Thermal management system and vehicle

Abstract

The invention relates to a thermal management system and a vehicle. The thermal management system comprises a first radiator, a battery pack, a battery cooler, a first three-way valve and a controller. A cooling liquid outlet of the battery pack is communicated with an inlet of the first radiator through a first flow path, a cooling liquid inlet of the battery pack is communicated with an outlet of the first radiator through a second flow path, and a first heat exchange flow path of the battery cooler is communicated between the first flow path and the second flow path. And a second heat exchange flow path of the battery cooler is communicated in the compression refrigeration subsystem. In addition, the first heat exchange flow path communicates with the first flow path through the first three-way valve, and the controller is in signal connection with the first three-way valve, so that at least one of the first radiator and the battery cooler is used for cooling the battery pack. The first radiator and / or the battery cooler can be selected for heat dissipation when the battery pack is in different heat dissipation working conditions, the cooling mode of the battery pack in the thermal management system is optimized, and the overall energy consumption of the thermal management system is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicle thermal management, in particular, to a thermal management system and a vehicle. BACKGROUND

[0002] When the thermal management system of a hybrid vehicle cools the power battery, the power battery is usually cooled by the air conditioning system and the battery cooler. However, the compressor of the air conditioning system needs to be in a working state all the time when the power battery is cooled by the air conditioning system and the battery cooler. When the temperature of the power battery is high or rapid cooling is needed, the power battery can be rapidly cooled by using the air conditioning system and the battery cooler, achieving a good cooling effect. However, when the temperature of the power battery is moderate or rapid cooling is not needed, the use of the air conditioning system and the battery cooler will cause excessive energy consumption. SUMMARY

[0003] The purpose of the present disclosure is to provide a thermal management system and a vehicle, in which the power battery in the thermal management system can be selectively cooled by a first radiator and / or a battery cooler, and the cooling mode of the battery pack in the thermal management system is optimized to reduce the energy consumption of the overall thermal management system, so as to at least partially solve the above technical problems.

[0004] According to a first aspect of an embodiment of the present disclosure, a thermal management system is provided, comprising a first radiator, a battery pack, a battery cooler, a first three-way valve, and a controller. A cooling liquid outlet of the battery pack is in communication with an inlet of the first radiator through a first flow path, and a cooling liquid inlet of the battery pack is in communication with an outlet of the first radiator through a second flow path. A first heat exchange flow path of the battery cooler is in communication between the first flow path and the second flow path, and a second heat exchange flow path of the battery cooler is in communication in a compression refrigeration subsystem. The first heat exchange flow path is in communication with the first flow path through the first three-way valve, and the controller is in signal connection with the first three-way valve to enable at least one of the first radiator and the battery cooler to be used for cooling of the battery pack.

[0005] Optionally, the thermal management system has a first cooling mode, in which the first three-way valve enables the inlet of the first radiator to be in communication with the cooling liquid outlet of the battery pack, and the first heat exchange flow path is isolated from the first flow path.

[0006] The thermal management system has a third cooling mode, in which the first three-way valve enables the first heat exchange flow path to be in communication with the cooling liquid outlet of the battery pack, and the inlet of the first radiator is isolated from the cooling liquid outlet of the battery pack.

[0007] The heat management system has a fourth cooling mode, in which the first three-way valve makes the inlet of the first radiator and the first heat exchange flow path both communicate with the cooling liquid outlet of the battery pack.

[0008] Optionally, the heat management system further comprises a power driving unit, a four-way valve, and a second radiator, the first three-way valve is arranged between the first heat exchange flow path and the first flow path, the four-way valve is arranged on the first flow path, a first interface of the four-way valve communicates with the cooling liquid outlet of the battery pack, a second interface of the four-way valve communicates with the first three-way valve, a third interface of the four-way valve communicates with the cooling liquid inlet of the power driving unit, a fourth interface of the four-way valve communicates with the outlet end of the second radiator, the inlet end of the second radiator communicates with the cooling liquid outlet of the power driving unit, and the controller is signal connected with the four-way valve.

[0009] The heat management system has a second cooling mode, in which the second interface communicates with the fourth interface, the first interface communicates with the third interface, and the first three-way valve makes the second interface communicate with the first radiator.

[0010] Optionally, the heat management system further comprises a heat exchanger and a heater, the outlet of the heater communicates with the inlet of a third heat exchange flow path of the heat exchanger through a third flow path, the inlet of the heater communicates with the outlet of the third heat exchange flow path of the heat exchanger through a fourth flow path, and a fourth heat exchange flow path of the heat exchanger is connected in series with the first heat exchange flow path of the battery cooler between the first flow path and the second flow path.

[0011] Optionally, the heat management system further comprises an engine, the engine is connected in parallel with the heater between the third flow path and the fourth flow path, a second three-way valve is arranged at the communication position of the outlet of the heater and the third flow path, and the controller is signal connected with the second three-way valve to make at least one of the heater and the engine used for heating the battery pack.

[0012] Optionally, the heat management system has a first heating mode, in which the second three-way valve makes the outlet of the heater communicate with the inlet of the third heat exchange flow path and blocks the communication between the cooling liquid outlet of the engine and the inlet of the third heat exchange flow path.

[0013] The heat management system has a second heating mode, in which the second three-way valve makes the cooling liquid outlet of the engine communicate with the inlet of the third heat exchange flow path and blocks the communication between the outlet of the heater and the inlet of the third heat exchange flow path.

[0014] The heat management system has a third heating mode, in which the second three-way valve causes the coolant outlet of the engine and the outlet of the heater to both communicate with the inlet of the third heat exchange flow path.

[0015] Optionally, the heat management system further comprises a third radiator, which is connected in parallel between the third flow path and the fourth flow path.

[0016] A thermostat is arranged on the third flow path between the connection of the radiator and the third flow path and the connection of the engine and the third flow path, or a thermostat is arranged on the fourth flow path between the connection of the third radiator and the fourth flow path and the connection of the engine and the fourth flow path.

[0017] Optionally, the heat management system further comprises a third three-way valve, a first opening of which communicates with the inlet end of the second radiator, a second opening of which communicates with the coolant outlet of the electric drive unit, an outlet end of the second radiator communicates with the fourth interface of the four-way valve through a fifth flow path, a third opening of the third three-way valve communicates with the fifth flow path, and the controller is signal connected with the third three-way valve to cause at least one of the heater and the engine to heat the battery pack or the battery pack and the electric drive unit.

[0018] Optionally, the heat management system further comprises a controller, and the heat management system has a first heating condition and a second heating condition in the first heating mode, the second heating mode and the third heating mode, in the first heating condition, the fourth interface communicates with the second interface, the first interface communicates with the third interface, the first three-way valve causes the second interface to communicate with the fourth heat exchange flow path of the heat exchanger, and the third three-way valve causes the fourth interface to communicate with the coolant outlet of the electric drive unit.

[0019] In the second heating condition, the first interface communicates with the second interface, and the third interface communicates with the fourth interface, and the first three-way valve causes the second interface to communicate with the fourth heat exchange flow path of the heat exchanger.

[0020] According to a second aspect of the present disclosure, a vehicle is provided, which comprises the heat management system described above.

[0021] By the technical scheme, the cooling liquid outlet of the battery pack in the heat management system is communicated with the inlet of the first radiator through the first flow path, the cooling liquid inlet of the battery pack is communicated with the outlet of the first radiator through the second flow path, the second heat exchange flow path of the battery cooler is communicated in the compression refrigeration subsystem, the first heat exchange flow path of the battery cooler is communicated between the first flow path and the second flow path, and the first heat exchange flow path is communicated with the first flow path through the first three-way valve, the controller is signal connected with the first three-way valve, and the controller controls the first three-way valve to make at least one of the first radiator and the battery cooler used for cooling of the battery pack, so that the first radiator and / or the battery cooler can be selected for heat dissipation when the battery pack is in different heat dissipation working conditions, the way of cooling the battery pack in the heat management system is optimized, and the energy consumption of the whole heat management system is reduced.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0024] Figure 1 is a working principle diagram of the heat management system provided in the exemplary embodiment of the present disclosure;

[0025] Figure 2 is a working principle diagram of the heat management system provided in the exemplary embodiment of the present disclosure; wherein the heat management system is in a first cooling mode, the thick solid lines and arrows in the figure represent the flow path of the cooling liquid in this mode;

[0026] Figure 3 is a working principle diagram of the heat management system provided in the exemplary embodiment of the present disclosure; wherein the heat management system is in a second cooling mode, the thick solid lines and arrows in the figure represent the flow path of the cooling liquid in this mode;

[0027] Figure 4 is a working principle diagram of the heat management system provided in the exemplary embodiment of the present disclosure; wherein the heat management system is in a third cooling mode, the thick solid lines and arrows in the figure represent the flow path of the cooling liquid in this mode;

[0028] Figure 5 is a working principle diagram of the heat management system provided in the exemplary embodiment of the present disclosure; wherein the heat management system is in a fourth cooling mode, the thick solid lines and arrows in the figure represent the flow path of the cooling liquid in this mode;

[0029] Figure 6is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a first heating working condition under a first heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode;

[0030] Figure 7 is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a first heating working condition under a second heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode;

[0031] Figure 8 is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a first heating working condition under a third heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode;

[0032] Figure 9 is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a second heating working condition under a first heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode;

[0033] Figure 10 is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a second heating working condition under a second heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode;

[0034] Figure 11 is a working principle diagram of a thermal management system provided in the exemplary embodiments of the present disclosure; wherein the thermal management system is in a second heating working condition under a third heating mode, the thick solid lines and arrows in the diagram represent the flow path of the coolant under the mode.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 11 - battery pack; 12 - first temperature sensor; 13 - first water pump; 14 - first radiator; 15 - first three-way valve; 16 - four-way valve; 17 - second temperature sensor; 18 - battery cooler; 181 - first heat exchange flow path; 182 - second heat exchange flow path; 21 - electric power driving unit; 211 - second water pump; 212 - motor controller; 213 - hybrid box; 22 - third temperature sensor; 23 - third three-way valve; 24 - second radiator; 31 - first thermal expansion valve; 32 - first air conditioning stop valve; 33 - three-state pressure switch; 34 - condenser; 35 - compressor; 36 - first evaporator; 37 - second evaporator; 38 - second thermal expansion valve; 39 - second air conditioning stop valve; 301 - pressure temperature sensor; 302 - electronic expansion valve; 41 - heater; 42 - third water pump; 43 - third radiator; 44 - thermostat; 45 - second three-way valve; 46 - first heater core; 47 - first heater stop valve; 48 - engine; 49 - fourth water pump; 51 - fourth temperature sensor; 52 - second heater core; 53 - heat exchanger; 531 - third heat exchange flow path; 532 - fourth heat exchange flow path; 54 - regulating valve;

[0037] 1a - first flow path; 1b - second flow path; 2a - third flow path; 2b - fourth flow path; 3a - fifth flow path;

[0038] A - first interface; B - second interface; C - third interface; D - fourth interface; E - first valve port; F - second valve port; G - third valve port; H - first through port; I - second through port; J - third through port; K - first opening; L - second opening; M - third opening. DETAILED DESCRIPTION

[0039] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0040] Reference Figures 1 to 11As shown, the first aspect of the present disclosure provides a thermal management system, comprising a first radiator 14, a battery pack 11, a battery cooler 18, a first three-way valve 15 and a controller. Wherein the cooling liquid outlet of the battery pack 11 is communicated with the inlet of the first radiator 14 through a first flow path 1a, the cooling liquid inlet of the battery pack 11 is communicated with the outlet of the first radiator 14 through a second flow path 1b, the first heat exchange flow path 181 of the battery cooler 18 is communicated between the first flow path 1a and the second flow path 1b, and the second heat exchange flow path 182 of the battery cooler 18 is communicated in a compression refrigeration subsystem. In addition, the first heat exchange flow path 181 is communicated with the first flow path 1a through the first three-way valve 15, and the controller is signal connected with the first three-way valve 15 to make at least one of the first radiator 14 and the battery cooler 18 used for cooling the battery pack 11. The first radiator 14 and / or the battery cooler 18 can be selected for heat dissipation at the battery pack 11 under different heat dissipation working conditions, the way of cooling the battery pack 11 in the thermal management system is optimized, and the energy consumption of the whole thermal management system is reduced.

[0041] It should be noted that the compression refrigeration subsystem can be an air conditioning refrigeration system of a vehicle. The compression refrigeration subsystem further comprises a compressor 35, a condenser 34, a three-state pressure switch 33, a first evaporator 36, a second evaporator 37, a first air conditioning stop valve 32, a second air conditioning stop valve 39, a first thermal expansion valve 31 and a second thermal expansion valve 38.

[0042] In the compression refrigeration subsystem, the first evaporator 36 and the second evaporator 37 are arranged in the front air conditioning box and the rear air conditioning box of the vehicle passenger cabin, respectively, for cooling the passenger cabin. The first evaporator 36, the second evaporator 37 and the battery cooler 18 are connected in parallel with each other and are connected in series with the compressor 35 and the condenser 34, respectively. The cooling liquid is divided into three branches after the compressor 35, the condenser 34 and the three-state pressure switch 33, and is communicated with the first evaporator 36, the second evaporator 37 and the second heat exchange flow path 182 of the battery cooler 18, respectively. The first air conditioning stop valve 32 and the first thermal expansion valve 31 are arranged on the branch connected with the first evaporator 36, and the first air conditioning stop valve 32 can be used to control the on-off of the branch connected with the first evaporator 36 in the compression cooling subsystem. The second air conditioning stop valve 39 and the second thermal expansion valve 38 are arranged on the branch connected with the second evaporator 37, and the second air conditioning stop valve 39 can be used to control the on-off of the branch connected with the second evaporator 37 in the compression cooling subsystem. The electronic expansion valve 302 is arranged on the branch connected with the second heat exchange flow path 182 of the battery cooler 18 in the compression cooling subsystem, and the electronic expansion valve 302 can convert the cooling liquid from the condenser 34 to the second heat exchange flow path of the battery cooler 18 into low-temperature and low-pressure cooling liquid. The pressure temperature sensor 301 is also arranged on the branch connected with the second heat exchange flow path 182 of the battery cooler 18, and the pressure temperature sensor 301 is located between the battery cooler 18 and the compressor 35. The pressure temperature sensor 301 is used to monitor the temperature of the cooling liquid flowing out of the second heat exchange flow path 182 of the battery cooler 18, and can monitor the pressure value of the branch connected with the second heat exchange flow path 182 of the battery cooler 18. In addition, the three-state pressure switch 33 can protect the compression refrigeration subsystem, which will not be described here.

[0043] It should be understood that the first heat sink 14 can be an air-cooled heat sink, and the heat of the battery pack 11 is dissipated to the external environment through the first heat sink 14. The cooling liquid in the compression cooling subsystem is a refrigerant.

[0044] In some embodiments, as shown in Figure 1 The first valve port E of the first three-way valve 15 is connected with the first heat exchange flow path 181 of the battery cooler 18, the second valve port F of the first three-way valve 15 is connected with the first heat sink 14, and the third valve port G of the first three-way valve 15 is connected with the cooling liquid outlet of the battery pack 11. As described above, the controller is signal connected with the first three-way valve 15, and the controller controls the action of the first three-way valve 15 to make at least one of the first heat sink 14 and the battery cooler 18 used for cooling the battery pack 11, so that the thermal management system has a first cooling mode, a third cooling mode and a fourth cooling mode.

[0045] In the first cooling mode, as shown in Figure 2As shown, the first three-way valve 15 connects the inlet of the first radiator 14 with the coolant outlet of the battery pack 11 and disconnects the first heat exchange flow path 181 from the first flow path la. That is, in the first cooling mode, the second valve port F of the first three-way valve 15 is connected with the third valve port G of the first three-way valve 15, and the third valve port G of the first three-way valve 15 is disconnected with the first valve port E of the first three-way valve 15, so that the coolant outlet of the battery pack 11 is connected with the inlet of the first radiator 14, and the coolant in the battery pack 11 flows through the first radiator 14 for heat dissipation and then flows back to the battery pack 11. When the heat of the battery pack 11 is moderate or does not need to be quickly cooled, the heat management system can be in the first cooling mode. The connection path of the related devices in the system and the flow path of the coolant in the first cooling mode of the heat management system will be described in detail below, and will not be described here.

[0046] In the third cooling mode, as shown in FIG. 3, the first three-way valve 15 connects the first heat exchange flow path 181 with the coolant outlet of the battery pack 11 and disconnects the inlet of the first radiator 14 from the coolant outlet of the battery pack 11. That is, in the third cooling mode, the second valve port F of the first three-way valve 15 is disconnected with the third valve port G of the first three-way valve 15, and the third valve port G of the first three-way valve 15 is connected with the first valve port E of the first three-way valve 15, so that the coolant outlet of the battery pack 11 is connected with the first heat exchange flow path 181 of the battery cooler 18, and the coolant in the battery pack 11 flows through the first heat exchange flow path 181 for heat dissipation and then flows back to the battery pack 11. When the heat of the battery pack 11 is high or the heat of the battery pack 11 rises rapidly, the heat management system can be in the third cooling mode. The connection path of the related devices in the system and the flow path of the coolant will be described in detail below, and will not be described here. Figure 4 In the fourth cooling mode, as shown in FIG. 4, the first three-way valve 15 connects the inlet of the first radiator 14 and the first heat exchange flow path 181 with the coolant outlet of the battery pack 11. That is, in the fourth cooling mode, the third valve port G of the first three-way valve 15 is connected with the first valve port E and the second valve port F of the first three-way valve 15, so that the coolant outlet of the battery pack 11 is connected with the first heat exchange flow path 181 of the battery cooler 18 and the inlet of the first radiator 14 at the same time, and the coolant in the battery pack 11 flows through the first heat exchange flow path 181 and the first radiator 14 for heat dissipation and then flows back to the battery pack 11. When the heat of the battery pack 11 is not enough to cool the battery pack 11 to the preset temperature range only by the first radiator 14, and needs to be shared by the battery cooler 18, the heat management system can be in the fourth cooling mode. The connection path of the related devices in the system and the flow path of the coolant will be described in detail below, and will not be described here.

[0047] Figure 5 ​​

[0048] It should be understood that the thermal management system further comprises a first water pump 13, as Figure 1 As shown, the first water pump 13 can be arranged in the second flow path 1b, and the first water pump 13 is located on the flow path between the communication of the first heat exchange flow path 181 of the battery cooler 18 to the first flow path 1a and the battery pack 11 cooling liquid outlet.

[0049] Alternatively, in other possible embodiments, the first water pump 13 can be arranged in the first flow path 1a, and the first water pump 13 is located between the first three-way valve 15 and the battery pack 11 cooling liquid outlet. The first water pump 13 can provide power for the cooling liquid, so that the cooling liquid can circulate between at least one of the first heat exchange flow path 181 in the first radiator 14 and the battery cooler 18 and the battery pack 11. For example, the first water pump 13 can circulate the cooling liquid between the first radiator 14 and the battery pack 11; or the first water pump can circulate the cooling liquid between the first heat exchange flow path 181 in the battery cooler 18 and the battery pack 11; or the first water pump can circulate the cooling liquid between the battery pack 11 and the first heat exchange flow path 181 in the battery cooler 18 and between the battery pack 11 and the first radiator 14.

[0050] In some embodiments, the first water pump 13 is connected with a controller signal, and the controller can be used to control the operation of the first water pump 13. The first three-way valve 15 can be configured as a three-way proportional regulating valve.

[0051] In addition, in other possible embodiments, the first three-way valve 15 can also be arranged between the first heat exchange flow path 181 and the second flow path 1b, the first valve port E of the first three-way valve 15 is communicated with the first heat exchange flow path 181 of the battery cooler 18, the second valve port F of the first three-way valve 15 is communicated with the battery pack 11 cooling liquid inlet, and the third valve port G of the first three-way valve 15 is communicated with the outlet of the first radiator 14. At this time, the first water pump 13 can be arranged on the flow path between the first three-way valve 15 and the battery pack 11 cooling liquid inlet; or arranged on the flow path between the communication of the first heat exchange flow path 181 of the battery cooler 18 to the first flow path 1a and the battery pack 11 cooling liquid outlet.

[0052] In some embodiments, the thermal management system further comprises the electric drive unit 21, the four-way valve 16, the second radiator 24, the first heat exchange flow path 181 is communicated with the first flow path la through the first three-way valve 15, the four-way valve 16 is arranged on the first flow path la, the first interface A of the four-way valve 16 is communicated with the coolant outlet of the battery pack 11, the second interface B of the four-way valve 16 is communicated with the first three-way valve 15, the third interface C of the four-way valve 16 is communicated with the coolant inlet of the electric drive unit 21, the fourth interface D of the four-way valve 16 is communicated with the outlet end of the second radiator 24, and the inlet end of the second radiator 24 is communicated with the coolant outlet of the electric drive unit 21. Wherein, the third temperature sensor 22 can be arranged at the coolant inlet of the electric drive unit 21 to monitor the temperature of the coolant entering the electric drive unit 21.

[0053] Wherein, the controller is signal connected with the first three-way valve 15 and the four-way valve 16 respectively, so that the thermal management system has a second cooling mode, in the second cooling mode, the second interface B is communicated with the fourth interface D, and the first interface A is communicated with the third interface C. In addition, the third valve port G of the first three-way valve 15 is communicated with the second interface B, and the second valve port F of the first three-way valve 15 is communicated with the first radiator 14, so that the second interface B is communicated with the first radiator 14. So that the first water pump 13, the battery pack 11, the four-way valve 16 first interface A, the four-way valve 16 third interface C, the electric drive unit 21, the second radiator 24, the four-way valve 16 fourth interface D, the four-way valve 16 second interface B, the first three-way valve 15 third valve port G, the first three-way valve 15 second valve port F, the inlet of the first radiator 14 are communicated in turn, and the outlet of the first radiator 14 is communicated with the first water pump 13, to form a loop.

[0054] The electric drive unit 21 can comprise: a second water pump 211, a motor controller 212, a hybrid box 213. In the second cooling mode, as Figure 3As shown, the flow path of the coolant in the thermal management system is: the battery pack 11, the first interface A of the four-way valve 16, the third interface C of the four-way valve 16, the second water pump 211 of the electric drive unit 21, the motor controller 212, the hybrid box 213, the second radiator 24, the fourth interface D of the four-way valve 16, the second interface B of the four-way valve 16, the third valve port G of the first three-way valve 15, the second valve port F of the first three-way valve 15, the first radiator 14, the first water pump 13, the battery pack 11. In the second cooling mode, the first radiator 14 and the second radiator 24 are connected in series, and the battery pack 11 can be cooled by the series-connected first radiator 14 and second radiator 24, increasing the heat dissipation area of the radiator and improving the heat dissipation efficiency. Among them, the second cooling mode of the thermal management system can be used when the vehicle is parked and powered on, at this time, the vehicle does not run, and the hybrid box 213 of the electric drive unit 21 does not run, and the battery pack 11 can be cooled by the first radiator 14 and the second radiator 24 at the same time, thereby better cooling the battery pack 11, reducing or even avoiding the intervention of the compressor 35 of the compression refrigeration subsystem.

[0055] In some embodiments, as described above, the thermal management system also has a first cooling mode. The communication path of the related devices in the system and the flow path of the coolant in the first cooling mode are described in the presence of the four-way valve 16. In the first cooling mode, the controller controls the first three-way valve 15 and the four-way valve 16, so that the first interface A of the four-way valve 16 is in communication with the second interface B of the four-way valve 16, and the third interface C of the four-way valve 16 is in communication with the fourth interface D of the four-way valve 16. In addition, in this cooling mode, the third valve port G of the first three-way valve 15 is in communication with the second valve port F, so that the coolant outlet of the battery pack 11 is in communication with the inlet of the first radiator 14. To cool the battery pack 11 by the first radiator 14. In this cooling mode, as shown, Figure 2 As shown, the flow path of the coolant in the thermal management system is: the battery pack 11, the first interface A of the four-way valve 16, the third interface C of the four-way valve 16, the second water pump 211 of the electric drive unit 21, the motor controller 212, the hybrid box 213, the second radiator 24, the fourth interface D of the four-way valve 16, the second interface B of the four-way valve 16, the third valve port G of the first three-way valve 15, the second valve port F of the first three-way valve 15, the first radiator 14, the first water pump 13, the battery pack 11. In the second cooling mode, the first radiator 14 and the second radiator 24 are connected in series, and the battery pack 11 can be cooled by the series-connected first radiator 14 and second radiator 24, increasing the heat dissipation area of the radiator and improving the heat dissipation efficiency. Among them, the second cooling mode of the thermal management system can be used when the vehicle is parked and powered on, at this time, the vehicle does not run, and the hybrid box 213 of the electric drive unit 21 does not run, and the battery pack 11 can be cooled by the first radiator 14 and the second radiator 24 at the same time, thereby better cooling the battery pack 11, reducing or even avoiding the intervention of the compressor 35 of the compression refrigeration subsystem.

[0056] In some embodiments, as described above, the thermal management system has a third cooling mode. The communication paths of the relevant devices in the system and the flow path of the coolant in the third cooling mode are described with the introduction of the four-way valve 16. In the third cooling mode, the controller controls the first three-way valve 15 and the four-way valve 16, so that the first port A of the four-way valve 16 communicates with the second port B of the four-way valve 16, and the third port C of the four-way valve 16 communicates with the fourth port D of the four-way valve 16. In addition, in this cooling mode, the third port G of the first three-way valve 15 communicates with the first port E, so that the battery pack 11 coolant outlet communicates with the first heat exchange flow path 181 of the battery cooler 18, so as to cool the battery pack 11 through the battery cooler 18 and the compression cooling subsystem. In this cooling mode, as shown in FIG. 6, the flow path of the battery pack 11 coolant is: the battery pack 11, the battery pack 11 coolant outlet, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third port G of the first three-way valve 15, the first port E of the first three-way valve 15, the first heat exchange flow path 181 of the battery cooler 18, the first water pump 13, the coolant inlet of the battery pack 11, and the battery pack 11. Figure 4

[0057] In some embodiments, as described above, the thermal management system has a third cooling mode. The communication paths of the relevant devices in the system and the flow path of the coolant in the third cooling mode are described with the introduction of the four-way valve 16. In the third cooling mode, the controller controls the first three-way valve 15 and the four-way valve 16, so that the first port A of the four-way valve 16 communicates with the second port B of the four-way valve 16, and the third port C of the four-way valve 16 communicates with the fourth port D of the four-way valve 16. In addition, in this cooling mode, the third port G of the first three-way valve 15 communicates with the first port E, so that the battery pack 11 coolant outlet communicates with the first heat exchange flow path 181 of the battery cooler 18, so as to cool the battery pack 11 through the battery cooler 18 and the compression cooling subsystem. In this cooling mode, as shown in FIG. 6, the flow path of the battery pack 11 coolant is: the battery pack 11, the battery pack 11 coolant outlet, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third port G of the first three-way valve 15, the first port E of the first three-way valve 15, the first heat exchange flow path 181 of the battery cooler 18, the first water pump 13, the coolant inlet of the battery pack 11, and the battery pack 11. Figure 5 ​As shown, the controller controls the first three-way valve 15 and the four-way valve 16 to operate so that the first port A of the four-way valve 16 communicates with the second port B, the third port C communicates with the fourth port D, and the third port G of the first three-way valve 15 respectively communicates with the first port E and the second port F. The first three-way valve 15 is configured as a three-way proportional valve. In this cooling mode, the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the second port B of the four-way valve 16, and the third port G of the first three-way valve 15 are sequentially communicated, and then the third port G of the first three-way valve 15 respectively communicates with the first port E and the second port F of the first three-way valve 15 to form two branches. The branch communicating with the first port E communicates with the first water pump 13 through the first heat exchange flow path 181 of the battery cooler 18, and the branch communicating with the second port F communicates with the first water pump 13 through the first radiator 14, and the first water pump 13 further communicates with the cooling liquid inlet of the battery pack 11 to form a loop. In this cooling mode, the cooling liquid in the battery pack 11 flows in the loop to cool the battery pack 11 through the first radiator 14, the battery cooler 18, and the compression cooling subsystem. This mode can be applied when the cooling capacity of the first radiator 14 is insufficient to cool the battery pack 11 to the preset temperature range, and the battery cooler 18 and the compression cooling subsystem can be used to share part of the pressure. At this time, the compressor 35 in the compression cooling subsystem can work at a smaller power to reduce the energy consumption of the thermal management system. It should be noted that the compressor 35 can be powered by the battery or the engine 48.

[0058] In some embodiments, a first temperature sensor 12 can be arranged at the cooling liquid inlet of the battery pack 11, and a second temperature sensor 17 can be arranged at the cooling liquid outlet of the battery pack 11. The second temperature sensor 17 is used to monitor the temperature of the cooling liquid flowing out of the battery pack 11, and the first temperature sensor 12 is used to monitor the temperature of the cooling liquid flowing into the battery pack 11 after being circulated and cooled. Both the first temperature sensor 12 and the second temperature sensor 17 are signal-connected to the controller. The first three-way valve 15 is a three-way proportional regulating valve, and the controller can adjust the opening of the first three-way valve 15 according to the temperature data fed back by the first temperature sensor 12 and the second temperature sensor 17, so as to adjust the flow rate of the cooling liquid flowing out of the battery pack 11 and flowing into the first radiator 14 and / or the first heat exchange flow path 181 of the battery cooler 18 through the first three-way valve 15, and further change the cooling efficiency of the battery pack 11.

[0059] In some embodiments, the thermal management system also includes a heat exchanger 53 and a heater 41, the outlet of the heater 41 is connected to the inlet of the third heat exchange flow path 531 of the heat exchanger 53 through the third flow path 2a, the inlet of the heater 41 is connected to the outlet of the third heat exchange flow path 531 of the heat exchanger 53 through the fourth flow path 2b, and the fourth heat exchange flow path 532 of the heat exchanger 53 and the first heat exchange flow path 181 of the battery cooler 18 are connected in series between the first flow path 1a and the second flow path 1b.

[0060] In the above embodiment, the fourth heat exchange flow path 532 of the heat exchanger 53 and the first heat exchange flow path 181 of the battery cooler 18 are connected in series between the first flow path 1a and the second flow path 1b. Specifically, one end of the fourth heat exchange flow path 532 of the heat exchanger 53 is connected in series with one end of the first heat exchange flow path 181 of the battery cooler 18, and the other end of the fourth heat exchange flow path 532 is connected to one of the first flow path 1a and the second flow path 1b, and the first heat exchange flow path 181 is connected to the other.

[0061] like Figure 1 As shown, one end of the fourth heat exchange flow path 532 of the heat exchanger 53 is connected in series with one end of the first heat exchange flow path 181 of the battery cooler 18. The other end of the fourth heat exchange flow path 532 is connected to the second flow path 1b. The other end of the first heat exchange flow path 181 is connected to the first three-way valve 15. Specifically, the other end of the first heat exchange flow path 181 is connected to the first valve port E of the first three-way valve 15. For ease of understanding, this can also be expressed as follows. In the above, it is mentioned that the first heat exchange flow path 181 of the battery cooler 18 is connected between the first flow path 1a and the second flow path 1b. The fourth heat exchange flow path 532 of the heat exchanger 53 is arranged on the flow path where the first heat exchange flow path 181 connects to the second flow path 1b, so that the first heat exchange flow path 181 of the battery cooler 18 and the fourth heat exchange flow path 532 of the heat exchanger 53 are connected in series.

[0062] In some embodiments, the thermal management system includes an engine 48, which is connected in parallel with the heater 41 between the third flow path 2a and the fourth flow path 2b. A second three-way valve 45 is provided at the connection between the outlet of the heater 41 and the third flow path 2a. A controller is signal-connected to the second three-way valve 45 to enable at least one of the heater 41 and the engine 48 to heat the battery pack 11.

[0063] A fourth water pump 49 is provided between the engine coolant inlet and the fourth flow path 2b or between the engine coolant outlet and the third flow path 2a.

[0064] In the above-mentioned embodiments, the controller is in signal connection with the second three-way valve 45, and can make at least one of the heater 41 and the engine 48 heat the coolant in the third heat exchange flow path 531 of the heat exchanger 53, so that the thermal management system has a first heating mode, a second heating mode and a third heating mode.

[0065] In the first heating mode, the controller controls the second three-way valve 45 to act, so that the outlet of the heater 41 is in communication with the inlet of the third heat exchange flow path 531, and the communication between the coolant outlet of the engine 48 and the inlet of the third heat exchange flow path 531 is blocked. In this heating mode, the coolant in the third heat exchange flow path 531 of the heat exchanger 53 can be heated by the heater 41.

[0066] In the second heating mode, the second three-way valve 45 makes the coolant outlet of the engine 48 in communication with the inlet of the third heat exchange flow path 531, and blocks the communication between the outlet of the heater 41 and the inlet of the third heat exchange flow path 531. In this heating mode, the coolant in the third heat exchange flow path 531 of the heat exchanger 53 can be heated by the engine 48.

[0067] In the third heating mode, the second three-way valve 45 makes the coolant outlet of the engine 48 and the outlet of the heater 41 both in communication with the inlet of the third heat exchange flow path 531. In this heating mode, the coolant in the third heat exchange flow path 531 of the heat exchanger 53 can be heated by the engine 48 and the heater 41 at the same time.

[0068] In some embodiments, the thermal management system further comprises a third radiator 43, which is connected in parallel between the third flow path 2a and the fourth flow path 2b, and a thermostat 44 is arranged on the third flow path 2a between the connection of the third radiator 43 and the third flow path 2a and the connection of the engine 48 and the third flow path 2a; or a thermostat 44 is arranged on the fourth flow path 2b between the connection of the third radiator 43 and the fourth flow path 2b and the connection of the engine 48 and the fourth flow path 2b.

[0069] It should be noted that the engine 48 and the system in which the heater 41 is located can be defined as a heating subsystem, which further includes the first heater core 46 and the second heater core 52. The first heater core 46, the second heater core 52 and the third heat exchange flow path 531 of the heat exchanger 53 are in parallel with each other, the first heater core 46, the second heater core 52 and the heat exchanger 53 are in series with the engine 48, and the first heater core 46, the second heater core 52 and the heat exchanger 53 are in series with the heater 41. The first heater core 46 is arranged in the first air conditioning box, and the second heater core 52 is arranged in the second air conditioning box. The first heater core 46 and the second heater core 52 are used for heating in the vehicle passenger compartment. The first heater core 46 is arranged on a branch for connecting the third flow path 2a and the fourth flow path 2b, and the first heater core 46 is used for regulating the flow of the cooling liquid passing through the second heater core 52. The third flow path 2a and the fourth flow path 2b are connected to the third flow path 2a of the heat exchanger 53, and the third flow path 2a of the heat exchanger 53 is used for regulating the flow of the cooling liquid passing through the third flow path 2a of the heat exchanger 53. In addition, the fourth temperature sensor 51 is arranged at the cooling liquid outlet of the engine 48, which is used for monitoring the temperature of the cooling liquid output by the cooling liquid outlet of the engine 48. The cooling liquid output by the cooling liquid outlet of the engine 48 is usually water. The heater 41 can be an electric heater.

[0070] In some embodiments, the thermal management system further includes a third three-way valve 23, a first opening K of the third three-way valve 23 is connected to the inlet end of the second radiator 24, a second opening L of the third three-way valve 23 is connected to the cooling liquid outlet of the electric drive unit 21, the outlet end of the second radiator 24 is connected to the fourth interface D of the four-way valve 16 through a fifth flow path 3a, and a third opening M of the third three-way valve 23 is connected to the fifth flow path 3a. The controller is signal connected with the third three-way valve 23, so that at least one of the heater 41 and the engine 48 is used for heating the battery pack 11 or the battery pack 11 and the electric drive unit 21.

[0071] In the above-mentioned embodiments, specifically, the controller is signal connected with the first three-way valve 15, the second three-way valve 45, the third three-way valve 23 and the four-way valve 16 respectively, so that at least one of the heater 41 and the engine 48 is used for heating the battery pack 11; or at least one of the heater 41 and the engine 48 is used for heating the battery pack 11 and the electric drive unit 21, so that the thermal management system has the first heating working condition and the second heating working condition in the first heating mode, the second heating mode and the third heating mode.

[0072] In the first heating mode, the fourth port D of the four-way valve 16 is connected to the second port B, and the first port A is connected to the third port C. The first three-way valve 15 connects the second port B of the four-way valve 16 to the fourth heat exchange path 532 of the heat exchanger 53. The third three-way valve 23 connects the fourth port D to the coolant outlet of the electric drive unit 21. In the first heating mode, the battery pack 11 and the electric drive unit 21 are connected in series, and at least one of the heater 41 and the engine 48 is used to heat the battery pack 11 and the electric drive unit 21.

[0073] In the second heating mode, the first port A of the four-way valve 16 is connected to the second port B, and the third port C is connected to the fourth port D. The first three-way valve 15 connects the second port B of the four-way valve 16 to the fourth heat exchange path 532 of the heat exchanger 53. In the second heating mode, at least one of the heater 41 and the engine 48 is used to heat the battery pack 11.

[0074] The following describes in detail the communication paths of the relevant devices in the thermal management system when the thermal management system is in the first heating state and the second heating state. Among them, the controller is respectively connected to the first three-way valve 15, the second three-way valve 45, the third three-way valve 23 and the four-way valve 16.

[0075] The first heating mode, the second heating mode and the third heating mode all have a first working condition, such as Figure 6 、 Figure 7 、 Figure 8 As shown, in the first heating condition, the controller controls the four-way valve 16 to operate so that the fourth port D of the four-way valve 16 is connected to the second port B, and the first port A is connected to the third port C. The controller controls the first three-way valve 15 to operate so that the second port B is connected to the fourth heat exchange flow path 532 of the heat exchanger 53. The controller controls the third three-way valve 23 to operate so that the third three-way valve 23 connects the fourth port D to the coolant outlet of the electric drive unit 21. In the first heating condition, the battery pack 11 and the electric drive unit 21 are in a series relationship. The battery pack 11, the coolant outlet of the battery pack 11, the first interface A of the four-way valve 16, the third interface C of the four-way valve 16, the second water pump 211 of the electric drive unit 21, the motor controller 212, the hybrid box 213, the second opening L of the third three-way valve 23, the third opening M of the third three-way valve 23, the fourth interface D of the four-way valve 16, the second interface B of the four-way valve 16, the third valve port G of the first three-way valve 15, the first valve port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, and the coolant inlet of the battery pack 11 are connected in sequence to form a loop, so that the battery pack 11 and the electric drive unit 21 can be heated simultaneously under the first heating condition.

[0076] It should be noted that in the first heating mode, the first heating condition, the second three-way valve 45 can be controlled by the controller to act, so that the third port J of the second three-way valve 45 is in communication with the first port H of the second three-way valve 45, the heater 41 is in series with the third heat exchange flow path 531 of the heat exchanger 53, and the heater 41 is used to heat the cooling liquid flowing out of the third heat exchange flow path 531 of the heat exchanger 53. In turn, the heater 41 can be used to simultaneously heat the battery pack 11 and the electric drive unit 21; in the second heating mode, the first heating condition, the second three-way valve 45 can be controlled by the controller to act, so that the third port J of the second three-way valve 45 is in communication with the second port I of the second three-way valve 45, the engine 48 is in series with the third heat exchange flow path 531 of the heat exchanger 53, and the engine 48 is used to heat the cooling liquid flowing out of the third heat exchange flow path 531 of the heat exchanger 53. In turn, the engine 48 can be used to simultaneously heat the battery pack 11 and the electric drive unit 21; in the third heating mode, the first heating condition, the second three-way valve 45 can be controlled by the controller to act, so that the third port J of the second three-way valve 45 is in communication with the first port H and the second port I of the second three-way valve 45, the third heat exchange flow path 531 of the heat exchanger 53 is in series with the heater 41, and the third heat exchange flow path 531 and the engine 48 are also in series, so that the cooling liquid in the third flow path 2a of the heat exchanger 53 can be heated simultaneously by the heater 41 and the engine 48. In turn, the engine 48 and the heater 41 can be used to simultaneously heat the battery pack 11 and the electric drive unit 21.

[0077] In addition, the first heating mode, the second heating mode and the third heating mode all have a second condition, as shown in Figure 9 , Figure 10 and Figure 11 , in the second heating condition, the controller controls the first three-way valve 15 and the four-way valve 16 to act, so that the first interface A of the four-way valve 16 is in communication with the second interface B, and the fourth interface D is in communication with the third interface C, the first three-way valve 15 makes the second interface B of the four-way valve 16 in communication with the fourth heat exchange flow path 532 of the heat exchanger 53, so that the fourth heat exchange flow path 532 of the heat exchanger 53 is in series with the battery pack 11, to heat the battery pack 11.

[0078] It should be noted that, in the second heating working condition of the first heating mode, the controller can control the second three-way valve 45 to act, so that the third port J of the second three-way valve 45 communicates with the first port H of the second three-way valve 45, the heater 41 is connected in series with the third heat exchange flow path 531 of the heat exchanger 53, and the heater 41 is used to heat the cooling liquid flowing out of the third heat exchange flow path 531 of the heat exchanger 53. In turn, the heater 41 can be used to heat the battery pack 11; in the second heating working condition of the second heating mode, the controller can control the second three-way valve 45 to act, so that the third port J of the second three-way valve 45 communicates with the second port I of the second three-way valve 45, the engine 48 is connected in series with the third heat exchange flow path 531 of the heat exchanger 53, and the engine 48 is used to heat the cooling liquid flowing out of the third heat exchange flow path 531 of the heat exchanger 53. In turn, the engine 48 can be used to heat the battery pack 11; in the second heating working condition of the third heating mode, the controller can control the second three-way valve 45 to act, so that the third port J of the second three-way valve 45 communicates with the first port H and the second port I of the second three-way valve 45, the third heat exchange flow path 531 of the heat exchanger 53 is connected in series with the heater 41, and the third heat exchange flow path 531 and the engine 48 are also connected in series, the cooling liquid in the third flow path 2a of the heat exchanger 53 can be heated by the heater 41 and the engine 48 at the same time. In turn, the engine 48 and the heater 41 can be used to heat the battery pack 11 at the same time.

[0079] In some embodiments, when unexpected situations occur in components or systems on the vehicle, causing the thermal management system to fail to achieve the expected control target, the system safety of the vehicle can be ensured by disabling part of the heat production and heat demand units.

[0080] For example, when the temperature of the power battery is relatively high and exceeds the target setting value, the thermal management system will shield the passenger compartment refrigeration request, actively close the first air conditioning stop valve 32 and the second air conditioning stop valve 39, and increase the power of the compressor 35 in the compression cooling subsystem. The controller controls the four-way valve 16 and the first three-way valve 15 to act, so that the battery pack 11 and the fourth heat exchange flow path 532 of the battery cooler 18 are connected in series. The battery pack 11 is cooled by the battery cooler 18 and the compression cooling sub-circuit. The power-driven cycle is prohibited to continue to work, in addition, the working state of the engine 48 can be actively adjusted to ensure that the power of the compressor 35 comes from the engine 48, reduce the use of the battery pack 11, and open the electronic expansion valve 302 to the maximum state to improve the cooling capacity of the battery pack 11.

[0081] It should be noted that the second three-way valve 45 can also be configured as a three-way proportional valve. In addition, the controller (not shown in the figure) can be a driving computer on the vehicle.

[0082] For the convenience of understanding, the disclosure combines the drawings Figures 1 to 11The cycle process and principle of the thermal management system in different working modes are exemplified.

[0083] Mode 1: The first cooling mode. Figure 2 As shown, in this mode, the battery pack 11 and the first radiator 14 are in series relationship. The controller controls the first interface A of the four-way valve 16 to be connected to the second interface B, and the third interface C of the four-way valve 16 to be connected to the fourth interface D. The controller controls the third valve port G of the first three-way valve 15 to be connected to the second valve port F and blocks the connection between the third valve port G and the first valve port E. So that the battery pack 11 is connected to the first radiator 14 through the four-way valve 16 and the first three-way valve 15. The coolant outlet of the battery pack 11, the first interface A of the four-way valve 16, the second interface B of the four-way valve 16, the first radiator 14, the first water pump 13, and the coolant inlet of the battery pack 11 are connected in sequence to form a loop. As shown Figure 2 As shown, the coolant flow path in the battery pack 11 is: battery pack 11, the coolant outlet of the battery pack 11, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third valve port G of the first three-way valve 15, the second valve port F of the first three-way valve 15, the first radiator 14, the first water pump 13, the coolant inlet of the battery pack 11, and the battery pack 11. The coolant in the battery pack 11 circulates along this path, dissipating heat to the first radiator 14 before being transported back to the battery pack 11 and continuing to circulate until the battery pack 11 is cooled to an appropriate temperature. This cooling mode can be selected when the heat dissipation of the battery pack 11 is not large.

[0084] In this mode, the electric drive unit 21 can be cooled depending on driving conditions. If the vehicle is driving, the controller connects the first opening K and the second opening L of the third three-way valve 23. The coolant flow path is through the hybrid case 213, the second opening L of the third three-way valve 23, the first opening K of the third three-way valve 23, the second radiator 24, the fourth port D of the four-way valve 16, the third port C of the four-way valve 16, the second water pump 211, the motor controller 212, and then back to the hybrid case 213. This places the electric drive unit 21 in series with the second radiator 24, allowing heat dissipation from the motor controller 212 and the hybrid case 213 to the second radiator 24. When the first cooling mode is enabled, the thermal management system cools the battery pack 11 via the first radiator 14. When the vehicle is driving, the electric drive unit 21 can be connected in series with the second radiator 24, allowing heat dissipation from the electric drive unit 21 to the second radiator 24. The first cooling mode can be used when driving in a medium temperature environment, using the first radiator 14 to dissipate heat from the battery pack 11 and the second radiator 24 to dissipate heat from the electric drive unit 21. The medium temperature environment can be 0°C-25°C.

[0085] Mode 2: Second cooling mode. Figure 3 As shown, in this mode, the controller controls the second port B of the four-way valve 16 to communicate with the fourth port D, and the first port A to communicate with the third port C. In addition, the third valve port G of the first three-way valve 15 is communicated with the second port B, and the second valve port F of the first three-way valve 15 is communicated with the first radiator 14. The controller controls the first three-way valve 15 to operate so that the third valve port G and the second valve port F of the first three-way valve 15 are communicated, thereby allowing the second port B of the four-way valve 16 to communicate with the first radiator 14. The controller controls the action of the third three-way valve 23 so that the second opening L and the first opening K of the third three-way valve 23 are connected, and then the first water pump 13, the battery pack 11, the first interface A of the four-way valve 16, the third interface C of the four-way valve 16, the second water pump 211, the motor controller 212, the hybrid box 213, the second opening L of the third three-way valve 23, the first opening K of the third three-way valve 23, the second radiator 24, the fourth interface D of the four-way valve 16, the second interface B of the four-way valve 16, the third valve port G of the first three-way valve 15, the second valve port F of the first three-way valve 15, and the first radiator 14 are connected in sequence, and the outlet of the first radiator 14 is connected to the first water pump 13 to form a loop. In this mode, the coolant flow path in the thermal management system is as follows: battery pack 11, first port A of four-way valve 16, third port C of four-way valve 16, second water pump 211 of electric drive unit 21, motor controller 212, hybrid case 213, second opening L of third three-way valve 23, first opening K of third three-way valve 23, second radiator 24, fourth port D of four-way valve 16, second port B of four-way valve 16, third port G of first three-way valve 15, second port F of first three-way valve 15, first radiator 14, first water pump 13, battery pack 11. In the second cooling mode, the first and second radiators 14, 24 are connected in series. Heat dissipation from the battery pack 11 is dissipated through the series connection of the first and second radiators 14, 24, increasing the heat dissipation area of ​​the radiators and improving heat dissipation efficiency. The thermal management system's second cooling mode can be used when the vehicle is parked and powered on. During this time, the vehicle is not moving, and the hybrid box 213 of the electric drive unit 21 is not operating. Heat can be dissipated from the battery pack 11 simultaneously through the first radiator 14 and the second radiator 24. The second cooling mode can be used when the vehicle is parked and charging in a medium-temperature environment, which can range from 0°C to 25°C.

[0086] Mode 3: The third cooling mode. Figure 4As shown, in this cooling mode, the controller controls the first three-way valve 15 and the four-way valve 16, so that the first port A of the four-way valve 16 communicates with the second port B of the four-way valve 16, and the third port C of the four-way valve 16 communicates with the fourth port D of the four-way valve 16. In addition, in this cooling mode, the third port G of the first three-way valve 15 communicates with the first port E of the first three-way valve 15, so that the battery pack 11 cooling liquid outlet communicates with the first heat exchange flow path 181 of the battery cooler 18, so as to cool the battery pack 11 through the battery cooler 18 and the compression cooling subsystem. In this cooling mode, the flow path of the battery pack 11 cooling liquid is: the battery pack 11, the battery pack 11 cooling liquid outlet, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third port G of the first three-way valve 15, the first port E of the first three-way valve 15, the first heat exchange flow path 181 of the battery cooler 18, the first water pump 13, the cooling liquid inlet of the battery pack 11, and the battery pack 11. In this mode, the battery pack 11 can be cooled at a faster speed, and the temperature of the battery pack 11 can be quickly reduced to a suitable temperature. The third cooling mode can be applied when charging in a high-temperature environment. The high-temperature environment can be greater than 35°C.

[0087] Mode 4: Fourth cooling mode. As shown, Figure 5 In this mode, the controller controls the first three-way valve 15 and the four-way valve 16 to act, so that the first port A of the four-way valve 16 communicates with the second port B of the four-way valve 16, the third port C of the four-way valve 16 communicates with the fourth port D of the four-way valve 16, the third port G of the first three-way valve 15 respectively communicates with the first port E and the second port F of the first three-way valve 15, and the cooling liquid outlet of the battery pack 11 communicates with the first radiator 14 and the first heat exchange flow path 181 of the battery cooler 18 through the first three-way valve 15, so that the battery pack 11 can be cooled through the first radiator 14 and the compression cooling subsystem and the battery cooler 18 at the same time. In addition, the first three-way valve 15 is configured as a three-way proportional valve. In this cooling mode, the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the second port B of the four-way valve 16, and the third port G of the first three-way valve 15 are sequentially communicated, and then the third port G of the first three-way valve 15 respectively communicates with the first port E of the first three-way valve 15 and the second port F of the first three-way valve 15 to form two branches. The branch communicating with the first port E communicates with the first water pump 13 through the first heat exchange flow path 181 of the battery cooler 18, and the branch communicating with the second port F communicates with the first water pump 13 through the first radiator 14, and the first water pump 13 communicates with the cooling liquid inlet of the battery pack 11 to form a loop. In this cooling mode, the cooling liquid in the battery pack 11 flows in the loop, as shown in FIG. 6. Figure 5As shown, the arrows indicate the flow path of the coolant in this mode. The battery pack 11 is cooled by the first radiator 14, the battery cooler 18 and the compression cooling subsystem. This mode can be used when the heat dissipation capacity of the first radiator 14 is not enough to cool the battery pack 11 to a preset temperature range, and the battery cooler 18 and the compression cooling subsystem can be used to share part of the pressure. At this time, the compressor 35 in the compression cooling subsystem can operate at a lower power to reduce energy consumption in the thermal management system. It should be noted that the compressor 35 can be powered by the battery pack 11 or the engine 48.

[0088] Mode 5: The first heating mode. Figure 6 and Figure 9 As shown, in this mode, the controller is respectively connected to the first three-way valve 15, the third three-way valve 23 and the four-way valve 16 by signal. In the first heating mode, the heater 41 heats the battery pack 11 or the battery pack 11 and the electric drive unit 21. As mentioned above, the system in which the engine 48 and the heater 41 are located can be defined as a heating subsystem. In the heating subsystem, the controller controls the first port H and the third port J of the second three-way valve 45 to be connected, and controls the third water pump 42 to start. The third heat exchange flow path 531 of the heat exchanger 53 is connected in series with the heater 41. The flow path of the coolant in the heating subsystem is: the third heat exchange flow path 531 of the heat exchanger 53, the third water pump 42, the heater 41, the first port H of the second three-way valve 45, the third port I of the second three-way valve 45, and the third heat exchange flow path 531 of the heat exchanger 53. The heater 41 heats the coolant in the third heat exchange flow path 531 in the heat exchanger 53 , thereby allowing the heater 41 to heat the battery pack 11 or the battery pack 11 and the electric drive unit 21 .

[0089] In the first heating mode, there are a first heating condition and a second heating condition. In the first condition, if Figure 6As shown, the controller controls the fourth port D of the four-way valve 16 to communicate with the second port B, and the first port A to communicate with the third port C. The controller controls the first three-way valve 15 to make the second port B of the four-way valve 16 communicate with the fourth heat exchange flow path 532 of the heat exchanger 53. The controller controls the third three-way valve 23 to make the fourth port D of the four-way valve 16 communicate with the cooling liquid outlet of the electric drive unit 21. In the first heating working condition of the first heating mode, the battery pack 11 and the electric drive unit 21 are in series. The battery pack 11, the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the third port C of the four-way valve 16, the second water pump 211 of the electric drive unit 21, the motor controller 212, the hybrid box 213, the second opening L of the third three-way valve 23, the third opening M of the third three-way valve 23, the fourth port D of the four-way valve 16, the second port B of the four-way valve 16, the third valve port G of the first three-way valve 15, the first valve port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, and the cooling liquid inlet of the battery pack 11 are sequentially communicated to form a loop, so that the thermal management system can heat the battery pack 11 and the electric drive unit 21 simultaneously by the heater 41 in the first heating working condition of the first heating mode.

[0090] In the second heating working condition, as shown, Figure 9 the controller controls the first three-way valve 15 and the four-way valve 16 to act, so that the fourth heat exchange flow path 532 of the heat exchanger 53 is in series with the battery pack 11. Specifically, the controller controls the first port A of the four-way valve 16 to communicate with the second port B, and the third port C to communicate with the fourth port D. The controller controls the third valve port G of the first three-way valve 15 to communicate with the first valve port E of the first three-way valve 15, so that the fourth heat exchange flow path 532 of the heat exchanger 53 communicates with the battery pack 11 through the first three-way valve 15. The flow path of the cooling liquid in the loop is: the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third valve port G of the first three-way valve 15, the first valve port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, and the cooling liquid inlet of the battery pack 11. So that the thermal management system can heat the battery pack 11 by the heater 41 in the second heating working condition of the first heating mode. The second working condition in the first heating mode can be used when charging at a stop. When the sensor monitors that the ambient temperature is lower than the target temperature of the battery pack 11, it is enabled. For example, when the charging efficiency is between 50% and 60%, the target temperature is greater than about 0℃, and the monitored ambient temperature is less than 0℃. The second working condition in the first heating mode can be used.

[0091] Mode 6: second heating mode, as shown, Figure 7 and Figure 10As shown, the controller is signal connected with the first three-way valve 15, the third three-way valve 23 and the four-way valve 16 respectively. In the second heating mode, the battery pack 11 or the battery pack 11 and the power drive unit 21 are heated by the engine 48. As mentioned above, the system in which the engine 48 and the heater 41 are located can be defined as a heating subsystem. In the heating subsystem, the controller controls the third port J of the second three-way valve 45 to communicate with the second port I, and controls the fourth water pump 49 to start. The thermostat 44 blocks the third radiator 43. The third heat exchange flow path 531 of the heat exchanger 53 is in series with the engine 48. The flow path of the coolant in the heating subsystem is: the third heat exchange flow path 531 of the heat exchanger 53, the fourth water pump 49, the engine 48, the second port I of the second three-way valve 45, the third port J of the second three-way valve 45, the third heat exchange flow path 531 of the heat exchanger 53.

[0092] The second heating mode has a first heating condition and a second heating condition. In the first condition, as shown, Figure 7 As shown, the controller controls the fourth port D of the four-way valve 16 to communicate with the second port B, and the first port A to communicate with the third port C. The controller controls the first three-way valve 15 to make the second port B of the four-way valve 16 communicate with the fourth heat exchange flow path 532 of the heat exchanger 53. The controller controls the third three-way valve 23 to make the fourth port D of the four-way valve 16 communicate with the coolant outlet of the power drive unit 21. In the first heating condition of the second heating mode, the battery pack 11 and the power drive unit 21 are in series. The battery pack 11, the coolant outlet of the battery pack 11, the first port A of the four-way valve 16, the third port C of the four-way valve 16, the second water pump 211 of the power drive unit 21, the motor controller 212, the hybrid box 213, the second port L of the third three-way valve 23, the third port M of the third three-way valve 23, the fourth port D of the four-way valve 16, the second port B of the four-way valve 16, the third port G of the first three-way valve 15, the first port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, the coolant outlet of the battery pack 11 are sequentially connected to form a loop, so that the thermal management system can heat the battery pack 11 and the power drive unit 21 simultaneously in the first heating condition of the second heating mode.

[0093] In the second heating condition, as shown, Figure 10As shown, the controller controls the first three-way valve 15 and the four-way valve 16 to operate so that the fourth heat exchange flow path 532 of the heat exchanger 53 is in series with the battery pack 11. Specifically, the controller controls the first interface A of the four-way valve 16 to communicate with the second interface B, and the third interface C to communicate with the fourth interface D. The controller controls the third valve port G of the first three-way valve 15 to communicate with the first valve port E of the first three-way valve 15, so that the fourth heat exchange flow path 532 of the heat exchanger 53 is in communication with the battery pack 11 through the first three-way valve 15. The flow path of the coolant in this circuit is: the power battery pack 11 coolant outlet, the four-way valve 16 first interface A, the four-way valve 16 second interface B, the first three-way valve 15 third valve port G, the first three-way valve 15 first valve port E, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, the battery pack 11 coolant inlet. So that the thermal management system can heat the battery pack 11 by the engine 48 in the second heating mode of the second heating working condition.

[0094] Mode 7: third heating mode, as shown in Figure 8 and Figure 11 As shown, the controller is signal connected with the first three-way valve 15, the third three-way valve 23 and the four-way valve 16 respectively. In the third heating mode, the battery pack 11 or the battery pack 11 and the power driving unit 21 are heated by the engine 48 and the heater 41 at the same time. As mentioned above, the system in which the engine 48 and the heater 41 are located can be defined as a heating subsystem. In the heating subsystem, the controller controls the third port J of the second three-way valve 45 to communicate with the first port H and the second port I at the same time, and the controller controls the third water pump 42 and the fourth water pump 49 to start at the same time. The engine 48 and the heater 41 are connected in parallel, the engine 48 and the heater 41 are both in series with the third heat exchange flow path 531 of the heat exchanger 53, and the thermostat 44 blocks the third radiator 43. The flow path of the coolant in the heating subsystem is: the third heat exchange flow path 531 of the heat exchanger 53, the coolant flowing out of the third heat exchange flow path 531 of the heat exchanger 53 is divided into two branches and flows to the heater 41 and the engine 48 respectively, and the coolant heated by the heater 41 and the engine 48 is combined and then flows into the third heat exchange flow path 531 of the heat exchanger 53 to form a circulation.

[0095] In the third heating mode, there are a first heating working condition and a second heating working condition. In the first working condition, as shown in Figure 8As shown, the controller controls the fourth port D of the four-way valve 16 to communicate with the second port B, and the first port A to communicate with the third port C. The controller controls the first three-way valve 15 to make the second port B of the four-way valve 16 communicate with the fourth heat exchange flow path 532 of the heat exchanger 53. The controller controls the third three-way valve 23 to make the fourth port D of the four-way valve 16 communicate with the cooling liquid outlet of the electric drive unit 21. In the first heating working condition of the third heating mode, the battery pack 11 and the electric drive unit 21 are in series. The battery pack 11, the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the third port C of the four-way valve 16, the second water pump 211 of the electric drive unit 21, the motor controller 212, the hybrid box 213, the second opening L of the third three-way valve 23, the third opening M of the third three-way valve 23, the fourth port D of the four-way valve 16, the second port B of the four-way valve 16, the third valve port G of the first three-way valve 15, the first valve port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, and the cooling liquid inlet of the battery pack 11 are sequentially communicated to form a loop, so that the thermal management system can heat the battery pack 11 and the electric drive unit 21 simultaneously in the first heating working condition of the third heating mode.

[0096] The first working condition of the third heating mode can be used when driving at low temperature. The low temperature can be an ambient temperature less than -10°C.

[0097] In the second heating working condition, as shown, Figure 11 The controller controls the first three-way valve 15 and the four-way valve 16 to act, so that the fourth heat exchange flow path 532 of the heat exchanger 53 is in series with the battery pack 11. Specifically, the controller controls the first port A of the four-way valve 16 to communicate with the second port B, and the third port C to communicate with the fourth port D. The controller controls the third valve port G of the first three-way valve 15 to communicate with the first valve port E of the first three-way valve 15, so that the fourth heat exchange flow path 532 of the heat exchanger 53 communicates with the battery pack 11 through the first three-way valve 15. The flow path of the cooling liquid in the loop is: the cooling liquid outlet of the battery pack 11, the first port A of the four-way valve 16, the second port B of the four-way valve 16, the third valve port G of the first three-way valve 15, the first valve port E of the first three-way valve 15, the fourth heat exchange flow path 532 of the heat exchanger 53, the first water pump 13, and the cooling liquid inlet of the battery pack 11. So that the thermal management system can heat the battery pack 11 simultaneously in the second heating working condition of the third heating mode. The second working condition of the third heating mode can be used when the heater 41 cannot meet the heating demand of the battery pack 11. For example, when the ambient temperature is too low and the heater 41 cannot meet the heating demand of the battery pack 11, the battery pack 11 can be heated by the engine 48 and the heater 41 simultaneously.

[0098] In summary, the heat management system can realize the following modes: using the first radiator 14 to dissipate heat from the battery pack 11; using the compression cooling subsystem and the battery cooler 18 to dissipate heat from the battery pack 11; using the first radiator 14 and the second radiator 24 to dissipate heat from the battery pack 11; using the compression cooling subsystem and the battery cooler 18 and the first radiator 14 to dissipate heat from the battery pack 11; using the heater 41 and / or the engine 48 to heat the battery pack 11; or using the heater 41 and / or the engine 48 to heat the battery pack 11 and the electric drive unit 21.

[0099] It should be noted that the above several working modes are only the main working modes of the heat management system of the present disclosure. Other working modes that can be realized based on the heat management system still fall within the protection scope of the present disclosure.

[0100] The second aspect of the present disclosure provides a vehicle comprising the heat management system provided by the first aspect of the present disclosure.

[0101] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept scope of the present disclosure, the technical solutions of the present disclosure can be subjected to various simple modifications, and these simple modifications all fall within the protection scope of the present disclosure.

[0102] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0103] Furthermore, the various different embodiments of the present disclosure can also be combined in any manner, as long as it does not deviate from the idea of the present disclosure, it should also be considered as the disclosed content of the present disclosure.

Claims

1. A thermal management system, characterized by, The heat management system comprises a first radiator, a battery pack, a battery cooler, a first three-way valve and a controller, a cooling liquid outlet of the battery pack is communicated with an inlet of the first radiator through a first flow path, a cooling liquid inlet of the battery pack is communicated with an outlet of the first radiator through a second flow path, a first heat exchange flow path of the battery cooler is communicated between the first flow path and the second flow path, a second heat exchange flow path of the battery cooler is communicated in a compression refrigeration subsystem, the first heat exchange flow path is communicated with the first flow path through the first three-way valve, and the controller is signal connected with the first three-way valve to make at least one of the first radiator and the battery cooler used for cooling of the battery pack.

2. The thermal management system of claim 1, wherein, The heat management system has a first cooling mode, in which the first three-way valve makes the inlet of the first radiator communicated with the cooling liquid outlet of the battery pack and blocks the communication between the first heat exchange flow path and the first flow path. The heat management system has a third cooling mode, in which the first three-way valve makes the first heat exchange flow path communicated with the cooling liquid outlet of the battery pack and blocks the communication between the inlet of the first radiator and the cooling liquid outlet of the battery pack. The heat management system has a fourth cooling mode, in which the first three-way valve makes the inlet of the first radiator and the first heat exchange flow path both communicated with the cooling liquid outlet of the battery pack.

3. The thermal management system of claim 1, wherein, The heat management system further comprises a power driving unit, a four-way valve, a second radiator, the four-way valve is arranged on the first flow path, a first interface of the four-way valve is communicated with the cooling liquid outlet of the battery pack, a second interface of the four-way valve is communicated with the first three-way valve, a third interface of the four-way valve is communicated with a cooling liquid inlet of the power driving unit, a fourth interface of the four-way valve is communicated with an outlet end of the second radiator, an inlet end of the second radiator is communicated with a cooling liquid outlet of the power driving unit, and the controller is signal connected with the four-way valve. The heat management system has a second cooling mode, in which the second interface is communicated with the fourth interface, the first interface is communicated with the third interface, and the first three-way valve makes the second interface communicated with the first radiator.

4. The thermal management system of claim 3, wherein, The heat management system further comprises a heat exchanger and a heater, an outlet of the heater is communicated with an inlet of a third heat exchange flow path of the heat exchanger through a third flow path, an inlet of the heater is communicated with an outlet of the third heat exchange flow path of the heat exchanger through a fourth flow path, and a fourth heat exchange flow path of the heat exchanger is connected in series with the first heat exchange flow path of the battery cooler between the first flow path and the second flow path.

5. The thermal management system of claim 4, wherein, The heat management system further comprises an engine, the engine is connected in parallel with the heater between the third flow path and the fourth flow path, a second three-way valve is arranged at a communication position of the outlet of the heater and the third flow path, and the controller is signal connected with the second three-way valve to make at least one of the heater and the engine used for heating of the battery pack.

6. The thermal management system of claim 5, wherein, The heat management system has a first heating mode, in which the second three-way valve allows the outlet of the heater to communicate with the inlet of the third heat exchange flow path, and blocks the communication between the outlet of the engine coolant and the inlet of the third heat exchange flow path; The heat management system has a second heating mode, in which the second three-way valve allows the outlet of the engine coolant to communicate with the inlet of the third heat exchange flow path, and blocks the communication between the outlet of the heater and the inlet of the third heat exchange flow path; The heat management system has a third heating mode, in which the second three-way valve allows both the outlet of the engine coolant and the outlet of the heater to communicate with the inlet of the third heat exchange flow path.

7. The thermal management system of claim 5, wherein, The heat management system further comprises a third radiator, which is connected in parallel with the engine between the third flow path and the fourth flow path; A thermostat is arranged on the third flow path between the connection of the third radiator and the third flow path and the connection of the engine and the third flow path, or a thermostat is arranged on the fourth flow path between the connection of the third radiator and the fourth flow path and the connection of the engine and the fourth flow path.

8. The thermal management system of claim 6, wherein, The heat management system further comprises a third three-way valve, a first opening of which is connected to the inlet end of the second radiator, a second opening of which is connected to the outlet of the electric drive unit, and a third opening of which is connected to the fifth flow path, the controller being signal-connected to the third three-way valve to allow at least one of the heater and the engine to heat the battery pack or the battery pack and the electric drive unit.

9. The thermal management system of claim 8, wherein, The heat management system has a first heating condition and a second heating condition in the first heating mode, the second heating mode and the third heating mode, in the first heating condition, the fourth interface communicates with the second interface, and the first interface communicates with the third interface, the first three-way valve allows the second interface to communicate with the fourth heat exchange flow path of the heat exchanger, and the third three-way valve allows the fourth interface to communicate with the outlet of the electric drive unit; In the second heating condition, the first interface communicates with the second interface, and the third interface communicates with the fourth interface, the first three-way valve allows the second interface to communicate with the fourth heat exchange flow path of the heat exchanger.

10. A vehicle characterized by comprising: The heat management system as claimed in any one of claims 1-9.

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