CN-122008839-A - Hybrid electric vehicle thermal management system and control method

Abstract

The invention belongs to the technical field of automobile heat management, and particularly relates to a hybrid electric vehicle heat management system and a control method, wherein the hybrid electric vehicle heat management system comprises a controller, an intercooling loop, a motor cooling loop and a first conversion loop connected between the intercooling loop and the motor cooling loop; the controller is used for controlling the start and stop of the intercooling loop and the motor cooling loop, and is also used for controlling the first conversion loop to be communicated with the intercooling loop and the motor cooling loop so that cooling liquid in the intercooling loop and cooling liquid in the motor cooling loop can be mutually exchanged, or controlling the first conversion loop to be disconnected with the intercooling loop and the motor cooling loop so that the intercooling loop and the motor cooling loop respectively and independently operate.

Inventors

• SONG HAN
• XU ZIQIANG
• LAI YANG
• ZHOU SONGTAO
• LI ZIXIN

Assignees

• 东风汽车集团股份有限公司

Dates

Publication Date

20260512

Application Date

20260202

Claims (16)

1. 1. A hybrid vehicle thermal management system is characterized by comprising a controller, an intercooling circuit, a motor cooling circuit and a first conversion circuit connected between the intercooling circuit and the motor cooling circuit; The controller is used for controlling the start and stop of the intercooling loop and the motor cooling loop; The controller is further used for controlling the first conversion circuit to be communicated with the intercooling circuit and the motor cooling circuit, so that cooling liquid in the intercooling circuit and cooling liquid in the motor cooling circuit can be mutually exchanged, or controlling the first conversion circuit to be disconnected from the intercooling circuit and the motor cooling circuit, so that the intercooling circuit and the motor cooling circuit can independently operate.
2. 2. The hybrid vehicle thermal management system of claim 1, wherein the charge air cooler circuit comprises an air cooler, a first coolant line connected between a liquid inlet and a liquid outlet of the air cooler, and a charge air cooler and a first water pump mounted on the first coolant line; the motor cooling loop comprises a low-temperature radiator, a second cooling liquid pipe connected between a liquid inlet and a liquid outlet of the low-temperature radiator, and a motor and a second water pump which are arranged on the second cooling liquid pipe; The first conversion loop comprises a first communication pipeline connected between a liquid inlet of the air-cooled radiator and a liquid inlet of the low-temperature radiator, a second communication pipeline connected between a liquid outlet of the air-cooled radiator and a liquid outlet of the low-temperature radiator, a first valve installed on the first communication pipeline, a second valve installed on the second communication pipeline, and a third water pump installed on the first communication pipeline or the second communication pipeline; the controller is used for controlling the opening and closing of the first valve and the second valve, and the starting and stopping of the first water pump, the second water pump and the third water pump.
3. 3. The hybrid vehicle thermal management system of claim 2, further comprising an engine cooling circuit, and a second conversion circuit connected between the charge-to-cold circuit and the engine cooling circuit; the controller is also used for controlling the start and stop of the engine cooling loop; The controller is further configured to control the second switching circuit to communicate the intercooler circuit with the engine cooling circuit, so that the coolant in the intercooler circuit and the coolant in the engine cooling circuit can exchange with each other, or control the second switching circuit to disconnect the intercooler circuit from the engine cooling circuit, so that the intercooler circuit and the engine cooling circuit each independently operate.
4. 4. The hybrid vehicle thermal management system of claim 3, wherein said engine cooling circuit comprises a high temperature radiator, a third coolant line connected between a liquid inlet and a liquid outlet of said high temperature radiator, and an engine and a fourth water pump mounted on said third coolant line; The second conversion loop comprises a third communication pipeline connected between the liquid inlet of the high-temperature radiator and the liquid inlet of the low-temperature radiator, a fourth communication pipeline connected between the liquid outlet of the high-temperature radiator and the liquid outlet of the low-temperature radiator, a third valve installed on the third communication pipeline, a fourth valve installed on the fourth communication pipeline, and a fifth water pump installed on the third communication pipeline or the fourth communication pipeline; the controller is also used for controlling the opening and closing of the third valve and the fourth valve and the starting and stopping of the fourth water pump and the fifth water pump.
5. 5. The hybrid vehicle thermal management system according to claim 4, further comprising a fifth communication pipe, a sixth communication pipe, and a sixth water pump installed on the fifth communication pipe or the sixth communication pipe; the first valve, the second valve, the third valve and the fourth valve are all three-way valves; the first communication pipeline comprises a first pipe section connected between the liquid inlet of the air-cooled radiator and the first interface of the first valve, and a second pipe section connected between the liquid inlet of the low-temperature radiator and the second interface of the first valve; the second communication pipeline comprises a third pipe section connected between the liquid outlet of the air-cooled radiator and the third interface of the second valve, and a fourth pipe section connected between the liquid outlet of the low-temperature radiator and the fourth interface of the second valve; The third communication pipeline comprises a fifth pipe section connected between the liquid inlet of the high-temperature radiator and the fifth interface of the third valve, and a sixth pipe section connected between the liquid inlet of the low-temperature radiator and the sixth interface of the third valve; the fourth communication pipeline comprises a seventh pipe section connected between the liquid outlet of the high-temperature radiator and the seventh interface of the fourth valve, and an eighth pipe section connected between the liquid outlet of the low-temperature radiator and the eighth interface of the fourth valve; the fifth communication pipeline is connected between a ninth interface of the first valve and an eleventh interface of the third valve; The sixth communication pipeline is connected between a tenth port of the second valve and a twelfth port of the fourth valve; The third water pump is arranged on the second pipe section or the fourth pipe section, the fifth water pump is arranged on the sixth pipe section or the eighth pipe section, and the controller is also used for controlling the start and stop of the sixth water pump.
6. 6. A control method based on the hybrid vehicle thermal management system according to any one of claims 1 to 2, characterized by comprising: And selecting the working mode of the hybrid vehicle thermal management system according to the received first working mode selection information by using the controller, and controlling an inter-cooling loop, a motor cooling loop and a first conversion loop of the hybrid vehicle thermal management system to execute the function of the selected working mode.
7. 7. A control method based on the hybrid vehicle thermal management system according to any one of claims 3 to 4, characterized by comprising: And selecting the working mode of the hybrid vehicle thermal management system according to the received second working mode selection information by using the controller, and controlling an inter-cooling loop, a motor cooling loop, an engine cooling loop, a first conversion loop and a second conversion loop of the hybrid vehicle thermal management system to execute the function of the selected working mode.
8. 8. A control method based on the hybrid vehicle thermal management system according to claim 5, characterized by comprising: And selecting the working mode of the hybrid electric vehicle thermal management system according to the received third working mode selection information by using the controller, and controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump and the sixth water pump of the hybrid electric vehicle thermal management system to execute the function of the selected working mode.
9. 9. The method for controlling a hybrid vehicle thermal management system as set forth in claim 8, wherein the operating modes of the hybrid vehicle thermal management system include an intercooler-enhanced cooling mode, an engine-enhanced cooling mode, an intercooler and engine-enhanced cooling mode, a first motor-enhanced cooling mode, a second motor-enhanced cooling mode, a third motor-enhanced cooling mode, and an intercooler heating mode.
10. 10. The method for controlling a hybrid vehicle thermal management system according to claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to perform the intercooler enhanced cooling mode comprises: The controller controls the first interface and the second interface of the first valve to be opened, the ninth interface to be closed, the third interface and the fourth interface of the second valve to be opened, the tenth interface to be closed, the fifth interface, the sixth interface and the eleventh interface of the third valve to be closed, the seventh interface, the eighth interface and the twelfth interface of the fourth valve to be closed, and the first water pump, the third water pump and the fourth water pump to be opened, and the second water pump, the fifth water pump and the sixth water pump to be closed.
11. 11. The method for controlling the hybrid vehicle thermal management system according to claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to execute the engine-intensive cooling mode comprises: The controller controls the first interface, the second interface and the ninth interface of the first valve to be closed, controls the third interface, the fourth interface and the tenth interface of the second valve to be closed, controls the fifth interface and the sixth interface of the third valve to be opened, controls the seventh interface and the eighth interface of the fourth valve to be opened, controls the twelfth interface to be closed, and controls the first water pump, the fourth water pump and the fifth water pump to be opened, and controls the second water pump, the third water pump and the sixth water pump to be closed.
12. 12. The method for controlling a hybrid vehicle thermal management system as defined in claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to perform the intercooler and engine intensive cooling mode comprises: The controller controls the first interface and the second interface of the first valve to be opened, the ninth interface to be closed, the third interface and the fourth interface of the second valve to be opened, the tenth interface to be closed, the fifth interface and the sixth interface of the third valve to be opened, the eleventh interface to be closed, the seventh interface and the eighth interface of the fourth valve to be opened, the twelfth interface to be closed, and the first water pump, the third water pump, the fourth water pump and the fifth water pump to be opened, and the second water pump and the sixth water pump to be closed.
13. 13. The method for controlling the hybrid vehicle thermal management system according to claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to execute the first motor-intensive cooling mode comprises: The controller controls the first interface and the second interface of the first valve to be opened, the ninth interface to be closed, the third interface and the fourth interface of the second valve to be opened, the tenth interface to be closed, the fifth interface, the sixth interface and the eleventh interface of the third valve to be closed, the seventh interface, the eighth interface and the twelfth interface of the fourth valve to be closed, the second water pump and the third water pump to be opened, and the first water pump, the fourth water pump, the fifth water pump and the sixth water pump to be closed.
14. 14. The method for controlling the hybrid vehicle thermal management system according to claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to execute the second motor-intensive cooling mode comprises: The controller controls the first interface, the second interface and the ninth interface of the first valve to be closed, controls the third interface, the fourth interface and the tenth interface of the second valve to be closed, controls the fifth interface and the sixth interface of the third valve to be opened, controls the seventh interface and the eighth interface of the fourth valve to be opened, controls the twelfth interface to be closed, and controls the second water pump and the fifth water pump to be opened, wherein the first water pump, the third water pump, the fourth water pump and the sixth water pump are closed.
15. 15. The method for controlling the thermal management system of the hybrid vehicle as claimed in claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to perform the third motor-intensive cooling mode by the controller comprises: The controller controls the first interface and the second interface of the first valve to be opened, the ninth interface to be closed, the third interface and the fourth interface of the second valve to be opened, the tenth interface to be closed, the fifth interface and the sixth interface of the third valve to be opened, the eleventh interface to be closed, the seventh interface and the eighth interface of the fourth valve to be opened, the twelfth interface to be closed, and the second water pump, the third water pump and the fifth water pump to be opened, and the first water pump, the fourth water pump and the sixth water pump to be closed.
16. 16. The method for controlling a hybrid vehicle thermal management system according to claim 9, wherein the method for controlling the first valve, the second valve, the third valve, the fourth valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the fifth water pump, and the sixth water pump to perform an intercooler heating mode comprises: The controller controls the first interface and the ninth interface of the first valve to be opened, the second interface to be closed, the third interface and the tenth interface of the second valve to be opened, the fourth interface to be closed, the fifth interface and the eleventh interface of the third valve to be opened, the sixth interface to be closed, the seventh interface and the twelfth interface of the fourth valve to be opened, the eighth interface to be closed, and the first water pump, the fourth water pump and the sixth water pump to be opened, and the second water pump, the third water pump and the fifth water pump to be closed.

Description

Hybrid electric vehicle thermal management system and control method Technical Field The invention belongs to the technical field of automobile thermal management, and particularly relates to a hybrid electric vehicle thermal management system and a control method. Background The intercooling system of the hybrid vehicle is basically consistent with that of a traditional fuel oil vehicle in core function and working principle, and is mainly used for a hybrid vehicle type carrying a turbocharged engine. The method aims at solving the problem of air inlet temperature rise caused by turbocharging, thereby improving the overall efficiency and reliability of the system. The prior art has the problems that the air cooling radiator of the prior art is smaller in layout space and limited in radiating area, and the radiating performance of the inter-cooling system is insufficient, and under the conditions of high-load, high-temperature environment or low-speed running of an engine, the radiating efficiency of the inter-cooling system is always insufficient to keep up with the heat generating efficiency of the pressurized air, so that the temperature of the air after supercharging is easily higher than that of the engine, and the performance and the emission of the engine are influenced. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a hybrid electric vehicle thermal management system and a control method to solve the technical problem of insufficient heat dissipation performance of an existing intercooling system of a hybrid electric vehicle. In order to achieve the above purpose, the technical scheme of the invention is as follows: A hybrid vehicle thermal management system includes a controller, an intercooler circuit, a motor cooling circuit, and a first conversion circuit connected between the intercooler circuit and the motor cooling circuit; The controller is used for controlling the start and stop of the intercooling loop and the motor cooling loop; The controller is further used for controlling the first conversion circuit to be communicated with the intercooling circuit and the motor cooling circuit, so that cooling liquid in the intercooling circuit and cooling liquid in the motor cooling circuit can be mutually exchanged, or controlling the first conversion circuit to be disconnected from the intercooling circuit and the motor cooling circuit, so that the intercooling circuit and the motor cooling circuit can independently operate. Through set up between the intercooling return circuit with the motor cooling return circuit first conversion return circuit makes coolant liquid in the intercooling return circuit with coolant liquid in the motor cooling return circuit can exchange each other, can be under the hybrid vehicle is in engine drive operating mode, and when the cooling efficiency of intercooling return circuit is not enough, utilize idle the motor cooling return circuit is right coolant liquid in the intercooling return circuit is cooled, promotes the cooling efficiency of intercooling return circuit, can effectively solve the problem that the cooling performance that the intercooling system of current hybrid vehicle exists is not enough. Further, the intercooling loop comprises an air-cooled radiator, a first cooling liquid pipe connected between a liquid inlet and a liquid outlet of the air-cooled radiator, and an intercooler and a first water pump which are arranged on the first cooling liquid pipe; the motor cooling loop comprises a low-temperature radiator, a second cooling liquid pipe connected between a liquid inlet and a liquid outlet of the low-temperature radiator, and a motor and a second water pump which are arranged on the second cooling liquid pipe; The first conversion loop comprises a first communication pipeline connected between a liquid inlet of the air-cooled radiator and a liquid inlet of the low-temperature radiator, a second communication pipeline connected between a liquid outlet of the air-cooled radiator and a liquid outlet of the low-temperature radiator, a first valve installed on the first communication pipeline, a second valve installed on the second communication pipeline, and a third water pump installed on the first communication pipeline or the second communication pipeline; the controller is used for controlling the opening and closing of the first valve and the second valve, and the starting and stopping of the first water pump, the second water pump and the third water pump. And by opening the first valve, the second valve, the first water pump and the third water pump and closing the second water pump, cooling liquid flows into the low-temperature radiator from the intercooling loop and flows back into the intercooling loop, so that the heat dissipation efficiency of the intercooling loop can be improved by using the low-temperature radiator. The first valve, the second water pump and the third water pump are opene