Power battery driving and heating method and device, electronic equipment and storage medium

Abstract

This application provides a method, apparatus, electronic device, and storage medium for heating a power battery while driving. The method includes: acquiring the current state of charge (SOC) and current minimum temperature of the power battery; determining whether the current SOC is within a preset SOC range; and heating the power battery when the current minimum temperature is less than a first temperature threshold. This application can heat the power battery of a pure electric vehicle during driving, overcoming the technical problem of poor battery capacity retention at low temperatures. Furthermore, this application enables the battery to release more electricity than is consumed by heating, thereby achieving optimal driving range performance.

Description

Technical Field

[0001] This application relates to the field of electric vehicles, and more specifically, to a method, apparatus, electronic device, and storage medium for heating a power battery while driving. Background Technology

[0002] The battery capacity and discharge rate of a power battery are affected by its temperature. Generally, when the battery temperature is low, the battery capacity and discharge rate will also be low. As a result, when the battery temperature is low, the battery capacity and discharge rate will be low, which means that the power battery cannot provide enough power to the electric vehicle, and the electric vehicle's power performance cannot meet the power requirements.

[0003] To address the issue that the power performance of the aforementioned power battery cannot meet the power demand at low temperatures, the main solution in existing technologies is to heat the power battery, thereby increasing its temperature, increasing its capacity and discharge rate, and ultimately improving its power output.

[0004] While the above solutions can increase the amount of electricity released by the power battery by heating it to provide power output, heating the power battery consumes energy. In some scenarios, the energy consumed by heating the power battery is greater than the amount of electricity released by the power battery, which is a negative benefit to the power battery's range performance, i.e., it reduces the power battery's range performance. Summary of the Invention

[0005] The purpose of this application is to provide a method, apparatus, electronic device, and storage medium for heating a power battery during vehicle operation, thereby overcoming the technical problem of poor battery capacity retention at low temperatures. Furthermore, this application enables the battery to release more electricity than is consumed by heating, thus achieving optimal driving range performance.

[0006] In a first aspect, the present invention provides a method for heating a power battery while driving, the method comprising:

[0007] Obtain the current state of charge (SOC) and the current minimum temperature of the power battery;

[0008] Determine whether the current state of charge (SOC) is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state;

[0009] When the current state of charge (SOC) is within the preset SOC range, it is determined whether the current minimum temperature of the power battery is less than a first temperature threshold.

[0010] When the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. During the heating process, if the current state of charge (SOC) is not within the preset SOC range, or the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery stops heating.

[0011] The method of this application obtains the current state of charge (SOC) and the current minimum temperature of the power battery, and then determines whether the current SOC is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state. Furthermore, when the current SOC is within the preset SOC range, it determines whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature is less than the first temperature threshold, the power battery is heated, thereby overcoming the technical problem of poor battery capacity retention at low temperatures by increasing the battery temperature. During the heating process, if the current SOC is not within the preset SOC range, or the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the heating process is stopped.

[0012] Meanwhile, compared with the prior art, this application can heat the power battery only when the current SOC is in the range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the battery releases more electricity than it consumes due to heating, thereby obtaining the best range performance.

[0013] In an optional implementation, the left endpoint of the preset SOC interval is the maximum value of the state of charge (SOC), and the right endpoint of the preset SOC interval is the minimum value of the state of charge (SOC). Within the preset SOC interval, the state of charge (SOC) of the power battery is linearly related to the first temperature threshold. The minimum value of the state of charge (SOC) corresponds to the maximum value of the first temperature threshold, and the maximum value of the state of charge (SOC) corresponds to the minimum value of the first temperature threshold.

[0014] Furthermore, before determining whether the current minimum temperature of the power battery is less than a first temperature threshold, the method further includes:

[0015] The first temperature threshold is calculated based on the following formula:

[0016] Tempset=Temp_H i gh-(SOC-SOC_Min)×(Temp_H i gh-Temp_Low) / (SOC_Max-SOC_Min);

[0017] Wherein, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum SOC, SOC represents the current SOC of the power battery, SOC_Min represents the minimum SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum SOC, and SOC_Max represents the maximum SOC.

[0018] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, avoiding the situation where the power battery will heat up too early under some operating conditions, causing the battery temperature to drop too much at the end of the trip, or heat up too late, causing the temperature to fail to reach the target at the end of the trip.

[0019] In an optional implementation, before heating the power battery after the current minimum temperature of the power battery is lower than the first temperature threshold, the method further includes:

[0020] The vehicle speed is obtained and the user's driving intention is identified based on the vehicle speed.

[0021] When the user has no intention of driving, the heating of the power battery will not be triggered.

[0022] This optional implementation avoids ineffective heating when the user has no intention to drive after judging the user's driving intention.

[0023] In an optional implementation, the method further includes:

[0024] If the vehicle speed is less than 1.5 km / h for 120 seconds during the heating process, the heating of the power battery will be stopped.

[0025] In this optional embodiment, heating of the power battery can be stopped for 120 seconds at a vehicle speed of <1.5km / h, thereby avoiding ineffective heating of the power battery.

[0026] In an optional implementation, acquiring the vehicle speed and identifying whether the user intends to drive based on the vehicle speed includes:

[0027] If the vehicle speed is greater than 5 km / h for 30 seconds, it is determined that the user has the intention to drive; otherwise, it is determined that the user does not have the intention to drive.

[0028] This optional implementation can determine that the user has the intention to drive if the vehicle speed is >5km / h for 30 seconds; otherwise, it can determine that the user does not have the intention to drive.

[0029] Secondly, the present invention provides a power battery vehicle heating device, the device comprising:

[0030] The first acquisition module is used to acquire the current state of charge (SOC) of the power battery and the current minimum temperature of the power battery.

[0031] The first judgment module is used to determine whether the current state of charge (SOC) is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state.

[0032] The second judgment module is used to determine whether the current minimum temperature of the power battery is less than a first temperature threshold when the current state of charge (SOC) is within the preset SOC range.

[0033] A heating control module is used to heat the power battery when the current minimum temperature of the power battery is less than the first temperature threshold. During the heating process, the power battery stops heating when the current state of charge (SOC) is not within the preset SOC range, or when the current minimum temperature of the power battery is greater than or equal to the second temperature threshold.

[0034] The device of this application acquires the current state of charge (SOC) and the current minimum temperature of the power battery, and then determines whether the current SOC is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state. Furthermore, when the current SOC is within the preset SOC range, it determines whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature is less than the first temperature threshold, the power battery is heated, thereby overcoming the technical problem of poor battery capacity retention at low temperatures by increasing the battery temperature. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the heating process is stopped.

[0035] Meanwhile, compared with the prior art, this application can heat the power battery only when the current SOC is in the range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the battery releases more electricity than it consumes due to heating, thereby obtaining the best range performance.

[0036] In an optional implementation, the left endpoint of the preset SOC interval is the maximum value of the state of charge (SOC), and the right endpoint of the preset SOC interval is the minimum value of the state of charge (SOC). Within the preset SOC interval, the state of charge (SOC) of the power battery is linearly related to the first temperature threshold. The minimum value of the state of charge (SOC) corresponds to the maximum value of the first temperature threshold, and the maximum value of the state of charge (SOC) corresponds to the minimum value of the first temperature threshold.

[0037] The device also includes:

[0038] The calculation module is used to calculate the first temperature threshold based on a formula before determining whether the current minimum temperature of the power battery is less than the first temperature threshold. The formula is:

[0039] Tempset=Temp_H i gh-(SOC-SOC_Min)×(Temp_H i gh-Temp_Low) / (SOC_Max-SOC_Min);

[0040] Wherein, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum SOC, SOC represents the current SOC of the power battery, SOC_Min represents the minimum SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum SOC, and SOC_Max represents the maximum SOC.

[0041] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, avoiding the situation where the power battery will heat up too early under some operating conditions, causing the battery temperature to drop too much at the end of the trip, or heat up too late, causing the temperature to fail to reach the target at the end of the trip.

[0042] In an optional embodiment, the apparatus further includes:

[0043] The second acquisition module is used to acquire the vehicle speed and identify whether the user has a driving intention based on the vehicle speed after the current minimum temperature of the power battery is less than the first temperature threshold and before the power battery is heated.

[0044] Furthermore, the heating control module is also configured to prevent the heating of the power battery from being triggered when the user does not intend to drive.

[0045] This optional implementation avoids ineffective heating when the user has no intention to drive after judging the user's driving intention.

[0046] Thirdly, the present invention provides an electronic device, comprising:

[0047] Processor; and

[0048] The memory is configured to store machine-readable instructions that, when executed by the processor, perform the power battery vehicle heating method as described in any of the foregoing embodiments.

[0049] The electronic device of this application, by executing a power battery heating method for vehicle operation, can obtain the current state of charge (SOC) and the current minimum temperature of the power battery, and then determine whether the current SOC is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state. Furthermore, when the current SOC is within the preset SOC range, it can determine whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature is less than the first temperature threshold, the power battery is heated, thereby overcoming the technical problem of poor battery capacity retention at low temperatures by increasing the battery temperature. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the heating process is terminated.

[0050] Meanwhile, compared with the prior art, this application can heat the power battery only when the current SOC is in the range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the battery releases more electricity than it consumes due to heating, thereby obtaining the best range performance.

[0051] Fourthly, the present invention provides a storage medium storing a computer program, the computer program being executed by a processor as described in any of the foregoing embodiments of the power battery vehicle heating method.

[0052] The storage medium of this application, by executing a power battery vehicle heating method, can obtain the current state of charge (SOC) and the current minimum temperature of the power battery, and then determine whether the current SOC is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state. Furthermore, when the current SOC is within the preset SOC range, it can determine whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature is less than the first temperature threshold, the power battery is heated, thereby overcoming the technical problem of poor battery capacity retention at low temperatures by increasing the battery temperature. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the power battery heating is stopped.

[0053] Meanwhile, compared with the prior art, this application can heat the power battery only when the current SOC is in the range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the battery releases more electricity than it consumes due to heating, thereby obtaining the best range performance. Attached Figure Description

[0054] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic flowchart of a power battery vehicle heating method disclosed in an embodiment of this application;

[0056] Figure 2 This is a schematic diagram illustrating the relationship between SOC and temperature as disclosed in an embodiment of this application;

[0057] Figure 3 This is a schematic diagram of parking time distribution disclosed in an embodiment of this application;

[0058] Figure 4 This is a schematic diagram of the structure of a power battery vehicle heating device disclosed in an embodiment of this application;

[0059] Figure 5 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application. Detailed Implementation

[0060] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0061] Example 1

[0062] Please see Figure 1 , Figure 1 This is a schematic flowchart of a power battery vehicle heating method disclosed in an embodiment of this application, as shown below. Figure 1 As shown, the method in this application embodiment includes the following steps:

[0063] 101. Obtain the current state of charge (SOC) and current minimum temperature of the power battery;

[0064] 102. Determine whether the current state of charge (SOC) is within the preset SOC range, where the preset SOC range indicates that the power battery is in a low charge state.

[0065] 103. When the current state of charge (SOC) is within the preset SOC range, determine whether the current minimum temperature of the power battery is less than the first temperature threshold.

[0066] 104. When the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. During the heating process, if the current state of charge (SOC) is not within the preset SOC range, or if the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery stops heating. It should be noted that the current state of charge (SOC) not being within the preset SOC range can mean that the current state of charge (SOC) is less than the minimum value of the state of charge (SOC).

[0067] The method in this application embodiment obtains the current state of charge (SOC) and the current minimum temperature of the power battery, and then determines whether the current SOC is within a preset SOC range. The preset SOC range indicates that the power battery is in a low charge state. When the current SOC is within the preset SOC range, it determines whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. This increases the battery temperature and overcomes the technical problem of poor battery capacity retention at low temperatures. During the heating process, if the current SOC is less than the minimum SOC value, or the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the power battery stops heating.

[0068] Meanwhile, compared with the prior art, the embodiments of this application can heat the power battery only when the current SOC is in the numerical range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the extra power released by the battery is greater than the power consumed by heating, thereby obtaining the best range performance.

[0069] This application can ensure that after entering the heating preset range, the battery can be heated to the target temperature, or can ensure that the amount of electricity released through heating is greater than the amount of electricity consumed due to heating.

[0070] In this embodiment of the application, for step 101, the current state of charge (SOC) and the current minimum temperature of the power battery can be obtained through the battery management system (BMS). The current SOC of the power battery can be calculated based on the real-time voltage and real-time current of the power battery. On the other hand, the current minimum temperature of the power battery can be obtained based on data from multiple temperature sensors. For example, assuming that a temperature sensor is installed at three locations on the power battery, and each temperature sensor outputs a temperature detection value, the minimum detection value among these three temperature detection values ​​is taken as the current minimum temperature of the power battery.

[0071] In this embodiment of the application, regarding step 102, it should be noted that the definition of the power battery being in a low charge state can be determined based on factors such as the model of the electric vehicle and the model of the power battery. For the definition of the power battery being in a low charge state under each model, please refer to the technical standards in the prior art. This embodiment of the application does not limit this.

[0072] In this application embodiment, as an optional implementation method, please refer to... Figure 2 , Figure 2 This is a schematic diagram illustrating the relationship between SOC and temperature as disclosed in an embodiment of this application. Figure 2 As shown, the left endpoint of the preset SOC interval is the maximum SOC value, and the right endpoint is the minimum SOC value. Within the preset SOC interval, the SOC of the power battery has a linear relationship with the first temperature threshold; the minimum SOC value corresponds to the maximum value of the first temperature threshold, and the maximum SOC value corresponds to the minimum value of the first temperature threshold. Furthermore, as... Figure 2As shown, based on the relationship between SOC and temperature, a first temperature threshold corresponding to SOC can be determined. Thus, under different SOC conditions, an appropriate first temperature threshold can be used to determine whether the temperature conditions required for heating the power battery are met, thereby avoiding premature or delayed heating. For example, under the condition that the current state of charge (SOC) is 27%, 5 degrees Celsius can be used as the first temperature threshold instead of 10 degrees Celsius. In this way, premature heating can be avoided without significantly reducing the performance of the power battery at 10 degrees Celsius.

[0073] Accordingly, before determining whether the current minimum temperature of the power battery is less than the first temperature threshold, the method in this embodiment further includes the following steps:

[0074] The first temperature threshold is calculated based on the following formula:

[0075] Tempset=Temp_H i gh-(SOC-SOC_M in)×(Temp_H i gh-Temp_Low) / (SOC_Max-SOC_M in);

[0076] Where Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum state of charge (SOC), SOC represents the current state of charge (SOC) of the power battery, SOC_Min represents the minimum state of charge (SOC), Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum state of charge (SOC), and SOC_Max represents the maximum state of charge (SOC).

[0077] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, avoiding the situation where the power battery will heat up too early under some operating conditions, causing the battery temperature to drop too much at the end of the trip, or heat up too late, causing the temperature to fail to reach the target at the end of the trip.

[0078] In this embodiment of the application, as an optional implementation, before heating the power battery after the current minimum temperature of the power battery is lower than a first temperature threshold, the method of this embodiment of the application further includes the following steps:

[0079] Get the vehicle speed and identify whether the user has driving intentions based on the vehicle speed;

[0080] When the user does not intend to drive, the heating of the power battery will not be triggered.

[0081] This optional implementation avoids ineffective heating when the user has no intention to drive after judging the user's driving intention.

[0082] In the above-mentioned optional implementation methods, vehicle speed refers to the speed of the vehicle where the power battery is located, which can be read from the vehicle's central control panel.

[0083] In this application embodiment, as an optional implementation, the method of this application embodiment further includes the following:

[0084] If the vehicle speed is less than 1.5 km / h for 120 seconds during the heating process, the heating of the power battery will be discontinued.

[0085] In this optional implementation, the heating of the power battery can be stopped for 120 seconds at a vehicle speed of <1.5km / h, thereby avoiding ineffective heating of the power battery.

[0086] In this embodiment of the application, as an optional implementation, the step of acquiring the vehicle speed and identifying whether the user has a driving intention based on the vehicle speed includes the following sub-steps:

[0087] If the vehicle speed is greater than 5 km / h for 30 seconds, it is determined that the user has the intention to drive; otherwise, it is determined that the user does not have the intention to drive.

[0088] This optional implementation can determine that the user has the intention to drive if the vehicle speed is greater than 5 km / h for 30 seconds, otherwise it can determine that the user does not have the intention to drive.

[0089] Regarding the above optional implementation methods, the duration of vehicle speed can be based on... Figure 3 It is confirmed that, among them, Figure 3 The duration of parking when users intended to park was statistically analyzed, thus forming the distribution of the interval between when users parked and continued driving, such as... Figure 3 As shown, under normal circumstances, if a user intends to park, the parking duration is 63.8 seconds. Therefore, 63.8 seconds can be used as the duration judgment value. That is, if the parking duration exceeds 63.8 seconds, it means the user does not intend to drive; otherwise, it means the user intends to drive. Furthermore, to respond to power output more quickly, at higher vehicle speeds, 63.8 seconds is modified to 30 seconds, allowing the heating condition to be reached more quickly at higher speeds, thus resulting in a faster power response from the battery. On the other hand, at lower vehicle speeds, 63.8 seconds is modified to 120 seconds, making it more difficult to reach the heating deactivation condition, preventing premature deactivation of heating at low speeds. It should be noted that... Figure 3 This is a schematic diagram of parking time distribution disclosed in an embodiment of this application.

[0090] In this embodiment of the application, as an example, taking the calibration results of a certain battery as an example, assuming SOC_Max = 28%, SOC_Min = 9%, Temp_high = 12℃, Temp_Low = -6℃, SOC_end = 4%, Temp_req = 13℃, then when the current state of charge (SOC) of the power battery is 25% and the current minimum temperature of the power battery is -4 degrees Celsius, it is within the preset SOC range of 28%-9%. At this time, it is further determined whether the current minimum temperature of the power battery is less than the first temperature threshold, where the first temperature threshold = Temp_High - (SOC - SOC_Min) × (Temp_High - Temp_Low) / (SOC_Max - SOC_Min), that is, the first temperature threshold = 12 - 16 * 18 / 19 = -3.15. In other words, when the current minimum temperature of the power battery -4 degrees Celsius is less than -3.15 degrees Celsius, the power battery is heated. Furthermore, as heating consumes the power battery's charge, the heating of the power battery needs to be stopped when the current state of charge (SOC) of the power battery is below 4%.

[0091] Furthermore, in some scenarios, if the current state of charge (SOC) of the power battery is 30%, it is not within the preset SOC range of 28%-9%, and therefore the power battery is not heated.

[0092] Furthermore, in some scenarios, as the power battery is heated, assuming the current minimum temperature of the power battery changes from -4 degrees Celsius to 13 degrees Celsius, if the current minimum temperature of the power battery 13 degrees Celsius is greater than or equal to the second temperature threshold of Temp_req = 13℃, then the heating of the power battery is stopped.

[0093] Example 2

[0094] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a power battery vehicle heating device disclosed in an embodiment of this application, as shown below. Figure 4 As shown, the apparatus in this embodiment includes the following functional modules:

[0095] The first acquisition module 201 is used to acquire the current state of charge (SOC) and the current minimum temperature of the power battery.

[0096] The first judgment module 202 is used to determine whether the current charge state SOC is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state.

[0097] The second judgment module 203 is used to determine whether the current minimum temperature of the power battery is less than the first temperature threshold when the current charge state SOC is within the preset SOC range.

[0098] The heating control module 204 is used to heat the power battery when the current minimum temperature of the power battery is less than a first temperature threshold. During the heating process, if the current state of charge (SOC) is not within a preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the power battery stops heating.

[0099] The device in this embodiment of the application obtains the current state of charge (SOC) and the current minimum temperature of the power battery, and then determines whether the current SOC is within a preset SOC range. The preset SOC range indicates that the power battery is in a low charge state. When the current SOC is within the preset SOC range, it determines whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. This increases the battery temperature and overcomes the technical problem of poor battery capacity retention at low temperatures. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the heating process is stopped.

[0100] Meanwhile, compared with the prior art, the embodiments of this application can heat the power battery only when the current SOC is in the numerical range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the extra power released by the battery is greater than the power consumed by heating, thereby obtaining the best range performance.

[0101] In this application embodiment, as an optional implementation, the left end of the preset SOC interval is the maximum value of the state of charge SOC, and the right end of the preset SOC interval is the minimum value of the state of charge SOC. Within the preset SOC interval, the state of charge SOC of the power battery is linearly related to the first temperature threshold. The minimum value of the state of charge SOC corresponds to the maximum value of the first temperature threshold, and the maximum value of the state of charge SOC corresponds to the minimum value of the first temperature threshold.

[0102] Furthermore, the apparatus in this application embodiment also includes the following functional modules:

[0103] The calculation module is used to calculate the first temperature threshold based on a formula before determining whether the current minimum temperature of the power battery is lower than the first temperature threshold. The formula is:

[0104] Tempset=Temp_H i gh-(SOC-SOC_M in)×(Temp_H i gh-Temp_Low) / (SOC_Max-SOC_M in);

[0105] Where Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum state of charge (SOC), SOC represents the current state of charge (SOC) of the power battery, SOC_Min represents the minimum state of charge (SOC), Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum state of charge (SOC), and SOC_Max represents the maximum state of charge (SOC).

[0106] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, avoiding the situation where the power battery will heat up too early under some operating conditions, causing the battery temperature to drop too much at the end of the trip, or heat up too late, causing the temperature to fail to reach the target at the end of the trip.

[0107] In this embodiment of the application, as an optional implementation, the apparatus further includes the following functional modules:

[0108] The second acquisition module is used to acquire the vehicle speed and identify whether the user has driving intentions based on the vehicle speed after the current minimum temperature of the power battery is lower than the first temperature threshold and before the power battery is heated.

[0109] In addition, the heating control module is also used to prevent the heating of the power battery from being triggered when the user does not intend to drive.

[0110] This optional implementation avoids ineffective heating when the user has no intention to drive after judging the user's driving intention.

[0111] It should be noted that for other detailed descriptions of the apparatus in the embodiments of this application, please refer to the relevant description in Embodiment 1 of this application, which will not be repeated in the embodiments of this application.

[0112] Example 3

[0113] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application, such as... Figure 5 As shown, the electronic device in this application embodiment includes:

[0114] Processor 301; and

[0115] The memory 302 is configured to store machine-readable instructions that, when executed by the processor 301, perform the power battery vehicle heating method as described in any of the foregoing embodiments.

[0116] The electronic device in this application embodiment, by executing a power battery heating method for vehicle operation, can obtain the current state of charge (SOC) and the current minimum temperature of the power battery, and then determine whether the current SOC is within a preset SOC range. The preset SOC range indicates that the power battery is in a low charge state. When the current SOC is within the preset SOC range, it can determine whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. This increases the battery temperature and overcomes the technical problem of poor battery capacity retention at low temperatures. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the power battery heating is stopped.

[0117] Meanwhile, compared with the prior art, the embodiments of this application can heat the power battery only when the current SOC is in the numerical range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the extra power released by the battery is greater than the power consumed by heating, thereby obtaining the best range performance.

[0118] Example 4

[0119] This application discloses a storage medium storing a computer program, which is executed by a processor as a power battery vehicle heating method according to any of the foregoing embodiments.

[0120] The storage medium in this embodiment of the application can obtain the current state of charge (SOC) and the current minimum temperature of the power battery by executing a power battery heating method. It can then determine whether the current SOC is within a preset SOC range, where the preset SOC range indicates that the power battery is in a low-charge state. Furthermore, when the current SOC is within the preset SOC range, it can determine whether the current minimum temperature of the power battery is less than a first temperature threshold. If the current minimum temperature is less than the first temperature threshold, the power battery is heated. This increases the battery temperature and overcomes the technical problem of poor battery capacity retention at low temperatures. During the heating process, if the current SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to a second temperature threshold, the heating process is stopped.

[0121] Meanwhile, compared with the prior art, the embodiments of this application can heat the power battery only when the current SOC is in the numerical range corresponding to the low charge state, and not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, so that the extra power released by the battery is greater than the power consumed by heating, thereby obtaining the best range performance.

[0122] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0123] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0124] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0125] It should be noted that if the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0126] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0127] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for heating a power battery while driving, characterized in that, The method includes: Obtain the current state of charge (SOC) and the current minimum temperature of the power battery; Determine whether the current state of charge (SOC) is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state; When the current state of charge (SOC) is within the preset SOC range, it is determined whether the current minimum temperature of the power battery is less than a first temperature threshold. When the current minimum temperature of the power battery is less than the first temperature threshold, the power battery is heated. During the heating process, if the current state of charge (SOC) is not within the preset SOC range, or the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery stops heating. Furthermore, the left endpoint of the preset SOC interval is the maximum value of the state of charge SOC, and the right endpoint of the preset SOC interval is the minimum value of the state of charge SOC. Within the preset SOC interval, the state of charge SOC of the power battery is linearly related to the first temperature threshold. The minimum value of the state of charge SOC corresponds to the maximum value of the first temperature threshold, and the maximum value of the state of charge SOC corresponds to the minimum value of the first temperature threshold. Furthermore, before determining whether the current minimum temperature of the power battery is less than a first temperature threshold, the method further includes: The first temperature threshold is calculated based on the following formula: Tempset=Temp_High - (SOC - SOC_Min)×(Temp_High-Temp_Low) / (SOC_Max-SOC_Min); Wherein, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum SOC value, SOC represents the current SOC value of the power battery, SOC_Min represents the minimum SOC value, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum SOC value, and SOC_Max represents the maximum SOC value. And, before heating the power battery after the current minimum temperature of the power battery is lower than the first temperature threshold, the method further includes: The vehicle speed is obtained and the user's driving intention is identified based on the vehicle speed. When the user has no intention of driving, the heating of the power battery will not be triggered.

2. The method as described in claim 1, characterized in that, The method further includes: If the vehicle speed is less than 1.5 km / h for 120 seconds during the heating process, the heating of the power battery will be stopped.

3. The method as described in claim 1, characterized in that, The process of acquiring vehicle speed and identifying whether the user intends to drive based on the vehicle speed includes: If the vehicle speed is greater than 5 km / h for 30 seconds, it is determined that the user has the intention to drive; otherwise, it is determined that the user does not have the intention to drive.

4. A power battery vehicle heating device, characterized in that, The device includes: The first acquisition module is used to acquire the current state of charge (SOC) of the power battery and the current minimum temperature of the power battery. The first judgment module is used to determine whether the current state of charge (SOC) is within a preset SOC range, wherein the preset SOC range indicates that the power battery is in a low charge state. The second judgment module is used to determine whether the current minimum temperature of the power battery is less than a first temperature threshold when the current state of charge (SOC) is within the preset SOC range. A heating control module is used to heat the power battery when the current minimum temperature of the power battery is less than the first temperature threshold. During the heating process, when the current state of charge (SOC) is not within the preset SOC range, or when the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery stops heating. Furthermore, the left endpoint of the preset SOC interval is the maximum value of the state of charge SOC, and the right endpoint of the preset SOC interval is the minimum value of the state of charge SOC. Within the preset SOC interval, the state of charge SOC of the power battery is linearly related to the first temperature threshold. The minimum value of the state of charge SOC corresponds to the maximum value of the first temperature threshold, and the maximum value of the state of charge SOC corresponds to the minimum value of the first temperature threshold. The device also includes: The calculation module is used to calculate the first temperature threshold based on a formula before determining whether the current minimum temperature of the power battery is less than the first temperature threshold. The formula is: Tempset=Temp_High - (SOC - SOC_Min)×(Temp_High-Temp_Low) / (SOC_Max-SOC_Min); Wherein, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum SOC value, SOC represents the current SOC value of the power battery, SOC_Min represents the minimum SOC value, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum SOC value, and SOC_Max represents the maximum SOC value. The device also includes: The second acquisition module is used to acquire the vehicle speed and identify whether the user has a driving intention based on the vehicle speed after the current minimum temperature of the power battery is less than the first temperature threshold and before the power battery is heated. Furthermore, the heating control module is also configured to prevent the heating of the power battery from being triggered when the user does not intend to drive.

5. An electronic device, characterized in that, include: processor; as well as A memory configured to store machine-readable instructions that, when executed by the processor, perform the power battery vehicle heating method as described in any one of claims 1-3.

6. A storage medium, characterized in that, The storage medium stores a computer program, which is executed by a processor as described in any one of claims 1-3, for the power battery vehicle heating method.

Images