CN111497599B

CN111497599B - Thermal management method, device and system of extended range electric vehicle

Info

Publication number: CN111497599B
Application number: CN202010340725.0A
Authority: CN
Inventors: 石中光; 牛胜福; 李国富; 陈领平; 戴西槐; 叶良兵; 张伟
Original assignee: Shanghai Yuancheng Automobile Technology Co Ltd
Current assignee: Shanghai Yuancheng Automobile Technology Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-11-19
Anticipated expiration: 2040-04-26
Also published as: CN111497599A

Abstract

The embodiment of the invention discloses a thermal management method, a device and a system of an extended range electric vehicle. The method comprises the following steps: acquiring a thermal management request, wherein the thermal management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem; and generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, and controlling heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction. Compared with the prior art, the scheme utilizes the waste heat of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem, meets the heating requirement of the power battery subsystem, and reduces the energy consumption of the whole vehicle.

Description

Thermal management method, device and system of extended range electric vehicle

Technical Field

The embodiment of the invention relates to the technical field of electric vehicles, in particular to a thermal management method, device and system of an extended range electric vehicle.

Background

The extended range electric vehicle is a pure electric drive electric vehicle, and compared with a plug-in hybrid electric vehicle, the extended range electric vehicle has a simpler structure and higher power output quality, and is considered as a research hotspot and a key development product in the automobile industry. The extended range electric vehicle comprises a plurality of parts such as an engine, a generator, a driving motor and a power battery, and the maintenance of reasonable working temperature of each part is the basis of normal and efficient operation of the extended range electric vehicle, so that the control of the working temperature of each part at a reasonable temperature becomes a key link for the development of the extended range electric vehicle.

The existing way is to control an engine cooling system, a generator cooling system, a drive motor cooling system and a power battery system separately; or, the control is carried out after simple integration, and although the two modes can keep each part to work at a reasonable temperature, the energy consumption is high and the economical efficiency is poor.

Disclosure of Invention

The embodiment of the invention provides a thermal management method, device and system of an extended range electric vehicle, which are used for reducing the energy consumption of the whole vehicle and improving the economy.

In a first aspect, an embodiment of the present invention provides a thermal management method for an extended range electric vehicle, including:

acquiring a thermal management request, wherein the thermal management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem;

and generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction.

In a second aspect, an embodiment of the present invention further provides a thermal management device for an extended range electric vehicle, including:

the system comprises an information acquisition module, a heat management module and a control module, wherein the information acquisition module is used for acquiring a heat management request, and the heat management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem;

the first control module is used for generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, and controlling the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction.

In a third aspect, an embodiment of the present invention further provides a thermal management system for an extended range electric vehicle, including:

the system comprises a controller, an engine cooling subsystem, a generator cooling subsystem, a driving motor cooling subsystem, a power battery subsystem and a heat exchanger;

the controller is respectively connected with the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem, and the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem are respectively connected with the power battery subsystem through the heat exchangers;

the controller generates a first instruction according to a received heat management request, so that heat generated by at least one of the engine cooling subsystem, the motor cooling subsystem and the driving motor cooling subsystem is controlled to heat the power battery subsystem through the first instruction, and the heat management request comprises state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and heating demand information of the power battery subsystem.

The embodiment of the invention provides a thermal management method, a device and a system of an extended range electric vehicle, wherein a thermal management request is obtained, and the thermal management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem; and generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction. Compared with the prior art, the scheme controls at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem, fully utilizes the waste heat of the engine cooling subsystem, the generator cooling subsystem and/or the driving motor cooling subsystem, meets the heating requirement of the power battery subsystem, and reduces the energy consumption of the whole vehicle.

Drawings

Fig. 1 is a flowchart of a thermal management method for an extended range electric vehicle according to an embodiment of the present invention;

fig. 2 is a flowchart of a thermal management method for an extended range electric vehicle according to a second embodiment of the present invention;

fig. 3 is a structural diagram of a thermal management device of an extended range electric vehicle according to a third embodiment of the present invention;

fig. 4 is a structural diagram of a thermal management system of an extended range electric vehicle according to a fourth embodiment of the present invention;

fig. 5 is a structural diagram of a thermal management system of another extended range electric vehicle according to a fourth embodiment of the present invention;

fig. 6 is a partial detailed schematic view of a thermal management system of an extended range electric vehicle according to a fourth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. In addition, the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.

Example one

Fig. 1 is a flowchart of a thermal management method for an extended range electric vehicle according to an embodiment of the present invention, which is applicable to an extended range electric vehicle, and reduces energy consumption of the entire vehicle by managing state information of an engine cooling subsystem, a generator cooling subsystem, and a driving motor cooling subsystem of the extended range electric vehicle and a power battery subsystem. The method can be executed by a thermal management device of the extended range electric vehicle, the device can be realized in a software and/or hardware mode and is generally integrated in the extended range electric vehicle, wherein the extended range electric vehicle can be an electric vehicle, an electric bicycle, an electric motorcycle and the like. Referring to fig. 1, the method may include the steps of:

and S110, acquiring a thermal management request.

Wherein the thermal management request includes status information of the engine cooling subsystem, the generator cooling subsystem, and the drive motor cooling subsystem, and heating demand information of the power battery subsystem. The status information of the engine cooling subsystem is information for indicating whether the engine is operated, and the embodiment does not limit the expression form of the status information, and may be, for example, directly indicated as engine operation or engine non-operation, or may be indicated by a number + a status variable, for example, a0 indicates engine operation, a1 indicates engine non-operation, where a is a number corresponding to the engine, 0 indicates engine operation, and 1 indicates engine non-operation. The state information of the generator cooling subsystem and the drive motor cooling subsystem are similar. The heating requirement information of the power battery subsystem is information for indicating that the power battery has a heating requirement, and the indication mode may be similar to that of the engine, or may also adopt other modes, and the embodiment is not limited.

The thermal management request can be obtained through a user side, wherein the user side can be an intelligent terminal such as a mobile phone, a computer and wearable equipment. The working states of the engine, the generator and the driving motor and the heating requirement of the power battery can be determined according to the heat management request, wherein the working states of the engine, the generator and the driving motor can be controlled by a switching valve, for example, when the engine is required to be put into operation, the switching valve in the same loop with the engine can be controlled to be conducted, otherwise, the switching valve is controlled to be closed, and the purpose of enabling each subsystem to normally work is achieved by controlling the switching valve.

And S120, generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, and controlling heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction.

The first command is a command for controlling the working states of the engine, the generator and the driving motor, namely a command for controlling the on or off of the corresponding switch valve. The engine, the generator and the driving motor can generate certain heat when working, the embodiment carries out unified management on the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the power battery subsystem, the waste heat generated by the working of at least one of the engine, the generator and the driving motor is used for heating the power battery in the power heating subsystem, compared with the traditional mode of independently controlling the working of each subsystem, the heater is directly used for heating the power battery, the embodiment realizes waste heat utilization while ensuring the normal working of each subsystem, and reduces energy consumption.

The embodiment of the invention provides a thermal management method of an extended range electric vehicle, which comprises the steps of obtaining a thermal management request, wherein the thermal management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem; and generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction. Compared with the prior art, the scheme controls at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem, fully utilizes the waste heat of the engine cooling subsystem, the generator cooling subsystem and/or the driving motor cooling subsystem, meets the heating requirement of the power battery subsystem, and reduces the energy consumption of the whole vehicle.

Example two

Fig. 2 is a flowchart of a thermal management method for an extended range electric vehicle according to a second embodiment of the present invention, which is embodied on the basis of the second embodiment, and referring to fig. 2, the method includes the following steps:

and S210, acquiring a thermal management request.

Optionally, the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem of the present embodiment includes that the engine cooling subsystem and the generator cooling subsystem do not work, and the driving motor cooling subsystem works; or the engine cooling subsystem and the generator cooling subsystem work, and the driving motor cooling subsystem does not work; or the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously. Namely the engine and the generator do not work and the driving motor works; or the engine and the generator work, and the driving motor does not work; alternatively, the engine, the generator, and the drive motor operate simultaneously.

And S220, generating a first state control instruction, controlling the first switch valve and the second switch valve to be closed, and controlling the second output ends of the third switch valve and the fourth switch valve and the first output end of the fifth switch valve to be conducted.

The first state control instruction is a control instruction for controlling the engine and the generator to stop working and driving the motor to work. Optionally, in the embodiment, the working state of the engine is controlled by the first switching valve and the fifth switching valve; the working state of the generator is controlled by the second switch valve and the fourth switch valve, or the second switch valve, the fourth switch valve and the fifth switch valve; and the working state of the driving motor is controlled by the third switch valve and the fourth switch valve or the third switch valve, the fourth switch valve and the fifth switch valve. The first, second and third on-off valves may be two-position two-way solenoid valves having an input and an output, and outputting a control result according to a received control signal. The fourth and fifth switch valves may be two-position three-way solenoid valves, which have one input, two outputs, and different outputs in different control loops, for example, in the fifth switch valve of the embodiment, one output may be in a control loop of the engine, and the other output may be in a control loop of the generator or the driving motor.

Specifically, when the engine and the generator do not work and the driving motor works, the first state control instruction is an instruction for controlling the first switch valve and the second switch valve to be closed and the second output ends of the third switch valve and the fourth switch valve and the first output end of the fifth switch valve to be conducted. In this case, even if the engine does not work, the waste heat of the driving motor can be used for heating the power battery, and the economical efficiency is improved.

And S221, controlling the heat generated by the driving motor to heat the power battery.

Optionally, the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem may be connected to the power battery subsystem through a heat exchanger, and as described above, when the engine and the generator are not in operation, the waste heat of the driving motor may be heated by the heat exchanger for the power battery.

And S230, generating a second state control instruction, controlling the conduction of the first output ends of the first switch valve, the second switch valve and the fourth switch valve and the first output end of the fifth switch valve, and closing the third switch valve.

The second state control instruction is a control instruction for controlling the engine and the generator to work and driving the motor to not work. The engine in this embodiment includes two return circuits, is big circulation circuit and little circulation circuit respectively, and wherein big circulation circuit is the return circuit at thermostat first output place, mainly used cooling engine, and when the temperature of the coolant liquid that the engine flows out was higher than the setting value, thermostat's first output switched on, realizes the cooling through big circulation circuit. The small circulation loop is a loop where the second output end of the thermostat is located, the second output end of the thermostat is in a normally open state, water flows through the second output end as long as the engine runs, and when the power battery has a heating requirement, the power battery can be heated through the small circulation loop.

Under the condition that the engine and the generator work simultaneously, when the power battery has a heating requirement, the waste heat of the engine can be preferentially utilized to heat the power battery because the working temperature of the engine is higher than the temperatures of the generator and the driving motor. Optionally, the second state control instruction is specifically an instruction for controlling the conduction of the first output ends of the first switch valve, the second switch valve and the fourth switch valve and the conduction of the first output end of the fifth switch valve, and the closing of the third switch valve. When the temperature of water from the engine exceeds a set value, the first output end of the thermostat is conducted, the large circulation loop is put into operation, at the moment, part of water flowing out of the engine is radiated through the large circulation loop to cool the engine, and part of the water is heated for the power battery through the small circulation loop. Furthermore, in order to realize energy conservation, the cooling liquid output by the small circulation loop and the cooling liquid output by the large circulation loop can be controlled to be mixed and then enter the generator loop through secondary cooling to cool the generator. Compared with the traditional mode of cooling the cooling liquid flowing out of the engine once and then cooling the generator again, the mode of cooling the generator again and again can reduce the power and the size of the radiator, and cost is saved. The working temperature of an engine in the extended range electric vehicle is usually 90 ℃, the working temperature of a generator and a driving motor is usually 65 ℃, and the working temperature of a power battery is usually 20-35 ℃.

And S231, controlling the heat generated by the engine to heat the power battery.

Because the operating temperature of engine is higher than generator or driving motor, this embodiment uses the waste heat of priority utilization engine as the power battery heating when engine and generator simultaneous working as the example, certainly, if power battery's coolant temperature is too low, can also control the second output of fourth ooff valve and switch on, reaches the purpose of rapid heating through the power of the heater of adjusting the second output connection.

And S240, generating a third state control instruction, and controlling the conduction of the first output ends of the first switch valve, the second switch valve, the third switch valve and the fourth switch valve and the first output end of the fifth switch valve.

The third state control instruction is a control instruction for simultaneously controlling the engine, the generator and the driving motor to work, and specifically may be an instruction for controlling the conduction of the first output ends of the first switch valve, the second switch valve, the third switch valve and the fourth switch valve and the first output end of the fifth switch valve. Similarly, when the engine, the generator and the driving motor work simultaneously, the embodiment takes the preferential utilization of the waste heat of the engine as the heating of the power battery, so as to reduce the energy consumption of the whole vehicle. Along with the work of the engine, the temperature of water flowing out of the engine is continuously increased, and when the temperature reaches a set value, the large circulation loop is put into work, so that the waste heat is utilized for heating, and meanwhile, the cost of the radiator is further reduced.

And S241, controlling the engine to heat the power battery.

When the temperature of the cooling liquid of the power battery is too low, the second output end of the fourth switch valve can be controlled to be conducted, and the purpose of rapid heating is achieved by adjusting the power of the heater connected with the second output end.

The second embodiment of the invention provides a thermal management method for an extended range electric vehicle, when an engine is put into operation, because the operating temperature of the engine is higher than that of a generator and a driving motor, the embodiment preferentially utilizes the waste heat of the engine to heat a power battery, so that the heating efficiency is improved, when the generator or the driving motor is also put into operation, the large circulation of the engine is controlled to be started, the secondary cooling is realized, and the cooling cost is reduced.

Further, the thermal management method of the extended range electric vehicle provided in this embodiment further includes:

when the engine cooling subsystem and the generator cooling subsystem work and the driving motor cooling subsystem does not work, controlling the generator cooling subsystem to be connected with the engine cooling subsystem through a first electronic water pump;

when the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously, the generator cooling subsystem is controlled to be connected with the engine cooling subsystem through a first electronic water pump, and the driving motor subsystem is controlled to be connected with the engine cooling subsystem through the first electronic water pump.

The electronic water pump is used for improving the working pressure of cooling liquid in the heat management system, maintaining the circulation of the cooling liquid and preventing the temperature of an engine, a generator or a driving motor from being overhigh. In a conventional manner, since the operating temperatures of the engine, the generator and the driving motor are different, the engine, the generator and the driving motor are separately controlled, that is, one water pump is used for cooling the engine, and the other water pump is used for cooling the generator or the driving motor, thereby increasing the cooling cost. The embodiment is improved on the basis, the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem are controlled to share one water pump, and the first electronic water pump is taken as an example.

Optionally, in this embodiment, an output end of the first electronic water pump is connected to the engine, the generator and the driving motor, and an input end of the first electronic water pump is connected to a first output end of the fourth switch valve and a second output end of the fifth switch valve. When the engine and the generator work, in one condition, the first output ends of the first switch valve, the second switch valve, the fourth switch valve and the fifth switch valve can be controlled to be conducted, so that the engine and the generator share the first electronic water pump. When the engine, the generator and the driving motor work simultaneously, in one case, the first output ends of the first switch valve, the second switch valve, the third switch valve, the fourth switch valve and the fifth switch valve can be controlled to be conducted, so that the engine, the generator and the driving motor share the first electronic water pump. Therefore, unified management of the engine, the generator and the driving motor is realized, and the cooling cost is reduced.

Further, the thermal management request also comprises warm air demand information;

correspondingly, the thermal management method of the extended range electric vehicle provided by the embodiment further includes:

and generating a second instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the warm air demand information, so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to be warmed through the second instruction.

The hot air demand information is information with a hot air demand. The second command is a command for controlling at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to work to generate heat for heating. Under the condition of ensuring the normal work of each subsystem, the embodiment utilizes the waste heat of at least one of the engine, the generator and the driving motor to heat, thereby realizing the secondary utilization of the waste heat and further reducing the energy consumption of the whole vehicle.

Optionally, the input end of the warm air core is connected with the output ends of the generator cooling subsystem, the driving motor cooling subsystem and the engine cooling subsystem respectively, and the output end of the warm air core is connected with the input end of the first electronic water pump. When there is a warm air demand, in one case, the second instruction may be an instruction for controlling the third switch valve, the second output end of the fourth switch valve and the first output end of the fifth switch valve to be turned on, and the other switch valves to be turned off, and warming is performed by using waste heat of the driving motor.

EXAMPLE III

Fig. 3 is a structural diagram of a thermal management apparatus of an extended range electric vehicle according to a third embodiment of the present invention, which can perform the thermal management method of the extended range electric vehicle according to the third embodiment of the present invention, and referring to fig. 3, the apparatus may include:

the information acquisition module 31 is configured to acquire a thermal management request, where the thermal management request includes state information of an engine cooling subsystem, a generator cooling subsystem, and a drive motor cooling subsystem, and heating demand information of a power battery subsystem;

and the first control module 32 is configured to generate a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, so as to control heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction.

The embodiment of the invention provides a thermal management device of an extended range electric vehicle, which is characterized in that a thermal management request is obtained, wherein the thermal management request comprises state information of an engine cooling subsystem, a generator cooling subsystem and a driving motor cooling subsystem and heating demand information of a power battery subsystem; and generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction. Compared with the prior art, the scheme controls at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem, fully utilizes the waste heat of the engine cooling subsystem, the generator cooling subsystem and/or the driving motor cooling subsystem, meets the heating requirement of the power battery subsystem, and reduces the energy consumption of the whole vehicle.

On the basis of the above embodiment, the state information of the engine cooling subsystem, the generator cooling subsystem and the drive motor cooling subsystem includes that the engine cooling subsystem and the generator cooling subsystem do not work, and the drive motor cooling subsystem works; or the engine cooling subsystem and the generator cooling subsystem work, and the driving motor cooling subsystem does not work; or the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously.

On the basis of the foregoing embodiment, the first control module 32 is specifically configured to:

when the engine cooling subsystem and the generator cooling subsystem do not work and the motor cooling subsystem is driven to work, a first state control instruction is generated to control the first switch valve and the second switch valve to be closed, and the second output ends of the third switch valve and the fourth switch valve are conducted with the first output end of the fifth switch valve;

when the engine cooling subsystem and the generator cooling subsystem work and the driving motor cooling subsystem does not work, a second state control instruction is generated to control the conduction of the first output ends of the first switch valve, the second switch valve and the fourth switch valve and the first output end of the fifth switch valve, and the third switch valve is closed;

and when the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously, a third state control instruction is generated, and the conduction of the first output ends of the first switch valve, the second switch valve, the third switch valve and the fourth switch valve and the conduction of the first output end of the fifth switch valve are controlled.

On the basis of the above embodiment, the apparatus further includes: a second control module to:

On the basis of the above embodiment, the thermal management request further includes warm air demand information;

correspondingly, the device also comprises:

and the third control module is used for generating a second instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the warm air demand information so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to be heated through the second instruction.

The thermal management device of the extended range electric vehicle provided by the embodiment of the invention can execute the thermal management method of the extended range electric vehicle in the embodiment, and has the corresponding functional modules and beneficial effects of the execution method.

Example four

Fig. 4 is a structural diagram of a thermal management system of an extended range electric vehicle according to a fourth embodiment of the present invention, and referring to fig. 4, the system includes a controller 1, an engine cooling subsystem 2, a generator cooling subsystem 3, a driving motor cooling subsystem 4, a power battery subsystem 5, and a heat exchanger 6;

the controller 1 is respectively connected with the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4, and the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 are respectively connected with the power battery subsystem 5 through the heat exchanger 6;

the controller 1 generates a first instruction according to the received thermal management request, so as to control heat generated by at least one of the engine cooling subsystem 2, the motor cooling subsystem 3 and the driving motor cooling subsystem 4 to heat the power battery subsystem 5 through the first instruction, wherein the thermal management request comprises state information of the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 and heating demand information of the power battery subsystem 5.

Specifically, the engine cooling subsystem 2 is used for cooling the engine when the engine works, the motor cooling subsystem 3 is used for cooling the generator when the generator works, and the driving motor cooling subsystem 4 is used for cooling the driving motor when the driving motor works. Because the working temperature of the engine is higher than that of the generator and the driving motor, the engine cooling subsystem 2, the motor cooling subsystem 3, the driving motor cooling subsystem 4 and the power battery subsystem 5 in the traditional thermal management system are separately designed, and the design mode is easy to control but poor in economical efficiency. The embodiment improves the above, integrates engine cooling, motor cooling and power battery heating into a system, fully utilizes the waste heat of the engine and the motor, meets the heating requirement of the power battery, reduces the energy consumption of the whole vehicle, and improves the economy.

The heat exchanger 6 is used for establishing the connection between the engine cooling subsystem 2, the motor cooling subsystem 3 and the driving motor cooling subsystem 4 and the power battery subsystem 5, so that when the controller 1 controls at least one of the engine cooling subsystem 2, the motor cooling subsystem 3 and the driving motor cooling subsystem 4 to work according to the received heat management request, the heat exchanger 6 is used for heating the power battery in the power battery subsystem 5, and waste heat utilization is achieved.

The thermal management request comprises state information of the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 and heating demand information of the power battery subsystem. Optionally, the state information of the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 includes that the engine cooling subsystem 2 and the generator cooling subsystem 3 do not work, and the driving motor cooling subsystem 4 works; or the engine cooling subsystem 2 and the generator cooling subsystem 3 work, and the driving motor cooling subsystem 4 does not work; alternatively, the engine cooling subsystem 2, the generator cooling subsystem 3 and the drive motor cooling subsystem 4 operate simultaneously.

Specifically, when the engine cooling subsystem 2 and the generator cooling subsystem 3 do not work and the driving motor cooling subsystem 4 works, the controller 1 controls the waste heat of the driving motor to heat the power battery through the heat exchanger 6; when the engine cooling subsystem 2 and the generator cooling subsystem 3 work and the driving motor cooling subsystem 4 does not work, the controller 1 can preferentially control the waste heat of the engine to heat the power battery through the heat exchanger 6 because the working temperature of the engine is higher than that of the generator; when the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 work simultaneously, the controller 1 can preferentially control the waste heat of the engine to heat the power battery through the heat exchanger, and the heating efficiency is improved.

The embodiment of the invention provides a thermal management system of an extended range electric vehicle, which unifies engine cooling, motor cooling and power battery heating into a system on the basis of the prior art, establishes the connection between an engine cooling subsystem and a motor cooling subsystem and a power battery subsystem through a heat exchanger, and heats a power battery by using waste heat of an engine and a motor, thereby reducing the energy consumption of the whole vehicle and improving the economical efficiency.

Fig. 5 is a structural diagram of another thermal management system of an extended range electric vehicle according to a fourth embodiment of the present invention, and on the basis of the foregoing embodiment, referring to fig. 5, the system further includes a first electronic water pump 7;

the output ends of the generator cooling subsystem 3 and the driving motor cooling subsystem 4 are respectively connected with the input end of a first electronic water pump 7, and the output end of the first electronic water pump 7 is respectively connected with the input ends of the generator cooling subsystem 3 and the driving motor cooling subsystem 4; the output end of the first electronic water pump 7 is also connected with the input end of the engine cooling subsystem 2, and the output end of the engine cooling subsystem 2 is connected with the input end of the first electronic water pump 7.

In the traditional heat management system, because each subsystem is separately designed, more electronic water pumps are provided, and the cost is increased. Considering that the electronic water pumps in the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 have similar functions and are all used for improving the working pressure of the cooling liquid and maintaining the circulation of the cooling liquid, the embodiment enables the engine cooling subsystem 2, the generator cooling subsystem 3 and the driving motor cooling subsystem 4 to share the first electronic water pump 7, saves the number of the electronic water pumps and reduces the cost. As shown in fig. 5, the engine cooling subsystem 2 shares part of the pipelines with the generator cooling subsystem 3 and the driving motor cooling subsystem 4 in addition to the first electronic water pump 7, so that the cost is further reduced, and convenience is provided for the arrangement of the whole vehicle.

On the basis of the above embodiment, with reference to fig. 5, the system further comprises a warm air core 8;

the input end of the warm air core body 8 is respectively connected with the output ends of the generator cooling subsystem 3, the driving motor cooling subsystem 4 and the engine cooling subsystem 2, and the output end of the warm air core body 8 is connected with the input end of the first electronic water pump 7.

The warm air core 8 is used for heating, especially in the range-extended electric vehicle, the warm air core 8 can heat the passenger compartment, compared with the traditional heating by using a PTC heater, the warm air core 8 can reduce the cost, and optionally, in order to accelerate the heating, a fan can be arranged at the warm air core 8. As shown in fig. 5, when there is a warm air demand, the waste heat of at least one of the generator cooling subsystem 3, the driving motor cooling subsystem 4 and the engine cooling subsystem 2 can be controlled to pass through the warm air core 8 to warm the passenger compartment, so that the secondary utilization of the waste heat is realized.

Fig. 6 is a partial detailed schematic view of a thermal management system of an extended range electric vehicle according to a fourth embodiment of the present invention, and referring to fig. 6, on the basis of the fourth embodiment, the engine cooling subsystem 2 includes an engine 21, a first radiator 22, a first switching valve a, a fifth switching valve E, and a thermostat 23;

the output end of the engine 21 is connected with the first radiator 22 through the first output end of the thermostat 23 and is sequentially connected with the warm air core body 8 and the fifth switch valve E through the second output end of the thermostat 23, the first radiator 22 is sequentially connected with the input end of the engine 21 through the first electronic water pump 7 and the first switch valve A, the first output end of the fifth switch valve E is sequentially connected with the input end of the engine 21 through the heat exchanger 6, the first electronic water pump 7 and the first switch valve A, and the second output end of the fifth switch valve E is connected with the input end of the first electronic water pump 7.

The first radiator 22 is used to reduce the temperature of the coolant flowing out of the engine 21, and optionally, the first radiator 22 is a radiator with larger power, so that the temperature of the coolant flowing out of the engine can be quickly reduced. In order to further improve the heat dissipation efficiency, a fan may be further added at the first heat sink 22. The first switch valve a is used for controlling the opening or closing of a large circulation in combination with the first output end of the thermostat 23, when the first switch valve a is turned on and the temperature of water flowing out of the engine 21 is higher than a set value, the large circulation is opened, otherwise, the large circulation is closed, namely, a loop formed by the engine 21, the first output end of the thermostat 23, the first radiator 22, the first electronic water pump 7 and the first switch valve a can quickly reduce the temperature of the cooling liquid. The first switch valve a is combined with a fifth switch valve E to further control the on or off of a small cycle of the engine 21, where the small cycle is a loop formed by the engine 21, the second output end of the thermostat 23, the warm air core 8, the fifth switch valve E, the first electronic water pump 7 and the first switch valve a, where the fifth switch valve E is a two-position three-way electromagnetic valve, as shown in fig. 6, one output end of the fifth switch valve E is connected to the heat exchanger 6, and the other output end is connected to the input end of the first electronic water pump 7, and when the power battery has a heating demand, the output end connected to the heat exchanger 6 can be controlled to be turned on. The first switch valve A is a two-position two-way electromagnetic valve.

On the basis of the above embodiment, referring to fig. 6, the generator cooling subsystem 3 includes the second switching valve B, the generator 31, the generator controller 32, the fourth switching valve D, and the second radiator 33;

the driving motor cooling subsystem 4 comprises a third on-off valve C, a driving motor 41 and a driving motor controller 42;

the input end of the second radiator 33 is connected with the output end of the first electronic water pump 7, the output end of the second radiator 33 is sequentially connected with the generator controller 32 and the generator 31 through a second switch valve B and is sequentially connected with the driving motor controller 42 and the driving motor 41 through a third switch valve C; the output ends of the generator 31 and the driving motor 41 are respectively connected with the input end of a fourth switch valve D, the first output end of the fourth switch valve D is connected with the input end of the first electronic water pump 7, and the second output end of the fourth switch valve D is connected with the input end of the warm air core body 8.

As shown in fig. 6, the second switching valve B and the third switching valve C are two-position two-way solenoid valves. The second radiator 33 is used to cool the generator 31 and the driving motor 41, wherein the second radiator 33 has lower power than the first radiator 22. When the large circulation of the engine 21 is started, the water flowing out of the engine 21 is cooled by the first radiator 22 and then mixed with the small circulation and the water flowing out of the generator 31 and the driving motor 41, the mixed water enters the second radiator 33, and enters the generator 31 and the driving motor 41 after being secondarily cooled by the second radiator 33, so that the temperature of the generator 31 and the temperature of the driving motor 41 are reduced, and compared with the water flowing out of the engine 21 directly, the power and the size of the first radiator 22 and the second radiator 33 required by the secondary cooling are smaller, and the cost is lower.

On the basis of the above embodiment, referring to fig. 6, the driving motor cooling subsystem 4 further includes a heater 43;

an input end of the heater 43 is connected with a second output end of the fourth switching valve D, and an output end of the heater 43 is connected with an input end of the warm air core body 8.

The heater 43 is used to achieve rapid heating when the water temperature is low or the temperature of the power battery is low.

On the basis of the above embodiment, referring to fig. 6, the power battery subsystem 5 includes a second electronic water pump 51 and a power battery 52, the second electronic water pump 51 is used for promoting the circulation of the cooling liquid in the power battery subsystem 5, and the power battery 52 is used for driving the motor, providing the driving of the whole vehicle.

Taking the extended range electric vehicle as an example, the operation process of the thermal management system will be described with reference to fig. 6 according to the state information of the engine, the generator, and the driving motor, the warm air requirement, and the heating requirement of the power battery.

Example one: the engine and the generator do not work, and the driving motor works

(1) No warm air requirement and no heating requirement of power battery

In this case, the controller 1 may control the first output ends of the third switch valve C and the fourth switch valve D to be turned on, and the other switch valves to be turned off, so that the driving motor 41, the fourth switch valve D, the first electronic water pump 7, the second radiator 33, the third switch valve C, and the driving motor controller 42 form a loop, and the driving motor 41 is prompted to normally operate. And the branch at the second output end of the fourth switch valve D is controlled to be closed, so that the flow resistance of the system and the power consumption of the first electronic water pump 7 can be reduced. The temperature of the coolant in the circuit before the motor controller 42 is driven to the second radiator 33 is higher than the temperature of the coolant output from the second radiator 33.

(2) The requirement of warm air exists, and the requirement of no heating of a power battery exists

In this case, the controller 1 may control the second output terminals of the third and fourth switching valves C and D and the second output terminal of the fifth switching valve E to be turned on, and the other switching valves to be turned off, so that the driving motor 41, the fourth switching valve D, the heater 43, the warm air core 8, the fifth switching valve E, the first electronic water pump 7, the second radiator 33, the third switching valve C, and the driving motor controller 42 form a loop, and the driving motor 41 is prompted to normally operate. Specifically, rivers behind the driving motor 41 heating can reach the effect of quick heating on the one hand through opening the fan of warm braw core 8 department through warm braw core 8, realize waste heat utilization, and on the other hand can also reduce the temperature of the water through warm braw core 8, and then reduces the power of second radiator 33, reaches energy-conserving effect. The temperature of the coolant between the drive motor 41 and the warm air core 8, the temperature of the coolant between the warm air core 8 and the second radiator 33, and the temperature of the coolant between the second radiator 33 and the drive motor controller 42 in this circuit are sequentially decreased. Optionally, according to the size of the hot air demand, the power of the heater 43 can be adjusted, the response is fast, and compared with the method of directly heating cold water, the power consumption is low.

(3) No warm air requirement, and the power battery has heating requirement

In this case, the controller 1 may control the second output terminals of the third and fourth switching valves C and D and the first output terminal of the fifth switching valve E to be turned on, and the other switching valves to be turned off, so that the driving motor 41, the fourth switching valve D, the heater 43, the warm air core 8, the fifth switching valve E, the heat exchanger 6, the first electronic water pump 7, the second radiator 33, the third switching valve C, and the driving motor controller 42 form a loop, and the driving motor 41 is prompted to normally operate. Specifically, the hot water passing through the driving motor 41 heats the power battery 52 through the heat exchanger 6, so that waste heat utilization is realized. Optionally, if the water temperature is low, the power of the heater 43 may be adjusted according to the heating requirement of the power battery 52, so as to achieve the purpose of rapidly heating the power battery 52, and compared with directly heating cold water, the power consumption of the heater 43 is small. The fan at the heater core 8 can be turned off because there is no warm air requirement. The temperature of the coolant between the drive motor 41 and the heat exchanger 6, the temperature of the coolant between the heat exchanger 6 and the second radiator 33, and the temperature of the coolant between the second radiator 33 and the drive motor controller 42 in this circuit are sequentially decreased.

(4) The power battery has the heating requirement

The on-off condition of each switch valve under the condition is the same as the condition without the warm air requirement, and the on-off condition of each switch valve is the same when the power battery has the heating requirement, and the details are not repeated herein. In addition, in the case, due to the requirement of warm air, the fan at the warm air core body 8 can be started to realize quick heating; the cooled hot water continuously passes through the heat exchanger 6 to heat the power battery 52, so that the waste heat is utilized twice. Optionally, according to the water temperature, the warm air and the heating demand, the power of the heater 43 can be adjusted to realize rapid heating, and compared with direct heating of cold water, the power consumption of the heater 43 is low.

Example two: the engine and the generator work, and the driving motor does not work

(1) Large circulation closing, no warm air requirement, no power battery heating requirement

When the temperature of the water flowing out of the engine is lower than a set value, the large circulation is in a closed state. Under the condition of large-cycle shutdown, when the power battery has no heating requirement and no warm air requirement, the controller 1 may control the first output ends of the first switch valve a, the second switch valve B, the fourth switch valve D and the second output end of the fifth switch valve E to be turned on, and the other switch valves to be turned off, so that the engine 21, the thermostat 23, the warm air core 8, the fifth switch valve E, the first electronic water pump 7 and the first switch valve a form a small-cycle loop of the engine 21, and the generator controller 32, the generator 31, the fourth switch valve D, the first electronic water pump 7, the second radiator 33 and the second switch valve B form a loop of the generator 31. Wherein, the second output end of the fourth switch valve D is controlled to be closed, so that the flow resistance of the system can be reduced.

(2) Large circulation shut-off, warm air demand, power battery no heating demand

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle off, no warm air requirement and no heating requirement of the power battery, and the detailed description is omitted here. The difference is that when there is the warm braw demand, the fan can be opened to water in the little circulation when the warm braw core 8, realizes the quick utilization of waste heat, also can reduce the temperature of water simultaneously. Optionally, according to the water temperature and the warm air demand, the second output end of the fourth switch valve D can be controlled to be opened, and the purpose of rapid heating is achieved by adjusting the power of the heater 43.

(3) Large circulation closing, no warm air requirement and power battery heating requirement

In this case, the controller 1 may control the first output terminals of the first, second, and fourth switching valves a, B, D and the first output terminal of the fifth switching valve E to be turned on, and the other switching valves to be turned off, so that the engine 21, the thermostat 23, the warm air core 8, the fifth switching valve E, the heat exchanger 6, the first electronic water pump 7, and the first switching valve a constitute a small circulation circuit of the engine 21, and the generator controller 32, the generator 31, the fourth switching valve D, the first electronic water pump 7, the second radiator 33, and the second switching valve B constitute a circuit of the generator 31. Specifically, the small-circulation water heats the power battery 52 through the heat exchanger 6, so that waste heat utilization is realized. Optionally, according to the water temperature and the battery heating requirement, the second output end of the fourth switch valve D can be controlled to be opened, and the purpose of rapid heating is achieved by adjusting the power of the heater 43.

(4) Large circulation cut-off, warm air demand, power battery heating demand

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle off, no warm air requirement and heating requirement of the power battery, and the detailed description is omitted here. The difference is that the fan can be started when the small-circulation water passes through the warm air core body 8, so that the heating is realized, the water temperature in the warm air core body 8 is reduced, and the cooled water passes through the heat exchanger 6 to heat the power battery 52, so that the waste heat is utilized twice. Optionally, according to the water temperature, the warm air or the battery heating requirement, the second output end of the fourth switch valve D may be controlled to be opened, and the purpose of rapid heating may be achieved by adjusting the power of the heater 43.

(5) Large circulation opening, no need of warm air and no need of power battery for heating

When the temperature of the water flowing out of the engine is higher than the set value, the second output end of the thermostat 23 is conducted, and the large circulation is started. When the large cycle is on, when there is no warm air demand and no heating demand of the power battery, the controller 1 may control the first output ends of the first switch valve a, the second switch valve B, the fourth switch valve D, and the second output end of the fifth switch valve E to be on, and the other switch valves to be off, so that the engine 21, the thermostat 23, the warm air core 8, the fifth switch valve E, the first electronic water pump 7, and the first switch valve a form a small cycle loop of the engine 21, the thermostat 23, the first radiator 22, the first electronic water pump 7, and the first switch valve a form a large cycle loop of the engine 21, and the generator controller 32, the generator 31, the fourth switch valve D, the first electronic water pump 7, the second radiator 33, and the second switch valve B form a loop of the generator 31.

After the major cycle is started, the water flowing out of the engine 21 is cooled by the first radiator 22 and then mixed with the water flowing out of the minor cycle and the generator, the mixed water partially enters the second radiator 33, and the mixed water partially enters the generator 31 after secondary cooling, so that compared with the water directly cooling the engine 21, the power and the size of the first radiator 22 and the second radiator 33 are small, the cost is low, and the arrangement is simple.

(6) Large circulation open, warm air demand, power battery no heating demand

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle opening, no warm air requirement and no heating requirement of the power battery, and the detailed description is omitted here. The difference is that the fan can be started when the small-circulation water passes through the warm air core body 8, so that the warming is accelerated.

(7) Large circulation open, no warm air requirement, power battery heating requirement

Under the condition, the second output end of the fifth switch valve E is controlled to be closed, the first output end of the fifth switch valve E is controlled to be opened, and the states of other switch valves are not changed on the basis of large-cycle opening, no warm air requirement and no heating requirement of the power battery.

(8) Large circulation open, warm air demand, power battery heating demand

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle opening, no warm air requirement and heating requirement of the power battery, and the detailed description is omitted here. The difference is that the fan can be started when the small-circulation water passes through the warm air core body 8, so that the warming is accelerated.

Example three: the engine, the generator and the driving motor work simultaneously

In this case, the controller 1 may control the first output terminals of the first switch valve a, the second switch valve B, the third switch valve C, the fourth switch valve D, and the second output terminal of the fifth switch valve E to be turned on, so that the engine 21, the thermostat 23, the warm air core 8, the fifth switch valve E, the first electronic water pump 7, and the first switch valve a constitute a small circulation loop of the engine 21, the generator controller 32, the generator 31, the fourth switch valve D, the first electronic water pump 7, the second radiator 33, and the second switch valve B constitute a loop of the generator 31, and the driving motor controller 42, the driving motor 41, the fourth switch valve D, the first electronic water pump 7, the second radiator 33, and the third switch valve C constitute a loop of the driving motor 41.

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle off, no warm air requirement and no heating requirement of the power battery, and the detailed description is omitted here. The difference is that when the small circulation water passes through the warm air core body 8, the fan can be started to accelerate the heating. Optionally, according to the water temperature and the warm air requirement, the second output end of the fourth switch valve D can be controlled to be opened, and the purpose of rapid heating is achieved by adjusting the power of the heater 43.

Under the condition, the second output end of the fifth switch valve E is controlled to be closed, the first output end is controlled to be opened, and the states of other switch valves are not changed on the basis of large-cycle closing, no warm air requirement and no heating requirement of the power battery.

(4) Large circulation cut-off, warm air demand, power battery heating demand

The on and off conditions of the switch valves under the condition are the same as the on and off conditions of the switch valves under the conditions of large-cycle off, no warm air requirement and heating requirement of the power battery, and the detailed description is omitted here.

In this case, the controller 1 can control the conduction of the first output terminals of the first switch valve a, the second switch valve B, the third switch valve C, the fourth switch valve D and the second output terminal of the fifth switch valve E, the other on-off valves are closed, so that the engine 21, the thermostat 23, the warm air core 8, the fifth on-off valve E, the first electronic water pump 7 and the first on-off valve a form a small circulation circuit of the engine 21, the thermostat 23, the first radiator 22, the first electronic water pump 7 and the first on-off valve a form a large circulation circuit of the engine 21, the generator controller 32, the generator 31, the fourth on-off valve D, the first electronic water pump 7, the second radiator 33 and the second on-off valve B form a circuit of the generator 31, and the driving motor controller 42, the driving motor 41, the fourth on-off valve D, the first electronic water pump 7, the second radiator 33 and the third on-off valve C form a circuit of the driving motor 41.

(6) Large circulation open, warm air demand, power battery no heating demand

Under the condition, the on-off condition of each switch valve and the on-off condition of each switch valve when the large circulation is opened, the hot air demand is not existed, and the power battery has no heating demand, are not described again here.

Under the condition, the second output end of the fifth switch valve E is controlled to be closed, the first output end is controlled to be opened, and the states of other switch valves are not changed on the basis of large-cycle opening, no warm air requirement and no heating requirement of the power battery.

(8) Large circulation open, warm air demand, power battery heating demand

Under the condition, the on-off condition of each switch valve and the condition of large-cycle opening, no warm air requirement and the on-off condition of each switch valve when the power battery has a heating requirement are not described again.

The system integrates engine cooling, motor cooling and power batteries into one system, normal work of all subsystems is promoted through the state of the switching valve, meanwhile, waste heat is fully utilized, the energy consumption of the whole vehicle is reduced, and economy is achieved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for thermal management of an extended range electric vehicle, comprising:

generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem, and controlling heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction;

the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem comprises that the engine cooling subsystem and the generator cooling subsystem do not work, and the driving motor cooling subsystem works; or the engine cooling subsystem and the generator cooling subsystem work, and the driving motor cooling subsystem does not work; or the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously;

the generating of the first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery comprises the following steps:

when the engine cooling subsystem and the generator cooling subsystem do not work and the motor cooling subsystem is driven to work, a first state control instruction is generated to control the first switch valve and the second switch valve to be closed, the third switch valve is conducted, the second output end of the fourth switch valve is conducted and the first output end of the fifth switch valve is conducted;

when the engine cooling subsystem and the generator cooling subsystem work and the driving motor cooling subsystem does not work, a second state control instruction is generated to control the conduction of the first switch valve, the conduction of the second switch valve, the conduction of the first output end of the fourth switch valve and the conduction of the first output end of the fifth switch valve, and the closing of the third switch valve;

and when the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem work simultaneously, a third state control instruction is generated, and the conduction of the first switch valve, the conduction of the second switch valve, the conduction of the third switch valve, the conduction of the first output end of the fourth switch valve and the conduction of the first output end of the fifth switch valve are controlled.

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein the thermal management request further comprises warm air demand information;

correspondingly, the method further comprises the following steps:

4. A thermal management device of an extended range electric vehicle, comprising:

the first control module is used for generating a first instruction according to the state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and the heating demand information of the power battery subsystem so as to control the heat generated by at least one of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem to heat the power battery subsystem through the first instruction;

the first control module is specifically configured to:

5. The thermal management system of the extended range electric vehicle is characterized by comprising a controller, an engine cooling subsystem, a generator cooling subsystem, a driving motor cooling subsystem, a power battery subsystem and a heat exchanger;

the controller generates a first instruction according to a received thermal management request, so that heat generated by at least one of the engine cooling subsystem, the motor cooling subsystem and the driving motor cooling subsystem is controlled to heat the power battery subsystem through the first instruction, and the thermal management request comprises state information of the engine cooling subsystem, the generator cooling subsystem and the driving motor cooling subsystem and heating demand information of the power battery subsystem;

6. The system of claim 5, further comprising a first electronic water pump;

the output ends of the generator cooling subsystem and the driving motor cooling subsystem are respectively connected with the input end of the first electronic water pump, and the output end of the first electronic water pump is respectively connected with the input ends of the generator cooling subsystem and the driving motor cooling subsystem; the output end of the first electronic water pump is further connected with the input end of the engine cooling subsystem, and the output end of the engine cooling subsystem is connected with the input end of the first electronic water pump.

7. The system of claim 6, further comprising a warm air core;

the input end of the warm air core body is respectively connected with the output ends of the generator cooling subsystem, the driving motor cooling subsystem and the engine cooling subsystem, and the output end of the warm air core body is connected with the input end of the first electronic water pump.

8. The system of claim 7, wherein the engine cooling subsystem comprises an engine, a first radiator, a first on-off valve, a fifth on-off valve, and a thermostat;

the output end of the engine is connected with the first radiator through the first output end of the thermostat and is sequentially connected with the warm air core and the fifth switch valve through the second output end of the thermostat, the first radiator is sequentially connected with the input end of the engine through the first electronic water pump and the first switch valve, the first output end of the fifth switch valve is sequentially connected with the input end of the engine through the heat exchanger, the first electronic water pump and the first switch valve, and the second output end of the fifth switch valve is connected with the input end of the first electronic water pump.