Vehicle thermal management system and control method thereof

Abstract

The invention relates to the technical field of power battery cooling, and discloses an automotive thermal management system and a control method thereof.The automotive thermal management system comprises a compressor, a condenser, an evaporator, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first water pump, a second water pump, a third water pump, a first fan, a second fan, a dry cooler and an environment temperature sensor; the vehicle heat management system comprises an air conditioner heat management system, a battery heat management system and a PCS heat management system. The vehicle heat management system has the functions of battery refrigeration, battery heating, battery natural cooling, battery automatic liquid supplementing, battery self-circulation, PCS refrigeration, PCS heating, PCS waste heat recovery, PCS automatic liquid supplementing, PCS self-circulation, air conditioner refrigeration and air conditioner heating. According to the thermal management system for the vehicle, through integration of a plurality of thermal management systems, maximum space utilization and function diversification are achieved, and the problems that a traditional thermal management system is limited in thermal management range, single in function, low in space utilization rate and the like are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power battery cooling technology, in particular to a vehicle thermal management system and a control method thereof. BACKGROUND

[0002] With the advent of the new energy era, thermal management systems are becoming more and more popular. The existing thermal management systems are mainly divided into two types: single-system thermal management systems and double-system thermal management systems. The single-system thermal management system has a single function and cannot meet the management requirements of multiple heat sources under complex working conditions. The double-system thermal management system can realize the collaborative management of part of the heat sources, but can only cool or heat at the same time, and cannot realize both cooling and heating. SUMMARY

[0003] Therefore, the present application provides a vehicle thermal management system and a control method thereof to solve the problem that multiple thermal management functions cannot coexist.

[0004] In a first aspect, the present application provides a vehicle thermal management system, comprising: a compressor, a condenser, an evaporator, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first water pump, a second water pump, a third water pump, a first fan, a second fan, a dry cooler, and an ambient temperature sensor. The condenser is arranged opposite to the first fan, and the evaporator is arranged opposite to the second fan. The compressor, the condenser, and the evaporator are connected to form an air conditioning thermal management system. The compressor, the first water pump, the third water pump, the condenser, the first heat exchanger, and the dry cooler are connected to form a battery thermal management system. The compressor, the second water pump, the third water pump, the condenser, the second heat exchanger, and the third heat exchanger are connected to form a PCS thermal management system. The vehicle thermal management system has the functions of battery cooling, battery heating, battery natural cooling, battery automatic liquid supplementing, battery self-circulation, PCS cooling, PCS heating, PCS waste heat recovery, PCS automatic liquid supplementing, PCS side self-circulation, air conditioning cooling, and air conditioning heating. When the air conditioning cooling and the air conditioning heating functions are running, the air conditioning thermal management system is turned on. When the battery cooling, the battery heating, the battery natural cooling, the battery automatic liquid supplementing, and the battery self-circulation functions are running, the battery thermal management system is turned on. When the PCS cooling, the PCS heating, the PCS waste heat recovery, the PCS automatic liquid supplementing, and the PCS side self-circulation functions are running, the PCS thermal management system is turned on.

[0005] In an alternative embodiment, the air conditioner thermal management system further comprises a first air conditioner pipeline, a second air conditioner pipeline, a third air conditioner pipeline, and a fourth air conditioner pipeline; the compressor is arranged in the first air conditioner pipeline, the condenser is arranged in the second air conditioner pipeline, and the evaporator is arranged in the fourth air conditioner pipeline; the air conditioner thermal management system has an air conditioner cooling state and an air conditioner heating state; when the air conditioner thermal management system is in the air conditioner cooling state, the first air conditioner pipeline, the second air conditioner pipeline, the fourth air conditioner pipeline, and the third air conditioner pipeline are sequentially connected; when the air conditioner thermal management system is in the air conditioner heating state, the first air conditioner pipeline, the third air conditioner pipeline, the fourth air conditioner pipeline, and the second air conditioner pipeline are sequentially connected.

[0006] In an alternative embodiment, the battery thermal management system further comprises a first battery pipeline, a second battery pipeline, a third battery pipeline, a fourth battery pipeline, and the first water pump; the first water pump is arranged in the first battery pipeline, the first battery pipeline has a battery heat exchange liquid inlet and a battery heat exchange liquid outlet, and the first heat exchanger is arranged in the second battery pipeline; the battery thermal management system has a battery cooling state and a battery heating state; when the battery thermal management system is in the battery cooling state, the first air conditioner pipeline, the second air conditioner pipeline, the third battery pipeline, the second battery pipeline, the fourth battery pipeline, and the third air conditioner pipeline are sequentially connected, and the first battery pipeline and the second battery pipeline exchange heat through the first heat exchanger; when the battery thermal management system is in the battery heating state, the first air conditioner pipeline, the third air conditioner pipeline, the fourth battery pipeline, the second battery pipeline, the third battery pipeline, and the second air conditioner pipeline are sequentially connected, and the first battery pipeline and the second battery pipeline exchange heat through the first heat exchanger.

[0007] In an alternative embodiment, the PCS thermal management system comprises a first PCS pipeline, a second PCS pipeline, the second water pump is arranged in the first PCS pipeline, the first PCS pipeline has a PCS heat transfer liquid inlet and a PCS heat transfer liquid outlet, and the second heat exchanger is arranged in the second PCS pipeline; the PCS thermal management system has a PCS refrigeration state and a PCS heating state; when the PCS thermal management system is in the PCS refrigeration state, the first air conditioner pipeline, the second air conditioner pipeline, the third battery pipeline, the second PCS pipeline, the fourth battery pipeline and the third air conditioner pipeline are sequentially connected, and the first PCS pipeline and the second PCS pipeline exchange heat through the second heat exchanger; when the PCS thermal management system is in the PCS heating state, the first air conditioner pipeline, the third air conditioner pipeline, the fourth battery pipeline, the second PCS pipeline, the third battery pipeline and the second air conditioner pipeline are sequentially connected, and the first PCS pipeline and the second PCS pipeline exchange heat through the second heat exchanger.

[0008] In an alternative embodiment, the battery thermal management system further comprises a battery natural cooling pipeline, and the dry cooler is arranged in the battery natural cooling pipeline; the outlet of the battery natural cooling pipeline is close to the outlet of the first water pump at the connection with the first battery pipeline, and the inlet of the battery natural cooling pipeline is close to the inlet of the third heat exchanger at the connection with the first battery pipeline.

[0009] In an alternative embodiment, the PCS thermal management system further comprises a PCS waste heat recovery pipeline, and the PCS waste heat recovery pipeline is connected to the first PCS pipeline close to the inlet of the second water pump; the PCS waste heat recovery pipeline exchanges heat with the first battery pipeline through a third heat exchanger.

[0010] In an alternative embodiment, the battery thermal management system further comprises a battery liquid supplement pipeline, a water tank and a third water pump, the water tank and the third water pump are arranged in the battery liquid supplement pipeline, and the battery liquid supplement pipeline is connected to the first battery pipeline close to the battery heat transfer liquid inlet; the PCS thermal management system further comprises a PCS liquid supplement pipeline, the water tank and the third water pump are arranged in the PCS liquid supplement pipeline, and the PCS liquid supplement pipeline is connected to the second PCS pipeline close to the PCS heat transfer liquid inlet.

[0011] In an alternative embodiment, the air conditioning thermal management system further comprises a first branch and a second branch, the first branch is connected to the fourth air conditioning pipeline upstream of the evaporator, the first branch is connected to the second air conditioning pipeline near one side of the condenser, the second branch is connected to the second air conditioning pipeline near the other side of the condenser, and the second branch is connected to the fourth air conditioning pipeline on the other side of the condenser.

[0012] In a second aspect, the present application also provides a control method for controlling the vehicle thermal management system described above, comprising the following steps: obtaining the inlet temperature of the first water pump, the inlet temperature of the second water pump, the inlet pressure of the first water pump, the inlet pressure of the second water pump, the ambient temperature sensor temperature, the air conditioning thermal management system refrigeration instruction, and the air conditioning thermal management system heating instruction; and controlling the vehicle thermal management system to realize functions according to the inlet temperature of the first water pump, the inlet temperature of the second water pump, the inlet pressure of the first water pump, the inlet pressure of the second water pump, the ambient temperature sensor temperature, the air conditioning thermal management system refrigeration instruction, and the air conditioning thermal management system heating instruction.

[0013] In an alternative embodiment, according to the first water pump inlet temperature, the second water pump inlet temperature, the first water pump inlet pressure, the second water pump inlet pressure, the ambient temperature sensor display temperature, the air conditioning thermal management system refrigeration instruction and the air conditioning thermal management system heating instruction control the vehicle thermal management system to implement the steps of function, including: when the first water pump inlet temperature is higher than 18℃, the battery thermal management system starts, the battery refrigeration function runs, when the first water pump inlet temperature is lower than 10℃, the battery thermal management system starts, the battery heating function runs; When the first water pump inlet pressure is lower than 1bar, the battery thermal management system starts, the battery automatic liquid supplement function runs; When the ambient temperature sensor display temperature is greater than 5℃ and less than 10℃, the first water pump inlet temperature is less than 18℃ and greater than 15℃, the battery thermal management system starts, the battery self-circulation function runs; When the second water pump inlet temperature is higher than 55℃, the PCS thermal management system starts, the PCS refrigeration function runs, when the second water pump inlet temperature is lower than 30℃, the PCS thermal management system starts, the PCS heating function runs; When the second water pump inlet pressure is lower than 1bar, the PCS thermal management system starts, the PCS automatic liquid supplement function runs; When the ambient temperature sensor display temperature is greater than 5℃ and less than 10℃, the second water pump inlet temperature is less than 55℃ and greater than 40, the PCS thermal management system starts, the PCS self-circulation function runs; When the air conditioning thermal management system refrigeration instruction is issued, the air conditioning thermal management system starts, the air conditioning refrigeration function runs, when the air conditioning thermal management system heating instruction is issued, the air conditioning thermal management system starts, the air conditioning heating function runs; When the ambient temperature sensor display temperature is less than 0℃, the first water pump inlet temperature is less than 20℃ and greater than 10℃, the battery thermal management system starts, the battery natural cooling function runs; When the battery heating and PCS heating functions run together, the ambient temperature sensor display temperature is lower than 5℃ and greater than -10℃, the PCS thermal management system starts, the PCS waste heat recovery function runs, or when the battery natural cooling function runs, the second water pump inlet temperature is greater than 40℃ and less than 55℃, the PCS thermal management system starts, the PCS waste heat recovery function runs.

[0014] The technical scheme of the present application has the following advantages: 1. The application provides a kind of vehicle thermal management system and control method thereof, by condenser and first fan opposite arrangement, evaporator and second fan opposite arrangement, compressor, condenser, evaporator communication forms air conditioner thermal management system, compressor, first water pump, third water pump, condenser, first heat exchanger, dry cooler is communicated to form battery thermal management system, compressor, second water pump, third water pump, condenser, second heat exchanger, third heat exchanger is communicated to form PCS thermal management system, therefore, the vehicle thermal management system can realize multiple functions and realize integration, by multiple thermal management system integration, it can realize the high conversion rate of cost and functional diversification, reduce space occupancy.

[0015] 2. The application provides a kind of vehicle thermal management system and control method thereof, by setting air conditioner thermal management system, battery thermal management system and PCS thermal management system respectively, make system have self-adapting independent regulation ability, each thermal management unit can be independently operated according to actual demand, and do not interfere with each other.

[0016] 3. The application provides a kind of vehicle thermal management system and control method thereof, by PCS waste heat recovery function, recovery and utilization of waste heat, further improve energy utilization efficiency, reduce the waste of energy, for vehicle thermal management system overall energy saving provides safeguard.

[0017] 4. The application provides a kind of vehicle thermal management system and control method thereof, by battery automatic liquid supplement and PCS automatic liquid supplement function, ensure system normal operation, system uses simple liquid supplement channel, timely ensure liquid supplement in the case of insufficient pressure, improve liquid supplement function efficiency. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0019] Figure 1 The overall structure of a vehicle thermal management system provided by embodiment 1 of the application is shown in the figure. Figure 2 The structure of air conditioner thermal management system when running is provided for embodiment 1 of the application. Figure 3 The structure of battery thermal management system when running is provided for embodiment 1 of the application. Figure 4 The structure of PCS thermal management system when running is provided for embodiment 1 of the application.

[0020] Reference numerals: 100, air conditioning thermal management system; 101, compressor; 102, condenser; 103, first fan; 104, evaporator; 105, first temperature sensor; 106, second temperature sensor; 107, pressure switch; 108, ambient temperature sensor; 109, four-way valve; 1091, first port of four-way valve; 1092, second port of four-way valve; 1093, third port of four-way valve; 1094, fourth port of four-way valve; 110, first pressure sensor; 111, second pressure sensor; 112, first needle valve; 113, second needle valve; 114, dry filter; 115, first electric regulating valve; 116, sixth electric regulating valve; 117, seventh electric regulating valve; 118, eleventh electric regulating valve; 119, second three-way valve; 1191, first port of second three-way valve; 1192, second port of second three-way valve; 1193, third port of second three-way valve; 120, third electronic expansion valve; 121, first check valve; 122, second fan; 123, first air conditioning pipeline; 124, second air conditioning pipeline; 125, third air conditioning pipeline; 126, fourth air conditioning pipeline; 127, first branch; 128, second branch; 200, battery thermal management system; 201, first heat exchanger; 202, first water pump; 203, third temperature sensor; 204, fourth temperature sensor; 205, third pressure sensor; 206, fourth pressure sensor; 207, third water pump; 208, water tank; 209, expansion water tank; 210, dry cooler; 211, second electronic expansion valve; 212, fourth electric regulating valve; 213, fifth electric regulating valve; 214, third three-way valve; 2141, first port of third three-way valve; 2142, second port of third three-way valve; 2143, third port of third three-way valve; 215, first ball valve; 216, second ball valve; 217, first check valve; 218, second check valve; 219, third check valve; 220, ninth electric regulating valve; 221, tenth electric regulating valve; 222, first three-way valve; 2221, first port of first three-way valve; 2222, second port of first three-way valve; 2223, third port of first three-way valve; 223, first battery pipeline; 224, second battery pipeline; 225, third battery pipeline; 226, fourth battery pipeline; 227, battery natural cooling pipeline; 228, battery liquid supplement pipeline; 300, PCS thermal management system; 301, second heat exchanger; 303, third heat exchanger; 304, second water pump; 305, fourth three-way valve; 3051, first port of fourth three-way valve; 3052, second port of fourth three-way valve; 3053, third port of fourth three-way valve; 306, fifth temperature sensor; 307, sixth temperature sensor; 308, fifth pressure sensor; 309, sixth pressure sensor; 310, second electric regulating valve; 311, first electronic expansion valve; 312, third electric regulating valve; 313, eighth electric regulating valve; 314, first PCS pipeline;315 second PCS line; 316 PCS waste heat recovery line. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts should fall into the scope of the present application.

[0022] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] Embodiment 1 As Figures 1 to 4One of the embodiments of the vehicle thermal management system, the vehicle thermal management system comprises: a compressor 101, a condenser 102, an evaporator 104, a first heat exchanger 201, a second heat exchanger 301, a third heat exchanger 303, a first water pump 202, a second water pump 304, a third water pump 207, a first fan 103, a second fan 122, a dry cooler 210, an ambient temperature sensor 108, wherein the condenser 102 is arranged opposite to the first fan 103, the evaporator 104 is arranged opposite to the second fan 122, the compressor 101, the condenser 102 and the evaporator 104 are communicated to form an air conditioning thermal management system 100; the compressor 101, the first water pump 202, the third water pump 207, the condenser 102, the first heat exchanger 201 and the dry cooler 210 are communicated to form a battery thermal management system 200; the compressor 101, the second water pump 304, the third water pump 207, the condenser 102, the second heat exchanger 301 and the third heat exchanger 303 are communicated to form a PCS thermal management system 300; the vehicle thermal management system has the functions of battery refrigeration, battery heating, battery natural cooling, battery automatic liquid supplement, battery self-circulation, PCS refrigeration, PCS heating, PCS waste heat recovery, PCS automatic liquid supplement, PCS side self-circulation, air conditioning refrigeration and air conditioning heating; when the functions of air conditioning refrigeration and air conditioning heating are running, the air conditioning thermal management system 100 is started; when the functions of battery refrigeration, battery heating, battery natural cooling, battery automatic liquid supplement and battery self-circulation are running, the battery thermal management system 200 is started; when the functions of PCS refrigeration, PCS heating, PCS waste heat recovery, PCS automatic liquid supplement and PCS side self-circulation are running, the PCS thermal management system 300 is started.

[0026] The vehicle thermal management system of the embodiment can operate the air conditioner thermal management system 100, the battery thermal management system 200 and the PCS thermal management system 300 according to different environments and various needs. In a high-temperature environment, the system can start the air conditioner thermal management system 100 to ensure the comfort of the vehicle interior temperature, start the battery thermal management system 200 to prevent the battery from overheating and affecting operation, and start the PCS thermal management system 300 to start the PCS refrigeration function. In a low-temperature environment, the system can start the air conditioner thermal management system 100 according to the needs of the personnel, start the battery thermal management system 200 and the PCS thermal management system 300 according to the situation to perform battery heating and PCS heating to ensure the normal use of the vehicle. If the battery side temperature is too high and the air conditioner side issues a heating instruction, the battery refrigeration and the air conditioner heating are performed at the same time, and so on. The 28 functions of battery refrigeration, PCS refrigeration, air conditioner refrigeration, battery heating, PCS heating, air conditioner heating, battery natural cooling, first automatic liquid supplement, second automatic liquid supplement, first self-circulation, second self-circulation, battery and PCS heating combined with PCS waste heat recovery, PCS heating combined with PCS waste heat recovery, battery and air conditioner and PCS heating combined with PCS waste heat recovery, first automatic liquid supplement combined with second automatic liquid supplement, first self-circulation combined with second self-circulation, battery natural cooling combined with PCS waste heat recovery, battery refrigeration combined with PCS refrigeration, battery refrigeration combined with air conditioner refrigeration, air conditioner refrigeration combined with PCS refrigeration, battery and air conditioner refrigeration combined with PCS refrigeration, battery heating combined with PCS heating, battery heating combined with air conditioner heating, air conditioner heating combined with PCS heating, battery and air conditioner heating combined with PCS heating, battery refrigeration combined with air conditioner heating, PCS refrigeration combined with air conditioner heating, and battery and PCS refrigeration combined with air conditioner heating can be realized. The vehicle thermal management system provided by the embodiment can realize multiple functions and integration. Through the integration of multiple thermal management systems, the cost conversion rate, functional diversification and space occupancy rate can be reduced.

[0027] It should be noted that in the related art, vehicle thermal management systems are mainly divided into two types, namely single-system thermal management systems and double-system thermal management systems. The single-system thermal management system has a single function and cannot meet the multi-heat source management needs under complex working conditions. The double-system thermal management system can realize partial heat source collaborative management, but can only simultaneously refrigerate or heat, and cannot refrigerate and heat at the same time. In the embodiment, multiple thermal management systems can be integrated to maximize cost savings, maximize space utilization and functional diversification, and solve the limitations of traditional thermal management systems in different thermal management ranges, single function and low space utilization.

[0028] Specifically, in the embodiment, as shown in Figure 2As shown, the air-conditioning thermal management system 100 further comprises a first air-conditioning pipeline 123, a second air-conditioning pipeline 124, a third air-conditioning pipeline 125, and a fourth air-conditioning pipeline 126; the compressor 101 is arranged in the first air-conditioning pipeline 123, the condenser 102 is arranged in the second air-conditioning pipeline 124, and the evaporator 104 is arranged in the fourth air-conditioning pipeline 126; the air-conditioning thermal management system 100 has an air-conditioning cooling state and an air-conditioning heating state; when the air-conditioning thermal management system 100 is in the air-conditioning cooling state, the first air-conditioning pipeline 123, the second air-conditioning pipeline 124, the fourth air-conditioning pipeline 126, and the third air-conditioning pipeline 125 are sequentially communicated; when the air-conditioning thermal management system 100 is in the air-conditioning heating state, the first air-conditioning pipeline 123, the third air-conditioning pipeline 125, the fourth air-conditioning pipeline 126, and the second air-conditioning pipeline 124 are sequentially communicated.

[0029] Specifically, in the present embodiment, as shown in Figure 1 As shown, the air-conditioning thermal management system 100 further comprises a four-way valve 109 and an eleventh electrically-controlled regulating valve 118; a first interface 1091 of the four-way valve is connected with an outlet of the compressor 101, a second interface 1092 of the four-way valve is connected with an inlet of the compressor 101, a third interface 1093 of the four-way valve is connected with the condenser 102, and a fourth interface 1094 of the four-way valve is connected with the evaporator 104 through the eleventh electrically-controlled regulating valve 118 or a second three-way valve 119; the four-way valve 109 has two working states; when the air-conditioning thermal management system 100 operates an air-conditioning cooling function, the first interface 1091 of the four-way valve is communicated with the third interface 1093 of the four-way valve, and the second interface 1092 of the four-way valve is communicated with the fourth interface 1094 of the four-way valve; when the air-conditioning thermal management system 100 operates an air-conditioning heating function, the first interface 1091 of the four-way valve is communicated with the fourth interface 1094 of the four-way valve, and the second interface 1092 of the four-way valve is communicated with the third interface 1093 of the four-way valve.

[0030] Specifically, in the present embodiment, as shown in Figure 2 As shown, the air-conditioning thermal management system 100 further comprises a second three-way valve 119; a first interface 1191 of the second three-way valve is connected with the evaporator 104, a second interface 1192 of the second three-way valve is connected with the first heat exchanger 201 or the second heat exchanger 301 through a third three-way valve 214, and a third interface 1193 of the second three-way valve is connected with the condenser 102 or the compressor 101 through the fourth interface 1094 of the four-way valve; when the air-conditioning thermal management system 100 operates, the first interface 1191 of the second three-way valve is communicated with the third interface 1193 of the second three-way valve; when the battery thermal management system 200 and / or the PCS thermal management system 300 operates, the second interface 1192 of the second three-way valve is communicated with the third interface 1193 of the second three-way valve.

[0031] It is worth mentioning that the first air conditioning pipeline 123 is also provided with a first temperature sensor 105, a first pressure sensor 110, a pressure switch 107, a second temperature sensor 106, a second pressure sensor 111, a first needle valve 112, and the second air conditioning pipeline 124 is also provided with a second needle valve 113, a dry filter 114, a sixth electric regulating valve 116, and a third electronic expansion valve 120. The first temperature sensor 105 monitors the outlet temperature of the compressor 101, the second temperature sensor 106 monitors the inlet temperature of the compressor 101, the first pressure sensor 110 monitors the inlet temperature of the compressor 101, and the second pressure sensor 111 monitors the outlet temperature of the compressor 101.

[0032] Specifically, in the embodiment, the first fan 103 is provided with three, and the air volume of each first fan 103 is 680 m 3 / min, the static pressure is 350 Pa, the power is 155 W, the voltage is 230 V, the specification is AC fan, and the material is cast aluminum and plastic; the heat exchange capacity of the condenser 102 is 11.461 kW, the specification is a micro-channel condenser 102, and the material is copper and aluminum; the power of the compressor 101 is 1.65 kW, the displacement is 18.6 ml / rev, and the voltage is 220 V; the heat exchange capacity of the first heat exchanger 201 and the second heat exchanger 301 is 8 kW; the power of the first water pump 202, the second water pump 304, and the third water pump 207 is 350 W, the head is 17 m, the specification is 50 L / min, and the material is AISI 304; the first heat exchanger 201, the second heat exchanger 301, and the third heat exchanger 303 are brazed plate heat exchangers, and the material is AISI 316; the first water pump 202, the second water pump 304, the first heat exchanger 201, the second heat exchanger 301, and the third heat exchanger 303 are provided with chucks at the pipeline inlet and outlet respectively; the opening pressure of the pressure switch 107 is 34 bar, and the closing pressure is 45 bar; the first temperature sensor 105, the second temperature sensor 106, and the environmental temperature sensor 108 are negative temperature coefficient thermistors, the nominal resistance of the thermistor is 10 kilo-ohms, the resistance error range is ±1%, and the material is B value 3950; the output voltage range of the first pressure sensor 110 is 0.5 V to 4.5 V, the measurable pressure range is 0 bar to 50 bar, the output voltage range of the second pressure sensor 111 is 0.5 V to 4.5 V, and the measurable pressure range is 0 bar to 30 bar.

[0033] Specifically, in the embodiment, as Figure 3As shown, the battery thermal management system 200 further comprises a first battery pipeline 223, a second battery pipeline 224, a third battery pipeline 225, and a fourth battery pipeline 226. The first water pump 202 is arranged in the first battery pipeline 223, which has a battery heat exchange liquid inlet and a battery heat exchange liquid outlet. The first heat exchanger 201 is arranged in the second battery pipeline 224. The battery thermal management system 200 has a battery refrigeration state and a battery heating state. When the battery thermal management system 200 is in the battery refrigeration state, the first air conditioner pipeline 123, the second air conditioner pipeline 124, the third battery pipeline 225, the second battery pipeline 224, the fourth battery pipeline 226, and the third air conditioner pipeline 125 are sequentially connected. The first battery pipeline 223 and the second battery pipeline 224 exchange heat through the first heat exchanger 201. When the battery thermal management system 200 is in the battery heating state, the first air conditioner pipeline 123, the third air conditioner pipeline 125, the fourth battery pipeline 226, the second battery pipeline 224, the third battery pipeline 225, and the second air conditioner pipeline 124 are sequentially connected. The first battery pipeline 223 and the second battery pipeline 224 exchange heat through the first heat exchanger 201.

[0034] Specifically, in the present embodiment, as shown in Figure 3 As shown, the battery thermal management system 200 further comprises a first three-way valve 222 and a third three-way valve 214. The first three-way valve first interface 2221 is connected with the dry cooler 210. The first three-way valve second interface 2222 is connected with the first water pump 202. The first three-way valve third interface 2223 is connected with the first heat exchanger 201. When the battery thermal management system 200 operates the battery natural cooling function, the first three-way valve first interface 2221 and the first three-way valve second interface 2222 are connected in communication. When other functions except the battery natural cooling function are operated, the first three-way valve second interface 2222 and the first three-way valve third interface 2223 are connected in communication. The third three-way valve first interface 2141 is connected with the first heat exchanger 201. The third three-way valve second interface 2142 is connected with the evaporator 104. The third three-way valve third interface 2143 is connected with the evaporator 104 or the condenser 102 through the second three-way valve second interface 1192. When the battery refrigeration combined air conditioner refrigeration is started, or the battery refrigeration combined PCS refrigeration combined air conditioner refrigeration is started, or the battery heating combined air conditioner heating is started, the third three-way valve first interface 2141 and the third three-way valve second interface 2142 are connected in communication. When other functions except the three functions are operated, the third three-way valve first interface 2141 and the third three-way valve third interface 2143 are connected in communication.

[0035] It is worth mentioning that the first battery pipeline 223 is also provided with a third pressure sensor 205, a fourth pressure sensor 206, a third temperature sensor 203, a fourth temperature sensor 204, a first one-way valve 217, the second battery pipeline 224 is also provided with a second electronic expansion valve 211, a fourth electric regulating valve 212, a fifth electric regulating valve 213, the third temperature sensor 203 monitors the first water pump 202 inlet temperature, the third pressure sensor 205 monitors the first water pump 202 inlet pressure, the fourth temperature sensor 204 monitors the first heat exchanger 201 outlet temperature, and the third pressure sensor 205 monitors the first heat exchanger 201 outlet pressure.

[0036] Specifically, in the embodiment, the third temperature sensor 203 and the fourth temperature sensor 204 are negative temperature coefficient thermistors, the nominal resistance of the thermistor is 10 kilo-ohms, the fifth temperature sensor 306 and the sixth temperature sensor 307 are embedded M10 threads; the output voltage range of the third pressure sensor 205 and the fourth pressure sensor 206 is 0.5V to 4.5V, the measurable pressure range is -1bar to 12bar; the outlet and inlet parameters are CQC20.

[0037] Specifically, in the embodiment, as shown in Figure 4 The PCS thermal management system 300 includes a first PCS pipeline 314 and a second PCS pipeline 315, the second water pump 304 is arranged in the first PCS pipeline 314, the first PCS pipeline 314 has a PCS heat exchange liquid inlet and a PCS heat exchange liquid outlet, and the second heat exchanger 301 is arranged in the second PCS pipeline 315; the PCS thermal management system 300 has a PCS refrigeration state and a PCS heating state, when the PCS thermal management system 300 is in the PCS refrigeration state, the first air conditioning pipeline 123, the second air conditioning pipeline 124, the third battery pipeline 225, the second PCS pipeline 315, the fourth battery pipeline 226 and the third air conditioning pipeline 125 are connected in sequence, the first PCS pipeline 314 and the second PCS pipeline 315 exchange heat through the second heat exchanger 301, when the PCS thermal management system 300 is in the PCS heating state, the first air conditioning pipeline 123, the third air conditioning pipeline 125, the fourth battery pipeline 226, the second PCS pipeline 315, the third battery pipeline 225 and the second air conditioning pipeline 124 are connected in sequence, and the first PCS pipeline 314 and the second PCS pipeline 315 exchange heat through the second heat exchanger 301.

[0038] Specifically, in the embodiment, as shown in Figure 4As shown, the PCS thermal management system 300 further comprises a fourth three-way valve 305, a first interface 3051 of the fourth three-way valve 305 being connected with the second water pump 304, a second interface 3052 of the fourth three-way valve 305 being connected with the third heat exchanger 303, and a third interface 3053 of the fourth three-way valve 305 being connected with the water inlet of the PCS thermal management system 300; when the PCS waste heat recovery function is started, the second interface 3052 of the fourth three-way valve 305 is connected with the third interface 3053 of the fourth three-way valve 305; when other functions are operated, the first interface 3051 of the fourth three-way valve 305 is connected with the third interface 3053 of the fourth three-way valve 305.

[0039] It is worth noting that the first PCS pipeline 314 is further provided with a fifth pressure sensor 308, a sixth pressure sensor 309, a fifth temperature sensor 306, and a sixth temperature sensor 307, and the second PCS pipeline 315 is further provided with a first electronic expansion valve 311 and a second electric regulating valve 310; the fifth temperature sensor 306 monitors the inlet temperature of the second water pump 304, the fifth pressure sensor 308 monitors the inlet pressure of the first water pump 202, the sixth temperature sensor 307 monitors the outlet temperature of the second heat exchanger 301, and the sixth pressure sensor 309 monitors the outlet pressure of the second heat exchanger 301.

[0040] Specifically, in the embodiment, the fifth temperature sensor 306 and the sixth temperature sensor 307 are negative temperature coefficient thermistors, the nominal resistance of the thermistors is 10 kilo-ohms, and the fifth temperature sensor 306 and the sixth temperature sensor 307 are embedded and have M10 threads; the output voltage range of the fifth pressure sensor 308 and the sixth pressure sensor 309 is 0.5V to 4.5V, and the measurable pressure range is -1bar to 12bar; the outlet and inlet parameters are CQC20.

[0041] Specifically, in the embodiment, as shown in Figure 3 The battery thermal management system 200 further comprises a battery natural cooling pipeline 227, and the dry cooler 210 is arranged in the battery natural cooling pipeline 227; the connection between the outlet of the battery natural cooling pipeline 227 and the first battery pipeline 223 is close to the outlet of the first water pump 202, and the connection between the inlet of the battery natural cooling pipeline 227 and the first battery pipeline 223 is close to the inlet of the third heat exchanger 303.

[0042] It is worth noting that the battery natural cooling pipeline 227 is further provided with a second one-way valve 218.

[0043] Specifically, in the embodiment, as shown in Figure 4As shown, the PCS thermal management system 300 further comprises a PCS waste heat recovery pipeline 316, which is connected to the first PCS pipeline 314 near the inlet of the second water pump 304, and exchanges heat with the first battery pipeline 223 through the third heat exchanger 303.

[0044] It is worth noting that the PCS waste heat recovery pipeline 316 is further provided with an eighth electric regulating valve 313.

[0045] Specifically, in the present embodiment, as shown in Figure 3 As shown, the battery thermal management system 200 further comprises a battery liquid supplement pipeline 228, a water tank 208, and a third water pump 207, the water tank 208 and the third water pump 207 are arranged in the battery liquid supplement pipeline 228, the battery liquid supplement pipeline 228 is connected to the first battery pipeline 223 near the battery heat exchange liquid inlet, when the battery automatic liquid supplement function is running, the battery liquid supplement pipeline 228 is in communication with the first battery pipeline 223, the PCS thermal management system 300 further comprises a PCS liquid supplement pipeline, the water tank 208 and the third water pump 207 are arranged in the PCS liquid supplement pipeline, the PCS liquid supplement pipeline is connected to the second PCS pipeline 315 near the PCS heat exchange liquid inlet, when the PCS automatic liquid supplement function is running, the PCS liquid supplement pipeline is in communication with the first PCS pipeline 314, and the battery thermal management system 200 further comprises an expansion water tank 209 pipeline, the expansion water tank 209 is arranged in the expansion water tank 209 pipeline.

[0046] It is worth noting that the battery liquid supplement pipeline 228 is further provided with a third one-way valve 219 and a second ball valve 216, and the expansion water tank 209 pipeline is further provided with a first ball valve 215.

[0047] Specifically, in the present embodiment, the first ball valve 215 and the second ball valve 216 have G1 / 2 specification threads, a length of 58 mm, and a material of AISI 304; the expansion water tank 209 has a volume of 2L and a top charging pressure of 0.4 bar; the water inlet interface has a diameter of 20 mm, a pagoda-shaped interface, and a material of AISI 304.

[0048] It is worth noting that when the battery self-circulation function is running, the first battery pipeline 223 is in communication with the battery liquid supplement pipeline 228 and the expansion water tank 209 pipeline, and when the PCS self-circulation function is running, the first PCS pipeline 314 is in communication with the PCS liquid supplement pipeline and the expansion water tank 209 pipeline.

[0049] Specifically, in the present embodiment, as shown in Figure 2As shown, the air-conditioning thermal management system 100 further comprises a first branch 127 and a second branch 128, the first branch 127 is connected to the fourth air-conditioning pipeline 126 at a position upstream of the evaporator 104, the first branch 127 is connected to the second air-conditioning pipeline 124 at a position close to one side of the condenser 102, the second branch 128 is connected to the second air-conditioning pipeline 124 at a position close to the other side of the condenser 102, and the second branch 128 is connected to the fourth air-conditioning pipeline 126 at a position on the other side of the condenser 102.

[0050] It is worth noting that in the present embodiment, the first branch 127 is further provided with a fourth one-way valve 121 and a seventh electrically-controlled regulating valve 117, and the second branch 128 is further provided with a first electrically-controlled regulating valve 115.

[0051] Embodiment 2 A control method for controlling a vehicle thermal management system, comprising the following steps: Step S10: obtaining the inlet temperature of the first water pump 202, the inlet temperature of the second water pump 304, the inlet pressure of the first water pump 202, the inlet pressure of the second water pump 304, the temperature of the ambient temperature sensor 108, the air-conditioning thermal management system 100 refrigeration instruction, and the air-conditioning thermal management system 100 heating instruction; According to the inlet temperature of the first water pump 202, the inlet temperature of the second water pump 304, the inlet pressure of the first water pump 202, the inlet pressure of the second water pump 304, the temperature of the ambient temperature sensor 108, the air-conditioning thermal management system 100 refrigeration instruction, and the air-conditioning thermal management system 100 heating instruction, the vehicle thermal management system is controlled to realize the function.

[0052] Step S20: According to the inlet temperature of the first water pump 202, the inlet temperature of the second water pump 304, the inlet pressure of the first water pump 202, the inlet pressure of the second water pump 304, the temperature of the ambient temperature sensor 108, the air-conditioning thermal management system 100 refrigeration instruction, and the air-conditioning thermal management system 100 heating instruction, the step of controlling the vehicle thermal management system to realize the function comprises: When the inlet temperature of the first water pump 202 is higher than 18℃, the battery thermal management system 200 is started, and the battery refrigeration function is operated; when the inlet temperature of the first water pump 202 is lower than 10℃, the battery thermal management system 200 is started, and the battery heating function is operated; When the inlet pressure of the first water pump 202 is lower than 1bar, the battery thermal management system 200 is started, and the battery automatic liquid supplement function is operated; When the temperature of the ambient temperature sensor 108 is greater than 5℃ and less than 10℃, the inlet temperature of the first water pump 202 is less than 18℃ and greater than 15℃, the battery thermal management system 200 is started, and the battery self-circulation function is operated; When the inlet temperature of the second water pump 304 is higher than 55℃, the PCS thermal management system 300 is started, and the PCS refrigeration function is operated; when the inlet temperature of the second water pump 304 is lower than 30℃, the PCS thermal management system 300 is started, and the PCS heating function is operated; When the inlet pressure of the second water pump 304 is lower than 1 bar, the PCS thermal management system 300 is started, and the PCS automatic liquid supplement function is operated; When the temperature displayed by the ambient temperature sensor 108 is greater than 5℃ and less than 10℃, and the inlet temperature of the second water pump 304 is less than 55℃ and greater than 40℃, the PCS thermal management system 300 is started, and the PCS self-circulation function is operated; When the air conditioning thermal management system 100 is instructed to refrigerate, the air conditioning thermal management system 100 is started, and the air conditioning refrigeration function is operated; when the air conditioning thermal management system 100 is instructed to heat, the air conditioning thermal management system 100 is started, and the air conditioning heating function is operated; When the temperature displayed by the ambient temperature sensor 108 is less than 0℃, and the inlet temperature of the first water pump 202 is less than 20℃ and greater than 10℃, the battery thermal management system 200 is started, and the battery natural cooling function is operated; When the battery heating function and the PCS heating function are operated together, and the temperature displayed by the ambient temperature sensor 108 is lower than 5℃ and greater than -10℃, the PCS thermal management system 300 is started, and the PCS waste heat recovery function is operated; or, when the battery natural cooling function is operated, and the inlet temperature of the second water pump 304 is greater than 40℃ and less than 55℃, the PCS thermal management system 300 is started, and the PCS waste heat recovery function is operated.

[0053] When the battery refrigeration function is started together with the air conditioning heating function, or the PCS refrigeration function is started together with the air conditioning heating function, or the battery refrigeration function is started together with the PCS refrigeration function and the air conditioning heating function, the first branch 127 and the second branch 128 are communicated, and the first electrically operated regulating valve 115 and the seventh electrically operated regulating valve 117 are opened.

[0054] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A vehicle thermal management system, characterized in that, include: The system includes a compressor (101), a condenser (102), an evaporator (104), a first heat exchanger (201), a second heat exchanger (301), a third heat exchanger (303), a first water pump (202), a second water pump (304), a third water pump (207), a first fan (103), a second fan (122), a dry cooler (210), and an ambient temperature sensor (108). The condenser (102) is disposed opposite to the first fan (103), and the evaporator (104) is disposed opposite to the second fan (122). The compressor (101), the condenser (102), and the evaporator (104) are connected to form an air conditioning thermal management system (100). The compressor (101), the first water pump (202), the third water pump (207), the condenser (102), the first heat exchanger (201), and the dry cooler (210) are connected to form a battery thermal management system (200). The compressor (101), the second water pump (304), the third water pump (207), the condenser (102), the second heat exchanger (301), and the third heat exchanger (303) are connected to form a PCS thermal management system (300). The vehicle thermal management system has the functions of battery cooling, battery heating, battery natural cooling, automatic battery electrolyte replenishment, battery self-circulation, PCS cooling, PCS heating, PCS waste heat recovery, PCS automatic electrolyte replenishment, PCS self-circulation, air conditioning cooling, and air conditioning heating. When the air conditioner is cooling or heating, the air conditioner thermal management system (100) is turned on; when the battery is cooling, heating, naturally cooling, automatically replenishing, or self-circulating, the battery thermal management system (200) is turned on; when the PCS is cooling, heating, recovering waste heat, automatically replenishing, or self-circulating, the PCS thermal management system (300) is turned on.

2. The vehicle thermal management system according to claim 1, characterized in that, The air conditioning thermal management system (100) further includes a first air conditioning pipe (123), a second air conditioning pipe (124), a third air conditioning pipe (125), and a fourth air conditioning pipe (126); the compressor (101) is located in the first air conditioning pipe (123), the condenser (102) is located in the second air conditioning pipe (124), and the evaporator (104) is located in the fourth air conditioning pipe (126); The air conditioning thermal management system (100) has an air conditioning cooling state and an air conditioning heating state. When the air conditioning thermal management system (100) is in the air conditioning cooling state, the first air conditioning pipe (123), the second air conditioning pipe (124), the fourth air conditioning pipe (126) and the third air conditioning pipe (125) are connected in sequence. When the air conditioning thermal management system (100) is in the air conditioning heating state, the first air conditioning pipe (123), the third air conditioning pipe (125), the fourth air conditioning pipe (126) and the second air conditioning pipe (124) are connected in sequence.

3. The vehicle thermal management system according to claim 2, characterized in that, The battery thermal management system (200) further includes a first battery pipeline (223), a second battery pipeline (224), a third battery pipeline (225), and a fourth battery pipeline (226). The first water pump (202) is installed in the first battery pipeline (223). The first battery pipeline (223) has a battery heat exchange fluid inlet and a battery heat exchange fluid outlet. The first heat exchanger (201) is installed in the second battery pipeline (224). The battery thermal management system (200) has a battery cooling state and a battery heating state. When the battery thermal management system (200) is in the battery cooling state, the first air conditioning pipe (123), the second air conditioning pipe (124), the third battery pipe (225), the second battery pipe (224), the fourth battery pipe (226) and the third air conditioning pipe (125) are connected in sequence, and the first battery pipe (223) and the second battery pipe (224) exchange heat through the first heat exchanger (201). When the battery thermal management system (200) is in the battery heating state, the first air conditioning pipe (123), the third air conditioning pipe (125), the fourth battery pipe (226), the second battery pipe (224), the third battery pipe (225) and the second air conditioning pipe (124) are connected in sequence, and the first battery pipe (223) and the second battery pipe (224) exchange heat through the first heat exchanger (201).

4. The vehicle thermal management system according to claim 3, characterized in that, The PCS thermal management system (300) includes a first PCS pipeline (314) and a second PCS pipeline (315). The second water pump (304) is installed in the first PCS pipeline (314). The first PCS pipeline (314) has a PCS heat exchange fluid inlet and a PCS heat exchange fluid outlet. The second heat exchanger (301) is installed in the second PCS pipeline (315). The PCS thermal management system (300) has a PCS cooling state and a PCS heating state. When the PCS thermal management system (300) is in the PCS cooling state, the first air conditioning pipe (123), the second air conditioning pipe (124), the third battery pipe (225), the second PCS pipe (315), the fourth battery pipe (226), and the third air conditioning pipe (125) are connected in sequence. The first PCS pipe (314) and the second PCS pipe (315) are connected. Heat exchange occurs through the second heat exchanger (301). When the PCS thermal management system (300) is in the PCS heating state, the first air conditioning pipe (123), the third air conditioning pipe (125), the fourth battery pipe (226), the second PCS pipe (315), the third battery pipe (225) and the second air conditioning pipe (124) are connected in sequence, and the first PCS pipe (314) and the second PCS pipe (315) exchange heat through the second heat exchanger (301).

5. The vehicle thermal management system according to claim 4, characterized in that, The battery thermal management system (200) also includes a battery natural cooling pipeline (227), and the dry cooler (210) is disposed in the battery natural cooling pipeline (227). The connection between the outlet of the battery natural cooling pipe (227) and the first battery pipe (223) is close to the outlet of the first water pump (202), and the connection between the inlet of the battery natural cooling pipe (227) and the first battery pipe (223) is close to the inlet of the third heat exchanger (303).

6. The vehicle thermal management system according to claim 5, characterized in that, The PCS thermal management system (300) also includes a PCS waste heat recovery pipeline (316), the connection point of which is close to the inlet of the second water pump (304) and the first PCS pipeline (314). The PCS waste heat recovery pipeline (316) exchanges heat with the first battery pipeline (223) through a third heat exchanger (303).

7. The vehicle thermal management system according to claim 5, characterized in that, The battery thermal management system (200) also includes a battery replenishment pipeline (228), a water tank (208), and a third water pump (207). The water tank (208) and the third water pump (207) are located in the battery replenishment pipeline (228). The connection between the battery replenishment pipeline (228) and the first battery pipeline (223) is close to the battery heat exchange fluid inlet. The PCS thermal management system (300) also includes a PCS replenishment pipeline. The water tank (208) and the third water pump (207) are located in the PCS replenishment pipeline. The connection between the PCS replenishment pipeline and the second PCS pipeline (315) is close to the PCS heat exchange fluid inlet.

8. The vehicle thermal management system according to claim 2, characterized in that, The air conditioning thermal management system (100) further includes a first branch (127) and a second branch (128). The connection between the first branch (127) and the fourth air conditioning pipe (126) is located upstream of the evaporator (104). The connection between the first branch (127) and the second air conditioning pipe (124) is close to the side of the condenser (102). The connection between the second branch (128) and the second air conditioning pipe (124) is close to the other side of the condenser (102). The connection between the second branch (128) and the fourth air conditioning pipe (126) is located on the other side of the condenser (102).

9. A control method for controlling a vehicle thermal management system according to any one of claims 1 to 8, characterized in that, Includes the following steps: The inlet temperature of the first water pump (202), the inlet temperature of the second water pump (304), the inlet pressure of the first water pump (202), the inlet pressure of the second water pump (304), the temperature of the ambient temperature sensor (108), the cooling command of the air conditioning thermal management system (100), and the heating command of the air conditioning thermal management system (100) are obtained. The vehicle thermal management system is controlled to perform its functions based on the inlet temperature of the first water pump (202), the inlet temperature of the second water pump (304), the inlet pressure of the first water pump (202), the inlet pressure of the second water pump (304), the temperature of the ambient temperature sensor (108), the cooling command of the air conditioning thermal management system (100), and the heating command of the air conditioning thermal management system (100).

10. The control method for a vehicle thermal management system according to claim 9, characterized in that, The steps for controlling the vehicle thermal management system to perform its functions based on the inlet temperature of the first water pump (202), the inlet temperature of the second water pump (304), the inlet pressure of the first water pump (202), the inlet pressure of the second water pump (304), the temperature displayed by the ambient temperature sensor (108), and the cooling and heating commands of the air conditioning thermal management system (100) include: When the inlet temperature of the first water pump (202) is higher than 18°C, the battery thermal management system (200) is activated and the battery cooling function is activated. When the inlet temperature of the first water pump (202) is lower than 10°C, the battery thermal management system (200) is activated and the battery heating function is activated. When the inlet pressure of the first water pump (202) is lower than 1 bar, the battery thermal management system (200) is activated and the battery automatic liquid replenishment function is activated. When the ambient temperature sensor (108) displays a temperature greater than 5°C and less than 10°C, and the inlet temperature of the first water pump (202) is less than 18°C ​​and greater than 15°C, the battery thermal management system (200) is activated and the battery self-circulation function is activated. When the inlet temperature of the second water pump (304) is higher than 55°C, the PCS thermal management system (300) is started and the PCS cooling function is running; when the inlet temperature of the second water pump (304) is lower than 30°C, the PCS thermal management system (300) is started and the PCS heating function is running. When the inlet pressure of the second water pump (304) is lower than 1 bar, the PCS thermal management system (300) is started and the PCS automatic liquid replenishment function is activated. When the ambient temperature sensor (108) displays a temperature greater than 5°C and less than 10°C, and the inlet temperature of the second water pump (304) is less than 55°C and greater than 40°C, the PCS thermal management system (300) is started and the PCS self-circulation function is activated. When the air conditioning thermal management system (100) issues a cooling command, the air conditioning thermal management system (100) starts up and the air conditioning cooling function is running. When the air conditioning thermal management system (100) issues a heating command, the air conditioning thermal management system (100) starts up and the air conditioning heating function is running. When the ambient temperature sensor (108) displays a temperature less than 0°C, and the inlet temperature of the first water pump (202) is less than 20°C and greater than 10°C, the battery thermal management system (200) is activated, and the battery natural cooling function is activated. When the battery heating and PCS heating functions are running together, and the ambient temperature sensor (108) displays a temperature below 5°C and above -10°C, the PCS thermal management system (300) is turned on and the PCS waste heat recovery function is running. Alternatively, when the battery natural cooling function is running, and the inlet temperature of the second water pump (304) is above 40°C and below 55°C, the PCS thermal management system (300) is turned on and the PCS waste heat recovery function is running.

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