Vehicle and vehicle thermal management method and device

Abstract

The invention relates to the technical field of vehicle heat management, in particular to a vehicle and a vehicle heat management method and device.The method comprises the steps that temperature parameters of all devices in the vehicle and the environment temperature of the area where the vehicle is located are obtained; determining a target operation mode of the vehicle according to the temperature parameter and / or the environment temperature; according to the control strategy corresponding to the target operation mode, the operation state of at least one of cab heat management equipment, battery heat management equipment and motor heat management equipment is adjusted until the temperature reaching shutdown condition corresponding to the target operation mode is met, the thermal management operation mode of the vehicle is determined by combining the temperature parameters of all devices in the vehicle with the environment temperature of the area where the vehicle is located, and therefore the operation state of at least one of cab thermal management equipment, battery thermal management equipment and motor thermal management equipment is correspondingly adjusted according to the target thermal management operation mode of the vehicle. Thermal management of a cockpit, a battery and a motor in the vehicle is achieved.

Description

Technical Field

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

[0002] In traditional technology, the vehicle's thermal management system mainly heats the cab and battery pack through a built-in air-conditioning system or electric heating. However, with the development of new energy, vehicles often need to independently adjust the temperature of the motor and battery in real time. The traditional thermal management system has low efficiency for the thermal management of new energy vehicles.

[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, a vehicle thermal management method and a device, aiming to solve the technical problem of low vehicle thermal management efficiency of new energy vehicles in the prior art.

[0005] To achieve the above object, the present invention provides a vehicle, the vehicle comprising a cab thermal management device, a battery thermal management device and a motor thermal management device, the cab thermal management device and the battery thermal management device are connected via a refrigerant heat exchanger, the cab thermal management device and the battery thermal management device are connected via a water-cooled heat exchanger, and the battery thermal management device and the motor thermal management device are connected via a four-way valve;

[0006] The cab thermal management device includes a heat pump system, the heat pump system includes a heat pump internal unit and a heat pump external unit, the heat pump internal unit includes an internal unit heat exchanger, a blower, a first electric auxiliary heating device, a one-way valve and a refrigerant heat exchanger, and the heat pump external unit includes a compressor, a water-cooled heat exchanger, a plurality of solenoid valves, an external unit heat exchanger and a fan;

[0007] The battery thermal management device comprises: a battery pack, a first expansion water tank, a first water pump and a refrigerant heat exchanger;

[0008] The motor thermal management device includes a second water pump, a second electric auxiliary heating device, a second expansion water tank, a motor radiator, a three-way valve, a four-way valve, a motor and a motor control unit;

[0009] The flow path between the first selection end of the three-way valve, the motor radiator and the motor forms a first motor heat exchange flow path;

[0010] The flow path between the second selection end of the three-way valve, the water side flow path of the water-cooled heat exchanger, the second electric auxiliary heating device and the motor forms a second motor heat exchange flow path

[0011] Optionally, a first solenoid valve is provided between the exhaust port of the compressor and the refrigerant side inlet of the water-cooled heat exchanger, a second solenoid valve is provided between the exhaust port of the compressor and the one-way valve, a third solenoid valve is provided between the intake port of the compressor and the water-cooled heat exchanger, a fourth solenoid valve is provided between the intake port of the compressor and the indoor heat exchanger, a fifth solenoid valve is provided between the one-way valve and the second port of the refrigerant heat exchanger, and a sixth solenoid valve is provided between the indoor heat exchanger and the second port of the refrigerant heat exchanger.

[0012] Optionally, a first electronic expansion valve is provided between the one-way valve and the external heat exchanger, a second electronic expansion valve is provided between the first electronic expansion valve and the first port of the refrigerant heat exchanger, and a third electronic expansion valve is provided between the external heat exchanger and the internal heat exchanger.

[0013] In addition, to achieve the above object, the present invention also proposes a vehicle thermal management method, which is applied to the above vehicle and includes the following steps:

[0014] Obtaining temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located;

[0015] determining a target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature;

[0016] The operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device is adjusted according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

[0017] Optionally, the temperature parameters include at least: motor temperature, electric control temperature, and maximum battery temperature and minimum battery temperature within a preset time;

[0018] The step of adjusting the operating state of at least one of a cab thermal management device, a battery thermal management device, and a motor thermal management device according to a control strategy corresponding to the target operating mode includes:

[0019] When the target operating mode is the heat dissipation mode, the connectivity status of the three-way valve and the four-way valve, and the operating status of at least one of the first water pump, the second water pump and the fan are adjusted according to the motor temperature, the electronic control temperature, the maximum battery temperature and the minimum battery temperature to reduce the temperature of the motor or the battery pack.

[0020] Optionally, the temperature parameter also includes: motor water temperature;

[0021] The vehicle thermal management method further includes:

[0022] When the target operating mode is a cooling mode, obtaining a cooling switch state of a cab thermal management device;

[0023] According to the maximum temperature of the battery, the water temperature of the motor, the refrigeration switch state and the ambient temperature, the conduction state of at least one of the first solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the first electronic expansion valve, the four-way valve and the second electronic expansion valve is adjusted, and at least one of the compressor, the fan and the first water pump is started to reduce the temperature of the cab and / or the battery pack;

[0024] The opening degree of the first electronic expansion valve is determined according to the outlet superheat degree of the indoor heat exchanger, and the opening degree of the second electronic expansion valve is determined according to the outlet superheat degree of the refrigerant heat exchanger.

[0025] Optionally, the adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device, and the motor thermal management device according to the control strategy corresponding to the target operating mode further includes:

[0026] When the target operating mode is a heating mode, obtaining a heating switch state of a cab thermal management device;

[0027] The first electric auxiliary heating device, the second water pump, the fan, the compressor, the blower and at least one of the second electric auxiliary heating device are started according to the ambient temperature, the battery temperature, the motor temperature, the coolant temperature and the heating switch state, and the conduction state of at least one of the four-way valve, the three-way valve, the second solenoid valve, the third solenoid valve, the fifth solenoid valve, the second electronic expansion valve and the third electronic expansion valve is adjusted to increase the temperature of the cab or the battery pack.

[0028] Optionally, the adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device, and the motor thermal management device according to the control strategy corresponding to the target operating mode further includes:

[0029] When the target operating mode is a mixed mode of cab heating and battery cooling, obtaining a heating switch state of a cab thermal management device;

[0030] When the heating switch is turned on and the battery temperature is greater than a first temperature threshold, the compressor, the fan, the first water pump and the first electric auxiliary heating device are started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the sixth solenoid valve, the four-way valve and the second electronic expansion valve are adjusted to increase the temperature of the cab or reduce the temperature of the battery pack;

[0031] The opening degree of the second electronic expansion valve is determined according to the superheat degree of the refrigerant side outlet of the water-cooled heat exchanger.

[0032] Optionally, the vehicle thermal management method further includes:

[0033] Get the coil temperature of the outdoor heat exchanger;

[0034] When the coil temperature is less than the second temperature threshold, the compressor is started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the third electronic expansion valve are adjusted.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle thermal management device, the vehicle thermal management device comprising:

[0036] An acquisition module, used to acquire temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located;

[0037] a determination module, configured to determine a target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature;

[0038] The adjustment module is used to adjust the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] One or more technical solutions proposed in the present application have at least the following technical effects: the present application structurally sets a cab thermal management device, a battery thermal management device and a motor thermal management device to control the temperature of the cab, the battery and the motor respectively, and based on the above-mentioned thermal management devices, the present embodiment proposes a vehicle thermal management method, by obtaining the temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located; determining the target operation mode of the vehicle according to the temperature parameters and / or the ambient temperature; adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operation mode until the temperature-reaching shutdown condition corresponding to the target operation mode is met, and the thermal management operation mode of the vehicle is determined by combining the temperature parameters of each device in the vehicle with the ambient temperature of the area where the vehicle is located, so as to adjust the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the target thermal management operation mode of the vehicle, so as to achieve thermal management of the cab, the battery and the motor in the 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

[0043] 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.

[0044] 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.

[0045] Figure 1 A schematic diagram of a thermal management architecture of an embodiment of a vehicle thermal management method of the present invention;

[0046] Figure 2 It is a schematic flow chart of a first embodiment of a vehicle thermal management method of the present invention;

[0047] Figure 3 A schematic diagram of a flow chart of a second embodiment of a vehicle thermal management method according to the present invention;

[0048] Figure 4 A schematic diagram of a circuit for self-circulation operation in a heat dissipation mode of an embodiment of a vehicle thermal management method of the present invention;

[0049] Figure 5 A schematic diagram of a circuit for the electronically controlled heat dissipation of a motor in a heat dissipation mode according to an embodiment of a vehicle thermal management method of the present invention;

[0050] Figure 6 A schematic diagram of a circuit for heat dissipation of a battery in a heat dissipation mode according to an embodiment of a vehicle thermal management method of the present invention;

[0051] Figure 7 A schematic diagram of a circuit for cooling a single cab in cooling mode according to an embodiment of a vehicle thermal management method of the present invention;

[0052] Figure 8 A schematic diagram of a circuit for cooling a battery pack in a cooling mode according to an embodiment of a vehicle thermal management method of the present invention;

[0053] Fig. 9 A schematic diagram of a circuit for cooling the cab and the battery pack in cooling mode according to an embodiment of a vehicle thermal management method of the present invention;

[0054] Fig.10 A schematic diagram of a circuit for heating a single cab in a heating mode according to an embodiment of a vehicle thermal management method of the present invention;

[0055] Fig.11 A schematic diagram of a second circuit for heating a single cab in a heating mode according to an embodiment of a vehicle thermal management method of the present invention;

[0056] Fig.12 A schematic diagram of a third circuit for heating a single cab in a heating mode according to an embodiment of a vehicle thermal management method of the present invention;

[0057] Fig.13 A schematic diagram of a first circuit for battery heating in a heating mode of an embodiment of a vehicle thermal management method of the present invention;

[0058] Fig.14 A schematic diagram of a second circuit for battery heating in a heating mode of an embodiment of a vehicle thermal management method of the present invention;

[0059] Fig.15 A schematic diagram of a first circuit for heating the cab and the battery in a heating mode in an embodiment of a vehicle thermal management method of the present invention;

[0060] Fig.16 A schematic diagram of a second circuit for heating the cab and the battery in the heating mode of an embodiment of the vehicle thermal management method of the present invention;

[0061] Fig.17 A schematic diagram of a circuit for driving cabin heating and battery cooling according to an embodiment of a vehicle thermal management method of the present invention;

[0062] Fig.18 A circuit diagram of defrosting operation according to an embodiment of a vehicle thermal management method of the present invention;

[0063] Fig.19It is a structural block diagram of a first embodiment of a vehicle thermal management device of the present invention;

[0064] Fig. 20 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.

[0065] Description of Figure Numbers:

[0066]

[0067]

[0068] 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

[0069] 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.

[0070] Based on this, an embodiment of the present invention provides a vehicle, referring to Figure 1 The vehicle is equipped with a cab thermal management device, a battery thermal management device and a motor thermal management device, which are used to perform thermal management on the cab, the battery and the motor respectively. The cab thermal management device and the battery thermal management device are connected via a refrigerant heat exchanger, the cab thermal management device and the battery thermal management device are connected via a water-cooled heat exchanger, and the battery thermal management device and the motor thermal management device are connected via a four-way valve.

[0071] The cab thermal management equipment includes a heat pump system, which includes a heat pump indoor unit and a heat pump outdoor unit. The heat pump indoor unit includes an indoor unit heat exchanger, a blower, a first electric auxiliary heating device, a one-way valve and a refrigerant heat exchanger, and the heat pump outdoor unit includes a compressor, a water-cooled heat exchanger, multiple solenoid valves, an outdoor unit heat exchanger and a fan; the battery thermal management equipment includes: a battery pack, a first expansion water tank, a first water pump and a refrigerant heat exchanger; the motor thermal management equipment includes a second water pump, a second electric auxiliary heating device, a second expansion water tank, a motor radiator, a three-way valve, a four-way valve, a motor and a motor control unit; the first selection end of the three-way valve, the motor radiator and the flow path between the motor form a first motor heat exchange flow path; the second selection end of the three-way valve, the water side flow path of the water-cooled heat exchanger, the second electric auxiliary heating device and the flow path between the motor form a second motor heat exchange flow path.

[0072] In addition, a first solenoid valve is provided between the exhaust port of the compressor and the refrigerant side inlet of the water-cooled heat exchanger, a second solenoid valve is provided between the exhaust port of the compressor and the one-way valve, a third solenoid valve is provided between the suction port of the compressor and the water-cooled heat exchanger, a fourth solenoid valve is provided between the suction port of the compressor and the indoor heat exchanger, a fifth solenoid valve is provided between the one-way valve and the second port of the refrigerant heat exchanger, and a sixth solenoid valve is provided between the indoor heat exchanger and the second port of the refrigerant heat exchanger.

[0073] A first electronic expansion valve is arranged between the one-way valve and the outdoor heat exchanger, a second electronic expansion valve is arranged between the first electronic expansion valve and the first port of the refrigerant heat exchanger, and a third electronic expansion valve is arranged between the outdoor heat exchanger and the indoor heat exchanger.

[0074] In a specific implementation, in order to independently realize thermal management of the cab, motor and battery, in this embodiment, the conduction state of the four-way valve, the three-way valve, each electronic expansion valve and each solenoid valve can be controlled so that independent control of the cab, battery or motor can be realized under different working conditions. The working conditions of the vehicle include but are not limited to: charging, idling, parking, etc., and this embodiment does not impose specific restrictions on this.

[0075] Based on this, an embodiment of the present invention provides a vehicle thermal management method, referring to Figure 2 , Figure 2 It is a schematic flow chart of a first embodiment of a vehicle thermal management method of the present invention.

[0076] In this embodiment, the vehicle thermal management method includes the following steps:

[0077] Step S10: Acquire the temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located.

[0078] 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: a vehicle-mounted computer or controller, etc., or other devices that can achieve the same or similar functions. This embodiment does not impose specific restrictions on this. In this embodiment and subsequent embodiments, the vehicle-mounted controller will be used as an example for explanation.

[0079] Temperature parameters include but are not limited to: battery temperature, motor temperature, electronic control temperature, water temperature, motor water temperature, coolant temperature and coil temperature of the heat exchanger in the vehicle, wherein the battery temperature includes the maximum battery temperature and the minimum battery temperature within a preset time period, and the water temperature includes the motor cooling water temperature, the pipeline water temperature, etc. In order to improve the vehicle's motor thermal management efficiency and the temperature control effect of combining air conditioning and battery thermal management, the pipeline water temperature in this embodiment can be the water temperature of the pipeline between the first water pump 121 and the three-way valve 125.

[0080] The above temperature parameters and the ambient temperature of the area where the vehicle is located can be measured by temperature sensors set at corresponding positions, and can also be measured by temperature sensing bags and other temperature acquisition devices that can realize temperature measurement. This embodiment does not make specific restrictions on this.

[0081] Step S20: determining a target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature.

[0082] It should be noted that when determining the target operating mode of the vehicle, at least one of the above-mentioned temperature parameters and the ambient temperature can be used for determination. For example, when the vehicle is in a charging or idling condition, and its motor temperature is greater than or equal to 55°C and / or the electronic control temperature is greater than or equal to 38°C, the target operating mode of the vehicle may be a motor and electronic control cooling mode; if the temperature difference between the maximum battery temperature and the minimum battery temperature of the vehicle is greater than or equal to 8°C, the self-circulation cooling mode is started, etc. This embodiment does not impose specific restrictions on this.

[0083] Step S30: adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

[0084] It should be understood that the control strategies corresponding to different target operating modes can control the on / off of each solenoid valve, electronic expansion valve, three-way valve 125 and four-way valve in the thermal management pipeline to form different temperature control loops, thereby controlling the temperature of the cockpit, motor 127 and battery. Since the judgment conditions of different target operating modes are different, in order to avoid excessive or insufficient temperature and reduce the energy consumption of thermal management, the control strategy corresponding to the target operating mode in this embodiment adjusts at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device. When the vehicle is in the operating state, the temperature-reaching shutdown condition in the operating mode can be used as the termination condition. There are differences in the temperature-reaching shutdown conditions corresponding to different target operating modes. For example, when the vehicle is in the condition of charging or idling, the temperature of the motor 127 is greater than or equal to 55°C and / or the electronic control temperature is greater than or equal to 38°C, the target operating mode of the vehicle can be the motor 127 electronic control cooling mode, and the temperature-reaching shutdown condition is any one of the motor 127 temperature <55°C, the electronic control temperature <38°C or the battery temperature >36°C. This embodiment is only for illustration and no specific limitation is made.

[0085] This embodiment obtains the temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located; determines the target operating mode of the vehicle according to the temperature parameters and / or the ambient temperature; adjusts the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met, and determines the thermal management operating mode of the vehicle through the temperature parameters of each device in the vehicle in combination with the ambient temperature of the area where the vehicle is located, thereby adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the target thermal management operating mode of the vehicle, thereby achieving thermal management of the cockpit, battery and motor in the vehicle, and avoiding the technical problem of low vehicle thermal management efficiency of new energy vehicles in the prior art.

[0086] 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 3 , step S30, comprising:

[0087] Step S301: When the target operating mode is the heat dissipation mode, the connectivity status of the three-way valve and the four-way valve, and the operating status of at least one of the first water pump, the second water pump and the fan are adjusted according to the motor temperature, the electronic control temperature, the maximum battery temperature and the minimum battery temperature to reduce the temperature of the motor or the battery pack.

[0088] It should be noted that, taking into account the cooling / heating of the cab, the cooling / heating of the battery pack, and the cooling demand of the motor only, there are different coupling modes under the different cooling and heating demands of each subsystem. For example, the battery and the motor need to be cooled at the same time, and each subsystem exchanges heat through its coupled heat exchanger. The specific working mode can be further subdivided. For example, when the vehicle is in the heat dissipation mode, the present embodiment subdivides the heat dissipation mode into three sub-modes, namely, the self-circulation model, the motor electronic control heat dissipation mode, and the battery heat dissipation mode. Among them, the entry conditions of the three sub-modes can be determined according to the motor temperature, the electronic control temperature, the motor water temperature, and the statistics of the maximum battery temperature and the minimum battery temperature within the preset time.

[0089] Specifically, the self-circulation mode is due to the large temperature difference of the battery, but no heat exchanger is turned on, and the second water pump is turned on according to demand to reduce the temperature difference between the battery cells by the circulation of the coolant. The motor and electronic control heat dissipation mode is due to the high temperature of the motor and the electronic control. Therefore, the second water pump and the fan in the motor cooling circuit are used to take away the motor heat through the circulation flow, and then the heat is discharged to the outside through the motor 127 circuit radiator. In the battery heat dissipation mode, due to the high battery temperature, the battery and motor cooling circuits are connected through the four-way valve, the fan and the second water pump are turned on, the coolant circulation is connected, and the heat is dissipated to the battery through the motor circuit radiator.

[0090] In the specific implementation, refer to Figure 4 , 5 , 6, Figure 4 , 5 , The dotted part in 6 corresponds to the working circuit under different heat dissipation modes. Correspondingly, in the self-circulation mode, due to the large temperature difference of the battery, the water pump is turned on to accelerate the circulation of the coolant and reduce the temperature difference between the battery cells. That is, when the maximum temperature of the battery - the minimum temperature of the battery ≥ 8 ° C, the first water pump is controlled to work, and the four-way valves 1 and 3 are connected until the maximum temperature of the battery - the minimum temperature of the battery < 5 ° C; under the heat dissipation of the motor and the electronic control, due to the high temperature of the motor and the electronic control, the heat is dissipated through the circulation of the coolant and the fan to prevent the motor temperature from being too high and affecting the life of the motor. The corresponding opening conditions are motor temperature ≥ 55 ° C or electronic control temperature ≥ 38 ℃; the execution action is that the second water pump works, the four-way valves 2 and 4 are connected, the fan is started, and the three-way valves 1 and 2 are connected, until the motor temperature is <55℃ or the electronic control temperature is <38℃; in the battery heat dissipation mode, since the battery temperature is slightly high, the heat can be dissipated through the combined action of the coolant and the fan, and there is no need to cool the compressor to cool it down. The corresponding start condition is 40℃>the maximum battery temperature ≥35℃, and the execution action is that the second water pump works, the four-way valves 2 and 4 are connected, the fan is started, the three-way valves 1 and 2 are connected, and the four-way valves 1 and 3 are connected, until the maximum battery temperature is <32℃ or the motor water temperature is >35℃, then exit this mode.

[0091] Furthermore, step S30 further includes:

[0092] When the target operating mode is a cooling mode, obtaining a cooling switch state of a cab thermal management device;

[0093] According to the maximum temperature of the battery, the water temperature of the motor, the refrigeration switch state and the ambient temperature, the conduction state of at least one of the first solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the first electronic expansion valve, the four-way valve and the second electronic expansion valve is adjusted, and at least one of the compressor, the fan and the first water pump is started to reduce the temperature of the cab and / or the battery pack;

[0094] The opening degree of the first electronic expansion valve is determined according to the outlet superheat degree of the indoor heat exchanger, and the opening degree of the second electronic expansion valve is determined according to the outlet superheat degree of the refrigerant heat exchanger.

[0095] It should be noted that the present embodiment subdivides the cooling mode into three modes: single cab cooling, single battery cooling, and cab and battery cooling. In the single cab cooling, when the air conditioner is turned on for cooling but the battery has no cooling or heating demand, the high-temperature and high-pressure refrigerant releases heat through the outdoor heat exchanger 118, and then changes to a low-temperature and low-pressure state through the electronic expansion valve, and absorbs heat from the indoor evaporator 111 to achieve the cooling function. The single battery cooling means that when the air conditioner is turned off and the battery has a cooling demand, the high-temperature and high-pressure refrigerant releases heat through the outdoor heat exchanger 118, and then changes to a low-temperature and low-pressure state through the electronic expansion valve. state, absorbing the heat of the battery coolant from the refrigerant heat exchanger 115, so that the coolant cools the battery; the common cooling of the cab and the battery means that when the air conditioner is turned on for cooling and the battery has a cooling demand, the two electronic expansion valves are turned on, and the water pump 2 is turned on. The high-temperature and high-pressure refrigerant releases heat through the outdoor heat exchanger 118, and then simultaneously passes through the electronic expansion valves of the refrigerant heat exchanger 115 branch and the indoor evaporator 111 branch to become a low-temperature and low-pressure state, absorbing the heat of the battery coolant from the refrigerant heat exchanger 115, and absorbing the heat in the passenger compartment from the indoor evaporator 111, thereby realizing the cooling function of the cab and the battery.

[0096] Specifically, refer to Figure 7 , 8 , 9, Figure 7 , 8 9 are schematic diagrams of the working circuits in the single cab cooling mode, the single battery cooling mode and the cab and battery cooling mode respectively. In the cab cooling mode, the air conditioning refrigeration switch is turned on, and the battery does not need cooling and heating requirements. The corresponding opening conditions are that the air conditioning refrigeration switch is turned on and the knob is turned to cooling and the maximum battery temperature is ≤35°C. The execution action is to control the compressor to work, the first solenoid valve is turned on, the fan is turned on, and the first electronic expansion valve is automatically adjusted according to the superheat of the indoor heat exchanger outlet until the air conditioning refrigeration switch is turned off or the knob is not in the cooling position or the maximum battery temperature is greater than 35°C.

[0097] In the battery cooling mode, the corresponding applicable working conditions are that there is no cooling or heating demand in the cab, and the battery temperature is too high, and the air conditioning system needs to be cooled. The activation conditions are that the maximum battery temperature is ≥35°C, the ambient temperature is ≤30°C, and the motor water temperature is ≤35°C. The execution action is that the compressor works, the first solenoid valve, the fourth solenoid valve, and the sixth solenoid valve are turned on, the fan is turned on, the first water pump works, the four-way valves 1 and 3 are connected, and the second electronic expansion valve automatically adjusts according to the outlet superheat of the refrigerant heat exchanger until the air conditioning refrigeration switch is turned on or the knob is not in the cooling position or the maximum battery temperature is <32°C.

[0098] In the simultaneous cooling mode of the cab and the battery, the corresponding applicable working condition is that the cooling switch of the cab is turned on, and the battery temperature is too high. Both the cab and the battery pack need to be cooled. The opening condition is that the air-conditioning switch is turned on and the knob is turned to cooling and the maximum battery temperature is greater than 35°C. The execution action is that the compressor works, the first solenoid valve, the fourth solenoid valve, and the sixth solenoid valve are turned on, the fan is turned on, the first water pump works, the four-way valves 1 and 3 are connected, the compressor works, the first solenoid valve, the fan is turned on, and the first electronic expansion valve EXV1 is automatically adjusted according to the superheat of the indoor heat exchanger outlet until the cooling switch is turned off or the knob is not in the cooling position or the maximum battery temperature is less than 35°C.

[0099] Furthermore, step S30 further includes:

[0100] When the target operating mode is a heating mode, obtaining a heating switch state of a cab thermal management device;

[0101] The first electric auxiliary heating device, the second water pump, the fan, the compressor, the blower and at least one of the second electric auxiliary heating device are started according to the ambient temperature, the battery temperature, the motor temperature, the coolant temperature and the heating switch state, and the conduction state of at least one of the four-way valve, the three-way valve, the second solenoid valve, the third solenoid valve, the fifth solenoid valve, the second electronic expansion valve and the third electronic expansion valve is adjusted to increase the temperature of the cab or the battery pack.

[0102] It should be noted that the heating modes are divided into three types: single cab heating, single battery heating and cab & battery heating modes. Among them, single cab heating has multiple heating methods, including but not limited to: heating through PTC, heat pump heating, etc.

[0103] Specifically, refer to Fig.10 , 11 , 12, 13, 14, 15, 16 are circuit diagrams under different heating requirements. When the cab is heated by the electric auxiliary heating device, the corresponding applicable working condition is that the ambient temperature is too low, and the refrigerant cannot absorb heat from the environment to heat the cab. Therefore, it is necessary to use the PTC heater and blower in a separate air-conditioning box to provide heat to the cab. The start condition is that the ambient temperature is <-10℃, and the battery and motor electronic control temperature is <0℃, and the execution action is to start the electric auxiliary heating device.

[0104] When heating the cab environment through a heat pump, refer to Fig.10 , 11, the corresponding applicable working condition is that when the ambient temperature is low, the heat pump refrigerant cannot absorb heat from the environment, and at this time the battery or motor electronic control temperature is high and can absorb heat from the coolant. The opening condition is that the air conditioning heating mode is turned on, the ambient temperature is <-10℃, and the battery and motor electronic control temperature is >0℃. The execution action is that the second water pump works, the four-way valves 2 and 4 are connected, the fan is started, the three-way valves 1 and 2 are connected, the four-way valves 1 and 3 are connected, the compressor works, the second solenoid valve and the third solenoid valve are turned on, the fan is turned on, and the third electronic expansion valve is automatically controlled until the battery and motor electronic control temperature are <0℃; in addition, when the cab needs to be heated and the ambient temperature is high, and the refrigerant can absorb heat from the environment, the cab heating switch can be controlled to turn on, the ambient temperature is >-10℃, so that the compressor works, the second solenoid valve and the third solenoid valve are turned on, the third electronic expansion valve is automatically controlled, the fan is turned on, and the blower is turned on until the ambient temperature is <-10℃.

[0105] When heating the battery, refer to Fig.12 , 13 The corresponding applicable working condition is that the battery temperature is low, which affects the battery life, so it needs to be heated, and at this time the refrigerant can absorb heat from the environment. When the battery temperature is <20℃, and the ambient temperature and coolant temperature are >-10℃, the compressor is controlled to work, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve are opened, the second electronic expansion valve and the fan are automatically controlled, the second water pump works, the four-way valves 2 and 4 are connected, the three-way valves 2 and 3 are connected, and the four-way valves 1 and 3 are connected until the battery temperature is >30℃. In addition, the working condition can also be that the battery temperature is low, which affects the battery The battery life is prolonged, so it needs to be heated. At this time, the ambient temperature is too low, and the refrigerant cannot absorb heat from the environment. WPTC starts heating, and the refrigerant absorbs heat from the heated coolant. When the battery temperature is <20°C, and the ambient temperature and coolant temperature are <-10°C, the compressor is controlled to work, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve are opened, the second electronic expansion valve and the fan are automatically controlled, the second water pump works, the four-way valves 2 and 4 are connected, the three-way valves 2 and 3 are connected, the four-way valves 1 and 3 are connected, and the second electric auxiliary heating device starts heating.

[0106] When both the cab and the battery need to be heated, refer to Fig.14 , 15, the cab is in heating mode, the ambient temperature is low, the battery temperature is low, and the refrigerant absorbs heat from the environment. When the heating switch is turned on and the battery temperature is <20°C, and the ambient temperature is >-10°C, the compressor is controlled to work, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve are turned on, the second electronic expansion valve and the fan are automatically controlled, the second water pump is working, the four-way valves 2 and 4 are connected, the three-way valves 2 and 3 are connected, the four-way valves 1 and 3 are connected, and the third electronic expansion valve is automatically controlled; or the cab is in heating mode, the ambient temperature is low, and the battery temperature is low In this case, and the ambient temperature is low at this time, the refrigerant cannot absorb heat from the environment, and the cooling water is heated by PTC, and then the refrigerant absorbs heat through the water-cooled condenser. When the heating switch is turned on and the battery temperature is <20℃, and the ambient temperature is <-10℃, the compressor is controlled to work, the second solenoid valve, the third solenoid valve, and the fifth solenoid valve are opened, the second electronic expansion valve and the fan are automatically controlled, the second water pump works, the four-way valves 2 and 4 are connected, the three-way valves 2 and 3 are connected, the four-way valves 1 and 3 are connected, the third electronic expansion valve is automatically controlled, and the second electric auxiliary heating device starts heating.

[0107] Further, the adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device, and the motor thermal management device according to the control strategy corresponding to the target operating mode further includes:

[0108] When the target operating mode is a mixed mode of cab heating and battery cooling, obtaining a heating switch state of a cab thermal management device;

[0109] When the heating switch is turned on and the battery temperature is greater than a first temperature threshold, the compressor, the fan, the first water pump and the first electric auxiliary heating device are started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the sixth solenoid valve, the four-way valve and the second electronic expansion valve are adjusted to increase the temperature of the cab or reduce the temperature of the battery pack;

[0110] The opening degree of the second electronic expansion valve is determined according to the superheat degree of the refrigerant side outlet of the water-cooled heat exchanger.

[0111] In the specific implementation, refer to Fig.17 , Fig.17 This is a schematic diagram of the working circuit in the mixed mode of cab heating and battery cooling. In winter, the cab heating mode is turned on. After the vehicle is driven, in some extreme driving conditions, the battery temperature rises and needs to be cooled. If the cab heating switch is turned on and the battery temperature is >35°C, the compressor is controlled to work, the first solenoid valve, the fourth solenoid valve, and the sixth solenoid valve are turned on, the fan is turned on, the first water pump is working, the four-way valves 1 and 3 are connected, the superheat of the refrigerant side outlet of the second electronic expansion valve water-cooled heat exchanger is automatically adjusted, and the first electric auxiliary heating device starts heating.

[0112] Furthermore, the vehicle thermal management method further includes:

[0113] Get the coil temperature of the outdoor heat exchanger;

[0114] When the coil temperature is less than the second temperature threshold, the compressor is started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the third electronic expansion valve are adjusted.

[0115] refer to Fig.18 , Fig.18 This is a schematic diagram of the working circuit in defrost mode. When using a heat pump for heating, frost will form on the surface of the outdoor heat exchanger. At this time, the defrost function can be achieved by changing the flow direction of the refrigerant, turning off the fan, and using high-temperature refrigerant. When the outdoor heat exchanger temperature is <0°C, the compressor is controlled to start, the first solenoid valve and the fourth solenoid valve are opened, and the third electronic expansion valve is fully opened until the outdoor heat exchanger temperature is >5°C.

[0116] The above-mentioned temperature thresholds can be set by the user, or automatically set according to the historical data of the area where the vehicle is located, and this embodiment does not impose any specific restrictions on this.

[0117] This embodiment determines different operating modes according to vehicle temperature parameters and ambient temperature, and then adjusts the operating status of each component in the vehicle cab thermal management device, battery thermal management device and motor thermal management device according to the control strategy corresponding to the target operating mode to meet the user's usage needs and improve the user experience.

[0118] This application also provides a vehicle thermal management device, please refer to Fig.19 , the vehicle thermal management device comprises:

[0119] The acquisition module 10 is used to acquire the temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located.

[0120] The determination module 20 is used to determine the target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature.

[0121] The adjustment module 30 is used to adjust the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

[0122] In one embodiment, the regulating module 30 is also used to adjust the connectivity status of the three-way valve and the four-way valve, and the operating status of at least one of the first water pump, the second water pump and the fan according to the motor temperature, the electronic control temperature, the maximum temperature of the battery and the minimum temperature of the battery when the target operating mode is the heat dissipation mode, so as to reduce the temperature of the motor or the battery pack.

[0123] In one embodiment, the regulating module 30 is also used to obtain the cooling switch state of the cab thermal management device when the target operating mode is the cooling mode; adjust the conduction state of at least one of the first solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the first electronic expansion valve, the four-way valve, and the second electronic expansion valve according to the maximum temperature of the battery, the motor water temperature, the cooling switch state, and the ambient temperature, and start at least one element of the compressor, the fan, and the first water pump to reduce the temperature of the cab and / or the battery pack; wherein the opening of the first electronic expansion valve is determined according to the outlet superheat of the indoor heat exchanger, and the opening of the second electronic expansion valve is determined according to the outlet superheat of the refrigerant heat exchanger.

[0124] In one embodiment, the regulating module 30 is further used to obtain the heating switch state of the cab thermal management device when the target operating mode is the heating mode; start the first electric auxiliary heating device, the second water pump, the fan, the compressor, the blower and at least one element of the second electric auxiliary heating device according to the ambient temperature, the battery temperature, the motor temperature, the coolant temperature and the heating switch state, and adjust the conduction state of at least one element of the four-way valve, the three-way valve, the second solenoid valve, the third solenoid valve, the fifth solenoid valve, the second electronic expansion valve and the third electronic expansion valve to increase the temperature of the cab or the battery pack.

[0125] In one embodiment, the regulating module 30 is also used to obtain the heating switch state of the cab thermal management device when the target operating mode is a mixed mode of cab heating and battery cooling; when the heating switch state is turned on and the battery temperature is greater than the first temperature threshold, start the compressor, the fan, the first water pump and the first electric auxiliary heating device, and adjust the conduction states of the first solenoid valve, the fourth solenoid valve and the sixth solenoid valve, the four-way valve and the second electronic expansion valve to increase the temperature of the cab or reduce the temperature of the battery pack; wherein the opening of the second electronic expansion valve is determined according to the superheat of the refrigerant side outlet of the water-cooled heat exchanger.

[0126] In one embodiment, the regulating module 30 is also used to obtain the coil temperature of the outdoor heat exchanger; when the coil temperature is less than the second temperature threshold, the compressor is started and the conduction states of the first solenoid valve, the fourth solenoid valve and the third electronic expansion valve are adjusted.

[0127] This embodiment obtains the temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located; determines the target operating mode of the vehicle according to the temperature parameters and / or the ambient temperature; adjusts the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met, and determines the thermal management operating mode of the vehicle through the temperature parameters of each device in the vehicle in combination with the ambient temperature of the area where the vehicle is located, thereby adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the target thermal management operating mode of the vehicle, thereby achieving thermal management of the cockpit, battery and motor in the vehicle, and avoiding the technical problem of low vehicle thermal management efficiency of new energy vehicles in the prior art.

[0128] 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.

[0129] Reference below Fig. 20 , 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. Fig. 20 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.

[0130] like Fig. 20As 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the vehicle thermal management device, the vehicle thermal management device performs vehicle thermal management.

[0139] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate 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 may 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 may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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, characterized in that: The vehicle includes a cab thermal management device, a battery thermal management device and a motor thermal management device, wherein the cab thermal management device and the battery thermal management device are connected via a refrigerant heat exchanger, the cab thermal management device and the battery thermal management device are connected via a water-cooled heat exchanger, and the battery thermal management device and the motor thermal management device are connected via a four-way valve; The cab thermal management device includes a heat pump system, the heat pump system includes a heat pump internal unit and a heat pump external unit, the heat pump internal unit includes an internal unit heat exchanger, a blower, a first electric auxiliary heating device, a one-way valve and a refrigerant heat exchanger, and the heat pump external unit includes a compressor, a water-cooled heat exchanger, a plurality of solenoid valves, an external unit heat exchanger and a fan; The battery thermal management device comprises: a battery pack, a first expansion water tank, a first water pump and a refrigerant heat exchanger; The motor thermal management device includes a second water pump, a second electric auxiliary heating device, a second expansion water tank, a motor radiator, a three-way valve, a four-way valve, a motor and a motor control unit; The flow path between the first selection end of the three-way valve, the motor radiator and the motor forms a first motor heat exchange flow path; The second selection end of the three-way valve, the water side flow path of the water-cooled heat exchanger, the second electric auxiliary heating device and the flow path between the motor form a second motor heat exchange flow path.

2. The vehicle according to claim 1, characterized in that A first solenoid valve is provided between the exhaust port of the compressor and the refrigerant side inlet of the water-cooled heat exchanger, a second solenoid valve is provided between the exhaust port of the compressor and the one-way valve, a third solenoid valve is provided between the intake port of the compressor and the water-cooled heat exchanger, a fourth solenoid valve is provided between the intake port of the compressor and the indoor heat exchanger, a fifth solenoid valve is provided between the one-way valve and the second port of the refrigerant heat exchanger, and a sixth solenoid valve is provided between the indoor heat exchanger and the second port of the refrigerant heat exchanger.

3. The vehicle according to claim 2, characterized in that A first electronic expansion valve is provided between the one-way valve and the external heat exchanger, a second electronic expansion valve is provided between the first electronic expansion valve and the first port of the refrigerant heat exchanger, and a third electronic expansion valve is provided between the external heat exchanger and the internal heat exchanger.

4. A vehicle thermal management method, characterized in that: The vehicle thermal management method is applied to the vehicle as claimed in any one of claims 1 to 3; The vehicle thermal management method comprises: Obtaining temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located; determining a target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature; The operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device is adjusted according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

5. The vehicle thermal management method according to claim 4, characterized in that: The temperature parameters include at least: motor temperature, electric control temperature, and the maximum and minimum battery temperatures within a preset time; The step of adjusting the operating state of at least one of a cab thermal management device, a battery thermal management device, and a motor thermal management device according to a control strategy corresponding to the target operating mode includes: When the target operating mode is the heat dissipation mode, the connectivity status of the three-way valve and the four-way valve, and the operating status of at least one of the first water pump, the second water pump and the fan are adjusted according to the motor temperature, the electronic control temperature, the maximum battery temperature and the minimum battery temperature to reduce the temperature of the motor or the battery pack.

6. The vehicle thermal management method according to claim 5, characterized in that: The temperature parameters also include: motor water temperature; The vehicle thermal management method further includes: When the target operating mode is a cooling mode, obtaining a cooling switch state of a cab thermal management device; According to the maximum temperature of the battery, the water temperature of the motor, the refrigeration switch state and the ambient temperature, the conduction state of at least one of the first solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the first electronic expansion valve, the four-way valve and the second electronic expansion valve is adjusted, and at least one of the compressor, the fan and the first water pump is started to reduce the temperature of the cab and / or the battery pack; The opening degree of the first electronic expansion valve is determined according to the outlet superheat degree of the indoor heat exchanger, and the opening degree of the second electronic expansion valve is determined according to the outlet superheat degree of the refrigerant heat exchanger.

7. The vehicle thermal management method according to claim 5, characterized in that: The step of adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device, and the motor thermal management device according to the control strategy corresponding to the target operating mode further includes: When the target operating mode is a heating mode, obtaining a heating switch state of a cab thermal management device; The first electric auxiliary heating device, the second water pump, the fan, the compressor, the blower and at least one of the second electric auxiliary heating device are started according to the ambient temperature, the battery temperature, the motor temperature, the coolant temperature and the heating switch state, and the conduction state of at least one of the four-way valve, the three-way valve, the second solenoid valve, the third solenoid valve, the fifth solenoid valve, the second electronic expansion valve and the third electronic expansion valve is adjusted to increase the temperature of the cab or the battery pack.

8. The vehicle thermal management method according to claim 4, characterized in that: The step of adjusting the operating state of at least one of the cab thermal management device, the battery thermal management device, and the motor thermal management device according to the control strategy corresponding to the target operating mode further includes: When the target operating mode is a mixed mode of cab heating and battery cooling, obtaining a heating switch state of a cab thermal management device; When the heating switch is turned on and the battery temperature is greater than a first temperature threshold, the compressor, the fan, the first water pump and the first electric auxiliary heating device are started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the sixth solenoid valve, the four-way valve and the second electronic expansion valve are adjusted to increase the temperature of the cab or reduce the temperature of the battery pack; The opening degree of the second electronic expansion valve is determined according to the superheat degree of the refrigerant side outlet of the water-cooled heat exchanger.

9. The vehicle thermal management method according to claim 4, characterized in that: The vehicle thermal management method further includes: Get the coil temperature of the outdoor heat exchanger; When the coil temperature is less than the second temperature threshold, the compressor is started, and the conduction states of the first solenoid valve, the fourth solenoid valve and the third electronic expansion valve are adjusted.

10. A vehicle thermal management device, characterized in that: The vehicle thermal management device comprises: An acquisition module, used to acquire temperature parameters of each device in the vehicle and the ambient temperature of the area where the vehicle is located; a determination module, configured to determine a target operating mode of the vehicle according to the temperature parameter and / or the ambient temperature; The adjustment module is used to adjust the operating state of at least one of the cab thermal management device, the battery thermal management device and the motor thermal management device according to the control strategy corresponding to the target operating mode until the temperature-reaching shutdown condition corresponding to the target operating mode is met.

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