Vehicle thermal management system and automobile

Abstract

The application relates to the technical field of whole vehicle thermal management, in particular to a vehicle thermal management system and an automobile. The vehicle thermal management system comprises a heat pump device provided with a water-cooled condenser on a refrigerant loop pipeline, a bypass heat auxiliary device and an outdoor heat exchange device. The bypass heat auxiliary device and the outdoor heat exchange device can be opened alternatively or simultaneously to improve the heating efficiency of the heat pump device. An air conditioner heater device is arranged on a passenger cabin heating loop. The passenger cabin heating loop is in communication with the water side of the water-cooled condenser. A battery heating loop is connected with the passenger cabin heating loop through a heat exchanger. The battery heating loop exchanges heat with the passenger cabin heating loop through the heat exchanger to heat the battery. The thermal management system coordinates the arrangement of public pipelines and heat exchange devices among independent thermal management loops. Different working modes are adopted under different ambient temperatures to meet the passenger cabin heating and battery heating, PTC is cancelled, energy consumption is reduced, cost is reduced, and the cruising range is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of whole vehicle thermal management, and particularly relates to a vehicle thermal management system and an automobile. BACKGROUND

[0002] A key component of a new energy electric vehicle is a power battery, and the performance and service life of the power battery largely determine the performance and service life of the whole vehicle. The endurance mileage of the battery is also an important indicator for evaluating the performance of the whole vehicle. The power battery must work in an appropriate temperature range to achieve the best performance. When the battery is charged, the temperature rises quickly and easily exceeds the optimal working temperature range, so the battery must be cooled by a refrigeration system.

[0003] In related technologies, the whole vehicle thermal management circuit of an electric vehicle mostly independently sets and manages the thermal management of the cab and the thermal management of the fuel cell, and does not perform integrated thermal management in a coordinated and unified manner, so that the overall thermal management energy consumption of the fuel cell vehicle is high, and part of the thermal energy cannot be reused. Therefore, a new solution is needed to solve the above problems. SUMMARY

[0004] In related technologies, the whole vehicle thermal management circuit of an electric vehicle mostly independently sets and manages the thermal management of the cab and the thermal management of the fuel cell, and does not perform integrated thermal management in a coordinated and unified manner, so that the overall thermal management energy consumption of the fuel cell vehicle is high, and part of the thermal energy cannot be reused. Therefore, a new solution is needed to solve the above problems.

[0005] In a first aspect, an embodiment of the present application provides a vehicle thermal management system, which comprises:

[0006] A refrigerant circuit, which is provided with a heat pump device provided with a water-cooled condenser, a bypass heat auxiliary device, and an outdoor heat exchange device on a pipeline. The bypass heat auxiliary device and the outdoor heat exchange device can be opened alternatively or simultaneously to improve the heating efficiency of the heat pump device.

[0007] A passenger compartment heating circuit, which is provided with a circulating water. The passenger compartment heating circuit is provided with an air conditioner heater device, and the passenger compartment heating circuit is in water-side communication with the water-cooled condenser.

[0008] A battery heating circuit, which is partially arranged in a battery. The battery heating circuit is provided with circulating water, and the battery heating circuit is connected to the passenger compartment heating circuit through a heat exchanger. The battery heating circuit can exchange heat with the passenger compartment heating circuit through the heat exchanger to heat the battery.

[0009] In combination with the first aspect, in an embodiment, the heat pump device comprises:

[0010] A compressor, an output port of which is in communication with an input port of the water-cooled condenser through a pipeline of the refrigerant circuit.

[0011] A gas-liquid separator, an output port of which is communicated with the input port of the compressor through a refrigerant circuit pipeline, and an input port of the gas-liquid separator is communicated with the output port of the water-cooled condenser.

[0012] In combination with the first aspect, in an embodiment, the bypass heat auxiliary device comprises:

[0013] A first bypass pipeline, an input side of which is communicated with the output port of the compressor, and a first control valve is arranged at an output side of the first bypass pipeline, and the first control valve is communicated with the input port of the gas-liquid separator;

[0014] A first expansion valve is arranged on the first bypass pipeline.

[0015] In combination with the first aspect, in an embodiment, the bypass heat auxiliary device further comprises:

[0016] A second bypass pipeline, an input side of which is communicated with the output port of the water-cooled condenser, and an output side of the second bypass pipeline is communicated with the input port of the gas-liquid separator;

[0017] An air-conditioning evaporator is arranged on the second bypass pipeline, and the air-conditioning evaporator is positioned corresponding to the air-conditioning heater device;

[0018] A second expansion valve is arranged on the second bypass pipeline, and the second expansion valve is communicated with an input side of the air-conditioning evaporator.

[0019] In combination with the first aspect, in an embodiment, the bypass heat auxiliary device further comprises:

[0020] A third bypass pipeline, an input side of which is communicated with the output port of the water-cooled condenser through the second bypass pipeline, and an output side of the third bypass pipeline partially penetrates through the battery heating circuit and is communicated with the input port of the gas-liquid separator;

[0021] A third expansion valve is arranged on the third bypass pipeline.

[0022] In combination with the first aspect, in an embodiment, the battery heating circuit comprises:

[0023] A battery heating pipeline, on which a first water pump is arranged, and the battery heating pipeline penetrates through the battery, and the battery heating pipeline is arranged with the heat exchanger, and the heat exchanger is arranged with two pipelines, one of which is communicated with the battery heating pipeline, and the other of which is communicated with the passenger cabin heating circuit;

[0024] A battery cooler is arranged on the battery heating pipeline, and the second bypass pipeline penetrates through the battery cooler.

[0025] With reference to the first aspect, in an implementation form of the outdoor heat exchange device, the outdoor heat exchanger is arranged on the refrigerant circuit pipeline, and an outlet of the outdoor heat exchanger is in communication with or cut off from the input of the gas-liquid separator.

[0026] With reference to the first aspect, in an implementation form of the outdoor heat exchange device, the outdoor heat exchanger is arranged on the refrigerant circuit pipeline, and an outlet of the outdoor heat exchanger is in communication with or cut off from the input of the gas-liquid separator.

[0027] With reference to the first aspect, in an implementation form of the outdoor heat exchange device, the outdoor heat exchanger is arranged on the refrigerant circuit pipeline, and an outlet of the outdoor heat exchanger is in communication with or cut off from the input of the gas-liquid separator.

[0028] The second aspect provides a vehicle thermal management control method using the vehicle thermal management system according to any one of the above aspects, which comprises:

[0029] The outside temperature value is collected, and the vehicle thermal management system is controlled to perform a heating action according to the outside temperature parameter and a vehicle instruction; wherein,

[0030] When the outside temperature value is above -10℃, and the vehicle issues an instruction to heat the passenger cabin, the outdoor heat exchange device and the heat pump device are started to heat the refrigerant in the refrigerant circuit pipeline, and the circulating water in the passenger cabin heating circuit pipeline is kept circulating to heat the air conditioner heater device;

[0031] When the outside temperature value is in the range of -30℃ to -10℃, and the vehicle issues an instruction to heat the passenger cabin, the bypass heat auxiliary device and the heat pump device are started to heat the refrigerant in the refrigerant circuit pipeline, and the circulating water in the passenger cabin heating circuit pipeline is kept circulating to heat the air conditioner heater device;

[0032] When the outside temperature value is in the range of -30℃ to 0℃, and the vehicle issues an instruction to heat the passenger cabin and the battery 7, the bypass heat auxiliary device and the heat pump device are started to heat the refrigerant in the refrigerant circuit pipeline, and the circulating water in the passenger cabin heating circuit pipeline and the battery heating circuit is kept circulating to heat the air conditioner heater device and the battery.

[0033] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0034] The thermal management system of the present application can adopt different working modes to meet the heating of the passenger cabin and the battery under different environmental temperatures by coordinating the arrangement of the public pipeline and the heat exchange device between the independent thermal management circuits, which can realize the cancellation of the PTC, reduce the energy consumption, reduce the cost, and improve the cruising range. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0036] Figure 1 A schematic diagram of the heat management system in the embodiments of the present application;

[0037] Figure 2 A schematic diagram of the components used by the heat management system in the embodiments of the present application in the first and third working conditions;

[0038] Figure 3 A schematic diagram of the components used by the heat management system in the embodiments of the present application in the second working condition;

[0039] Figure 4 A schematic diagram of the components used by the heat management system in the embodiments of the present application in the fourth working condition

[0040] Figure 5 A schematic diagram of the components used by the heat management system in the embodiments of the present application in the fifth and sixth working conditions.

[0041] In the figure: 1, refrigerant circuit; 11, water-cooled condenser; 12, compressor; 13, gas-liquid separator; 2, passenger cabin heating circuit; 21, first multi-way water valve; 3, outdoor heat exchange device; 31, outdoor heat exchanger; 32, fourth expansion valve; 4, air conditioning heater device; 41, front air conditioning internal heater; 42, rear air conditioning internal heater; 5, battery heating circuit; 51, battery heating pipeline; 52, heat exchanger; 53, battery cooler; 54, first water pump; 55, second multi-way water valve; 61, first bypass pipeline; 62, first expansion valve; 63, second bypass pipeline; 64, air conditioning evaporator; 65, second expansion valve; 66, first control valve; 7, battery; 8, third bypass pipeline; 81, third expansion valve; 91, three-way valve. DETAILED DESCRIPTION

[0042] In order to make the person skilled in the art better understand the present application, 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 of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] In the related art, the driver cabin thermal management and fuel cell thermal management of the whole vehicle thermal management loop of the electric vehicle are independently set and have poor coordination, which leads to poor energy utilization and high overall thermal management energy consumption of the battery vehicle.

[0044] Embodiments of the present application provide a vehicle thermal management system, as shown in the accompanying drawings, which comprises a refrigerant loop 1, a passenger cabin heating loop 2 and a battery heating loop 5; wherein, Figure 1

[0045] The refrigerant loop 1 is provided with a heat pump device provided with a water-cooled condenser 11, a bypass heat auxiliary device and an outdoor heat exchange device 3 on the pipeline, and the bypass heat auxiliary device and the outdoor heat exchange device 3 can be opened alternatively or simultaneously to improve the heating efficiency of the heat pump device; the passenger cabin heating loop 2 is provided with an air conditioner heater device 4 and is communicated with the water side of the water-cooled condenser 11; the battery heating loop 5 is partially arranged in the battery 7, and the battery heating loop 5 is communicated with the passenger cabin heating loop 2 through a heat exchanger 52, and the battery heating loop 5 can exchange heat with the passenger cabin heating loop 2 through the heat exchanger 52 to heat the battery 7.

[0046] It should be noted that, Figures 1-5 The connection lines between the devices in the above-mentioned embodiments are pipeline devices, wherein the solid lines represent pipelines in which refrigerant circulates, and the dashed lines represent pipelines in which circulating water for heat exchange circulates.

[0047] It should be noted that, in the present application, the heat source of the heat management system in the refrigerant loop 1 is provided with two heat auxiliary modes, i.e., the bypass heat auxiliary device and the outdoor heat exchange device 3. The two devices can be used simultaneously or individually to adapt to different working conditions. When the external temperature environment is in a micro-low temperature environment, the outdoor heat exchange device 3 can normally absorb heat in the air to heat the refrigerant flowing through the outdoor heat exchange device 3, so that the temperature of the refrigerant flowing to the water-cooled condenser 11 is increased and heat exchange is performed with the passenger cabin heating loop 2, so that the function of passenger cabin heating is realized with less energy consumption. When the temperature decreases, the heat exchange efficiency of the outdoor heat exchange device 3 decreases, and the bypass heat auxiliary device is needed to accelerate the heating working efficiency of the heat pump device.

[0048] Further, the refrigerant loop 1 comprises a compressor 12 and a gas-liquid separator 13; wherein,

[0049] The output port of the compressor 12 is communicated with the input port of the water-cooled condenser 11 through a refrigerant pipeline; the output port of the gas-liquid separator 13 is communicated with the input port of the compressor 12 through a refrigerant pipeline, and the input port of the gas-liquid separator 13 is communicated with the output port of the water-cooled condenser 11.​

[0050] It should be noted that the compressor 12 sucks low-temperature and low-pressure refrigerant into the machine, rotates the rotor inside the compressor 12 driven by the motor, and discharges the refrigerant compressed into high-temperature and high-pressure gas. During the pressurization process, the refrigerant releases heat, so that the high-temperature and high-pressure gas discharged by the compressor 12 has a higher temperature. Then, the high-temperature and high-pressure gas is sent into the gas side of the water-cooled condenser 11 for cooling, so that it is cooled and condensed into high-pressure liquid. The liquid high-pressure refrigerant is expanded and expanded through the expansion valve to become low-temperature and low-pressure refrigerant, and is then sucked into the compressor 12 to complete a complete heat pump compressor refrigeration or heating cycle. Therefore, an expansion valve is arranged on the pipeline connection between the water-cooled condenser 11 and the gas-liquid separator 13 in the refrigerant circuit 1. Further, the gas-liquid separator 13 is used to prevent liquid refrigerant from impacting the compressor and ensure the safe and normal operation of the compressor 12.

[0051] It should be noted that the outdoor heat exchange device 3 in the present application absorbs external air heat, and has low energy consumption. However, it is affected by temperature and has low working efficiency under extreme working conditions, and cannot meet the heat management demand. Therefore, it needs to cooperate with the bypass heat auxiliary device to complete the heat management under various working conditions.

[0052] Further, the pipeline of the refrigerant circuit 1 is provided with a switching valve at the pipeline branch to switch the flow direction of the coolant, so that the heat source providing mode is switched between the two devices, or both devices are opened at the same time.

[0053] In some preferred embodiments, the bypass heat auxiliary device comprises: a first bypass heat auxiliary assembly, the first bypass heat auxiliary assembly comprising a first bypass pipeline 61 and a first control valve 66; wherein,

[0054] The first bypass pipeline 61 is communicated with the output port of the compressor 12 at the input side, the first bypass pipeline 61 is provided with the first control valve 66 at the output side, the first control valve 66 is communicated with the input port of the gas-liquid separator 13, and the first expansion valve 62 is arranged on the first bypass pipeline 61.

[0055] It can be understood that, as shown in Figure 1 The working principle of the bypass heat auxiliary device and the heat pump device in the above embodiment comprises that the pipeline of the refrigerant circuit 1 provided with the compressor 12 and the gas-liquid separator 13 is arranged in parallel with the first bypass pipeline 61. That is, the high-temperature and high-pressure refrigerant discharged from the compressor 12 passes through the first bypass pipeline 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and the other part enters the water-cooled condenser 11 to perform heat exchange.

[0056] It should be noted that the first expansion valve 62 arranged in parallel can accelerate the conversion efficiency of the liquid high-pressure refrigerant into low-temperature and low-pressure refrigerant, thereby improving the working efficiency of the compressor 12 and the heating efficiency of the heat pump device.

[0057] In some preferred embodiments, the bypass heat-assisted device further comprises a second bypass heat-assisted component, which comprises a second bypass pipeline 63 and an air-conditioning evaporator 64; wherein,

[0058] The second bypass pipeline 63 is in communication with the outlet of the water-cooled condenser 11 at its input side, and the outlet of the second bypass pipeline 63 is in communication with the input of the gas-liquid separator 13; the air-conditioning evaporator 64 is arranged on the second bypass pipeline 63, and the air-conditioning evaporator 64 corresponds to the position of the air-conditioning heater device 4; and the second expansion valve 65 is arranged on the second bypass pipeline 63 and in communication with the input side of the air-conditioning evaporator 64.

[0059] It is worth noting that the second expansion valve 65 is used to convert the high-pressure refrigerant output by the water-cooled condenser 11 into low-temperature and low-pressure refrigerant through expansion. The air-conditioning evaporator 64 can utilize the characteristic that liquid low-temperature refrigerant is easy to evaporate at low pressure to convert into steam and absorb heat for heating the air-conditioning heater device 4.

[0060] In some preferred embodiments, the bypass heat-assisted device further comprises a third bypass heat-assisted component, which comprises a third bypass pipeline 8 and a third expansion valve 81; wherein,

[0061] The third bypass pipeline 8 is in communication with the outlet of the water-cooled condenser 11 at its input side through the second bypass pipeline 63, and the outlet side of the third bypass pipeline 8 partially penetrates the battery heating loop 5 and is in communication with the input of the gas-liquid separator 13; and the third expansion valve 81 is arranged on the third bypass pipeline 8.

[0062] It can be understood that the working principle of the third bypass heat-assisted component is similar to that of the first bypass heat-assisted component, and both utilize the expansion valve to accelerate the working efficiency of the heat pump. Further, the third bypass pipeline 8 penetrates the battery heating loop 5 and can absorb the waste heat generated after the battery heating loop 5 works.

[0063] In some optional embodiments, at least one pipeline control valve is arranged on each of the first bypass pipeline 61, the second bypass pipeline 63 and the third bypass pipeline 8 to cut off or conduct the pipeline.

[0064] Preferably, a first control valve 66 is arranged at the input of the gas-liquid separator 13 of the heat pump device, and the first control valve 66 is in communication with the first bypass pipeline 61, the second bypass pipeline 63, the third bypass pipeline 8 and the input of the gas-liquid separator 13, so that the above-mentioned pipelines can be cut off through the first control valve 66, and the opening and closing of the above-mentioned first bypass heat-assisted component, second bypass heat-assisted component and third bypass heat-assisted component can be realized.

[0065] In some specific embodiments, the battery heating circuit 5 comprises:

[0066] The battery heating pipe 51 is provided with the first water pump 54 and is arranged in the battery 7. The heat exchanger 52 is arranged on the battery heating pipe 51. The heat exchanger 52 is provided with two pipes, one of which is in communication with the battery heating pipe 51, and the other is in communication with the passenger cabin heating circuit 2. The battery cooler 53 is arranged on the battery heating pipe 51, and the second bypass pipe 63 is arranged in the battery cooler 53.

[0067] It can be understood that the battery cooler 53 is partially provided with the second bypass pipe 63. The second bypass pipe 63 can absorb the waste heat of the battery cooler 53 to heat the passenger cabin, thereby saving energy consumption.

[0068] In some specific embodiments, the outdoor heat exchange device 3 comprises an outdoor heat exchanger 31 and a fourth expansion valve 32. Wherein,

[0069] The outdoor heat exchanger 31 is arranged on the pipe of the refrigerant circuit 1, and the output of the outdoor heat exchanger 31 can be in communication with or cut off from the input of the gas-liquid separator 13. The fourth expansion valve 32 is arranged on the input of the outdoor heat exchanger 31.

[0070] It is worth noting that the outdoor heat exchanger 31 can absorb heat from the air to heat the refrigerant flowing therethrough.

[0071] In some optional embodiments, the pipe of the refrigerant circuit 1 is in communication with the input of the compressor 12 from the output of the compressor 12, sequentially passes through the water-cooled condenser 11, the fourth expansion valve 32, the outdoor heat exchanger 31, and the gas-liquid separator 13.

[0072] Further, the passenger cabin heating circuit 2 is provided with the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 of the air conditioner heater device 4 in series. Preferably, the second bypass heat auxiliary assembly also comprises two sets of second bypass pipes 63 and air conditioner evaporators 64, and the two sets of air conditioner evaporators 64 correspond to the front air conditioner inner heater 41 and the rear air conditioner inner heater 42, respectively.

[0073] In some preferred embodiments, the passenger cabin heating circuit 2 is provided with a first multi-way water valve 21 and a water pump. The first multi-way water valve 21 is used to deliver the circulating water after passing through the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 back to the water side of the water-cooled condenser 11 to continue heating the circulating water, or deliver the circulating water after passing through the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 to the heat exchanger 52 to exchange heat with the battery heating circuit 5.

[0074] Furthermore, the battery heating pipeline 51 is also provided with a second multi-way water valve 55 and a first water pump 54 , so that the cooling water in the battery heating pipeline 51 and the passenger compartment heating circuit 2 forms a loop.

[0075] This application provides specific control methods for a vehicle thermal management system under various operating conditions, including:

[0076] First working condition: When the outside temperature is above -10℃, the outdoor heat exchange equipment 3 and the heat pump equipment are used to provide heat to the passenger compartment. Figure 2 As shown, in the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 enters the water-cooled condenser 11, and the water-cooled condenser 11 releases the heat of the refrigerant and then enters the outdoor heat exchanger 31 after throttling through the fourth expansion valve 32. The outdoor heat exchanger 31 absorbs heat from the air, and then enters the compressor after separation through the gas-liquid separator 13; the hot water after absorbing the heat from the refrigerant side of the water side of the water-cooled condenser 11 flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump; the cold air in the passenger compartment is heated after passing through the front and rear air-conditioning box heaters, thereby realizing the function of heating the passenger compartment.

[0077] Under the second working condition: the outside temperature is between -30℃ and -10℃, the heating scheme for the passenger compartment is to use a heat pump device with a bypass circuit to provide heat to the passenger compartment, such as Figure 2 As shown, in the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 passes through the first bypass line 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and enters the water-cooled condenser 11 in the other way. After the water-cooled condenser 11, it passes through the three-way valve 91 and then the third bypass line 8 and the third expansion valve 81. After being regulated by the third expansion valve 81, it passes through the battery cooler 53 and then is separated by the gas-liquid separator 13 before entering the compressor; the hot water after the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, thereby realizing the function of heating the passenger compartment.

[0078] Under the third working condition, the outside temperature is between -30℃ and -10℃. The heating scheme for the passenger compartment is to use a heat pump system with a bypass circuit to provide heat to the passenger compartment. Figure 1As shown, the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass pipe 61 to the gas-liquid separator 13, and the other passes through the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant, and then passes through the fourth expansion valve 32, the outdoor heat exchanger 31, the first control valve 66, the gas-liquid separator 13, and the compressor 12. The hot water from the water-cooled condenser 11 after absorbing the heat of the refrigerant passes through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump, thereby realizing the function of heating the passenger compartment.

[0079] In the fourth working condition, the outside temperature is -30℃ to -0℃, and the battery heating scheme uses a heat pump system with a bypass circuit to provide heat for the battery. Figure 4 As shown, the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass pipe 61 to the gas-liquid separator 13, and the other passes through the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant, and then passes through the fourth expansion valve 32, the outdoor heat exchanger 31, the first control valve 66, the gas-liquid separator 13, and the compressor 12. The hot water from the water-cooled condenser 11 after absorbing the heat of the refrigerant passes through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump, thereby realizing the function of heating the passenger compartment.

[0080] In the fourth working condition, the outside temperature is -30℃ to -0℃, and the battery heating scheme uses a heat pump system with a bypass circuit to provide heat for the battery. Figure 5As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, the first expansion valve 62 and returns to the gas-liquid separator 13, and the other way enters the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant and then passes through the fourth expansion valve 32. After being regulated by the fourth expansion valve 32, it passes through the first control valve 66, and finally passes through the gas-liquid separator 13 for separation before entering the compressor; the hot water on the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side and flows through the front air-conditioning heater 41 and the rear air-conditioning heater 42 (the air-conditioning fan is not turned on), then passes through the heat exchanger 52, passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump; in the battery circuit, the water pump transports the battery circuit water to the heat exchanger 52. The hot water on the air-conditioning side of the heat exchanger 52 heats the water in the battery 7 circuit and then passes through the battery 7, then passes through the second multi-way water valve 55 to regulate the circuit, and then forms a circuit through the water pump.

[0081] Under the sixth working condition, the outside temperature is -30℃~-0℃, and the solution for heating the passenger compartment and the battery at the same time is: use a heat pump system with a bypass circuit to provide heat to the battery and the passenger compartment; Figure 5 As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, the first expansion valve 62, and returns to the gas-liquid separator 13. The other path enters the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant and then passes through the fourth expansion valve 32. After being regulated by the fourth expansion valve 32, it passes through the first control valve 66, and finally is separated by the gas-liquid separator 13 before entering the compressor; the hot water on the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side and flows through the front air-conditioning heater 41 and the rear air-conditioning heater 42 to heat the passenger compartment, then passes through the heat exchanger 52, passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump; in the battery circuit, the water pump transports the battery circuit water to the heat exchanger 52. The hot water on the air-conditioning side of the heat exchanger 52 heats the water in the battery 7 circuit and then passes through the battery 7, then passes through the second multi-way water valve 55 to regulate the circuit, and then completes the circuit through the water pump.

[0082] In a second aspect, the present application provides a car comprising: a refrigerant circuit 1, a passenger compartment heating circuit 2, and a battery heating circuit 5; wherein,

[0083] The refrigerant circuit 1 is provided with a heat pump device provided with a water-cooled condenser 11, a bypass heat auxiliary device and an outdoor heat exchange device 3, which can be opened alternatively or simultaneously to improve the heating efficiency of the heat pump device; a passenger cabin heating circuit 2, which is provided with an air conditioner heater device 4 and is in water-side communication with the water-cooled condenser 11; and a battery heating circuit 5, which is partially arranged in a battery 7 and is in communication with the passenger cabin heating circuit 2 through a heat exchanger 52, so that the battery heating circuit 5 can exchange heat with the passenger cabin heating circuit 2 through the heat exchanger 52 to heat the battery 7.

[0084] It is worth noting that the heat source of the heat management system in the refrigerant circuit 1 in the present application is provided with two heat auxiliary modes of the bypass heat auxiliary device and the outdoor heat exchange device 3. The two devices can be used simultaneously or individually to adapt to different working conditions. When the external temperature environment is in a micro-low temperature environment, the outdoor heat exchange device 3 can normally absorb heat in the air to heat the refrigerant flowing through the outdoor heat exchange device 3, so that the temperature of the refrigerant flowing to the water-cooled condenser 11 is increased and heat exchange with the passenger cabin heating circuit 2 is performed to realize the function of passenger cabin heating with less energy consumption. When the temperature is reduced, the heat exchange efficiency of the outdoor heat exchange device 3 is reduced, and the bypass heat auxiliary device is needed to speed up the heating efficiency of the heat pump device.

[0085] Further, the refrigerant circuit 1 comprises a compressor 12 and a gas-liquid separator 13, wherein,

[0086] The compressor 12 is in communication with the input port of the water-cooled condenser 11 through a refrigerant pipeline, and the gas-liquid separator 13 is in communication with the input port of the compressor 12 through a refrigerant pipeline, and the input port of the gas-liquid separator 13 is in communication with the output port of the water-cooled condenser 11.

[0087] It should be noted that the compressor 12 sucks low-temperature and low-pressure refrigerant into the machine, rotates the rotor inside the compressor 12 driven by the motor, and discharges the refrigerant compressed into high-temperature and high-pressure gas. During the pressurization process, the refrigerant releases heat, so that the high-temperature and high-pressure gas discharged by the compressor 12 has a higher temperature. Then, the high-temperature and high-pressure gas is sent into the gas side of the water-cooled condenser 11 for cooling, so that it is cooled and condensed into high-pressure liquid. The liquid high-pressure refrigerant is expanded and expanded through the expansion valve to become low-temperature and low-pressure refrigerant, and is then sucked into the compressor 12 to complete a complete heat pump compressor refrigeration or heating cycle. Therefore, an expansion valve is arranged on the pipeline connection between the water-cooled condenser 11 and the gas-liquid separator 13 in the refrigerant circuit 1. Further, the gas-liquid separator 13 is used to prevent liquid refrigerant from impacting the compressor and ensure the safe and normal operation of the compressor 12.

[0088] It should be noted that the outdoor heat exchange device 3 in the present application absorbs external air heat, and has low energy consumption. However, it is affected by temperature and has low working efficiency under extreme working conditions, and cannot meet the heat management demand. Therefore, it needs to cooperate with the bypass heat auxiliary device to complete the heat management under various working conditions.

[0089] Further, the pipeline of the refrigerant circuit 1 is provided with a switching valve at the pipeline branch to switch the flow direction of the coolant, so that the heat source providing mode is switched between the two devices, or both devices are opened at the same time.

[0090] In some preferred embodiments, the bypass heat auxiliary device comprises: a first bypass heat auxiliary assembly, the first bypass heat auxiliary assembly comprising a first bypass pipeline 61 and a first control valve 66; wherein,

[0091] The first bypass pipeline 61 is connected to the output port of the compressor 12, the first bypass pipeline 61 is provided with the first control valve 66 at the output side, the first control valve 66 is connected to the input port of the gas-liquid separator 13, and the first expansion valve 62 is arranged on the first bypass pipeline 61.

[0092] It can be understood that, as shown in Figure 1 The working principle of the bypass heat auxiliary device and the heat pump device in the above embodiment comprises that the pipeline of the refrigerant circuit 1 provided with the compressor 12 and the gas-liquid separator 13 is connected in parallel with the first bypass pipeline 61. That is, the high-temperature and high-pressure refrigerant discharged from the compressor 12 passes through the first bypass pipeline 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and the other part enters the water-cooled condenser 11 to perform heat exchange.

[0093] It should be noted that the first expansion valve 62 arranged in parallel can accelerate the conversion efficiency of the liquid high-pressure refrigerant into low-temperature and low-pressure refrigerant, thereby improving the working efficiency of the compressor 12 and the heating efficiency of the heat pump device.

[0094] In some preferred embodiments, the bypass heat auxiliary device further comprises: a second bypass heat auxiliary component, which comprises a second bypass line 63 and an air conditioning evaporator 64; wherein,

[0095] The second bypass line 63, the input side of which can be connected to the output port of the water-cooled condenser 11, and the output side of the second bypass line 63 is connected to the input port of the gas-liquid separator 13; the air-conditioning evaporator 64, which is arranged on the second bypass line 63, and the position of the air-conditioning evaporator 64 corresponds to the position of the air-conditioning heater device 4; the second expansion valve 65, which is arranged on the second bypass line 63, and the second expansion valve 65 is connected to the input side of the air-conditioning evaporator 64.

[0096] It is worth noting that the second expansion valve 65 is used to convert the high-pressure refrigerant output by the water-cooled condenser 11 into low-temperature, low-pressure refrigerant by expanding it. The air conditioning evaporator 64, taking advantage of the liquid low-temperature refrigerant's tendency to evaporate at low pressure, converts it into vapor, which absorbs heat to heat the air conditioning heater 4.

[0097] In some preferred embodiments, the bypass heat auxiliary device further comprises: a third bypass heat auxiliary component, which comprises a third bypass pipeline 8 and a third expansion valve 81; wherein,

[0098] The third bypass line 8 , whose input side can be connected to the output port of the water-cooled condenser 11 through the second bypass line 63 , and the output side portion of the third bypass line 8 passes through the battery heating circuit 5 and is connected to the input port of the gas-liquid separator 13 ; a third expansion valve 81 , which is provided on the third bypass line 8 .

[0099] It is understood that the operating principle of the third bypass heat assist assembly is similar to that of the first bypass heat assist assembly, both utilizing an expansion valve to accelerate the efficiency of the heat pump. Furthermore, the third bypass line 8 passes through the battery heating circuit 5 to absorb excess heat generated by the battery heating circuit 5 after operation.

[0100] In some optional embodiments, at least one pipeline control valve is provided on each of the first bypass pipeline 61 , the second bypass pipeline 63 and the third bypass pipeline 8 to cut off or open the pipeline.

[0101] Preferably, a first control valve 66 is provided at the input port of the gas-liquid separator 13 of the heat pump equipment. The first control valve 66 is connected to the first bypass pipeline 61, the second bypass pipeline 63, the third bypass pipeline 8 and the input port of the gas-liquid separator 13. Therefore, the first control valve 66 can cut off the above pipelines to realize the opening and closing of the above-mentioned first bypass thermal auxiliary component, the second bypass thermal auxiliary component and the third bypass thermal auxiliary component.

[0102] In some specific embodiments, the battery heating circuit 5 includes:

[0103] A battery heating circuit 51 is provided with a first water pump 54 and is arranged in the battery 7. The battery heating circuit 51 is provided with the heat exchanger 52, and the heat exchanger 52 is provided with two circuits, one of which is in communication with the battery heating circuit 51, and the other is in communication with the passenger cabin heating circuit 2. A battery cooler 53 is arranged on the battery heating circuit 51, and the second bypass circuit 63 is arranged in the battery cooler 53.

[0104] It can be understood that the battery cooler 53 is partially provided with the second bypass circuit 63, and the second bypass circuit 63 can absorb the working waste heat of the battery cooler 53 to heat the passenger cabin, thereby saving energy consumption.

[0105] In some specific embodiments, the outdoor heat exchange device 3 comprises an outdoor heat exchanger 31 and a fourth expansion valve 32, wherein,

[0106] The outdoor heat exchanger 31 is arranged on the refrigerant circuit 1 circuit, and the output of the outdoor heat exchanger 31 can be in communication with or cut off from the input of the gas-liquid separator 13. The fourth expansion valve 32 is arranged on the input of the outdoor heat exchanger 31.

[0107] It is worth noting that the outdoor heat exchanger 31 can absorb heat from the air to heat the refrigerant flowing through it.

[0108] In some optional embodiments, the circuit of the refrigerant circuit 1 is sequentially arranged from the output of the compressor 12, through the water-cooled condenser 11, the fourth expansion valve 32, the outdoor heat exchanger 31, and the gas-liquid separator 13, and is in communication with the input of the compressor 12.

[0109] Further, the passenger cabin heating circuit 2 circuit is provided with the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 of the air conditioner heater device 4 in series. Preferably, the second bypass heat auxiliary assembly also comprises two groups of second bypass circuits 63 and air conditioner evaporators 64, and the two groups of air conditioner evaporators 64 correspond to the front air conditioner inner heater 41 and the rear air conditioner inner heater 42, respectively.

[0110] In some preferred embodiments, the passenger cabin heating circuit 2 circuit is provided with a first multi-way water valve 21 and a water pump. The first multi-way water valve 21 is used to deliver the circulating water after passing through the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 back to the water side of the water-cooled condenser 11 to continue heating the circulating water, or to deliver the circulating water after passing through the front air conditioner inner heater 41 and the rear air conditioner inner heater 42 to the heat exchanger 52, so that the circulating water exchanges heat with the battery heating circuit 5.

[0111] Furthermore, the battery heating pipeline 51 is also provided with a second multi-way water valve 55 and a first water pump 54 , so that the cooling water in the battery heating pipeline 51 and the passenger compartment heating circuit 2 forms a loop.

[0112] In a third aspect, the present application provides a vehicle thermal management control method utilizing the above-mentioned vehicle thermal management system, comprising:

[0113] Collect the outside temperature value, and control the vehicle thermal management system to perform heating action according to the outside temperature parameter and vehicle instructions; wherein,

[0114] When the outside temperature is above -10°C and the vehicle issues a passenger compartment heating command, the outdoor heat exchange device 3 and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit 1 pipeline, while the circulating water in the passenger compartment heating circuit 2 pipeline is kept circulating, so as to increase the temperature of the air-conditioning heater device 4; when the outside temperature is between -30°C and -10°C and the vehicle issues a passenger compartment heating command, the bypass thermal auxiliary device and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit 1 pipeline, while the circulating water in the passenger compartment heating circuit 2 pipeline is kept circulating, so as to increase the temperature of the air-conditioning heater device 4; when the outside temperature is between -30°C and 0°C and the vehicle issues a passenger compartment heating command and battery 7, the bypass thermal auxiliary device and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit 1 pipeline, while the circulating water in the passenger compartment heating circuit 2 pipeline and the battery heating circuit 5 pipeline is kept circulating, so as to increase the temperature of the air-conditioning heater device 4 and the battery 7.

[0115] Furthermore, the present application provides a specific implementation method for various temperature conditions and instructions in combination with the above-mentioned vehicle thermal management control method, which includes:

[0116] First working condition: When the outside temperature is above -10℃, the outdoor heat exchange equipment 3 and the heat pump equipment are used to provide heat to the passenger compartment. Figure 2 As shown, in the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 enters the water-cooled condenser 11, and the water-cooled condenser 11 releases the heat of the refrigerant and then enters the outdoor heat exchanger 31 after throttling through the fourth expansion valve 32. The outdoor heat exchanger 31 absorbs heat from the air, and then enters the compressor after separation through the gas-liquid separator 13; the hot water after absorbing the heat from the refrigerant side of the water side of the water-cooled condenser 11 flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump; the cold air in the passenger compartment is heated after passing through the front and rear air-conditioning box heaters, thereby realizing the function of heating the passenger compartment.

[0117] Under the second working condition: the outside temperature is between -30℃ and -10℃, the heating scheme for the passenger compartment is to use a heat pump device with a bypass circuit to provide heat to the passenger compartment, such as Figure 2As shown, in the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass circuit 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and the other passes through the water-cooled condenser 11. After the water-cooled condenser 11 releases the heat of the refrigerant, it passes through the three-way valve 91, then through the third bypass circuit 8 and the third expansion valve 81. After being adjusted by the third expansion valve 81, it passes through the battery cooler 53, then separates in the gas-liquid separator 13 and enters the compressor. The hot water after absorbing the heat of the refrigerant on the water side of the water-cooled condenser 11 flows through the front air conditioner internal heater 41 and the rear air conditioner internal heater 42, then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, realizing the function of heating the passenger compartment.

[0118] In the third working condition, the outside temperature is between -30°C and -10°C, and the heating scheme for the passenger compartment is to use a heat pump system with a bypass circuit to provide heat to the passenger compartment. Figure 1 As shown, in the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass circuit 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and the other passes through the water-cooled condenser 11. After the water-cooled condenser 11 releases the heat of the refrigerant, it passes through the three-way valve 91, then through the third bypass circuit 8 and the third expansion valve 81. After being adjusted by the third expansion valve 81, it passes through the battery cooler 53, then separates in the gas-liquid separator 13 and enters the compressor. The hot water after absorbing the heat of the refrigerant on the water side of the water-cooled condenser 11 flows through the front air conditioner internal heater 41 and the rear air conditioner internal heater 42, then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, realizing the function of heating the passenger compartment.

[0119] In the fourth working condition, the outside temperature is between -30°C and -0°C, and the battery heating scheme includes using a heat pump system with a bypass circuit to provide heat to the battery. Figure 4 As shown, in the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass circuit 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and the other passes through the water-cooled condenser 11. After the water-cooled condenser 11 releases the heat of the refrigerant, it passes through the three-way valve 91, then through the third bypass circuit 8 and the third expansion valve 81. After being adjusted by the third expansion valve 81, it passes through the battery cooler 53, then separates in the gas-liquid separator 13 and enters the compressor. The hot water after absorbing the heat of the refrigerant on the water side of the water-cooled condenser 11 flows through the front air conditioner internal heater 41 and the rear air conditioner internal heater 42, then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, realizing the function of heating the passenger compartment.

[0120] In the fifth working condition, the battery heating scheme uses a heat pump system with a bypass circuit to provide heat for the battery when the outside temperature is -30°C to -0°C. Figure 5 As shown in the figure, the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, passes through the first expansion valve 62, returns to the gas-liquid separator 13, and the other passes into the water-cooled condenser 11. The water-cooled condenser 11 releases heat from the refrigerant, and then passes through the fourth expansion valve 32. After being adjusted by the fourth expansion valve 32, it passes through the first control valve 66, and finally enters the compressor after being separated by the gas-liquid separator 13. The hot water on the water side of the water-cooled condenser 11 absorbs heat on the refrigerant side, flows through the front air conditioner internal heater 41 and the rear air conditioner internal heater 42 (the air conditioner fan is not turned on), and then passes through the heat exchanger 52. After passing through the first multi-way water valve 21, it is returned to the water-cooled condenser 11 by the water pump. The battery circuit: the water pump sends the water in the battery circuit to the heat exchanger 52, and the hot water on the air conditioner side of the heat exchanger 52 heats the water in the battery 7 circuit, which then passes through the battery 7, is adjusted by the second multi-way water valve 55, and then forms a circuit by the water pump.

[0121] In the sixth working condition, the outside temperature is -30°C to -0°C, and the scheme for simultaneously heating the passenger compartment and the battery uses a heat pump system with a bypass circuit to provide heat for the battery and the passenger compartment. Figure 5 As shown in the figure, the refrigerant circuit: high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, passes through the first expansion valve 62, returns to the gas-liquid separator 13, and the other passes into the water-cooled condenser 11. The water-cooled condenser 11 releases heat from the refrigerant, and then passes through the fourth expansion valve 32. After being adjusted by the fourth expansion valve 32, it passes through the first control valve 66, and finally enters the compressor after being separated by the gas-liquid separator 13. The hot water on the water side of the water-cooled condenser 11 absorbs heat on the refrigerant side, flows through the front air conditioner internal heater 41 and the rear air conditioner internal heater 42 to heat the passenger compartment, and then passes through the heat exchanger 52. After passing through the first multi-way water valve 21, it is returned to the water-cooled condenser 11 by the water pump. The battery circuit: the water pump sends the water in the battery circuit to the heat exchanger 52, and the hot water on the air conditioner side of the heat exchanger 52 heats the water in the battery 7 circuit, which then passes through the battery 7, is adjusted by the second multi-way water valve 55, and then forms a circuit by the water pump.

[0122] In summary, the thermal management system of the present application can meet the heating requirements of the passenger compartment and the battery in different environmental temperatures by coordinating the arrangement of public pipelines and heat exchange equipment between independent thermal management circuits, and can realize the cancellation of PTC, reduce energy consumption, reduce cost, and improve the cruising range.

[0123] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of 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.

[0124] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0125] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A vehicle thermal management system, characterized in that: include: A refrigerant circuit (1) is provided with a heat pump device equipped with a water-cooled condenser (11), a bypass heat auxiliary device, and an outdoor heat exchange device (3) on its pipeline. The bypass heat auxiliary device and the outdoor heat exchange device (3) can be turned on either or both to improve the heating efficiency of the heat pump device; A passenger compartment heating circuit (2) having circulating water transported therein, an air conditioning heater device (4) being provided on the passenger compartment heating circuit (2), and the passenger compartment heating circuit (2) being in communication with the water side of the water-cooled condenser (11); A battery heating circuit (5), part of which is used to pass through the battery (7), wherein circulating water is transported in the battery heating circuit (5), and the battery heating circuit (5) is connected to the passenger compartment heating circuit (2) via a heat exchanger (52), and the battery heating circuit (5) can exchange heat with the passenger compartment heating circuit (2) via the heat exchanger (52) to heat the battery (7); The heat pump device comprises: A compressor (12), the output port of which is connected to the input port of the water-cooled condenser (11) through a pipeline of the refrigerant circuit (1); A gas-liquid separator (13), the output port of which is connected to the input port of the compressor (12) via a refrigerant circuit (1) pipeline, and the input port of the gas-liquid separator (13) is connected to the output port of the water-cooled condenser (11); The bypass thermal auxiliary equipment includes: A second bypass line (63), the input side of which can be communicated with the output port of the water-cooled condenser (11), and the output side of the second bypass line (63) is communicated with the input port of the gas-liquid separator (13); a third bypass line (8), the input side of which can be connected to the output port of the water-cooled condenser (11) through the second bypass line (63), and the output side portion of the third bypass line (8) passes through the battery heating circuit (5) and is connected to the input port of the gas-liquid separator (13); A third expansion valve (81) is provided on the third bypass line (8).

2. The vehicle thermal management system according to claim 1, wherein: The bypass thermal auxiliary equipment also includes: A first bypass pipeline (61), the input side of which is in communication with the output port of the compressor (12), a first control valve (66) being provided on the output side of the first bypass pipeline (61), the first control valve (66) being in communication with the input port of the gas-liquid separator (13); A first expansion valve (62) is provided on the first bypass line (61).

3. The vehicle thermal management system according to claim 2, wherein: The bypass thermal auxiliary equipment also includes: An air-conditioning evaporator (64) is provided on the second bypass line (63), and the air-conditioning evaporator (64) corresponds to the position of the air-conditioning heater device (4); A second expansion valve (65) is provided on the second bypass line (63), and the second expansion valve (65) is in communication with the input side of the air-conditioning evaporator (64).

4. The vehicle thermal management system according to claim 1, wherein: The battery heating circuit (5) comprises: A battery heating pipeline (51) is provided with a first water pump (54), and the battery heating pipeline (51) is provided in the battery (7). The heat exchanger (52) is provided on the battery heating pipeline (51), and two pipelines are provided in the heat exchanger (52), one of which is in communication with the battery heating pipeline (51) and the other is in communication with the passenger compartment heating circuit (2); A battery cooler (53) is provided on the battery heating pipeline (51), and the second bypass pipeline (63) is passed through the battery cooler (53).

5. The vehicle thermal management system according to claim 1, wherein: The outdoor heat exchange device (3) comprises: an outdoor heat exchanger (31), which is arranged on the pipeline of the refrigerant circuit (1), and the output port of the outdoor heat exchanger (31) can be connected to or blocked from the input port of the gas-liquid separator (13).

6. The vehicle thermal management system according to claim 5, wherein: The outdoor heat exchange device (3) further includes: a fourth expansion valve (32) which is arranged on the input port of the outdoor heat exchanger (31).

7. The vehicle thermal management system according to claim 1, wherein: The front air-conditioning inner heater (41) and the rear air-conditioning inner heater (42) of the air-conditioning heater device (4) are arranged in series on the passenger compartment heating circuit (2) pipeline.

8. A vehicle thermal management control method using the vehicle thermal management system according to claim 1, characterized in that: include: Collecting the outside temperature value, and controlling the vehicle thermal management system to perform heating action according to the outside temperature value and vehicle instructions; wherein, When the outside temperature is above -10°C and the vehicle issues a passenger compartment heating instruction, the outdoor heat exchange device (3) and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit (1) pipeline, while keeping the circulating water in the passenger compartment heating circuit (2) pipeline circulating to heat the air conditioning heater device (4); When the outside temperature is between -30°C and -10°C and the vehicle issues a passenger compartment heating command, the bypass heat auxiliary device and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit (1) pipeline, while keeping the circulating water in the passenger compartment heating circuit (2) pipeline circulating to heat the air conditioning heater device (4); When the outside temperature is between -30°C and 0°C and the vehicle issues a heating instruction to the passenger compartment and the battery 7, the bypass heat auxiliary device and the heat pump device are turned on to heat the refrigerant in the refrigerant circuit (1) pipeline, while keeping the circulating water in the passenger compartment heating circuit (2) pipeline and the battery heating circuit (5) circulating to increase the temperature of the air conditioning heater device (4) and the battery (7).

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