An electric vehicle wheel hub motor heat dissipation management system

Abstract

The application discloses a kind of electric vehicle wheel hub motor heat dissipation management systems, system includes front wheel heat dissipation circulation loop, rear wheel heat dissipation circulation loop and controller;Its front wheel heat dissipation circulation loop includes three different heat dissipation cycles, rear wheel heat dissipation circulation loop includes three different rear wheel heat dissipation cycles;Controller is judged heat dissipation demand by the motor temperature signal obtained, selects operating mode and then generates control signal output to solenoid valve, heat dissipation fan and water pump, by controlling solenoid valve on-off selects corresponding heat dissipation cycle, by controlling water pump speed and heat dissipation fan adjusts heat dissipation amount to reach the heat dissipation management effect of four-wheel wheel hub motor, and it is of great significance to improve the heat dissipation management efficiency of four-wheel wheel hub motor.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle thermal management technology, and more specifically to a heat dissipation management system for electric vehicle wheel hub motors. Background Technology

[0002] With the popularization of distributed drive electric vehicles, especially the development of in-wheel motor electric vehicles, electric vehicles are becoming more intelligent and modular. This brings with it the problem of motor heat dissipation. Because the motor directly drives the wheels, there will be a high current input to the motor under load, which will generate a lot of heat. If the heat is not dissipated in time, it will cause irreversible damage to the motor, or even burn it out.

[0003] Patent CN111409446B discloses a heat dissipation system and control method for electric vehicle hub motors. The system uses two circulating pumps to deliver cooling water from the cooling water tank to the front and rear drive hub motors. The system then controls the on / off of the front and rear drive hub motors through pipeline valves to achieve four-cycle heat dissipation. However, the system uses air valves to achieve heat exchange between the cooling water and the air, which results in high cost, low heat dissipation efficiency, and is not suitable for heat dissipation of hub motors under heavy load conditions.

[0004] Patent CN110224553B discloses an integrated cooling system for four-wheel hub motor drives. This system uses a water pump to deliver cooling water through four cooling water jackets to the four hub motors, and a solenoid valve to cyclically switch between the cooling circuits for the first and second hub motors and the cooling circuits for the third and fourth hub motors. However, the cooling cycle for the front and rear hub motors is relatively simple, with only a single cooling cycle for the front wheels, making it unsuitable for various operating conditions. Furthermore, the system's cooling capacity and efficiency are low, failing to meet the cooling requirements of motors operating at high power for extended periods.

[0005] Existing motor cooling management systems typically cool the front or rear wheels as a whole, and cannot independently cool each hub motor, which makes it difficult to control the cooling of each motor individually. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this invention provides a heat dissipation management system for electric vehicle hub motors, facilitating independent distributed heat dissipation management of hub motors and improving heat dissipation efficiency. It integrates temperature signal acquisition, real-time data analysis, and precise heat dissipation control into a single device. This device judges the ambient temperature of the electric vehicle and determines the optimal heat dissipation cycle based on the current motor temperature. The optimal heat dissipation cycle for both front-drive and rear-drive hub motors is achieved by controlling the on / off state of solenoid valves, water pump speed, and the switching on / off state of the cooling fan. Summary of the Invention

[0008] To achieve its objectives, the present invention employs the following technical solution:

[0009] The electric vehicle hub motor heat dissipation management system of the present invention is characterized in that: the heat dissipation management system includes a front wheel heat dissipation circulation loop, a rear wheel heat dissipation circulation loop, and a controller; the front wheel heat dissipation circulation loop includes a first front wheel heat dissipation circulation loop, a second front wheel heat dissipation circulation loop, and a third front wheel heat dissipation circulation loop; the rear wheel heat dissipation circulation loop includes a first rear wheel heat dissipation circulation loop, a second rear wheel heat dissipation circulation loop, and a third rear wheel heat dissipation circulation loop.

[0010] The first cooling cycle of the front wheel is as follows: the cooling water in the water tank flows into the first electronically controlled thermostat through the left front wheel hub motor, the left front wheel temperature sensor, the right front wheel hub motor and the right front wheel temperature sensor in sequence under the pressure of the water pump, and then flows back to the water tank through the first solenoid valve.

[0011] The second cooling cycle of the front wheel is as follows: the cooling water in the water tank flows into the first electronically controlled thermostat under the pressure of the water pump through the left front wheel hub motor, the left front wheel temperature sensor, the right front wheel hub motor and the right front wheel temperature sensor in sequence, and then through the third solenoid valve through the second radiator and the second radiator temperature sensor in sequence, and finally flows back to the water tank through the one-way valve.

[0012] The third cooling cycle for the front wheels is as follows: Cooling water in the water tank, under the pressure of the water pump, flows sequentially through the left front wheel hub motor, the left front wheel temperature sensor, the right front wheel hub motor, and the right front wheel temperature sensor into the first electronically controlled thermostat. Then, it is divided into two paths by the third solenoid valve. One path directly enters the second radiator, and then flows back to the water tank through the second radiator temperature sensor and the one-way valve to achieve the cooling cycle. The other path enters the first radiator through the fifth solenoid valve, and then flows back to the water tank sequentially through the first radiator temperature sensor and the one-way valve.

[0013] The first cooling cycle of the rear wheel is as follows: the cooling water in the water tank flows into the second electronically controlled thermostat through the left rear wheel hub motor, the left rear wheel temperature sensor, the right rear wheel hub motor and the right rear wheel temperature sensor in sequence under the pressure of the water pump, and then flows back to the water tank through the second solenoid valve.

[0014] The second cooling cycle of the rear wheel is as follows: the cooling water in the water tank flows into the second electronically controlled thermostat in sequence through the left rear wheel hub motor, the left rear wheel temperature sensor, the right rear wheel hub motor and the right rear wheel temperature sensor under the pressure of the water pump, and then through the first radiator and the first radiator temperature sensor in sequence through the fourth solenoid valve, and finally flows back to the water tank through the one-way valve.

[0015] The third cooling cycle of the rear wheels is as follows: Cooling water in the water tank, under the pressure of the water pump, flows sequentially through the left rear wheel hub motor, the left rear wheel temperature sensor, the right rear wheel hub motor, and the right rear wheel temperature sensor into the second electronically controlled thermostat. Then, it is divided into two paths by the fourth solenoid valve. One path goes directly into the first radiator and then flows back to the water tank through the first radiator temperature sensor; the other path goes into the second radiator through the fifth solenoid valve and then flows back to the water tank sequentially through the second radiator temperature sensor and the one-way valve.

[0016] The controller is used to control the opening and closing of the first, second, third, fourth, and fifth solenoid valves according to different heat dissipation requirements, so as to switch between different cooling modes for the front and rear wheels.

[0017] The electric vehicle hub motor heat dissipation management system of the present invention is also characterized by: using four temperature sensors to detect and obtain temperature information, including: using the left front wheel temperature sensor to detect and obtain the temperature of the left front wheel hub motor heat dissipation circuit, using the right front wheel temperature sensor to detect and obtain the temperature of the right front wheel hub motor heat dissipation circuit, using the left rear wheel temperature sensor to detect and obtain the temperature of the left rear wheel hub motor heat dissipation circuit, and using the right rear wheel temperature sensor to detect and obtain the temperature of the right rear wheel hub motor heat dissipation circuit.

[0018] The controller switches the cyclic cooling mode according to the temperature information detected by the four temperature sensors in the following manner:

[0019] Mode 1: Open the first and second solenoid valves, and close the third, fourth and fifth solenoid valves to achieve the first cycle of heat dissipation for the front wheels and the first cycle of heat dissipation for the rear wheels.

[0020] Mode 2: Open the third and fourth solenoid valves, and close the first, second, and fifth solenoid valves to achieve the second cycle of heat dissipation for the front wheels and the second cycle of heat dissipation for the rear wheels;

[0021] Mode 3: Open the third, fourth, and fifth solenoid valves, and close the first and second solenoid valves to achieve the third cycle of heat dissipation for the front wheels and the third cycle of heat dissipation for the rear wheels.

[0022] The electric vehicle wheel hub motor heat dissipation management system of the present invention is also characterized by: configuring a first cooling fan and a second cooling fan for a one-to-one correspondence between the first radiator and the second radiator; and connecting an expansion tank between the first radiator and the second radiator.

[0023] The electric vehicle hub motor heat dissipation management system of the present invention is also characterized by: an overflow valve is provided at the outlet of the water pump as a circuit overload protection.

[0024] The electric vehicle wheel hub motor heat dissipation management system of the present invention is also characterized in that: the first electronically controlled thermostat and the second electronically controlled thermostat adjust the amount of water entering the first radiator and the second radiator according to the temperature of the cooling water.

[0025] 1. The electric vehicle hub motor heat dissipation management system of the present invention can realize different cooling cycles for the front and rear wheels by controlling the on / off state of each solenoid valve, which can meet the heat dissipation requirements of electric vehicles under various operating conditions. Furthermore, each cooling cycle mode is independent of the others and does not interfere with each other, greatly improving the operational stability of the heat dissipation system.

[0026] 2. The electric vehicle wheel hub motor heat dissipation management system of the present invention analyzes the motor and external environment temperature information collected by sensors, determines the heat dissipation requirements, selects the most suitable heat dissipation cycle mode, and sends the control signal to the execution unit to realize intelligent heat dissipation of electric vehicle wheel hub motor.

[0027] 3. The electric vehicle wheel hub motor heat dissipation management system of the present invention is equipped with temperature sensors at each circuit node, which can monitor the safe operation and detect faults of the entire heat dissipation circuit in real time, greatly facilitating later maintenance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the electric vehicle wheel hub motor heat dissipation management system of the present invention;

[0029] Figure 2 This is a flowchart of the electric vehicle wheel hub motor heat dissipation management system of the present invention;

[0030] Numbered in the diagram: 1 Water tank; 2 Water pump; 3 Overflow valve; 4 Left front wheel hub motor; 5 Right front wheel hub motor; 6 Left rear wheel hub motor; 7 Right rear wheel hub motor; 8 Left front wheel temperature sensor; 9 Right front wheel temperature sensor; 10 Left rear wheel temperature sensor; 11 Right rear wheel temperature sensor; 12 First electronic thermostat; 13 Second electronic thermostat; 14 First solenoid valve; 15 Second solenoid valve; 16 Third solenoid valve; 17 Fourth solenoid valve; 18 Fifth solenoid valve; 19 First radiator; 20 Second radiator; 21 First radiator temperature sensor; 22 Second radiator temperature sensor; 23 Expansion tank; 24 First cooling fan; 25 Second cooling fan; 26 Controller; 27 Check valve. Detailed Implementation

[0031] This invention relates to a heat dissipation management system for an electric vehicle wheel hub motor, which mainly consists of a water pump, a wheel hub motor, an electronically controlled thermostat, a solenoid valve, a radiator, an expansion tank, an overflow valve, a check valve, a temperature sensor, and a controller. To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings.

[0032] See Figure 1 With the first solenoid valve 14 open and the third solenoid valve 16 closed, cooling water is pumped from the water tank 1 to the left front wheel hub motor 4 via the water pump 2. After heat exchange, it flows out through the left front wheel temperature sensor 8, transmitting a temperature signal to the controller 26. Then, the cooling water enters the right front wheel hub motor 5 to dissipate heat and flows out through the right front wheel temperature sensor 9, which transmits a temperature signal to the controller 26. The cooling water then flows along the cooling pipe into the first electronically controlled thermostat 12 and finally returns to the water pump 2, forming the first cooling cycle for the front wheels. Similarly, with the second solenoid valve 15 open and the fourth solenoid valve 17 closed, the water pump 2 inputs cooling water from the left rear wheel hub motor 6, outputs through the left rear wheel temperature sensor 10, enters the right rear wheel hub motor 7, passes through the right rear wheel temperature sensor 11, enters the second electronically controlled thermostat 13, and finally flows back to the water pump 2 through the second solenoid valve 15, forming the first cooling cycle for the rear wheels. The entire first cooling cycle of the front and rear wheels is analyzed by the controller 26, which analyzes the temperature difference between the left front wheel temperature sensor 8 and the right front wheel temperature sensor 9, and the left rear wheel temperature sensor 10 and the right rear wheel temperature sensor 11 to calculate the heat generation and heat dissipation of the hub motor. The controller 26 controls the speed of the water pump 2, the first electronic thermostat 12, and the second electronic thermostat 13 to control the cooling cycle flow and adjust the heat dissipation.

[0033] Furthermore, with the first solenoid valve 14 closed, the fifth solenoid valve 18 closed, and the third solenoid valve 16 open, cooling water is pumped from the water tank 1 into the left front wheel hub motor 4 via the water pump 2. After passing through the left front wheel temperature sensor 8, it flows out into the right front wheel hub motor 5, then through the right front wheel temperature sensor 9 into the first electronically controlled thermostat 12. Next, it enters the second radiator 20 through the third solenoid valve 16. In addition to its own structure for heat dissipation, the radiator is also equipped with a second cooling fan 25 for heat dissipation. After most of the heat exchange occurs here, the cooling water passes through the second radiator temperature sensor 22 at the outlet and the one-way valve 27 to prevent backflow of liquid into the main circuit of the water pump, and finally flows back to the water pump 2 to form the second cooling cycle of the front wheels. Similarly, with the first solenoid valve 14, the second solenoid valve 15, the third solenoid valve 16, and the fifth solenoid valve 18 closed, and the fourth solenoid valve 17 open, cooling water flows from the left rear wheel hub motor 6 under the action of the water pump 2, flows out through the left rear wheel temperature sensor 10, enters the right rear wheel hub motor 7, passes through the right rear wheel temperature sensor 11, enters the second electronically controlled thermostat 13, then flows along the cooling pipe through the fourth solenoid valve 17 into the first radiator 19 for heat exchange, and then flows back to the water pump 2 through the first radiator temperature sensor 21 and the one-way valve 27 to form the second cooling cycle of the rear wheels. All radiators participating in the second cooling cycle of the front and rear wheels are connected to expansion tanks 23 to absorb the cooling water overflowing due to thermal expansion, preventing the water pipes in the radiators from overheating and bursting due to high pressure caused by thermal expansion. The controller 26 receives four motor temperature sensors and two radiator temperature sensors, analyzes the heat dissipation requirements, and controls the first electronic thermostat 12, the second electronic thermostat 13, the first cooling fan 24, the second cooling fan 25 and the water pump 2 to achieve precise control of heat dissipation and effectively improve the heat dissipation efficiency of the entire front and rear wheel second heat dissipation cycle.

[0034] Finally, when the first solenoid valve 14, the second solenoid valve 15, and the fourth solenoid valve 17 are closed, and the third solenoid valve 16 and the fifth solenoid valve 18 are open, the cooling water flows from the water tank 1 into the left front wheel hub motor 4 through the water pump 2, flows out through the left front wheel temperature sensor 8 into the right front wheel hub motor 5, flows out through the right front wheel temperature sensor 9 into the first electronically controlled thermostat 12, then part of the cooling water enters the second radiator 20 through the third solenoid valve 16, and the other part of the cooling water enters the first radiator 19 through the fifth solenoid valve 18, and then flows through the second radiator temperature sensor 22 and the first radiator temperature sensor 21 respectively to merge and flow back to the water pump 2 through the one-way valve 27 to form the third cooling cycle of the front wheels. Similarly, when the first solenoid valve 14, the second solenoid valve 15, and the third solenoid valve 16 are closed, and the fourth solenoid valve 17 and the fifth solenoid valve 18 are open, the water pump 2 inputs cooling water from the left rear wheel hub motor 6, outputs through the left rear wheel temperature sensor 10, enters the right rear wheel hub motor 7, passes through the right rear wheel temperature sensor 11, and enters the second electronically controlled thermostat 13. Then, a portion of the cooling water enters the first radiator 19 through the fourth solenoid valve 17, and the remaining cooling water enters the second radiator 20 through the fifth solenoid valve 18. It then flows out from the first radiator temperature sensor 21 and the second radiator temperature sensor 22 respectively, and flows back to the water pump 2 through the one-way valve 27, forming the third rear wheel cooling cycle. Because both radiators work simultaneously, the cooling capacity and efficiency of the third cooling cycle are the highest. All heat dissipation cycles are overload protected by overflow valve 3. All temperature signal inputs of all heat dissipation cycles are collected and analyzed by controller 26. Controller 26 controls the heat dissipation of the circulation system by controlling water pump 2, two cooling fans and two thermostats. At the same time, the controller can select different heat dissipation modes for different working conditions and environments.

[0035] The working principle of the electric vehicle hub motor heat dissipation management system of the present invention is described as follows:

[0036] 1. Vehicle running at low speed

[0037] When the electric vehicle is running at low speed, the motor generates less heat and has less demand for heat dissipation. The controller 26 selects the heat dissipation mode of the first heat dissipation cycle of the front and rear wheels based on the temperature signal collected by the temperature sensor. In this mode, the first electronically controlled thermostat 12, the second electronically controlled thermostat 13 and the water pump 2 play the role of heat dissipation regulation.

[0038] 2. Vehicles operating at medium speed

[0039] When the electric vehicle is running at medium speed, the motor generates a lot of heat and has a large demand for heat dissipation. The controller 26 analyzes the feedback temperature signal and controls the solenoid valve to realize the heat dissipation mode of the second heat dissipation cycle of the front and rear wheels. In this mode, the temperature control is mainly achieved by the first radiator 19, the second radiator 20, the first electronic thermostat 12, the second electronic thermostat 13 and the water pump 2.

[0040] 3. Vehicles operating at high speeds or climbing hills under load

[0041] When an electric vehicle is running at high speed or climbing a hill under heavy load, the power consumption is high and the current flowing through the motor is at its maximum, resulting in a large amount of heat generation and the greatest demand for heat dissipation. At this time, the controller 26 can switch to a third cooling cycle for the front and rear wheels. In this cycle, the first radiator 19, the second radiator 20, the first cooling fan 24, and the second cooling fan 25 all participate in heat dissipation. Simultaneously, the controller increases the speed of the water pump 2 and opens the three valves of the first electronic thermostat 12 and the second electronic thermostat 13 to their maximum. At this time, the cooling system is operating at full power, with the strongest heat dissipation capacity, which can effectively dissipate the heat generated by the motor and control the motor temperature within a reasonable range.

[0042] See Figure 2 This diagram is a flowchart of the electric vehicle wheel hub motor cooling management system, which includes three parts: detection unit, control unit, and execution unit. The detection unit consists of four wheel hub motor temperature sensors: left front wheel temperature sensor 8, right front wheel temperature sensor 9, left rear wheel temperature sensor 10, and right rear wheel temperature sensor 11; two radiator temperature sensors: first radiator temperature sensor 21 and second radiator temperature sensor 22; and an external ambient temperature sensor. Its main function is to input the motor cooling water temperature, radiator outlet temperature, and external ambient temperature signals to the control unit. The control unit is an independent controller 26. It judges the heat dissipation requirements of each motor by detecting the temperature signal input from the detection unit, selects the optimal working mode, and then calculates the control level to generate control signals to the actuators, including five solenoid valves: first solenoid valve 14, second solenoid valve 15, third solenoid valve 16, fourth solenoid valve 17, and fifth solenoid valve 18, two cooling fans: first cooling fan 24 and second cooling fan 25, two electronically controlled thermostats: first electronically controlled thermostat 12 and second electronically controlled thermostat 13, and water pump 2, to realize the execution and switching of the heat dissipation cycle.

[0043] This invention enables electric vehicles to dissipate heat under various operating conditions, meeting the heat dissipation requirements of low-speed, medium-speed, high-speed, and hill-climbing usage scenarios. At the same time, it combines a controller to analyze data and control the actuators to achieve intelligent heat dissipation of the electric vehicle's wheel hub motor.

[0044] The structural features of the present invention have been described in detail above with reference to the illustrations. The present invention is not limited to the scope of implementation shown in the illustrations. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, shall be within the protection scope of the present invention as long as they do not exceed the spirit covered by the specification and illustrations.

Claims

1. A heat dissipation management system for an electric vehicle wheel hub motor, characterized in that: The heat dissipation management system includes a front wheel heat dissipation circulation loop, a rear wheel heat dissipation circulation loop, and a controller; the front wheel heat dissipation circulation loop includes a first front wheel heat dissipation circulation loop, a second front wheel heat dissipation circulation loop, and a third front wheel heat dissipation circulation loop; the rear wheel heat dissipation circulation loop includes a first rear wheel heat dissipation circulation loop, a second rear wheel heat dissipation circulation loop, and a third rear wheel heat dissipation circulation loop. The first cooling cycle of the front wheel is as follows: the cooling water in the water tank (1) flows into the first electronically controlled thermostat (12) through the left front wheel hub motor (4), the left front wheel temperature sensor (8), the right front wheel hub motor (5) and the right front wheel temperature sensor (9) under the pressure of the water pump (2), and then flows back to the water tank (1) through the first solenoid valve (14). The second cooling cycle of the front wheel is as follows: the cooling water in the water tank (1) flows into the first electronically controlled thermostat (12) through the left front wheel hub motor (4), the left front wheel temperature sensor (8), the right front wheel hub motor (5) and the right front wheel temperature sensor (9) under the pressure of the water pump (2), and then through the third solenoid valve (16) through the second radiator (20) and the second radiator temperature sensor (22), and finally flows back to the water tank (1) through the one-way valve (27); The third cooling cycle of the front wheel is as follows: the cooling water in the water tank (1) flows into the first electronically controlled thermostat (12) through the left front wheel hub motor (4), the left front wheel temperature sensor (8), the right front wheel hub motor (5), and the right front wheel temperature sensor (9) under the pressure of the water pump (2). Then, it is divided into two paths through the third solenoid valve (16). One path directly enters the second radiator (20) and then flows back to the water tank (1) through the second radiator temperature sensor (22) and the one-way valve (27) to achieve the cooling cycle. The other path enters the first radiator (19) through the fifth solenoid valve (18) and then flows back to the water tank (1) through the first radiator temperature sensor (21) and the one-way valve (27). The first cooling cycle of the rear wheel is as follows: the cooling water in the water tank (1) flows into the second electronically controlled thermostat (13) through the left rear wheel hub motor (6), the left rear wheel temperature sensor (10), the right rear wheel hub motor (7) and the right rear wheel temperature sensor (11) under the pressure of the water pump (2), and then flows back to the water tank (1) through the second solenoid valve (15). The second cooling cycle of the rear wheel is as follows: the cooling water in the water tank (1) flows into the second electronically controlled thermostat (13) in sequence through the left rear wheel hub motor (6), the left rear wheel temperature sensor (10), the right rear wheel hub motor (7) and the right rear wheel temperature sensor (11) under the pressure of the water pump (2), and then through the first radiator (19) and the first radiator temperature sensor (21) in sequence through the fourth solenoid valve (17), and finally flows back to the water tank (1) through the one-way valve (27). The third cooling cycle of the rear wheel is as follows: the cooling water in the water tank (1) flows into the second electronically controlled thermostat (13) through the left rear wheel hub motor (6), the left rear wheel temperature sensor (10), the right rear wheel hub motor (7) and the right rear wheel temperature sensor (11) under the pressure of the water pump (2), and then through the fourth solenoid valve (17) into two paths. One path goes directly into the first radiator (19) and then flows back to the water tank (1) through the first radiator temperature sensor (21); the other path goes into the second radiator (20) through the fifth solenoid valve (18) and then flows back to the water tank (1) through the second radiator temperature sensor (22) and the one-way valve (27). The controller (26) is used to control the opening and closing of the first solenoid valve (14), the second solenoid valve (15), the third solenoid valve (16), the fourth solenoid valve (17) and the fifth solenoid valve (18) according to different heat dissipation requirements, so as to realize the switching of different cooling modes of the front wheel and the rear wheel.

2. The electric vehicle wheel hub motor heat dissipation management system according to claim 1, characterized in that: Temperature information is obtained by using four temperature sensors, including: using the left front wheel temperature sensor (8) to obtain the temperature of the left front wheel hub motor cooling circuit, using the right front wheel temperature sensor (9) to obtain the temperature of the right front wheel hub motor cooling circuit, using the left rear wheel temperature sensor (10) to obtain the temperature of the left rear wheel hub motor cooling circuit, and using the right rear wheel temperature sensor (11) to obtain the temperature of the right rear wheel hub motor cooling circuit. The controller (26) switches the cyclic heat dissipation mode according to the temperature information detected by the four temperature sensors in the following manner: Mode 1: Open the first solenoid valve (14) and the second solenoid valve (15), and close the third solenoid valve (16), the fourth solenoid valve (17) and the fifth solenoid valve (18) to achieve the first cycle of heat dissipation for the front wheel and the first cycle of heat dissipation for the rear wheel; Mode 2: Open the third solenoid valve (16) and the fourth solenoid valve (17), and close the first solenoid valve (14), the second solenoid valve (15) and the fifth solenoid valve (18) to achieve the second cycle of heat dissipation for the front wheel and the second cycle of heat dissipation for the rear wheel; Mode 3: Open the third solenoid valve (16), the fourth solenoid valve (17) and the fifth solenoid valve (18), and close the first solenoid valve (14) and the second solenoid valve (15) to achieve the third cycle of heat dissipation for the front wheels and the third cycle of heat dissipation for the rear wheels.

3. The electric vehicle hub motor heat dissipation management system according to claim 1, characterized in that: A first cooling fan (24) and a second cooling fan (25) are configured one-to-one with the first radiator (19) and the second radiator (20); an expansion tank (23) is connected between the first radiator (19) and the second radiator (20).

4. The electric vehicle wheel hub motor heat dissipation management system according to claim 1, characterized in that: An overflow valve (3) is installed at the outlet of the water pump (2) as a circuit overload protection.

5. The electric vehicle wheel hub motor heat dissipation management system according to claim 1, characterized in that: The first electronic thermostat (12) and the second electronic thermostat (13) adjust the amount of water entering the first radiator (19) and the second radiator (20) according to the temperature of the cooling water.

Images