CN115447348A - Vehicle thermal management system and method and vehicle - Google Patents

Abstract

The present invention provides a vehicle thermal management system and method, and a vehicle. The vehicle thermal management system of the present invention includes a motor heat exchange circuit, a battery heat exchange circuit, a waste heat recovery pipeline and a controller assembly, and the waste heat recovery pipeline is used to recover The waste heat of the exhaust system of the engine, the first heat exchange unit is arranged between the heat exchange circuit of the motor and the waste heat recovery pipeline, the heat exchange circuit of the battery is connected in parallel with the heat exchange circuit of the motor through the communication pipeline, and the control component includes a controller, which passes through Control the motor heat exchange circuit, the waste heat recovery pipeline and the control valve in the battery heat exchange circuit to control the connection and disconnection of the three. The vehicle thermal management system of the present invention utilizes the exhaust heat generated by the engine exhaust system to heat the motor and the battery, which can reduce fuel consumption and reduce the cost of the vehicle, and can also make the motor and battery operate at a suitable temperature. It can work at a low temperature, and can give full play to the performance of the motor and battery.

Description

Vehicle thermal management system and method and vehicle

technical field

The invention relates to the technical field of vehicle thermal management, in particular to a vehicle thermal management system. At the same time, the invention also relates to a vehicle heat management method realized by applying the vehicle heat management system, and a vehicle using the vehicle heat management system.

Background technique

Existing vehicles include pure electric vehicles, hybrid vehicles and fuel vehicles, among which, hybrid vehicles can better meet the needs of passengers because they can realize motor drive mode, engine drive mode, and engine and motor hybrid drive mode .

However, due to the existing hybrid vehicles equipped with motors and batteries, the attenuation of vehicle mileage in cold winter weather has always troubled major OEMs. The heating of the motor, the heating of the battery, and the heating of the passenger compartment are all energy It comes from the battery, which makes the energy storage that is not much in itself more stretched. Therefore, how to improve the energy utilization rate of the battery and the heating of the passenger compartment is very important. At present, the development of new energy vehicles and the adoption of new technologies are a solution, but they are often costly.

Efficient heating of batteries, utilization of waste heat from motors, ultra-fast charging of batteries, and the application of heat pump technology, these energy-saving technologies and technologies that facilitate customer experience all place higher requirements on the comprehensive performance of the thermal management integrated architecture. How to integrate these The effective combination of functions needs to be realized through a reasonable thermal management architecture.

Contents of the invention

In view of this, the present invention aims to propose a thermal management system for a vehicle, so as to facilitate better performance of the motor and the battery, and to reduce the cost of using the vehicle.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A vehicle thermal management system, including a motor heat exchange circuit, a battery heat exchange circuit, waste heat recovery pipelines and control components; wherein:

The control assembly includes several control valves respectively arranged on the motor heat exchange circuit, the waste heat recovery pipeline and the battery heat exchange circuit, and controllers respectively connected to several control valves;

The controller controls several control valves, so as to control the connection and disconnection of the motor heat exchange circuit, the waste heat recovery pipeline and the battery heat exchange circuit respectively;

The waste heat recovery pipeline is used to recover the waste heat of the exhaust system of the engine;

A first heat exchange unit for heat exchange between the motor heat exchange circuit and the waste heat recovery pipeline is provided;

The battery heat exchange circuit is connected in parallel with the motor heat exchange circuit through a communication pipeline.

Further, the motor heat exchange circuit has a motor heat exchange pump and a motor connected by a motor heat exchange pipeline; the vehicle thermal management system also includes a motor heat dissipation pipeline connected in parallel in the battery heat exchange circuit, the A motor radiator is connected to the motor heat dissipation pipeline; the motor radiator, the motor heat exchange pump and the motor are connected in series through the motor heat dissipation pipeline and the motor heat exchange pipeline to form a motor heat dissipation circuit; the battery The heat exchange circuit has a battery heat exchange pump and a battery connected through a battery heat exchange pipeline; the vehicle thermal management system also includes a battery heat dissipation pipeline connected in parallel in the battery heat exchange circuit, and the battery heat dissipation pipeline is connected with A battery radiator; the battery radiator, the battery heat exchange pump, and the battery form a battery heat dissipation circuit in series through the battery heat dissipation pipeline and the battery heat exchange pipeline; the motor heat exchange pump and the motor pass through The communication pipeline is connected in series with the battery heat exchange pump and the battery.

Further, several of the control valves include a first four-way valve, two valve ports of the first four-way valve are connected in series in the heat exchange pipeline of the motor, and the other two valve ports are respectively connected to the motor cooling pipe. road and the communication pipeline; several of the control valves include a second four-way valve, the two valve ports of the second four-way valve are connected in series in the battery heat exchange pipeline, and the other two valve ports are respectively It communicates with the battery cooling pipeline and the communication pipeline.

Further, it also includes a refrigerant circuit, and the heat exchange between the refrigerant circuit and the battery heat exchange circuit is through the second heat exchange unit; the refrigerant circuit has a compressor connected through a refrigerant pipeline, a condensing The evaporator and the evaporator, and the second heat exchange unit connected in parallel with the evaporator in the refrigerant circuit; the heat exchange between the refrigerant circuit and the motor heat exchange circuit is controlled by the condenser Passage heat exchange. Further, the motor heat exchange circuit also has a motor controller and system electrical components connected through the motor heat exchange pipeline; the motor controller, the system electrical components, the motor heat exchange pump and the The motor is connected in series in the motor heat exchange circuit.

Further, several of the control valves include a three-way valve arranged in the waste heat recovery pipeline, and a first three-way valve is also provided in the waste heat recovery pipeline, and the three-way valve and the first three-way It is arranged on both sides of the first heat exchange unit, and a bypass pipeline is connected between the three-way valve and the first three-way valve.

Compared with the prior art, the present invention has the following advantages:

In the vehicle thermal management system of the present invention, by setting a waste heat recovery pipeline for collecting the exhaust heat of the engine exhaust system, and setting a first heat exchange unit between the motor heat exchange circuit and the waste heat recovery pipeline, it can be used in cold weather in winter , the heat generated by the engine exhaust system can be used to heat the motor, which is beneficial to ensure that the motor works at a suitable temperature, which can reduce fuel consumption and reduce vehicle use costs.

In addition, the battery heat exchange circuit is connected in parallel with the motor heat exchange circuit through the communication pipeline, and the heat generated by the engine exhaust system can also be used to heat the battery, which is beneficial to ensure that the battery works at a suitable temperature, and can make the motor and battery Play excellent performance.

In addition, by installing a motor radiator, it is beneficial to dissipate heat for electrical components such as the motor, and by installing a battery radiator, it is beneficial to dissipate heat for the battery, and the refrigerant circuit of the air conditioner can also use the motor radiator and battery radiator to dissipate heat at the same time. Good cooling performance.

At the same time, the present invention also provides a vehicle thermal management method, which is realized by the above-mentioned vehicle thermal management system, and the method includes:

Obtain the temperature of the motor and the temperature of the battery;

When the temperature of the motor is lower than the first motor temperature threshold, the controller controls the waste heat recovery pipeline to be connected, and the motor heat exchange circuit to be connected to heat the motor;

When the temperature of the battery is lower than the first battery temperature threshold, if the engine is started, the controller controls the waste heat recovery pipeline to communicate, and the motor heat exchange circuit communicates with the battery heat exchange circuit, so as to The motor and the battery are heated. If the engine is not started, the controller controls the motor heat exchange circuit to communicate with the battery heat exchange circuit to heat the battery.

Further, when the temperature of the motor is greater than the second motor temperature threshold, the controller controls the communication of the motor cooling circuit to cool the motor; when the outlet temperature of the motor radiator or the temperature of the motor When the inlet temperature is greater than the preset motor heat dissipation temperature threshold, the controller controls the battery heat dissipation pipeline to communicate with the motor heat dissipation circuit to cool the motor; and/or, when the temperature of the battery is greater than the second When the battery temperature threshold is reached, the controller controls the battery cooling circuit to be connected to cool down the battery; when the outlet temperature of the battery radiator or the inlet temperature of the battery is greater than the preset battery cooling temperature threshold, the The controller controls the refrigerant circuit to be connected, and the motor heat exchange circuit is connected to cool down the battery.

Further, the method further includes: when the compressor is started, acquiring the outlet temperature of the condenser; when the outlet temperature of the condenser is between the first condenser temperature threshold and the second condenser temperature threshold, the The controller controls the connection of the motor heat dissipation circuit to cool down the condenser; when the outlet temperature of the condenser is greater than the temperature threshold of the second condenser, the controller controls the motor heat dissipation circuit and the battery The heat dissipation pipeline is connected to cool down the condenser.

The vehicle heat management method of the present invention is beneficial to ensure that the battery and the motor work at a suitable temperature, and can make the motor and the battery exert excellent performance. At the same time, it can also cool down the condenser of the refrigerant circuit, which is conducive to the excellent performance of the air conditioner. Performance, the use of the vehicle heat management method on the vehicle is beneficial to reduce fuel consumption, reduce the use cost of the vehicle, and facilitate the excellent performance of the vehicle, thus having better practicability.

In addition, the present invention also provides a vehicle, wherein the vehicle is provided with the above-mentioned vehicle thermal management system.

Compared with the prior art, the vehicle of the present invention has the same beneficial effects as the aforementioned vehicle thermal management system, which will not be repeated here.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

FIG. 1 is a functional block diagram of a vehicle thermal management system according to an embodiment of the present invention;

FIG. 2 is a flow chart of a vehicle thermal management method according to an embodiment of the present invention;

Fig. 3 is a functional block diagram of the controller described in the embodiment of the present invention.

Explanation of reference signs:

1. Motor heat exchange pipeline; 101. Motor heat exchange pump; 102. Motor; 103. System electrical components; 104. Motor controller; 105. First four-way valve; 106. Motor heat dissipation pipeline; 107. Motor radiator ; 108, overflow tank; 109, the second three links; 112, the seventh three links;

2. Waste heat recovery pipeline; 201, engine; 202, three-way valve; 203, first three-way; 204, bypass pipeline;

3. Battery heat exchange pipeline; 301, battery heat exchange pump; 302, battery; 303, temperature sensor; 304 gas-liquid separator; 305, eighth three-way; 306, second four-way valve; 307, third three-way ; 308, battery cooling pipeline; 309, battery radiator;

4. Refrigerant pipeline; 401, compressor, 402, condenser; 403, evaporator; 404, first thermal expansion valve; 405, fourth three-way, 406, integrated electromagnetic expansion valve; 407, fifth three-way ; 408, the second thermal expansion valve; 409, the stop valve; 410, the refrigerant branch pipeline;

5. The first heat exchange unit; 6. The second heat exchange unit; 7. The connecting pipeline; 8. The controller; 9. The first temperature sensor; 10. The second temperature sensor; 11. The third temperature sensor; 12. The fourth temperature sensor; 13. The fifth temperature sensor.

detailed description

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back" and the like are based on the orientation or positional relationship shown in the drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary; connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in combination with specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

This embodiment relates to a vehicle thermal management system. By optimizing the management structure and using the exhaust heat of the engine exhaust system, the system is conducive to the better performance of the motor 102 and the battery 302 of the vehicle, and is conducive to reducing the cost of use of the vehicle. .

In terms of overall design, an exemplary functional block diagram of the vehicle thermal management system of this embodiment is shown in Figure 1. The vehicle thermal management system mainly includes a motor heat exchange circuit, a battery heat exchange circuit, waste heat recovery pipeline 2 and control components ; Wherein: the motor heat exchange circuit has a motor heat exchange pump 101 and a motor 102 connected through the motor heat exchange pipeline 1, the waste heat recovery pipeline 2 is used to recover the waste heat of the exhaust system of the engine 201, and the battery heat exchange circuit has a The heat exchange pipeline 3 is connected to the battery heat exchange pump 301 and the battery 302 .

The control assembly includes a number of control valves respectively arranged on the heat exchange circuit of the motor, the waste heat recovery pipeline 2 and the heat exchange circuit of the battery, and a controller 8 connected to the number of control valves respectively. The controller 8 controls the number of control valves, and can respectively Control the connection and disconnection of the motor heat exchange circuit, the waste heat recovery pipeline 2 and the battery heat exchange circuit.

In the vehicle thermal management system of this embodiment, the first heat exchange unit 5 is arranged between the motor heat exchange circuit and the waste heat recovery pipeline 2, which facilitates the heat exchange between the motor heat exchange circuit and the waste heat recovery pipeline, so that at low temperature In cold weather, the waste heat of the exhaust system of the engine can be used to heat the motor 102 . In addition, the battery heat exchange circuit is also connected in parallel to the motor heat exchange circuit through the communication pipeline 7 , and the waste heat from the exhaust system of the engine 201 can be used to heat the battery 102 .

In order to better understand the vehicle thermal management system of this embodiment, the waste heat recovery pipeline 2 will be described here first. As a preferred implementation mode, the waste heat recovery pipeline 2 passes through the first heat exchange unit 5 The recovery pipeline 2 is provided with a three-way valve 202 and a first three-way 203. The three-way valve 202 and the first three-way 203 are arranged on both sides of the first heat exchange unit 5, and the three-way valve 202 and the first three-way A bypass pipeline 204 is communicated between the passages 203, so that it is convenient to utilize the waste heat of the exhaust system of the engine. The three-way valve 202 here is connected with the controller so as to control the connection and disconnection of the waste heat recovery pipeline 2 .

Next, the motor heat exchange circuit will be described. As a preferred embodiment, the motor heat exchange circuit also has a motor controller 104 and a system electrical component 103 connected through the motor heat exchange pipeline 1 to utilize the engine exhaust system The residual heat is used for heating the motor controller 104 and the system electrical components 103 . For example, in this embodiment, the motor heat exchange pipeline 1 connects the motor 102, the motor controller 104 and the system electrical components 103 in series, all of which are set in the motor heat exchange circuit, and one end of the motor heat exchange pipeline 1 passes through After the condenser 402 , it is connected to the inlet of the motor heat exchange pump 101 , and the other end of the motor heat exchange pipeline 1 passes through the first heat exchange unit 5 and communicates with an interface of the seventh tee 112 .

The other interface of the seventh three-way 112 is connected to one interface of the second three-way 109 after passing through the first four-way valve 105 through the battery heat exchange pipeline, and the other interface of the second three-way 109 is connected to the motor heat exchange pump 101 outlet, so that the motor heat exchange circuit of this embodiment can be formed. Here, the first four-way valve 105 is a control valve installed in the heat exchange circuit of the motor. The communication pipeline 7 communicates.

In a preferred embodiment, it also includes a motor heat dissipation pipeline 106 connected in parallel in the battery heat exchange circuit, and a motor radiator 107 and an overflow tank 108 are arranged in the motor heat dissipation pipeline 106, and one end of the motor heat exchange pipeline 1 is connected to the One valve port of the first four-way valve 105 is connected, and the other end is connected with an interface of the second three-way valve 109, so that the motor radiator 107, the motor heat exchange pump 101 and the motor 102 pass through the motor heat dissipation pipeline 106 and the motor heat exchange pipeline. 1 in series to form a motor cooling circuit.

As a preferred embodiment, the vehicle thermal management system further includes a battery heat exchange loop, and the battery heat exchange loop has a battery heat exchange pump 301 and a battery 302 connected through the battery heat exchange pipeline 3 . Moreover, the battery heat exchange circuit is also connected in parallel to the motor heat exchange circuit through the communication pipeline 7, and the motor heat exchange pump 101 and the motor 102 are connected in series with the battery heat exchange pump 301 and the battery 302 through the communication pipeline 7, so that the engine 201 can be used to exhaust The waste heat of the system heats the battery 302 , and the heat generated by the motor 102 can also be used to heat the battery 302 .

In a preferred embodiment, the outlet of the battery heat exchange pump 301 is connected to an interface of the eighth three-way 305 after passing through the second heat exchange unit 6 and the battery 302 through the battery heat exchange pipeline 3, and an interface of the eighth three-way 305 The battery heat exchange pipeline 3 passes through the second four-way valve 306 and the gas-liquid separator 306 , and then is connected to the inlet of the battery heat exchange pump 301 , thereby forming a battery heat exchange circuit. In this structure, the second four-way valve 306 is the control valve in the battery heat exchange circuit, and its two valve ports are connected in series in the battery heat exchange pipeline 3, and the other two valve ports are respectively connected with the battery heat dissipation pipeline 308 and Pipeline 7 communicates.

In a preferred embodiment, a temperature sensor 303 is also provided on the battery heat exchange pipeline 3 at the outlet of the battery heat exchange pump 301, which can be connected to the controller 8 described below, where the temperature sensor 303 can be used to obtain the water temperature, And the water temperature information is sent to the controller 8.

As a preferred embodiment, the vehicle thermal management system also includes a battery heat dissipation pipeline 308 connected in parallel in the battery heat exchange circuit, the battery heat dissipation pipeline 308 is connected with a battery radiator 309 and a third tee 307, and the battery heat dissipation One end of the pipeline 308 is connected to a valve port of the second four-way valve 306, and the other end is connected to an interface of the eighth three-way valve 305, so that the battery radiator 309, the battery heat exchange pump 301 and the battery 302 pass through the battery cooling pipeline 308 and the battery. The heat exchange pipelines 3 are connected in series to form a battery cooling circuit.

As a preferred embodiment, the vehicle thermal management system further includes a refrigerant circuit, and the refrigerant circuit has a compressor 401 , a condenser 402 and an evaporator 403 connected through a refrigerant pipeline 4 . Here, the condenser 402 adopts an existing condenser, the evaporator 403 adopts an existing evaporator, and a fan can be arranged on one side of the evaporator.

In a preferred embodiment, the refrigerant pipeline 4 connecting the condenser 402 to the evaporator 403 is provided with a first thermal expansion valve 404, a fourth tee 405, a stop valve 409 and a second thermal expansion valve 408 in sequence. The refrigerant pipeline 4 connecting the evaporator 403 to the inlet of the compressor 401 is provided with a fifth tee 407, and the refrigerant pipeline 4 at the outlet of the compressor 401 is connected to the condenser 402, thereby forming a refrigerant circuit.

In a preferred embodiment, the vehicle thermal management system of this embodiment further includes a refrigerant branch pipeline 410, and a second heat exchange unit 6 is arranged on the refrigerant branch pipeline 410, and the second heat exchange unit 6 and the evaporator 403 are connected in parallel In the refrigerant circuit, the refrigerant branch pipeline 410 and the battery heat exchange circuit exchange heat through the second heat exchange unit 6 disposed therebetween.

For example, in this embodiment, the refrigerant branch pipeline 410 passes through the second heat exchange unit 6, where the second heat exchange unit 6 is preferably an existing air-cooled water cooler. An integrated electromagnetic expansion valve 406 is provided on the refrigerant branch pipeline 410 , and one end of the refrigerant branch pipeline 410 is connected to an interface of the fourth three-way 405 , and the other end is connected to an interface of the fifth three-way 407 .

The heat exchange circuit between the aforementioned motor heat exchange circuit and the refrigerant circuit is exchanged through the heat exchange control passage of the aforementioned condenser 402. For example, in this embodiment, the end of the condenser 402 on the cooling liquid side is connected to the motor through a battery heat exchange pipeline. The inlet of the heat exchange pump 101 is connected with the battery heat exchange pipeline passing through the motor 102 at the other end.

With the arrangement of the above structure, two valve ports of the first four-way valve 105 are connected in series in the motor heat exchange pipeline 1 , and the other two valve ports communicate with the motor heat dissipation pipeline 106 and the communication pipeline 7 respectively. The two valve ports of the second four-way valve 306 are connected in series in the battery heat exchange pipeline 3, and the other two valve ports are respectively communicated with the battery heat dissipation pipeline 308 and the communication pipeline 7, so that the battery heat exchange circuit can be connected in parallel to the motor In the heat exchange circuit, waste heat from the exhaust system of the engine 201 can be used to heat the motor 102 and the battery 302 at the same time.

In the vehicle heat management system of this embodiment, by setting the waste heat recovery pipeline 2 that collects the exhaust heat of the exhaust system of the engine 201, and setting the first heat exchange unit 5 between the motor heat exchange circuit and the waste heat recovery pipeline 2, the In cold weather in winter, the heat generated by the exhaust system of the engine 201 can be used to heat the motor 102, which is beneficial to ensure that the motor 102 works at a suitable temperature, which can reduce fuel consumption and reduce the cost of the vehicle.

In addition, the battery heat exchange circuit is connected in parallel to the motor heat exchange circuit through the communication pipeline 7, and the heat generated by the exhaust system of the engine 201 can also be used to heat the battery 302, which is beneficial to ensure that the battery 302 works at an appropriate temperature, and can Make the motor 102 and the battery 302 exert excellent performance.

As a preferred embodiment, as shown in Figure 3, the aforementioned controller 8 is connected with the three-way valve 202, the first four-way valve 105 and the second four-way valve 306 respectively, in addition, the controller 8 It is also connected to the first temperature sensor 9 , the second temperature sensor 10 , the third temperature sensor 11 , the fourth temperature sensor 12 and the fifth sensor 13 respectively.

Wherein, the first temperature sensor 9 can be installed in the position close to the motor 102, and it is used for obtaining the temperature of the motor 102, and the second temperature sensor 10 can be installed in the position close to the battery 302, and it is used for obtaining the temperature of the battery 302, and the third The temperature sensor 11 can be installed at the outlet of the motor radiator 107 or the inlet of the motor 102 in the motor heat exchange pipeline 1, and the fourth temperature sensor 12 can be installed at the outlet of the battery radiator 309 or the battery 302 in the battery heat exchange pipeline 3 The inlet and the fifth temperature sensor can be installed at the refrigerant outlet of the condenser 402 in the refrigerant pipeline 4 .

Preferably, the controller 8 can also be connected to the motor heat exchange pump 101, the battery heat exchange pump 301 and the compressor 401 respectively, and the temperature information obtained by each temperature sensor can be transmitted to the controller 8 respectively, so that the controller 8 The temperature information is used to control the operation of each control valve, motor heat exchange pump 101 , battery heat exchange pump 301 and compressor 401 to realize the following vehicle heat management method.

At the same time, this embodiment also relates to a vehicle thermal management method, which is realized by the above vehicle thermal management system, as shown in FIG. 2 , the method includes:

S101. Obtain the temperature of the motor 102 and the temperature of the battery 302;

S102. When the temperature of the motor 102 is lower than the first motor temperature threshold, the controller 8 controls the connection of the waste heat recovery pipeline and the connection of the motor heat exchange circuit, so as to heat the motor 102;

S103. When the temperature of the battery 302 is lower than the first battery temperature threshold, if the engine is started, the controller 8 controls the waste heat recovery pipeline to be connected, and the motor heat exchange circuit and the battery heat exchange circuit are connected to heat the motor 102 and the battery 302. If The engine is not started, and the controller 8 controls the motor heat exchange circuit to communicate with the battery heat exchange circuit, and uses the heat generated by the motor 102 to heat the battery 302 .

As a preferred embodiment, when the temperature of the motor 102 is greater than the second motor temperature threshold, the controller 8 controls the motor cooling circuit to communicate, so as to cool down the motor 102, at the outlet temperature of the motor radiator 107 or the inlet temperature of the motor 102 When the temperature is greater than the preset motor heat dissipation temperature threshold, the controller 8 controls the battery heat dissipation pipeline 308 to communicate with the motor heat dissipation circuit to cool down the motor 102 .

As a preferred embodiment, when the temperature of the battery 302 is greater than the second battery temperature threshold, the controller 8 controls the battery cooling circuit to communicate to cool the battery 302; When the temperature is greater than the preset battery cooling temperature threshold, the controller 8 controls the connection of the refrigerant circuit and the connection of the motor heat exchange circuit to cool down the temperature of the battery 302 .

As a preferred embodiment, when the compressor 401 is started and the outlet temperature of the condenser 402 is between the first condenser temperature threshold and the second condenser temperature threshold, the controller 8 controls the communication of the motor cooling circuit to The condenser 402 cools down; when the outlet temperature of the condenser 402 is greater than the second condenser temperature threshold, the controller 8 controls the motor heat dissipation circuit to communicate with the battery heat dissipation pipeline 308 to cool down the condenser 402 .

Specifically, the vehicle thermal management system of this embodiment can be applied to the following scenarios:

Scenario 1: When driving in ultra-low temperature in winter, the battery 302 and the motor 102 are heated to realize pure electricity;

A. When the vehicle engine 201 is started, the three-way valve 202 is opened in the direction a→b through proportional adjustment, and the waste gas is introduced into the first heat exchange unit 5, the motor heat exchange pump 101 is running, and the first four-way valve 105 Open c→d, at this time, the motor heat exchange pump 101 in the motor heat exchange circuit will start the water flow, and then the water in the entire circuit will be heated by the first heat exchange unit 5, which can quickly make the electrical components such as the motor 102 in the best condition The working temperature makes the vehicle reach the best dynamic performance as quickly as possible.

B. At this time, when the vehicle is recovering energy, or needs pure electric driving, if the temperature of the battery 302 is low, it will affect the efficiency of energy recovery and the discharge capacity of the battery 302, resulting in less energy recovery or vehicle power At this time, the battery 302 needs to be heated, the first four-way valve 105 realizes c→a connection, the second four-way valve 306 realizes c→d connection, a and b ports are kept closed, and the battery heat exchange pump 301 runs to turn the heat pump into the battery 302 to heat the battery 302, and then flow to the motor heat exchange circuit through the third three-way 307, and then pass through the first heat exchange unit 5 again to heat the battery 302, which is beneficial to the energy recovery of the whole vehicle and the pure electric power of the whole vehicle Driving is beneficial to reduce the energy consumption of the whole vehicle.

C. When the engine 201 is not started, the battery 302 can recycle the waste heat of the motor 102 or the motor 102 actively generates heat to heat the battery 302 through the operation of the above circuit B, so as to realize the purpose of energy saving, battery life and rapid temperature rise of the battery 302. For example, when the battery 302 is fast charged, the battery 302 needs to be heated rapidly in winter. Such a circuit connecting the motor 102 and the battery 302 can eliminate the PTC heater in the battery heat exchange circuit, which can reduce the cost of the vehicle.

Scenario 2: The battery 302, the motor 102 and the passenger compartment need to cool down

D. When the battery 302 needs to cool down, when the ambient temperature is low or suitable, the battery heat exchange circuit can use the battery radiator 309 to dissipate heat. At this time, the second four-way valve 306 keeps d→b open, a and c The port is blocked, and the battery heat exchange pump 301 is running to realize the cooling of the battery 302 through the battery radiator 309 (compared with air conditioner cooling and energy saving). If ports b and c are disconnected, the battery heat exchange pump 301 is running, and the temperature of the battery 302 is cooled by the second heat exchange unit 6 .

E. When the battery heat exchange circuit needs to be kept warm or needs to be evenly heated, the second four-way valve 306 also keeps d→a normally open, and the b and c ports are blocked, and the battery heat exchange pump 301 operates.

F. When the need for cooling of the motor heat exchange circuit is not so strong (when the motor 102 needs to dissipate heat and the air conditioner is turned off), the first four-way valve 105 keeps d→b open, and the a and c ports are blocked, and the motor heat exchange pump 101 Run (if now engine 201 works, the three-way valve 202 on the engine 201 exhaust pipe keeps a→c to pass, and b direction is unreasonable), water is pumped into the parts that need cooling such as motor 102, cools down by motor radiator 107 afterwards.

If the motor radiator 107 cannot meet the cooling requirements of the motor 102 and the air-conditioning water-cooled condenser, the first four-way valve 105 keeps b → a open, and c and d are blocked. After the motor heat exchange pump 101 pumps water into the motor radiator 107, it passes The first four-way valve 105 enters the battery heat exchange circuit, the second four-way valve 306 in the battery heat exchange circuit keeps c→b open, a and d ports are not open, water enters b through c, and then passes through the battery radiator 309, Then realize that the motor radiator 107 and the battery radiator 309 can dissipate heat for the motor 102 at the same time. This design can make full use of the two radiators to dissipate heat, preventing the motor 102 from matching a larger radiator because of the large heat dissipation, thereby reducing the overall vehicle load. weight and cost.

G. If the heat exchange circuit of the motor needs to be kept warm, the first four-way valve 105 should be kept open from c to d, and ports a and b should not be connected; the energy of the heat exchange circuit of the motor should not be lost;

Scenario 3: When the air conditioner needs to cool down

H. When the air-conditioning load is not large, the heat of the air-conditioning circuit needs to be transferred to the motor heat exchange circuit through the condenser 402, and then the motor radiator 107 is used to cool down the temperature to realize the refrigeration of the air-conditioning circuit. The specific realization of the circuit is steps, the first four The through valve 105 keeps d→b open, a and c ports are blocked, and the motor heat exchange pump 101 runs (if the engine 201 is working at this time, the three-way valve 202 in the waste heat recovery pipeline 2 keeps a→c open, and the b direction is closed), Water is pumped into motor 102 , water-cooled condenser and other components that need to be cooled, and then cooled by motor radiator 107 .

I. When the air-conditioning load is large, the first four-way valve 105 keeps b → a open, and c and d are blocked. After the motor heat exchange pump 101 pumps water into the motor radiator 107, it is pumped into the battery through the first four-way valve 105 In the heat exchange circuit, the second four-way valve 306 in the battery heat exchange circuit keeps c→b open, and the ports a and d are not connected. The water enters b through c, and then passes through the battery radiator 309, so that the two radiators can supply the motor at the same time. The heat exchange circuit and the water-cooled condenser dissipate heat to meet the heavy load demand of the air conditioning circuit.

Finally, it should be added that the three-way valve and the four-way valve in this embodiment are preferably electromagnetic valves.

The vehicle thermal management system of this embodiment has the following advantages:

A. When the vehicle engine 201 is started, the waste heat of the exhaust system of the engine 201 can be used to heat the motor 102 and the battery 302, so that the pure electric mode can be used at all times, so that as long as the engine 201 can be started, the pure electric mode can be used At the same time, use the waste heat of the engine 201 to heat each component that needs to be heated, which can greatly save the energy required for heating the components in winter, thereby effectively improving the pure electric cruising range of the vehicle at low or lower temperatures.

B. When the battery 302 needs to be heated, the battery 302 can choose to use the waste heat of the motor 102 or the exhaust gas of the engine 201 for heating. When the battery 302 needs to be cooled, it can choose to use the battery radiator 309 for cooling, or use the second heat exchange unit 6 Cooling, the diverse heating and cooling thermal management requirements of the battery 302 can be met, so as to ensure that the performance of the battery 302 is at its best for a long time, and the diversified thermal management methods can meet the requirements of battery thermal management and low energy consumption.

C. When the motor 102 needs a large heat dissipation capacity, the motor 102 can use the motor radiator 107 and the battery radiator 309 to cool down at the same time, so that in extreme cases, the two radiators can be fully used for heat dissipation, which is better than the motor 102 alone. A large-capacity radiator can save vehicle weight, layout space and cost.

D. When the air-conditioning capacity is small, the air-conditioning system can choose to use a separate motor radiator 107 to cool the condenser 402 to achieve the purpose of cooling; when the vehicle is fast-charging, the battery 302 needs a greater cooling capacity. At this time, the air-conditioning system can choose to use the combination of the motor radiator 107 and the battery radiator 309 to cool the condenser 402, which can also save the cost of matching the radiator separately and reduce the layout space occupied by the radiator alone.

E. There are many functions and a high degree of integration. For the whole vehicle, it can reduce the cost of parts, reduce the layout space, and reduce the cost and weight of the whole vehicle.

In addition, this embodiment also relates to a vehicle, in which the above vehicle thermal management system is installed. Compared with the prior art, the vehicle in this embodiment has the same beneficial effects as the aforementioned vehicle thermal management system, which will not be repeated here.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

Claims (10)

1. A vehicle thermal management system, characterized in that: Including motor heat exchange circuit, battery heat exchange circuit, waste heat recovery pipeline (2) and control components; The control assembly includes several control valves respectively arranged on the motor heat exchange circuit, the waste heat recovery pipeline (2) and the battery heat exchange circuit, and controllers ( 8); The controller (8) controls a plurality of the control valves, so as to be able to separately control the connection or disconnection of the motor heat exchange circuit, the waste heat recovery pipeline (2) and the battery heat exchange circuit; The waste heat recovery pipeline (2) is used to recover the waste heat of the exhaust system of the engine (201); A first heat exchange unit (5) for heat exchange between the motor heat exchange circuit and the waste heat recovery pipeline (2); The battery heat exchange circuit is connected in parallel with the motor heat exchange circuit through a communication pipeline (7). 2. The vehicle thermal management system according to claim 1, characterized in that: The motor heat exchange circuit has a motor heat exchange pump (101) and a motor (102) connected through the motor heat exchange pipeline (1); the vehicle thermal management system also includes a motor connected in parallel in the battery heat exchange circuit A heat dissipation pipeline (106), the motor heat dissipation pipeline (106) is connected with a motor radiator (107); the motor radiator (107), the motor heat exchange pump (101) and the motor (102) A motor heat dissipation circuit is formed by connecting the motor heat dissipation pipeline (106) and the motor heat exchange pipeline (1) in series; The battery heat exchange loop has a battery heat exchange pump (301) and a battery (302) connected through a battery heat exchange pipeline (3); A pipeline (308), the battery radiator (309) is connected to the battery cooling pipeline (308); the battery radiator (309), the battery heat exchange pump (301) and the battery (302) pass through The battery heat dissipation pipeline (308) and the battery heat exchange pipeline (3) are connected in series to form a battery heat dissipation circuit; The motor heat exchange pump (101) and the motor (102) are connected in series with the battery heat exchange pump (301) and the battery (302) through the communication pipeline (7). 3. The vehicle thermal management system according to claim 2, characterized in that: Several of the control valves include a first four-way valve (105), two valve ports of the first four-way valve (105) are connected in series in the motor heat exchange pipeline (1), and the other two valve ports are respectively communicate with the motor cooling pipeline (106) and the communication pipeline (7); Several of the control valves include a second four-way valve (306), two valve ports of the second four-way valve (306) are connected in series in the battery heat exchange pipeline (3), and the other two valve ports are respectively It communicates with the battery cooling pipeline (308) and the communication pipeline (7). 4. The vehicle thermal management system according to claim 1, characterized in that: It also includes a refrigerant circuit, and the second heat exchange unit (6) is used for heat exchange between the refrigerant circuit and the battery heat exchange circuit; the refrigerant circuit has a compressor connected through a refrigerant pipeline (4). machine (401), condenser (402) and evaporator (403), and a second heat exchange unit (6) connected in parallel with the evaporator (403) in the refrigerant circuit; Heat is exchanged between the refrigerant circuit and the motor heat exchange circuit through a heat exchange control path included in the condenser (402). 5. The vehicle thermal management system according to claim 1, characterized in that: The motor heat exchange circuit also has a motor controller (104) and a system electrical component (103) connected through the motor heat exchange pipeline (1); The motor controller (104), the system electrical components (103), the motor heat exchange pump (101) and the motor (102) are connected in series in the motor heat exchange circuit. 6. The vehicle thermal management system according to any one of claims 1-5, characterized in that: Several of the control valves include a three-way valve (202) arranged in the waste heat recovery pipeline (2), and a first three-way valve (203) is also provided in the waste heat recovery pipeline (2). The one-way valve (202) and the first three-way (203) are arranged on both sides of the first heat exchange unit (5), and between the three-way valve (202) and the first three-way ( 203) is connected with a bypass pipeline (204). 7. A vehicle thermal management method, realized by the vehicle thermal management system according to any one of claims 1-6, characterized in that the method comprises: Obtain the temperature of the motor (102) and the temperature of the battery (302); When the temperature of the motor (102) is lower than the first motor temperature threshold, the controller (8) controls the connection of the waste heat recovery pipeline and the connection of the motor heat exchange circuit to heat the motor (102) ; When the temperature of the battery (302) is lower than the first battery temperature threshold, if the engine is started, the controller (8) controls the connection of the waste heat recovery pipeline, the motor heat exchange circuit and the battery heat exchange circuit connected to heat the motor (102) and the battery (302); if the engine is not started, the controller (8) controls the motor heat exchange circuit to communicate with the battery heat exchange circuit to The battery (302) is heated. 8. The vehicle thermal management method according to claim 7, further comprising: When the temperature of the motor (102) is greater than the second motor temperature threshold, the controller (8) controls the communication of the motor cooling circuit to cool down the motor (102); in the motor radiator (107 ) or the inlet temperature of the motor (102) is greater than the preset motor heat dissipation temperature threshold, the controller (8) controls the battery heat dissipation pipeline (308) to communicate with the motor heat dissipation circuit, so as to The motor (102) cools down; and/or, When the temperature of the battery (302) is greater than the second battery temperature threshold, the controller (8) controls the connection of the battery cooling circuit to cool the battery (302); when the battery radiator (309 ) or the inlet temperature of the battery (302) is greater than the preset battery heat dissipation temperature threshold, the controller (8) controls the refrigerant circuit to communicate, and the motor heat exchange circuit to communicate with the battery ( 302) cooling down. 9. The vehicle thermal management method according to claim 8, characterized in that the method further comprises: acquiring the outlet temperature of the condenser (402) when the compressor (401) is started; When the outlet temperature of the condenser (402) is between the first condenser temperature threshold and the second condenser temperature threshold, the controller (8) controls the motor heat dissipation circuit to connect to the condenser (402) Lowering the temperature; when the outlet temperature of the condenser (402) is greater than the temperature threshold of the second condenser, the controller (8) controls the motor heat dissipation circuit and the battery heat dissipation pipeline (308) Connected to cool down the condenser (402). 10. A vehicle, characterized in that the vehicle is provided with the vehicle thermal management system according to any one of claims 1-9.

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