Thermal management system and electric device based on multi-way valve

Abstract

The present application provides a thermal management system and electric device based on a multi-way valve, which relates to the technical field of thermal management systems. It includes: a water channel switching mechanism having a first multi-way valve and a second multi-way valve; an electric drive mechanism connected to the first water pump and the seventh interface respectively; a power battery connected to the second water pump and the first interface respectively, and a third water outlet connected between the second water pump and the fourth interface; a battery cooler connected to the eighth interface and the third interface respectively, a radiator connected to the fifth interface and the sixth interface respectively, a heater connected to the third water pump and a heater core respectively, the heater core connected to the first water outlet, and the third water pump connected to the second water outlet. The coupling of the electric drive cooling system, the battery temperature control system and the heater system is completed to achieve reasonable energy flow, and by switching the first multi-way valve and the second multi-way valve, multiple modes can be switched, thereby improving the integration of the thermal management system.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management systems, and in particular to a thermal management system and an electric device based on a multi-way valve. Background Art

[0002] The power batteries of electric vehicles have strict temperature requirements, especially lithium electric vehicles. When the ambient temperature is below 0℃, the internal resistance of the power electric vehicle becomes larger, and there is a problem of low discharge power and inability to charge normally. When the ambient temperature is too high, the chemical reaction inside the power battery intensifies, and there is a risk of abnormal operation or even fire and explosion. When the electric vehicle is traveling fast, the power battery needs to provide a large output power to the drive motor, which often generates heat and causes the power battery temperature to rise. Therefore, the power vehicle is equipped with an electric vehicle thermal management control device. When the temperature of the power electric vehicle is too high, it is cooled; when the temperature of the power electric vehicle is too low, it is heated to more evenly control the temperature range of the power electric vehicle.

[0003] Thermal management is a core technology for pure electric vehicles. The purpose of a complete vehicle thermal management system is to maintain the drive motor, drive motor controller, charger, power battery, and other components within an appropriate temperature range under all operating conditions. If the drive motor is not effectively cooled, its internal temperature will continue to rise, leading to decreased motor efficiency. In severe cases, excessive temperatures can cause coil erosion or even short circuits, damaging the motor. Battery system performance degrades significantly at lower temperatures, making it unable to output sufficient power to drive the motor properly. Therefore, ensuring stable and reliable operation of the battery and motor systems requires a comprehensive and effective vehicle thermal management system. Current electric vehicle thermal management systems utilize separate designs for the battery thermal management system and the electric drive thermal management system. This approach consumes significant space, is costly, and results in low thermal management efficiency and poor energy savings. Summary of the Invention

[0004] The purpose of this application is to provide a thermal management system and electric device based on a multi-way valve, which is conducive to the coupling of the cooling system, battery temperature control system and heat pump system, realizes reasonable energy flow and reduces investment costs.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In the first aspect, the present application provides a thermal management system based on a multi-way valve, comprising: a water path switching mechanism, having a first multi-way valve and a second multi-way valve, the first multi-way valve being provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface, and the second multi-way valve being provided with a first water port, a second water port, and a third water port; an electrically driven cooling system, having a radiator, an electrically driven mechanism, and a first water pump, one end of the radiator being connected to the fifth interface, the other end of the radiator being connected to the sixth interface, one end of the electrically driven mechanism being connected to the first water pump, the other end of the electrically driven mechanism being connected to the seventh interface, and the first water pump being connected to the second interface Connect; A battery temperature control system, comprising a battery cooler, a power battery and a second water pump, one end of the battery cooler is connected to the eighth interface, the other end of the battery cooler is connected to the third interface, one end of the power battery is connected to the second water pump, the other end of the power battery is connected to the first interface, the second water pump is connected to the fourth interface, and the third water outlet is connected to the pipeline between the second water pump and the fourth interface; A warm air system, comprising a heater, a warm air core and a third water pump, one end of the heater is connected to the third water pump, the other end of the heater is connected to the warm air core, the warm air core is connected to the first water outlet, and the third water pump is connected to the second water outlet.

[0007] In the above implementation process, the water path switching mechanism is provided with a first multi-way valve and a second multi-way valve, the electric drive mechanism of the electric drive cooling system is connected to the seventh interface of the first multi-way valve, and its first water pump is connected to the second interface, the power battery of the battery temperature control system is connected to the first interface, and its second water pump is connected to the fourth interface, the battery cooler of the warm air system is connected to the third interface and the eighth interface respectively, the radiator is connected to the fifth interface and the sixth interface respectively, the warm air core is connected to the first water outlet, and the third water pump is connected to the second water outlet, so as to realize the coupling of the electric drive cooling system, the battery temperature control system and the warm air system, realize reasonable energy flow, reduce investment cost, and realize switching of multiple modes through switching of the first multi-way valve and the second multi-way valve, thereby improving the integration of the thermal management system.

[0008] In some embodiments, the heating system further includes a connecting pipe, one end of which is connected to the pipe between the third water pump and the second water outlet, and the other end of which is connected to the pipe between the power battery and the first interface.

[0009] In the above implementation process, the connecting pipe is connected between the power battery and the third water pump, which can connect the heating system and the battery temperature control system, and facilitate the refilling of coolant in the heating system and the battery temperature control system.

[0010] In some embodiments, the electrically driven cooling system further includes a first sensor, one end of which is connected to the second interface, and the other end of which is connected to the first water pump. By setting the first sensor between the second interface and the first water pump, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electrically driven cooling system.

[0011] In some embodiments, the electric drive mechanism includes an electric drive assembly and a charger, one end of the electric drive assembly is connected to the first water pump, the other end of the electric drive assembly is connected to the charger, and the charger is connected to the seventh interface.

[0012] During the above implementation process, the electric drive assembly is connected to the first water pump, and the charger is connected to the seventh interface, so that the waste heat generated during the operation of the electric drive assembly and the charger can be exchanged with the battery cooler through the first multi-way valve, thereby achieving high efficiency of the thermal management system and reducing the energy consumption of the thermal management system.

[0013] In some embodiments, the battery temperature control system also includes a second sensor, one end of the second sensor is connected to the eighth interface, and the other end of the second sensor is connected to the battery cooler. By setting the second sensor between the eighth interface and the battery cooler, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electric drive cooling system.

[0014] In some embodiments, the heating system also includes a third sensor, one end of the third sensor is connected to the second water pump, and the other end of the third sensor is connected to the fourth interface. By setting the third sensor between the fourth interface and the second water pump, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electric drive cooling system.

[0015] In some embodiments, the third water inlet is connected to the pipeline between the third sensor and the fourth interface, which can facilitate adding coolant to the heat pipe system, wherein a portion of the coolant enters the second multi-way valve, and a portion of the coolant in the second multi-way valve enters the second water pump and the third water pump respectively through the third water inlet, thereby pumping the coolant and avoiding the situation where the coolant is not fully filled.

[0016] In some embodiments, the second multi-way valve includes a fourth water port and a fifth water port, the fourth water port is connected to the pipeline between the first water pump and the second interface, and the fifth water port is connected to the pipeline between the third water pump and the second water port.

[0017] In the above-mentioned implementation process, by setting the fourth water inlet and the fifth water inlet on the second multi-way valve, the flow ratio of the first water inlet, the second water inlet and the third water inlet can be adjusted, and the full-pass mode of the first water inlet, the second water inlet, the third water inlet, the fourth water inlet and the fifth water inlet can be realized, which can facilitate the cooling liquid filling of the thermal management system, improve the integration and reduce the investment in production costs.

[0018] In some embodiments, the multi-way valve-based thermal management system also includes an expansion water tank, one end of which is connected to the pipeline between the second interface and the first water pump, and the other end of which is connected to the pipeline between the radiator and the fifth interface.

[0019] In the above implementation process, by connecting the expansion water tank to the pipeline between the second interface and the first water pump, and connecting the power battery and the third water pump with a connecting pipeline, the first water pump, the second water pump and the third water pump can be filled with coolant, and the expansion water tank can also store coolant, accommodate air overflowing from the thermal management system and adjust the maximum pressure of the thermal management system.

[0020] In a second aspect, the present application further provides an electric device, comprising a thermal management system based on a multi-way valve as described in any one of the above items.

[0021] The electric vehicle provided in the second embodiment of the present application includes the thermal management system based on the multi-way valve described in the technical solution of the first aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.

[0022] Other features and advantages of the present application will be described in the following description and, in part, will become apparent from the description or be understood by practicing the embodiments of the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technical users in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the connectivity of a first mode of a thermal management system based on a multi-way valve disclosed in an embodiment of the present application.

[0025] Figure 2 This is a schematic diagram of the connection of the second mode of a thermal management system based on a multi-way valve disclosed in an embodiment of the present application.

[0026] Figure 3 This is a schematic diagram of the connection of the third mode of a thermal management system based on a multi-way valve disclosed in an embodiment of the present application.

[0027] Figure 4 This is a schematic diagram of the connectivity of the fourth mode of a thermal management system based on a multi-way valve disclosed in an embodiment of the present application.

[0028] Figure 5 This is a schematic diagram of the connectivity of the fifth mode of a multi-way valve-based thermal management system disclosed in an embodiment of the present application.

[0029] Figure 6 This is a schematic diagram of the connectivity of the sixth mode of a multi-way valve-based thermal management system disclosed in an embodiment of the present application.

[0030] Reference numerals

[0031] 101. First multi-way valve; A. First interface; B. Second interface; C. Third interface; D. Fourth interface; E. Fifth interface; F. Sixth interface; G. Seventh interface; H. Eighth interface; 102. First sensor; 103. First water pump; 104. Charger; 105. Electric drive assembly; 106. Second sensor; 107. Battery cooler; 108. Radiator; 109. Third sensor; 110. Second water pump; 111. Power battery; 112. Third water pump; 113. Heater; 114. Warm air core; 115. Five-way valve; J. First water inlet; M. Second water inlet; N. Third water inlet; K. Fourth water inlet; P. Fifth water inlet; 116. Expansion tank. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. All other embodiments derived by a user of ordinary skill in the art based on the embodiments in the present application without creative effort are also within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the present application, the terms "first", "second", "third", "fourth", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Users of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] Example

[0038] A common electric vehicle thermal management system includes three independent systems: an electric drive cooling system, a power battery temperature control system (including a heating system and a cooling system), and a heater system (including a cooling and heating system). In common integrated thermal management systems, in order to achieve complex water cooling circuit switching, a complex water valve system usually needs to be designed. Commonly used water valves are two-way valves and three-way valves. The current system usually includes multiple two-way valves and three-way valves. The system is complex, costly, and heavy, and it is impossible to reasonably utilize the waste heat in the system. For example, the waste heat of the electric drive assembly is used to heat the power battery, the waste heat of the electric drive assembly is used to heat the evaporator of the heat pump heater system (i.e., the battery cooler), and the waste heat of the power battery is used to heat the evaporator of the heat pump system, etc., which wastes energy in the system and leads to high system energy consumption. In addition, for the power battery box and passenger compartment that need to be heated, two independent heaters are used respectively, resulting in high system cost.

[0039] In view of this, if Figure 1 As shown, first of all, Figure 1It is a connection diagram of the first mode of a thermal management system based on a multi-way valve disclosed in an embodiment of the present application; the present application provides a thermal management system based on a multi-way valve, which can be applied to electric devices, as well as to home appliances, buildings, aircraft and ships. The thermal management system based on the multi-way valve includes: a water circuit switching mechanism, an electric drive cooling system, a battery temperature control system and a warm air system. The electric drive cooling system, the battery temperature control system and the warm air system are all connected to the water circuit switching mechanism. Through the switching of the water circuit switching mechanism, the coupling between the electric drive cooling system, the battery temperature control system and the warm air system can be completed, thereby reducing the investment cost, and realizing the heat exchange among the three, thereby reducing the energy consumption of the thermal management system.

[0040] Specifically, the water channel switching mechanism has a first multi-way valve 101 and a second multi-way valve, the first multi-way valve 101 is provided with a first interface A, a second interface B, a third interface C, a fourth interface D, a fifth interface E, a sixth interface F, a seventh interface G, and an eighth interface H, and the second multi-way valve is provided with a first water port J, a second water port M, and a third water port N; the electric drive cooling system has an electric drive mechanism and a first water pump 103, one end of the electric drive mechanism is connected to the first water pump 103, the other end of the electric drive mechanism is connected to the seventh interface G, and the first water pump 103 is connected to the second interface B; the battery temperature control system has a power battery 111 and a second water pump 110, one end of the power battery 111 is connected to the second water pump 110, and the other end of the power battery 111 is connected to the first interface A, The second water pump 110 is connected to the fourth interface D, and the third water outlet N is connected to the pipeline between the second water pump 110 and the fourth interface D; the warm air system has a battery cooler 107, a radiator 108, a heater 113, a warm air core 114 and a third water pump 112, one end of the battery cooler 107 is connected to the eighth interface H, the other end of the battery cooler 107 is connected to the third interface C, one end of the radiator 108 is connected to the fifth interface E, the other end of the radiator 108 is connected to the sixth interface F, one end of the heater 113 is connected to the third water pump 112, the other end of the heater 113 is connected to the warm air core 114, the warm air core 114 is connected to the first water outlet J, and the third water pump 112 is connected to the second water outlet M.

[0041] Exemplarily, the first multi-way valve 101 includes but is not limited to an eight-way valve. The working principle of the first multi-way valve 101 is illustrated by taking a ball valve as an example, but the specific implementation of the first multi-way valve 101 can be of other types. The interfaces of the first multi-way valve 101 can be connected in pairs through the flow channels on the valve core, and the valve core can rotate around the axis. After the rotation, the connection mode of the interface changes, thereby changing the connection mode of the thermal management system; the second multi-way valve includes but is not limited to a five-way valve 115, and the second multi-way valve has two modes: one, a proportional mode, the first water port J can be regarded as an inlet, and the second water port M and the third water port N can be regarded as a proportional three-way valve as an outlet. By rotating the valve core of the second multi-way valve, the ratio of the coolant flow of the second water port M and the third water port N in the process can be adjusted; the second, a full-pass mode, that is, the first water port J, the second water port M, the third water port N, the fourth water port K and the fifth water port P of the second multi-way valve are all connected. This mode can be used for adding coolant to the thermal management system.

[0042] Among them, the first water pump 103, the second water pump 110 and the third water pump 112 can all promote the flow of coolant in the thermal management system, thereby completing functions such as heat exchange and exhaust. The battery cooler 107 can realize heat exchange between the refrigerant and the coolant. After passing through the battery heat exchanger, the refrigerant absorbs the heat of the coolant and its temperature increases, while the temperature of the coolant decreases. The cooled coolant flows into the power battery 111 to cool it. The radiator 108 includes but is not limited to an air-to-liquid heat exchanger, which can transfer the heat of the coolant inside to the air flowing over its surface, thereby cooling the coolant. The heater 113 can use the electrical energy of the electric device to heat and increase the temperature of the coolant flowing through it. The heated coolant can heat the passenger compartment of the electric device or the power battery 111. The heater core 114 includes but is not limited to an air-to-liquid heat exchanger, which can transfer the heat of the coolant inside it to the air flowing over its surface. The hot air enters the passenger compartment and heats it.

[0043] In the above implementation process, the water path switching mechanism is provided with a first multi-way valve 101 and a second multi-way valve, the electric drive mechanism of the electric drive cooling system is connected to the seventh interface G of the first multi-way valve 101, and its first water pump 103 is connected to the second interface B, the power battery 111 of the battery temperature control system is connected to the first interface A, and its second water pump 110 is connected to the fourth interface D, the battery cooler 107 of the warm air system is respectively connected to the third interface C and the eighth interface H, the radiator 108 is respectively connected to the fifth interface E and the sixth interface F, the warm air core 114 is connected to the first water port J, and the third water pump 112 is connected to the second water port M, realizing the coupling of the electric drive cooling system, the battery temperature control system and the warm air system, realizing reasonable energy flow, reducing investment costs, and through the switching of the first multi-way valve 101 and the second multi-way valve, it is possible to realize the switching of multiple modes, thereby improving the integration of the thermal management system.

[0044] In some embodiments, the heating system further includes a connecting pipe, one end of which is connected to the pipe between the third water pump 112 and the second water outlet M, and the other end of which is connected to the pipe between the power battery 111 and the first interface A.

[0045] In the above implementation process, the connecting pipe is connected between the power battery 111 and the third water pump 112, which can connect the heating system and the battery temperature control system, and facilitate the refilling of coolant in the heating system and the battery temperature control system.

[0046] In some embodiments, the electrically driven cooling system further includes a first sensor 102, which includes but is not limited to a temperature sensor. One end of the first sensor 102 is connected to the second interface B, and the other end of the first sensor 102 is connected to the first water pump 103. By setting the first sensor 102 between the second interface B and the first water pump 103, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electrically driven cooling system.

[0047] In some embodiments, the electric drive mechanism includes an electric drive assembly 105 and a charger 104, one end of the electric drive assembly 105 is connected to the first water pump 103, the other end of the electric drive assembly 105 is connected to the charger 104, and the charger 104 is connected to the seventh interface G.

[0048] In the above implementation process, the electric drive assembly 105 is connected to the first water pump 103, and the charger 104 is connected to the seventh interface G, so that the waste heat generated during the operation of the electric drive assembly 105 and the charger 104 can be exchanged with the battery cooler 107 through the first multi-way valve 101, thereby achieving high efficiency of the thermal management system and reducing the energy consumption of the thermal management system.

[0049] In some embodiments, the battery temperature control system also includes a second sensor 106, which includes but is not limited to a temperature sensor. One end of the second sensor 106 is connected to the eighth interface H, and the other end of the second sensor 106 is connected to the battery cooler 107. By setting the second sensor 106 between the eighth interface H and the battery cooler 107, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electric drive cooling system.

[0050] In some embodiments, the warm air system also includes a third sensor 109, which includes but is not limited to a temperature sensor. One end of the third sensor 109 is connected to the second water pump 110, and the other end of the third sensor 109 is connected to the fourth interface D. By setting the third sensor 109 between the fourth interface D and the second water pump 110, it can be used to detect the temperature of the coolant there, thereby facilitating the control of the electric drive cooling system.

[0051] In some embodiments, the third water inlet N is connected to the pipeline between the third sensor 109 and the fourth interface D, which can facilitate adding coolant to the heat pipe system, wherein a portion of the coolant enters the second multi-way valve, and a portion of the coolant in the second multi-way valve enters the second water pump 110 and the third water pump 112 respectively through the third water inlet N, thereby pumping the coolant and avoiding the situation where the coolant is not fully filled.

[0052] In some embodiments, the second multi-way valve includes a fourth water port K and a fifth water port P, the fourth water port K is connected to the pipeline between the first water pump 103 and the second interface B, and the fifth water port P is connected to the pipeline between the third water pump 112 and the second water port; specifically, the fourth water port K is connected to the pipeline between the first sensor 102 and the second interface B.

[0053] In the above-mentioned implementation process, by setting the fourth water port K and the fifth water port P on the second multi-way valve, the flow ratio of the first water port J, the second water port M and the third water port N can be adjusted, and the full-pass mode of the first water port J, the second water port M, the third water port N, the fourth water port K and the fifth water port P can be realized, which can facilitate the cooling liquid filling of the thermal management system, improve the integration and reduce the investment in production costs.

[0054] Among them, the inventors found during the design process that in the existing integrated thermal management system, in order to reduce costs and avoid heat relaxation caused by unexpected liquid combinations between different systems, multiple expansion tanks that exist independently in each subsystem are usually integrated into an independent integrated expansion tank; one of the important functions of the expansion tank is to replenish the water pump when the coolant is added, prevent the water pump from running dry, and maintain the circulation of the liquid in the system. Therefore, in the traditional system, each expansion tank will be provided with an independent water supply pipe to replenish the coolant to the inlet of each water pump; in order to avoid water mixing, the integrated expansion tank can usually only be provided with one water supply pipe, so the water supply function of the integrated expansion tank will be greatly weakened. When filling, the integrated expansion tank often fails to replenish water for all water pumps normally, resulting in a lack of liquid at the inlet of some water pumps, and the coolant cannot be pumped, or even stops working due to a dry-run failure, which in turn causes the system to be fully filled with coolant.

[0055] In view of this, the multi-way valve-based thermal management system also includes an expansion water tank 116, one end of the expansion water tank 116 is connected to the pipeline between the second interface B and the first water pump 103, and the other end of the expansion water tank 116 is connected to the pipeline between the radiator 108 and the fifth interface E; specifically, one end of the expansion water tank 116 is connected to the pipeline between the second interface B and the first sensor 102.

[0056] In the above implementation process, by connecting the expansion water tank 116 to the pipeline between the second interface B and the first water pump 103, and connecting the power battery 111 and the third water pump 112 with a connecting pipeline, the first water pump 103, the second water pump 110 and the third water pump 112 can be filled with coolant, and the expansion water tank 116 can also store coolant, accommodate air overflowing from the thermal management system and adjust the limit pressure of the thermal management system.

[0057] like Figure 1As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111), the battery cooler 107 circuit (including the second sensor 106 and the battery cooler 107), and the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105) are connected in series; the heater circuit (including the third water pump 112, the heater 113, and the heater core 114) operates independently. This mode can be used in the following operating conditions: in a low-temperature environment, the power battery 111 needs to be heated, and the temperature of the electric drive assembly 105 is higher than that of the power battery 111, requiring heating of the passenger compartment. First water pump 103 drives the coolant to circulate within the system. The coolant flows through charger 104 and electric drive assembly 105, absorbing the heat released by both. The heated coolant flows through the 8-way valve's seventh port G, fourth port D, and third sensor 109. It is then pressurized by second water pump 110 and flows through power battery 111, transferring the heat within the coolant to power battery 111, raising its temperature. The cooled coolant continues to flow through the 8-way valve's first port A and eighth port H, second sensor 106, battery cooler 107, third port C, second port B, and first sensor 102, ultimately returning to first water pump 103, completing the cycle. Five-way valve 115 is now in proportional mode, with only first and second ports J and M connected, while third port N is closed. The warm air circuit composed of the third water pump 112, the heater 113, and the warm air core 114 forms an independent circulation loop through the five-way valve 115, that is, the third water pump 112 drives the coolant to circulate in the system, the coolant flows through the heater 113 and is heated by it, and the coolant with increased temperature flows through the warm air core 114. After absorbing the heat of the coolant, the warm air core 114 heats the air flowing over its surface, and the hot air is blown into the passenger compartment to heat it. The coolant passes through the first water port J and the second water port M of the five-way valve 115, and finally returns to the third water pump 112 to complete the cycle.

[0058] like Figure 2As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111), the battery cooler 107 circuit (including the second sensor 106 and the battery cooler 107), the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105), the radiator 108 circuit (including the radiator 108), and the warm air circuit (including the third water pump 112, the heater 113, and the warm air core 114) are all connected together. This mode can be used for the case where the thermal management system is filled with coolant; specifically, after the coolant is added to the expansion water tank 116, it is divided into two parts. One part flows through the first sensor 102 to reach the inlet of the first water pump 103, and then passes through the charger 104, the electric drive assembly 105, the seventh interface G and the eighth interface H of the eight-way valve, the second sensor 106, the battery cooler 107, the third interface C, the sixth interface F, the radiator 108, the fifth interface E, the fourth interface D, the third sensor 109, the second water pump 110, the power battery 111, the first interface A, the second interface B, and finally passes through the first sensor 102 back to the first The first water pump 103 completes the circulation; the other part enters the valve core of the five-way valve 115 through the fourth water port K of the five-way valve 115. The coolant is divided into several parts inside the valve core: one part passes through the third water port N of the five-way valve 115 and the third sensor 109 to reach the inlet of the second water pump 110. After that, the coolant can enter the third water pump 112 through the connecting pipe, or enter the first water pump 103 through the eight-way valve, or enter the third water pump 112 and the first water pump 103 respectively, etc., which are not specifically limited here; the other part reaches the inlet of the third water pump 112 through the second water port M and the fifth water port P of the five-way valve 115. In summary, the coolant can smoothly reach the inlets of the three water pumps, facilitating system filling.

[0059] like Figure 3As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111) is connected in series with the battery cooler 107 circuit (the second sensor 106 and the battery cooler 107), and the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105) is connected in series with the radiator 108 circuit (including the radiator 108). This mode can be used in the following working conditions: in a high temperature environment, the power battery 111 needs to be cooled by the battery cooler 107, and the temperature of the charger 104 and the electric drive assembly 105 needs to be cooled by the radiator 108. The first water pump 103 drives the coolant to circulate in the system, and the coolant flows through the charger 104 and the electric drive assembly 105 to absorb the heat released by the two. The heated coolant enters the seventh port G of the eight-way valve and flows out of the eight-way valve through the sixth port F. It then flows through the radiator 108, where the heat in the coolant is removed by the air. The cooled coolant then flows through the fifth port E and second port B of the eight-way valve, passes through the first sensor 102, and returns to the first water pump 103, completing the cycle. The second water pump 110 drives the coolant to circulate within the system. The coolant flows through the power battery 111, absorbing the heat released by it. The heated coolant then flows through the first port A and eighth port H of the eight-way valve, then flows through the second sensor 106 and the battery cooler 107. The heat in the coolant is removed by the battery cooler 107. The cooled coolant then flows through the third port C and fourth port D of the eight-way valve, and then passes through the third sensor 109 and returns to the second water pump 110, completing the cycle.

[0060] like Figure 4As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111) is connected to the heater circuit (including the third water pump 112, the heater 113, and the heater core 114), and the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105) is connected in series with the battery cooler 107 circuit (the second sensor 106 and the battery cooler 107). This mode can be used in the following operating conditions: in low-temperature environments, the power battery 111 and the heater core 114 need to be heated by the heater 113, and the electric drive assembly 105 needs to be kept warm. The first water pump 103 drives the coolant to circulate within the system. The coolant flows through the charger 104, the electric drive assembly 105, the seventh port G and the eighth port H of the eight-way valve, the second sensor 106, the battery cooler 107, the third port C and the second port B of the eight-way valve, the first sensor 102, and finally returns to the first water pump 103, completing the cycle. The coolant is not significantly heated or cooled in the circulation, but its temperature increases slowly, and the temperature of the charger 104 and the electric drive assembly 105 remains uniform. The third water pump 112 drives the coolant to circulate in the system. The coolant flows through the heater 113 and is heated by it. The coolant with increased temperature flows through the heater core 114. After absorbing the heat of the coolant, the heater core 114 heats the air flowing over its surface. The hot air is blown into the passenger compartment to heat it. After passing through the first water port J of the five-way valve 115, the coolant is divided into two parts of water flow: one part flows through the second water port M of the five-way valve 115 and the third water pump 112 to complete the circulation; the other part flows through the third water port N of the five-way valve 115 and the third sensor 109, is pressurized by the second water pump 110, and flows through the power battery 111 to heat it. Then the coolant is divided into two parts. One part passes through the first port A and the fourth port D of the eight-way valve and the third sensor 109, and finally returns to the second water pump 110 to complete the circulation of this part of the coolant; the other part of the coolant flows directly back to the third water pump 112 to complete the circulation of this part of the coolant. In this mode, the five-way valve 115 can adjust the relative opening of the second water inlet M and the third water inlet N to adjust the flow of coolant flowing through the second water inlet M and the third water inlet N, and ultimately achieve energy distribution of the heat generated by the heater 113 between the power battery 111 and the heater core 114.

[0061] Mode 4 is also used in the following operating conditions: In a low-temperature environment, the power battery 111 and heater core 114 need to be heated by the heater 113, and the electric drive assembly 105 heats the battery cooler 107. The principle of heating the power battery 111 and heater core 114 by the heater 113 is the same as in the previous paragraph and will not be repeated. The first water pump 103 drives the coolant to circulate within the system. The coolant flows through the charger 104 and the electric drive assembly 105 and is heated. The heated coolant then passes through the seventh and eighth ports G and H of the eight-way valve and the second sensor 106, and enters the battery cooler 107 to be heated. This transfers the heat generated by the charger 104 and the electric drive assembly 105 to the heater system. The cooled coolant then flows through the third and second ports C and B of the eight-way valve and the first sensor 102, and finally returns to the first water pump 103, completing the cycle.

[0062] like Figure 5 As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111), the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105), and the radiator 108 circuit (including the radiator 108) are connected in series. The warm air circuit (including the third water pump 112, the heater 113, and the warm air core 114) operates independently. This mode can be used in the following operating conditions: at room temperature, the power battery 111 and the electric drive assembly 105 are simultaneously cooled by the radiator 108, and the warm air circuit is in operation. The first water pump 103 drives the coolant to circulate in the system. The coolant flows through the charger 104 and the electric drive assembly 105 to absorb the heat released by the two. The coolant with increased temperature flows through the seventh port G and the sixth port F of the eight-way valve, and then enters the radiator 108, where the coolant is cooled and the temperature is reduced. The cooled coolant flows through the fifth port E and the fourth port D of the eight-way valve and the third sensor 109, and is then pressurized by the second water pump 110 and enters the power battery 111 to cool it. The coolant then enters the first port A and the second port B of the eight-way valve, the first sensor 102, and finally returns to the first water pump 103, ending the cycle. The five-way valve 115 is in proportional mode at this time, and only the first water port J and the second water port M are connected, and the third water port N is closed; the warm air circuit composed of the third water pump 112, the heater 113, and the warm air core 114 forms an independent circulation loop through the five-way valve 115; the third water pump 112 drives the coolant to circulate in the system, and the coolant flows through the heater 113 and is heated by it. The coolant with increased temperature flows through the warm air core 114, and the warm air core 114 absorbs the heat of the coolant and heats the air flowing over its surface. The hot air is blown into the passenger compartment to heat it, and the coolant passes through the first water port J and the second water port M of the five-way valve 115, and finally returns to the third water pump 112 to complete the cycle.

[0063] like Figure 6 As shown, in this mode, the battery circuit (including the third sensor 109, the second water pump 110, and the power battery 111) and the battery cooler 107 circuit (the second sensor 106 and the battery cooler 107) are connected in series, the electric drive circuit (including the first sensor 102, the first water pump 103, the charger 104, and the electric drive assembly 105) works independently, and the warm air circuit (including the third water pump 112, the heater 113, and the warm air core 114) works independently. This mode can be used in the following working conditions: in a low-temperature environment, the electric drive assembly 105 is kept warm, the power battery 111 and the battery cooler 107 are cooled, and the warm air circuit works. The first water pump 103 drives the coolant to circulate in the system. The coolant flows through the charger 104, the electric drive assembly 105, the seventh port G and the second port B of the eight-way valve, and the first sensor 102, and finally returns to the first water pump 103 to complete the cycle. The coolant is not significantly heated or cooled within the circuit, but rather its temperature slowly increases, maintaining a uniform temperature within the charger 104 and the electric drive assembly 105. The second water pump 110 drives the coolant through the system, where it flows through the power battery 111, absorbing the heat released. The heated coolant then passes through the first and eighth ports A and H of the eight-way valve, then through the second sensor 106 and the battery cooler 107. The heat within the coolant is removed by the battery cooler 107, and the coolant then passes through the third and fourth ports C and D of the eight-way valve, returning to the second water pump 110 through the third sensor 109, completing the circuit. The five-way valve 115 is now in proportional mode, with only the first and second water ports M connected; the third water port N is closed. The warm air circuit composed of the third water pump 112, the heater 113, and the warm air core 114 forms an independent circulation circuit through the five-way valve 115, that is, the third water pump 112 drives the coolant to circulate in the system, the coolant flows through the heater 113 and is heated by it, and the coolant with increased temperature flows through the warm air core 114. After absorbing the heat of the coolant, the warm air core 114 heats the air flowing over its surface, and the hot air is blown into the passenger compartment to heat it. The coolant passes through the first water port J and the second water port M of the five-way valve 115, and finally returns to the third water pump 112 to complete the cycle.

[0064] It can be understood that the thermal management system based on the multi-way valve can make full use of waste heat. For example, the waste heat of the electric drive assembly 105 can be used to heat the power battery 111 (first mode), the waste heat of the electric drive assembly 105 can be used to heat the battery cooler 107 of the warm air system (fourth mode), and the waste heat of the power battery 111 can be used to heat the battery cooler 107 of the warm air system (third mode) to achieve high efficiency of the thermal management system; the power battery 111 can be cooled by the battery cooler 107 or the radiator 108. In medium and low temperature environments, a low-energy radiator 108 can be used for cooling to reduce the energy consumption of the thermal management system. Through the design of the first multi-way valve 101 and the second multi-way valve, only one heater 113 can be used to cool the power battery 111 and the warm air core 114, saving the cost of the thermal management system and achieving precise heat distribution.

[0065] In a second aspect, the present application also provides an electric device, comprising a thermal management system based on a multi-way valve as described in any one of the above items; illustratively, the electric device can be one of an electric vehicle / electric vehicle (EV), a pure electric vehicle (PV / BEV), a hybrid electric vehicle (HEV), an extended-range electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle (New Energy Vehicle), an electric bus, and an electric motorcycle.

[0066] The electric vehicle provided in the second embodiment of the present application includes the thermal management system based on the multi-way valve described in the technical solution of the first aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.

[0067] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for users skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A thermal management system based on a multi-way valve, characterized in that: include: The waterway switching mechanism comprises a first multi-way valve and a second multi-way valve, wherein the first multi-way valve is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface, and the second multi-way valve is provided with a first water port, a second water port, and a third water port; An electrically driven cooling system comprising a radiator, an electrically driven mechanism, and a first water pump, wherein one end of the radiator is connected to the fifth port, the other end of the radiator is connected to the sixth port, one end of the electrically driven mechanism is connected to the first water pump, the other end of the electrically driven mechanism is connected to the seventh port, and the first water pump is connected to the second port; A battery temperature control system comprising a battery cooler, a power battery, and a second water pump, wherein one end of the battery cooler is connected to the eighth port, the other end of the battery cooler is connected to the third port, one end of the power battery is connected to the second water pump, the other end of the power battery is connected to the first port, the second water pump is connected to the fourth port, and the third water inlet is connected to the pipeline between the second water pump and the fourth port; A warm air system comprising a heater, a warm air core and a third water pump, wherein one end of the heater is connected to the third water pump, the other end of the heater is connected to the warm air core, the warm air core is connected to the first water inlet, and the third water pump is connected to the second water inlet; The second multi-way valve includes a fourth water port and a fifth water port. The fourth water port is connected to the pipeline between the first water pump and the second interface. The fifth water port is connected to the pipeline between the third water pump and the second water port.

2. The thermal management system based on a multi-way valve according to claim 1, characterized in that: The heating system further includes a connecting pipe, one end of which is connected to the pipe between the third water pump and the second water outlet, and the other end of which is connected to the pipe between the power battery and the first interface.

3. The thermal management system based on a multi-way valve according to claim 1, characterized in that: The electrically driven cooling system further includes a first sensor, one end of which is connected to the second interface, and the other end of which is connected to the first water pump.

4. The thermal management system based on a multi-way valve according to claim 1, characterized in that: The electric drive mechanism includes an electric drive assembly and a charger. One end of the electric drive assembly is connected to the first water pump, and the other end of the electric drive assembly is connected to the charger. The charger is connected to the seventh interface.

5. The thermal management system based on a multi-way valve according to claim 1, characterized in that: The battery temperature control system further includes a second sensor, one end of the second sensor is connected to the eighth interface, and the other end of the second sensor is connected to the battery cooler.

6. The multi-way valve-based thermal management system according to claim 1, characterized in that: The heating system further includes a third sensor, one end of the third sensor is connected to the second water pump, and the other end of the third sensor is connected to the fourth interface.

7. The multi-way valve-based thermal management system according to claim 6, characterized in that: The third water outlet is connected to the pipeline between the third sensor and the fourth interface.

8. The multi-way valve-based thermal management system according to claim 1, characterized in that: The multi-way valve-based thermal management system also includes an expansion water tank, one end of which is connected to the pipeline between the second interface and the first water pump, and the other end of which is connected to the pipeline between the radiator and the fifth interface.

9. An electric device, characterized in that: The invention comprises a thermal management system based on a multi-way valve as described in any one of claims 1 to 8.

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