CN117162733A

CN117162733A - Thermal management system and method for hybrid vehicle

Info

Publication number: CN117162733A
Application number: CN202311021393.XA
Authority: CN
Inventors: 张艳芳; 张爱文; 常乃文; 张悦; 高姝吉
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-12-05

Abstract

The application provides a thermal management system and method for a hybrid vehicle. The system comprises: an engine cooling device, a warm air heating device, a motor cooling device, a battery cooling device and a control device. The engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device are subjected to heat management through the control device, so that the engine, the motor assembly and the battery of the hybrid electric vehicle are always in a proper temperature range in the running process, the oil consumption of the engine is reduced, and the driving mileage of the battery is prolonged. The waste heat of the hybrid power vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

Description

Thermal management system and method for hybrid vehicle

Technical Field

The application relates to the technical field of thermal management of hybrid vehicles, in particular to a thermal management system, a thermal management method, a thermal management medium and electronic equipment of a hybrid vehicle.

Background

With the development of the automobile industry, the requirements on the oil consumption and the emission of the engine are higher, and more automobile types start to use the special hybrid power engine. The hybrid electric vehicle consumes the electricity of the battery in a pure electric mode, and is green and energy-saving. In the hybrid mode, the motor drives the vehicle to generate electricity, the rotation speed of the engine is irrelevant to the speed of the vehicle, and the engine can always work in the most economical working area to achieve the maximum energy-saving effect. The temperature value of the battery has great influence on the discharge power and discharge quantity of the battery, and the battery needs to be subjected to low-temperature heat preservation and high-temperature heat dissipation. The heat capacity of the battery is large, and if the battery is heated by the electric heater all the time, the consumed energy is too large. If the battery is cooled, the refrigerant is always used for radiating heat of the battery, the compressor needs to be started, and the consumed energy is large.

Accordingly, the present application provides a thermal management method for a hybrid vehicle to solve the above-mentioned technical problems.

Disclosure of Invention

The present application aims to provide a thermal management system, a method, a medium and an electronic device for a hybrid vehicle, which can solve at least one technical problem mentioned above. The specific scheme is as follows:

according to a first aspect of the present application, there is provided a thermal management system for a hybrid vehicle, comprising:

an engine cooling device including at least an engine;

the warm air heating device is coupled with the engine cooling device and at least comprises a high-pressure warm air blower;

the motor cooling device is coupled with the battery cooling device and at least comprises a motor assembly;

the battery cooling device is in thermal coupling connection with the warm air heating device and at least comprises a battery;

and a control device which is respectively in communication connection with the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device and is configured to: determining a thermal management mode based on the detected at least one key information associated with the battery; and in the thermal management mode, controlling at least one of the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device to enable the battery in the battery cooling device to work within a preset working temperature range.

Optionally, the at least one key information includes a maximum temperature value of the battery and a charging operation state of the battery;

the control device is configured to determine a thermal management mode based on the detected at least one key information associated with the battery, comprising:

when the maximum temperature value of the battery is detected to be less than or equal to 15 ℃ and the charging working state of the battery is detected to be a gun charging state, determining that the thermal management mode is a charging heating mode;

when the maximum temperature value of the battery is detected to be greater than or equal to 18 ℃ or the charging working state of the battery is detected to be a non-gun charging state, determining that the thermal management mode is a non-charging heating mode;

accordingly, the control device is configured to control at least one of the engine cooling device, the warm air heating device, the motor cooling device, and the battery cooling device in the thermal management mode, so that the battery in the battery cooling device operates within a preset operating temperature value range, and the control device comprises:

and in the charging heating mode, controlling the warm air heating device to ensure that the water inlet temperature value of the battery in the battery cooling device does not exceed 55 ℃.

Optionally, the at least one key information includes a maximum temperature value of the battery;

when the maximum temperature value of the battery is detected to be less than or equal to 25 ℃, determining that the thermal management mode is a driving heating mode;

when the maximum temperature value of the battery is detected to be more than or equal to 28 ℃, determining that the thermal management mode is a non-driving heating mode;

and in the driving heating mode, controlling at least one device of the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device to ensure that the water inlet temperature value of a battery in the battery cooling device is not more than 45 ℃.

Optionally, the control device is configured to control at least one device of the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device in the driving heating mode, so that the water inlet temperature value of the battery in the battery cooling device is not more than 45 ℃, and the control device comprises:

In the driving heating mode, when the hybrid power vehicle is detected to be in a stable driving state and a heating request of a passenger cabin is obtained, determining heating power required by the passenger cabin;

and when the heating power is larger than a preset heating power threshold, heating the battery in the battery cooling device by adopting a first heating strategy, wherein the first heating strategy refers to a strategy of utilizing the waste heat of a motor assembly in the motor cooling device to enable the water inlet temperature value of the battery not to exceed 45 ℃.

in the driving heating mode, when the hybrid vehicle is detected to be in a stable driving state and a heating request of the passenger cabin is not obtained, detecting a maximum temperature value of the battery;

when the maximum temperature value is less than or equal to 0 ℃, a second heating strategy or a third heating strategy is adopted for heating the battery, wherein the second heating strategy refers to a first strategy for enabling the water inlet temperature value of the battery to be not more than 45 ℃ by utilizing the waste heat of a high-pressure fan heater in a warm air heating device, and the third heating strategy refers to a second strategy for enabling the water inlet temperature value of the battery to be not more than 45 ℃ by utilizing the waste heat of the high-pressure fan heater in the warm air heating device;

And when the maximum temperature value is greater than 0 ℃, adopting the first heating strategy to heat the battery.

in the driving heating mode, when the hybrid power vehicle is detected to be in a starting state and a heating request of the passenger cabin is obtained, detecting an air outlet temperature value of the passenger cabin;

when the temperature value of the air outlet meets the preset temperature value condition, detecting the heat of the engine;

and when the heat of the engine meets the preset heat condition, adopting a fourth heating strategy for heating the battery, wherein the fourth heating strategy is a strategy for utilizing the waste heat of the engine in the engine cooling device to enable the water inlet temperature value of the battery to be not more than 45 ℃.

Optionally, the control device is further configured to:

and when the temperature value of the air outlet does not meet the preset temperature value condition, adopting the first heating strategy to heat the battery.

Optionally, the control device is further configured to:

in the driving heating mode, when the heat of the engine does not meet a preset heat condition, detecting a maximum temperature value of the battery;

when the maximum temperature value is less than or equal to 0 ℃, adopting a fifth heating strategy for heating the battery, wherein the fifth heating strategy is a strategy for utilizing the waste heat of an engine in the engine cooling device and the waste heat of a high-pressure fan heater in the warm air heating device to enable the water inlet temperature value of the battery not to exceed 45 ℃;

Optionally, the control device is further configured to:

and in the driving heating mode, when the hybrid power vehicle is detected to be in a starting state and a heating request of the passenger cabin is not obtained, adopting the fourth heating strategy to heat the battery.

Optionally, the at least one key information includes: a battery temperature value of the battery, an ambient temperature value, and a water temperature value of the motor assembly;

When the battery temperature value of the battery is detected to be greater than or equal to 35 ℃, the ambient temperature value is less than or equal to 25 ℃, and the water temperature value of the motor assembly is less than or equal to the battery temperature value, determining that the thermal management mode is a radiator cooling mode;

when the battery temperature value of the battery is detected to be less than or equal to 32 ℃ or the ambient temperature value is greater than or equal to 28 ℃ or the water temperature value of the motor assembly is greater than the battery temperature value, determining that the thermal management mode is a non-radiator cooling mode;

and in the radiator cooling mode, controlling the battery cooling device and the motor cooling device to ensure that the water inlet temperature value of the battery in the battery cooling device is not more than 45 ℃.

Optionally, the at least one key information includes a battery temperature value of the battery;

when the battery temperature value of the battery is detected to be greater than or equal to 39 ℃, determining that the thermal management mode is a forced cooling mode;

when the battery temperature value of the battery is detected to be less than or equal to 35 ℃, determining that the thermal management mode is a non-forced cooling mode;

in the forced cooling mode, the battery cooling device and the motor cooling device are controlled so that the water inlet temperature value of the battery in the battery cooling device does not exceed 45 ℃.

Optionally, the at least one key information includes a water temperature value of a motor assembly in the motor cooling device;

When the water temperature value of the motor assembly in the motor cooling device is detected to be greater than or equal to 42 ℃, determining that the thermal management mode is a motor cooling mode;

when the water temperature value of the motor assembly in the motor cooling device is detected to be less than or equal to 40 ℃, determining that the thermal management mode is a non-motor cooling mode;

and in the motor cooling mode, controlling the motor cooling device to enable the motor assembly to dissipate heat.

According to a second aspect of the present application, there is provided a method of thermal management of a hybrid vehicle, comprising:

determining a thermal management mode based on the detected at least one key information associated with the battery in the battery cooling device;

and in the thermal management mode, controlling at least one device of an engine cooling device, a warm air heating device, a motor cooling device and a battery cooling device to enable a battery in the battery cooling device to work within a preset working temperature range.

the determining a thermal management mode based on the detected at least one key information associated with the battery in the battery cooling device includes:

accordingly, the controlling at least one of the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device in the thermal management mode to make the battery in the battery cooling device work within a preset working temperature range includes:

Optionally, the controlling at least one of the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device in the driving heating mode to make the water inlet temperature value of the battery in the battery cooling device not exceed 45 ℃ includes:

Optionally, the method further comprises:

According to a third aspect of the present application, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of thermal management of a hybrid vehicle as defined in any one of the above.

According to a fourth aspect of the present application, there is provided an electronic device comprising: one or more processors; a storage means for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the method of thermal management of a hybrid vehicle as claimed in any one of the preceding claims.

Compared with the prior art, the scheme provided by the embodiment of the application has at least the following beneficial effects:

the application provides a thermal management system, a method, a medium and an electronic device of a hybrid vehicle. The system comprises: an engine cooling device, a warm air heating device, a motor cooling device, a battery cooling device and a control device. The engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device are subjected to heat management through the control device, so that the engine, the motor assembly and the battery of the hybrid electric vehicle are always in a proper temperature range in the running process, the oil consumption of the engine is reduced, and the driving mileage of the battery is prolonged. The waste heat of the hybrid power vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

The control device controls the opening degree of the thermal management module in the engine cooling device through closed loop feedback, so that the water temperature value of the engine is maintained within the range of 85-95 ℃; controlling the opening of an electric water pump on a water path according to the water temperature value of the engine, and selecting the waste heat of the engine or the waste heat of the motor to heat the battery so that the battery is in an optimal working temperature range; through the control logic of closed loop linkage lean, the waste heat of the hybrid electric vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

Drawings

FIG. 1 illustrates a schematic diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application;

FIG. 2 illustrates a schematic diagram of another hybrid vehicle thermal management system according to an embodiment of the application;

fig. 3 shows a flowchart of a method of thermal management of a hybrid vehicle according to an embodiment of the application.

Reference numerals illustrate:

1-an engine cooling device, 2-a warm air heating device, 3-a motor cooling device, 4-a battery cooling device and 5-a control device;

11-an engine, 12-a first electric water pump, 13-a thermal management module, 14-a heat radiation module, 15-a first expansion tank, 16-an electric control four-way valve, 161-a first outlet, 162-a first inlet, 163-a second outlet, 164-a second inlet;

21-high-pressure fan heater, 22-second electric water pump, 23-warm air core, 24-an electric control three-way valve, 241-a third inlet, 242-a fourth inlet, 243-a third outlet;

31-a motor assembly, 32-a third electric water pump, 33-a second expansion water tank, 34-a motor radiator, 35-an electric control five-way valve, 351-a fifth inlet, 352-a fourth outlet, 353-a multifunctional interface, 354-a sixth inlet, 355-a fifth outlet;

41-cooler, 42-fourth electric water pump, 43-heat exchanger, 44-battery.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish one from another. For example, a first may also be referred to as a second, and similarly, a second may also be referred to as a first, without departing from the scope of embodiments of the application.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.

In particular, the symbols and/or numerals present in the description, if not marked in the description of the figures, are not numbered.

Alternative embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Embodiments provided for the present application, namely embodiments of a thermal management system for a hybrid vehicle.

An embodiment of the present application will be described in detail with reference to fig. 1.

An embodiment of the present application provides a thermal management system of a hybrid vehicle, including: an engine cooling device 1, a warm air heating device 2, a motor cooling device 3, a battery cooling device 4 and a control device 5.

The engine cooling device 1 includes at least: the engine 11, the first electric water pump 12, the thermal management module 13 (such as the schiffer thermal management module 13 (english full name Temperature management module, abbreviated as TMM)), the heat radiation module 14, the first expansion tank 15, and the electrically controlled four-way valve 16 are shown in fig. 2.

The warm air heating device 2 is coupled with the engine cooling device 1 and at least comprises: a high-pressure fan heater 21 (i.e. a high-pressure PTC), a second electric water pump 22, a warm air core 23 and an electric control three-way valve 24. As shown in fig. 2, the warm air heating device 2 and the engine cooling device 1 are coupled and connected through an electric control four-way valve 16.

Motor cooling device 3, with battery cooling device 4 coupling connection, include at least: a motor assembly 31 (e.g., a motor and inverter assembly), a third electric water pump 32, a second expansion tank 33, a motor radiator 34, and an electronically controlled five-way valve 35. As shown in fig. 2, the motor cooling device 3 and the battery cooling device 4 are coupled and connected through an electrically controlled five-way valve 35.

The battery cooling device 4 is thermally coupled to the warm air heating device 2, and includes at least a battery 44, a cooler 41 (e.g., a Chiller, which can transfer heat from one object to another object to lower the temperature value of the object), a fourth electric water pump 42, and a heat exchanger 43. As shown in fig. 2, the battery cooling device 4 is thermally coupled to the warm air heating device 2 via a heat exchanger 43 (e.g., a water heat exchanger).

A control device 5 communicatively connected to each of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4, and configured to: determining a thermal management mode based on the detected at least one key information associated with the battery 44; in the thermal management mode, at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 is controlled so that the battery 44 in the battery cooling device 4 operates within a preset operating temperature value range.

In the embodiment of the application, the first electric water pump 12, the second electric water pump 22 and the third electric water pump 32 are controlled according to PWM duty ratio, 10% duty ratio is not operated, 85% duty ratio is operated according to the maximum rotating speed, and stepless speed regulation is carried out between 10% and 85%; TMM is adjusted according to the opening degree, and the opening degree is adjusted steplessly from 0% to 100%; the fan of the engine 11 is controlled to be not operated by 10 percent of duty ratio according to PWM duty ratio, and is operated by 85 percent of duty ratio with maximum rotating speed, and stepless speed regulation is carried out between 10 percent and 85 percent. The thermal management system of the entire hybrid vehicle is divided into 4 thermal management modes: default mode, charge heating mode, drive heating mode, and cooling mode.

In the default mode, after the hybrid vehicle is powered on at high voltage, each component enters a default position, and the working state of each component is changed along with the mode change. The default positions are as follows:

1. position of electronically controlled four-way valve 16: 0% (i.e., the first outlet 161 is in communication with the first inlet 162, and the second outlet 163 is in communication with the second inlet 164);

2. duty ratio of the second electric water pump 22: 10% (no operation);

3. high voltage PTC power: 0kw;

4. position of the electronically controlled three-way valve 24: 0% (third inlet 241, fourth inlet 242 and third outlet 243 are all conducting);

5. Position of electronically controlled five-way valve 35: the fifth inlet 351 communicates with the fourth outlet 352, and the sixth inlet 354 communicates with the fifth outlet 355;

6. duty ratio of the fourth electric water pump 42: 10% (no operation);

7. duty cycle of the first electric water pump 12: 10% (no operation);

8. duty ratio of the third electric water pump 32: 10% (no operation);

9. position of TMM: 0% (radiator off);

10. duty cycle of engine 11 fan: 10% (no operation).

In some embodiments, the at least one key information includes a maximum temperature value of the battery 44 and a state of charge operation of the battery 44.

The control device 5 is configured to determine a thermal management mode based on the detected at least one key information associated with the battery 44, comprising: when the maximum temperature value of the battery 44 is detected to be less than or equal to 15 ℃ and the charging working state of the battery 44 is detected to be a gun charging state, determining that the thermal management mode is a charging heating mode; when it is detected that the maximum temperature value of the battery 44 is greater than or equal to 18 ℃, or it is detected that the charging operation state of the battery 44 is an un-gun-inserted charging state, the thermal management mode is determined to be a non-charging heating mode.

The thermal management mode of this embodiment is a charge heating mode.

The non-charging heating mode refers to any thermal management mode except the charging heating mode.

Accordingly, the control device 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the thermal management mode, to operate the battery 44 in the battery cooling device 4 within a preset operating temperature value range, including: in the charge heating mode, the warm air heating device 2 is controlled so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 55 ℃.

In the charging heating mode, the water inlet temperature value of the battery 44 is not higher than 55 ℃, so that the battery 44 works in an optimal working temperature range, the waste heat of the hybrid electric vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

In this embodiment, the thermal management mode is a charge heating mode, in which the control of the respective components is:

2. Position of the electronically controlled three-way valve 24: 100% (fourth inlet 242 is in communication with third outlet 243);

3. position of electronically controlled five-way valve 35: the fifth inlet 351 communicates with the fourth outlet 352, and the sixth inlet 354 communicates with the fifth outlet 355;

4. duty ratio of the fourth electric water pump 42: 85% (maximum rotational speed).

High voltage PTC: the power of which is PID (i.e., proportional-integral-derivative closed-loop control algorithm) regulated according to the difference between the water temperature value of the battery 44 and 55 deg.c. When the water inlet temperature value of the battery 44 is more than or equal to 55 ℃, the power of the high-voltage PTC is reduced to 0; when the water entry temperature value of the battery 44 is less than or equal to 50 ℃, the high-voltage PTC resumes operation, and the power output is calculated according to the PID model. The high-voltage PTC can control the change of the water inlet temperature value of the battery 44 according to the PID model, so that severe fluctuation of water temperature is avoided, and the high-voltage PTC is prevented from being started and stopped frequently.

Second electric water pump 22: the duty cycle of which corresponds linearly to the power of the high voltage PTC. When the high-voltage PTC is at maximum power, the second electric water pump 22 corresponds to maximum rotation speed, and when the power of the high-voltage PTC is 0, the second electric water pump 22 corresponds to 30% rotation speed. The linear control of the water pump can save energy consumption. When the high-voltage PTC heating power is low, the heat of the high-voltage PTC heating can be brought to the heat exchanger 43 to heat the battery 44 by using smaller water flow; when the high voltage PTC is deactivated and the charge heating mode is not exited, it is indicated that the cell temperature value of the battery 44 has not yet been heated to a temperature that satisfies the preset cell temperature condition, but the water entry temperature value of the battery 44 is greater than the preset limit threshold. If the second electric water pump 22 is shut down at this time, the heat of the water in the high-voltage PTC circuit cannot exchange heat with the battery 44, and the heat is dissipated in the air to be wasted.

The rest of the parts are controlled by default or other mode-demanded positions. When the charge heating mode exits, the various components return to the default mode.

In some embodiments, the at least one key information includes a maximum temperature value of the battery 44.

The control device 5 is configured to determine a thermal management mode based on the detected at least one key information associated with the battery 44, comprising: determining that the thermal management mode is a driving heating mode when the maximum temperature value of the battery 44 is detected to be less than or equal to 25 ℃; when the maximum temperature value of the battery 44 is detected to be 28 ℃ or higher, the thermal management mode is determined to be the non-running heating mode.

The thermal management mode of this embodiment is a drive heating mode.

The non-driving heating mode refers to any thermal management mode except the driving heating mode.

Accordingly, the control device 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the thermal management mode, to operate the battery 44 in the battery cooling device 4 within a preset operating temperature value range, including: in the running heating mode, at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3 and the battery cooling device 4 is controlled so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃.

In the driving heating mode, the water inlet temperature value of the battery 44 is not higher than 45 ℃, so that the battery 44 works in an optimal working temperature range, the waste heat of the hybrid electric vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

In the drive heating mode, there are 5 heating strategies: a first heating strategy, a second heating strategy, a third heating strategy, a fourth heating strategy, and a fifth heating strategy.

In some specific embodiments, the controlling means 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the driving heating mode, so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃, and includes: in the driving heating mode, when the hybrid power vehicle is detected to be in a stable driving state and a heating request of a passenger cabin is obtained, determining heating power required by the passenger cabin; when the heating power is greater than a preset heating power threshold, the battery 44 in the battery cooling device 4 is heated using the first heating strategy.

Wherein, the first heating strategy refers to a strategy of utilizing the waste heat of the motor assembly 31 in the motor cooling device 3 to enable the water inlet temperature value of the battery 44 not to exceed 45 ℃.

The steady running state is compared with the starting state. In the steady running state, the hybrid vehicle runs on the electric quantity of the battery 44.

The heating power required for the passenger compartment is preset.

The heating request is issued by the passenger compartment.

Under the first heating strategy, the control of each component is as follows:

1. position of electronically controlled five-way valve 35: the fifth inlet 351 communicates with the fifth outlet 355, and the fourth outlet 352 communicates with the sixth inlet 354;

2. the duty cycle requirements of the third electric water pump 32 and the fourth electric water pump 42 are consistent;

the temperature difference value between the water temperature value of the motor assembly 31 and the maximum temperature value of the battery 44 is controlled, and the larger the temperature difference value is; the higher the rotation speeds of the third electric water pump 32 and the fourth electric water pump 42 are, the smaller the temperature difference is, and the lower the rotation speeds of the third electric water pump 32 and the fourth electric water pump 42 are; because the third electric water pump 32 and the fourth electric water pump 42 are connected in series in the water path under the strategy, if the rotating speed requirements of the two electric water pumps are inconsistent, the situation that one electric water pump counteracts part of the power of the other electric water pump can occur, so that energy loss is caused; the larger the temperature difference value is, the stronger the heat absorbing capacity of the battery 44 is, the electric water pump can play a role only when providing a large flow, the smaller the temperature difference value is, the weaker the heat absorbing capacity of the battery 44 is, and the electric water pump runs in a high power mode instead of wasting electric energy; the rotating speed of the electric water pump is controlled according to the temperature difference, so that energy sources are saved, and energy waste is avoided;

3. Position of the electronically controlled three-way valve 24: opening 0% (i.e., the third inlet 241 is in communication with the third outlet 243);

4. the heat exchanger 43 does not exchange heat with the warm air heating device 2.

5. The working states of the other parts are controlled according to other strategy requirements.

In some specific embodiments, the controlling means 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the driving heating mode, so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃, and includes: in the running heating mode, when it is detected that the hybrid vehicle is in a stationary running state and a heating request of the passenger compartment is not obtained, a maximum temperature value of the battery 44 is detected; heating the battery 44 using a second heating strategy or a third heating strategy when the maximum temperature value is less than or equal to 0 ℃; when the maximum temperature value is greater than 0 ℃, the battery 44 is heated using the first heating strategy.

Wherein the second heating strategy is a first strategy for making the water temperature value of the battery 44 not more than 45 ℃ by using the residual heat of the high-voltage PTC in the warm air heating device 2; the third heating strategy is a second strategy for making the water temperature value of the battery 44 not higher than 45 ℃ by using the residual heat of the high-voltage PTC in the warm air heating device 2;

In this particular embodiment, the passenger compartment does not issue a heating request.

Under the second heating strategy, the control of each component is as follows:

1. high voltage PTC: PID adjustment is carried out on the difference value between the water inlet temperature value of the battery 44 and the target water temperature value of 45 ℃ to output the power of the high-voltage PTC; PID limits the maximum power and the minimum power of the high-voltage PTC, limits the water inlet temperature value of the battery 44 to be in the range of 45+/-1 ℃, namely, achieves the aim, and avoids frequent fluctuation of the high-voltage PTC power to cause overshoot;

2. second electric water pump 22: the flow of the warm air heating device 2 is kept at 10L/min according to a certain duty ratio control, so that heat generated by the high-pressure PTC can be taken away;

3. fourth electric water pump 42: operating at maximum power, allowing the battery 44 to absorb the maximum heat released by the high voltage PTC;

4. position of the electronically controlled three-way valve 24: 100% (i.e., the fourth inlet 242 is in communication with the third outlet 243) so that heat generated by the warm air heating device 2 is exchanged to the battery cooling device 4 through the heat exchanger 43.

5. Electronically controlled five-way valve 35: the sixth inlet 354 is in communication with the fifth outlet 355, the fifth inlet 351 is in communication with the fourth outlet 352 or with the multi-function interface 353, and the heat dissipation requirement of the motor cooling device 3 is determined: when the water temperature value of the motor assembly 31 is less than 40 ℃, the fifth inlet 351 of the electric control five-way valve 35 is communicated with the fourth outlet 352, and when the water temperature value of the motor assembly 31 is more than or equal to 42 ℃, the fifth inlet 351 of the electric control five-way valve 35 is communicated with the multifunctional interface 353, and the motor assembly 31 radiates heat through the motor radiator 34;

6. Position of electronically controlled four-way valve 16: 0% (i.e., the first outlet 161 is communicated with the first inlet 162, and the second outlet 163 is communicated with the second inlet 164), so that heat of the warm air heating device 2 is prevented from leaking into the engine cooling device 1;

7. the working states of the other parts are controlled according to other strategy requirements.

Under a third heating strategy, the control of the various components is:

1. high voltage PTC: PID adjustment is carried out on the difference value between the actual water temperature value of the inlet of the warm air core 23 and the target water temperature value of 85 ℃ to output the power of the high-voltage PTC; PID limits the maximum power and the minimum power of the high-voltage PTC, limits the water inlet temperature value of the battery 44 to be in the range of 85+/-1 ℃, namely, achieves the aim, and avoids frequent fluctuation of the high-voltage PTC power to cause overshoot;

2. position of the electronically controlled three-way valve 24: the temperature value of the battery 44 is regulated according to the water inlet temperature value of the battery 44, when the water inlet temperature value of the battery 44 is less than or equal to 45 ℃, the opening degree of the electric control three-way valve 24 is 100% (namely, the fourth inlet 242 is communicated with the third outlet 243), so that the heat of the warm air heating device 2 is exchanged to the battery cooling device 4 through the heat exchanger 43; when the water inlet temperature value of the battery 44 is more than or equal to 48 ℃, the opening of the electric control three-way valve 24 is 0% (namely the third inlet 241 is communicated with the third outlet 243), and the heat of the warm air heating device 2 is not transmitted through the heat exchanger 43 any more, namely the battery 44 is not heated any more;

3. The cooling liquid heated by the high-pressure PTC is firstly conveyed to the passenger cabin through the warm air core 23, so that the heating requirement of passengers can be preferentially ensured; meanwhile, after the passenger cabin radiates heat, the temperature of the cooling liquid is reduced, so that the requirement that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃ can be met;

4. the second electric water pump 22 works according to the maximum power, and can fully bring the heat emitted by the high-voltage PTC to the warm air core 23;

5. the fourth electric water pump 42 is controlled in the same manner as the second heating strategy;

6. the control mode of the electric control five-way valve 35 is the same as that of the second heating strategy;

7. the control mode of the electric control four-way water valve is the same as that of the second heating strategy;

8. the working states of the other parts are controlled according to other strategy requirements.

In some specific embodiments, the controlling means 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the driving heating mode, so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃, and includes: in the driving heating mode, when the hybrid power vehicle is detected to be in a starting state and a heating request of the passenger cabin is obtained, detecting an air outlet temperature value of the passenger cabin; detecting the heat of the engine 11 when the temperature value of the air outlet meets the preset temperature value condition; when the engine 11 heat satisfies a preset heat condition, the battery 44 is heated using a fourth heating strategy.

Wherein the fourth heating strategy refers to a strategy of using the residual heat of the engine 11 in the engine cooling device 1 to make the water temperature value of the battery 44 not more than 45 ℃.

The start state is compared with the steady running state. In the start state, the engine 11 generates power and the motor assembly 31 drives the hybrid vehicle to travel.

Under the fourth heating strategy, the control of each component is:

1. the control mode of the second electric water pump 22 is the same as that of the second heating strategy;

2. position of the electric control four-way water valve: 100% (i.e., the first outlet 161 is communicated with the second inlet 164, the first inlet 162 is communicated with the second outlet 163), so that the waste heat of the engine 11 in the engine cooling device 1 is transferred to the warm air heating device 2, and then the heat is transferred to the battery 44 through the heat exchanger 43;

3. the control mode of the electric control three-way water valve is the same as that of the third heating strategy;

4. the control mode of the electric control five-way water valve is the same as that of the second heating strategy;

6. the opening degree of the thermal management module 13 (i.e., TMM) is closed-loop controlled according to the target water temperature value; when the water temperature value of the engine 11 exceeds the target water temperature value, the TMM opening is increased, and when the water temperature value of the engine 11 is lower than the target water temperature value, the TMM opening is decreased; the target water temperature value is an optimal working temperature value of the engine 11 calibrated according to the rotating speed and the load of the engine 11;

7. The rotation speed of the first electric water pump 12 is controlled in a closed loop mode according to the water temperature value of the engine 11, the higher the water temperature value of the engine 11 is, the higher the rotation speed of the first electric water pump 12 is, the highest rotation speed of the first electric water pump 12 is limited to be 5000 revolutions, and the service life of the first electric water pump 12 can be influenced when the rotation speed exceeds 5000 revolutions;

8. the fan rotation speed of the engine 11 is controlled in accordance with the water temperature value of the engine 11 and the opening degree of TMM, where X represents the water temperature value of the engine 11 and Y represents the opening degree of TMM:

9. the working states of other parts are controlled according to other strategy requirements.

In other embodiments, the control device 5 is further configured to:

when the temperature value of the air outlet does not meet the preset temperature value condition, the battery 44 is heated by adopting the first heating strategy.

In other embodiments, the control device 5 is further configured to: in the running heating mode, when the heat of the engine 11 does not satisfy a preset heat condition, a maximum temperature value of the battery 44 is detected; heating the battery 44 using a fifth heating strategy when the maximum temperature value is less than or equal to 0 ℃; when the maximum temperature value is greater than 0 ℃, the battery 44 is heated using the first heating strategy.

The fifth heating strategy is a strategy for making the water temperature value of the battery 44 not higher than 45 ℃ by using the residual heat of the engine 11 in the engine cooling device 1 and the residual heat of the high-voltage PTC in the warm air heating device 2.

Under a fifth heating strategy, the control of the individual components is:

1. the control mode of the first electric water pump 12 is the same as that of the fourth heating strategy;

2. the opening degree of the thermal management module 13 is controlled in the same manner as the fourth heating strategy;

3. the control mode of the electric control four-way valve 16 is the same as that of the fourth heating strategy;

4. the control mode of the high-voltage PTC power is the same as that of the third heating strategy;

5. the control mode of the second electric water pump 22 is the same as the third heating strategy;

6. the control mode of the electric control three-way valve 24 is the same as the third heating strategy;

7. the fourth electric water pump 42 is controlled in the same manner as the second heating strategy;

8. the control mode of the electric control five-way valve 35 is the same as that of the second heating strategy;

9. the working states of the other parts are controlled according to other strategy requirements.

In other embodiments, the control device 5 is further configured to: in the driving heating mode, when it is detected that the hybrid vehicle is in a start state and a heating request of the passenger compartment is not obtained, the battery 44 is heated using the fourth heating strategy.

In the embodiment of the present application, when the hybrid vehicle is driving, the control device 5 always determines the heating strategy in the driving heating mode, and the fourth heating strategy has a higher priority than the first heating strategy, and if the hybrid vehicle satisfies the condition of the fourth heating strategy in the first heating strategy, the control device will directly switch to the fourth heating strategy.

The fan rotational speed of the engine 11 is related to the water temperature value of the motor assembly 31 in addition to the water temperature value of the engine 11. When the water temperature value of the motor assembly 31 exceeds 45 ℃, the fan of the engine 11 is operated at a duty cycle of 30%; when the water temperature of the motor assembly 31 reaches 65 c, the fan of the engine 11 is operated at 85% duty cycle, with a linear difference in the middle region. Finally, the fan duty cycle of the engine 11 is maximized according to the requirements of the motor assembly 31 and the engine 11.

In some embodiments, the at least one key information comprises: a battery temperature value of the battery 44, an ambient temperature value, and a water temperature value of the motor assembly 31.

The control device 5 is configured to determine a thermal management mode based on the detected at least one key information associated with the battery 44, comprising: when it is detected that the battery temperature value of the battery 44 is greater than or equal to 35 ℃, and the ambient temperature value is less than or equal to 25 ℃, and the water temperature value of the motor assembly 31 is less than or equal to the battery temperature value, determining that the thermal management mode is a radiator cooling mode; the thermal management mode is determined to be a non-radiator cooling mode when a battery temperature value of the battery 44 is detected to be less than or equal to 32 ℃, or the ambient temperature value is greater than or equal to 28 ℃, or a water temperature value of the motor assembly 31 is greater than the battery temperature value.

In this particular embodiment, the cooling mode includes a radiator cooling mode.

The non-radiator cooling mode refers to any thermal management mode other than the radiator cooling mode.

Accordingly, the control device 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the thermal management mode, to operate the battery 44 in the battery cooling device 4 within a preset operating temperature value range, including: in the radiator cooling mode, the battery cooling apparatus 4 and the motor cooling apparatus 3 are controlled so that the water inlet temperature value of the battery 44 in the battery cooling apparatus 4 does not exceed 45 ℃.

In the radiator cooling mode, when the temperature of the battery 44 is low, only each electric water pump is required to be operated, and the battery 44 is cooled by using cooling liquid; the battery 44 is cooled by the motor radiator 34 when the temperature of the battery 44 is slightly high. The radiator cooling mode can delay the time for the battery 44 to enter the forced cooling mode, reducing power consumption.

In the radiator cooling mode, the control of each component is:

1. position of electronically controlled five-way valve 35: the fifth inlet 351 is communicated with the multifunctional interface 353, the sixth inlet 354 is communicated with the fifth outlet 355, and the battery cooling device 4 is connected with the motor radiator 34 in series for cooling;

2. The duty cycles of the third electric water pump 32 and the fourth electric water pump 42 are each operated at 85% duty cycle; the temperature difference value between the water temperature value of the motor assembly 31 and the maximum temperature value of the battery 44 is controlled, and the larger the temperature difference value is; the higher the rotation speeds of the third electric water pump 32 and the fourth electric water pump 42 are, the smaller the temperature difference is, and the lower the rotation speeds of the third electric water pump 32 and the fourth electric water pump 42 are; because the third electric water pump 32 and the fourth electric water pump 42 are connected in series in the water path under the strategy, if the rotating speed requirements of the two electric water pumps are inconsistent, the situation that one electric water pump counteracts part of the power of the other electric water pump can occur, so that energy loss is caused; the larger the temperature difference value is, the stronger the heat absorbing capacity of the battery 44 is, the electric water pump can play a role only when providing a large flow, the smaller the temperature difference value is, the weaker the heat absorbing capacity of the battery 44 is, and the electric water pump runs in a high power mode instead of wasting electric energy; the rotating speed of the electric water pump is controlled according to the temperature difference, so that energy sources are saved, and energy waste is avoided;

3. position of the electronically controlled three-way valve 24: opening 0% (i.e., the third inlet 241 is conducted with the third outlet 243), the heat exchanger 43 does not exchange heat with the warm air heating device 2;

4. the operating states of the remaining components are controlled according to other mode requirements.

In other embodiments, the at least one key information includes a battery temperature value of the battery 44.

The control device 5 is configured to determine a thermal management mode based on the detected at least one key information associated with the battery 44, comprising: determining that the thermal management mode is a forced cooling mode when a battery temperature value of the battery 44 is detected to be greater than or equal to 39 ℃; when the battery temperature value of the battery 44 is detected to be less than or equal to 35 ℃, the thermal management mode is determined to be the non-forced cooling mode.

In this particular embodiment, the cooling mode further includes a forced cooling mode.

The non-forced cooling mode refers to any thermal management mode other than the forced cooling mode.

Accordingly, the control device 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the thermal management mode, to operate the battery 44 in the battery cooling device 4 within a preset operating temperature value range, including: in the forced cooling mode, the battery cooling device 4 and the motor cooling device 3 are controlled so that the water inlet temperature value of the battery 44 in the battery cooling device 4 does not exceed 45 ℃.

In the forced cooling mode, the control of the respective components is:

1. electronically controlled five-way valve 35: the sixth inlet 354 is communicated with the fifth outlet 355, the fifth inlet 351 is communicated with the fourth outlet 352 or is communicated with the multifunctional interface 353, and the heat dissipation requirement of the motor cooling device 3 is required; when the water temperature value of the motor assembly 31 is less than 40 ℃, the fifth inlet 351 and the fourth outlet 352 of the electric control five-way valve 35 are communicated; when the water temperature value of the motor assembly 31 is more than or equal to 42 ℃, the fifth inlet 351 of the electric control five-way valve 35 is communicated with the multifunctional interface 353, and the motor assembly 31 radiates heat through the motor radiator 34;

2. fourth electric water pump 42: operating at 85% duty cycle, allowing battery 44 to cool as quickly as possible;

In other embodiments, the at least one key information includes a water temperature value of the motor assembly 31 in the motor cooling device 3.

The control device 5 is configured to determine a thermal management mode based on the detected at least one key information associated with the battery 44, comprising: when the water temperature value of the motor assembly 31 in the motor cooling device 3 is detected to be more than or equal to 42 ℃, determining that the thermal management mode is a motor cooling mode; when the water temperature value of the motor assembly 31 in the motor cooling device 3 is detected to be less than or equal to 40 ℃, the thermal management mode is determined to be a non-motor cooling mode.

In this particular embodiment, the cooling mode further includes a motor cooling mode.

The non-motor cooling mode refers to any thermal management mode other than the motor cooling mode.

Accordingly, the control device 5 is configured to control at least one of the engine cooling device 1, the warm air heating device 2, the motor cooling device 3, and the battery cooling device 4 in the thermal management mode, to operate the battery 44 in the battery cooling device 4 within a preset operating temperature value range, including: in the motor cooling mode, the motor cooling device 3 is controlled to radiate heat from the motor.

In the motor cooling mode, the control of the individual components is:

1. electronically controlled five-way valve 35: the sixth inlet 354 is in communication with the fifth outlet 355; the five-way water valve 1-3 is communicated,

2. the duty ratio of the third electric water pump 32 is linearly adjusted according to the water temperature value of the motor assembly 31, when the water temperature value of the motor assembly 31 is 42 ℃, the third electric water pump 32 is operated at 30% duty ratio, and when the water temperature value of the motor assembly 31 is not less than 55 ℃, the third electric water pump 32 is operated at 85% duty ratio.

The maximum rotation speed of the third electric water pump 32 is released before the maximum rotation speed of the fan of the engine 11, so that the thermal management system reaches the maximum water flow when the fan of the engine 11 reaches the maximum rotation speed, and the cooling liquid can bring all heat of the heating component out.

In addition, the cooling mode further includes an engine 11 cooling mode, the engine 11 cooling mode and the modes are not interfered with each other, and the thermal management system can enter two modes simultaneously.

The thermal management system of the hybrid vehicle of the embodiment of the application includes: an engine cooling device 1, a warm air heating device 2, a motor cooling device 3, a battery cooling device 4 and a control device 5. The engine cooling device 1, the warm air heating device 2, the motor cooling device 3 and the battery cooling device 4 are subjected to heat management through the control device 5, so that the engine 11, the motor assembly 31 and the battery 44 are always in a proper temperature range during the running process of the hybrid electric vehicle, the oil consumption of the engine 11 is reduced, and the driving range of the battery 44 is prolonged.

The control device 5 controls the opening degree of the thermal management module 13 in the engine cooling device 1 through closed loop feedback to maintain the water temperature value of the engine 11 within the range of 85-95 ℃; controlling the opening of an electric water pump on a water path according to the water temperature value of the engine 11, and selecting the waste heat of the engine 11 or the waste heat of a motor to heat the battery 44 so that the battery 44 is in an optimal working temperature range; through the control logic of closed loop linkage lean, the waste heat of the hybrid electric vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

The present application also provides a method embodiment for carrying out the system steps described in the above embodiment, and the explanation based on the same meaning of the names is the same as that of the above embodiment, which has the same technical effects as those of the above embodiment, and is not repeated here.

As shown in fig. 3, the present application provides a thermal management method of a hybrid vehicle, which is applied to a control device in a thermal management system as described above, comprising:

step S301 of determining a thermal management mode based on the detected at least one key information associated with the battery in the battery cooling device;

step S302, in the thermal management mode, controlling at least one device of an engine cooling device, a warm air heating device, a motor cooling device and a battery cooling device to enable a battery in the battery cooling device to work within a preset working temperature range.

Optionally, the method further comprises:

The thermal management method of the hybrid electric vehicle provided by the embodiment of the application carries out thermal management on the engine cooling device, the warm air heating device, the motor cooling device and the battery cooling device, so that the engine, the motor assembly and the battery of the hybrid electric vehicle are always in a proper temperature range in the running process, the oil consumption of the engine is reduced, and the driving mileage of the battery is prolonged.

The opening degree of a thermal management module in an engine cooling device is controlled through closed loop feedback, so that the water temperature value of the engine is maintained within the range of 85-95 ℃; controlling the opening of an electric water pump on a water path according to the water temperature value of the engine, and selecting the waste heat of the engine or the waste heat of the motor to heat the battery so that the battery is in an optimal working temperature range; through the control logic of closed loop linkage lean, the waste heat of the hybrid electric vehicle is effectively utilized, the energy consumption is reduced, and the energy is saved.

The present embodiment provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor to enable the at least one processor to perform the method steps described in the embodiments above.

Embodiments of the present application provide a non-transitory computer storage medium storing computer executable instructions that perform the method steps described in the embodiments above.

Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A thermal management system of a hybrid vehicle, comprising:

an engine cooling device including at least an engine;

2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,

the at least one key information includes a maximum temperature value of the battery and a state of charge operation of the battery;

3. The system of claim 1, wherein the system further comprises a controller configured to control the controller,

the at least one key information includes a maximum temperature value of the battery;

4. The system of claim 3, wherein the control device configured to control at least one of the engine cooling device, the warm air heating device, the motor cooling device, and the battery cooling device in the drive heating mode such that a water temperature value of a battery in the battery cooling device does not exceed 45 ℃, comprises:

5. The system of claim 4, wherein the control device configured to control at least one of the engine cooling device, the warm-air heating device, the motor cooling device, and the battery cooling device in the drive heating mode such that a water temperature value of a battery in the battery cooling device does not exceed 45 ℃, comprises:

6. The system of claim 4, wherein the control device configured to control at least one of the engine cooling device, the warm-air heating device, the motor cooling device, and the battery cooling device in the drive heating mode such that a water temperature value of a battery in the battery cooling device does not exceed 45 ℃, comprises:

7. The system of claim 6, wherein the control device is further configured to:

8. The system of claim 6, wherein the control device is further configured to:

9. The system of claim 6, wherein the control device is further configured to:

10. The system of claim 6, wherein the system further comprises a controller configured to control the controller,

The at least one key information includes: a battery temperature value of the battery, an ambient temperature value, and a water temperature value of the motor assembly;

11. The system of claim 6, wherein the system further comprises a controller configured to control the controller,

the at least one key information includes a battery temperature value of the battery;

12. The system of claim 6, wherein the system further comprises a controller configured to control the controller,

the at least one key information comprises a water temperature value of a motor assembly in the motor cooling device;

13. A thermal management method of a hybrid vehicle, applied to the control device in the thermal management system according to claim 1, characterized by comprising: