Thermal management system testboard applied to teaching and training

Abstract

The invention discloses a thermal management system testboard applied to teaching training, which comprises a thermal management integrated unit and a simulation control unit, and is characterized in that the thermal management integrated unit comprises a thermal management controller, a water pump set, a motor radiator, a fan, a battery heat exchanger, a compressor set and a cooling liquid heating PTC (Positive Temperature Coefficient); the water pump set comprises a battery water pump and a motor water pump. The simulation control unit comprises an upper computer, a battery simulation water tank, a motor simulation water tank and a simulation heater group; the motor simulation water tank, the motor water pump and the motor radiator are connected through pipelines to form a motor heat management loop. The battery simulation water tank, the battery water pump, the battery heat exchanger and the cooling liquid heating PTC are connected through a pipeline to form a battery heat management loop; the battery heat exchanger and the compressor unit are connected through a pipeline to form a refrigerant loop; the heat management controller is connected with and controls the motor water pump, the fan, the battery water pump, the cooling liquid heating PTC and the compressor; and the upper computer is connected with the thermal management controller.

Description

Technical Field

[0001] The invention relates to the field of thermal management system testing, and in particular to a thermal management system testing platform used for teaching and training. Background Art

[0002] The new energy vehicle industry is developing rapidly: Against the backdrop of global energy transformation and increasingly stringent environmental protection requirements, the new energy vehicle industry is developing rapidly. With the rapid development and popularization of new energy vehicles, the importance of thermal management systems has become more prominent: batteries, motors, electronic equipment, etc. in new energy vehicles are extremely sensitive to temperature. The thermal management system is also closely related to the vehicle's range, safety, and comfort, which makes the thermal management system one of the key technologies for new energy vehicles.

[0003] The complexity and importance of thermal management technology for new energy vehicles make the training of relevant professionals extremely important. The demand for teaching and testing benches for thermal management of new energy vehicles is increasing in colleges and universities, vocational schools, and corporate training departments, in order to provide a practical teaching and R&D platform and cultivate the practical operation and innovation capabilities of students and technicians.

[0004] The current thermal management teaching test bench faces the following difficulties:

[0005] 1) Difficulty in high-precision simulation: To accurately simulate the operating status of the thermal management system of new energy vehicles under various working conditions, high-precision sensors and simulation equipment are required. However, at present, some test benches cannot meet the accuracy requirements when simulating the heating characteristics of components such as batteries and motors and complex environmental temperature changes, which affects the accuracy of the test results.

[0006] 2) Limited simulation of thermal management conditions: New energy vehicles will encounter a variety of conditions during actual driving, such as high-speed driving, climbing, sudden acceleration, sudden deceleration, etc. Most of the existing teaching test benches can only simulate a single or a few conditions, making it difficult to comprehensively evaluate the performance of the thermal management system under complex conditions.

[0007] 3) High equipment purchase cost: A complete set of new energy vehicle thermal management teaching test bench includes multiple parts such as environmental simulation cabin, power system operating condition simulation, thermal management system components, etc. The purchase cost is high, which puts great financial pressure on some teaching institutions and small R&D companies.

[0008] 4) Insufficient teaching resources: Currently, there is a relative lack of supporting teaching materials, teaching cases and teaching methods for new energy vehicle thermal management teaching test benches. Teachers often need to explore on their own during the teaching process, which affects the teaching effect. The design and function of some teaching test benches are somewhat different from the actual needs of new energy vehicle manufacturers. The knowledge and skills that students learn in school cannot be well connected with the actual work requirements of enterprises.

[0009] Therefore, it is necessary to provide a thermal management system test bench for teaching and training, which can simulate the actual vehicle thermal management working conditions with high precision and multiple working conditions, practice the functions and applications of the thermal management system of pure electric vehicles, and help improve the users' practical and innovative abilities. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a thermal management system test bench for teaching and training, which can realize high-precision and multi-condition simulation of actual vehicle thermal management working conditions and practice the functions and applications of pure electric vehicle thermal management systems.

[0011] The technical solution adopted by the present invention to solve the above technical problems is to provide a thermal management system test bench for teaching and training, including a thermal management integrated unit and a simulation control unit, the thermal management integrated unit includes a thermal management controller, a water pump unit, a motor radiator, a fan, a battery heat exchanger, a compressor unit and a coolant heating PTC; the water pump unit includes a battery water pump and a motor water pump; the compressor unit includes a compressor and a condenser; the simulation control unit includes a host computer, a communication box, a battery simulation water tank, a motor simulation water tank and a simulation heater group, and the simulation heater group includes a battery simulation heater and a motor simulation heater;

[0012] The battery simulation heater is connected to the battery simulation water tank and controls the heating mode to simulate the thermal capacity state of the battery; the motor simulation heater is connected to the motor simulation water tank and controls the heating mode to simulate the thermal capacity state of the motor;

[0013] The motor simulation water tank, the motor water pump and the motor radiator are connected through pipelines to form a motor thermal management loop; the battery simulation water tank, the battery water pump, the battery heat exchanger and the coolant heating PTC are connected through pipelines to form a battery thermal management loop; the battery heat exchanger, the compressor and the condenser are connected through pipelines to form a refrigerant loop;

[0014] The thermal management controller is connected to and controls the motor water pump and the fan to adjust the temperature of the motor simulation water tank; the thermal management controller is connected to and controls the battery water pump, the coolant heating PTC and the compressor to adjust the temperature of the battery simulation water tank;

[0015] The host computer is connected to the thermal management controller via the communication box to obtain control information or send control commands.

[0016] Preferably, a motor temperature sensor is provided in the motor simulation water tank, a first temperature sensor is provided at the outlet end of the motor radiator, the thermal management controller is connected to the motor temperature sensor and the first temperature sensor, and the thermal management controller controls the motor water pump and the fan according to the temperature values ​​measured by the motor temperature sensor and the first temperature sensor, thereby adjusting the temperature of the motor simulation water tank.

[0017] Preferably, a battery temperature sensor is provided in the battery simulation water tank, a second temperature sensor is provided at the inlet end of the battery water pump, and a third temperature sensor is provided at the outlet end of the battery heat exchanger connected to the coolant heating PTC; the thermal management controller is connected to the battery temperature sensor, the second temperature sensor and the third temperature sensor, and the thermal management controller controls the battery water pump, the compressor and the coolant heating PTC according to the temperature values ​​measured by the battery temperature sensor, the second temperature sensor and the third temperature sensor, thereby adjusting the temperature of the battery simulation water tank.

[0018] Preferably, the inlet and outlet ends of the compressor are respectively provided with a first pressure sensor and a second pressure sensor, and the thermal management controller is connected to the first pressure sensor and the second pressure sensor. The thermal management controller controls the compressor according to the pressure values ​​measured by the first pressure sensor and the second pressure sensor, thereby adjusting the temperature of the battery simulation water tank.

[0019] Preferably, the analog control unit further includes a power switch and a power supply, the power supply includes a low-voltage power supply and a high-voltage power supply, and an external power supply is connected to the low-voltage power supply and the high-voltage power supply via the power switch.

[0020] Preferably, the thermal management integrated unit is arranged in a module cabinet, the module cabinet is placed in a first frame, an openable door is arranged on the top of the first frame, transparent glass is arranged around the first frame; and lockable universal wheels are arranged on the bottom of the first frame.

[0021] Preferably, the simulation control unit is arranged at the upper part of the second frame, a table top is arranged in the middle part of the second frame, a drawer is arranged under the table top, and lockable universal wheels are arranged at the bottom of the second frame; a decorative panel is arranged at the upper part of the second frame, the host computer is arranged on the decorative panel, and a multimedia panel is also arranged on the decorative panel.

[0022] Based on the same concept, the present invention also provides a control method for a thermal management system test bench for teaching and training as described above, characterized in that it comprises the following steps:

[0023] Select the test object and its test mode, and confirm the control parameters according to the test mode;

[0024] The host computer sends control commands according to the test object, test mode and control parameters;

[0025] The thermal management controller collects relevant sensor information according to the received control command, controls the action of relevant response elements according to the pre-set control algorithm, and collects relevant sensor information in real time and feeds it back to the host computer;

[0026] The host computer evaluates the control effect based on the feedback information.

[0027] Preferably, the test object is a motor simulation water tank, the test mode represents different working conditions of the motor, and the control parameters include the simulated temperature and simulation duration of the motor under the working condition, the target control temperature and target control time of the motor; the control method includes:

[0028] Obtaining temperature values ​​measured by the motor temperature sensor and the first temperature sensor;

[0029] According to the comparison between the temperature value of the motor temperature sensor and the simulated temperature, the motor simulated heater is controlled to work, so that the temperature value measured by the motor temperature sensor is close to the simulated temperature, and the motor simulated heater is kept working for the simulated duration;

[0030] According to the comparison between the target temperature and the temperature value measured by the first temperature sensor, the motor water pump and the fan are controlled to work so that the temperature value measured by the first temperature sensor is close to the target temperature;

[0031] The thermal management controller feeds back the temperature values ​​measured by the first temperature sensor and the motor temperature sensor to the host computer in real time;

[0032] The host computer evaluates the control effect of the thermal management integrated unit on the temperature of the motor simulation water tank based on the comparison of the time when the temperature values ​​measured by the first temperature sensor and the motor temperature sensor are close to the target temperature and the target control time.

[0033] Preferably, the test object is a battery simulation water tank, the test mode represents different working conditions of the battery, and the control parameters include the simulated temperature and simulation duration of the battery under the working condition, the target control temperature and target control time of the battery; the control method includes:

[0034] Obtaining temperature values ​​measured by the battery temperature sensor and the second temperature sensor and the third temperature sensor;

[0035] According to the comparison between the temperature value of the battery temperature sensor and the simulated temperature, the battery simulated heater is controlled to work so that the temperature value measured by the battery temperature sensor is close to the simulated temperature, and the battery simulated heater is kept working for the simulated duration;

[0036] According to the comparison between the target temperature and the temperature value of the third temperature sensor, the battery water pump, the compressor or the coolant heating PTC is controlled to work so that the temperature value measured by the third temperature sensor is close to the target temperature;

[0037] The thermal management controller feeds back the collected temperature values ​​measured by the third temperature sensor and the battery temperature sensor to the host computer;

[0038] The host computer evaluates the control effect of the thermal management integrated unit on the temperature of the battery simulation water tank based on the comparison of the time when the temperature values ​​measured by the third temperature sensor and the battery temperature sensor are close to the target temperature and the target control time.

[0039] Compared with the prior art, the present invention has the following beneficial effects: the thermal management system test bench provided by the present invention for teaching and training simulates batteries and motors through a battery simulation water tank and a motor simulation water tank, and realizes hot melt state simulation by controlling the heating mode of the heaters therein, and realizes the simulation of the thermal capacity state of batteries and motors under various working conditions with high precision and low cost, which is helpful to evaluate the performance of the thermal management system under various complex working conditions; the thermal management integrated unit is built with real thermal management components, which can well simulate various working conditions of the thermal management system; multiple temperature sensors and pressure sensors are set to provide real-time feedback on the control state of the thermal management system; it is conducive to evaluating the control effect of the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of a thermal management system test bench used for teaching and training according to an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of a thermal management system test bench used for teaching and training according to an embodiment of the present invention;

[0042] Figure 3 This is an electrical control diagram of a thermal management system test bench used for teaching and training according to an embodiment of the present invention.

[0043] In the figure:

[0044] 1. Universal wheel; 2. Battery simulated water outlet pipe; 3. Battery simulated water inlet pipe; 4. Coolant heating PTC; 5. First frame; 6. Water pump group; 61. Battery water pump; 62. Motor water pump; 7. Motor radiator; 8. Module cabinet; 9. Fan; 10. Battery heat exchanger; 11. Thermal management controller; 12. Compressor group; 121. Compressor; 122. Condenser; 13. Table board; 14. High-voltage line; 15. Host computer; 16. Decorative panel; 17. Simulated heater group; 171. Battery simulated heater; 172. Motor simulated heater; 18. Battery simulated water tank; 19. High voltage power supply; 20. Low voltage power supply; 21. Communication box; 22. Door; 23. Power switch; 24. Multimedia panel; 25. Motor simulated water tank; 26. Drawer; 27. Second frame; 28. Universal wheel; 29. ​​Motor simulated water inlet pipe; 30. Motor simulated water outlet pipe; 31. Low voltage line; 32. Low voltage line;

[0045] 40. Thermal expansion valve; 41. First temperature sensor; 42. Second temperature sensor; 43. Third temperature sensor; 44. Battery temperature sensor; 45. Motor temperature sensor; 46. First pressure sensor; 47. Second pressure sensor. DETAILED DESCRIPTION

[0046] In order to make the purpose, features and beneficial effects of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] Figure 1 This is a schematic diagram of the structure of a thermal management system test bench used for teaching and training according to an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of a thermal management system test bench used for teaching and training according to an embodiment of the present invention; Figure 3 This is an electrical control diagram of a thermal management system test bench used for teaching and training according to an embodiment of the present invention.

[0050] See also Figure 1-Figure 3The thermal management system test bench for teaching and training of the embodiment of the present invention comprises a thermal management integrated unit and a simulation control unit, wherein the thermal management integrated unit comprises a thermal management controller 11, a water pump unit 6, a motor radiator 7, a fan 9, a battery heat exchanger 10, a compressor unit 12 and a coolant heating PTC 4; the water pump unit 6 comprises a battery water pump 61 and a motor water pump 62; the compressor unit 12 comprises a compressor 121 and a condenser 122; the simulation control unit comprises a host computer 15, a communication box 21, a battery simulation water tank 18, a motor simulation water tank 25 and a simulation heater unit 17, and the simulation heater unit 17 comprises a battery simulation heater 171 and a motor simulation heater 172;

[0051] The battery simulation heater 171 is connected to the battery simulation water tank 18 and controls the heating mode to simulate the thermal capacity state of the battery; the motor simulation heater 172 is connected to the motor simulation water tank 25 and controls the heating mode to simulate the thermal capacity state of the motor; the simulation of the thermal capacity state of the battery and the motor of the new energy vehicle under various working conditions during actual driving is realized, which is helpful to evaluate the performance of the thermal management system under various complex working conditions.

[0052] The motor simulation water tank 25, the motor water pump 62 and the motor radiator 7 are connected by pipelines to form a motor thermal management loop; the battery simulation water tank 18, the battery water pump 61, the battery heat exchanger 10 and the coolant heating PTC 4 are connected by pipelines to form a battery thermal management loop; the battery heat exchanger 10, the compressor 121 and the condenser 122 are connected by pipelines to form a refrigerant loop;

[0053] The thermal management controller 11 is connected to and controls the motor water pump 62 and the fan 9 to adjust the temperature of the motor simulation water tank 25; the thermal management controller 11 is connected to and controls the battery water pump 61, the coolant heating PTC 4 and the compressor 121 to adjust the temperature of the battery simulation water tank 18;

[0054] The host computer 15 is connected to the thermal management controller 11 via the communication box 21 to obtain control information or send control commands.

[0055] Specifically, the fan 9 is disposed at the motor radiator 7 to enhance the heat dissipation effect of the motor radiator 7 .

[0056] Specifically, a thermal expansion valve 40 is provided at the inlet end of the battery heat exchanger 10 connected to the condenser 122 to adjust the flow rate.

[0057] In some embodiments, the thermal management integrated unit is arranged in a module cabinet 8, the module cabinet 8 is placed in a first frame 5, an openable door is arranged on the top of the first frame 5, and transparent glass is arranged around the first frame 5; a lockable universal wheel 1 is arranged at the bottom of the first frame 5.

[0058] In some embodiments, the simulation control unit is arranged on the upper part of the second frame 27, and an openable door 22 is arranged on the top of the second frame 27; a table top 13 is arranged in the middle part of the second frame 27, a drawer 26 is arranged under the table top 13, and a lockable universal wheel 28 is arranged at the bottom of the second frame 27; the second shell 22 is provided with a decorative panel 16, the upper computer 15 is arranged on the decorative panel 16, and a multimedia panel 24 is also arranged on the decorative panel 16.

[0059] Specifically, the multimedia panel 24 is connected to the host computer 15 to realize auxiliary display during teaching, which is helpful for teaching.

[0060] The frame is designed to be movable. After being moved to the required position, the bottom wheels can be fixed and locked, which greatly increases the convenience and reliability of use.

[0061] Specifically, the operation panels of the battery simulation heater 171 and the motor simulation heater 172 are provided on the decoration panel 16 .

[0062] Specifically, the battery simulation water tank 18 is connected to the battery water pump 61 and the coolant heating PTC 4 in the first frame 5 through the battery simulation water outlet pipe 2 and the battery simulation water inlet pipe 3 respectively; the motor simulation water tank 25 is connected to the motor radiator 7 and the motor water pump 62 in the first frame 5 through the motor simulation water inlet pipe 29 and the motor simulation water outlet pipe 30 respectively.

[0063] In some embodiments, a motor temperature sensor 45 is provided in the motor simulation water tank 25, a first temperature sensor 41 is provided at the outlet end of the motor radiator 7, and the thermal management controller 11 is connected to the motor temperature sensor 45 and the first temperature sensor 41. The thermal management controller 11 controls the motor water pump 62 and the fan 9 according to the temperature values ​​measured by the motor temperature sensor 45 and the first temperature sensor 41, thereby adjusting the temperature of the motor simulation water tank 25.

[0064] In some embodiments, a battery temperature sensor 44 is provided in the battery simulation water tank 18, a second temperature sensor 42 is provided at the inlet end of the battery water pump 61, and a third temperature sensor 43 is provided at the outlet end of the battery heat exchanger 10 connected to the coolant heating PTC; the thermal management controller 11 is connected to the battery temperature sensor 44, the second temperature sensor 42 and the third temperature sensor 43, and the thermal management controller 11 controls the battery water pump 61, the compressor 121 and the coolant heating PTC 4 according to the temperature values ​​measured by the battery temperature sensor 44, the second temperature sensor 42 and the third temperature sensor 43, thereby adjusting the temperature of the battery simulation water tank 18.

[0065] In some embodiments, the inlet and outlet ends of the compressor 121 are respectively provided with a first pressure sensor 46 and a second pressure sensor 47, and the thermal management controller 11 is connected to the first pressure sensor 46 and the second pressure sensor 47. The thermal management controller 11 controls the compressor 121 according to the pressure values ​​measured by the first pressure sensor 46 and the second pressure sensor 47, thereby adjusting the temperature of the battery simulation water tank 18.

[0066] In some embodiments, the analog control unit 11 also includes a power switch 23 and a power supply, the power supply includes a low-voltage power supply 20 and a high-voltage power supply 19, and the external power supply is connected to the low-voltage power supply 20 and the high-voltage power supply 19 via the power switch 23.

[0067] Specifically, the low-voltage power supply 20 is connected to the thermal management integrated unit in the first frame 5 through the low-voltage lines 30 and 31 to realize low-voltage power supply; the high-voltage power supply 19 is connected to the thermal management integrated unit in the first frame 5 through the high-voltage line 14 to realize high-voltage power supply.

[0068] Specifically, the operation panels of the low-voltage power supply 20 and the high-voltage power supply 19 are provided on the decorative panel.

[0069] The present invention also provides a control method for a thermal management system test bench used for teaching and training, comprising the following steps:

[0070] Select the test object and its test mode, and confirm the control parameters according to the test mode;

[0071] The host computer 15 sends control commands according to the test object, test mode and control parameters;

[0072] The thermal management controller 11 collects relevant sensor information according to the received control command, controls the action of relevant response elements according to the preset control algorithm, and collects relevant sensor information in real time and feeds it back to the host computer 15;

[0073] The host computer 15 evaluates the control effect according to the feedback information.

[0074] In some embodiments, the test object is a motor simulation water tank 25, the test mode represents different working conditions of the motor, and the control parameters include the simulated temperature and simulation duration of the motor under the working condition, the target control temperature and target control time of the motor; the control method includes:

[0075] Acquire temperature values ​​measured by the motor temperature sensor 45 and the first temperature sensor 41;

[0076] According to the comparison between the temperature value of the motor temperature sensor 45 and the simulated temperature, the motor simulated heater 172 is controlled to work, so that the temperature value measured by the motor temperature sensor 45 is close to the simulated temperature, and the motor simulated heater 172 is kept working for the simulated duration;

[0077] According to the comparison between the target temperature and the temperature value measured by the first temperature sensor 41, the motor water pump 62 and the fan 9 are controlled to work so that the temperature value measured by the first temperature sensor 41 is close to the target temperature;

[0078] The thermal management controller 11 feeds back the temperature values ​​measured by the first temperature sensor 41 and the motor temperature sensor 45 to the host computer 15 in real time;

[0079] The host computer 15 evaluates the control effect of the thermal management integrated unit on the temperature of the motor simulation water tank 25 based on the comparison of the time when the temperature values ​​measured by the first temperature sensor 41 and the motor temperature sensor 45 are close to the target temperature and the target control time.

[0080] In some embodiments, the test object is a battery simulation water tank 18, the test mode represents different working conditions of the battery, and the control parameters include the simulated temperature and simulation duration of the battery under the working condition, the target control temperature and target control time of the battery; the control method includes:

[0081] Acquire the temperature values ​​measured by the battery temperature sensor 44 and the second temperature sensor 42 and the third temperature sensor 43;

[0082] According to the comparison between the temperature value of the battery temperature sensor 44 and the simulated temperature, the battery simulated heater 171 is controlled to work so that the temperature value measured by the battery temperature sensor 44 is close to the simulated temperature, and the battery simulated heater 171 is kept working for the simulated duration;

[0083] According to the comparison between the target temperature and the temperature value of the third temperature sensor 43, the battery water pump 61, the compressor 121 or the coolant heating PTC 4 is controlled to work so that the temperature value measured by the third temperature sensor 43 is close to the target temperature;

[0084] Specifically, when the target temperature is greater than the temperature value of the third temperature sensor 43, the battery water pump 61 and the coolant heating PTC 4 are controlled to work, and the water in the pipeline is heated, so that the temperature value measured by the third temperature sensor 43 is close to the target temperature; when the target temperature is less than the temperature value of the third temperature sensor 43, the battery water pump 61 and the compressor 121 are controlled to work, and the water in the pipeline is cooled, so that the temperature value measured by the third temperature sensor 43 is close to the target temperature;

[0085] The thermal management controller 11 feeds back the collected temperature values ​​measured by the third temperature sensor 43 and the battery temperature sensor 44 to the host computer 15;

[0086] The host computer 15 evaluates the control effect of the thermal management integrated unit on the temperature of the battery simulation water tank 18 based on the comparison between the time when the temperature values ​​measured by the third temperature sensor 43 and the battery temperature sensor 44 are close to the target temperature and the target control time.

[0087] Specifically, the test object is fan 9, the test mode includes speed control or temperature control, and the control parameters include target speed or target temperature; the host computer 15 sends a fan 9 speed or motor temperature control command, and the thermal management controller 11 obtains the speed information fed back by the fan 9 and sends it to the host computer 15 to realize fan 9 speed control, or the thermal management controller 11 obtains the temperature values ​​measured by the first sensor 41 and the motor temperature sensor 45 and sends them to the host computer 15 to observe the impact of the fan speed change on the temperature of the motor thermal management circuit and the motor simulation water tank 25.

[0088] Specifically, the control object may also be the motor water pump 62, the compressor 121, the coolant heating PTC 4 or the battery water pump 61. The test mode and control parameters are similar to those of the fan 9 and will not be described in detail here.

[0089] The thermal management system test bench used for teaching and training in the embodiment of the present invention uses this test bench and is equipped with a highly simulated new energy vehicle thermal management integrated unit, which can accurately and meticulously simulate the thermal management operation status of a real vehicle under different working conditions; realize the relevant principles and implementation plans of new energy vehicle motor cooling, battery cooling and battery heating; can learn the relevant structures, principles and functions of key components such as water pumps, fans 9, compressors 121, coolant heating PTC 4, and battery heat exchangers 10; can learn the control logic related knowledge of motor and battery thermal management; and realize the test verification of thermal management function parameters.

[0090] The thermal management system test bench used for teaching and training in the embodiment of the present invention is an important tool for learning and practicing the functions of the thermal management system of pure electric vehicles. It can help users better understand and master the working principles and control strategies of the thermal management system, improve practical and innovative capabilities, and is of great significance for cultivating professional talents in related fields.

[0091] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make slight modifications and improvements without departing from the spirit and scope of the present invention, which are still within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims.

Claims

1. A thermal management system test bench used for teaching and training, characterized in that: It includes a thermal management integrated unit and a simulation control unit, wherein the thermal management integrated unit includes a thermal management controller, a water pump unit, a motor radiator, a fan, a battery heat exchanger, a compressor unit and a coolant heating PTC; the water pump unit includes a battery water pump and a motor water pump; the compressor unit includes a compressor and a condenser; the simulation control unit includes a host computer, a communication box, a battery simulation water tank, a motor simulation water tank and a simulation heater unit, and the simulation heater unit includes a battery simulation heater and a motor simulation heater; The battery simulation heater is connected to the battery simulation water tank and controls the heating mode to simulate the thermal capacity state of the battery; the motor simulation heater is connected to the motor simulation water tank and controls the heating mode to simulate the thermal capacity state of the motor; The motor simulation water tank, the motor water pump and the motor radiator are connected through pipelines to form a motor thermal management loop; the battery simulation water tank, the battery water pump, the battery heat exchanger and the coolant heating PTC are connected through pipelines to form a battery thermal management loop; the battery heat exchanger, the compressor and the condenser are connected through pipelines to form a refrigerant loop; The thermal management controller is connected to and controls the motor water pump and the fan to adjust the temperature of the motor simulation water tank; the thermal management controller is connected to and controls the battery water pump, the coolant heating PTC and the compressor to adjust the temperature of the battery simulation water tank; The host computer is connected to the thermal management controller via the communication box to obtain control information or send control commands.

2. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: A motor temperature sensor is arranged in the motor simulation water tank, a first temperature sensor is arranged at the outlet end of the motor radiator, the thermal management controller is connected to the motor temperature sensor and the first temperature sensor, and the thermal management controller controls the motor water pump and the fan according to the temperature values ​​measured by the motor temperature sensor and the first temperature sensor, thereby adjusting the temperature of the motor simulation water tank.

3. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: A battery temperature sensor is provided in the battery simulation water tank, a second temperature sensor is provided at the inlet end of the battery water pump, and a third temperature sensor is provided at the outlet end of the battery heat exchanger connected to the coolant heating PTC; the thermal management controller is connected to the battery temperature sensor, the second temperature sensor and the third temperature sensor, and the thermal management controller controls the battery water pump, the compressor and the coolant heating PTC according to the temperature values ​​measured by the battery temperature sensor, the second temperature sensor and the third temperature sensor, thereby adjusting the temperature of the battery simulation water tank.

4. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: The inlet and outlet ends of the compressor are respectively provided with a first pressure sensor and a second pressure sensor, and the thermal management controller is connected to the first pressure sensor and the second pressure sensor. The thermal management controller controls the compressor according to the pressure values ​​measured by the first pressure sensor and the second pressure sensor, thereby adjusting the temperature of the battery simulation water tank.

5. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: The analog control unit also includes a power switch and a power supply, the power supply includes a low-voltage power supply and a high-voltage power supply, and an external power supply is connected to the low-voltage power supply and the high-voltage power supply via the power switch.

6. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: The thermal management integrated unit is arranged in a module cabinet, the module cabinet is placed in a first frame, an openable door is arranged on the top of the first frame, transparent glass is arranged around the first frame, and lockable universal wheels are arranged on the bottom of the first frame.

7. The thermal management system test bench for teaching and training as claimed in claim 1, characterized in that: The analog control unit is arranged on the upper part of the second frame, a table top is arranged in the middle part of the second frame, a drawer is arranged under the table top, and lockable universal wheels are arranged at the bottom of the second frame; a decorative panel is arranged on the upper part of the second frame, the host computer is arranged on the decorative panel, and a multimedia panel is also arranged on the decorative panel.

8. A control method for a thermal management system test bench used for teaching and training as claimed in any one of claims 1 to 7, characterized in that: The steps include: Select the test object and its test mode, and confirm the control parameters according to the test mode; The host computer sends control commands according to the test object, test mode and control parameters; The thermal management controller collects relevant sensor information according to the received control command, controls the action of relevant response elements according to the pre-set control algorithm, and collects relevant sensor information in real time and feeds it back to the host computer; The host computer evaluates the control effect based on the feedback information.

9. The control method of the thermal management system test bench for teaching and training as claimed in claim 8, characterized in that: The test object is a motor simulation water tank, the test mode represents different working conditions of the motor, and the control parameters include the simulated temperature and simulation duration of the motor under the working condition, the target control temperature and target control time of the motor; the control method includes: Obtaining temperature values ​​measured by the motor temperature sensor and the first temperature sensor; According to the comparison between the temperature value of the motor temperature sensor and the simulated temperature, the motor simulated heater is controlled to work, so that the temperature value measured by the motor temperature sensor is close to the simulated temperature, and the motor simulated heater is kept working for the simulated duration; According to the comparison between the target temperature and the temperature value measured by the first temperature sensor, the motor water pump and the fan are controlled to work so that the temperature value measured by the first temperature sensor is close to the target temperature; The thermal management controller feeds back the temperature values ​​measured by the first temperature sensor and the motor temperature sensor to the host computer in real time; The host computer evaluates the control effect of the thermal management integrated unit on the temperature of the motor simulation water tank based on the comparison of the time when the temperature values ​​measured by the first temperature sensor and the motor temperature sensor are close to the target temperature and the target control time.

10. The control method of the thermal management system test bench for teaching and training as claimed in claim 8, characterized in that: The test object is a battery simulation water tank, the test mode represents different working conditions of the battery, and the control parameters include the simulated temperature and simulation duration of the battery under the working condition, the target control temperature and target control time of the battery; the control method includes: Obtaining temperature values ​​measured by the battery temperature sensor and the second temperature sensor and the third temperature sensor; According to the comparison between the temperature value of the battery temperature sensor and the simulated temperature, the battery simulated heater is controlled to work so that the temperature value measured by the battery temperature sensor is close to the simulated temperature, and the battery simulated heater is kept working for the simulated duration; According to the comparison between the target temperature and the temperature value of the third temperature sensor, the battery water pump, the compressor or the coolant heating PTC is controlled to work so that the temperature value measured by the third temperature sensor is close to the target temperature; The thermal management controller feeds back the collected temperature values ​​measured by the third temperature sensor and the battery temperature sensor to the host computer; The host computer evaluates the control effect of the thermal management integrated unit on the temperature of the battery simulation water tank based on the comparison of the time when the temperature values ​​measured by the third temperature sensor and the battery temperature sensor are close to the target temperature and the target control time.

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