Power battery heat preservation control method and device, and storage medium

Abstract

This application provides a method, device, and storage medium for power battery thermal insulation control, relating to the field of new energy vehicles. The method acquires the state information of the electric vehicle to determine whether to perform a correction operation on the current thermal insulation target temperature. If a correction operation is determined, the method acquires the power information of the electric vehicle, including engine start information or torque limiting strategy activation information. Based on the power information, the current thermal insulation target temperature is corrected to obtain a new thermal insulation target temperature. This new thermal insulation target temperature is used to determine whether to perform a plug-in thermal insulation operation during the next plug-in charging cycle. This achieves adaptive adjustment of the thermal insulation target temperature, thereby meeting the different temperature requirements of battery cells in different environments, avoiding unnecessary energy consumption, and reducing user operating costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicles, and in particular to a power battery heat preservation control method, device and storage medium. BACKGROUND

[0002] With the development of society and the progress of science and technology, new energy products such as electric vehicles meet the needs of society for energy saving and environmental protection. However, electric vehicles also have some defects due to their own characteristics. For example, the performance of electric vehicles in extreme environments is still not as good as that of traditional cars. An important reason for this gap is that the core energy storage component of new energy products, the power battery, is greatly affected by environmental factors, especially the ambient temperature.

[0003] Therefore, it is generally necessary to heat the battery of an electric vehicle through a charging pile. The control logic for heating the battery of an electric vehicle in the prior art generally first determines whether the battery is fully charged, takes full battery as a condition for activating the battery heat preservation strategy, and then sets two temperature preset values for comparison with the battery cell temperature, which are used as judgment conditions for activating and closing the battery heat preservation, respectively. In order to ensure the driving needs of most users, manufacturers generally maintain the battery cell temperature at a high level, which cannot meet the different needs of different environments for battery cell temperature, resulting in high energy consumption for some users' vehicles, thereby increasing the users' use cost. SUMMARY

[0004] The present application provides a power battery heat preservation control method, device and storage medium to solve the problem that the prior art cannot meet the different needs of different environments for battery cell temperature, resulting in high energy consumption for some users' vehicles, thereby increasing the users' use cost.

[0005] In a first aspect, the present application provides a power battery heat preservation control method, comprising:

[0006] After determining that the current battery capacity is higher than the first preset capacity and the battery plug is pulled out, obtaining the state information of the electric vehicle, the state information including at least one of the time from the activation of the driving system to the pulling out of the plug, the updated battery cell temperature or the remaining battery capacity;

[0007] According to the state information of the electric vehicle, it is determined whether to perform a correction operation on the current heat preservation target temperature. If it is determined to perform a correction operation, the power information of the electric vehicle is obtained, including engine start information and / or torque limiting strategy activation information. The current heat preservation target temperature is the target temperature reached by the battery after the battery plug heat preservation mode is activated.

[0008] The current holding target temperature is corrected according to the power information, and a new holding target temperature is obtained, which is used to determine whether to perform the gun holding operation when the gun is inserted for charging next time.

[0009] In a possible design, the determining whether to perform the correction operation on the current holding target temperature according to the state information of the electric vehicle includes: when the state information of the electric vehicle satisfies at least one of the following conditions, it is determined that the correction operation is performed on the current holding target temperature: the battery gun holding mode is not activated during the last battery gun charging process; a temperature deviation value between the battery cell temperature when the gun is last pulled and the updated battery cell temperature is less than a first preset difference value; the updated battery cell temperature is less than a first temperature preset value; and the remaining battery power is greater than a second preset power, where the first preset power is greater than the second preset power.

[0010] In a possible design, the correcting the current holding target temperature according to the power information to obtain a new holding target temperature includes: when the engine start information indicates that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is activated, it is determined whether to correct the current holding target temperature upward to obtain a new holding target temperature; and when the engine start information does not indicate that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is not activated, it is determined whether to correct the current holding target temperature downward to obtain a new holding target temperature.

[0011] In a possible design, the determining whether to correct the current holding target temperature upward to obtain a new holding target temperature includes: when at least one of the following conditions is met, it is determined that the current holding target temperature is corrected upward: the remaining battery power is greater than a second preset power; the battery cell temperature when the gun is last pulled is greater than or equal to the current holding target temperature; the battery discharge power is less than the maximum power required by the user; and after it is determined that the current holding target temperature is corrected upward, a target working temperature required by the battery is obtained through a battery discharge characteristic curve diagram, and the correction coefficient is obtained according to the target working temperature, where the correction coefficient is greater than 1; and the current holding target temperature is corrected according to the correction coefficient to obtain a new holding target temperature.

[0012] In a possible design, the determining whether to correct the current temperature-maintaining target temperature downward to obtain a new temperature-maintaining target temperature comprises: determining to correct the current temperature-maintaining target temperature downward when at least one of the following conditions is met: the maximum discharging power of the battery is greater than a preset multiple of the maximum power required by the user; the battery cell temperature when the battery plug is pulled out last time is greater than the ambient temperature; after the determination of the correction, obtaining a target operating temperature required by the battery through a battery discharging characteristic curve, and obtaining the correction coefficient according to the target operating temperature, wherein the correction coefficient is less than 1; and correcting the current temperature-maintaining target temperature according to the correction coefficient to obtain a new temperature-maintaining target temperature.

[0013] In a possible design, the correcting the current temperature-maintaining target temperature according to the correction coefficient to obtain a new temperature-maintaining target temperature comprises: obtaining a difference between the correction coefficient and 1 to obtain a correction difference; obtaining a temperature correction value according to the correction difference and the current temperature-maintaining target temperature; and obtaining the new temperature-maintaining target temperature according to the current temperature-maintaining target temperature and the temperature correction value.

[0014] In a possible design, before the obtaining the state information of the electric vehicle, the method further comprises: obtaining a temperature difference between the battery cell temperature and the current temperature-maintaining target temperature; and determining to perform the plug-in temperature-maintaining operation when the temperature difference is less than a first threshold value, and exiting the plug-in temperature-maintaining operation when a new temperature difference is greater than a second threshold value, wherein the first threshold value is a negative value, and the second threshold value is a positive value.

[0015] In a second aspect, the present application provides a power battery temperature-maintaining control device, comprising:

[0016] The detection module is configured to obtain state information of the electric vehicle when it is determined that the current battery power is higher than a first preset power and the battery plug is pulled out, wherein the state information comprises at least one of a time from activation of the driving system to pulling out of the battery plug, an updated battery cell temperature, or a remaining battery power.

[0017] The obtaining module is configured to determine whether to perform a correction operation on a current temperature-maintaining target temperature according to the state information of the electric vehicle, and obtain power information of the electric vehicle if it is determined to perform the correction operation, wherein the power information comprises engine start information and / or limit-torque strategy activation information; and the current temperature-maintaining target temperature is a target temperature reached by the battery after the battery plug temperature-maintaining mode is activated.

[0018] The processing module is configured to correct the current temperature-maintaining target temperature according to the power information to obtain a new temperature-maintaining target temperature, and the new temperature-maintaining target temperature is used to determine whether to perform a plug-in temperature-maintaining operation when the battery plug is plugged in for charging next time.

[0019] In a third aspect, the present application provides an electronic device, comprising: a processor, and a memory connected with the processor in communication;

[0020] The memory stores computer-executable instructions.

[0021] The processor executes the computer-executable instructions stored in the memory to implement the power battery heat preservation control method.

[0022] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor to implement the power battery heat preservation control method.

[0023] The present application provides a power battery heat preservation control method, device and storage medium. When it is determined that the current battery power is higher than a first preset power and the battery plug-in gun is pulled out, whether to perform a correction operation on the current heat preservation target temperature is determined according to the obtained state information of the electric vehicle. If it is determined to perform the correction operation, the power information of the electric vehicle is obtained, and the power information includes engine start information or limit torque strategy activation information. The current heat preservation target temperature is the target temperature of the battery after the battery plug-in gun heat preservation mode is activated. The current heat preservation target temperature is corrected according to the power information to obtain a new heat preservation target temperature. The new heat preservation target temperature is used to determine whether to perform the plug-in gun heat preservation operation when charging next time. The adaptive adjustment of the heat preservation target temperature is realized, so that the different requirements of the battery cell temperature can be met for different environments, unnecessary energy consumption is avoided, and the use cost of the user is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 Flowchart of the power battery heat preservation control method provided by the embodiment of the present application Figure One ;

[0026] Figure 2 Flowchart of the power battery heat preservation control method provided by the embodiment of the present application Figure Two ;

[0027] Figure 3 Structure diagram of the power battery heat preservation control device provided by the embodiment of the present application

[0028] Figure 4 The structural schematic diagram of the electronic device provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] The exemplary embodiments will be described in detail herein below with reference to the drawings. In the following description, the same drawings refer to the same or similar elements unless otherwise described. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as detailed in the appended claims, but not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the scope of protection of the present application.

[0030] The terms "first", "second", "third", "fourth" and the like in the description, claims, and drawings of the present application are used for distinguishing between similar objects, and do not necessarily have to describe a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed as interchangeable to facilitate the description of the embodiments of the present application recited herein to be implemented at least one order other than those illustrated or otherwise described herein.

[0031] First, the related concepts or terms involved in the present application are explained:

[0032] Battery plug-in gun: refers to a part of the assembly of the charging pile, the charging pile as an energy supply device for electric vehicles, the performance of the charging pile is related to the service life and charging time of the battery pack, by connecting the battery plug-in gun connected with the charging pile into the socket matched with the electric vehicle, the charging of the storage battery in the electric vehicle can be realized.

[0033] Plug-in hybrid electric vehicle (PHEV): refers to a new energy vehicle between pure electric vehicle and fuel vehicle, which has engine, transmission, drive system, oil circuit and oil tank.

[0034] Battery Electric Vehicles (BEV): unlike traditional internal combustion engine vehicles, pure electric vehicles do not have engine, transmission, etc. Instead, they have batteries, motors and electronic control systems.

[0035] With the continuous development of new energy vehicle technology, new energy vehicles such as electric vehicles can also work normally in different environments. Electric vehicles generally include plug-in hybrid electric vehicles and pure electric vehicles, but the core energy storage components of plug-in hybrid electric vehicles and pure electric vehicles, power batteries, are greatly affected by environmental temperature and need to be inserted into the corresponding socket through the power battery plug connected to the charging pile to keep the battery of the electric vehicle warm and charge.

[0036] The control logic of the prior art for keeping the battery of an electric vehicle warm is generally to set two temperature preset values for comparison with the battery cell temperature, which are used as the judgment conditions for activating and closing the battery warm-keeping, respectively. In order to ensure the driving needs of most users, manufacturers generally adjust the temperature preset value to be relatively high, so as to maintain the battery cell temperature at a relatively high level, and cannot maintain the battery cell temperature at different levels, which cannot meet the different needs for battery cell temperature in different environments, causing high energy consumption of some users' vehicles, thereby increasing the users' use cost. Therefore, a method is needed that can meet the different needs for battery cell temperature in different environments, avoid unnecessary energy consumption of some users' vehicles, and reduce the users' use cost.

[0037] The present application provides a power battery warm-keeping control method, which determines that the current battery power is higher than a first preset power, and after the battery plug is pulled out, judges whether to perform a correction operation on the current warm-keeping target temperature according to the obtained state information of the electric vehicle. If it is determined to perform the correction operation, the power information of the electric vehicle is obtained, including engine start information or limit torque strategy activation information, wherein the current warm-keeping target temperature is the target temperature reached by the battery after the battery plug warm-keeping mode is activated. The current warm-keeping target temperature is corrected according to the power information to obtain a new warm-keeping target temperature, which is used to judge whether to perform the plug warm-keeping operation when charging next time, realizing the adaptive adjustment of the warm-keeping target temperature, so as to meet the different needs for battery cell temperature in different environments, avoid unnecessary energy consumption, and reduce the users' use cost.

[0038] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0039] Example One

[0040] Figure 1 A power battery warm-keeping control method flow provided by an embodiment of the present applicationFigure One .like Figure 1 As shown, the method includes:

[0041] S101. After determining that the current battery power is higher than the first preset power and after the battery plug is removed, the status information of the electric vehicle is obtained. The status information includes at least one of the following: the time since the drive system was activated and the battery cell temperature has been updated; or the remaining battery power.

[0042] Before obtaining the status information of the electric vehicle, it is also necessary to obtain the battery cell temperature and the current heat preservation target temperature of the vehicle, and calculate the difference between the battery cell temperature and the current heat preservation target temperature, i.e., the temperature difference, to determine whether the plug-in heat preservation operation is required.

[0043] Specifically, after the battery is plugged into the vehicle's matching socket through the charging station's battery plug, and the vehicle's battery level reaches the first preset level, such as when the battery is fully charged or reaches 95% or more, the temperature difference is used to determine whether the plug-in heat preservation operation needs to be performed to keep the vehicle's power battery warm and prevent the vehicle's power battery from not working properly in extremely cold environments.

[0044] S102. Based on the status information of the electric vehicle, determine whether to perform a correction operation on the current heat preservation target temperature. If it is determined to perform a correction operation, obtain the power information of the electric vehicle, which includes engine start information and / or torque limiting strategy activation information.

[0045] Among them, after the battery gun is plugged into the vehicle's matching socket for charging, and the vehicle's battery power reaches the first preset power level, the user unplugs the battery gun or performs a gun heat preservation operation. Based on the acquired status information, it is determined whether the current vehicle status meets the preset conditions, and then it is determined whether to perform a correction operation.

[0046] Specifically, after the battery is plugged into the vehicle's matching socket through the charging station's battery gun and the vehicle's battery is fully charged or reaches 95% or more, the vehicle status information, such as the battery cell temperature or whether the remaining battery power meets the preset conditions, is used to further determine whether a correction operation needs to be performed to adjust and correct the current heat preservation target temperature.

[0047] S103. The current heat preservation target temperature is corrected according to the power information to obtain a new heat preservation target temperature. The new heat preservation target temperature is used to determine whether to perform the heat preservation operation during the next charging.

[0048] The power information includes the vehicle's engine start information and / or torque limiting strategy activation information. The engine start information is applicable to indicating the power information of plug-in hybrid electric vehicles, while the torque limiting strategy activation information is applicable to indicating the power information of pure electric vehicles.

[0049] Specifically, when the vehicle status information obtained, such as battery cell temperature or remaining battery power, meets the preset conditions and it is confirmed that the current heat preservation target temperature is to be corrected, the appropriate correction strategy, such as upward correction or downward correction, is confirmed based on the obtained power information. When the preset conditions for upward or downward correction are met, the corresponding correction coefficient is confirmed to obtain the new heat preservation target temperature.

[0050] This application provides a power battery thermal insulation control method. After determining that the current battery charge is higher than a first preset charge and the battery charging gun is plugged in or unplugged, the method determines whether to perform a correction operation on the current thermal insulation target temperature based on the acquired electric vehicle status information. If it is determined to perform a correction operation, the method acquires the electric vehicle's power information and corrects the current thermal insulation target temperature based on the power information to obtain a new thermal insulation target temperature. This achieves adaptive adjustment of the thermal insulation target temperature, thereby meeting the different requirements for battery cell temperature under different environments, avoiding unnecessary energy consumption, and reducing user operating costs.

[0051] The following specific embodiment will be used to describe in detail a power battery heat preservation control method of this application.

[0052] Example Two

[0053] Figure 2 A schematic flowchart of a power battery thermal insulation control method provided in this application embodiment. Figure Two .like Figure 2 As shown, the method includes:

[0054] S201. After determining that the current battery power is higher than the first preset power and after the battery charging gun is plugged in and unplugged, obtain the status information of the electric vehicle.

[0055] Before acquiring the status information of the electric vehicle, the temperature difference between the battery cell temperature and the current target temperature is acquired to determine whether a heat preservation operation needs to be performed. Specifically, if the temperature deviation is less than a first threshold, the heat preservation operation is performed, and if the new temperature deviation is greater than a second threshold, the heat preservation operation is exited. The first threshold is negative, and the second threshold is positive. The vehicle status information includes at least one of the following: the time between the activation of the drive system and the removal of the heat preservation gun, the updated battery cell temperature, or the remaining battery charge.

[0056] Specifically, after the battery is plugged into the vehicle's matching socket through the charging station's battery gun and charged until the vehicle's battery reaches the first preset charge level (i.e., fully charged or above 95%), the system determines whether to perform a battery gun insulation operation by measuring the difference between the battery cell temperature and the current target insulation temperature. If the measured temperature deviation is less than the first threshold, the system will perform the battery gun insulation operation to keep the vehicle's power battery warm and prevent it from malfunctioning in extremely cold environments.

[0057] S202. Based on the status information of the electric vehicle, determine whether to perform a correction operation on the current heat preservation target temperature;

[0058] Among them, by obtaining vehicle status information such as whether the battery cell temperature or the remaining battery power meets the preset conditions, it is further determined whether a correction operation needs to be performed to adjust and correct the current heat preservation target temperature.

[0059] Specifically, when the electric vehicle's status information meets at least one of the following conditions, a correction operation is determined to be performed on the current target temperature for heat preservation: the battery charging gun heat preservation mode was not activated during the last battery charging process; the temperature deviation between the battery cell temperature at the time of the last unplugging and the updated battery cell temperature is less than a first preset difference; the updated battery cell temperature is less than a first preset temperature value; and the remaining battery charge is greater than a second preset charge, wherein the first preset charge is greater than the second preset charge.

[0060] Specifically, when the battery charging gun is inserted into the vehicle's socket for charging, and the vehicle's battery level reaches a first preset level, if the user unplugs the battery charging gun or performs a charging gun insulation operation, and it is detected that the charging gun insulation mode was not activated during the previous charging process (i.e., no charging gun insulation operation was performed), or if the temperature deviation between the battery cell temperature at the time of unplugging the gun and the updated battery cell temperature is less than a first preset difference, or if the updated battery cell temperature is less than a first preset temperature value, or if the remaining battery level is greater than a second preset level, then it is determined that an insulation target temperature correction operation will be performed. If the above preset conditions are not met, it is determined that no insulation target temperature correction operation will be performed.

[0061] S203. If it is determined that a correction operation will be performed, the power information of the electric vehicle is obtained, including engine start information and / or torque limiting strategy activation information.

[0062] Among them, when the state information of the electric vehicle meets the preset conditions, after determining to execute the correction operation, the power information of the electric vehicle is obtained. Electric vehicles can be divided into plug-in hybrid electric vehicles and pure electric vehicles. Engine start information is used to indicate plug-in hybrid electric vehicles, and torque limiting strategy activation information is used to indicate pure electric vehicles.

[0063] Specifically, after determining to perform the correction operation, corresponding power information is obtained according to the different types of electric vehicles. The power information obtained for plug-in hybrid electric vehicles is engine start information, which is used to indicate the engine start signal of the current plug-in hybrid electric vehicle. The power information obtained for pure electric vehicles is torque limiting strategy activation information, which is used to indicate the drive torque limiting signal of the current pure electric vehicle.

[0064] S204. When the engine start information indicates that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is activated, determine whether to correct the current heat preservation target temperature upward to obtain a new heat preservation target temperature.

[0065] The current target temperature for heat preservation is adjusted upward when at least one of the following conditions is met: the remaining battery charge is greater than the second preset charge; the battery cell temperature at the time of the last removal of the gun is greater than or equal to the current target temperature for heat preservation; or the battery discharge power is less than the maximum power required by the user.

[0066] Specifically, after determining to perform the correction operation, when the power information obtained by the plug-in hybrid electric vehicle, i.e. the engine start information, indicates that the engine is started, or when the power information obtained by the pure electric vehicle, i.e. the torque limiting strategy activation information, indicates that the torque limiting strategy is activated, it is determined that the current correction strategy is upward correction. After determining that the current correction strategy is upward correction, it is further determined, based on the vehicle status information, whether the aforementioned upward correction preset conditions can be met.

[0067] If the current vehicle status information meets the aforementioned upward correction preset conditions, the target operating temperature required by the battery is obtained through the battery discharge characteristic curve, and a correction coefficient is obtained based on the target operating temperature. At this time, the correction coefficient is greater than 1. If the current vehicle status information does not meet the aforementioned upward correction preset conditions, the correction coefficient is equal to 1. The current heat preservation target temperature is corrected based on the correction coefficient to obtain a new heat preservation target temperature.

[0068] S205. When the engine start information does not indicate engine start, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is not activated, determine whether to adjust the current heat preservation target temperature downward to obtain a new heat preservation target temperature.

[0069] The current target temperature for heat preservation is adjusted downward when at least one of the following conditions is met: the maximum discharge power of the battery is greater than a preset multiple of the user's maximum power requirement; the battery cell temperature when the battery connector was last removed is greater than the ambient temperature.

[0070] Specifically, after determining to perform the correction operation, if the power information obtained by the plug-in hybrid electric vehicle, i.e. the engine start information, does not indicate that the engine is started, or the power information obtained by the pure electric vehicle, i.e. the torque limiting strategy activation information, does not indicate that the torque limiting strategy is activated, the current correction strategy is determined to be downward correction. After determining that the current correction strategy is downward correction, the vehicle status information is further used to determine whether the aforementioned downward correction preset conditions can be met.

[0071] If the current vehicle status information meets the aforementioned downward correction preset conditions, the target operating temperature required by the battery is obtained through the battery discharge characteristic curve, and a correction coefficient is obtained based on the target operating temperature. At this time, the correction coefficient is less than 1. If the current vehicle status information does not meet the aforementioned upward correction preset conditions, the correction coefficient is equal to 1. The current heat preservation target temperature is corrected based on the correction coefficient to obtain a new heat preservation target temperature.

[0072] S206. Correct the current insulation target temperature according to the correction coefficient to obtain a new insulation target temperature;

[0073] Specifically, by obtaining the difference between the correction coefficient and 1, a correction difference is obtained; based on the correction difference and the current insulation target temperature, a temperature correction value is obtained; and based on the current insulation target temperature and the temperature correction value, the new insulation target temperature is obtained.

[0074] Specifically, based on the electric vehicle's power information, the current correction strategy for the electric vehicle is confirmed. Based on the electric vehicle's state information, after satisfying the corresponding upward or downward correction preset conditions, a correction coefficient that works with the upward or downward correction strategy is obtained. Based on the difference between the obtained correction coefficient and 1, a correction difference is obtained. Based on the obtained correction difference and the current heat preservation target temperature, a temperature correction value is obtained. Based on the current heat preservation target temperature and the temperature correction value, a new heat preservation target temperature is obtained. During the next plug-in charging, based on the new heat preservation target temperature, it is determined whether to perform plug-in heat preservation operation, thereby achieving adaptive adjustment of the heat preservation target temperature.

[0075] The new target insulation temperature is obtained using the following formula:

[0076] CellTrg_Temp(n+1)=CellTrg_Temp(n)+|CellTrg_Temp(n)|×[K(n+1)-1];

[0077] Where CellTrgt_Temp(n+1) is the new target insulation temperature, CellTrgt_Temp(n) is the current target insulation temperature, and K is the correction coefficient.

[0078] This application provides a power battery thermal insulation control method. After determining that the current battery charge is higher than a first preset charge and the battery charging gun is disconnected, the method determines whether to perform a correction operation on the current thermal insulation target temperature based on the acquired electric vehicle status information. If it is determined to perform the correction operation, the method acquires the electric vehicle's power information, which includes engine start information or torque limiting strategy activation information. The current thermal insulation target temperature is the target temperature reached by the battery after the battery charging gun thermal insulation mode is activated. The current thermal insulation target temperature is corrected based on the power information to obtain a new thermal insulation target temperature. The new thermal insulation target temperature is used to determine whether to perform the charging gun thermal insulation operation during the next charging session. This achieves adaptive adjustment of the thermal insulation target temperature, thereby meeting the different temperature requirements of the battery cells in different environments, avoiding unnecessary energy consumption, and reducing user operating costs.

[0079] In this embodiment of the invention, electronic devices or main control devices can be divided into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment of the invention is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0080] Figure 3 This is a schematic diagram of the power battery thermal insulation control device provided in an embodiment of this application. Figure 3 As shown, the device 300 includes:

[0081] The detection module 301 is used to obtain the status information of the electric vehicle after determining that the current battery power is higher than a first preset power and after the battery plug is removed. The status information includes at least one of the following: the time since the drive system was activated and the battery cell temperature was updated; or the remaining battery power.

[0082] The acquisition module 302 is used to determine whether to perform a correction operation on the current heat preservation target temperature based on the status information of the electric vehicle. If it is determined to perform a correction operation, the power information of the electric vehicle is acquired. The power information includes engine start information and / or torque limiting strategy activation information. The current heat preservation target temperature is the target temperature reached by the battery after the battery plug-in heat preservation mode is activated.

[0083] The processing module 303 is used to correct the current heat preservation target temperature according to the power information to obtain a new heat preservation target temperature. The new heat preservation target temperature is used to determine whether to perform the heat preservation operation during the next charging.

[0084] Furthermore, the acquisition module 302 is specifically used to determine to perform a correction operation on the current heat preservation target temperature when the state information of the electric vehicle meets at least one of the following conditions: the battery plug heat preservation mode was not activated during the last battery plug charging process; the temperature deviation between the battery cell temperature at the last plug-out and the updated battery cell temperature is less than a first preset difference; the updated battery cell temperature is less than a first preset temperature value; and the remaining battery charge is greater than a second preset charge, wherein the first preset charge is greater than the second preset charge.

[0085] Furthermore, the processing module 303 is specifically used to: when the engine start information indicates that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is activated, determine whether to correct the current heat preservation target temperature upward to obtain a new heat preservation target temperature; when the engine start information does not indicate that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is not activated, determine whether to correct the current heat preservation target temperature downward to obtain a new heat preservation target temperature.

[0086] Furthermore, the processing module 303 is specifically configured to: determine an upward correction to the current heat preservation target temperature when at least one of the following conditions is met: the remaining battery charge is greater than a second preset charge; the battery cell temperature at the time of the last removal of the gun is greater than or equal to the current heat preservation target temperature; the battery discharge power is less than the maximum power required by the user; after determining the upward correction, obtain the target operating temperature required by the battery through the battery discharge characteristic curve, and obtain the correction coefficient based on the target operating temperature, wherein the correction coefficient is greater than 1; correct the current heat preservation target temperature based on the correction coefficient to obtain a new heat preservation target temperature.

[0087] Furthermore, the processing module 303 is specifically configured to: determine to downwardly correct the current heat preservation target temperature when at least one of the following conditions is met: the maximum discharge power of the battery is greater than a preset multiple of the user's maximum required power; the battery cell temperature when the battery plug was last removed is greater than the ambient temperature; after determining the downward correction, obtain the target operating temperature required by the battery through the battery discharge characteristic curve, and obtain the correction coefficient based on the target operating temperature, wherein the correction coefficient is less than 1; correct the current heat preservation target temperature based on the correction coefficient to obtain a new heat preservation target temperature.

[0088] Furthermore, the processing module 303 is specifically used for: obtaining the difference between the correction coefficient and 1 to obtain a correction difference; obtaining a temperature correction value based on the correction difference and the current insulation target temperature; and obtaining the new insulation target temperature based on the current insulation target temperature and the temperature correction value.

[0089] Furthermore, the detection module 301 is specifically used to: obtain the temperature difference between the battery cell temperature and the current heat preservation target temperature; if the temperature deviation value is less than a first threshold, then determine to perform the insertion gun heat preservation operation, and exit the insertion gun heat preservation operation when the new temperature deviation is greater than a second threshold, wherein the first threshold is a negative value and the second threshold is a positive value.

[0090] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 4 As shown, the electronic device 400 includes at least one processor 401 and a memory 402. The electronic device 400 also includes a communication component 403. The processor 401, memory 402, and communication component 403 are connected via a bus 404.

[0091] In the specific implementation process, at least one processor 401 executes the computer execution instructions stored in the memory 402, causing at least one processor 401 to execute the power battery heat preservation control method executed on the electronic device side as described above.

[0092] The specific implementation process of processor 401 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0093] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0094] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage.

[0095] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0096] The above description of the functions implemented by electronic devices and main control devices has introduced the solutions provided by the embodiments of the present invention. It is understood that, in order to implement the above functions, the electronic device or main control device includes hardware structures and / or software modules corresponding to the execution of each function. By combining the units and algorithm steps of the various examples described in the embodiments of the present invention, the embodiments of the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present invention.

[0097] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-mentioned power battery heat preservation control method.

[0098] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0099] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in an electronic device or a host device.

[0100] This application also provides a computer program product, comprising: a computer program stored in a readable storage medium, wherein at least one processor of an electronic device can read the computer program from the readable storage medium, and the at least one processor executes the computer program to cause the electronic device to perform the scheme provided in any of the above embodiments.

[0101] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the thermal insulation of a power battery, applied to electric vehicles, characterized in that, The method includes: After determining that the current battery charge is higher than the first preset charge and after the battery charging gun is plugged in and unplugged, the status information of the electric vehicle is obtained. The status information includes at least one of the following: the time since the driving system was activated and the charging gun was unplugged, the updated battery cell temperature, or the remaining battery charge. Based on the status information of the electric vehicle, it is determined whether to perform a correction operation on the current heat preservation target temperature. If it is determined to perform a correction operation, the power information of the electric vehicle is obtained. The power information includes engine start information and / or torque limiting strategy activation information. The current heat preservation target temperature is the target temperature reached by the battery after the battery plug-in heat preservation mode is activated. The current heat preservation target temperature is corrected based on the power information to obtain a new heat preservation target temperature. The new heat preservation target temperature is used to determine whether to perform the heat preservation operation during the next charging.

2. The method according to claim 1, characterized in that, The step of determining whether to perform a correction operation on the current target insulation temperature based on the status information of the electric vehicle includes: When the status information of the electric vehicle meets at least one of the following conditions, a correction operation is determined to be performed on the current target insulation temperature: The battery charging gun insulation mode was not activated during the last battery charging process. The temperature deviation between the battery cell temperature at the time of the last gun removal and the updated battery cell temperature is less than a first preset difference. The updated battery cell temperature is lower than the first preset temperature value; The remaining battery power is greater than the second preset power, wherein the first preset power is greater than the second preset power.

3. The method according to claim 1, characterized in that, The step of correcting the current target insulation temperature based on the power information to obtain a new target insulation temperature includes: When the engine start information indicates that the engine is started, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is activated, determine whether to correct the current heat preservation target temperature upward to obtain a new heat preservation target temperature; When the engine start information does not indicate engine start, and / or the torque limiting strategy activation information indicates that the torque limiting strategy is not activated, it is determined whether to adjust the current heat preservation target temperature downward to obtain a new heat preservation target temperature.

4. The method according to claim 3, characterized in that, The determination of whether to adjust the current insulation target temperature upwards to obtain a new insulation target temperature includes: The current target insulation temperature is to be corrected upward when at least one of the following conditions is met: The remaining battery power is greater than the second preset power level; The battery cell temperature at the last time the gun was removed was greater than or equal to the current target temperature for heat preservation. The battery discharge power is less than the maximum power required by the user. After determining the upward correction, the target operating temperature required by the battery is obtained through the battery discharge characteristic curve, and a correction coefficient is obtained based on the target operating temperature, wherein the correction coefficient is greater than 1; The current insulation target temperature is corrected according to the correction coefficient to obtain a new insulation target temperature.

5. The method according to claim 3, characterized in that, The determination of whether to adjust the current insulation target temperature downwards to obtain a new insulation target temperature includes: The current target insulation temperature is to be corrected downward when at least one of the following conditions is met: The maximum discharge power of the battery is greater than a preset multiple of the user's maximum power requirement. The battery cell temperature was higher than the ambient temperature when the battery connector was last removed. After determining the downward correction, the target operating temperature required by the battery is obtained through the battery discharge characteristic curve, and a correction coefficient is obtained based on the target operating temperature, wherein the correction coefficient is less than 1. The current insulation target temperature is corrected according to the correction coefficient to obtain a new insulation target temperature.

6. The method according to claim 5, characterized in that, The step of correcting the current insulation target temperature according to the correction coefficient to obtain a new insulation target temperature includes: Obtain the difference between the correction coefficient and 1 to get the correction difference; Based on the correction difference and the current insulation target temperature, obtain the temperature correction value; The new insulation target temperature is obtained based on the current insulation target temperature and the temperature correction value.

7. The method according to any one of claims 1 to 6, characterized in that, Before acquiring the status information of the electric vehicle, the method further includes: Obtain the temperature difference between the battery cell temperature and the current target insulation temperature; If the temperature deviation is less than the first threshold, the insertion gun heat preservation operation is determined to be performed, and the insertion gun heat preservation operation is exited when the new temperature deviation is greater than the second threshold. The first threshold is a negative value and the second threshold is a positive value.

8. A power battery heat preservation control device, characterized in that, include: The detection module is used to obtain the status information of the electric vehicle after determining that the current battery power is higher than a first preset power and after the battery plug is removed. The status information includes at least one of the following: the time since the drive system was activated and the battery cell temperature has been updated; or the remaining battery power. The acquisition module is used to determine whether to perform a correction operation on the current heat preservation target temperature based on the status information of the electric vehicle. If it is determined to perform a correction operation, the module acquires the power information of the electric vehicle, which includes engine start information and / or torque limiting strategy activation information. The current heat preservation target temperature is the target temperature reached by the battery after the battery plug-in heat preservation mode is activated. The processing module is used to correct the current heat preservation target temperature based on the power information to obtain a new heat preservation target temperature. The new heat preservation target temperature is used to determine whether to perform the heat preservation operation during the next charging.

9. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 7.

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