New energy automobile thermal management system and new energy automobile

Abstract

The invention provides a new energy automobile heat management system and a new energy automobile. The new energy automobile heat management system comprises a battery loop, an electric drive loop, a refrigerant loop, an intercooling heat dissipation loop and a multi-way valve. A single multi-way valve is arranged to be connected with a battery loop, an electric drive loop, an intercooling heat dissipation loop and a refrigerant loop, and different valve ports of the multi-way valve are switched and communicated according to the heat dissipation or heating requirements of all parts and spaces of the new energy automobile, so that partial or all communication of the battery loop, the electric drive loop, the intercooling heat dissipation loop and the refrigerant loop is achieved; therefore, various thermal management modes are achieved, the energy of the whole automobile is efficiently utilized on the premise that the thermal management requirements of all parts of the new energy automobile are met, the number of the valve bodies is reduced, and therefore the space requirement and complexity of the whole thermal management system are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management of new energy vehicles, and in particular to a thermal management system for new energy vehicles and new energy vehicles. Background Art

[0002] With the continuous development of new energy vehicle technology, new energy vehicles have become a common and indispensable means of transportation in people's daily lives. Hybrid / extended-range vehicles include both engine and battery dual power sources, which generate a lot of heat. In order to ensure the safety and reliability of various components of the vehicle, it is necessary to perform thermal management on various components of the vehicle to maintain them within a reasonable operating temperature range. For example, the discharge efficiency of the battery is significantly low in a low temperature environment, so it is necessary to heat or keep it warm to improve its discharge efficiency. The battery also has certain safety hazards in a high temperature environment, so it needs to be cooled.

[0003] For hybrid / extended-range vehicles, their engines, motors, and batteries all generate heat when working and need to be dissipated, and the batteries need to be heated in low-temperature environments. The car cabin needs to be heated in low-temperature environments and needs to be dissipated in high-temperature environments. How to efficiently utilize the heat generated inside the car to meet the vehicle's thermal management needs and minimize energy consumption is an important technical issue in the field of thermal management technology. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a new energy vehicle thermal management system and a new energy vehicle.

[0005] According to one aspect of the present application, a new energy vehicle thermal management system is provided, including: an electric drive circuit, which is used to implement thermal management of the electric drive system; a battery circuit, which is used to implement thermal management of the power battery; a refrigerant circuit, which is used to provide heat or absorb heat using a refrigerant, and the refrigerant circuit includes a refrigerant shut-off valve, which is used to turn on or off part or all of the refrigerant circuit; an intercooler heat dissipation circuit, which is used to dissipate heat from engine exhaust, and the intercooler heat dissipation circuit is arranged in parallel with the electric drive circuit; a multi-way valve; wherein the multi-way valve connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and switches to connect different valve ports of the multi-way valve to connect part or all of the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit.

[0006] In one embodiment, the battery circuit includes a battery water pump, a battery cooling channel and a cold end of a plate heat exchanger which are connected in sequence; wherein the inlet of the battery water pump is connected to the valve port 4 of the multi-way valve, the cold side outlet of the plate heat exchanger is connected to the valve port 6 of the multi-way valve, and the hot side of the plate heat exchanger is connected to the heating circulation circuit.

[0007] In one embodiment, the refrigerant circuit includes a connected compressor, an air-cooled condenser, a water-cooled condenser and a chiller, wherein the air-cooled condenser and the water-cooled condenser are arranged in parallel, and the refrigerant stop valve includes a first refrigerant stop valve and a second refrigerant stop valve, the first refrigerant stop valve is arranged at the air-cooled condenser, and is used to connect or cut off the air-cooled condenser, and the second refrigerant stop valve is arranged at the water-cooled condenser, and is used to connect or cut off the water-cooled condenser, and the water side inlet and water side outlet of the chiller are respectively connected to the valve port 7 and valve port 2 of the multi-way valve.

[0008] In one embodiment, the refrigerant circuit further includes an evaporator, the inlet of the evaporator is connected to the outlet of the air-cooled condenser and the refrigerant-side outlet of the water-cooled condenser, and the outlet of the evaporator is connected to the inlet of the compressor.

[0009] In one embodiment, the new energy vehicle thermal management system also includes: a heating circulation loop, which is used to provide heat to the passenger compartment. The heating circulation loop includes a heater core, and the inlet and outlet of the heater core are respectively connected to the water side outlet and water side inlet of the water-cooled condenser.

[0010] In one embodiment, the heating circulation loop also includes a warm air water pump, a PTC, a first proportional three-way valve and a second proportional three-way valve, wherein the first proportional three-way valve connects the water side outlet of the water-cooled condenser, the inlet of the warm air water pump and the engine circulation loop, and the second proportional three-way valve connects the outlet of the warm air water pump, the battery circuit and the inlet of the warm air core.

[0011] In one embodiment, the intercooler heat dissipation circuit includes a third proportional three-way valve, an intercooler radiator, and a water-cooled intercooler plate exchanger which are connected in sequence; wherein the outlet of the water-cooled intercooler plate exchanger is connected to the electric drive circuit, and the third proportional three-way valve connects the inlet of the intercooler radiator, the outlet of the intercooler radiator and the electric drive circuit.

[0012] In one embodiment, the electric drive circuit includes a low-temperature radiator, a motor water pump and a motor cooling channel which are connected in sequence; wherein the outlet of the motor cooling channel is connected to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator is connected to the valve port 3 of the multi-way valve, and the inlet of the motor water pump is connected to the valve port 1 of the multi-way valve.

[0013] In one embodiment, the new energy vehicle thermal management system also includes an engine circulation loop, which is used to dissipate heat from the engine, and the engine circulation loop includes an engine water pump, an engine water jacket, a thermostat and a high-temperature radiator connected in sequence; wherein, the inlet and outlet of the engine water jacket are both connected to the heating circulation loop, and the connection point between the inlet of the engine water jacket and the heating circulation loop is located upstream of the connection point between the outlet of the engine water jacket and the heating circulation loop.

[0014] According to another aspect of the present application, a new energy vehicle is provided, comprising: an engine, a motor, a battery, and any one of the above-mentioned new energy vehicle thermal management systems.

[0015] Compared with the prior art, the new energy vehicle thermal management system and new energy vehicle provided by the present application have the following specific beneficial effects: 1. By setting a multi-way valve, the multi-way valve connects the battery circuit, the electric drive circuit and the refrigerant circuit, and switching the different valve ports of the multi-way valve to connect part or all of the battery circuit, the electric drive circuit and the refrigerant circuit; that is, by setting a single multi-way valve to connect the battery circuit, the electric drive circuit and the refrigerant circuit, the different valve ports of the multi-way valve are switched according to the heat dissipation or heating requirements of various components and spaces in the new energy vehicle, thereby achieving partial or full connection of the battery circuit, the electric drive circuit and the refrigerant circuit, and then realizing a variety of thermal management modes, while meeting the thermal management requirements of various components of the new energy vehicle. The energy of the entire vehicle is efficiently utilized, and the number of valve bodies is reduced, thereby reducing the space requirement and complexity of the entire thermal management system.

[0016] 2. By connecting an air-cooled condenser and a water-cooled condenser in parallel, the heat exchange efficiency of the refrigerant circuit is improved, and heat exchange is performed through the water-cooled condenser to realize a heat pump mode, so that the heat in the water-cooled condenser is recovered to heat the passenger compartment or the battery, thereby improving the utilization rate of heat and reducing heating energy consumption.

[0017] 3. The design of a single water source heat pump reduces system complexity, simplifies heat pump control, and saves refrigerant-side components related to air source heat pumps.

[0018] 4. By setting up the electric drive circuit and intercooler heat dissipation circuit in parallel, in the winter extended-range mode, the electric drive circuit absorbs the heat generated by the electric drive system and the heat of the intercooler gas to maximize the use of waste heat sources, achieve thermal insulation and heat storage in the electric drive circuit, and when switching to pure electric mode, it can provide maximum heat source for the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0020] Figure 1 It is a structural schematic diagram of a new energy vehicle thermal management system provided by an exemplary embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of a working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of a working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of a working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0024] Explanation of the reference numerals: 101, multi-way valve; 102, battery water pump; 103, battery cooling channel; 104, plate heat exchanger; 105, compressor; 106, air-cooled condenser; 107, water-cooled condenser; 108, first refrigerant stop valve; 109, second refrigerant stop valve; 110, evaporator; 111, first coaxial tube; 112, second coaxial tube; 113, drying tank; 114, first electronic expansion valve; 115, first Two electronic expansion valves; 116, heater core; 117, heater water pump; 118, first proportional three-way valve; 119, second proportional three-way valve; 120, third proportional three-way valve; 121, intercooler radiator; 122, water-cooled intercooler plate exchanger; 123, engine water pump; 124, engine water jacket; 125, thermostat; 126, high-temperature radiator; 127, low-temperature radiator; 128, motor water pump; 129, motor cooling channel. DETAILED DESCRIPTION

[0025] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0026] Figure 1 Schematic diagram of the structure of a new energy vehicle thermal management system provided by an exemplary embodiment of the present application. Figure 1As shown, the thermal management system of the new energy vehicle includes: an electric drive circuit, which is used to realize the thermal management of the electric drive system; a battery circuit, which is used to realize the thermal management of the power battery; a refrigerant circuit, which is used to provide heat or absorb heat using a refrigerant, and the refrigerant circuit includes a refrigerant shut-off valve, which is used to conduct or shut off part or all of the refrigerant circuit; an intercooler heat dissipation circuit, which is used to dissipate the heat of the engine exhaust, and the intercooler heat dissipation circuit is arranged in parallel with the electric drive circuit; a multi-way valve 101; wherein the multi-way valve 101 connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and switches to connect different valve ports of the multi-way valve 101 to connect part or all of the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit.

[0027] The new energy vehicle thermal management system of the present application can be applied to hybrid vehicles or extended-range vehicles, wherein both hybrid vehicles and extended-range vehicles include an engine, a motor and a battery. The new energy vehicle thermal management system provided in the present application includes a battery circuit, an electric drive circuit, an intercooler heat dissipation circuit and a refrigerant circuit. The electric drive circuit is used to realize the thermal management of the electric drive system, the battery circuit is used to realize the thermal management of the power battery, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, and the intercooler heat dissipation circuit is used to dissipate the heat of the engine exhaust. The intercooler heat dissipation circuit and the electric drive circuit are arranged in parallel; and the present application connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit through a multi-way valve 101 to realize the connectivity of multiple circuits, and connects the different valve ports of the multi-way valve 101 to connect part or all of the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, so as to realize heat exchange between multiple circuits using a single multi-way valve 101, which can not only effectively reduce the number of valve bodies used to save costs, but also reduce the complexity of the thermal management system. At the same time, the comprehensive management of multiple circuits can be used to more effectively manage the thermal management of each circuit, thereby improving the thermal management efficiency and effect of the thermal management system of the new energy vehicle, and then reducing the thermal management energy consumption.

[0028] A new energy vehicle thermal management system provided by the present application includes a battery circuit, an electric drive circuit, a refrigerant circuit, an intercooler heat dissipation circuit and a multi-way valve; wherein the electric drive circuit is used to realize the thermal management of the electric drive system, the battery circuit is used to realize the thermal management of the power battery, the refrigerant circuit is used to use the refrigerant to provide heat or absorb heat, the intercooler heat dissipation circuit is used to dissipate heat from the engine exhaust, the intercooler heat dissipation circuit is arranged in parallel with the electric drive circuit, the multi-way valve 101 connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and the different valve ports of the multi-way valve 101 are switched to connect the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit. Part or all of the thermal circuit and the refrigerant circuit; that is, by setting a single multi-way valve 101 to connect the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, the different valve ports of the multi-way valve 101 are switched according to the heat dissipation or heating requirements of various components and spaces of the new energy vehicle, thereby realizing partial or full connectivity of the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and then realizing a variety of thermal management modes, efficiently utilizing the energy of the entire vehicle while meeting the thermal management requirements of various components of the new energy vehicle, and reducing the number of valve bodies, thereby reducing the space requirement and complexity of the entire thermal management system.

[0029] In one embodiment, if Figure 1 As shown, the battery circuit includes a battery water pump 102, a battery cooling channel 103 and a plate heat exchanger 104 which are connected in sequence; wherein the inlet of the battery water pump 102 is connected to the valve port 4 of the multi-way valve 101, the cold side outlet of the plate heat exchanger 104 is connected to the valve port 6 of the multi-way valve, and the hot side of the plate heat exchanger 104 is connected to the heating circulation circuit.

[0030] The battery circuit in the present application includes a battery water pump 102, a battery cooling channel 103 and a plate heat exchanger 104. The battery water pump 102, the battery cooling channel 103 and the plate heat exchanger 104 are connected in sequence through cooling pipes to form a circulation loop, wherein the battery cooling channel 103 is a heat dissipation water channel structure arranged at the battery pack or the battery cell, and the low-temperature coolant (such as water with a lower temperature) in the battery circuit is used to flow through the battery cooling channel 103 to take away the heat of the battery cell to achieve battery cooling, and at the same time, the high-temperature coolant in the battery circuit is used to flow through the battery cooling channel 103 to exchange heat with the battery cell to achieve heating of the battery. In the present application, the inlet of the battery water pump 102 is connected to the valve port 4 of the multi-way valve 101, and the cold side outlet of the plate heat exchanger 104 is connected to the valve port 6 of the multi-way valve 101 to achieve closed-loop connection of the battery circuit, and the heat exchange between the cold side and the hot side of the plate heat exchanger 104 is used to achieve heating of the battery pack.

[0031] In one embodiment, if Figure 1As shown, the refrigerant circuit includes a compressor 105, an air-cooled condenser 106, a water-cooled condenser 107 and a chiller which are connected in sequence, wherein the air-cooled condenser 106 and the water-cooled condenser 107 are arranged in parallel, and the refrigerant stop valve includes a first refrigerant stop valve 108 and a second refrigerant stop valve 109. The first refrigerant stop valve 108 is arranged at the air-cooled condenser for connecting or cutting off the air-cooled condenser 106, and the second refrigerant stop valve 109 is arranged at the water-cooled condenser 107 for connecting or cutting off the water-cooled condenser 107. The water side inlet and the water side outlet of the chiller are respectively connected to the valve port 7 and the valve port 2 of the multi-way valve 101.

[0032] The refrigerant circuit of the present application includes a compressor 105, an air-cooled condenser 106, a water-cooled condenser 107 and a chiller. The compressor 105, the air-cooled condenser 106, the water-cooled condenser 107 and the chiller are connected in sequence through a cooling pipeline to form a circulation loop. The present application sets the air-cooled condenser 106 and the water-cooled condenser 107 in parallel, and combines the first refrigerant stop valve 108 and the second refrigerant stop valve 109 to respectively realize the conduction or cutoff of the air-cooled condenser 106 and the water-cooled condenser 107, and uses the air-cooled condenser 106 to realize refrigeration in high temperature scenes, and the water-cooled condenser 107 to realize the heat pump mode. And the present application connects the water side inlet and the water side outlet of the chiller to the valve port 7 and the valve port 2 of the multi-way valve 101 respectively, and uses the multi-way valve 101 to connect the refrigerant circuit with other circuits to improve the utilization rate of the refrigerant circuit.

[0033] In one embodiment, if Figure 1 As shown, the refrigerant circuit also includes an evaporator 110, the inlet of the evaporator 110 is connected to the outlet of the air-cooled condenser 106 and the refrigerant side outlet of the water-cooled condenser 107, the outlet of the evaporator 110 is connected to the inlet of the compressor 105, and the evaporator 110 is connected in parallel with the refrigerant side of the chiller.

[0034] The present application arranges an evaporator 110 between the inlet of the compressor 105 and the outlet of the air-cooled condenser 106 and the refrigerant side outlet of the water-cooled condenser 107 in the refrigerant circuit. The low-temperature condensed liquid flowing out of the refrigerant side of the air-cooled condenser 106 and the water-cooled condenser 107 exchanges heat with the outside air at the evaporator 110, vaporizes and absorbs heat to achieve a refrigeration effect.

[0035] In one embodiment, if Figure 1 As shown, the refrigerant circuit further includes a first coaxial tube 111 and a second coaxial tube 112 ; wherein the first coaxial tube 111 and the second coaxial tube 112 are respectively disposed at two ends of the evaporator 110 .

[0036] The present application arranges a first coaxial tube 111 between the inlet of the compressor 105 and the outlet of the evaporator 110, and arranges a second coaxial tube 112 between the inlet of the evaporator 110 and the outlet of the air-cooled condenser 106 and the refrigerant side outlet of the water-cooled condenser 107, so as to increase the supercooling of the liquid refrigerant by using the coaxial tubes to improve the refrigeration effect.

[0037] Optional, such as Figure 1 As shown, the refrigerant circuit of the present application may also include a drying tank 113, which is arranged between the outlet of the air-cooled condenser 106, the refrigerant side outlet of the water-cooled condenser 107 and the second coaxial tube 112. The drying tank 113 is used to store excess liquid refrigerant so as to compensate and adjust the profit and loss of liquid refrigerant when the working conditions change. Figure 1 As shown, the refrigerant circuit of the present application may also include a first electronic expansion valve 114 and a second electronic expansion valve 115. The first electronic expansion valve 114 and the second electronic expansion valve 115 are respectively arranged between the refrigerant side inlet of the chiller and the second coaxial tube 112, and between the second coaxial tube 112 and the inlet of the evaporator 110. The first electronic expansion valve 114 and the second electronic expansion valve 115 are used to adjust the refrigerant flow rate of the refrigerant side of the chiller and the evaporator 110 to achieve temperature regulation.

[0038] In one embodiment, if Figure 1 As shown, the above-mentioned new energy vehicle thermal management system can also include a heating circulation loop, which is used to provide heat to the passenger compartment. The heating circulation loop includes a heater core 116, and the inlet and outlet of the heater core 116 are respectively connected to the water side outlet and water side inlet of the water-cooled condenser 107.

[0039] The heating circulation loop of the present application includes a warm air core 116, the inlet and outlet of the warm air core 116 are respectively connected to the water side outlet and water side inlet of the water-cooled condenser 107 to form a circulation loop. The heat exchange between the water side and the refrigerant side of the water-cooled condenser 107 is utilized to realize the heat exchange between the heating circulation loop 116 and the refrigerant loop, so as to improve the utilization rate of the heating circulation loop.

[0040] In one embodiment, if Figure 1 As shown, the heating circulation loop also includes a warm air water pump 117, a PTC, a first proportional three-way valve 118 and a second proportional three-way valve 119. The first proportional three-way valve 118 is connected to the water side outlet of the water-cooled condenser 107, the inlet of the warm air water pump 117 and the engine circulation loop, and the second proportional three-way valve 119 is connected to the outlet of the warm air water pump 117, the battery circuit and the inlet of the warm air core 116.

[0041] The heating circulation loop of the present application also includes a heater water pump 117, a PTC, a first proportional three-way valve 118 and a second proportional three-way valve 119. The first proportional three-way valve 118 is connected to the water side outlet of the water-cooled condenser 107, the inlet of the heater water pump 117 and the engine circulation loop. The second proportional three-way valve 119 is connected to the outlet of the heater water pump 117, the battery circuit and the inlet of the heater core 116. The first proportional three-way valve 118 is used to connect the heating circulation loop and the engine circulation loop so that the engine heat can be used as heating heat. The second proportional three-way valve 119 is used to connect the heating circulation loop and the battery circuit so that the heat of the heating circulation loop heats the battery circuit, thereby improving the utilization rate of heat.

[0042] In one embodiment, if Figure 1 As shown, the intercooler heat dissipation circuit includes a third proportional three-way valve 120, an intercooler radiator 121, and a water-cooled intercooler plate changer 122 which are connected in sequence; wherein, the outlet of the water-cooled intercooler plate changer 122 is connected to the electric drive circuit, and the third proportional three-way valve 120 is connected to the inlet of the intercooler radiator 121, the outlet of the intercooler radiator 121 and the electric drive circuit.

[0043] The intercooler heat dissipation circuit of the present application includes a third proportional three-way valve 120, an intercooler radiator 121, and a water-cooled intercooler plate changer 122. The third proportional three-way valve 120, the intercooler radiator 121, and the water-cooled intercooler plate changer 122 are connected by pipelines to form a closed loop to achieve heat dissipation of engine exhaust gas; and the present application achieves thermal insulation and heat storage of the intercooler heat dissipation circuit by short-circuiting the third proportional three-way valve 120 (i.e., only connecting valve port 1 and valve port 2), and transfers the heat in the intercooler heat dissipation circuit to the electric drive circuit to achieve heating of the motor.

[0044] In one embodiment, if Figure 1 As shown, the above-mentioned new energy vehicle thermal management system can also include an engine circulation loop, which is used to dissipate heat from the engine. The engine circulation loop includes an engine water pump 123, an engine water jacket 124, a thermostat 125 and a high-temperature radiator 126 connected in sequence; wherein, the inlet and outlet of the engine water jacket are both connected to the heating circulation loop, and the connection point between the inlet of the engine water jacket and the heating circulation loop is located upstream of the connection point between the outlet of the engine water jacket and the heating circulation loop.

[0045] The engine circulation loop of the present application includes an engine water pump 123, an engine water jacket 124, a thermostat 125 and a high-temperature radiator 126. The engine water pump 123, the engine water jacket 124, the thermostat 125 and the high-temperature radiator 126 are sequentially connected through a cooling pipeline to form a circulation loop, wherein the engine water jacket 124 is a heat dissipation water channel structure arranged at the engine. The present application connects the inlet of the engine water jacket 124 to the valve port 3 of the first proportional three-way valve 118, and the outlet of the engine water jacket 124 to the inlet of the warm air water pump 117, so as to realize the parallel connection of the engine circulation loop and the heating circulation loop, and utilizes the heat of the engine circulation loop to heat the heating circulation loop to increase the temperature of the heating circulation loop, so as to improve the utilization rate of the engine heat.

[0046] In one embodiment, if Figure 1 As shown, the electric drive circuit includes a low-temperature radiator 127, a motor water pump 128 and a motor cooling channel 129 which are connected to each other; wherein the outlet of the motor cooling channel 129 is connected to the valve port 5 of the multi-way valve 101, and the inlet of the low-temperature radiator 127 is connected to the valve port 3 of the multi-way valve 101.

[0047] The electric drive circuit of the present application includes a low-temperature radiator 127, a motor water pump 128 and a motor cooling channel 129. The low-temperature radiator 127, the motor water pump 128 and the motor cooling channel 129 are sequentially connected through a cooling pipeline to form a circulation loop. The present application connects the outlet of the motor cooling channel 129 to the valve port 5 of the multi-way valve 101, and the inlet of the low-temperature radiator 127 to the valve port 3 of the multi-way valve 101, and uses the multi-way valve 101 to connect the electric drive circuit with other circuits to improve the thermal management effect of the electric drive circuit.

[0048] Based on the above-mentioned new energy vehicle thermal management system, this application can realize multiple thermal management modes, some of which are described below as examples: (1) Hybrid / Extended Range Mode 1: like Figure 2As shown, at this time, the engine participates in the work, and the engine circulation loop participates in the work. For the refrigerant loop, the first refrigerant stop valve 108 is turned on and the second refrigerant stop valve 109 is turned off. The high-temperature and high-pressure refrigerant at the outlet of the compressor 105 is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange in the air-cooled condenser 106. The drying tank 113 stores the excess high-pressure and low-temperature two-phase refrigerant. The high-pressure and low-temperature two-phase refrigerant passing through the drying tank 113 increases the supercooling degree through the second coaxial tube 112. One path is throttled by the second electronic expansion valve 115 to become a low-pressure and low-temperature two-phase refrigerant, which exchanges heat with the passenger compartment air in the evaporator 110 to reduce the temperature of the passenger compartment. The other path is throttled by the first electronic expansion valve 114 to become a low-pressure and low-temperature two-phase refrigerant, which exchanges heat with the battery circuit coolant in the chiller to reduce the battery temperature. After the outlet of the chiller refrigerant side merges with the refrigerant at the outlet of the evaporator 110, it is converted into a low-pressure and low-temperature gaseous superheated refrigerant through the first coaxial tube 111 and returns to the compressor 105 to form a refrigerant circulation loop. In addition, the present application connects the valve ports 6 and 7, the valve ports 3 and 5, the valve ports 2 and 4 of the multi-way valve 101. For the intercooler heat dissipation circuit, after the water-cooled intercooler plate exchanger 122 absorbs the heat of the engine exhaust gas, the medium of the water-cooled intercooler plate exchanger 122 exchanges heat with the water-cooled intercooler plate exchanger 122 to merge the heat into the electric drive circuit to achieve heating of the electric drive circuit; for the electric drive circuit, the coolant at the outlet of the motor cooling flow channel 129 and the intercooler heat dissipation circuit merge and enter the low-temperature radiator 127 through the valve ports 5 and 3 of the multi-way valve 101 to release the heat, forming an electric drive circuit. ; For the battery circuit, the coolant at the water side outlet of the chiller enters the battery cooling channel 103 for heat exchange through the valve ports 2 and 4 of the multi-way valve 101, and the coolant at the outlet of the battery cooling channel 103 passes through the plate heat exchanger 104, the valve ports 6 and 7 of the multi-way valve 101, and returns to the chiller for heat exchange with the refrigerant to form a battery circuit; for the engine circulation circuit, the coolant at the outlet of the engine water jacket 124 passes through the thermostat 125 and exchanges heat with the air at the high-temperature radiator 126, and then returns to the engine water jacket 124 through the engine water pump 123 to form an engine circulation circuit.

[0049] (2) Hybrid / Extended Range Mode 2: like Figure 3As shown, at this time, the engine participates in the work, and the engine circulation loop participates in the work. The present application connects the valve ports 5 and 7, the valve ports 4 and 6, and the valve ports 1 and 2 of the multi-way valve 101. For the electric drive circuit, the coolant enters the valve ports 5 and 7 of the multi-way valve 101 through the motor cooling channel 129 (to absorb heat) and the water-cooled intercooler plate exchanger 122. After passing through the Chiller, it enters the valve ports 2 and 1 of the multi-way valve 101 to form an electric drive circuit, thereby maximizing the utilization of the heat source for electric drive insulation; for the battery circuit, the coolant enters the battery cooling channel 103 for heat exchange, and the coolant at the outlet of the battery cooling channel 103 absorbs heat through the plate heat exchanger 104 The waste heat of the engine is collected and enters the valve ports 6 and 4 of the multi-way valve 101 to form a battery circuit; for the engine circulation circuit, the coolant at the outlet of the engine water jacket 124 passes through the thermostat 125 and exchanges heat with the air at the high-temperature radiator 126, and then returns to the engine water jacket 124 through the engine water pump 123 to form an engine circulation circuit; for the heating circulation circuit, the waste heat of the engine is divided into two branches through the second proportional three-way valve 119 to heat the battery (through the plate heat exchanger 104) and the passenger compartment (through the heater core 116), and then flows through the water-cooled condenser 107 after merging, and finally enters the engine circulation circuit through the first proportional three-way valve 118.

[0050] (3) Pure electric mode: like Figure 4 As shown, the engine is not involved in the work at this time. The present application connects the valve ports 1 and 2, the valve ports 4 and 5, and the valve ports 6 and 7 of the multi-way valve 101. For the refrigerant circuit, the high-temperature and high-pressure refrigerant at the outlet of the compressor 105 is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange in the water-cooled condenser 107. The drying tank 113 stores the excess high-pressure and low-temperature two-phase refrigerant. The high-pressure and low-temperature two-phase refrigerant passing through the drying tank 113 increases the degree of supercooling through the second coaxial tube 112, and then becomes a low-pressure and low-temperature two-phase refrigerant after throttling through the first electronic expansion valve 114. It exchanges heat with the coolant of the electric drive circuit in the chiller, and the refrigerant at the outlet of the chiller is converted into a low-pressure and low-temperature gaseous superheated refrigerant through the first coaxial tube 111 and returns to the compressor 105 to form a refrigerant circuit. For the electric drive circuit and the battery circuit, the coolant at the outlet of the motor cooling channel 129 flows through the valve ports 5 and 4 of the multi-way valve 101 through the battery cooling channel 103 to release heat to the battery cooling channel 103, and then enters the chiller through the valve ports 6 and 7 of the multi-way valve 101 to release heat to the refrigerant, and finally returns to the electric drive circuit through the valve ports 2 and 1 of the multi-way valve 101 to absorb heat, thereby forming an electric drive circuit; for the heating circulation circuit, part of the coolant enters the plate heat exchanger 104 through the second proportional three-way valve 119 to heat the battery cooling channel 103, and the other part enters the heater core 116 through the second proportional three-way valve 119 to exchange heat with the air in the passenger compartment, and then absorbs heat from the refrigerant side through the water-cooled condenser 107 to form a heating circulation circuit for the passenger compartment.

[0051] This application only lists three modes. It should be understood that the new energy vehicle thermal management system provided in this application can be applied to various thermal management models of new energy vehicles, which will not be listed one by one here.

[0052] The present application also provides a new energy vehicle, including: an engine, a motor, a battery, and a new energy vehicle thermal management system of any of the above.

[0053] A new energy vehicle provided by the present application includes a battery circuit, an electric drive circuit, a refrigerant circuit, an intercooler heat dissipation circuit and a multi-way valve; wherein the electric drive circuit is used to realize thermal management of the electric drive system, the battery circuit is used to realize thermal management of the power battery, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, the intercooler heat dissipation circuit is used to dissipate heat from the engine exhaust, the intercooler heat dissipation circuit is arranged in parallel with the electric drive circuit, the multi-way valve 101 connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and the different valve ports of the multi-way valve 101 are switched to connect the battery circuit, the electric drive circuit and the intercooler heat dissipation circuit. and part or all of the refrigerant circuit; that is, by setting a single multi-way valve 101 to connect the battery circuit, electric drive circuit, intercooler heat dissipation circuit and refrigerant circuit, different valve ports of the multi-way valve 101 are switched according to the heat dissipation or heating requirements of various components and spaces of the new energy vehicle, thereby realizing partial or full connectivity of the battery circuit, electric drive circuit, intercooler heat dissipation circuit and refrigerant circuit, and then realizing multiple thermal management modes, efficiently utilizing the energy of the entire vehicle while meeting the thermal management requirements of various components of the new energy vehicle, and reducing the number of valve bodies, thereby reducing the space requirement and complexity of the entire thermal management system.

[0054] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0055] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0056] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0057] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0058] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A thermal management system for new energy vehicles, characterized in that: include: An electric drive circuit, wherein the electric drive circuit is used to achieve thermal management of the electric drive system; A battery circuit, wherein the battery circuit is used to achieve thermal management of the power battery; A refrigerant circuit, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, the refrigerant circuit includes a refrigerant shut-off valve, the refrigerant shut-off valve is used to open or shut off part or all of the refrigerant circuit; An intercooler heat dissipation circuit, the intercooler heat dissipation circuit is used to dissipate heat from the engine exhaust, and the intercooler heat dissipation circuit is arranged in parallel with the electric drive circuit; A multi-way valve; wherein the multi-way valve connects the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit, and switches different valve ports of the multi-way valve to connect part or all of the battery circuit, the electric drive circuit, the intercooler heat dissipation circuit and the refrigerant circuit.

2. The new energy vehicle thermal management system according to claim 1, characterized in that: The battery circuit includes a battery water pump, a battery cooling channel and a cold end of a plate heat exchanger which are connected in sequence; wherein the inlet of the battery water pump is connected to the valve port 4 of the multi-way valve, the cold side outlet of the plate heat exchanger is connected to the valve port 6 of the multi-way valve, and the hot side of the plate heat exchanger is connected to the heating circulation circuit.

3. The new energy vehicle thermal management system according to claim 1, characterized in that: The refrigerant circuit includes a connected compressor, an air-cooled condenser, a water-cooled condenser and a chiller, wherein the air-cooled condenser and the water-cooled condenser are arranged in parallel, and the refrigerant stop valve includes a first refrigerant stop valve and a second refrigerant stop valve, the first refrigerant stop valve is arranged at the air-cooled condenser, and is used to connect or cut off the air-cooled condenser, the second refrigerant stop valve is arranged at the water-cooled condenser, and is used to connect or cut off the water-cooled condenser, and the water side inlet and water side outlet of the chiller are respectively connected to the valve port 7 and valve port 2 of the multi-way valve.

4. The new energy vehicle thermal management system according to claim 3, characterized in that: The refrigerant circuit further includes an evaporator, the inlet of the evaporator is connected to the outlet of the air-cooled condenser and the refrigerant-side outlet of the water-cooled condenser, and the outlet of the evaporator is connected to the inlet of the compressor.

5. The new energy vehicle thermal management system according to claim 3, characterized in that: The new energy vehicle thermal management system also includes: a heating circulation loop, which is used to provide heat to the passenger compartment. The heating circulation loop includes a heater core, and the inlet and outlet of the heater core are respectively connected to the water side outlet and water side inlet of the water-cooled condenser.

6. The new energy vehicle thermal management system according to claim 5, characterized in that: The heating circulation loop also includes a warm air water pump, a PTC, a first proportional three-way valve and a second proportional three-way valve. The first proportional three-way valve connects the water side outlet of the water-cooled condenser, the inlet of the warm air water pump and the engine circulation loop, and the second proportional three-way valve connects the outlet of the warm air water pump, the battery circuit and the inlet of the warm air core.

7. The new energy vehicle thermal management system according to claim 1, characterized in that: The intercooler heat dissipation circuit includes a third proportional three-way valve, an intercooler radiator, and a water-cooled intercooler plate exchanger which are connected in sequence; wherein the outlet of the water-cooled intercooler plate exchanger is connected to the electric drive circuit, and the third proportional three-way valve connects the inlet of the intercooler radiator, the outlet of the intercooler radiator and the electric drive circuit.

8. The new energy vehicle thermal management system according to claim 1, characterized in that: The electric drive circuit includes a low-temperature radiator, a motor water pump and a motor cooling channel which are connected in sequence; wherein the outlet of the motor cooling channel is connected to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator is connected to the valve port 3 of the multi-way valve, and the inlet of the motor water pump is connected to the valve port 1 of the multi-way valve.

9. The new energy vehicle thermal management system according to claim 1, characterized in that: The new energy vehicle thermal management system also includes an engine circulation loop, which is used to dissipate heat from the engine. The engine circulation loop includes an engine water pump, an engine water jacket, a thermostat and a high-temperature radiator connected in sequence; wherein the inlet and outlet of the engine water jacket are both connected to the heating circulation loop, and the connection point between the inlet of the engine water jacket and the heating circulation loop is located upstream of the connection point between the outlet of the engine water jacket and the heating circulation loop.

10. A new energy vehicle, characterized in that: include: An engine, a motor, a battery and a thermal management system for a new energy vehicle as described in any one of claims 1 to 9.

Images