CN109747369A

CN109747369A - Thermal management system of electric automobile, method and device

Info

Publication number: CN109747369A
Application number: CN201711073061.0A
Authority: CN
Inventors: 胡浩茫; 莫维; 赵晓鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2019-05-14
Anticipated expiration: 2037-11-03
Also published as: CN109747369B

Abstract

This application discloses a kind of thermal management system of electric automobile, method and device, belong to electric vehicle engineering field.The first end of compressor in the system is connect by reversal valve with vehicle external heat exchanger, is equipped with shut-off valve with the connecting path of the vehicle external heat exchanger；Second end is connect by reversal valve with battery heat exchanger, and connecting path is equipped with shut-off valve；Vehicle external heat exchanger is successively connect with electric heater and heat exchanger；Heat exchanger is connect by expansion valve with battery heat exchanger, and heat exchanger is in parallel with dynamical system liquid cooling loop by triple valve；System realizes the heat management to battery by control reversal valve, each shut-off valve and each expansion valve.And during heat management, vehicle external heat exchanger is heated by control triple valve and/or electric heater when needing to heat vehicle external heat exchanger.The application can achieve defrosting effect, enable vehicle external heat exchanger steady operation, to guarantee stable system performance, improve heat management efficiency.

Description

Thermal management system of electric automobile, method and device

Technical field

This application involves electric vehicle engineering field, in particular to a kind of thermal management system of electric automobile, method and device.

Background technique

Compared with conventional fuel oil automobile, since electric car uses battery as power source, there is energy conservation and environmental protection The features such as, become a kind of trend of development of automobile.In practical application scene, it usually needs in cabin, battery and dynamical system Heat management is carried out Deng management object, so that the temperature of these objects maintains in the operating temperature range that can be run, for example, the heat Management includes cooling and heating management, wherein the dynamical system includes but is not limited to motor, electric machine controller, power device.

In the related art, in order to realize the heat management of electric car, a kind of thermal management system of electric automobile is provided, such as Shown in Figure 1A, which mainly includes compressor 01, vehicle external heat exchanger 02, expansion valve 03, interior heat exchanger 04, battery 05, electricity Pond heat exchanger 06, four-way reversing valve 07 and multiple shut-off valves.Wherein, one end of the compressor 01 by four-way reversing valve 07 with Vehicle external heat exchanger 02 connects, and the other end is connect by four-way reversing valve 07 with battery 05 and interior heat exchanger 04；It exchanges heat outside the vehicle Device 02 is connect by expansion valve 03 with interior heat exchanger 04, and is connect by expansion valve 03 and shut-off valve with battery 05.

In the concrete realization, when being both needed to refrigeration in battery and cabin, going out for compressor 01 is controlled by four-way reversing valve 07 Mouth is connect with vehicle external heat exchanger 02, in this way, the refrigerant of the high temperature and pressure come out from the compressor 01 passes through vehicle external heat exchanger 02 After cooling, become the refrigerant of low-temp low-pressure into expansion valve 03, which respectively enters 04 He of interior heat exchanger in cabin The battery heat exchanger 06 of battery 05, to absorb in cabin and the heat of battery, to achieve the effect that refrigeration；When equal in battery and cabin When need to heat, it is connect respectively with battery 05 and interior heat exchanger 04 by the outlet that four-way reversing valve 07 controls compressor 01, such as This, the refrigerant of the high temperature and pressure come out from compressor 01 passes through the battery heat exchanger in interior heat exchanger 04 and battery 05 respectively After 06 release heat, then successively pass through expansion valve 03 and vehicle external heat exchanger 02, becomes low after absorbing heat from vehicle external heat exchanger 02 The gas of pressure returns in compressor 01, to be heated in cabin with battery by heat conveying.In this way, realizing electronic The heat management of automobile.

However, in the heat management system of above-mentioned offer, when ambient temperature is lower, e.g., in winter under environment, outside vehicle Heat exchanger can lead to not steady operation because of frosting, in this way, system performance is caused to decline, heat management efficiency is reduced.

Summary of the invention

This application provides a kind of thermal management system of electric automobile, method and device, for solving in the prior art when outer Vehicle external heat exchanger can lead to not steady operation because of frosting when boundary's environment temperature is lower, so as to cause system performance decline, heat pipe Manage the problem of efficiency reduces.The technical solution is as follows:

In a first aspect, a kind of thermal management system of electric automobile is provided, compressor, reversal valve, vehicle external heat exchanger, multiple sections Only valve, battery heat exchanger, electric heater, heat exchanger, multiple expansion valves, dynamical system liquid cooling loop and triple valve, wherein institute Battery heat exchanger is stated in battery, the multiple shut-off valve includes the first shut-off valve and the second shut-off valve；

The first end of the compressor is connect by the reversal valve with the vehicle external heat exchanger, and is exchanged heat with outside the vehicle The access of device connection is equipped with first shut-off valve；The second end of the compressor is changed by the reversal valve and the battery Hot device connection, and the connecting path of the second end of the compressor and the battery heat exchanger is equipped with second shut-off valve； The vehicle external heat exchanger is successively connect with the electric heater and the heat exchanger；The heat exchanger passes sequentially through described more The first expansion valve and the second expansion valve in a expansion valve are connect with the battery heat exchanger, and the heat exchanger is described in Triple valve is in parallel with the dynamical system liquid cooling loop；

The system is by adjusting the flow direction of refrigerant in the reversal valve and controlling each shut-off valve and each expansion Valve opens or closes the heat management realized to the battery, and during heat management, when needs are to the vehicle external heat exchanger When being heated, the access between the dynamical system liquid cooling loop and the heat exchanger is got through by controlling the triple valve The vehicle external heat exchanger is heated, and/or, the vehicle external heat exchanger added by controlling the electric heater Heat.

In embodiments of the present invention, when ambient temperature is lower leads to vehicle external heat exchanger frosting, control can be passed through Waste heat in dynamical system liquid cooling loop is passed to vehicle external heat exchanger to heat to the vehicle external heat exchanger by triple valve, and/ Or, being heated by controlling electric heater to the vehicle external heat exchanger, to have the function that defrosting, so that the vehicle external heat exchanger Work that can be stable, to guarantee stable system performance, in this way, improving the heat management efficiency of electric car.

Further, the system also includes interior heat exchanger, the car heat exchanger is set in cabin, and the reversal valve is Four-way reversing valve；The second end of the compressor also passes through the four-way reversing valve and connect with the interior heat exchanger；The heat Exchanger also passes sequentially through third expansion valve and the interior heat exchanger in first expansion valve and the multiple expansion valve Connection.

Further, the multiple shut-off valve further includes third shut-off valve and the 4th shut-off valve；The first of the compressor End is also connect by the four-way reversing valve with the battery heat exchanger, and the first end of the compressor and the battery exchange heat Device connection access be equipped with the third shut-off valve, the second end of the compressor also pass through the four-way reversing valve with it is described The connection of vehicle external heat exchanger, and the connecting path of the second end of the compressor and the vehicle external heat exchanger is equipped with described 4th section Only valve.At this point, system is by adjusting the flow direction of refrigerant in the reversal valve and controlling each shut-off valve and each expansion valve Open or close, can also realize to the heat management in cabin.

Second aspect provides a kind of thermal management system of electric automobile, and the system comprises outside: compressor, reversal valve, vehicle Heat exchanger, the first shut-off valve, interior heat exchanger, electric heater, heat exchanger, multiple expansion valves, dynamical system liquid cooling loop and Triple valve, wherein the car heat exchanger is set in cabin；

The first end of the compressor is connect by the reversal valve with the vehicle external heat exchanger, and is exchanged heat with outside the vehicle The access of device connection is equipped with first shut-off valve；The second end of the compressor is changed by the reversal valve and the car Hot device connection；The vehicle external heat exchanger is successively connect with the electric heater and the heat exchanger；The heat exchanger is successively It is connect by the first expansion valve in the multiple expansion valve and the second expansion valve with the interior heat exchanger, and the heat exchange Device is in parallel with the dynamical system liquid cooling loop by the triple valve.

In addition, the system by adjust in the reversal valve flow direction of refrigerant and control first shut-off valve and Each expansion valve opens or closes realization to the heat management in the cabin, and during heat management, when needs are to the vehicle When external heat exchanger is heated, the access between dynamical system liquid cooling loop and heat exchanger is got through by controlling the triple valve Vehicle external heat exchanger is heated, and/or, vehicle external heat exchanger heated by controlling electric heater.

Further, the system also includes battery heat exchanger, the second shut-off valve and third shut-off valve, the battery heat exchange Device is set in battery, and the reversal valve is four-way reversing valve.

The first end of the compressor also passes through the four-way reversing valve and connect with the battery heat exchanger, and the compression The connecting path of the first end of machine and the battery heat exchanger is equipped with the second shut-off valve；The second end of the compressor also passes through Four-way reversing valve is connect with the battery heat exchanger, and the connecting path of the second end of the compressor and the battery heat exchanger It is equipped with the third shut-off valve；The heat exchanger also passes sequentially through in first expansion valve and the multiple expansion valve Third expansion valve is connect with the battery heat exchanger.

Further, the system also includes the 4th shut-off valve, the second end of the compressor also passes through the four-way and changes It is connect to valve with the vehicle external heat exchanger, and the second end of the compressor and the connecting path of the vehicle external heat exchanger are equipped with 4th shut-off valve.At this point, system by adjust in the reversal valve flow direction of refrigerant and each shut-off valve of control and Each expansion valve opens or closes, and can also realize the heat management to battery.

The third aspect provides a kind of electric car thermal management algorithm, applied in system described in above-mentioned first aspect, The described method includes:

The object detection temperature of object to be managed is obtained, the object to be managed includes battery；

It is poor based on the object detection temperature, object set temperature and object preset temperature, adjust entering for the compressor The connection type of mouth and outlet, and the open and close of each shut-off valve and each expansion valve are controlled, the compressor is for mentioning For refrigerant；

Start the compressor, to utilize the refrigerant for exporting outflow and finally flow back to the entrance from the compressor Heat management is carried out to the object to be managed, and during heat management, detects whether to need to carry out the vehicle external heat exchanger Heating；

When needing to heat the vehicle external heat exchanger, controls the triple valve and get through the dynamical system liquid cooling ring Access between road and the heat exchanger heats the vehicle external heat exchanger, and/or, control the electric heater pair The vehicle external heat exchanger is heated.

In embodiments of the present invention, the connection type of the entrance and exit of compressor is adjusted based on actual demand, and is controlled The open and close of each shut-off valve and each expansion valve start compressor work later, to utilize the height come out from compressor The refrigerant of warm high pressure carries out heat management to object to be managed.Also, during heat management, need to change vehicle outside when detecting When hot device is heated, can by control triple valve by the waste heat in dynamical system liquid cooling loop pass to vehicle external heat exchanger with The vehicle external heat exchanger is heated, and/or, the vehicle external heat exchanger is heated by controlling electric heater, to reach The effect of defrosting, the work for enabling the vehicle external heat exchanger stable, to guarantee stable system performance, in this way, improving electronic The heat management efficiency of automobile.

Optionally, the object detection temperature includes battery detecting temperature, and the object set temperature includes battery work Temperature, the battery operating temperature include maximum operating temperature and minimum operating temperature, and the object preset temperature difference includes electricity Pond preset temperature is poor；

It is described poor based on the object detection temperature, object set temperature and object preset temperature, adjust entering for compressor The connection type of mouth and outlet, and control the open and close of each shut-off valve and each expansion valve, comprising:

When the difference between the minimum operating temperature and the battery detecting temperature is poor greater than the battery preset temperature When, it adjusts the reversal valve and the first end of the compressor is made to be entrance, the second end of the compressor is outlet, and is opened First shut-off valve, second shut-off valve, first expansion valve and second expansion valve.

When the difference between the minimum operating temperature and the battery detecting temperature is poor greater than the battery preset temperature When, illustrate the current temperature of battery lower than the minimum temperature worked normally, therefore, it is necessary to heat to battery, for this purpose, adjusting The reversal valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet, and opens described the One shut-off valve, second shut-off valve, first expansion valve and second expansion valve.In this way, after starting compressor, compression Machine acting, and battery heat exchanger is flowed through from the refrigerant that outlet extrudes high temperature and pressure, battery heat exchanger absorbs heat, to realize Battery is heated.

Optionally, described during heat management, it detects whether to need to heat the vehicle external heat exchanger, comprising:

Detect the inlet pressure of the compressor；

If the inlet pressure of the compressor is less than minimum operating pressures that, it is determined that need to carry out the vehicle external heat exchanger Heating, the minimum operating pressures that refer to the minimum inlet pressure that the compressor works normally.

In embodiments of the present invention, it based on the inlet pressure of compressor, detects whether to need to add vehicle external heat exchanger Heat ensure that the accuracy of detection.

Optionally, described when needing to heat the vehicle external heat exchanger, it controls the triple valve and gets through described move Access between Force system liquid cooling loop and the heat exchanger heats the vehicle external heat exchanger, and/or, control institute Electric heater is stated to heat the vehicle external heat exchanger, comprising:

Obtaining the first temperature and second temperature, first temperature refers to the inlet temperature of the triple valve, described second Temperature refers to the temperature between the heat exchanger and first expansion valve；

If the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is greater than described second Temperature then controls access of the triple valve bypass to get through between the dynamical system liquid cooling loop and the heat exchanger, And the waste heat of the cold pipeline of dynamical system heat is passed to come outside to the vehicle by the vehicle outer heat-exchanger by the heat exchanger Exchanger is heated；

If the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is less than described second Temperature then starts the electric heater, to be heated by the electric heater to the vehicle external heat exchanger.

In embodiments of the present invention, according to the inlet pressure of compressor, the inlet temperature of triple valve and heat exchanger and Temperature between one expansion valve, determination are to need to heat vehicle external heat exchanger by controlling triple valve, it is desired nonetheless to be passed through Control electric heater heats vehicle external heat exchanger, improves the flexibility of control.

Optionally, after the control triple valve bypass, further includes:

If the inlet pressure of the compressor is continuously less than the minimum operating pressures that and duration reaches preset duration, Start the electric heater, then to carry out auxiliary heating to the vehicle external heat exchanger by the electric heater.

In embodiments of the present invention, detect the waste heat in dynamical system liquid cooling loop be not enough to vehicle external heat exchanger into When row sufficiently heats, electric heater can star, to carry out auxiliary heating to the vehicle external heat exchanger by electric heater, thus right Vehicle external heat exchanger is sufficiently heated, and guarantees sufficiently to defrost to vehicle external heat exchanger.

Optionally, the system also includes interior heat exchanger, the car heat exchanger is set in cabin, and the reversal valve is four Logical reversal valve；The second end of the compressor also passes through the four-way reversing valve and connect with the interior heat exchanger；The heat is handed over Parallel operation also passes sequentially through third expansion valve and the interior heat exchanger company in first expansion valve and the multiple expansion valve It connects；The multiple shut-off valve further includes third shut-off valve and the 4th shut-off valve；The first end of the compressor also passes through described four Logical reversal valve is connect with the battery heat exchanger, and on the access that connect with the battery heat exchanger of the first end of the compressor Equipped with the third shut-off valve, the second end of the compressor also passes through the four-way reversing valve and the vehicle external heat exchanger connects It connects, and the connecting path of the second end of the compressor and the vehicle external heat exchanger is equipped with the 4th shut-off valve；

The object to be managed further includes in the cabin, and the object detection temperature includes that temperature and battery inspection are detected in cabin Testing temperature, the object set temperature include set temperature and battery operating temperature in cabin, and the battery operating temperature includes most Elevated operating temperature and minimum operating temperature, the object preset temperature difference include preset temperature difference and battery preset temperature in cabin Difference；

Based on detecting temperature, the battery detecting temperature in the cabin, set temperature in the cabin, preset temperature in the cabin It spends poor, the described battery operating temperature and the battery preset temperature is poor, adjust the connection side of the entrance and exit of the compressor Formula, and control the open and close of each shut-off valve and each expansion valve.

It that is to say, when further including in cabin in system, the company of the entrance and exit of the adjusting compressor can also be passed through Mode is connect, and controls the open and close of each shut-off valve and each expansion valve come to carrying out heat management in the cabin.

Optionally, it is described based in set temperature in detection temperature in the cabin, the battery detecting temperature, cabin, cabin in advance If temperature difference, battery operating temperature and battery preset temperature are poor, the connection type of the entrance and exit of the compressor is adjusted, and Control the open and close of each shut-off valve and each expansion valve, comprising:

When detecting in set temperature in the cabin and the cabin, the difference between temperature is poor greater than preset temperature in the cabin, And the difference between the minimum operating temperature and the battery detecting temperature be greater than the battery preset temperature difference when, adjust institute Stating four-way reversing valve makes the first end of the compressor be entrance, and the second end is outlet；

The third shut-off valve and the 4th shut-off valve are closed, and opens first shut-off valve and second cut-off Valve, and open first expansion valve, second expansion valve and the third expansion valve.

In embodiments of the present invention, warm greater than being preset in cabin when detecting the difference between temperature in set temperature in cabin and cabin It is poor to spend, and when the difference between minimum operating temperature and battery detecting temperature is greater than battery preset temperature difference, illustrates in cabin and electric Pond is required to heat.The first end of compressor is made to be entrance for this purpose, adjusting four-way reversing valve, second end is outlet, closes the Three shut-off valves and the 4th shut-off valve, and the first shut-off valve and the second shut-off valve are opened, and open the first expansion valve, the second expansion Valve and third expansion valve.At this point, the refrigerant of the high temperature and pressure extruded from compressor outlet is into the car after starting compressor Heat exchanger and battery heat exchanger to heat to interior heat exchanger and battery heat exchanger, and then are realized in cabin and battery It is heated, later, throttles, converge successively through over-heat-exchanger, electric heating by third expansion valve and the second expansion valve respectively Device and vehicle external heat exchanger return to compressor.In this way, being entrance by the first end of control compressor, second end is outlet, and is controlled The open and close for making each shut-off valve and each expansion valve are realized in cabin and purpose that battery is heated.

Optionally, after the starting compressor, further includes:

Third temperature and the 4th temperature are obtained, the third temperature refers to that the first end of the compressor is entrance, described The second end of compressor is the inlet temperature of the interior heat exchanger in the state of outlet and second shut-off valve unlatching, described 4th temperature refers to that the first end of the compressor is entrance, and the second end of the compressor is outlet and second shut-off valve The inlet temperature of the battery heat exchanger in the state of unlatching；

If the third temperature and/or the 4th temperature are in preset temperature range, the compressor is kept Revolving speed is constant；If the third temperature and/or the 4th temperature are lower than the preset temperature range, increase the compressor Revolving speed；If the third temperature and/or the 4th temperature are higher than the preset temperature range, the compressor is reduced Revolving speed.

In embodiments of the present invention, it is required under the scene of heating in cabin with battery, if the entrance of interior heat exchanger Temperature and/or the inlet temperature of battery heat exchanger are in preset temperature range, illustrate in cabin and battery heating effect compared with It is good, at this point it is possible to keep the revolving speed of compressor constant；But if the inlet temperature and/or battery heat exchanger of interior heat exchanger Inlet temperature lower than in preset temperature range, illustrating in cabin and the degree of heat of battery is inadequate, for this purpose, compression can be increased The revolving speed of machine, so that compressor extrudes the refrigerant of more high temperature and pressure, to reach in cabin and battery sufficiently heats Effect；In addition, if the inlet temperature of interior heat exchanger and/or the inlet temperature of battery heat exchanger are higher than preset temperature range It is interior, illustrate to have been over actual requirement to the degree heated in cabin with battery, at this point it is possible to the revolving speed of compressor is reduced, with The amount of the refrigerant for the high temperature and pressure that compressor extrudes is reduced, so that moderate with the degree of heat of battery in cabin.It is above-mentioned To in cabin and during battery heats, adjusted by adjusting the revolving speed of compressor in cabin and the journey of battery heating Degree, improves heat management efficiency.

When detecting in set temperature in the cabin and the cabin, the difference between temperature is poor greater than preset temperature in the cabin, And the difference between the battery detecting temperature and the maximum operating temperature be greater than the battery preset temperature difference when, adjust institute Stating four-way reversing valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet；

First shut-off valve, second shut-off valve and the 4th shut-off valve are closed, and opens the third and cuts Only valve, and first expansion valve is closed, open second expansion valve and the third expansion valve.

In embodiments of the present invention, when the difference detected between temperature in set temperature in the cabin and the cabin is greater than institute State that preset temperature in cabin is poor, and to be greater than the battery pre- for the difference between the battery detecting temperature and the maximum operating temperature If when temperature difference, illustrating to need to heat in cabin, battery needs to freeze.For this purpose, adjusting four-way reversing valve makes the first of compressor End is entrance, and second end is outlet, closes first shut-off valve, second shut-off valve and the 4th shut-off valve, and The third shut-off valve is opened, and closes first expansion valve, opens second expansion valve and the third expansion valve.Such as This, after starting compressor, the refrigerant heat exchanger into the car of the high temperature and pressure extruded from compressor outlet, in cabin into Row heating throttles by third expansion valve and the second expansion valve respectively later, flows through battery heat exchanger and return to compressor, with right Battery freezes.It is heated in this way, realizing in cabin, to the purpose of battery refrigeration.

Optionally, after the starting compressor, further includes:

The 5th temperature and the 6th temperature are obtained, the 5th temperature refers to that the first end of the compressor is entrance, described The second end of compressor is the inlet temperature of the battery heat exchanger in the state of outlet and second shut-off valve closing, described 6th temperature refers to that the first end of the compressor is entrance, and the second end of the compressor is outlet and second shut-off valve The inlet temperature of the car heat exchanger in the state of closing；

According to the 5th temperature, the 6th temperature, the first default inlet temperature, the second default inlet temperature and preset Temperature difference adjusts the open and close of the revolving speed and/or control each shut-off valve and each expansion valve of the compressor.

In embodiments of the present invention, to being heated in cabin, to battery refrigeration during, can also according to interior heat exchanger and The inlet temperature of battery heat exchanger adjusts the revolving speed of the compressor and/or controls opening for each shut-off valve and each expansion valve It opens and closes, so that the inlet temperature of interior heat exchanger and battery heat exchanger is all satisfied the inlet temperature of actual requirement, improve Heat management efficiency.

Optionally, it is described according to the 5th temperature, the 6th temperature, the first default inlet temperature, second preset into Mouth temperature and preset temperature are poor, adjust the unlatching of the revolving speed and/or control each shut-off valve and each expansion valve of the compressor With closing, comprising:

When poor, and the institute that is greater than the preset temperature of the difference between the 5th temperature and the first default inlet temperature When stating the difference between the second default inlet temperature and the 6th temperature greater than the preset temperature difference, increase the compressor Revolving speed, and continue to execute and obtain the 5th temperature and the step of six temperature, until the 5th temperature is default with described first It is poor that difference between inlet temperature is less than the preset temperature, and between the second default inlet temperature and the 6th temperature Difference be less than the preset temperature difference when, keep the revolving speed of the compressor constant.

In embodiments of the present invention, in the concrete realization, when between above-mentioned 5th temperature and the first default inlet temperature Difference be greater than preset temperature it is poor, and the difference between the second default inlet temperature and the 6th temperature be greater than preset temperature difference when, say The inlet temperature of bright battery is also higher than the inlet temperature of actual requirement, and the inlet temperature of battery entering lower than actual requirement Mouthful, for this purpose, the revolving speed of compressor can be increased, with to sufficiently being heated in cabin, and sufficiently freezed to battery.Until The inlet temperature of interior heat exchanger and the inlet temperature of actual requirement is close and the inlet temperature of battery heat exchanger be actually subjected to When the inlet temperature asked is close, illustrate to reach moderate to heating in cabin and to the effect of battery refrigeration, at this point it is possible to guarantee to press The revolving speed of contracting machine is constant, in this way, improving the heat management efficiency of electric car.

Optionally, after the revolving speed for keeping the compressor is constant, further includes:

When poor, and the institute that is greater than the preset temperature of the difference between the 5th temperature and the first default inlet temperature When stating the absolute value of the difference of the 6th temperature and the described second default inlet temperature less than the preset temperature difference, the third is opened Shut-off valve and the 4th shut-off valve close first shut-off valve and second shut-off valve, and open first expansion Valve, second expansion valve and the third expansion valve.

In embodiments of the present invention, when the difference between above-mentioned 5th temperature and the first default inlet temperature is greater than default temperature It is poor to spend, and when the absolute value of the difference of the 6th temperature and the second default inlet temperature is less than preset temperature difference, illustrates the system to battery Cold strength is inadequate, but has reached to the heating intensity in cabin moderate.At this point it is possible to third shut-off valve and the 4th shut-off valve are opened, The first shut-off valve and the second shut-off valve are closed, and opens the first expansion valve, the second expansion valve and third expansion valve, by outside vehicle Branch where heat exchanger reinforces the refrigeration degree to battery, so that the inlet temperature of battery is also close to actual requirement, in this way, improving The heat management efficiency of electric car.

Optionally, the unlatching third shut-off valve and the 4th shut-off valve close first shut-off valve and institute The second shut-off valve is stated, and after opening first expansion valve, second expansion valve and the third expansion valve, further includes:

Increase the aperture of first expansion valve；

When the aperture of first expansion valve is maximum, between the 5th temperature and the first default inlet temperature Difference be still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the described second default inlet temperature is still It is poor less than the preset temperature, increase the revolving speed of the compressor；

When poor, and the institute that is greater than the preset temperature of the difference between the described first default inlet temperature and the 5th temperature When stating the absolute value of the difference of the 6th temperature and the described second default inlet temperature less than the preset temperature difference, reduce described first The aperture of expansion valve；When the aperture of first expansion valve is minimum, the first default inlet temperature and the 5th temperature Difference between degree is still greater than that the preset temperature is poor, and the difference of the 6th temperature and the second default inlet temperature is exhausted It is poor still less than the preset temperature to being worth, reduce the revolving speed of the compressor；

When to be less than the preset temperature poor for the absolute value of the difference of the 5th temperature and the described first default inlet temperature, and When difference between 6th temperature and the second default inlet temperature is greater than the preset temperature, it is swollen to increase described first The aperture of swollen valve；When the aperture of first expansion valve is maximum, the 5th temperature and the described first default inlet temperature Absolute value of the difference it is poor still less than the preset temperature, and the difference between the 6th temperature and the second default inlet temperature Value is still greater than the preset temperature, reduces the revolving speed of the compressor；

When the absolute value of the difference of the 5th temperature and the described first default inlet temperature poor, the institute that is less than the preset temperature When stating the difference between the second default inlet temperature and the 6th temperature greater than the preset temperature difference, it is swollen to reduce described first The aperture of swollen valve.

In embodiments of the present invention, according to the difference relationship between the 5th temperature and the first default inlet temperature, Yi Ji Difference relationship between two default inlet temperatures and the 6th temperature adjusts the aperture of the first expansion valve and/or adjusts compressor Revolving speed, so that the 5th temperature is close to the first default inlet temperature, and the 6th temperature is protected close to the second default inlet temperature The inlet temperature of battery heat exchanger and interior heat exchanger is demonstrate,proved close to actual requirement, improves heat management efficiency.

Optionally, after the aperture for reducing first expansion valve, further includes:

When the absolute value of the difference of the 5th temperature and the described first default inlet temperature is poor still less than the preset temperature, And the difference between the second default inlet temperature and the 6th temperature is when being still greater than the preset temperature difference, described in unlatching First shut-off valve and the third shut-off valve close second shut-off valve and the 4th shut-off valve.

In embodiments of the present invention, after the aperture for reducing the first expansion valve, when the 5th temperature and the first default entrance temperature The absolute value of the difference of degree is poor still less than preset temperature, and the difference between the second default inlet temperature and the 6th temperature be still greater than it is pre- If when temperature difference, illustrating that the inlet temperature of battery is moderate, but the inlet temperature in cabin is far below actual requirement, at this time, it may be necessary to open The first shut-off valve and third shut-off valve are opened, and closes the second shut-off valve and the 4th shut-off valve, so that the refrigerant that compressor extrudes Interior heat exchanger all is flowed through, to the refrigerant a part warp for sufficiently being heated in cabin, also, being flowed out from interior heat exchanger Branch where crossing vehicle external heat exchanger flows back to compressor, so, it is ensured that do not influence to improve heat pipe to the refrigeration degree of battery Manage efficiency.

When detecting in the cabin, the difference in temperature and the cabin between set temperature is poor greater than preset temperature in the cabin, And the difference between the battery detecting temperature and the maximum operating temperature be greater than the battery preset temperature difference when, adjust institute Stating four-way reversing valve makes the second end of the compressor be entrance, and the first end of the compressor is outlet；

First shut-off valve and the second shut-off valve are opened, and closes the third shut-off valve and the 4th cut-off Valve, and open first expansion valve, second expansion valve and the third expansion valve.

In embodiments of the present invention, warm greater than being preset in cabin when detecting the difference in temperature and cabin between set temperature in cabin It is poor to spend, and when the difference between battery detecting temperature and maximum operating temperature is greater than battery preset temperature difference, illustrates in cabin and electric Pond is required to freeze.The second end of the compressor is made to be entrance for this purpose, adjusting four-way reversing valve, first end is outlet, is opened The first shut-off valve and the second shut-off valve are opened, and closes third shut-off valve and the 4th shut-off valve, and opens the first expansion valve, second Expansion valve and third expansion valve, at this point, the refrigerant of the high temperature and pressure extruded from compressor outlet passes through after starting compressor It is divided into two-way after vehicle external heat exchanger and passes through third expansion valve and the second expansion valve respectively, becomes the refrigerant of low temperature, and enter vehicle Interior heat exchanger and battery heat exchanger, to freeze in cabin with battery, last cryogenic gaseous refrigerant is merged together back To the entrance of compressor.In this way, being entrance by the second end of control compressor, first end is outlet, and controls each cut-off The open and close of valve and each expansion valve are realized in cabin and purpose that battery freezes.

Optionally, after the starting compressor, further includes:

The 7th temperature and the 8th temperature are obtained, the 7th temperature refers to that in the second end of the compressor be entrance, institute The first end for stating compressor is the inlet temperature of the interior heat exchanger in the state of outlet, and the 8th temperature refers to described The second end of compressor is entrance, and the first end of the compressor is the entrance temperature of the battery heat exchanger in the state of outlet Degree；

If the 7th temperature and/or the 8th temperature are in preset temperature range, the compressor is kept Revolving speed is constant；If the 7th temperature and/or the 8th temperature are lower than the preset temperature range, the compressor is reduced Revolving speed；If the 7th temperature and/or the 8th temperature are higher than the preset temperature range, increase the compressor Revolving speed.

In embodiments of the present invention, it is required under the scene of refrigeration in cabin with battery, if the entrance of interior heat exchanger Temperature and/or the inlet temperature of battery heat exchanger are in preset temperature range, illustrate in cabin and battery refrigeration effect compared with It is good, at this point it is possible to keep the revolving speed of compressor constant；But if the inlet temperature and/or battery heat exchanger of interior heat exchanger Inlet temperature lower than in preset temperature range, illustrating therefore, compression can be reduced in cabin and the refrigeration degree of battery is too strong The revolving speed of machine, so that the amount for the refrigerant that compressor extrudes is reduced, to reduce in cabin and the refrigeration degree of battery；Separately Outside, if the inlet temperature of interior heat exchanger and/or the inlet temperature of battery heat exchanger are higher than in preset temperature range, explanation is given In cabin and the degree of battery refrigeration is inadequate, at this point it is possible to increase the revolving speed of compressor, it is high to increase the high temperature extruded from compressor The amount of the refrigerant of pressure, so that enhancing is heated in cabin with the refrigeration of battery.It is above-mentioned in cabin and mistake that battery freezes Cheng Zhong, by adjust compressor revolving speed come adjust in cabin and battery refrigeration degree, improve heat management efficiency.

Fourth aspect, provides a kind of heat management device of electric car, and described device includes:

First obtains module, and for obtaining the object detection temperature of object to be managed, the object to be managed includes battery；

First adjusts control module, for being based on the object detection temperature, object set temperature and object preset temperature Difference, adjusts the connection type of the entrance and exit of the compressor, and control the unlatching of each shut-off valve and each expansion valve with It closes, the compressor is for providing refrigerant；

Starting module is flowed out from the outlet of the compressor with utilization for starting the compressor and finally flows back to institute The refrigerant for stating the entrance of compressor carries out heat management to the object to be managed, and during heat management, detects whether to need The vehicle external heat exchanger is heated；

Control module, for when needing to heat the vehicle external heat exchanger, control the triple valve get through it is described Access between dynamical system liquid cooling loop and the heat exchanger heats the vehicle external heat exchanger, and/or, control The electric heater heats the vehicle external heat exchanger.

The first adjusting control module is used for:

When the difference between the minimum operating temperature and the battery detecting temperature is poor greater than the battery preset temperature When, it adjusts the reversal valve and the first end of the compressor is made to be entrance, the second end of the compressor is outlet, and is opened First shut-off valve, first expansion valve and second expansion valve.

Optionally, the starting module is used for:

Detect the inlet pressure of the compressor；

Optionally, the control module is used for:

Optionally, the control module is also used to:

The first adjusting control module is used for:

Optionally, the first adjusting control module is used for:

When detecting in set temperature in the cabin and the cabin, the difference between temperature is poor greater than preset temperature in the cabin, And the difference between the minimum operating temperature and the battery detecting temperature be greater than the battery preset temperature difference when, adjust institute Stating four-way reversing valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet；

Third shut-off valve and the 4th shut-off valve are closed, and opens first shut-off valve and the second shut-off valve, and open First expansion valve, second expansion valve and third expansion valve.

Optionally, described device further include:

Second obtains module, and for obtaining third temperature and/or the 4th temperature, the third temperature refers to the compressor First end be entrance, the second end of the compressor is outlet and second shut-off valve open in the state of interior heat exchanger Inlet temperature, the 4th temperature refers to that the first end of the compressor is entrance, and the second end of the compressor is outlet And second shut-off valve open in the state of battery heat exchanger inlet temperature；

First rotational speed regulation module, if being in preset temperature range for the third temperature and/or the 4th temperature It is interior, then keep the revolving speed of the compressor constant；If the third temperature and/or the 4th temperature are lower than the preset temperature Range then increases the revolving speed of the compressor；If the 4th temperature and/or the 4th temperature are higher than the preset temperature model It encloses, then reduces the revolving speed of the compressor.

Optionally, the first adjusting control module is used for:

Optionally, described device further include:

Third obtains module, refers to the compressor for obtaining the 5th temperature and the 6th temperature, the 5th temperature First end is entrance, and the second end of the compressor is the battery heat exchange in the state of outlet and second shut-off valve closing The inlet temperature of device, the 6th temperature refer to that the first end of the compressor is entrance, and the second end of the compressor is The inlet temperature of mouth and second the shut-off valve interior heat exchanger in the state of closing；

Second adjusts control module, according to the 5th temperature, the 6th temperature, the first default inlet temperature, second Default inlet temperature and preset temperature are poor, adjust the revolving speed of the compressor and/or control each shut-off valve and each expansion valve Open and close.

Optionally, the second adjusting control module is used for:

Optionally, the second adjusting control module is also used to:

Optionally, the second adjustment control module further include:

Increase the aperture of first expansion valve；

Optionally, the second adjusting control module is also used to:

Optionally, first adjustment module is also used to:

Optionally, described device further include:

4th obtains module, refers to for obtaining the 7th temperature and/or the 8th temperature, the 7th temperature in the compression The second end of machine is entrance, and the first end of the compressor is the inlet temperature of the interior heat exchanger in the state of outlet, institute It states the 8th temperature and refers to that in the second end of the compressor be entrance, the first end of the compressor is described in the state of exporting The inlet temperature of battery heat exchanger；

Second rotational speed regulation module, if being in preset temperature range for the 7th temperature and/or the 8th temperature It is interior, then keep the revolving speed of the compressor constant；If the 7th temperature and/or the 8th temperature are lower than the preset temperature Range then reduces the revolving speed of the compressor；If the 7th temperature and/or the 8th temperature are higher than the preset temperature model It encloses, then increases the revolving speed of the compressor.

5th aspect, a kind of heat management device of electric car, described device includes: processor and memory；Wherein, described There is computer-readable program in memory；The processor is by running the program in the memory, for completing State any method of the third aspect.

6th aspect, provides a kind of computer readable storage medium, is stored in the computer readable storage medium Instruction, when run on a computer, so that computer executes electric car thermal management algorithm described in above-mentioned second aspect.

7th aspect, provides a kind of computer program product comprising instruction, when run on a computer, so that Computer executes electric car thermal management algorithm described in above-mentioned second aspect.

In above-mentioned fourth aspect, the 5th aspect, the 6th aspect and the 7th aspect technical effect obtained and the third aspect The technical effect that corresponding technological means obtains is approximate, repeats no more herein.

Technical solution provided by the present application has the benefit that the embodiment of the invention provides a kind of electric car heat Management system, the system pass through the flow direction of refrigerant in adjustable change valve and the unlatching of control each shut-off valve and each expansion valve Or close, it may be implemented to carry out heat management to battery.Also, during heat management, need when detecting to vehicle external heat exchanger When being heated, the access between dynamical system liquid cooling loop and heat exchanger can be got through by controlling triple valve, by power Waste heat in system liquid cooling loop passes to vehicle external heat exchanger to heat to the vehicle external heat exchanger, and/or, pass through control electricity Heater heats the vehicle external heat exchanger, thus have the function that defrosting, the work for enabling the vehicle external heat exchanger stable Make, to guarantee stable system performance, in this way, improving the heat management efficiency of electric car.

Detailed description of the invention

Figure 1A is a kind of thermal management system of electric automobile shown according to an exemplary embodiment；

Figure 1B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 1 C is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 1 D is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 1 E is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 2 is a kind of structural schematic diagram of computer equipment provided in an embodiment of the present invention；

Fig. 3 A is a kind of flow chart of electric car thermal management algorithm provided in an embodiment of the present invention；

Fig. 3 B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 3 C is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 4 A is a kind of flow chart of electric car thermal management algorithm provided in an embodiment of the present invention；

Fig. 4 B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 4 C is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 5 A is a kind of flow chart of electric car thermal management algorithm provided in an embodiment of the present invention；

Fig. 5 B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 6 A is a kind of flow chart of electric car thermal management algorithm provided in an embodiment of the present invention；

Fig. 6 B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 6 C is a kind of conservation of energy schematic diagram shown according to another exemplary embodiment；

Fig. 6 D is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 6 E is a kind of conservation of energy schematic diagram shown according to another exemplary embodiment；

Fig. 6 F is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 6 G is a kind of conservation of energy schematic diagram shown according to another exemplary embodiment；

Fig. 7 A is a kind of flow chart of electric car thermal management algorithm provided in an embodiment of the present invention；

Fig. 7 B is a kind of thermal management system of electric automobile shown according to another exemplary embodiment；

Fig. 8 A is a kind of structural schematic diagram of heat management device of electric car shown according to an exemplary embodiment；

Fig. 8 B is the structural schematic diagram of another heat management device of electric car shown according to an exemplary embodiment；

Fig. 8 C is the structural schematic diagram of another heat management device of electric car shown according to an exemplary embodiment；

Fig. 8 D is the structural schematic diagram of another heat management device of electric car shown according to an exemplary embodiment.

Specific embodiment

To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application embodiment party Formula is described in further detail.

Before describing in detail to the embodiment of the present invention, first to the present embodiments relate to application scenarios and implementation Environment is simply introduced.

Firstly, to the present embodiments relate to application scenarios simply introduced.

In real life, because usually there is battery operating temperature in the battery in electric car, the battery operating temperature Including maximum operating temperature and minimum operating temperature, therefore, it is necessary to the batteries to electric car to carry out heat management.Further, With the variation of outdoor temperature, people may have different needs temperature in cabin, for example, people usually require cabin in summer Interior temperature is more lower, freezes at this point, generally requiring in cabin；And in winter, people usually need in cabin again Temperature is higher, heats at this point, generally requiring in cabin.Therefore, in addition to needing the battery to electric car to carry out Except heat management, usually also need to carry out heat management in the cabin to electric car.

In addition, during heat management, it usually needs use the vehicle external heat exchanger of electric car.However, being answered some With in scene, especially in winter, when ambient temperature is lower, vehicle external heat exchanger is easy frosting, causes its work unstable It is fixed, system performance is influenced, so as to cause the reduction of heat management efficiency.For this purpose, the embodiment of the invention provides a kind of electric car heat Management system and method, the thermal management system of electric automobile not only can realize heat pipe based on the electric car thermal management algorithm Reason, and during heat management, when detect need to heat vehicle external heat exchanger when, control triple valve can also be passed through And/or electric heater heats the vehicle external heat exchanger, to defrost to the vehicle external heat exchanger, guarantees the stabilization of its work Property.Its specific implementation process refers to following Fig. 3 A, Fig. 4 A, Fig. 5 A, embodiment shown in Fig. 6 A and Fig. 7 A.

Secondly, to the present embodiments relate to implementation environment simply introduced.Wherein, the embodiment of the present invention can be with base In only to battery carry out heat management system, solve the problems, such as to defrost to vehicle external heat exchanger, alternatively, can also be based on it is only right In cabin carry out heat management system, solves the problems, such as to defrost to vehicle external heat exchanger, then alternatively, be also based on in cabin with The system that battery carries out heat management simultaneously, solves the problems, such as to defrost to vehicle external heat exchanger.For this purpose, the embodiment of the present application provides Following several thermal management system of electric automobile:

Figure 1B is please referred to, which is a kind of thermal management system of electric automobile shown according to an exemplary embodiment.It should System shown in Figure 1B can be used for carrying out battery heat management, which includes: compressor 110, reversal valve 120, changes outside vehicle Hot device 130, battery heat exchanger 140, multiple shut-off valves, electric heater 150, heat exchanger 160, multiple expansion valves, dynamical system Liquid cooling loop 170 and triple valve 180, wherein the battery heat exchanger 140 is set in battery, and multiple shut-off valve includes first section Only valve 01 and the second shut-off valve 02.

The first end of the compressor 110 is connect by the reversal valve 120 with the vehicle external heat exchanger 130, and is changed outside with the vehicle The access that hot device 130 connects is equipped with the first shut-off valve 01；The second end of the compressor 110 passes through the reversal valve 120 and the electricity Pond heat exchanger 140 connects, and the connecting path of the second end of the compressor 110 and the battery heat exchanger 140 is equipped with second section Only valve 02.

In addition, the vehicle external heat exchanger 130 is successively connect with the electric heater 150 and the heat exchanger 160；The heat exchanger 160 pass sequentially through the first expansion valve 05 in multiple expansion valve and the second expansion valve 06 is connect with the battery heat exchanger 140, and The heat exchanger 160 is in parallel with the dynamical system liquid cooling loop 170 by the triple valve 180.

It further, include dynamical system 1701, water pump 1702 and radiator in the cold loop 170 of dynamical system heat 1703.Wherein, which can distribute heat into the cold loop 170 of dynamical system heat during the work time, in reality In application scenarios, which includes but is not limited to motor, electric machine controller and power device.

The system is by adjusting the flow direction of refrigerant in the reversal valve 120 and controlling each shut-off valve and each expansion valve Open or close and realize to the heat management of battery, which includes heating and refrigeration management.Wherein, each shut-off valve is to system Cryogen has the function of current limliting, and each expansion valve has the function of throttling to refrigerant.

It should be noted that heat management can be realized using a heat exchange principle, at this point, should in practical application scene It is refrigerant medium in battery heat exchanger 140, it is, of course, also possible to heat management be realized using secondary heat exchange principle, at this point it is possible to logical Refrigerant heat water is crossed, and utilizes water to realize heat management, it is not limited in the embodiment of the present invention.

Also, during heat management, when needing to heat the vehicle external heat exchanger 130 by controlling the triple valve 180 accesses got through between dynamical system liquid cooling loop 170 and heat exchanger 160 heat vehicle external heat exchanger 130, And/or the vehicle external heat exchanger 130 is heated by controlling the electric heater 150.

Further, C, the system further include interior heat exchanger 190 referring to Figure 1, which is set to cabin Interior, which is four-way reversing valve.The second end of the compressor 110 also passes through the four-way reversing valve and the car exchanges heat Device 190 connects, which also passes sequentially through third expansion valve 07 and vehicle in the first expansion valve 05 and multiple expansion valves Interior heat exchanger 190 connects.Further, multiple shut-off valve further includes third shut-off valve 03 and the 4th shut-off valve 04；The compression The first end of machine 110 also passes through the four-way reversing valve 120 and connect with the battery heat exchanger 140, and the first end of the compressor 110 The access connecting with the battery heat exchanger 140 is equipped with third shut-off valve 03, and the second end of the compressor 110 is also changed by four-way It is connect to valve with vehicle external heat exchanger 130, and the connecting path of the second end of compressor 110 and vehicle external heat exchanger 130 is equipped with and is somebody's turn to do 4th shut-off valve 04.At this point, system is by adjusting in the reversal valve 120 flow direction of refrigerant and each shut-off valve of control and each A expansion valve opens or closes, and can also realize to the heat management in cabin.

Fig. 1 D is please referred to, Fig. 1 D is a kind of thermal management system of electric automobile shown according to another exemplary embodiment.It should System shown in Fig. 1 D can be used for carrying out heat management in cabin, which includes: compressor 010, reversal valve 020, changes outside vehicle Hot device 030, the first shut-off valve 01, interior heat exchanger 040, electric heater 050, heat exchanger 060, multiple expansion valves, dynamical system System liquid cooling loop 070 and triple valve 080, wherein the car heat exchanger 040 is set in cabin.

The first end of the compressor 010 is connect by the reversal valve 020 with the vehicle external heat exchanger 030, and is changed outside with the vehicle The access that hot device 030 connects is equipped with first shut-off valve 01；The second end of the compressor 010 is by the reversal valve 020 and is somebody's turn to do Interior heat exchanger 040 connects；The vehicle external heat exchanger 030 is successively connect with the electric heater 050 and the heat exchanger 060；The heat Exchanger 060 passes sequentially through the first expansion valve 02 in multiple expansion valve and the second expansion valve 03 and the car heat exchanger 040 Connection, and the heat exchanger 060 is in parallel with the dynamical system liquid cooling loop 070 by the triple valve 080.

It further, include dynamical system 0701, water pump 0702 and radiator in the cold loop 070 of dynamical system heat 0703.Wherein, which can distribute heat into the cold loop 070 of dynamical system heat during the work time, in reality In application scenarios, which includes but is not limited to motor, electric machine controller and power device.

In addition, the system is by adjusting in the reversal valve 020 flow direction of refrigerant and controlling first shut-off valve and each A expansion valve opens or closes realization to the heat management in the cabin, and during heat management, when needs exchange heat to outside the vehicle When device 030 is heated, got through between dynamical system liquid cooling loop 070 and heat exchanger 060 by controlling the triple valve 080 Access heats vehicle external heat exchanger 030, and/or, vehicle external heat exchanger 030 added by controlling electric heater 050 Heat.

Further, Fig. 1 E is please referred to, which further includes battery heat exchanger 090, the second shut-off valve 04 and third cut-off Valve 05, the battery heat exchanger 090 are set in battery, which is four-way reversing valve.

The first end of the compressor 010 also passes through the four-way reversing valve and connect with the battery heat exchanger 090, and the compressor The connecting path of 010 first end and the battery heat exchanger 090 is equipped with the second shut-off valve 04；The second end of the compressor 010 It is also connect by four-way reversing valve with the battery heat exchanger 090, and the second end of the compressor 010 and the battery heat exchanger 090 Connecting path be equipped with the third shut-off valve 05；The heat exchanger 060 also passes sequentially through first expansion valve 02 and multiple Third expansion valve 06 in expansion valve is connect with the battery heat exchanger 090.

Further, which further includes the 4th shut-off valve 07, and the second end of the compressor 010 also passes through the four-way and commutates Valve is connect with the vehicle external heat exchanger 030, and is set on the second end of the compressor 010 and the connecting path of the vehicle external heat exchanger 030 There is the 4th shut-off valve 07.At this point, system is by adjusting the flow direction of refrigerant and each shut-off valve of control in the reversal valve 020 With opening or closing for each expansion valve, the heat management to battery can also be realized.

Fig. 2 is a kind of structural schematic diagram of computer equipment provided in an embodiment of the present invention.In Figure 1B, 1C, 1D and 1E Thermal management system of electric automobile can be realized by computer equipment shown in Fig. 2.Referring to fig. 2, which includes At least one processor 201, communication bus 202, memory 203 and at least one communication interface 204.

Processor 201 can be a general central processor (Central Processing Unit, CPU), micro process Device, application-specific integrated circuit (application-specific integrated circuit, ASIC) or one or more A integrated circuit executed for controlling application scheme program.

Communication bus 202 may include an access, and information is transmitted between said modules.

Memory 203 can be read-only memory (read-only memory, ROM) or can store static information and instruction Other types of static storage device, random access memory (random access memory, RAM)) or can store The other types of dynamic memory of information and instruction, is also possible to Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, light Dish, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carry or Store have instruction or data structure form desired program code and can by any other medium of computer access, but It is without being limited thereto.Memory 203, which can be, to be individually present, and is connected by communication bus 202 with processor 201.Memory 203 It can be integrated with processor 201.

Communication interface 204, using the device of any transceiver one kind, for other equipment or communication, such as Ethernet, wireless access network (RAN), WLAN (Wireless Local Area Networks, WLAN) etc..

In the concrete realization, as one embodiment, processor 201 may include one or more CPU, such as in Fig. 2 Shown in CPU0 and CPU1.

In the concrete realization, as one embodiment, computer equipment may include multiple processors, such as institute in Fig. 2 The processor 201 and processor 205 shown.Each of these processors can be monokaryon (single-CPU) processing Device is also possible to multicore (multi-CPU) processor.Here processor can refer to one or more equipment, circuit, And/or the processing core for handling data (such as computer program instructions).

In the concrete realization, as one embodiment, computer equipment can also include output equipment 206 and input equipment 207.Output equipment 206 and processor 201 communicate, and can show information in many ways.For example, output equipment 206 can be with It is liquid crystal display (liquid crystal display, LCD), Light-Emitting Diode (light emitting diode, LED) Show equipment, cathode-ray tube (cathode ray tube, CRT) shows equipment or projector (projector) etc..Input Equipment 207 and processor 201 communicate, and can receive the input of user in many ways.For example, input equipment 207 can be mouse Mark, keyboard, touch panel device or sensing equipment etc..

Above-mentioned computer equipment can be a general purpose computing device either dedicated computing machine equipment.Having During body is realized, computer equipment can be desktop computer, portable computer, network server, palm PC (Personal Digital Assistant, PDA), cell phone, tablet computer, wireless terminal device, communication equipment or embedded device. The unlimited type for determining computer equipment of the embodiment of the present invention.

Wherein, memory 203 is used to store the program code for executing application scheme, and is held by processor 201 to control Row.Processor 201 is for executing the program code 208 stored in memory 203.May include in program code 208 one or Multiple software modules.Thermal management system of electric automobile shown in Figure 1B, 1C, 1D and 1E by processor 201 and can be deposited One or more software modules in program code 208 in reservoir 203, to determine the data for development and application.

According to described previously it is found that in practical application scene, it is understood that there may be following several heat management scenes: the first heat Scene is managed, heat management only is carried out to battery；Second of heat management scene, only to carrying out heat management in cabin；The third heat management Scene, to carrying out heat management simultaneously in battery and cabin.Wherein, the third heat management scene includes following several situations again: first Kind situation: in cabin and battery is required to heat；Second situation: needing to heat in cabin, and battery needs to freeze；The third situation, In cabin and battery is required to freeze.Different according to above-mentioned heat management scene, the specific implementation of electric car thermal management algorithm is not yet Together, above-mentioned several heat management scenes next will be directed to, pass through Fig. 3 A, Fig. 4 A, Fig. 5 A, Fig. 6 A and Fig. 7 A illustrated embodiment respectively The specific implementation of electric car thermal management algorithm is described in detail.

Fig. 3 A is please referred to, which is a kind of stream of electric car thermal management algorithm shown according to an exemplary embodiment Cheng Tu is described herein for the first above-mentioned heat management scene, which can be applied to above-mentioned In system shown in Figure 1B, this method includes following several realization steps:

Step 301: obtaining the object detection temperature of object to be managed, which includes battery.

When the object to be managed includes battery, which includes battery detecting temperature.In practical application field Jing Zhong needs the temperature current to battery to detect, obtains battery detecting temperature to determine actual demand of the battery to temperature Degree, further, system can detect the temperature of battery by the device of such as temperature detector etc.In this way, system is Detected battery detecting temperature can be obtained.

Step 302: it is poor based on the object detection temperature, object set temperature and object preset temperature, adjust the compressor Entrance and exit connection type, and control the open and close of each shut-off valve and each expansion valve, which is used for Refrigerant is provided.

At this point, the object set temperature includes battery operating temperature, the battery operating temperature include maximum operating temperature and Minimum operating temperature, the object preset temperature difference include that battery preset temperature is poor.

Wherein, which can be by user's customized setting according to actual needs, can also be by the system Default setting, it is not limited in the embodiment of the present invention.

In addition, the model that the battery operating temperature is potentially based on battery is different and different, it is usually true by the developer of battery It is fixed.

Further, which includes following several situations:

The first situation: when the difference between the minimum operating temperature and the battery detecting temperature is greater than the default temperature of the battery When degree difference, adjusts the reversal valve and the first end of the compressor is made to be entrance, the second end of the compressor is outlet, and opening should First shut-off valve, the second shut-off valve, first expansion valve and second expansion valve.

When the difference between minimum operating temperature and the battery detecting temperature is greater than the battery preset temperature difference, illustrate electricity The current temperature in pond is lower than minimum temperature when normal battery operation, hence, it can be determined that needing to heat battery.

For this purpose, please referring to Fig. 3 B, needs to adjust the four-way reversing valve and the first end of the compressor 110 is made to be entrance, i.e., The one end connecting with vehicle external heat exchanger 130 is entrance, and the second end of the compressor 110 is outlet, i.e., connects with battery heat exchanger 140 The other end connect is outlet.Also, first shut-off valve 01 and second shut-off valve 02 are opened, and opens first expansion valve 05 With the second expansion valve 06.

Second situation: when the difference between the battery detecting temperature and maximum operating temperature is greater than the battery preset temperature When poor, adjust the reversal valve and make the first end of the compressor for outlet, the second end of the compressor is entrance, and open this One shut-off valve, the second shut-off valve, first expansion valve and second expansion valve.

When the difference between the battery detecting temperature and the maximum operating temperature is greater than the battery preset temperature difference, explanation The current temperature of battery is higher than maximum temperature when normal battery operation, hence, it can be determined that needing to freeze to battery.

For this purpose, please referring to Fig. 3 C, needs to adjust the four-way reversing valve and make the first end of the compressor 110 for outlet, i.e., The first end connecting with vehicle external heat exchanger 130 is outlet, and the second end of the compressor 110 is entrance, i.e., with battery heat exchanger 140 The other end of connection is entrance.Also, open first shut-off valve 01, second shut-off valve 02, first expansion valve 05 and Two expansion valves 06.

Step 303: starting the compressor, flowed out with utilization from the outlet of the compressor and finally flow back to entering for the compressor The refrigerant of mouth carries out heat management to the object to be managed.

According to the principle that the demand of battery is different, realize that heat management is also different after starting the compressor, next for upper Two kinds of situations are stated, the principle of realization heat management after starting compressor is introduced respectively.

For the first above-mentioned situation: Fig. 3 B is please referred to, after starting the compressor 110, which starts to do work, And the gaseous refrigerant of high temperature and pressure is extruded from outlet.Based on above-mentioned steps to the control mode of reversal valve, and to each The control mode of the open and close of shut-off valve and each expansion valve, the gaseous refrigerant of the high temperature and pressure extruded from the outlet Into battery heat exchanger 140, which absorbs heat, at this point, the battery heat exchanger 140 is equivalent to condenser.It Afterwards, the refrigerant of liquid is flowed out from battery heat exchanger 140, it is swollen that the refrigerant of the liquid passes through the second expansion valve 06, first respectively Swollen valve 05 throttles, and is returning to compressor 110 through over-heat-exchanger 160, electric heater 150 and vehicle external heat exchanger 130.In this way, i.e. It realizes and battery is heated.

For above-mentioned second situation: Fig. 3 C is please referred to, after starting the compressor 110, which starts to do work, And the gaseous refrigerant of high temperature and pressure is extruded from outlet.Based on above-mentioned steps to the control mode of reversal valve, and to each The control mode of the open and close of shut-off valve and each expansion valve, the gaseous refrigerant of the high temperature and pressure extruded from the outlet Successively pass through vehicle external heat exchanger 130, electric heater 150 and heat exchanger 160, later, refrigerant passes through 05 He of the first expansion valve The throttling of second expansion valve 06, becomes the refrigerant of low-temp low-pressure, and the refrigerant of the low-temp low-pressure enters battery heat exchanger 140, inhales Compressor 110 is returned to after receiving the heat of the battery heat exchanger 140.Freeze in this way, realizing to battery.

Step 304: during heat management, detecting whether to need to heat the vehicle external heat exchanger.

In practical application scene, for above-mentioned second situation, due to being from by the refrigerant of vehicle external heat exchanger 130 Therefore the refrigerant of the high temperature and pressure extruded from compressor in the case of this kind, is not usually required to add vehicle external heat exchanger Heat.So being illustrated herein for the first above-mentioned situation.

In order to determine the need for defrosting to vehicle external heat exchanger 130, it is necessary first to detect whether to need outside to the vehicle Heat exchanger 130 is heated.In the concrete realization, detect whether that needing to carry out vehicle external heat exchanger 130 heating may include: inspection The inlet pressure PL of the compressor 110 is surveyed, if the inlet pressure PL of the compressor 110 is less than minimum operating pressures that, it is determined that need The vehicle external heat exchanger 130 is heated, which refers to the minimum entrance pressure that the compressor 110 works normally Power.

It that is to say, in embodiments of the present invention, system is according to the inlet pressure PL of compressor 110 to determine whether needs pair The vehicle external heat exchanger 130 is heated.If the inlet pressure PL of the compressor 110 is less than minimum operating pressures that, due to the vehicle Therefore the entrance that the outlet of external heat exchanger 130 connects the compressor 110 illustrates 130 job insecurity of vehicle external heat exchanger, causes System performance has dropped, and then can determine and need to heat vehicle external heat exchanger 130.Certainly, if the compressor 110 Inlet pressure PL is greater than or equal to the minimum operating pressures that, illustrates that stable system performance, i.e. the vehicle external heat exchanger 130 work surely It is fixed, at this point it is possible to which determination does not need to heat vehicle external heat exchanger 130.

Step 305: when needing to heat the vehicle external heat exchanger, controlling the triple valve and get through the dynamical system liquid cooling Access between loop and the heat exchanger heats the vehicle external heat exchanger, and/or, the electric heater is controlled to the vehicle External heat exchanger is heated.

It in embodiments of the present invention, can be separately through control when determination needs to heat vehicle external heat exchanger 130 The triple valve 180 is come with the access got through between dynamical system liquid cooling loop 170 and heat exchanger 160 to vehicle external heat exchanger 130 It is heated, alternatively, can also be heated separately through the electric heater 150 is controlled, then alternatively, can also be somebody's turn to do by control Triple valve 180 and electric heater 150 are heated.In the concrete realization, can compare outside dynamical system liquid cooling loop 170 and vehicle The temperature of heat exchanger 130 between the two, and determined according to comparison result specifically using above-mentioned any control mode come to vehicle External heat exchanger 130 is heated.

Specifically, it obtains the first temperature and second temperature, first temperature refers to the inlet temperature of the triple valve, this second Temperature refers to the temperature between the heat exchanger and first expansion valve.

It that is to say, it, can be in order to compare the temperature of dynamical system liquid cooling loop 170 and vehicle external heat exchanger 130 between the two The temperature between the inlet temperature (the first temperature) and the heat exchanger 160 and first expansion valve 05 of triple valve 180 is obtained respectively It spends (second temperature), to be determined outside dynamical system liquid cooling loop 170 and vehicle by comparing first temperature and the second temperature The temperature difference of heat exchanger 130 between the two.For example, first temperature is the T1 in figure, the second temperature please continue to refer to Fig. 3 B For the T2 in figure.

In practical comparison procedure, it is understood that there may be the following two kinds situation:

The first situation: if the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is greater than this Second temperature then controls access of the triple valve bypass to get through between the dynamical system liquid cooling loop and the heat exchanger, and By the heat exchanger by the waste heat of the cold pipeline of dynamical system heat pass to the vehicle outer heat-exchanger come to the vehicle external switch into Row heating.

As it was noted above, illustrating to need to change vehicle outside when the inlet pressure of the compressor is less than the minimum operating pressures that Hot device 130 is heated.If the first temperature is greater than the second temperature, illustrate that the temperature in dynamical system liquid cooling loop 170 is high In the temperature of vehicle external heat exchanger 130, in that case, for the waste heat for making full use of dynamical system to distribute, this can control Triple valve 180 bypasses, at this point, the liquid cooling medium in dynamical system liquid cooling loop 170 enters heat exchanger by triple valve 180 160, it returns in dynamical system liquid cooling loop 170, flows to radiator 1703, in this way, the heat exchanger 160 can be by dynamical system Waste heat in system liquid cooling loop 170 passes to vehicle external heat exchanger 130, is heated with realizing to the vehicle external heat exchanger 130.

Further, after controlling the triple valve 180 bypass, if the inlet pressure of the compressor 110 is most continuously less than this Small operating pressure and duration reach preset duration, then start the electric heater 150, to pass through the electric heater 150 to this Vehicle external heat exchanger 130 carries out auxiliary heating.

Wherein, which can also be set by user's customized setting according to actual needs by the system default It sets, it is not limited in the embodiment of the present invention.

If the inlet pressure of the compressor 110 continuously less than the minimum operating pressures that and is held after controlling the bypass of triple valve 180 Continuous duration reaches preset duration, illustrates that vehicle external heat exchanger 130 does not restore to work normally yet, further relates to dynamical system liquid cooling loop Waste heat deficiency in 170 is for heating vehicle external heat exchanger 130.In that case, system can star the electric heating Device 150, further to be heated by the electric heater 150 to the vehicle external heat exchanger 130.Further, start the electricity to add After hot device 150, system can also adjust the operating power of the electric heater 150, sufficiently add to the vehicle external heat exchanger 130 Heat.

Second situation: if the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is less than this Second temperature then starts the electric heater, to be heated by the electric heater to the vehicle external heat exchanger.

As it was noted above, illustrating to need to change vehicle outside when the inlet pressure of the compressor is less than the minimum operating pressures that Hot device 130 is heated.If the first temperature is less than the second temperature, illustrate that the temperature in dynamical system liquid cooling loop 170 is low It, in that case, can not be using the waste heat that dynamical system distributes to vehicle external heat exchanger 130 in the temperature of vehicle external heat exchanger 130 It is heated.At this point, system can star the electric heater 150, to pass through the electric heater 150 to the vehicle external heat exchanger 130 It is heated.Further, after starting the electric heater 150, system can also adjust the operating power of the electric heater 150, Sufficiently to be heated to the vehicle external heat exchanger 130.

It should be noted that system controls the triple valve 180 and leads directly to when first temperature is less than the second temperature, this When, the triple valve 180, the radiator 1703, the dynamical system 1701 and the water pump 1702 are connected into a liquid cooling loop, i.e., dynamic Liquid cooling medium in Force system liquid cooling loop 170 is without over-heat-exchanger 160.

The embodiment of the invention provides a kind of thermal management system of electric automobile, which passes through refrigerant in adjustable change valve Flow direction and control opening or closing for each shut-off valve and each expansion valve, may be implemented to carry out heat management to battery.Also, During heat management, when detect need to heat vehicle external heat exchanger when, can by control triple valve get through power Access between system liquid cooling loop and heat exchanger, by the waste heat in dynamical system liquid cooling loop pass to vehicle external heat exchanger with The vehicle external heat exchanger is heated, and/or, the vehicle external heat exchanger is heated by controlling electric heater, to reach The effect of defrosting, the work for enabling the vehicle external heat exchanger stable, to guarantee stable system performance, in this way, improving electronic The heat management efficiency of automobile.

Fig. 4 A is please referred to, which is a kind of stream of electric car thermal management algorithm shown according to an exemplary embodiment Cheng Tu is described herein for above-mentioned second of heat management scene, which can be applied to above-mentioned In system shown in Fig. 1 D, this method includes following several realization steps:

Step 401: obtaining the object detection temperature of object to be managed, which includes in cabin.

When the object to be managed includes in cabin, which includes detection temperature in cabin.In practical application field Jing Zhong needs to detect temperature current in cabin to determine the actual demand in cabin to temperature, obtains detecting temperature in cabin Degree, further, system can detect the temperature in cabin by the device of such as temperature detector etc.In this way, system is It can obtain and detect temperature in detected cabin.

Step 402: it is poor based on the object detection temperature, object set temperature and object preset temperature, adjust the compressor Entrance and exit connection type, and control the open and close of each shut-off valve and each expansion valve, which is used for Refrigerant is provided.

At this point, the object set temperature includes set temperature in cabin, set temperature can be by user according to reality in the cabin Demand setting.The object preset temperature difference include in cabin preset temperature it is poor, in the cabin preset temperature difference can also by user according to The customized setting of actual demand, alternatively, can also be arranged by the system default, it is not limited in the embodiment of the present invention.

Further, which includes following several situations:

The first situation: it is greater than default temperature in the cabin when detecting the difference between temperature in set temperature in the cabin and the cabin When degree difference, adjust the reversal valve and the first end of the compressor made to be entrance, the second end of the compressor is outlet, open this One shut-off valve, first expansion valve and second expansion valve.

When detecting the difference between temperature in setting in cabin and the cabin greater than preset temperature difference in the cabin, illustrate to work as in cabin Preceding temperature is lower than temperature set by user, hence, it can be determined that needing to heat in cabin.

For this purpose, please referring to Fig. 4 B, needs to adjust the four-way reversing valve and the first end of the compressor 010 is made to be entrance, i.e., The one end connecting with vehicle external heat exchanger 030 is entrance, and the second end of the compressor 010 is outlet, i.e., connects with interior heat exchanger 040 The other end connect is outlet.Also, open first shut-off valve 01, first expansion valve 02 and the second expansion valve 03.

Second situation: it is greater than preset temperature in the cabin when detecting the difference in temperature and cabin between set temperature in the cabin When poor, adjust the reversal valve and make the first end of the compressor for outlet, the second end of the compressor is entrance, and open this One shut-off valve, first expansion valve and second expansion valve.

When detecting the difference in temperature and the cabin between set temperature in the cabin greater than preset temperature difference in the cabin, explanation Current temperature is higher than temperature set by user in cabin, hence, it can be determined that needing to freeze in cabin.

For this purpose, please referring to Fig. 4 C, needs to adjust the four-way reversing valve and make the first end of the compressor 010 for outlet, i.e., The one end connecting with vehicle external heat exchanger 030 is outlet, and the second end of the compressor 010 is entrance, i.e., connects with interior heat exchanger 040 The other end connect is entrance.Also, open first shut-off valve 01, first expansion valve 02 and the second expansion valve 03.

Step 403: starting the compressor, flowed out with utilization from the outlet of the compressor and finally flow back to entering for the compressor The refrigerant of mouth carries out heat management to the object to be managed.

According to the principle that the demand in cabin is different, realize that heat management is also different after starting the compressor, next for upper Two kinds of situations are stated, the principle of realization heat management after starting compressor is introduced respectively.

For the first above-mentioned situation: Fig. 4 B is please referred to, after starting the compressor 010, which starts to do work, And the gaseous refrigerant of high temperature and pressure is extruded from outlet.Based on above-mentioned steps to the control mode of reversal valve, and to each The control mode of the open and close of shut-off valve and each expansion valve, the gaseous refrigerant of the high temperature and pressure extruded from the outlet Heat exchanger 040 into the car, to heat to interior heat exchanger 040, which absorbs heat, at this point, the vehicle Interior heat exchanger 040 is equivalent to condenser.Later, from the refrigerant of interior heat exchanger 040 outflow liquid, the refrigerant point of the liquid Not Jing Guo the second expansion valve 03, the first expansion valve 02 throttling, through over-heat-exchanger 060, electric heater 050 and vehicle external heat exchanger 030 returns to compressor 010.It is heated in this way, realizing in cabin.

For above-mentioned second situation: Fig. 4 C is please referred to, after starting the compressor 010, which starts to do work, And the gaseous refrigerant of high temperature and pressure is extruded from outlet.Based on above-mentioned steps to the control mode of reversal valve, and to each The control mode of the open and close of shut-off valve and each expansion valve, the gaseous refrigerant of the high temperature and pressure extruded from the outlet Successively pass through vehicle external heat exchanger 030, electric heater 050 and heat exchanger 060, later, refrigerant passes through 02 He of the first expansion valve The throttling of second expansion valve 03, becomes the refrigerant of low-temp low-pressure, and the refrigerant of low-temp low-pressure heat exchanger 040 into the car is inhaled Compressor 010 is returned to after receiving the heat of the car heat exchanger 040.Freeze in this way, realizing in cabin.

Step 404: during heat management, detecting whether to need to heat the vehicle external heat exchanger.

In practical application scene, for above-mentioned second situation, due to being from by the refrigerant of vehicle external heat exchanger 030 Therefore the refrigerant of the high temperature and pressure extruded from compressor in the case of this kind, is not usually required to add vehicle external heat exchanger Heat.So being illustrated herein for the first above-mentioned situation.

In order to determine the need for defrosting to vehicle external heat exchanger 030, it is necessary first to detect whether to need outside to the vehicle Heat exchanger 030 is heated.In the concrete realization, detect whether that needing to carry out vehicle external heat exchanger 030 heating may include: inspection The inlet pressure PL of the compressor 010 is surveyed, if the inlet pressure PL of the compressor 010 is less than minimum operating pressures that, it is determined that need The vehicle external heat exchanger 030 is heated, which refers to the minimum entrance pressure that the compressor 010 works normally Power.

Fig. 4 B is please referred to, in embodiments of the present invention, system is according to the inlet pressure PL of compressor 010 to determine whether need The vehicle external heat exchanger 030 is heated.If the inlet pressure PL of the compressor 010 is less than minimum operating pressures that, due to Therefore the entrance that the outlet of the vehicle external heat exchanger 030 connects the compressor 010 illustrates 030 job insecurity of vehicle external heat exchanger, Cause system performance to have dropped, and then can determine and need to heat vehicle external heat exchanger 030.Certainly, if the compressor 010 inlet pressure PL is greater than or equal to the minimum operating pressures that, illustrates stable system performance, i.e. 030 work of vehicle external heat exchanger Work is stablized, at this point it is possible to which determination does not need to heat vehicle external heat exchanger 030.

Step 405: when needing to heat the vehicle external heat exchanger, controlling the triple valve and get through the dynamical system liquid cooling Access between loop and the heat exchanger heats the vehicle external heat exchanger, and/or, the electric heater is controlled to the vehicle External heat exchanger is heated.

It in embodiments of the present invention, can be separately through control when determination needs to heat vehicle external heat exchanger 030 The triple valve 080 is come with the access got through between dynamical system liquid cooling loop 070 and heat exchanger 060 to vehicle external heat exchanger 030 It is heated, alternatively, can also be heated separately through the electric heater 050 is controlled, then alternatively, can also be somebody's turn to do by control Triple valve 080 and electric heater 050 are heated.In the concrete realization, can compare outside dynamical system liquid cooling loop 070 and vehicle The temperature of heat exchanger 030 between the two, and determined according to comparison result specifically using above-mentioned any control mode come to vehicle External heat exchanger 030 is heated.

It that is to say, it, can be in order to compare the temperature of dynamical system liquid cooling loop 070 and vehicle external heat exchanger 030 between the two The temperature between the inlet temperature (the first temperature) and the heat exchanger 060 and first expansion valve 02 of triple valve 080 is obtained respectively It spends (second temperature), to be determined outside dynamical system liquid cooling loop 070 and vehicle by comparing first temperature and the second temperature The temperature difference of heat exchanger 030 between the two.For example, first temperature is the T1 in figure, the second temperature please continue to refer to Fig. 4 B For the T2 in figure.

As it was noted above, illustrating to need to change vehicle outside when the inlet pressure of the compressor is less than the minimum operating pressures that Hot device 030 is heated.If the first temperature is greater than the second temperature, illustrate that the temperature in dynamical system liquid cooling loop 070 is high In the temperature of vehicle external heat exchanger 030, in that case, for the waste heat for making full use of dynamical system to distribute, this can control Triple valve 080 bypasses, at this point, the liquid cooling medium in dynamical system liquid cooling loop 070 enters heat exchanger by triple valve 080 060, it returns in dynamical system liquid cooling loop 070, flows to radiator 0703, in this way, the heat exchanger 060 can be by dynamical system Waste heat in system liquid cooling loop 070 passes to vehicle external heat exchanger 030, is heated with realizing to the vehicle external heat exchanger 030.

Further, after controlling the triple valve 080 bypass, if the inlet pressure of the compressor 010 is most continuously less than this Small operating pressure and duration reach preset duration, then start the electric heater 050, to pass through the electric heater 050 to this Vehicle external heat exchanger 030 carries out auxiliary heating.

If the inlet pressure of the compressor 010 continuously less than the minimum operating pressures that and is held after controlling the bypass of triple valve 080 Continuous duration reaches preset duration, illustrates that vehicle external heat exchanger 030 does not restore to work normally yet, further relates to dynamical system liquid cooling loop Waste heat deficiency in 070 is for heating vehicle external heat exchanger 030.In that case, system can star the electric heating Device 050, further to be heated by the electric heater 050 to the vehicle external heat exchanger 030.Further, start the electricity to add After hot device 050, system can also adjust the operating power of the electric heater 050, sufficiently add to the vehicle external heat exchanger 030 Heat.

As it was noted above, illustrating to need to change vehicle outside when the inlet pressure of the compressor is less than the minimum operating pressures that Hot device 030 is heated.If the first temperature is less than the second temperature, illustrate that the temperature in dynamical system liquid cooling loop 070 is low It, in that case, can not be using the waste heat that dynamical system distributes to vehicle external heat exchanger 030 in the temperature of vehicle external heat exchanger 030 It is heated.At this point, system can star the electric heater 050, to pass through the electric heater 050 to the vehicle external heat exchanger 030 It is heated.Further, after starting the electric heater 050, system can also adjust the operating power of the electric heater 050, Sufficiently to be heated to the vehicle external heat exchanger 030.

It should be noted that system controls the triple valve 080 and leads directly to when first temperature is less than the second temperature, this When, the triple valve 080, the radiator 0703, the dynamical system 0701 and the water pump 0702 are connected into a liquid cooling loop, i.e., dynamic Liquid cooling medium in Force system liquid cooling loop 070 is without over-heat-exchanger 060.

The embodiment of the invention provides a kind of thermal management system of electric automobile, which passes through refrigerant in adjustable change valve Flow direction and control opening or closing for each shut-off valve and each expansion valve, may be implemented to carrying out heat management in cabin.Also, During heat management, when detect need to heat vehicle external heat exchanger when, can by control triple valve get through power Access between system liquid cooling loop and heat exchanger, by the waste heat in dynamical system liquid cooling loop pass to vehicle external heat exchanger with The vehicle external heat exchanger is heated, and/or, the vehicle external heat exchanger is heated by controlling electric heater, to reach The effect of defrosting, the work for enabling the vehicle external heat exchanger stable, to guarantee stable system performance, in this way, improving electronic The heat management efficiency of automobile.

Fig. 5 A is please referred to, which is a kind of stream of electric car thermal management algorithm shown according to an exemplary embodiment Cheng Tu is described herein for the first situation in the third above-mentioned heat management scene, that is to say, is both needed in cabin with battery The scene to be heated.The electric car thermal management algorithm can be applied in system shown in above-mentioned Fig. 1 C or Fig. 1 E, here with For the electric car thermal management algorithm is applied in system shown in above-mentioned Fig. 1 C, this method includes following several realization steps It is rapid:

Step 501: obtaining and detect temperature and battery detecting temperature in cabin.

In practical application scene, in order to determine in cabin and actual demand of the battery to temperature, need in cabin and battery Current temperature is detected, and obtains detecting temperature and battery detecting temperature in cabin, and further, system can be by such as warm The device of degree detector etc come detect in the cabin in the temperature of battery.It is detected in this way, system can obtain in detected cabin Temperature and battery detecting temperature.

Step 502: based on preset temperature in set temperature in detection temperature in the cabin, the battery detecting temperature, cabin, cabin Difference, battery operating temperature and battery preset temperature are poor, adjust the connection type of the entrance and exit of the compressor, and control each The open and close of shut-off valve and each expansion valve, the battery operating temperature include maximum operating temperature and minimum operating temperature.

Wherein, set temperature can be by user's customized setting according to actual needs in the cabin.For example, in winter, user Set temperature in the cabin would generally be arranged somewhat higher.

Wherein, preset temperature difference and battery preset temperature difference also can be customized according to actual needs by user in the cabin Setting, can also be arranged, it is not limited in the embodiment of the present invention by the system default.

Wherein, the battery operating temperature be potentially based on battery model it is different and different, it is usually true by the developer of battery It is fixed.

In the concrete realization, the step 502 may include: when in set temperature in the cabin and the cabin detect temperature between It is poor that difference is greater than preset temperature in the cabin, and the difference between the minimum operating temperature and the battery detecting temperature is greater than the battery When preset temperature difference, adjusts the four-way reversing valve and the first end of compressor is made to be entrance, second end is outlet；Close the third Shut-off valve and the 4th shut-off valve, and open first shut-off valve and second shut-off valve, and open first expansion valve, this Two expansion valves and the third expansion valve.

When detecting the difference between temperature in set temperature in the cabin and the cabin greater than preset temperature difference in the cabin, explanation Current temperature is lower than set temperature in the cabin of user setting in cabin, hence, it can be determined that needing to heat in cabin.When most When difference between low operating temperature and the battery detecting temperature is greater than the battery preset temperature difference, illustrate the current temperature of battery Minimum temperature when lower than normal battery operation, hence, it can be determined that needing also to heat battery.

For this purpose, please referring to Fig. 5 B, needs to adjust the four-way reversing valve 120 and the first end of compressor 110 is made to be entrance, i.e., The one end connecting with both vehicle external heat exchanger 130 and battery heat exchanger 140 is entrance, and second end is outlet, i.e., exchanges heat with outside vehicle The other end that device 130, interior heat exchanger 190 are connected with 140 three of battery heat exchanger is outlet.Also, close third cut-off Valve 03 and the 4th shut-off valve 04, and first shut-off valve 01 and second shut-off valve 02 are opened, and open first expansion valve 05, second expansion valve 06 and the third expansion valve 07.

It should be noted that when needing in cabin and when one of battery does not need heating, branch where it can be closed Expansion valve.For example, the second expansion valve 06 can be closed if battery does not need to heat.

Step 503: starting the compressor, to utilize the refrigeration for exporting outflow and finally flow back to the entrance from the compressor Agent in the cabin and the battery carry out heat management.

After starting the compressor 110, which starts to do work, and the gaseous system of high temperature and pressure is extruded from outlet Cryogen.Based on above-mentioned steps to the control mode of four-way reversing valve, and to the unlatching of each shut-off valve and each expansion valve with The gaseous refrigerant of the control mode of closing, the high temperature and pressure extruded from the outlet respectively enters interior heat exchanger 190 and electricity Pond heat exchanger 140, to heat to interior heat exchanger 190 and battery heat exchanger 140, the car heat exchanger 190 and battery are changed Hot device 140 absorbs heat, at this point, the car heat exchanger 190 and battery heat exchanger 140 are equivalent to condenser.Later, it is changed from car Hot device 190 and battery heat exchanger 140 flow out the refrigerant of liquid, and the refrigerant of the liquid passes through third expansion valve 07 and the respectively The throttling of two expansion valves 06 converges successively by the first expansion valve 05, heat exchanger 160, electric heater 150 and vehicle external heat exchanger 130 return to compressor 110.It is heated in cabin with battery in this way, realizing.

It should be noted that after starting the compressor, may be used also in order to guarantee sufficiently to be heated in cabin with battery To detect the entrance of interior heat exchanger 190 and battery heat exchanger 140 respectively, and exchanged heat according to the car heat exchanger 190 and battery The inlet temperature of device 140, adjusts the revolving speed of compressor 110, and specific implementation refers to following steps 504 to step 505.

Step 504: third temperature and the 4th temperature are obtained, which refers to that the first end of the compressor is entrance, Second end is the inlet temperature of the car heat exchanger in the state of outlet and second shut-off valve unlatching, and the 4th temperature refers to this The first end of compressor is entrance, and second end is the entrance of the battery heat exchanger in the state of outlet and second shut-off valve unlatching Temperature.

In heat management system, what is mainly controlled is the temperature of condenser inlet refrigerant, be that is to say, interior heat exchanger 190 inlet temperature and the inlet temperature of battery heat exchanger 140.Fig. 5 B is please referred to, when compressor 110, each shut-off valve are in When above-mentioned state, which refers to the Tc2 in figure, and the 4th temperature refers to the Tb2 in figure.In fact, it can be appreciated that should Third temperature is identical as the size of the 4th temperature.

Step 505: if the third temperature and/or the 4th temperature are in preset temperature range, keeping the compressor Revolving speed it is constant；If the third temperature and/or the 4th temperature are lower than the preset temperature range, increase turning for the compressor Speed；If the third temperature and/or the 4th temperature are higher than the preset temperature range, the revolving speed of the compressor is reduced.

Wherein, which can be configured by user based on system performance in advance.If interior heat exchanger 190 inlet temperature Tc2 and/or the inlet temperature Tb2 of battery heat exchanger 140 are in preset temperature range, are illustrated in cabin It is preferable with the effect of battery heating, at this point it is possible to keep the revolving speed of compressor constant.

What needs to be explained here is that if the above-mentioned third temperature and/or the 4th temperature are in preset temperature range, packet It includes: if the third temperature is in preset temperature range；Alternatively, if the 4th temperature is in preset temperature range；Alternatively, if The third temperature and the 4th temperature are in preset temperature range.Also, described below and/or relationship also includes above-mentioned Several situations, are not repeated below and repeat.

If the inlet temperature Tc2 of interior heat exchanger 190 and/or the inlet temperature Tb2 of battery heat exchanger 140 are lower than default In temperature range, illustrate in cabin and the degree of heat of battery is inadequate, for this purpose, the revolving speed of compressor 120 can be increased, so that Compressor 120 extrudes the refrigerant of more high temperature and pressure, to sufficiently be heated in cabin with battery.

In addition, if the car inlet temperature Tc2 of the heat exchanger 190 and/or inlet temperature Tb2 high of battery heat exchanger 140 In in preset temperature range, illustrate in cabin and battery heat degree have been over actual demand, at this point it is possible to reduce pressure The revolving speed of contracting machine 120, to reduce the amount of the refrigerant of the high temperature and pressure of the extrusion of compressor 120, to reduce in cabin and battery Degree of heat, to guarantee in cabin and the degree of heat of battery is moderate.

It is noted that it is above-mentioned in cabin and during battery heats, pass through and adjusts turning for compressor 120 Speed is adjusted in cabin and the degree of heat of battery, improves heat management efficiency.

It should be noted that being needed during above-mentioned heat management due to using vehicle external heat exchanger 130, also, when in cabin When heating, usually may be since ambient temperature is lower, for example, in winter when usually require to heat in cabin, and Under this kind of environment, vehicle external heat exchanger 130 may be easy frosting.Therefore, in order to guarantee vehicle external heat exchanger 130 work stabilization Property, need to consider whether vehicle external heat exchanger 130 needs to defrost, specific implementation refers to following steps 506 and step 507.

Step 506: during heat management, detecting whether to need to heat the vehicle external heat exchanger.

Step 507: when needing to heat the vehicle external heat exchanger, controlling the triple valve and get through dynamical system liquid cooling ring Access between road and heat exchanger heats vehicle external heat exchanger, and/or, control electric heater to vehicle external heat exchanger into Row heating.

It in embodiments of the present invention, can be separately through control when determination needs to heat vehicle external heat exchanger 130 The triple valve 180 gets through the access between the dynamical system cold loop 170 of heat and heat exchanger 160, with to vehicle external heat exchanger 130 into Row heating, alternatively, can also separately through control the electric heater 150 be heated, then alternatively, can also by control this three Port valve 180 and electric heater 150 are heated.In the concrete realization, it can compare and be changed outside dynamical system liquid cooling loop 170 and vehicle The temperature of hot device 130 between the two, and determined according to comparison result specifically using above-mentioned any control mode come outside to vehicle Heat exchanger 130 is heated.

In the concrete realization, system obtains the first temperature and second temperature, first temperature refer to the entrance of the triple valve Temperature, the second temperature refer to the temperature between the heat exchanger and first expansion valve.

It that is to say, it, can be in order to compare the temperature of dynamical system liquid cooling loop 170 and vehicle external heat exchanger 130 between the two The temperature between the inlet temperature (the first temperature) and the heat exchanger 160 and first expansion valve 05 of triple valve 180 is obtained respectively It spends (second temperature), to be determined outside dynamical system liquid cooling loop 170 and vehicle by comparing first temperature and the second temperature The temperature difference of heat exchanger 130 between the two.For example, first temperature is the T1 in figure, the second temperature please continue to refer to Fig. 5 B For the T2 in figure.

The first situation: if the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is greater than this Second temperature then controls the access that triple valve bypass is got through between dynamical system liquid cooling loop and heat exchanger, by being somebody's turn to do The waste heat of the cold pipeline of dynamical system heat is passed to the vehicle outer heat-exchanger to add to the vehicle external switch by heat exchanger Heat.

In embodiments of the present invention, a kind of thermal management system of electric automobile is provided, which passes through in adjustable change valve The flow direction and each shut-off valve of control of refrigerant and opening or closing for each expansion valve, may be implemented to carry out in battery and cabin Heat management.Also, during heat management, when detect need to heat vehicle external heat exchanger when, can pass through control three Port valve gets through the access between dynamical system liquid cooling loop and heat exchanger, and the waste heat in dynamical system liquid cooling loop is passed to Vehicle external heat exchanger to be heated to the vehicle external heat exchanger, and/or, by control electric heater the vehicle external heat exchanger is added Heat, thus have the function that defrosting, the work for enabling the vehicle external heat exchanger stable, to guarantee stable system performance, in this way, Improve the heat management efficiency of electric car.

Next, being described for the second situation in the third above-mentioned heat management scene, it that is to say, needed in cabin The scene that heating, battery need to freeze.Fig. 6 A is please referred to, which is a kind of electronic vapour shown according to an exemplary embodiment The flow chart of vehicle thermal management algorithm, the electric car thermal management algorithm can be applied to system shown in above-mentioned Fig. 1 C or Fig. 1 E In, here by taking the electric car thermal management algorithm is applied in system shown in above-mentioned Fig. 1 C as an example, this method includes following several A realization step:

Step 601: obtaining and detect temperature and battery detecting temperature in cabin.

It implements the step 501 referred in above-mentioned Fig. 5 A embodiment, no longer repeats again here.

Step 602: when the difference detected between temperature in set temperature in the cabin and the cabin is greater than preset temperature in the cabin Difference, and the difference between the battery detecting temperature and the maximum operating temperature be greater than the battery preset temperature difference when, adjust this four Logical reversal valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet.

When detecting the difference between temperature in set temperature in cabin and cabin greater than preset temperature difference in cabin, illustrate to work as in cabin Preceding temperature is lower than set temperature in the cabin of user setting, hence, it can be determined that needing to heat in cabin.Work as battery detecting When difference between temperature and maximum operating temperature is greater than battery preset temperature difference, illustrate that the current temperature of battery is being higher than battery just Often maximum temperature when work, hence, it can be determined that needing to freeze to battery.

For this purpose, please refer to Fig. 6 B, need to adjust four-way reversing valve 120 and the first end of compressor 110 made to be entrance, i.e., with One end of both vehicle external heat exchanger 130 and battery heat exchanger 140 connection is entrance；Second end be outlet, i.e., with vehicle external heat exchanger 130, the other end that interior heat exchanger 190 is connected with 140 three of battery heat exchanger is outlet.

Step 603: closing first shut-off valve, second shut-off valve and the 4th shut-off valve, and open the third and cut Only valve, and first expansion valve is closed, open second expansion valve and the third expansion valve.

Further, other than adjusting four-way reversing valve, it is also necessary to control opening for each shut-off valve and each expansion valve It opens and closes, specifically as described in the step 603.

It should be noted that above-mentioned steps 602 and step 603 are for realizing based on detection temperature, battery inspection in the cabin Set temperature in testing temperature, cabin, preset temperature is poor in cabin, battery operating temperature and battery preset temperature are poor, adjusts the compressor Entrance and exit connection type, and the step of controlling the open and close of each shut-off valve and each expansion valve.

Step 604: starting the compressor, to utilize the refrigeration for exporting outflow and finally flow back to the entrance from the compressor Agent in the cabin and the battery carry out heat management.

After starting compressor is done work, the refrigerant heat exchanger into the car of the high temperature and pressure extruded from compressor 110 190, which absorbs heat, with to heating in cabin.Also, the room temperature flowed out from the car heat exchanger 190 The refrigerant of high pressure successively after third expansion valve 07 and the second expansion valve 06, becomes the refrigerant of low-temp low-pressure, the low temperature The refrigerant of low pressure enters battery heat exchanger 140, to freeze to battery.Further, it is flowed out from the battery heat exchanger 140 Gaseous refrigerant returned in compressor 110 from the entrance of compressor 110.It is heated in this way, realizing in cabin, and Freeze to battery.

In addition, being analyzed from the angle of the conservation of energy, at this point, the conservation of energy meets formula Qc=Qb+P, wherein the Qc generation The systemic heat in table cabin, Qb represent the heat of battery release, which refers to 110 work done of compressor, the i.e. systemic heat in cabin Amount is equal to the sum of heat and the acting of compressor 110 of battery release, and energy conservation relation is as shown in Figure 6 C.

Further, in the concrete realization, after system starting compressor operating, in order to sufficiently being heated in cabin, with And sufficiently freezed to battery, compressor can also be adjusted according to the inlet temperature of battery heat exchanger and interior heat exchanger Revolving speed, and/or the open and close of control each shut-off valve and each expansion valve, specifically refer to following steps 605 and step 606。

Step 605: the 5th temperature and the 6th temperature are obtained, the 5th temperature refers to that the first end of the compressor is entrance, Second end is the inlet temperature of the battery heat exchanger in the state of outlet and second shut-off valve closing, and the 6th temperature refers to this The first end of compressor is entrance, which be that the car heat exchanger enters in the state of outlet and second shut-off valve closing Mouth temperature.

For example, please continue to refer to Fig. 6 B, the first end of compressor 110 is entrance, second end is outlet, and this second section In the state that only valve 02 is closed, the 5th temperature refers to the Tb1 in figure, and the 6th temperature refers to the Tc2 in figure.

Step 606: according to the 5th temperature, the 6th temperature, the first default inlet temperature, the second default inlet temperature and Preset temperature is poor, adjusts the open and close of the revolving speed and/or control each shut-off valve and each expansion valve of the compressor.

Wherein, the first default inlet temperature, the second default inlet temperature and the preset temperature difference can be by users It is configured in advance according to system performance, it is generally the case that the first default inlet temperature and the second default inlet temperature point Not Wei battery heat exchanger 140 and interior heat exchanger 190 actual requirement inlet temperature.

In the concrete realization, when the difference between the 5th temperature and the first default inlet temperature is greater than the preset temperature Difference, and the difference between the second default inlet temperature and the 6th temperature be greater than the preset temperature difference when, increase the compressor Revolving speed, and continue to execute and obtain the 5th temperature and the step of six temperature, until the 5th temperature and the first default entrance It is poor that difference between temperature is less than the preset temperature, and the difference between the second default inlet temperature and the 6th temperature is less than When the preset temperature difference, keep the revolving speed of the compressor constant.

When to be greater than the preset temperature poor for the difference between the 5th temperature and the first default inlet temperature, and this is second pre- If the difference between inlet temperature and the 6th temperature is greater than the preset temperature difference, illustrate the entrance temperature of battery heat exchanger 140 Degree is higher than the inlet temperature of actual requirement, and the inlet temperature of interior heat exchanger 190 is lower than the entrance of actual requirement, i.e. explanation pair The refrigeration degree of battery is inadequate, also inadequate to the degree of heat in cabin.At this point it is possible to increase the revolving speed of the compressor 110, so that Compressor 110 extrudes the refrigerant of more high temperature and pressure, to sufficiently be heated in cabin, and carries out to battery abundant Refrigeration.

When to be less than the preset temperature poor for the difference between the 5th temperature and the first default inlet temperature, and this is second pre- If the difference between inlet temperature and the 6th temperature is less than the preset temperature difference, illustrate battery heat exchanger and interior heat exchanger Inlet temperature close to actual requirement, further relate to reach suitable to the refrigeration degree of battery and to the degree of heat in cabin In, therefore, the revolving speed of the compressor can be kept constant.

Further, when the difference between the 5th temperature and the first default inlet temperature be greater than the preset temperature it is poor, And the 6th absolute value of the difference of temperature and second default inlet temperature when being less than the preset temperature difference, open third cut-off Valve and the 4th shut-off valve, close first shut-off valve and second shut-off valve, and open first expansion valve, second expansion Valve and the third expansion valve.

When the difference between the 5th temperature and the first default inlet temperature be greater than the preset temperature it is poor, and the 6th temperature When degree is less than the preset temperature difference with the absolute value of the difference of the second default inlet temperature, illustrate to the refrigeration intensity of battery not It is enough, but the degree of heat in cabin is had reached moderate.At this point, please referring to Fig. 6 D, third shut-off valve 03 and the 4th can be opened Shut-off valve 04 closes the first shut-off valve 01 and the second shut-off valve 02, and opens the first expansion valve 05, the second expansion valve 06 and third Expansion valve 07.

At this point, the refrigerant of the high temperature and pressure extruded from compressor 110 respectively enters vehicle external heat exchanger 130 and interior heat exchange Device 190, to reinforce the refrigeration degree to battery by 150 place branch of vehicle external heat exchanger, so that the inlet temperature of battery also connects Nearly actual requirement.It that is to say, while not influencing to degree of heat in cabin, the refrigeration degree to battery can be increased, such as This, improves heat management efficiency.

In addition, analyzing from the angle of the conservation of energy, in that case, the conservation of energy meets formula Qa+Qc=Qb+P, Wherein, Qa represents the heat of the absorption of vehicle external heat exchanger 130, which represents the systemic heat in cabin, and Qb represents the heat of battery release Amount, the P refer to 110 work done of compressor, i.e. the sum of the heat with the systemic heat in cabin of the absorption of vehicle external heat exchanger 130 are equal to The sum of the heat of battery release and the acting of compressor 110, energy conservation relation is as illustrated in fig. 6e.

Further, if the difference between the 5th temperature and the first default inlet temperature is persistently greater than the preset temperature Difference, and the absolute value of the difference of the 6th temperature and the second default inlet temperature is poor continuously less than the preset temperature, then increasing should The aperture of first expansion valve.

It that is to say, if the difference between the 5th temperature and the first default inlet temperature is persistently greater than the preset temperature Difference, and the absolute value of the difference of the 6th temperature and the second default inlet temperature is poor continuously less than the preset temperature, illustrate even if It also fails to reinforce the refrigeration degree to battery by 130 place branch of vehicle external heat exchanger, at this point, in order to reinforce flowing to battery heat exchange The amount of device can increase the aperture of first expansion valve, be reinforced with further passing through 130 place branch of vehicle external heat exchanger to battery Refrigeration degree.

Further, when the aperture of first expansion valve is maximum, the 5th temperature and the first default inlet temperature Between difference be still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the second default inlet temperature is still small It is poor in the preset temperature, increase the revolving speed of the compressor.

That is to say, when the aperture of first expansion valve is maximum, the 5th temperature and the first default inlet temperature it Between difference be still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the second default inlet temperature still less than The preset temperature is poor, illustrates to the refrigeration intensity of battery not enough, at this point it is possible to increase the revolving speed of the compressor 110, so that pressure Contracting machine 110 extrudes more refrigerants, and more refrigerants are passed to this by the branch where the vehicle external heat exchanger 130 Battery heat exchanger 140, to reinforce the refrigeration degree to battery.

Further, when the difference between the first default inlet temperature and the 5th temperature be greater than the preset temperature it is poor, And the 6th absolute value of the difference of temperature and second default inlet temperature when being less than the preset temperature difference, reduce first expansion The aperture of valve；Difference when the aperture of first expansion valve is minimum, between the first default inlet temperature and the 5th temperature Value is still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the second default inlet temperature is default still less than this Temperature difference reduces the revolving speed of the compressor.

That is to say, when the difference between the first default inlet temperature and the 5th temperature be greater than the preset temperature it is poor, and When the absolute value of the difference of 6th temperature and the second default inlet temperature is less than the preset temperature difference, illustrate battery heat exchanger 140 inlet temperature is much higher than actual requirement, i.e., too strong to the refrigeration degree of battery, but remains to the degree of heat in cabin It is moderate.At this point it is possible to reduce the aperture of first expansion valve, that is, reduces and changed by 130 place branch of vehicle external heat exchanger for battery The amount for the refrigerant that hot device 140 provides, to reduce the refrigeration degree to battery.Further, opening when first expansion valve When degree is minimum, the inlet temperature of battery is again below actual requirement, but interior 190 inlet temperature of heat exchanger is still close to being actually subjected to It asks, illustrates therefore, the revolving speed of compressor 110 can be reduced, so that compressor 110 is pressed to the refrigeration degree of battery or too strong The amount of refrigerant out reduces, to reduce the refrigeration provided by 130 place branch of vehicle external heat exchanger for battery heat exchanger 140 The amount of agent, and then reduce the refrigeration degree to battery.

Further, when the absolute value of the difference of the 5th temperature and the first default inlet temperature is less than the preset temperature Difference, and the difference between the 6th temperature and the second default inlet temperature be greater than the preset temperature when, increase this first expansion The aperture of valve；When the aperture of first expansion valve is maximum, the difference of the 5th temperature and the first default inlet temperature it is exhausted It is poor still less than the preset temperature to being worth, and the difference between the 6th temperature and the second default inlet temperature is still greater than this and presets Temperature reduces the revolving speed of the compressor.

It that is to say, when to be less than the preset temperature poor for the absolute value of the difference of the 5th temperature and the first default inlet temperature, And the 6th difference between temperature and the second default inlet temperature illustrates the refrigeration journey to battery when being greater than the preset temperature Degree reaches moderate, still, too strong to the degree of heat in cabin, at this point it is possible to increase the aperture of first expansion valve, so that vehicle 130 place branch of external heat exchanger shunts the refrigerant for the high temperature and pressure that compressor 110 extrudes, i.e. reduction flows through car and changes The amount of the refrigerant of hot device 190, to reduce to the degree of heat in cabin.Further, when the aperture of first expansion valve is When maximum, the refrigeration degree of the battery still keeps moderate, and when the temperature in the cabin is still higher, can reduce the compressor 110 Revolving speed so that the amount for the refrigerant that compressor 110 extrudes reduces, to provide less refrigerant for interior heat exchanger 190, And then it reduces to the degree of heat in cabin.

Further, when the absolute value of the difference of the 5th temperature and the first default inlet temperature is less than the preset temperature Difference when the difference between the second default inlet temperature and the 6th temperature is greater than the preset temperature difference, reduces first expansion The aperture of valve.

It that is to say, when to be less than the preset temperature poor for the absolute value of the difference of the 5th temperature and the first default inlet temperature, When difference between the second default inlet temperature and the 6th temperature is greater than the preset temperature difference, illustrate the refrigeration journey to battery Degree is more moderate, but insufficient to the degree of heat in cabin, at this point it is possible to reduce the aperture of the first expansion valve, is changed outside vehicle with reducing The shunting of hot 130 place branch of device to increase the amount for flowing through the refrigerant of interior heat exchanger 190, and then enhances in cabin Degree of heat.

Further, after the aperture for reducing first expansion valve, when the 5th temperature and the first default inlet temperature Absolute value of the difference it is poor still less than the preset temperature, and the difference between the second default inlet temperature and the 6th temperature is still big When the preset temperature difference, first shut-off valve and the third shut-off valve are opened, closes second shut-off valve and the 4th cut-off Valve.

That is to say, after the aperture for reducing first expansion valve, when the 5th temperature and the first default inlet temperature it Absolute value of the difference is poor still less than the preset temperature, and the difference between the second default inlet temperature and the 6th temperature is still greater than When the preset temperature difference, illustrate to reach moderate to the refrigeration degree of battery, but still insufficient to the degree of heat in cabin, at this point, can To open first shut-off valve and the third shut-off valve, second shut-off valve and the 4th shut-off valve are closed.Fig. 6 F is referred to, In the case of this kind, the refrigerant of the high temperature and pressure extruded from compressor 110 only flow to car heat exchanger 190, to enhance pair Degree of heat in cabin.Also, the refrigerant of the normal temperature high voltage flowed out from interior heat exchanger 190 shunts, and flows separately through and changes outside vehicle Hot device 130 and battery heat exchanger 140 converge and return in compressor 110 later.

In addition, analyzing from the angle of the conservation of energy, in that case, the conservation of energy meets formula Qc=Qa+Qb+P, Wherein, Qa represents the heat of the absorption of vehicle external heat exchanger 130, which represents the systemic heat in cabin, and Qb represents the heat of battery release Amount, the P refer to 110 work done of compressor, i.e. the systemic heat in cabin is equal to heat, the battery that vehicle external heat exchanger 130 discharges The sum of heat and compressor 110 acting of release, energy conservation relation is as shown in Figure 6 G.

Above-mentioned difference relationship and the second default inlet temperature according between the 5th temperature and the first default inlet temperature With the difference relationship between the 6th temperature, adjust the aperture of the first expansion valve and/or adjust the revolving speed of compressor so that this Five temperature are close to the first default inlet temperature, and the 6th temperature is close to the second default inlet temperature, i.e., guarantee battery heat exchanger and The inlet temperature of interior heat exchanger improves heat management efficiency close to actual requirement.

During above-mentioned heat management, due to using vehicle external heat exchanger 130, also, when needing to heat in cabin, usually may be used Can be since ambient temperature is lower, for example, in winter when usually require to heat in cabin, and under this kind of environment, Vehicle external heat exchanger 130 may be easy frosting, for example, for scene described in above-mentioned Fig. 6 B and Fig. 6 F.Therefore, in order to guarantee outside vehicle The stability that heat exchanger 130 works, needs to consider whether vehicle external heat exchanger 130 needs to defrost, and specific implementation refers to as follows Step 607 is to step 608.

Step 607: during heat management, detecting whether to need to heat the vehicle external heat exchanger.

In order to determine the need for defrosting to vehicle external heat exchanger 130, it is necessary first to detect whether to need outside to the vehicle Heat exchanger 130 is heated.In the concrete realization, detect whether that needing to carry out vehicle external heat exchanger 130 heating may include: inspection The inlet pressure PL of the compressor is surveyed, if the inlet pressure PL of the compressor is less than minimum operating pressures that, it is determined that need to this Vehicle external heat exchanger is heated, which refers to the minimum inlet pressure that the compressor works normally.

It implements principle and refers to described in the step 506 in above-mentioned Fig. 5 A illustrated embodiment, is not repeated herein superfluous It states.

Step 608: when needing to heat the vehicle external heat exchanger, controlling the triple valve and get through dynamical system liquid cooling ring Access between road and heat exchanger heats vehicle external heat exchanger, and/or, control electric heater to vehicle external heat exchanger into Row heating.

It in embodiments of the present invention, can be separately through control when determination needs to heat vehicle external heat exchanger 130 The triple valve 180 get through the access between dynamical system liquid cooling loop 170 and heat exchanger 160 with to vehicle external heat exchanger 130 into Row heating, alternatively, can also separately through control the electric heater 150 be heated, then alternatively, can also by control this three Port valve 180 and electric heater 150 are heated.In the concrete realization, it can compare and be changed outside dynamical system liquid cooling loop 170 and vehicle The temperature of hot device 130 between the two, and determined according to comparison result specifically using above-mentioned any control mode come outside to vehicle Heat exchanger 130 is heated.

In the concrete realization, it obtains the first temperature and second temperature, first temperature refers to the inlet temperature of the triple valve, The second temperature refers to the temperature between the heat exchanger and first expansion valve.

It that is to say, it, can be in order to compare the temperature of dynamical system liquid cooling loop 170 and vehicle external heat exchanger 130 between the two The temperature between the inlet temperature (the first temperature) and the heat exchanger 160 and first expansion valve 05 of triple valve 180 is obtained respectively It spends (second temperature), to be determined outside dynamical system liquid cooling loop 170 and vehicle by comparing first temperature and the second temperature The temperature difference of heat exchanger 130 between the two.For example, please continue to refer to Fig. 6 B or Fig. 6 F, which is the T1 in figure, this Two temperature are the T2 in figure.

The first situation: if the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is greater than this First temperature then controls triple valve bypass, to be passed to the waste heat of the cold pipeline of dynamical system heat by the heat exchanger The vehicle outer heat-exchanger heats the vehicle external switch.

It implements principle and refers in the step 507 of above-mentioned Fig. 5 A illustrated embodiment described in the first situation, here It is no longer repeated.

Further, if the inlet pressure of the compressor is continuously less than the minimum operating pressures that and duration reaches default Duration then starts the electric heater, to carry out auxiliary heating to the vehicle external heat exchanger by the electric heater.

It implements principle and refers in the step 507 of above-mentioned Fig. 5 A illustrated embodiment described in the first situation, here Also it is no longer repeated.

It implements principle and refers in the step 507 of above-mentioned Fig. 5 A illustrated embodiment described in second situation, here Also it is no longer repeated.

Next, being described for the third situation in the third above-mentioned heat management scene, that is to say, it is in cabin and electric Pond is required to the scene of refrigeration.Fig. 7 A is please referred to, which is a kind of electric car heat shown according to an exemplary embodiment The flow chart of management method, the electric car thermal management algorithm can be applied in system shown in above-mentioned Fig. 1 C or Fig. 1 E, this In by shown in the electric car thermal management algorithm is applied to above-mentioned Fig. 1 C in system for, this method may include following several Realize step:

Step 701: obtaining and detect temperature and battery detecting temperature in cabin.

Step 702: being greater than preset temperature in the cabin when detecting the difference in temperature and the cabin between set temperature in the cabin Difference, and the difference between the battery detecting temperature and the maximum operating temperature be greater than the battery preset temperature difference when, adjust this four Logical reversal valve makes the second end of compressor be entrance, and first end is outlet.

When detecting the difference in temperature and the cabin between set temperature in the cabin greater than preset temperature difference in the cabin, explanation Current temperature is higher than set temperature in the cabin of user setting in cabin, hence, it can be determined that needing to freeze in cabin.When this When difference between battery detecting temperature and the maximum operating temperature is greater than the battery preset temperature difference, illustrate the current temperature of battery Degree is higher than maximum temperature when normal battery operation, hence, it can be determined that needing also to freeze to battery.

For this purpose, please referring to Fig. 7 B, needs to adjust the four-way reversing valve 120 and the second end of compressor 110 is made to be entrance, i.e., The one end connecting with vehicle external heat exchanger 130, interior heat exchanger 190 and 140 three of battery heat exchanger is entrance, the compressor 110 Second end be outlet, i.e., one end connect with both vehicle external heat exchanger 130 and battery heat exchanger 140 is to export.

Step 703: opening first shut-off valve and the second shut-off valve, and close the third shut-off valve and the 4th cut-off Valve, and open first expansion valve, second expansion valve and the third expansion valve.

Further, other than adjusting four-way reversing valve, it is also necessary to control opening for each shut-off valve and each expansion valve It opens and closes, specifically as described in step 703.

It should be noted that above-mentioned steps 702 and step 703 are for realizing based on detection temperature, battery inspection in the cabin Set temperature in testing temperature, cabin, preset temperature is poor in cabin, battery operating temperature and battery preset temperature are poor, adjusts the compressor Entrance and exit connection type, and the step of controlling the open and close of each shut-off valve and each expansion valve.

In practical implementations, in cabin and when one of battery does not need refrigeration, the expansion valve of branch road where closing it is i.e. It can.For example, third expansion valve 07 can be closed when not needing refrigeration in cabin.

Step 704: starting the compressor, to utilize the refrigeration for exporting outflow and finally flow back to the entrance from the compressor Agent and during heat management, detects whether to need to carry out the vehicle external heat exchanger in the cabin and the battery carries out heat management Heating.

Fig. 7 B is please referred to, after starting the compressor 110, which starts to do work, and extrudes high temperature and pressure from outlet Gaseous refrigerant.Based on above-mentioned steps to the control mode of four-way reversing valve, and to each shut-off valve and each expansion The gaseous refrigerant of the control mode of the open and close of valve, the high temperature and pressure extruded from the outlet flows through vehicle external heat exchanger 130, become the refrigerant of the liquid of normal temperature high voltage.The refrigerant of the liquid of the normal temperature high voltage is divided into two-way: successively passing through all the way After first expansion valve 05 and third expansion valve 07, become the refrigerant of the liquid of low-temp low-pressure, the system of the liquid of the low-temp low-pressure Cryogen flows through interior heat exchanger 190, with to freezing in cabin, later, from the gaseous refrigerant that vehicle external heat exchanger 150 comes out from The entrance of compressor 110 returns in the compressor 110；Another way successively after the first expansion valve 05 and the second expansion valve 06, The refrigerant of liquid as low-temp low-pressure, the refrigerant of the liquid of the low-temp low-pressure flows through battery heat exchanger 140, to battery Freeze, later, the gaseous refrigerant come out from battery heat exchanger 140 returns to the compressor 110 from the entrance of compressor 110 In.Freeze in cabin with battery in this way, realizing.

It should be noted that after starting the compressor, may be used also in order to guarantee sufficiently to be freezed in cabin with battery To detect the entrance of interior heat exchanger 190 and battery heat exchanger 140 respectively, and exchanged heat according to the car heat exchanger 190 and battery The inlet temperature of device 140, adjusts the revolving speed of compressor 110, and specific implementation refers to following steps 705 to step 706.

Step 705: obtain the 7th temperature and the 8th temperature, the 7th temperature refer to the second end of the compressor be into Mouthful, first end is the inlet temperature of the car heat exchanger in the state of outlet, and the 8th temperature refers to the second of the compressor End is entrance, and first end is the inlet temperature of the battery heat exchanger in the state of outlet.

In heat management system, what is mainly controlled is the temperature of evaporator inlet refrigerant, be that is to say, interior heat exchanger 190 inlet temperature and the inlet temperature of battery heat exchanger 140.Please refer to Fig. 7 B, when compressor 110 second end be entrance, When first end is outlet, the 7th temperature refers to the Tc1 in figure, and the 8th temperature refers to the Tb1 in figure.In fact, being not difficult to manage Solution, the 7th temperature are identical as the size of the 8th temperature.

Step 706: if the 7th temperature and/or the 8th temperature are in preset temperature range, keeping the compressor Revolving speed it is constant；If the 7th temperature and/or the 8th temperature are lower than the preset temperature range, turning for the compressor is reduced Speed；If the 7th temperature and/or the 8th temperature are higher than the preset temperature range, increase the revolving speed of the compressor.

If the inlet temperature Tc1 of interior heat exchanger 190 and/or the inlet temperature Tb1 of battery heat exchanger 140 are in default In temperature range, illustrate in cabin and battery refrigeration effect is preferable, at this point it is possible to keep the revolving speed of compressor constant.

If the inlet temperature Tc1 of interior heat exchanger 190 and/or the inlet temperature Tb1 of battery heat exchanger 140 are lower than default In temperature range, illustrate in cabin and the refrigeration degree of battery is too strong, for this purpose, the revolving speed of compressor 120 can be reduced, so that Compressor 120 extrude high temperature and pressure refrigerant amount reduce, thus reduce in cabin and battery refrigeration degree.

In addition, if the car inlet temperature Tc1 of the heat exchanger 190 and/or inlet temperature Tb1 high of battery heat exchanger 140 It is inadequate to degree of freezing in cabin with battery in illustrating in preset temperature range, at this point it is possible to enhance the revolving speed of compressor 120, with So that compressor 120 extrudes the refrigerant of more high temperature and pressure, so that enhancing with the refrigeration degree of battery in cabin.

It is noted that it is above-mentioned in cabin and during battery freezes, pass through and adjusts turning for compressor 120 Speed is adjusted in cabin and the refrigeration degree of battery, improves heat management efficiency.

Further, during heat management, it also can detecte and whether need to heat the vehicle external heat exchanger 130. However, usually may be since ambient temperature is higher, for example, in summer due in cabin and when battery is required to refrigeration When the refrigerant that usually requires to freeze in cabin with battery, and flow through the vehicle external heat exchanger 130 be to be extruded from compressor 110 High temperature and pressure refrigerant, therefore, under this kind of environment, vehicle external heat exchanger 130 is less likely frosting, therefore, in this kind of feelings Under condition, it is not usually required to heat vehicle external heat exchanger 130.

Further, when not needing to heating in cabin, control triple valve 180 is straight-through, at this point, the triple valve 180, The radiator 1703, the dynamical system 1701 and the water pump 1702 are connected into a liquid cooling loop, i.e. dynamical system liquid cooling loop Liquid cooling medium in 170 is without over-heat-exchanger 160.

It is a kind of heat management device of electric car shown according to an exemplary embodiment, the dress referring to Fig. 8 A, Fig. 8 A It sets and is configured at above-mentioned Figure 1B, Fig. 1 C, in system shown in Fig. 1 D or Fig. 1 E, which can be by software, hardware or both It is implemented in combination with, which includes:

First obtains module 810, real shown in the step 301 in above-mentioned Fig. 3 A illustrated embodiment, above-mentioned Fig. 4 A for executing Apply the step 401 in example, the step 501 in above-mentioned Fig. 5 A illustrated embodiment, the step 501 in Fig. 6 A illustrated embodiment and figure Step 501 in 7A illustrated embodiment；

First adjusts control module 820, for executing the step 302 in above-mentioned Fig. 3 A illustrated embodiment, above-mentioned Fig. 4 A institute Show the step 402 in embodiment, the step 502 in above-mentioned Fig. 5 A illustrated embodiment, the step 602 in Fig. 6 A illustrated embodiment to Step 702 in step 603 and Fig. 7 A illustrated embodiment is to step 703；

Starting module 630, it is real shown in the step 303 in above-mentioned Fig. 3 A illustrated embodiment to 304, above-mentioned Fig. 4 A for executing Apply step 503 of the step 403 into 404, above-mentioned Fig. 5 A illustrated embodiment in example, the step 604 in Fig. 6 A illustrated embodiment, Step 704 in step 607 and Fig. 7 A illustrated embodiment；

Control module 840, for executing the step 305 in above-mentioned Fig. 3 A illustrated embodiment, above-mentioned Fig. 4 A illustrated embodiment In step 405, the step 507 in above-mentioned Fig. 5 A illustrated embodiment, the step 608 in Fig. 6 A illustrated embodiment.

Optionally, Fig. 8 B is please referred to, the device further include:

Second obtains module 850, for executing the step 504 in above-mentioned Fig. 5 A illustrated embodiment；

First rotational speed regulation module 860, for executing the step 505 in above-mentioned 5A illustrated embodiment.

Optionally, Fig. 8 C is please referred to, the device further include:

Third obtains module 870, for executing the step 605 in above-mentioned Fig. 6 A illustrated embodiment；

Second adjustment control module 880, for executing the step 606 in above-mentioned Fig. 6 A illustrated embodiment.

Optionally, Fig. 8 D is please referred to, the device further include:

4th obtains module 890, for executing the step 705 in above-mentioned Fig. 7 A illustrated embodiment；

Second rotational speed regulation module 812, for executing the step 706 in above-mentioned Fig. 7 A illustrated embodiment.

In embodiments of the present invention, a kind of thermal management system of electric automobile is provided, which passes through in adjustable change valve The flow direction and each shut-off valve of control of refrigerant and opening or closing for each expansion valve may be implemented to carry out heat pipe to battery Reason.Also, during heat management, when detect need to heat vehicle external heat exchanger when, can pass through control triple valve The access between dynamical system liquid cooling loop and heat exchanger is got through, the waste heat in dynamical system liquid cooling loop is passed to outside vehicle Heat exchanger to be heated to the vehicle external heat exchanger, and/or, by control electric heater the vehicle external heat exchanger is heated, To have the function that defrosting, the work for enabling the vehicle external heat exchanger stable, to guarantee stable system performance, in this way, mentioning The high heat management efficiency of electric car.

It should be understood that heat management device of electric car provided by the above embodiment is realizing electric car heat management side When method, only the example of the division of the above functional modules, in practical application, it can according to need and by above-mentioned function Distribution is completed by different functional modules, i.e., the internal structure of equipment is divided into different functional modules, to complete above retouch The all or part of function of stating.In addition, heat management device of electric car provided by the above embodiment and electric car heat management Embodiment of the method belongs to same design, and specific implementation process is detailed in embodiment of the method, and which is not described herein again.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or its any combination real It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program Product includes one or more computer instructions.It is all or part of when loading on computers and executing the computer instruction Ground is generated according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, special purpose computer, Computer network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or Person is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction Can from a web-site, computer, server or data center by it is wired (such as: coaxial cable, optical fiber, data use Family line (Digital Subscriber Line, DSL)) or wireless (such as: infrared, wireless, microwave etc.) mode to another net Website, computer, server or data center are transmitted.The computer readable storage medium can be computer can Any usable medium of access either includes the data storage such as one or more usable mediums integrated server, data center Equipment.The usable medium can be magnetic medium (such as: floppy disk, hard disk, tape), optical medium (such as: digital versatile disc (Digital Versatile Disc, DVD)) or semiconductor medium (such as: solid state hard disk (Solid State Disk, SSD)) etc..

Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..

The above is embodiment provided by the present application, all in spirit herein and original not to limit the application Within then, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.

Claims

1. a kind of thermal management system of electric automobile, which is characterized in that the system comprises: it exchanges heat outside compressor, reversal valve, vehicle Device, multiple shut-off valves, battery heat exchanger, electric heater, heat exchanger, multiple expansion valves, dynamical system liquid cooling loop and threeway Valve, wherein the battery heat exchanger is set in battery, and the multiple shut-off valve includes the first shut-off valve and the second shut-off valve；

The first end of the compressor is connect by the reversal valve with the vehicle external heat exchanger, and is connected with the vehicle external heat exchanger The access connect is equipped with first shut-off valve；The second end of the compressor passes through the reversal valve and the battery heat exchanger Connection, and the connecting path of the second end of the compressor and the battery heat exchanger is equipped with second shut-off valve；

The vehicle external heat exchanger is successively connect with the electric heater and the heat exchanger；The heat exchanger passes sequentially through institute The first expansion valve and the second expansion valve stated in multiple expansion valves are connect with the battery heat exchanger, and the heat exchanger passes through The triple valve is in parallel with the dynamical system liquid cooling loop；

The system is by adjusting the flow direction of refrigerant in the reversal valve and controlling each shut-off valve and each expansion valve The heat management realized to the battery is opened or closed, and during heat management, when needs carry out the vehicle external heat exchanger When heating, by control the triple valve get through the access between the dynamical system liquid cooling loop and the heat exchanger come pair The vehicle external heat exchanger is heated, and/or, the vehicle external heat exchanger is heated by controlling the electric heater.

2. the system as claimed in claim 1, which is characterized in that the system also includes interior heat exchanger, the interior heat exchange Device is set in cabin, and the reversal valve is four-way reversing valve；

The second end of the compressor also passes through the four-way reversing valve and connect with the interior heat exchanger；

The heat exchanger also pass sequentially through third expansion valve in first expansion valve and the multiple expansion valve with it is described Interior heat exchanger connection.

3. system as claimed in claim 2, which is characterized in that the multiple shut-off valve further includes third shut-off valve and the 4th section Only valve；The first end of the compressor also passes through the four-way reversing valve and connect with the battery heat exchanger, and the compressor The access that is connect with the battery heat exchanger of first end be equipped with the third shut-off valve, the second end of the compressor is also logical It crosses the four-way reversing valve to connect with the vehicle external heat exchanger, and the company of the second end of the compressor and the vehicle external heat exchanger It connects road and is equipped with the 4th shut-off valve.

4. a kind of electric car thermal management algorithm is applied in system described in claim 1, which is characterized in that the method Include:

It is poor based on the object detection temperature, object set temperature and object preset temperature, adjust the compressor entrance and The connection type of outlet, and the open and close of each shut-off valve and each expansion valve are controlled, the compressor is for providing system Cryogen；

Start the compressor, to utilize the system for the entrance for flowing out and finally flowing back to the compressor from the outlet of the compressor Cryogen carries out heat management to the object to be managed, and during heat management, detects whether to need to the vehicle external heat exchanger It is heated；

When need the vehicle external heat exchanger is heated when, control the triple valve get through the dynamical system liquid cooling loop with Access between the heat exchanger heats the vehicle external heat exchanger, and/or, the electric heater is controlled to described Vehicle external heat exchanger is heated.

5. method as claimed in claim 4, which is characterized in that the object detection temperature includes battery detecting temperature, described Object set temperature includes battery operating temperature, and the battery operating temperature includes maximum operating temperature and minimum operating temperature, The object preset temperature difference includes that battery preset temperature is poor；

It is described based on the object detection temperature, object set temperature and object preset temperature it is poor, adjust compressor entrance and The connection type of outlet, and control the open and close of each shut-off valve and each expansion valve, comprising:

When the difference between the minimum operating temperature and the battery detecting temperature is greater than the battery preset temperature difference, adjust Saving the reversal valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet, and described in unlatching First shut-off valve, second shut-off valve, first expansion valve and second expansion valve.

6. method as claimed in claim 5, which is characterized in that it is described during heat management, it detects whether to need to described Vehicle external heat exchanger is heated, comprising:

Detect the inlet pressure of the compressor；

If the inlet pressure of the compressor is less than minimum operating pressures that, it is determined that needs add the vehicle external heat exchanger Heat, the minimum operating pressures that refer to the minimum inlet pressure that the compressor works normally.

7. method as claimed in claim 6, which is characterized in that it is described when needing to heat the vehicle external heat exchanger, The access that the triple valve is got through between the dynamical system liquid cooling loop and the heat exchanger is controlled changed outside the vehicle Hot device is heated, and/or, it controls the electric heater and the vehicle external heat exchanger is heated, comprising:

The first temperature and second temperature are obtained, first temperature refers to the inlet temperature of the triple valve, the second temperature Refer to the temperature between the heat exchanger and first expansion valve；

If the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is greater than second temperature Degree then controls the triple valve bypass, with the access got through between the dynamical system liquid cooling loop and the heat exchanger, and The waste heat of the cold pipeline of dynamical system heat is passed into the vehicle outer heat-exchanger come to the vehicle diplomacy by the heat exchanger Parallel operation is heated；

If the inlet pressure of the compressor is less than the minimum operating pressures that, and first temperature is less than second temperature Degree, then start the electric heater, to heat by the electric heater to the vehicle external heat exchanger.

8. the method for claim 7, which is characterized in that after the control triple valve bypass, further includes:

If the inlet pressure of the compressor is continuously less than the minimum operating pressures that and duration reaches preset duration, open The electric heater is moved, to carry out auxiliary heating to the vehicle external heat exchanger by the electric heater.

9. method as claimed in claim 4, which is characterized in that the system also includes interior heat exchanger, the interior heat exchange Device is set in cabin, and the reversal valve is four-way reversing valve；The second end of the compressor also passes through the four-way reversing valve and institute State interior heat exchanger connection；The heat exchanger also passes sequentially through the third in first expansion valve and the multiple expansion valve Expansion valve is connect with the interior heat exchanger；The multiple shut-off valve further includes third shut-off valve and the 4th shut-off valve；The pressure The first end of contracting machine also passes through the four-way reversing valve and connect with the battery heat exchanger, and the first end of the compressor and institute The access for stating the connection of battery heat exchanger is equipped with the third shut-off valve, and the second end of the compressor also passes through the four-way and changes It is connect to valve with the vehicle external heat exchanger, and the second end of the compressor and the connecting path of the vehicle external heat exchanger are equipped with 4th shut-off valve；

The object to be managed further includes in the cabin, and the object detection temperature includes that temperature and battery detecting temperature are detected in cabin Degree, the object set temperature include set temperature and battery operating temperature in cabin, and the battery operating temperature includes most senior engineer Make temperature and minimum operating temperature, the object preset temperature difference include in cabin preset temperature difference and battery preset temperature it is poor；

Based on temperature, the battery detecting temperature are detected in the cabin, set temperature in the cabin, preset temperature in the cabin Poor, the described battery operating temperature and the battery preset temperature are poor, adjust the connection type of the entrance and exit of the compressor, And control the open and close of each shut-off valve and each expansion valve.

10. method as claimed in claim 9, which is characterized in that described based on detection temperature, the battery detecting in the cabin Set temperature in temperature, the cabin, preset temperature is poor in the cabin, the battery operating temperature and the battery preset temperature Difference, adjusts the connection type of the entrance and exit of the compressor, and control the unlatching of each shut-off valve and each expansion valve with It closes, comprising:

When detecting in set temperature in the cabin and the cabin, the difference between temperature is poor greater than preset temperature in the cabin, and institute When stating the difference between minimum operating temperature and the battery detecting temperature greater than the battery preset temperature difference, described four are adjusted Logical reversal valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet；

The third shut-off valve and the 4th shut-off valve are closed, and opens first shut-off valve and second cut-off Valve, and open first expansion valve, second expansion valve and third expansion valve.

11. method as claimed in claim 10, which is characterized in that after the starting compressor, further includes:

Third temperature and/or the 4th temperature are obtained, the third temperature refers to that the first end of the compressor is entrance, the pressure The second end of contracting machine is outlet and second shut-off valve open in the state of the interior heat exchanger inlet temperature, described the Four temperature refer to that the first end of the compressor is entrance, and the second end of the compressor is outlet and second shut-off valve is opened The inlet temperature of the battery heat exchanger in the state of opening；

If the third temperature and/or the 4th temperature are in preset temperature range, the revolving speed of the compressor is kept It is constant；If the third temperature and/or the 4th temperature are lower than the preset temperature range, increase turning for the compressor Speed；If the third temperature and/or the 4th temperature are higher than the preset temperature range, turning for the compressor is reduced Speed.

12. the method as described in weighing and require 9, which is characterized in that described based on detection temperature, the battery detecting temperature in the cabin Degree, set temperature in the cabin, preset temperature is poor in the cabin, the battery operating temperature and the battery preset temperature are poor, The connection type of the entrance and exit of the compressor is adjusted, and controls unlatching and the pass of each shut-off valve and each expansion valve It closes, comprising:

When detecting in set temperature in the cabin and the cabin, the difference between temperature is poor greater than preset temperature in the cabin, and institute When stating the difference between battery detecting temperature and the maximum operating temperature greater than the battery preset temperature difference, described four are adjusted Logical reversal valve makes the first end of the compressor be entrance, and the second end of the compressor is outlet；

First shut-off valve, second shut-off valve and the 4th shut-off valve are closed, and opens the third shut-off valve, And first expansion valve is closed, open second expansion valve and the third expansion valve.

13. method as claimed in claim 12, which is characterized in that after the starting compressor, further includes:

The 5th temperature and the 6th temperature are obtained, the 5th temperature refers to that the first end of the compressor is entrance, the compression The second end of machine be outlet and second shut-off valve close in the state of the battery heat exchanger inlet temperature, the described 6th Temperature refers to that the first end of the compressor is entrance, and the second end of the compressor is outlet and second shut-off valve is closed In the state of the interior heat exchanger inlet temperature；

14. method as claimed in claim 13, which is characterized in that described according to the 5th temperature, the 6th temperature, One default inlet temperature, the second default inlet temperature and preset temperature are poor, and revolving speed and/or the control for adjusting the compressor are each The open and close of shut-off valve and each expansion valve, comprising:

When to be greater than the preset temperature poor for the difference between the 5th temperature and the first default inlet temperature, and described the When difference between two default inlet temperatures and the 6th temperature is greater than the preset temperature difference, increase turning for the compressor Speed, and the step of obtaining the 5th temperature and six temperature is continued to execute, until the 5th temperature and the described first default entrance Difference between temperature is poor less than the preset temperature, and the difference between the second default inlet temperature and the 6th temperature When value is less than the preset temperature difference, keep the revolving speed of the compressor constant.

15. method as claimed in claim 14, which is characterized in that after the revolving speed for keeping the compressor is constant, also Include:

When to be greater than the preset temperature poor for the difference between the 5th temperature and the first default inlet temperature, and described the When the absolute value of the difference of six temperature and the described second default inlet temperature is less than the preset temperature difference, the third cut-off is opened Valve and the 4th shut-off valve close first shut-off valve and second shut-off valve, and open first expansion valve, institute State the second expansion valve and the third expansion valve.

16. method as claimed in claim 15, which is characterized in that described to open the third shut-off valve and the 4th cut-off Valve closes first shut-off valve and second shut-off valve, and opens first expansion valve, second expansion valve and institute After stating third expansion valve, further includes:

Increase the aperture of first expansion valve；

Difference when the aperture of first expansion valve is maximum, between the 5th temperature and the first default inlet temperature Value is still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the described second default inlet temperature still less than The preset temperature is poor, increases the revolving speed of the compressor；

When to be greater than the preset temperature poor for the difference between the described first default inlet temperature and the 5th temperature, and described the When the absolute value of the difference of six temperature and the described second default inlet temperature is less than the preset temperature difference, reduce first expansion The aperture of valve；When the aperture of first expansion valve is minimum, the first default inlet temperature and the 5th temperature it Between difference be still greater than that the preset temperature is poor, and the absolute value of the difference of the 6th temperature and the described second default inlet temperature It is poor still less than the preset temperature, reduce the revolving speed of the compressor；

When the absolute value of the difference of the 5th temperature and the described first default inlet temperature is poor and described less than the preset temperature When difference between 6th temperature and the second default inlet temperature is greater than the preset temperature, increase first expansion valve Aperture；When the aperture of first expansion valve is maximum, the difference of the 5th temperature and the first default inlet temperature Absolute value it is poor still less than the preset temperature, and the difference between the 6th temperature and the second default inlet temperature is still Greater than the preset temperature, the revolving speed of the compressor is reduced；

When to be less than the preset temperature poor for the absolute value of the difference of the 5th temperature and the described first default inlet temperature, described the When difference between two default inlet temperatures and the 6th temperature is greater than the preset temperature difference, reduce first expansion valve Aperture.

17. the method described in claim 16, which is characterized in that after the aperture for reducing first expansion valve, also Include:

When the absolute value of the difference of the 5th temperature and the described first default inlet temperature is poor still less than the preset temperature, and institute When stating the difference between the second default inlet temperature and the 6th temperature and being still greater than the preset temperature difference, described first is opened Shut-off valve and the third shut-off valve close second shut-off valve and the 4th shut-off valve.

18. method as claimed in claim 9, which is characterized in that described based on detection temperature, the battery detecting in the cabin Set temperature in temperature, the cabin, preset temperature is poor in the cabin, the battery operating temperature and the battery preset temperature Difference, adjusts the connection type of the entrance and exit of the compressor, and control the unlatching of each shut-off valve and each expansion valve with It closes, comprising:

When detecting in the cabin, the difference in temperature and the cabin between set temperature is poor greater than preset temperature in the cabin, and institute When stating the difference between battery detecting temperature and the maximum operating temperature greater than the battery preset temperature difference, described four are adjusted Logical reversal valve makes the second end of the compressor be entrance, and the first end of the compressor is outlet；

First shut-off valve and the second shut-off valve are opened, and closes the third shut-off valve and the 4th shut-off valve, and Open first expansion valve, second expansion valve and the third expansion valve.

19. method as claimed in claim 18, which is characterized in that after the starting compressor, further includes:

The 7th temperature and/or the 8th temperature are obtained, the 7th temperature refers to that in the second end of the compressor be entrance, described The first end of compressor is the inlet temperature of the interior heat exchanger in the state of outlet, and the 8th temperature refers in the pressure The second end of contracting machine is entrance, and the first end of the compressor is the inlet temperature of the battery heat exchanger in the state of outlet；

If the 7th temperature and/or the 8th temperature are in preset temperature range, the revolving speed of the compressor is kept It is constant；If the 7th temperature and/or the 8th temperature are lower than the preset temperature range, turning for the compressor is reduced Speed；If the 7th temperature and/or the 8th temperature are higher than the preset temperature range, increase turning for the compressor Speed.

20. a kind of heat management device of electric car, which is characterized in that described device includes:

Processor and memory；

Wherein, there is computer-readable program in the memory；

The processor is by running the program in the memory, for completing any side claim 4-19 Method.