CN209274303U - A kind of heat management system of electric vehicle - Google Patents

Abstract

The utility model provides a kind of heat management system of electric vehicle, heat management system includes heat pump air conditioner component, including compressor 1, the first condenser 3 of air-source, the second condenser 4 of fluid supply, evaporator 6 and associated first electric expansion valve 5, the heat exchanger 10 of fluid supply and associated flow control valve 9, gas-liquid separator 11 and the first radiator 15, first condenser is located at the heating that in-vehicle air is used in the air-conditioning box of the electric vehicle.According to heat management system provided by the utility model, the outer air-source condenser of vehicle is eliminated, improves the heating performance of heat pump air conditioner, and be integrated with interior battery pouring-basket cooling system and electromotor cooling system, make three system combined work, makes vehicle heat management efficiency more excellent.

Description

A kind of heat management system of electric vehicle

Technical field

The utility model relates to heat management systems, the more particularly, to heat management system of electric vehicle.

Background technique

With the rapid development of electric vehicle engineering, conventional air source heat pump air-conditioning system be applied to electric car it In, but still there is following problems for conventional air source heat pump air-conditioning system:

1, when vehicle external environment temperature is lower, humidity is larger, in heat pump heating, it will lead to vehicle external heat exchanger frosting, even It freezes, seriously affects the heat exchange efficiency of vehicle external heat exchanger, need to carry out defrosting processing in time.

2, in vehicle external heat exchanger frosting, conventional heat pump air-conditioning system must first defrost to it, be refrigeration when defrosting Mode cannot heat car, and in cold winter, vehicle external heat exchanger defrosting time is longer, and car passes through car body Again relatively acutely, vehicle interior temperature will be greatly reduced, and seriously affect interior comfort for heat dissipation.

3, the fever of electric control and the fever of battery pack are not efficiently used, this partial heat is wasted.

4, at low ambient temperatures (0 DEG C~-20 DEG C) operation when, compressor air suction temperature is low, and must in order to meet heating High-temperature exhaust air must be kept, causes the heating performance of heat pump system poor.

5, under summer superhigh temperature weather (45 DEG C or more), the radiator in electromotor cooling system is under such severe temperature The temperature of motor coolant liquid effectively can not be reduced to design object value hereinafter, influencing traffic safety and vehicle performance.

Therefore, in order to improve electric car car passenger by bus experience sense, there is an urgent need for a kind of heat for electric vehicle Management system can overcome deficiency existing for above-mentioned conventional air source heat pump air-conditioning system, improve capacity usage ratio and to multiply Vehicle passenger provides good experience sense by bus.

Utility model content

A brief summary of one or more aspects is given below to provide to the basic comprehension in terms of these.This general introduction is not The extensive overview of all aspects contemplated, and be both not intended to identify critical or decisive element in all aspects also non- Attempt to define the range in terms of any or all.Its unique purpose is to provide the one of one or more aspects in simplified form A little concepts are with the sequence for more detailed description given later.

One side according to the present utility model provides a kind of heat management system of electric vehicle, comprising:

Heat pump air conditioner component, including compressor 1, the first condenser 3 of air-source, the second condenser 4 of fluid supply, evaporation The heat exchanger 10 and associated flow control valve 9, gas-liquid separator of device 6 and associated first electric expansion valve 5, fluid supply 11 and first radiator 15, first condenser be located at the heating that in-vehicle air is used in the air-conditioning box of the electric vehicle,

The wherein compressor 1, first condenser 3, the flow control valve 9, the heat exchanger 10 and the gas Liquid/gas separator 11 constitute the first refrigerant circuit, the compressor 1, second condenser 4, first electric expansion valve 5, The evaporator 6 and the gas-liquid separator 11 constitute second refrigerant circuit, and the compressor 2 is divided by the first triple valve 2 It is not coupled to first condenser 3 and second condenser 4,

Second condenser 4 and first radiator 15 constitute coolant circuit,

In a heating mode, first triple valve 2, which is switched to, makes the compressor 1 via first refrigerant circuit Circularly cooling agent,

In cooling mode, first triple valve 2, which is switched to, makes the compressor 1 via the second refrigerant circuit Circularly cooling agent, second condenser 4 is via the coolant circuit circulating cooling liquid.

In one embodiment, the compressor 1, first condenser 3, first electric expansion valve 5, the evaporation Device 6 and the gas-liquid separator 11 constitute the 5th refrigerant circuit, and under dehumidification mode, the flow control valve 9 is closed, institute Stating the first triple valve 2 and being switched to makes the compressor 1 via the 5th refrigerant circuit circularly cooling agent.

In one embodiment, the heat exchanger 10, automatically controlled 23 and motor 24 the composition motor cooling with the electric vehicle Circuit, in a heating mode, the coolant liquid of motor cooling circuit are radiated via the heat exchanger 8.

It in one embodiment, further include battery cooler 8, the first solenoid valve 17, third threeway in the coolant circuit One end of valve 19, the battery pack 18 of the electric vehicle is coupled to 8 He of battery cooler by first solenoid valve 17 Between second condenser 4, the other end is coupled to first radiator 15 and described by the third triple valve 19 Between two condensers 4, the battery pack 18, first radiator 15 and the battery cooler 8 constitute battery pack and cool back Road, the compressor 1, second condenser 4, the second electric expansion valve 7 and the battery cooler 8 constitute third refrigerant Circuit, in cooling mode, second electric expansion valve 7 are opened, and make the compressor 1 while via the second refrigerant Circuit and the third refrigerant circuit circularly cooling agent, the conducting of the first solenoid valve 17 and the third triple valve 19 3 To conducting, the battery pack is flowed through to the cooling liquid part that flows out from the battery cooler 8 via first solenoid valve 17 18 with the cooling battery pack 18.

In one embodiment, the 4th triple valve 14 is equipped between first radiator 15 and the third triple valve 19, The third end of 4th triple valve 14 is coupled between first radiator 15 and the battery cooler 8, the motor The 5th triple valve 27, the 5th threeway are equipped between the heat exchanger 10 and the motor 24 and automatically controlled 23 in cooling circuit The third end of valve 27 is coupled between the third triple valve 19 of the battery pack cooling circuit and the 4th triple valve 14, The third end of the third triple valve 19 between the battery pack 18 and first radiator 15 is coupled to the described 5th 3 Between port valve 27 and the motor 24 and automatically controlled 23, second is equipped between first solenoid valve 17 and second condenser 4 Solenoid valve 20, in the case where motor heat recovery heats battery pack mode, the 4th triple valve 14 is switched to bypass described first and dissipates Hot device 15, the conducting of the first solenoid valve 17, the closing of the second solenoid valve 20, the third triple valve 19 and the described 5th 3 Port valve 27, which is switched to, makes the battery pack 18, the motor 24, the automatically controlled 23, heat exchanger 10 and 8 shape of battery cooler At cooling circuit, to be the battery pack 18 heating by the heat of the motor 24 and automatically controlled 23.

In one embodiment, which further includes the heater cores 21 in air-conditioning box, the heater cores 21 one end is coupled to the battery cooler 8 and first solenoid valve 17 and second electromagnetism by the 6th triple valve 16 Between the tie point of valve 20, the other end is coupled to the tie point of first solenoid valve 17 and the second solenoid valve 20, in electricity Under machine battery packet heat recovery heating mode, first solenoid valve is opened, the second solenoid valve closes the 20, the described 6th 3 Port valve 16, the third triple valve 19, the 5th triple valve 27, which are switched to, makes the motor 24, the automatically controlled 23, heat exchanger 10, the battery cooler 8, the heater cores 21 and the battery pack 18 form cooling circuit, to utilize the battery pack 15 and the motor 24, automatically controlled 23 heat supply 21 heating of heater cores.

In one embodiment, which further includes the second radiator 26, second radiator 26 and the electricity The second triple valve 25 is equipped between machine 24, the third end of second triple valve 25 is coupled to second radiator 26 and described Between heat exchanger 8, the compressor 1, second condenser 4, the flow control valve 9, the heat exchanger 10 and the gas Liquid/gas separator 11 constitutes the 4th refrigerant circuit, and in cooling mode, the flow control valve 9 is opened, so that the refrigeration Agent 2 is simultaneously via the second refrigerant circuit, the third refrigerant circuit and the 4th refrigerant circuit circularly cooling Agent, second triple valve 25, which is switched to, makes motor cooling circuit flow through second radiator 26, the 5th triple valve 27, The third triple valve 19, which is switched to, disconnects the motor cooling circuit and battery pack cooling circuit.

It in one embodiment, further include heater in the battery pack cooling circuit.

According to heat management system provided by the utility model, the outer air-source condenser of vehicle is eliminated, heat pump sky is improved The heating performance of tune, and it is integrated with interior battery pouring-basket cooling system and electromotor cooling system, make three system combined work, allows Vehicle heat management efficiency is more excellent.

Detailed description of the invention

After the detailed description for reading embodiment of the disclosure in conjunction with the following drawings, it better understood when that this is practical new The features described above and advantage of type.In the accompanying drawings, each component is not necessarily drawn to scale, and with similar correlation properties or The component of feature may have same or similar appended drawing reference.

Fig. 1 shows the schematic diagram of heat management system provided by the utility model.

Fig. 2 shows the schematic diagrames that heat management system provided by the utility model works in cooling mode.

Fig. 3 shows the schematic diagram that heat management system provided by the utility model works under battery pack refrigerating mode.

Fig. 4 shows the schematic diagram that heat management system provided by the utility model works in a heating mode.

Fig. 5 shows the schematic diagram that heat management system provided by the utility model works under battery pack heating mode.

Fig. 6 shows schematic diagram of the heat management system provided by the utility model in the case where recycling heating work mode.

Fig. 7 shows schematic diagram of the heat management system provided by the utility model under dehumidification mode.

Fig. 8 shows schematic diagram of the heat management system provided by the utility model under bad weather mode.

Appended drawing reference

Compressor 1

Triple valve 2

Internal condensation device 3

Condenser 4

Electric expansion valve 5

Interior evaporator 6

Electric expansion valve 7

Battery cooler 8

Flow control valve 9

Heat exchanger 10

Gas-liquid separator 11

Water pump 12

High-pressure water-heating heater 13

Triple valve 14

Radiator 15

Triple valve 16

Solenoid valve 17

Battery pack 18

Triple valve 19

Solenoid valve 20

Assist heater cores 21

Water pump 22

Automatically controlled 23

Motor 24

Triple valve 25

Radiator 26

Triple valve 27

Specific embodiment

The utility model is described in detail below in conjunction with the drawings and specific embodiments.Note that below in conjunction with attached drawing and tool The aspects of body embodiment description is merely exemplary, and is understood not to carry out the protection scope of the utility model any Limitation.

Although as described above, can by existing conventional air source heat pump air-conditioning system be applied to electric car in, In real work, there are many problems for conventional air heat pump air conditioning system, in particular, being applied on electric car, the above problem is more For protrusion.Therefore, the utility model provides a kind of heat management system, can be avoided the above problem, so that heat exchanger effectiveness is more Height, vehicle heat management performance are more excellent.

Fig. 1 shows the schematic diagram of heat management system provided by the utility model.Heat pipe provided by the utility model Reason system is broadly divided into three circuits, and respectively heat pump air conditioner circuit, battery pouring-basket cooling system circuit and electromotor cooling system returns Road.Specifically, heat pump air conditioner circuit includes: compressor 1, triple valve 2, internal condensation device 3, condenser 4, electric expansion valve 5, vehicle Interior evaporator 6, electric expansion valve 7, battery cooler 8, flow control valve 9, heat exchanger 10, gas-liquid separator 11.This part Circuit primarily serves the main refrigerant of heat management system provided by the utility model, heat-production functions.

Battery pouring-basket cooling system circuit includes: water pump 12, high-pressure water-heating heater 13, triple valve 14, radiator 15, battery Cooler 8, triple valve 16, solenoid valve 17, battery pack 18, triple valve 19.It will be appreciated by those skilled in the art that battery pack is cooling System circuit is to pass through battery in heat management system provided by the utility model applied to the basic configuration of electric car Heat pump air conditioner circuit and battery pack circuit are combined together by cooler 8, are cooled down using heat pump air conditioner to battery pack, battery pack Calorific value can be transmitted to warm air system by pipeline, improve the capacity usage ratio of vehicle, more energy efficient.

Electromotor cooling system circuit include: water pump 22, automatically controlled 23, motor 24, triple valve 25, radiator 26, heat exchanger 10, Triple valve 27.Those skilled in the art, which answer, to be known, electromotor cooling system circuit is the basic configuration applied to electric car, In heat management system provided by the utility model, heat pump air conditioning system and electromotor cooling system are incorporated in by heat exchanger 10 Together, using heat pump air conditioning system, motor cooling water makes as heat source to motor cooling water temperature or when heat pump air conditioner heats With the calorific value of electric control is also utilized in warm air system in electromotor cooling system, is heated for crew module, and vehicle energy is improved Utilization rate is measured, it is more energy efficient.

Heat management system provided by the utility model further includes auxiliary heater cores 21, and above-mentioned auxiliary heater cores 21 can be with It is crew module's heating for recycling the heat of electric control and battery pack, this partial circuit can provide for heat management system The heat-production functions of auxiliary realize energy regenerating.

Heat management system provided by the utility model has multiple-working mode, specifically opens up below with reference to Fig. 2-Fig. 8 Open the concrete condition of each operating mode.

Fig. 2 shows the schematic diagram of heat management system provided by the utility model work in cooling mode.Such as Fig. 2 institute Show, enters condenser 4 by triple valve 2 through the compressed high-temperature high-pressure refrigerant of compressor 1, then pass through electric expansion valve 5 Throttling become the refrigerant of low-pressure low-temperature, evaporator 6 into the car, to air cooling-down into the car.Evaporator 6 in the car In, the heat of refrigerant suction air into the car becomes low-pressure superheated steam, to play the effect for reducing vehicle interior temperature, refrigeration Fruit.The refrigerant of low-pressure superheated steam form subsequently enters gas-liquid separator 11, is then return to compressor 1, realizes refrigeration cycle. At this point, electric expansion valve 7 and flow control valve 9 are turned off in heat pump air conditioning system.

In the hydraulic fluid side of condenser 4, coolant liquid passes through water pump 12, successively passes through PTC13, triple valve 14, then coolant liquid Into low-temperature radiator 15, the heat of coolant liquid passes to outdoor air by cryogenic heat exchanger 15, and then coolant liquid is by electricity Pond cooler 8, triple valve 16, solenoid valve 20, return to condenser 4, at this point, solenoid valve 17 is closed.

Fig. 3 shows heat management system work provided by the utility model and also carries out to battery pack while refrigeration mode Cooling schematic diagram.As shown in figure 3, in heat pump air conditioning system, electric expansion valve 7 is opened, refrigerant stream compared with mode 1 Through battery cooler 8, in battery cooler 8, the heat of refrigerant suction coolant liquid becomes low-pressure superheated steam, to battery pack Coolant liquid is cooled down.Meanwhile in battery pouring-basket cooling system, in such a way that solenoid valve 17 is opened, a part of coolant liquid Battery pack is cooled down into battery pack 18.

Fig. 4 shows the schematic diagram of heat management system work provided by the utility model in a heating mode.In above-mentioned system Under heat pattern, compressor 1 needs work to provide enough heats.Specifically, as shown in figure 4, through the compressed height of compressor 1 Warm high-pressure refrigerant enters internal condensation device 3 by triple valve 2, and refrigerant transfers heat to air, sent after air heating Enter crew module, is crew module's heating.

By the way that internal condensation device 3 is set up directly on the mode in the air-conditioning box of electric vehicle, enable to from compressor 1 The direct heat release of the high-temperature high-pressure refrigerant reserved, is passenger's heating in the form of hot wind, and heat exchanger effectiveness is higher.

Under above-mentioned heating mode, it can be seen that be condensed into subcooled liquid after refrigerant heat dissipation, subcooled liquid passes through flow The throttling of regulating valve 9 becomes the refrigerant of low-pressure low-temperature, into heat exchanger 10.In heat exchanger 10, refrigerant suction motor is cold But the heat of liquid becomes low-pressure superheated steam, subsequently into gas-liquid separator 11, is then return to compressor 1.At this point, in heat pump sky In adjusting system, electric expansion valve 5 and 7 is turned off.In electromotor cooling system, coolant liquid passes through water pump 22, sequentially enters automatically controlled 23, motor 24, triple valve 25 return to water pump 22 by triple valve 27 subsequently into heat exchanger 10.

Heat exchanger 10 is a part in electromotor cooling system circuit, at work due to vehicle, needs to drop motor Temperature with guarantee vehicle can even running the cooling of motor is realized by the second radiator 26 in the prior art.In this implementation In example, since refrigerant is low-pressure low-temperature state, it can use some refrigerant and motor cooled down, do not waste system Compared with the radiating efficiency of the second radiator 26 while cryogen energy, the motor radiating of highly efficient rate can be played the role of.This Utility model bypasses above-mentioned second radiator 26 by way of triple valve 25 is arranged, so that the cooling of coolant liquid is relied on to flow through and be changed Coolant liquid rather than the operation of the second radiator 26 in hot device 10.It is more energy saving and improve vehicle heat exchanger effectiveness.

Fig. 5 shows heat management system work provided by the utility model in the schematic diagram of battery pack heating mode.It is electronic The battery pack of automobile can be described as the energy source of electric car, thus become particularly important for the maintenance of battery pack, battery Packet temperature is excessively high, temperature distribution is non-uniform and temperature is too low can all impact the service life of battery pack.At low ambient temperatures, Electrochemical reaction inside battery pack can not be operated normally due to receiving low temperature effect, and therefore, it is necessary to add to battery pack Heat.It is to be realized by the way that high-pressure water-heating heater PCT13 is arranged in battery pack circuit in the prior art.And in fact, due to vehicle Motor there is extra heat to be shed at work, can use the partial heat come for battery pack heating.Specifically, such as Shown in Fig. 5, coolant liquid passes through water pump 22, sequentially enters automatically controlled 23, motor 24, temperature increases after coolant liquid absorbs electric control heat Add, then in turn through triple valve 25, heat exchanger 10, triple valve 27, water pump 12, PTC13, triple valve 14, battery cooler 8, Triple valve 16, solenoid valve 17, subsequently into battery pack 18, at this point, coolant liquid heats battery pack 18, last coolant liquid passes through three Port valve 19 returns to water pump 22.The coolant liquid circulation loop realizes the function that recycling electric control heat is battery pack heating.

Fig. 6 shows heat management system work provided by the utility model in the schematic diagram of recycling heating mode.In such as Fig. 4 Shown under heating mode, heat mostlys come from the acting of compressor 1.And during vehicle operation, motor and battery pack Heat can be persistently distributed, this partial heat is can use as passenger inside the vehicle's heating, does work, can play without compressor 1 Energy recycling, energy-efficient effect.Specifically, as shown in fig. 6, coolant liquid sequentially enters automatically controlled 23, motor by water pump 22 24, temperature increases after coolant liquid absorbs electric control heat, then in turn through triple valve 25, heat exchanger 10, triple valve 27, water Pump 12, PTC13, triple valve 14, battery cooler 8, triple valve 16, then coolant liquid enters auxiliary heater cores 21, to entrance The air of crew module heats, and then passes through solenoid valve 17, and into battery pack 18, last coolant liquid returns to water pump by triple valve 19 22。

In the coolant circulation system, battery pack 18, automatically controlled 23, motor 24 calorific value are absorbed by coolant liquid, cooling Liquid temperature increases, and in auxiliary heater cores 21, coolant liquid efficiently uses electric control and electricity to air heating into the car Crew module's heating is given in the calorific value of Chi Bao.

Under conditions of not turning on the aircondition system, vehicle energy can be saved using the auxiliary heating mode, improved in winter When electric car mileage travelled.In order to reach better heating effect, air-conditioning system can also be opened, allows auxiliary heating system It is worked at the same time with air-conditioning system, improves heating effect.

Fig. 7 shows schematic diagram of the heat management system work provided by the utility model under dehumidification mode.On rainy day, Interior humid air can not only cause the body-sensing of passenger inside the vehicle uncomfortable, can also form fog on interior glass for vehicle window, block and drive The sight for the person of sailing, influences traffic safety.Therefore, it is necessary to dehumidify to in-vehicle air, specifically, as shown in fig. 7, through compressor 1 compressed high-temperature high-pressure refrigerant enters internal condensation device 3 by triple valve 2, and high temperature refrigerant is removed to by the cooling of evaporator 6 Wet air heating, is condensed into subcooled liquid after refrigerant heat dissipation, then becomes low-pressure low-temperature by the throttling of electric expansion valve 5 Refrigerant, evaporator 6 into the car carry out cool-down dehumidification to air into the car, finally, refrigerant in evaporator 6 Into gas-liquid separator 11, it is then return to compressor 1.Into crew module air successively pass through the cool-down dehumidification of evaporator 6 with And the heating of internal condensation device 3, crew module is entered with suitable temperature, achievees the effect that dehumidifying.

Fig. 8 shows schematic diagram of the heat management system work provided by the utility model under bad weather mode.Ability Field technique personnel should be known that the presence due to motor, battery pack, and the running environment of vehicle is more harsh, in particular, vehicle is on road On face when form, various extreme weathers, such as heat are frequently encountered.Under summer atrocious weather, 45 DEG C or more, at this moment Car needs to freeze, and battery pack needs to cool down, and motor also needs to cool down, and therefore, in existing technology, only passes through the first heat dissipation The temperature of motor coolant liquid possibly can not be reduced to design object value under such severe temperature by device 15 and the second radiator 26, Influence safety and vehicle performance.To solve the above-mentioned problems, the utility model is in electromotor cooling system, in addition to radiator 26 with Outside, by increasing heat exchanger 10, the temperature of motor coolant liquid can be further decreased, guarantees cooling effect of motor.It is cold in battery But it in system, is radiated together by radiator 15 and battery cooler 8, battery coolant temperature can be further decreased, guaranteed Battery cooling effect.

In battery pouring-basket cooling system, coolant liquid is successively passed through after radiator 15 and battery cooler 8, and temperature reduces, A part of coolant liquid enters battery pack 18 by solenoid valve 17, radiates to battery pack.

So far, it has been explained that the concrete condition of the different working modes of heat management system provided by the utility model.? In heat management system provided by the utility model, the outer air-source condenser of vehicle is eliminated, vehicle external heat exchanger can be effectively avoided Frosting problem also avoids heat pump air conditioner at low ambient temperatures and heats unstable problem, and heat pump air conditioning system is not only to occupant Freezed in cabin and heated, additionally it is possible to which battery and motor are cooled down.Even at (- 20 DEG C) at low ambient temperatures, by In there is no to vehicle external heat exchanger defrost the problem of, heat pump air conditioning system heating performance is still fine.The fever quilt of electric control Battery pouring-basket cooling system utilizes, and recycles to the energy of electric control, is heated using the heat of motor to battery pack.Electricity The fever of Electrical Control and battery pack can also be utilized by warm air system, be used to be crew module's heating.Under bad working environments, in environment Under ultra-high temperature condition (45 DEG C or more), heat pump air conditioning system conjunction with motor cooling system and battery pouring-basket cooling system are combined Work carries out vehicle heat management, improves vehicle heat management performance.It, will be hot according to heat management system provided by the utility model Pump air conditioner system is integrated in the prior art for the electromotor cooling system of electric vehicle and battery pouring-basket cooling system to carry out vehicle Heat management, makes interrelated between three systems, takes full advantage of vehicle energy, has saved energy.

Offer is to make any person skilled in the art all and can make or use this public affairs to the previous description of the disclosure It opens.The various modifications of the disclosure all will be apparent for a person skilled in the art, and as defined herein general Suitable principle can be applied to other variants without departing from the spirit or scope of the disclosure.The disclosure is not intended to be limited as a result, Due to example described herein and design, but should be awarded and principle disclosed herein and novel features phase one The widest scope of cause.

Claims (8)

1. a kind of heat management system of electric vehicle characterized by comprising

Heat pump air conditioner component, including compressor (1), the first condenser (3) of air-source, the second condenser (4) of fluid supply, steaming Send out device (6) and associated first electric expansion valve (5), the heat exchanger (10) of fluid supply and associated flow control valve (9), Gas-liquid separator (11) and the first radiator (15), first condenser (3), which is located in the air-conditioning box of the electric vehicle, to be used In the heating of in-vehicle air,

The wherein compressor (1), first condenser (3), the flow control valve (9), the heat exchanger (10) and institute It states gas-liquid separator (11) and constitutes the first refrigerant circuit, the compressor (1), second condenser (4), first electricity Sub- expansion valve (5), the evaporator (6) and the gas-liquid separator (11) constitute second refrigerant circuit, the compressor (1) It is respectively coupled to first condenser (3) and second condenser (4) by the first triple valve (2),

Second condenser (4) and first radiator (15) constitute coolant circuit.

2. heat management system as described in claim 1, which is characterized in that the compressor (1), first condenser (3), First electric expansion valve (5), the evaporator (6) and the gas-liquid separator (11) constitute the 5th refrigerant circuit.

3. heat management system as described in claim 1, which is characterized in that the heat exchanger (10), with the electric vehicle Automatically controlled (23) and motor (24) constitute motor cooling circuit.

4. heat management system as claimed in claim 3, which is characterized in that further include battery cooler in the coolant circuit (8), the first solenoid valve (17), third triple valve (19),

One end of the battery pack (18) of the electric vehicle is coupled to the battery cooler by first solenoid valve (17) (8) between second condenser (4), the other end is coupled to first radiator by the third triple valve (19) (15) between second condenser (4), the battery pack (18), first radiator (15) and the battery cooler (8) battery pack cooling circuit is constituted,

The compressor (1), second condenser (4), the second electric expansion valve (7) and the battery cooler (8) are constituted Third refrigerant circuit.

5. heat management system as claimed in claim 4, which is characterized in that first radiator (15) and the third threeway The 4th triple valve (14) is equipped between valve (19), the third end of the 4th triple valve (14) is coupled to first radiator (15) between the battery cooler (8),

The five or three is equipped between the heat exchanger (10) in the motor cooling circuit and the motor (24) and automatically controlled (23) The third end of port valve (27), the 5th triple valve (27) is coupled to the third triple valve of the battery pack cooling circuit (19) third between the 4th triple valve (14), between the battery pack (18) and first radiator (15) The third end of triple valve (19) is coupled between the 5th triple valve (27) and the motor (24) and automatically controlled (23), and described Second solenoid valve (20) are equipped between one solenoid valve (17) and second condenser (4).

6. heat management system as claimed in claim 5, which is characterized in that further include the heater cores in air-conditioning box (21), one end of the heater cores (21) is coupled to the battery cooler (8) and described the by the 6th triple valve (16) Between one solenoid valve (17) and the tie point of the second solenoid valve (20), the other end be coupled to first solenoid valve (17) and The tie point of the second solenoid valve (20).

7. heat management system as claimed in claim 6, which is characterized in that further include the second radiator (26), described second dissipates The second triple valve (25) are equipped between hot device (26) and the motor (24), the third end of second triple valve (25) is coupled to Between second radiator (26) and the heat exchanger (10),

The compressor (1), second condenser (4), the flow control valve (9), the heat exchanger (10) and the gas Liquid/gas separator (11) constitutes the 4th refrigerant circuit.

8. heat management system as claimed in claim 4, which is characterized in that further include heating in the battery pack cooling circuit Device.