Vehicle thermal management method and device

Abstract

The invention relates to the technical field of vehicle thermal management, in particular to a vehicle thermal management method and device. Determining a thermal management control mode according to the whole vehicle state and the temperature parameter; and according to a target operation strategy corresponding to the heat management control mode, the operation state of parts in at least one loop of a battery pack water circulation loop, a motor electric control water circulation loop, an air conditioner refrigerant circulation loop, an electric auxiliary hot water circulation loop and an engine water circulation loop is controlled. Furthermore, a thermal management system integrated by a battery pack water circulation loop, a motor electric control water circulation loop, an air conditioner refrigerant circulation loop, an electric auxiliary hot water circulation loop and an engine water circulation loop can be controlled through thermal management control modes under different vehicle states and temperature parameters; temperature control over a cockpit, a battery pack and a motor of a vehicle is achieved, and the thermal management efficiency of the whole vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle thermal management, and in particular to a vehicle thermal management method and device. Background Art

[0002] Traditional hybrid commercial vehicles generally use multiple thermal management systems to manage the thermal performance of multiple different areas to achieve thermal management of the entire vehicle. However, with the development of new energy, vehicles often need to make real-time adjustments to the temperature of multiple vehicle areas such as the motor, battery, and cab. Due to their independent existence, traditional multiple thermal management systems have low efficiency in thermal management of the entire new energy vehicle.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle thermal management method and device, aiming to solve the technical problem in the prior art that the vehicle thermal management system has a low integration level, resulting in low thermal management efficiency.

[0005] To achieve the above object, the present invention provides a vehicle thermal management method, which is applied to a vehicle equipped with a thermal management system, wherein the vehicle comprises: a battery pack water circulation loop, a motor electronic control water circulation loop, an air conditioning refrigerant circulation loop, an electric auxiliary hot water circulation loop and an engine water circulation loop, wherein the battery pack water circulation loop is connected to the air conditioning refrigerant circulation loop through a refrigerant heat exchanger, the battery pack water circulation loop is connected to the electric auxiliary hot water circulation loop through a plate heat exchanger, the electric auxiliary hot water circulation loop is connected to the engine water circulation loop through a four-way valve, and the battery pack water circulation loop is connected to the air conditioning refrigerant circulation loop through a refrigerant heat exchanger. The circuit includes a battery, a battery water pump and a first expansion water tank, the motor electronically controlled water circulation circuit includes a first radiator, a second expansion water tank, a drive motor, an electric drive water pump and a motor controller, the air conditioning refrigerant circulation circuit includes a compressor, an electronic fan, an evaporator, a condenser, a thermal expansion valve, a refrigerant solenoid valve, an electronic expansion valve and a refrigerant heat exchanger, the electric auxiliary hot water circulation circuit includes an electric auxiliary heating device, a hot water pump, a three-way valve, a plate heat exchanger, a four-way valve and a water-heat heat exchanger, and the engine water circulation circuit includes an engine, an engine water pump, a third expansion water tank, a second radiator and a thermostat;

[0006] The method comprises the following steps:

[0007] Obtaining the vehicle status and temperature parameters of the vehicle;

[0008] Determining a thermal management control mode according to the vehicle state and the temperature parameter;

[0009] The operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit is controlled according to the target operating strategy corresponding to the thermal management control mode.

[0010] Optionally, the temperature parameter includes the motor electronic control temperature;

[0011] The control of the operating state of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit, and the engine water circulation circuit according to the target operation strategy corresponding to the thermal management control mode includes:

[0012] When the thermal management control mode is the motor electronic control cooling mode, the battery pack water pump, the hot water pump, the engine water pump, the compressor, the electronic fan, and the electric auxiliary heating device are turned off;

[0013] Control the refrigerant solenoid valve, the electronic expansion valve, the thermal expansion valve, the three-way valve and the four-way valve to cut off;

[0014] The electric water pump is turned on, and the speed of the electric water pump is adjusted according to the electric control temperature of the motor.

[0015] Optionally, the temperature parameter further includes: engine temperature;

[0016] The vehicle thermal management method further includes:

[0017] When the thermal management control mode is the engine cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the compressor, the electronic fan, and the electric auxiliary heating device are turned off;

[0018] Control the refrigerant solenoid valve, electronic expansion valve, thermal expansion valve and three-way valve to cut off, and open the four-way valve;

[0019] The engine water pump is turned on, and the speed of the engine water pump is adjusted according to the engine temperature.

[0020] Optionally, the temperature parameter also includes the temperature of the evaporator in the air-conditioning refrigerant circulation loop;

[0021] The vehicle thermal management method further includes:

[0022] When the thermal management control mode is the cab cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the electric auxiliary heating device and the engine water pump are turned off;

[0023] Control the electronic expansion valve, three-way valve and four-way valve to cut off, and open the refrigerant solenoid valve and thermal expansion valve;

[0024] The compressor and the electronic fan are turned on, and at least one of the speed of the engine water pump, the speed of the electronic fan, and the opening of the thermal expansion valve is adjusted according to the evaporator temperature and the evaporator pressure of the air-conditioning refrigerant circulation loop.

[0025] Optionally, the temperature parameter also includes the pipe temperature in the air-conditioning refrigerant circulation loop;

[0026] The vehicle thermal management method further includes:

[0027] When the thermal management control mode is the battery pack cooling mode, the electric drive water pump, the hot water pump, the electric auxiliary heating device, the engine water pump and the electronic fan are turned off;

[0028] Control the refrigerant solenoid valve, thermal expansion valve, three-way valve and four-way valve to cut off, and open the electronic expansion valve;

[0029] The battery pack water pump and the compressor are turned on, and at least one of the rotation speed of the compressor and the opening degree of the electronic expansion valve is adjusted according to the pipeline temperature and the pipeline pressure of the air-conditioning refrigerant circulation loop.

[0030] Optionally, the vehicle thermal management method further includes:

[0031] When the thermal management control mode is the dual-open cooling mode of the cab and the battery pack, the electric drive water pump, the hot water pump, the engine water pump, and the electric auxiliary heating device are turned off;

[0032] Open the refrigerant solenoid valve, the electronic expansion valve and the thermal expansion valve, and close the three-way valve and the four-way valve;

[0033] The battery pack water pump, the compressor and the electronic fan are turned on, and at least one of the speed of the compressor, the speed of the electronic fan, the opening of the electronic expansion valve and the opening of the thermal expansion valve is adjusted according to the pipe temperature in the refrigerant circulation loop.

[0034] Optionally, the temperature parameter also includes the pipe temperature of the electric auxiliary hot water circulation loop;

[0035] The vehicle thermal management method further includes:

[0036] When the thermal management control mode is the cab heating mode, the battery pack water pump, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off;

[0037] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0038] The hot water pump and the electric auxiliary heating device are turned on, and the operating states of the hot water pump, the electric auxiliary heating device, the three-way valve and the four-way valve are adjusted according to the pipe temperature of the electric auxiliary hot water circulation loop.

[0039] Optionally, the temperature parameters include the inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop;

[0040] The vehicle thermal management method further includes:

[0041] When the thermal management control mode is the battery pack heating mode, turning off the electric drive water pump, the engine water pump, the compressor and the electronic fan;

[0042] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0043] The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0044] Optionally, the vehicle thermal management method further includes:

[0045] When the thermal management control mode is a dual heating mode of the cab and the battery pack, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off;

[0046] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0047] The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0048] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle thermal management device, the vehicle thermal management device comprising:

[0049] An acquisition circuit is used to obtain the vehicle status and temperature parameters of the vehicle;

[0050] A determination loop, used to determine a thermal management control mode according to the vehicle state and the temperature parameter;

[0051] A control circuit, used to control the operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operating strategy corresponding to the thermal management control mode.

[0052] In addition, to achieve the above-mentioned objectives, the present invention also proposes a vehicle thermal management device, which includes: a memory, a processor, and a vehicle thermal management program stored in the memory and executable on the processor, wherein the vehicle thermal management program is configured to implement the steps of the vehicle thermal management method described above.

[0053] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a vehicle thermal management program is stored, and when the vehicle thermal management program is executed by a processor, the steps of the vehicle thermal management method described above are implemented.

[0054] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the vehicle thermal management method described above are implemented.

[0055] One or more technical solutions proposed in the present application have at least the following technical effects: the present application obtains the whole vehicle state and temperature parameters of the vehicle; determines the thermal management control mode according to the whole vehicle state and the temperature parameters; controls the operating state of the components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operation strategy corresponding to the thermal management control mode, and then the thermal management system integrating the proposed battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit can be controlled through the thermal management control modes under different whole vehicle states and temperature parameters, so as to realize the temperature control of the vehicle's cockpit, battery pack and motor, improve the thermal management efficiency of the whole vehicle, and avoid the technical problem of low vehicle thermal management efficiency of new energy vehicles in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0057] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0058] Figure 1 It is a schematic flow chart of a first embodiment of a vehicle thermal management method of the present invention;

[0059] Figure 2 A schematic diagram of a thermal management architecture of an embodiment of a vehicle thermal management method of the present invention;

[0060] Figure 3 A schematic diagram of an integrated thermal management system according to an embodiment of a vehicle thermal management method of the present invention;

[0061] Figure 4 A schematic diagram of a flow chart of a second embodiment of a vehicle thermal management method according to the present invention;

[0062] Figure 5 It is a structural block diagram of a first embodiment of a vehicle thermal management device of the present invention;

[0063] Figure 6 It is a structural schematic diagram of a vehicle thermal management device in a hardware operating environment involved in an embodiment of the present invention.

[0064] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0065] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0066] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0067] Based on this, an embodiment of the present invention provides a vehicle thermal management method, referring to Figure 1 , Figure 1 It is a schematic flow chart of a first embodiment of a vehicle thermal management method of the present invention.

[0068] In this embodiment, the vehicle thermal management method includes:

[0069] Step S10: Acquire the vehicle status and temperature parameters of the vehicle.

[0070] It should be noted that the executor of the method of this embodiment can be a device with functions such as data processing, data collection and program running, such as: an on-board computer or controller, etc., or other devices that can achieve the same or similar functions. This embodiment does not make specific restrictions on this. In this embodiment and subsequent embodiments, the on-board controller of a vehicle equipped with a thermal management system will be used as an example for explanation.

[0071] It should be noted that the reference Figure 2 , Figure 2: is a structural schematic diagram of the integrated thermal management system in this embodiment, which is divided into five functional modules, namely, a battery pack water circulation loop, a motor electronic control water circulation loop, an air-conditioning refrigerant circulation loop, an electric auxiliary hot water circulation loop and an engine water circulation loop. Among them, the loop battery pack water circulation loop is connected to the loop air-conditioning refrigerant circulation module through a refrigerant heat exchanger, the loop battery pack water circulation loop is connected to the loop electric auxiliary hot water circulation module through a plate heat exchanger, and the loop electric auxiliary hot water circulation module is connected to the engine water circulation module through a four-way valve.

[0072] Specifically, the battery pack water circulation loop includes a battery, a battery water pump and a first expansion water tank, the motor and electronically controlled water circulation loop includes a first radiator, a second expansion water tank, a drive motor, an electric drive water pump and a motor controller, the air conditioning refrigerant circulation module includes a compressor, an electronic fan, an evaporator, a condenser, a thermal expansion valve, a refrigerant solenoid valve, an electronic expansion valve and a refrigerant heat exchanger, the electric auxiliary hot water circulation loop includes an electric auxiliary heating device, a hot water pump, a three-way valve, a plate heat exchanger, a four-way valve and a water-to-water heat exchanger, and the engine water circulation loop includes an engine, an engine water pump, a third expansion water tank, a second radiator and a thermostat.

[0073] The battery pack water circulation module is specifically the blue pipeline, which realizes the heating of the battery pack through the battery water pump, in which the battery water pump realizes the water circulation; the expansion water tank realizes the exhaust and water replenishment of the water circuit; the temperature sensor T1 / T2 is used to monitor the inlet and outlet temperature of the battery pack; the air conditioning refrigerant circulation module is specifically the green management and black pipeline: the battery pack cooling (green pipeline) and the cab cooling (black pipeline) are realized through the air conditioning compressor, in which the refrigerant heat exchanger (refrigerant heat exchanger) is the place where the refrigerant and the battery circulating water are exchanged to realize the heat dissipation of the battery circulating water circuit; the electronic expansion valve (EXV) passes Through the opening adjustment, the battery cooling capacity is controlled and distributed; the PT sensor (upper) collects the pressure and temperature of the refrigerant at the outlet of the refrigerant heat exchanger; HVAC realizes the air supply and heat exchange in the cab; the electronic compressor controls the speed of the electric compressor based on the battery pack temperature, the air conditioning opening status in the cab and the HVAC evaporator temperature; the PT sensor (lower) collects the pressure and temperature of the refrigerant at the outlet of the electronic compressor; the condenser realizes the heat dissipation of the refrigerant; the pressure sensor P detects the outlet pressure of the condenser; the refrigerant solenoid valve cools the cab, cools the battery pack and the cab and the battery The package switches the cooling mode at the same time; the thermal expansion valve controls the refrigerant flow rate of the cab cooling pipeline; the electronic fan realizes heat dissipation and heat exchange; the motor and electronic control water circulation module is specifically the purple pipeline: the motor and electronic control are cooled by the electric drive water pump, and the radiator realizes heat dissipation; the expansion water tank realizes water exhaust and water replenishment in the water circuit; the electric drive water pump realizes water circulation in the water circuit; the engine water circulation module is specifically the red pipeline, and the engine water pump is used to cool the engine, and the thermostat is used to adjust the amount of water entering the radiator; the radiator realizes heat dissipation; the expansion water tank realizes water exhaust and water replenishment in the water circuit; the engine water pump realizes water circulation in the water circuit water circulation; the hydrothermal PTC water circulation module is specifically the orange pipeline, which realizes battery pack heating and cab heating through the hot water pump, wherein the heating exchange plate is the heat exchange place between the engine hot water and the battery circulating water, realizing the heating of the battery circulating water circuit; the hot water pump realizes the water circuit circulation; the three-way solenoid valve realizes the water circuit switching required for the cab heating and battery pack heating modes; the four-way solenoid valve realizes the interconnection and switching between the engine water circulation module and the hydrothermal PTC water circulation module; the hydrothermal PTC is used for the circulating water in the hot water circuit; the temperature sensor T3 is used to monitor the water temperature of the hydrothermal PTC water circulation module.

[0074] In this embodiment, the vehicle status includes the current vehicle BMS battery status, MCU motor status and vehicle fault status, etc. When determining the vehicle status, the integrated thermal management controller TMS can be used to judge according to the driver's operation of the vehicle high-voltage power-on driving, vehicle high-voltage power-on charging, air conditioning switch, PTC switch and other signals. Specifically, the specific structure of the integrated thermal management controller TMS is referenced Figure 3, among which, the controllers related to thermal management in the integrated thermal management controller include the vehicle controller VCU, the battery management system BMS, the motor controller MCU, the engine controller ECU, the instrument IC, and the all-in-one controller. The rest are the integrated thermal management controller TMS that collects signal states such as temperature, pressure, and liquid level, and thermal management control drives related electronic fans, cooling water pumps, air-conditioning compressors, various valves and other components; the integrated thermal management controller is TMS that receives the vehicle status of the vehicle controller VCU, the battery management system BMS, the motor controller MCU, and the engine controller ECU through CAN signals for the integrated thermal management working condition identification of the vehicle; the integrated thermal management controller is TMS that collects the temperatures of the air-conditioning pipeline, the battery pack outlet, the battery pack inlet, and the water circulation module through temperature sensors T, T1, T2, and T3 for the integrated thermal management function control of the vehicle; the integrated thermal management controller is TMS that collects the pressure and temperature of the refrigeration device to the compressor and the compressor to the condenser through two pressure and temperature sensors PT for the integrated thermal management function control of the vehicle; the integrated thermal management controller The controller is for TMS to collect the condenser outlet pressure through the pressure sensor P, which is used for the integrated thermal management fault diagnosis function control of the whole vehicle; the integrated thermal management controller is for TMS to collect the liquid level status of each expansion water tank through the liquid level switch, which is used for the integrated thermal management fault diagnosis function control of the whole vehicle; the integrated thermal management controller is for TMS to send the thermal management system function status signal to the instrument through the CAN signal for status display, and send the PTC relay closing request to the all-in-one controller for powering the PTC heater; according to the control strategy, the integrated thermal management controller is for TMS to control the PTC heater and the air-conditioning compressor to close and work through hard lines, and to control the air-conditioning compressor speed regulation by sending the compressor target speed through the CAN signal; the water pump enable PWM opening request is sent through the CAN signal to control the battery pack water pump, the electric drive water pump, the hot water pump, and the engine water pump to start working according to the preset opening value; according to the control strategy, the integrated thermal management controller is for TMS to send a control request through the CAN signal / LIN signal to control the three-way water valve, the four-way water valve, the electronic expansion valve, the refrigerant solenoid valve, and the thermal expansion valve to start working according to the preset value.

[0075] The vehicle's temperature parameters include but are not limited to: motor electronic control temperature, engine temperature, evaporator temperature in the air-conditioning refrigerant circulation loop, pipe temperature in the air-conditioning refrigerant circulation loop, pipe temperature in the electric auxiliary hot water circulation loop, and battery pack inlet and outlet temperatures.

[0076] Step S20: determining a thermal management control mode according to the vehicle state and the temperature parameters.

[0077] It can be understood that when determining the thermal management control mode based on the vehicle status and the temperature parameters of each area of ​​the vehicle, it is possible to first determine whether the vehicle is prohibited from turning on the thermal management system fault. If so, determine whether the vehicle status is driving or charging. Finally, determine whether the temperature parameters of each area are greater than the corresponding set values, and then determine the thermal management control mode of the vehicle. If the above conditions are not met, the vehicle enters the standby mode. When the vehicle enters the standby state, each valve, water pump, fan, and compressor can be controlled to reset to the initial default state.

[0078] Step S30: Control the operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operating strategy corresponding to the thermal management control mode.

[0079] Control the operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit, specifically controlling the operating status of the battery pack water pump, the electric drive water pump, the hot water pump, the engine water pump, the compressor, the electronic fan, the electric auxiliary heating device (PCT), the refrigerant solenoid valve, the electronic expansion valve, the thermal expansion valve, the three-way valve and the four-way valve.

[0080] This embodiment obtains the whole vehicle state and temperature parameters of the vehicle; determines the thermal management control mode according to the whole vehicle state and the temperature parameters; controls the operating state of the components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operation strategy corresponding to the thermal management control mode, and then can control the proposed thermal management system integrating the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit through the thermal management control modes under different whole vehicle states and temperature parameters, so as to achieve temperature control of the vehicle's cockpit, battery pack and motor, improve the thermal management efficiency of the whole vehicle, and avoid the technical problem of low whole vehicle thermal management efficiency of new energy vehicles in the prior art.

[0081] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 4 Before step S30, the vehicle thermal management method further includes:

[0082] Step S301: When the thermal management control mode is the motor electronic control cooling mode, turn off the battery pack water pump, hot water pump, engine water pump, compressor, electronic fan, and electric auxiliary heating device.

[0083] Step S302: Control the refrigerant solenoid valve, the electronic expansion valve, the thermal expansion valve, the three-way valve and the four-way valve to be cut off.

[0084] Step S303: Turn on the electric water pump and adjust the speed of the electric water pump according to the electric control temperature of the motor.

[0085] It should be noted that by turning on the electric drive water pump, the motor can be cooled down separately through the motor-controlled water circulation loop to achieve cooling of the motor. For other areas that do not require cooling, the corresponding battery pack water pump, hot water pump, engine water pump, compressor, electronic fan, electric auxiliary heating device, refrigerant solenoid valve, electronic expansion valve, thermal expansion valve, three-way valve and the four-way valve cut-off can all be closed or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0086] In the specific implementation, the integrated thermal management controller TMS sends the electric water pump enable PWM request signal through the CAN signal, thereby controlling the electric water pump to initialize according to the preset opening value, and then adjusts the speed or opening of the electric water pump in real time according to the motor electronic control temperature until the conditions for powering off or jumping to other modes are met.

[0087] Furthermore, the vehicle thermal management method further includes:

[0088] When the thermal management control mode is the engine cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the compressor, the electronic fan, and the electric auxiliary heating device are turned off;

[0089] Control the refrigerant solenoid valve, electronic expansion valve, thermal expansion valve and three-way valve to cut off, and open the second selection end and the third selection end of the four-way valve;

[0090] The engine water pump is turned on, and the speed of the engine water pump is adjusted according to the engine temperature.

[0091] It can be understood that by opening the engine water pump and the second and third selection ends of the four-way valve, the engine water circulation loop can be used to cool the engine alone to achieve engine cooling. For other areas that do not require cooling, the corresponding battery pack water pump, electric drive water pump, hot water pump, compressor, electronic fan, electric auxiliary heating device, refrigerant solenoid valve, electronic expansion valve, thermal expansion valve and three-way valve can all be closed or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0092] In the specific implementation, the integrated thermal management controller TMS sends the engine water pump enable PWM request signal through the CAN signal, thereby controlling the electric drive water pump to initialize according to the preset opening value, and controlling the second and third selection ends of the four-way valve to open the preset opening, and then adjusting the engine water pump speed or opening in real time according to the engine temperature, so that the engine is at a suitable temperature until the conditions for powering off or jumping to other modes are met.

[0093] Furthermore, the vehicle thermal management method further includes:

[0094] When the thermal management control mode is the cab cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the electric auxiliary heating device and the engine water pump are turned off;

[0095] Control the electronic expansion valve, three-way valve and four-way valve to cut off, and open the refrigerant solenoid valve and thermal expansion valve;

[0096] The compressor and the electronic fan are turned on, and at least one of the speed of the engine water pump, the speed of the electronic fan, and the opening of the thermal expansion valve is adjusted according to the evaporator temperature and the evaporator pressure of the air-conditioning refrigerant circulation loop.

[0097] It can be understood that the cooling of the cab is achieved by turning on the compressor, electronic fan, refrigerant solenoid valve and thermal expansion valve, and using the air-conditioning refrigerant circulation loop to cool the cab alone. For other areas that do not require cooling, the corresponding battery pack water pump, electric drive water pump, hot water pump, electric auxiliary heating device, engine water pump, electronic expansion valve, three-way valve and four-way valve can all be closed or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0098] In the specific implementation, the integrated thermal management controller TMS sends the electronic fan enable PWM request signal through the CAN signal, thereby controlling the electric drive water pump to initialize according to the preset opening value, and sends the compressor enable signal and the compressor target speed request, so that the compressor works at the preset speed, and controls the thermal expansion valve to open the preset opening, and then adjusts the engine water pump speed, the electronic fan speed and the opening of the thermal expansion valve in real time according to the evaporator temperature and evaporator pressure of the air-conditioning refrigerant circulation loop, so that the cab is at a suitable temperature until the conditions for powering off or jumping to other modes are met.

[0099] Furthermore, the vehicle thermal management method further includes:

[0100] When the thermal management control mode is the battery pack cooling mode, the electric drive water pump, the hot water pump, the electric auxiliary heating device, the engine water pump and the electronic fan are turned off;

[0101] Control the refrigerant solenoid valve, thermal expansion valve, three-way valve and four-way valve to cut off, and open the electronic expansion valve;

[0102] The battery pack water pump and the compressor are turned on, and at least one of the rotation speed of the compressor and the opening degree of the electronic expansion valve is adjusted according to the pipeline temperature and the pipeline pressure of the air-conditioning refrigerant circulation loop.

[0103] It can be understood that by turning on the battery pack water pump, compressor and electronic expansion valve, the battery pack is cooled by the air-conditioning refrigerant circulation loop and the battery pack water circulation loop to improve the cooling efficiency of the battery pack. For other areas that do not require cooling, the corresponding electric drive water pump, hot water pump, electric auxiliary heating device, engine water pump, electronic fan, refrigerant solenoid valve, thermal expansion valve, three-way valve and four-way valve can all be closed or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0104] In the specific implementation, the integrated thermal management controller TMS sends the battery pack water pump enable PWM request signal through the CAN signal, thereby controlling the battery pack water pump to initialize according to the preset opening value, and sends the compressor enable signal and the compressor target speed request, so that the compressor works at the preset speed, and controls the thermal expansion valve to open the preset opening, and then adjusts at least one of the compressor speed and the opening of the electronic expansion valve in real time according to the pipeline temperature and pipeline pressure of the air-conditioning refrigerant circulation loop, so that the battery pack maintains a suitable cooling efficiency until the conditions for powering off or jumping to other modes are met.

[0105] Furthermore, the vehicle thermal management method further includes:

[0106] When the thermal management control mode is the dual-open cooling mode of the cab and the battery pack, the electric drive water pump, the hot water pump, the engine water pump, and the electric auxiliary heating device are turned off;

[0107] Open the refrigerant solenoid valve, the electronic expansion valve and the thermal expansion valve, and close the three-way valve and the four-way valve;

[0108] The battery pack water pump, the compressor and the electronic fan are turned on, and at least one of the speed of the compressor, the speed of the electronic fan, the opening of the electronic expansion valve and the opening of the thermal expansion valve is adjusted according to the pipe temperature in the refrigerant circulation loop.

[0109] It can be understood that by turning on the battery pack water pump, the compressor electronic fan, the refrigerant solenoid valve, the electronic expansion valve and the thermal expansion valve, the battery pack and the cab are cooled respectively by the air-conditioning refrigerant circulation loop and the battery pack water circulation loop. For other areas that do not require cooling, the corresponding electric drive water pump, hot water pump, engine water pump, electric auxiliary heating device, three-way valve and the four-way valve can all be closed or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0110] In the specific implementation, the integrated thermal management controller TMS sends a battery pack water pump enable PWM request signal through a CAN signal, thereby controlling the battery pack water pump to initialize according to a preset opening value, sends an electronic fan enable PWM request signal, thereby controlling the electronic fan to initialize according to a preset speed, and sends a compressor enable signal and a compressor target speed request, so that the compressor works at a preset speed, and controls the thermal expansion valve to open a preset opening, and then adjusts at least one of the compressor speed and the opening of the electronic expansion valve in real time according to the pipeline temperature and pipeline pressure of the air-conditioning refrigerant circulation loop, so that the battery pack maintains a suitable cooling efficiency until the conditions for powering off or jumping to other modes are met.

[0111] Furthermore, the vehicle thermal management method further includes:

[0112] When the thermal management control mode is the cab heating mode, the battery pack water pump, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off;

[0113] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0114] The hot water pump and the electric auxiliary heating device are turned on, and the operating states of the hot water pump, the electric auxiliary heating device, the three-way valve and the four-way valve are adjusted according to the pipe temperature of the electric auxiliary hot water circulation loop.

[0115] It can be understood that the present embodiment can also increase the temperature of various areas in the vehicle by turning on the hot water pump, the electric auxiliary heating device, the refrigerant solenoid valve, the three-way valve and the four-way valve, so as to heat the cab with the air-conditioning refrigerant circulation loop and the electric auxiliary hot water circulation loop. For other areas that do not require heating, the corresponding battery pack water pump, electric drive water pump, engine water pump, compressor, electronic fan, electronic expansion valve and thermal expansion valve can all be turned off or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0116] In a specific implementation, the integrated thermal management controller TMS sends a battery pack water pump enable PWM request signal through a CAN signal, thereby controlling the battery pack water pump to initialize according to a preset opening value, and controlling the operation of the electric auxiliary heating device, so that the electric auxiliary heating heats the coolant in the water circulation loop, and the first selection end and the fourth selection end of the four-way valve are connected, and the first selection end and the third selection end of the three-way valve are connected, and then the pipe temperature of the electric auxiliary hot water circulation loop is adjusted in real time to control at least one of the operating states of the hot water pump, the electric auxiliary heating device, the three-way valve and the four-way valve, so that the battery pack maintains a suitable cooling efficiency until the conditions for powering off or jumping to other modes are met.

[0117] Furthermore, the vehicle thermal management method further includes:

[0118] When the thermal management control mode is the battery pack heating mode, turning off the electric drive water pump, the engine water pump, the compressor and the electronic fan;

[0119] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0120] The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0121] It can be understood that the present embodiment heats the battery pack with the electric auxiliary hot water circulation loop and the battery pack water circulation loop by turning on the battery pack water pump, the hot water pump, the electric auxiliary heating device, the refrigerant solenoid valve, the three-way valve and the four-way valve. For other areas that do not require heating, the corresponding electric drive water pump, engine water pump, compressor, electronic fan, electronic expansion valve and thermal expansion valve can be turned off or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0122] In the specific implementation, the integrated thermal management controller TMS sends a battery pack water pump enable PWM request signal through a CAN signal, thereby controlling the battery pack water pump to initialize according to a preset opening value, controlling the operation of the electric auxiliary heating device, so that the electric auxiliary heating heats the coolant in the water circulation loop, and then adjusts at least one of the compressor speed and the opening of the electronic expansion valve in real time according to the pipeline temperature and pipeline pressure of the air-conditioning refrigerant circulation loop, so that the battery pack maintains a suitable cooling efficiency until the conditions for powering off or jumping to other modes are met.

[0123] Furthermore, the vehicle thermal management method further includes:

[0124] When the thermal management control mode is a dual heating mode of the cab and the battery pack, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off;

[0125] Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve;

[0126] The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0127] It can be understood that the present embodiment heats the battery pack with the electric auxiliary hot water circulation loop and the battery pack water circulation loop by turning on the battery pack water pump, the hot water pump, the electric auxiliary heating device, the refrigerant solenoid valve, the three-way valve and the four-way valve. For other areas that do not require heating, the corresponding electric drive water pump, engine water pump, compressor, electronic fan, electronic expansion valve and thermal expansion valve can be turned off or kept closed, thereby reducing energy consumption and avoiding unnecessary consumption.

[0128] In the specific implementation, in the hybrid mode, the four-way water valves 2 and 3 are connected only when the engine is cooled; the four-way water valves 1 and 2 are connected, 3 and 4 are connected, and the three-way water valves 1 and 3 are connected when the engine is cooled + the cab is heated; the four-way water valves 1 and 2 are connected, 3 and 4 are connected, and the three-way water valves 1 and 2 are connected when the engine is cooled + the battery pack is heated; the four-way water valves 1 and 2 are connected, 3 and 4 are connected, and the three-way water valves 1 and 2 and 3 are connected when the engine is cooled + the battery pack is heated + the cab is heated. In the pure electric mode, the four-way water valves 1 and 4 are connected only when the cab is heated, and the three-way water valves 1 and 3 are connected; the four-way water valves 1 and 4 are connected only when the battery pack is heated, and the three-way water valves 1 and 2 are connected; the four-way water valves 1 and 4 are connected when the battery pack is heated + the cab is heated, and the three-way water valves 1 and 2 and 3 are connected, thereby realizing the normal operation of the above-mentioned various modes.

[0129] This embodiment realizes thermal management of the vehicle under different working conditions and states by controlling the operation of corresponding components or opening corresponding valves in different operating modes, thereby improving the efficiency of vehicle thermal management and the integration of thermal management modules in different areas.

[0130] This application also provides a vehicle thermal management device, please refer to Figure 5 , the vehicle thermal management device comprises:

[0131] The acquisition module 10 is used to acquire the vehicle status and temperature parameters of the vehicle.

[0132] The determination module 20 is used to determine the thermal management control mode according to the vehicle state and the temperature parameter.

[0133] The control module 30 is used to control the operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operating strategy corresponding to the thermal management control mode.

[0134] In one embodiment, the control module 30 is also used to shut down the battery pack water pump, hot water pump, engine water pump, compressor, electronic fan, and electric auxiliary heating device when the thermal management control mode is the motor electronic control cooling mode; control the refrigerant solenoid valve, electronic expansion valve, thermal expansion valve, three-way valve, and the four-way valve to be cut off; start the electric drive water pump and adjust the speed of the electric drive water pump according to the motor electronic control temperature.

[0135] In one embodiment, the control module 30 is also used to shut down the battery pack water pump, electric drive water pump, hot water pump, compressor, electronic fan, and electric auxiliary heating device when the thermal management control mode is the engine cooling mode; control the refrigerant solenoid valve, electronic expansion valve, thermal expansion valve, and three-way valve to be cut off, and open the four-way valve; start the engine water pump, and adjust the speed of the engine water pump according to the engine temperature.

[0136] In one embodiment, the control module 30 is also used to, when the thermal management control mode is the cab cooling mode, shut down the battery pack water pump, the electric drive water pump, the hot water pump, the electric auxiliary heating device and the engine water pump; control the electronic expansion valve, the three-way valve and the four-way valve to be cut off, and open the refrigerant solenoid valve and the thermal expansion valve; start the compressor and the electronic fan, and adjust at least one of the speed of the engine water pump, the speed of the electronic fan and the opening of the thermal expansion valve according to the evaporator temperature and the evaporator pressure of the air-conditioning refrigerant circulation loop.

[0137] In one embodiment, the control module 30 is further used to, when the thermal management control mode is the battery pack cooling mode, shut down the electric drive water pump, the hot water pump, the electric auxiliary heating device, the engine water pump and the electronic fan; control the refrigerant solenoid valve, the thermal expansion valve, the three-way valve and the four-way valve to be cut off, and open the electronic expansion valve; start the battery pack water pump and the compressor, and adjust at least one of the speed of the compressor and the opening of the electronic expansion valve according to the pipeline temperature and the pipeline pressure of the air-conditioning refrigerant circulation loop.

[0138] In one embodiment, the control module 30 is also used to turn off the electric drive water pump, the hot water pump, the engine water pump, and the electric auxiliary heating device when the thermal management control mode is the dual-open cooling mode of the cab and the battery pack; turn on the refrigerant solenoid valve, the electronic expansion valve, and the thermal expansion valve, and close the three-way valve and the four-way valve; turn on the battery pack water pump, the compressor, and the electronic fan, and adjust at least one of the speed of the compressor, the speed of the electronic fan, the opening of the electronic expansion valve, and the opening of the thermal expansion valve according to the pipeline temperature in the refrigerant circulation loop.

[0139] In one embodiment, the control module 30 is further used to, when the thermal management control mode is the cab heating mode, shut down the battery pack water pump, the electric drive water pump, the engine water pump, the compressor and the electronic fan; shut down the electronic expansion valve and the thermal expansion valve, and open the refrigerant solenoid valve, the three-way valve and the four-way valve; start the hot water pump and the electric auxiliary heating device, and adjust the operating status of the hot water pump, the electric auxiliary heating device, the three-way valve and the four-way valve according to the pipe temperature of the electric auxiliary hot water circulation loop.

[0140] In one embodiment, the control module 30 is further used to, when the thermal management control mode is the battery pack heating mode, shut down the electric drive water pump, the engine water pump, the compressor and the electronic fan; shut down the electronic expansion valve and the thermal expansion valve, and open the refrigerant solenoid valve, the three-way valve and the four-way valve; start the battery pack water pump, the hot water pump and the electric auxiliary heating device, and adjust at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve according to the inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0141] In one embodiment, the control module 30 is further used to, when the thermal management control mode is the dual-open heating mode of the cab and the battery pack, shut down the electric drive water pump, the engine water pump, the compressor and the electronic fan; shut down the electronic expansion valve and the thermal expansion valve, and open the refrigerant solenoid valve, the three-way valve and the four-way valve; turn on the battery pack water pump, the hot water pump and the electric auxiliary heating device, and adjust at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve according to the inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

[0142] This embodiment obtains the whole vehicle state and temperature parameters of the vehicle; determines the thermal management control mode according to the whole vehicle state and the temperature parameters; controls the operating state of the components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operation strategy corresponding to the thermal management control mode, and then can control the proposed thermal management system integrating the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit through the thermal management control modes under different whole vehicle states and temperature parameters, so as to achieve temperature control of the vehicle's cockpit, battery pack and motor, improve the thermal management efficiency of the whole vehicle, and avoid the technical problem of low whole vehicle thermal management efficiency of new energy vehicles in the prior art.

[0143] The present application provides a vehicle thermal management device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle thermal management method in the above-mentioned embodiment one.

[0144] Reference below Figure 6 , which shows a schematic diagram of the structure of a vehicle thermal management device suitable for implementing an embodiment of the present application. The vehicle thermal management device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The vehicle thermal management device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0145] like Figure 6 As shown, the vehicle thermal management device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle thermal management device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle thermal management device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle thermal management device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0146] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0147] The vehicle thermal management device provided by the present application adopts the vehicle thermal management method in the above embodiment, which can solve the technical problem of vehicle thermal management. Compared with the prior art, the beneficial effects of the vehicle thermal management device provided by the present application are the same as the beneficial effects of the vehicle thermal management method provided by the above embodiment, and the other technical features in the vehicle thermal management device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0148] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0149] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0150] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle thermal management method in the above-mentioned embodiment.

[0151] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0152] The computer-readable storage medium may be included in the vehicle thermal management device; or may exist independently without being assembled into the vehicle thermal management device.

[0153] The computer-readable storage medium carries one or more programs, and the computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, and the programming language includes an object-oriented programming language, such as Java, Smalltalk, C++, and a conventional procedural programming language, such as "C" language or a similar programming language. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0154] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0155] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0156] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle thermal management method, and can solve the technical problems of vehicle thermal management. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the vehicle thermal management method provided in the above-mentioned embodiment, and will not be repeated here.

[0157] The present application also provides a computer program product, including a computer program, which implements the steps of the vehicle thermal management method as described above when executed by a processor.

[0158] The computer program product provided by the present application can solve the technical problem of vehicle thermal management. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the vehicle thermal management method provided by the above embodiment, which will not be repeated here.

[0159] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle thermal management method, characterized in that: The vehicle thermal management method is applied to a vehicle equipped with a thermal management system, the vehicle comprising: a battery pack water circulation loop, a motor electronic control water circulation loop, an air conditioning refrigerant circulation loop, an electric auxiliary hot water circulation loop and an engine water circulation loop, the battery pack water circulation loop is connected to the air conditioning refrigerant circulation loop through a refrigerant heat exchanger, the battery pack water circulation loop is connected to the electric auxiliary hot water circulation loop through a plate heat exchanger, the electric auxiliary hot water circulation loop is connected to the engine water circulation loop through a four-way valve, the battery pack water circulation loop comprises a battery, a battery water pump and The first expansion water tank, the motor-controlled water circulation loop includes a first radiator, a second expansion water tank, a drive motor, an electric drive water pump and a motor controller, the air conditioning refrigerant circulation loop includes a compressor, an electronic fan, an evaporator, a condenser, a thermal expansion valve, a refrigerant solenoid valve, an electronic expansion valve and a refrigerant heat exchanger, the electric auxiliary hot water circulation loop includes an electric auxiliary heating device, a hot water pump, a three-way valve, a plate heat exchanger, a four-way valve and a water-heat heat exchanger, and the engine water circulation loop includes an engine, an engine water pump, a third expansion water tank, a second radiator and a thermostat; The vehicle thermal management method comprises: Obtaining the vehicle status and temperature parameters of the vehicle; Determining a thermal management control mode according to the vehicle state and the temperature parameter; The operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit is controlled according to the target operating strategy corresponding to the thermal management control mode.

2. The vehicle thermal management method according to claim 1, characterized in that: The temperature parameters include the motor electronic control temperature; The control of the operating state of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit, and the engine water circulation circuit according to the target operation strategy corresponding to the thermal management control mode includes: When the thermal management control mode is the motor electronic control cooling mode, the battery pack water pump, the hot water pump, the engine water pump, the compressor, the electronic fan, and the electric auxiliary heating device are turned off; Control the refrigerant solenoid valve, the electronic expansion valve, the thermal expansion valve, the three-way valve and the four-way valve to cut off; The electric water pump is turned on, and the speed of the electric water pump is adjusted according to the electric control temperature of the motor.

3. The vehicle thermal management method according to claim 2, characterized in that: The temperature parameters also include: engine temperature; The vehicle thermal management method further includes: When the thermal management control mode is the engine cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the compressor, the electronic fan, and the electric auxiliary heating device are turned off; Control the refrigerant solenoid valve, electronic expansion valve, thermal expansion valve and three-way valve to cut off, and open the four-way valve; The engine water pump is turned on, and the speed of the engine water pump is adjusted according to the engine temperature.

4. The vehicle thermal management method according to claim 3, characterized in that: The temperature parameters also include the temperature of the evaporator in the air conditioning refrigerant circulation loop; The vehicle thermal management method further includes: When the thermal management control mode is the cab cooling mode, the battery pack water pump, the electric drive water pump, the hot water pump, the electric auxiliary heating device and the engine water pump are turned off; Control the electronic expansion valve, three-way valve and four-way valve to cut off, and open the refrigerant solenoid valve and thermal expansion valve; The compressor and the electronic fan are turned on, and at least one of the speed of the engine water pump, the speed of the electronic fan, and the opening of the thermal expansion valve is adjusted according to the evaporator temperature and the evaporator pressure of the air-conditioning refrigerant circulation loop.

5. The vehicle thermal management method according to claim 4, characterized in that: The temperature parameters also include the pipe temperature in the air conditioning refrigerant circulation loop; The vehicle thermal management method further includes: When the thermal management control mode is the battery pack cooling mode, the electric drive water pump, the hot water pump, the electric auxiliary heating device, the engine water pump and the electronic fan are turned off; Control the refrigerant solenoid valve, thermal expansion valve, three-way valve and four-way valve to cut off, and open the electronic expansion valve; The battery pack water pump and the compressor are turned on, and at least one of the rotation speed of the compressor and the opening degree of the electronic expansion valve is adjusted according to the pipeline temperature and the pipeline pressure of the air-conditioning refrigerant circulation loop.

6. The vehicle thermal management method according to claim 5, characterized in that: The vehicle thermal management method further includes: When the thermal management control mode is the dual-open cooling mode of the cab and the battery pack, the electric drive water pump, the hot water pump, the engine water pump, and the electric auxiliary heating device are turned off; Open the refrigerant solenoid valve, the electronic expansion valve and the thermal expansion valve, and close the three-way valve and the four-way valve; The battery pack water pump, the compressor and the electronic fan are turned on, and at least one of the speed of the compressor, the speed of the electronic fan, the opening of the electronic expansion valve and the opening of the thermal expansion valve is adjusted according to the pipe temperature in the refrigerant circulation loop.

7. The vehicle thermal management method according to claim 1, characterized in that: The temperature parameters also include the pipe temperature of the electric auxiliary hot water circulation loop; The vehicle thermal management method further includes: When the thermal management control mode is the cab heating mode, the battery pack water pump, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off; Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve; The hot water pump and the electric auxiliary heating device are turned on, and the operating states of the hot water pump, the electric auxiliary heating device, the three-way valve and the four-way valve are adjusted according to the pipe temperature of the electric auxiliary hot water circulation loop.

8. The vehicle thermal management method according to claim 7, characterized in that: The temperature parameters include the inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop; The vehicle thermal management method further includes: When the thermal management control mode is the battery pack heating mode, turning off the electric drive water pump, the engine water pump, the compressor and the electronic fan; Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve; The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

9. The vehicle thermal management method according to claim 8, characterized in that: The vehicle thermal management method further includes: When the thermal management control mode is a dual heating mode of the cab and the battery pack, the electric drive water pump, the engine water pump, the compressor and the electronic fan are turned off; Close the electronic expansion valve and thermal expansion valve, and open the refrigerant solenoid valve, three-way valve and four-way valve; The battery pack water pump, the hot water pump and the electric auxiliary heating device are turned on, and at least one of the operating states of the battery pack water pump, the electric auxiliary heating device, the three-way valve and the four-way valve is adjusted according to the water inlet and outlet temperatures of the battery pack and the pipe temperature of the electric auxiliary hot water circulation loop.

10. A vehicle thermal management device, characterized in that: The vehicle thermal management device comprises: An acquisition circuit is used to obtain the vehicle status and temperature parameters of the vehicle; A determination loop, used to determine a thermal management control mode according to the vehicle state and the temperature parameter; A control circuit, used to control the operating status of components in at least one of the battery pack water circulation circuit, the motor electronic control water circulation circuit, the air conditioning refrigerant circulation circuit, the electric auxiliary hot water circulation circuit and the engine water circulation circuit according to the target operating strategy corresponding to the thermal management control mode.

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