Method and apparatus for thermal management control of a vehicle

Abstract

The application belongs to the field of vehicles and discloses a method and device for thermal management control of a vehicle. The method comprises the following steps: obtaining a current thermal management parameter of a target vehicle, wherein the current thermal management parameter comprises a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger cabin air conditioner switch state; obtaining a current weight coefficient corresponding to the current thermal management parameter, and determining a current refrigeration mode of a power battery and a passenger cabin of the target vehicle according to the current thermal management parameter and the current weight coefficient; and performing refrigeration on the power battery and / or the passenger cabin of the target vehicle according to the current refrigeration mode. According to the application, the corresponding refrigeration mode can be determined for refrigeration according to the current thermal management parameter of the target vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a method and device for thermal management control of a vehicle. BACKGROUND

[0002] The high-temperature cooling circuit of the thermal management system of a hybrid vehicle functions to ensure that the engine coolant temperature is within a reasonable range. The maximum cooling performance of the high-temperature circuit of the thermal management system of a hybrid vehicle is currently selected and verified according to certain design standards, which may not cover 100% of the scenarios. Some scenarios may cause the cooling performance of the high-temperature circuit of the thermal management system to be insufficient, and the engine coolant temperature may alarm. When the engine coolant temperature is too high, the expansion tank may burst. Therefore, there is an urgent need for a method for thermal management control of a vehicle to reduce the engine coolant temperature. SUMMARY

[0003] Therefore, it is necessary to provide a method and device for thermal management control of a vehicle to solve the technical problem of how to reduce the engine coolant temperature.

[0004] In a first aspect, a method for thermal management control of a vehicle is provided, the method comprising:

[0005] obtaining a current thermal management parameter of a target vehicle, wherein the current thermal management parameter comprises a current battery body temperature, a current battery inlet water temperature, a current engine coolant temperature, a current ambient temperature, a current charging mode, and a current passenger cabin air conditioning switch state;

[0006] obtaining a current weight coefficient corresponding to the current thermal management parameter, and determining a current refrigeration mode of a power battery and a passenger cabin of the target vehicle according to the current thermal management parameter and the current weight coefficient;

[0007] refrigerating the power battery and / or the passenger cabin of the target vehicle according to the current refrigeration mode.

[0008] As an optional implementation, the obtaining of the current weight coefficient corresponding to the current thermal management parameter comprises:

[0009] determining the current weight coefficient of each current thermal management parameter according to the current thermal management parameter and a hierarchical level of the thermal management parameter; or

[0010] determining the current weight coefficient of each current thermal management parameter according to a ratio of the current thermal management parameter to a preset critical parameter, and a hierarchical level of the thermal management parameter.

[0011] As an optional implementation, the determining of the current weight coefficient of each current thermal management parameter according to the current thermal management parameter and the hierarchical level of the thermal management parameter comprises:

[0012] The thermal management parameters comprise a battery body temperature, a battery water inlet temperature, an engine coolant temperature, an ambient temperature, a charging mode and a passenger cabin air conditioner switch state;

[0013] The battery body temperature, the battery water inlet temperature, the engine coolant temperature and the ambient temperature are respectively layered according to numerical values to obtain a plurality of hierarchical levels corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature and the ambient temperature;

[0014] The charging mode comprises different charging modes, and different charging modes correspond to different hierarchical levels;

[0015] The passenger cabin air conditioner switch state comprises different switch states, and different switch states correspond to different hierarchical levels;

[0016] The weight coefficients corresponding to each hierarchical level are determined, wherein different hierarchical levels of each thermal management parameter correspond to different weight coefficients, and the sum of the weight coefficients of each hierarchical level of each thermal management parameter is equal;

[0017] The current hierarchical level in which the current thermal management parameter is located is determined according to the hierarchical level of the thermal management parameter, and the current weight coefficient corresponding to the current thermal management parameter is determined according to the weight coefficient corresponding to each hierarchical level.

[0018] As an optional implementation, the determining of the current weight coefficient of each current thermal management parameter according to the current thermal management parameter and the hierarchical level of the thermal management parameter comprises:

[0019] The thermal management parameters comprise a battery body temperature, a battery water inlet temperature, an engine coolant temperature, an ambient temperature, a charging mode and a passenger cabin air conditioner switch state;

[0020] The current weight coefficient corresponding to the current battery body temperature is a ratio of the current battery body temperature to a preset critical battery body temperature;

[0021] The current weight coefficient corresponding to the current battery water inlet temperature is a ratio of the current battery water inlet temperature to a preset critical battery water inlet temperature;

[0022] The current weight coefficient corresponding to the current engine coolant temperature is a ratio of the current engine coolant temperature to a preset critical engine coolant temperature;

[0023] The current weight coefficient corresponding to the current ambient temperature is a ratio of the current ambient temperature to a preset critical ambient temperature.

[0024] The charging mode includes different charging modes, and different charging modes correspond to different hierarchical levels.

[0025] The passenger compartment air conditioner switch state includes different switch states, and different switch states correspond to different hierarchical levels.

[0026] Determine the weight coefficient corresponding to each hierarchical level of the charging mode and the passenger compartment air conditioner switch state, wherein different hierarchical levels of the charging mode and the passenger compartment air conditioner switch state correspond to different weight coefficients, and the sum of the weight coefficients of the charging mode is equal to the sum of the weight coefficients of the passenger compartment air conditioner switch state.

[0027] According to the current charging mode and the current passenger compartment air conditioner switch state, determine the current weight coefficient corresponding to the current charging mode and the current passenger compartment air conditioner switch state.

[0028] As an optional implementation, the current thermal management parameter and the current weight coefficient are determined, including,

[0029] Compare the current weight coefficient corresponding to the current thermal management parameter with the weight coefficient of each refrigeration mode stored in advance, and determine the refrigeration mode corresponding to the current weight coefficient as the current refrigeration mode for the power battery and the passenger compartment of the target vehicle.

[0030] As an optional implementation, the current thermal management parameter and the current weight coefficient are determined, including,

[0031] When the current weight coefficient of the current battery body temperature is a first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a second preset engine coolant temperature coefficient or a third preset engine coolant temperature coefficient, the current weight coefficient of the current ambient temperature is a first preset ambient temperature coefficient, the current weight coefficient of the current charging mode is a first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is a first preset passenger compartment air conditioner switch state coefficient, the target vehicle is controlled not to cool the power battery and the passenger compartment of the target vehicle.

[0032] when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle passenger compartment is cooled;

[0033] when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or the second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle power battery and passenger compartment are cooled at the same time, and the cooling capacity of the passenger compartment is greater than that of the power battery;

[0034] when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle power battery and passenger compartment are cooled at the same time, and the cooling capacity of the power battery is greater than that of the passenger compartment;

[0035] the current weight coefficient of the current battery body temperature meets the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature meets the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature meets the first preset engine coolant temperature coefficient, the second preset engine coolant temperature coefficient or the third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature meets the first preset environment temperature coefficient, the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode meets the first preset charging mode coefficient or the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state meets the first preset passenger compartment air conditioning switch state coefficient, the power battery of the target vehicle is cooled.

[0036] As an optional implementation, the method further comprises:

[0037] During driving of the target vehicle in the pure electric mode or the hybrid mode, the motor temperature of the target vehicle is acquired.

[0038] When it is detected that the motor temperature is greater than or equal to a first preset motor temperature threshold and less than a second preset motor temperature threshold, the output power of the motor module is limited according to a preset proportion coefficient, the current speed of the target vehicle is limited to be less than a preset speed threshold, and the target vehicle is controlled to stop running when the current state of charge SOC of the power battery of the target vehicle is zero.

[0039] When it is detected that the motor temperature is greater than or equal to the second preset motor temperature threshold, the target vehicle is controlled to stop running.

[0040] As an optional implementation, the method further comprises:

[0041] During driving of the target vehicle in the fuel mode or the hybrid mode, when it is detected that the engine coolant temperature is greater than or equal to the first preset engine temperature threshold and less than a second preset engine temperature threshold, the air conditioner of the passenger compartment is controlled to be turned off.

[0042] When it is detected that the engine coolant temperature is greater than or equal to the second preset engine temperature threshold and the duration reaches a preset duration threshold, the engine of the target vehicle is controlled to stop running, the electronic water pump and the electronic fan are controlled to operate at maximum power, and the target vehicle is controlled to drive in the pure electric mode.

[0043] As an optional implementation, after the target vehicle is controlled to drive in the pure electric mode, the method further comprises:

[0044] starting an engine of the target vehicle, and controlling the target vehicle to exit the pure electric mode, if the engine coolant temperature is less than a third preset engine temperature threshold during the pure electric mode, wherein the third preset engine temperature threshold is less than the first preset engine temperature threshold;

[0045] determining whether a current state of charge (SOC) of a power battery of the target vehicle is less than a preset state of charge, if the engine coolant temperature is greater than or equal to the third preset engine temperature threshold during the pure electric mode, and limiting a speed of the target vehicle to be less than a preset speed, if the current SOC is less than the preset state of charge, until the current SOC of the power battery of the target vehicle is zero, and controlling the target vehicle to stop running.

[0046] In a second aspect, a device for thermal management control of a vehicle is provided, and the device comprises:

[0047] a first obtaining module configured to obtain a current thermal management parameter of a target vehicle, wherein the current thermal management parameter comprises a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode, and a current passenger cabin air conditioner switch state;

[0048] a determining module configured to obtain a current weight coefficient corresponding to the current thermal management parameter, and determine a current refrigeration mode of a power battery and a passenger cabin of the target vehicle according to the current thermal management parameter and the current weight coefficient;

[0049] a refrigeration module configured to refrigerate the power battery and / or the passenger cabin of the target vehicle according to the current refrigeration mode.

[0050] The power source of the air conditioner of the hybrid vehicle is the engine and the power battery, so if the engine coolant temperature needs to be cooled, the cooling mode of the air conditioner can be adjusted, the cooling capacity of the air conditioner is reduced, and the engine coolant temperature is reduced. The cooling capacity of the air conditioner is used for cooling the passenger compartment of the target vehicle and cooling the power battery, so the cooling mode of the passenger compartment and the power battery can be adjusted according to the thermal management parameters of the vehicle to cool the engine coolant temperature. The application provides a method for controlling the thermal management of a vehicle, and the embodiments of the application provide at least the following beneficial effects: based on the thermal management parameters of the target vehicle, the thermal management parameters are hierarchically classified and graded, and different weight coefficients are set correspondingly. Then, based on the current thermal management parameters of the target vehicle, the corresponding current cooling mode is determined to cool the power battery and / or the passenger compartment. In this way, the cooling mode of the air conditioner can be adjusted based on the current thermal management parameters, the cooling capacity of the power battery and the passenger compartment can be balanced, and if necessary, the cooling comfort of the passenger compartment can be sacrificed to reduce the cooling demand and reduce the cooling capacity of the air conditioner, thereby reducing the power supply of the engine that provides power to the air conditioner. After the engine power supply is reduced, the engine coolant temperature will be reduced, thereby avoiding the possibility of engine coolant overheat causing the expansion tank to burst. To prevent the engine coolant from being too high to cause the expansion tank to burst in the scenario of exceeding the design working condition, the thermal management control strategy is optimized to more directly prompt the user or sacrifice part of the driving performance and the comfort of the passenger compartment to reduce the failure level of the vehicle.

[0051] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0053] Figure 1 A structural schematic diagram of a vehicle thermal management control system provided by an embodiment of the application;

[0054] Figure 2 A flowchart of a vehicle thermal management control method provided by an embodiment of the application;

[0055] Figure 3 A flowchart of an example of a vehicle thermal management control method provided by an embodiment of the application;

[0056] Figure 4 A structural schematic diagram of a device for thermal management control of a vehicle is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the purposes, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0058] The method for thermal management control of a vehicle provided by the embodiments of the present application can be applied to a system for thermal management control of a vehicle. As shown in the figure, the system for thermal management control of a vehicle includes a controller 101, a power battery 102 and a refrigeration device 103. The controller 101 is connected to the power battery 102 and the refrigeration device 103 respectively, and the power battery 102 is connected to the refrigeration device 103. Figure 1

[0059] The controller 101 is configured to acquire a current thermal management parameter of a target vehicle, wherein the current thermal management parameter includes a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger compartment air conditioner switch state. A current weight coefficient corresponding to the current thermal management parameter is acquired, and a current refrigeration mode of the power battery 102 and the passenger compartment of the target vehicle is determined according to the current thermal management parameter and the current weight coefficient. According to the current refrigeration mode, the power battery 102 and / or the passenger compartment of the target vehicle is refrigerated by the refrigeration device 103.

[0060] The power battery 102 is configured to provide power for the target vehicle to drive the target vehicle to travel.

[0061] The refrigeration device 103 is configured to receive an instruction of the controller 101 to refrigerate the power battery 102 or the passenger compartment.

[0062] Next, a method for thermal management control of a vehicle provided by the embodiments of the present application will be described in detail in combination with the specific embodiments, Figure 2 A flow chart of a method for thermal management control of a vehicle provided by the embodiments of the present application is shown in the figure, and the specific steps are as follows: Figure 2

[0063] In step 201, a current thermal management parameter of a target vehicle is acquired, wherein the current thermal management parameter includes a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger compartment air conditioner switch state.

[0064] ​​In implementation, the role of the high-temperature cooling circuit of the thermal management system of the hybrid vehicle is to ensure that the engine coolant temperature is within a reasonable range. Currently, the maximum cooling performance of the high-temperature circuit of the thermal management system of the hybrid vehicle is selected and verified according to certain design standards, which may not cover 100% of the scenarios. Some scenarios may cause the cooling performance of the high-temperature circuit of the thermal management system to be insufficient, and the engine coolant temperature may alarm. When the engine coolant is too high, it may cause the expansion tank to burst. The power source of the air conditioner of the hybrid vehicle is the engine and the power battery. The more refrigeration capacity the air conditioner produces, the more energy the engine and the power battery need to supply to the air conditioner. The more energy the engine supplies, the higher the engine coolant temperature. Therefore, the engine coolant and the air conditioner control can be associated. To reduce the engine coolant temperature, the refrigeration mode of the air conditioner can be adjusted to reduce the refrigeration capacity of the air conditioner to reduce the engine coolant temperature. Therefore, when the engine coolant temperature of the hybrid vehicle is to be reduced, the refrigeration capacity of the air conditioner can be reduced to achieve this. At the same time, the refrigeration capacity of the air conditioner is used for refrigeration of the passenger compartment of the target vehicle and refrigeration of the power battery. When the temperature of the power battery is high, it may cause damage to the power battery, thereby affecting the driving of the target vehicle in pure electric mode or hybrid mode. The refrigeration of the passenger compartment is the pursuit of user comfort, so to reduce the refrigeration capacity of the air conditioner, the refrigeration capacity of the power battery and the passenger compartment needs to be balanced, and if necessary, the refrigeration comfort of the passenger compartment can be sacrificed to reduce the refrigeration demand, thereby reducing the engine coolant temperature.

[0065] The relevant temperature of the power battery is the battery body temperature and the battery water inlet temperature. The battery body temperature is the temperature of the body of the power battery, which has its own cooling demand. When the temperature of the body of the power battery exceeds the preset normal working temperature, the higher the temperature, the more refrigeration capacity is needed. The temperature of the power battery is lowered by the water inlet temperature, so the cooling principle of the battery water inlet temperature is similar to that of the battery body temperature of the power battery. The battery body temperature of the power battery is different under different charging modes. Therefore, when determining whether the power battery needs to be cooled, the current battery body temperature, the current battery water inlet temperature, and the current charging mode need to be obtained.

[0066] When determining whether the passenger compartment needs refrigeration capacity, it can be determined according to the high and low of the ambient temperature. The higher the ambient temperature, the greater the demand for refrigeration capacity of the passenger compartment. When the passenger compartment air conditioner switch state is in the open state, the passenger compartment is refrigerated; when the passenger compartment air conditioner switch state is in the open state, the passenger compartment is not refrigerated. Therefore, when determining whether the passenger compartment needs to be refrigerated, the current ambient temperature and the current passenger compartment air conditioner switch state need to be obtained.

[0067] Therefore, the current thermal management parameters of the target vehicle are acquired first, wherein the current thermal management parameters include a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger cabin air conditioning switch state. Then, the current cooling mode of the power battery and the passenger cabin of the target vehicle can be determined according to the current thermal management parameters.

[0068] In step 202, the current weight coefficient corresponding to the current thermal management parameters is acquired, and the current cooling mode of the power battery and the passenger cabin of the target vehicle is determined according to the current thermal management parameters and the current weight coefficient.

[0069] In implementation, the current thermal management parameters of the target vehicle are acquired, and the current weight coefficient corresponding to the current thermal management parameters can be queried in the pre-stored hierarchical levels of thermal management parameters according to the current thermal management parameters of the target vehicle. The pre-stored hierarchical levels of thermal management parameters can be a correspondence table of thermal management parameters, hierarchical levels and weight coefficients. Thus, the current weight coefficient of the current thermal management parameters is determined according to the current thermal management parameters. Then, the current cooling mode corresponding to the current weight coefficient is queried in the pre-stored cooling mode of thermal management according to the current weight coefficient of the current thermal management parameters. The pre-stored cooling mode of thermal management is a correspondence of thermal management parameters, weight coefficients and cooling modes, and different cooling modes correspond to different weight coefficients of different thermal management parameters. The current cooling mode corresponding to the current thermal management parameters can also be obtained by comparing the current weight coefficient of the current thermal management parameters with each weight coefficient in each cooling mode one by one. Therefore, the current cooling mode of the power battery and the passenger cabin of the target vehicle is determined according to the current thermal management parameters and the current weight coefficient.

[0070] Specifically, the specific process of step 202 is as follows:

[0071] Step one, the current weight coefficient of each current thermal management parameter is determined according to the current thermal management parameters and the hierarchical levels of thermal management parameters.

[0072] In implementation, since the pre-stored hierarchical levels of thermal management parameters can be a correspondence table of thermal management parameters, hierarchical levels and weight coefficients, the current weight coefficient of the current thermal management parameters can be determined according to the current thermal management parameters and the pre-stored hierarchical levels of thermal management parameters.

[0073] Specifically, the process of step one is as follows:

[0074] Step 1), according to the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the ambient temperature, the different charging modes corresponding to the different charging modes, and the different air conditioning switch states corresponding to the passenger cabin air conditioning switch states, the thermal management parameters are layered respectively, and a plurality of layered levels corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the ambient temperature, the charging mode and the passenger cabin air conditioning switch state are obtained.

[0075] In implementation, different components of the target vehicle have their own cooling requirements, and different temperatures have their own required refrigerating capacity. Therefore, the different temperatures of the battery body temperature, the battery water inlet temperature and the engine coolant temperature can be layered, and a plurality of layered levels of each parameter is obtained. The higher the ambient temperature, the greater the demand for refrigerating capacity, and the lower the ambient temperature, the smaller the demand for refrigerating capacity. Therefore, the different temperatures of the ambient temperature can also be layered to obtain a plurality of layered levels. Different charging modes of the target vehicle require different refrigerating capacities, so the charging mode can be layered according to different charging modes. When the passenger cabin air conditioning switch state of the target vehicle is different, the corresponding refrigerating capacity is also different, so the air conditioning can be layered according to the opening state and the closing state. The number of layered levels of different parameters is also different. Since the refrigeration requirements of different parameters are different, the refrigerating capacity required by different layered levels is also different. Therefore, different weight coefficients can be set for different layered levels in the subsequent steps.

[0076] Step 2), according to the plurality of layered levels corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the ambient temperature, the charging mode and the passenger cabin air conditioning switch state, the weight coefficient corresponding to each layered level is determined, wherein different layered levels correspond to different weight coefficients, and the sum of the weight coefficients of each parameter of the thermal management parameters is equal.

[0077] In implementation, the number of layered levels of different parameters is different, and the refrigeration requirements of different parameters are different. Therefore, the refrigerating capacity required by different layered levels is also different. The weight coefficient represents the required refrigerating capacity, the greater the weight coefficient, the more the required refrigerating capacity, and the smaller the weight coefficient, the less the required refrigerating capacity. Therefore, according to the plurality of layered levels corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the ambient temperature, the charging mode and the passenger cabin air conditioning switch state, the weight coefficient corresponding to each layered level can be determined. Different layered levels correspond to different weight coefficients. And the refrigeration requirements of each parameter in the thermal management parameters are equally important, so the sum of the weight coefficients of each parameter of the thermal management parameters is equal.

[0078] Step 3), according to the current layered level of the current thermal management parameter, the current weight coefficient corresponding to the current thermal management parameter is determined.

[0079] In the implementation, according to the current thermal management parameter obtained, the current thermal management parameter can be layered in the pre-stored hierarchical levels of the thermal management parameter shown in Table 1 to determine the current hierarchical level in which the current thermal management parameter is located. Different hierarchical levels correspond to different weight coefficients. After determining the current level of the current thermal management parameter, the current weight coefficient corresponding to the current thermal management parameter is determined according to the current hierarchical level. In this way, the current hierarchical level corresponding to the current thermal management parameter is queried in the pre-stored hierarchical levels of the thermal management parameter, and the current weight coefficient corresponding to the current thermal management parameter is determined according to the current level.

[0080] Further, the present application determines the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the environmental temperature, the charging mode and the passenger cabin air conditioner switch state through the multi-factor weighted analytic hierarchy process, and obtains the weight coefficient K according to the influence proportion. In this way, the air conditioner can more accurately control the refrigeration mode of thermal management, more reasonably allocate the refrigerating capacity, and protect the key hardware such as the power battery and the engine. According to the battery body temperature, the battery water inlet temperature, the engine coolant temperature and the environmental temperature, the battery body temperature, the battery water inlet temperature, the engine coolant temperature and the environmental temperature are classified according to different temperature values to obtain the hierarchical levels of the multiple temperatures of each parameter. Different temperatures have different cooling needs, so each hierarchical level corresponds to a different weight coefficient. The greater the value of the weight coefficient, the more refrigerating capacity is required. Different charging modes corresponding to the charging mode and different air conditioner switch states corresponding to the passenger cabin air conditioner switch state are layered for the thermal management parameter. Different charging modes and the opening and closing states of the passenger cabin air conditioner correspond to different refrigerating capacities required, so the corresponding weight coefficients are also different. In this way, the battery body temperature, the battery water inlet temperature, the engine coolant temperature, the environmental temperature, the charging mode and the passenger cabin air conditioner switch state each correspond to multiple hierarchical levels. The target vehicle considers that the refrigeration requirements of each parameter in the thermal management parameter are equally important, so the sum of the weight coefficients of each parameter of the thermal management parameter is equal. At the same time, in order to facilitate the division of the weight coefficient, the sum of the weight coefficients of each parameter is set to 10. In actual application, it can also be other, for example, 100, etc., which is not limited here.

[0081] In some embodiments, the weight coefficient K is obtained according to the battery body temperature. The weight coefficient K can be obtained according to the battery body temperature in layers. When the battery body temperature is higher than a first battery body temperature, the over-temperature damage is prone to occur, and the corresponding weight coefficient is higher than the weight coefficient of other layers. When the battery body temperature is lower than a second battery body temperature, the power battery is in a normal working temperature range, and cooling is not needed, and the corresponding weight coefficient is 0. When the battery body temperature is between the first battery body temperature and the second battery body temperature, the temperature can be further layered according to the order from high to low, and the weight coefficient corresponding to each layer decreases in size.

[0082] In some embodiments, similar to the battery body temperature principle, the weight coefficient K is obtained according to the battery water inlet temperature. When the battery water inlet temperature is higher than a first battery water inlet temperature, a large amount of refrigeration is needed to reduce the temperature, so the weight coefficient is 6. When the battery water inlet temperature is lower than a second battery water inlet temperature, cooling is not needed, so the weight coefficient is 0. When the battery water inlet temperature is between the first battery water inlet temperature and the second battery water inlet temperature, the amount of refrigeration needed is less, so the weight coefficient is 4.

[0083] In some embodiments, the weight coefficient K is obtained according to the engine coolant temperature. The weight coefficient K can be obtained according to the engine coolant temperature in layers. According to the order from high to low, the weight coefficient corresponding to each layer decreases in size. When the engine coolant temperature is lower than a first engine coolant temperature, the engine is in a normal working temperature range, and cooling is not needed, so the weight coefficient is 0. When the engine coolant temperature is higher than a second engine coolant temperature, the engine coolant temperature is prone to be too high to cause the expansion tank to burst, so a large amount of refrigeration is needed for cooling, and the engine needs to be stopped and the passenger cabin air conditioner needs to be turned off to prevent the engine from continuing to generate heat, so the weight coefficient is 6. When the engine coolant temperature is between the first engine coolant temperature and the second engine coolant temperature, the amount of refrigeration needed is less, so the weight coefficient is 4.

[0084] In some embodiments, the weight coefficient K is obtained according to the ambient temperature. The weight coefficient K can be obtained according to the ambient temperature in layers. According to the order from high to low, the weight coefficient corresponding to each layer decreases in size. When the ambient temperature is lower than a first ambient temperature, it is a comfortable temperature for the human body, and no refrigeration is needed at this time, so the weight coefficient is 0. When the ambient temperature is higher than a second ambient temperature, it is a temperature that the human body cannot tolerate, and a large amount of refrigeration is needed for cooling, so the weight coefficient is 5. When the ambient temperature is between the first ambient temperature and the second ambient temperature, the temperature can be further layered according to the order from high to low, and the weight coefficient corresponding to each layer decreases in size.

[0085] The different charging modes correspond to different heat generated, and the required refrigeration capacity is also different. In some embodiments, different charging modes correspond to different weight coefficients. When the target vehicle is not in the charging mode, no heat is generated due to charging, and the weight coefficient is 0. When the target vehicle is in the charging mode, more heat is generated, and refrigeration needs to be performed. At this time, it can be further judged whether the charging mode is a slow charging mode or a fast charging mode. Different weight coefficients are assigned to the fast charging mode and the slow charging mode. The weight coefficients can also not be distinguished between the fast charging mode and the slow charging mode, and the weight coefficients are uniformly set. At this time, the sum of the weight coefficients when the target vehicle is not in the charging mode and the weight coefficients should be the preset weight coefficient sum.

[0086] The opening state and the closing state of the passenger compartment air conditioner correspond to different refrigeration capacities. In some embodiments, different passenger compartment air conditioner switch states correspond to different weight coefficients. When the switch state of the passenger compartment air conditioner is in the closing state, the weight coefficient is 0. When the switch state of the passenger compartment air conditioner is in the opening state, a certain weight coefficient is set. The sum of the weight coefficients when the switch state of the passenger compartment air conditioner is in the closing state and the weight coefficients should be the preset weight coefficient sum.

[0087] In some embodiments, the specific hierarchical levels of each thermal management parameter and the weight coefficient values are as shown in Table 1. The above embodiments are graded by the assignment method. According to the performance of the thermal management parameters, the hierarchical levels shown in the following table are formulated, and then the influence weight values of each hierarchical level are assigned to obtain the weight coefficients K of each thermal management parameter.

[0088] Table 1

[0089]

[0090]

[0091] In some other embodiments, when step 1 is performed, the current weight coefficient of the current thermal management parameter can also be determined by the ratio method. According to the ratio of the current thermal management parameter and the preset critical parameter, and the hierarchical level of the thermal management parameter, the current weight coefficient of each current thermal management parameter is determined, and the specific process is as follows:

[0092] Step 1, obtain the current actual temperature value of each parameter of the battery body temperature, the battery water inlet temperature, the engine coolant temperature, and the environment temperature, and determine the ratio of the current actual temperature value of each parameter to the preset critical temperature value as the current weight coefficient corresponding to the current battery body temperature, the current battery water inlet temperature, the current engine coolant temperature, and the current environment temperature.

[0093] In the implementation, the ratio method is the ratio of the actual temperature value to the preset critical parameter, so that the current weight coefficient of the thermal management parameter can be determined according to the actual temperature value and the preset critical parameter of the current thermal management parameter. Since the ratio method is determined by the ratio between the temperatures, the current weight coefficients of the battery body temperature, the battery water inlet temperature, the engine coolant temperature and the environmental temperature parameter can be determined by the ratio method. The current battery body temperature, the current battery water inlet temperature, the current engine coolant temperature and the current environmental temperature are obtained, and the ratio of the current actual temperature value of each parameter to the preset critical parameter is determined as the current weight coefficient corresponding to the current battery body temperature, the current battery water inlet temperature, the current engine coolant temperature and the current environmental temperature. The preset critical parameter of each parameter is the critical temperature value preset by the technician, and the preset critical temperature value can be the temperature boundary value of the highest hierarchical level. For example, the current weight coefficient of the current battery body temperature can be the ratio of the current battery body temperature to the highest hierarchical level temperature boundary value 52℃. The current weight coefficient of the current battery water inlet temperature can be the ratio of the current battery water inlet temperature to the highest hierarchical level temperature boundary value 28℃. The current weight coefficient of the current engine coolant temperature can be the ratio of the current engine coolant temperature to the highest hierarchical level temperature boundary value 125℃. The current weight coefficient of the current environmental temperature can be the ratio of the current environmental temperature to the highest hierarchical level temperature boundary value 38℃.

[0094] Step 2, according to each charging mode corresponding to the charging mode, and the air conditioning switch state corresponding to the passenger compartment air conditioning switch state, the charging mode and the passenger compartment air conditioning switch state are layered to obtain a plurality of hierarchical levels corresponding to each of the charging mode and the passenger compartment air conditioning switch state.

[0095] In the implementation, since the ratio method determines the current weight coefficient by the ratio of the actual temperature value to the maximum temperature value, and the charging mode and the passenger compartment air conditioning switch state do not have temperature values, the current weight coefficient of the current charging mode and the current passenger compartment air conditioning switch state is still determined by the process of step one above to determine the current weight coefficient. According to each charging mode corresponding to the charging mode, and the air conditioning switch state corresponding to the passenger compartment air conditioning switch state, the charging mode and the passenger compartment air conditioning switch state are layered to obtain a plurality of hierarchical levels corresponding to each of the charging mode and the passenger compartment air conditioning switch state.

[0096] Step 3, the plurality of hierarchical levels corresponding to each of the charging mode and the passenger compartment air conditioning switch state determine the weight coefficient corresponding to each hierarchical level, wherein different hierarchical levels correspond to different weight coefficients, and the sum of the weight coefficients of the charging mode is equal to the sum of the weight coefficients of the passenger compartment air conditioning switch state.

[0097] In implementation, the multiple hierarchical levels corresponding to the charging mode and the passenger cabin air conditioner switch state respectively, determine the weight coefficients corresponding to each hierarchical level, wherein different hierarchical levels correspond to different weight coefficients, and the sum of the weight coefficients of the charging mode is equal to the sum of the weight coefficients of the passenger cabin air conditioner switch state.

[0098] Step 4, according to the current hierarchical level of the current charging mode and the current passenger cabin air conditioner switch state respectively, determine the current weight coefficient corresponding to the current charging mode and the current passenger cabin air conditioner switch state respectively.

[0099] In implementation, according to the current hierarchical level of the charging mode and the passenger cabin air conditioner switch state respectively, determine the current weight coefficient corresponding to the current charging mode and the current passenger cabin air conditioner switch state respectively.

[0100] Step two, after determining the current weight coefficients of the current battery body temperature, the current battery water inlet temperature, the current engine coolant temperature and the current environment temperature by the ratio method or the assignment method, and the current weight coefficients of the current charging mode and the current passenger cabin air conditioner switch state by the assignment method, according to the current weight coefficient corresponding to the current thermal management parameter and the pre-stored refrigeration mode, determine the current refrigeration mode for the power battery and the passenger cabin of the target vehicle.

[0101] In implementation, after determining the current weight coefficients of the current battery body temperature, the current battery water inlet temperature, the current engine coolant temperature and the current environment temperature by the ratio method or the assignment method, and the current weight coefficients of the current charging mode and the current passenger cabin air conditioner switch state by the assignment method, since the pre-stored refrigeration mode of thermal management is the correspondence between thermal management parameters, weight coefficients and refrigeration mode, different refrigeration modes correspond to different weight coefficients of different thermal management parameters. Therefore, according to the current weight coefficient corresponding to the current thermal management parameter and the pre-stored refrigeration mode of thermal management, the current refrigeration mode for the power battery and the passenger cabin of the target vehicle can be determined.

[0102] The steps of performing step two are: comparing the current weight coefficient corresponding to the current thermal management parameter with the weight coefficients of each refrigeration mode in the pre-stored refrigeration mode, and determining the refrigeration mode corresponding to the current weight coefficient as the current refrigeration mode for the power battery and the passenger cabin of the target vehicle.

[0103] In the implementation, the correspondence between the cooling mode and the weight coefficient of the thermal management parameter is stored in the pre-stored cooling mode of the thermal management, as shown in Table 2. Different cooling modes correspond to different weight coefficients of the thermal management parameter. The current weight coefficient corresponding to the current thermal management parameter is compared with the weight coefficient of each cooling mode in the pre-stored cooling mode, to determine the current weight coefficient of the current weight coefficient. The cooling mode corresponding to the current weight coefficient is the current cooling mode required by the current thermal management parameter. Then, the cooling mode corresponding to the weight coefficient can be determined as the current cooling mode for the power battery and the passenger cabin of the target vehicle. In this way, the current cooling mode required by the current thermal management parameter is determined according to the current weight coefficient of the current thermal management parameter and the pre-stored cooling mode.

[0104] Specifically, the process of comparing the current weight coefficient corresponding to the current thermal management parameter with the weight coefficient of each cooling mode in the pre-stored cooling mode, and determining the cooling mode corresponding to the current weight coefficient as the current cooling mode for the power battery and the passenger cabin of the target vehicle in the execution step is as follows:

[0105] Mode one, when the current weight coefficient of the current battery body temperature is the first pre-set battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first pre-set battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the second pre-set engine coolant temperature coefficient or the third pre-set engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the first pre-set environment temperature coefficient, the current weight coefficient of the current charging mode is the first pre-set charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is the first pre-set passenger cabin air conditioner switch state coefficient, the target vehicle is controlled not to cool the power battery and the passenger cabin of the target vehicle.

[0106] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 0, the current weight coefficient of the current battery water inlet temperature is 0, the current weight coefficient of the current engine coolant temperature is 4 or 6, the current weight coefficient of the current environment temperature is 0, the current weight coefficient of the current charging mode is 0, and the current weight coefficient of the current passenger cabin air conditioner switch state is 0, it indicates that the temperature related to the current battery body temperature and the current battery water inlet temperature of the power battery of the target vehicle is low. At the same time, the current environment temperature is low, the current charging mode is not charging, and the current passenger cabin air conditioner switch state is in the unopened state, at this time the temperature of the passenger cabin is also low. Therefore, there is no need to cool the power battery or the passenger cabin. Therefore, enter the no cooling mode, in which the power battery or the passenger cabin is not cooled.

[0107] In the second mode, when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle passenger compartment is cooled.

[0108] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 0, the current weight coefficient of the current battery water inlet temperature is 0, the current weight coefficient of the current engine coolant temperature is 0, the current weight coefficient of the current environment temperature is 2, 3 or 5, the current weight coefficient of the current charging mode is 0, and the current weight coefficient of the current passenger compartment air conditioning switch state is 10, it indicates that the temperature of the power battery of the target vehicle is related to the current battery body temperature and the current battery water inlet temperature which are low. Although the current charging mode is not charging, the current environment temperature is high, and the current passenger compartment air conditioning switch state is in the open state, at this time, the temperature affecting the passenger compartment is also high. Therefore, the passenger compartment cooling mode is entered, in which the power battery does not need to be cooled, and only the passenger compartment needs to be cooled.

[0109] In the third mode, when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or the second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the power battery and the passenger compartment of the target vehicle are cooled at the same time, and the cooling amount of the passenger compartment is greater than the cooling amount of the power battery.

[0110] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 0 or 1, the current weight coefficient of the current battery water inlet temperature is 4, the current weight coefficient of the current engine coolant temperature is 0, the current weight coefficient of the current environment temperature is 2, 3 or 5, the current weight coefficient of the current charging mode is 0, and the current weight coefficient of the current passenger compartment air conditioner switch state is 10, it indicates that the current battery body temperature of the target vehicle is high, and the current battery water inlet temperature is also high, resulting in that the power battery needs to be cooled. Although the current charging mode is not charging, the current environment temperature is high, and the passenger compartment air conditioner is in the open state, at this time, the temperature affecting the passenger compartment is very high. At this time, the priority of the passenger compartment is higher than that of the power battery. Therefore, the power battery and the passenger compartment are simultaneously cooled, and the passenger compartment cooling mode is preferred, in which the power battery and the passenger compartment are simultaneously cooled, and the cooling capacity of the passenger compartment is greater than that of the power battery.

[0111] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 0 or 1, the current weight coefficient of the current battery water inlet temperature is 4, the current weight coefficient of the current engine coolant temperature is 0, the current weight coefficient of the current environment temperature is 2, 3 or 5, the current weight coefficient of the current charging mode is 0, and the current weight coefficient of the current passenger compartment air conditioner switch state is 10, it indicates that the current battery body temperature of the target vehicle is high, and the current battery water inlet temperature is also high, resulting in that the power battery needs to be cooled. Although the current charging mode is not charging, the current environment temperature is high, and the passenger compartment air conditioner is in the open state, at this time, the temperature affecting the passenger compartment is very high. At this time, the priority of the passenger compartment is higher than that of the power battery. Therefore, the power battery and the passenger compartment are simultaneously cooled, and the passenger compartment cooling mode is preferred, in which the power battery and the passenger compartment are simultaneously cooled, and the cooling capacity of the passenger compartment is greater than that of the power battery.

[0112] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 0 or 1, the current weight coefficient of the current battery water inlet temperature is 4, the current weight coefficient of the current engine coolant temperature is 0, the current weight coefficient of the current environment temperature is 2, 3 or 5, the current weight coefficient of the current charging mode is 0, and the current weight coefficient of the current passenger compartment air conditioner switch state is 10, it indicates that the current battery body temperature of the target vehicle is high, and the current battery water inlet temperature is also high, resulting in that the power battery needs to be cooled. Although the current charging mode is not charging, the current environment temperature is high, and the passenger compartment air conditioner is in the open state, at this time, the temperature affecting the passenger compartment is very high. At this time, the priority of the passenger compartment is higher than that of the power battery. Therefore, the power battery and the passenger compartment are simultaneously cooled, and the passenger compartment cooling mode is preferred, in which the power battery and the passenger compartment are simultaneously cooled, and the cooling capacity of the passenger compartment is greater than that of the power battery.

[0113] In mode five, when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the second preset engine coolant temperature coefficient or the third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the first preset environment temperature coefficient, the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient or the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is the first preset passenger compartment air conditioner switch state coefficient, the power battery of the target vehicle is cooled.

[0114] In some embodiments, as shown in Table 2, when the current weight coefficient of the current battery body temperature is 4 or 5, the current weight coefficient of the current battery water inlet temperature is 6, the current weight coefficient of the current engine coolant temperature is 0, 4 or 6, the current weight coefficient of the current environment temperature is 0, 2, 3 or 5, the current weight coefficient of the current charging mode is 0 or 10, and the current weight coefficient of the current passenger compartment air conditioner switch state is 0, it indicates that the current battery body temperature of the target vehicle is very high, and the current battery water inlet temperature is also very high, so that the power battery needs to be cooled. Although the current charging mode is slow charging or fast charging, and the current environment temperature is high, the passenger compartment air conditioner is in an off state. Therefore, the power battery cooling mode is entered, and in the power battery cooling mode, only the power battery needs to be cooled, and the passenger compartment does not need to be cooled.

[0115] Further, Table 2 is a correspondence between the cooling mode and the weight coefficient range of the thermal management parameters. In order to avoid the fault that the engine coolant temperature is too high to cause the expansion tank to burst or the power battery temperature is too high, part of the drivability and the real-time performance of the passenger compartment can be sacrificed to reduce the possibility of fault of the target vehicle.

[0116] Further, the relationship between the battery body temperature and the battery water inlet temperature is that because the battery body heat is taken away by the battery water inlet temperature for cooling, when the battery body temperature is low, the battery water inlet temperature will not be too high. When the current battery body temperature weight coefficient is 0, the current battery water inlet temperature weight coefficient is 0 or 4; when the current battery body temperature weight coefficient is 1, the current battery water inlet temperature weight coefficient is 4. The relationship between the ambient temperature and the passenger compartment air conditioner opening state is that the air conditioner opening state is determined according to the user's operation, when the ambient temperature is low, the passenger compartment air conditioner is closed; when the ambient temperature is high, the passenger compartment air conditioner exists two situations of opening or closing. Therefore, when the current ambient temperature weight coefficient is 0, the current passenger compartment air conditioner switch state weight coefficient must be 0; when the current ambient temperature coefficient is 2, 3 or 5, the current passenger compartment air conditioner switch state weight coefficient may be 0 or 10. The relationship between the charging mode weight coefficient and the engine coolant temperature weight coefficient is that when charging, the current charging mode weight coefficient is 10, the vehicle is stationary, and the engine will not start, so the current engine coolant temperature weight coefficient should be 0. Therefore, Table 2 contains all the weight coefficients corresponding to the refrigeration modes of the power battery and the passenger compartment.

[0117] Table 2

[0118]

[0119]

[0120] Step 203, according to the current refrigeration mode, the power battery and / or the passenger compartment of the target vehicle are refrigerated.

[0121] In implementation, according to the current refrigeration mode corresponding to the current thermal management parameter, the power battery and / or the passenger compartment of the target vehicle are refrigerated.

[0122] Specifically, the specific process of executing step 203 is as follows:

[0123] Mode one, when the current refrigeration mode is no refrigeration, the refrigeration equipment of the target vehicle is controlled to not refrigerate the power battery and the passenger compartment of the target vehicle.

[0124] In implementation, when the current refrigeration mode corresponding to the current thermal management parameter is no refrigeration, the target vehicle does not need to be refrigerated, and the refrigeration equipment of the target vehicle is controlled to not refrigerate the power battery and the passenger compartment of the target vehicle.

[0125] Mode two, when the current refrigeration mode is passenger compartment refrigeration, the refrigeration equipment is controlled to refrigerate the passenger compartment of the target vehicle.

[0126] In implementation, when the current refrigeration mode corresponding to the current thermal management parameter is passenger cabin refrigeration, it indicates that the temperature of the power battery and the temperature of the engine coolant are low, and the power battery does not need to be refrigerated, and the refrigeration device is controlled to refrigerate the passenger cabin of the target vehicle.

[0127] Mode three, when the current refrigeration mode is power battery and passenger cabin refrigeration, and the passenger cabin refrigeration is given priority, the refrigeration device is controlled to refrigerate the power battery and the passenger cabin of the target vehicle at the same time, and the refrigeration amount of the passenger cabin is greater than that of the power battery.

[0128] In implementation, when the current refrigeration mode corresponding to the current thermal management parameter is power battery and passenger cabin refrigeration, and the passenger cabin refrigeration is given priority, it indicates that the temperature of the power battery and the temperature of the engine coolant are high, but not very high, and the ambient temperature of the passenger cabin is also high. Therefore, the power battery and the passenger cabin need to be refrigerated at the same time, and the passenger cabin refrigeration is given priority. That is, the power battery and the passenger cabin are refrigerated at the same time, but the refrigeration amount of the passenger cabin is greater than that of the power battery.

[0129] Mode four, when the current refrigeration mode is power battery and passenger cabin refrigeration, and the power battery refrigeration is given priority, the refrigeration device is controlled to refrigerate the power battery and the passenger cabin of the target vehicle at the same time, and the refrigeration amount of the power battery is greater than that of the passenger cabin.

[0130] In implementation, when the current refrigeration mode corresponding to the current thermal management parameter is power battery and passenger cabin refrigeration, and the power battery refrigeration is given priority, it indicates that the temperature of the power battery and the temperature of the engine coolant are very high, and the ambient temperature of the passenger cabin is also high, but not very high. Therefore, the power battery and the passenger cabin need to be refrigerated at the same time, and the power battery refrigeration is given priority. That is, the power battery and the passenger cabin are refrigerated at the same time, but the refrigeration amount of the power battery is greater than that of the passenger cabin.

[0131] Mode five, when the current refrigeration mode is power battery refrigeration, the refrigeration device is controlled to refrigerate the power battery of the target vehicle.

[0132] In implementation, when the current refrigeration mode corresponding to the current thermal management parameter is power battery refrigeration, it indicates that the current temperature of the power battery is high, and the ambient temperature of the passenger cabin is in the human comfortable temperature, so the power battery needs to be refrigerated, and the passenger cabin does not need to be refrigerated. Therefore, when the current refrigeration mode is power battery refrigeration, the refrigeration device is controlled to refrigerate the power battery of the target vehicle.

[0133] As Figure 3As shown, during the pure electric mode running of the target vehicle, it is also judged whether the target vehicle needs to reduce the output power or stop based on the temperature of the motor module to prevent the temperature of the motor module from being too high and the target vehicle from having an accident, and the specific process is as follows:

[0134] Step a: During the running of the target vehicle in the pure electric mode or the hybrid mode, the motor temperature of the target vehicle is obtained.

[0135] In implementation, during the running of the target vehicle in the pure electric mode or the hybrid mode, the motor temperature of the target vehicle is detected, and the subsequent step detects the motor temperature to judge whether the target vehicle meets the normal running of the pure electric mode. The pure electric mode running refers to a mode in which the engine of the target vehicle does not participate in the operation of the target vehicle. When the target vehicle is in the hybrid mode state, it needs to be judged according to the pure electric mode and the fuel mode at the same time.

[0136] Further, when it is detected that the motor temperature of the target vehicle is less than the first preset motor temperature threshold, it indicates that the current motor temperature meets the temperature range of the normal motor operation and will not hinder the normal running of the target vehicle, so the target vehicle can be controlled to run in the pure electric mode, that is, Figure 3 the vehicle normal operation. The first preset motor temperature threshold can be 140℃ and can be set according to the actual situation, which is not limited here.

[0137] Step b: When it is detected that the motor temperature is greater than or equal to the first preset motor temperature threshold and less than the second preset motor temperature threshold, the output power of the motor module is limited according to a preset proportion coefficient, the current speed of the target vehicle is limited to be less than a preset speed threshold, and the target vehicle is controlled to stop running until the current state of charge SOC of the power battery of the target vehicle is zero.

[0138] In implementation, the motor temperature of the target vehicle is detected and compared with the first preset motor temperature threshold and the second preset motor temperature threshold. When it is detected that the motor temperature is greater than or equal to the first preset motor temperature threshold and less than the second preset motor temperature threshold, it indicates that the motor temperature is high at this time, and the output power of the motor module needs to be limited to reduce the output power of the motor module. Therefore, the output power of the motor module can be limited according to a preset proportion coefficient, and the current speed of the target vehicle is limited to be less than a preset speed threshold. The turtle speed light can also be controlled to be turned on to prompt the driver to drive at low speed. Until the current state of charge SOC of the power battery of the target vehicle is zero, the vehicle has no power to continue running, and the target vehicle is controlled to stop running. The first preset motor temperature threshold can be 140℃, the second preset motor temperature threshold can be 150℃, and the preset proportion coefficient can be 50%. In this way, the output power of the motor module can be limited to 50% of the normal output power, and the preset speed threshold can be 15km / h.

[0139] Step c, when the motor temperature is detected to be greater than or equal to the second preset motor temperature threshold, controlling the target vehicle to stop running.

[0140] In implementation, the motor temperature of the target vehicle is detected and compared with the second preset motor temperature threshold, when the motor temperature is detected to be greater than or equal to the second preset motor temperature threshold, it means that the motor temperature is too high, in order to prevent the target vehicle from having an accident, the target vehicle needs to be stopped immediately at this time, therefore, the target vehicle is controlled to stop running.

[0141] As shown in the target vehicle fuel mode running process, whether it can continue to run or whether it needs to be converted to pure electric mode running is also judged based on the engine coolant temperature, the specific process is as follows: Figure 3

[0142] Step d, during the running of the target vehicle in fuel mode or hybrid mode, when the engine coolant temperature is detected to be greater than or equal to the first preset engine temperature threshold and less than the second preset engine temperature threshold, and the air conditioner in the passenger compartment is controlled to be turned off.

[0143] In implementation, during the running of the target vehicle in fuel mode or hybrid mode, after detecting the engine coolant temperature of the target vehicle, the engine coolant temperature is compared with the first preset engine temperature threshold and less than the second preset engine temperature threshold, when the engine coolant temperature is detected to be greater than or equal to the first preset engine temperature threshold and less than the second preset engine temperature threshold, it means that the engine coolant temperature is high. The fuel mode refers to the mode in which the motor module does not participate in the running of the target vehicle. In order to avoid the target vehicle from having a fault, the water temperature warning light needs to be controlled to be turned on, the instrument panel needs to be controlled to display a prompt that the engine coolant temperature is too high to prompt the user, and the air conditioner in the passenger compartment needs to be controlled to be turned off. When the engine coolant temperature is greater than or equal to the first preset engine temperature threshold and less than the second preset engine temperature threshold, it is consistent with the above-mentioned no refrigeration or power battery refrigeration mode, and the air conditioner in the passenger compartment needs to be controlled to be turned off. The air conditioner can be turned off by stopping the compressor, and the passenger compartment refrigeration can also be cut off by closing the stop valve. In this way, the normal work of the power battery is ensured, the passenger compartment comfort is reduced, the load of the engine is reduced, and the heat generation of the engine is reduced. The second preset engine temperature threshold can be 125℃, which can be set according to actual conditions, and is not limited herein.

[0144] Further, during the running of the target vehicle in fuel mode or hybrid mode, when the engine coolant temperature is detected to be less than the first preset engine temperature threshold, the target vehicle is controlled to maintain fuel running.

[0145] ​In the implementation, during the fuel mode driving of the target vehicle, the engine coolant temperature of the target vehicle is detected, and when it is detected that the engine coolant temperature is less than a first preset engine temperature threshold, it indicates that the engine coolant temperature is low and does not affect the fuel driving of the target vehicle, so the target vehicle can be controlled to continue fuel driving, that is Figure 3 The vehicle is in normal operation. The first preset engine temperature threshold can be 115℃.

[0146] Step e: when it is detected that the engine coolant temperature is greater than or equal to a second preset engine temperature threshold and the duration reaches a preset duration threshold, the engine of the target vehicle is controlled to stop running, the electronic water pump and the electronic fan are controlled to run at maximum power, and the target vehicle is controlled to drive in the pure electric mode.

[0147] In the implementation, after detecting the engine coolant temperature of the target vehicle, the engine coolant temperature is compared with the second preset engine temperature threshold, and when it is detected that the engine coolant temperature is greater than or equal to the second preset engine temperature threshold and the duration reaches the preset duration threshold, it indicates that the engine coolant temperature is very high and will affect the normal driving of the target vehicle in the fuel mode, so the water temperature warning light needs to be controlled to be turned on, and the instrument panel needs to be controlled to display a prompt that the engine coolant temperature is too high to prompt the user. Then, the engine of the target vehicle is controlled to stop running, the electronic water pump and the electronic fan are controlled to run at maximum power, the electronic water pump is arranged in the engine water circuit and can be arranged at the water inlet or the water outlet of the engine. The electronic fan is arranged behind the front grille of the vehicle and can blow away heat after being powered on. In this way, the electronic water pump and the electronic fan are used to cool the engine to ensure that the engine coolant temperature is within a reasonable range. The target vehicle is controlled to drive in the pure electric mode. The preset duration threshold can be 10 seconds. The engine of the target vehicle is controlled to stop running, and the motor module is controlled to start running, so that the target vehicle drives in the pure electric mode.

[0148] Step f: during the pure electric mode driving, if the engine coolant temperature is less than a third preset engine temperature threshold, the engine of the target vehicle is started, and the target vehicle is controlled to exit the pure electric mode, wherein the third preset engine temperature threshold is less than the first preset engine temperature threshold.

[0149] In the implementation, during the pure electric mode driving, the engine coolant temperature of the engine is continuously detected, and the detected engine coolant temperature is compared with a third preset engine temperature threshold. If the engine coolant temperature is less than the third preset engine temperature threshold, it indicates that the engine coolant temperature is low enough to continue the fuel mode driving, so the engine of the target vehicle can be started, the target vehicle is controlled to exit the pure electric mode, and the target vehicle is controlled to drive in the fuel mode. The third preset engine temperature threshold is less than the first preset engine temperature threshold. The third preset engine temperature threshold can be 105°C, which can be set according to actual conditions, and is not limited here.

[0150] Step g, during the pure electric mode driving, if the engine coolant temperature is greater than or equal to the third preset engine temperature threshold, it is judged whether the current SOC of the power battery of the target vehicle is less than the preset state of charge, if the current SOC is less than the preset state of charge, the speed of the target vehicle is limited to be less than the preset speed, and until the current state of charge SOC of the power battery of the target vehicle is zero, the target vehicle is controlled to stop running.

[0151] In the implementation, during the pure electric mode driving, if the engine coolant temperature is greater than or equal to the third preset engine temperature threshold, the state of charge SOC of the power battery is also detected, and the detected current SOC of the power battery is compared with the preset state of charge to judge whether the current SOC of the power battery of the target vehicle is less than the preset state of charge. If the current SOC is less than the preset state of charge, it indicates that the current power of the power battery is low or insufficient for long-distance driving of the target vehicle. Then, the speed of the target vehicle is limited to be less than the preset speed, and the turtle speed light is turned on, and until the current state of charge SOC of the power battery of the target vehicle is zero, the target vehicle is controlled to stop running. The preset state of charge can be 10%, and the preset speed can be km / h.

[0152] The embodiment of the application provides a kind of thermal management control method of vehicle, based on the thermal management parameter of target vehicle, thermal management parameter is layered and graded, and different weight coefficients are correspondingly set. Then, the corresponding refrigeration mode is matched according to the weight, to determine the corresponding refrigeration mode based on the current thermal management parameter of target vehicle, and refrigerate target vehicle. Avoid the fault that expansion kettle may be caused to burst when engine coolant is too high. To prevent the scene of exceeding design condition, engine coolant is too high to cause the first level fault of expansion kettle burst, the user is prompted more intuitively by thermal management control strategy optimization, or the level of vehicle failure is reduced by sacrificing part of driving and passenger compartment comfort.

[0153] It should be understood that, although Figures 2 to 3The steps in the flowchart are shown in sequence according to the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the steps are not strictly limited in sequence, and the steps can be executed in other sequences. Moreover, Figures 2 to 3 At least a part of the steps in the flowchart can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps in other steps.

[0154] It can be understood that the same / similar parts between the above-mentioned methods in the specification can be mutually referred to, and each embodiment focuses on the differences from other embodiments, and the related parts can be referred to the description of other method embodiments.

[0155] The embodiments of the present application also provide a device for thermal management control of a vehicle, as shown in Figure 4 The device comprises:

[0156] A first acquisition module 401 is configured to acquire a current thermal management parameter of a target vehicle, wherein the current thermal management parameter comprises a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger compartment air conditioner switch state.

[0157] A determination module 402 is configured to acquire a current weight coefficient corresponding to the current thermal management parameter, and determine a current refrigeration mode of a power battery and a passenger compartment of the target vehicle according to the current thermal management parameter and the current weight coefficient.

[0158] A refrigeration module 403 is configured to refrigerate the power battery and / or the passenger compartment of the target vehicle according to the current refrigeration mode.

[0159] As an optional implementation, the determination module 402 is specifically configured to:

[0160] Determine the current weight coefficient of each current thermal management parameter according to the current thermal management parameter and the hierarchical level of the thermal management parameter; or

[0161] Determine the current weight coefficient of each current thermal management parameter according to the ratio of the current thermal management parameter and a preset critical parameter, and the hierarchical level of the thermal management parameter.

[0162] As an optional implementation, the determination module 402 is specifically configured to:

[0163] The thermal management parameters include a battery body temperature, a battery water inlet temperature, an engine coolant temperature, an ambient temperature, a charging mode, and a passenger cabin air conditioner switch state;

[0164] The battery body temperature, the battery water inlet temperature, the engine coolant temperature, and the ambient temperature are respectively layered according to numerical values to obtain a plurality of layered grades corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature, and the ambient temperature;

[0165] The charging mode includes different charging modes, and different charging modes correspond to different layered grades;

[0166] The passenger cabin air conditioner switch state includes different switch states, and different switch states correspond to different layered grades;

[0167] The weight coefficients corresponding to each layered grade are determined, wherein different layered grades of each thermal management parameter correspond to different weight coefficients, and the weight coefficients of each layered grade of each thermal management parameter are equal in sum;

[0168] The current layered grade in which the current thermal management parameter is located is determined according to the layered grades of the thermal management parameters, and the current weight coefficient corresponding to the current thermal management parameter is determined according to the weight coefficients corresponding to each layered grade.

[0169] As an optional implementation, the determining module 402 is specifically configured to:

[0170] The thermal management parameters include a battery body temperature, a battery water inlet temperature, an engine coolant temperature, an ambient temperature, a charging mode, and a passenger cabin air conditioner switch state;

[0171] The current weight coefficient corresponding to the current battery body temperature is a ratio of the current battery body temperature to a preset critical battery body temperature;

[0172] The current weight coefficient corresponding to the current battery water inlet temperature is a ratio of the current battery water inlet temperature to a preset critical battery water inlet temperature;

[0173] The current weight coefficient corresponding to the current engine coolant temperature is a ratio of the current engine coolant temperature to a preset critical engine coolant temperature;

[0174] The current weight coefficient corresponding to the current ambient temperature is a ratio of the current ambient temperature to a preset critical ambient temperature;

[0175] The charging mode includes different charging modes, and different charging modes correspond to different layered grades;

[0176] The passenger cabin air conditioning switch state includes different switch states, and different switch states correspond to different hierarchical levels.

[0177] Determine the weight coefficients corresponding to the charging mode and the respective hierarchical level of the passenger cabin air conditioning switch state, wherein the different hierarchical levels of the charging mode and the passenger cabin air conditioning switch state correspond to different weight coefficients, and the sum of the weight coefficients of the charging mode is equal to the sum of the weight coefficients of the passenger cabin air conditioning switch state.

[0178] According to the current charging mode and the current hierarchical level of the current passenger cabin air conditioning switch state, determine the current weight coefficient corresponding to the current charging mode and the current passenger cabin air conditioning switch state.

[0179] As an optional implementation, the determination module 402 is specifically configured to:

[0180] Compare the current weight coefficient corresponding to the current thermal management parameter with the weight coefficients of each refrigeration mode stored in advance, and determine the refrigeration mode corresponding to the current weight coefficient as the current refrigeration mode for the power battery and the passenger cabin of the target vehicle.

[0181] As an optional implementation, the determination module 402 is specifically configured to:

[0182] When the current weight coefficient of the current battery body temperature is a first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a second preset engine coolant temperature coefficient or a third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is a first preset environment temperature coefficient, the current weight coefficient of the current charging mode is a first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioning switch state is a first preset passenger cabin air conditioning switch state coefficient, control the target vehicle to not refrigerate the power battery and the passenger cabin of the target vehicle.

[0183] when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle passenger compartment is cooled;

[0184] when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or the second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle power battery and passenger compartment are cooled at the same time, and the cooling capacity of the passenger compartment is greater than that of the power battery;

[0185] when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or the second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioning switch state is the second preset passenger compartment air conditioning switch state coefficient, the target vehicle power battery and passenger compartment are cooled at the same time, and the cooling capacity of the passenger compartment is greater than that of the power battery;

[0186] In a condition that the current weight coefficient of the current battery body temperature meets the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature meets the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature meets the first preset engine coolant temperature coefficient, the second preset engine coolant temperature coefficient or the third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature meets the first preset environment temperature coefficient, the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode meets the first preset charging mode coefficient or the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state meets the first preset passenger compartment air conditioner switch state coefficient, the power battery of the target vehicle is refrigerated.

[0187] As an optional implementation, the device further comprises:

[0188] The second acquisition module is configured to acquire the motor temperature of the target vehicle during driving of the target vehicle in the pure electric mode or the hybrid mode.

[0189] The limiting module is configured to, when it is detected that the motor temperature is greater than or equal to the first preset motor temperature threshold and less than the second preset motor temperature threshold, limit the output power of the motor module according to a preset proportion coefficient, limit the current speed of the target vehicle to be less than a preset speed threshold, and control the target vehicle to stop running when the current state of charge (SOC) of the power battery of the target vehicle is zero.

[0190] The first control module is configured to, when it is detected that the motor temperature is greater than or equal to the second preset motor temperature threshold, control the target vehicle to stop running.

[0191] As an optional implementation, the device further comprises:

[0192] The second control module is configured to, during driving of the target vehicle in the fuel mode or the hybrid mode, control the air conditioner of the passenger compartment to be turned off when it is detected that the engine coolant temperature is greater than or equal to the first preset engine temperature threshold and less than the second preset engine temperature threshold.

[0193] The third control module is configured to, when it is detected that the engine coolant temperature is greater than or equal to the second preset engine temperature threshold and the duration reaches a preset duration threshold, control the engine of the target vehicle to stop running, control the electronic water pump and the electronic fan to operate at maximum power, and control the target vehicle to drive in the pure electric mode.

[0194] As an optional implementation, after the control of the target vehicle to run in the pure electric mode, the device further comprises:

[0195] A fourth control module is configured to start an engine of the target vehicle and control the target vehicle to exit the pure electric mode if the engine coolant temperature is less than a third preset engine temperature threshold during the pure electric mode running, wherein the third preset engine temperature threshold is less than the first preset engine temperature threshold.

[0196] A fifth control module is configured to determine whether a current SOC of a power battery of the target vehicle is less than a preset state of charge if the engine coolant temperature is greater than or equal to the third preset engine temperature threshold during the pure electric mode running, limit a speed of the target vehicle to be less than a preset speed if the current SOC is less than the preset state of charge, and control the target vehicle to stop running when the current state of charge SOC of the power battery of the target vehicle is zero.

[0197] The embodiments of the present application provide a device for thermal management control of a vehicle. Based on thermal management parameters of a target vehicle, the thermal management parameters are hierarchically classified and graded, and different weight coefficients are correspondingly set. Then, a corresponding refrigeration mode is matched according to the weight, so as to determine the corresponding refrigeration mode based on the current thermal management parameters of the target vehicle, and refrigerate the target vehicle. The device avoids the possibility that the engine coolant is too high, which may cause the expansion tank to burst. In order to prevent the engine coolant from being too high to cause the first failure of the expansion tank to burst in the scenario of exceeding the design working condition, the thermal management control strategy is optimized to more directly prompt the user or to sacrifice part of the driving performance and the passenger compartment comfort to reduce the vehicle failure level.

[0198] The specific limitations of the device for thermal management control of a vehicle can be referred to the limitations of the method for thermal management control of a vehicle in the above, which will not be repeated here. Each module in the device for thermal management control of a vehicle can be realized by software, hardware and their combinations in whole or in part. Each module can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0199] It should be pointed out that, in this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0200] It should also be pointed out that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for display, analyzed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties.

[0201] Each embodiment in the specification is described in a relevant manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment focuses on the difference from other embodiments. In particular, for system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the method embodiment.

[0202] The technical features of the above embodiments can be combined in any way, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0203] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method of thermal management control of a vehicle, characterized by, The method comprises: obtaining a current thermal management parameter of a target vehicle, wherein the current thermal management parameter comprises a current battery body temperature, a current battery water inlet temperature, a current engine coolant temperature, a current environment temperature, a current charging mode and a current passenger compartment air conditioner switch state; obtaining a current weight coefficient corresponding to the current thermal management parameter, and determining a current cooling mode of the power battery and the passenger cabin of the target vehicle according to the current thermal management parameter and the current weight coefficient; the specific process of this step is: comparing the current weight coefficient corresponding to the current thermal management parameter with the weight coefficients of each cooling mode in the pre-stored cooling modes, and determining the cooling mode corresponding to the current weight coefficient as the current cooling mode for the power battery and the passenger cabin of the target vehicle; the specific process of this step is: when the current weight coefficient of the current battery body temperature is a first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a second preset engine coolant temperature coefficient or a third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is a first preset environment temperature coefficient, the current weight coefficient of the current charging mode is a first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is a first preset passenger cabin air conditioner switch state coefficient, the target vehicle is controlled not to cool the power battery and the passenger cabin of the target vehicle; when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is a second preset environment temperature coefficient, a third preset environment temperature coefficient or a fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is a second preset passenger cabin air conditioner switch state coefficient, the passenger cabin of the target vehicle is cooled; when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or a second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is the second preset passenger cabin air conditioner switch state coefficient, the power battery and the passenger cabin of the target vehicle are cooled at the same time, and the cooling amount of the passenger cabin is greater than the cooling amount of the power battery;when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is the second preset passenger compartment air conditioner switch state coefficient, the power battery and the passenger compartment of the target vehicle are simultaneously refrigerated, and the refrigeration amount of the power battery is greater than the refrigeration amount of the passenger compartment; when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the second preset engine coolant temperature coefficient or the third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the first preset environment temperature coefficient, the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient or the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is the first preset passenger compartment air conditioner switch state coefficient, the power battery of the target vehicle is refrigerated. According to the current refrigeration mode, the power battery and / or the passenger compartment of the target vehicle are refrigerated.

2. The method of claim 1, wherein, The current weight coefficient corresponding to the current thermal management parameter is obtained, comprising: According to the current thermal management parameter and the hierarchical level of the thermal management parameter, the current weight coefficient of each current thermal management parameter is determined; or, According to the ratio of the current thermal management parameter and the preset critical parameter, and the hierarchical level of the thermal management parameter, the current weight coefficient of each current thermal management parameter is determined.

3. The method of claim 2, wherein, According to the current thermal management parameter and the hierarchical level of the thermal management parameter, the current weight coefficient of each current thermal management parameter is determined, comprising: The thermal management parameter comprises battery body temperature, battery water inlet temperature, engine coolant temperature, environment temperature, charging mode and passenger compartment air conditioner switch state; The battery body temperature, the battery water inlet temperature, the engine coolant temperature and the environment temperature are layered according to the numerical value respectively, and a plurality of hierarchical levels corresponding to the battery body temperature, the battery water inlet temperature, the engine coolant temperature and the environment temperature are obtained; The charging mode comprises different charging modes, and different charging modes correspond to different hierarchical levels; The passenger compartment air conditioner switch state comprises different switch states, and different switch states correspond to different hierarchical levels; The weight coefficient corresponding to each hierarchical level is determined, wherein the different hierarchical levels of each thermal management parameter correspond to different weight coefficients, and the sum of the weight coefficients of each hierarchical level of each thermal management parameter is equal; According to the hierarchical level of the thermal management parameter, the current hierarchical level in which the current thermal management parameter is located is determined, and the current weight coefficient corresponding to the current thermal management parameter is determined according to the weight coefficient corresponding to each hierarchical level.

4. The method of claim 2, wherein, According to the current thermal management parameter and the ratio of the preset critical parameter, and the hierarchical level of the thermal management parameter, the current weight coefficient of each current thermal management parameter is determined, comprising: The thermal management parameter comprises battery body temperature, battery water inlet temperature, engine coolant temperature, environment temperature, charging mode and passenger compartment air conditioner switch state; The current weight coefficient corresponding to the current battery body temperature is the ratio of the current battery body temperature and the preset critical battery body temperature; The current weight coefficient corresponding to the current battery water inlet temperature is the ratio of the current battery water inlet temperature and the preset critical battery water inlet temperature; The current weight coefficient corresponding to the current engine coolant temperature is the ratio of the current engine coolant temperature and the preset critical engine coolant temperature; The current weight coefficient corresponding to the current environment temperature is the ratio of the current environment temperature and the preset critical environment temperature; The charging mode comprises different charging modes, and different charging modes correspond to different hierarchical levels; The passenger cabin air conditioning switch state includes different switch states, and different switch states correspond to different hierarchical levels; Determine the weight coefficients corresponding to each hierarchical level of the charging mode and the passenger cabin air conditioning switch state, wherein different hierarchical levels of the charging mode and the passenger cabin air conditioning switch state correspond to different weight coefficients, and the sum of the weight coefficients of the charging mode is equal to the sum of the weight coefficients of the passenger cabin air conditioning switch state; According to the current charging mode and the current passenger cabin air conditioning switch state, determine the current weight coefficient corresponding to the current charging mode and the current passenger cabin air conditioning switch state.

5. The method of claim 1, wherein, The method further comprises: During the driving process of the target vehicle in the pure electric mode or the hybrid mode, the motor temperature of the target vehicle is obtained; When it is detected that the motor temperature is greater than or equal to a first preset motor temperature threshold and less than a second preset motor temperature threshold, the output power of the motor module is limited according to a preset proportion coefficient, the current speed of the target vehicle is limited to be less than a preset speed threshold, and the target vehicle is controlled to stop running until the current state of charge SOC of the power battery of the target vehicle is zero. When it is detected that the motor temperature is greater than or equal to the second preset motor temperature threshold, the target vehicle is controlled to stop running.

6. The method of claim 1, wherein, The method further comprises: During the driving process of the target vehicle in the fuel mode or the hybrid mode, when it is detected that the engine coolant temperature is greater than or equal to a first preset engine temperature threshold and less than a second preset engine temperature threshold, the air conditioner of the passenger cabin is controlled to be turned off; When it is detected that the engine coolant temperature is greater than or equal to the second preset engine temperature threshold and the duration reaches a preset duration threshold, the engine of the target vehicle is controlled to stop running, the electronic water pump and the electronic fan are controlled to operate at maximum power, and the target vehicle is controlled to drive in the pure electric mode.

7. The method of claim 6, wherein, After the target vehicle is controlled to drive in the pure electric mode, the method further comprises: During the pure electric mode driving process, if the engine coolant temperature is less than a third preset engine temperature threshold, the engine of the target vehicle is started, and the target vehicle is controlled to exit the pure electric mode, wherein the third preset engine temperature threshold is less than the first preset engine temperature threshold; During the pure electric mode driving process, if the engine coolant temperature is greater than or equal to the third preset engine temperature threshold, it is judged whether the current SOC of the power battery of the target vehicle is less than a preset state of charge, if the current SOC is less than the preset state of charge, the speed of the target vehicle is limited to be less than a preset speed, and the target vehicle is controlled to stop running until the current state of charge SOC of the power battery of the target vehicle is zero.

8. An apparatus of thermal management control of a vehicle, characterized by, The device comprises: An acquisition module is configured to acquire a current thermal management parameter of a target vehicle, wherein the current thermal management parameter includes a current battery body temperature, a current battery inlet water temperature, a current engine coolant temperature, a current environment temperature, a current charging mode, and a current passenger cabin air conditioning switch state; determining module configured to obtain a current weight coefficient corresponding to the current thermal management parameter, and determine a current cooling mode of the power battery and the passenger cabin of the target vehicle according to the current thermal management parameter and the current weight coefficient; the specific process of this step is to compare the current weight coefficient corresponding to the current thermal management parameter with the weight coefficients of each cooling mode in the pre-stored cooling modes, and determine the cooling mode corresponding to the current weight coefficient as the current cooling mode for the power battery and the passenger cabin of the target vehicle; the specific process of this step is that: when the current weight coefficient of the current battery body temperature is a first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a second preset engine coolant temperature coefficient or a third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is a first preset environment temperature coefficient, the current weight coefficient of the current charging mode is a first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is a first preset passenger cabin air conditioner switch state coefficient, the target vehicle is controlled not to cool the power battery and the passenger cabin of the target vehicle; when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the first preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is a first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is a second preset environment temperature coefficient, a third preset environment temperature coefficient or a fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is a second preset passenger cabin air conditioner switch state coefficient, the passenger cabin of the target vehicle is cooled; when the current weight coefficient of the current battery body temperature is the first preset battery body temperature coefficient or a second preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is a second preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient, and the current weight coefficient of the current passenger cabin air conditioner switch state is the second preset passenger cabin air conditioner switch state coefficient, the power battery and the passenger cabin of the target vehicle are cooled at the same time, and the cooling amount of the passenger cabin is greater than the cooling amount of the power battery.when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is the second preset passenger compartment air conditioner switch state coefficient, the power battery and the passenger compartment of the target vehicle are simultaneously refrigerated, and the refrigeration amount of the power battery is greater than the refrigeration amount of the passenger compartment; when the current weight coefficient of the current battery body temperature is the third preset battery body temperature coefficient or the fourth preset battery body temperature coefficient, the current weight coefficient of the current battery water inlet temperature is the third preset battery water inlet temperature coefficient, the current weight coefficient of the current engine coolant temperature is the first preset engine coolant temperature coefficient, the second preset engine coolant temperature coefficient or the third preset engine coolant temperature coefficient, the current weight coefficient of the current environment temperature is the first preset environment temperature coefficient, the second preset environment temperature coefficient, the third preset environment temperature coefficient or the fourth preset environment temperature coefficient, the current weight coefficient of the current charging mode is the first preset charging mode coefficient or the second preset charging mode coefficient, and the current weight coefficient of the current passenger compartment air conditioner switch state is the first preset passenger compartment air conditioner switch state coefficient, the power battery of the target vehicle is refrigerated. The refrigeration module is configured to cool the power battery and / or the passenger compartment of the target vehicle according to the current refrigeration mode.

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