Battery thermal management method and device, vehicle-mounted terminal and vehicle

Abstract

The invention is suitable for the technical field of automobiles, and provides a battery thermal management method and device, a vehicle-mounted terminal and a vehicle. Determining a driving condition of the vehicle based on the driving information; determining a power consumption range of the battery based on the driving information; based on the driving working condition and the electric quantity consumption range, determining a thermal management threshold value of the battery; and if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, performing thermal management control corresponding to the thermal management threshold on the battery. Compared with the prior art, according to the method, the heat management threshold value corresponding to the battery at the moment can be flexibly determined in combination with the driving working condition and the electric quantity consumption range, heat management control over the battery can be flexibly executed in combination with the heat management threshold value, and therefore unnecessary energy consumption is reduced, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and in particular relates to a battery thermal management method, device, vehicle-mounted terminal and vehicle. Background Art

[0002] At present, the power battery of a vehicle has the phenomenon of limited discharge power, increased risk of thermal runaway and irreversible lithium deposition under high and low temperatures. Therefore, the existing technology usually sets a high temperature threshold and a low temperature threshold, and cools the battery when it detects that the battery temperature is greater than the high temperature threshold, and heats the battery when the battery temperature is lower than the low temperature threshold, so as to avoid problems with the power battery due to high and low temperature environments.

[0003] However, the prior art simply implements thermal management control of the battery based on the above-mentioned fixed threshold value, which is not comprehensive enough and difficult to meet actual needs, thereby increasing energy consumption and reducing energy utilization efficiency. Summary of the invention

[0004] The embodiments of the present application provide a battery thermal management method, device, vehicle-mounted terminal and vehicle to solve the problem that the prior art is not comprehensive enough and difficult to meet actual needs, thereby increasing energy consumption and reducing energy utilization efficiency.

[0005] In a first aspect, an embodiment of the present application provides a battery thermal management method, comprising:

[0006] Obtain vehicle driving information;

[0007] Determining a driving condition of the vehicle based on the driving information; the driving condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement of the battery of the vehicle;

[0008] Determining a power consumption range of the battery based on the driving information;

[0009] Determining a thermal management threshold of the battery based on the driving condition and the power consumption range;

[0010] If the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, thermal management control corresponding to the thermal management threshold is performed on the battery.

[0011] Optionally, the driving information includes a current position and a destination of the vehicle; and determining the driving condition of the vehicle based on the driving information includes:

[0012] Calculating the travel distance of the vehicle according to the current position and the destination;

[0013] Obtaining a historical discharge power set corresponding to the vehicle traveling the driving distance within a historical time period;

[0014] Based on the historical discharge power set, a target discharge power corresponding to the driving distance is calculated;

[0015] If the driving distance is less than or equal to a distance threshold, and the target discharge power is less than or equal to a power threshold, it is determined that the driving condition is short-distance driving and has a low power requirement.

[0016] Optionally, the calculating, based on the historical discharge power set, a target discharge power corresponding to the driving distance includes:

[0017] Performing mean processing on each historical discharge power in the historical discharge power set to obtain an average discharge power;

[0018] The average discharge power and the preset power factor are calculated to obtain the target discharge power.

[0019] Optionally, the driving information includes the speed, current location, destination, health status of the battery, and current power of the battery of the vehicle; and determining the power consumption range of the battery based on the driving information includes:

[0020] Calculating the travel distance of the vehicle according to the current position and the destination;

[0021] Calculating the driving time of the vehicle according to the vehicle speed and the driving distance;

[0022] Calculating a target power level of the battery when the vehicle reaches the destination based on the driving time, the current power level, and the battery health status;

[0023] The power consumption range is determined according to the current power and the target power.

[0024] Optionally, determining the thermal management threshold of the battery based on the driving condition and the power consumption range includes:

[0025] If the driving condition is short-distance driving and the discharge power requirement is low, determining a target discharge power corresponding to the discharge power requirement;

[0026] Searching for a target battery temperature corresponding to the target discharge power and the power consumption range from a preset power table; the preset power table is used to describe the relationship between the discharge power, power range and battery temperature of the battery;

[0027] The thermal management threshold is calculated based on the target battery temperature and a preset amplitude threshold.

[0028] Optionally, the thermal management threshold includes a heating start threshold; if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, performing thermal management control on the battery corresponding to the thermal management threshold, including:

[0029] If the current temperature is less than the heating start threshold, a heating operation is performed on the battery.

[0030] Optionally, before obtaining the driving information of the vehicle, the method further includes:

[0031] performing a heating operation on the battery;

[0032] The thermal management threshold includes a heating off threshold, and if the current temperature of the battery meets a judgment condition corresponding to the thermal management threshold, thermal management control corresponding to the thermal management threshold is performed on the battery, including:

[0033] Acquiring a target temperature of the battery after heating;

[0034] If the target temperature is greater than or equal to the heating shutdown threshold, the heating operation of the battery is stopped.

[0035] In a second aspect, an embodiment of the present application provides a battery thermal management device, including:

[0036] A first acquisition unit, used to acquire driving information of a vehicle;

[0037] A first operating condition determination unit, configured to determine a driving operating condition of the vehicle based on the driving information; the driving operating condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement of the battery of the vehicle;

[0038] A first range determination unit, configured to determine a power consumption range of the battery based on the driving information;

[0039] a threshold determination unit, configured to determine a thermal management threshold of the battery based on the driving condition and the power consumption range;

[0040] The control unit is configured to perform thermal management control on the battery corresponding to the thermal management threshold if the current temperature of the battery meets a judgment condition corresponding to the thermal management threshold.

[0041] In a third aspect, an embodiment of the present application provides a vehicle-mounted terminal, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a battery thermal management method as described in any one of the first aspects above is implemented.

[0042] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery thermal management method as described in any one of the above-mentioned first aspects is implemented.

[0043] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a vehicle-mounted terminal, enables the vehicle-mounted terminal to execute the battery thermal management method described in any one of the above-mentioned first aspects.

[0044] In a sixth aspect, an embodiment of the present application provides a vehicle, comprising an on-board terminal, wherein the on-board terminal is used to execute the battery thermal management method as described in any one of the first aspects.

[0045] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0046] A battery thermal management method provided in an embodiment of the present application obtains driving information of a vehicle; based on the driving information, determines the driving condition of the vehicle; the driving condition is used to describe the length of the vehicle's driving distance and the discharge power requirement for the vehicle's battery; based on the driving information, determines the power consumption range of the battery; based on the driving condition and the power consumption range, determines the thermal management threshold of the battery; if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, the battery is subjected to thermal management control corresponding to the thermal management threshold. Compared with the prior art that can only simply implement thermal management control of the battery based on a fixed threshold, the present method can flexibly determine the thermal management threshold corresponding to the battery at this time in combination with the driving condition and the power consumption range, so that the thermal management threshold determined at this time is more in line with the current driving condition of the vehicle; thereafter, the thermal management control of the battery can be flexibly performed in combination with the thermal management threshold, so that the thermal management control at this time is more in line with the current driving condition, thereby reducing unnecessary energy consumption and improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 is a flow chart of an implementation of a battery thermal management method provided in an embodiment of the present application;

[0049] Figure 2 is a flow chart of an implementation of a battery thermal management method provided by another embodiment of the present application;

[0050] Figure 3 is a flow chart of an implementation of a battery thermal management method provided in yet another embodiment of the present application;

[0051] Figure 4 is a flow chart of an implementation of a battery thermal management method provided by another embodiment of the present application;

[0052] Figure 5 is a schematic structural diagram of a battery thermal management device provided in one embodiment of the present application;

[0053] Figure 6 It is a structural diagram of a vehicle-mounted terminal provided in one embodiment of the present application. DETAILED DESCRIPTION

[0054] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0055] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0056] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0057] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0058] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0059] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0060] At present, the power batteries of vehicles have limited discharge power, increased risk of thermal runaway and irreversible lithium deposition under high and low temperatures. Therefore, the existing technology usually sets thermal management thresholds (such as high temperature thresholds and low temperature thresholds) and performs thermal management control based on the fixed thresholds to avoid problems with the power batteries due to high and low temperature environments.

[0061] However, the prior art simply implements thermal management control of the battery (such as turning on or off cooling / heating, etc.) based on the above-mentioned fixed high temperature threshold and low temperature threshold, which is not comprehensive enough. For example, during short-distance low-load driving, the battery often has not yet been cooled or heated, and the driving behavior has ended; or, during short-distance low-load driving, it is actually only necessary to perform a lower degree of thermal management control on the battery, but the fixed and mechanized battery thermal management of the prior art exacerbates energy waste. It can be seen that the prior art is difficult to meet actual needs, thereby increasing energy consumption and reducing energy utilization efficiency.

[0062] Based on this, in all embodiments of the present application, a battery thermal management method is provided, which can flexibly perform thermal management control on the battery of the vehicle so that the thermal management control on the battery is more in line with the current driving conditions. The specific implementation process of the above battery thermal management method can be seen in detail. Figure 1 to Figure 4 The corresponding embodiments are not described in detail here.

[0063] It should be noted that the vehicles in all embodiments of the present application are vehicles equipped with batteries.

[0064] See also Figure 1 , Figure 1 This is a flow chart of a battery thermal management method according to an embodiment of the present application. In the embodiment of the present application, the execution subject of the battery thermal management method is a vehicle-mounted terminal.

[0065] like Figure 1 As shown, the battery thermal management method provided in one embodiment of the present application may include S101 to S105, which are described in detail as follows:

[0066] In S101, the driving information of the vehicle is obtained.

[0067] In actual applications, in order to achieve thermal management of the vehicle's battery, the user can send a battery thermal management request to the vehicle terminal.

[0068] In an embodiment of the present application, the vehicle terminal detecting a battery thermal management request may include: detecting a preset operation for the vehicle terminal. The preset operation may be determined according to actual needs and is not limited here. Exemplarily, the preset operation may be: a preset control of the vehicle terminal is triggered. Based on this, when the vehicle terminal detects that its own preset control is triggered, it indicates that the preset operation is detected, that is, the above-mentioned battery thermal management request is detected.

[0069] After detecting the battery thermal management request, the vehicle terminal can obtain the vehicle's driving information, wherein the driving information includes but is not limited to: the vehicle's current location and destination.

[0070] In one implementation of the embodiment of the present application, the vehicle-mounted terminal can determine the current location of the vehicle through the vehicle-mounted navigation system to which it is wirelessly connected.

[0071] In another implementation of the embodiment of the present application, a user in a vehicle can input a destination on a display screen of the vehicle, based on which the vehicle-mounted terminal can determine the destination of the vehicle through a display screen connected thereto by wireless communication.

[0072] In S102, based on the driving information, the driving condition of the vehicle is determined; the driving condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement for the battery of the vehicle.

[0073] In the embodiment of the present application, the vehicle-mounted terminal can determine the driving condition of the vehicle based on the acquired driving information, wherein the driving condition is used to describe the length of the vehicle's driving distance and the discharge power requirement of the vehicle's battery.

[0074] It should be noted that the driving conditions of the vehicle include but are not limited to: short-distance driving with low power requirements and long-distance driving with high power requirements.

[0075] In one embodiment of the present application, since the neural network model has a high accuracy in determining the driving condition, in order to improve the accuracy of determining the driving condition of the vehicle, the vehicle-mounted terminal can directly input the above driving information into the trained driving condition detection model for processing, thereby determining the driving condition of the vehicle. The driving condition detection model is obtained by training a pre-built neural network model.

[0076] In this embodiment, the driving condition detection model can be obtained by training a pre-constructed neural network model based on a preset sample set. Each sample data in the preset sample set includes sample driving information and a sample driving condition corresponding to the sample driving information. When training the pre-constructed neural network model, the sample driving information in each sample data is used as the input of the neural network model, and the sample driving condition corresponding to the sample driving information in each sample data is used as the output of the neural network model. Through training, the neural network model can learn the correspondence between all possible sample driving information and sample driving conditions, and the trained neural network model is used as the driving condition detection model.

[0077] In another embodiment of the present application, since the construction of a neural network model usually requires a large amount of historical data, and a large amount of historical data needs to be trained to obtain the final model, and the model occupies a large amount of memory, therefore, in order to improve the determination rate of the driving condition, improve the working efficiency of the vehicle terminal, and reduce memory consumption, when the driving information includes the current position and destination of the vehicle, the vehicle terminal can also use Figure 2 Steps S201 to S204 shown determine the driving conditions of the vehicle, as described in detail below:

[0078] In S201, the travel distance of the vehicle is calculated based on the current position and the destination.

[0079] In S202, a historical discharge power set corresponding to the vehicle traveling the driving distance within a historical time period is obtained.

[0080] In S203, based on the historical discharge power set, a target discharge power corresponding to the driving distance is calculated.

[0081] In S204, if the driving distance is less than or equal to the distance threshold, and the target discharge power is less than or equal to the power threshold, it is determined that the driving condition is short-distance driving and the power requirement is low.

[0082] In this embodiment, the vehicle terminal can calculate the actual driving distance of the vehicle according to the current location and destination of the vehicle. Afterwards, the vehicle terminal can obtain the historical discharge power set of the battery of the vehicle when the vehicle travels the same historical distance as the driving distance within the historical time period. The historical time period can be determined according to actual needs and is not limited here.

[0083] The historical discharge power set includes the historical discharge power of the battery each time the vehicle travels the above historical distance within the historical time period.

[0084] In one embodiment of the present application, after obtaining the historical discharge power set, in order to improve work efficiency, the vehicle-mounted terminal can count the number of occurrences of different historical discharge powers in the historical discharge power set, and directly determine the historical discharge power with the largest number of occurrences as the target discharge power corresponding to the vehicle's driving distance.

[0085] In another embodiment of the present application, since in practical applications, the mean is used to describe the average level or central trend of a set of data, therefore, in order to improve the accuracy of determining the target discharge power, the vehicle terminal can also determine the target discharge power according to the following steps, which are described in detail as follows:

[0086] Performing mean processing on each historical discharge power in the historical discharge power set to obtain an average discharge power;

[0087] The average discharge power and the preset power factor are calculated to obtain the target discharge power.

[0088] In this embodiment, the vehicle-mounted terminal may perform mean processing on each historical discharge power in the historical discharge power set to obtain an average discharge power.

[0089] In some possible embodiments, in order to improve the working efficiency of the vehicle-mounted terminal, the vehicle-mounted terminal may directly determine the above average discharge power as the target discharge power.

[0090] In some other possible embodiments, since the discharge power of the battery is not exactly the same for the same driving distance, that is, the discharge power of the battery fluctuates, in order to ensure that the vehicle can complete the driving of the vehicle at the target discharge power, the vehicle terminal can calculate the average discharge power and the preset power coefficient to obtain the target discharge power. The preset power coefficient can be determined according to actual needs and is not limited here.

[0091] It should be noted that the preset power coefficient is used to indicate the degree of fluctuation of the discharge power. The preset power coefficient is greater than 1.

[0092] Exemplarily, assuming that the preset power factor is 1.1, the target discharge power=average discharge power*preset power factor.

[0093] In this embodiment, after obtaining the actual driving distance of the vehicle and the target discharge power corresponding to the driving distance, the vehicle terminal can compare the driving distance with the distance threshold and compare the target discharge power with the power threshold. The distance threshold is used to indicate the threshold corresponding to a short distance, and the power threshold is used to indicate the threshold corresponding to a low power requirement.

[0094] When the vehicle-mounted terminal detects that the driving distance is less than or equal to the distance threshold and the target discharge power is less than or equal to the power threshold, it means that the actual driving distance of the vehicle is short and the discharge power requirement corresponding to the driving distance is low. Therefore, the vehicle-mounted terminal can determine that the driving condition of the vehicle at this time is short-distance driving and low power requirement.

[0095] In S103, based on the driving information, a power consumption range of the battery is determined.

[0096] In the embodiment of the present application, in combination with S101, the driving information of the vehicle includes the current position and destination of the vehicle, so the vehicle terminal can calculate the actual driving distance of the vehicle according to the current position and destination of the vehicle, and input the driving distance into the trained power detection model for processing to obtain the battery power consumption range corresponding to the driving distance. The power detection model is trained by a pre-built deep learning model.

[0097] In this embodiment, the power detection model can be obtained by training a pre-built deep learning model based on a preset sample set. Each sample data in the preset sample set includes a sample driving distance and a sample power consumption range corresponding to the sample driving distance. When training the pre-built deep learning model, the sample driving distance in each sample data is used as the input of the deep learning model, and the sample power consumption range corresponding to the sample driving distance in each sample data is used as the output of the deep learning model. Through training, the deep learning model can learn the correspondence between all possible sample driving distances and sample power consumption ranges, and the trained deep learning model is used as the power detection model.

[0098] In one embodiment of the present application, when the driving information includes the vehicle speed, current location, destination, battery health status and current battery power, since the construction of the neural network model usually requires a large amount of historical data, and a large amount of historical data needs to be trained to obtain the final model, and the model occupies a large amount of memory, therefore, in order to improve the calculation accuracy of the power consumption range without building a model, the vehicle terminal can also use the following method: Figure 3 Steps S301 to S304 shown determine the power consumption range, as detailed below:

[0099] In S301, the travel distance of the vehicle is calculated based on the current position and the destination.

[0100] In S302, the driving time of the vehicle is calculated according to the vehicle speed and the driving distance.

[0101] It should be noted that the current power specifically refers to the power of the battery when the vehicle is in the current position.

[0102] Battery State of Health (SOH) is used to describe the performance and remaining life of the battery

[0103] In this embodiment, the vehicle terminal can calculate the actual travel distance of the vehicle according to the current position and destination of the vehicle. Afterwards, the vehicle terminal can calculate the travel time of the vehicle from the current position to the destination according to the vehicle speed and the travel distance.

[0104] In some possible embodiments, the vehicle terminal may obtain a historical speed set of the vehicle when the vehicle travels the same historical distance as the travel distance within a historical time period. The historical time period may be determined according to actual needs and is not limited here.

[0105] The historical vehicle speed set includes the historical vehicle speed of the vehicle each time the vehicle travels the above historical distance within the historical time period.

[0106] In this embodiment, the vehicle-mounted terminal performs mean processing on all historical vehicle speeds in the historical vehicle speed set to obtain an average vehicle speed, and determines the average vehicle speed as the vehicle speed at this time.

[0107] In S303, based on the driving time, the current power level and the battery health status, a target power level of the battery when the vehicle reaches the destination is calculated.

[0108] In S304, the power consumption range is determined according to the current power and the target power.

[0109] In this embodiment, the vehicle-mounted terminal can import the vehicle's driving time, the current battery power, and the battery health status into a preset formula for calculation, thereby obtaining the target battery power when the vehicle arrives at the destination.

[0110] The preset formula is as follows:

[0111] SOC d =SOC0-I*t / (C0*SOH);

[0112] Among them, SOC d It represents the target power of the battery when the vehicle arrives at the destination, SOC0 represents the current power of the battery, I represents the target current of the battery, SOH represents the battery health state, C0 represents the rated capacity of the battery, and t represents the driving time of the vehicle.

[0113] In some possible embodiments, the vehicle-mounted terminal may obtain a historical current set of the battery of the vehicle when the vehicle travels a historical distance that is the same as the driving distance within a historical time period.

[0114] The historical current set includes the historical current of the battery each time the vehicle travels the historical distance within the historical time period.

[0115] In this embodiment, the vehicle-mounted terminal performs mean processing on all historical currents in the historical current set to obtain an average current, and determines the average current as the target current of the battery.

[0116] In this embodiment, after obtaining the target power, the vehicle terminal can determine the power consumption range of the battery according to the current power and the target power, that is, the power consumption range is: [current power, target power].

[0117] In S104 , a thermal management threshold of the battery is determined based on the driving condition and the power consumption range.

[0118] In an embodiment of the present application, after determining the driving condition of the vehicle and the power consumption range of the battery, the vehicle-mounted terminal can determine the thermal management threshold of the battery based on the driving condition and the power consumption range.

[0119] In practical applications, battery thermal management includes heating operations, so the thermal management thresholds include but are not limited to: a heating-on threshold and a heating-off threshold.

[0120] In one embodiment of the present application, during short-distance low-load driving, the battery often has not yet been cooled or heated, and the driving behavior has ended; or, during short-distance low-load driving, only a lower degree of thermal management control is actually required for the battery, and the thermal management control is usually related to the discharge power of the battery. Therefore, in order to improve the accuracy of determining the thermal management threshold, the vehicle terminal can specifically determine the thermal management threshold of the battery according to the following steps, which are detailed as follows:

[0121] If the driving condition is short-distance driving and the discharge power requirement is low, determining a target discharge power corresponding to the discharge power requirement;

[0122] Searching for a target battery temperature corresponding to the target discharge power and the power consumption range from a preset power table; the preset power table is used to describe the relationship between the discharge power, power range and battery temperature of the battery;

[0123] The thermal management threshold is calculated based on the target battery temperature and a preset amplitude threshold.

[0124] In this embodiment, when the vehicle terminal detects that the vehicle is in a short-distance driving condition and has a low discharge power requirement, it can obtain the target discharge power corresponding to the discharge power requirement of the battery at this time. After that, the vehicle terminal can find the target battery temperature corresponding to the target discharge power and power consumption range from the preset power table. The preset power table is used to describe the relationship between the battery discharge power, power range and battery temperature.

[0125] It should be noted that the target battery temperature specifically refers to the lowest temperature corresponding to the target discharge power within the power consumption range.

[0126] In this embodiment, since the thermal management threshold includes a heating on threshold and a heating off threshold, the vehicle terminal can directly determine the heating on threshold based on the target battery temperature, and determine the sum of the target battery temperature and the preset amplitude threshold as the heating off threshold. The preset amplitude threshold can be determined according to actual needs and is not limited here. For example, the preset amplitude threshold can be 2°C.

[0127] In S105 , if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, thermal management control corresponding to the thermal management threshold is performed on the battery.

[0128] In an embodiment of the present application, after determining the thermal management threshold, the vehicle-mounted terminal may compare the current temperature of the battery with the thermal management threshold, determine corresponding thermal management control according to the comparison result, and execute corresponding thermal management control.

[0129] Specifically, when the thermal management threshold includes a heating start-up threshold, the vehicle terminal detects that the current temperature of the battery is lower than the heating start-up threshold, indicating that the battery temperature is too low to meet the vehicle's driving conditions at this time. Therefore, the vehicle terminal can perform heating operations on the battery.

[0130] In some possible embodiments, when the thermal management threshold includes a heating shutdown threshold, when the vehicle-mounted terminal detects that the current temperature of the battery is greater than or equal to the heating shutdown threshold, it indicates that the temperature of the battery at this time can meet the driving conditions of the vehicle at this time. Therefore, in order to avoid increasing unnecessary energy consumption, the vehicle-mounted terminal does not need to perform heating operations on the battery at this time.

[0131] From the above, it can be seen that a battery thermal management method provided by an embodiment of the present application obtains the driving information of the vehicle; based on the driving information, the driving condition of the vehicle is determined; the driving condition is used to describe the length of the vehicle's driving distance and the discharge power requirement for the vehicle's battery; based on the driving information, the power consumption range of the battery is determined; based on the driving condition and the power consumption range, the thermal management threshold of the battery is determined; if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, the battery is subjected to thermal management control corresponding to the thermal management threshold. Compared with the prior art that can only simply implement thermal management control of the battery based on a fixed threshold, the present method can flexibly determine the thermal management threshold corresponding to the battery at this time in combination with the driving condition and the power consumption range, so that the thermal management threshold determined at this time is more in line with the current driving condition of the vehicle; thereafter, the thermal management control of the battery can be flexibly performed in combination with the thermal management threshold, so that the thermal management control at this time is more in line with the current driving condition, thereby reducing unnecessary energy consumption and improving energy utilization efficiency.

[0132] In one embodiment of the present application, when the battery of the vehicle is already in the heating stage, in order to stop the heating operation of the battery in time to avoid meaningless heating of the battery, thereby reducing energy consumption and improving energy utilization efficiency, the thermal management threshold may also include a heating shutdown threshold. Therefore, the vehicle terminal may specifically perform the following operations: Figure 4 Steps S401 to S403 are shown.

[0133] Based on this, see Figure 4 , Figure 4 FIG. 1 is a flowchart of a battery thermal management method according to another embodiment of the present invention. Figure 1 Correspondingly, before step S101, this embodiment may further include S401. Accordingly, step S105 may specifically include: S402 to S403, which are described in detail as follows:

[0134] In S401, a heating operation is performed on the battery.

[0135] In S402, the target temperature of the battery after heating is obtained.

[0136] In S403 , if the target temperature is greater than or equal to the heating off threshold, the heating operation on the battery is stopped.

[0137] In this embodiment, before step S101, when the vehicle terminal detects that the temperature of the battery of the vehicle is too low, in order to avoid problems with the battery of the vehicle due to the low temperature environment, the vehicle terminal can heat the battery.

[0138] Afterwards, the vehicle-mounted terminal may continue to execute steps S101 to S104 to determine a heating shutdown threshold of the battery.

[0139] In this embodiment, after performing a heating operation on the battery, the vehicle-mounted terminal may obtain the target temperature of the battery after heating in real time, and compare the target temperature with the heating shut-off threshold determined above.

[0140] When the vehicle terminal detects that the current temperature of the battery is greater than or equal to the heating shutdown threshold, it means that the battery temperature at this time can meet the driving conditions of the vehicle at this time, that is, heating the battery at this time does not significantly improve the vehicle's dynamic performance and increases unnecessary energy consumption. Therefore, the vehicle terminal can stop the heating operation of the battery at this time.

[0141] From the above, it can be seen that the battery thermal management method provided in this embodiment can compare the target temperature of the battery after heating with the determined heating shutdown threshold in real time after performing a heating operation on the battery, and stop the heating operation on the battery in time when it is detected that the current temperature of the battery is greater than or equal to the heating shutdown threshold, so as to avoid meaningless heating of the battery, thereby reducing energy consumption and improving energy utilization efficiency.

[0142] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0143] Corresponding to a battery thermal management method described in the above embodiment, Figure 5 The structure diagram of a battery thermal management device provided by an embodiment of the present application is shown. For the convenience of explanation, only the part related to the embodiment of the present application is shown. Figure 5 The battery thermal management device 500 includes: a first acquisition unit 51, a first operating condition determination unit 52, a first range determination unit 53, a threshold determination unit 54 and a control unit 55.

[0144] in:

[0145] The first acquisition unit 51 is used to acquire the driving information of the vehicle.

[0146] The first operating condition determination unit 52 is used to determine the driving operating condition of the vehicle based on the driving information; the driving operating condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement for the battery of the vehicle.

[0147] The first range determination unit 53 is used to determine the power consumption range of the battery based on the driving information.

[0148] The threshold determination unit 54 is used to determine the thermal management threshold of the battery based on the driving condition and the power consumption range.

[0149] The control unit 55 is configured to perform thermal management control on the battery corresponding to the thermal management threshold if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold.

[0150] In one embodiment of the present application, the driving information includes the current location and destination of the vehicle; the first operating condition determination unit 52 specifically includes: a first distance calculation unit, a second acquisition unit, a first power calculation unit and a second operating condition determination unit. Among them:

[0151] The first distance calculation unit is used to calculate the travel distance of the vehicle according to the current position and the destination.

[0152] The second acquisition unit is used to acquire a historical discharge power set corresponding to the driving distance traveled by the vehicle within a historical time period.

[0153] The first power calculation unit is used to calculate the target discharge power corresponding to the driving distance based on the historical discharge power set.

[0154] The second operating condition determination unit is used to determine that the driving condition is short-distance driving with low power requirement if the driving distance is less than or equal to a distance threshold and the target discharge power is less than or equal to a power threshold.

[0155] In one embodiment of the present application, the first power calculation unit specifically includes: a processing unit and a second power calculation unit.

[0156] The processing unit is used for performing mean processing on each historical discharge power in the historical discharge power set to obtain an average discharge power.

[0157] The second power calculation unit is used to calculate the average discharge power and the preset power coefficient to obtain the target discharge power.

[0158] In one embodiment of the present application, the driving information includes the vehicle speed, current location, destination, battery health status, and current battery power of the vehicle; the first range determination unit 43 specifically includes: a second distance calculation unit, a time calculation unit, a power calculation unit, and a second range determination unit. Among them:

[0159] The second distance calculation unit is used to calculate the travel distance of the vehicle according to the current position and the destination.

[0160] The time calculation unit is used to calculate the driving time of the vehicle according to the vehicle speed and the driving distance.

[0161] The power calculation unit is used to calculate the target power of the battery when the vehicle reaches the destination based on the driving time, the current power and the battery health status.

[0162] The second range determination unit is used to determine the power consumption range according to the current power and the target power.

[0163] In one embodiment of the present application, the threshold determination unit 54 specifically includes: a power determination unit, a search unit and a threshold calculation unit. Among them:

[0164] The power determination unit is used for determining a target discharge power corresponding to the discharge power requirement if the driving condition is short-distance driving and the discharge power requirement is low.

[0165] The search unit is used to search for a target battery temperature corresponding to the target discharge power and the power consumption range from a preset power table; the preset power table is used to describe the relationship between the discharge power, power range and battery temperature of the battery.

[0166] The threshold calculation unit is used to calculate the thermal management threshold based on the target battery temperature and a preset amplitude threshold.

[0167] In one embodiment of the present application, the thermal management threshold includes a heating start threshold; the control unit 55 specifically includes: a first heating unit. Among them:

[0168] The first heating unit is configured to perform a heating operation on the battery when the thermal management threshold includes a heating-on threshold and if the current temperature is less than the heating-on threshold.

[0169] In one embodiment of the present application, the thermal management threshold includes a heating shutdown threshold, and the battery thermal management device 500 further includes: a second heating unit, and correspondingly, the control unit 55 specifically includes: a third acquisition unit and a stop unit.

[0170] The second heating unit is used to heat the battery.

[0171] The third acquisition unit is used to acquire the target temperature after the battery is heated.

[0172] The stopping unit is configured to stop the heating operation on the battery if the target temperature is greater than or equal to the heating shut-off threshold.

[0173] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0174] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0175] Figure 6 This is a schematic diagram of the structure of a vehicle-mounted terminal provided in one embodiment of the present application. Figure 6 As shown, the vehicle terminal 6 of this embodiment includes: at least one processor 60 ( Figure 6 Only one is shown in the figure) a processor, a memory 61, and a computer program 62 stored in the memory 61 and executable on the at least one processor 60, wherein the processor 60 implements the steps in any of the above-mentioned battery thermal management method embodiments when executing the computer program 62.

[0176] The vehicle terminal may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will appreciate that Figure 6 It is only an example of the vehicle-mounted terminal 6 and does not constitute a limitation on the vehicle-mounted terminal 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, for example, it may also include input and output devices, network access devices, etc.

[0177] The processor 60 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0178] In some embodiments, the memory 61 may be an internal storage unit of the vehicle-mounted terminal 6, such as the memory of the vehicle-mounted terminal 6. In other embodiments, the memory 61 may also be an external storage device of the vehicle-mounted terminal 6, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the vehicle-mounted terminal 6. Further, the memory 61 may also include both the internal storage unit of the vehicle-mounted terminal 6 and an external storage device. The memory 61 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program, etc. The memory 61 may also be used to temporarily store data that has been output or is to be output.

[0179] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0180] An embodiment of the present application provides a computer program product. When the computer program product runs on a vehicle-mounted terminal, the vehicle-mounted terminal can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0181] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the vehicle-mounted terminal, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0182] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0183] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery thermal management method, characterized in that: include: Obtain vehicle driving information; Based on the driving information, determining the driving condition of the vehicle; The driving condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement of the battery of the vehicle; Determining a power consumption range of the battery based on the driving information; Determining a thermal management threshold of the battery based on the driving condition and the power consumption range; If the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, thermal management control corresponding to the thermal management threshold is performed on the battery.

2. The battery thermal management method according to claim 1, characterized in that: The driving information includes a current position and a destination of the vehicle; and determining the driving condition of the vehicle based on the driving information includes: Calculating the travel distance of the vehicle according to the current position and the destination; Obtaining a historical discharge power set corresponding to the vehicle traveling the driving distance within a historical time period; Based on the historical discharge power set, a target discharge power corresponding to the driving distance is calculated; If the driving distance is less than or equal to a distance threshold, and the target discharge power is less than or equal to a power threshold, it is determined that the driving condition is short-distance driving and has a low power requirement.

3. The battery thermal management method according to claim 2, characterized in that: The calculating the target discharge power corresponding to the driving distance based on the historical discharge power set includes: Performing mean processing on each historical discharge power in the historical discharge power set to obtain an average discharge power; The average discharge power and the preset power factor are calculated to obtain the target discharge power.

4. The battery thermal management method according to claim 1, characterized in that: The driving information includes the vehicle speed, current location, destination, health status of the battery, and current power level of the battery; Determining a power consumption range of the battery based on the driving information includes: Calculating the travel distance of the vehicle according to the current position and the destination; Calculating the driving time of the vehicle according to the vehicle speed and the driving distance; Calculating a target power level of the battery when the vehicle reaches the destination based on the driving time, the current power level, and the battery health status; The power consumption range is determined according to the current power and the target power.

5. The battery thermal management method according to claim 1, characterized in that: The determining the thermal management threshold of the battery based on the driving condition and the power consumption range includes: If the driving condition is short-distance driving and the discharge power requirement is low, determining a target discharge power corresponding to the discharge power requirement; Searching for a target battery temperature corresponding to the target discharge power and the power consumption range from a preset power table; the preset power table is used to describe the relationship between the discharge power, power range and battery temperature of the battery; The thermal management threshold is calculated based on the target battery temperature and a preset amplitude threshold.

6. The battery thermal management method according to any one of claims 1 to 5, characterized in that: The thermal management threshold includes a heating start threshold; if the current temperature of the battery meets the judgment condition corresponding to the thermal management threshold, performing thermal management control on the battery corresponding to the thermal management threshold, including: If the current temperature is less than the heating start threshold, a heating operation is performed on the battery.

7. The battery thermal management method according to any one of claims 1 to 5, characterized in that: Before obtaining the driving information of the vehicle, the method further includes: performing a heating operation on the battery; The thermal management threshold includes a heating off threshold, and if the current temperature of the battery meets a judgment condition corresponding to the thermal management threshold, thermal management control corresponding to the thermal management threshold is performed on the battery, including: Acquiring a target temperature of the battery after heating; If the target temperature is greater than or equal to the heating shutdown threshold, the heating operation of the battery is stopped.

8. A battery thermal management device, characterized in that: include: A first acquisition unit, used to acquire driving information of a vehicle; A first operating condition determination unit, configured to determine a driving condition of the vehicle based on the driving information; The driving condition is used to describe the length of the driving distance of the vehicle and the discharge power requirement of the battery of the vehicle; A first range determination unit, configured to determine a power consumption range of the battery based on the driving information; a threshold determination unit, configured to determine a thermal management threshold of the battery based on the driving condition and the power consumption range; The control unit is configured to perform thermal management control on the battery corresponding to the thermal management threshold if the current temperature of the battery meets a judgment condition corresponding to the thermal management threshold.

9. A vehicle-mounted terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the battery thermal management method according to any one of claims 1 to 7 is implemented.

10. A vehicle, characterized in that: Comprising the vehicle-mounted terminal as claimed in claim 9.

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