CN219406082U

CN219406082U - Thermal management system and vehicle

Info

Publication number: CN219406082U
Application number: CN202320580468.7U
Authority: CN
Inventors: 陈云; 刘丰; 韩韬; 林霄喆; 于海生
Original assignee: Wuxi Xingqu Technology Co ltd; Wuxi Xingqu Power Technology Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Wuxi Xingqu Technology Co ltd; Wuxi Xingqu Power Technology Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-07-25
Anticipated expiration: 2033-03-22

Abstract

The application provides a thermal management system and a vehicle. The heat management system comprises a compressor branch, a refrigerant heat absorption pipeline group and a refrigerant heat dissipation pipeline group; the refrigerant heat absorption pipeline group comprises a motor cooling branch, a battery cooling branch and an air conditioner cooling branch; the device comprises a refrigerant heat dissipation pipeline group, a battery heating branch and an air conditioner heating branch; the refrigerant heat absorption pipeline group is connected in parallel between the outflow end of the refrigerant heat dissipation branch and the inflow end of the compressor branch; the refrigerant heat dissipation pipeline group is connected in parallel between the outflow end of the compressor branch and the inflow end of the motor cooling branch; a PTC heater is arranged on the motor cooling branch. The thermal management system is a refrigerant type and is provided with a PTC heater, the PTC heater can rapidly heat the refrigerant when the low-temperature vehicle is just started, the performance of the heat pump is recovered, and the battery pack and the passenger cabin are heated.

Description

Thermal management system and vehicle

Technical Field

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

Background

Along with the increasing popularization of new energy electric vehicles at present, the thermal management of the new energy electric vehicles is always an inexperienced topic. The battery, motor, and passenger cabin air conditioning thermal management system are related to the normal operation of the vehicle and the comfort of the occupants. At present, many new energy electric vehicles begin to heat by adopting a heat pump technology, and a heat pump system in the prior art has poor heating effect at low temperature and can not rapidly heat a battery pack and a passenger cabin.

Accordingly, there is a need to provide an improved thermal management system and vehicle that address the above-described issues.

Disclosure of Invention

The application provides a thermal management system and a vehicle, wherein the thermal management system can rapidly heat a battery pack and a passenger cabin during low-temperature starting.

The application discloses a thermal management system, which comprises a compressor branch, a refrigerant heat absorption pipeline group and a refrigerant heat dissipation pipeline group; the refrigerant heat absorption pipeline group comprises a motor cooling branch, a battery cooling branch and an air conditioner cooling branch; the refrigerant heat dissipation pipeline group, the battery heating branch and the air conditioner heating branch; the refrigerant heat absorption pipeline group is connected in parallel between the outflow end of the refrigerant heat dissipation branch and the inflow end of the compressor branch; the refrigerant heat dissipation pipeline group is connected in parallel between the outflow end of the compressor branch and the inflow end of the motor cooling branch; and a PTC heater is arranged on the motor cooling branch.

Further, the refrigerant heat absorption pipeline group further comprises a charger cooling branch; the charger cooling branch is connected between the outflow end of the refrigerant heat dissipation branch and the inflow end of the compressor branch.

Further, the inflow ends of the motor cooling branch, the battery cooling branch air-conditioning cooling branch and the charger cooling branch are respectively provided with an electronic expansion valve for controlling the circulation of the refrigerant.

Further, a compressor is arranged on the compressor branch; the input port of the compressor is provided with a pressure sensor, and the output port of the compressor is provided with a temperature sensor; and an air conditioner condenser is arranged on the refrigerant heat dissipation branch.

Further, the motor cooling branch is provided with a motor; the PTC heater is located between the motor and the compressor; the PTC heater is a low voltage PTC heater.

Further, a controller is arranged between the motor and the motor cooling branch; the controller controls operation of the motor.

Further, the thermal management system includes a battery pack; the battery cooling branch and the battery heating branch are connected with a battery pack; the charger cooling branch circuit is provided with a charger, and the charger is an on-vehicle charger.

Further, the air conditioner refrigerating branch is provided with an evaporator; the air conditioner heating branch is provided with a warm air core body.

Further, the refrigerant heat dissipation branch, the battery heating branch and the air conditioner heating branch are respectively provided with electromagnetic valves to control the on-off of the pipeline.

The application also discloses a vehicle comprising a thermal management system as described above.

Compared with the prior art, the heat management system is a refrigerant type and is provided with the PTC heater, the PTC heater can rapidly heat the refrigerant when the low-temperature vehicle is just started, the performance of the heat pump is recovered, and the heat pump supplies heat for the battery pack and the passenger cabin.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and together with the description, serve to explain the principles of the specification.

FIG. 1 is a schematic diagram of a thermal management system of the present application.

Reference numerals illustrate: a compressor branch, 100; a refrigerant heat radiation branch circuit 200; a motor cooling branch circuit 300; a motor 310; PTC heater 320; a controller, 330; a battery cooling branch 400; an air conditioner refrigerating branch circuit 500; a charger cooling branch, 600; a charger, 610; a battery warming branch, 700; air conditioning thermal branches 800; battery pack, 10.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.

The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

Next, embodiments of the present specification will be described in detail.

As shown in fig. 1, the heat management system of the present application includes a compressor branch 100, a refrigerant heat absorption pipeline set, and a refrigerant heat dissipation pipeline set.

The refrigerant heat absorption pipeline group comprises a motor cooling branch 300, a battery cooling branch 400, an air conditioner cooling branch 500 and a charger cooling branch 600. The refrigerant heat dissipation pipeline group comprises a refrigerant heat dissipation branch circuit 200, a battery heating branch circuit 700 and an air conditioner heating branch circuit 800.

The refrigerant heat absorption pipeline group is connected in parallel between the outflow end of the refrigerant heat dissipation branch 200 and the inflow end of the compressor branch 100. The refrigerant heat dissipation pipe set is connected in parallel between the outflow end of the compressor branch 100 and the inflow end of the motor cooling branch 300.

The inflow ends of the motor cooling branch 300, the battery cooling branch 400, the air conditioner cooling branch 500 and the charger cooling branch 600 are respectively provided with an electronic expansion valve to control the flow of the refrigerant, and the temperature of the refrigerant is reduced after the refrigerant passes through the electronic expansion valves, so that the electronic components in each branch are cooled. Solenoid valves are arranged on the refrigerant heat radiation branch 200, the battery heating branch 700 and the air conditioner heating branch 800 to control the on-off of pipelines. The high temperature refrigerant flows into the branch through the solenoid valve, thereby radiating the refrigerant and heating the passenger compartment and the battery pack 10.

The compressor branch 100 is provided with a compressor, a pressure sensor and a temperature sensor. The pressure sensor is positioned at one side of the compressor close to the inflow end, and the temperature sensor is positioned at one side of the compressor close to the outflow end. The refrigerant is compressed by the compressor and then is in a high-temperature and high-pressure state.

The first electromagnetic valve and the air conditioner condenser are sequentially arranged on the refrigerant heat dissipation branch 200, the first electromagnetic valve controls the high-temperature and high-pressure refrigerant to flow into the refrigerant heat dissipation branch 200, and the high-temperature and high-pressure refrigerant reaches the air conditioner condenser to dissipate heat and is changed into a low-temperature and high-pressure refrigerant.

The motor cooling branch 300 is sequentially provided with an electronic expansion valve I, a controller 330 and a refrigerant direct cooling type motor 310. The controller 330 is used to control the operation of the motor 310. The refrigerant flows out from the air conditioner condenser, passes through the electronic expansion valve I and then cools the controller 330, then passes through the refrigerant flow channel arranged on the motor 310 to cool the motor 310, and finally carries the heat of the controller 330 and the motor 310 back to the compressor to realize heat recovery. A PTC heater 320 is disposed between the motor 310 and the compressor, the PTC heater 320 is a low-voltage PTC heater, and the PTC heater 320 is used for heating the refrigerant in the pipeline.

The inflow end of the battery cooling branch 400 is provided with a second electronic expansion valve. The battery cooling branch 400 is connected to the battery pack 10. The refrigerant flows out from the air conditioner condenser, reaches the battery pack 10 after passing through the electronic expansion valve II to take away the heat of the battery pack 10, and reaches the compressor to complete circulation.

The air conditioner refrigeration branch 500 is provided with an electronic expansion valve III and an evaporator in sequence. The refrigerant flows out from the air conditioner condenser, and reaches the evaporator after passing through the electronic expansion valve III. The refrigerant absorbs heat in the evaporator to release cold air, and the cold air enters the passenger cabin through the air outlet of the air conditioner to refrigerate the passenger cabin. The refrigerant flows through the evaporator and then reaches the compressor to complete circulation.

The charger cooling branch 600 is provided with an electronic expansion valve four and a charger 610 in sequence. The charger 610 is an on-board charger for charging the battery pack 10. The temperature of the charger 610 increases when the vehicle is charged, thereby affecting the charging efficiency and the charging safety. The refrigerant flows out from the air conditioner condenser and reaches the charger 610 through the electronic expansion valve IV, so that the temperature of the charger 610 is reduced, the vehicle maintains higher charging efficiency, and the charging safety is ensured.

The inflow end of the battery heating branch 700 is provided with a second electromagnetic valve. The battery warming branch 700 is connected to the battery pack 10. The refrigerant flows out from the compressor, reaches the battery pack 10 after passing through the electromagnetic valve II, and transfers heat to the battery pack 10 so as to heat the battery pack.

The air conditioning heating branch 800 is provided with a third electromagnetic valve and a warm air core in sequence. The refrigerant flows out from the compressor and then reaches the warm air core through the electromagnetic valve III. The refrigerant emits hot air through heat emission in the warm air core body, and the hot air enters the passenger cabin through the air outlet of the air conditioner to heat the passenger cabin.

The heat management system adopts the direct cooling type motor 310 of the refrigerant to be connected with a refrigerant pipeline, so that the refrigerant can directly cool the motor 310 and heat recovery is realized. The mode has high heat exchange efficiency and low heat loss, greatly improves the continuous power of the motor 310 at high temperature, improves the heat recovery utilization rate of the motor 310 at low temperature, and can recover the performance of the heat pump more quickly.

The present application provides a low voltage PTC heater between the motor 310 and the compressor. The PTC heater 320 can rapidly heat the refrigerant flowing into the compressor at the time of starting the vehicle at a low temperature, thereby rapidly recovering the heat pump performance and heating the passenger compartment and the battery pack 10.

The cooling liquid radiator, the water pump and the cooling liquid pipeline are not required to be arranged, so that the arrangement difficulty of the whole vehicle heat management pipeline is reduced, the size of the heat management system is reduced, and the weight of a vehicle body is reduced. The charger 610 and the controller 330 are integrated into a thermal management system, and are cooled by using a refrigerant, so that an additional heat dissipation device is not required to be added to the vehicle.

The application also discloses a vehicle, which comprises the thermal management system. The vehicle comprises five running modes, namely a high Wen Hangche mode, a normal temperature running mode, a low temperature cold starting mode and a parking charging mode.

In the high-temperature driving mode, the battery pack 10 and the motor 310 need to be cooled, and the passenger compartment needs to be refrigerated. At this time, the compressor works, the second electromagnetic valve is closed, the third electromagnetic valve is closed, the first electromagnetic valve is opened, and the low-pressure PTC heater is closed. The controller 330 and the motor 310 are cooled by opening the electronic expansion valve II, the battery pack 10 is cooled by opening the electronic expansion valve II, and the passenger cabin is cooled by opening the electronic expansion valve III. Because the temperature of the refrigerant passing through the expansion valve is-10 ℃, the motor 310 can be effectively cooled, and the continuous power and the continuous torque of the motor 310 are greatly improved.

In normal temperature mode, the passenger compartment does not need to be refrigerated, the battery pack 10 is cooled as needed, and the motor 310 is cooled. At this time, the compressor is operated, the second solenoid valve is closed, the third solenoid valve is closed, the first solenoid valve is opened, the low-pressure PTC heater is closed, and the electronic expansion valve is opened to cool the controller 330 and the motor 310. When the temperature of the battery pack 10 is detected to exceed the set value, the electronic expansion valve II is opened to cool the battery pack 10.

In the low-temperature driving mode, the passenger compartment and the battery pack 10 need to be heated, and the motor 310 needs to be cooled. At this time, the first electromagnetic valve is closed, the second electromagnetic valve and the third electromagnetic valve are opened, the compressor works, and the low-pressure PTC heater is closed. The compressed high-temperature refrigerant reaches the battery pack 10 through the second electromagnetic valve to heat the battery pack 10; and meanwhile, the high-temperature refrigerant reaches the warm air core body through the electromagnetic valve III to heat the passenger cabin. After the refrigerant passes through the warm air core and the battery pack 10, the first electronic expansion valve is opened, and the refrigerant passes through the controller 330 and the motor 310 in sequence, so that the temperature and heat recovery of the controller 330 and the motor 310 are performed. Because the refrigerant and the motor directly exchange heat, the temperature difference is larger, and the heat recovery efficiency is higher. The refrigerant then carries the heat from the controller 330 and motor 310 to the compressor to participate in the cycle again.

In the low temperature cold start mode, both the battery pack 10 and the passenger compartment are in need of heating. At this time, the ambient temperature is too low and the heat pump hardly works. At this time, the compressor works, the first electromagnetic valve is closed, and the second electromagnetic valve and the third electromagnetic valve are opened. The low-pressure PTC heater starts the refrigerant in the heating pipeline, and the refrigerant carries PTC heat to the compressor to participate in circulation, so as to heat the battery pack 10 and the passenger cabin.

The temperature of the refrigerant passing through the first electronic expansion valve is about minus 10 ℃, and the refrigerant only needs to be heated to above minus 10 ℃, so that the low-pressure PTC heater is adopted to sufficiently meet the performance requirement. After the refrigerant is heated by the PTC heater 320, the heat pump function can be quickly recovered, thereby quickly heating the passenger compartment and the battery pack 10.

In the stop charge mode, when the temperature of the charger 610 or the battery pack 10 exceeds a set value, the first solenoid valve is opened, the second solenoid valve is closed, the third solenoid valve is closed, and the compressor is operated. When the temperature of the battery pack 10 exceeds a set value, the electronic expansion valve II is opened to cool the battery pack 50. When the temperature of the charger 610 exceeds the set value, the electronic expansion valve is opened to cool the charger 610.

The foregoing description is only a preferred embodiment of the present application, and is not intended to limit the utility model to the particular embodiment disclosed, but is not intended to limit the utility model to the particular embodiment disclosed, as any and all modifications, equivalent to the above-described embodiment, may be made by one skilled in the art without departing from the scope of the utility model.

Claims

1. A thermal management system, comprising: the compressor comprises a compressor branch, a refrigerant heat absorption pipeline group and a refrigerant heat dissipation pipeline group; the refrigerant heat absorption pipeline group comprises a motor cooling branch, a battery cooling branch and an air conditioner cooling branch; the refrigerant heat dissipation pipeline group comprises a refrigerant heat dissipation branch, a battery heating branch and an air conditioner heating branch; the refrigerant heat absorption pipeline group is connected in parallel between the outflow end of the refrigerant heat dissipation branch and the inflow end of the compressor branch; the refrigerant heat dissipation pipeline group is connected in parallel between the outflow end of the compressor branch and the inflow end of the motor cooling branch; and a PTC heater is arranged on the motor cooling branch.

2. The thermal management system of claim 1, wherein the refrigerant heat absorption line set further comprises a charger cooling branch; the charger cooling branch is connected between the outflow end of the refrigerant heat dissipation branch and the inflow end of the compressor branch.

3. The thermal management system of claim 2, wherein the inflow ends of the motor cooling branch, the battery cooling branch, the air conditioning cooling branch and the charger cooling branch are respectively provided with an electronic expansion valve for controlling the circulation of refrigerant.

4. A thermal management system according to claim 3, wherein a compressor is provided on the compressor branch; the input port of the compressor is provided with a pressure sensor, and the output port of the compressor is provided with a temperature sensor; and an air conditioner condenser is arranged on the refrigerant heat dissipation branch.

5. The thermal management system of claim 4, wherein the motor cooling branch is provided with a refrigerant direct-cooling motor; the PTC heater is located between the motor and the compressor; the PTC heater is a low voltage PTC heater.

6. The thermal management system of claim 4, wherein a controller is disposed between the motor and the motor cooling branch; the controller controls operation of the motor.

7. The thermal management system of claim 2, wherein the thermal management system comprises a battery pack; the battery cooling branch and the battery heating branch are connected with a battery pack; the charger cooling branch circuit is provided with a charger, and the charger is an on-vehicle charger.

8. The thermal management system of claim 1, wherein the air conditioning refrigeration branch is provided with an evaporator; the air conditioner heating branch is provided with a warm air core body.

9. The thermal management system of claim 1, wherein solenoid valves are respectively disposed on the refrigerant heat dissipation branch, the battery heating branch and the air conditioner heating branch to control on-off of the pipeline.

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