An r290 refrigerant thermal management system, method, and storage medium

Abstract

This invention provides an R290 refrigerant thermal management system, method, and storage medium, belonging to the field of refrigerant management. It includes a thermal management controller, a pressure sensor group, a water temperature sensor, and a thermal management component. The thermal management controller is connected to the pressure sensor group, water temperature sensor, and thermal management component, respectively. The thermal management component is connected to both the pressure sensor group and the water temperature sensor. The pressure sensor group is used to collect refrigerant pressure data from the thermal management component. The water temperature sensor is used to collect refrigerant water circuit temperature data from the thermal management component. This invention improves the system's adaptability, control accuracy, and operational stability, solving the problems of poor operating condition adaptability, insufficient control accuracy, weak operational stability, and poor coordination of actuator actions in existing R290 refrigerant automotive thermal management systems. It meets the application requirements of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

Description

Technical Field

[0001] This invention relates to the field of refrigerant management technology, specifically to an R290 refrigerant thermal management system, method, and storage medium. Background Technology

[0002] As the advantages of R290 refrigerant in terms of environmental protection and energy efficiency become more prominent, its application in automotive thermal management systems is gradually becoming more widespread. However, existing R290 refrigerant thermal management systems have the following drawbacks: 1) The system's operating modes are not sufficiently covered, making it difficult to adapt to the switching requirements of multiple scenarios such as vehicle waste heat recovery, heat pump defrosting, and ultra-low temperature hot gas bypass. The control logic under different operating conditions lacks coordination. 2) The system control strategy is not refined enough. It mostly uses single PI control or fixed parameter control without introducing feedforward compensation optimization. This results in large steady-state fluctuations after the adjustment response of core controlled parameters such as outlet water temperature and intake superheat, which affects the control accuracy and dynamic response performance of thermal management. 3) The lack of customized control schemes for the thermodynamic characteristics of R290 refrigerant, and the failure to accurately calculate the evaporation temperature based on REFPROP software to optimize superheat control, resulted in low system energy efficiency and insufficient stability. 4) The regulation of actuators such as electronic expansion valves and water pumps in the system lacks a unified and coordinated control logic. The actions of each component are not synchronized, resulting in unsmooth loop switching, increased energy loss, and further affecting the overall operating efficiency of the system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an R290 refrigerant thermal management system, method and storage medium to address the shortcomings of the prior art.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: An R290 refrigerant thermal management system, comprising a thermal management controller, a pressure sensor group, a water temperature sensor, and thermal management components. The thermal management controller is connected to the pressure sensor group, the water temperature sensor and the thermal management component respectively, and the thermal management component is connected to the pressure sensor group and the water temperature sensor respectively. The pressure sensor group is used to acquire refrigerant pressure data from the thermal management component; The water temperature sensor is used to collect refrigerant water circuit temperature data from the thermal management component; The thermal management controller is used to import refrigerant control commands and generate a refrigerant control mode based on the refrigerant control commands; The thermal management component is controlled based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

[0005] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: A thermal management method for R290 refrigerant, comprising the following steps: Refrigerant pressure data is acquired from the thermal management components using a pressure sensor array; The refrigerant water temperature data is collected from the thermal management component using a water temperature sensor; Import refrigerant control commands and generate a refrigerant control mode based on the refrigerant control commands; The thermal management component is controlled based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

[0006] The beneficial effects of this invention are as follows: refrigerant pressure data is collected from the thermal management component through a pressure sensor group, and refrigerant water circuit temperature data is collected from the thermal management component through a water temperature sensor. A refrigerant control mode is generated according to the refrigerant control command. The thermal management component is controlled according to the refrigerant control mode, refrigerant pressure data, and refrigerant water circuit temperature data, which improves the system's adaptability, control accuracy, and operational stability. It solves the problems of poor working condition adaptability, insufficient control accuracy, weak operational stability, and poor coordination of actuator actions in existing R290 refrigerant automotive thermal management systems, and meets the application needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery. Attached Figure Description

[0007] Figure 1 A module block diagram of an R290 refrigerant thermal management system provided in an embodiment of the present invention; Figure 2 A connection block diagram of the thermal management controller, pressure sensor group, water temperature sensor and thermal management components of an R290 refrigerant thermal management system provided in an embodiment of the present invention. Figure 3 A connection diagram of the thermal management components of an R290 refrigerant thermal management system provided in an embodiment of the present invention; Figure 4 A schematic diagram of a first four-way valve, a second four-way valve, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifth three-way valve, and a sixth three-way valve provided in an embodiment of the R290 refrigerant thermal management system of the present invention; Figure 5 This is a schematic flowchart of an R290 refrigerant thermal management method provided in an embodiment of the present invention. Detailed Implementation

[0008] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0009] Figure 1 This is a block diagram of an R290 refrigerant thermal management system provided in an embodiment of the present invention.

[0010] like Figure 1 and 2 As shown, an R290 refrigerant thermal management system includes a thermal management controller, a pressure sensor group, a water temperature sensor, and thermal management components. The thermal management controller is connected to the pressure sensor group, the water temperature sensor and the thermal management component respectively, and the thermal management component is connected to the pressure sensor group and the water temperature sensor respectively. The pressure sensor group is used to acquire refrigerant pressure data from the thermal management component; The water temperature sensor is used to collect refrigerant water circuit temperature data from the thermal management component; The thermal management controller is used to import refrigerant control commands and generate a refrigerant control mode based on the refrigerant control commands; The thermal management component is controlled based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

[0011] In the above embodiments, refrigerant pressure data is collected from the thermal management component through a pressure sensor group, and refrigerant water circuit temperature data is collected from the thermal management component through a water temperature sensor. A refrigerant control mode is generated according to the refrigerant control command. The thermal management component is controlled according to the refrigerant control mode, refrigerant pressure data, and refrigerant water circuit temperature data, which improves the system's adaptability, control accuracy, and operational stability. It solves the problems of poor working condition adaptability, insufficient control accuracy, weak operational stability, and poor coordination of actuator actions in existing R290 refrigerant automotive thermal management systems, and meets the application requirements of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0012] Optionally, as an embodiment of the present invention, such as Figure 3 and 4As shown, the thermal management components include an electric compressor, an LTR low-temperature radiator, a water-cooled condenser, a liquid storage tank, a battery cooler, a motor and electronic control assembly, a power battery, a Heater cabin heating core, a Cooler cabin cooling core, a small-diameter electronic expansion valve, a first large-diameter electronic expansion valve, a second large-diameter electronic expansion valve, a first four-way valve, a second four-way valve, an HVAC water pump, a battery water pump, a motor water pump, an LTR water pump, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifth three-way valve, a sixth three-way valve, a first water tank, a second water tank, a first three-way pipe, a second three-way pipe, a third three-way pipe, a fourth three-way pipe, a fifth three-way pipe, a sixth three-way pipe, a seventh three-way pipe, an eighth three-way pipe, a ninth three-way pipe, and a thirteenth three-way pipe; The first port of the electric compressor is connected to the thermal management controller via a CAN bus. The first port of the LTR cryogenic radiator is connected to the thermal management controller via a PWM bus. The first port of the first four-way valve is connected to the thermal management controller via a LIN bus. The first port of the second four-way valve is connected to the thermal management controller via a LIN bus. The first port of the first three-way valve is connected to the thermal management controller via a LIN bus. The first port of the second three-way valve is connected to the thermal management controller via a LIN bus. The first port of the third three-way valve is connected to the thermal management controller via a LIN bus. The first port of the fourth three-way valve is connected to the thermal management controller via a LIN bus. The first port of the fifth three-way valve is connected to the thermal management controller via a LIN bus. The first port of the small-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus. The controller is connected as follows: the first port of the first large-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus; the first port of the second large-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus; the first port of the HVAC water pump is connected to the thermal management controller via a PWM bus; the first port of the battery water pump is connected to the thermal management controller via a PWM bus; the first port of the motor water pump is connected to the thermal management controller via a LIN bus; the first port of the LTR water pump is connected to the thermal management controller via a LIN bus; the first port of the sixth three-way valve is connected to the thermal management controller via a hard wire; the pressure sensor group is connected to PT1, PT2, PT3, and PT4 measuring points respectively; and the water temperature sensor is connected to T1, T2, T3, T4, T5, and T6 measuring points respectively. The second port of the electric compressor is connected to the first port of the first three-way pipe. The third port of the electric compressor is connected to both the PT2 measuring point and the first port of the second three-way pipe. The second port of the first three-way pipe is connected to both the PT2 measuring point and the second port of the first large-diameter electronic expansion valve. The third port of the first large-diameter electronic expansion valve is connected to the second port of the second three-way pipe. The third port of the second three-way pipe is connected to the second port of the second large-diameter electronic expansion valve. The third port of the second large-diameter electronic expansion valve is connected to the second port of the water-cooled condenser. The third port of the water-cooled condenser is connected to both the PT4 measuring point and the first port of the liquid storage tank. One end of the liquid storage tank is connected to the second port of the small-diameter electronic expansion valve. The third port of the small-diameter electronic expansion valve is connected to the first port of the battery cooler. The second port of the battery cooler is connected to both the PT1 measuring point and the third port of the first three-way pipe. The fourth port of the water-cooled condenser is connected to the second port of the first four-way valve. The third port of the first four-way valve is connected to the third port of the battery cooler. The fourth port of the first four-way valve is connected to the first port of the third three-way pipe. The fifth port of the first four-way valve is connected to the second port of the battery water pump. The second port of the third three-way pipe is connected to the first port of the fourth three-way pipe. The third port of the third three-way pipe is connected to the second port of the motor-pump. The third port of the motor-pump is connected to the T4 measuring point and one end of the motor control assembly. The other end of the motor control assembly is connected to the second port of the fourth three-way pipe. The third port of the fourth three-way pipe is connected to the T5 measuring point and the second port of the first three-way valve. The third port of the first three-way valve is connected to the first port of the fifth three-way pipe. The fourth port of the first three-way valve is connected to the first port of the sixth three-way pipe. The second port of the sixth three-way pipe is connected to the second port of the second three-way valve. The third port of the sixth three-way pipe is connected to the first port of the seventh three-way pipe. The second port of the seventh three-way pipe is connected to the second port of the third three-way valve. The third port of the seventh three-way pipe is connected to the second port of the LTR low-temperature radiator and one end of the first kettle. The third port of the LTR low-temperature radiator is connected to the T6 measuring point and the third port of the third three-way valve. The fourth port of the third three-way valve is connected to the other end of the first kettle and the second port of the HVAC water pump. The third port of the HVAC water pump is connected to the second port of the second four-way valve. The third port of the second four-way valve is connected to the fifth port of the water-cooled condenser. The fourth port of the second four-way valve is connected to the fourth port of the battery cooler.The fifth port of the second four-way valve is connected to one end of the second kettle and the first port of the eighth three-way pipe. The second port of the eighth three-way pipe is connected to the first port of the ninth three-way pipe. The third port of the eighth three-way pipe is connected to the third port of the second three-way valve. The fourth port of the second three-way valve is connected to one end of the Heater cabin heating element. The other end of the Heater cabin heating element is connected to the second port of the fifth three-way pipe. The third port of the fifth three-way pipe is connected to the second port of the fourth three-way valve. The third port of the fourth three-way valve is connected to the T1 measuring point and the third port of the battery water pump. The fourth port of the fourth three-way valve is connected to the second port of the fifth three-way valve. The third port of the fifth three-way valve is connected to one end of the Cooler passenger compartment cooling core. The other end of the Cooler passenger compartment cooling core is connected to the second port of the ninth three-way pipe. The third port of the ninth three-way pipe is connected to the second port of the sixth three-way valve. The third port of the sixth three-way valve is connected to the first port of the thirteenth thirteenth pipe. The second port of the thirteenth thirteenth pipe is connected to the fourth port of the fifth three-way valve. The third port of the thirteenth thirteenth pipe is connected to the T2 measuring point and one end of the power battery. The other end of the power battery is connected to the T3 measuring point, the other end of the second water tank, and the second port of the LTR water pump. The third port of the LTR water pump is connected to the fourth port of the sixth three-way valve.

[0013] Preferably, the first four-way valve can be a four-way valve 1, the second four-way valve can be a four-way valve 2, the first three-way valve can be a three-way valve 2, the second three-way valve can be a three-way valve 6, the third three-way valve can be a three-way valve 1, the fourth three-way valve can be a three-way proportional valve 3, the fifth three-way valve can be a three-way proportional valve 4, and the sixth three-way valve can be a three-way valve 5.

[0014] It should be understood that, as Figure 3 As shown, the system comprises key components such as an electric compressor, water-cooled condenser, chiller, heating element, cooling element, radiator, four-way valve 1, four-way valve 2, three-way valves (1-2, 5-6), three-way proportional valve (3-4), and water pumps 1-4. Figure 4 As shown, the architecture consists of two four-way valves, four three-way valves, and five three-way proportional valves.

[0015] In the above embodiments, the thermal management components solve the problems of poor adaptability to operating conditions, insufficient control precision, weak operational stability and poor coordination of actuators in existing R290 refrigerant automotive thermal management systems, and meet the needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting and automotive waste heat recovery.

[0016] Optionally, as an embodiment of the present invention, the refrigerant control mode includes a cooling mode, a heating mode, a passive cooling mode, a waste heat recovery heating combination mode, a dehumidification mode, or a defrosting mode. In the thermal management controller, the process of controlling the thermal management component based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: The thermal management component is controlled based on the cooling mode, the refrigerant pressure data, and the refrigerant water circuit temperature data. The thermal management component is controlled based on the heating mode, the refrigerant pressure data, and the refrigerant water temperature data. If the refrigerant control mode is passive cooling mode, then the electric compressor, the small-diameter electronic expansion valve, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted according to the preset passive cooling component adjustment table. The thermal management component is controlled based on the waste heat recovery heating combination mode and the refrigerant water circuit temperature data; The thermal management component is controlled according to the dehumidification mode and the refrigerant water circuit temperature data; The thermal management component is controlled based on the defrosting mode and the refrigerant water circuit temperature data.

[0017] It should be understood that, as shown in Table 1, Table 1 is a preset adjustment table for passive cooling components.

[0018] Table 1 In the above embodiments, the thermal management components are controlled according to the refrigerant control mode, refrigerant pressure data, and refrigerant water circuit temperature data, which improves the system's adaptability, control accuracy, and operational stability. This solves the problems of poor working condition adaptability, insufficient control accuracy, weak operational stability, and poor coordination of actuator actions in existing R290 refrigerant automotive thermal management systems, and meets the application needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0019] Optionally, as an embodiment of the present invention, the refrigerant water circuit temperature data includes the first motor water temperature value, the second motor water temperature value, the third motor water temperature value, the first battery cooler outlet water temperature value, the second battery cooler outlet water temperature value, and the third battery cooler outlet water temperature value obtained from the T1 measuring point, and the first battery inlet water temperature value obtained from the T2 measuring point. The pressure sensor group includes an HPT high-pressure sensor, and the refrigerant pressure data includes a first air conditioning pressure value, a second air conditioning pressure value, and a third air conditioning pressure value obtained from the HPT high-pressure sensor, as well as a first refrigerant pressure value, a second refrigerant pressure value, and a third refrigerant pressure value obtained from the PT1 measuring point by the HPT high-pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the cooling mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: If the cooling mode is the crew cabin cooling mode, then the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, so as to adjust the outlet water temperature of the first battery cooler to the preset first target temperature value. The first refrigerant pressure value is calculated using the REFPROP tool to obtain the first evaporation temperature value; The difference between the outlet water temperature of the first battery cooler and the first evaporation temperature is calculated to obtain the outlet superheat temperature of the first battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the first battery cooler outlet to a preset second target temperature value. The first fan speed adjustment data is obtained from the preset passenger compartment cooling fan adjustment table based on the first motor water temperature value and the first air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the first fan speed adjustment data. According to the preset crew cabin cooling component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the cooling mode is battery cooling mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the second battery cooler to the preset third target temperature value. The second refrigerant pressure value is calculated using the REFPROP tool to obtain the second evaporation temperature value; The difference between the outlet water temperature of the second battery cooler and the second evaporation temperature is calculated to obtain the outlet superheat temperature of the second battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the second battery cooler outlet to the preset second target temperature value. The second fan speed adjustment data is obtained from the preset battery cooling fan adjustment table based on the second motor water temperature value and the second air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the second fan speed adjustment data; According to the preset battery cooling component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the cooling mode is a dual cooling mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the third battery cooler to the preset first target temperature value. The third refrigerant pressure value is calculated using the REFPROP tool to obtain the third evaporation temperature value; The difference between the outlet water temperature of the third battery cooler and the third evaporation temperature is calculated to obtain the outlet superheat temperature of the third battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the third battery cooler to the preset second target temperature value. The third fan speed adjustment data is obtained from the preset dual cooling fan adjustment table based on the third motor water temperature value and the third air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the third fan speed adjustment data; The sixth three-way valve is adjusted using a PWM control algorithm to bring the water temperature of the first battery into a preset first target temperature range. The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual-refrigeration component adjustment table.

[0020] Specifically, in the occupant cabin cooling mode, the compressor speed controls the chiller outlet water temperature (the acquired signal is T1 temperature) (i.e., the first battery cooler outlet water temperature value) through PI plus feedforward control (i.e., PI control algorithm and feedforward control algorithm), with a target temperature of 3℃ (i.e., the preset first target temperature value); the EXV1 (i.e., small-diameter electronic expansion valve) opening is controlled by PI plus feedforward control (i.e., PI control algorithm and feedforward control algorithm) to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software through the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the LTR fan speed is controlled in two levels, which must simultaneously meet the control table as shown in Table 2, and each actuator is adjusted according to Table 3. Table 2 is the preset occupant cabin cooling fan adjustment table, and Table 3 is the preset occupant cabin cooling component adjustment table.

[0021] Table 2 Table 3 It should be understood that in battery cooling mode, the compressor speed is controlled by PI plus feedforward to control the chiller outlet water temperature (the acquired signal is T1 temperature) (i.e., the second battery cooler outlet water temperature value), with a target temperature of 20℃ (i.e., the preset third target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (i.e., the second battery cooler outlet superheat temperature value) (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software with the measured pressure is the outlet superheat), with a target temperature of 5℃ (i.e., the preset second target temperature value); the LTR fan speed is controlled in two levels, which must simultaneously meet the control table as shown in Table 4, and each actuator is adjusted according to Table 5. Table 4 is the preset battery cooling fan adjustment table, and Table 5 is the preset battery cooling component adjustment table.

[0022] Table 4 Table 5 Specifically, in dual cooling mode, the compressor speed is controlled by a PI controller with feedforward to regulate the chiller outlet water temperature (the acquired signal is T1 temperature) (i.e., the outlet water temperature of the third battery cooler), with a target temperature of 3℃ (i.e., the preset first target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by a PI controller with feedforward to regulate the chiller outlet superheat (i.e., the outlet superheat temperature of the third battery cooler) (the acquired signal is PT1 temperature and pressure, calculated by subtracting the measured temperature from the evaporation temperature calculated using REFPROP software based on the measured pressure). The target temperature is 5℃ (i.e., the preset second target temperature value); the three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (the acquired signal is T2) (i.e., the first battery inlet water temperature value), and the target temperature is 15-25℃ (any value within the range is acceptable) (i.e., the preset first target temperature range) (the flow of the two branches is controlled by PWM); the LTR fan speed is controlled in two levels, and the control table shown in Table 6 must be met simultaneously. Each actuator is adjusted according to Table 7. Table 6 is the preset dual cooling fan adjustment table, and Table 7 is the preset dual cooling component adjustment table.

[0023] Table 6 Table 7 In the above embodiments, the thermal management components are controlled according to the cooling mode, refrigerant pressure data, and refrigerant water circuit temperature data, which solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability, and poor coordination of actuator actions in the existing R290 refrigerant automotive thermal management system. It meets the needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0024] Optionally, as an embodiment of the present invention, the refrigerant water circuit temperature data further includes the first WCC outlet water temperature value, the second WCC outlet water temperature value, the third WCC outlet water temperature value, the fourth WCC outlet water temperature value, the fifth WCC outlet water temperature value, and the sixth WCC outlet water temperature value obtained from the T1 measuring point, as well as the second battery inlet water temperature value and the third battery inlet water temperature value obtained from the T2 measuring point; The pressure sensor group also includes an LPT low-pressure sensor. The refrigerant pressure data also includes a first low-pressure value, a second low-pressure value, and a third low-pressure value obtained from the LPT low-pressure sensor; a fourth refrigerant pressure value, a fifth refrigerant pressure value, a sixth refrigerant pressure value, a seventh refrigerant pressure value, an eighth refrigerant pressure value, and a ninth refrigerant pressure value obtained from the PT1 measuring point by the HPT high-pressure sensor; a first WCC outlet pressure value, a second WCC outlet pressure value, and a third WCC outlet pressure value obtained from the PT4 measuring point by the HPT high-pressure sensor; and a fourth low-pressure value, a fifth low-pressure value, and a sixth low-pressure value obtained from the PT3 measuring point by the LPT low-pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the heating mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: If the heating mode is the crew cabin heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the first WCC outlet water temperature value to the preset fourth target temperature value. The fourth refrigerant pressure value was calculated using the REFPROP tool to obtain the fourth evaporation temperature value; The difference between the first WCC outlet water temperature value and the fourth evaporation temperature value is calculated to obtain the fourth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the fourth battery cooler outlet to the preset second target temperature value. The fourth fan speed adjustment data is obtained from the preset crew compartment heating fan adjustment table based on the first low pressure value, and the LTR low temperature radiator is adjusted according to the fourth fan speed adjustment data. According to the preset crew cabin heating component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the heating mode is the battery heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the second WCC outlet water temperature value to the preset fifth target temperature value. The fifth refrigerant pressure value was calculated using the REFPROP tool to obtain the fifth evaporation temperature value; The difference between the second WCC outlet water temperature value and the fifth evaporation temperature value is calculated to obtain the fifth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fifth battery cooler to the preset second target temperature value. The fifth fan speed adjustment data is obtained from the preset battery heating fan adjustment table based on the second low pressure value, and the LTR low temperature heat sink is adjusted according to the fifth fan speed adjustment data; According to the preset battery heating component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the heating mode is a dual heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the third WCC outlet water temperature value to the preset fourth target temperature value. The sixth refrigerant pressure value was calculated using the REFPROP tool to obtain the sixth evaporation temperature value; The difference between the third WCC outlet water temperature value and the sixth evaporation temperature value is calculated to obtain the sixth battery cooler outlet superheat temperature value; The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the sixth battery cooler to the preset second target temperature value. The sixth fan speed adjustment data is obtained from the preset dual heating fan adjustment table based on the third low pressure value, and the LTR low temperature heat sink is adjusted according to the sixth fan speed adjustment data. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the second battery to a preset second target temperature range; The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual heating component adjustment table. If the heating mode is the ultra-low temperature crew cabin heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the fourth WCC outlet water temperature value to the preset fourth target temperature value. The seventh refrigerant pressure value was calculated using the REFPROP tool to obtain the seventh evaporation temperature value; The difference between the fourth WCC outlet water temperature value and the seventh evaporation temperature value is calculated to obtain the seventh battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the seventh battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the first WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The fourth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. According to the preset adjustment table for the heating components of the cryogenic crew compartment, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the heating mode is the ultra-low temperature battery heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the fifth WCC outlet water temperature value to the preset fifth target temperature value. The eighth refrigerant pressure value was calculated using the REFPROP tool to obtain the eighth evaporation temperature value; The difference between the fifth WCC outlet water temperature value and the eighth evaporation temperature value is calculated to obtain the eighth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the eighth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the second WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The fifth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. According to the preset adjustment table for the ultra-low temperature battery heating components, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the heating mode is an extremely low temperature dual heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the sixth WCC to the preset fourth target temperature value. The ninth refrigerant pressure value was calculated using the REFPROP tool to obtain the ninth evaporation temperature value; The difference between the sixth WCC outlet water temperature value and the ninth evaporation temperature value is calculated to obtain the ninth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the ninth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the third WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The sixth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the third battery to the preset second target temperature range; The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual heating component adjustment table.

[0025] Specifically, in the crew cabin heating mode, the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the first WCC outlet water temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the EXV1 (i.e., the small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software based on the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the LTR fan speed is controlled in two levels, as shown in Table 8, and each actuator is adjusted according to Table 9. Table 8 is the preset crew cabin heating fan adjustment table, and Table 9 is the preset crew cabin heating component adjustment table.

[0026] Table 8 Table 9 It should be understood that in battery heating mode, the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the second WCC outlet water temperature value), with a target temperature of 35℃ (i.e., the preset fifth target temperature value); the EXV1 (i.e., the small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software based on the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the LTR fan speed is controlled in two levels, and the control table is shown in Table 10. Each actuator is adjusted according to Table 11. Table 10 is the preset battery heating fan adjustment table, and Table 11 is the preset battery heating component adjustment table.

[0027] Table 10 Table 11 Specifically, in dual heating mode, the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the third WCC outlet water temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the EXV1 (i.e., the small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (the acquired signal is T2) (i.e., the second battery inlet water temperature value), with a target temperature of 30-40℃ (any value within the range is acceptable) (i.e., the preset second target temperature range) (the flow of the two branches is controlled by PWM); the LTR fan speed is controlled in two levels, and the control table is shown in Table 12. Each actuator is adjusted according to Table 13. Table 12 is the preset dual heating fan adjustment table, and Table 13 is the preset dual heating component adjustment table.

[0028] Table 12 Table 13 It should be understood that when the crew cabin is in heating mode (ultra-low temperature hot gas bypass) (i.e., ultra-low temperature crew cabin heating mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the fourth WCC outlet water temperature value), and the target temperature is 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, calculated by subtracting the measured pressure from the measured temperature using REFPROP software). The obtained evaporation temperature is the outlet superheat, and the target temperature is 5℃ (i.e., the preset second target temperature value); the opening of EXV2 (i.e., the first large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the WCC outlet pressure (the collected signal is PT4 pressure) (i.e., the first WCC outlet pressure value); the opening of EXV3 (i.e., the second large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the low pressure (the collected signal is PT3 pressure) (i.e., the fourth low pressure value). Each actuator is adjusted according to Table 14, which is the preset ultra-low temperature crew cabin heating component adjustment table.

[0029] Table 14 Specifically, in battery heating mode (ultra-low temperature hot gas bypass) (i.e., ultra-low temperature battery heating mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the fifth WCC outlet water temperature value), with a target temperature of 35℃ (i.e., the preset fifth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the opening of EXV2 (i.e., the first large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the WCC outlet pressure (the acquired signal is PT4 pressure) (i.e., the second WCC outlet pressure value); the opening of EXV3 (i.e., the second large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the low pressure (the acquired signal is PT3 pressure) (i.e., the fifth low pressure value). Each actuator is adjusted according to Table 15, which is the preset ultra-low temperature battery heating component adjustment table.

[0030] Table 15 It should be understood that in dual heating mode (ultra-low temperature hot gas bypass) (i.e., ultra-low temperature dual heating mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the sixth WCC outlet water temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software based on the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); EXV2 (i.e., the first large-diameter electronic expansion valve)... The opening of the valve is controlled by PI plus feedforward to control the WCC outlet pressure (the acquired signal is PT4 pressure) (i.e., the third WCC outlet pressure value); the opening of EXV3 (i.e., the second large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the low pressure (the acquired signal is PT3 pressure) (i.e., the sixth low pressure value); the three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (the acquired signal is T2) (i.e., the third battery inlet water temperature value), and the target temperature is 30-40℃ (any value within the range is acceptable) (i.e., the preset second target temperature range) (the flow of the two branches is controlled by PWM). Each actuator is adjusted according to Table 16, which is the preset ultra-low temperature dual heating component adjustment table.

[0031] Table 16 In the above embodiments, the thermal management components are controlled according to the heating mode, refrigerant pressure data, and refrigerant water circuit temperature data, which solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability, and poor coordination of actuator actions in the existing R290 refrigerant automotive thermal management system. It meets the needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0032] Optionally, as an embodiment of the present invention, the refrigerant water circuit temperature data further includes the seventh WCC outlet water temperature value, the eighth WCC outlet water temperature value and the ninth WCC outlet water temperature value obtained from the T1 measuring point, the fourth battery inlet water temperature value obtained from the T2 measuring point, and the first motor waste heat temperature value, the second motor waste heat temperature value and the third motor waste heat temperature value obtained from the T5 measuring point. The refrigerant pressure data also includes the tenth, eleventh, and twelfth refrigerant pressure values ​​obtained by the HPT high-pressure pressure sensor from the PT1 measuring point; In the thermal management controller, the process of controlling the thermal management component based on the waste heat recovery heating combination mode and the refrigerant water circuit temperature data includes: If the waste heat recovery heating combination mode is the waste heat recovery crew cabin heating combination mode, then the speed control of the electric compressor is performed by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the seventh WCC to the preset fourth target temperature value. The tenth refrigerant pressure value was calculated using the REFPROP tool to obtain the tenth evaporation temperature value; The difference between the seventh WCC outlet water temperature value and the tenth evaporation temperature value is calculated to obtain the tenth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the tenth battery cooler to the preset second target temperature value. The first three-way valve mode is obtained from the third three-way valve; The seventh fan speed adjustment data is obtained from the preset waste heat recovery crew compartment heating combination fan adjustment table based on the first motor waste heat temperature value and the first three-way valve mode, and the LTR low temperature radiator is adjusted according to the seventh fan speed adjustment data. According to the preset adjustment table for the waste heat recovery crew cabin heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the waste heat recovery heating combination mode is the waste heat recovery battery heating combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the eighth WCC outlet water temperature value to the preset fifth target temperature value. The eleventh refrigerant pressure value was calculated using the REFPROP tool to obtain the eleventh evaporation temperature value; The difference between the water outlet temperature of the eighth WCC and the eleventh evaporation temperature is calculated to obtain the superheated temperature of the eleventh battery cooler outlet. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the eleventh battery cooler outlet to the preset second target temperature value. The second three-way valve mode is obtained from the third three-way valve; The eighth fan speed adjustment data is obtained from the preset waste heat recovery battery heating combination fan adjustment table based on the waste heat temperature value of the second motor and the mode of the second three-way valve, and the LTR low temperature heat sink is adjusted according to the eighth fan speed adjustment data. According to the preset adjustment table for the waste heat recovery battery heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the waste heat recovery heating combination mode is a waste heat recovery dual heating combination mode, then the speed control of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature value of the ninth WCC to the preset fourth target temperature value. The pressure value of the twelfth refrigerant was calculated using the REFPROP tool to obtain the twelfth evaporation temperature value; The difference between the outlet water temperature of the ninth WCC and the twelfth evaporation temperature is calculated to obtain the superheated temperature of the twelfth battery cooler outlet. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the twelfth battery cooler to the preset second target temperature value. Obtain the third three-way valve mode from the third three-way valve; The ninth fan speed adjustment data is obtained from the preset waste heat recovery dual heating combination fan adjustment table based on the waste heat temperature value of the third motor and the third three-way valve mode, and the LTR low temperature heat sink is adjusted according to the ninth fan speed adjustment data. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the inlet water temperature of the fourth battery to the preset second target temperature range; According to the preset adjustment table for the dual heating combination components for waste heat recovery, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively.

[0033] Specifically, in the motor waste heat recovery + passenger compartment heating mode (i.e., waste heat recovery passenger compartment heating combination mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the seventh WCC outlet water temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the EXV1 (i.e., small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat), with a target temperature of 5℃; the three-way valve 3 mode (i.e., the first three-way valve mode) and LTR fan speed control are shown in Table 17 (acquired signal T5) (i.e., the first motor waste heat temperature value), and each actuator is adjusted according to Table 18. Table 17 is the preset waste heat recovery passenger compartment heating combination fan adjustment table, and Table 18 is the preset waste heat recovery passenger compartment heating combination component adjustment table.

[0034] Table 17 Table 18 It should be understood that in the motor waste heat recovery + battery heating mode (i.e., waste heat recovery and battery heating combination mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the eighth WCC outlet water temperature value), with a target temperature of 35℃ (i.e., the preset fifth target temperature value); the EXV1 (i.e., small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat), with a target temperature of 5℃ (i.e., the preset second target temperature value); the three-way valve 3 mode (i.e., the second three-way valve mode) and LTR fan speed control are shown in Table 19 (acquired signal T5) (i.e., the second motor waste heat temperature value), and each actuator is adjusted according to Table 20. Table 19 is the preset waste heat recovery and battery heating combination fan adjustment table, and Table 20 is the preset waste heat recovery and battery heating combination component adjustment table.

[0035] Table 19 Table 20 Specifically, in the motor waste heat recovery + dual heating mode (i.e., waste heat recovery dual heating combination mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T1 temperature) (i.e., the ninth WCC outlet water temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the EXV1 (i.e., small-diameter electronic expansion valve) opening is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software based on the measured pressure is the outlet superheat), with a target temperature of 5℃ (i.e., the preset second target). Temperature value); Three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (acquisition signal is T2) (i.e., the fourth battery inlet water temperature value), the target temperature is 30-40℃ (any value within the range can be selected) (i.e., the preset second target temperature range) (the flow of the two branches is controlled by PWM); Three-way valve 3 mode (i.e., the third three-way valve mode) and LTR fan speed control are shown in Table 21 (acquisition signal T5) (i.e., the third motor waste heat temperature value), each actuator is adjusted according to Table 22, Table 21 is the preset waste heat recovery dual heating combination fan adjustment table, Table 22 is the preset waste heat recovery dual heating combination component adjustment table.

[0036] Table 21 Table 22 In the above embodiments, the thermal management components are controlled according to the waste heat recovery heating combination mode and the refrigerant water circuit temperature data, which solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability and poor coordination of the actions of the actuators in the existing R290 refrigerant vehicle thermal management system.

[0037] Optionally, as an embodiment of the present invention, the refrigerant water circuit temperature data further includes the water temperature values ​​of the fourth motor, the fifth motor, and the sixth motor, the water temperature values ​​of the fourth and fifth battery coolers obtained from the T1 measuring point, the water temperature values ​​of the fifth and sixth batteries obtained from the T2 measuring point, and the waste heat temperature value of the fourth motor obtained from the T5 measuring point. The refrigerant pressure data also includes the fourth, fifth, and sixth air conditioning pressure values ​​obtained from the HPT high-pressure pressure sensor, as well as the thirteenth, fourteenth, and fifteenth refrigerant pressure values ​​obtained from the PT1 measuring point by the HPT high-pressure pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the dehumidification mode and the refrigerant water circuit temperature data includes: If the dehumidification mode is a cooling dehumidification mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the fourth battery cooler to the preset first target temperature value. The thirteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the thirteenth evaporation temperature value; The difference between the outlet water temperature of the fourth battery cooler and the thirteenth evaporation temperature is calculated to obtain the outlet superheat temperature of the thirteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the thirteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The tenth fan speed adjustment data is obtained from the preset cooling and dehumidifying fan adjustment table based on the fourth motor water temperature value and the fourth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the tenth fan speed adjustment data; According to the preset adjustment table for refrigeration and dehumidification components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the dehumidification mode is a cooling and dehumidification battery cooling combination mode, the speed control of the electric compressor is performed using the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the fifth battery cooler to the preset first target temperature value. The fourteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the fourteenth evaporation temperature value; The difference between the outlet water temperature of the fifth battery cooler and the evaporation temperature of the fourteenth battery cooler is calculated to obtain the outlet superheat temperature of the fourteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fourteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the fifth battery to the preset first target temperature range; The eleventh fan speed adjustment data is obtained from the preset cooling and dehumidifying fan adjustment table based on the fifth motor water temperature value and the fifth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the eleventh fan speed adjustment data. According to the preset adjustment table for refrigeration and dehumidification components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively. If the dehumidification mode is a heating, dehumidification, and battery cooling combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the waste heat temperature value of the fourth motor to the preset fourth target temperature value. The fifteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the fifteenth evaporation temperature value; The difference between the waste heat temperature of the fourth motor and the evaporation temperature of the fifteenth motor is calculated to obtain the overheat temperature value of the outlet of the fifteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fifteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the sixth battery to the preset first target temperature range; The twelfth fan speed adjustment data is obtained from the preset heating and dehumidifying battery cooling combination fan adjustment table based on the sixth motor water temperature value and the sixth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the twelfth fan speed adjustment data; According to the preset adjustment table for the heating, dehumidification, and battery cooling assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively.

[0038] It should be understood that in the cooling and dehumidification mode, the compressor speed is controlled by PI plus feedforward to control the outlet water temperature of the chiller (the acquired signal is T1 temperature) (i.e., the outlet water temperature value of the fourth battery cooler), with a target temperature of 3℃ (i.e., the preset first target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the outlet superheat of the chiller (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the three-way proportional valve 1 (i.e., the first three-way valve) controls the air outlet temperature of the air conditioning unit through PWM (i.e., PWM control algorithm); the LTR fan speed is controlled in two levels, which must simultaneously meet the control table as shown in Table 22, and each actuator is adjusted according to Table 23. Table 22 is the preset cooling and dehumidification fan adjustment table, and Table 23 is the preset cooling and dehumidification component adjustment table.

[0039] Table 22 Table 23 Specifically, in the cooling / dehumidification + battery cooling mode (i.e., the heating / dehumidification battery cooling combination mode), the compressor speed is controlled by a PI controller with feedforward to regulate the chiller outlet water temperature (the acquired signal is T1 temperature) (i.e., the waste heat temperature value of the fourth motor), with a target temperature of 3℃ (i.e., the preset first target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by a PI controller with feedforward to regulate the chiller outlet superheat (the acquired signal is PT1 temperature and pressure; the measured temperature minus the evaporation temperature calculated using REFPROP software based on the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature). The three-way proportional valve 1 (i.e., the first three-way valve) controls the air outlet temperature of the air conditioning unit via PWM; the three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (the acquired signal is T2) (i.e., the sixth battery inlet water temperature value), with a target temperature of 15-25℃ (any value within the range is acceptable) (i.e., the preset first target temperature range) (the flow rate of the two branches is controlled via PWM); the LTR fan speed is controlled in two levels, which must simultaneously meet the control table as shown in Table 24, and each actuator is adjusted according to Table 25. Table 24 is the preset adjustment table for the heating, dehumidifying, and battery cooling combination fan, and Table 25 is the preset adjustment table for the heating, dehumidifying, and battery cooling combination components.

[0040] Table 24 Table 25 It should be understood that in the heating / dehumidification + battery cooling mode (i.e., the combined heating / dehumidification and battery cooling mode), the compressor speed is controlled by PI plus feedforward to regulate the temperature (the acquired signal is T5 temperature) (i.e., the waste heat temperature value of the fourth motor), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to regulate the chiller outlet superheat (the acquired signal is PT1 temperature and pressure; the measured temperature minus the evaporation temperature calculated using REFPROP software based on the measured pressure is the outlet temperature). The target temperature is 5℃ (i.e., the preset second target temperature value); the three-way proportional valve 1 (i.e., the first three-way valve) controls the air outlet temperature of the air conditioning unit via PWM; the three-way proportional valve 2 (i.e., the sixth three-way valve) controls the battery inlet water temperature (the acquired signal is T2) (i.e., the sixth battery inlet water temperature value), and the target temperature is 25℃ (any value within the range can be selected) (i.e., the preset first target temperature range) (the flow rate of the two branches is controlled by PWM). Each actuator is adjusted according to Table 26, which is the preset adjustment table for the heating, dehumidification, and battery cooling combination components.

[0041] Table 26 In the above embodiments, the thermal management components are controlled according to the dehumidification mode and refrigerant water circuit temperature data, which solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability and poor coordination of actuator actions in the existing R290 refrigerant automotive thermal management system.

[0042] Optionally, as an embodiment of the present invention, the refrigerant water circuit temperature data further includes the waste heat temperature values ​​of the fifth motor, the sixth motor, the seventh motor, and the eighth motor obtained from the T5 measuring point; The refrigerant pressure data also includes the sixteenth, seventeenth, eighteenth, and nineteenth refrigerant pressure values ​​obtained by the HPT high-pressure sensor from the PT1 measuring point, the fourth and fifth WCC outlet pressure values ​​obtained by the HPT high-pressure sensor from the PT4 measuring point, and the seventh and eighth low-pressure values ​​obtained by the LPT low-pressure sensor from the PT3 measuring point. In the thermal management controller, the process of controlling the thermal management component based on the defrosting mode and the refrigerant water circuit temperature data includes: If the defrosting mode is a heat pump defrosting mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the fifth motor to the preset fourth target temperature value. The sixteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the sixteenth evaporation temperature value; The difference between the outlet water temperature of the fourth battery cooler and the evaporation temperature of the sixteenth battery cooler is calculated to obtain the outlet superheat temperature of the sixteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the sixteenth battery cooler to the preset second target temperature value, and controlling the LTR low-temperature heat sink to close. According to the preset heat pump defrosting component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the defrosting mode is a heat pump defrosting and passenger compartment heating combination mode, then the speed control of the electric compressor is performed using the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the sixth motor to the preset fourth target temperature value. The seventeenth refrigerant pressure value was calculated using the REFPROP tool to obtain the seventeenth evaporation temperature value; The difference between the outlet water temperature of the sixth battery cooler and the evaporation temperature of the seventeenth battery cooler is calculated to obtain the outlet superheat temperature of the seventeenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the seventeenth battery cooler to the preset second target temperature value, and controlling the LTR low-temperature radiator to close. According to the preset adjustment table for the heat pump defrosting crew cabin heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the defrosting mode is the triangular cycle defrosting mode, the speed control of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the seventh motor to the preset fourth target temperature value. The pressure value of the eighteenth refrigerant was calculated using the REFPROP tool to obtain the eighteenth evaporation temperature value; The difference between the outlet water temperature of the seventh battery cooler and the evaporation temperature of the eighteenth battery cooler is calculated to obtain the outlet superheat temperature of the eighteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the eighteenth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the fourth WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The seventh low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm. Based on the optimization results, the opening degree of the second large-diameter electronic expansion valve is controlled, and the LTR low-temperature heat sink is controlled to close. According to the preset triangular circulation defrosting assembly adjustment table, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the defrosting mode is a triangular cycle defrosting crew cabin heating combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the waste heat temperature value of the eighth motor to the preset fourth target temperature value. The nineteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the nineteenth evaporation temperature value; The difference between the outlet water temperature of the eighth battery cooler and the evaporation temperature of the nineteenth battery cooler is calculated to obtain the outlet superheat temperature of the nineteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the nineteenth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the fifth WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The eighth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm. Based on the optimization results, the opening degree of the second large-diameter electronic expansion valve is controlled, and the LTR low-temperature heat sink is controlled to close. According to the preset adjustment table for the heat pump defrosting crew cabin heating assembly, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively.

[0043] It should be understood that in the heat pump defrosting mode (battery source heat pump) (i.e., heat pump defrosting mode), the compressor speed is controlled by PI plus feedforward to control the temperature (the acquired signal is T5 temperature) (i.e., the waste heat temperature value of the fifth motor), and the target temperature is 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the outlet superheat of the chiller (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software through the measured pressure is the outlet superheat), and the target temperature is 5℃ (i.e., the preset second target temperature value); the LTR (i.e., LTR low-temperature radiator) fan is turned off, and each actuator is adjusted according to Table 27, which is the preset heat pump defrosting component adjustment table.

[0044] Table 27 Specifically, in the heat pump defrosting + passenger compartment heating mode (battery source heat pump) (i.e., heat pump defrosting passenger compartment heating combination mode), the compressor speed is controlled by PI plus feedforward to control the temperature (the acquired signal is T5 temperature) (i.e., the waste heat temperature value of the sixth motor), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the outlet superheat of the chiller (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software through the measured pressure is the outlet superheat), with a target temperature of 5℃ (i.e., the preset second target temperature value); the LTR (i.e., LTR low-temperature radiator) fan is turned off, and each actuator is adjusted according to Table 28, which is the preset heat pump defrosting passenger compartment heating combination component adjustment table.

[0045] Table 28 It should be understood that in the triangular circulation defrosting mode, the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T5 temperature) (i.e., the seventh motor waste heat temperature value), with a target temperature of 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by REFPROP software using the measured pressure is the outlet superheat value), with a target temperature of 5℃ (i.e., the preset second target temperature value); the opening of EXV2 (i.e., the first large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the WCC outlet pressure (the acquired signal is PT4 pressure) (i.e., the fourth WCC outlet pressure value); the opening of EXV3 (i.e., the second large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the low pressure (the acquired signal is PT3 pressure) (i.e., the seventh low pressure value); the LTR (i.e., the LTR low-temperature radiator) fan is turned off, and each actuator is adjusted according to Table 29, which is the preset triangular circulation defrosting component adjustment table.

[0046] Table 29 Specifically, in the triangular circulation defrosting + passenger compartment heating mode (i.e., the triangular circulation defrosting and passenger compartment heating combination mode), the compressor speed is controlled by PI plus feedforward to control the WCC outlet water temperature (the acquired signal is T5 temperature) (i.e., the waste heat temperature value of the eighth motor), and the target temperature is 60℃ (i.e., the preset fourth target temperature value); the opening of EXV1 (i.e., the small-diameter electronic expansion valve) is controlled by PI plus feedforward to control the chiller outlet superheat (the acquired signal is PT1 temperature and pressure, and the measured temperature minus the evaporation temperature calculated by using REFPROP software based on the measured pressure is the outlet superheat). The target temperature is 5℃ (i.e., the preset second target temperature value); the opening of EXV2 (i.e., the first large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the WCC outlet pressure (the collected signal is PT4 pressure) (i.e., the fifth WCC outlet pressure value); the opening of EXV3 (i.e., the second large-diameter electronic expansion valve) is controlled by PI plus feedforward to control the low pressure (the collected signal is PT3 pressure) (i.e., the eighth low pressure value); the LTR (i.e., the LTR low-temperature radiator) fan is turned off, and each actuator is adjusted according to Table 30. Table 30 is the preset triangular circulation defrosting crew compartment heating assembly adjustment table.

[0047] Table 30 In the above embodiments, the thermal management components are controlled according to the defrosting mode and refrigerant water circuit temperature data, which solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability and poor coordination of actuator actions in the existing R290 refrigerant automotive thermal management system.

[0048] Alternatively, as another embodiment of the present invention, the present invention belongs to the field of thermal management and control technology of R290 novel refrigerant, and is applicable to scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0049] Alternatively, as another embodiment of the present invention, the present invention improves system adaptability, control accuracy and operational stability by accurately matching control targets, parameters and actions of each execution component under different scenarios.

[0050] Alternatively, as another embodiment of the present invention, the present invention solves the problems of poor working condition adaptability, insufficient control accuracy, weak operation stability, and poor coordination of actuator actions in the existing R290 refrigerant automotive thermal management system by finely dividing the system operation mode and designing a multi-parameter-multi-component collaborative control strategy, thereby meeting the application needs of multiple scenarios such as ultra-low temperature hot gas bypass, heat pump defrosting, and automotive waste heat recovery.

[0051] Optionally, as another embodiment of the present invention, the present invention includes a passenger cabin cooling mode, a battery cooling mode, a dual cooling mode, a passenger cabin heating mode, a battery heating mode, a dual heating mode, a passenger cabin heating mode (extremely low temperature hot gas bypass), a battery heating mode (extremely low temperature hot gas bypass), dual heating (extremely low temperature hot gas bypass), a battery motor passive cooling mode, a motor waste heat recovery + passenger cabin heating mode, a motor waste heat recovery + battery heating mode, a motor waste heat recovery + dual heating mode, a cooling dehumidification mode, a cooling dehumidification + battery cooling mode, a heating dehumidification + battery cooling mode, a heat pump defrosting mode (battery source heat pump), a heat pump defrosting + passenger cabin heating mode (battery source heat pump), a defrosting mode (motor source), a triangular circulation defrosting mode, and a triangular circulation defrosting + passenger cabin heating mode.

[0052] Figure 5 This is a schematic flowchart of an R290 refrigerant thermal management method provided in an embodiment of the present invention.

[0053] Alternatively, as another embodiment of the present invention, such as Figure 5 As shown, a thermal management method for R290 refrigerant includes the following steps: S1: Collect refrigerant pressure data from the thermal management components via a pressure sensor array; S2: Collect refrigerant water circuit temperature data from the thermal management component using a water temperature sensor; S3: Import refrigerant control instructions and generate a refrigerant control mode based on the refrigerant control instructions; S4: Control the thermal management component according to the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

[0054] Optionally, another embodiment of the present invention provides an R290 refrigerant thermal management system, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the R290 refrigerant thermal management method as described above. This system can be a computer or similar system.

[0055] Optionally, another embodiment of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the R290 refrigerant thermal management method as described above.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and unit can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0058] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0059] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0060] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0061] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. This is understood to mean that the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0062] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An R290 refrigerant thermal management system, characterized in that, include: Thermal management controller, pressure sensor group, water temperature sensor, and thermal management components. The thermal management controller is connected to the pressure sensor group, the water temperature sensor and the thermal management component respectively, and the thermal management component is connected to the pressure sensor group and the water temperature sensor respectively. The pressure sensor group is used to acquire refrigerant pressure data from the thermal management component; The water temperature sensor is used to collect refrigerant water circuit temperature data from the thermal management component; The thermal management controller is used to import refrigerant control commands and generate a refrigerant control mode based on the refrigerant control commands; The thermal management component is controlled based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

2. The R290 refrigerant thermal management system according to claim 1, characterized in that, The thermal management components include an electric compressor, an LTR cryogenic radiator, a water-cooled condenser, a liquid storage tank, a battery cooler, a motor and electronic control assembly, a power battery, a Heater cabin heating core, a Cooler cabin cooling core, a small-diameter electronic expansion valve, a first large-diameter electronic expansion valve, a second large-diameter electronic expansion valve, a first four-way valve, a second four-way valve, an HVAC water pump, a battery water pump, a motor water pump, an LTR water pump, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifth three-way valve, a sixth three-way valve, a first water tank, a second water tank, a first three-way pipe, a second three-way pipe, a third three-way pipe, a fourth three-way pipe, a fifth three-way pipe, a sixth three-way pipe, a seventh three-way pipe, an eighth three-way pipe, a ninth three-way pipe, and a thirteenth three-way pipe; The first port of the electric compressor is connected to the thermal management controller via a CAN bus. The first port of the LTR cryogenic radiator is connected to the thermal management controller via a PWM bus. The first port of the first four-way valve is connected to the thermal management controller via a LIN bus. The first port of the second four-way valve is connected to the thermal management controller via a LIN bus. The first port of the first three-way valve is connected to the thermal management controller via a LIN bus. The first port of the second three-way valve is connected to the thermal management controller via a LIN bus. The first port of the third three-way valve is connected to the thermal management controller via a LIN bus. The first port of the fourth three-way valve is connected to the thermal management controller via a LIN bus. The first port of the fifth three-way valve is connected to the thermal management controller via a LIN bus. The first port of the small-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus. The controller is connected as follows: the first port of the first large-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus; the first port of the second large-diameter electronic expansion valve is connected to the thermal management controller via a LIN bus; the first port of the HVAC water pump is connected to the thermal management controller via a PWM bus; the first port of the battery water pump is connected to the thermal management controller via a PWM bus; the first port of the motor water pump is connected to the thermal management controller via a LIN bus; the first port of the LTR water pump is connected to the thermal management controller via a LIN bus; the first port of the sixth three-way valve is connected to the thermal management controller via a hard wire; the pressure sensor group is connected to PT1, PT2, PT3, and PT4 measuring points respectively; and the water temperature sensor is connected to T1, T2, T3, T4, T5, and T6 measuring points respectively. The second port of the electric compressor is connected to the first port of the first three-way pipe. The third port of the electric compressor is connected to both the PT2 measuring point and the first port of the second three-way pipe. The second port of the first three-way pipe is connected to both the PT2 measuring point and the second port of the first large-diameter electronic expansion valve. The third port of the first large-diameter electronic expansion valve is connected to the second port of the second three-way pipe. The third port of the second three-way pipe is connected to the second port of the second large-diameter electronic expansion valve. The third port of the second large-diameter electronic expansion valve is connected to the second port of the water-cooled condenser. The third port of the water-cooled condenser is connected to both the PT4 measuring point and the first port of the liquid storage tank. One end of the liquid storage tank is connected to the second port of the small-diameter electronic expansion valve. The third port of the small-diameter electronic expansion valve is connected to the first port of the battery cooler. The second port of the battery cooler is connected to both the PT1 measuring point and the third port of the first three-way pipe. The fourth port of the water-cooled condenser is connected to the second port of the first four-way valve. The third port of the first four-way valve is connected to the third port of the battery cooler. The fourth port of the first four-way valve is connected to the first port of the third three-way pipe. The fifth port of the first four-way valve is connected to the second port of the battery water pump. The second port of the third three-way pipe is connected to the first port of the fourth three-way pipe. The third port of the third three-way pipe is connected to the second port of the motor-pump. The third port of the motor-pump is connected to the T4 measuring point and one end of the motor control assembly. The other end of the motor control assembly is connected to the second port of the fourth three-way pipe. The third port of the fourth three-way pipe is connected to the T5 measuring point and the second port of the first three-way valve. The third port of the first three-way valve is connected to the first port of the fifth three-way pipe. The fourth port of the first three-way valve is connected to the first port of the sixth three-way pipe. The second port of the sixth three-way pipe is connected to the second port of the second three-way valve. The third port of the sixth three-way pipe is connected to the first port of the seventh three-way pipe. The second port of the seventh three-way pipe is connected to the second port of the third three-way valve. The third port of the seventh three-way pipe is connected to the second port of the LTR low-temperature radiator and one end of the first kettle. The third port of the LTR low-temperature radiator is connected to the T6 measuring point and the third port of the third three-way valve. The fourth port of the third three-way valve is connected to the other end of the first kettle and the second port of the HVAC water pump. The third port of the HVAC water pump is connected to the second port of the second four-way valve. The third port of the second four-way valve is connected to the fifth port of the water-cooled condenser. The fourth port of the second four-way valve is connected to the fourth port of the battery cooler.The fifth port of the second four-way valve is connected to one end of the second kettle and the first port of the eighth three-way pipe. The second port of the eighth three-way pipe is connected to the first port of the ninth three-way pipe. The third port of the eighth three-way pipe is connected to the third port of the second three-way valve. The fourth port of the second three-way valve is connected to one end of the Heater cabin heating element. The other end of the Heater cabin heating element is connected to the second port of the fifth three-way pipe. The third port of the fifth three-way pipe is connected to the second port of the fourth three-way valve. The third port of the fourth three-way valve is connected to the T1 measuring point and the third port of the battery water pump. The fourth port of the fourth three-way valve is connected to the second port of the fifth three-way valve. The third port of the fifth three-way valve is connected to one end of the Cooler passenger compartment cooling core. The other end of the Cooler passenger compartment cooling core is connected to the second port of the ninth three-way pipe. The third port of the ninth three-way pipe is connected to the second port of the sixth three-way valve. The third port of the sixth three-way valve is connected to the first port of the thirteenth thirteenth pipe. The second port of the thirteenth thirteenth pipe is connected to the fourth port of the fifth three-way valve. The third port of the thirteenth thirteenth pipe is connected to the T2 measuring point and one end of the power battery. The other end of the power battery is connected to the T3 measuring point, the other end of the second water tank, and the second port of the LTR water pump. The third port of the LTR water pump is connected to the fourth port of the sixth three-way valve.

3. The R290 refrigerant thermal management system according to claim 2, characterized in that, The refrigerant control modes include cooling mode, heating mode, passive cooling mode, waste heat recovery heating combination mode, dehumidification mode, and defrosting mode. In the thermal management controller, the process of controlling the thermal management component based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: The thermal management component is controlled based on the cooling mode, the refrigerant pressure data, and the refrigerant water circuit temperature data. The thermal management component is controlled based on the heating mode, the refrigerant pressure data, and the refrigerant water circuit temperature data. If the refrigerant control mode is passive cooling mode, then the electric compressor, the small-diameter electronic expansion valve, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted according to the preset passive cooling component adjustment table. The thermal management component is controlled based on the waste heat recovery heating combination mode and the refrigerant water circuit temperature data; The thermal management component is controlled according to the dehumidification mode and the refrigerant water circuit temperature data; The thermal management component is controlled based on the defrosting mode and the refrigerant water circuit temperature data.

4. The R290 refrigerant thermal management system according to claim 3, characterized in that, The refrigerant water circuit temperature data includes the water temperature values ​​of the first motor, the second motor, and the third motor, the water temperature values ​​of the first battery cooler outlet, the second battery cooler outlet, and the third battery cooler outlet obtained from the T1 measuring point, and the water temperature value of the first battery inlet obtained from the T2 measuring point. The pressure sensor group includes an HPT high-pressure sensor, and the refrigerant pressure data includes a first air conditioning pressure value, a second air conditioning pressure value, and a third air conditioning pressure value obtained from the HPT high-pressure sensor, as well as a first refrigerant pressure value, a second refrigerant pressure value, and a third refrigerant pressure value obtained from the PT1 measuring point by the HPT high-pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the cooling mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: If the cooling mode is the crew cabin cooling mode, then the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, so as to adjust the outlet water temperature of the first battery cooler to the preset first target temperature value. The first refrigerant pressure value is calculated using the REFPROP tool to obtain the first evaporation temperature value; The difference between the outlet water temperature of the first battery cooler and the first evaporation temperature is calculated to obtain the outlet superheat temperature of the first battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the first battery cooler outlet to a preset second target temperature value. The first fan speed adjustment data is obtained from the preset passenger compartment cooling fan adjustment table based on the first motor water temperature value and the first air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the first fan speed adjustment data. According to the preset crew cabin cooling component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the cooling mode is battery cooling mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the second battery cooler to the preset third target temperature value. The second refrigerant pressure value is calculated using the REFPROP tool to obtain the second evaporation temperature value; The difference between the outlet water temperature of the second battery cooler and the second evaporation temperature is calculated to obtain the outlet superheat temperature of the second battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the second battery cooler outlet to the preset second target temperature value. The second fan speed adjustment data is obtained from the preset battery cooling fan adjustment table based on the second motor water temperature value and the second air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the second fan speed adjustment data; According to the preset battery cooling component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the cooling mode is a dual cooling mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the third battery cooler to the preset first target temperature value. The third refrigerant pressure value is calculated using the REFPROP tool to obtain the third evaporation temperature value; The difference between the outlet water temperature of the third battery cooler and the third evaporation temperature is calculated to obtain the outlet superheat temperature of the third battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the third battery cooler to the preset second target temperature value. The third fan speed adjustment data is obtained from the preset dual cooling fan adjustment table based on the third motor water temperature value and the third air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the third fan speed adjustment data; The sixth three-way valve is adjusted using a PWM control algorithm to bring the water temperature of the first battery into a preset first target temperature range. The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual-refrigeration component adjustment table.

5. The R290 refrigerant thermal management system according to claim 4, characterized in that, The refrigerant water circuit temperature data also includes the first WCC outlet water temperature value, the second WCC outlet water temperature value, the third WCC outlet water temperature value, the fourth WCC outlet water temperature value, the fifth WCC outlet water temperature value, and the sixth WCC outlet water temperature value obtained from the T1 measuring point, as well as the second battery inlet water temperature value and the third battery inlet water temperature value obtained from the T2 measuring point. The pressure sensor group also includes an LPT low-pressure sensor. The refrigerant pressure data also includes a first low-pressure value, a second low-pressure value, and a third low-pressure value obtained from the LPT low-pressure sensor; a fourth refrigerant pressure value, a fifth refrigerant pressure value, a sixth refrigerant pressure value, a seventh refrigerant pressure value, an eighth refrigerant pressure value, and a ninth refrigerant pressure value obtained from the PT1 measuring point by the HPT high-pressure sensor; a first WCC outlet pressure value, a second WCC outlet pressure value, and a third WCC outlet pressure value obtained from the PT4 measuring point by the HPT high-pressure sensor; and a fourth low-pressure value, a fifth low-pressure value, and a sixth low-pressure value obtained from the PT3 measuring point by the LPT low-pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the heating mode, the refrigerant pressure data, and the refrigerant water circuit temperature data includes: If the heating mode is the crew cabin heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the first WCC outlet water temperature value to the preset fourth target temperature value. The fourth refrigerant pressure value was calculated using the REFPROP tool to obtain the fourth evaporation temperature value; The difference between the first WCC outlet water temperature value and the fourth evaporation temperature value is calculated to obtain the fourth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the fourth battery cooler outlet to the preset second target temperature value. The fourth fan speed adjustment data is obtained from the preset crew compartment heating fan adjustment table based on the first low pressure value, and the LTR low temperature radiator is adjusted according to the fourth fan speed adjustment data. According to the preset crew cabin heating component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the heating mode is the battery heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the second WCC outlet water temperature value to the preset fifth target temperature value. The fifth refrigerant pressure value was calculated using the REFPROP tool to obtain the fifth evaporation temperature value; The difference between the second WCC outlet water temperature value and the fifth evaporation temperature value is calculated to obtain the fifth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fifth battery cooler to the preset second target temperature value. The fifth fan speed adjustment data is obtained from the preset battery heating fan adjustment table based on the second low pressure value, and the LTR low temperature heat sink is adjusted according to the fifth fan speed adjustment data; According to the preset battery heating component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the heating mode is a dual heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the third WCC outlet water temperature value to the preset fourth target temperature value. The sixth refrigerant pressure value was calculated using the REFPROP tool to obtain the sixth evaporation temperature value; The difference between the third WCC outlet water temperature value and the sixth evaporation temperature value is calculated to obtain the sixth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the sixth battery cooler to the preset second target temperature value. The sixth fan speed adjustment data is obtained from the preset dual heating fan adjustment table based on the third low pressure value, and the LTR low temperature heat sink is adjusted according to the sixth fan speed adjustment data. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the second battery to a preset second target temperature range; The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual heating component adjustment table. If the heating mode is the ultra-low temperature crew cabin heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the fourth WCC outlet water temperature value to the preset fourth target temperature value. The seventh refrigerant pressure value was calculated using the REFPROP tool to obtain the seventh evaporation temperature value; The difference between the fourth WCC outlet water temperature value and the seventh evaporation temperature value is calculated to obtain the seventh battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the seventh battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the first WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The fourth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. According to the preset adjustment table for the heating components of the cryogenic crew compartment, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the heating mode is the ultra-low temperature battery heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the fifth WCC outlet water temperature value to the preset fifth target temperature value. The eighth refrigerant pressure value was calculated using the REFPROP tool to obtain the eighth evaporation temperature value; The difference between the fifth WCC outlet water temperature value and the eighth evaporation temperature value is calculated to obtain the eighth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the eighth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the second WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The fifth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. According to the preset adjustment table for the ultra-low temperature battery heating components, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the heating mode is an extremely low temperature dual heating mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the sixth WCC to the preset fourth target temperature value. The ninth refrigerant pressure value was calculated using the REFPROP tool to obtain the ninth evaporation temperature value; The difference between the sixth WCC outlet water temperature value and the ninth evaporation temperature value is calculated to obtain the ninth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the ninth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the third WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The sixth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm, and the opening degree of the second large-diameter electronic expansion valve is controlled based on the optimization result. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the third battery to the preset second target temperature range; The first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted according to the preset dual heating component adjustment table.

6. The R290 refrigerant thermal management system according to claim 5, characterized in that, The refrigerant water circuit temperature data also includes the seventh WCC outlet water temperature value, the eighth WCC outlet water temperature value and the ninth WCC outlet water temperature value obtained from the T1 measuring point, the fourth battery inlet water temperature value obtained from the T2 measuring point, and the first motor waste heat temperature value, the second motor waste heat temperature value and the third motor waste heat temperature value obtained from the T5 measuring point. The refrigerant pressure data also includes the tenth, eleventh, and twelfth refrigerant pressure values ​​obtained by the HPT high-pressure pressure sensor from the PT1 measuring point; In the thermal management controller, the process of controlling the thermal management component based on the waste heat recovery heating combination mode and the refrigerant water circuit temperature data includes: If the waste heat recovery heating combination mode is the waste heat recovery crew cabin heating combination mode, then the speed control of the electric compressor is performed by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the seventh WCC to the preset fourth target temperature value. The tenth refrigerant pressure value was calculated using the REFPROP tool to obtain the tenth evaporation temperature value; The difference between the seventh WCC outlet water temperature value and the tenth evaporation temperature value is calculated to obtain the tenth battery cooler outlet superheat temperature value. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the tenth battery cooler to the preset second target temperature value. The first three-way valve mode is obtained from the third three-way valve; The seventh fan speed adjustment data is obtained from the preset waste heat recovery crew compartment heating combination fan adjustment table based on the first motor waste heat temperature value and the first three-way valve mode, and the LTR low temperature radiator is adjusted according to the seventh fan speed adjustment data. According to the preset adjustment table for the waste heat recovery crew cabin heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the waste heat recovery heating combination mode is the waste heat recovery battery heating combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the eighth WCC outlet water temperature value to the preset fifth target temperature value. The eleventh refrigerant pressure value was calculated using the REFPROP tool to obtain the eleventh evaporation temperature value; The difference between the water outlet temperature of the eighth WCC and the eleventh evaporation temperature is calculated to obtain the superheated temperature of the eleventh battery cooler outlet. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the eleventh battery cooler outlet to the preset second target temperature value. The second three-way valve mode is obtained from the third three-way valve; The eighth fan speed adjustment data is obtained from the preset waste heat recovery battery heating combination fan adjustment table based on the waste heat temperature value of the second motor and the mode of the second three-way valve, and the LTR low temperature heat sink is adjusted according to the eighth fan speed adjustment data. According to the preset adjustment table for the waste heat recovery battery heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the waste heat recovery heating combination mode is a waste heat recovery dual heating combination mode, then the speed control of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature value of the ninth WCC to the preset fourth target temperature value. The pressure value of the twelfth refrigerant was calculated using the REFPROP tool to obtain the twelfth evaporation temperature value; The difference between the outlet water temperature of the ninth WCC and the twelfth evaporation temperature is calculated to obtain the superheated temperature of the twelfth battery cooler outlet. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the twelfth battery cooler to the preset second target temperature value. Obtain the third three-way valve mode from the third three-way valve; The ninth fan speed adjustment data is obtained from the preset waste heat recovery dual heating combination fan adjustment table based on the waste heat temperature value of the third motor and the third three-way valve mode, and the LTR low temperature heat sink is adjusted according to the ninth fan speed adjustment data. The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the inlet water temperature of the fourth battery to the preset second target temperature range; According to the preset adjustment table for the dual heating combination components for waste heat recovery, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively.

7. The R290 refrigerant thermal management system according to claim 5, characterized in that, The refrigerant water circuit temperature data also includes the water temperature values ​​of the fourth motor, the fifth motor, and the sixth motor; the water temperature values ​​of the fourth and fifth battery coolers outlets obtained from the T1 measuring point; the water temperature values ​​of the fifth and sixth batteries inlet obtained from the T2 measuring point; and the waste heat temperature value of the fourth motor obtained from the T5 measuring point. The refrigerant pressure data also includes the fourth, fifth, and sixth air conditioning pressure values ​​obtained from the HPT high-pressure pressure sensor, as well as the thirteenth, fourteenth, and fifteenth refrigerant pressure values ​​obtained from the PT1 measuring point by the HPT high-pressure pressure sensor. In the thermal management controller, the process of controlling the thermal management component based on the dehumidification mode and the refrigerant water circuit temperature data includes: If the dehumidification mode is a cooling dehumidification mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the fourth battery cooler to the preset first target temperature value. The thirteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the thirteenth evaporation temperature value; The difference between the outlet water temperature of the fourth battery cooler and the thirteenth evaporation temperature is calculated to obtain the outlet superheat temperature of the thirteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the thirteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The tenth fan speed adjustment data is obtained from the preset cooling and dehumidifying fan adjustment table based on the fourth motor water temperature value and the fourth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the tenth fan speed adjustment data; According to the preset adjustment table for refrigeration and dehumidification components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the dehumidification mode is a cooling and dehumidification battery cooling combination mode, the speed control of the electric compressor is performed using the PI control algorithm and the feedforward control algorithm, thereby adjusting the outlet water temperature of the fifth battery cooler to the preset first target temperature value. The fourteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the fourteenth evaporation temperature value; The difference between the outlet water temperature of the fifth battery cooler and the evaporation temperature of the fourteenth battery cooler is calculated to obtain the outlet superheat temperature of the fourteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fourteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the fifth battery to the preset first target temperature range; The eleventh fan speed adjustment data is obtained from the preset cooling and dehumidifying fan adjustment table based on the fifth motor water temperature value and the fifth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the eleventh fan speed adjustment data. According to the preset adjustment table for refrigeration and dehumidification components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively. If the dehumidification mode is a heating, dehumidification, and battery cooling combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the waste heat temperature value of the fourth motor to the preset fourth target temperature value. The fifteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the fifteenth evaporation temperature value; The difference between the waste heat temperature of the fourth motor and the evaporation temperature of the fifteenth motor is calculated to obtain the overheating temperature of the fifteenth battery cooler outlet. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the fifteenth battery cooler to the preset second target temperature value. The first three-way valve is adjusted using the PWM control algorithm described above; The PWM control algorithm is used to adjust the sixth three-way valve, thereby adjusting the water inlet temperature of the sixth battery to the preset first target temperature range; The twelfth fan speed adjustment data is obtained from the preset heating and dehumidifying battery cooling combination fan adjustment table based on the sixth motor water temperature value and the sixth air conditioning pressure value, and the LTR low temperature radiator is adjusted according to the twelfth fan speed adjustment data; According to the preset adjustment table for the heating, dehumidification, and battery cooling assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, and the fifth three-way valve are adjusted respectively.

8. The R290 refrigerant thermal management system according to claim 5, characterized in that, The refrigerant water circuit temperature data also includes the waste heat temperature values ​​of the fifth motor, the sixth motor, the seventh motor, and the eighth motor obtained from the T5 measuring point. The refrigerant pressure data also includes the sixteenth, seventeenth, eighteenth, and nineteenth refrigerant pressure values ​​obtained by the HPT high-pressure sensor from the PT1 measuring point, the fourth and fifth WCC outlet pressure values ​​obtained by the HPT high-pressure sensor from the PT4 measuring point, and the seventh and eighth low-pressure values ​​obtained by the LPT low-pressure sensor from the PT3 measuring point. In the thermal management controller, the process of controlling the thermal management component based on the defrosting mode and the refrigerant water circuit temperature data includes: If the defrosting mode is a heat pump defrosting mode, the speed of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the fifth motor to the preset fourth target temperature value. The sixteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the sixteenth evaporation temperature value; The difference between the outlet water temperature of the fourth battery cooler and the evaporation temperature of the sixteenth battery cooler is calculated to obtain the outlet superheat temperature of the sixteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the sixteenth battery cooler to the preset second target temperature value, and controlling the LTR low-temperature heat sink to close. According to the preset heat pump defrosting component adjustment table, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively. If the defrosting mode is a heat pump defrosting and passenger compartment heating combination mode, then the speed control of the electric compressor is performed using the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the sixth motor to the preset fourth target temperature value. The seventeenth refrigerant pressure value was calculated using the REFPROP tool to obtain the seventeenth evaporation temperature value; The difference between the outlet water temperature of the sixth battery cooler and the evaporation temperature of the seventeenth battery cooler is calculated to obtain the outlet superheat temperature of the seventeenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the seventeenth battery cooler to the preset second target temperature value, and controlling the LTR low-temperature radiator to close. According to the preset adjustment table for the heat pump defrosting crew cabin heating assembly components, the first large-diameter electronic expansion valve, the second large-diameter electronic expansion valve, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the defrosting mode is the triangular cycle defrosting mode, the speed control of the electric compressor is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the waste heat temperature value of the seventh motor to the preset fourth target temperature value. The pressure value of the eighteenth refrigerant was calculated using the REFPROP tool to obtain the eighteenth evaporation temperature value; The difference between the outlet water temperature of the seventh battery cooler and the evaporation temperature of the eighteenth battery cooler is calculated to obtain the outlet superheat temperature of the eighteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the eighteenth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the fourth WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The seventh low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm. Based on the optimization results, the opening degree of the second large-diameter electronic expansion valve is controlled, and the LTR low-temperature heat sink is controlled to close. According to the preset triangular circulation defrosting assembly adjustment table, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively; If the defrosting mode is a triangular cycle defrosting crew cabin heating combination mode, then the PI control algorithm and the feedforward control algorithm are used to control the speed of the electric compressor, thereby adjusting the waste heat temperature value of the eighth motor to the preset fourth target temperature value. The nineteenth refrigerant pressure value was calculated using the REFPROP tool to obtain the nineteenth evaporation temperature value; The difference between the outlet water temperature of the eighth battery cooler and the evaporation temperature of the nineteenth battery cooler is calculated to obtain the outlet superheat temperature of the nineteenth battery cooler. The opening degree of the small-diameter electronic expansion valve is controlled by the PI control algorithm and the feedforward control algorithm, thereby adjusting the overheating temperature value of the outlet of the nineteenth battery cooler to the preset second target temperature value. The PI control algorithm and the feedforward control algorithm are used to optimize the outlet pressure value of the fifth WCC, and the opening degree of the first large-diameter electronic expansion valve is controlled according to the optimization result. The eighth low-pressure value is optimized using the PI control algorithm and the feedforward control algorithm. Based on the optimization results, the opening degree of the second large-diameter electronic expansion valve is controlled, and the LTR low-temperature heat sink is controlled to close. According to the preset adjustment table for the heat pump defrosting crew cabin heating assembly, the first four-way valve, the second four-way valve, the HVAC water pump, the battery water pump, the motor water pump, the LTR water pump, the second three-way valve, the third three-way valve, the fourth three-way valve, the fifth three-way valve, and the sixth three-way valve are adjusted respectively.

9. A thermal management method for R290 refrigerant, characterized in that, Includes the following steps: Refrigerant pressure data is acquired from the thermal management components using a pressure sensor array; The refrigerant water temperature data is collected from the thermal management component using a water temperature sensor; Import refrigerant control commands and generate a refrigerant control mode based on the refrigerant control commands; The thermal management component is controlled based on the refrigerant control mode, the refrigerant pressure data, and the refrigerant water circuit temperature data.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the R290 refrigerant thermal management method as described in claim 9 is implemented.

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