Integrated vehicle thermal management system and control method thereof

Abstract

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

Description

Technical Field

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

[0002] Pure electric vehicles are vehicles that use an onboard power source as a power source and use an electric motor to drive the wheels. Unlike traditional internal combustion vehicles, pure electric vehicles do not have internal combustion gas, and batteries are added accordingly. As an onboard energy storage system, the battery provides electrical energy for the power motor drive and can also store the electrical energy fed back from the power motor. The cab heating of traditional internal combustion engine vehicles usually uses engine waste heat, that is, the engine coolant is introduced into the cab water heating box, and the air conditioning fan provides warm air for the driver; the cab cooling uses the engine-mounted mechanical air conditioning compressor to provide low-temperature refrigerant to the evaporator box, and the air conditioning fan provides cold air to the cab.

[0003] Compared with traditional internal combustion engine vehicles, pure electric vehicles have no engine, and their cab heaters have no hot water source. At the same time, the mechanical air conditioning compressor has no power source, and the traditional cab cooling and heating system cannot be used. At the same time, the optimal operating temperature of the battery is in the range of 20-30℃. Affected by the ambient temperature, the temperature rise of its own charging and discharging, etc., the battery temperature may be lower than the optimal operating temperature, and the battery needs to be heated or cooled. Conventional pure electric vehicles use PTC heaters for cab heating and electric air conditioning compressors for cab cooling; the battery is usually cooled by natural cooling, forced liquid cooling or separate air conditioning compressor cooling, and heated by built-in PTC heating film. Under the conventional scheme, the PTC heater is directly used in the cab, which is affected by the specific heat capacity of air and has poor heating uniformity. At the same time, it is relatively unsafe to arrange high-voltage wires in the cab. The reliability of conventional PTC heating films for battery heating is relatively poor and the heating temperature difference is large; natural cooling, forced liquid cooling or separate air conditioning compressor cooling are prone to low cooling efficiency and high system cost. Summary of the invention

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

[0005] To solve the above problems, the technical solution adopted by the present invention is:

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

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

[0008] A water-fluorine heat exchanger is provided between the circulating water unit and the circulating refrigerant unit for heat exchange.

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

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

[0011] Battery water inlet pipe, battery water inlet tee to electric heating water heating pipe, battery water inlet tee to water-fluorine heat exchanger pipe, battery water outlet pipe, battery water outlet tee to electric heating water heating pipe, battery water outlet tee to water-fluorine heat exchanger pipe, cab heater outlet pipe, cab heater inlet pipe;

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

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

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

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

[0016] Refrigerant pipe from compressor to condenser, refrigerant pipe from condenser to expansion valve, condenser to evaporator condenser pipe, refrigerant pipe from water-fluorine heat exchanger to compressor, and refrigerant pipe from evaporator to compressor;

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

[0018] The condenser is equipped with a cooling fan;

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

[0020] The sensor unit includes 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 and temperature sensor, an ambient temperature sensor, and a cab sensor;

[0021] The high-pressure side sensor of the water-fluorine heat exchanger is installed on the refrigerant pipe from the condenser to the expansion valve;

[0022] The low-pressure side sensor of the water-fluorine heat exchanger is installed on the refrigerant pipe from the water-fluorine heat exchanger to the compressor;

[0023] Battery water outlet sensor B, arranged on the battery water outlet pipe;

[0024] Battery water outlet sensor B, set on the battery water inlet pipe;

[0025] The warm air outlet sensor is installed on the warm air inlet pipe in the cab;

[0026] The evaporator high-pressure side sensor is arranged on the condenser tube from the condenser to the evaporator;

[0027] The evaporator low-pressure side pressure temperature sensor is installed on the refrigerant pipe from the evaporator to the compressor;

[0028] An 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 to a driver, and the driver is electrically connected to a corresponding execution unit;

[0031] The processing device receives the collected signal of the sensor and controls the action of the execution unit;

[0032] The processing device is connected to the matched vehicle-related control unit via a communication line;

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

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

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

[0036] S02: The processing device obtains a heating power coefficient Pcabh or a cooling power coefficient Pcabc required for the cab based on the cab air conditioning mode, the cab real-time temperature, and the cab target temperature;

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

[0038] S04: The processing device 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 processing device 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 processing device acquires the status information of the compressor in real time, and the compressor receives the control information of the processing device and executes a control response;

[0042] The compressor status information includes compressor speed, compressor voltage, compressor current, and compressor fault status;

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

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

[0045] The processing device controls the speed of the cooling fan, and the 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 status information of the electric water heater in real time, and the electric water heater receives the control information of the processing device in real time and executes the control action;

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

[0049] The processing device controls the rotation speed of the heater water pump and the battery water pump;

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

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

[0052] The processing device collects 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 warm air outlet sensor, the evaporator high-pressure side sensor, the evaporator low-pressure side pressure and temperature sensor, the ambient temperature sensor, and the cab sensor in real time;

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

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

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

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

[0057] S01C: When the current battery temperature Tbp is greater than the battery target temperature threshold Tth, the processing device looks up the table MAP (Tth-Tbp) to obtain the basic cooling power coefficient Pbpcraw of the compressor, and looks up the table MAP (Tbpout) through the battery outlet temperature Tbpout to obtain the compressor cooling power correction coefficient Kbpcr, and calculates the power coefficient required for battery cooling 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, Pcabh = Pcabc = 0;

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

[0061] Among them, MAP table and table lookup are commonly used control data association or acquisition methods for calculation or control; MAP table is a data structure for storing key-value pairs, and two-dimensional table is the simplest MAP table. Two-dimensional table stores two groups of data, one group is input data, and the other group is output structure. For example, one group of data is input value, which is 1, 2, 3, 4, 5, and the other group of data is 2, 4, 6, 8, 10 as output value. When input 1, the table lookup can obtain value 2, and when input 3, the table lookup can obtain value 6. The process of data within the group in the MAP table is the process of data calibration.

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

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

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

[0065] S03B: The power coefficient of the electric water heating is Ph = Max (Pcabh, Pbph), and the target power of the electric water heating 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 fresh air mode, each component executes the initial state control;

[0069] S04AB: When the cab air conditioner is in cooling mode, the processing device controls the on-off valve to open and the cooling fan to work, and the other components are in the initial state;

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

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

[0072] S04BA: When the cab air conditioner is in fresh air mode, the processing device 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 heating circuit, and the other components are in the initial state:

[0073] S04BB: When the cab air conditioner is in cooling mode, the processing device 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 heating circuit, controls the on-off valve to open, controls the cooling fan to work, and the other 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 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 heating circuit, controls the heater water pump to work, and the other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, and the other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, controls the on-off valve to open, and the other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the water-fluorine heat exchanger circuit, controls the cooling fan to work, controls the heater water pump to start, and the other 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 battery target temperature low threshold Ttl, and the battery target temperature high threshold Tth to obtain the target speed of the battery water pump. The battery water pump receives the 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 cab real-time temperature Tcab to obtain the target speed of the heater water pump. The heater water pump receives the control command and responds to the target speed control:

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

[0083] S0504: The processing device obtains the saturation temperature Trfgf of the refrigerant according to the refrigerant pressure Prsl on the low-pressure side of the evaporator by looking up the table MAP (Prsl), and obtains the initial opening of the electronic expansion valve Ohvraw by combining the low-pressure side refrigerant temperature Trfgl with the table MAP (Trfgl-Trfgf); obtains the electronic expansion valve opening correction coefficient Khvr by looking up the table MAP (Prsh) of the high-pressure side refrigerant pressure Prsh, and calculates the electronic expansion valve opening value Ohv=Ohvraw*Khvr.

[0084] The present invention uses a single, integrated, modular unit to achieve cab heating and cooling regulation and battery bidirectional temperature regulation. It has the advantages of low cost, good processability, high integration, flexible control, etc.

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

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

[0087] like Figure 1 , an integrated vehicle thermal management system, comprising a structural box; a processing device is arranged on the structural box; the processing device is electrically connected to a sensor unit, and the processing device is electrically connected to 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 provided between the circulating water unit and the circulating refrigerant unit for heat exchange.

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

[0091] The circulating water circuit unit includes electric heating water heater, warm air water pump, battery water pump, three-way reversing valve at the water inlet end, three-way reversing valve at the water outlet end,

[0092] Battery water inlet pipe, battery water inlet tee to electric heating water heating pipe, battery water inlet tee to water-fluorine heat exchanger pipe, battery water outlet pipe, battery water outlet tee to electric heating water heating pipe, battery water outlet tee to water-fluorine heat exchanger pipe, cab heater outlet pipe, cab heater inlet pipe;

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

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

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

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

[0097] Refrigerant pipe from compressor to condenser, refrigerant pipe from condenser to expansion valve, condenser to evaporator condenser pipe, refrigerant pipe from water-fluorine heat exchanger to compressor, and refrigerant pipe from evaporator to compressor;

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

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

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

[0101] The sensor unit includes 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 and temperature sensor, an ambient temperature sensor, and a cab sensor;

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

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

[0104] Battery water outlet sensor B, arranged on the battery water outlet pipe;

[0105] Battery water outlet sensor B, set on the battery water inlet pipe;

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

[0107] The evaporator high-pressure side sensor is arranged on the condenser tube from the condenser to the evaporator;

[0108] The evaporator low-pressure side pressure temperature sensor is installed on the refrigerant pipe from the evaporator to the compressor;

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

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

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

[0112] The processing device receives the collected signal of the sensor and controls the action of the execution unit;

[0113] The processing device is connected to the matched vehicle-related control unit via a communication line;

[0114] When the data collected by the sensor is greater than the set threshold, the PLC controller controls the execution unit by turning on or off the corresponding driver through the comparator circuit switch, transistor switch or MOS tube switch.

[0115] like Figure 1 , the integrated vehicle thermal management system described in the present invention, wherein,

[0116] The outlet end of the compressor 103 is connected to the condenser 101 through the compressor-to-condenser refrigerant pipe 501; the condenser 101 is connected to the electronic expansion valve A203 through the condenser-to-expansion valve refrigerant pipe 502; the on-off valve 204 is connected in series to 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 cab evaporator 111 matched by the system;

[0117] The electronic expansion valve 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 and 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 cab evaporator 111 matched by the system;

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

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

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

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

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

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

[0124] The warm air outlet sensor 305 is connected in series to the cab warm air outlet pipe 407;

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

[0126] The processing device 108 is connected to the matched vehicle-related control unit via a communication line;

[0127] The processing device 108 is connected with the compressor 101, the cooling fan 102), the electronic expansion valve 203, the on-off valve 204, the electric heating water heater 104, the water inlet three-way reversing valve 201, the water outlet three-way reversing valve 202, the warm air water pump 106, and the battery water pump 107 to realize the control 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 B303, the battery water outlet sensor B304, the warm air water outlet sensor 305, the evaporator high-pressure side sensor 306, the evaporator low-pressure side pressure and temperature sensor 307, and the ambient temperature sensor 308 through a wiring harness;

[0128] The structural box 109 envelops the above-mentioned components, wherein the battery water inlet pipe 401, the battery water outlet pipe 404, the cab heater outlet pipe 407, the cab heater inlet pipe 408, the compressor to condenser refrigerant pipe 501, the condenser to evaporator condenser pipe 503, and the evaporator to compressor refrigerant pipe 505 have water channels, refrigerant and other pipe joints connected to the matching vehicle evaporator, condenser, and battery on the structural box 109.

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

[0130] The processing device 108 acquires the status information of the compressor in real time, and the compressor receives the control information of the processing device 108 and executes a control response;

[0131] Further, the compressor status information includes compressor speed, compressor voltage, compressor current, and compressor fault status;

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

[0133] The processing device 108 controls the opening of the electronic expansion valve, and the opening control signal type includes a PWM signal, a LIN bus, and a CAN bus;

[0134] The processing device 108 controls the speed of the cooling fan 102), and the speed control signal type includes a PWM signal, a LIN bus, and a CAN bus;

[0135] The processing device 108 controls the opening and closing of the on-off valve;

[0136] The processing device 108 acquires the status information of the electric water heater in real time, and the electric water heater receives the control information of the processing device 108 in real time and executes the control action;

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

[0138] The processing device 108 controls the rotation speed of the heater water pump and the battery water pump;

[0139] The processing device 108 controls the valve position switching of the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end;

[0140] Furthermore, the processing device 108 and the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end realize position switching through LIN communication or power drive;

[0141] The processing device 108 collects 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 warm air outlet sensor, the evaporator high-pressure side sensor, the evaporator low-pressure side pressure and temperature sensor, the ambient temperature sensor, and the cab sensor in real time.

[0142] The processing device 108 receives control instructions from the vehicle, including the target temperature of the cab, the heating and cooling mode of the cab, the current temperature of the battery, the low threshold of the target temperature of the battery, and the high threshold of the target temperature of the battery; the processing device 108 controls the execution component based on the above control instructions;

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

[0144] S01A: When the current battery temperature Tbp is lower than the battery target temperature low threshold value Ttl, the processing device (108) looks up the table MAP (Ttl-Tbp) to obtain the basic power coefficient Pbphraw of the electric heating water heater, and looks up the table MAP (Tbpout) according to the battery 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 = Pbphraw*Kbphr; at this time, the power coefficient Pbpc required for battery cooling = 0;

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

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

[0147] S02: The processing device 108 obtains the heating power coefficient Pcabh or the cooling 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, 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 current cab temperature Tcab and the cab target temperature Ttcab, obtains the basic power coefficient Pcabhraw of the electric heating water heater, and looks up the table MAP (Tcabout) according to the warm air outlet temperature Tcabout, obtains the power correction coefficient Kcabhr of the electric heating water heater, and calculates the power coefficient Pcabh=Pcabhraw*Kcabhr required for cab heating; at this time, the power coefficient Pcabc required for cab cooling=0;

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

[0151] S03: The processing device 108 obtains the power coefficient of the compressor. When the power coefficient is not 0, the target speed is output 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, the target power is output 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), and the target speed of the compressor is obtained through MAP (Pc);

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

[0154] S04: The processing device 108 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 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 executes the initial state control;

[0157] S04AB: When the cab air conditioner is in cooling mode, the processing device 108 controls the on-off valve to open, controls the cooling fan 102 to work, and the other components are in the initial state;

[0158] S04AC: When the cab air conditioner is in heating mode, the processing device 108 controls the heater water pump to work, and the other 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 processing device 108 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 heating circuit, and the other components are in the initial state;

[0161] S04BB: When the cab air conditioner is in cooling mode, the processing device 108 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 heating circuit, controls the on-off valve to open, controls the cooling fan 102 to work, and the other components are in the initial state;

[0162] S04BC: When the cab air conditioner is in heating mode, the processing device 108 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 heating circuit, controls the heating water pump to work, and the other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the water-fluorine heat exchanger circuit, controls the cooling fan 102 to work, and the other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end 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 other 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 three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end to switch to the water-fluorine heat exchanger circuit, controls the cooling fan 102 to work, controls the heater water pump to start, and the other components are in the initial state;

[0167] 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 components according to the following logic execution respectively;

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

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

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

[0171] S0504: The processing device 108 obtains the saturation temperature Trfgf of the refrigerant according to the refrigerant pressure Prsl on the low-pressure side of the evaporator by looking up the table MAP (Prsl), and obtains the initial opening of the electronic expansion valve Ohvraw by combining the low-pressure side refrigerant temperature Trfgl with the table MAP (Trfgl-Trfgf); obtains the electronic expansion valve opening correction coefficient Khvr by looking up the table MAP (Prsh) of the high-pressure side refrigerant pressure Prsh, and calculates the electronic expansion valve opening value Ohv=Ohvraw*Khvr.

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

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

[0174] Coolant circulation in the battery cooling process: battery water outlet → electronic water pump → three-way reversing valve at the water inlet → water-fluorine heat exchanger → three-way reversing valve at the water outlet → battery water inlet → battery, all-in-one → battery water outlet. In this cycle, the water-fluorine heat exchanger reduces the coolant temperature, and the battery, all-in-one and other components are cooled through this cycle.

[0175] Coolant circulation during battery heating process: battery water outlet → electronic water pump → three-way reversing valve at water inlet → electric heating water heater → three-way reversing valve at water outlet → battery water inlet → battery, all-in-one → battery water outlet. In this cycle, the electric heating water heater increases the coolant temperature, and the battery, all-in-one and other components are heated through this cycle.

[0176] The coolant circulation for cab heating is: heater water pump → heater outlet → cab heater box → electric heater → heater water pump. Under this circulation, the electric heater will increase the coolant temperature, and the cab heater box cooperates with the cab air conditioning fan to heat the air in the cab.

[0177] The present invention is fully described for a clearer disclosure, and the prior art is not listed one by one.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. An integrated vehicle thermal management system, characterized in that: It comprises a structural box (109); a processing device (108) is arranged on the structural box (109); the processing device (108) is electrically connected to the sensor unit, and the processing device (108) is electrically connected to the execution unit; The execution unit includes a circulating water circuit unit and a circulating refrigerant unit; A water-fluorine heat exchanger (105) is provided between the circulating water unit and the circulating refrigerant unit for heat exchange.

2. The integrated vehicle thermal management system according to claim 1, characterized in that: The circulating water circuit unit includes an electric heating water heater (104), a warm air water pump (106), a battery water pump (107), a three-way reversing valve (201) at the water inlet end, a three-way reversing valve (202) at the water outlet end, Battery water inlet pipe (401), battery water inlet tee to electric heating water heating pipe (402), battery water inlet tee to water-fluorine heat exchanger pipe (403), battery water outlet pipe (404), battery water outlet tee to electric heating water heating pipe (405), battery water outlet tee to water-fluorine heat exchanger pipe (406), cab warm air outlet pipe (407), cab warm air inlet pipe (408); One end of the battery water outlet pipe (404) is connected to the V1 port of the three-way reversing valve (201) at the water inlet end, and the other end is connected to the water outlet of the battery 112 matched with the system; one end of the battery water inlet pipe (401) is connected to the V1 port of the three-way reversing valve (202) at the water outlet end, and the other end is connected to the water inlet of the battery 112 matched with the system; The V2 port and the V3 port of the three-way reversing valve (201) at the water inlet end are respectively connected to the electric heating water heater (104) and the water-fluorine heat exchanger (105) through the battery water inlet tee to the electric heating water heater pipe (402) and the battery water inlet tee to the water-fluorine heat exchanger pipe (403); The V2 port and the V3 port of the three-way reversing valve (202) at the water outlet are respectively connected to the electric heating water heater (104) and the water-fluorine heat exchanger (105) through the battery water outlet tee to the electric heating water heater pipe (405) and the battery water outlet tee to the water-fluorine heat exchanger pipe (406); the three-way reversing valve (201) at the water inlet end and the three-way reversing valve (202) at the water outlet end are both two-position three-way valves.

3. The integrated vehicle thermal management system according to claim 1, characterized in that: The circulating refrigerant unit includes a condenser (101), a compressor (103), an on-off valve (204), an electronic expansion valve, A refrigerant pipe (501) from the compressor to the condenser, a refrigerant pipe (502) from the condenser to the expansion valve, a condenser pipe (503) from the condenser to the evaporator, a refrigerant pipe (504) from the water-fluorine heat exchanger to the compressor, and a refrigerant pipe (505) from the evaporator to the compressor; The electronic expansion valve comprises an electronic expansion valve A (203) and an 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) through the compressor-to-condenser refrigerant pipe (501); the condenser (101) is connected to the electronic expansion valve A (203) through the condenser-to-expansion valve refrigerant pipe (502); the on-off valve (204) is connected in series to 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 of the cab matched by 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) and 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 cab evaporator (111) matched by the system.

4. The integrated vehicle thermal management system according to claim 1, characterized in that: The sensor unit includes a water-fluorine heat exchanger high-pressure side sensor (301), a water-fluorine heat exchanger low-pressure side sensor (302), a battery water outlet sensor B (303), a battery water outlet sensor B (304), a warm air outlet sensor (305), an evaporator high-pressure side sensor (306), an evaporator low-pressure side pressure and temperature sensor (307), an ambient temperature sensor (308), and a cab sensor (309); A water-fluorine heat exchanger high-pressure side sensor (301) is arranged on a refrigerant pipe (502) from the condenser to the expansion valve; A water-fluorine heat exchanger low-pressure side sensor (302), arranged on a refrigerant pipe (504) from the water-fluorine heat exchanger to the compressor; A battery water outlet sensor B (303), arranged on the battery water outlet pipe (404); A battery water outlet sensor B (304), arranged on the battery water inlet pipe (401); A warm air outlet sensor (305) is arranged on a warm air inlet pipe (408) of the cab; An evaporator high pressure side sensor (306), arranged on a condenser to evaporator condensation tube (503); The evaporator low-pressure side pressure temperature sensor (307) is arranged on the evaporator-compressor refrigerant pipe (505); An ambient temperature sensor (308) is disposed on one side of the condenser (101); The cab sensor (309) is arranged in the cab.

5. The integrated vehicle thermal management system according to claim 1, characterized in that: The processing device (108) adopts an MCU or a PLC controller; the MCU or the PLC controller is electrically connected to a driver, and the driver is electrically connected to a corresponding execution unit; The processing device (108) receives the collected signal of the sensor to control the action 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 is greater than the set threshold, the PLC controller controls the execution unit by turning on or off the corresponding driver through the comparator circuit switch, transistor switch or MOS tube switch.

6. A control method for an integrated vehicle thermal management system, characterized in that: The control method comprises the following steps; S01: The processing device (108) obtains the heating power coefficient Pbph or the cooling power coefficient Pbpc required by the battery based on the current temperature Tbp of the battery (112), the battery target temperature low threshold Ttl, the battery target temperature high threshold Tth, and the battery outlet temperature Tbpout; S02: The processing device (108) obtains a heating power coefficient Pcabh or a cooling power coefficient Pcabc required for the cab based on the cab air conditioning mode, the cab real-time temperature, and the cab target temperature; 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; secondly, 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), the electronic expansion valve, the three-way valve, the heater water pump, the battery water pump (107) and the 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 performances of the battery water pump, the heater water pump, the cooling fan (102), and the electronic expansion valve respectively.

7. The control method of the integrated vehicle thermal management system according to claim 6, characterized in that: The processing device (108) acquires status information of the compressor in real time, and the compressor receives control information of the processing device (108) and executes a 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 of the electronic expansion valve, and the opening control signal type includes a PWM signal, a LIN bus or a CAN bus.

8. The control method of the integrated vehicle thermal management system according to claim 7, characterized in that: The processing device (108) controls the rotation speed of the cooling fan (102), and the rotation speed control signal type includes a PWM signal, a LIN bus or a 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 water heater in real time, and the electric water heater receives the control information of the processing device (108) in real time and executes the control action; The status information of the electric water heater includes water outlet temperature, electric water heater voltage, real-time working current, and fault information.

9. The control method of the integrated vehicle thermal management system according to claim 8, characterized in that: The processing device (108) controls the rotation speed of the heater water pump and the battery water pump; The processing device (108) controls the valve position switching of the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end; The processing device (108) and the three-way reversing valve at the water inlet end and the three-way reversing valve at the water outlet end realize position switching through LIN communication or power drive; The processing device (108) collects 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 warm air outlet sensor, the evaporator high-pressure side sensor, the evaporator low-pressure side pressure and temperature sensor, the ambient temperature sensor, and the cab sensor in real time; The processing device (108) receives control instructions from the whole vehicle, including the target temperature of the cab, the heating and cooling mode of the cab, the current temperature of the battery, the low threshold of the target temperature of the battery, and the high threshold of the target temperature of the battery; the processing device (108) controls the execution component based on the control instructions of the whole vehicle.

10. The control method of the integrated vehicle thermal management system according to claim 7, characterized in that: In S01, the following steps are performed: S01A: When the current battery temperature Tbp is lower than the battery target temperature low threshold value Ttl, the processing device (108) looks up the table MAP (Ttl-Tbp) to obtain the basic power coefficient Pbphraw of the electric heating water heater, and looks up the table MAP (Tbpout) according to the battery 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 = Pbphraw*Kbphr; at this time, the power coefficient Pbpc required for battery cooling = 0; S01B: When the current battery temperature Tbp is greater than the battery target temperature low threshold Ttl and less than the battery target temperature threshold Tth, the battery has no heating or cooling requirement; The required heating power coefficient and cooling power coefficient are both Pbph=Pbpc=0: S01 C: When the current battery temperature Tbp is greater than the battery target temperature threshold value Tth, the processing device (108) looks up the table MAP (Tth-Tbp) to obtain the basic cooling power coefficient Pbpcraw of the compressor, and looks up the table MAP (Tbpout) through the battery outlet temperature Tbpout to obtain the compressor cooling power correction coefficient Kbpcr, and calculates the power coefficient Pbpc=Pbpcraw*Kbpcr required for battery cooling; at this time, the power coefficient Pbph required for battery heating=0; In S02, the following steps are performed: S02A: When the cab air conditioner is in fresh air mode, Pcabh = Pcabc = 0; S02B: When the cab air conditioner is in heating mode, the processing device (108) looks up the table MAP (Tcab-Ttcab) according to the current cab temperature Tcab and the cab target temperature Ttcab, obtains the basic power coefficient Pcabhraw of the electric heating water heater, looks up the table MAP (Tcabout) according to the warm air outlet temperature Tcabout, obtains the power correction coefficient Kcabhr of the electric heating water heater, and calculates the power coefficient Pcabh=Pcabhraw*Kcabhr required for cab heating; at this time, the power coefficient Pcabc required for cab cooling=0; S02C: When the cab air conditioner is in cooling mode, the processing device (108) looks up the table MAP (Tcab-Ttcab) according to the current cab temperature Tcab and the cab target temperature Ttcab, obtains 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, obtains the power correction coefficient Kcabrcr of the compressor, and calculates the power coefficient Pcabc=Pcabcraw*Kcabcr required for cab cooling; at this time, the power coefficient Pcabh required for cab heating=0; In S03, the following steps are performed: S03A: The power coefficient of the compressor Pc = Max (Pcabc, Pbpc), and the target speed of the compressor is obtained through MAP (Pc); S03B: The power coefficient of the electric water heating is Ph = Max (Pcabh, Pbph), and the target power of the electric water heating is obtained through MAP (Ph); In S04, the following steps are performed: S04A: When the battery does not need to be cooled or heated; S04AA: When the cab air conditioner is in fresh air mode, each component executes the initial state control; S04AB: When the cab air conditioner is in cooling mode, the processing device (108) controls the on-off valve to open, controls the cooling fan (102) to work, and the other components are in the initial state; S04AC: When the cab air conditioner is in heating mode, the processing device (108) controls the heater water pump to operate, and the other components are in initial state; S04B: When the battery is in heating mode: S04BA: When the cab air conditioner is in fresh air mode, the processing device (108) 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 heating circuit, and the other components are in the initial state; S04BB: When the cab air conditioner is in cooling mode, the processing device (108) 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 heating circuit, controls the on-off valve to open, controls the cooling fan (102) to work, and the other components are in the initial state; S04BC: When the cab air conditioner is in heating mode, the processing device (108) 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 heating circuit, controls the warm air water pump to work, and the other components are in the initial state; S04C: When the battery is in cooling mode; S04CA: When the cab air conditioner is in fresh air mode, the processing device (108) 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 water-fluorine heat exchanger circuit, controls the cooling fan (102) to work, and the other components are in the initial state; S04CB: When the cab air conditioner is in cooling mode, the processing device (108) 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 water-fluorine heat exchanger circuit, controls the cooling fan (102) to work, controls the on-off valve to open, and the other components are in the initial state; S04CC: When the cab air conditioner is in heating mode, the processing device (108) 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 water-fluorine heat exchanger circuit, controls the cooling fan (102) to work, controls the warm air water pump to start, and the other components are in the initial state; In S05, the following steps are performed: S0501: The processing device (108) looks up the table MAP (MAX (|Tbp-Ttl|, |Tbp-Tth|)) according to the current battery temperature Tbp, the battery target temperature low threshold Ttl, and the battery target temperature high threshold Tth, and obtains the target speed of the battery water pump. The battery water pump receives the control instruction and responds to the target speed control. S0502: The processing device (108) looks up a table MAP (Ttcab-Tcab) according to the target temperature Ttcab and the real-time temperature Tcab of the cab to obtain a target speed of the heater water pump. The heater water pump receives the control instruction and responds to the target speed control. S0503: the processing device (108) obtains the initial speed Nfanraw of the cooling fan (102) by looking up the table MAP (Prsh) according to the high-pressure side pressure Prsh of the evaporator, and obtains the correction coefficient Kfan of the speed of the cooling fan (102) by looking up the table MAP (Ncmp) according to the compressor speed Ncmp, thereby obtaining the target speed Nfan=Nfanraw*Kfan of the cooling fan (102); S0504: The processing device (108) obtains the saturation temperature Trfgf of the refrigerant by looking up the table MAP (Prsl) according to the refrigerant pressure Prsl on the low-pressure side of the evaporator, and obtains the initial opening Ohvraw of the electronic expansion valve by combining the low-pressure side refrigerant temperature Trfgl with the table MAP (Trfgl-Trfgf); obtains the electronic expansion valve opening correction coefficient Khvr by looking up the table MAP (Prsh) according to the refrigerant pressure Prsh on the high-pressure side, and calculates the electronic expansion valve opening value Ohv=Ohvraw*Khvr.

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