CN114290874A

CN114290874A - Integrated expansion kettle, thermal management system and electric automobile

Info

Publication number: CN114290874A
Application number: CN202111657933.4A
Authority: CN
Inventors: 丁卯; 宋宏利; 蔡操平
Original assignee: Shanghai Feilong New Energy Auto Parts Co ltd
Current assignee: Shanghai Feilong New Energy Auto Parts Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-08

Abstract

The invention provides an integrated expansion kettle, a heat management system and an electric automobile, and belongs to the technical field of electric automobiles. The integrated expansion kettle comprises a kettle body, a multi-way valve, a channel group and a water pump group, wherein the multi-way valve is fixedly arranged at the bottom of the kettle body, and part of the multi-way valve extends into the kettle body; the channel group comprises 7 independent channels, and the independent channels are communicated with the internal cavity of the multi-way valve and the outside of the kettle body; the water pump set comprises 3 water pumps, water inlets of the water pumps are directly communicated with the independent channels one by one, and 1-2 independent channels are distributed among the water pumps; the multi-way valve is used for changing the communication state of the independent channel. The invention can reduce the length and the number of the pipelines of the heat management system, is beneficial to reducing heat loss, improving the performance of the heat management system and reducing the difficulty of assembly and maintenance.

Description

Integrated expansion kettle, thermal management system and electric automobile

Technical Field

The invention belongs to the technical field of electric automobiles, and particularly relates to an integrated expansion kettle, a thermal management system and an electric automobile.

Background

The existing electric automobile is provided with three sets of cooling liquid circulation loops for passenger cabins, batteries and electric motors, if the three sets of cooling liquid circulation loops are independently arranged, the three sets of cooling liquid circulation loops need to use independent water pumps and expansion kettles, not only occupy a large amount of automobile body space, but also cause the pipelines to be disordered and complicated, cause the difficulty in pipeline arrangement, have large assembly difficulty, influence the system performance and bring difficulty to assembly and maintenance. In this case, integrated expansion kettles have appeared, which are able to connect together three coolant circulation circuits by means of one expansion kettle.

For example, patent document CN113733842A proposes an integrated water bottle assembly, which includes a water bottle base, an integrated block, a heat exchanger and one or more water pumps, wherein the integrated block and the heat exchanger are respectively and fixedly disposed on the water bottle base, a part of the integrated block is configured as a valve body of an electronic water valve, a plurality of valve interfaces are formed on the valve body, and an internal flow passage for communicating the valve interfaces with each other is provided on the water bottle base, a water outlet interface communicated with a liquid storage cavity of the water bottle base is provided on the water bottle base, a liquid supplementing interface communicated with the internal flow passage is provided on the valve body, the liquid supplementing interface is connected and directly communicated with the water outlet interface, a water inlet of the water pump is connected and directly communicated with a corresponding valve interface, and a water outlet of one of the water pumps is communicated with the heat exchanger. In the technical scheme disclosed by the patent document, only two water pumps are arranged, four valve interfaces are formed on the valve body, but the two water pumps are matched with the four-way valve to realize independent circulating work of three sets of cooling liquid circulating loops, so that the patent document cannot realize fine control on a heat management system and cannot meet the requirement of heat management development of the conventional electric automobile.

For example, patent document CN110481275A proposes an integrated expansion kettle for an electric vehicle, which includes a multi-way valve, an expansion kettle, and a cooling loop water pump, where the multi-way valve and the cooling loop water pump are fixed to or integrally formed with a housing of the expansion kettle, the housing of the expansion kettle is further provided with a plurality of cooling interfaces communicated with a cooling loop of the electric vehicle and a plurality of heating interfaces communicated with a heating loop of the electric vehicle, the multi-way valve is used to change the conduction states of the cooling interfaces, and the cooling loop water pump is disposed in the cooling loop. The multi-way valve provided in this patent document is a five-way solenoid valve, and although three water pumps are provided, the water pump of the heating circuit is provided separately and is not integrated with the expansion tank, and therefore, the integration level of the expansion tank proposed in this patent document is not high.

Disclosure of Invention

The invention aims to solve the technical problem of providing an integrated expansion kettle, a heat management system and an electric automobile aiming at the defects of the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

an integrated expansion kettle comprises a kettle body, a multi-way valve, a channel group and a water pump group, wherein the multi-way valve is fixedly arranged at the bottom of the kettle body, and part of the multi-way valve extends into the kettle body;

the channel group comprises 7 independent channels, and the independent channels are communicated with the internal cavity of the multi-way valve and the outside of the kettle body;

the water pump set comprises 3 water pumps, water inlets of the water pumps are directly communicated with the independent channels one by one, and 1-2 independent channels are distributed among the water pumps;

the multi-way valve is used for changing the communication state of the independent channel.

Furthermore, 3 valve clacks are arranged on a valve core of the multi-way valve, the valve clacks divide an inner cavity of the multi-way valve into four independent chambers, and the independent chambers are used for communicating different independent channels.

Further, the central axes of the independent channels are located on the same horizontal plane.

Further, the multi-way valve enables 2-4 independent channels to be directly communicated, and the specific communication mode comprises the following steps:

classification 2+2+ 2: three groups of channels are provided, and each group is communicated with two independent channels;

classification 3+ 2: two groups of channels are provided, one group is communicated with the three independent channels, and the other group is communicated with the two independent channels;

and 4, classification: a group of channels is shared, and the four independent channels are communicated;

the independent channels which are not communicated are blocked by the valve flap.

Further, the multi-way valve enables the channel group to have at least 15 communication states.

A heat management system comprises the integrated expansion kettle, a passenger cabin heating system for heating a passenger cabin, a battery heat management system for heating or cooling a battery pack, and a motor electric control cooling system for cooling a motor electric control system;

pipeline water inlets of the passenger compartment heating system, the battery thermal management system and the motor electric control cooling system are communicated with the water pumps one by one, and pipeline water outlets are communicated with the independent channels one by one;

and the water outlet of the motor electric control cooling system pipeline is also connected with the other independent channel in parallel.

Furthermore, a high-voltage electric heater and a warm air core body are sequentially communicated with the pipeline of the passenger cabin heating system; the battery heat management system pipeline is also sequentially communicated with a battery cooler and a battery pack; the electric control cooling system pipeline of the motor is also sequentially communicated with a power electronic unit, the motor and a three-way valve, and the pipeline on one side after the three-way valve is shunted is also communicated with a low-temperature radiator.

The integrated expansion kettle further comprises a control module, wherein the control module is used for controlling the water pump, the high-voltage electric heater and the battery cooler to be started or shut down and controlling the working mode of the integrated expansion kettle.

Further, there are a number of thermal management modes, including:

the first mode is as follows: heating the passenger compartment, cooling the battery and electrically controlling and cooling the motor;

and a second mode: the passenger cabin and the battery are synchronously heated, and the motor is electrically controlled and cooled;

and a third mode: heating the passenger compartment by using the electric control waste heat of the motor, cooling the battery and cooling the electric control of the motor;

and a fourth mode: heating the passenger compartment, heating the battery by using the electric control waste heat of the motor and cooling the electric control of the motor;

and a fifth mode: heating the passenger compartment, cooling the battery and rapidly cooling the electric control of the motor;

mode six: the passenger compartment and the battery are heated simultaneously.

An electric vehicle comprises a vehicle body and the thermal management system installed on the vehicle body.

At present, an electric automobile is provided with three sets of cooling liquid circulation loops for a passenger compartment, a battery and an electric motor, if the three sets of cooling liquid circulation loops are independently arranged, three water pumps and three expansion kettles are needed, but the space in the automobile can be seriously occupied. In order to solve the above problems, in the prior art, three sets of cooling liquid circuits are integrated, so that the three sets of circuits use some common parts, wherein the expansion kettle occupying the largest space is the center of the integration.

The integrated expansion kettle in the prior art integrates a water pump and partial pipelines on the expansion kettle, and simultaneously, in order to realize the control of a thermal management system of an electric automobile and control each circulation loop, a multi-way valve is arranged in the expansion kettle. The integrated expansion kettle as proposed in patent document CN110481275A integrates two water pumps, and adopts a five-way valve; an integrated kettle as proposed in patent document CN113733841A integrates two water pumps, and uses a four-way valve.

Along with the demand of electric automobile thermal management development, need strengthen carrying out fine control to the thermal management system, under this kind of condition, just need three sets of coolant liquid return circuits can work independently not influence each other, do not carry out the coolant liquid exchange each other.

However, most of the expansion kettles in the prior art are only integrated with two water pumps, and only two cooling liquid circulation loops can be used, or two sets of cooling liquid circulation loops are required to share the water pumps, but the cooling liquids of the two sets of loops can be exchanged when the water pumps are shared, so that the fine control of pipelines cannot be realized.

Meanwhile, if three independent circulation loops are integrated on the same expansion kettle, at least six channels are required on the expansion kettle, a multi-way valve supporting six or more channels needs to be installed, and the six channels can be communicated in pairs to form the circulation loops by the multi-way valve. Therefore, higher demands are placed on the construction of the multi-way valve.

In order to solve the above problems, for example, patent document CN113547957A adopts two four-way valves, which may affect the integration of the expansion tank and the control of thermal management; for example, patent document CN113276630A discloses a nine-way valve, which is composed of two four-way valves and a three-way valve (three valves are connected to each other to form two common channels), and is not integrally formed.

Under the condition, the inventor overcomes the structural problem of the valve core of the multi-way valve, and provides the integrated seven-way valve, the seven-way valve can have at least fifteen communication states by rotating the valve core, and the fine control requirement of the thermal management system can be completely met.

Compared with the prior art, the invention has the following beneficial effects:

the expansion kettle provided by the invention integrates three water pumps, and can meet the independent use of three sets of cooling liquid circulation loops of the electric automobile; and meanwhile, the cooling system is provided with seven independent channels, so that the independent use of three sets of cooling liquid circulation loops of the electric automobile can be completely met. The multi-way valve arranged in the expansion kettle is a seven-way valve, the communication state of each independent channel can be changed, and the parallel or serial communication of different cooling liquid loops can be realized; the multi-way valve can realize not less than fifteen communication modes, so that the expansion kettle supports at least fifteen different working modes.

The heat management system provided by the invention comprises three cooling liquid circulation loops of a passenger compartment heating system, a battery heat management system and a motor electric control cooling system, wherein the three loops share one expansion kettle, and three water pumps for driving the cooling liquid to circulate are also integrated on the expansion kettle. Therefore, the invention can save the arrangement space of the cooling liquid circulation circuit of the electric automobile, reserve abundant arrangement space for other parts and reduce the weight of the whole electric automobile. Meanwhile, the length and the number of pipelines of the heat management system can be reduced, so that the heat loss is reduced, the performance of the heat management system is improved, and the assembly and maintenance difficulty is reduced.

Meanwhile, the expansion kettle provided by the invention can provide more communication modes and working modes, so that the expansion kettle has better universality on electric vehicles, can selectively use part or all of functions of different vehicle types, avoids the cost waste of frequently developing molds, and can shorten the development period of the whole vehicle.

The heat management system provided by the invention can realize heating of the passenger compartment, heating or cooling of the battery pack and electric control cooling of the motor, and meanwhile, in some working modes, the heat management system can realize heating of the passenger compartment or the battery by using the waste heat of the electric control system of the motor, so that the energy utilization efficiency can be improved, and the energy consumption can be reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1: a perspective view of embodiment 1 of the present invention;

FIG. 2: an exploded view of example 1 of the present invention;

FIG. 3: front view of inventive example 1;

FIG. 4: section A-A of example 1 of the present invention;

FIG. 5: the working mode of embodiment 1 of the invention is shown schematically;

FIG. 6: schematic diagram of embodiment 2 of the invention;

FIG. 7: schematic of embodiment 3 of the invention;

FIG. 8: schematic of embodiment 4 of the invention;

FIG. 9: schematic of example 5 of the invention;

FIG. 10: schematic of embodiment 6 of the invention;

FIG. 11: schematic of example 7 of the invention;

wherein: 1-a kettle body, 11-an upper kettle body, 12-a lower kettle body and 13-a kettle cover;

a water pump set: 21-a first water pump, 22-a second water pump, 23-a third water pump;

3-multi-way valve, 31-valve core shell, 32-valve core, 321-A type valve clack, 322-B type valve clack, 323-C type valve clack, 33-valve core cavity and 34-actuator;

a channel group: 41-first channel, 42-second channel, 43-third channel, 44-fourth channel, 45-fifth channel, 46-sixth channel, 47-seventh channel;

5-passenger compartment heating system, 51-high voltage electric heater, 52-warm air core body;

6-battery thermal management system, 61-battery pack, 62-battery cooler;

7-electric control cooling system of motor, 71-power electronic unit, 72-motor, 73-low temperature radiator.

Detailed Description

For a better understanding of the invention, the following description is given in conjunction with the examples and the accompanying drawings, but the invention is not limited to the examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.

It should be noted that in the description of the present invention, the terms "left and right", "top and bottom", "up and down", "front and back", "horizontal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the front view (fig. 3), and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, and thus, should not be construed as limiting the present invention.

The sectional views in the drawings of the present application are all sectional views A-A based on the front view (FIG. 3).

Example 1:

referring to fig. 1-4, the embodiment is used for providing an integrated expansion kettle, and the integrated expansion kettle comprises a kettle body 1, a multi-way valve 3 arranged at the bottom of the kettle body 1, and a water pump set and a channel set arranged on a shell of the kettle body 1.

The kettle body 1 comprises an upper kettle body 11 and a lower kettle body 12, wherein the lower kettle body 12 is positioned below the upper kettle body 11. The upper body 11 and the lower body 12 can be fixed by thermal welding, and in some alternative embodiments, the upper body 11 and the lower body 12 can also be fixedly connected by a fastener. The top of the upper kettle body 11 is provided with a filling port for filling coolant into the kettle body 1, and the filling port is provided with a kettle cover 13 capable of being sealed by threads.

The bottom of the kettle body 1 is provided with a multi-way valve 3, the upper part of the multi-way valve 3 is provided with a cylindrical valve core shell 31, a cylindrical cavity inside the valve core shell 31 is a valve core cavity 33, and a valve core 32 is arranged in the valve core shell 31. When the multi-way valve 3 is installed on the shell of the kettle body 1, the valve core shell 31 extends into the kettle body 1. An actuator 34 for controlling the operation of the valve core 32 is provided at the lower part of the multi-way valve 3, and the actuator 34 is connected to the valve core 32 in a transmission manner and can drive the valve core 32 to rotate.

A channel group is arranged at the position, close to the bottom, of the kettle body 1, the channel group can be communicated with the valve core cavity 33 and the outer part of the kettle body 1 and is a channel for the cooling liquid to enter and exit the valve core cavity 33. This embodiment the passageway group specifically includes that the central axis is located seven independent passageways of same level, is respectively: a first channel 41 at the right front, a second channel 42 at the right front, a third channel 43 at the left front, a fourth channel 44 at the leftmost side, a fifth channel 45 at the left rear, a sixth channel 46 at the right rear, and a seventh channel 47 at the rightmost side. The communication state of each independent channel in the channel group is changed through the multi-way valve 3, and the parallel connection or the serial connection of different cooling liquid loops can be realized.

The water kettle body 1 is also provided with a water pump set which can drive the cooling liquid in the water kettle body 1 to flow in the pipeline. The water pump set comprises three water pumps, the water inlets of the water pumps are communicated with the valve core cavity 33 through the pipeline set, and the water outlets are located outside the kettle body 1. The three water pumps of this embodiment do respectively: the first water pump 21 located at the rightmost side and directly communicating with the seventh passage 47, the second water pump 22 located immediately in front and directly communicating with the second passage 42, and the third water pump 23 located at the leftmost side and directly communicating with the fourth passage 44. The first water pump 21, the second water pump 22 and the third water pump 23 are all integrated on the shell of the kettle body 1, and the shell of the water pumps is fixedly connected with the shell of the kettle body 1 or integrally formed.

The water inlet of first water pump 21, second water pump 22 and third water pump 23 all is provided with the moisturizing hole, the moisturizing hole passes through check valve and the inside coolant liquid intercommunication of kettle body 1, and when needs, can be manual or automatic open the check valve, supply the coolant liquid to the pipeline in.

In this embodiment, the control of the communication state of each channel in the channel group is realized by rotating the valve core 32, and the valve core 32 is integrally cylindrical and includes a circular top plate, a circular bottom plate, and three valve flaps fixedly disposed between the top plate and the bottom plate. The three valve clacks are respectively an A-type valve clack 321, a B-type valve clack 322 and a C-type valve clack 323, the three valve clacks and the valve core shell 31 divide the valve core cavity 33 into four independent chambers, wherein one independent chamber is positioned between the A-type valve clack 321 and the valve core shell 31, one independent chamber is positioned between the B-type valve clack 322 and the valve core shell 31, one independent chamber is positioned between the C-type valve clack 323 and the valve core shell 31, and one independent chamber is positioned between the A-type valve clack 321, the B-type valve clack 322 and the C-type valve clack 323.

In some alternative embodiments, the valve core cavity 33 and the valve core 32 are both spherical, and three valve flaps capable of dividing the valve core cavity 33 into four independent chambers are also arranged on the spherical valve core 32.

Therefore, by rotating the valve core 32, the independent channels of the channel group are communicated in a combined manner by using the independent chambers, so that parallel or serial communication of different coolant circuits can be realized, and various working modes required by heat management of the whole vehicle can be realized. As shown in fig. 5, the valve core 32 and the channel set of the present embodiment can realize not less than fifteen communication modes, that is, the integrated expansion tank provided by the present embodiment supports at least fifteen different operation modes.

These communication means include at least three types: class 2+2+ 2: three groups of channels are provided, and each group is communicated with two independent channels; class 3+ 2: two groups of channels are provided, one group is communicated with three independent channels, and the other group is communicated with two independent channels; class 4: the device has a group of channels which are communicated with four independent channels. Other independent channels which are not communicated are blocked by the valve clack.

The different working modes specifically include:

the first working mode is as follows: as shown in fig. 5(1), the first passage 41 communicates with the seventh passage 47, the second passage 42 communicates with the third passage 43, and the fourth passage 44 communicates with the sixth passage 46;

and a second working mode: as shown in fig. 5(2), the second passage 42 and the fifth passage 45 are communicated with the seventh passage 47, and the third passage 43 is communicated with the fourth passage 44;

and a third working mode: as shown in fig. 5(3), the first passage 41 communicates with the second passage 42, the third passage 43 communicates with the fourth passage 44, and the fifth passage 45 communicates with the seventh passage 47;

and a fourth working mode: as shown in fig. 5(4), the first passage 41, the third passage 43 and the fifth passage 45 are communicated, and the sixth passage 46 and the seventh passage 47 are communicated;

and a fifth working mode: as shown in fig. 5(5), the first passage 41 communicates with the seventh passage 47, the second passage 42 communicates with the third passage 43, and the fourth passage 44 communicates with the fifth passage 45;

and a sixth working mode: as shown in fig. 5(6), the second passage 42 and the fourth passage 44 are communicated with a sixth passage 46, and the first passage 41 is communicated with a seventh passage 47;

the working mode is seven: as shown in fig. 5(7), the first passage 41 communicates with the second passage 42, the third passage 43 communicates with the seventh passage 47, and the fifth passage 45 communicates with the sixth passage 46;

the working mode is eight: as shown in fig. 5(8), the first channel 41, the third channel 43, the fifth channel 45 and the seventh channel 47 are communicated;

the working mode is nine: as shown in fig. 5(9), the first passage 41 communicates with the seventh passage 47, the second passage 42 communicates with the third passage 43, and the fourth passage 44 communicates with the fifth passage 45;

the working mode is ten: as shown in fig. 5(10), the first passage 41 communicates with the fourth passage 44, the second passage 42 communicates with the third passage 43, and the sixth passage 46 communicates with the seventh passage 47;

the working mode is eleven: as shown in fig. 5(11), the first passage 41 communicates with the seventh passage 47, the second passage 42 communicates with the sixth passage 46, and the third passage 43 communicates with the fourth passage 44;

the working mode is twelve: as shown in fig. 5(12), the second passage 42, the third passage 43 and the fifth passage 45 are communicated, and the first passage 41 and the seventh passage 47 are communicated;

the working mode is thirteen: as shown in fig. 5(13), the first passage 41 communicates with the second passage 42, the third passage 43 communicates with the seventh passage 47, and the fourth passage 44 communicates with the fifth passage 45;

the working mode is fourteen: as shown in fig. 5(14), the first passage 41 communicates with the second passage 42, the third passage 43 communicates with the fourth passage 44, and the sixth passage 46 communicates with the seventh passage 47;

the working mode is fifteen: as shown in fig. 5(15), the first passage 41, the fourth passage 44 and the sixth passage 46 are communicated, and the second passage 42 and the third passage 43 are communicated.

Example 2:

referring to fig. 6, the present embodiment is configured to provide a thermal management system, which includes the integrated expansion tank according to embodiment 1, a passenger compartment heating system 5, a battery thermal management system 6, an electric motor controlled cooling system 7, and a control module for performing thermal management control, where the passenger compartment heating system 5, the battery thermal management system 6, and the electric motor controlled cooling system 7 are communicated with the expansion tank.

The passenger compartment heating system 5 is for heating the passenger compartment, and includes a High Voltage Heater 51 (HVH) and a Heater core 52, the Heater core 52 being disposed at the passenger compartment, and a pipe line of the Heater core 52 communicating with the second water pump 22, the High Voltage Heater 51, the Heater core 52, and the first passage 41 in this order in a coolant flow direction.

The battery thermal management system 6 is used for heating or cooling the battery pack 61, and includes a battery cooler 62 (childler), and a pipeline of the battery cooler 62 is sequentially communicated with the third water pump 23, the battery cooler 62, the battery pack 61, and the third channel 43 according to a flow direction of a cooling liquid.

The electric control cooling system 7 of the motor is used for cooling a Power Electronic Unit 71(PEU, Power Electronic Unit) and a motor 72 (the two are generally referred to as electric control of the motor in the present application), and comprises a low-temperature radiator 73, wherein pipelines of the low-temperature radiator 73 are sequentially communicated with a first water pump 21, the Power Electronic Unit 71 and the motor 72 according to the flow direction of cooling liquid, and then are shunted through a three-way valve, one pipeline is directly communicated with a fifth channel 45, and the other pipeline is communicated with a sixth channel 46 after passing through the low-temperature radiator 73.

The control module is electrically connected with the first water pump 21, the second water pump 22, the third water pump 23, the high-voltage electric heater 51 and the battery cooler 62 and is used for controlling the starting or the closing of the first water pump 21, the second water pump 22, the third water pump 23, the high-voltage electric heater 51 and the battery cooler 62. The control module is also electrically connected with the actuator 34 and is used for controlling the working mode of the expansion kettle through the actuator 34.

The expansion kettle of the embodiment adopts a third working mode, wherein the first channel 41 is communicated with the second channel 42, the third channel 43 is communicated with the fourth channel 44, and the fifth channel 45 is communicated with the seventh channel 47.

When the second water pump 22 is operated, the second water pump 22 drives the coolant to flow out of the second passage 42, and the coolant is increased in temperature after passing through the high-voltage electric heater 51, and then enters the heater core 52. The coolant flows into the first passage 41 after passing through the warm air core 52, and then flows into the second passage 42 to continue the circulation. The coolant releases heat at the warm air core 52, and the passenger compartment heating requirement is realized.

When the third water pump 23 is operated, the third water pump 23 drives the cooling liquid to flow out from the fourth channel 44, sequentially flows through the battery cooler 62 and the battery pack 61, flows into the third channel 43, and then flows into the fourth channel 44 to continue circulation. Whether the third water pump 23 is operated depends on the requirements of the thermal management system of the entire vehicle, and whether the battery cooler 62 is operated depends on the requirements of the thermal management system of the entire vehicle. When the temperature of the battery pack 61 needs to be reduced, the third water pump 23 and the battery cooler 62 can be started to work. Or only the third water pump 23 may be started, and the coolant flowing through the battery pack 61 may balance the internal temperature of the battery pack 61, thereby achieving battery temperature equalization.

When the first water pump 21 is operated, the first water pump 21 drives the cooling liquid to flow out from the seventh passage 47, and the cooling liquid flows through the power electronic unit 71 and the motor 72 in sequence, and absorbs heat of the power electronic unit 71 and the motor 72 in the period, and because the sixth passage 46 is blocked by the C-shaped valve flap 323, the cooling liquid does not flow through the low-temperature radiator 73, but directly flows into the fifth passage 45, and then flows into the seventh passage 47 to continue circulation. Whether the first water pump 21 works depends on the requirement of a heat management system of the whole vehicle, and when the motor electric control system needs to be cooled, the first water pump 21 can be started to work.

Example 3:

referring to fig. 7, in the present embodiment, compared with embodiment 2, the expansion kettle of the present embodiment adopts a ten-mode operation, in which the first passage 41 is communicated with the fourth passage 44, the second passage 42 is communicated with the third passage 43, and the sixth passage 46 is communicated with the seventh passage 47.

When the second water pump 22 and the third water pump 23 work, the second water pump 22 drives the cooling liquid to flow out of the second channel 42, the temperature of the cooling liquid rises after the cooling liquid flows through the high-voltage electric heater 51, the cooling liquid flows into the first channel 41 after the cooling liquid flows through the warm air core 52, and then the cooling liquid flows into the fourth channel 44; the third water pump 23 drives the coolant to flow out from the fourth channel 44, flow through the battery cooler 62 and the battery pack 61 in sequence, flow into the third channel 43, and then flow into the second channel 42 to continue circulation. At this time, the battery cooler 62 is not activated, and the coolant heated by the high-voltage electric heater 51 can heat the passenger compartment and the battery pack 61 together.

When the first water pump 21 is operated, the first water pump 21 drives the cooling liquid to flow out from the seventh channel 47, and the cooling liquid flows through the power electronic unit 71 and the motor 72 in sequence, and absorbs heat of the power electronic unit 71 and the motor 72 in the period, and since the fifth channel 45 is blocked by the a-type valve 321, the cooling liquid flows into the sixth channel 46 after flowing through the low-temperature radiator 73 to reduce the temperature, and then flows into the seventh channel 47 to continue to circulate. The low-temperature radiator 73 can dissipate heat absorbed by the coolant, and therefore, the coolant can rapidly cool the power electronic unit 71 and the motor 72 during circulation. Whether the first water pump 21 works depends on the requirement of a heat management system of the whole vehicle, and when the motor and the electric control system need to be cooled, the first water pump 21 can be started to work.

Example 4:

referring to fig. 8, in the present embodiment, compared with embodiment 2, the expansion kettle of the present embodiment adopts an eleventh operation mode, in which the first passage 41 is communicated with the seventh passage 47, the second passage 42 is communicated with the sixth passage 46, and the third passage 43 is communicated with the fourth passage 44.

When the third water pump 23 is operated, the third water pump 23 drives the cooling liquid to flow out from the fourth channel 44, sequentially flows through the battery cooler 62 and the battery pack 61, flows into the third channel 43, and then flows into the fourth channel 44 to continue circulation. The cooling liquid enters the battery pack 61 after being cooled by the battery cooler 62, so that the battery pack 61 is cooled. Whether the third water pump 23 is operated depends on the requirements of the thermal management system of the entire vehicle, and whether the battery cooler 62 is operated depends on the requirements of the thermal management system of the entire vehicle. When the temperature of the battery pack 61 needs to be reduced, the third water pump 23 and the battery cooler 62 can be started to work. Or only the third water pump 23 may be started, and the coolant flowing through the battery pack 61 may balance the internal temperature of the battery pack 61, thereby achieving battery temperature equalization.

When the first water pump 21 and the second water pump 22 work, the first water pump 21 drives the cooling liquid to flow out from the seventh channel 47, the cooling liquid sequentially flows through the power electronic unit 71 and the motor 72, heat of the power electronic unit 71 and the motor 72 can be absorbed in the period, and the cooling liquid flows into the sixth channel 46 after flowing through the low-temperature radiator 73 to be cooled and then flows into the second channel 42 as the fifth channel 45 is blocked by the A-shaped valve piece 321; the second water pump 22 drives the coolant to flow out of the second passage 42, the coolant is heated by the high-voltage electric heater 51, flows into the first passage 41 after flowing through the warm air core 52, and then flows into the seventh passage 47 to continue circulation. The circuit and the battery circuit are independent from each other, the passenger cabin can be heated by waste heat of the motor electric control system in the mode, and waste heat utilization of the motor electric control system can be realized.

Example 5:

referring to fig. 9, in the present embodiment, compared with embodiment 2, the expansion kettle of the present embodiment adopts a thirteenth operation mode, in which the first passage 41 is communicated with the second passage 42, the third passage 43 is communicated with the seventh passage 47, and the fourth passage 44 is communicated with the fifth passage 45.

When the third water pump 23 and the first water pump 21 work, the third water pump 23 drives the cooling liquid to flow out from the fourth channel 44, flow through the battery cooler 62 and the battery pack 61 in sequence, flow into the third channel 43, and then flow into the seventh channel 47; the first water pump 21 drives the cooling liquid to flow out from the seventh channel 47, and the cooling liquid flows through the power electronic unit 71 and the motor 72 in sequence, during which the cooling liquid absorbs heat of the power electronic unit 71 and the motor 72, and since the sixth channel 46 is blocked by the a-shaped valve 321, the cooling liquid flows directly into the fifth channel 45 and then flows into the fourth channel 44 to continue the circulation. When the cooling liquid flows through the power electronic unit 71 and the motor 72, the cooling liquid absorbs waste heat, and when the cooling liquid flows through the battery pack 61, the cooling liquid transfers the heat to the battery pack 61 to heat the battery, and in this mode, the waste heat of the motor electronic control system can be used for heating the battery pack 61, so that the waste heat utilization of the motor electronic control system can be realized. The battery cooler 62 of this mode is not activated.

Example 6:

referring to fig. 10, in the present embodiment, compared with embodiment 2, the expansion kettle of the present embodiment adopts a fourteenth operation mode, in which the first passage 41 is communicated with the second passage 42, the third passage 43 is communicated with the fourth passage 44, and the sixth passage 46 is communicated with the seventh passage 47.

When the first water pump 21 is operated, the first water pump 21 drives the cooling liquid to flow out from the seventh channel 47, and the cooling liquid flows through the power electronic unit 71 and the motor 72 in sequence, and absorbs heat of the power electronic unit 71 and the motor 72 in the period, and since the fifth channel 45 is blocked by the C-shaped valve flap 323, the cooling liquid flows into the sixth channel 46 after flowing through the low-temperature radiator 73 to reduce the temperature, and then flows into the seventh channel 47 to continue to circulate. The low-temperature radiator 73 can dissipate heat absorbed by the coolant, and therefore, the coolant can rapidly cool the power electronic unit 71 and the motor 72 during circulation. Whether the first water pump 21 works depends on the requirement of a heat management system of the whole vehicle, and when the motor and the electric control system need to be cooled, the first water pump 21 can be started to work.

When the third water pump 23 is operated, the third water pump 23 drives the cooling liquid to flow out from the fourth channel 44, sequentially flows through the battery cooler 62 and the battery pack 61, flows into the third channel 43, and then flows into the fourth channel 44 to continue circulation. When the battery cooler 62 works, the cooling liquid is cooled by the battery cooler 62 and enters the battery pack 61 to cool the battery pack 61; when the battery cooler 62 does not operate, the coolant flowing through the battery pack 61 can balance the internal temperature of the battery pack 61, thereby achieving battery temperature equalization.

Example 7:

referring to fig. 11, in the present embodiment, a thermal management system is provided, and compared with embodiment 2, the expansion kettle of the present embodiment adopts a fifteenth operation mode, where the first channel 41, the fourth channel 44 and the sixth channel 46 are communicated, and the second channel 42 and the third channel 43 are communicated.

Since the seventh passage 47 is blocked by the a-type valve 321, the first water pump 21 of the present embodiment is not operated.

When the second water pump 22 and the third water pump 23 work, the second water pump 22 drives the cooling liquid to flow out from the second channel 42, the temperature of the cooling liquid rises after the cooling liquid flows through the high-voltage electric heater 51, the cooling liquid flows into the first channel 41 after the cooling liquid flows through the warm air core 52, and the cooling liquid cannot flow into the sixth channel 46 because the fifth channel 45 and the seventh channel 47 are blocked, so that the cooling liquid can only flow into the fourth channel 44; the third water pump 23 drives the coolant to flow out from the fourth channel 44, flow through the battery cooler 62 and the battery pack 61 in sequence, flow into the third channel 43, and then flow into the second channel 42 to continue circulation. At this time, the battery cooler 62 is not activated, and the coolant heated by the high-voltage electric heater 51 can be heated together with the passenger compartment and the battery pack 61.

Example 8:

this embodiment is used to provide an electric vehicle, which includes a vehicle body and the thermal management system according to any one of embodiments 2 to 7, wherein the thermal management system is installed on the vehicle body.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. An integrated form inflation kettle, includes the kettle body, its characterized in that: the water kettle also comprises a multi-way valve which is fixedly arranged at the bottom of the water kettle body and partially extends into the water kettle body, and a channel group and a water pump group which are fixedly arranged on the water kettle body;

2. The integrated expansion tank of claim 1, wherein: the valve core of the multi-way valve is provided with 3 valve clacks, the valve clacks divide the internal cavity of the multi-way valve into four independent chambers, and the independent chambers are used for communicating different independent channels.

3. The integrated expansion tank of claim 2, wherein: the central axes of the independent channels are positioned on the same horizontal plane.

4. The integrated expansion tank of claim 3, wherein: the multi-way valve enables 2-4 independent channels to be directly communicated, and the specific communication mode comprises the following steps:

class 2+2+ 2: three groups of channels are provided, and each group is communicated with two independent channels;

class 3+ 2: two groups of channels are provided, one group is communicated with the three independent channels, and the other group is communicated with the two independent channels;

class 4: a group of channels is shared, and the four independent channels are communicated;

5. The integrated expansion tank of claim 4, wherein: the multi-way valve enables the channel group to have at least 15 communication states.

6. A thermal management system, characterized by: an electric motor control cooling system comprising an integrated expansion tank according to any one of claims 1 to 5, a passenger compartment heating system for heating the passenger compartment, a battery thermal management system for heating or cooling the battery pack, and an electric motor control cooling system for cooling the electric motor control system;

7. The thermal management system of claim 6, wherein:

the passenger cabin heating system pipeline is also sequentially communicated with a high-voltage electric heater and a warm air core body;

the battery heat management system pipeline is also sequentially communicated with a battery cooler and a battery pack;

the electric control cooling system pipeline of the motor is also sequentially communicated with a power electronic unit, the motor and a three-way valve, and the pipeline on one side after the three-way valve is shunted is also communicated with a low-temperature radiator.

8. The thermal management system of claim 7, wherein: the integrated expansion kettle is characterized by further comprising a control module, wherein the control module is used for controlling the water pump, the high-voltage electric heater and the battery cooler to be started or shut down and controlling the working mode of the integrated expansion kettle.

9. The thermal management system of claim 8, wherein: there are a number of thermal management modes, including:

mode six: the passenger compartment and the battery are heated simultaneously.

10. An electric automobile, includes the automobile body, its characterized in that: a thermal management system according to any of claims 6 to 9 mounted on the vehicle body.