CN113580871A

CN113580871A - Vehicle and thermal management system thereof

Info

Publication number: CN113580871A
Application number: CN202010368152.2A
Authority: CN
Inventors: 谷利亚; 张宏洲; 廖银生; 张蕾; 邵兴杨
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-11-02
Anticipated expiration: 2040-04-30
Also published as: CN113580871B

Abstract

The present disclosure relates to a vehicle and a thermal management system thereof, the thermal management system includes a first cooling circuit (10) for cooling a motor system, a second cooling circuit (20) for cooling a battery pack, and an air conditioning circuit (30), the first cooling circuit and the second cooling circuit are connected through a first multi-way reversing valve and a second multi-way reversing valve, and are connected with the air conditioning circuit through a water chiller and a heat pump exchanger, so that the motor system and the battery pack can be selectively cooled by the water chiller connected into the air conditioning circuit, or heated by the water chiller connected into the heat pump exchanger and the water chiller connected into the air conditioning circuit. Through setting up multi-ported switching-over valve, cold water machine and heat pump exchanger, can realize the multiple series-parallel connection circulation mode of first cooling circuit, second cooling circuit and air conditioning circuit, can change the circulation direction of coolant liquid according to the demand, the rational distribution coolant liquid flow effectively improves thermal management efficiency and waste heat utilization.

Description

Vehicle and thermal management system thereof

Technical Field

The disclosure relates to the technical field of vehicle thermal management, in particular to a vehicle and a thermal management system thereof.

Background

The vehicle thermal management system comprises a motor system cooling loop, a battery system low-temperature heat dissipation loop, a battery system higher-temperature cooling loop, a battery system heating loop, a passenger compartment heater heating loop, a passenger compartment refrigerating loop and the like, and can meet the cooling requirements of the motor system, the heating and cooling requirements of the battery system and the refrigerating and heating requirements of passengers. However, in the related art, the above-mentioned multiple loops are independent of each other, and thus, effective utilization of energy cannot be realized, and a heat dissipation requirement in a charging process of the electric vehicle cannot be satisfied.

Disclosure of Invention

The first purpose of the present disclosure is to provide a vehicle thermal management system, which can realize intelligent distribution of heat of the whole vehicle, and improve the efficiency and utilization rate of thermal management.

A second object of the present disclosure is to provide a vehicle comprising a thermal management system as provided by the present disclosure.

In order to achieve the above object, the present disclosure provides a thermal management system for a vehicle, including a first cooling circuit for cooling a motor system, a second cooling circuit for cooling a battery pack, and an air conditioning circuit, the first cooling circuit and the second cooling circuit are connected through a first multi-way reversing valve and a second multi-way reversing valve, and are connected with the air conditioning circuit through a water chiller and a heat pump exchanger, so that the motor system and the battery pack may be selectively cooled by the water chiller inserted into the air conditioning circuit, or heated by the heat pump exchanger and the water chiller inserted into the air conditioning circuit.

Optionally, the water chiller and the heat pump exchanger are connected to the air conditioning circuit through a third multi-way reversing valve, the first multi-way reversing valve, the second multi-way reversing valve, and the third multi-way reversing valve are all six-way valves, and the thermal management system has at least one of the following operating modes: in the first working mode, the motor system and the battery pack are connected in series and are cooled by a water cooler connected into the air-conditioning loop; in a second working mode, the motor system and the battery pack are connected in parallel, the motor system is cooled by a motor radiator in the first cooling loop, and the battery pack is cooled by a water cooler connected to the air-conditioning loop; in a third operating mode, the motor system and the battery pack are connected in parallel, the motor system is cooled by a motor radiator in the first cooling loop, and the battery pack is cooled by a battery radiator in the second cooling loop; in a fourth working mode, the motor system and the battery pack are connected in series, and heat generated in the working process of the motor system is used for heating the battery pack; in a fifth working mode, the motor system and the battery pack are connected in parallel, heat generated in the working process of the motor system is used for heat preservation, and the battery pack is connected into a water cooling machine in the air-conditioning loop for heating; and in a sixth working mode, the motor system is connected with the battery pack in parallel, the motor system is heated through the heat pump exchanger, and the battery pack is heated through a water cooling machine connected into the air-conditioning loop.

Optionally, the first cooling circuit includes a motor assembly, a charging and distributing assembly, a first auxiliary water tank, a first water pump, a motor radiator and a first fan disposed on one side of the motor radiator, which are connected to each other, the motor assembly and the charging and distributing assembly are connected in parallel, and the thermal management system at least further includes: and in a seventh working mode, the motor assembly does not work, and the charging and distributing assembly can be selectively cooled by the motor radiator or a water cooler connected into the air-conditioning loop.

Optionally, the second cooling circuit includes a battery pack, a second sub-water tank, a second water pump, a battery radiator and a water chiller connected in parallel with the battery radiator, which are connected to each other.

Optionally, the first secondary water tank is connected in series or in parallel to the first cooling circuit, and the second secondary water tank is connected in series or in parallel to the second cooling circuit.

Optionally, the air conditioning loop includes a compressor, a gas-liquid separator, the third multi-way selector valve, an evaporator, a condenser, and a water chiller connected in parallel to the condenser, which are connected to each other.

Optionally, the motor radiator and the battery radiator are disposed on an air intake side of the condenser, and the first fan is disposed on an air outlet side of the condenser.

Optionally, the motor assembly comprises a front motor assembly and/or a rear motor assembly.

Optionally, the thermal management system further includes a controller and a plurality of detection elements disposed in the first cooling circuit, the second cooling circuit and the air conditioning circuit, and the controller is connected to the plurality of detection elements and the water pumps, the fans and the compressors in the plurality of circuits, respectively.

According to a second aspect of the present disclosure, there is also provided a vehicle including the thermal management system of the vehicle described above.

Through above-mentioned technical scheme, through setting up the switching-over valve that leads to more, insert cold water machine and heat pump exchanger in the air conditioner return circuit, couple together motor cooling circuit, battery cooling circuit and air conditioner return circuit, can realize the circulation mode of the multiple series-parallel connection of first cooling circuit, second cooling circuit and air conditioner return circuit, can change the circulation direction of coolant liquid according to the demand, rational distribution coolant liquid flow effectively improves thermal management efficiency and waste heat utilization ratio.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic illustration of a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a first mode of operation of a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a second mode of operation of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a third mode of operation of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic illustration of a fourth mode of operation of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic illustration of a fifth mode of operation of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic illustration of a sixth mode of operation of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic illustration of a seventh operating mode of a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

9-10 are schematic diagrams of a thermal management system of a vehicle provided by another exemplary embodiment of the present disclosure;

FIG. 11 is a control block diagram of a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 12 is a summary of control signals for a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 13 is an illustration of different modes of operation of a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 14 is a schematic illustration of a first multi-way reversing valve in a thermal management system of a vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 15 is a schematic illustration of a second multi-way reversing valve in a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure;

FIG. 16 is a schematic illustration of a third multi-way reversing valve in the thermal management system of the vehicle provided by an exemplary embodiment of the present disclosure;

FIG. 17 is a schematic diagram illustrating the arrangement of a radiator, a condenser, and a fan in a thermal management system of a vehicle according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-an electric motor system, 11-a front electric motor assembly, 12-a rear electric motor assembly, 13-a charging power assembly, 14-a first auxiliary water tank, 15-a first water pump, 16-an electric motor radiator, 17-a first fan, 2-a battery pack, 21-a battery radiator, 22-a second auxiliary water tank, 23-a second water pump, 3-a water chiller, 31-a compressor, 32-a gas-liquid separator, 33-an evaporator, 34-a condenser, 35-a second fan, 4-a heat pump exchanger, 10-a first cooling circuit, 20-a second cooling circuit, 30-an air conditioning circuit, 100-a first multi-way reversing valve, 200-a second multi-way reversing valve, 300-a third multi-way reversing valve, 400-a one-way valve, 500-an electronic expansion valve, 1000-controller.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms "inner" and "outer" refer to the inner and outer of the respective component outlines with reference to the drawing planes of the respective drawings, and furthermore, the use of the terms "first" and "second" and the like in the present disclosure is intended to distinguish one element from another element without order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

As shown in fig. 1, the present disclosure provides a thermal management system of a vehicle, which includes a first cooling circuit 10 for cooling a motor system 1, a second cooling circuit 20 for cooling a battery pack 2, and an air-conditioning circuit 30, wherein the first cooling circuit 10 and the second cooling circuit 20 are connected through first and second

multi-way selector valves

100 and 200, and are connected with the air-conditioning circuit 30 through a water chiller 3 and a heat pump exchanger 4, so that the motor system 1 and the battery pack 2 can be selectively cooled by the water chiller 3(chiller) incorporated in the air-conditioning circuit 30, or heated by the heat pump exchanger 4 and the water chiller 3 incorporated in the air-conditioning circuit 30. In fig. 1, the first cooling circuit 10, the second cooling circuit 20, and the air conditioning circuit 30 are represented by different types of lines, the first cooling circuit 10 is represented by a thick solid line, the second cooling circuit 20 is represented by a dotted line, and the air conditioning circuit 30 is represented by a dotted line, where the term "air conditioning circuit" refers to an air conditioning circuit with a heat pump function, that is, a circuit that can perform cooling or heating, and can be selected according to an ambient temperature and the operation conditions of the motor system 1 and the battery pack 2. And one side of the water cooler (chiller) is communicated with cooling liquid, and the other side of the water cooler (chiller) is communicated with refrigerant, so that heat can be exchanged according to temperature difference, and the water cooler (chiller) is used for cooling or heating the motor system 1 and the battery pack 2. The heat pump exchanger 4 can absorb heat generated during the operation of the motor system 1 and the battery 2 and generate more heat by using the absorbed heat, and therefore, the efficiency of the heat pump exchanger 4 is much greater than 1. In addition, here, the "motor system 1" includes a front motor assembly 11, a rear motor assembly 12, and a charging power assembly 13, where the front motor assembly 11 and the rear motor assembly 12 constitute a motor assembly, a cooling fluid flows through the first cooling circuit 10 and the second cooling circuit 20, a refrigerant flows through the air conditioning circuit 30, and heat exchange is performed at the chiller 3(chiller) and the heat pump exchanger 4 to achieve heat exchange.

Through the technical scheme, the multi-way reversing valve, the water cooler 3 and the heat pump exchanger 4 which are connected into the air-conditioning loop 30 are arranged, the motor cooling loop, the battery cooling loop and the air-conditioning loop 30 are connected, through controlling the conduction or the cut-off of different passages in the first multi-way reversing valve 100, the second multi-way reversing valve 200 and the third multi-way reversing valve 300 which is introduced in the following, multiple series-parallel connection circulation modes of the first cooling loop 10, the second cooling loop 20 and the air-conditioning loop 30 can be realized, the circulation direction of cooling liquid can be changed according to requirements, the flow of the cooling liquid is reasonably distributed, and the heat management efficiency and the waste heat utilization rate are effectively improved.

As an exemplary embodiment of the present disclosure, as shown in fig. 1, the water chiller 3 and the heat pump exchanger 4 are connected to the air conditioning circuit 30 through a third multi-way reversing valve 300, and the first, second and third

multi-way reversing valves

100, 200 and 300 are all six-way valves, and the thermal management system of the vehicle provided by the present disclosure has at least one of the following operation modes:

in the first operation mode, as shown in fig. 2, 14 to 16, the

passages

103 and 104 of the first multi-way reversing valve 100 are conducted, the

passages

205 and 203 of the second multi-way reversing valve 200 are conducted, the

passages

306 and 305 and 303 and 304 and 306 of the third multi-way reversing valve 300 are conducted, the motor system 1 and the battery pack 2 are connected in series and cooled by the water cooler 3 connected to the air conditioning loop 30, specifically, as shown in table 1.1 and 13, in the first operation mode, because the ambient temperature is high, for example, under an extreme condition that the ambient temperature is equal to or greater than 40 ℃, the motor radiator 16 cannot meet the heat dissipation requirement of the motor system 1, the battery radiator 21 cannot meet the heat dissipation requirement of the battery pack 2, at this time, the air conditioning loop 30 can realize the refrigeration of the passenger compartment, and at the same time, can exchange heat at the water cooler 3(chiller), cooling liquid in loops of the motor system 1 and the battery pack 2 to realize effective cooling of the motor system and the battery pack 2;

in the second operation mode, as shown in fig. 3 and 14 to 16, the passage 101-, the air conditioner refrigerates normally, and meanwhile, the battery pack 2 is cooled through the water chiller 3, so that the battery pack 2 is cooled rapidly;

in a third operation mode, as shown in fig. 4, 14 to 16, the channels 101-. Specifically, as shown in table 1.1 and fig. 13, in the third operating mode, when the ambient temperature is greater than or equal to 10 ℃ and t is less than or equal to 30 ℃, the motor radiator 16 can meet the heat dissipation requirement of the motor system 1, and the battery radiator 21 can meet the heat dissipation requirement of the battery pack 2, that is, the radiator is preferentially adopted to dissipate heat, and whether to start air conditioning for cooling is determined according to the requirement of the passenger;

in a fourth operation mode, as shown in fig. 5, 14 to 16, the

channels

102 and 103 and 102 and 104 in the first multi-way reversing valve 100 are conducted, the

channels

201 and 205 and 206 and 203 in the second multi-way reversing valve 200 are conducted, no channel is conducted in the third multi-way reversing valve 300, the motor system 1 and the battery pack 2 are connected in series, and heat generated in the operation process of the motor system 1 is used for heating the battery pack 2. Specifically, as shown in table 1.1 and fig. 13, when the ambient temperature is 0 ℃ or more and t < 10 ℃ and the temperature of the battery pack 2 is less than 15 ℃, the interface 102 of the first multi-way reversing valve 100 and the heat pump exchanger 4 are connected through the pipeline, and the interface 203 of the second multi-way reversing valve 200 and the heat pump exchanger 4 are connected through the pipeline, so that the battery radiator 21 and the motor radiator 16 can be connected in parallel (do not work), thus, the air conditioner does not work, the heat generated in the working process of the motor system 1 can be used for heating the battery pack 2, the heating of the battery pack 2 is realized, the effective utilization of energy can be realized, and the utilization rate is improved;

in the fifth operation mode, when the heat generated in the operation process of the motor system 1 cannot satisfy the heating requirement of the battery pack 2, for example, when the ambient temperature is-10 ℃ to t < 0 ℃, as shown in fig. 6, 14 to 16, the

channels

102 and 104 in the first multi-way reversing valve 100 are conducted, the

channels

201 and 206 and 205 in the second multi-way reversing valve 200 are conducted, the

channels

303 and 306, 305 and 301 and 305 and 304 in the third multi-way reversing valve 300 are conducted, the motor system 1 and the battery pack 2 are connected in parallel, the heat generated in the operation process of the motor system 1 is used for self heat preservation, the battery pack 2 is heated by the water cooler 3 connected to the air-conditioning loop 30, that is, when the ambient temperature is low, the heat pump exchanger 4 absorbs the heat generated in the operation process of the motor, and generates more heat for self heat preservation by the absorbed heat, the battery pack 2 is heated through the water cooler 3 in the air-conditioning loop, the temperature of the refrigerant is increased, the temperature of the cooling liquid is further increased, and the battery pack 2 is rapidly heated;

in the sixth working mode, under an extreme working condition, for example, when the ambient temperature is lower than-10 ℃, and the heat generation amount of the motor system 1 cannot meet the heat preservation requirement of the motor system, as shown in fig. 7, 14 to 16, the passage 102 and the passage 104 in the first multi-way reversing valve 100 are communicated, the passage 201 and the passage 206 and the passage 205 in the second multi-way reversing valve 200 are communicated, the passage 305 and the passage 304, the passage 305 and the passage 301 and the passage 303 and the passage 306 in the third multi-way reversing valve 300 are communicated, the motor system 1 and the battery pack 2 are connected in parallel, the motor system 1 is heated by the heat pump exchanger 4, the battery pack 2 is heated by the water cooler 3 connected to the air conditioning circuit 30, and the heat pump exchanger 4 heats the refrigerant by using the waste heat of the motor in order to ensure that the air conditioning circuit 30 has a high energy efficiency ratio (COP), the motor system 1 is heated, and the battery pack 2 is heated by the water cooler 3 connected into the air-conditioning loop 30, so that the motor system 1 and the battery pack 2 are heated quickly. In the working mode, the motor system 1 and the battery pack 2 can be connected in series, and the heat pump exchanger 4 can absorb heat generated in the working process of the motor assembly and the battery pack 2 and heat a passenger compartment, so that rapid temperature rise in a vehicle is realized, and normal work of the motor system 1 and the battery pack 2 can be ensured.

TABLE 1.1 different operating modes and flow communication modes of a thermal management system for a vehicle

Further, as shown in fig. 1, the first cooling circuit 10 includes a motor assembly, a charging and distributing assembly 13, a first sub-tank 14, a first water pump 15, a motor radiator 16, and a first fan 17 disposed at one side of the motor radiator 16, and drives a cooling fluid to flow to the motor radiator 16 by the first water pump 15 and cools the motor assembly and the charging and distributing assembly 13 by the first fan 17. In this embodiment, the motor assembly and the charging and distributing assembly 13 are connected in parallel, the thermal management system provided by the present disclosure further includes a seventh operating mode, as shown in fig. 8, 14 to 16, the

passage

102 and 104 in the first multi-way reversing valve 100 are conducted, the

passage

201 and 206 and 203 in the second multi-way reversing valve 200 are conducted, and the

passage

301 and 306, the

passage

305 and 306 and the

passage

304 and 306 in the third multi-way reversing valve are conducted, that is, the motor assembly does not operate, the charging and distributing assembly 13 and the battery pack 2 are connected in series, and are cooled by the water cooler 3 connected to the air conditioning loop 30, so that the flow rate of the cooling liquid can be increased, the heat can be timely dissipated in the in-situ charging process, and the problem of limited charging power can be prevented. In other embodiments, when the ambient temperature is not particularly high, the motor heat sink 16 may be used to cool the charging assembly 13 to dissipate heat in the in-situ charging mode in a low temperature environment.

As shown in fig. 1, the second cooling circuit 20 includes a battery pack 2, a second sub-tank 22, a second water pump 23, a battery radiator 21, and a water cooling machine 3 connected in parallel with the battery radiator 21, and the second water pump 23 drives the cooling fluid to flow through the second sub-tank 22, the battery pack 2, to the battery radiator 21, and to be cooled to a suitable temperature by the first fan 17. The order of connection of the water pump, the subtank, the radiator, and the like in the first cooling circuit 10 and the second cooling circuit 20 is not limited at all here. In addition, as shown in fig. 1, in the air-conditioning circuit 30, two check valves 400 and one electronic expansion valve 500 are connected to one side of the evaporator 33, the condenser 34 and the water chiller 3, respectively, and the two check valves are connected in parallel, so that the flow direction of the refrigerant in the air-conditioning circuit can be changed by controlling the check valves 400.

In the present disclosure, as shown in fig. 1, the first auxiliary water tank 14 may be connected in series to the first cooling circuit 10, the second auxiliary water tank 22 may be connected in series to the second cooling circuit 20, and both auxiliary water tanks may participate in the cooling process and simultaneously function to store the cooling liquid; as another exemplary embodiment of the present disclosure, as shown in fig. 10, the first sub-tank 14 is connected in parallel to the first cooling circuit 10, and the second sub-tank 22 is connected in parallel to the second cooling circuit 20, that is, the sub-tank does not participate in the cooling and heat dissipation process, and only plays a role of filling and exhausting, and here, the sub-tank may be replaced by an expansion valve, which all fall within the protection scope of the present disclosure.

The air conditioning loop 30 may be an existing air conditioning loop system, and specifically, as shown in fig. 1, the air conditioning loop 30 includes a compressor 31, a gas-liquid separator 32, a third multi-way reversing valve 300, an evaporator 33, a condenser 34, and a water chiller 3 connected in parallel to the condenser 34, so as to achieve rapid cooling and heating in the passenger compartment, and simultaneously achieve rapid cooling of the motor system and the battery pack 2 through the water chiller 3, and rapid heating of the motor system and the battery pack 2 through the heat pump exchanger 4.

There may be various arrangements of the battery radiator 21, the motor radiator 16, the condenser 34, and the first fan 17. In an exemplary embodiment of the present disclosure, as shown in fig. 1, the battery radiator 21 and the motor radiator 16 may be disposed side by side at one side of the condenser 34, and the first fan 17 is disposed at the other side of the condenser 34. In another exemplary embodiment of the present disclosure, as shown in fig. 17, the motor radiator 16 and the battery radiator 21 may be disposed up and down on an air intake side of the condenser 34, the first fan 17 is disposed on an air outlet side of the condenser 34, and the battery radiator 21 is disposed below the motor radiator 16, the motor radiator 16 and the battery radiator 21 are disposed on the air intake side of the condenser 34, which may reduce wind resistance on the air intake side and ensure a sufficient amount of air, and at the same time, the battery radiator 21 may be disposed below the motor radiator 16 since the battery radiator 21 has a lower heat dissipation amount and has less influence on an over-cooled area of the condenser 34, and the condenser 34 and the first fan 17 may be fixed in various ways to ensure detachable installation on one side of the condenser 34.

The motor assembly comprises a front motor assembly 11 and/or a rear motor assembly 12, as another exemplary embodiment of the present disclosure, as shown in fig. 9, the thermal management system may be applied to a front-drive vehicle type only comprising the front motor assembly 11, or may be applied to a rear-drive vehicle type only comprising the rear motor assembly 12, and the front motor assembly 11 may be connected in parallel through a connecting pipeline, and may be switched to an in-situ charging mode.

As shown in fig. 11 and 12, the thermal management system provided by the present disclosure further includes a controller 1000, and a plurality of detection elements disposed in the first cooling circuit 10, the second cooling circuit 20, and the air conditioning circuit 30, wherein the controller 1000 is respectively connected to the plurality of detection elements, the first multi-way reversing valve 100, the second multi-way reversing valve 200, the third multi-way reversing valve 300, the first water pump 15, the second water pump 23, the compressor 31, the first fan 17, and the second fan 25, and the controller 1000 controls the compressor 31, the plurality of fans, and the plurality of water pumps according to the ambient temperature information and the information of the coolant and the refrigerant detected by the detection elements, so as to achieve intelligent control of the thermal management system. Specifically, the detecting element can be for setting up pressure sensor and the temperature sensor on corresponding pipeline, can accurately acquire the information of coolant liquid and refrigerant and in time transmit for controller 1000, and of course, this disclosure also includes through components and parts such as a plurality of multi-ported switching valves of operating personnel manual control, air conditioner switch, a plurality of fan switches, a plurality of water pump switches, the realization is to thermal management system's manual control and regulation, all belongs to this disclosed protection scope.

According to a second aspect of the present disclosure, a vehicle is further provided, where the vehicle includes the thermal management system of the vehicle, and the vehicle has all the beneficial effects of the thermal management system, and details are not repeated here. .

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A thermal management system for a vehicle, comprising a first cooling circuit (10) for cooling a motor system (1), a second cooling circuit (20) for cooling a battery pack (2), and an air-conditioning circuit (30), wherein the first cooling circuit (10) and the second cooling circuit (20) are connected by a first multi-way selector valve (100) and a second multi-way selector valve (200), and are connected to the air-conditioning circuit (30) by a water chiller (3) and a heat pump exchanger (4), so that the motor system (1) and the battery pack (2) can be selectively cooled by the water chiller (3) connected to the air-conditioning circuit (30), or heated by the heat pump exchanger (4) and the water chiller (3) connected to the air-conditioning circuit (30).

2. The thermal management system of a vehicle according to claim 1, characterized in that the water chiller (3) and the heat pump exchanger (4) are connected to the air conditioning circuit (30) by a third multi-way reversing valve (300), the first multi-way reversing valve (100), the second multi-way reversing valve (200), and the third multi-way reversing valve (300) being all six-way valves, the thermal management system having at least one of the following operating modes:

in a first operating mode, the motor system (1) and the battery pack (2) are connected in series and cooled by a water chiller (3) connected into the air conditioning circuit (30);

a second operating mode in which the motor system (1) and the battery pack (2) are connected in parallel, the motor system (1) is cooled by a motor radiator (16) in the first cooling circuit (10), and the battery pack (2) is cooled by a water chiller (3) connected to the air conditioning circuit (30);

a third operating mode in which the motor system (1) and the battery pack (2) are connected in parallel, the motor system (1) being cooled by a motor radiator (16) in the first cooling circuit (10), the battery pack (2) being cooled by a battery radiator (21) in the second cooling circuit (20);

in a fourth working mode, the motor system (1) and the battery pack (2) are connected in series, and heat generated in the working process of the motor system (1) is used for heating the battery pack (2);

in a fifth working mode, the motor system (1) and the battery pack (2) are connected in parallel, heat generated in the working process of the motor system (1) is used for heat preservation, and the battery pack (2) is heated by a water cooler (3) connected into the air-conditioning loop (30);

and in a sixth working mode, the motor system (1) and the battery pack (2) are connected in parallel, the motor system (1) is heated through the heat pump exchanger (4), and the battery pack (2) is heated through a water cooler (3) connected into the air-conditioning loop (30).

3. The thermal management system of a vehicle according to claim 2, characterized in that said first cooling circuit (10) comprises, connected, an electric motor assembly, a charging and distribution assembly (13), a first secondary water tank (14), a first water pump (15), an electric motor radiator (16) and a first fan (17) arranged on one side of said electric motor radiator (16), said electric motor assembly and said charging and distribution assembly (13) being connected in parallel, said thermal management system having at least:

and in a seventh working mode, the motor assembly does not work, and the charging and distributing assembly (13) can be selectively cooled by the motor radiator (16) or a water cooler (3) connected into the air-conditioning loop (30).

4. The thermal management system of a vehicle according to claim 3, characterized in that the second cooling circuit (20) comprises a battery pack (2), a second secondary water tank (22), a second water pump (23), a battery radiator (21) and a water cooler (3) connected in parallel with the battery radiator (21) in connection.

5. The thermal management system of a vehicle according to claim 4, characterized in that the first secondary water tank (14) is connected in series or in parallel into the first cooling circuit (10) and the second secondary water tank (22) is connected in series or in parallel into the second cooling circuit (20).

6. The thermal management system of a vehicle according to claim 4, characterized in that said air-conditioning circuit (30) comprises, connected, a compressor (31), a gas-liquid separator (32), said third multi-way selector valve (300), an evaporator (33), a condenser (34) and a water chiller (3) connected in parallel with said condenser (34).

7. The thermal management system of a vehicle according to claim 6, characterized in that the motor radiator (16) and the battery radiator (21) are disposed on an intake side of the condenser (34), and the first fan (17) is disposed on an outlet side of the condenser (34).

8. The thermal management system of a vehicle according to claim 3, characterized in that the electric machine assembly comprises a front electric machine assembly (11) and/or a rear electric machine assembly (12).

9. The thermal management system of a vehicle of any of claims 1-8, further comprising a controller (1000), and a plurality of sensing elements disposed in the first cooling circuit (10), the second cooling circuit (20), and the air conditioning circuit (30), the controller (1000) being connected to the first multi-way reversing valve (100), the second multi-way reversing valve (200), the plurality of sensing elements, and a water pump, a fan, and a compressor in the plurality of circuits, respectively.

10. A vehicle characterized by comprising a thermal management system of a vehicle according to any of claims 1-9.