Integrated vehicle thermal management system and control method thereof

Abstract

The application relates to an integrated whole-vehicle thermal management system and a control method thereof, which comprises a structural box body; a processing device is arranged on the structural box body; the processing device is electrically connected with a sensor unit, and the processing device is electrically connected with an execution unit; the execution unit comprises a circulating water path unit and a circulating refrigerant unit; a water-fluorine heat exchanger is arranged between the circulating water path unit and the circulating refrigerant unit to perform heat exchange; and the application has the advantages of reasonable design, compact structure and convenient use.

Description

TECHNICAL FIELD

[0001] The present application relates to an integrated vehicle thermal management system and a control method thereof, and belongs to the field of new energy vehicles, in particular to an integrated and modular vehicle thermal management system applied to a pure electric commercial vehicle and a control method thereof. BACKGROUND

[0002] A pure electric vehicle refers to a vehicle that uses a vehicle-mounted power source as power and drives wheels by using an electric motor. Unlike a traditional internal combustion vehicle, a pure electric vehicle does not have an internal combustion engine, and accordingly has a battery. The battery, as a vehicle-mounted energy storage system, provides electric energy for power motor driving, and can store feedback electric energy from the power motor. The heating of the driver's cabin of a traditional internal combustion engine vehicle usually uses engine waste heat, that is, the engine coolant is introduced into the driver's cabin water heating box, and the air conditioner fan provides warm air for the driver; the driver's cabin cooling is provided by the engine-mounted mechanical air conditioner compressor to provide low-temperature refrigerant for the evaporator box, and the air conditioner fan provides cold air for the driver's cabin.

[0003] Compared with a traditional internal combustion engine vehicle, a pure electric vehicle does not have an engine, and the driver's cabin heating box has no hot water source, and the mechanical air conditioner compressor has no power source, so the traditional driver's cabin heating and cooling system cannot be used. At the same time, the optimal use temperature of the battery is in the range of 20-30℃, and the battery temperature may deviate from the optimal use temperature due to the influence of environmental temperature and self-charging and discharging temperature rise, so the battery needs to be heated or cooled. The conventional pure electric vehicle uses a PTC heater for driver's cabin heating, and uses an electric air conditioner compressor for driver's cabin cooling; the battery is usually cooled by natural cooling, forced liquid cooling or a separate air conditioner compressor cooling method, and is heated by a built-in PTC heating film. Under the conventional scheme, the PTC heater is directly used in the driver's cabin, and the heating uniformity is poor due to the influence of air specific heat capacity, and the high-voltage line is relatively unsafe in the driver's cabin. The reliability of the conventional PTC heating film for battery heating is relatively poor, and the heating temperature difference is large; natural cooling, forced liquid cooling or separate air conditioner compressor cooling has the disadvantages of low cooling efficiency and high system cost. SUMMARY

[0004] In view of the problems of poor safety, low integration and low efficiency of the conventional pure electric vehicle thermal management system, the present application has a modular, integrated, efficient and safe vehicle-level thermal management system, which can realize driver's cabin heating and cooling, battery heating and cooling, has high integration, good safety, compact structure and good process characteristics, and is particularly suitable for pure electric trucks, buses and other vehicles.

[0005] To solve the above problems, the technical scheme adopted by the present application is:

[0006] An integrated whole vehicle thermal management system comprises a structural box; a processing device is arranged on the structural box; the processing device is electrically connected with a sensor unit, and the processing device is electrically connected with an execution unit;

[0007] The execution unit comprises a circulating water circuit unit and a circulating refrigerant unit;

[0008] A water-fluorine heat exchanger is arranged between the circulating water circuit unit and the circulating refrigerant unit to perform heat exchange.

[0009] As a further improvement of the above technical solution:

[0010] The circulating water circuit unit comprises an electric heating water heater, a warm air water pump, a battery water pump, a water inlet end three-way reversing valve, a water outlet end three-way reversing valve,

[0011] a battery water inlet pipe, a battery water inlet three-way pipe to the electric heating water heater pipe, a battery water inlet three-way pipe to the water-fluorine heat exchanger pipe, a battery water outlet pipe, a battery water outlet three-way pipe to the electric heating water heater pipe, a battery water outlet three-way pipe to the water-fluorine heat exchanger pipe, a cab warm air outlet pipe and a cab warm air inlet pipe;

[0012] One end of the battery water outlet pipe is connected with a V1 port of the water inlet end three-way reversing valve, and the other end is connected with a water outlet of a battery 112 matched with the system; one end of the battery water inlet pipe is connected with a V1 port of the water outlet end three-way reversing valve, and the other end is connected with a water inlet of the battery 112 matched with the system;

[0013] The V2 port and the V3 port of the water inlet end three-way reversing valve are connected with the electric heating water heater and the water-fluorine heat exchanger through the battery water inlet three-way pipe to the electric heating water heater pipe and the battery water inlet three-way pipe to the water-fluorine heat exchanger pipe respectively;

[0014] The V2 port and the V3 port of the water outlet end three-way reversing valve are connected with the electric heating water heater and the water-fluorine heat exchanger through the battery water outlet three-way pipe to the electric heating water heater pipe and the battery water outlet three-way pipe to the water-fluorine heat exchanger pipe respectively; the water inlet end three-way reversing valve and the water outlet end three-way reversing valve are both two-position three-way valves.

[0015] The circulating refrigerant unit comprises a condenser, a compressor, an on-off valve, an electronic expansion valve,

[0016] a compressor-to-condenser refrigerant pipe, a condenser-to-expansion valve refrigerant pipe, a condenser-to-evaporator condensing pipe, a water-fluorine heat exchanger-to-compressor refrigerant pipe and an evaporator-to-compressor refrigerant pipe;

[0017] The electronic expansion valve comprises an electronic expansion valve A and an electronic expansion valve B;

[0018] The condenser is provided with a heat dissipation fan.

[0019] The outlet end of the compressor is connected with the condenser through a compressor-to-condenser refrigerant pipe; the condenser is connected with the electronic expansion valve A through a condenser-to-expansion valve refrigerant pipe; the on-off valve is connected in series on the condenser-to-evaporator condensing pipe; one end of the condenser-to-evaporator condensing pipe is connected with the condenser, and the other end is connected with the high-pressure side of the evaporator 111 of the cab matched with the system; the electronic expansion valve A is connected with the water-fluorine heat exchanger; a water-fluorine heat exchanger-to-compressor refrigerant pipe connects the water-fluorine heat exchanger with the air inlet of the compressor; one end of an evaporator-to-compressor refrigerant pipe is connected with the air inlet of the compressor, and the other end is connected with the low-pressure side of the cab evaporator matched with the system.

[0020] The sensor unit comprises a water-fluorine heat exchanger high-pressure side sensor, a water-fluorine heat exchanger low-pressure side sensor, a battery water outlet sensor B, a battery water outlet sensor B, a heater water outlet sensor, an evaporator high-pressure side sensor, an evaporator low-pressure side pressure temperature sensor, an ambient temperature sensor, and a cab sensor.

[0021] The water-fluorine heat exchanger high-pressure side sensor is arranged on the condenser-to-expansion valve refrigerant pipe.

[0022] The water-fluorine heat exchanger low-pressure side sensor is arranged on the water-fluorine heat exchanger-to-compressor refrigerant pipe.

[0023] The battery water outlet sensor B is arranged on the battery water outlet pipe.

[0024] The battery water outlet sensor B is arranged on the battery water inlet pipe.

[0025] The heater water outlet sensor is arranged on the cab heater water inlet pipe.

[0026] The evaporator high-pressure side sensor is arranged on the condenser-to-evaporator condensing pipe.

[0027] The evaporator low-pressure side pressure temperature sensor is arranged on the evaporator-to-compressor refrigerant pipe.

[0028] The ambient temperature sensor is arranged on one side of the condenser.

[0029] The cab sensor is arranged in the cab.

[0030] The processing device adopts an MCU or a PLC controller; the MCU or the PLC controller is electrically connected with a driver, and the driver is electrically connected with a corresponding execution unit.

[0031] The processing device receives the collection signals of the sensors to control the actions of the execution units.

[0032] The processing device is connected with a whole vehicle associated control unit matched therewith through a communication line.

[0033] When the data collected by the sensor is greater than the set threshold, the PLC controller controls the corresponding driver to control the execution unit by switching on or off the comparator circuit, the triode switch or the MOS tube switch.

[0034] A control method of an integrated vehicle thermal management system, the control method comprising the following steps:

[0035] S01: The processor obtains the heating power coefficient Pbph or the refrigeration power coefficient Pbpc required by the battery based on the current temperature Tbp of the battery, the low target temperature threshold Ttl of the battery, the high target temperature threshold Tth of the battery, and the outlet temperature Tbpout of the battery;

[0036] S02: The processor obtains the heating power coefficient Pcabh or the refrigeration power coefficient Pcabc required by the cab based on the cab air conditioning mode, the real-time temperature of the cab, and the target temperature of the cab;

[0037] S03: First, the processor obtains the power coefficient of the compressor; then, when the power coefficient is not 0, the processor outputs a preset target speed to the compressor, and the compressor responds to the target speed; secondly, the processor obtains the power coefficient of the electric heating water heater, and outputs a target power to the electric heating water heater when the power coefficient is not 0, and the electric heating water heater responds to the target power;

[0038] S04: The processor controls the on-off valve, the electronic expansion valve, the three-way valve, the heater water pump, the battery water pump, and the cooling fan through the driver based on the battery heating or cooling mode and the cab air conditioning mode;

[0039] S05: When the battery water pump, the heater water pump, the cooling fan, and the electronic expansion valve are working, the processor controls the functions and performances of the battery water pump, the heater water pump, the cooling fan, and the electronic expansion valve, respectively.

[0040] As a further improvement of the above technical solution:

[0041] The processor obtains the state information of the compressor in real time, and the compressor receives the control information of the processor and performs a control response;

[0042] The state information of the compressor includes the compressor speed, the compressor voltage, the compressor current, and the compressor fault state;

[0043] The control information received by the compressor includes the compressor enable and the target speed of the compressor;

[0044] The processor controls the opening degree of the electronic expansion valve, and the opening degree control signal type includes the PWM signal, the LIN bus, or the CAN bus.

[0045] The processing device controls the rotating speed of the heat dissipation fan, and the rotating speed control signal type includes a PWM signal, a LIN bus or a CAN bus;

[0046] The processing device controls the opening and closing of the on-off valve;

[0047] The processing device acquires the state information of the electric heating water heater in real time, and the electric heating water heater receives the control information of the processing device in real time and performs a control action;

[0048] The state information of the electric heating water heater includes outlet temperature, electric heating water heater voltage, real-time working current and fault information.

[0049] The processing device controls the rotating speed of the heating water pump and the battery water pump;

[0050] The processing device controls the valve position switching of the water inlet end three-way reversing valve and the water outlet end three-way reversing valve;

[0051] The processing device and the water inlet end three-way reversing valve and the water outlet end three-way reversing valve realize position switching through LIN communication or power driving;

[0052] The processing device collects the information values of the water-fluorine heat exchanger high-pressure side sensor, the water-fluorine heat exchanger low-pressure side sensor, the battery water inlet sensor A, the battery water outlet sensor B, the heating water outlet sensor, the evaporator high-pressure side sensor, the evaporator low-pressure side pressure temperature sensor, the environment temperature sensor and the cab sensor in real time;

[0053] The processing device receives control instructions from the whole vehicle, including cab target temperature, cab heating and cooling mode, battery current temperature, battery target temperature low threshold value and battery target temperature high threshold value; and the processing device controls the execution components based on the control instructions of the whole vehicle.

[0054] In S01, the following steps are performed;

[0055] S01A: When the battery current temperature Tbp is lower than the battery target temperature low threshold value Ttl, the processing device looks up the table MAP(Ttl-Tbp) to obtain the basic power coefficient Pbphraw of the electric heating water heater, looks up the table MAP(Tbpout) through the battery water outlet temperature Tbpout to obtain the power correction coefficient Kbphr of the electric heating water heater, and calculates the power coefficient Pbph required for battery heating Pbph=Pbphraw*Kbphr; at this time, the power coefficient Pbpc required for battery cooling is 0;

[0056] S01B: When the battery current temperature Tbp is greater than the battery target temperature low threshold Ttl, and less than the battery target temperature threshold Tth, at this time the battery has no heating or cooling requirements; the required heating power coefficient and cooling power coefficient are both Pbph=Pbpc=0;

[0057] S01C: When the battery current temperature Tbp is greater than the battery target temperature threshold Tth, the processor looks up the table MAP(Tth-Tbp) to obtain the basic refrigeration power coefficient of the compressor Pbpcraw, and looks up the table MAP(Tbpout) through the battery outlet water temperature Tbpout to obtain the refrigeration power correction coefficient of the compressor Kbpcr, and calculates the power coefficient required for battery refrigeration Pbpc=Pbpcraw*Kbpcr; At this time, the power coefficient required for battery heating Pbph=0;

[0058] In S02, the following steps are performed;

[0059] S02A: When the cab air conditioner is in fresh air mode, at this time Pcabh=Pcabc=0;

[0060] S02B: When the cab air conditioner is in heating mode, the processor looks up the table MAP(Tcab-Ttcab) according to the cab current temperature Tcab and the cab target temperature Ttcab to obtain the basic power coefficient of the electric heating water heating Pcabhraw, and looks up the table MAP(Tcabout) through the heating outlet water temperature Tcabout to obtain the power correction coefficient of the electric heating water heating Kcabhr, and calculates the power coefficient required for cab heating Pcabh=Pcabhraw*Kcabhr; At this time, the power coefficient required for cab cooling Pcabc=0;

[0061] Wherein, the MAP table and the table lookup are the control data association or acquisition methods commonly used in calculation or control; the MAP table is a data structure for storing key-value pairs, and the two-dimensional table is the simplest MAP table, which stores two sets of data, one set of input data and one set of output structure, such as one set of data is input value, 1, 2, 3, 4, 5, and another set of data is output value, 2, 4, 6, 8, 10, when input 1, the table lookup can obtain value 2, when input 3, the table lookup obtains value 6. The process of data in the MAP table is the process of data calibration.

[0062] S02C: When the cab air conditioner is in the cooling mode, the processor looks up the table MAP(Tcab-Ttcab) according to the current cab temperature Tcab and the target cab temperature Ttcab to obtain the basic power coefficient Pcabcraw of the compressor, looks up the table MAP(Tcabrout) according to the low-pressure side temperature Tcabrout of the evaporator to obtain the power correction coefficient Kcabrcr of the compressor, and calculates the power coefficient Pcabc required for cab cooling as Pcabc=Pcabcraw*Kcabcr; at this time, the power coefficient Pcabh required for cab heating is 0;

[0063] In S03, the following steps are performed;

[0064] S03A: The power coefficient Pc of the compressor is Max(Pcabc, Pbpc), and the target speed of the compressor is obtained through MAP(Pc);

[0065] S03B: The power coefficient Ph of the electrically heated water heater is Max(Pcabh, Pbph), and the target power of the electrically heated water heater is obtained through MAP(Ph);

[0066] In S04, the following steps are performed;

[0067] S04A: When the battery does not need to be cooled or heated;

[0068] S04AA: When the cab air conditioner is in the fresh air mode, each component performs initial state control;

[0069] S04AB: When the cab air conditioner is in the cooling mode, the processor controls the on-off valve to be opened and controls the cooling fan to work, and the remaining components are in the initial state;

[0070] S04AC: When the cab air conditioner is in the heating mode, the processor controls the water heater pump to work, and the remaining components are in the initial state;

[0071] S04B: When the battery is in the heating mode;

[0072] S04BA: When the cab air conditioner is in the fresh air mode, the processor controls the battery water pump to work, controls the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the motor hot water heater circuit, and the remaining components are in the initial state;

[0073] S04BB: When the cab air conditioner is in the cooling mode, the processor controls the battery water pump to work, controls the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the motor hot water heater circuit, controls the on-off valve to be opened, controls the cooling fan to work, and the remaining components are in the initial state;

[0074] S04BC: When the cab air conditioner is in heating mode, the processing device controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the motor hot water heating circuit, controls the warm air water pump to work, and the remaining components are in the initial state;

[0075] S04C: When the battery is in cooling mode;

[0076] S04CA: When the cab air conditioner is in fresh air mode, the processing device controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, and the remaining components are in the initial state;

[0077] S04CB: When the cab air conditioner is in cooling mode, the processing device controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, and controls the on-off valve to open, and the remaining components are in the initial state;

[0078] S04CC: When the cab air conditioner is in heating mode, the processing device controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, and controls the warm air water pump to open, and the remaining components are in the initial state;

[0079] In S05, the following steps are performed;

[0080] S0501: The processing device looks up the table MAP(MAX(|Tbp-Ttl|, |Tbp-Tth|)) according to the current battery temperature Tbp, the low battery target temperature threshold Ttl, and the high battery target temperature threshold Tth, obtains the target speed of the battery water pump, and the battery water pump receives a control instruction and responds to the target speed control;

[0081] S0502: The processing device looks up the table MAP(Ttcab-Tcab) according to the cab target temperature Ttcab and the real-time cab temperature Tcab, obtains the target speed of the warm air water pump, and the warm air water pump receives a control instruction and responds to the target speed control:

[0082] S0503: The processing device looks up the table MAP(Prsh) according to the evaporator high-pressure side pressure Prsh, obtains the initial speed Nfanraw of the cooling fan, looks up the table MAP(Ncmp) according to the compressor speed Ncmp, obtains the correction coefficient Kfan of the cooling fan speed, and thus obtains the target speed Nfan of the cooling fan;

[0083] S0504: The processor obtains the saturated temperature Trfgf of the refrigerant according to the low-pressure side refrigerant pressure Prsl of the evaporator and the table MAP(Prsl), obtains the initial opening degree Ohvraw of the electronic expansion valve according to the low-pressure side refrigerant temperature Trfgl and the table MAP(Trfgl-Trfgf), obtains the electronic expansion valve opening correction coefficient Khvr according to the high-pressure side refrigerant pressure Prsh and the table MAP(Prsh), and calculates the electronic expansion valve opening value Ohv=Ohvraw*Khvr.

[0084] The application uses a single, integrated, modular unit to achieve cab temperature adjustment, battery two-way temperature adjustment, and has the advantages of low cost, good processability, high integration, flexible control, etc.

[0085] The application has the advantages of reasonable design, low cost, durability, safety and reliability, simple operation, time and labor saving, cost saving, compact structure and convenient use. BRIEF DESCRIPTION OF DRAWINGS

[0086] Figure 1 It is a use structure schematic diagram of the application. DETAILED DESCRIPTION

[0087] As Figure 1 An integrated vehicle thermal management system includes a structural box; a processor is arranged on the structural box; the processor is electrically connected with a sensor unit, and the processor is electrically connected with an execution unit;

[0088] The execution unit includes a circulating water circuit unit and a circulating refrigerant unit;

[0089] A water-fluorine heat exchanger is arranged between the circulating water circuit unit and the circulating refrigerant unit to perform heat exchange.

[0090] As a further improvement of the above technical solution:

[0091] The circulating water circuit unit includes an electric heating water heater, a cabin heating water pump, a battery water pump, a water inlet three-way reversing valve, a water outlet three-way reversing valve,

[0092] A battery water inlet pipe, a battery water inlet three-way pipe to the electric heating water heater pipe, a battery water inlet three-way pipe to the water-fluorine heat exchanger pipe, a battery water outlet pipe, a battery water outlet three-way pipe to the electric heating water heater pipe, a battery water outlet three-way pipe to the water-fluorine heat exchanger pipe, a cabin heating water outlet pipe, and a cabin heating water inlet pipe;

[0093] One end of the battery water outlet pipe is connected to the V1 port of the water inlet three-way reversing valve, and the other end is connected to the water outlet of the battery 112 matched by the system; one end of the battery water inlet pipe is connected to the V1 port of the water outlet three-way reversing valve, and the other end is connected to the water inlet of the battery 112 matched by the system;

[0094] The V2 port and the V3 port of the water inlet end three-way reversing valve are connected with the electric heating water heater and the water-fluorine heat exchanger through the battery water inlet three-way pipe and the battery water inlet three-way pipe to the water-fluorine heat exchanger pipe respectively;

[0095] The V2 port and the V3 port of the water outlet end three-way reversing valve are connected with the electric heating water heater and the water-fluorine heat exchanger through the battery water outlet three-way pipe and the battery water outlet three-way pipe to the water-fluorine heat exchanger pipe respectively; the water inlet end three-way reversing valve and the water outlet end three-way reversing valve are both two-position three-way valves.

[0096] The circulating refrigerant unit comprises a condenser, a compressor, an on-off valve, an electronic expansion valve,

[0097] The compressor is connected with the condenser through a compressor-to-condenser refrigerant pipe; the condenser is connected with the electronic expansion valve A through a condenser-to-expansion valve refrigerant pipe; the on-off valve is connected in series on the condenser-to-evaporator condensing pipe; one end of the condenser-to-evaporator condensing pipe is connected with the condenser, and the other end is connected with the high-pressure side of the evaporator 111 of the cab matched with the system; the electronic expansion valve A is connected with the water-fluorine heat exchanger; a water-fluorine heat exchanger-to-compressor refrigerant pipe connects the water-fluorine heat exchanger with the air inlet of the compressor; one end of the evaporator-to-compressor refrigerant pipe is connected with the air inlet of the compressor, and the other end is connected with the low-pressure side of the cab evaporator matched with the system.

[0098] The electronic expansion valve comprises an electronic expansion valve A and an electronic expansion valve B;

[0099] The condenser is provided with a cooling fan;

[0100] The compressor is connected with the condenser through a compressor-to-condenser refrigerant pipe; the condenser is connected with the electronic expansion valve A through a condenser-to-expansion valve refrigerant pipe; the on-off valve is connected in series on the condenser-to-evaporator condensing pipe; one end of the condenser-to-evaporator condensing pipe is connected with the condenser, and the other end is connected with the high-pressure side of the evaporator 111 of the cab matched with the system; the electronic expansion valve A is connected with the water-fluorine heat exchanger; a water-fluorine heat exchanger-to-compressor refrigerant pipe connects the water-fluorine heat exchanger with the air inlet of the compressor; one end of the evaporator-to-compressor refrigerant pipe is connected with the air inlet of the compressor, and the other end is connected with the low-pressure side of the cab evaporator matched with the system.

[0101] The sensor unit comprises a water-fluorine heat exchanger high-pressure side sensor, a water-fluorine heat exchanger low-pressure side sensor, a battery water outlet sensor B, a battery water outlet sensor B, a warm air outlet sensor, an evaporator high-pressure side sensor, an evaporator low-pressure side pressure temperature sensor, an environment temperature sensor, and a cab sensor;

[0102] The water-fluorine heat exchanger high-pressure side sensor is arranged on the condenser-to-expansion valve refrigerant pipe;

[0103] The water-fluorine heat exchanger low-pressure side sensor is arranged on the water-fluorine heat exchanger-to-compressor refrigerant pipe;

[0104] The battery water outlet sensor B is arranged on the battery water outlet pipe;

[0105] The battery water outlet sensor B is arranged on the battery water inlet pipe;

[0106] The warm air outlet sensor is arranged on the cab warm air inlet pipe;

[0107] A high-pressure side sensor of the evaporator is arranged on a condenser-to-evaporator condensing pipe;

[0108] A low-pressure side pressure temperature sensor of the evaporator is arranged on an evaporator-to-compressor refrigerant pipe;

[0109] An ambient temperature sensor is arranged on one side of the condenser;

[0110] A cab sensor is arranged in the cab.

[0111] The processing device adopts an MCU or PLC controller; the processing device 108 is composed of an aluminum alloy shell and an internal circuit board, wherein the internal circuit board is connected with a vehicle CAN bus through a data interface; the MCU or PLC controller is electrically connected with a driver, and the driver is electrically connected with a corresponding execution unit;

[0112] The processing device receives the collection signals of the sensors to control the actions of the execution units;

[0113] The processing device is connected with a matched vehicle associated control unit through a communication line;

[0114] When the data collected by the sensors is greater than a set threshold value, the PLC controller controls the corresponding driver by turning on or off a comparator circuit switch or a triode switch or a MOS tube switch.

[0115] As Figure 1 , the integrated vehicle thermal management system comprises a compressor 103, a condenser 101, an electronic expansion valve A 203, a water-fluorine heat exchanger 105, a system-matched cab evaporator 111, a system-matched cab sensor, a system-matched ambient temperature sensor, a system-matched high-pressure side sensor of the evaporator, a system-matched low-pressure side pressure temperature sensor of the evaporator, a system-matched on-off valve 204, a system-matched driver, and a processing device 108.

[0116] An outlet end of the compressor 103 is connected with the condenser 101 through a compressor-to-condenser refrigerant pipe 501; the condenser 101 is connected with the electronic expansion valve A 203 through a condenser-to-expansion valve refrigerant pipe 502; the on-off valve 204 is connected in series on a condenser-to-evaporator condensing pipe 503; one end of the condenser-to-evaporator condensing pipe 503 is connected with the condenser 101, and the other end is connected with a high-pressure side of the system-matched cab evaporator 111;

[0117] The electronic expansion valve 203 is connected with the water-fluorine heat exchanger 105; a water-fluorine heat exchanger-to-compressor refrigerant pipe 504 connects the water-fluorine heat exchanger 105 with an air inlet of the compressor 103; one end of an evaporator-to-compressor refrigerant pipe 505 is connected with the air inlet of the compressor 103, and the other end is connected with a low-pressure side of the system-matched cab evaporator 111;

[0118] One end of the battery water outlet pipe 404 is connected to the V1 port of the water inlet end three-way reversing valve 201, and the other end is connected to the water outlet of the matched battery of the system; one end of the battery water inlet pipe 401 is connected to the V1 port of the water outlet end three-way reversing valve 202, and the other end is connected to the water inlet of the matched battery of the system;

[0119] The V2 port and the V3 port of the water inlet end three-way reversing valve 201 are respectively connected to the electric heating water heater 104 and the water fluorine heat exchanger 105 through the battery water inlet three-way to electric heating water heater pipe 402 and the battery water inlet three-way to water fluorine heat exchanger pipe 403;

[0120] The V2 port and the V3 port of the water outlet end three-way reversing valve 202 are respectively connected to the electric heating water heater 104 and the water fluorine heat exchanger 105 through the battery water outlet three-way to electric heating water heater pipe 405 and the battery water outlet three-way to water fluorine heat exchanger pipe 406;

[0121] Further, the water inlet end three-way reversing valve 201 and the water outlet end three-way reversing valve 202 are both two-position three-way valves, which have V1, V2 and V3 three interfaces, and two positions respectively realize the conduction of V1 to V2, the sealing of V3 and V1 and V2, and the conduction of V1 and V3, and the sealing of V2 and V1 and V3.

[0122] The cab heater water pump 106 is connected in series on the cab heater water inlet pipe 408, one end of the cab heater water inlet pipe 408 is connected to the electric heating water heater 104, and the other end is connected to the cab heater water inlet 408 of the matched system; one end of the cab heater water outlet pipe 407 is connected to the electric heating water heater 104, and the other end is connected to the cab heater water inlet 408 of the matched system;

[0123] The battery water inlet sensor A303 and the battery water outlet sensor B304 are connected in series on the battery water inlet pipe 401 and the battery water outlet pipe 404 respectively;

[0124] The cab heater water outlet sensor 305 is connected in series on the cab heater water outlet pipe 407;

[0125] The evaporator high-pressure side sensor 306 is connected in series on the condenser to evaporator condensing pipe 503, and the evaporator low-pressure side pressure temperature sensor 307 is connected in series on the evaporator to compressor refrigerant pipe 505.

[0126] The processing device 108 is connected to the matched whole vehicle associated control unit through a communication line;

[0127] The processor 108 controls the compressor 101, the heat dissipation fan 102, the electronic expansion valve 203, the on-off valve 204, the electric heating water heater 104, the water inlet end three-way reversing valve 201, the water outlet end three-way reversing valve 202, the heater water pump 106, and the battery water pump 107, and realizes the connection of the water fluorine heat exchanger high-pressure side sensor 301, the water fluorine heat exchanger low-pressure side sensor 302, the battery water outlet sensor B 303, the battery water outlet sensor B 304, the heater water outlet sensor 305, the evaporator high-pressure side sensor 306, the evaporator low-pressure side pressure temperature sensor 307, and the environment temperature sensor 308 through a wire harness.

[0128] The structure box 109 envelopes the above-mentioned components, wherein the battery water inlet pipe 401, the battery water outlet pipe 404, the cab heater water outlet pipe 407, the cab heater water inlet pipe 408, the compressor to condenser refrigerant pipe 501, the condenser to evaporator condensing pipe 503, and the evaporator to compressor refrigerant pipe 505 have waterway, refrigerant, and the like pipe joints matched with the vehicle evaporator, the condenser, and the battery connected on the structure box 109.

[0129] A control method of an integrated vehicle thermal management system, comprising:

[0130] The processor 108 acquires the state information of the compressor in real time, and the compressor receives the control information of the processor 108 and performs a control response;

[0131] Further, the compressor state information includes the compressor speed, the compressor voltage, the compressor current, and the compressor fault state.

[0132] Further, the control information received by the compressor includes the compressor enable and the compressor target speed.

[0133] The processor 108 controls the opening degree of the electronic expansion valve, and the opening degree control signal type includes a PWM signal, a LIN bus, and a CAN bus.

[0134] The processor 108 controls the speed of the heat dissipation fan 102, and the speed control signal type includes a PWM signal, a LIN bus, and a CAN bus.

[0135] The processor 108 controls the opening and closing of the on-off valve.

[0136] The processor 108 acquires the state information of the electric heating water heater in real time, and the electric heating water heater receives the control information of the processor 108 in real time and performs a control action.

[0137] Further, the state information of the electric heating water heater includes outlet temperature, electric heating water heater voltage, real-time working current, and fault information.

[0138] The processor 108 controls the rotation speed of the heater water pump and the battery water pump.

[0139] The processor 108 controls the valve position switching of the water inlet end three-way reversing valve and the water outlet end three-way reversing valve.

[0140] Further, the processor 108 and the water inlet end three-way reversing valve and the water outlet end three-way reversing valve realize position switching through LIN communication or power driving.

[0141] The processor 108 collects the information values of the water-fluorine heat exchanger high-pressure side sensor, the water-fluorine heat exchanger low-pressure side sensor, the battery water inlet sensor A, the battery water outlet sensor B, the heater water outlet sensor, the evaporator high-pressure side sensor, the evaporator low-pressure side pressure temperature sensor, the ambient temperature sensor, and the cab sensor in real time.

[0142] The processor 108 receives control instructions from the whole vehicle, including cab target temperature, cab heating and cooling mode, battery current temperature, battery target temperature low threshold, and battery target temperature high threshold; the processor 108 controls the execution components based on the above control instructions.

[0143] S01: The processor 108 obtains the heating power coefficient Pbph or the cooling power coefficient Pbpc required by the battery based on the battery current temperature Tbp, the battery target temperature low threshold Ttl, the battery target temperature high threshold Tth, and the battery water outlet temperature Tbpout.

[0144] S01A: When the battery current temperature Tbp is lower than the battery target temperature low threshold Ttl, the processor 108 looks up the table MAP(Ttl-Tbp) to obtain the basic power coefficient Pbphraw of the electric heating water heater, looks up the table MAP(Tbpout) through the battery water outlet temperature Tbpout to obtain the power correction coefficient Kbphr of the electric heating water heater, and calculates the power coefficient Pbph required by the battery heating as Pbph=Pbphraw*Kbphr; at this time, the power coefficient Pbpc required by the battery cooling is 0.

[0145] S01B: When the battery current temperature Tbp is greater than the battery target temperature low threshold Ttl and less than the battery target temperature threshold Tth, at this time, the battery has no heating or cooling demand; the required heating power coefficient and the cooling power coefficient are both Pbph=Pbpc=0.

[0146] S01C: When the battery current temperature Tbp is greater than the battery target temperature threshold Tth, the processing device (108) looks up the table MAP (Tth-Tbp) to obtain the basic refrigeration power coefficient Pbpcraw of the compressor, looks up the table MAP (Tbpout) through the battery outlet water temperature Tbpout to obtain the refrigeration power correction coefficient Kbpcr of the compressor, and calculates the power coefficient Pbpc required for battery refrigeration = Pbpcraw*Kbpcr; At this time, the power coefficient Pbph required for battery heating = 0;

[0147] S02: The processing device 108 obtains the heating power coefficient Pcabh or the refrigeration power coefficient Pcabc required for the cab based on the cab air conditioning mode, the cab real-time temperature, and the cab target temperature;

[0148] S02A: When the cab air conditioner is in fresh air mode, at this time Pcabh=Pcabc=0;

[0149] S02B: When the cab air conditioner is in heating mode, the processing device 108 looks up the table MAP (Tcab-Ttcab) according to the cab current temperature Tcab and the cab target temperature Ttcab to obtain the basic power coefficient Pcabhraw of the electric heating water heater, looks up the table MAP (Tcabout) through the warm air outlet water temperature Tcabout to obtain the power correction coefficient Kcabhr of the electric heating water heater, and calculates the power coefficient Pcabh required for cab heating = Pcabhraw*Kcabhr; At this time, the power coefficient Pcabc required for cab cooling = 0;

[0150] S02C: When the cab air conditioner is in refrigeration mode, the processing device 108 looks up the table MAP (Tcab-Ttcab) according to the cab current temperature Tcab and the cab target temperature Ttcab to obtain the basic power coefficient Pcabcraw of the compressor, looks up the table MAP (Tcabrout) through the evaporator low-pressure side temperature Tcabrout to obtain the power correction coefficient Kcabrcr of the compressor, and calculates the power coefficient Pcabc required for cab refrigeration = Pcabcraw*Kcabcr; At this time, the power coefficient Pcabh required for cab heating = 0;

[0151] S03: The processing device 108 obtains the power coefficient of the compressor, when the power coefficient is not 0, outputs the target speed to the compressor, and the compressor responds to the target speed; The processing device 108 obtains the power coefficient of the electric heating water heater, when the power coefficient is not 0, outputs the target power to the electric heating water heater, and the electric heating water heater responds to the target power;

[0152] S03A: the power coefficient of the compressor Pc = Max (Pcabc, Pbpc), through MAP (Pc), the target speed of the compressor is obtained;

[0153] S03B: the power coefficient of the electric heating water heater Ph = Max (Pcabh, Pbph), through MAP (Ph), the target power of the electric heating water heater is obtained;

[0154] S04: the processor 108 controls the on-off valve, the electronic expansion valve, the three-way valve, the heating water pump, the battery water pump and the heat dissipation fan 102 based on the battery heating or cooling mode and the cab air conditioning mode;

[0155] S04A: when the battery does not need to be cooled or heated;

[0156] S04AA: when the cab air conditioner is in fresh air mode, each component performs initial state control;

[0157] S04AB: when the cab air conditioner is in cooling mode, the processor 108 controls the on-off valve to open and controls the heat dissipation fan 102 to work, and the remaining components are in the initial state;

[0158] S04AC: when the cab air conditioner is in heating mode, the processor 108 controls the heating water pump to work, and the remaining components are in the initial state;

[0159] S04B: when the battery is in heating mode;

[0160] S04B: when the cab air conditioner is in fresh air mode, the processor 108 controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the motor heating water heater circuit, and the remaining components are in the initial state;

[0161] S04BB: when the cab air conditioner is in cooling mode, the processor 108 controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the motor heating water heater circuit, controls the on-off valve to open, controls the heat dissipation fan 102 to work, and the remaining components are in the initial state;

[0162] S04BC: when the cab air conditioner is in heating mode, the processor 108 controls the battery water pump to work, controls the inlet three-way reversing valve and the outlet three-way reversing valve to switch to the motor heating water heater circuit, controls the heating water pump to work, and the remaining components are in the initial state;

[0163] S04C: when the battery is in cooling mode;

[0164] S04CA: When the cab air conditioner is in fresh air mode, the processing device 108 controls the battery water pump to work, controls the water inlet end three-way reversing valve and the water outlet end three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan 102 to work, and the remaining components are in the initial state;

[0165] S04CB: When the cab air conditioner is in cooling mode, the processing device 108 controls the battery water pump to work, controls the water inlet end three-way reversing valve and the water outlet end three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan 102 to work, controls the on-off valve to open, and the remaining components are in the initial state;

[0166] S04CC: When the cab air conditioner is in heating mode, the processing device 108 controls the battery water pump to work, controls the water inlet end three-way reversing valve and the water outlet end three-way reversing valve to switch to the water-fluorine heat exchanger circuit, controls the cooling fan 102 to work, controls the heating water pump to open, and the remaining components are in the initial state;

[0167] S05: When the battery water pump, the heating water pump, the cooling fan 102, and the electronic expansion valve work, the processing device 108 respectively executes the control of the components according to the following logic;

[0168] S0501: The processing device 108 obtains the target speed of the battery water pump according to the current temperature Tbp of the battery, the low threshold value Ttl of the target temperature of the battery, and the high threshold value Tth of the target temperature of the battery, and looks up the table MAP(MAX(|Tbp-Ttl|, |Tbp-Tth|)). The battery water pump receives a control instruction and responds to the target speed control;

[0169] S0502: The processing device 108 obtains the target speed of the heating water pump according to the target temperature Ttcab of the cab and the real-time temperature Tcab of the cab, and looks up the table MAP(Ttcab-Tcab). The heating water pump receives a control instruction and responds to the target speed control;

[0170] S0503: The processing device 108 obtains the initial speed Nfanraw of the cooling fan 102 according to the high-pressure side pressure Prsh of the evaporator and looks up the table MAP(Prsh), and obtains the correction coefficient Kfan of the speed of the cooling fan 102 according to the speed Ncmp of the compressor and looks up the table MAP(Ncmp), so as to obtain the target speed Nfan of the cooling fan 102;

[0171] S0504: The processor 108 obtains the saturated temperature Trfgf of the refrigerant according to the low-pressure side refrigerant pressure Prsl look-up table MAP(Prsl), and obtains the initial opening degree Ohvraw of the electronic expansion valve by combining the low-pressure side refrigerant temperature Trfgl look-up table MAP(Trfgl-Trfgf).

[0172] As the working cycle, the refrigerant cycle 1 of the water-fluorine heat exchanger is introduced: compressor→condenser→electronic expansion valve A→water-fluorine heat exchanger→compressor. This cycle can realize refrigeration of the refrigerant in the water-fluorine heat exchanger, so as to cool the cooling liquid flowing through the water-fluorine heat exchanger;

[0173] The refrigerant cycle 2 of the cab is introduced: compressor→condenser→on-off valve→electronic expansion valve B→evaporator→compressor. This cycle can realize refrigeration of the refrigerant in the evaporator, and the evaporator is located in the cab, which cooperates with the cab air conditioner fan to realize air refrigeration in the cab.

[0174] The cooling liquid cycle of the battery cooling process is introduced: battery water outlet→electronic water pump→inlet three-way reversing valve→water-fluorine heat exchanger→outlet three-way reversing valve→battery water inlet→battery, multi-in-one→battery water outlet. Under this cycle, the water-fluorine heat exchanger reduces the temperature of the cooling liquid, and the battery, multi-in-one and other components are cooled through this cycle.

[0175] The cooling liquid cycle of the battery heating process is introduced: battery water outlet→electronic water pump→inlet three-way reversing valve→electrical heating water heater→outlet three-way reversing valve→battery water inlet→battery, multi-in-one→battery water outlet. Under this cycle, the electrical heating water heater increases the temperature of the cooling liquid, and the battery, multi-in-one and other components are heated through this cycle.

[0176] The cooling liquid cycle of the cab heating is introduced: heating water pump→heating water outlet→cab heating box→electrical heating water heater→heating water pump. Under this cycle, the electrical heating water heater increases the temperature of the cooling liquid, and the cab heating box cooperates with the cab air conditioner fan to realize air heating in the cab.

[0177] The present application is fully described in order to more clearly disclose, and the prior art is not listed one by one.

[0178] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some of the technical features can be replaced by equivalents; it is obvious for those skilled in the art to combine the technical solutions of the present application. The essence of the corresponding technical solution does not deviate from the spirit and scope of the technical solutions of the embodiments of the present application. The technical content not described in detail in the present application is known technology.

Claims

1. An integrated vehicle thermal management system, characterized in that: Includes a structural housing (109); a processing device (108) is provided on the structural housing (109); the processing device (108) is electrically connected to a sensor unit and an execution unit; The execution unit includes a circulating water circuit unit and a circulating refrigerant unit; A water-fluorine heat exchanger (105) is installed between the circulating water unit and the circulating refrigerant unit for heat exchange. The circulating water circuit unit includes an electric heating water heater (104), a warm air water pump (106), a battery-powered water pump (107), an inlet three-way reversing valve (201), and an outlet three-way reversing valve (202). Battery water inlet pipe (401), battery water inlet tee to electric heating water pipe (402), battery water inlet tee to water-fluoride heat exchanger pipe (403), battery water outlet pipe (404), battery water outlet tee to electric heating water pipe (405), battery water outlet tee to water-fluoride heat exchanger pipe (406), cab heater water outlet pipe (407), cab heater water inlet pipe (408); One end of the battery outlet pipe (404) is connected to the V1 port of the inlet three-way reversing valve (201), and the other end is connected to the outlet of the battery (112) matched with the system; one end of the battery inlet pipe (401) is connected to the V1 port of the outlet three-way reversing valve (202), and the other end is connected to the inlet of the battery (112) matched with the system. The V2 and V3 ports of the inlet three-way reversing valve (201) are connected to the electric heating water pipe (402) and the water-fluoride heat exchanger pipe (403) respectively through the battery inlet three-way valve, and are connected to the electric heating water pipe (104) and the water-fluoride heat exchanger (105). The V2 and V3 ports of the outlet three-way reversing valve (202) are connected to the electric heating water pipe (405) and the water-fluoride heat exchanger pipe (406) respectively through the battery outlet three-way valve; the inlet three-way reversing valve (201) and the outlet three-way reversing valve (202) are both two-position three-way valves. The refrigerant circulation unit includes a condenser (101), a compressor (103), an on / off valve (204), and an electronic expansion valve. The refrigerant pipe from the compressor to the condenser (501), the refrigerant pipe from the condenser to the expansion valve (502), the condenser pipe from the condenser to the evaporator (503), the refrigerant pipe from the water-fluorine heat exchanger to the compressor (504), and the refrigerant pipe from the evaporator to the compressor (505). The electronic expansion valve includes electronic expansion valve A (203) and electronic expansion valve B (205); The condenser (101) is equipped with a cooling fan (102); The outlet end of the compressor (103) is connected to the condenser (101) via the compressor-to-condenser refrigerant pipe (501); the condenser (101) is connected to the electronic expansion valve A (203) via the condenser-to-expansion valve refrigerant pipe (502); the on / off valve (204) is connected in series on the condenser-to-evaporator condenser pipe (503); one end of the condenser-to-evaporator condenser pipe (503) is connected to the condenser (101), and the other end is connected to the high-pressure side of the evaporator (111) in the cab matched with the system; the electronic expansion valve A (203) is connected to the water-fluorine heat exchanger (105); the water-fluorine heat exchanger-to-compressor refrigerant pipe (504) connects the water-fluorine heat exchanger (105) to the air inlet of the compressor (103); one end of the evaporator-to-compressor refrigerant pipe (505) is connected to the air inlet of the compressor (103), and the other end is connected to the low-pressure side of the evaporator (111) in the cab matched with the system: The sensor unit includes a high-pressure side sensor (301) of the water-fluoride heat exchanger, a low-pressure side sensor (302) of the water-fluoride heat exchanger, a battery outlet sensor B (303) of the battery inlet sensor A (304) of the heater outlet sensor (305) of the heater, a high-pressure side sensor (306) of the evaporator, a low-pressure side pressure and temperature sensor (307) of the evaporator, an ambient temperature sensor (308) of the ambient temperature sensor, and a cab sensor (309). The high-pressure side sensor (301) of the water-fluorine heat exchanger is installed on the refrigerant pipe (502) from the condenser to the expansion valve; A low-pressure side sensor (302) for the water-fluorine heat exchanger is installed on the refrigerant pipe (504) from the water-fluorine heat exchanger to the compressor. Battery outlet sensor B (303) is installed on battery outlet pipe (404); Battery inlet sensor A (304) is installed on battery inlet pipe (401); A heater outlet sensor (305) is installed on the heater inlet pipe (408) in the cab; The high-pressure side sensor (306) of the evaporator is installed on the condenser-evaporator condenser tube (503); The low-pressure side pressure and temperature sensor (307) of the evaporator is installed on the refrigerant pipe (505) from the evaporator to the compressor; An ambient temperature sensor (308) is located on one side of the condenser (101); The cab sensor (309) is installed in the cab.

2. The integrated vehicle thermal management system according to claim 1, characterized in that: The processing device (108) adopts an MCU or PLC controller; the MCU or PLC controller is electrically connected to a driver, and the driver is electrically connected to the corresponding execution unit; The processing device (108) receives the acquired signals from the sensor and controls the operation of the execution unit; The processing device (108) is connected to the matched vehicle-related control unit via a communication line; When the data collected by the sensor exceeds the set threshold, the PLC controller controls the execution unit by turning on or off the corresponding driver through a comparator circuit switch, a transistor switch, or a MOSFET switch.

3. A control method for an integrated vehicle thermal management system, characterized in that: Based on the system described in claim 1; Control methods Includes the following steps; S01: The processing device (108) obtains the heating power coefficient Pbph or cooling power coefficient Pbpc required by the battery based on the current temperature Tbp of the battery (112), the low threshold of the target temperature Ttl of the battery, the high threshold of the target temperature Tth of the battery, and the outlet temperature Tbpout of the battery. S02: The processing device (108) obtains the heating power coefficient Pcabh or cooling power coefficient Pcabc required for the cab based on the cab air conditioning mode, the real-time temperature of the cab, and the target temperature of the cab. S03: First, the processing device (108) obtains the power coefficient of the compressor (103); then, when the power coefficient is not 0, the processing device (108) outputs a preset target speed to the compressor (103), and the compressor (103) responds to the target speed; second, the processing device (108) obtains the power coefficient of the electric heating water heater (104), and when the power coefficient is not 0, outputs the target power to the electric heating water heater, and the electric heating water heater responds to the target power; S04: The processing device (108) controls the on / off valve (204), electronic expansion valve, three-way valve, warm air pump, battery water pump (107) and cooling fan (102) through the driver based on the battery (112) heating or cooling mode and the cab air conditioning mode. S05: When the battery water pump, the heater water pump, the cooling fan (102), and the electronic expansion valve are working, the processing device (108) controls the functions and performance of the battery water pump, the heater water pump, the cooling fan (102), and the electronic expansion valve respectively.

4. The control method for the integrated vehicle thermal management system according to claim 3, characterized in that: The processing device (108) acquires the status information of the compressor in real time, and the compressor receives the control information from the processing device (108) and executes the control response; The compressor status information includes compressor speed, compressor voltage, compressor current, and compressor fault status; The control information received by the compressor includes compressor enable and compressor target speed; The processing device (108) controls the opening degree of the electronic expansion valve, and the opening degree control signal type includes PWM signal, LIN bus or CAN bus.

5. The control method for the integrated vehicle thermal management system according to claim 4, characterized in that: The processing device (108) controls the speed of the cooling fan (102), and the speed control signal type includes PWM signal, LIN bus or CAN bus; The processing device (108) controls the opening and closing of the on / off valve; The processing device (108) acquires the status information of the electric heating water heater in real time, and the electric heating water heater receives the control information of the processing device (108) in real time and executes control actions. The status information of the electric water heater includes the outlet temperature, electric water heater voltage, real-time operating current, and fault information.

6. The control method for the integrated vehicle thermal management system according to claim 5, characterized in that: The processing device (108) controls the rotation speed of the warm air water pump and the battery water pump; The processing device (108) controls the valve position switching of the inlet three-way reversing valve and the outlet three-way reversing valve; The processing device (108) switches positions with the inlet three-way reversing valve and the outlet three-way reversing valve via LIN communication or power drive. The processing device (108) collects information values ​​in real time from the high-pressure side sensor of the water-fluorine heat exchanger, the low-pressure side sensor of the water-fluorine heat exchanger, the battery inlet sensor A, the battery outlet sensor B, the heater outlet sensor, the high-pressure side sensor of the evaporator, the low-pressure side pressure and temperature sensor of the evaporator, the ambient temperature sensor, and the cab sensor. The processing device (108) receives control commands from the vehicle, including target temperature of the cab, heating and cooling mode of the cab, current battery temperature, low threshold of target battery temperature, and high threshold of target battery temperature; the processing device (108) controls the execution components based on the control commands of the vehicle.

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