CN115675013A

CN115675013A - Multi-working-condition finished automobile thermal management system and method for new energy electric automobile

Info

Publication number: CN115675013A
Application number: CN202211455864.3A
Authority: CN
Inventors: 孟娟
Original assignee: Shanghai Yinlun Heat Exchange System Co ltd
Current assignee: Shanghai Yinlun Heat Exchange System Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-02-03

Abstract

The multi-working-condition finished automobile thermal management system and method for the new energy electric automobile comprise a refrigerant circulation loop and a cooling liquid circulation loop, wherein the refrigerant circulation loop and the cooling liquid circulation loop exchange heat through a water-cooled condenser (11) and a battery cooler (14); the heat exchange management of the motor (18), the battery pack (15) and each loop of the passenger compartment is carried out through the kettle (17), and then the heat is redistributed to each loop for utilization; the system realizes a plurality of working modes including a refrigeration mode, a heating mode, a series/parallel dehumidification defrosting mode, a battery quick charge cooling mode, a battery heating mode, a low-temperature compressor self-heating mode, a waste heat recycling mode and the like. The refrigerant system has wide working condition application range, strong adaptability and complete functions, and can be matched with different refrigerant system architectures for use. The system heating operation temperature can be detected downwards, the power consumption of the whole vehicle is reduced, the energy consumption is reduced, the energy is saved, the energy utilization rate is improved, and the heat management requirements of the passenger compartment and the battery pack under different working conditions can be met.

Description

Multi-working-condition finished automobile thermal management system and method for new energy electric automobile

Technical Field

The invention belongs to special heating, cooling and ventilating equipment for a passenger room or a cargo room of an IPC (International patent Classification) B60H1 vehicle, and relates to a whole vehicle heat management system of a new energy electric vehicle, which comprises a plurality of operation modes and is suitable for different working conditions.

Background

In order to comply with national policies and environmental calls, new energy automobiles are being developed greatly, but the problem of mileage anxiety is an important factor for limiting the development of new energy automobiles. In order to solve the problem, technologies such as a large-capacity battery and super quick charging are adopted, and accordingly the problems of battery temperature limitation, waste heat of a motor, safety and the like are gradually exposed to the eyes of people. How to reasonably control the temperature of the battery and how to recycle the waste heat of the motor and the like puts higher requirements on the battery and the motor heat management system, and the heat management system also becomes an important factor influencing the market competitiveness of the new energy automobile. In addition, when heating in winter, because the low heat pump heating efficiency of ambient temperature is not high, can't satisfy passenger's travelling comfort requirement, the general tradition of prior art adopts heating element (like PTC) or utilizes the waste heat to satisfy winter heating demand. On one hand, the energy efficiency ratio of the traditional PTC electric heating is always smaller than 1, and the PTC heating consumes a large amount of battery energy to influence the driving mileage. On the other hand, when the waste heat is utilized for heating, parts are increased, the system structure is more complex, and the water channel side and the refrigerant side are not made into universal adaptation. How to improve the travelling comfort of new energy automobile, how to improve the compactness and the general suitability of thermal management system, whole car thermal management technique receives more and more attention.

Although the above problems are widely noticed in the art, the existing disclosures of related new technical solutions still do not address the needs of solving the practical problems.

An automobile engine heat management device and a heat management control method thereof-201510419767.2, which are disclosed by Zhejiang Jili powertrain Co. The automobile engine heat management device comprises a heat management device body, a water pump and a generator mounting support are arranged on the heat management device body, an electronic thermostat is arranged in the heat management device body, an electronic thermostat cover plate is arranged outside the electronic thermostat, and the electronic thermostat cover plate is connected with the heat management device body. The thermal management control method comprises the following steps: the strategy of realizing cylinder body water inlet and cylinder body water outlet can ensure that high-temperature cooling water passing through the cylinder body and the cylinder cover passes through the cylinder body water jacket again, so that the combustion chamber is kept at a relatively high temperature level, better combustion is realized, the combustion efficiency is improved, and the emission is reduced.

A thermal management system of a range-extended hybrid electric vehicle and a control method thereof are disclosed by Dongfeng group of cars, inc. -202110776645.4, which comprises an engine cooling water loop, a warm air water loop, a motor cooling oil loop, an air-conditioning refrigeration loop, a battery cooling water loop, the engine cooling water loop and the warm air water loop realize series connection or independent operation through a four-way reversing valve, the engine cooling water loop and the motor cooling oil loop realize heat exchange through a second heat exchanger, the warm air water loop and the battery cooling water loop realize heat exchange through a first heat exchanger, and the modulated cold loop and the battery cooling water loop realize heat exchange through a Chiller.

Automobile battery thermal management system, automobile thermal management system and electric automobile-202010738220. X, published by Bianddy corporation; 112706578B relates to a vehicle battery thermal management system, a vehicle thermal management system and an electric vehicle. The method comprises the following steps: the self-heating circuit is connected with a heat conducting piece of an automobile air conditioning system and a self-heating circuit of an automobile power battery; the heat conducting piece, the compressor and the outdoor condenser form a battery refrigeration loop, and the battery refrigeration loop absorbs the heat of the power battery through a refrigerant in the heat conducting piece to cool the power battery; the self-heating circuit and the power battery form a battery self-heating loop, and the power battery realizes high-frequency alternate charging and discharging through the self-heating circuit in the battery self-heating loop so as to carry out self-heating.

Heat management method-201911163394.1 of an air conditioner/heat pump system of a new energy automobile disclosed by the university of Xian transportation; 111002782B relates to a heat pump/air conditioning system of a new energy automobile. The heat source can be combined and changed at will, has various operating conditions, and is suitable for hybrid electric vehicles, fuel cell vehicles or any cold and heat source needing combined and changed and the conditions are various and complicated. Through valve adjustment, the internal heat exchanger, the external heat exchanger and the heat exchanger can be mutually combined to serve as a heat source or a cold source, the heating and refrigerating requirements in the passenger compartment are met, meanwhile, the functions of heat dissipation/waste heat recovery or heating on a power system are not influenced, and the heat management requirements in the vehicle can be reasonably distributed. The whole set of heat pump/air conditioning system can be regulated into 6 operation modes, and 12 use working conditions are met.

These existing problems are mainly focused on:

the first disadvantage is that: at present, the design and application of a waterway heat management system are less, and schemes with plans of waste heat recovery, battery cooling and the like are less;

the second defect: the practical applicability and the adaptability of the existing waterway heat management system are not strong, a set of waterway heat management system corresponding to the design of a refrigerant system is needed, and the waterway heat management system has many parts and complex structures.

The third disadvantage is that: at present, the mode of a thermal management system of a new energy automobile is few, the range of applicable working conditions is narrow, and the thermal management requirements of a passenger compartment and a battery pack of the whole automobile under different working conditions cannot be met.

In order to solve the defects, an innovative whole new energy automobile heat management method is required to be provided.

Disclosure of Invention

The invention aims to provide a multi-working-condition finished automobile heat management system and a method for a new energy electric automobile, which are used for recovering waste heat, can realize multiple working modes of refrigeration, heating, serial/parallel dehumidification, defrosting, battery quick charge cooling, battery heating mode, low-temperature compressor self-heating, waste heat recovery and utilization and the like, and are applicable to a wide working condition range, and solve the problems that the current heat management system is narrow in applicable working condition range, difficult in battery super quick charge temperature control management, poor in adaptability of the heat management system and the like.

The aim of the invention is achieved by the following technical measures: the system comprises a refrigerant circulation loop and a cooling liquid circulation loop, wherein the refrigerant circulation loop and the cooling liquid circulation loop exchange heat through a water-cooled condenser and a battery cooler; the heat exchange management of the motor, the battery pack and each loop of the passenger compartment is carried out through the kettle and then distributed to each loop for utilization. Wherein: the refrigerant circulation loop mainly comprises a compressor, an air conditioning box, an outdoor heat exchanger, a gas-liquid separator, a valve piece, an indoor first heat exchanger, an indoor second heat exchanger and a blower. The components are connected through refrigerant pipelines. The cooling liquid circulation loop comprises a battery loop, a motor loop and a passenger compartment loop; the water heater specifically comprises a kettle, a heat dissipation water tank, a three-way valve, an electronic water pump, a battery pack, a motor and a heater, wherein all the components are connected through water pipes. The multi-working-condition operation modes of the refrigerant circulation loop and the cooling liquid circulation loop for heat exchange redistribution comprise a refrigeration mode, a refrigeration + battery cooling mode, a super quick charge mode, a passenger compartment heating mode, a heating + battery heating mode, a waste heat recovery heating mode and a serial/parallel dehumidification mode; the logic for operating the whole vehicle heat management in each working condition mode comprises the following steps:

1) When the ambient temperature is high in summer and the temperature in the passenger cabin is higher, namely equal to or higher than 35 ℃, and rapid cooling is needed, switching to a first refrigeration mode; further, if the passenger compartment and the power battery need to be cooled, a refrigerating-plus-battery cooling mode is operated;

2) When the ambient temperature in summer is high and the temperature in the passenger cabin is less than 35 ℃, the rapid cooling is not needed or the temperature in the passenger cabin is not needed to be maintained, the second refrigeration mode can be switched; further, if the temperature of the battery pack exceeds the safe temperature range of the battery operation, a refrigerating two + battery cooling mode is operated;

3) When the new energy automobile is super-charged, operating a super-fast charging mode;

4) When the environmental temperature is lower in winter, operating a heating mode of the passenger compartment; furthermore, in the process of operating the heating mode of the passenger compartment, when waste heat on the cooling liquid side can be recycled, the waste heat recovery heating mode is operated;

5) If the battery pack is operated below the safe temperature range, or if the temperature of cooling liquid in the kettle is lower than the required temperature for heating the battery pack 15, the heating mode of heating and the battery is operated;

6) When the humidity in the passenger cabin is too high, the dehumidification mode is operated; including a series dehumidification mode and a parallel dehumidification mode.

Particularly, a motor loop and a battery loop are arranged in the cooling liquid loop, and the motor loop and the battery loop are connected in series and in parallel through a passenger compartment loop; the passenger cabin is heated by recycling the waste heat of the motor, or the battery pack is heated by the electric control waste heat alone.

Particularly, as an integrated design expansion water tank assembly structure, a kettle is provided with three pairs of inlets/outlets which are respectively suitable for being communicated and connected with a motor, a battery pack and a passenger compartment circulating pipeline; the first three-way valve, the second three-way valve and the third three-way valve which are arranged on the corresponding pipelines are all of one-in two-out type structures, namely (2) port-in, (1) port-out and (3) port-out. The electronic expansion valve comprises but is not limited to a heating electronic expansion valve, a high-pressure solenoid valve, a low-pressure solenoid valve, a one-way valve, a compression electronic expansion valve, a refrigeration electronic expansion valve, a battery electronic expansion valve, a first three-way valve, a second three-way valve, a third three-way valve, a first temperature sensor, a second temperature sensor, a first temperature pressure sensor and a second temperature pressure sensor; wherein: the heating electronic expansion valve is arranged in front of the inlet of the outdoor heat exchanger, the refrigerating electronic expansion valve is arranged in front of the inlet of the first indoor heat exchanger, the battery electronic expansion valve is arranged in front of the inlet of the battery cooler, and the compression electronic expansion valve is arranged between the outlet of the compressor and the inlet of the gas-liquid separator; the high-pressure electromagnetic valve is arranged between the outlet of the water-cooled condenser and the intersection of the refrigeration electronic expansion valve and the battery electronic expansion valve, the low-pressure electromagnetic valve is arranged between the outlet of the outdoor heat exchanger and the inlet of the gas-liquid separator, the one-way valve is arranged between the outlet of the outdoor heat exchanger and the intersection of the refrigeration electronic expansion valve and the battery electronic expansion valve, the first temperature sensor is arranged at the exhaust port of the compressor, the second temperature sensor is arranged at the outlet of the outdoor heat exchanger, the first temperature pressure sensor is arranged at the outlet of the water-cooled condenser, and the second temperature pressure sensor is arranged at the gas-liquid separator. The specific connection mode of the refrigerant circulation loop and the cooling liquid circulation loop comprises the following steps:

a refrigerant circulation circuit:

the exhaust port of the compressor is branched into two paths, one path of the exhaust port of the compressor is communicated with the inlet of the gas-liquid separator 7 through a compression electronic expansion valve, the outlet of the gas-liquid separator is communicated with the air suction port of the compressor to form a closed loop, and the exhaust and air supplement of the compressor can be utilized to heat the heat pump under the working condition of low ambient temperature; the other branch of the air outlet of the compressor is communicated with a first inlet of the water-cooled condenser, the first outlet of the water-cooled condenser is branched into two paths, and one path of the first outlet of the water-cooled condenser is communicated with an inlet of the outdoor heat exchanger through a heating electronic expansion valve; the outlet of the outdoor heat exchanger is communicated with the inlet of the gas-liquid separator through a low-pressure electromagnetic valve, and the outlet of the gas-liquid separator is communicated with the air suction port of the compressor to form a closed loop; an outlet of the outdoor heat exchanger or the outlet of the outdoor heat exchanger is connected with the other branch of the first outlet of the water-cooled condenser through a connecting one-way valve and then is converged, and then branches into two paths, wherein one branch is communicated with an inlet of the indoor first heat exchanger through a connecting refrigeration electronic expansion valve, the outdoor heat exchanger is communicated with an inlet of a battery cooler through another branch of the one-way valve and through a connecting battery electronic expansion valve, an outlet of the battery cooler is communicated with an inlet of a gas-liquid separator after being converged with an outlet of the indoor first heat exchanger, and an outlet of the gas-liquid separator is communicated with an air suction port of a compressor to form a closed loop; under the working condition, the one-way valve, the refrigeration electronic expansion valve and the battery electronic expansion valve are connected in series after being connected in parallel; the high-pressure electromagnetic valve is connected with the heating electronic expansion valve and the one-way valve in parallel, and then connected with the refrigerating electronic expansion valve and the battery electronic expansion valve in series after being connected in parallel.

A coolant circulation circuit: the passenger compartment comprises a passenger compartment loop, a battery loop and a motor loop, wherein:

the connection mode of the passenger compartment loop part comprises the following steps: the kettle outlet B is communicated with the first electronic water pump inlet, the first electronic water pump outlet is communicated with the indoor second heat exchanger inlet, the indoor second heat exchanger outlet is communicated with the water-cooled condenser second inlet, the water-cooled condenser second outlet is communicated with the heater inlet, the heater outlet is communicated with the port (2) of the first three-way valve, the port (3) of the first three-way valve is communicated with the kettle inlet B, and the port (1) of the first three-way valve is communicated with the first electronic water pump inlet.

The connection mode of the battery loop part is as follows: kettle export A and second electronic pump import intercommunication, second electronic pump export and battery cooler import intercommunication, battery cooler export and group battery import intercommunication, group battery export and (2) mouthful intercommunication of second three-way valve, the (3) mouthful and the kettle import a intercommunication of second three-way valve, the (1) mouthful and the import intercommunication of second electronic pump of second three-way valve.

The motor loop connection mode is as follows: kettle export C and third electronic pump import intercommunication, third electronic pump export and motor import intercommunication, motor export and the (2) mouth intercommunication of third three-way valve, the (3) mouth and the heat dissipation water tank import intercommunication of third three-way valve, the heat dissipation water tank export converges with the (1) mouth of third three-way valve and communicates with kettle import C.

Particularly, further, the cooling liquid circulation loop relates to a water path of a finished automobile heat management system, meets the refrigerating and heating requirements of a battery, a motor and a passenger cabin in a matching manner, and realizes multi-mode switching through inlet switching of a three-way valve and starting and stopping of a water pump;

1) When the ambient temperature is high in summer, one of two cooling modes is selectively operated in the passenger compartment. When the temperature in the passenger cabin is high, namely not less than 35 ℃, and rapid cooling is needed, the cooling mode is switched to a first cooling mode, the water-cooled condenser and the outdoor heat exchanger need to be opened to operate, the outdoor heat exchanger is used as a condenser, the compression electronic expansion valve, the high-pressure electromagnetic valve, the low-pressure electromagnetic valve and the battery electronic expansion valve are closed, the heating electronic expansion valve is fully opened, and the refrigeration electronic expansion valve is throttled. When the temperature in the passenger cabin is lower than 35 ℃ and quick cooling or the temperature in the passenger cabin does not need to be maintained, the second refrigeration mode can be switched, the outdoor heat exchanger is only required to be opened to be used as a condenser, the compression electronic expansion valve, the high-pressure electromagnetic valve, the low-pressure electromagnetic valve and the battery electronic expansion valve are closed, the heating electronic expansion valve is opened, and the refrigeration electronic expansion valve is throttled.

2) In the first cooling mode, if the temperature of the battery pack does not exceed the safe temperature range of the battery operation, the battery pack performs self-circulation without cooling. If the temperature of the battery pack exceeds the safe temperature range for battery operation, the battery electronic expansion valve needs to be opened by the refrigerant side circulation loop, the refrigerant flowing into the indoor first heat exchanger flows into the battery cooler through the refrigerant shunting part, the heat of the cooling liquid of the battery loop is absorbed, the battery pack is cooled, and a refrigerating-plus-battery cooling mode is operated, so that the air-conditioning heat pump system can cool the passenger compartment and the power battery at the same time.

3) In the second cooling mode, if the temperature of the battery pack does not exceed the safe temperature range of the battery operation, the battery performs self-circulation without cooling. If the temperature of the battery pack exceeds the safe temperature range of battery operation, the refrigerant side circulation loop needs to open the battery electronic expansion valve, part of refrigerant which is shunted and flows into the indoor first heat exchanger flows into the battery cooler, absorbs the heat of the cooling liquid of the battery loop, cools the battery pack, and operates a refrigerating two + battery cooling mode.

4) When the new energy automobile is subjected to super fast charging, a super fast charging mode is operated, a water-cooled condenser and an outdoor heat exchanger are required to be opened to operate, the outdoor heat exchanger is used as a condenser, a compression electronic expansion valve, a high-pressure electromagnetic valve, a low-pressure electromagnetic valve and a refrigeration electronic expansion valve are closed, a heating electronic expansion valve is fully opened, and a battery electronic expansion valve is throttled.

5) When the ambient temperature is lower in winter, the passenger cabin heating mode is operated, the water-cooled condenser and the indoor second heat exchanger are connected in series for heat exchange, the outdoor heat exchanger is used as an evaporator, the compression electronic expansion valve, the high-pressure electromagnetic valve and the refrigeration electronic expansion valve are closed, the battery electronic expansion valve is closed, the low-pressure electromagnetic valve is opened, and the heating electronic expansion valve is used for throttling.

6) In the heating and battery heating mode, if the temperature of the battery pack is lower than the safe temperature range of battery operation, the second three-way valve (2) interface and the (3) interface are opened, the second electronic water pump pumps cooling liquid from the port A of the kettle, the cooling liquid flows into the battery pack for heating, then flows into the port a of the kettle through the second three-way valve, and the cooling liquid completes heat exchange of each loop in the kettle. If the temperature of the cooling liquid in the kettle is lower than the required temperature of the heating battery pack, the heater in the cooling liquid circulation loop of the passenger compartment can be turned on, the (3) th interface of the first three-way valve is turned on at the same time, the cooling liquid flows into the kettle through the port b of the kettle, reaches the required temperature of the heating battery pack through the cooling liquid in the heating kettle, and then flows into the battery circulation loop through the port A of the kettle.

7) In the process of operating the passenger compartment heating mode of the new energy automobile, when waste heat on the cooling liquid side can be recycled, the waste heat recycling heating mode is operated, the compression electronic expansion valve, the low-pressure solenoid valve, the refrigeration electronic expansion valve and the heating electronic expansion valve are closed, the high-pressure solenoid valve is opened, and the battery electronic expansion valve is throttled.

8) When the humidity in the passenger compartment is overhigh, the serial dehumidification mode and the parallel dehumidification mode are operated;

when the serial dehumidification mode is operated, the compression electronic expansion valve, the high-pressure solenoid valve, the low-pressure solenoid valve and the battery electronic expansion valve are closed in the refrigeration medium circulation loop, and the heating electronic expansion valve and the refrigeration electronic expansion valve are throttled. In a passenger compartment cooling liquid circulation loop, a first electronic water pump is started, and a first three-way valve port (2) and a first three-way valve port (1) are opened. In the motor cooling liquid circulation loop, a third electronic water pump is started, and a (2) th interface and a (3) rd interface of a third three-way valve are opened; in the battery pack cooling liquid circulation loop, the battery pack is self-circulated, the second electronic water pump is started, and the second port (2) and the first port (1) of the second three-way valve are opened.

When the parallel dehumidification mode is operated, the compression electronic expansion valve, the heating electronic expansion valve, the low-pressure electromagnetic valve are closed, the high-pressure electromagnetic valve is opened, and the refrigeration electronic expansion valve and the battery electronic expansion valve are throttled in the refrigeration medium circulation loop. In a passenger compartment cooling liquid circulation loop, a first electronic water pump is started, and a first three-way valve port (2) and a first three-way valve port (1) are opened. In the motor cooling liquid circulation loop, a third electronic water pump is started, and a (2) th interface and a (1) th interface of a third three-way valve are opened. In the battery cooling liquid circulation loop, a second electronic water pump is started, and a second (2) interface and a (3) interface of a second three-way valve are opened.

Particularly, the kettle, the first three-way valve, the second three-way valve and the third three-way valve are integrated or arranged into a whole.

Particularly, the inlets/outlets of the kettles are respectively provided with one water inlet/outlet, and the water inlets/outlets are simultaneously connected with a plurality of loop pipelines in parallel, or the water inlets/outlets can be shared by multiple loops through different internal flow passage structures.

In particular, a throttle valve is added in a compressor loop to realize the self-heating function of the compressor.

In particular, the outdoor heat exchanger and the heat radiation water tank are either of two separate structures or are integrated into a whole structure, and a fan is arranged.

In particular, the gas-liquid separator is of a sleeve type structure or a U-shaped tubular structure.

In particular, at low ambient temperatures, the compressor 8 is used to enhance heat transfer from the heating mode, eliminating the heater in the passenger compartment water circuit.

Particularly, the indoor first heat exchanger is an evaporator which is used as a cold source of a passenger compartment; the indoor second heat exchanger is used as a heat source of the passenger compartment. The air outlet of the blower on the air conditioning box is arranged in the passenger compartment. An air duct and an air door are arranged in the air-conditioning box.

The invention has the advantages and effects that: the system realizes various working modes including a refrigeration mode, a heating mode, a series/parallel dehumidification defrosting mode, a battery quick charge cooling mode, a battery heating mode, a low-temperature compressor self-heating mode, a waste heat recycling mode and the like. The refrigerant system has wide working condition application range, strong adaptability and complete functions, and can be matched with different refrigerant system architectures for use. The system heating operation temperature can be detected downwards, the power consumption of the whole vehicle is reduced, the energy consumption is reduced, the energy is saved, the energy utilization rate is improved, and the heat management requirements of the passenger compartment and the battery pack under different working conditions can be met.

Drawings

FIG. 1 is a schematic view of the connection structure of the present invention.

Fig. 2 is a schematic diagram of a cooling mode in embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of a second principle of the cooling mode in embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of a cooling-plus-battery cooling mode in embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of a cooling mode of the refrigerating two + battery in embodiment 1 of the present invention.

Fig. 6 is a schematic diagram of a principle of a super fast charging mode in embodiment 1 of the present invention.

Fig. 7 is a schematic view of a heating mode of the passenger compartment in embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of the heating mode + the battery heating mode in embodiment 1 of the present invention.

Fig. 9 is a schematic diagram of a principle of a waste heat recovery heating mode in embodiment 1 of the present invention.

Fig. 10 is a schematic view of the principle of the series dehumidification mode in embodiment 1 of the present invention.

Fig. 11 is a schematic diagram of a parallel dehumidification mode in embodiment 1 of the present invention.

Fig. 12 is a multi-operating-condition vehicle thermal management logic block diagram in embodiment 1 of the present invention.

The reference numerals include:

the system comprises a radiating water tank 1, an outdoor heat exchanger 2, a heating electronic expansion valve 3, a high-pressure electromagnetic valve 4, a low-pressure electromagnetic valve 5, a one-way valve 6, a gas-liquid separator 7, a compressor 8, a compression electronic expansion valve 9, an air-conditioning box 10, a water-cooling condenser 11, a refrigeration electronic expansion valve 12, a battery electronic expansion valve 13, a battery cooler 14, a battery pack 15, a heater 16, a kettle 17, a motor 18, a first three-way valve 19, a second three-way valve 20, a third three-way valve 21, a first electronic water pump 22, a second electronic water pump 23 and a third electronic water pump 24; a first temperature sensor 25, a second temperature sensor 26, a first temperature pressure sensor 27, a second temperature pressure sensor 28; indoor first heat exchanger 101, indoor second heat exchanger 102.

Detailed Description

The present invention includes a refrigerant circulation circuit and a coolant circulation circuit that perform heat exchange through the water-cooled condenser 11 and the battery cooler 14. Wherein:

the refrigerant circulation circuit mainly comprises a compressor 8, an air conditioning box 10, an outdoor heat exchanger 2, a gas-liquid separator 7 and valve elements, and all the components are connected through refrigerant pipelines. The valve parts in the refrigerant circulation circuit comprise throttle action parts such as an electronic expansion valve part, a breaking action electromagnetic valve part, a backflow prevention check valve and the like, and sensors for detecting the pressure and the temperature of the refrigerant. The air conditioning case 10 contains an indoor first heat exchanger 101 and an indoor second heat exchanger 102, and a blower fan.

The cooling liquid circulation loop comprises a battery loop, a motor loop and a passenger cabin loop; the water heater specifically comprises a kettle 17, a heat radiation water tank 1, a first three-way valve 19, a second three-way valve 20, a third three-way valve 21, a first electronic water pump 22, a second electronic water pump 23, a third electronic water pump 24, a battery pack 15, a motor 18 and a heater 16, wherein all the components are connected through water pipes.

The principle of the invention is as follows:

1) The heat exchange management of the circuits of the motor 18, the battery pack 15 and the passenger compartment is carried out through the kettle 17, and then the heat is distributed to the circuits for utilization.

2) A motor loop and a battery loop are arranged in the cooling liquid loop, and are connected in series and in parallel with the passenger compartment loop; the passenger cabin is heated by recycling the waste heat of the motor, the battery pack 15 is independently heated by the electric control waste heat of the motor 18, and the whole vehicle heat management under complex working conditions is realized by a plurality of working modes such as a refrigeration mode, a refrigeration and battery cooling mode, a super quick charging mode, a heating and battery heating mode, a waste heat recycling and heating mode, a series dehumidification mode and a parallel dehumidification mode with wide self-adaption covering functions.

3) The heat management system is additionally provided with a throttling valve in a loop of the compressor 8, so that the self-heating function of the compressor is realized, and the heating requirements of the passenger compartment in a low-temperature environment in winter and the heating requirements of the heat pump on the battery are met.

In the present invention, the kettle 17 serves to supply the cooling liquid to the circuits. The outlets/inlets of the kettle 17 are arranged in pairs, such as three pairs of outlets/inlets, and two inlets and two outlets or one inlet and one outlet can be designed according to the actual application requirements without limitation.

The invention is further illustrated by the following figures and examples.

Example 1: as shown in FIG. 1, the kettle 17 is illustrated with three A/B/C outlets and three a/B/C inlets.

The refrigerant circulation loop and the cooling liquid circulation loop are connected in a specific mode:

a refrigerant circulation circuit:

the exhaust port of the compressor 8 is branched into two paths, one path of the exhaust port of the compressor 8 is communicated with the inlet of the gas-liquid separator 7 through the compression electronic expansion valve 9, the outlet of the gas-liquid separator 7 is communicated with the air suction port of the compressor 8 to form a closed loop, and the exhaust and air supplement of the compressor can be utilized to heat the heat pump under the working condition of low ambient temperature; the other branch of the air outlet of the compressor 8 is communicated with a first inlet of a water-cooled condenser 11, the first outlet of the water-cooled condenser 11 is branched into two paths, and one path of the first outlet of the water-cooled condenser 11 is communicated with an inlet of an outdoor heat exchanger 2 through a heating electronic expansion valve 3; an outlet of the outdoor heat exchanger 2 is communicated with an inlet of a gas-liquid separator 7 or is communicated with an inlet of a compressor 8 through a low-pressure electromagnetic valve 5, and an outlet of the gas-liquid separator 7 is communicated with an air suction port of the compressor 8 to form a closed loop; an outlet of the outdoor heat exchanger 2 or another branch of a first outlet of the water-cooled condenser 11 is connected with the one-way valve 6 and then is converged with the high-pressure electromagnetic valve 4, and then branches into two paths, one path is communicated with an inlet of the indoor first heat exchanger 101 through the connection of the refrigeration electronic expansion valve 12 after being converged, the outdoor heat exchanger 2 is communicated with an inlet of the battery cooler 14 through the connection of the battery electronic expansion valve 13 through another branch of the one-way valve 6, an outlet of the battery cooler 14 is communicated with an inlet of the gas-liquid separator 7 after being converged with an outlet of the indoor first heat exchanger 101, and an outlet of the gas-liquid separator 7 is communicated with an air suction port of the compressor 8 to form a closed loop; under the working condition, the check valve 6, the refrigeration electronic expansion valve 12 and the battery electronic expansion valve 13 are connected in series after being connected in parallel; the high-pressure electromagnetic valve 4 is connected in parallel with the heating electronic expansion valve 3 and the one-way valve 6, and then connected in series with the refrigeration electronic expansion valve 12 and the battery electronic expansion valve 13.

A coolant circulation circuit:

the coolant circulation circuit is composed of three parts, namely a passenger compartment circuit, a battery circuit and a motor circuit. The cooling liquid circulation loop relates to a water path of a finished automobile heat management system, can meet the refrigerating and heating requirements of a battery, a motor and a passenger cabin in a matching manner, and realizes switching of various modes through inlet switching of a three-way valve and starting and stopping of a water pump. Wherein:

the connection mode of the passenger compartment loop part comprises the following steps: an outlet B of the kettle 17 is communicated with an inlet of a first electronic water pump 22, an outlet of the first electronic water pump 22 is communicated with an inlet of an indoor second heat exchanger 102, an outlet of the indoor second heat exchanger 102 is communicated with a second inlet of a water-cooled condenser 11, a second outlet of the water-cooled condenser 11 is communicated with an inlet of a heater 16, an outlet of the heater 16 is communicated with a port (2) of a first three-way valve 19, a port (3) of the first three-way valve 19 is communicated with an inlet B of the kettle 17, and a port (1) of the first three-way valve 19 is communicated with an inlet of the first electronic water pump 22. The passenger compartment loop can realize independent circulation or mixed circulation through the opening and closing position of the regulating valve, and the opening of the regulating valve can realize the size and distribution of water flow. If the passenger compartment circuit is in the independent circulation mode without heat exchange, the port (3) of the first three-way valve 19 is closed and the port (1) of the first three-way valve 19 is opened. If the passenger compartment loop needs to absorb or dissipate heat through the kettle 17 for heat exchange, the port (3) of the first three-way valve 19 is opened, and the port (1) of the first three-way valve 19 is closed.

The connection mode of the battery loop part is as follows: an outlet A of the kettle 17 is communicated with an inlet of a second electronic water pump 23, an outlet of the second electronic water pump 23 is communicated with an inlet of a battery cooler 14, an outlet of the battery cooler 14 is communicated with an inlet of a battery pack 15, an outlet of the battery pack 15 is communicated with a port (2) of a second three-way valve 20, a port (3) of the second three-way valve 20 is communicated with an inlet a of the kettle 17, and a port (1) of the second three-way valve 20 is communicated with an inlet of the second electronic water pump 23. The battery loop realizes independent circulation or mixed circulation by regulating and controlling the opening and closing positions of the valves. If the battery circuit does not exchange heat or the refrigerant circuit cools the battery pack, the independent circulation mode is set, the port (3) of the second three-way valve is closed, and the port (1) of the second three-way valve is opened. If the battery loop needs to absorb or dissipate heat through the kettle 17 for heat exchange, the opening (3) of the second three-way valve 20 is opened, and the opening (1) of the second three-way valve 20 is closed.

The motor loop connection mode is as follows: an outlet C of the kettle 17 is communicated with an inlet of a third electronic water pump 24, an outlet of the third electronic water pump 24 is communicated with an inlet of a motor 18, an outlet of the motor 18 is communicated with a port (2) of a third three-way valve 21, a port (3) of the third three-way valve 21 is communicated with an inlet of a heat dissipation water tank 1, and an outlet of the heat dissipation water tank 1 and a port (1) of the third three-way valve 21 are converged and communicated with the inlet C of the kettle 17. The motor loop realizes heat dissipation circulation or independent circulation through the heat dissipation water tank 1 by regulating and controlling the on-off position of the valve.

Among the foregoing, outdoor heat exchanger 2 and heat dissipation water tank 1 detachable are independent two products, also can be integrated into an organic whole with outdoor heat exchanger 2 and heat dissipation water tank 1 to set up the fan, can induced draft or blow.

In the foregoing, the electronic expansion valves include, but are not limited to, a heating electronic expansion valve 3, a high-pressure solenoid valve 4, a low-pressure solenoid valve 5, a check valve 6, a compression electronic expansion valve 9, a refrigeration electronic expansion valve 12, a battery electronic expansion valve 13, a first three-way valve 19, a second three-way valve 20, a third three-way valve 21, a first temperature sensor 25, a second temperature sensor 26, a first temperature pressure sensor 27, and a second temperature pressure sensor 28; wherein:

the heating electronic expansion valve 3 is arranged in front of the inlet of the outdoor heat exchanger 2, the refrigerating electronic expansion valve 12 is arranged in front of the inlet of the indoor first heat exchanger 101, the battery electronic expansion valve 13 is arranged in front of the inlet of the battery cooler 14, and the compression electronic expansion valve 9 is arranged between the outlet of the compressor 8 and the inlet of the gas-liquid separator 7; the high-pressure electromagnetic valve 4 is arranged between the outlet of the water-cooled condenser 11 and the intersection of the refrigeration electronic expansion valve 12 and the battery electronic expansion valve 13, the low-pressure electromagnetic valve 5 is arranged between the outlet of the outdoor heat exchanger 2 and the inlet of the gas-liquid separator 7, and the electromagnetic valve components play a role in control execution when the thermal management system is switched into a mode.

The one-way valve 6 is arranged between the outlet of the outdoor heat exchanger 2 and the intersection of the refrigeration electronic expansion valve 12 and the battery electronic expansion valve 13, and plays a role in one-way circulation of the refrigerant.

A first temperature sensor 25 is arranged at the discharge port of the compressor 8, a second temperature sensor 26 is arranged at the outlet of the outdoor heat exchanger 2, a first temperature pressure sensor 27 is arranged at the outlet of the water-cooled condenser 11, and a second temperature pressure sensor 28 is arranged at the inlet of the gas-liquid separator 7.

In the foregoing, the gas-liquid separator 7 is a sleeve type or U-shaped tube type, and the structure is not limited, and mainly plays roles of separating liquid refrigerant from gaseous refrigerant, returning oil, drying, and the like, and can prevent oil shortage and wet compression of the compressor.

In the foregoing, the indoor first heat exchanger 101 is an evaporator, and is used as a cold source of the passenger compartment; the indoor second heat exchanger 102 serves as a heat source for the passenger compartment. The blower outlet on the air conditioning box 10 is mounted in the passenger compartment. An air duct and an air door are arranged in the air conditioning box 10, and hot air or cold air blown out to the passenger compartment by the indoor first heat exchanger 101 and the indoor second heat exchanger 102 is realized through switching of the air door, so that the requirement of comfort of people is met.

In the embodiment of the present invention, the compressor 8 may be one of electric compressors.

In the embodiment of the invention, the kettle 17 is used as a heat exchanger for each small-circulation mixed water in the cooling liquid circulation loop, and the internal flow passage of the kettle 17 can ensure that water can be fully thermally mixed after entering the kettle 17. The inlet of the kettle 17 is generally arranged at a high position, the outlet of the kettle 17 is generally arranged at a low position of the kettle, and the circulating water enters the kettle 17 through the circulating water path, is fully mixed and exchanges heat, and then flows out to enter each circulating loop.

In the embodiment of the invention, three pairs of inlets/outlets of the kettle 17 which are respectively suitable for being communicated and connected with the motor 18, the battery pack 15 and the circulating pipeline of the passenger compartment are arranged, and in fact, the expansion kettles of the motor 18, the battery pack 15 and the passenger compartment are integrally designed to be an expansion kettle assembly, so that the number of parts is reduced, and the cost can be reduced.

In the embodiment of the present invention, the first three-way valve 19, the second three-way valve 20, and the third three-way valve 21 are of a one-inlet-two-outlet type structure, and as shown in the figure, they are (2) inlet, and (1) outlet, and (3) outlet.

In the embodiment of the invention, the compressor 8 can be used for self-heating mode enhanced heat exchange at low ambient temperature, and the heater 16 in the passenger compartment waterway loop can be eliminated.

In the embodiments of the present invention, the following describes different operation modes and operation principles in different operation modes with reference to the drawings.

1) The management method is shown in fig. 12, and specifically includes:

when the ambient temperature is high in summer, the refrigerating mode is operated in the passenger compartment. The whole vehicle heat management system has two refrigeration modes, when the temperature in the passenger compartment is higher, namely higher than or equal to 35 ℃, and the temperature needs to be quickly reduced, the whole vehicle heat management system can be switched to a first refrigeration mode, as shown in fig. 2, a water-cooled condenser 11 and an outdoor heat exchanger 2 need to be opened to operate, the outdoor heat exchanger 2 is used as a condenser, a compression electronic expansion valve 9, a high-pressure electromagnetic valve 4, a low-pressure electromagnetic valve 5 and a battery electronic expansion valve 13 are closed, a heating electronic expansion valve 3 is fully opened, and the refrigeration electronic expansion valve 12 is throttled. When the temperature in the passenger cabin, namely, the temperature is less than 35 ℃ and quick cooling or the temperature in the passenger cabin does not need to be maintained, the second refrigeration mode can be switched, as shown in fig. 3, the outdoor heat exchanger 2 is only required to be opened to be used as a condenser, the compression electronic expansion valve 9, the high-pressure electromagnetic valve 4, the low-pressure electromagnetic valve 5 and the battery electronic expansion valve 13 are closed, the heating electronic expansion valve 3 is opened, and the refrigeration electronic expansion valve 12 is throttled.

In the first cooling mode, as shown by the solid line in fig. 2, the compressor 8 compresses the low-temperature and low-pressure gas refrigerant into the high-temperature and high-pressure gas refrigerant, and then flows into the water-cooled condenser 11 to release heat, and the released heat is released into the coolant in the passenger compartment, and the two heat exchanges, so that the high-temperature and high-pressure gas refrigerant is cooled to a gas-liquid mixture. After the gas-liquid mixed refrigerant flows out of the water-cooled condenser 11, the high-pressure electromagnetic valve 4 is in a closed state, and the heating electronic expansion valve 3 is opened, at this time, the refrigerant flows into the outdoor heat exchanger 2 through the heating electronic expansion valve 3 to release heat for condensation again, and the released heat is released into the air. Then flows into the refrigeration electronic expansion valve 12 through the one-way valve 6 to be throttled, cooled and depressurized, and then enters the indoor first heat exchanger 101, at the moment, the low-temperature and low-pressure gas-liquid mixed refrigerant absorbs heat in air flow in the indoor first heat exchanger 101 to be evaporated into a gaseous state, and the cooled air flows into the passenger compartment to be cooled. The refrigerant flowing out of the indoor first heat exchanger 101 enters a gas-liquid separator for gas-liquid separation, after drying, the liquid refrigerant is left at the bottom of the gas-liquid separator 7, the gaseous refrigerant is sucked by the compressor 8 and compressed into the high-temperature and high-pressure gaseous refrigerant, and the reciprocating circulation is carried out, so that the passenger compartment refrigeration mode is completed. In the mode, the water-cooled condenser 11 and the outdoor heat exchanger 2 are used as condensers, so that the heat exchange capacity of the system is enhanced.

If the battery pack 15 temperature does not exceed the safe temperature range for battery operation, the battery pack 15 self-circulates without cooling. If the temperature of the battery pack 15 exceeds the safe temperature range for battery operation, the electronic battery expansion valve 13 needs to be opened in the refrigerant side circulation loop, the refrigerant shunting part flowing into the indoor first heat exchanger 101 flows into the battery cooler 14 to absorb the heat of the battery loop cooling liquid, and then the battery pack 15 is cooled, and a cooling-battery cooling mode is operated as shown in fig. 4, and the cooling-battery cooling mode can realize the cooling of the passenger compartment and the power battery by the air-conditioning heat pump system at the same time. In the motor circulation loop, because the ambient temperature is higher, the heat recovery of the passenger compartment cooling liquid circulation loop and the motor cooling liquid circulation loop is not needed, the heat dissipated by the refrigerant into the cooling liquid flows into the kettle 17 through circulation to exchange heat with the cooling liquid of the motor loop, then the heat flows into the heat dissipation water tank 1 through the motor loop to be dissipated into the air, and meanwhile, the heat generated by the motor 18 in the running process is also dissipated through the heat dissipation water tank 1.

In the second cooling mode, as shown by the thick solid line in fig. 3, the passenger compartment coolant circulation circuit water pump is not turned on, that is, the coolant does not flow, the water-cooled condenser 11 does not dissipate heat, only the outdoor heat exchanger 2 does the condenser to release heat, the indoor first heat exchanger 101 does the evaporator to absorb heat to cool the passenger compartment, and the remaining principle of the refrigerant circulation circuit, that is, the refrigerant flow path, is consistent with the first cooling mode.

In the cooling mode two, if the temperature of the battery pack 15 does not exceed the safe temperature range for battery operation, the battery performs self-circulation without cooling. If the temperature of the battery pack 15 exceeds the safe temperature range for battery operation, the battery electronic expansion valve 13 needs to be opened in the refrigerant-side circulation loop, part of the refrigerant which is shunted to flow into the indoor first heat exchanger 101 flows into the battery cooler 14, the heat of the battery loop cooling liquid is absorbed, and the battery pack 15 is cooled, and a cooling two + battery cooling mode is operated as shown in fig. 5, wherein the cooling two + battery cooling mode can realize that the air-conditioning heat pump system simultaneously cools the passenger compartment and the power battery. In the motor circulation loop, because the ambient temperature is higher, the motor cooling liquid circulation loop does not need heat recovery and utilization, and the heat flows into the heat dissipation water tank 1 through the motor loop and is released into the air.

When the new energy automobile is subjected to super fast charging, the operation is in a super fast charging mode as shown in fig. 6, the water-cooled condenser 11 and the outdoor heat exchanger 2 need to be opened for operation, the outdoor heat exchanger 2 is used as a condenser, the compression electronic expansion valve 9, the high-pressure electromagnetic valve 4, the low-pressure electromagnetic valve 5 and the refrigeration electronic expansion valve 12 are closed, the heating electronic expansion valve 3 is fully opened, and the battery electronic expansion valve 13 is throttled. The compressor 8 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and then flows into the water-cooled condenser 11 to release heat, the released heat is released into the cooling liquid in the passenger compartment, the two are subjected to heat exchange, and the high-temperature and high-pressure gaseous refrigerant is cooled into a gas-liquid mixed state. After the gas-liquid mixed refrigerant flows out of the water-cooled condenser 11, the high-pressure electromagnetic valve 4 is in a closed state, and the heating electronic expansion valve 3 is opened, at this time, the refrigerant flows into the outdoor heat exchanger 2 through the heating electronic expansion valve 3 to release heat for condensation again, and the released heat is released into the air. Then, the gas flows into a battery electronic expansion valve 13 through a one-way valve 6 for throttling, temperature reduction and pressure reduction, and then enters a battery cooler 14 for absorbing the heat of a battery loop cooling liquid, so that the battery pack 15 is cooled. And the refrigerant flowing out of the battery cooler 14 enters the gas-liquid separator 7 for gas-liquid separation, after drying, the liquid refrigerant is left at the bottom of the gas-liquid separator 7, the gaseous refrigerant is sucked by the compressor 8 and compressed into the high-temperature and high-pressure gaseous refrigerant, and the above steps are repeated to complete the super quick battery charging mode. In the mode, the water-cooled condenser 11 and the outdoor heat exchanger 2 are used as condensers, so that the heat exchange capacity of the system condensation is enhanced.

In the super fast charge mode, the second electronic water pump 23 is turned on, the (2) port and the (1) port of the second three-way valve 20 are turned on, and the coolant flowing out from the second electronic water pump 23 flows into the battery cooler 14 to exchange heat with the refrigerant, and then flows out to the battery pack 15 to take heat away to cool the battery pack 15. In the passenger compartment circulation loop, the first electronic water pump 22 is turned on, the cooling liquid flows into the water-cooled condenser 11 to exchange heat with the refrigerant, then flows out of the kettle 17 to exchange heat with cold water in a mixed manner, and flows out of the C port of the kettle 17 to the motor circulation loop, at the moment, the motor 18 does not operate, no heat is generated, the cooling liquid flows into the radiating water tank 1 through the third three-way valve 21, and the heat is released to the air, so that the radiating circulation of the cooling liquid is completed.

In winter when the ambient temperature is low, the passenger compartment heating mode is operated, as shown in fig. 7. The water-cooled condenser 11 and the indoor second heat exchanger 102 are connected in series for heat exchange, the outdoor heat exchanger 2 is used as an evaporator, the compression electronic expansion valve 9, the high-pressure electromagnetic valve 4, the refrigeration electronic expansion valve 12, the battery electronic expansion valve 13 are closed, the low-pressure electromagnetic valve 5 is opened, and the heating electronic expansion valve 3 is throttled. The compressor 8 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant flows into the water-cooled condenser 11 to release heat, the released heat is released into the cooling liquid in the passenger compartment, the cooling liquid exchanges heat in the indoor second heat exchanger 102 to heat the ventilation air of the indoor second heat exchanger 102, and the high-temperature and high-pressure gaseous refrigerant is condensed into a liquid state. After the refrigerant flows out of the water-cooled condenser 11, the high-pressure solenoid valve 4 is closed, and the heating electronic expansion valve 3 is opened, so that the refrigerant is throttled and depressurized by the heating electronic expansion valve 3 and flows into the outdoor heat exchanger 2 to be evaporated and absorb heat. Then, the refrigerant enters a gas-liquid separator 7 through a low-pressure electromagnetic valve 5 for gas-liquid separation, after drying, the liquid refrigerant is left at the bottom of the gas-liquid separator 7, the gaseous refrigerant is sucked by a compressor 8 and compressed into the high-temperature high-pressure gaseous refrigerant, and the circulation is repeated in this way to complete heating of the passenger compartment.

In the passenger compartment coolant circulation loop, the first electronic water pump 22 is turned on, and the (2) th port and the (1) th port of the first three-way valve 19 are opened. The cooling liquid flows into the indoor second heat exchanger 102 from the first electronic water pump 22 to release heat, air blown into the passenger compartment by a blower in the air conditioning box 10 is heated to heat the passenger compartment, and the cooled cooling liquid flows into the water-cooled condenser 11 to exchange heat with the refrigerant and then flows into the first electronic water pump 22 through the (2) interface and the (1) interface of the first three-way valve 19. In the cooling liquid circulation loop of the motor 18, the third electronic water pump 24 is started, the (2) th port and the (1) th port of the third three-way valve 21 are opened, the cooling liquid of the third electronic water pump 21 flows into the motor 18 from the port C of the kettle 17 to absorb heat, then flows into the port C of the kettle 17 through the (2) th port and the (1) th port of the third three-way valve 21, and the cooling liquid completes heat exchange of all loops in the kettle 17. In the battery coolant circulation loop, the second electronic water pump 23 is turned on, if the battery temperature does not exceed the safe temperature range for the operation of the battery pack 15, the battery performs self-circulation without heating and cooling, and at this time, the (1) th port and the (2) th port of the second three-way valve 20 are opened.

If the temperature of the battery pack 15 is lower than the safe temperature range of battery operation, the (2) th interface and the (3) th interface of the second three-way valve 20 are opened, the second electronic water pump 23 pumps cooling liquid from the port A of the kettle 17, the cooling liquid flows into the battery pack 15 for heating, then the cooling liquid flows into the port a of the kettle 17 through the second three-way valve 20, and the cooling liquid completes heat exchange of all loops in the kettle 17. The cooling liquid for heating the battery pack 15 absorbs the heat of the motor 18 or the heat pump, and indirectly transfers the heat of the motor 18 or the heat pump to the battery cooling liquid circulation loop, so that the battery pack 15 can be heated and flows into the battery pack 15 for heating. Or, if the temperature of the cooling liquid in the kettle 17 is lower than the required temperature of the heating battery pack 15, the heater 16 in the cooling liquid circulation loop of the passenger compartment may be turned on, and at the same time, the (3) th port of the first three-way valve 19 is turned on, the cooling liquid in the heating kettle 17 flows into the kettle 17 through the port b of the kettle 17, and the cooling liquid in the heating kettle 17 reaches the required temperature of the heating battery pack 15 and flows into the battery circulation loop through the port a of the kettle 17, and in this condition, the specific circulation flow path is shown in the heating + battery heating mode shown in fig. 8.

In the process of operating the passenger compartment heating mode of the new energy automobile, when waste heat on the cooling liquid side can be recycled, the waste heat recycling heating mode shown in fig. 9 is operated, the compression electronic expansion valve 9, the low-pressure electromagnetic valve 5, the refrigeration electronic expansion valve 12 and the heating electronic expansion valve 3 are closed, the high-pressure electromagnetic valve 4 is opened, and the battery electronic expansion valve 13 is throttled. The compressor 8 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and then flows into the water-cooled condenser 11 to release heat, the released heat is released into the coolant in the passenger compartment, the coolant exchanges heat in the indoor second heat exchanger 102 to heat the air flowing through the indoor second heat exchanger 102, and the high-temperature and high-pressure gaseous refrigerant is condensed into a liquid state. After the refrigerant flows out of the water-cooled condenser 11, because the heating electronic expansion valve 3 is in a closed state, and the high-pressure electromagnetic valve 4 is opened, at the moment, the refrigerant flows through the high-pressure electromagnetic valve 4, is throttled and decompressed by the battery electronic expansion valve 13, flows into the battery cooler 14 to evaporate and absorb heat on the cooling liquid side, finally enters the gas-liquid separator 7 to perform gas-liquid separation and drying, the liquid refrigerant is left at the bottom of the gas-liquid separator 7, the gaseous refrigerant is sucked by the compressor 8 and is compressed into high-temperature and high-pressure gaseous refrigerant, and the reciprocating circulation is performed, so that the passenger cabin waste heat recovery heating mode is completed. In the passenger compartment coolant circulation circuit, the first electronic water pump 22 is turned on, and the (2) th port and the (1) th port of the first three-way valve 19 are opened. The cooling liquid flows into the indoor second heat exchanger 102 from the first electronic water pump 22 to release heat, a blower of the heating air-conditioning box 10 blows air into the passenger compartment to heat the passenger compartment, and the cooled cooling liquid flows into the water-cooled condenser 11 to exchange heat with the refrigerant and then flows into the first electronic water pump through the (2) interface and the (1) interface of the first three-way valve. In the motor cooling liquid circulation loop, the third electronic water pump is started, the (2) interface and the (1) interface of the third three-way valve 19 are opened, the third electronic water pump 24 pumps cooling liquid from the C port of the kettle 17 to flow into the motor 18 to absorb heat, then the cooling liquid flows into the C port of the kettle 17 through the (2) interface and the (1) interface of the third three-way valve 21, and the cooling liquid completes heat exchange of all loops in the kettle 17. In the battery cooling liquid circulation loop, the second electronic water pump 23 is started, the (2) th interface and the (3) th interface of the second three-way valve 20 are opened, the second electronic water pump 23 pumps the cooling liquid from the A port of the kettle 17, the cooling liquid flows into the battery pack 15 and then flows into the a port of the kettle 17 through the second three-way valve 20, and the cooling liquid completes heat exchange of all loops in the kettle 17. The coolant flowing through the battery cooler 14 absorbs heat from the motor 18 and the battery pack 15.

When the humidity in the passenger compartment is too high, the dehumidification mode is operated. The dehumidification temperature range of the heat pump air conditioning system can be expanded by a series dehumidification mode and a parallel dehumidification mode.

In the series dehumidification mode shown in fig. 10, in the refrigerant circulation circuit, the compression electronic expansion valve 9, the high-pressure solenoid valve 4, the low-pressure solenoid valve 5, and the battery electronic expansion valve 13 are closed, and the heating electronic expansion valve 3 and the cooling electronic expansion valve 12 are throttled. The compressor 8 compresses low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, then the high-temperature high-pressure gaseous refrigerant flows into the water-cooled condenser 11 to release heat, the released heat is released into cooling liquid of the passenger compartment, the cooling liquid exchanges heat in the indoor second heat exchanger 101 to heat air circulating through the indoor second heat exchanger, the high-temperature high-pressure gaseous refrigerant is condensed into liquid, the high-pressure electromagnetic valve 4 is in a closed state after flowing out of the water-cooled condenser 11, the heating electronic expansion valve 3 is opened and throttled, the outdoor heat exchanger 2 can be used as an evaporator or a condenser according to different environmental temperatures, the refrigerant passes through the one-way valve 6 after exchanging heat in the outdoor heat exchanger 2, the cooling electronic expansion valve 12 throttles and reduces the pressure again and flows into the indoor first heat exchanger 101, the refrigerant exchanges heat with air with higher humidity sucked into the air conditioning box 10 from the passenger compartment, the humid air is condensed and reduced in humidity on the surface of the indoor first heat exchanger 101 and then flows into the indoor second heat exchanger 102 to increase the temperature, and the cycle is carried out, and dehumidification of the passenger compartment is realized.

In the passenger compartment cooling liquid circulation loop, the first electronic water pump 22 is started, and the (2) th port and the (1) th port of the first three-way valve 19 are opened. The cooling liquid flows into the indoor second heat exchanger 102 from the first electronic water pump 22 to release heat, a blower of the heating air-conditioning box 10 blows air into the passenger compartment to heat the passenger compartment, and the cooling liquid with the temperature reduced flows into the water-cooled condenser 11 to exchange heat with the refrigerant and then flows into the first electronic water pump 22 through the (2) interface and the (1) interface of the first three-way valve 19. In the cooling liquid circulation loop of the motor 18, the third electronic water pump 24 is started, the (2) th port and the (3) th port of the third three-way valve 21 are opened, the cooling liquid of the third electronic water pump 24 flows into the motor 18 from the port C of the kettle 17 to absorb heat, then flows into the radiator of the motor 18 through the (2) th port and the (3) th port of the third three-way valve 21 to exchange heat, and then flows into the port C of the kettle 17, and the cooling liquid completes heat exchange of each loop in the kettle 17. In the cooling liquid circulation loop of the battery pack 15, the battery pack 15 can self-circulate, the second electronic water pump 23 is started, and the (2) th port and the (1) th port of the second three-way valve 20 are opened.

In the parallel dehumidification mode operation shown in fig. 11, in the refrigerant circulation loop, the compression electronic expansion valve 9, the heating electronic expansion valve 3, the low-pressure solenoid valve 5 are closed, the high-pressure solenoid valve 4 is opened, and the refrigeration electronic expansion valve 12 and the battery electronic expansion valve 13 are throttled. The compressor 8 compresses low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, then the high-temperature high-pressure gaseous refrigerant flows into the water-cooled condenser 11 to release heat, the released heat is released into cooling liquid in the passenger compartment, the cooling liquid exchanges heat in the indoor second heat exchanger 102 to heat air circulating through the indoor second heat exchanger 102, the high-temperature high-pressure gaseous refrigerant is condensed into liquid, the liquid flows out of the water-cooled condenser 11 and branches into two paths through the high-pressure electromagnetic valve 4, and one path of refrigerant is throttled and reduced in pressure through the battery electronic expansion valve 13 and then flows into the battery cooler 14 to absorb heat on the side of the cooling liquid. The other path of refrigerant flows into the indoor first heat exchanger 101 after being throttled and depressurized by the refrigeration electronic expansion valve 12, exchanges heat with air with higher humidity sucked into the air conditioning box 10 from the passenger compartment, and the humid air is condensed and dehumidified on the surface of the indoor first heat exchanger 101 and then flows to the indoor second heat exchanger 102 for heating, and the circulation is carried out, so that the dehumidification of the passenger compartment is realized.

In the passenger compartment coolant circulation loop, the first electronic water pump 22 is turned on, and the (2) th port and the (1) th port of the first three-way valve 19 are opened. The cooling liquid flows into the indoor second heat exchanger 102 from the first electronic water pump 22 to release heat, a blower of the heating air-conditioning box 10 blows air into the passenger compartment to heat the passenger compartment, and the cooled cooling liquid flows into the water-cooled condenser 11 to exchange heat with the refrigerant and then flows into the first electronic water pump 22 through the (2) interface and the (1) interface of the first three-way valve 19. In the motor coolant circulation circuit, the third electronic water pump 24 is turned on, the (2) th port and the (1) th port of the third three-way valve 21 are opened, and the third electronic water pump 24 pumps coolant from the port C of the kettle 17 to flow into the motor 18 to absorb heat, and then flows into the port C of the kettle 17 through the (2) th port and the (1) th port of the third three-way valve 21. In the battery coolant circulation circuit, the second electronic pump 23 is turned on, the second three-way valve 20 opens the (2) port and the (3) port, and the second electronic pump 23 pumps the coolant from the port a of the kettle 17, flows into the battery pack 15, and then flows into the port a of the kettle 17 through the second three-way valve 20. The cooling liquid completes the heat exchange of each loop in the kettle 17. The coolant flowing through the battery cooler 14 absorbs heat from the motor 18 and the battery pack 15.

In the present invention, if the components in the circulation loop in the present application are replaced, the water-cooled condenser 11 or the heater 16 of the warm air core loop is simply removed according to the requirement, or other heat exchangers or other components are added according to the requirement, and the derivative technical solution without changing the system frame and the switching mode is still within the protection scope of the present invention.

The motor and the battery related in the invention refer to a vehicle-mounted motor and a battery module in a broad sense, and if ambiguity is caused by name calling, the motor and the battery are still within the protection scope of the invention.

The warm air core loop of the air conditioning box 10 in the present invention can be replaced by other application loops according to actual requirements, for example, if the warm air core is not laid in the actual system for heating the passenger compartment and some electronic component has a heating requirement, the warm air core in the warm air core loop can be replaced by a heat exchanger for heating the electronic component at this time, but the system frame of the present invention is not changed, and the same shall be within the protection scope of the present invention, and similarly, the equivalent replacement of the motor and the battery loop is also the same.

The above valve elements, temperature and temperature pressure sensors are only described as examples, and it is within the scope of the claims to change the number and position and to replace them with parts that perform the same function.

It should be noted that in the present invention, the possibility of integrating the water bottle 17, the first three-way valve 19, the second three-way valve 20 and the third three-way valve 21 is included. Alternatively, one inlet/outlet of the kettle 17 is provided; the method has more practical application value in partial application scenes. In addition, first three-way valve 19, second three-way valve 20 and third three-way valve 21 also can design as the integrated water valve, can improve the whole arrangement nature of waterway part, reduce cost, and this integrated arrangement is also in this application's scope of protection.

Claims

1. The multi-working-condition finished automobile thermal management system and method for the new energy electric automobile are characterized by comprising a refrigerant circulation loop and a cooling liquid circulation loop, wherein the refrigerant circulation loop and the cooling liquid circulation loop exchange heat through a water-cooled condenser (11) and a battery cooler (14); heat exchange management of each loop of the motor (18), the battery pack (15) and the passenger compartment is carried out through the kettle (17), and then the heat exchange management is redistributed to each loop for utilization; wherein: the refrigerant circulation loop mainly comprises a compressor (8), an air conditioning box (10), an outdoor heat exchanger (2), a gas-liquid separator (7) and a valve, wherein the air conditioning box (10) contains an indoor first heat exchanger (101), an indoor second heat exchanger (102) and a blower; all the parts are connected through refrigerant pipelines; the cooling liquid circulation loop comprises a battery loop, a motor loop and a passenger cabin loop; the water heater specifically comprises a kettle (17), a heat radiation water tank (1), a three-way valve, an electronic water pump, a battery pack (15), a motor (18) and a heater (16), wherein all the parts are connected through water pipes; the multi-working-condition operation modes of the refrigerant circulation loop and the cooling liquid circulation loop for heat exchange redistribution comprise a refrigeration mode, a refrigeration + battery cooling mode, a super quick charge mode, a passenger compartment heating mode, a heating + battery heating mode, a waste heat recovery heating mode and a serial/parallel dehumidification mode; the logic for operating the whole vehicle heat management in each working condition mode comprises the following steps:

2) When the ambient temperature in summer is high and the temperature in the passenger cabin is less than 35 ℃, the rapid cooling is not needed or the temperature in the passenger cabin is not needed to be maintained, the second refrigeration mode can be switched; further, if the temperature of the battery pack (15) exceeds the safe temperature range of battery operation, a refrigerating two + battery cooling mode is operated;

3) When the new energy automobile is subjected to super fast charging, a super fast charging mode is operated;

5) If the battery pack (15) operates below a safe temperature range, or if the temperature of cooling liquid in the kettle (17) is lower than the required temperature for heating the battery pack (15), operating a heating mode and a battery heating mode;

2. The system and the method for multi-working-condition overall vehicle thermal management of the new energy electric vehicle as claimed in claim 1, wherein a motor loop and a battery loop are arranged in the cooling liquid loop, and the motor loop and the battery loop are connected in series and in parallel through a passenger compartment loop; the passenger compartment is heated by recycling the waste heat of the motor, or the battery pack (15) is independently heated by the electric control waste heat of the motor (18).

3. The system and the method for managing the heat of the new energy electric vehicle under the multiple working conditions as claimed in claim 1, wherein as an integrated design expansion water tank assembly structure, a kettle (17) is provided with three pairs of inlets/outlets respectively adapted to be connected with a motor (18), a battery pack (15) and a passenger compartment circulating pipeline in a conduction manner; a first three-way valve (19), a second three-way valve (20) and a third three-way valve (21) which are arranged on corresponding pipelines are all of a one-inlet two-outlet type structure, namely (2) inlet and (1) outlet and (3) outlet; the electronic expansion valve comprises a heating electronic expansion valve (3), a high-pressure electromagnetic valve (4), a low-pressure electromagnetic valve (5), a one-way valve (6), a compression electronic expansion valve (9), a refrigeration electronic expansion valve (12), a battery electronic expansion valve (13), a first three-way valve (19), a second three-way valve (20), a third three-way valve (21), a first temperature sensor (25), a second temperature sensor (26), a first temperature pressure sensor (27) and a second temperature pressure sensor (28); wherein: the heating electronic expansion valve (3) is arranged in front of an inlet of the outdoor heat exchanger (2), the refrigerating electronic expansion valve (12) is arranged in front of an inlet of the indoor first heat exchanger (101), the battery electronic expansion valve (13) is arranged in front of an inlet of the battery cooler (14), and the compression electronic expansion valve (9) is arranged between an outlet of the compressor (8) and an inlet of the gas-liquid separator (7); the high-pressure electromagnetic valve (4) is arranged between the outlet of the water-cooled condenser (11) and the intersection of the refrigeration electronic expansion valve (12) and the battery electronic expansion valve (13), the low-pressure electromagnetic valve (5) is arranged between the outlet of the outdoor heat exchanger (2) and the inlet of the gas-liquid separator (7), the one-way valve (6) is arranged between the outlet of the outdoor heat exchanger (2) and the intersection of the refrigeration electronic expansion valve (12) and the battery electronic expansion valve (13), the first temperature sensor (25) is arranged at the exhaust port of the compressor (8), the second temperature sensor (26) is arranged at the outlet of the outdoor heat exchanger (2), the first temperature pressure sensor (27) is arranged at the outlet of the water-cooled condenser (11), and the second temperature pressure sensor (28) is arranged at the inlet of the gas-liquid separator (7); the specific connection mode of the refrigerant circulation loop and the cooling liquid circulation loop comprises the following steps:

a refrigerant circulation circuit:

the exhaust port of the compressor (8) is branched into two paths, one path of the exhaust port of the compressor (8) is communicated with the inlet of the gas-liquid separator (7) through a compression electronic expansion valve (9), the outlet of the gas-liquid separator (7) is communicated with the air suction port of the compressor (8) to form a closed loop, and the exhaust and air supplement of the compressor can be utilized to heat the heat pump under the working condition of low ambient temperature; the other branch of the air outlet of the compressor (8) is communicated with a first inlet of a water-cooled condenser (11), a first outlet of the water-cooled condenser (11) is branched into two paths, and one path of the first outlet of the water-cooled condenser (11) is communicated with an inlet of an outdoor heat exchanger (2) through a heating electronic expansion valve (3); an outlet of the outdoor heat exchanger (2) is communicated with an inlet of the gas-liquid separator (7) or is communicated with an inlet of the compressor (8) through a low-pressure electromagnetic valve (5), and an outlet of the gas-liquid separator (7) is communicated with an air suction port of the compressor (8) to form a closed loop; an outlet of the outdoor heat exchanger (2) or another branch of a first outlet of the water-cooled condenser (11) is connected with the high-pressure electromagnetic valve (4) through a connecting one-way valve (6) and then converged, and then branches into two paths, wherein one path is communicated with an inlet of the indoor first heat exchanger (101) through a connecting refrigeration electronic expansion valve (12), the outdoor heat exchanger (2) is communicated with an inlet of a battery cooler (14) through another branch of the one-way valve (6) through a connecting battery electronic expansion valve (13), an outlet of the battery cooler (14) is communicated with an inlet of a gas-liquid separator (7) after being converged with an outlet of the indoor first heat exchanger (101), and an outlet of the gas-liquid separator (7) is communicated with an air suction port of a compressor (8) to form a closed loop; under the working condition, the one-way valve (6), the refrigeration electronic expansion valve (12) and the battery electronic expansion valve (13) are connected in series after being connected in parallel; the high-pressure electromagnetic valve (4) is connected with the heating electronic expansion valve (3) and the one-way valve (6) in parallel, then connected with the refrigerating electronic expansion valve (12) and the battery electronic expansion valve (13) in parallel and then connected in series;

the connection mode of the passenger compartment loop part comprises the following steps: an outlet B of the kettle (17) is communicated with an inlet of a first electronic water pump (22), an outlet of the first electronic water pump (22) is communicated with an inlet of an indoor second heat exchanger (102), an outlet of the indoor second heat exchanger (102) is communicated with a second inlet of the water-cooled condenser (11), a second outlet of the water-cooled condenser (11) is communicated with an inlet of the heater (16), an outlet of the heater (16) is communicated with a port (2) of a first three-way valve (19), a port (3) of the first three-way valve (19) is communicated with an inlet B of the kettle (17), and a port (1) of the first three-way valve (19) is communicated with an inlet of the first electronic water pump (22);

the connection mode of the battery loop part is as follows: an outlet A of the kettle (17) is communicated with an inlet of a second electronic water pump (23), an outlet of the second electronic water pump (23) is communicated with an inlet of a battery cooler (14), an outlet of the battery cooler (14) is communicated with an inlet of a battery pack (15), an outlet of the battery pack (15) is communicated with a port (2) of a second three-way valve (20), a port (3) of the second three-way valve (20) is communicated with an inlet a of the kettle (17), and a port (1) of the second three-way valve (20) is communicated with an inlet of the second electronic water pump (23);

the motor loop connection mode is as follows: an outlet C of the kettle (17) is communicated with an inlet of a third electronic water pump (24), an outlet of the third electronic water pump (24) is communicated with an inlet of a motor (18), an outlet of the motor (18) is communicated with a port (2) of a third three-way valve (21), a port (3) of the third three-way valve (21) is communicated with an inlet of a heat-dissipation water tank (1), and an outlet of the heat-dissipation water tank (1) is converged with a port (1) of the third three-way valve (21) and communicated with an inlet C of the kettle (17).

4. The system and the method for multi-working-condition overall vehicle thermal management of the new energy electric vehicle according to claim 3, wherein the coolant circulation loop relates to a water path of an overall vehicle thermal management system, meets the cooling and heating requirements of a battery, a motor and a passenger compartment in a matching manner, and realizes multi-mode switching by inlet switching of a three-way valve and starting and stopping of a water pump;

1) When the ambient temperature is high in summer, one of two refrigeration modes is selectively operated in the passenger compartment; when the temperature in the passenger cabin is high, namely, the temperature is not lower than 35 ℃, and the passenger cabin needs to be rapidly cooled, the passenger cabin is switched to a first refrigeration mode, a water-cooled condenser (11) and an outdoor heat exchanger (2) need to be opened to operate, the outdoor heat exchanger (2) is used as a condenser, a compression electronic expansion valve (9), a high-pressure electromagnetic valve (4), a low-pressure electromagnetic valve (5) and a battery electronic expansion valve (13) are closed, a heating electronic expansion valve (3) is fully opened, and a refrigeration electronic expansion valve (12) is throttled; when the temperature in the passenger cabin is lower than 35 ℃ and quick cooling is not needed or the temperature in the passenger cabin is maintained, the second refrigeration mode can be switched, the outdoor heat exchanger (2) is opened to be used as a condenser, the compression electronic expansion valve (9), the high-pressure electromagnetic valve (4), the low-pressure electromagnetic valve (5) and the battery electronic expansion valve (13) are closed, the heating electronic expansion valve (3) is opened, and the refrigeration electronic expansion valve (12) is throttled;

2) In the first cooling mode, if the temperature of the battery pack (15) does not exceed the safe temperature range of battery operation, the battery pack (15) performs self-circulation without cooling; if the temperature of the battery pack (15) exceeds the safe temperature range of battery operation, a refrigerant side circulation loop needs to open a battery electronic expansion valve (13), a refrigerant shunting part flowing into the indoor first heat exchanger (101) flows into a battery cooler (14) to absorb the heat of a battery loop cooling liquid, so that the battery pack (15) is cooled, and a refrigeration-battery cooling mode is operated, wherein the mode can realize that an air-conditioning heat pump system simultaneously cools a passenger compartment and a power battery;

3) In the second refrigeration mode, if the temperature of the battery pack (15) does not exceed the safe temperature range of battery operation, the battery performs self-circulation without cooling; if the temperature of the battery pack (15) exceeds the safe temperature range of battery operation, a refrigerant side circulation loop needs to open a battery electronic expansion valve (13), part of refrigerant which is shunted to flow into the indoor first heat exchanger (101) flows into a battery cooler (14), heat of cooling liquid of a battery loop is absorbed, the battery pack (15) is cooled, and a cooling two + battery cooling mode is operated;

4) When the new energy automobile is subjected to super fast charging, a super fast charging mode is operated, a water-cooled condenser (11) and an outdoor heat exchanger (2) need to be opened to operate, the outdoor heat exchanger (2) is used as a condenser, a compression electronic expansion valve (9), a high-pressure electromagnetic valve (4), a low-pressure electromagnetic valve (5) and a refrigeration electronic expansion valve (12) are closed, a heating electronic expansion valve (3) is fully opened, and a battery electronic expansion valve (13) is throttled;

5) When the environmental temperature is lower in winter, a heating mode of the passenger compartment is operated, the water-cooled condenser (11) and the indoor second heat exchanger (102) are connected in series for heat exchange, the outdoor heat exchanger (2) is used as an evaporator, the compression electronic expansion valve (9), the high-pressure electromagnetic valve (4) and the refrigeration electronic expansion valve (12) are closed, the battery electronic expansion valve (13) is closed, the low-pressure electromagnetic valve (5) is opened, and the heating electronic expansion valve (3) is throttled;

6) In the heating and battery heating mode, if the temperature of the battery pack (15) is lower than the safe temperature range of battery operation, the (2) th interface and the (3) th interface of the second three-way valve (20) are opened, the second electronic water pump (23) pumps cooling liquid from the A port of the kettle (17), the cooling liquid flows into the battery pack (15) for heating, then flows into the a port of the kettle (17) through the second three-way valve (20), and the cooling liquid completes heat exchange of each loop in the kettle (17); if the temperature of the cooling liquid in the kettle (17) is lower than the required temperature of the heating battery pack (15), the heater (16) in the cooling liquid circulation loop of the passenger compartment can be turned on, the (3) th interface of the first three-way valve (19) is turned on at the same time, the cooling liquid in the heating kettle (17) reaches the required temperature of the heating battery pack (15) and flows into the battery circulation loop through the A port of the water kettle (17) after flowing into the kettle (17) through the b port of the kettle (17);

7) In the process of operating a passenger compartment heating mode of the new energy automobile, when waste heat on a cooling liquid side can be recycled, operating a waste heat recycling heating mode, closing a compression electronic expansion valve (9), a low-pressure electromagnetic valve (5), a refrigeration electronic expansion valve (12) and a heating electronic expansion valve (3), opening a high-pressure electromagnetic valve (4), and throttling by a battery electronic expansion valve (13);

when the serial dehumidification mode is operated, in a refrigeration medium circulation loop, the compression electronic expansion valve (9), the high-pressure solenoid valve (4), the low-pressure solenoid valve (5) and the battery electronic expansion valve (13) are closed, and the heating electronic expansion valve (3) and the refrigeration electronic expansion valve (12) are throttled; in a passenger compartment cooling liquid circulation loop, a first electronic water pump (22) is started, and a first three-way valve (19) is opened at a (2) th interface and a (1) th interface; in a cooling liquid circulation loop of the motor (18), a third electronic water pump (24) is started, and a (2) th interface and a (3) rd interface of a third three-way valve (21) are opened; in a cooling liquid circulation loop of the battery pack (15), the battery pack (15) self-circulates, the second electronic water pump (23) is started, and the (2) th interface and the (1) th interface of the second three-way valve (20) are opened;

when the parallel dehumidification mode is operated, in a refrigeration medium circulation loop, the electronic expansion valve (9) is compressed, the electronic expansion valve (3) is heated, the low-pressure electromagnetic valve (5) is closed, the high-pressure electromagnetic valve (4) is opened, and the electronic expansion valve (12) and the electronic expansion valve (13) of the battery are throttled; in the passenger compartment cooling liquid circulation loop, a first electronic water pump (22) is started, and a second connector (2) and a first connector (1) of a first three-way valve (19) are opened; in the motor cooling liquid circulation loop, a third electronic water pump (24) is started, and a (2) interface and a (1) interface of a third three-way valve (21) are opened; in the battery cooling liquid circulation loop, a second electronic water pump (23) is started, and a second three-way valve (20) is opened at a 2 nd interface and a 3 rd interface.

5. The system and the method for managing the heat of the new-energy electric vehicle under the multiple working conditions as claimed in claim 3, wherein the kettle (17), the first three-way valve (19), the second three-way valve (20) and the third three-way valve (21) are arranged in an integrated manner or integrated into a whole.

6. The system and the method for managing the heat of the new energy electric vehicle under multiple working conditions according to the claims 1, 2 or 3, characterized in that one inlet/outlet of the kettle (17) is provided, and a plurality of loop pipelines are connected in parallel at the same time, or the multiple loops are shared through different internal flow channel structures.

7. The system and the method for managing the heat of the new energy electric vehicle under the multiple working conditions as claimed in claim 1, 2 or 3, wherein the outdoor heat exchanger (2) and the heat dissipation water tank (1) are of two separate structures or are integrated into a whole structure, and a fan is provided.

8. The system and the method for multi-working-condition overall thermal management of the new energy electric vehicle as claimed in claim 1, 2 or 3, wherein the gas-liquid separator (7) is of a sleeve type structure or a U-shaped pipe type structure.

9. The system and the method for multi-working-condition overall thermal management of the new energy electric vehicle as claimed in claim 1, 2 or 3, characterized in that at low ambient temperature, the self-heating mode of the compressor 8 is used for enhancing heat exchange, and the heater (16) is eliminated in the waterway loop of the passenger compartment.

10. The system and the method for multi-working-condition vehicle thermal management of the new energy electric vehicle as claimed in claim 1, 2 or 3, characterized in that the indoor first heat exchanger (101) is an evaporator which is used as a cold source of a passenger compartment; the indoor second heat exchanger (102) is used as a heat source of a passenger compartment, and an air outlet of a blower on the air conditioning box (10) is arranged in the passenger compartment; an air duct and an air door are arranged in the air conditioning box (10).