Electric automobile and thermal management system thereof

Abstract

The invention relates to the field of automobile heat management, and provides an electric automobile and a heat management system thereof. A cooling liquid subsystem of the system comprises a five-way valve, a six-way valve, a PTC heating assembly, a battery cooling assembly, a motor cooling assembly, a radiator, a heat exchanger, a water-cooling condenser, a warm core, a one-way valve and a water pump, and the six-way valve is connected with the motor cooling assembly, the battery cooling assembly, the heat exchanger, the water-cooling condenser and the water pump. The five-way valve is connected with the PTC heating assembly, the motor cooling assembly, the heat exchanger, the radiator and the water pump, and a plurality of different loops of the cooling liquid subsystem are formed by switching the position states of the five-way valve and the six-way valve. Through the connection relation of the five-way valve and the six-way valve and the combination of the position state switching of the five-way valve and the six-way valve, the number of valve body assemblies can be reduced while heat transfer for refrigeration or heat dissipation can be effectively achieved, for example, the use of three-way valves with high cost can be reduced, and the system cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of automotive thermal management, and in particular to electric vehicles and their thermal management systems. Background Art

[0002] In recent years, with the development of new energy related technologies, the endurance and safety of electric vehicles have also been effectively improved. Moreover, because electric vehicles can effectively reduce exhaust emissions, reduce traditional energy consumption, improve travel efficiency, reduce travel costs and improve the level of traffic intelligence, the market recognition of electric vehicles is getting higher and higher, which has brought great convenience to people's travel.

[0003] Thermal management systems play an important role in improving battery efficiency and increasing the range of electric vehicles. Thermal management systems are used to manage the temperature of electric vehicles' motors, batteries, and passenger compartments, and can also effectively improve the safety and reliability of electric vehicle components, as well as the comfort of passengers. In order to achieve thermal management of motors, batteries, and passenger compartments, current thermal management systems require more valves in the coolant circuit, such as three-way valves, which are more expensive, which is not conducive to reducing system costs. Summary of the invention

[0004] In view of this, an embodiment of the present application provides an electric vehicle and a thermal management system thereof to solve the problem that the coolant circuit in the thermal management system in the prior art requires the use of more expensive valve bodies, including three-way valves, which is not conducive to reducing system costs.

[0005] A first aspect of an embodiment of the present application provides a thermal management system for an electric vehicle, the thermal management system including a coolant subsystem, the coolant subsystem including a five-way valve, a six-way valve, a PTC heating component, a battery cooling component, a motor cooling component, a radiator, a heat exchanger, a water-cooled condenser, a warm core, a one-way valve, and a water pump. The six-way valve is connected to the motor cooling component, the battery cooling component, the heat exchanger, the water-cooled condenser, and the water pump, and the five-way valve is connected to the PTC heating component, the motor cooling component, the heat exchanger, the radiator, and the water pump. By switching the positions of the five-way valve and the six-way valve, multiple different circuits of the coolant subsystem are formed.

[0006] A five-way valve and a six-way valve are set in the coolant subsystem, wherein the six-way valve is connected to the motor cooling assembly, the battery cooling assembly, the heat exchanger, the water-cooled condenser, and the water pump, and the five-way valve is connected to the PTC heating assembly, the motor cooling assembly, the heat exchanger, the radiator, and the water pump. By switching the positions of the five-way valve and the six-way valve, multiple different circuits of the coolant subsystem are formed. The coolant subsystem formed by the five-way valve and the six-way valve can effectively reduce the use of three-way and other valve body components in the subsystem, thereby reducing the system cost.

[0007] In combination with the first aspect, in a first possible implementation of the first aspect, the water pump includes a first water pump, a second water pump and a third water pump; wherein, the output end of the battery cooling assembly is connected to the input end of the PTC heating assembly through the first water pump, the input end of the battery cooling assembly is connected to the first interface of the six-way valve, the output end of the battery cooling assembly is connected to the second interface of the six-way valve, the output end of the PTC heating assembly is connected to the first interface of the five-way valve, and the input end of the first water pump is connected to the output end of the battery cooling assembly; the second interface of the five-way valve is connected to the third interface of the six-way valve through the heat exchanger; The third interface of the five-way valve is connected to the fourth interface of the six-way valve through the motor cooling assembly; the fifth interface of the six-way valve is connected to the fourth interface of the five-way valve through the second water pump, and the input end of the second water pump is connected to the fifth interface of the six-way valve; the fourth interface of the five-way valve is connected to the fifth interface of the five-way valve through the radiator; the fifth interface of the six-way valve is connected to the sixth interface of the six-way valve through the third water pump and the one-way valve in sequence, and the fifth interface of the six-way valve is connected to the sixth interface of the six-way valve through the water-cooled condenser and the warm core in sequence, and the input end of the third water pump is connected to the input end of the second water pump.

[0008] In the embodiment of the present application, the interfaces of the five-way valve and the six-way valve are connected to the battery cooling assembly, the PTC heating assembly, the motor cooling assembly, the radiator, and the heat exchanger, and the interfaces of the five-way valve and the six-way valve are selected, and the refrigerant is driven by the water pump to transport heat. When the temperature of the battery and / or the motor is high, the heat generated by the battery and / or the motor can be transported to the heat exchanger, and the heat is absorbed by the heat exchanger; or, the heat generated by the motor and / or the battery can be absorbed by the radiator. When the temperature of the motor and / or the battery is low, heat can be generated by the PTC heating assembly, and the heat can be transported to the battery and / or the motor through the coolant to improve the stability and reliability of the motor and / or the battery. And by connecting the interfaces of the five-way valve and the six-way valve according to the above-mentioned connection relationship, the heat transport for cooling or heat dissipation can be effectively realized, and the number of valve body components can be effectively reduced, such as reducing the use of the three-way valve with higher cost, which is conducive to reducing system costs.

[0009] In combination with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the coolant subsystem includes a first fluid replenishment port and a second fluid replenishment port, the first fluid replenishment port is used to replenish fluid for the second water pump and the third water pump, and the second fluid replenishment port is used to replenish fluid for the first water pump.

[0010] By setting two liquid replenishment ports, and replenishing the second and third water pumps through the first liquid replenishment port, and replenishing the first water pump through the second liquid replenishment port, the replenishment of the three water pumps can be completed, which is beneficial to improving the replenishment efficiency and exhaust efficiency. In addition, when the first and second liquid replenishment ports are replenished through the kettle, the risk of crossflow through the kettle during replenishment can be effectively reduced, which is beneficial to improving the stability of the system.

[0011] In combination with the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the first fluid inlet is located at a position where the second water pump and the third water pump are connected, and is the input end of the second water pump and the third water pump, and the second fluid inlet is located at the input end of the first water pump.

[0012] When replenishing at the first replenishing port, the replenished coolant can be pumped to the circuit where the radiator is located by the second water pump, or pumped to the circuit where the heat exchanger is located or the circuit where the motor cooling component is located via the five-way valve; or, the replenished coolant can be pumped to the circuit where the one-way valve is located by the third water pump. Directly replenishing three water pumps through two replenishing ports can not only improve the replenishing efficiency of the coolant subsystem, but also exhaust through the two replenishing ports, which is conducive to improving the exhaust efficiency of the coolant subsystem.

[0013] In combination with any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the system includes a control subsystem, and the control subsystem includes a system for obtaining operating status information and / or ambient temperature information of the electric vehicle, and controlling the opening and closing of each interface of the five-way valve and the six-way valve according to the operating status information and / or ambient temperature.

[0014] The control subsystem can be used to switch between different interfaces in the five-way valve and the six-way valve, so as to meet the cooling or heating requirements of different application scenarios. For example, the heat of the PTC heating component and / or the heat of the battery inputted through the first interface of the five-way valve can be connected to the second interface of the five-way valve to transfer the heat to the water-cooled condenser to heat the passenger compartment; the third interface of the five-way valve can be connected to transfer the heat of the motor and the heat of the battery to the passenger compartment.

[0015] In combination with the fourth possible implementation method of the first aspect, in the fifth possible implementation method of the first aspect, when the ambient temperature obtained by the control subsystem belongs to the preset first temperature range, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fifth interface of the five-way valve to be connected, the third interface of the six-way valve and the fifth interface of the six-way valve to be connected, and the first interface of the six-way valve and the fourth interface of the six-way valve to be connected.

[0016] In the first temperature range, it is a temperature range in which the working efficiency of the battery is low, such as the working efficiency of the battery is less than a predetermined efficiency threshold. The first temperature range may include a temperature range of 5-10 degrees Celsius. In this temperature range, since the working efficiency of the battery is not high, the battery needs to be heated to improve the working efficiency of the battery. Due to the low temperature, the passenger compartment needs to be heated to improve the riding comfort of the occupants. This embodiment controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fifth interface of the five-way valve to be connected, the third interface of the six-way valve and the fifth interface of the six-way valve to be connected, and the first interface of the six-way valve and the fourth interface of the six-way valve to be connected. The heat generated by the motor and the PTC heating component can be transported to the battery cooling component through the first water pump, thereby increasing the temperature of the battery and improving the working performance of the battery. The heat is absorbed from the air through the radiator, and the absorbed heat is transmitted to the passenger compartment via the heat exchanger to increase the temperature of the passenger compartment.

[0017] In combination with the fourth possible implementation method of the first aspect, in the sixth possible implementation method of the first aspect, when the operating status information acquired by the control subsystem includes that the driving time is greater than the first predetermined time, and the acquired ambient temperature is less than the first predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0018] When the operating status information is greater than the first predetermined time, the ambient temperature may be greater than the temperature in the first temperature range, for example, the ambient temperature can be any temperature between 10 and 20 degrees Celsius. At this temperature, as the use time increases, the temperature of the motor and the battery gradually increases. At this time, by controlling the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected, the heat generated by the PTC heating component and the motor is transported to the passenger compartment through the heat exchanger, and the coolant after heat exchange can cool the battery, thereby improving the working performance of the battery.

[0019] In combination with the fourth possible implementation method of the first aspect, in the seventh possible implementation method of the first aspect, when the ambient temperature obtained by the control subsystem is lower than the second predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0020] When the ambient temperature is lower than the second predetermined temperature (the second predetermined temperature can be any value between -5 and -15 degrees Celsius), the temperature of the battery is within the preset effective temperature range. At this time, it is not necessary to cool down or conduct heat to the battery, and the heat generated by the motor can be transferred to the passenger compartment through the heat exchanger. In this case, the first interface of the five-way valve and the third interface of the five-way valve can be controlled to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve can be controlled to be connected, the second interface of the six-way valve and the third interface of the six-way valve can be controlled to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve can be controlled to be connected, so that the heat generated by the PTC heating component and the motor is transferred to the passenger compartment through the heat exchanger, which improves the working stability of the motor and effectively heats the passenger compartment.

[0021] In combination with the fourth possible implementation method of the first aspect, in the eighth possible implementation method of the first aspect, when the operating status information acquired by the control subsystem includes the vehicle cold start status and the acquired ambient temperature is less than the preset third predetermined temperature, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0022] When the vehicle is in a cold start state, if the ambient temperature is low, such as less than -15 degrees Celsius, the performance of the motor is poor. At this time, the heat generated by the motor can be temporarily stopped from being transported to other locations, and the motor can be subjected to heat storage treatment. The heat generated by the PTC heating component can be transported to the passenger compartment by the heat exchanger to increase the temperature in the passenger compartment. In this case, the first interface of the five-way valve and the second interface of the five-way valve can be controlled to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve can be controlled to be connected, the second interface of the six-way valve and the third interface of the six-way valve can be controlled to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve can be controlled to be connected. The heat generated by the PTC heating component is transported to the heat exchanger by the first water pump, and the heat generated by the motor is not subjected to heat dissipation treatment.

[0023] In combination with the fourth possible implementation method of the first aspect, in a ninth possible implementation method of the first aspect, when the ambient temperature obtained by the control subsystem belongs to a preset third temperature range, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve to be connected, the second interface of the six-way valve and the fourth interface of the six-way valve to be connected, and the third interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0024] When the ambient temperature is within the third temperature range, the motor needs to be cooled, the battery is within the optimal operating temperature range, and the passenger compartment needs to be heated. The third temperature range may include a temperature range of -5 degrees Celsius to 5 degrees Celsius. At this time, the first interface of the five-way valve and the second interface of the five-way valve can be controlled to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve can be controlled to be connected, the second interface of the six-way valve and the fourth interface of the six-way valve can be controlled to be connected, and the third interface of the six-way valve and the fifth interface of the six-way valve can be controlled to be connected. The heat generated by the PTC heating component and the motor can be exchanged through the heat exchanger to transfer the heat to the passenger compartment. After the heat is dissipated by the radiator, the coolant flows back to the motor to achieve cooling of the motor.

[0025] In combination with any one of the first aspect to the third possible implementation manner of the first aspect, in the tenth possible implementation manner of the first aspect, the control subsystem is also used to receive a cooling instruction or a heating instruction, and control the opening and closing of each interface of the five-way valve and the six-way valve according to the cooling instruction or the cooling instruction.

[0026] In a possible implementation, a control command of the system may also be received, and heating or cooling of the battery, motor and passenger compartment may be implemented according to the control command of the system to meet different personalized user needs. Among them, the heating command may include heating the battery, heating the motor, and heating the passenger compartment. The cooling command may include cooling the motor, cooling the battery, and cooling the passenger compartment.

[0027] In combination with the tenth possible implementation manner of the first aspect, in the eleventh possible implementation manner of the first aspect, when the control subsystem receives a refrigeration command, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0028] When cooling is performed according to the cooling instruction, the PTC heating component, the battery cooling component, the first water pump and the heat exchanger form a loop, in which the heat generated by the battery is exchanged at the battery cooling component, transferred to the coolant, and then delivered to the heat exchanger through the delivery pressure of the first water pump. The heat exchanger absorbs the heat generated by the battery and reduces the battery temperature. In the loop composed of the water-cooled condenser, the warm core, the second water pump, the motor cooling component and the radiator, the heat dissipation of the radiator can reduce the temperature of the motor and the passenger compartment.

[0029] In combination with the tenth possible implementation manner of the first aspect, in the twelfth possible implementation manner of the first aspect, when the control subsystem receives a heating command, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0030] When the heating command is received, the battery, motor, and passenger compartment need to be heated. At this time, through the interface control of the control subsystem, the PTC heating component, the battery cooling component, the first water pump, and the heat exchanger form a loop, in which the heat exchanger can be used to absorb the heat generated by the battery to cool the battery. In the loop composed of the motor cooling component, the water-cooled condenser, the warm core, the second water pump, and the radiator, the passenger compartment and the motor can be cooled by the heat dissipation treatment of the radiator.

[0031] In combination with any one of the first aspect to the eleventh possible implementation of the first aspect, in the thirteenth possible implementation of the first aspect, the thermal management system includes a refrigerant subsystem, which is used to transfer heat in the heat exchanger to the water-cooled condenser.

[0032] When the heat exchanger transfers heat to the water-cooled condenser, a refrigerant subsystem can be set up to exchange heat through the refrigerant in the heat exchanger subsystem, exchange the heat in the heat exchanger to the refrigerant circuit, and transfer the heat to the water-cooled condenser through the refrigerant circuit for heat exchange, thereby increasing the temperature of the coolant in the coolant pipeline in the water-cooled condenser, and the coolant transfers the heat to the heater core, which dissipates the heat and increases the temperature of the passenger compartment.

[0033] In combination with the thirteenth possible implementation of the first aspect, in the fourteenth possible implementation of the first aspect, the refrigerant subsystem includes a compressor, a first expansion valve, the water-cooled condenser, the heat exchanger and a liquid storage tank, and the output end of the compressor is connected to the input end of the compressor via the refrigerant pipeline of the water-cooled condenser, the liquid storage tank, the first expansion valve and the refrigerant pipeline of the heat exchanger.

[0034] The refrigerant circuit includes a compressor, a first expansion valve, a refrigerant pipeline of the water-cooled condenser, and a refrigerant management and liquid storage tank of the heat exchanger. The refrigerant can transfer the heat obtained in the heat exchanger to the water-cooled condenser, and heat exchange occurs between the coolant pipeline and the refrigerant pipeline in the water-cooled condenser, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser. The heat is transferred to the warm core through the pressure of the third water pump or the second water pump to heat the warm core.

[0035] In combination with the fourteenth possible implementation of the first aspect, in the fifteenth possible implementation of the first aspect, the refrigerant subsystem also includes a second expansion valve and an evaporator, and the liquid storage tank is connected to the input end of the compressor via the second expansion valve and the evaporator.

[0036] By setting up a second refrigerant circuit, the heat in the air can be absorbed by the evaporator, and after being compressed by the compressor, the high-temperature refrigerant is transported to the refrigerant pipe of the water-cooled condenser. Through heat exchange, the temperature of the coolant at the water-cooled condenser is increased, and through the pressure of the third water pump or the second water pump, the heat is transported to the heater core to heat the heater core.

[0037] In a second aspect, an embodiment of the present application provides a vehicle, comprising a thermal management system of the electric vehicle as described in any one of the first aspects.

[0038] In a third aspect, an embodiment of the present application provides a thermal management method for an electric vehicle, which is applied to the thermal management system of the electric vehicle described in the first aspect, and the method includes: obtaining operating status information and / or ambient temperature information of the electric vehicle; and controlling the opening and closing of each interface of the five-way valve and the six-way valve according to the operating status information and / or ambient temperature, including:

[0039] When the ambient temperature obtained by the control subsystem falls within the preset first temperature range, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fifth interface of the five-way valve to be connected, the third interface of the six-way valve and the fifth interface of the six-way valve to be connected, and the first interface of the six-way valve and the fourth interface of the six-way valve to be connected.

[0040] When the operating status information acquired by the control subsystem includes that the driving time is greater than the first predetermined time, and the acquired ambient temperature is less than the first predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0041] When the ambient temperature obtained by the control subsystem is lower than the second predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0042] When the operating status information obtained by the control subsystem includes the vehicle cold start status and the obtained ambient temperature is less than the preset third predetermined temperature, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0043] When the ambient temperature obtained by the control subsystem falls within the preset third temperature range, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve to be connected, the second interface of the six-way valve and the fourth interface of the six-way valve to be connected, and the third interface of the six-way valve and the fifth interface of the six-way valve to be connected.

[0044] A fourth aspect of an embodiment of the present application provides a car, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in any one of the third aspects when executing the computer program.

[0045] A fifth aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in any one of the first aspects are implemented.

[0046] The effects of the second to fifth aspects of the embodiments of the present application can refer to the description of the effects of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 is a schematic diagram of a coolant control circuit provided in an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0050] Figure 3 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0051] Figure 4 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0052] Figure 5 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0053] Figure 6 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0054] Figure 7 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0055] Figure 8 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0056] Fig. 9 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0057] Fig.10 is a schematic diagram of another coolant control circuit provided in an embodiment of the present application;

[0058] Fig.11 Schematic diagram of a thermal management device for an electric vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0060] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0061] In recent years, with the development of new energy related technologies, the endurance and safety of electric vehicles have also been effectively improved. Moreover, because electric vehicles can effectively reduce exhaust emissions, reduce traditional energy consumption, improve travel efficiency, reduce travel costs and improve the intelligence of transportation, the market recognition of electric vehicles is getting higher and higher, which has brought great convenience to people's travel.

[0062] The main performance indicators of electric vehicles include parameters such as cruising range. In electric vehicles with batteries of the same capacity, if the vehicle can be thermally managed scientifically and effectively, the battery utilization efficiency can be greatly improved, the vehicle's cruising range can be increased, the comfort of use can be increased, and the reliability of the vehicle can be improved. Therefore, the thermal management system of electric vehicles is particularly important to the performance of electric vehicles. At present, when a thermal management system is used to perform thermal management on the motor, battery, and passenger compartment of an electric vehicle, more valve bodies are required in the coolant circuit, such as a three-way valve with a higher cost, which is not conducive to reducing the system cost. In addition, when refilling, it is easy to have difficulty in refilling, difficulty in exhausting, or crossflow at the refilling port, and the application scenario of the thermal management system is relatively single, and it cannot effectively adapt to the application needs of various scenarios.

[0063] Based on this, an embodiment of the present application proposes a thermal management system for an electric vehicle, which includes a coolant subsystem. The coolant subsystem includes a five-way valve, a six-way valve, a PTC heating component, a battery cooling component, a motor cooling component, a radiator, a heat exchanger, a water-cooled condenser, a warm core, a one-way valve, and a water pump. The interfaces of the six-way valve are respectively connected to the motor cooling component, the battery cooling component, the heat exchanger, the water-cooled condenser, and the first water pump, and the interfaces of the five-way valve are respectively connected to the PTC heating component, the motor cooling component, the heat exchanger, the radiator, and the second water pump. By switching the positions of the interfaces of the five-way valve and the six-way valve, the on-off between the interfaces is controlled to form multiple different circuits of the coolant subsystem.

[0064] like Figure 1The figure shows a schematic diagram of the connection structure of a coolant subsystem provided in an embodiment of the present application. The thermal management system includes a coolant subsystem, and the coolant subsystem includes a five-way valve 101, a six-way valve 102, a PTC (Positive Temperature Coefficient in English, Positive Temperature Coefficient in Chinese) heating component 103, a battery cooling component 104, a motor cooling component 105, a radiator 106, a heat exchanger 107, a water-cooled condenser 108, a warm core 109, a one-way valve 110, and a water pump, wherein the water pump includes a first water pump 1110, a second water pump 1111, and a third water pump 1112; wherein the output end of the battery cooling component 104 is connected to the input end of the PTC heating component 103 through the first water pump 1110, and the battery cooling component 104 The input end of the battery cooling assembly 104 is connected to the first interface 1021 of the six-way valve 102, the output end of the battery cooling assembly 104 is connected to the second interface 1022 of the six-way valve 102, the output end of the PTC heating assembly 103 is connected to the first interface 1011 of the five-way valve 101, and the input end of the first water pump 1110 is connected to the output end of the battery cooling assembly 104; the second interface 1012 of the five-way valve 101 is connected to the third interface 1023 of the six-way valve 102 through the heat exchanger 107; the five-way The third interface 1013 of the valve 101 is connected to the fourth interface 1024 of the six-way valve 102 through the motor cooling component 105; the fifth interface 1025 of the six-way valve 102 is connected to the fourth interface 1014 of the five-way valve 101 through the second water pump 1111, and the input end of the second water pump 1111 is connected to the fifth interface 1025 of the six-way valve 102; the fourth interface 1014 of the five-way valve 101 is connected to the fifth interface 1015 of the five-way valve 101 through the radiator 106; the second water pump 1111 is connected to the fifth interface 1015 of the five-way valve 101 through the radiator 106; the The output end of 111 is connected to the fourth interface 1014 of the five-way valve 101; the fifth interface 1025 of the six-way valve 102 is connected to the sixth interface 1026 of the six-way valve 102 through the third water pump 1112 and the one-way valve 110 in sequence, and the fifth interface 1025 of the six-way valve 102 is connected to the sixth interface 1026 of the six-way valve 102 through the warm core 109 and the water-cooled condenser 108 in sequence, and the input end of the third water pump 1112 is connected to the input end of the second water pump 1111.

[0065] The battery cooling assembly 104 may include a coolant pipe assembly provided at the battery, and the motor cooling assembly 105 may include a coolant pipe assembly provided at the motor. By conveying coolants of different temperatures in the battery cooling assembly 104, the battery may be cooled or heated. By conveying coolants of different temperatures in the motor cooling assembly 105, the motor may be cooled or heated.

[0066] The direction of the one-way valve 110 is the same as the action direction of the third water pump 1112. That is, the output end of the third water pump 1112 is connected to the positive input end of the one-way valve 110. The coolant can be pumped into the one-way valve 110 through the third water pump 1112.

[0067] The interfaces of the five-way valve 101 and the six-way valve 102 are connected to the battery cooling assembly 104, the PTC (Positive Temperature Coefficient) heating assembly, the motor cooling assembly, the radiator 106, and the heat exchanger 107. The heat is transported by the coolant driven by the water pump by selecting and switching the interface connection mode of the five-way valve 101 and the six-way valve 102. When the temperature of the battery and / or the motor is high, the heat generated by the battery and / or the motor can be transported to the heat exchanger 107, and the heat is absorbed by the heat exchanger 107; or, the heat generated by the motor and / or the battery can be dissipated to the environment through the radiator 106. When the temperature of the motor and / or the battery is low, heat can be generated by the PTC heating assembly 103, and the heat can be transported to the battery and / or the motor through the coolant to improve the efficiency, stability and reliability of the motor and / or the battery. In addition, the five-way valve 101 and the six-way valve 102 are connected according to the above-mentioned connection relationship through the interfaces. By selecting and switching the working positions of the five-way valve 101 and the six-way valve 102, the heat transfer for cooling or heat dissipation can be effectively realized, and the number of valve body components can be effectively reduced. For example, the use of more expensive three-way valves can be reduced, which is beneficial to reducing system costs.

[0068] In order to improve the efficiency of the thermal management system to replenish the fluid and improve the efficiency of exhausting the coolant, such as Figure 2 As shown, the thermal management system in the embodiment of the present application includes a first liquid replenishment port (such as Figure 2 point E in the middle) and the second fluid inlet (such as Figure 2 Point F in the figure). Wherein, the first refill port is provided with an input end of the second water pump 1111 and an input end of the third water pump 1112. The coolant replenished through the first refill port can be directly pumped in and used by the second water pump 1111 and the third water pump 1112, so that the refilling needs of the two water pumps can be completed through one refill port, and the refilling structure is simpler and the refilling effect is better. The second refill port is located at the input end of the first water pump 1110, and can be used to meet the coolant refilling needs of the first water pump 1110. Refilling through the two refill ports can also effectively improve the bubble discharge efficiency. When the kettle 112 filled with coolant is used to replenish the coolant for the first refill port and the second refill port, the risk of crossflow through the kettle 112 during refilling can be effectively reduced.

[0069] In an embodiment of the present application, the thermal management system of the electric vehicle may include a control subsystem, which may acquire control variables. The control variables may include ambient temperature and / or operating status information of the electric vehicle. According to the acquired control variables, the control subsystem may control the opening and closing states of each interface in the five-way valve 101 and the six-way valve 102 to achieve conduction and disconnection between different interfaces. For example, the heat of the PTC (Positive Temperature Coefficient in English, positive temperature coefficient in Chinese) heating component input by the first interface 1011 of the five-way valve 101, and / or the heat of the battery, can be selected to connect the second interface 1012 of the five-way valve 101 to transfer the heat to the water-cooled condenser 108 to achieve heating of the passenger compartment; the third interface 1013 of the five-way valve 101 may be selected to connect to transfer the motor heat and the battery heat to the passenger compartment.

[0070] like Figure 3 FIG. 1 is a schematic diagram of a cooling liquid control circuit provided by an embodiment of the present application. When it is detected that the ambient temperature belongs to a preset first temperature range, the cooling liquid control circuit can be controlled according to Figure 3 The interface connection mode shown obtains heat from the environment to heat the passenger compartment, and the battery temperature is increased through the PTC heating component 103 and the motor temperature, so that the battery performance is improved. The first temperature range may include a temperature range where the battery performance is not in the best state, for example, the first temperature range may be a temperature range of 5-10 degrees Celsius.

[0071] like Figure 3 In the coolant circuit schematic diagram shown, the first interface 1011 of the five-way valve 101 and the third interface 1013 of the five-way valve 101 are connected, the second interface 1012 of the five-way valve 101 and the fifth interface 1015 of the five-way valve 101 are connected, the third interface 1023 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 are connected, and the first interface 1021 of the six-way valve 102 and the fourth interface 1024 of the six-way valve 102 are connected.

[0072] Under this control condition, the coolant control circuit includes three circuits. In the circuit formed by the PTC component, the motor cooling component 105, the first water pump 1110 and the battery cooling component 104, the heat generated by the motor is transferred to the motor cooling component 105 through heat exchange, and the heat generated by the PTC heating component 103 and the motor is pumped to the battery cooling component 104 through the conveying force generated by the first water pump 1110. The battery temperature is increased through heat exchange, thereby increasing the temperature of the battery relative to the environment, so that the battery performance is improved.

[0073] In the coolant circuit formed by the radiator 106, the heat exchanger 107 and the second water pump 1111, the radiator 106 can absorb heat from the air through heat exchange, and pump the heat to the heat exchanger 107 through the second water pump 1111, thereby transferring the heat absorbed from the air to the passenger compartment, thereby increasing the temperature of the passenger compartment at the ambient temperature, thereby improving the comfort of the passengers; in addition, a heat pump circuit / refrigerant circuit is arranged between the heat exchanger 107 and the passenger compartment, and the heat pump circuit absorbs heat from the heat exchanger 107 and transfers the heat to the passenger compartment.

[0074] In the cooling circuit formed by the water-cooled condenser 108, the heater core 109, the third water pump 1112 and the one-way valve 110, the water-cooled condenser 108 can absorb the heat released by the heat exchanger 107, for example, transmit the heat released by the heat exchanger 107 through the refrigerant circuit, pump the heat to the heater core 109 through the third water pump 1112, and exchange heat with the passenger compartment environment through the heater core 109 to increase the ambient temperature in the passenger compartment.

[0075] like Figure 4 FIG. 2 is another schematic diagram of a cooling liquid control circuit provided in an embodiment of the present application. Figure 4 As shown, when the running status information of the electric vehicle includes a running time greater than the first predetermined time, such as a running time greater than half an hour, the temperature of the battery and the motor of the vehicle is high, but the temperature of the passenger compartment at this time is lower than the comfort temperature required by the user, or lower than the passenger compartment temperature set by the user. For example, the passenger compartment temperature required by the user is 25 degrees, and at this time, the ambient temperature is lower than the set temperature. For example, when the ambient temperature is any temperature between 10-20 degrees Celsius, the passenger compartment needs to be heated, and the heat generated by the battery and the motor can be transferred to the warm core 109, thereby improving the comfort of the passengers and improving the energy efficiency.

[0076] like Figure 4 In the coolant control circuit shown, the first interface 1011 of the five-way valve 101 and the third interface 1013 of the five-way valve 101 are connected, the second interface 1012 of the five-way valve 101 and the fourth interface 1024 of the five-way valve 101 are connected, the first interface 1021 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 are connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 are connected.

[0077] Under this control condition, the coolant control circuit includes two circuits. Among them, the first circuit includes the motor cooling component 105, the PTC heating component, the first water pump 1110, the battery cooling component 104, the heat exchanger 107, and the second water pump 1111. Among them, the heat generated by the battery cooling component 104, the motor cooling component 105 and the PTC heating component can be transported to the heat exchanger 107 through the coolant through the pumping pressure provided by the first water pump 1110 and the second water pump 1111. Through the heat exchange treatment of the heat exchanger 107, the heat can be transported to the water-cooled condenser 108 with the help of heat transfer circuits such as the refrigerant circuit. At this time, in the case of excess heat, the excess heat is dissipated through the radiator 106.

[0078] The second circuit includes a water-cooled condenser 108, a heater core 109, a one-way valve 110 and a third water pump 1112. Through heat exchange, the water-cooled condenser 108 can absorb the heat provided by the heat exchanger 107, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser 108. The heated coolant is pumped to the heater core 109 through the third water pump 1112. Through the heat exchange of the heater core 109, the heat is exchanged to the passenger compartment to increase the temperature of the passenger compartment.

[0079] Figure 5 A schematic diagram of another coolant control circuit provided for an embodiment of the present application. When the ambient temperature is further reduced to less than the second predetermined temperature, the second predetermined temperature is less than the lowest temperature in the first temperature range, for example, the ambient temperature is less than -10 degrees Celsius, including -15 degrees Celsius, -20 degrees Celsius, etc. In this case, the ambient temperature is a temperature at which the motor can work effectively, for example, the working reliability of the motor meets the preset requirements. The heat generated by the motor can be combined with the heat generated by the PTC heating component to provide thermal energy for the passenger compartment.

[0080] like Figure 5 As shown, the first interface 1011 of the five-way valve 101 is connected to the third interface 1013 of the five-way valve 101, the second interface 1012 of the five-way valve 101 is connected to the fourth interface 1014 of the five-way valve 101, the second interface 1022 of the six-way valve 102 is connected to the third interface 1023 of the six-way valve 102, and the fourth interface 1024 of the six-way valve 102 is connected to the fifth interface 1025 of the six-way valve 102.

[0081] Under this control condition, the coolant control circuit includes two circuits. Among them, the first circuit includes the motor cooling component 105, the PTC heating component, the first water pump 1110, the heat exchanger 107, and the second water pump 1111. The heat generated by the motor cooling component 105 and the PTC heating component can be transported to the heat exchanger 107 through the coolant through the pumping pressure provided by the first water pump 1110 and the second water pump 1111. Through the heat exchange treatment of the heat exchanger 107, the heat can be transported to the water-cooled condenser 108 with the help of heat transfer circuits such as the refrigerant circuit. At this time, the heat generated by the battery is not connected to the circuit, and can be used to increase the temperature of the battery itself, or connected to other heating components to improve the battery performance.

[0082] The second circuit includes a water-cooled condenser 108, a heater core 109, a one-way valve 110 and a third water pump 1112. Through heat exchange, the water-cooled condenser 108 can absorb the heat provided by the heat exchanger 107, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser 108. The heated coolant is pumped to the heater core 109 through the third water pump 1112. Through the heat exchange of the heater core 109, the heat is exchanged to the passenger compartment to increase the temperature of the passenger compartment.

[0083] Figure 6 A schematic diagram of another coolant control circuit provided in an embodiment of the present application. Figure 6 As shown, when the running state of the electric vehicle is a cold start state, and the ambient temperature is lower than the predetermined normal operating temperature of the motor. For example, the ambient temperature is any temperature lower than -15 degrees Celsius. In this case, the motor needs to store heat to improve the motor performance. Since the temperature in the passenger compartment is relatively low, it is necessary to quickly increase the temperature in the passenger compartment. At this time, the heat generated by the PTC heating component 103 can be first transferred to the passenger compartment to increase the temperature of the passenger compartment.

[0084] like Figure 6 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fourth interface 1014 of the five-way valve 101 to be connected, the second interface 1022 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0085] Under this control condition, the coolant control circuit includes three circuits. The first circuit includes a heat exchanger 107, a PTC heating component 103 and a first water pump 1110. The heat generated by the PTC heating component 103 is pumped to the heat exchanger 107 by the first water pump 1110, and then transported to the water-cooled condenser 108 by the heat exchanger 107 to quickly increase the temperature of the passenger compartment.

[0086] The second circuit includes a motor cooling assembly 105 and a second water pump 1111. At this time, the heat of the motor cooling assembly 105 is not transferred to other heat absorbing components, so that the motor can accumulate the generated heat, so that the motor gradually enters a better operating environment, thereby improving the motor operating performance.

[0087] The third circuit includes a water-cooled condenser 108, a heater core 109, a one-way valve 110 and a third water pump 1112. Through heat exchange, the water-cooled condenser 108 can absorb the heat provided by the heat exchanger 107, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser 108. The heated coolant is pumped to the heater core 109 through the third water pump 1112. Through the heat exchange of the heater core 109, the heat is exchanged to the passenger compartment to increase the temperature of the passenger compartment.

[0088] Figure 7 A schematic diagram of another coolant control circuit provided in an embodiment of the present application. Figure 7 As shown, when the ambient temperature of the electric vehicle is in the third temperature range, the temperature in the third temperature range is greater than the second predetermined temperature, and the motor can work normally and effectively. For example, the ambient temperature can be any temperature in the range of -5 to 5 degrees Celsius. In this case, the motor and the PTC heating component can provide heat for the passenger compartment.

[0089] like Figure 7 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fifth interface 1015 of the five-way valve 101 to be connected, the second interface 1022 of the six-way valve 102 and the fourth interface 1024 of the six-way valve 102 to be connected, and the third interface 1023 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0090] Under this control condition, the coolant control circuit includes two circuits. The first circuit includes a heat exchanger 107, a radiator 106, a PTC heating assembly 103, a first water pump 1110, and a motor cooling assembly 105. The heat generated by the PTC heating assembly 103 and the heat collected by the motor cooling assembly 105 are pumped to the heat exchanger 107 and the radiator 106 by the first water pump 1110, and then transported to the water-cooled condenser 108 by the heat exchanger 107 to quickly increase the temperature of the passenger compartment, and the radiator 106 dissipates the excess heat.

[0091] The second circuit includes a water-cooled condenser 108, a heater core 109, a one-way valve 110 and a third water pump 1112. Through heat exchange, the water-cooled condenser 108 can absorb the heat provided by the heat exchanger 107, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser 108. The heated coolant is pumped to the heater core 109 through the third water pump 1112. Through the heat exchange of the heater core 109, the heat is exchanged to the passenger compartment to increase the temperature of the passenger compartment.

[0092] In a possible implementation, the embodiment of the present application can also control the position of the five-way valve 101 and the six-way valve 102 by the control subsystem according to the received control instructions to realize different functions corresponding to different control instructions.

[0093] For example, the control instructions may include heating instructions and cooling instructions. The heating instructions may include heating the battery, heating the motor, and heating the passenger compartment. The cooling instructions may include cooling the motor, cooling the battery, and cooling the passenger compartment.

[0094] like Figure 8 As shown, the control instruction is a refrigeration instruction. When the control subsystem receives the refrigeration instruction, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fifth interface 1015 of the five-way valve 101 to be connected, the first interface 1021 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the sixth interface 1026 of the six-way valve 102 to be connected.

[0095] Under this control instruction, the coolant control circuit includes two circuits. The first circuit includes a heat exchanger 107, a PTC heating component 103, a first water pump 1110 and a battery cooling component 104. When the battery needs to be cooled, the heat exchanger 107 can absorb heat to reduce the temperature of the battery.

[0096] The second circuit includes a motor cooling assembly 105, a radiator 106, a second water pump 1111, a heater core 109, and a water-cooled condenser 108. The heat of the water-cooled condenser 108 and the motor cooling assembly 105 can be dissipated through the radiator 106, thereby reducing the temperature of the interior cabin and the temperature of the motor. At this time, at the one-way valve 110 circuit, the flow direction of the coolant is opposite to that of the third water pump 1112 and the one-way valve 110. The coolant cannot flow through the one-way valve 110 in the reverse direction, and the coolant will flow to the water-cooled condenser 108 and the heater core 109, thereby meeting the requirement for cooling the passenger compartment.

[0097] Fig. 9 A schematic diagram of another coolant control circuit provided in an embodiment of the present application. Fig. 9 As shown, when the control instruction is a heating instruction, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fourth interface 1014 of the five-way valve 101 to be connected, the first interface 1021 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0098] Under the control of the control instruction, the coolant control loop includes three loops. The first loop includes the PTC heating component 103, the battery cooling component 104, the first water pump 1110 and the heat exchanger 107. The heat of the PTC heating component can be pumped to the heat exchanger 107 by the first water pump 1110, and the heat can be transported to the third loop through the heat exchange process of the heat exchanger 107.

[0099] The second loop includes the motor cooling assembly 105 and the second water pump 1111. At this time, the coolant in the motor cooling assembly 105 is in a self-circulating state.

[0100] The third circuit includes a water-cooled condenser 108, a heater core 109, a one-way valve 110 and a third water pump 1112. Through heat exchange, the water-cooled condenser 108 can absorb the heat provided by the heat exchanger 107, thereby increasing the temperature of the coolant in the coolant pipeline of the water-cooled condenser 108. The heated coolant is pumped to the heater core 109 through the third water pump 1112. Through the heat exchange of the heater core 109, the heat is exchanged to the passenger compartment to increase the temperature of the passenger compartment.

[0101] In the embodiment of the present application, the thermal management system of the electric vehicle may further include a refrigerant subsystem, such as Fig.10 As shown, the refrigerant subsystem can transfer the heat absorbed by the heat exchanger 107 to the water-cooled condenser 108, thereby achieving heat transfer.

[0102] like Fig.10 As shown, the refrigerant subsystem may include two circuits. Among them, the first circuit of the refrigerant subsystem may include a compressor 113, a water-cooled condenser 108, a liquid storage tank 114, a first expansion valve 115 and a heat exchanger 107. The refrigerant can transfer the heat obtained in the heat exchanger 107 to the water-cooled condenser 108, and heat exchange occurs between the coolant pipe and the refrigerant pipe in the water-cooled condenser 108, thereby increasing the temperature of the coolant in the coolant pipe of the water-cooled condenser 108, and the heat is transferred to the warm core 109 through the pressure of the third water pump 1112 or the second water pump 1111, so as to heat the warm core 109.

[0103] The second circuit of the refrigerant subsystem includes a second expansion valve 116, a water-cooled condenser 108, a liquid storage tank 114, a compressor 113, and an evaporator 117. By setting up the second refrigerant circuit, the heat in the air can be absorbed by the evaporator 117, and after being compressed by the compressor 113, the high-temperature refrigerant is transported to the refrigerant pipeline of the water-cooled condenser 108. Through heat exchange, the temperature of the coolant at the water-cooled condenser 108 is increased, and the heat is transported to the warm core 109 through the pressure of the third water pump 1112 or the second water pump 1111 to heat the warm core 109.

[0104] In addition, the embodiment of the present application further provides a thermal management method for an electric vehicle, which is applied to the thermal management system of the electric vehicle described in the first aspect, and the method comprises: obtaining the operating status information and / or the ambient temperature information of the electric vehicle; according to the operating status information and / or the ambient temperature, controlling the position of the five-way valve 101 and the six-way valve 102, and controlling the opening and closing and the connection status of each interface, including:

[0105] When the ambient temperature acquired by the control subsystem belongs to the preset first temperature range, the positions of the five-way valve 101 and the six-way valve 102 are as follows: Figure 3 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the third interface 1013 of the five-way valve 101 to be connected, the second interface 1012 of the five-way valve 101 and the fifth interface 1015 of the five-way valve 101 to be connected, the third interface 1023 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected, and the first interface 1021 of the six-way valve 102 and the fourth interface 1024 of the six-way valve 102 to be connected.

[0106] When the operating status information acquired by the control subsystem includes that the driving time is greater than the first predetermined time, and the acquired ambient temperature is less than the first predetermined temperature, the positions of the five-way valve 101 and the six-way valve 102 are as follows: Figure 4As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the third interface 1013 of the five-way valve 101 to be connected, the second interface 1012 of the five-way valve 101 and the fourth interface 1014 of the five-way valve 101 to be connected, the first interface 1021 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0107] When the ambient temperature acquired by the control subsystem is lower than the second predetermined temperature, the positions of the five-way valve 101 and the six-way valve 102 are as follows: Figure 5 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the third interface 1013 of the five-way valve 101 to be connected, the second interface 1012 of the five-way valve 101 and the fourth interface 1014 of the five-way valve 101 to be connected, the second interface 1022 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0108] When the operating status information acquired by the control subsystem includes the vehicle cold start status and the acquired ambient temperature is less than the preset third predetermined temperature, the positions of the five-way valve 101 and the six-way valve 102 are as follows: Figure 6 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fourth interface 1014 of the five-way valve 101 to be connected, the second interface 1022 of the six-way valve 102 and the third interface 1023 of the six-way valve 102 to be connected, and the fourth interface 1024 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0109] When the ambient temperature acquired by the control subsystem belongs to the preset third temperature range, the positions of the five-way valve 101 and the six-way valve 102 are as follows: Figure 7 As shown, the control subsystem controls the first interface 1011 of the five-way valve 101 and the second interface 1012 of the five-way valve 101 to be connected, the third interface 1013 of the five-way valve 101 and the fifth interface 1015 of the five-way valve 101 to be connected, the second interface 1022 of the six-way valve 102 and the fourth interface 1024 of the six-way valve 102 to be connected, and the third interface 1023 of the six-way valve 102 and the fifth interface 1025 of the six-way valve 102 to be connected.

[0110] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0111] The present application embodiment provides an electric vehicle, which includes Figures 1 to 10 A thermal management system for an electric vehicle as described in any one of the preceding claims.

[0112] Fig.11 Schematic diagram of a thermal management device for an electric vehicle provided by an embodiment of the present application. Fig.11 As shown, the thermal management device 21 of the electric vehicle of this embodiment includes: a processor 210, a memory 211, and a computer program 212 stored in the memory 211 and executable on the processor 210, such as a thermal management program for the electric vehicle. When the processor 210 executes the computer program 212, the steps in the above-mentioned thermal management method embodiments of the electric vehicle are implemented. Alternatively, when the processor 210 executes the computer program 212, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0113] Exemplarily, the computer program 212 may be divided into one or more modules / units, which are stored in the memory 211 and executed by the processor 210 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 212 in the thermal management device 21 of the electric vehicle.

[0114] The thermal management device of the electric vehicle may include, but is not limited to, a processor 210 and a memory 211. Those skilled in the art will appreciate that Fig.11 This is only an example of the thermal management device 21 of an electric vehicle and does not constitute a limitation of the thermal management device 21 of the electric vehicle. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the thermal management device of the electric vehicle may also include input and output devices, network access devices, buses, etc.

[0115] The processor 210 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0116] The memory 211 may be an internal storage unit of the thermal management device 21 of the electric vehicle, such as a hard disk or memory of the thermal management device 21 of the electric vehicle. The memory 211 may also be an external storage device of the thermal management device 21 of the electric vehicle, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the thermal management device 21 of the electric vehicle. Further, the memory 211 may also include both an internal storage unit and an external storage device of the thermal management device 21 of the electric vehicle. The memory 211 is used to store the computer program and other programs and data required by the thermal management device of the electric vehicle. The memory 211 may also be used to temporarily store data that has been output or is to be output.

[0117] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0118] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0119] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0120] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0121] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0122] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0123] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by hardware related to computer program instructions. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0124] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A thermal management system for an electric vehicle, characterized in that: The thermal management system includes a coolant subsystem, which includes a five-way valve, a six-way valve, a PTC heating component, a battery cooling component, a motor cooling component, a radiator, a heat exchanger, a water-cooled condenser, a warm core, a one-way valve, and a water pump. The six-way valve is connected to the motor cooling component, the battery cooling component, the heat exchanger, the water-cooled condenser, and the water pump. The five-way valve is connected to the PTC heating component, the motor cooling component, the heat exchanger, the radiator, and the water pump. By switching the positions of the five-way valve and the six-way valve, multiple different circuits of the coolant subsystem are formed.

2. The system according to claim 1, characterized in that The water pumps include a first water pump, a second water pump and a third water pump; The output end of the battery cooling assembly is connected to the input end of the PTC heating assembly through the first water pump, the input end of the battery cooling assembly is connected to the first interface of the six-way valve, the output end of the battery cooling assembly is connected to the second interface of the six-way valve, the output end of the PTC heating assembly is connected to the first interface of the five-way valve, and the input end of the first water pump is connected to the output end of the battery cooling assembly; The second interface of the five-way valve is connected to the third interface of the six-way valve through the heat exchanger; The third interface of the five-way valve is connected to the fourth interface of the six-way valve through a motor cooling assembly; The fifth interface of the six-way valve is connected to the fourth interface of the five-way valve through the second water pump, and the input end of the second water pump is connected to the fifth interface of the six-way valve; The fourth interface of the five-way valve is connected to the fifth interface of the five-way valve through a radiator; The fifth interface of the six-way valve is connected to the sixth interface of the six-way valve through the third water pump and the one-way valve in sequence, and the fifth interface of the six-way valve is connected to the sixth interface of the six-way valve through the water-cooled condenser and the warm core in sequence, and the input end of the third water pump is connected to the input end of the second water pump.

3. The system according to claim 2, characterized in that The coolant subsystem further includes a first fluid replenishment port and a second fluid replenishment port, wherein the first fluid replenishment port is used to replenish fluid for the second water pump and the third water pump, and the second fluid replenishment port is used to replenish fluid for the first water pump.

4. The system according to claim 3, characterized in that The first liquid replenishing port is located at a position where the second water pump and the third water pump are connected, and is the input end of the second water pump and the third water pump, and the second liquid replenishing port is located at the input end of the first water pump.

5. The system according to any one of claims 1 to 4, characterized in that: The system also includes a control subsystem, which is used to obtain operating status information and / or ambient temperature information of the electric vehicle, and control the opening and closing of each interface of the five-way valve and the six-way valve according to the operating status information and / or ambient temperature.

6. The system according to claim 5, characterized in that When the ambient temperature obtained by the control subsystem falls within the preset first temperature range, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fifth interface of the five-way valve to be connected, the third interface of the six-way valve and the fifth interface of the six-way valve to be connected, and the first interface of the six-way valve and the fourth interface of the six-way valve to be connected.

7. The system according to claim 5, characterized in that When the operating status information acquired by the control subsystem includes that the driving time is greater than the first predetermined time, and the acquired ambient temperature is less than the first predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

8. The system according to claim 5, characterized in that When the ambient temperature obtained by the control subsystem is lower than the second predetermined temperature, the control subsystem controls the first interface of the five-way valve and the third interface of the five-way valve to be connected, the second interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

9. The system according to claim 5, characterized in that When the operating status information obtained by the control subsystem includes the vehicle cold start status and the obtained ambient temperature is less than the preset third predetermined temperature, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve to be connected, the second interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

10. The system according to claim 5, characterized in that When the ambient temperature obtained by the control subsystem falls within the preset third temperature range, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve to be connected, the second interface of the six-way valve and the fourth interface of the six-way valve to be connected, and the third interface of the six-way valve and the fifth interface of the six-way valve to be connected.

11. The system according to any one of claims 1 to 4, characterized in that: The control subsystem is further used to receive a cooling instruction or a heating instruction, and control the opening and closing of each interface of the five-way valve and the six-way valve according to the cooling instruction or the heating instruction.

12. The system according to claim 11, characterized in that When the control subsystem receives a refrigeration instruction, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fifth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the sixth interface of the six-way valve to be connected.

13. The system according to claim 11, characterized in that When the control subsystem receives a heating instruction, the control subsystem controls the first interface of the five-way valve and the second interface of the five-way valve to be connected, the third interface of the five-way valve and the fourth interface of the five-way valve to be connected, the first interface of the six-way valve and the third interface of the six-way valve to be connected, and the fourth interface of the six-way valve and the fifth interface of the six-way valve to be connected.

14. The system according to any one of claims 1 to 12, characterized in that: The thermal management system includes a refrigerant subsystem for transferring heat in the heat exchanger to the water-cooled condenser.

15. The system according to claim 13, characterized in that The refrigerant subsystem includes a compressor, a first expansion valve, the water-cooled condenser, the heat exchanger and a liquid storage tank. The output end of the compressor is connected to the input end of the compressor via the refrigerant pipeline of the water-cooled condenser, the liquid storage tank, the first expansion valve and the refrigerant pipeline of the heat exchanger.

16. The system according to claim 15, characterized in that The refrigerant subsystem further includes a second expansion valve and an evaporator, and the liquid storage tank is connected to the input end of the compressor via the second expansion valve and the evaporator.

17. An electric vehicle, characterized in that: The electric vehicle comprises the thermal management system according to any one of claims 1-15.

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