Vehicle thermal management system and vehicle

Abstract

A vehicle thermal management system and a vehicle. The vehicle thermal management system comprises a refrigerant loop (1) and a cooling liquid loop (2); the refrigerant loop (1) is provided with a compressor (11), a condensation device (122), a heat exchange device (132) and an evaporation device (152); the cooling liquid loop (2) is provided with a multi-way valve (21), a heater core (221), a battery heat exchange member (231), a motor heat exchange member (241), a cooling device (251) and a heat dissipation device (261). The multi-way valve (21) comprises a valve body and a valve core, the valve body being provided with a plurality of communication ports, and the valve core being capable of rotating with respect to the valve body, such that the vehicle thermal management system has a plurality of working modes. The cooling liquid loop (2) integrates a passenger compartment loop (22), a battery loop (23), a motor loop (24), a cooling loop (25) and a heat dissipation loop (26) by means of the multi-way valve (21), and exchanges heat with the refrigerant loop (1) by means of the passenger compartment loop (22) and the cooling loop (25).

Description

Vehicle thermal management system and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411073958.3, filed on August 6, 2024, and entitled "Vehicle thermal management system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of automobile thermal management, in particular to a vehicle thermal management system and vehicle. BACKGROUND

[0003] The thermal management system is one of the important components of a new energy vehicle, mainly used for adjusting the energy circulation of the motor, battery and passenger cabin, so that the motor, battery and passenger cabin all have appropriate working temperatures, to improve the working performance and comfort of the vehicle. The thermal management systems in the prior art mostly adopt a distributed structure, and each component is connected through a pipeline. The separate arrangement of each component makes the thermal management system occupy a larger space inside the vehicle body, and the wiring of the overall pipeline is very complex. The number of valves and pipelines connected inside is large, resulting in a high production cost of the thermal management system. SUMMARY

[0004] Therefore, the present application provides a vehicle thermal management system and vehicle to solve the technical problem of high production cost caused by the large size and large number of valves and pipelines connected inside in the prior art thermal management system.

[0005] The present application provides a vehicle thermal management system, which comprises a refrigerant circuit and a coolant circuit. The refrigerant circuit is provided with a compressor, a condensing device, a heat exchange device and an evaporating device. The coolant circuit is provided with a multi-way valve, a heater core, a battery heat exchange element, a motor heat exchange element, a cooling device and a heat dissipation device. The multi-way valve comprises a valve body and a valve core. The valve body is provided with a plurality of communication ports. The coolant circuit further comprises a passenger cabin circuit, a battery circuit, a motor circuit, a cooling circuit and a heat dissipation circuit.

[0006] The heater core and the first and second communication ports of the valve body are connected through the passenger cabin circuit. The battery heat exchange element and the third and fourth communication ports of the valve body are connected through the battery circuit. The motor heat exchange element and the fifth and sixth communication ports of the valve body are connected through the motor circuit. The cooling device and the seventh and eighth communication ports of the valve body are connected through the cooling circuit. The heat dissipation device and the ninth communication port of the valve body and the motor circuit are connected through the heat dissipation circuit.

[0007] The condensing device and the heat exchanging device are connected to the liquid outlet of the compressor, and the condensing device and the heat exchanging device are arranged in parallel, the refrigerant circuit exchanges heat with the passenger cabin circuit through the condensing device, and the refrigerant circuit exchanges heat with the external environment through the heat exchanging device.

[0008] In the embodiment, the cooling liquid circuit integrates the passenger cabin circuit, the battery circuit, the motor circuit, the cooling circuit and the heat dissipation circuit through the multi-way valve, and exchanges heat with the refrigerant circuit through the passenger cabin circuit and the cooling circuit, so that the number of pipes and valves in the vehicle thermal management system is reduced, the integration degree of the vehicle thermal management system is improved, the production cost is reduced, and the flow path of the cooling liquid in the working process is shortened, and the heat exchange efficiency is improved.

[0009] In a possible implementation, the cooling device also communicates with the refrigerant circuit, and in the refrigerant circuit, the liquid inlet of the cooling device communicates with the liquid outlet of the condensing device or the liquid outlet of the heat exchanging device, and the liquid outlet of the cooling device communicates with the liquid inlet of the compressor.

[0010] In a possible implementation, the condensing device also communicates with the passenger cabin circuit, and in the passenger cabin circuit, the liquid inlet of the condensing device communicates with the first communication port, and the liquid outlet of the condensing device communicates with the liquid inlet of the heater core, and in the refrigerant circuit, the liquid inlet of the condensing device communicates with the liquid outlet of the compressor, and the liquid outlet of the condensing device communicates with the cooling device and / or the evaporating device.

[0011] In a possible implementation, in the refrigerant circuit, the liquid inlet of the heat exchanging device communicates with the liquid outlet of the compressor, and the liquid outlet of the heat exchanging device communicates with the cooling device and / or the evaporating device.

[0012] In a possible implementation, in the refrigerant circuit, the liquid inlet of the evaporating device communicates with the liquid outlet of the condensing device or the liquid outlet of the heat exchanging device, and the liquid outlet of the evaporating device communicates with the liquid inlet of the compressor, so that the evaporating device is arranged in parallel with the cooling device.

[0013] In a possible implementation, the cooling liquid circuit further comprises a three-way valve for communicating the passenger cabin circuit and the battery circuit, a first interface of the three-way valve communicates with the liquid outlet of the heater core, a second interface of the three-way valve communicates with the second communication port, and a third interface of the three-way valve communicates with the liquid inlet of the battery heat exchanging member.

[0014] In a possible implementation, the cooling liquid circuit is further provided with a one-way valve, a liquid inlet of the one-way valve being in communication with a liquid outlet of the battery circuit, and a liquid outlet of the one-way valve being in communication with a liquid inlet of the passenger cabin circuit.

[0015] In a possible implementation, the valve core is capable of rotating relative to the valve body, and the vehicle thermal management system further comprises a control device and a plurality of detection devices, the control device being in signal connection with the valve core, and the plurality of detection devices being respectively connected in series in the circuits for detecting temperatures in the circuits, and the control device being configured to control the valve core to start rotating or stop rotating relative to the valve body according to detection results of the detection devices.

[0016] In a possible implementation, the vehicle thermal management system comprises a first working mode and a second working mode.

[0017] When the passenger cabin circuit is in a first temperature range, the vehicle thermal management system switches to the first working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, the sixth communication port is in communication with the seventh communication port, the heater core is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in an open state.

[0018] When the passenger cabin circuit is in a second temperature range, the vehicle thermal management system switches to the second working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, the sixth communication port is in communication with the seventh communication port, the heater core is in an open state, the condensing device is in a closed state, the heat exchange device is in an open state, the cooling device is in an open state, and the evaporating device is in an open state.

[0019] In a possible implementation, in the first working mode and / or the second working mode, the ninth communication port and the fifth communication port are both in communication with the eighth communication port, and the heat dissipation device is in an open state.

[0020] In a possible implementation, the vehicle thermal management system further comprises a third working mode, when the battery circuit and the motor circuit are both in a third temperature range, the vehicle thermal management system switches to the third working mode, in the third working mode, the first communication port communicates with the second communication port, the third communication port communicates with the eighth communication port, the fourth communication port communicates with the fifth communication port, and the sixth communication port communicates with the seventh communication port; the heater core is in an open state, the condenser is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporator is in a closed state.

[0021] In a possible implementation, the vehicle thermal management system further comprises a fourth working mode, when the battery circuit is in a fourth temperature range and the motor circuit is in a fifth temperature range, the vehicle thermal management system switches to the fourth working mode, in the fourth working mode, the first communication port communicates with the second communication port, the third communication port communicates with the eighth communication port, the fourth communication port communicates with the seventh communication port, and the fifth communication port communicates with the sixth communication port; the heater core is in an open state, the condenser is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporator is in a closed state.

[0022] In a possible implementation, the cooling liquid circuit is further provided with a three-way valve, a first interface of the three-way valve communicates with a liquid outlet of the heater core, a second interface of the three-way valve communicates with the second communication port, and a third interface of the three-way valve communicates with a liquid inlet of the battery heat exchange element.

[0023] The vehicle thermal management system further comprises a fifth working mode, when the battery circuit is in a fifth temperature range and the motor circuit is in a third temperature range, the vehicle thermal management system switches to the fifth working mode, in the fifth working mode, the first communication port communicates with the fourth communication port, the fifth communication port communicates with the eighth communication port, the sixth communication port communicates with the seventh communication port, and the first interface communicates with the third interface; the heater core is in an open state, the condenser is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporator is in a closed state.

[0024] In a possible implementation, the cooling liquid circuit is further provided with a one-way valve, a liquid inlet of the one-way valve communicates with a liquid outlet of the battery circuit, and a liquid outlet of the one-way valve communicates with a liquid inlet of the passenger compartment circuit.

[0025] The vehicle thermal management system further comprises a sixth working mode, when the battery circuit is in a sixth temperature range and the motor circuit is in a third temperature range, the vehicle thermal management system switches to the sixth working mode, in the sixth working mode, the first communication port communicates with the second communication port, the third communication port communicates with the fourth communication port, the fifth communication port communicates with the eighth communication port, the sixth communication port communicates with the seventh communication port, the first interface, the second interface and the third interface communicate with each other; the heater core is in an open state, the one-way valve is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in a closed state.

[0026] In a possible implementation, the vehicle thermal management system further comprises a seventh working mode, when the battery circuit is in a third temperature range and the motor circuit is in a sixth temperature range, the vehicle thermal management system switches to the seventh working mode, in the seventh working mode, the third communication port communicates with the eighth communication port, the fourth communication port communicates with the seventh communication port, and the ninth communication port communicates with the sixth communication port; the heater core is in a closed state, the heat dissipation device is in an open state, the condensing device is in a closed state, the heat exchange device is in an open state, the cooling device is in an open state, and the evaporating device is in an open state.

[0027] Embodiments of the present application also provide a vehicle, which comprises a vehicle body and a vehicle thermal management system mounted on the vehicle body, and the vehicle thermal management system is any one of the above-mentioned vehicle thermal management systems.

[0028] In the embodiments of the present application, when the vehicle is provided with the above-mentioned vehicle thermal management system, the vehicle comprises at least twelve working states to meet different requirements.

[0029] In the spring and autumn environment, the vehicle thermal management system can switch to the first working mode or the second working mode to meet the dehumidification requirements in different states; in the winter environment, the vehicle thermal management system can switch to the third working mode, the fourth working mode, the fifth working mode, the sixth working mode and the tenth working mode to meet the heating requirements in different states; in the summer environment, the vehicle thermal management system can switch to the seventh working mode, the eighth working mode and the ninth working mode to meet the refrigeration requirements in different states, so as to ensure the comfort of the passenger compartment and improve the stability and reliability of the battery heat exchange element and the motor heat exchange element in the working process.

[0030] Meanwhile, the vehicle can be switched to the eleventh working mode before starting, so as to prepare for starting and switching to other working modes, and the twelfth working mode can be switched to when the vehicle is under maintenance, so that the coolant can flow through each circuit, and the flow in the coolant circuit is sufficient.

[0031] Therefore, the vehicle in the embodiment can have different working states in different environments, the influence of environmental factors on the passenger compartment, the battery heat exchange element, the motor heat exchange element and other components is reduced, the comfort of the passenger compartment is improved, the service life of each component is prolonged, and the overall working performance of the vehicle is optimized.

[0032] It should be understood that the foregoing general description and the following detailed description are only exemplary and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Fig. 1 is a schematic diagram of each circuit in the vehicle thermal management system provided by the present application;

[0035] Fig. 2 is a schematic diagram of each component in the vehicle thermal management system provided by the present application;

[0036] Fig. 3 is an enlarged view of the multi-way valve provided by the present application;

[0037] Fig. 4 is a schematic diagram of the vehicle thermal management system provided by the present application in the first working mode or the second working mode;

[0038] Fig. 5 is a schematic diagram of the vehicle thermal management system provided by the present application in the third working mode;

[0039] Fig. 6 is a schematic diagram of the vehicle thermal management system provided by the present application in the fourth working mode;

[0040] Fig. 7 is a schematic diagram of the vehicle thermal management system provided by the present application in the fifth working mode;

[0041] Fig. 8 is a schematic diagram of the vehicle thermal management system provided by the present application in the sixth working mode;

[0042] Fig. 9 is a schematic diagram of the vehicle thermal management system provided by the present application in the seventh working mode;

[0043] Fig. 10 is a schematic diagram of the vehicle thermal management system provided by the present application in the eighth working mode;

[0044] Fig. 11 is a schematic diagram of the vehicle thermal management system provided by the present application in a ninth working mode;

[0045] Fig. 12 is a schematic diagram of the vehicle thermal management system provided by the present application in a tenth working mode;

[0046] Fig. 13 is a schematic diagram of the vehicle thermal management system provided by the present application in an eleventh working mode;

[0047] Fig. 14 is a schematic diagram of the vehicle thermal management system provided by the present application in a twelfth working mode.

[0048] BRIEF DESCRIPTION OF DRAWINGS 1 - refrigerant circuit; 11 - compressor; 12 - first branch; 121 - first stop valve; 122 - condensing device; 13 - second branch; 131 - second stop valve; 132 - heat exchanging device; 14 - third branch; 141 - first expansion valve; 15 - fourth branch; 151 - second expansion valve; 152 - evaporating device; 16 - liquid accumulator; 2 - coolant circuit; 21 - multi-way valve; 211 - first communication port; 212 - second communication port; 213 - third communication port; 214 - fourth communication port; 215 - fifth communication port; 216 - sixth communication port; 217 - seventh communication port; 218 - eighth communication port; 219 - ninth communication port; 22 - passenger cabin circuit; 221 - heater core; 222 - heating device; 223 - heater core water pump; 23 - battery circuit; 231 - battery heat exchanging member; 232 - battery water pump; 24 - motor circuit; 241 - motor heat exchanging member; 242 - power module; 243 - motor water pump; 25 - cooling circuit; 251 - cooling device; 26 - heat dissipation circuit; 261 - heat dissipation device; 27 - three-way valve.

[0049] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the present application. DETAILED DESCRIPTION

[0050] For a better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0051] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0052] The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the description of the embodiments of the present application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0053] It should be understood that the term "and / or" used herein only describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0054] Embodiments of the present application provide a vehicle thermal management system, as shown in FIG. 1, FIG. 2 and FIG. 3, which comprises a refrigerant circuit 1 and a coolant circuit 2.

[0055] The refrigerant circuit 1 is provided with a compressor 11, a condensing device 122, a heat exchange device 132 and an evaporating device 152, and further comprises a main path (not marked in the figure), a first branch path 12, a second branch path 13, a third branch path 14 and a fourth branch path 15.

[0056] Among them, the compressor 11 is arranged in the main path, the condensing device 122 is arranged in the first branch path 12, the heat exchange device 132 is arranged in the second branch path 13, and the evaporating device 152 is arranged in the fourth branch path 15.

[0057] The coolant circuit 2 is provided with a multi-way valve 21, a heater core 221, a battery heat exchange element 231, a motor heat exchange element 241, a cooling device 251 and a heat dissipation device 261, and the multi-way valve 21 comprises a valve body and a valve core, the valve body is provided with a plurality of communication ports, and the coolant circuit 2 further comprises a passenger compartment circuit 22, a battery circuit 23, a motor circuit 24, a cooling circuit 25 and a heat dissipation circuit 26.

[0058] Among them, the heater core 221 and the first communication port 211 and the second communication port 212 of the valve body are communicated through the passenger compartment circuit 22, the battery heat exchange element 231 and the third communication port 213 and the fourth communication port 214 of the valve body are communicated through the battery circuit 23, the motor heat exchange element 241 and the fifth communication port 215 and the sixth communication port 216 of the valve body are communicated through the motor circuit 24, the cooling device 251 and the seventh communication port 217 and the eighth communication port 218 of the valve body are communicated through the cooling circuit 25, and the heat dissipation device 261 and the ninth communication port 219 of the valve body are communicated through the motor circuit 24.

[0059] In the embodiment, the condensing device 122 in the refrigerant circuit 1 is also connected in series with the passenger cabin circuit 22 in the cooling liquid circuit 2, the cooling device 251 in the cooling liquid circuit 2 is also connected in series with the third branch 14 in the refrigerant circuit 1, and the condensing device 122 and the heat exchange device 132 are both connected to the outlet of the compressor 11, so that the refrigerant flowing out of the compressor 11 can flow to the condensing device 122 and exchange heat with the passenger cabin circuit 22 through the condensing device 122, or the refrigerant flowing out of the compressor 11 can flow to the heat exchange device 132 and exchange heat with the external environment through the heat exchange device 132, and meanwhile, the refrigerant circuit 1 can also exchange heat with the cooling circuit 25 through the cooling device 251.

[0060] In the refrigerant circuit 1, the first branch 12 and the second branch 13 are both connected to the outlet of the compressor 11, so that they are arranged in parallel, and the third branch 14 and the fourth branch 15 are both connected to the inlet of the compressor 11, so that they are arranged in parallel.

[0061] After the high-temperature and high-pressure gaseous refrigerant flows from the compressor 11 to the first branch 12, the first branch 12 can exchange heat with the passenger cabin circuit 22 through the condensing device 122, so that the condensing device 122 flows out high-temperature cooling liquid on one side of the passenger cabin circuit 22 and flows out high-pressure and low-temperature liquid refrigerant on one side of the first branch 12; after the high-temperature and high-pressure gaseous refrigerant flows from the compressor 11 to the second branch 13, the second branch 13 can exchange heat with the external environment through the heat exchange device 132, so that the heat exchange device 132 flows out high-pressure and low-temperature liquid refrigerant.

[0062] The first branch 12 is further provided with a first stop valve 121, which is located upstream of the condensing device 122, and the second branch 13 is further provided with a second stop valve 131, which is located upstream of the heat exchange device 132, so that the control of the refrigerant flow can be realized by controlling the opening or closing of the first stop valve 121 and the second stop valve 131.

[0063] The refrigerant circuit 1 further comprises a liquid storage tank 16, the first branch 12 and the second branch 13 are both in communication with the inlet of the liquid storage tank 16, and the third branch 14 and the fourth branch 15 are both in communication with the outlet of the liquid storage tank 16, so that the high-pressure and low-temperature liquid refrigerant can be converged in the liquid storage tank 16 for unified distribution.

[0064] The high-pressure low-temperature liquid refrigerant flows from the liquid storage tank 16 to the third branch 14, and the third branch 14 can exchange heat with the cooling circuit 25 through the cooling device 251, so that the cooling device 251 flows out low-temperature cooling liquid on one side of the cooling circuit 25 and flows out low-pressure medium-temperature gaseous refrigerant on one side of the third branch 14; the high-pressure low-temperature liquid refrigerant flows from the liquid storage tank 16 to the fourth branch 15, and the fourth branch 15 can convert the high-pressure low-temperature liquid refrigerant into low-pressure medium-temperature gaseous refrigerant through the evaporation device 152, so that the surface temperature of the evaporation device 152 is reduced, thereby facilitating refrigeration of the passenger compartment.

[0065] Among them, the third branch 14 is further provided with a first expansion valve 141, and the first expansion valve 141 is located upstream of the cooling device 251; the fourth branch 15 is further provided with a second expansion valve 151, and the second expansion valve 151 is located upstream of the evaporation device 152, so that the flow rate and flow of the refrigerant can be controlled by controlling the opening degree of the first expansion valve 141 and the second expansion valve 151.

[0066] In the cooling liquid circuit 2, the valve body of the multi-way valve 21 at least includes a first communication port 211, a second communication port 212, a third communication port 213, a fourth communication port 214, a fifth communication port 215, a sixth communication port 216, a seventh communication port 217, an eighth communication port 218 and a ninth communication port 219.

[0067] Among them, the first communication port 211 can be the liquid inlet of the passenger compartment circuit 22, and the second communication port 212 can be the liquid outlet of the passenger compartment circuit 22; the third communication port 213 can be the liquid inlet of the battery circuit 23, and the fourth communication port 214 can be the liquid outlet of the battery circuit 23; the fifth communication port 215 can be the liquid inlet of the motor circuit 24, and the sixth communication port 216 can be the liquid outlet of the motor circuit 24; the seventh communication port 217 can be the liquid inlet of the cooling circuit 25, the eighth communication port 218 can be the liquid outlet of the cooling circuit 25, and the ninth communication port 219 can also be the liquid inlet of the motor circuit 24 and be in proportional communication with the fifth communication port 215.

[0068] The passenger compartment circuit 22, the battery circuit 23, the motor circuit 24, the cooling circuit 25 and the heat dissipation circuit 26 in the cooling liquid circuit 2 are all connected with the multi-way valve 21, when the valve core rotates relative to the valve body, the valve core can communicate or block at least part of the communication ports, so that the different communication states between the circuits are obtained, so that the vehicle thermal management system has different working modes, which is beneficial to recycle and distribute the energy between different circuits, so as to improve the energy utilization rate and reduce the energy consumption.

[0069] Therefore, the cooling liquid circuit 2 in the embodiment integrates the passenger cabin circuit 22, the battery circuit 23, the motor circuit 24, the cooling circuit 25 and the heat dissipation circuit 26 through the multi-way valve 21, and realizes heat exchange with the refrigerant circuit 1 through the passenger cabin circuit 22 and the cooling circuit 25, thereby reducing the number of pipes and valves used in the vehicle thermal management system, facilitating improvement of the integration level of the vehicle thermal management system, reducing production cost, and at the same time, facilitating shortening of the flow path of the cooling liquid in the working process and improving heat exchange efficiency.

[0070] In a specific embodiment, as shown in FIGS. 1, 2 and 3, in the refrigerant circuit 1, the inlet of the cooling device 251 is in communication with the outlet of the condensing device 122 or the outlet of the heat exchange device 132, and the outlet of the cooling device 251 is in communication with the inlet of the compressor 11; in the cooling liquid circuit 2, the inlet of the cooling device 251 is in communication with the seventh communication port 217, and the outlet of the cooling device 251 is in communication with the eighth communication port 218.

[0071] In the embodiment, the cooling device 251 is connected in series to the third branch 14 of the refrigerant circuit 1 and the cooling circuit 25 of the cooling liquid circuit 2, so that low-temperature refrigerant flows into one side of the cooling device 251 and high-temperature cooling liquid flows into the other side of the cooling device 251, and heat exchange is performed between the two in the cooling device 251, so that heat exchange between the refrigerant circuit 1 and the cooling liquid circuit 2 can be realized through the cooling device 251, which is conducive to improving energy utilization efficiency and reducing energy waste. When the battery circuit 23 and / or the motor circuit 24 are in communication with the cooling circuit 25, it is also conducive to improving the cooling effect of the battery heat exchange element 231 and / or the motor heat exchange element 241, and ensuring the working state of the battery and / or the motor.

[0072] In a specific embodiment, as shown in FIGS. 1, 2 and 3, in the refrigerant circuit 1, the inlet of the condensing device 122 is in communication with the outlet of the compressor 11, and the outlet of the condensing device 122 is in communication with the cooling device 251 and / or the evaporating device 152; in the passenger cabin circuit 22, the inlet of the condensing device 122 is in communication with the first communication port 211, and the outlet of the condensing device 122 is in communication with the inlet of the heater core 221.

[0073] In the embodiment, the condensing device 122 is connected in series to the first branch 12 of the refrigerant circuit 1 and the passenger cabin circuit 22 of the cooling liquid circuit 2, so that high-temperature refrigerant flows into one side of the condensing device 122 and low-temperature cooling liquid flows into the other side of the condensing device 122, and heat exchange is performed between the two in the condensing device 122, so that heat exchange between the refrigerant circuit 1 and the cooling liquid circuit 2 can be realized through the condensing device 122, which is conducive to improving energy utilization efficiency and improving the heating effect of the heater core 221 at the same time, so as to ensure the comfort of the passenger cabin in winter environment.

[0074] In a specific embodiment, as shown in FIG. 1, FIG. 2 and FIG. 3, in the refrigerant circuit 1, the liquid inlet of the heat exchange device 132 is communicated with the liquid outlet of the compressor 11, and the liquid outlet of the heat exchange device 132 is communicated with the cooling device 251 and / or the evaporation device 152.

[0075] In the embodiment, the heat exchange device 132 is connected in series in the second branch 13 of the refrigerant circuit 1. During the flow of the refrigerant, the liquid inlet of the heat exchange device 132 flows into high-temperature refrigerant, and the liquid outlet of the heat exchange device 132 flows out low-temperature refrigerant. When the high-temperature refrigerant flows in the heat exchange device 132, heat is transferred to the surface of the heat exchange device 132, so that the surface temperature of the heat exchange device 132 is increased. Then, the heat of the heat exchange device 132 is transported to the external environment by the electronic fan (not shown in the figure), so that the surface temperature of the heat exchange device 132 is reduced, thereby reducing the temperature of the refrigerant in the heat exchange device 132. Thus, heat exchange between the refrigerant circuit 1 and the external environment can be achieved through the heat exchange device 132, which is conducive to discharging heat from the vehicle interior to the external environment, so as to ensure the comfort of the passenger compartment in summer environment.

[0076] In a specific embodiment, as shown in FIG. 1, FIG. 2 and FIG. 3, in the refrigerant circuit 1, the liquid inlet of the evaporation device 152 is communicated with the liquid outlet of the condensation device 122 or the liquid outlet of the heat exchange device 132, and the liquid outlet of the evaporation device 152 is communicated with the liquid inlet of the compressor 11, so that the evaporation device 152 is connected in parallel with the cooling device 251.

[0077] In the embodiment, the evaporation device 152 is connected in series in the fourth branch 15 of the refrigerant circuit 1. During the flow of the refrigerant, the liquid inlet of the evaporation device 152 flows into low-temperature refrigerant, and the liquid outlet of the evaporation device 152 flows out medium-temperature refrigerant. When the low-temperature refrigerant flows in the evaporation device 152, the heat on the surface of the evaporation device 152 is absorbed, so that the surface temperature of the evaporation device 152 is reduced. Then, the cold air can be generated by the air blower (not shown in the figure) and transported into the passenger compartment, so that the temperature in the passenger compartment is reduced, thereby ensuring the comfort of the passenger compartment in summer environment. At the same time, it is also convenient for the subsequent compressor 11 to process it, which is conducive to improving the energy utilization efficiency.

[0078] In a specific embodiment, as shown in FIG. 1, FIG. 2 and FIG. 3, the cooling liquid circuit 2 is further provided with a three-way valve 27 for communicating the passenger compartment circuit 22 and the battery circuit 23. The first interface (not shown in the figure) of the three-way valve 27 is communicated with the liquid outlet of the heater core 221, the second interface (not shown in the figure) of the three-way valve 27 is communicated with the second communication port 212, and the third interface (not shown in the figure) of the three-way valve 27 is communicated with the liquid inlet of the battery heat exchange member 231.

[0079] In the embodiments of the present application, when the first port, the second port and the third port of the three-way valve 27 are in communication with each other, the multi-way valve 21, the passenger cabin circuit 22 and the battery circuit 23 are in communication with each other; when the first port, the second port and the third port of the three-way valve 27 are partially in communication, the multi-way valve 21, the passenger cabin circuit 22 and the battery circuit 23 are partially in communication or relatively independent.

[0080] For example, when the first port is only in communication with the second port, the passenger cabin circuit 22 and the battery circuit 23 are relatively independent; when the first port is only in communication with the third port, the passenger cabin circuit 22 and the battery circuit 23 are in communication with each other; when the second port and the third port are in proportional communication with the first port, the multi-way valve 21, the passenger cabin circuit 22 and the battery circuit 23 are in communication with each other.

[0081] Therefore, by controlling the working state of the three-way valve 27, the connection state between the multi-way valve 21, the passenger cabin circuit 22 and the battery circuit 23 is changed, so that the vehicle thermal management system can be switched to different communication states according to different needs, which is beneficial to further improve the integration degree of the vehicle thermal management system.

[0082] In a specific embodiment, as shown in FIGS. 1, 2 and 3, the cooling liquid circuit 2 is further provided with a one-way valve (not labeled in the figure), the inlet of the one-way valve is in communication with the outlet of the battery circuit 23, and the outlet of the one-way valve is in communication with the inlet of the passenger cabin circuit 22.

[0083] In the embodiments of the present application, the outlet of the battery circuit 23 is not only in communication with the second communication port 212, but also in communication with the inlet of the passenger cabin circuit 22 through the one-way valve, so that the cooling liquid flowing out of the battery circuit 23 can be collected into the passenger cabin circuit 22 to absorb heat, and then flow back to the battery circuit 23 through the three-way valve 27 to heat the battery heat exchange element 231, which is beneficial to improve the heating effect of the battery heat exchange element 231, so as to ensure the working state of the battery in winter environment, and at the same time, it can reduce the possibility of cooling liquid flowing from the inlet of the passenger cabin circuit 22 to the outlet of the battery circuit 23, thereby reducing the possibility of reverse flow of the cooling liquid and improving the smoothness of the cooling liquid in the flowing process.

[0084] In a specific embodiment, the valve core can rotate relative to the valve body, and the vehicle thermal management system further comprises a control device (not shown in the figure) and a plurality of detection devices (not labeled in the figure), the control device is signal connected with the valve core, and the plurality of detection devices are respectively connected in series in each circuit for detecting the temperature in each circuit, and the control device is used to control the valve core to start rotating or stop rotating relative to the valve body according to the detection results of the detection devices.

[0085] In the embodiments of the present application, the plurality of detection devices are connected in series in each loop, for detecting the temperature of the refrigerant or the temperature of the cooling liquid in each loop, and transmitting the detection results to the control device in real time, so that the control device controls the valve core to start rotating or stop rotating according to the detection results of the detection devices, thereby realizing the conversion of the vehicle thermal management system between different working modes.

[0086] Therefore, by the control device and the detection devices in each loop, the automation degree of the vehicle thermal management system can be improved, so that the vehicle thermal management system can automatically switch between different working modes in different use environments, so that the battery heat exchange element 231 and the motor heat exchange element 241 can quickly adapt to the new working environment, thereby ensuring that they can stably work in different environments, which is conducive to reducing the damage of environmental factors to the battery heat exchange element 231 and the motor heat exchange element 241, thereby prolonging the service life and more meeting the actual use requirements.

[0087] In a specific embodiment, along the flow direction of the refrigerant or the cooling liquid, each branch and each loop includes at least one detection device connected in series at the water outlet of each loop, for detecting the temperature of the liquid flowing out of the branch or the loop, and transmitting the temperature signal to the control device, so that the control device judges the temperature signal.

[0088] In a specific embodiment, as shown in FIG. 4, the vehicle thermal management system includes a first working mode and a second working mode.

[0089] In the first working mode and the second working mode, the first communication port 211 communicates with the second communication port 212, the third communication port 213 communicates with the fourth communication port 214, the fifth communication port 215 communicates with the eighth communication port 218, the sixth communication port 216 communicates with the seventh communication port 217, and when the vehicle thermal management system is in the first working mode or the second working mode, it can be applied to the dehumidification working condition in spring and autumn.

[0090] That is, in the first working mode and the second working mode, the liquid inlet of the passenger compartment loop 22 communicates with the liquid outlet thereof, the liquid inlet of the battery loop 23 communicates with the liquid outlet thereof, the liquid inlet of the motor loop 24 communicates with the liquid outlet of the cooling loop 25, and the liquid outlet of the motor loop 24 communicates with the liquid inlet of the cooling loop 25, so that the passenger compartment loop 22 is self-circulated, the battery loop 23 is self-circulated, and the motor loop 24 and the cooling loop 25 are connected in series through the multi-way valve 21.

[0091] Specifically, the detection device in the passenger compartment loop 22 can detect the temperature in the passenger compartment in real time, and set the temperature in the passenger compartment as a preset temperature.

[0092] When the passenger cabin circuit 22 is in a first temperature range, the control device controls the vehicle thermal management system to switch to a first working mode, so that it is in a heating and dehumidifying working state, wherein the first temperature range is a temperature range greater than a preset temperature.

[0093] In the first working mode, the first stop valve 121 in the refrigerant circuit 1 is opened, and the second stop valve 131 is closed, so that the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and after heat exchange with the cooling liquid of the passenger cabin circuit 22 in the condensing device 122, it flows to the liquid storage tank 16, and then flows to the third branch 14 and the fourth branch 15 respectively.

[0094] In the first working mode, the first stop valve 121 in the refrigerant circuit 1 is opened, and the second stop valve 131 is closed, so that the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and after heat exchange with the cooling liquid of the passenger cabin circuit 22 in the condensing device 122, it flows to the liquid storage tank 16, and then flows to the third branch 14 and the fourth branch 15 respectively.

[0095] In the first working mode, the first stop valve 121 in the refrigerant circuit 1 is opened, and the second stop valve 131 is closed, so that the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and after heat exchange with the cooling liquid of the passenger cabin circuit 22 in the condensing device 122, it flows to the liquid storage tank 16, and then flows to the third branch 14 and the fourth branch 15 respectively.

[0096] When the passenger cabin circuit 22 is in a second temperature range, the control device controls the vehicle thermal management system to switch to a second working mode, so that it is in a constant-temperature dehumidifying working state, wherein the second temperature range is a temperature range less than or equal to a preset temperature.

[0097] In the second working mode, the first stop valve 121 in the refrigerant circuit 1 is closed, and the second stop valve 131 is opened, so that the high-temperature refrigerant flowing out of the compressor 11 flows into the second branch 13 through the second stop valve 131, and after heat exchange with the external environment in the heat exchange device 132, it flows to the liquid storage tank 16, and then flows to the third branch 14 and the fourth branch 15 respectively.

[0098] In the first working mode, the first stop valve 121 in the refrigerant circuit 1 is opened, and the second stop valve 131 is closed, so that the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and after heat exchange with the cooling liquid of the passenger cabin circuit 22 in the condensing device 122, it flows to the liquid storage tank 16, and then flows to the third branch 14 and the fourth branch 15 respectively.

[0099] In the process of dehumidification, the water vapor in the passenger compartment is first condensed into liquid water by the evaporative device 152 and then flows out of the air conditioning box. The liquid water is heated to room temperature by the warm air core 221 to evaporate, thereby achieving the effect of constant temperature and dehumidification.

[0100] In a possible implementation, the passenger compartment circuit 22 is further provided with a heating device 222 for heating the cooling liquid in the passenger compartment circuit 22. The liquid inlet of the heating device 222 is in communication with the liquid outlet of the condensing device 122, and the liquid outlet of the heating device 222 is in communication with the warm air core 221.

[0101] In the first working mode, the cooling liquid in the passenger compartment circuit 22 is heated by heat exchange with the refrigerant in the first branch 12 through the condensing device 122, so that the cooling liquid in the passenger compartment circuit 22 can absorb heat and warm up, thereby achieving heating of the warm air core 221, and further eliminating the need to turn on the heating device 222, which is conducive to reducing energy consumption.

[0102] In the second working mode, the cooling liquid in the passenger compartment circuit 22 is always kept at room temperature by heat exchange with the external environment through the heat exchange device 132, and the heating device 222 can be turned on according to the user's demand, which is conducive to improving the dehumidification effect in the second working mode.

[0103] In the first working mode and the second working mode, the inlet and outlet of the battery circuit 23 are in communication through the multi-way valve 21, so that the cooling liquid in the battery circuit 23 circulates under the action of the battery water pump 232, for heating the battery heat exchange member 231, so that the temperature of the battery heat exchange member 231 is always within a suitable working temperature range, so as to be suitable for the working conditions in the spring and autumn seasons, thereby ensuring the working stability of the battery heat exchange member 231. The motor circuit 24 and the cooling circuit 25 are connected in series through the multi-way valve 21, so that the cooling liquid in the motor circuit 24 circulates under the action of the motor water pump 243, and the motor heat exchange member 241 and the power module 242 in the motor circuit 24 are cooled by the cooling device 251, so as to ensure the stability and safety of the motor heat exchange member 241 and the power module 242 during working.

[0104] Therefore, the vehicle thermal management system in the embodiment can switch to the first working mode or the second working mode under different dehumidification requirements to achieve different purposes. Specifically, when switching to the first working mode in the spring and autumn seasons, the cooling liquid in the passenger compartment circuit 22 is heated by the condensing device 122, which is conducive to meeting the heating demand of the passenger compartment while achieving the purpose of dehumidification. When switching to the second working mode in the spring and autumn seasons, the cooling liquid in the passenger compartment circuit 22 is heated by the ambient temperature, which is conducive to meeting the constant temperature demand of the passenger compartment while achieving the purpose of dehumidification.

[0105] In a possible implementation, the heating device 222 can be a (Positive Temperature Coefficient, PTC) water heater, which has the characteristics of high efficiency, stability and reliability. The heating power of the PTC water heater can be automatically adjusted, the heating efficiency is high, the heating temperature is stable, the cooling liquid in the passenger compartment circuit 22 can be heated to a suitable temperature in a short time, the dehumidification time is shortened, and the comfort and safety of driving are improved.

[0106] In a specific implementation, as shown in FIGS. 3 and 4, in the first working mode and / or the second working mode, the ninth communication port 219 and the fifth communication port 215 are both in communication with the eighth communication port 218, and the heat dissipation device 261 is in an open state.

[0107] In the embodiment, the inlet of the heat dissipation circuit 26 is the ninth communication port 219, the outlet of the heat dissipation circuit 26 is in communication with the upstream of the motor water pump 243, the outlet of the cooling circuit 25 is in proportional communication with the inlet of the motor circuit 24 and the inlet of the heat dissipation circuit 26, so that part of the cooling liquid flowing out of the cooling circuit 25 flows into the motor circuit 24 to cool the motor heat exchange element 241 and the power module 242, and the other part of the cooling liquid flows into the heat dissipation circuit 26 to be cooled again by the heat dissipation device 261, and then flows into the motor circuit 24 to cool the motor heat exchange element 241 and the power module 242, and the cooling liquid cooled twice by the heat dissipation device 261 has a lower temperature, which is beneficial to improve the cooling effect of the motor heat exchange element 241 and the power module 242, thereby further reducing the possibility of overheating failure of the motor heat exchange element 241 and the power module 242, and improving the stability and reliability in the working process.

[0108] In a possible implementation, the heat dissipation device 261 is a wind-cooled heat dissipation, such as a low-temperature radiator.

[0109] In a specific implementation, the detection device located in the battery circuit 23 and the motor circuit 24 can detect the temperature of the cooling liquid in each circuit respectively, and transmit the detection result to the control device, and the control device judges the temperature of the battery heat exchange element 231 and the motor heat exchange element 241 according to the detection result, so that the temperature of the battery heat exchange element 231 and the motor heat exchange element 241 can be in one or more of the third temperature range, the fourth temperature range, the fifth temperature range and the sixth temperature range.

[0110] The third temperature range, the fourth temperature range, the fifth temperature range and the sixth temperature range satisfy: the third temperature range is less than the fourth temperature range, the fifth temperature range is less than the sixth temperature range, and the sixth temperature range is less than the third temperature range.

[0111] In a specific embodiment, as shown in FIG. 3 and FIG. 5, the vehicle thermal management system further comprises a third working mode, when the battery circuit 23 and the motor circuit 24 are both in the third temperature range, the vehicle thermal management system switches to the third working mode, in the third working mode, the first communication port 211 communicates with the second communication port 212, the third communication port 213 communicates with the eighth communication port 218, the fourth communication port 214 communicates with the fifth communication port 215, and the sixth communication port 216 communicates with the seventh communication port 217.

[0112] The warm air core 221 is in an open state, the condensing device 122 is in an open state, the heat exchange device 132 is in a closed state, the cooling device 251 is in an open state, and the evaporating device 152 is in a closed state. The warm air core 221 is used for heating the passenger compartment, and the cooling device 251 is used for recycling the heat generated by the battery heat exchange element 231 and the motor heat exchange element 241.

[0113] In the embodiment of the present application, when the battery circuit 23 and the motor circuit 24 are both in the third temperature range, the temperature of the battery circuit 23 and the temperature of the motor circuit 24 are both high, so that the third working mode is suitable for winter environment, and when the passenger compartment has heating demand and the waste heat of the battery circuit 23 and the motor circuit 24 is sufficient, the energy consumption of the compressor 11 for heating and pressurizing the refrigerant can be reduced by recycling the waste heat of the battery circuit 23 and the motor circuit 24, and the heating effect of the passenger compartment can be ensured by the heat exchange between the passenger compartment circuit 22 and the first branch 12.

[0114] In the refrigerant circuit 1, the first stop valve 121 is open, the second stop valve 131 is closed, the first expansion valve 141 is open, and the second expansion valve 151 is closed. The high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and exchanges heat in the condensing device 122 to release heat, so that the low-temperature refrigerant flowing out of the condensing device 122 flows into the liquid storage tank 16, and then flows into the third branch 14 through the first expansion valve 141, and exchanges heat in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251 flows back to the compressor 11, thereby realizing the circulation of the refrigerant.

[0115] In the cooling liquid circuit 2, the inlet of the passenger compartment circuit 22 communicates with the outlet thereof, and the cooling liquid in the passenger compartment circuit 22 flows into the condensing device 122 under the action of the warm core water pump 223 to exchange heat, thereby absorbing heat to heat and warm up the warm air core 221, and then generating hot air under the action of the air blower and delivering the hot air to the passenger compartment to realize the heating effect of the passenger compartment.

[0116] Meanwhile, the outlet of the battery circuit 23 is communicated with the inlet of the motor circuit 24, the outlet of the motor circuit 24 is communicated with the inlet of the cooling circuit 25, and the outlet of the cooling circuit 25 is communicated with the inlet of the battery circuit 23, so that the battery circuit 23, the motor circuit 24 and the cooling circuit 25 are connected in series through the multi-way valve 21.

[0117] The battery heat exchange element 231, the motor heat exchange element 241 and the power module 242 continuously generate heat during operation. The cooling liquid flows into the battery circuit 23 from the third communication port 213 to absorb the heat generated by the battery heat exchange element 231, and then flows out from the fourth communication port 214, and then flows into the motor circuit 24 from the fifth communication port 215 to absorb the heat generated by the motor heat exchange element 241 and the power module 242, and then flows out from the sixth communication port 216, and then flows into the cooling circuit 25 from the seventh communication port 217 to release heat through the cooling device 251, and then flows out from the eighth communication port 218, and then flows back into the battery circuit 23 from the third communication port 213, so as to achieve the heat dissipation effect of the battery circuit 23 and the motor circuit 24.

[0118] Therefore, the vehicle thermal management system in the embodiment can switch to the third working mode in winter environment, and transfer the heat of the cooling liquid to the refrigerant through the cooling device 251, so that the refrigerant absorbs part of the heat to increase the temperature before flowing into the compressor 11, thereby shortening the temperature difference of the refrigerant before and after flowing into the compressor 11, reducing the energy consumption and improving the energy utilization rate, and meeting the cooling demand of the battery circuit 23 and the motor circuit 24 to ensure the stability and reliability of the battery heat exchange element 231, the motor heat exchange element 241 and the power module 242 during operation.

[0119] In a specific embodiment, as shown in FIGS. 3 and 6, the vehicle thermal management system further includes a fourth working mode. When the battery circuit 23 is in the fourth temperature range and the motor circuit 24 is in the fifth temperature range, the vehicle thermal management system switches to the fourth working mode. In the fourth working mode, the first communication port 211 is communicated with the second communication port 212, the third communication port 213 is communicated with the eighth communication port 218, the fourth communication port 214 is communicated with the seventh communication port 217, and the fifth communication port 215 is communicated with the sixth communication port 216.

[0120] The heating core 221 is in an open state, the condensing device 122 is in an open state, the heat exchange device 132 is in a closed state, the cooling device 251 is in an open state, and the evaporating device 152 is in a closed state. The heating core 221 is used for heating the passenger compartment, the cooling device 251 is used for cooling the battery heat exchange element 231, and the motor circuit 24 is self-circulating heat storage.

[0121] In the fourth temperature range of the battery circuit 23 and the fifth temperature range of the motor circuit 24, the temperature of the battery circuit 23 is higher, and the temperature of the motor circuit 24 is lower, so that the fourth working mode is suitable for winter environment, and when the passenger compartment has a heating demand and the battery heat exchange element 231 has a refrigeration demand, the first branch 12 exchanges heat with the passenger compartment circuit 22 through the condensing device 122, thereby meeting the heating demand of the passenger compartment, and the battery circuit 23 is cooled by the cooling device 251, thereby meeting the refrigeration demand of the battery heat exchange element 231.

[0122] In the refrigerant circuit 1, the first stop valve 121 is opened, the second stop valve 131 is closed, the first expansion valve 141 is opened, the second expansion valve 151 is closed, the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and exchanges heat in the condensing device 122 to release heat, so that the low-temperature refrigerant flowing out of the condensing device 122 flows into the liquid storage tank 16, and then flows into the third branch 14 through the first expansion valve 141, and exchanges heat in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251 flows back to the compressor 11, thereby realizing the circulation of the refrigerant.

[0123] In the cooling liquid circuit 2, the inlet of the passenger compartment circuit 22 communicates with the outlet thereof, and the cooling liquid in the passenger compartment circuit 22 flows into the condensing device 122 under the action of the core water pump 223 to exchange heat, thereby absorbing heat to heat the heating core 221, and then under the action of the air blower, hot air can be generated and delivered to the passenger compartment to realize the heating effect on the passenger compartment.

[0124] At the same time, the outlet of the battery circuit 23 communicates with the inlet of the cooling circuit 25, and the outlet of the cooling circuit 25 communicates with the inlet of the battery circuit 23, so that the battery circuit 23 and the cooling circuit 25 are connected in series through the multi-way valve 21.

[0125] The battery heat exchange element 231 continuously generates heat during operation, and the cooling liquid flows into the battery circuit 23 from the third communication port 213 to absorb the heat generated by the battery heat exchange element 231, and then flows out from the fourth communication port 214, and then flows into the cooling circuit 25 from the seventh communication port 217 to release heat through the cooling device 251, and then flows out from the eighth communication port 218, and then flows back to the battery circuit 23 from the third communication port 213, thereby realizing the heat dissipation effect of the battery circuit 23.

[0126] In addition, the inlet of the motor loop 24 is communicated with the outlet of the motor loop 24, and the cooling liquid in the motor loop 24 circulates under the action of the motor water pump 243, and because the motor heat exchange element 241 and the power module 242 continuously generate heat during the working process, the two can have a suitable working temperature in the winter environment, so that the motor heat exchange element 241 and the power module 242 can work normally.

[0127] Therefore, the vehicle thermal management system in the embodiment can switch to the fourth working mode in the winter environment, which not only enables the cooling device 251 to transfer the heat of the refrigerant to the cooling liquid, so that the cooling liquid with the temperature increased after absorbing the heat can heat the heater core 221, which is conducive to reducing the energy consumption and improving the energy utilization rate, but also meets the cooling demand of the battery loop 23, and the motor loop 24 can also meet its own heating demand by realizing self-circulation through the multi-way valve 21, thereby ensuring the stability and reliability of the battery heat exchange element 231, the motor heat exchange element 241 and the power module 242 during the working process.

[0128] In a possible implementation, when the heat obtained by the cooling liquid in the passenger compartment loop 22 through heat exchange cannot meet the heating demand of the passenger compartment, the heating device 222 in the passenger compartment loop 22 can also be started to heat it, so as to further improve the heating effect on the passenger compartment.

[0129] In a specific implementation, as shown in FIGS. 3 and 7, the vehicle thermal management system further includes a fifth working mode, when the battery loop 23 is in the fifth temperature range and the motor loop 24 is in the third temperature range, the vehicle thermal management system switches to the fifth working mode, in the fifth working mode, the first communication port 211 is communicated with the fourth communication port 214, the fifth communication port 215 is communicated with the eighth communication port 218, and the sixth communication port 216 is communicated with the seventh communication port 217.

[0130] The heater core 221 is in an open state, the condensing device 122 is in an open state, the heat exchange device 132 is in a closed state, the cooling device 251 is in an open state, the evaporating device 152 is in a closed state, and the three-way valve 27 is in an open state. The first interface is communicated with the third interface, the heater core 221 is used for heating the passenger compartment and heating the battery heat exchange element 231, and the cooling device 251 is used for cooling the motor heat exchange element 241.

[0131] In the embodiment, when the battery circuit 23 is in the fifth temperature range and the motor circuit 24 is in the third temperature range, the temperature of the battery circuit 23 is low and the temperature of the motor circuit 24 is high, so that the fifth working mode is suitable for winter environment, and when the passenger compartment and the battery heat exchange element 231 both have heating requirements and the motor heat exchange element 241 has cooling requirements, the first branch 12 and the passenger compartment circuit 22 are heat exchanged through the condensing device 122, and the passenger compartment circuit 22 and the battery circuit 23 are communicated through the three-way valve 27, so as to meet the heating requirements of the passenger compartment and the battery heat exchange element 231, and the motor circuit 24 is cooled through the cooling device 251, so as to meet the cooling requirements of the motor heat exchange element 241.

[0132] In the refrigerant circuit 1, the first stop valve 121 is opened, the second stop valve 131 is closed, the first expansion valve 141 is opened, the second expansion valve 151 is closed, the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and is heat exchanged in the condensing device 122 to release heat, so that the low-temperature refrigerant flowing out of the condensing device 122 flows into the liquid storage tank 16, and then flows into the third branch 14 through the first expansion valve 141, and is heat exchanged in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251 flows back to the compressor 11, so as to realize the circulation of the refrigerant.

[0133] In the cooling liquid circuit 2, the outlet of the passenger compartment circuit 22 and the inlet of the battery circuit 23 are communicated, and the outlet of the battery circuit 23 and the inlet of the passenger compartment circuit 22 are communicated. Specifically, the cooling liquid in the passenger compartment circuit 22 flows into the condensing device 122 under the action of the warm core water pump 223 to be heat exchanged, so as to absorb heat to heat and warm up the warm air core 221. After the cooling liquid flows out of the warm air core 221, the first interface and the third interface of the three-way valve 27 are communicated, so that the cooling liquid flowing out of the warm air core 221 flows into the battery circuit 23 through the three-way valve 27, and flows to the battery heat exchange element 231 under the action of the battery water pump 232, so as to heat and warm up the battery heat exchange element 231. After the cooling liquid flows out of the battery heat exchange element 231, it flows back to the passenger compartment circuit 22 through the multi-way valve 21, so as to complete the circulation and realize the heating effect on the passenger compartment and the battery heat exchange element 231.

[0134] At the same time, the outlet of the motor circuit 24 and the inlet of the cooling circuit 25 are communicated, and the outlet of the cooling circuit 25 and the inlet of the motor circuit 24 are communicated, so that the motor circuit 24 and the cooling circuit 25 are connected in series through the multi-way valve 21.

[0135] The motor heat exchange element 241 and the power module 242 continuously generate heat during operation. The cooling liquid flows into the motor circuit 24 from the fifth communication port 215 to absorb the heat generated by the motor heat exchange element 241 and the power module 242, and then flows out from the sixth communication port 216. After the heat absorption is completed, the cooling liquid flows into the cooling circuit 25 from the seventh communication port 217 to release heat through the cooling device 251, and then flows out from the eighth communication port 218. After the heat release is completed, the cooling liquid flows back to the motor circuit 24 from the fifth communication port 215, thereby achieving the heat dissipation effect of the motor circuit 24, so that the motor circuit 24 and the battery circuit 23 can have appropriate operating temperatures in winter environment, thereby ensuring the normal operation of the motor heat exchange element 241 and the power module 242.

[0136] Therefore, the vehicle thermal management system in the embodiment can switch to the fifth operating mode in winter environment, and the three-way valve 27 is used to communicate the passenger compartment circuit 22 and the battery circuit 23, so as to improve the heating efficiency of the passenger compartment circuit 22 and the battery circuit 23. At the same time, the heat dissipation demand of the motor circuit 24 can also be met, thereby ensuring the stability and reliability of the battery heat exchange element 231, the motor heat exchange element 241 and the power module 242 during operation.

[0137] In a possible implementation, when the heat obtained by the cooling liquid in the passenger compartment circuit 22 and the battery circuit 23 through heat exchange cannot meet the heating demand of the two circuits, the heating device 222 in the passenger compartment circuit 22 can also be started to heat the passenger compartment circuit 22, so as to further improve the heating effect of the passenger compartment and the battery heat exchange element 231.

[0138] In a possible implementation, the inlet of the heat dissipation circuit 26 can also be communicated with the outlet of the cooling circuit 25, so that the outlet of the cooling circuit 25 is communicated with the inlet of the motor circuit 24 and the inlet of the heat dissipation circuit 26 in proportion. Part of the cooling liquid flowing out of the cooling circuit 25 flows into the motor circuit 24 to cool the motor heat exchange element 241 and the power module 242, and the other part of the cooling liquid flows into the heat dissipation circuit 26 to be cooled again by the heat dissipation device 261, and then flows into the motor circuit 24 to cool the motor heat exchange element 241 and the power module 242, which is conducive to further improving the heat dissipation effect of the motor circuit 24.

[0139] In a specific embodiment, as shown in FIGS. 3 and 8, the vehicle thermal management system further includes a sixth operating mode. When the battery circuit 23 is in the sixth temperature range and the motor circuit 24 is in the third temperature range, the vehicle thermal management system switches to the sixth operating mode. In the sixth operating mode, the first communication port 211 is communicated with the second communication port 212, the third communication port 213 is communicated with the fourth communication port 214, the fifth communication port 215 is communicated with the eighth communication port 218, and the sixth communication port 216 is communicated with the seventh communication port 217.

[0140] The warm air core 221 is in an open state, the one-way valve is in an open state, the condensing device 122 is in an open state, the heat exchange device 132 is in a closed state, the cooling device 251 is in an open state, the evaporating device 152 is in a closed state, the three-way valve 27 is in an open state, the first interface, the second interface and the third interface are in communication with each other, the warm air core 221 is used for heating the passenger compartment and heating the battery heat exchange element 231, and the cooling device 251 is used for cooling the motor heat exchange element 241.

[0141] In the embodiment of the application, when the battery circuit 23 is in the sixth temperature range and the motor circuit 24 is in the third temperature range, the temperature of the battery circuit 23 is relatively high, and the temperature of the motor circuit 24 is relatively high, so that the sixth working mode is suitable for a winter environment, and when the passenger compartment and the battery heat exchange element 231 both have a rapid heating demand and the motor heat exchange element 241 has a heat dissipation demand, the first branch 12 and the passenger compartment circuit 22 are heat exchanged through the condensing device 122, and part of the passenger compartment circuit 22 and the battery circuit 23 are communicated through the three-way valve 27, so as to meet the rapid heating demand of the passenger compartment and the battery heat exchange element 231, and the motor circuit 24 is cooled and cooled through the cooling device 251, so as to meet the heat dissipation demand of the motor heat exchange element 241.

[0142] In the refrigerant circuit 1, the first stop valve 121 is open, the second stop valve 131 is closed, the first expansion valve 141 is open, the second expansion valve 151 is closed, the high-temperature refrigerant flowing out of the compressor 11 flows into the first branch 12 through the first stop valve 121, and is heat exchanged in the condensing device 122 to release heat, so that the low-temperature refrigerant flowing out of the condensing device 122 flows into the liquid storage tank 16, and then flows into the third branch 14 through the first expansion valve 141, and is heat exchanged in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251 flows back to the compressor 11, so as to realize the circulation of the refrigerant.

[0143] In the cooling liquid circuit 2, the inlet of the passenger cabin circuit 22 is communicated with the outlet thereof, the inlet of the battery circuit 23 is communicated with the outlet thereof, and the passenger cabin circuit 22 and the battery circuit 23 are communicated through the three-way valve 27. Specifically, the first interface, the second interface and the third interface of the three-way valve 27 are communicated with each other. When the cooling liquid in the passenger cabin circuit 22 flows into the condensing device 122 under the action of the warm core water pump 223 to absorb heat and heat the warm core 221, the cooling liquid flowing out of the warm core 221 is partially guided to the second communication port 212 through the first interface and the second interface of the three-way valve 27, and then flows back to the first communication port 211 through the multi-way valve 21, so as to realize the circulation of the passenger cabin circuit 22, and then flow into the condensing device 122 to absorb heat and heat exchange. Another part is guided to the battery circuit 23 through the first interface and the third interface of the three-way valve 27, and flows to the battery heat exchange element 231 under the action of the battery water pump 232, so as to heat the battery heat exchange element 231. After the cooling liquid flows out of the battery heat exchange element 231, it is divided into two parts. One part flows to the fourth communication port 214 and then flows back to the third communication port 213 through the multi-way valve 21, so as to realize the circulation of the battery circuit 23. The other part flows to the passenger cabin circuit 22 through the one-way valve and merges with the cooling liquid flowing back to the first communication port 211 in the passenger cabin circuit 22.

[0144] The opening degree of the second interface and the third interface of the three-way valve 27 can be adjusted in proportion according to the temperature of the cooling liquid in the passenger cabin circuit 22 and the battery circuit 23. For example, when the temperature of the cooling liquid in the passenger cabin circuit 22 is higher than that in the battery circuit 23, the opening degree of the second interface can be smaller than that of the third interface, so as to increase the flow into the battery circuit 23. When the temperature of the cooling liquid in the passenger cabin circuit 22 is lower than that in the battery circuit 23, the opening degree of the second interface can be greater than that of the third interface, so as to increase the flow into the passenger cabin circuit 22.

[0145] At the same time, the outlet of the motor circuit 24 is communicated with the inlet of the cooling circuit 25, and the outlet of the cooling circuit 25 is communicated with the inlet of the motor circuit 24, so as to connect the motor circuit 24 and the cooling circuit 25 in series through the multi-way valve 21.

[0146] The motor heat exchange element 241 and the power module 242 continuously generate heat during operation. The cooling liquid flows into the motor loop 24 from the fifth communication port 215 to absorb the heat generated by the motor heat exchange element 241 and the power module 242, and then flows out from the sixth communication port 216. After the heat absorption is completed, the cooling liquid flows into the cooling loop 25 from the seventh communication port 217 to release heat through the cooling device 251, and then flows out from the eighth communication port 218. After the heat release is completed, the cooling liquid flows back to the motor loop 24 from the fifth communication port 215, thereby achieving the heat dissipation effect of the motor loop 24, so that the motor loop 24 and the cooling loop 25 can have appropriate working temperatures in winter environment, so as to ensure that the motor heat exchange element 241 and the power module 242 can work normally.

[0147] Therefore, the vehicle thermal management system in the embodiment can switch to the sixth working mode in winter environment. By connecting the passenger cabin loop 22 and the battery loop 23 through the three-way valve 27 on the basis of self-circulation of the two loops, the path of part of the cooling liquid flowing to the condensing device 122 can be shortened, so that the heating efficiency of the passenger cabin and the battery heat exchange element 231 can be improved, which is beneficial to reduce the possibility of performance degradation of the battery heat exchange element 231 during charging and discharging in winter environment, thereby reducing the damage of low temperature environment to the battery heat exchange element 231 and improving the service life of the battery heat exchange element 231. At the same time, the heat dissipation demand of the motor loop 24 can be met, thereby ensuring the stability and reliability of the battery heat exchange element 231, the motor heat exchange element 241 and the power module 242 during operation.

[0148] In a possible implementation, when the heat obtained by heat exchange of the cooling liquid in the passenger cabin loop 22 and the battery loop 23 cannot meet the heating demand of the two loops, the heating device 222 in the passenger cabin loop 22 can also be started to heat the passenger cabin loop 22, so as to further improve the heating effect of the passenger cabin and the battery heat exchange element 231.

[0149] In a specific implementation, as shown in FIG. 3 and FIG. 11, the vehicle thermal management system further includes a seventh working mode. When the battery loop 23 is in the third temperature range and the motor loop 24 is in the sixth temperature range, the vehicle thermal management system switches to the seventh working mode. In the seventh working mode, the third communication port 213 is in communication with the eighth communication port 218, the fourth communication port 214 is in communication with the seventh communication port 217, the ninth communication port 219 is in communication with the sixth communication port 216, and the compressor 11 is in communication with the evaporating device 152 and the cooling device 251 through the heat exchange device 132.

[0150] The warm air core 221 is in a closed state, the heat dissipation device 261 is in an open state, the condensing device 122 is in a closed state, the heat exchange device 132 is in an open state, the cooling device 251 is in an open state, and the evaporating device 152 is in an open state. The evaporating device 152 is used for refrigerating the passenger compartment, the cooling device 251 is used for cooling the battery heat exchange element 231, and the heat dissipation device 261 is used for dissipating heat from the motor heat exchange element 241.

[0151] In the embodiment of the present application, when the battery circuit 23 is in the third temperature range and the motor circuit 24 is in the sixth temperature range, the temperature of the battery circuit 23 is relatively high, and the temperature of the motor circuit 24 is relatively high. The seventh working mode is suitable for a summer environment, and when the passenger compartment and the battery heat exchange element 231 both have refrigeration requirements and the motor heat exchange element 241 has heat dissipation requirements, the evaporating device 152 can evaporate the coolant to absorb heat, thereby achieving the refrigeration effect of the passenger compartment. The cooling device 251 exchanges heat between the coolant and the refrigerant, thereby achieving the refrigeration effect of the battery heat exchange element 231. The heat dissipation device 261 achieves the heat dissipation effect of the motor heat exchange element 241.

[0152] In the refrigerant circuit 1, the first stop valve 121 is closed, the second stop valve 131 is open, the first expansion valve 141 is open, the second expansion valve 151 is open, and the high-temperature refrigerant flowing out of the compressor 11 flows into the second branch 13 through the second stop valve 131 and exchanges heat in the heat exchange device 132 to release heat. The low-temperature refrigerant flowing out of the heat exchange device 132 flows into the liquid storage tank 16, and then flows into the third branch 14 and the fourth branch 15 through the first expansion valve 141 and the second expansion valve 151, respectively. The refrigerant in the third branch 14 exchanges heat in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251, and the refrigerant in the fourth branch 15 evaporates in the evaporating device 152 to absorb heat. The medium-temperature refrigerant flowing out of the evaporating device 152 and the medium-temperature refrigerant flowing out of the cooling device 251 flow together to the compressor 11, thereby realizing the circulation of the refrigerant.

[0153] In the coolant circuit 2, the outlet of the battery circuit 23 communicates with the inlet of the cooling circuit 25, and the outlet of the cooling circuit 25 communicates with the inlet of the battery circuit 23, so that the battery circuit 23 and the cooling circuit 25 are connected in series through the multi-way valve 21. Specifically, the coolant flows into the battery circuit 23 from the third communication port 213 to absorb the heat generated by the battery heat exchange element 231, and then flows out from the fourth communication port 214. After the heat absorption is completed, the coolant flows into the cooling circuit 25 from the seventh communication port 217 to release heat through the cooling device 251, and then flows out from the eighth communication port 218. After the heat release is completed, the coolant flows back to the battery circuit 23 from the third communication port 213, thereby realizing the refrigeration effect of the battery circuit 23.

[0154] In addition, the inlet of the motor loop 24 is communicated with the outlet of the heat dissipation loop 26, and the inlet of the heat dissipation loop 26 is communicated with the outlet of the motor loop 24, so that the motor loop 24 and the heat dissipation loop 26 are connected in series through the multi-way valve 21. Specifically, the cooling liquid in the motor loop 24 flows out from the sixth communication port 216, flows into the heat dissipation loop 26 from the ninth communication port 219, releases heat through the heat dissipation device 261, and after the heat release is completed, flows to the motor heat exchange element 241 and the power module 242 through the motor water pump 243 to absorb the heat generated by the two, and then flows back to the heat dissipation loop 26 through the sixth communication port 216, so as to realize the heat dissipation effect of the motor loop 24.

[0155] Therefore, the vehicle thermal management system in the embodiment can switch to the seventh working mode in a summer environment, so as to independently cool the passenger compartment, the battery heat exchange element 231 and the motor heat exchange element 241 respectively, which is beneficial to improve the overall cooling effect, so as to guarantee the comfort of the passenger compartment and the stability and reliability of the battery heat exchange element 231 and the motor heat exchange element 241 in the working process.

[0156] In a possible implementation, as shown in FIG. 3 and FIG. 9, the vehicle thermal management system further includes an eighth working mode. In the eighth working mode, the multi-way valve 21 is closed, the compressor 11 is communicated with the evaporation device 152 through the heat exchange device 132, the heater core 221 is in a closed state, and the evaporation device 152 is in an open state, and the evaporation device 152 is used to cool the passenger compartment.

[0157] In the embodiment, the eighth working mode is applicable to a summer environment. In the refrigerant circuit 1, the first stop valve 121 is closed, the second stop valve 131 is opened, the first expansion valve 141 is closed, and the second expansion valve 151 is opened. The high-temperature refrigerant flowing out of the compressor 11 flows into the second branch 13 through the second stop valve 131, exchanges heat in the heat exchange device 132 to release heat, so that the low-temperature refrigerant flowing out of the heat exchange device 132 flows into the liquid storage tank 16, and then flows into the third branch 14 through the second expansion valve 151, and evaporates in the evaporation device 152 to absorb heat, so as to reduce the surface temperature of the evaporation device 152. Then, the cold air generated by the air blower is transported into the passenger compartment, so as to realize the cooling effect of the passenger compartment.

[0158] Therefore, the vehicle thermal management system in the embodiment can switch to the eighth working mode in a summer environment, and the refrigerant is cooled through the heat exchange device 132 and then absorbs heat in the evaporation device 152, so as to realize the cooling effect of the passenger compartment, which is beneficial to reduce energy consumption and prolong the endurance of the vehicle.

[0159] In a possible implementation, as shown in FIG. 3 and FIG. 10, the vehicle thermal management system further includes a ninth working mode, in which the third communication port 213 communicates with the eighth communication port 218, the fourth communication port 214 communicates with the seventh communication port 217, and the compressor 11 communicates with the cooling device 251 through the heat exchange device 132.

[0160] The warm air core 221 is in a closed state, the evaporative device 152 is in a closed state, and the cooling device 251 is used for cooling the battery heat exchange element 231.

[0161] In the embodiment of the present application, the ninth working mode is applicable to a summer environment. In the refrigerant circuit 1, the first stop valve 121 is closed, the second stop valve 131 is opened, the first expansion valve 141 is opened, and the second expansion valve 151 is closed. The high-temperature refrigerant flowing out of the compressor 11 flows into the second branch 13 through the second stop valve 131, and exchanges heat in the heat exchange device 132 to release heat, so that the low-temperature refrigerant flowing out of the heat exchange device 132 flows into the liquid storage tank 16, and then flows into the third branch 14 through the first expansion valve 141, and exchanges heat in the cooling device 251 to absorb heat, so that the medium-temperature refrigerant flowing out of the cooling device 251 flows back to the compressor 11, thereby realizing the circulation of the refrigerant.

[0162] In the cooling liquid circuit 2, the outlet of the battery circuit 23 communicates with the inlet of the cooling circuit 25, and the outlet of the cooling circuit 25 communicates with the inlet of the battery circuit 23, so that the battery circuit 23 and the cooling circuit 25 are connected in series through the multi-way valve 21. Specifically, the cooling liquid in the battery circuit 23 absorbs the heat of the battery heat exchange element 231 under the action of the battery water pump 232, and then flows to the cooling device 251, and exchanges heat in the cooling device 251 to release heat. The cooling liquid in the cooling device 251 flows back to the battery circuit 23, thereby realizing the circulation of the cooling liquid.

[0163] Therefore, the vehicle thermal management system in the embodiment can switch to the ninth working mode in a summer environment, and the refrigerant absorbs the heat of the cooling liquid through the cooling device 251, thereby realizing the refrigeration effect on the battery heat exchange element 231, which is beneficial to reduce the possibility of damage to the battery heat exchange element 231 in a high-temperature environment in summer, and improve the service life of the battery heat exchange element 231.

[0164] In a possible implementation, as shown in FIG. 3 and FIG. 12, the vehicle thermal management system further includes a tenth working mode, in which the third communication port 213 communicates with the eighth communication port 218, the fourth communication port 214 communicates with the fifth communication port 215, the sixth communication port 216 communicates with the seventh communication port 217, the refrigerant circuit 1 is in a closed state, and the motor heat exchange element 241 is used for heating the battery heat exchange element 231.

[0165] In the embodiment, the liquid outlet of the battery circuit 23 is in communication with the liquid inlet of the motor circuit 24, the liquid outlet of the motor circuit 24 is in communication with the liquid inlet of the cooling circuit 25, and the liquid outlet of the cooling circuit 25 is in communication with the liquid inlet of the battery circuit 23, so that the battery circuit 23 and the motor circuit 24 are in communication through the cooling circuit 25, thereby enabling the motor circuit 24 to heat the battery circuit 23, so that the tenth working mode can be applied to a low-temperature environment.

[0166] Specifically, the cooling liquid flowing out of the motor circuit 24 has a relatively high temperature, which can heat the battery heat exchange element 231 in the battery circuit 23, reduce the possibility of performance degradation of the battery heat exchange element 231 in a low-temperature environment, reduce the damage of the low-temperature environment to the battery heat exchange element 231, and improve the service life of the battery heat exchange element 231. At the same time, heat exchange occurs between the cooling liquid and the battery heat exchange element 231 during the heating process of the battery heat exchange element 231 by the cooling liquid with a high temperature, i.e., the battery heat exchange element 231 is heated and the cooling liquid is cooled, so that the cooling liquid flowing out of the battery circuit 23 has a relatively low temperature, which can cool the motor heat exchange element 241 and the power module 242 in the motor circuit 24, thereby achieving the purpose of heat dissipation, reducing the possibility of damage to the internal components of the motor heat exchange element 241 due to excessively high temperature, improving the stability and reliability of the motor heat exchange element 241 during operation, and prolonging the service life of the motor heat exchange element 241.

[0167] Therefore, the vehicle thermal management system in the embodiment can switch to the tenth working mode in a low-temperature environment, heat and warm up the battery heat exchange element 231 in the battery circuit 23 by the cooling liquid with a relatively high temperature flowing out of the motor circuit 24, and cool and lower the temperature of the motor heat exchange element 241 in the motor circuit 24 by the cooling liquid with a relatively low temperature flowing out of the battery circuit 23, thereby simultaneously meeting the cooling and heating requirements of the motor heat exchange element 241 and the battery heat exchange element 231, which is conducive to improving the utilization rate of energy and reducing energy consumption.

[0168] In a possible implementation, the battery circuit 23 can also be directly in communication with the motor circuit 24 through the multi-way valve 21, i.e., the third communication port 213 is in communication with the sixth communication port 216, and the fourth communication port 214 is in communication with the fifth communication port 215, so as to further shorten the flow path of the cooling liquid and improve the heating efficiency of the battery circuit 23 and the cooling efficiency of the motor circuit 24.

[0169] In a possible implementation, as shown in FIG. 3 and FIG. 13, the vehicle thermal management system further includes an eleventh working mode, in which the fifth communication port 215 is in communication with the sixth communication port 216, the refrigerant circuit 1 is in a closed state, and the motor circuit 24 is in a self-circulation heat accumulation state.

[0170] In the embodiment, the liquid inlet of the motor loop 24 is communicated with the liquid outlet of the motor loop 24, so that the cooling liquid in the motor loop 24 circulates under the action of the motor water pump 243, so that the temperature of the cooling liquid gradually rises, which can guarantee the stability of the motor heat exchange element 241 working in a low temperature environment, and prepare for the start of the vehicle and the switching to other working modes, and the self-circulation heat storage mode can also reduce energy consumption, which is conducive to prolonging the endurance of the vehicle.

[0171] In a possible implementation, as shown in FIG. 3 and FIG. 14, the vehicle thermal management system further includes a twelfth working mode, in which the communication ports of the multi-way valve 21 are communicated with each other, and the interfaces of the three-way valve 27 are communicated with each other, so as to add cooling liquid into the cooling liquid loop 2.

[0172] In the embodiment, the liquid outlet of the passenger compartment loop 22 is communicated with the liquid inlet of the cooling loop 25, the liquid outlet of the cooling loop 25 is proportionally communicated with the liquid inlet of the motor loop 24 and the liquid inlet of the heat dissipation loop 26, the liquid outlet of the motor loop 24 is communicated with the liquid inlet of the battery loop 23, and the liquid outlet of the battery loop 23 is communicated with the liquid inlet of the passenger compartment loop 22, wherein the first interface, the second interface and the third interface of the three-way valve 27 are communicated with each other, so that the cooling liquid flowing into the passenger compartment loop 22 can be divided by the three-way valve 27, part of which flows to the cooling loop 25, and the other part flows to the battery loop 23, so that the cooling liquid can flow through each loop, so as to guarantee the sufficient flow in the cooling liquid loop 2, thereby further guaranteeing the reliability of the vehicle thermal management system in the working process.

[0173] The embodiment of the present application also provides a vehicle, which comprises a vehicle body and a vehicle thermal management system mounted on the vehicle body, and the vehicle thermal management system is the vehicle thermal management system described above.

[0174] In the embodiment, when the vehicle is provided with the vehicle thermal management system described above, the vehicle at least includes twelve working states to meet different needs.

[0175] In the spring and autumn environment, the vehicle thermal management system can be switched to the first working mode or the second working mode to meet the dehumidification needs in different states; in the winter environment, the vehicle thermal management system can be switched to the third working mode, the fourth working mode, the fifth working mode, the sixth working mode and the tenth working mode to meet the heating needs in different states; in the summer environment, the vehicle thermal management system can be switched to the seventh working mode, the eighth working mode and the ninth working mode to meet the refrigeration needs in different states, so as to guarantee the comfort of the passenger compartment and improve the stability and reliability of the battery heat exchange element 231 and the motor heat exchange element 241 in the working process.

[0176] Meanwhile, the eleventh working mode can be switched to before the vehicle starts, so as to prepare for the starting of the vehicle and the switching to other working modes, and the twelfth working mode can be switched to when the vehicle is maintained, so that the coolant can flow through each circuit, and the flow in the coolant circuit 2 is sufficient.

[0177] Therefore, the vehicle in the embodiment can have different working states in different environments, the influence of the environmental factors on the passenger compartment, the battery heat exchange element 231, the motor heat exchange element 241 and other components is reduced, the comfort of the passenger compartment is improved, the service life of each component is prolonged, and the overall working performance of the vehicle is optimized.

[0178] The above describes the structure, features and effects of the application according to the embodiments shown in the drawings, and the above is only the preferred embodiment of the application, but the application is not limited to the embodiments shown in the drawings, any change or modification made according to the idea of the application, or the equivalent embodiment with equivalent changes within the scope of the application, should be within the protection scope of the application.

Claims

1. A vehicle thermal management system, characterized by, The vehicle thermal management system comprises: a refrigerant circuit provided with a compressor, a condensing device, a heat exchange device and an evaporating device; a cooling liquid circuit provided with a multi-way valve, a heater core, a battery heat exchange element, a motor heat exchange element, a cooling device and a heat dissipation device, the multi-way valve comprising a valve body and a valve core, the valve body being provided with a plurality of communication ports, the cooling liquid circuit further comprising a passenger cabin circuit, a battery circuit, a motor circuit, a cooling circuit and a heat dissipation circuit; the heater core and the first and second communication ports of the valve body are communicated through the passenger cabin circuit; the battery heat exchange element and the third and fourth communication ports of the valve body are communicated through the battery circuit; the motor heat exchange element and the fifth and sixth communication ports of the valve body are communicated through the motor circuit; the cooling device and the seventh and eighth communication ports of the valve body are communicated through the cooling circuit; the heat dissipation device and the ninth communication port of the valve body and the motor circuit are communicated through the heat dissipation circuit; the condensing device and the heat exchange device are connected to the liquid outlet of the compressor, and the condensing device and the heat exchange device are arranged in parallel, the refrigerant circuit exchanges heat with the passenger cabin circuit through the condensing device, and the refrigerant circuit exchanges heat with the external environment through the heat exchange device.

2. The vehicle thermal management system of claim 1, wherein, The cooling device is further communicated with the refrigerant circuit, in the refrigerant circuit, the liquid inlet of the cooling device is communicated with the liquid outlet of the condensing device or the liquid outlet of the heat exchange device, and the liquid outlet of the cooling device is communicated with the liquid inlet of the compressor.

3. The vehicle thermal management system of claim 2, wherein, The condensing device is further communicated with the passenger cabin circuit, in the passenger cabin circuit, the liquid inlet of the condensing device is communicated with the first communication port, and the liquid outlet of the condensing device is communicated with the liquid inlet of the heater core. In the refrigerant circuit, the liquid inlet of the condensing device is communicated with the liquid outlet of the compressor, and the liquid outlet of the condensing device is communicated with the cooling device and / or the evaporating device.

4. The vehicle thermal management system of claim 2, wherein, In the refrigerant circuit, the liquid inlet of the heat exchange device is communicated with the liquid outlet of the compressor, and the liquid outlet of the heat exchange device is communicated with the cooling device and / or the evaporating device.

5. The vehicle thermal management system of claim 2, wherein, In the refrigerant circuit, the liquid inlet of the evaporating device is communicated with the liquid outlet of the condensing device or the liquid outlet of the heat exchange device, and the liquid outlet of the evaporating device is communicated with the liquid inlet of the compressor, so that the evaporating device is arranged in parallel with the cooling device.

6. The vehicle thermal management system of claim 1, wherein, The cooling liquid circuit is further provided with a three-way valve for communicating the passenger cabin circuit and the battery circuit; the first interface of the three-way valve is communicated with the liquid outlet of the heater core, the second interface of the three-way valve is communicated with the second communication port, and the third interface of the three-way valve is communicated with the liquid inlet of the battery heat exchange element.

7. The vehicle thermal management system of claim 1, wherein, The cooling liquid circuit is further provided with a one-way valve, the liquid inlet of the one-way valve is communicated with the liquid outlet of the battery circuit, and the liquid outlet of the one-way valve is communicated with the liquid inlet of the passenger cabin circuit.

8. The vehicle thermal management system of any one of claims 1-7, wherein, The valve core is capable of rotating relative to the valve body, the vehicle thermal management system further comprises a control device and a plurality of detection devices, the control device is in signal connection with the valve core, the plurality of detection devices are respectively connected in series in each loop for detecting the temperature in each loop, and the control device is used for controlling the valve core to start or stop rotating relative to the valve body according to the detection results of the detection devices.

9. The vehicle thermal management system of claim 8, wherein, The vehicle thermal management system comprises a first working mode and a second working mode; When the passenger cabin loop is in a first temperature range, the vehicle thermal management system switches to the first working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, and the sixth communication port is in communication with the seventh communication port; The heating core is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in an open state; When the passenger cabin loop is in a second temperature range, the vehicle thermal management system switches to the second working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, and the sixth communication port is in communication with the seventh communication port; The heating core is in an open state, the condensing device is in a closed state, the heat exchange device is in an open state, the cooling device is in an open state, and the evaporating device is in an open state.

10. The vehicle thermal management system of claim 8, wherein, In the first working mode and / or the second working mode, the ninth communication port and the fifth communication port are both in communication with the eighth communication port, and the heat dissipation device is in an open state.

11. The vehicle thermal management system of claim 8, wherein, The vehicle thermal management system further comprises a third working mode, when the battery loop and the motor loop are both in a third temperature range, the vehicle thermal management system switches to the third working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the eighth communication port, the fourth communication port is in communication with the fifth communication port, and the sixth communication port is in communication with the seventh communication port; The heating core is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in a closed state.

12. The vehicle thermal management system of claim 8, wherein, The vehicle thermal management system further comprises a fourth working mode, when the battery loop is in a fourth temperature range and the motor loop is in a fifth temperature range, the vehicle thermal management system switches to the fourth working mode, in which the first communication port is in communication with the second communication port, the third communication port is in communication with the eighth communication port, the fourth communication port is in communication with the seventh communication port, and the fifth communication port is in communication with the sixth communication port; The warm air core is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in a closed state.

13. The vehicle thermal management system of claim 8, wherein, The cooling liquid circuit is further provided with a three-way valve, a first interface of the three-way valve is in communication with the liquid outlet of the warm air core, a second interface of the three-way valve is in communication with the second communication port, and a third interface of the three-way valve is in communication with the liquid inlet of the battery heat exchange element; The vehicle thermal management system further includes a fifth working mode, when the battery circuit is in a fifth temperature range and the motor circuit is in a third temperature range, the vehicle thermal management system switches to the fifth working mode, in the fifth working mode, the first communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, the sixth communication port is in communication with the seventh communication port, and the first interface is in communication with the third interface; The warm air core is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in a closed state.

14. The vehicle thermal management system of claim 12, wherein, The cooling liquid circuit is further provided with a one-way valve, a liquid inlet of the one-way valve is in communication with a liquid outlet of the battery circuit, and a liquid outlet of the one-way valve is in communication with a liquid inlet of the passenger cabin circuit; The vehicle thermal management system further includes a sixth working mode, when the battery circuit is in a sixth temperature range and the motor circuit is in a third temperature range, the vehicle thermal management system switches to the sixth working mode, in the sixth working mode, the first communication port is in communication with the second communication port, the third communication port is in communication with the fourth communication port, the fifth communication port is in communication with the eighth communication port, the sixth communication port is in communication with the seventh communication port, and the first interface, the second interface and the third interface are in communication with each other; The warm air core is in an open state, the one-way valve is in an open state, the condensing device is in an open state, the heat exchange device is in a closed state, the cooling device is in an open state, and the evaporating device is in a closed state.

15. The vehicle thermal management system of claim 8, wherein, The vehicle thermal management system further includes a seventh working mode, when the battery circuit is in a third temperature range and the motor circuit is in a sixth temperature range, the vehicle thermal management system switches to the seventh working mode, in the seventh working mode, the third communication port is in communication with the eighth communication port, the fourth communication port is in communication with the seventh communication port, and the ninth communication port is in communication with the sixth communication port; The warm air core is in a closed state, the heat dissipation device is in an open state, the condensing device is in a closed state, the heat exchange device is in an open state, the cooling device is in an open state, and the evaporating device is in an open state.

16. A vehicle characterized by comprising: The vehicle includes: A vehicle body; A vehicle thermal management system, the vehicle thermal management system being as claimed in any one of claims 1-15; The vehicle thermal management system is installed on the vehicle body.

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