Thermal management control method and system under low-electric-quantity working condition, medium and electronic equipment

Abstract

The invention discloses a thermal management control method and system under a low-electric-quantity working condition, a medium and electronic equipment, and the method comprises the steps: judging whether the state of charge of a single battery is smaller than a preset second threshold value and larger than a preset third threshold value or not under the condition that a vehicle has a refrigeration demand and the state of charge of the single battery is smaller than a preset first threshold value; if yes, whether a compressor of the vehicle refrigerates a cab and / or a battery monomer of the vehicle or not is judged; under the condition that the cab and the single battery are refrigerated, a cab refrigeration stop valve is controlled to be forbidden to be closed, and heat management is conducted on the single battery; or under the condition that the battery monomers are refrigerated, performing thermal management on the battery monomers; or under the condition that the cab is refrigerated, the cab refrigeration stop valve is controlled to be forbidden to be closed, and the compressor is controlled to be forbidden to operate. Therefore, by adopting the embodiment of the invention, the working mode of the thermal management system can be dynamically adjusted, and the power consumption is reduced and the energy management of the whole vehicle is optimized on the premise of ensuring that the battery is not overheated.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a thermal management control method, system, medium and electronic equipment under low-power conditions. Background Art

[0002] In the field of hybrid vehicles, e.g. Figure 1 As shown in Figure 1, integrated thermal management systems are widely used because they can effectively integrate the cooling needs of the cabin and the battery. The system usually uses the same compressor, condenser, and condenser fan to meet the cooling needs of the cabin and the battery.

[0003] In related technologies, integrated thermal management systems are usually managed by separate controllers that only consider the cooling needs of the cab or battery, while ignoring the energy management of the entire vehicle. This management method works normally when the battery is sufficient, but when the battery of the entire vehicle is low, the normal operation of the thermal management system may cause the battery to drop further, and eventually cause the vehicle's high-voltage system to shut down, affecting the normal operation of the vehicle. Summary of the invention

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

[0005] In a first aspect, an embodiment of the present application provides a thermal management control method under low power conditions, the method comprising:

[0006] When the vehicle has a cooling demand and the state of charge of the battery cell is less than a preset first threshold, determining 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 meets a preset condition;

[0007] When the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value, determining whether the compressor of the vehicle cools the vehicle's cab and / or the battery cell;

[0008] When cooling the cab and battery cells, the cab cooling shut-off valve is controlled to be prohibited from closing, so as to prohibit cooling of the cab and perform thermal management on the battery cells; or, when cooling the battery cells, thermal management is performed on the battery cells; or, when cooling the cab, the cab cooling shut-off valve is controlled to be prohibited from closing and the compressor is prohibited from running.

[0009] Optionally, the method further includes:

[0010] When the state of charge of the battery cell is greater than or equal to a preset second threshold, obtaining a required speed of the compressor;

[0011] The actual speed of the first compressor is obtained by multiplying the required speed by a preset first correction coefficient;

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

[0013] When the compressor is operating at reduced power, determine whether the battery cells are at risk of overheating;

[0014] When there is no risk of overheating of the battery cell, the thermal management control process is terminated.

[0015] Optionally, thermal management of the battery cells is performed, including:

[0016] Get the required speed of the compressor;

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

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

[0019] When the compressor is operating at reduced power, determine whether there is a risk of overheating of the battery cells;

[0020] When there is no risk of overheating of the battery cell, the thermal management control process is terminated.

[0021] Optionally, determine whether the battery cell has an overheating risk, including:

[0022] Obtain the maximum temperature value of the battery cell in the preset first cycle;

[0023] When the maximum temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second cycle is greater than the maximum temperature value, it is determined that the battery cell has an overheating risk; the second cycle is located after the first cycle;

[0024] Alternatively, when the maximum temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second cycle is less than or equal to the maximum temperature value, it is determined that there is no overheating risk for the battery cell;

[0025] Alternatively, when the maximum temperature value is less than a preset temperature threshold, it is determined that there is no overheating risk for the battery cell.

[0026] Optionally, the method further includes:

[0027] When there is a risk of overheating of the battery cell, the correction factor is adjusted according to a preset step size, and the actual speed of the compressor is recalculated based on the adjusted correction factor;

[0028] According to the recalculated actual rotation speed of the compressor, the step of controlling the operation of the compressor to reduce the operating power of the compressor is continued until there is no risk of overheating of the battery cells.

[0029] Optionally, the method further includes:

[0030] When the vehicle has a cooling demand and the state of charge of the battery cell is greater than or equal to a preset first threshold, the constant speed control or segmented speed control preset by the vehicle is adopted to control the normal operation of the compressor;

[0031] 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 running.

[0032] Optionally, the method further includes:

[0033] Determining whether the state of charge of the battery cell increases within a preset time period;

[0034] If yes, continue with the thermal management control process;

[0035] If not, a parking power generation prompt message is generated and sent to the instrument for display to prompt the user to perform parking power generation.

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

[0037] A first judgment module is used to judge whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold when there is a cooling demand for the vehicle and the state of charge of the battery cell is less than a preset first 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 meets a preset condition;

[0038] A second judgment module, used to judge whether the compressor of the vehicle cools the vehicle's cab 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;

[0039] The control module 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.

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

[0041] In a fourth aspect, an embodiment of the present application provides an electronic device, which may include: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the above-mentioned method steps.

[0042] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0043] 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, thereby optimizing the energy management of the vehicle and improving the reliability of the vehicle.

[0044] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

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

[0047] Figure 2 It is a flow chart of a thermal management control method under low power conditions provided by an embodiment of the present application;

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

[0049] Figure 4This is a schematic diagram of a logic judgment process for cooling a vehicle's cab and / or battery cells provided by the present application;

[0050] Figure 5 is a schematic diagram of the structure of a thermal management control system under low power conditions provided by an embodiment of the present application;

[0051] Figure 6 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following description and the accompanying drawings sufficiently illustrate specific embodiments of the present application to enable those skilled in the art to practice them.

[0053] It should be clear that the described embodiments are only 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 ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0054] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of systems and methods consistent with some aspects of the present application as detailed in the attached claims.

[0055] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not 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, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0056] The present application provides a thermal management control method, system, medium and electronic device under low-power conditions to solve the problems existing in the above-mentioned related technical problems. In the embodiment of the present application, by setting a preset first threshold, a preset second threshold and a preset third threshold for measuring the charge state of the battery cell, when the vehicle has a cooling demand and the vehicle is under low-power conditions, the integrated thermal management working state can be adjusted online to reduce power consumption without overheating the battery, optimize the energy management of the vehicle, and improve the reliability of the vehicle. The following uses an exemplary embodiment to explain in detail.

[0057] The following will be combined with the attached Figure 1 -Attached Figure 4 , a thermal management control method under low power conditions provided by an embodiment of the present application is introduced in detail. The method can be implemented by a computer program and can be run on a thermal management control system under low power conditions based on a von Neumann system. The computer program can be integrated into an application or run as an independent tool application.

[0058] See also Figure 2 , which is a flow chart of a thermal management control method under low power conditions provided by an embodiment of the present application. Figure 2 As shown, the method of the embodiment of the present application may include the following steps:

[0059] S101, when there is a cooling demand for the vehicle and the state of charge of the battery cell is less than a preset first threshold, determining 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 meets a preset condition;

[0060] Among them, cooling demand refers to the situation where the vehicle cab or battery needs to be cooled due to excessive temperature. The state of charge (SOC) is a percentage representation of the remaining battery power, which is used to describe the current power level of the battery. The preset first threshold, the preset second threshold, and the preset third threshold are specific percentage values ​​of the SOC set in advance, which are used to distinguish different power states and trigger different control strategies. The preset condition means that the difference between the preset first threshold, the preset second threshold, and the preset third threshold needs to meet specific requirements. The preset condition can be that the difference between the first threshold, the preset second threshold, and the preset third threshold is 30.

[0061] In some embodiments of the present application, when there is no cooling demand for the vehicle, the process is terminated and the next cycle is waited for to continue determining whether there is a cooling demand.

[0062] In some embodiments of the present application, when the vehicle has a cooling demand and the state of charge of the battery cell is greater than or equal to a preset first threshold, the constant speed control or segmented speed control preset by the vehicle is used to control the normal operation of the compressor. The preset constant speed control or segmented speed control is an existing control method, that is, a normal control method when the SOC is sufficient.

[0063] In some embodiments of the present application, when the vehicle has a cooling demand and the charge state of the battery cell is less than a preset first threshold, it is determined whether the charge state of the battery cell is less than a preset second threshold and greater than a preset third threshold, and the preset third threshold is less than the preset second threshold.

[0064] In some embodiments of the present application, when the charge state of the battery cell is greater than or equal to a preset second threshold value, the required speed of the compressor is obtained; the required speed is multiplied by a preset first correction coefficient to obtain the actual speed of the first compressor; based on the actual speed of the first compressor, the operation of the compressor is controlled 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 thermal management control process is terminated.

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

[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 running.

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

[0068] When it is detected that the vehicle has a cooling demand, if the SOC is greater than or equal to 80%, the vehicle's preset constant speed control or segmented speed control is used to control the compressor to operate normally.

[0069] If the state of charge (SOC) of the battery cell is less than 80%, the system will further check whether the SOC simultaneously meets the conditions of being lower than 40% (the second threshold) and higher than 20% (the third threshold). If the SOC is between 20% and 40%, that is, it meets the condition of 20% < SOC < 40%, the system will determine whether the compressor of the vehicle cools the cab and / or the battery cell of the vehicle. If the SOC is higher than 40%, obtain the required speed of the compressor; multiply the required speed by the preset first correction coefficient to obtain the actual speed of the first compressor; based on the actual speed of the first compressor, control the operation of the compressor 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 with reduced operating power, determine whether there is a risk of overheating of the battery cell; in the case where there is no risk of overheating of the battery cell, end the thermal management control process. If the SOC is lower than 20%, control the compressor to prohibit operation.

[0070] S102, when the state of charge of the battery cell is less than the preset second threshold and greater than the preset third threshold, determine whether the compressor of the vehicle cools the cab and / or the battery cell of the vehicle;

[0071] Among them, in the refrigeration system of the vehicle, the compressor is a mechanical device that raises low-pressure gas to high-pressure gas and is the core component in the refrigeration cycle. The cab refers to the space inside the vehicle for the driver and passengers to ride. The battery cell refers to the battery pack of the vehicle.

[0072] In some embodiments of the present application, first check whether the SOC of the battery cell is lower than 40% (the preset second threshold) and higher than 20% (the preset third threshold). If the SOC is within this range, the system then needs to determine whether the compressor of the vehicle cools the cab and / or the battery cell of the vehicle.

[0073] S103, in the case of cooling the cab and the battery cell, control the cab cooling cut-off valve to prohibit closing to prohibit cooling the cab and perform thermal management on the battery cell; or, in the case of cooling the battery cell, perform thermal management on the battery cell; or in the case of cooling the cab, control the cab cooling cut-off valve to prohibit closing and the compressor to prohibit operation.

[0074] In some embodiments of the present application, the specific process of performing thermal management on the battery cell includes: obtaining the required speed of the compressor; multiplying the required speed by the preset second correction coefficient to obtain the actual speed of the second compressor; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient; based on the actual speed of the second compressor, control the operation of the compressor to reduce the operating power of the compressor; during the operation of the compressor with reduced operating power, determine whether there is a risk of overheating of the battery cell; in the case where there is no risk of overheating of the battery cell, end the thermal management control process.

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

[0076] In some embodiments of the present application, when there is a risk of overheating of the battery cell, 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; 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 until there is no risk of overheating of the battery cell.

[0077] Furthermore, the method also includes: determining whether the state of charge of the battery cell increases within a preset time period; if so, continuing to execute the thermal management control process; if not, generating a parking power generation prompt message and sending it to the instrument for display to prompt the user to perform parking power generation.

[0078] For example, the system monitors the SOC of the battery cells in real time and records the changes in a preset time period (for example, in the past 30 minutes). If the SOC of the battery cells increases within the preset time period, it means that the battery may be charging or the vehicle's energy recovery system is working, and the system will continue to perform thermal management control processes to ensure that the battery temperature remains within a safe range. If the SOC of the battery cells does not increase within the preset time period, that is, the battery power does not increase, the system will generate a parking power generation prompt message. This is because the battery power is low and has not been replenished, which may affect the next trip of the vehicle. The system sends the parking power generation prompt message to the vehicle instrument for display, prompting the user to perform parking power generation to replenish the battery power and maintain the battery health.

[0079] For example Figure 3As shown, it is determined whether there is a refrigeration requirement for the cab or the battery. If not, the process ends. If so, it is determined whether the SOC is lower than the first threshold. If not, the vehicle's preset constant speed control or segmented speed control is adopted to control the normal operation of the compressor (i.e., the compressor speed is equal to the required speed). If so, it is determined whether the state of charge of the battery is less than the preset second threshold. If not, the required speed is multiplied by the correction coefficient A to obtain the actual speed, and based on the actual speed, the compressor is controlled to operate to reduce the operating power of the engine. During the process of the compressor operating with reduced power, the temperature of the battery cell is read, and based on the read temperature, it is determined whether there is a risk of overheating of the battery. If not, the process ends. If so, the correction coefficient A is adjusted, and the required speed is continuously multiplied by the adjusted correction coefficient A until there is no risk of overheating of the battery. If the state of charge of the battery is less than the preset second threshold, it is determined whether the SOC is lower than the third threshold. If so, the compressor is prohibited from working and the process ends. If not, the logical judgment of the refrigeration of the cab and / or the battery cell of the vehicle is carried out. It is further determined whether the SOC increases within the preset time. If it increases, return to continue executing the thermal management control. If it does not increase, the instrument prompts the driver to perform parking power generation.

[0080] For example Figure 4 As shown, it is a schematic diagram of the logical judgment process for the refrigeration of the cab and / or the battery cell of the vehicle. It is determined whether to refrigerate the cab and the battery simultaneously. If not, go to the next step. If so, the cab refrigeration cut-off valve is prohibited from closing, and the cab refrigerant cooling circuit cannot be formed. Only the battery refrigeration is executed, and the compressor operates with reduced power. The compressor speed = the required speed (note that the calculation logic of the required speed at this time is the same as that for single-battery refrigeration, which is the prior art) * the correction coefficient B, where the correction coefficient B < A < 1. At the same time, the temperature of the battery cell is monitored, and it is determined in real time whether there is a risk of overheating of the battery. If there is a risk of overheating, the correction coefficient B is adjusted. The specific adjustment principle is to increase it in a preset proportion while ensuring that B ≤ 1, and then return to continue the judgment. If there is no risk of overheating, the process ends. It is determined whether to refrigerate a single battery. If so, the compressor operates with reduced power. If not, the cab refrigeration cut-off valve is prohibited from closing and the compressor is prohibited from working, and the process ends.

[0081] In the embodiment of the present application, by setting the preset first threshold, preset second threshold, and preset third threshold for measuring the state of charge of the battery cell, when the vehicle has a refrigeration requirement and the vehicle is in a low-battery condition, the working state of the integrated thermal management can be adjusted online, reducing power consumption on the premise of ensuring that the battery does not overheat, optimizing the vehicle's energy management, and improving the reliability of the vehicle.

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

[0083] Please refer to Figure 5 , which shows a schematic diagram of the structure of a thermal management control system under low power conditions provided by an exemplary embodiment of the present application. The thermal management control system under low power 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 judgment module 10, a second judgment module 20, and a control module 30.

[0084] A first judgment module 10 is used to judge whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold when there is a cooling demand for the vehicle and the state of charge of the battery cell is less than a preset first 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 meets a preset condition;

[0085] A second judgment module 20, for judging whether the compressor of the vehicle cools the vehicle's cab and / or the battery cell when the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value;

[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, when cooling the battery cells, perform thermal management on the battery cells; or, when cooling the cab, control the cab cooling stop valve to prohibit closing and the compressor to prohibit running.

[0087] It should be noted that the thermal management control system under low-battery conditions provided in the above-mentioned embodiments 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-mentioned embodiments and the thermal management control method embodiment under low-battery conditions belong to 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-mentioned 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, thereby optimizing the energy management of the vehicle and improving the reliability of the vehicle.

[0090] The present application also provides a computer-readable medium having program instructions stored thereon, which, when executed by a processor, implements the thermal management control method under low-power conditions provided by the above-mentioned various method embodiments.

[0091] The present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the thermal management control method under low power conditions of the above-mentioned various method embodiments.

[0092] See also Figure 6 , is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the electronic device 1000 may 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 these components.

[0094] The user interface 1003 may include a display screen (Display) and a camera (Camera), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.

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

[0096] Among them, the processor 1001 may include one or more processing cores. The processor 1001 uses various interfaces and lines to connect various parts within the entire electronic device 1000, and executes various functions and processes data of the electronic device 1000 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1005, and calling data stored in the memory 1005. Optionally, the processor 1001 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 1001 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1001, and it can be implemented separately through a chip.

[0097] Among them, the memory 1005 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). 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 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 1005 may also be optionally at least one storage system located away from the aforementioned processor 1001. As Figure 6 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a thermal management control application under low power conditions.

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

[0099] When the vehicle has a cooling demand and the state of charge of the battery cell is less than a preset first threshold, determining 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 meets a preset condition;

[0100] When the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value, determining whether the compressor of the vehicle cools the vehicle's cab and / or the battery cell;

[0101] When cooling the cab and battery cells, the cab cooling shut-off valve is controlled to be prohibited from closing, so as to prohibit cooling of the cab and perform thermal management on the battery cells; or, when cooling the battery cells, thermal management is performed on the battery cells; or, when cooling the cab, the cab cooling shut-off valve is controlled to be prohibited from closing and the compressor is prohibited from running.

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

[0103] When the state of charge of the battery cell is greater than or equal to a preset second threshold, obtaining a required speed of the compressor;

[0104] The actual speed of the first compressor is obtained by multiplying the required speed by a preset first correction coefficient;

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

[0106] When the compressor is operating at reduced power, determine whether there is a risk of overheating of the battery cells;

[0107] When there is no risk of overheating of the battery cell, the thermal management control process is terminated.

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

[0109] Get the required speed of the compressor;

[0110] The actual speed of the second compressor is obtained by multiplying the required speed by a preset second correction coefficient; the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient;

[0111] Based on the actual speed of the second compressor, controlling the operation of the compressor to reduce the operating power of the compressor;

[0112] When the compressor is operating at reduced power, determine whether there is a risk of overheating of the battery cells;

[0113] When there is no risk of overheating of the battery cell, the thermal management control process is terminated.

[0114] In one embodiment, when the processor 1001 determines whether a battery cell has an overheating risk, the processor 1001 specifically performs the following operations:

[0115] Obtain the maximum temperature value of the battery cell in the preset first cycle;

[0116] When the maximum temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second cycle is greater than the maximum temperature value, it is determined that the battery cell has an overheating risk; the second cycle is located after the first cycle;

[0117] Alternatively, when the maximum temperature value is greater than or equal to the preset temperature threshold and the temperature of the battery cell in the second cycle is less than or equal to the maximum temperature value, it is determined that there is no overheating risk for the battery cell;

[0118] Alternatively, when the maximum temperature value is less than a preset temperature threshold, it is determined that there is no overheating risk for the battery cell.

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

[0120] When there is a risk of overheating of the battery cell, the correction factor is adjusted according to a preset step size, and the actual speed of the compressor is recalculated based on the adjusted correction factor;

[0121] According to the recalculated actual rotation speed of the compressor, the step of controlling the operation of the compressor to reduce the operating power of the compressor is continued until there is no risk of overheating of the battery cells.

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

[0123] When the vehicle has a cooling demand and the state of charge of the battery cell is greater than or equal to a preset first threshold, the constant speed control or segmented speed control preset by the vehicle is adopted to control the normal operation of the compressor;

[0124] 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 running.

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

[0126] Determining whether the state of charge of the battery cell increases within a preset time period;

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

[0128] If not, a parking power generation prompt message is generated and sent to the instrument for display to prompt the user to perform parking power generation.

[0129] 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, thereby optimizing the energy management of the vehicle and improving the reliability of the vehicle.

[0130] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program for thermal management control under low-power conditions can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium of the program for thermal management control under low-power conditions can be a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0131] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A thermal management control method under low power conditions, characterized in that: The method comprises: When the vehicle has a cooling demand and the state of charge of the battery cell is less than a preset first threshold, determining 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 meets a preset condition; When the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value, determining whether the compressor of the vehicle cools the cab and / or the battery cell of the vehicle; When cooling the cab and the battery cells, the cab cooling shut-off valve is controlled to be prohibited from closing, so as to prohibit cooling of the cab and perform thermal management on the battery cells; or, when cooling the battery cells, thermal management is performed on the battery cells; or, when cooling the cab, the cab cooling shut-off valve is controlled to be prohibited from closing and the compressor is prohibited from running.

2. The method according to claim 1, characterized in that The method further comprises: When the state of charge of the battery cell is greater than or equal to a preset second threshold, obtaining a required speed of the compressor; The required speed is multiplied by a preset first correction coefficient to obtain an actual speed of the first compressor; Based on the actual speed of the first compressor, the operation of the compressor is controlled 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 reducing the operating power, determining whether the battery cell has an overheating risk; When there is no risk of overheating of the battery cell, the thermal management control process is ended.

3. The method according to claim 1, characterized in that The thermal management of the battery cell includes: Get the required speed of the compressor; The actual speed of the second compressor is obtained by multiplying the required speed by a preset second correction coefficient, wherein the preset second correction coefficient is less than or equal to 1 and less than the preset first correction coefficient; Based on the actual speed of the second compressor, controlling the operation of the compressor to reduce the operating power of the compressor; During the operation of the compressor reducing the operating power, determining whether the battery cell has an overheating risk; When there is no risk of overheating of the battery cell, the thermal management control process is terminated.

4. The method according to claim 2 or 3, characterized in that: Determining whether the battery cell has an overheating risk includes: Obtaining the maximum temperature value of the battery cell within a preset first cycle; When the maximum temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery cell in the second cycle is greater than the maximum temperature value, it is determined that the battery cell has an overheating risk; and the second cycle is located after the first cycle; Alternatively, when the maximum temperature value is greater than or equal to a preset temperature threshold and the temperature of the battery cell in the second cycle is less than or equal to the maximum temperature value, it is determined that the battery cell does not have an overheating risk; Alternatively, when the maximum temperature value is less than a preset temperature threshold, it is determined that the battery cell does not have an overheating risk.

5. The method according to claim 2 or 3, characterized in that: The method further comprises: When the battery cell is at risk of overheating, the correction coefficient is adjusted according to a preset step length, and the actual speed of the compressor is recalculated based on the adjusted correction coefficient; According to the recalculated actual rotation speed of the compressor, the step of controlling the operation of the compressor to reduce the operating power of the compressor is continued until there is no risk of overheating of the battery cells.

6. The method according to claim 1, characterized in that The method further comprises: When the vehicle has a cooling demand and the state of charge of the battery cell is greater than or equal to a preset first threshold, the constant speed control or segmented speed control preset by the vehicle is adopted to control the normal operation of the compressor; 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 running.

7. The method according to claim 1, characterized in that The method further comprises: Determining whether the state of charge of the battery cell increases within a preset time period; If yes, continue with the thermal management control process; If not, a parking power generation prompt message is generated and sent to the instrument for display to prompt the user to perform parking power generation.

8. A thermal management control system under low power conditions, characterized in that: The system comprises: A first judgment module is used to judge whether the state of charge of the battery cell is less than a preset second threshold and greater than a preset third threshold when there is a cooling demand for the vehicle and the state of charge of the battery cell is less than a preset first 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 meets a preset condition; A second judgment module, configured to judge whether the compressor of the vehicle cools the cab and / or the battery cell of the vehicle when the state of charge of the battery cell is less than a preset second threshold value and greater than a preset third threshold value; A control module is used to control the cab cooling stop valve to prohibit closing when the cab and the battery cells are cooled, so as to prohibit cooling of the cab and perform thermal management on the battery cells; or to perform thermal management on the battery cells when the battery cells are cooled; or to control the cab cooling stop valve to prohibit closing and the compressor to prohibit operation when the cab is cooled.

9. A computer storage medium, characterized in that: The computer storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: include: A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the method according to any one of claims 1 to 7.

Images