Thermal management control method, system, medium and electronic device in low power condition

Abstract

The application discloses a low-power working condition heat management control method, system, medium and electronic equipment. The method comprises the following steps: in the case that the vehicle has a refrigeration demand and the state of charge of the battery monomer is less than a preset first threshold value, determining whether the state of charge of the battery monomer is less than a preset second threshold value and greater than a preset third threshold value; if yes, determining whether the compressor of the vehicle is refrigerating the cab and / or the battery monomer; in the case of refrigerating the cab and the battery monomer, controlling the cab refrigeration stop valve to be prohibited from being closed, and performing heat management on the battery monomer; or in the case of refrigerating the battery monomer, performing heat management on the battery monomer; or in the case of refrigerating the cab, controlling the cab refrigeration stop valve to be prohibited from being closed and the compressor to be prohibited from operating. Therefore, by adopting the embodiments of the application, the working mode of the heat management system can be dynamically adjusted, the power consumption is reduced under the premise of ensuring that the battery is not overheated, and the energy management of the whole vehicle is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a thermal management control method and system under low power condition, medium and electronic equipment. BACKGROUND

[0002] In the field of hybrid vehicles, for example Figure 1 As shown in the figure, the integrated thermal management system is widely used because it can effectively integrate the cooling needs of the cab and the battery. The system usually uses the same set of compressors, condensers and condenser fans to meet the cooling needs of the cab and the battery.

[0003] In related technologies, the integrated thermal management system is usually managed by separate controllers, which only consider the cooling needs of the cab or the battery, and ignore the energy management of the whole vehicle. This management method can work normally when the power is sufficient, but in the case of low power of the whole vehicle, the normal operation of the thermal management system may cause the power to further decrease, which may eventually cause the high-voltage system of the vehicle to shut down, affecting the normal operation of the vehicle. SUMMARY

[0004] The embodiments of the present application provide a thermal management control method and system under low power condition, medium and electronic equipment. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This part is not a general review, nor does it determine the key / important elements or describe the protection scope of these embodiments. Its only purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0005] In a first aspect, the embodiments of the present application provide a thermal management control method under low power condition, the method comprising:

[0006] In the case that the vehicle has a refrigeration demand and the state of charge of the battery monomer is less than a preset first threshold value, it is judged whether the state of charge of the battery monomer is less than a preset second threshold value and greater than a preset third threshold value, the preset third threshold value is less than the preset second threshold value, the preset second threshold value is less than the preset first threshold value, and the difference between the preset first threshold value, the preset second threshold value and the preset third threshold value satisfies a preset condition;

[0007] In the case that the state of charge of the battery monomer is less than the preset second threshold value and greater than the preset third threshold value, it is judged whether the compressor of the vehicle cools the cab and / or the battery monomer of the vehicle;

[0008] In the case of refrigerating the cab and the battery monomer, the control cab refrigeration stop valve is prohibited from being closed to prohibit the cab refrigeration, and the battery monomer is subjected to thermal management; or, in the case of refrigerating the battery monomer, the battery monomer is subjected to thermal management; or, in the case of refrigerating the cab, the control cab refrigeration stop valve is prohibited from being closed and the compressor is prohibited from operating.

[0009] Optionally, the method further comprises:

[0010] In the case that the state of charge of the battery monomer is greater than or equal to a preset second threshold, obtaining a required rotating speed of the compressor;

[0011] Multiplying the required rotating speed by a preset first correction coefficient to obtain a first actual rotating speed of the compressor;

[0012] Based on the first actual rotating speed of the compressor, controlling the compressor to operate to reduce the operating power of the compressor; the preset first correction coefficient is less than or equal to 1;

[0013] In the operating process of the compressor reducing the operating power, judging whether the battery monomer has an overheating risk;

[0014] In the case that the battery monomer does not have the overheating risk, ending the thermal management control process.

[0015] Optionally, the thermal management of the battery monomer comprises:

[0016] Obtaining a required rotating speed of the compressor;

[0017] Multiplying the required rotating speed by a preset second correction coefficient to obtain a second actual rotating speed of the compressor; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient;

[0018] Based on the second actual rotating speed of the compressor, controlling the compressor to operate to reduce the operating power of the compressor;

[0019] In the operating process of the compressor reducing the operating power, judging whether the battery monomer has an overheating risk;

[0020] In the case that the battery monomer does not have the overheating risk, ending the thermal management control process.

[0021] Optionally, judging whether the battery monomer has an overheating risk comprises:

[0022] Obtaining a highest temperature value of the battery monomer in a preset first period;

[0023] In the case that the highest temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery monomer in a second period is greater than the highest temperature value, determining that the battery monomer has an overheating risk; the second period is located after the first period;

[0024] Or, in the case that the maximum temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery monomer in the second period is less than or equal to the maximum temperature value, it is determined that the battery monomer does not have an overheating risk.

[0025] Or, in the case that the maximum temperature value is less than the preset temperature threshold, it is determined that the battery monomer does not have an overheating risk.

[0026] Optionally, the method further comprises:

[0027] In the case that the battery monomer has an overheating risk, the correction coefficient is adjusted according to a preset step size, and the actual speed of the compressor is recalculated based on the adjusted correction coefficient;

[0028] According to the recalculated actual speed of the compressor, the step of controlling the operation of the compressor to reduce the operating power of the compressor is continued to be performed until the battery monomer does not have an overheating risk.

[0029] Optionally, the method further comprises:

[0030] In the case that the vehicle has a refrigeration demand and the state of charge of the battery monomer is greater than or equal to a preset first threshold, the compressor is controlled to operate normally by using a constant speed control or a segmented speed control preset by the vehicle;

[0031] In the case that the state of charge of the battery monomer is less than or equal to a preset third threshold, the compressor is controlled to be prohibited from operating.

[0032] Optionally, the method further comprises:

[0033] It is judged whether the state of charge of the battery monomer increases in a preset time period;

[0034] If yes, the thermal management control process is continued to be performed;

[0035] If no, a parked power generation prompt information is generated and sent to an instrument for display to prompt a user to perform parked power generation.

[0036] In a second aspect, an embodiment of the present application provides a thermal management control system in a low power condition, the system comprising:

[0037] A first judging module is configured to judge, in the case that the vehicle has a refrigeration demand and the state of charge of the battery monomer is less than a preset first threshold, whether the state of charge of the battery monomer is less than a preset second threshold and greater than a preset third threshold, the preset third threshold being less than the preset second threshold, the preset second threshold being less than the preset first threshold, and the difference between the preset first threshold, the preset second threshold and the preset third threshold satisfying a preset condition;

[0038] The second determining module is configured to determine whether the compressor of the vehicle is cooling the cab and / or the battery monomer in a case where the state of charge of the battery monomer is less than a preset second threshold and greater than a preset third threshold.

[0039] The control module is configured to control the cab cooling stop valve to be prohibited from being closed to prohibit the cab from being cooled and to perform thermal management on the battery monomer in a case where the cab and the battery monomer are cooled; or to perform thermal management on the battery monomer in a case where the battery monomer is cooled; or to control the cab cooling stop valve to be prohibited from being closed and the compressor to be prohibited from operating in a case where the cab is cooled.

[0040] In a third aspect, an embodiment of the present application provides a computer storage medium, which stores a plurality of instructions. The instructions are suitable for being loaded by a processor and performing the method steps described above.

[0041] In a fourth aspect, an embodiment of the present application provides an electronic device, which can include a processor and a memory. The memory stores a computer program, and the computer program is suitable for being loaded by the processor and performing the method steps described above.

[0042] The technical solution provided by the embodiment of the present application can include the following beneficial effects.

[0043] In the embodiment of the present application, by setting the preset first threshold, the preset second threshold and the preset third threshold for measuring the state of charge of the battery monomer, the integrated thermal management working state can be adjusted online in the case where the vehicle has a cooling demand and the vehicle has a low power condition, the power consumption is reduced under the premise that the battery is not overheated, the vehicle energy management is optimized, and the vehicle reliability is improved.

[0044] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0046] Figure 1 is a schematic diagram of a vehicle internal structure provided by an embodiment of the present application;

[0047] Figure 2 is a flowchart of a thermal management control method in a low power condition provided by an embodiment of the present application;

[0048] Figure 3 is a process schematic block diagram of a thermal management control process in a low power condition provided by the present application;

[0049] Figure 4Fig. 1 is a schematic diagram of a logic judgment process for cab and / or battery cell refrigeration of a vehicle provided by the present application;

[0050] Figure 5 Fig. 1 is a schematic diagram of a logic judgment process for cab and / or battery cell refrigeration of a vehicle provided by the present application;

[0051] Figure 6 Fig. 1 is a schematic diagram of a logic judgment process for cab and / or battery cell refrigeration of a vehicle provided by the present application; DETAILED DESCRIPTION

[0052] The following description and drawings are illustrative of the specific embodiments of the present application and are not intended to limit the generality of the application.

[0053] It should be noted that the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0054] The following description refers to the accompanying drawings. Unless otherwise indicated, same numbers in different drawings indicate same or similar elements. The following description of the example embodiments is not meant to limit the application in any way. Rather, it is intended to provide an example of systems and methods consistent with the application as set forth in the claims.

[0055] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "multiple" means two or more, unless otherwise specified. "And / or", which describes the relationship between the associated objects, means that there can be three relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects.

[0056] The present application provides a thermal management control method, system, medium and electronic device under low battery condition, to solve the problems existing in the above related technical problems. In the embodiments of the present application, by setting the preset first threshold, the preset second threshold and the preset third threshold for measuring the state of charge of the battery cell, the integrated thermal management working state can be adjusted online under the condition that the vehicle has refrigeration demand and the whole vehicle is in low battery condition, the power consumption is reduced under the premise that the battery does not overheat, the whole vehicle energy management is optimized, the whole vehicle reliability is improved, and the following exemplary embodiments are described in detail.

[0057] The application will be described below in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 4 The low-power working condition thermal management control method provided by the embodiments of the application will be described in detail. The method can be implemented by relying on a computer program and can run on a low-power working condition thermal management control system based on the von Neumann architecture. The computer program can be integrated in an application or can run as an independent tool application.

[0058] Please refer to Figure 2 A flowchart of a low-power working condition thermal management control method provided by the embodiments of the application is shown in FIG. 1. As shown in FIG. 1, the method of the embodiments of the application can include the following steps: Figure 2

[0059] S101, in the case where the vehicle has a refrigeration demand and the state of charge of the battery monomer is less than a preset first threshold value, determining whether the state of charge of the battery monomer is less than a preset second threshold value and greater than a preset third threshold value, the preset third threshold value being less than the preset second threshold value, and the preset second threshold value being less than the preset first threshold value, and the difference between the preset first threshold value, the preset second threshold value and the preset third threshold value satisfying a preset condition;

[0060] The refrigeration demand refers to a situation where the vehicle cab or the battery needs to be cooled because the temperature is too high. The state of charge (SOC) is a percentage representation of the remaining battery capacity and is used to describe the current battery capacity level. The preset first threshold value, the preset second threshold value and the preset third threshold value are specific percentage values of the SOC that are set in advance and are used to distinguish different capacity states and trigger different control strategies. The preset condition refers to the requirement that the difference between the preset first threshold value, the preset second threshold value and the preset third threshold value needs to meet a specific requirement. The preset condition can be that the difference between the first threshold value, the preset second threshold value and the preset third threshold value is 30.

[0061] In some embodiments of the application, in the case where the vehicle does not have a refrigeration demand, the flow is ended and the next cycle is waited for to continue determining whether there is a refrigeration demand.

[0062] In some embodiments of the application, in the case where the vehicle has a refrigeration demand and the state of charge of the battery monomer is greater than or equal to the preset first threshold value, the preset constant speed control or the preset segmented speed control of the vehicle is adopted to control the compressor to operate normally. The preset constant speed control or the preset segmented speed control is the existing control mode, i.e., the normal control mode under the condition of sufficient SOC.

[0063] In some embodiments of the application, in the case where the vehicle has a refrigeration demand and the state of charge of the battery monomer is less than the preset first threshold value, it is determined whether the state of charge of the battery monomer is less than the preset second threshold value and greater than the preset third threshold value, and the preset third threshold value is less than the preset second threshold value.

[0064] ​In some embodiments of the present application, when the state of charge of the battery cell is greater than or equal to a preset second threshold, the required speed of the compressor is obtained; the required speed is multiplied by a preset first correction coefficient to obtain a first compressor actual speed; based on the first compressor actual speed, the compressor is controlled to operate to reduce the operating power of the compressor; the preset first correction coefficient is less than or equal to 1; during the operation of the compressor to reduce the operating power, it is determined whether the battery cell has an overheating risk; when the battery cell does not have an overheating risk, the heat management control process is ended.

[0065] In some embodiments of the present application, the specific process of determining whether the battery cell has an overheating risk includes: obtaining the highest temperature value of the battery cell in a preset first period; in the case that the highest temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery cell in a second period is greater than the highest temperature value, it is determined that the battery cell has an overheating risk; the second period is located after the first period; or, in the case that the highest temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second period is less than or equal to the highest temperature value, it is determined that the battery cell does not have an overheating risk; or, in the case that the highest temperature value is less than the preset temperature threshold, it is determined that the battery cell does not have an overheating risk.

[0066] In some embodiments of the present application, when the state of charge of the battery cell is less than or equal to a preset third threshold, the compressor is controlled to be prohibited from operating.

[0067] For example, the total capacity of the battery of a hybrid vehicle is 100 kWh, and the preset SOC thresholds are as follows: the preset first threshold (SOC1) is 80%, i.e. 80 kWh; the preset second threshold (SOC2) is 40%, i.e. 40 kWh; and the preset third threshold (SOC3) is 20%, i.e. 20 kWh.

[0068] In the case that it is monitored that the vehicle has a cooling demand, if the SOC is greater than or equal to 80%, the preset constant speed control or segmented speed control of the vehicle is adopted to control the compressor to operate normally.

[0069] If the SOC is less than 80%, the system further checks whether the SOC meets the condition of being lower than 40% (second threshold) and higher than 20% (third threshold) at the same time. If the SOC is between 20% and 40%, i.e., the condition of 20% < SOC < 40% is met, the system determines whether the compressor of the vehicle is cooling the cab and / or the battery monomer of the vehicle. If the SOC is higher than 40%, the required speed of the compressor is obtained; the required speed is multiplied by a preset first correction coefficient to obtain a first compressor actual speed; based on the first compressor actual speed, the compressor is controlled to operate to reduce the operating power of the compressor; the preset first correction coefficient is less than or equal to 1; during the operation of the compressor to reduce the operating power, it is determined whether the battery monomer is at risk of overheating; in the case that the battery monomer is not at risk of overheating, the thermal management control process is ended. If the SOC is lower than 20%, the compressor is controlled to be prohibited from operating.

[0070] S102, in the case that the state of charge of the battery monomer is less than a preset second threshold and greater than a preset third threshold, it is determined whether the compressor of the vehicle is cooling the cab and / or the battery monomer of the vehicle.

[0071] In the refrigeration system of the vehicle, the compressor is a mechanical device for lifting low-pressure gas to high-pressure gas and is a core component in the refrigeration cycle. The cab refers to a space inside the vehicle for the driver and passengers to sit. The battery monomer refers to the battery pack of the vehicle.

[0072] In some embodiments of the present application, it is first checked whether the SOC of the battery monomer is lower than 40% (preset second threshold) and higher than 20% (preset third threshold). If the SOC is in this range, the system needs to determine next whether the compressor of the vehicle is cooling the cab and / or the battery monomer of the vehicle.

[0073] S103, in the case of cooling the cab and the battery monomer, the cab refrigeration stop valve is controlled to be prohibited from being closed to prohibit cooling the cab, and the battery monomer is subjected to thermal management; or in the case of cooling the battery monomer, the battery monomer is subjected to thermal management; or in the case of cooling the cab, the cab refrigeration stop valve is controlled to be prohibited from being closed and the compressor is prohibited from operating.

[0074] In some embodiments of the present application, the specific process of thermal management of the battery monomer includes: obtaining the required speed of the compressor; multiplying the required speed by a preset second correction coefficient to obtain a second compressor actual speed; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient; based on the second compressor actual speed, the compressor is controlled to operate to reduce the operating power of the compressor; during the operation of the compressor to reduce the operating power, it is determined whether the battery monomer is at risk of overheating; in the case that the battery monomer is not at risk of overheating, the thermal management control process is ended.

[0075] In some embodiments of the present application, the specific process of determining whether the battery cell has an overheat risk includes: obtaining a highest temperature value of the battery cell in a preset first period; in a case where the highest temperature value is greater than or equal to a preset temperature threshold and a temperature of the battery cell in a second period is greater than the highest temperature value, determining that the battery cell has an overheat risk; the second period is after the first period; or, in a case where the highest temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second period is less than or equal to the highest temperature value, determining that the battery cell does not have an overheat risk; or, in a case where the highest temperature value is less than the preset temperature threshold, determining that the battery cell does not have an overheat risk.

[0076] In some embodiments of the present application, in a case where the battery cell has an overheat risk, the correction coefficient is adjusted by a preset step, and the actual speed of the compressor is recalculated based on the adjusted correction coefficient; the step of controlling the operation of the compressor to reduce the operating power of the compressor is continued according to the recalculated actual speed of the compressor until the battery cell does not have an overheat risk.

[0077] Further, the method further includes: determining whether the state of charge of the battery cell is increased in a preset time period; if yes, continuing to perform the thermal management control process; if no, generating a parked power generation prompt information and sending it to the instrument for display to prompt the user to perform parked power generation.

[0078] For example, the system monitors the SOC of the battery cell in real time and records the change in a preset time period (for example, in the past 30 minutes). If the SOC of the battery cell is increased in the preset time period, it means that the battery may be charging or the vehicle energy recovery system is working, and the system will continue to perform the thermal management control process to ensure that the battery temperature is maintained within a safe range. If the SOC of the battery cell is not increased in the preset time period, i.e., the battery power is not increased, the system will generate a parked power generation prompt information. This is because the low battery power and no replenishment may affect the next driving of the vehicle. The system sends the parked power generation prompt information to the vehicle instrument for display to prompt the user to perform parked power generation to replenish the battery power and maintain the battery health status.

[0079] For example Figure 3As shown, it is judged whether the cab or the battery has a refrigeration requirement, if not, the process ends, if yes, it is judged whether the SOC is lower than the first threshold value; if not, the constant speed control or the segmented speed control preset by the vehicle is adopted to control the compressor to normally operate (i.e. the compressor speed is equal to the required speed), if yes, it is judged whether the state of charge of the battery is less than the preset second threshold value; if not, the required speed is multiplied by the correction coefficient A to obtain the actual speed, based on the actual speed, the compressor is controlled to operate to reduce the operating power of the engine, during the operation of the compressor to reduce the operating power, the temperature of the battery monomer is read, based on the read temperature, it is judged whether the battery has an overheating risk, if not, the process ends, if yes, the correction coefficient A is adjusted, and the required speed is continuously multiplied by the adjusted correction coefficient A until the battery has no overheating risk, if the state of charge of the battery is less than the preset second threshold value, it is judged whether the SOC is lower than the third threshold value; if yes, the compressor is prohibited from working, and the process ends, if not, the logical judgment of the cab and / or the battery monomer refrigeration of the vehicle is performed. It is further judged whether the SOC increases within the preset time, if yes, the thermal management control is returned to continue to be executed, if not, the instrument prompts the driver to perform the on-board power generation.

[0080] For example Figure 4 As shown, the schematic diagram of the logical judgment process of the cab and / or the battery monomer refrigeration of the vehicle, it is judged whether the cab and the battery are simultaneously refrigerated, if not, the next step is entered, if yes, the cab refrigeration stop valve is prohibited from being closed, the cab refrigerant cooling loop cannot be formed, only the battery refrigeration is executed, the compressor operates at a reduced power, the compressor speed = the required speed (note that the required speed calculation logic is consistent with the single battery refrigeration, which is the prior art) * the correction coefficient B, wherein the correction coefficient B < A < 1, the battery monomer temperature is monitored at the same time, the battery is in real time judged whether there is an overheating risk, if there is an overheating risk, the correction coefficient B is adjusted, the specific adjustment principle is to increase by a preset proportion while ensuring that B ≤ 1, then the judgment is returned to continue to be executed, if there is no overheating risk, the process ends. It is judged whether the single battery is refrigerated, if yes, the compressor operates at a reduced power, if not, the cab refrigeration stop valve is prohibited from being closed, the compressor is prohibited from working, and the process ends.

[0081] In the embodiment of the present application, by setting the preset first threshold value, the preset second threshold value and the preset third threshold value for measuring the state of charge of the battery monomer, in the case that the vehicle has a refrigeration requirement and the whole vehicle has low power, the integrated thermal management working state can be adjusted online, the power consumption is reduced under the premise that the battery does not overheat, the whole vehicle energy management is optimized, and the whole vehicle reliability is improved.

[0082] The following is an embodiment of the system of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the system embodiments of the present application, please refer to the method embodiments of the present application.

[0083] Please refer toFigure 5 , which shows a schematic diagram of the structure of a thermal management control system for low-battery conditions, provided by an exemplary embodiment of the present application. This thermal management control system for low-battery conditions can be implemented as all or part of an electronic device through software, hardware, or a combination of both. The system 1 includes a first determination module 10, a second determination module 20, and a control module 30.

[0084] The first judgment module 10 is configured to, when the vehicle has a cooling demand and the state of charge of the battery cell is less than a preset first threshold, determine whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold, the preset third threshold is less than the preset second threshold, the preset second threshold is less than the preset first threshold, and the difference between the preset first threshold, the preset second threshold, and the preset third threshold satisfies a preset condition;

[0085] A second judgment module 20 is configured to determine whether the vehicle compressor is cooling the vehicle cabin and / or the battery cell when the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold;

[0086] The control module 30 is used to control the cab cooling stop valve to prohibit closing when cooling the cab and the battery cells, so as to prohibit cooling the cab and perform thermal management on the battery cells; or to perform thermal management on the battery cells when cooling the battery cells; or to control the cab cooling stop valve to prohibit closing and the compressor to prohibit running when cooling the cab.

[0087] It should be noted that the thermal management control system under low-battery conditions provided in the above embodiment only uses the division of the above-mentioned functional modules as an example when executing the thermal management control method under low-battery conditions. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the thermal management control system under low-battery conditions provided in the above embodiment and the thermal management control method embodiment under low-battery conditions are of the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.

[0088] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0089] In an embodiment of the present application, by setting a preset first threshold, a preset second threshold, and a preset third threshold for measuring the state of charge of a battery cell, when the vehicle has a cooling demand and the vehicle is in a low-power operating condition, the integrated thermal management working state can be adjusted online to ensure that the battery does not overheat and reduce power consumption, optimize the energy management of the vehicle, and improve the reliability of the vehicle.

[0090] The application further provides a computer readable medium, which stores program instructions, and the program instructions are executed by a processor to implement the low-power working condition heat management control method provided by each method embodiment.

[0091] The application further provides a computer program product containing instructions, which, when executed on a computer, cause the computer to execute the low-power working condition heat management control method of each method embodiment.

[0092] Please refer to Figure 6 A structural schematic diagram of an electronic device is provided for the embodiments of the application. As shown in the figure, Figure 6 The electronic device 1000 can include at least one processor 1001, at least one network interface 1004, a user interface 1003, a memory 1005, and at least one communication bus 1002.

[0093] The communication bus 1002 is used to realize the connection and communication between the components.

[0094] The user interface 1003 can include a display screen (Display), a camera (Camera), and optionally a standard wired interface and a wireless interface.

[0095] The network interface 1004 can optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).

[0096] The processor 1001 can include one or more processing cores. The processor 1001 connects various parts within the entire electronic device 1000 through various interfaces and lines, and performs various functions of the electronic device 1000 and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 1005, and calling data stored in the memory 1005. Alternatively, the processor 1001 can be implemented in at least one of a hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic array (PLA). The processor 1001 can integrate a combination of one or several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes an operating system, a user interface, and an application program; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; and the modem is used for processing wireless communication. It can be understood that the above-mentioned modem can also not be integrated into the processor 1001, but can be realized by a separate chip.

[0097] The memory 1005 can include a random access memory (RAM) and can also include a read-only memory (ROM). Optionally, the memory 1005 includes a non-transitory computer-readable storage medium. The memory 1005 can be used to store instructions, programs, codes, code sets, or instruction sets. The memory 1005 can include a program storage area and a data storage area, wherein the program storage area can store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area can store data involved in the above-mentioned various method embodiments, etc. The memory 1005 can also be at least one storage system located away from the above-mentioned processor 1001. As shown in the figure, the memory 1005 as a computer storage medium can include an operating system, a network communication module, a user interface module, and a thermal management control application program in a low power condition. Figure 6

[0098] In Figure 6 ​In the electronic device 1000 shown, the user interface 1003 is mainly used to provide an interface for user input, and obtain data input by the user; and the processor 1001 can be used to call a low-power working condition thermal management control application stored in the memory 1005, and specifically perform the following operations:

[0099] In a case where the vehicle has a refrigeration demand and the state of charge of the battery cell is less than a preset first threshold value, it is determined whether the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value, the preset third threshold value is less than the preset second threshold value, the preset second threshold value is less than the preset first threshold value, and the difference between the preset first threshold value, the preset second threshold value and the preset third threshold value satisfies a preset condition;

[0100] In a case where the state of charge of the battery cell is less than the preset second threshold value and greater than the preset third threshold value, it is determined whether the compressor of the vehicle is refrigerating the cab and / or the battery cell;

[0101] In a case where the cab and the battery cell are refrigerated, the cab refrigeration stop valve is controlled to be prohibited from being closed to prohibit refrigeration of the cab, and the battery cell is subjected to thermal management; or in a case where the battery cell is refrigerated, the battery cell is subjected to thermal management; or in a case where the cab is refrigerated, the cab refrigeration stop valve is controlled to be prohibited from being closed and the compressor is prohibited from operating.

[0102] In one embodiment, the processor 1001 further performs the following operations:

[0103] In a case where the state of charge of the battery cell is greater than or equal to the preset second threshold value, the demand speed of the compressor is obtained;

[0104] The demand speed is multiplied by a preset first correction coefficient to obtain a first compressor actual speed;

[0105] Based on the first compressor actual speed, the compressor is controlled to operate to reduce the operating power of the compressor; and the preset first correction coefficient is less than or equal to 1;

[0106] In the operating process of the compressor reducing the operating power, it is determined whether the battery cell has an overheating risk;

[0107] In a case where the battery cell does not have an overheating risk, the thermal management control process is ended.

[0108] In one embodiment, when the processor 1001 performs thermal management on the battery cell, it specifically performs the following operations:

[0109] The demand speed of the compressor is obtained;

[0110] The demand rotating speed is multiplied by a preset second correction coefficient to obtain a second compressor actual rotating speed; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient;

[0111] Based on the second compressor actual rotating speed, the compressor is controlled to operate to reduce the operating power of the compressor;

[0112] In the operating process in which the compressor reduces the operating power, it is determined whether the battery monomer has an overheating risk;

[0113] In the case where the battery monomer does not have the overheating risk, the thermal management control process is ended.

[0114] In an embodiment, the processor 1001 specifically performs the following operations when determining whether the battery monomer has the overheating risk:

[0115] The highest temperature value of the battery monomer in a preset first period is obtained;

[0116] In the case where the highest temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery monomer in a second period is greater than the highest temperature value, it is determined that the battery monomer has the overheating risk; the second period is located after the first period;

[0117] Alternatively, in the case where the highest temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery monomer in the second period is less than or equal to the highest temperature value, it is determined that the battery monomer does not have the overheating risk;

[0118] Alternatively, in the case where the highest temperature value is less than the preset temperature threshold, it is determined that the battery monomer does not have the overheating risk.

[0119] In an embodiment, the processor 1001 further performs the following operations:

[0120] In the case where the battery monomer has the overheating risk, the correction coefficient is adjusted by a preset step, and the actual rotating speed of the compressor is recalculated based on the adjusted correction coefficient;

[0121] According to the recalculated actual rotating speed of the compressor, the step of controlling the compressor to operate to reduce the operating power of the compressor is continuously performed until the battery monomer does not have the overheating risk.

[0122] In an embodiment, the processor 1001 further performs the following operations:

[0123] In the case where the vehicle has a refrigeration demand and the state of charge of the battery monomer is greater than or equal to a preset first threshold, the compressor is controlled to normally operate by using a constant rotating speed control or a segmented rotating speed control preset by the vehicle;

[0124] In the case where the state of charge of the battery monomer is less than or equal to a preset third threshold, the compressor is controlled to be prohibited from operating.

[0125] In one embodiment, the processor 1001 also performs the following operations:

[0126] determining whether the state of charge of the battery monomer increases in a preset time period;

[0127] If yes, continue to perform the thermal management control process;

[0128] If no, generate a parked power generation prompt message and send it to the instrument for display to prompt the user to perform parked power generation.

[0129] In the embodiments of the present application, by setting the preset first threshold, the preset second threshold and the preset third threshold for measuring the state of charge of the battery monomer, in the case of vehicle refrigeration demand and low battery power, the integrated thermal management working state can be adjusted online to reduce power consumption under the premise of not overheating the battery, optimize the vehicle energy management and improve the vehicle reliability.

[0130] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the program for thermal management control in the low power condition can be stored in a computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments. The storage medium of the program for thermal management control in the low power condition can be a disk, an optical disc, a read-only memory or a random access memory, etc.

[0131] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the rights of the present application, so the equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A method of thermal management control in low battery conditions, characterized by, The method comprises: In the case that the vehicle has a refrigeration demand and the state of charge of the battery cell is less than a preset first threshold, it is judged whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold, the preset third threshold is less than the preset second threshold, the preset second threshold is less than the preset first threshold, and the difference between the preset first threshold, the preset second threshold and the preset third threshold satisfies a preset condition; In the case that the state of charge of the battery cell is less than the preset second threshold and greater than the preset third threshold, it is judged whether the compressor of the vehicle refrigerates the cab and / or the battery cell; In the case of refrigerating the cab and the battery cell, the cab refrigeration stop valve is controlled to be prohibited from being closed to prohibit refrigerating the cab, and the battery cell is subjected to thermal management; or in the case of refrigerating the battery cell, the battery cell is subjected to thermal management; or in the case of refrigerating the cab, the cab refrigeration stop valve is controlled to be prohibited from being closed and the compressor is prohibited from operating; In the case that the state of charge of the battery cell is greater than or equal to the preset second threshold, the required speed of the compressor is obtained; The required speed is multiplied by a preset first correction coefficient to obtain a first actual speed of the compressor; Based on the first actual speed of the compressor, the compressor is controlled to operate to reduce the operating power of the compressor; the preset first correction coefficient is less than or equal to 1; In the operating process of the compressor with reduced operating power, it is judged whether the battery cell has an overheating risk; In the case that the battery cell has no overheating risk, the thermal management control process is ended.

2. The method of claim 1, wherein, The thermal management of the battery cell comprises: The required speed of the compressor is obtained; The required speed is multiplied by a preset second correction coefficient to obtain a second actual speed of the compressor; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient; Based on the second actual speed of the compressor, the compressor is controlled to operate to reduce the operating power of the compressor; In the operating process of the compressor with reduced operating power, it is judged whether the battery cell has an overheating risk; In the case that the battery cell has no overheating risk, the thermal management control process is ended.

3. The method of claim 2, wherein, The judgment of whether the battery cell has an overheating risk comprises: The highest temperature value of the battery cell in a preset first period is obtained; In the case that the highest temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery cell in a second period is greater than the highest temperature value, it is determined that the battery cell has an overheating risk; the second period is after the first period; Or, in the case that the highest temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery cell in the second period is less than or equal to the highest temperature value, it is determined that the battery cell has no overheating risk; Or, in the case that the highest temperature value is less than a preset temperature threshold, it is determined that the battery cell has no overheating risk.

4. The method of claim 2, wherein, The method further comprises: In the case that the battery cell has an overheating risk, the correction coefficient is adjusted according to a preset step, and the actual speed of the compressor is recalculated based on the adjusted correction coefficient; According to the recalculated actual speed of the compressor, the step of controlling the compressor to operate to reduce the operating power of the compressor is continued until the battery cell has no overheating risk.

5. The method of claim 1, wherein, The method further comprises: In the case that the vehicle has a refrigeration demand and the state of charge of the battery cell is greater than or equal to a preset first threshold, the compressor is controlled to normally operate by using a constant speed control or a segmented speed control preset by the vehicle; In the case that the state of charge of the battery cell is less than or equal to a preset third threshold, the compressor is controlled to be prohibited from operating.

6. The method of claim 1, wherein, The method further comprises: determining whether the state of charge of the battery cell increases within a preset time period; if yes, the thermal management control process is continued to be executed; if no, a parked power generation prompt information is generated and sent to an instrument for display to prompt a user to perform parked power generation.

7. A thermal management control system in low battery condition implemented using the method of any one of claims 1-6. The system comprises: a first determining module configured to determine, in the case that the vehicle has a refrigeration demand and the state of charge of the battery cell is less than a preset first threshold, whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold, the preset third threshold being less than the preset second threshold, the preset second threshold being less than the preset first threshold, and the difference among the preset first threshold, the preset second threshold and the preset third threshold satisfying a preset condition; a second determining module configured to determine, in the case that the state of charge of the battery cell is less than the preset second threshold and greater than the preset third threshold, whether the compressor of the vehicle is used to refrigerate the cab and / or the battery cell of the vehicle; a control module configured to, in the case that the cab and the battery cell are refrigerated, control the cab refrigeration stop valve to be prohibited from being closed to prohibit the cab from being refrigerated and perform thermal management on the battery cell, or, in the case that the battery cell is refrigerated, perform thermal management on the battery cell, or, in the case that the cab is refrigerated, control the cab refrigeration stop valve to be prohibited from being closed and the compressor to be prohibited from operating.

8. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, which are suitable for being loaded and executed by the processor to execute the method according to any one of claims 1-6.

9. An electronic device, comprising: comprise: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded and executed by the processor to execute the method according to any one of claims 1-6.

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