comprising an air conditioning system, wherein a cold side of the air conditioning system is coupled to a third coolant output of the vehicle cooling module, wherein a hot side of the air conditioning system is coupled to a second output of the third heat exchange assembly, and wherein a coolant output of the air conditioning system is coupled to a coolant input of the vehicle cooling module.
9. A vehicle comprising the thermal management system of any of claims 3-8.
10. A method of thermal management, wherein the method is applied to a thermal management system according to any one of claims 3-8, wherein the method comprises the steps of: judging whether a thermal management requirement exists or not; Determining a first target state of the first switch assembly and a second target state of the multi-way valve according to the thermal management demand if the thermal management demand exists; the first switch assembly is controlled according to the first target state, and the multi-way valve is controlled according to the second target state, so that the power battery of the vehicle is heated or cooled.

Description

Cooling liquid multi-path control system, thermal management system, vehicle and thermal management method Technical Field The application relates to the technical field of vehicles, in particular to a cooling liquid multipath control system, a thermal management system, a vehicle and a thermal management method. Background Along with the continuous increase of the power of a motor of a vehicle, the power density of a fuel cell system and a power cell is increased, so that the heat load of the vehicle is obviously increased, the thermal management of the vehicle becomes complicated, the power cell cannot output larger power under the condition of low temperature due to the material characteristics of the power cell, the power cell needs to be heated, the power cell needs to be cooled when the temperature is higher, the fuel cell can be started after being heated to a certain temperature due to the material characteristics of a proton exchange membrane, and the power cell also needs to be cooled when the temperature is higher. In the related art, fuel cell vehicles generally employ a discrete thermal management architecture, i.e., a plurality of independent cooling circuits are provided to serve the fuel cell stack, the power cells, the motor/electric control and the air conditioning system, respectively. For example, the power battery is connected to the small radiator or the PTC heater through an independent liquid cooling loop to realize heating or cooling, the fuel battery stack is connected with the main radiator and the water pump through another set of closed loop and is provided with a thermostat to maintain the working temperature, and the motor and the electric control share a third cooling loop and are directly connected to the main radiator to dissipate heat. And the loops are basically free from thermal coupling, the control logics are mutually independent, and the flow and the temperature are respectively regulated by depending on a plurality of sensors and controllers. However, the related art has the following defects of (1) complex structure of the thermal management system, large number of parts, high assembly and maintenance cost, difficult troubleshooting and maintenance, low integration level, energy waste caused by incapability of communicating all loops, difficult uniform coordination due to response lag, and difficult realization of accurate temperature control of key parts such as fuel cells, power cells, motors and the like due to response lag during multi-working condition switching. Disclosure of Invention The application provides a cooling liquid multipath control system, a thermal management system, a vehicle and a thermal management method, which are used for solving the problems that cooling loops of modules in the thermal management system are mutually independent, the energy utilization efficiency is low and the battery preheating energy consumption is high in a low-temperature environment. An embodiment of a first aspect of the present application provides a coolant multiplexing control system, including: The input end of the first switch assembly is connected with the first cooling liquid output end of the vehicle cooling module; The first input end of the second switch assembly is connected with the output end of the first switch assembly, and the output end of the second switch assembly is connected with the cooling liquid input end of the power battery of the vehicle; The input end of the multi-way valve is connected with the cooling liquid output end of the motor module of the vehicle, and the first output end of the multi-way valve is connected with the cooling liquid input end of the cooling module of the vehicle. Optionally, in some embodiments, the above coolant multiplexing control system further includes: the input end of the first heat exchange component is connected with the second output end of the multi-way valve; The input end of the heating component is connected with the output end of the first heat exchange component, and the output end of the heating component is connected with the second input end of the second switch component. Embodiments of the second aspect of the present application provide a thermal management system comprising: A vehicle cooling module; and, a coolant multiplexing control system as described above. Optionally, in some embodiments, the vehicle cooling module comprises: A water pump, The first input end of the second heat exchange component is connected with the output end of the water pump, and the first output end of the second heat exchange component is connected with the first cooling liquid input end of the cooling liquid multi-path control system; the input end of the condensing piece is connected with the first output end of the second heat exchange component; The input end of the compression piece is connected with the output end of the condensation piece; The input end of the evaporation piece is connected with the output