Thermal management system

Abstract

The application provides a heat management system, comprising a refrigerant system and a coolant system, the heat management system comprises a double-flow heat exchanger, the refrigerant system and the coolant system can exchange heat in the double-flow heat exchanger, the coolant system comprises a first valve, a second valve, a radiator, a first branch and a second branch, the second flow channel can be selected to communicate with the first branch through the first valve, and / or the second flow channel can be selected to communicate with the second branch through the second valve; the radiator can communicate with the first valve, the radiator can form a first loop or a part of the first loop with the first branch through the first valve; or the radiator can communicate with the second valve, the radiator can form a second loop or a part of the second loop with the second branch through the second valve. The connection relationship of the components in the heat management system is relatively simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid control, in particular to a thermal management system. BACKGROUND

[0002] The thermal management system can be used for thermal management of vehicle passenger cabin and battery, motor and the like. The thermal management of motor, battery or other components usually adopts a cooling liquid system. It is a common way to adopt a valve with more valve ports to realize system connection. For example, the valve has eight or more valve ports. The valve with more valve ports is relatively complex in design and control. SUMMARY

[0003] The purpose of the present application is to provide a relatively simple thermal management system adopting a valve.

[0004] Embodiments of the present application provide a thermal management system, comprising a refrigerant system and a cooling liquid system, the thermal management system comprising a double-flow heat exchanger, the double-flow heat exchanger comprising a first flow channel and a second flow channel, the first flow channel being part of the refrigerant system, the second flow channel being part of the cooling liquid system, the refrigerant system and the cooling liquid system being capable of heat exchange in the double-flow heat exchanger, the cooling liquid system comprising a first valve, a second valve, a radiator, a first branch and a second branch, the first branch comprising a first pump and a first heat exchanger, the first heat exchanger and the first pump being in series communication; the second branch comprising a second pump and a second heat exchanger, the second pump and the second heat exchanger being in series communication; the second flow channel being capable of being selected to communicate with the first branch through the first valve, and / or the second flow channel being capable of being selected to communicate with the second branch through the second valve; the radiator being capable of communicating with the first valve, the radiator being capable of forming a first loop or part of a first loop with the first branch through the first valve; and / or the radiator being capable of communicating with the second valve, the radiator being capable of forming a second loop or part of a second loop with the second branch through the second valve.

[0005] The thermal management system provided by the embodiments of the present application comprises a first valve, a second valve, a radiator, a first branch and a second branch. The flow direction and flow rate of the cooling liquid in the system are changed by controlling the first valve and the second valve, so as to realize the connection between the first branch, the second branch, the second flow channel and the radiator. Such a thermal management system adopts a relatively simple valve to realize the connection of each branch. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 FIG. 1 is a schematic diagram of the connection of the thermal management system of the present application;

[0007] Figure 2Another connection diagram for the thermal management system of the present application;

[0008] Figure 3 Connection diagram for the thermal management system of the present application when the double-pipe heat exchanger is an evaporator;

[0009] Figure 4 Connection diagram for the thermal management system of the present application when the double-pipe heat exchanger is a condenser;

[0010] Figure 5 First working mode diagram for the thermal management system of the present application;

[0011] Figure 6 Second working mode diagram for the thermal management system of the present application;

[0012] Figure 7 Third working mode diagram for the thermal management system of the present application;

[0013] Figure 8 Third working mode diagram for the thermal management system of the present application including a heater;

[0014] Figure 9 Fourth working mode diagram for the thermal management system of the present application;

[0015] Figure 10 Fifth working mode diagram for the thermal management system of the present application;

[0016] Figure 11 Sixth working mode diagram for the thermal management system of the present application;

[0017] Figure 12 Fifth working mode diagram for the thermal management system of the present application including a heater;

[0018] Figure 13 Initial stage diagram for the seventh working mode of the thermal management system of the present application;

[0019] Figure 14 Second stage diagram for the seventh working mode of the thermal management system of the present application; DETAILED DESCRIPTION

[0020] In connection with Figures 1-4, the heat management system comprises a refrigerant system, a coolant system and a double-flow heat exchanger 10, the double-flow heat exchanger 10 comprises a first flow channel 101 and a second flow channel 102, the first flow channel 101 is part of the refrigerant system, the second flow channel 102 is part of the coolant system, and the refrigerant system and the coolant system can exchange heat in the double-flow heat exchanger 10. The coolant system comprises a first valve 20, a second valve 30, a radiator 13, a first branch 41 and a second branch 42; the first branch 41 and the second branch 42 are connected in parallel, the first branch 41 comprises a first pump 14 and a first heat exchanger 11, wherein the first heat exchanger 11 and the first pump 14 are connected in series; the second branch 42 comprises a second pump 15 and a second heat exchanger 12, wherein the second pump 15 and the second heat exchanger 12 are connected in series. In this embodiment, the first heat exchanger 11 is a battery heat exchanger for adjusting the temperature of the battery; the second heat exchanger 12 is used for adjusting the temperature of the motor, the electronic control and the electronic components; the second flow channel 102 can be selected to communicate with the first branch 41 through the first valve 20, and / or the second flow channel 102 can be selected to communicate with the second branch 42 through the second valve 30; in this way, the coolant flowing through the second flow channel 102 can enter the first heat exchanger 11 to adjust the temperature of the battery, and the coolant in the second flow channel 102 can enter the second heat exchanger 12 to adjust the temperature of the motor, the electronic components, etc. As shown in Figure 2 , the radiator 13 can communicate with the first valve 20, the radiator 13 can form a first loop or part of the first loop with the first branch 41 through the first valve 20, and / or the radiator 13 can communicate with the second valve 30, the radiator 13 can form a second loop or part of the second loop with the second branch 42 through the second valve 30.

[0021] As shown in Figure 3 and Figure 4 , the refrigerant system comprises a first mode and a second mode, in the first mode, the double-flow heat exchanger 10 is a condenser or part of a condenser of the refrigerant system; in the second mode, the double-flow heat exchanger 10 is an evaporator or part of an evaporator of the refrigerant system. In this embodiment, the refrigerant system comprises a compressor 50, a third valve 53, a fourth valve 52 and a third heat exchanger 51, the outlet of the compressor 50 communicates with the first port of the third valve 53, the second port of the third valve 53 communicates with the first flow channel 101, and the third port of the third valve 53 communicates with the inlet of the compressor 50; the first port of the fourth valve 52 communicates with the outlet of the compressor 50, the second port of the fourth valve 52 communicates with the third heat exchanger 51, and the third port of the fourth valve 52 communicates with the inlet of the compressor 50; the second port of the first flow channel 101 and the second port of the third heat exchanger 51 communicate with each other. As shown in Figure 4As shown, in the first mode, when the double-flow heat exchanger 10 works as a condenser, the refrigerant flows back to the compressor through the compressor, the first flow channel, and the third heat exchanger; as shown, in the second mode, when the double-flow heat exchanger 10 works as an evaporator, the refrigerant flows back to the compressor through the compressor, the third heat exchanger, and the first flow channel. It should be noted that the refrigerant system of the present application is not limited to the above refrigerant system, and the above refrigerant system only provides a simple embodiment to illustrate that the double-flow heat exchanger can work as both a condenser and an evaporator, as long as the refrigerant system can achieve the above purpose. Figure 3 As shown, in the second mode, when the double-flow heat exchanger 10 works as an evaporator, the refrigerant flows back to the compressor through the compressor, the third heat exchanger, and the first flow channel. It should be noted that the refrigerant system of the present application is not limited to the above refrigerant system, and the above refrigerant system only provides a simple embodiment to illustrate that the double-flow heat exchanger can work as both a condenser and an evaporator, as long as the refrigerant system can achieve the above purpose.

[0022] It should be noted that the components involved in the present application have two ports, and one of the ports is defined as the first port of the component, and the other port is defined as the second port of the component.

[0023] As shown, in the second mode, when the double-flow heat exchanger 10 works as an evaporator, the refrigerant flows back to the compressor through the compressor, the third heat exchanger, and the first flow channel. It should be noted that the refrigerant system of the present application is not limited to the above refrigerant system, and the above refrigerant system only provides a simple embodiment to illustrate that the double-flow heat exchanger can work as both a condenser and an evaporator, as long as the refrigerant system can achieve the above purpose. Figures 5-12 As shown, in the second mode, when the double-flow heat exchanger 10 works as an evaporator, the refrigerant flows back to the compressor through the compressor, the third heat exchanger, and the first flow channel. It should be noted that the refrigerant system of the present application is not limited to the above refrigerant system, and the above refrigerant system only provides a simple embodiment to illustrate that the double-flow heat exchanger can work as both a condenser and an evaporator, as long as the refrigerant system can achieve the above purpose.

[0024] In this embodiment, the first valve 20 has a first working state, in which the first port 21 of the first valve 20 and the second port 22 of the first valve 20 are communicated, and a second working state, in which the second port 21 of the first valve 20 and the third port 23 of the first valve 20 are communicated. The second valve 30 has three working states, in which the first port 31 of the second valve 30 and the second port 32 of the second valve 30 are communicated in a first working state, the second port 32 of the second valve 30 and the third port 33 of the second valve 30 are communicated in a second working state, and the first port 31, the second port 32 and the third port 33 of the second valve 30 are communicated with each other in a third working state. By setting the working states of the first valve 20 and the second valve 30, the flow direction and the flow rate of the coolant in the system are changed, so that the thermal management system has different working modes.

[0025] The coolant system further comprises temperature sensors, at least two temperature sensors in this embodiment, which are a first temperature sensor 16 and a second temperature sensor 17. The first temperature sensor 16 is located in the first branch 41, one end of the first temperature sensor 16 is connected with the second port of the first heat exchanger 11, the temperature of the coolant flowing out of the first heat exchanger 11 is measured by the first temperature sensor 16, and the opening of the first valve 20 is adjusted according to the temperature value. The second temperature sensor 17 is located in the second branch 42, one end of the second temperature sensor 17 is connected with the second port of the second heat exchanger 12, the temperature of the coolant flowing out of the second heat exchanger 12 is measured by the second temperature sensor 17, and the opening of the second valve 30 is adjusted according to the temperature value. The specific working modes of the thermal management system are as follows:

[0026] As Figure 5As shown, in the first working mode, the first valve 20 in the cooling liquid system is in the second working state, that is, the second port 22 of the first valve 20 is in communication with the third port 23 of the first valve 20, the first branch 41 and the second branch 42 are disconnected, and the first branch 41 is in communication with the third branch 43 to form a loop, that is, in the case that the battery temperature is not high, the water pump and the first heat exchanger 11 can form an independent loop, and the cooling liquid flows in the loop, which mainly balances the temperature of each part of the battery. The second valve 30 is in the third working state, the first port 31 of the second valve 30, the second port 32 of the second valve 30, and the third port 33 of the second valve 30 are in communication with each other, at this time, the second flow channel 102 of the double-flow heat exchanger 10 is in parallel communication with the radiator 13 and in series communication with the second branch 42. In summer high temperature, when the passenger compartment needs to be rapidly cooled or efficiently cooled, the refrigerant system is in the first mode, and a double-condenser mode is adopted, one of which is the double-flow heat exchanger 10, the first flow channel 101 of the double-flow heat exchanger 10 is high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows through the first flow channel 101 to exchange heat with the cooling liquid in the second flow channel 102. After the second pump 15 sucks in the cooling liquid, the cooling liquid flows through the second heat exchanger 12 and is then divided, a part of the cooling liquid releases heat through the radiator 13 to reduce the temperature, and another part of the cooling liquid enters the second flow channel 102 of the double-flow heat exchanger 10, absorbs the heat of the first flow channel 101, and then the temperature becomes high, and then the two parts of the cooling liquid are combined after the second valve 30 to return to the second pump 15 to form a circulation. According to the water temperature of the motor circuit, the flow of the motor heat dissipation circuit is adjusted and controlled through the second valve 30, the motor is cooled at the same time, the refrigerant in the condenser is cooled, and high-efficiency cooling in summer is realized.

[0027] In the second working mode, as shown in FIG. 4, the first valve 20 is in the first working state, that is, the first port 21 of the first valve 20 is in communication with the second port 22 of the first valve 20, and the third port 23 of the first valve 20 is in communication with the second branch 42, and the first branch 41 is disconnected. The second valve 30 is in the first working state, that is, the first port 31 of the second valve 30 is in communication with the second port 32 of the second valve 30, and the third port 33 of the second valve 30 is in communication with the first branch 41, and the second branch 42 is disconnected. At this time, the first flow channel 101 of the double-flow heat exchanger 10 is in parallel communication with the radiator 13 and in series communication with the second branch 42. Figure 6As shown, the first valve 20 is in the first working state, and the second valve 30 is in the third working state, at this time, the first branch 41 and the radiator 13 are in communication, the second branch 42 and the radiator 13 are in communication, the first branch 41, the second branch 42 and the radiator 13 are in parallel communication, realizing that the radiator 13 simultaneously cools the battery and the motor. Specifically, the cooling liquid in the first branch 41, under the driving of the first pump 14, after absorbing the heat of the battery through the first heat exchanger 11, the temperature rises, the relatively high temperature cooling liquid flows through the radiator 13 to be cooled, and then the temperature decreases, the relatively low temperature cooling liquid flows through the third port 33 and the first port 31 of the second valve 30, the first port 21 and the second port 22 of the first valve 20, and then enters the first heat exchanger 11 through the first pump 14 to absorb the heat of the battery, and then cools the battery. The cooling liquid is driven by the second pump 15, and after absorbing the heat of the motor through the second heat exchanger 12, the temperature rises, the relatively high temperature cooling liquid flows through the radiator 13 to be cooled, and then the temperature decreases, the relatively low temperature cooling liquid flows through the third port 33 and the second port 32 of the second valve 30, and then enters the second heat exchanger 12 through the second pump 15 to absorb the heat of the motor, and then cools the motor. The second valve 30 adjusts and controls the flow of the motor cooling circuit according to the temperature of the second temperature sensor 17, that is, the water temperature of the motor circuit. In this mode, the battery and the motor can be cooled through the radiator 13, so that the cooling of the battery no longer depends on the refrigerant system, in spring and autumn, without starting the refrigerant system, the cooling of the motor and the battery can be satisfied, thereby effectively reducing the energy consumption of the whole vehicle. At the same time, the battery does not need to be provided with an independent radiator 13, and only one radiator 13 can realize the cooling of the battery and the motor, which can reduce the complexity of the system and reduce the cost of the system. Furthermore, in this mode, the first branch 41, the second branch 42 and the radiator 13 are in parallel communication, which reduces the flow length of the cooling liquid, thereby reducing the energy loss of the cooling liquid.

[0028] The heat management system is in the third working mode, as shown in Figure 7 As shown, the first valve 20 is in the first working state, and the second valve 30 is in the first working state, the first branch 41 and the second flow channel 102 of the double-flow heat exchanger 10 are in communication to form a loop, and the second branch 42 and the second flow channel 102 of the double-flow heat exchanger 10 are in communication to form a loop.

[0029] In winter or extremely cold environment, the refrigerant system is in the second mode, and the waste heat of the battery and the motor is recovered as a water source heat pump to heat the passenger cabin. Specifically, the first flow channel 101 of the double-flow heat exchanger 10 is low-temperature and low-pressure refrigerant, the cooling liquid of the second flow channel 102 of the double-flow heat exchanger 10 exchanges heat with the refrigerant of the first flow channel 101, and the heat-absorbed refrigerant flows into the condenser of the air conditioning box to release heat to the passenger cabin; the cooling liquid flows out of the first port of the second flow channel 102 of the double-flow heat exchanger 10, and by controlling the first valve 20 and the second valve 30, the flow rate flowing into the first branch 41 and the second branch 42 is controlled, the cooling liquid flows through the first branch 41 to absorb the heat released by the battery, and then returns to the second port of the first flow channel 101 of the double-flow heat exchanger 10 to form a cycle, and the cooling liquid flows through the second branch 42 to absorb the heat released by the motor, and then returns to the second port of the first flow channel 101 of the double-flow heat exchanger 10 to form a cycle.

[0030] The thermal management system is in the fourth working mode, as shown in the figure, the first valve 20 is in the first working state, that is, the first port 21 of the first valve 20 and the second port 22 of the first valve 20 are communicated, at this time the first branch 41 is communicated with the second flow channel 102 of the double-flow heat exchanger 10 to form a loop; the second valve 30 is in the second working state, the second port 32 of the second valve 30 and the third port 33 of the second valve 30 are communicated, and the second branch 42 is communicated with the radiator 13 to form a loop. Figure 9

[0031] In summer, the battery is cooled. Specifically, when the refrigerant system is in the second mode and the double-flow heat exchanger 10 is an evaporator, the first flow channel 101 of the double-flow heat exchanger 10 is low-temperature and low-pressure refrigerant, and when the cooling liquid flows through the second flow channel 102, it exchanges heat with the refrigerant of the first flow channel 101, and then the heat of the cooling liquid is absorbed by the refrigerant, and the relatively low-temperature cooling liquid is driven by the first pump 14 to enter the first heat exchanger 11 through the first port 21 and the second port 22 of the first valve 20, absorbs the heat of the battery, and cools the battery, and then flows back to the second flow channel 102 to realize circulation. In another loop, the cooling liquid absorbs heat from the motor, and then flows through the radiator 13 to dissipate heat, and the cooling liquid is driven by the second pump 15 to return to the motor through the third port 33 and the second port 32 of the second valve 30 to cool the motor. In this mode, the refrigerant system and the cooling liquid system are connected, the refrigerant system realizes refrigeration of the air conditioning system and cooling of the battery, and the motor is communicated with the radiator 13 to be cooled.

[0032] ​In winter, the battery is heated. Specifically, in the first mode of the refrigerant system, when the dual-channel heat exchanger 10 is a condenser, the first channel 101 of the dual-channel heat exchanger 10 contains high-temperature and high-pressure refrigerant. When the coolant flows through the second channel 102, it exchanges heat with the refrigerant in the first channel 101. The coolant absorbs heat, and the relatively high-temperature coolant, driven by the first pump 14, passes through the first port 21 and the second port 22 of the first valve 20 and then enters the first heat exchanger 11. The battery absorbs the heat from the coolant and then flows back to the second channel 102 to achieve circulation, thereby heating the battery.

[0033] like Figure 10 As shown, in the fifth operating mode of the thermal management system, the first valve 20 is in the second operating state, that is, the third port 23 of the first valve 20 is connected to the second port 22 of the first valve 20, the first branch 41 and the second branch 42 are disconnected, and the first branch 41 and the third branch 43 are connected to form a loop. The second valve 30 is in the second operating state, the second port 32 and the third port 33 of the second valve 30 are connected, and the second branch 42 is connected to the radiator 13 to form a loop. After the coolant absorbs heat through the motor, it flows through the radiator 13 to dissipate heat. The cooled coolant, driven by the second pump 15, returns to the motor through the third port and the second port of the second valve 30 to cool the motor. In this mode, during high summer temperatures, the refrigerant system and coolant system are not connected, meaning the refrigerant system operates independently to cool the passenger compartment. The first branch 41 and the third branch 43 form a circulation loop, meaning that when the battery temperature is not high, the water pump and the first heat exchanger 11 can form an independent loop, with coolant flowing in this loop, primarily to equalize the temperature of each part of the battery. The second branch 42 and the radiator 13 form a circulation loop to cool the motor, thereby reducing overall vehicle energy loss.

[0034] like Figure 11 As shown, in the sixth operating mode of the thermal management system, the first valve 20 is in the second operating state, and the first branch 41 and the third branch 43 are connected to form a loop; the second valve 30 is in the first operating state, and the second branch 42 is connected to the second flow channel 102 to form a loop. At this time, the refrigerant system is in the second mode. In the high temperature of summer, it dissipates heat from the motor. The first flow channel 101 of the dual-flow heat exchanger 10 contains low-temperature and low-pressure refrigerant. When the coolant flows through the second flow channel 102, it exchanges heat with the refrigerant in the first flow channel 101. The heat of the coolant is absorbed by the refrigerant. The relatively low-temperature coolant, driven by the second pump 15, enters the second heat exchanger 12 through the first port 31 and the second port 32 of the second valve 30 to absorb the heat of the motor, thereby dissipating heat from the motor and improving the motor's heat dissipation effect.

[0035] In some other embodiments, such as Figure 8 , Figure 12As shown, the coolant system also includes a heater 18, which is connected in series with the first pump 14 and the first heat exchanger 11. One end of the heater 18 is connected to the first heat exchanger 11, and the other end is connected to the second port of the third branch 43 and / or the second port of the second flow channel 102 of the dual-flow heat exchanger 10. Alternatively, the heater 18 can be located between the first pump 14 and the first heat exchanger 11, or between the first pump 14 and the first valve 20, which will not be described in detail here. In the third operating mode, the refrigerant system operates in the second mode, with the battery, motor waste heat, and heat recovery from the heater 18 acting as a water source heat pump to heat the passenger cabin. In the fourth operating mode, the battery and heater 18's heat recovery act as a water source heat pump. In extremely cold conditions, the refrigerant system operates in the second mode. Initially, the heater heats the battery; once the battery reaches normal operating temperature, the battery and heater generate waste heat to act as a water source heat pump. In the fifth operating mode, the battery can be heated in winter.

[0036] In some other embodiments, such as Figure 13 and Figure 14 As shown, one end of heater 18 is connected to the second port of the second flow channel 102, and the other end of heater 18 is connected to the second ports of the first branch 41 and the third branch 43. The thermal management system includes a seventh operating mode. In extremely cold winter conditions, the refrigerant system is in the second mode. In the initial stage, the first valve 20 is in the second operating state, the first branch 41 and the third branch 43 form a loop, the battery self-circulates to generate heat and keep warm, the second valve 30 is in the first operating state, the waste heat of the motor and the heat recovery of the heater act as a heat pump, and the refrigerant in the first flow channel 101 absorbs the heat of the coolant in the second flow channel and transfers it to the passenger compartment. When the battery generates waste heat, the first valve 20 switches to the first operating state, and the waste heat of the battery, the motor and the heat recovery of heater 18 act as a heat pump. Compared with the above-mentioned fourth operating mode where the heat recovery of the battery and heater 18 acts as a water source heat pump, in this mode the waste heat of the motor is not released through the radiator, making more efficient use of the motor's waste heat.

[0037] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A thermal management system comprising a refrigerant system and a coolant system, characterized in that, The heat management system comprises a double-flow heat exchanger (10), the double-flow heat exchanger (10) comprises a first flow channel (101) and a second flow channel (102), the first flow channel (101) is part of the refrigerant system, the second flow channel (102) is part of the coolant system, the refrigerant system and the coolant system can exchange heat in the double-flow heat exchanger (10), the coolant system comprises a first valve (20), a second valve (30), a radiator (13), a first branch (41) and a second branch (42), the first branch (41) comprises a first pump (14), a first heat exchanger (11), the first heat exchanger (11) and the first pump (14) are in series communication; the second branch (42) comprises a second pump (15), a second heat exchanger (12), the second pump (15) and the second heat exchanger (12) are in series communication; the second flow channel (102) can be selected to communicate with the first branch (41) by the first valve (20), and / or the second flow channel (102) can be selected to communicate with the second branch (42) by the second valve (30); The radiator (13) can communicate with the first valve (20), the radiator (13) can form a first loop or part of a first loop with the first branch (41) through the first valve (20); and / or the radiator (13) can communicate with the second valve (30), the radiator (13) can form a second loop or part of a second loop with the second branch (42) through the second valve (30); The first valve (20) is a three-way valve or a three-way proportional valve, a first port (21) of the first valve (20) communicates with a first port of the second flow channel (102), the first port (21) of the first valve (20) communicates with a first port (31) of the second valve (30); a second port (22) of the first valve (20) communicates with a first port of the first branch (41); the coolant system further comprises a third branch (43), a first port of the third branch (43) communicates with a third port (23) of the first valve (20), a second port of the third branch (43) communicates with a second port of the first branch (41), a second port of the radiator (13), a second port of the second branch (42), and a second port of the second flow channel (102).

2. The thermal management system of claim 1, wherein, The refrigerant system comprises a first mode and a second mode, in the first mode, the double-flow heat exchanger (10) is a condenser or part of a condenser of the refrigerant system; in the second mode, the double-flow heat exchanger (10) is an evaporator or part of an evaporator of the refrigerant system.

3. The thermal management system of claim 1, wherein, One port of the heat sink (13) can communicate with one port of the second branch (42) through the second valve (30), another port of the heat sink (13) communicates with another port of the second branch (42), and the other port of the heat sink (13) communicates with the second flow channel (102) and the first branch (41).

4. The thermal management system of any of claims 1-3, wherein, The second valve (30) is a three-way valve or a three-way proportional valve, the first port (31) of the second valve (30) communicates with the first port of the second flow channel (102) of the double-flow heat exchanger (10), the second port (32) of the second valve (30) communicates with the first port of the second branch (42), and the third port (33) of the second valve (30) communicates with the first port of the heat sink (13). The second port of the first branch (41), the second port of the heat sink (13), the second port of the second branch (42), and the second port of the second flow channel (102) are in communication with each other.

5. The thermal management system of claim 4, wherein, The first valve (20) has at least two working states, in the first working state of the first valve (20), the first port (21) of the first valve (20) and the second port (22) of the first valve (20) are in communication, and in the second working state of the first valve (20), the second port (22) of the first valve (20) and the third port (23) of the first valve (20) are in communication. The second valve (30) has at least three working states, in the first working state of the second valve (30), the first port (31) of the second valve (30) and the second port (32) of the second valve (30) are in communication, in the second working state of the second valve (30), the second port (32) of the second valve (30) and the third port (33) of the second valve (30) are in communication, and in the third working state of the second valve (30), the first port (31) of the second valve (30), the second port (32) of the second valve (30), and the third port (33) of the second valve (30) are in communication.

6. The thermal management system of claim 5, wherein, The heat management system has a first working mode, In the first working mode, the first valve (20) is in the second working state, the first branch (41) communicates with the third branch (43) to form a loop, the second valve (30) is in the third working state, and the second flow channel (102) communicates with the heat sink (13) in parallel and then communicates with the second branch (42) in series; The second working mode, in the second working mode, the first valve (20) is in the first working state, the first branch (41) communicates with the heat sink (13) to form a loop, the second valve (30) is in the third working state, and the second branch (42) communicates with the heat sink (13) to form a loop; In the third working mode, the first valve (20) is in the first working state, the first branch (41) and the second flow channel (102) form a loop, the second valve (30) is in the first working state, and the second branch (42) and the radiator (13) form a loop.

7. The thermal management system of claim 6, wherein, In the fourth working mode, the first valve (20) is in the first working state, the first branch (41) and the second flow channel (102) form a loop, the second valve (30) is in the second working state, and the second branch (42) and the radiator (13) form a loop. In the fifth working mode, the first valve (20) is in the second working state, the first branch (41) and the third branch (43) form a loop, and the second valve (30) is in the second working state, and the second branch (42) and the radiator (13) form a loop. In the sixth working mode, the first valve (20) is in the second working state, the first branch (41) and the third branch (43) form a loop, and the second valve (30) is in the first working state, and the second branch (42) and the second flow channel (102) form a loop.

8. The thermal management system of claim 1, wherein, The cooling liquid system further comprises a heater (18), which is in series communication with the first pump (14) and the first heat exchanger (11), one end of the heater (18) is in communication with the first heat exchanger (11), and the other end of the heater (18) is in communication with the second port of the first pump (14) or the second port of the third branch (43) and the second port of the second flow channel (102).

9. The thermal management system of claim 5, wherein, The cooling liquid system further comprises a heater (18), one end of the heater (18) is in communication with the second port of the second flow channel (102), and the other end of the heater (18) is in communication with the second port of the first branch (41) and the second port of the third branch (43).

10. The thermal management system of claim 9, wherein, The thermal management system further comprises a seventh working mode, in which the refrigerant system is in the second mode, in an initial stage, the first valve (20) is in the second working state, the first branch (41) and the third branch (43) form a loop, the second valve (30) is in the first working state, and the second branch (42), the heater (18), and the second flow channel (102) form a loop; in a second stage, the first valve (20) is switched to the first working state, the first branch (41), the heater (18), and the second flow channel (102) form a loop, and the second branch (42), the heater (18), and the second flow channel (102) form a loop.

11. The thermal management system of claim 1, wherein, The heat management system comprises a first temperature sensor (16) and a second temperature sensor (17), the first temperature sensor (16) is located at the cooling liquid outflow end of the first heat exchanger (11), and the second temperature sensor (17) is located at the cooling liquid outflow end of the second heat exchanger (12).

Images