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

Abstract

The invention provides a power battery driving heating method and device, electronic equipment and a storage medium, and the power battery driving heating method comprises the steps: obtaining the current state of charge (SOC) of a power battery and the current minimum temperature of the power battery; judging whether the current state of charge (SOC) is within a preset SOC interval or not; when the current minimum temperature of the power battery is smaller than the first temperature threshold value, the power battery is heated. In the driving process, the pure electric vehicle power battery can be heated, and the technical problem that the battery capacity retention rate is poor at the low temperature is solved. And meanwhile, the electric quantity discharged by the battery can be larger than the electric quantity consumed by heating, so that the optimal endurance performance is obtained.

Description

Technical Field

[0001] The present application relates to the field of electric vehicles, and more specifically, to a method, device, electronic device and storage medium for heating a power battery during driving. Background Art

[0002] The battery capacity and discharge rate of the power battery will be affected by the temperature of the power battery. Usually, when the temperature of the power battery is low, the battery capacity and discharge rate of the power battery will also be low. In this way, when the temperature of the power battery is low, the battery capacity and discharge rate of the power battery will also be low, and the power battery cannot provide enough power for the electric vehicle, making the power performance of the electric vehicle unable to meet the power requirements.

[0003] In order to solve the problem that the power performance of the power battery at low temperature cannot meet the power demand, the main solution in the existing technology is to heat the power battery, thereby increasing the temperature of the power battery, thereby increasing the battery capacity and discharge rate of the power battery, and finally increasing the power output of the power battery.

[0004] Although the above solution can provide power output by heating the power battery and causing the power battery to release more electricity, heating the power battery consumes energy. In some scenarios, the energy consumed by heating the power battery is greater than the extra electricity released by the power battery, which is a negative benefit for the endurance performance of the power battery, i.e., it reduces the endurance performance of the power battery. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a driving power battery heating method, device, electronic device and storage medium, which are used to heat the power battery of a pure electric vehicle during driving, so as to overcome the technical problem that the battery has a poor battery capacity retention rate at low temperatures. At the same time, the present application can also make the battery discharge more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

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

[0007] Acquire a current state of charge SOC of a power battery and a current minimum temperature of the power battery;

[0008] Determining whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval 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, determining 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, wherein during the heating process, when 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 exits heating.

[0011] The method of the present application obtains the current state of charge SOC of the power battery and the current minimum temperature of the power battery, thereby determining whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state, and thereby determining 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 interval, and thereby heating the power battery when the current minimum temperature of the power battery is less than the first temperature threshold, thereby overcoming the technical problem of poor battery capacity retention rate at low temperatures by increasing the temperature of the battery, wherein during the heating process, when the current state of charge SOC is not within the preset SOC interval, or the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0012] At the same time, compared with the prior art, the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0013] In an optional embodiment, 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 a calculation formula, which is:

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

[0017] Among them, Tempset represents the first temperature threshold, Temp_H i gh represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the state of charge SOC.

[0018] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, thereby avoiding the power battery under some operating conditions causing the battery temperature to drop too much at the end of driving due to premature heating, or the temperature failing to reach the target at the end of driving due to late heating.

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

[0020] Acquiring the vehicle speed and identifying whether the user has driving intention based on the vehicle speed;

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

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

[0023] In an optional embodiment, the method further comprises:

[0024] During the heating process, if the vehicle speed is less than 1.5 km / h for 120 seconds, the heating of the power battery is terminated.

[0025] In this optional implementation, the power battery can be stopped from being heated when the vehicle speed is less than 1.5 km / h for 120 seconds, thereby avoiding ineffective heating of the power battery.

[0026] In an optional implementation manner, obtaining the vehicle speed and identifying whether the user has a driving intention 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 has no intention to drive.

[0028] This optional implementation manner 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 is determined that the user has no intention to drive.

[0029] In a second aspect, the present invention provides a power battery driving heating device, the device comprising:

[0030] A first acquisition module, used to acquire a current state of charge SOC of a power battery and a current minimum temperature of the power battery;

[0031] A first judgment module is used to judge whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state;

[0032] A second judgment module, configured to judge 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 interval;

[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, wherein during the heating process, when 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 exits heating.

[0034] The device of the present application obtains the current state of charge SOC of the power battery and the current minimum temperature of the power battery, and then can determine whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state, and then can 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 interval, and then can heat the power battery when the current minimum temperature of the power battery is less than the first temperature threshold, thereby overcoming the technical problem of poor battery capacity retention rate at low temperatures by increasing the temperature of the battery, wherein, during the heating process, when the current state of charge SOC is not within the preset SOC interval and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0035] At the same time, compared with the prior art, the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0036] In an optional embodiment, 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] And, the device further comprises:

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

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

[0040] Among them, Tempset represents the first temperature threshold, Temp_H i gh represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the state of charge SOC.

[0041] This optional implementation can accurately calculate the first temperature threshold corresponding to the current SOC through the above calculation formula, thereby avoiding the power battery under some operating conditions causing the battery temperature to drop too much at the end of driving due to premature heating, or the temperature failing to reach the target at the end of driving due to late heating.

[0042] In an optional embodiment, the device further comprises:

[0043] a second acquisition module, configured to acquire a 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 used to not trigger the heating of the power battery when the user has no driving intention.

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

[0046] In a third aspect, the present invention provides an electronic device, comprising:

[0047] Processor; and

[0048] The memory is configured to store machine-readable instructions, which, when executed by the processor, execute the method for heating a power battery while driving as described in any one of the aforementioned embodiments.

[0049] The electronic device of the present application can obtain the current state of charge SOC of the power battery and the current minimum temperature of the power battery by executing the power battery driving heating method, and then can judge whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state, and then when the current state of charge SOC is within the preset SOC interval, it can judge whether the current minimum temperature of the power battery is less than a first temperature threshold, and then when the current minimum temperature of the power battery is less than the first temperature threshold, the power battery can be heated, thereby overcoming the technical problem of poor battery capacity retention rate at low temperature by increasing the battery temperature, wherein, during the heating process, when the current state of charge SOC is not within the preset SOC interval and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0050] At the same time, compared with the prior art, the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0051] In a fourth aspect, the present invention provides a storage medium storing a computer program, wherein the computer program is executed by a processor to implement a method for heating a power battery while driving as described in any one of the aforementioned embodiments.

[0052] The storage medium of the present application can obtain the current state of charge SOC of the power battery and the current minimum temperature of the power battery by executing the power battery driving heating method, and then can judge whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state, and then when the current state of charge SOC is within the preset SOC interval, it can be judged whether the current minimum temperature of the power battery is less than a first temperature threshold, and then when the current minimum temperature of the power battery is less than the first temperature threshold, the power battery can be heated, thereby overcoming the technical problem of poor battery capacity retention rate at low temperature by increasing the battery temperature, wherein, during the heating process, when the current state of charge SOC is not within the preset SOC interval and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0053] At the same time, compared with the prior art, the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 It is a schematic diagram of a flow chart of a method for heating a power battery during driving disclosed in an embodiment of the present application;

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

[0057] Figure 3 This is a schematic diagram of parking duration distribution disclosed in an embodiment of the present application;

[0058] Figure 4 It is a structural schematic diagram of a power battery driving heating device disclosed in an embodiment of the present application;

[0059] Figure 5 It is a structural schematic diagram of an electronic device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0061] Embodiment 1

[0062] See also Figure 1 , Figure 1 is a schematic diagram of a flow chart of a power battery driving heating method disclosed in an embodiment of the present application, such as Figure 1 As shown, the method of the embodiment of the present application includes the following steps:

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

[0064] 102. 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;

[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 a 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, 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, and the power battery exits heating. It should be noted that the current state of charge SOC is not within the preset SOC range, which may mean that the current state of charge SOC is less than the minimum value of the state of charge SOC.

[0067] The method of the embodiment of the present application obtains the current state of charge SOC and the current minimum temperature of the power battery, and then determines 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, and then when the current state of charge SOC is within the preset SOC range, it is possible to determine whether the current minimum temperature of the power battery is less than a first temperature threshold, and then when the current minimum temperature of the power battery is less than the first temperature threshold, the power battery can be heated, thereby overcoming the technical problem of poor battery capacity retention rate at low temperatures by increasing the temperature of the battery, wherein during the heating process, if the current state of charge SOC is less than the minimum value of the state of charge SOC, or the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0068] At the same time, compared with the prior art, the embodiment of the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0069] The present application can ensure that after entering the heating preset interval, the battery can be heated to the target temperature, or can ensure that the additional amount of electricity released by heating is greater than the amount of electricity consumed by heating.

[0070] In an embodiment of the present application, with respect to step 101, the current state of charge SOC of the power battery and the current minimum temperature of the power battery can be obtained through a battery management system BMS, wherein the current state of charge 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 provided at three locations of the power battery, respectively, and each temperature sensor outputs a temperature detection value, the minimum detection value of the three temperature detection values ​​is taken as the current minimum temperature of the power battery.

[0071] In the embodiment of the present application, with respect to step 102, it should be noted that the definition of a 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, wherein the definition of a power battery being in a low charge state under each model shall refer to the technical standards in the prior art, and the embodiment of the present application does not limit this.

[0072] In the embodiments of the present application, as an optional implementation, please refer to Figure 2 , Figure 2 Schematic diagram of the corresponding relationship between SOC and temperature disclosed in the embodiment of the present application. Figure 2 As shown, the left end point of the preset SOC interval is the maximum value of the state of charge SOC, and the right end point 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, and 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. In addition, Figure 2As shown, based on the relationship between SOC and temperature, the first temperature threshold corresponding to the SOC can be determined, so that under different SOCs, a suitable first temperature threshold is used to determine whether the temperature conditions required for heating the power battery are met, thereby avoiding premature heating or late heating. For example, under the condition that the current state of charge SOC is 27%, 5 degrees Celsius is used as the first temperature threshold instead of 10 degrees Celsius. In this way, premature heating can be avoided under the premise that the performance of the power battery will not be reduced too much at 10 degrees Celsius.

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

[0074] The first temperature threshold is calculated based on the calculation formula, which is:

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

[0076] Among them, Tempset represents the first temperature threshold, Temp_H i gh represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the 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, thereby avoiding the power battery under some operating conditions causing the battery temperature to drop too much at the end of driving due to premature heating, or the temperature failing to reach the target at the end of driving due to late heating.

[0078] In the embodiment of the present application, as an optional implementation, after the current minimum temperature of the power battery is less than the first temperature threshold and before the power battery is heated, the method of the embodiment of the present application further includes the following steps:

[0079] Obtain vehicle speed and identify whether the user intends to drive based on the vehicle speed;

[0080] When the user has no intention to drive, heating of the power battery is not triggered.

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

[0082] With respect to the above optional implementation manner, the vehicle speed refers to the speed of the vehicle in which the power battery is located, which can be read from the central control panel of the vehicle.

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

[0084] During the heating process, if the vehicle speed is less than 1.5km / h for 120s, the heating of the power battery will be exited.

[0085] In this optional implementation, the power battery can be stopped from being heated when the vehicle speed is less than 1.5 km / h for 120 seconds, thereby avoiding ineffective heating of the power battery.

[0086] In the embodiment of the present application, as an optional implementation, the step of obtaining 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 has no intention to drive.

[0088] This optional implementation manner 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 is determined that the user has no intention to drive.

[0089] For the above optional implementation, the vehicle speed duration can be based on Figure 3 Determine, among which, Figure 3 The parking time when the user intends to park is counted, so as to form the interval time distribution of the user's parking and then continuing to drive, such as Figure 3 As shown, under normal circumstances, if the user intends to park, the parking duration is 63.8, so 63.8 can be used as the duration judgment value, that is, if the parking duration exceeds 63.8, it means that the user has no intention to drive, and if not, it means that the user has the intention to drive. Furthermore, in order to respond to power output faster, when the vehicle speed is high, 63.8 is changed to 30, so that the heating condition can be reached faster when the vehicle speed is high, so that the power response of the power battery is faster. On the other hand, when the vehicle speed is low, 63.8 is changed to 120, which can make the conditions for exiting heating more difficult to achieve, thereby preventing premature exit of heating at low speeds. It should be noted that Figure 3 This is a schematic diagram of parking duration distribution disclosed in an embodiment of the present application.

[0090] In the embodiment of the present application, as an example, taking the calibration result of a certain battery as an example, assuming that 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 located within the preset SOC interval 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, wherein 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, that is, 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 the heating consumes the power of the power battery, it is necessary to stop heating the power battery when the current state of charge SOC of the power battery is lower than 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 thus the power battery is not heated.

[0092] Furthermore, in some scenarios, as the power battery is heated, assuming that the current minimum temperature of the power changes from -4 degrees Celsius to 13 degrees Celsius, at this time, the current minimum temperature of the power 13 degrees Celsius is greater than or equal to the second temperature threshold Temp_req=13°C, then the power battery heating is exited.

[0093] Embodiment 2

[0094] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a power battery driving heating device disclosed in an embodiment of the present application, such as Figure 4 As shown, the device of the embodiment of the present application includes the following functional modules:

[0095] A first acquisition module 201 is used to acquire a current state of charge SOC of the power battery and a current minimum temperature of the power battery;

[0096] A first judgment module 202 is used to judge 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;

[0097] The second judgment module 203 is used to judge 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 a 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 the first temperature threshold. During the heating process, if the current state of charge SOC is not within the preset SOC range and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, the power battery exits heating.

[0099] The device of the embodiment of the present application obtains the current state of charge SOC and the current minimum temperature of the power battery, and then can 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, and then when the current state of charge 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, and then when the current minimum temperature of the power battery is less than the first temperature threshold, the power battery can be heated, thereby overcoming the technical problem of poor battery capacity retention rate at low temperatures by increasing the temperature of the battery, wherein, during the heating process, the current state of charge SOC is not within the preset SOC range, and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, and the power battery exits heating.

[0100] At the same time, compared with the prior art, the embodiment of the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0101] In the embodiment of the present application, as 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;

[0102] Furthermore, the device of the embodiment of the present application further includes the following functional modules:

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

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

[0105] Among them, Tempset represents the first temperature threshold, Temp_H i gh represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the 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, thereby avoiding the power battery under some operating conditions causing the battery temperature to drop too much at the end of driving due to premature heating, or the temperature failing to reach the target at the end of driving due to late heating.

[0107] In the embodiment of the present application, as an optional implementation, the device in the embodiment of the present application further includes the following functional modules:

[0108] A 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;

[0109] Furthermore, the heating control module is used to not trigger the heating of the power battery when the user has no intention to drive.

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

[0111] It should be noted that for other detailed descriptions of the device in the embodiment of the present application, please refer to the relevant description of the embodiment of the present application, and the embodiment of the present application will not go into details.

[0112] Embodiment 3

[0113] See also Figure 5 , Figure 5 is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application, such as Figure 5 As shown, the electronic device of the embodiment of the present application includes:

[0114] Processor 301; and

[0115] The memory 302 is configured to store machine-readable instructions. When the instructions are executed by the processor 301, the method for heating a power battery while driving is performed as described in any one of the aforementioned embodiments.

[0116] The electronic device of the embodiment of the present application can obtain the current state of charge SOC and the current minimum temperature of the power battery by executing the power battery driving heating method, and then can judge 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, and then when the current state of charge SOC is within the preset SOC range, it can judge whether the current minimum temperature of the power battery is less than a first temperature threshold, and then when the current minimum temperature of the power battery is less than the first temperature threshold, the power battery can be heated, thereby overcoming the technical problem of poor battery capacity retention rate at low temperature by increasing the temperature of the battery, wherein, during the heating process, the current state of charge SOC is not within the preset SOC range, and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, and the power battery exits heating.

[0117] At the same time, compared with the prior art, the embodiment of the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0118] Embodiment 4

[0119] An embodiment of the present application discloses a storage medium, which stores a computer program. The computer program is executed by a processor as a method for heating a power battery while driving, such as any one of the aforementioned implementations.

[0120] The storage medium of the embodiment of the present application can obtain the current state of charge SOC and the current minimum temperature of the power battery by executing the power battery driving heating method, and then can judge whether the current state of charge SOC is within the preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state, and then when the current state of charge SOC is within the preset SOC interval, it can be judged whether the current minimum temperature of the power battery is less than the first temperature threshold, and then the power battery can be heated when the current minimum temperature of the power battery is less than the first temperature threshold, thereby overcoming the technical problem of poor battery capacity retention rate at low temperature by increasing the temperature of the battery, wherein, during the heating process, the current state of charge SOC is not within the preset SOC interval, and the current minimum temperature of the power battery is greater than or equal to the second temperature threshold, and the power battery exits heating.

[0121] At the same time, compared with the prior art, the embodiment of the present application can heat the power battery only when the current SOC is within the numerical range corresponding to the low charge state, and does not heat the power battery when the current SOC is in the high charge state, thereby reducing the energy consumption caused by heating, and making the battery release more electricity than the electricity consumed by heating, thereby obtaining the best endurance performance.

[0122] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0123] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

[0125] It should be noted that if the function is implemented in the form of a software function 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0126] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0127] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for heating a power battery during driving, characterized in that: The method comprises: Acquire a current state of charge SOC of a power battery and a current minimum temperature of the power battery; Determining whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state; When the current state of charge SOC is within the preset SOC range, determining 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, wherein during the heating process, when 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 exits heating.

2. The method according to claim 1, characterized in that The left end point of the preset SOC interval is the maximum value of the state of charge SOC, and the right end point 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 a calculation formula, which is: Tempset=Temp_High-(SOC-SOC_Min)×(Temp_High-Temp_Low) / (SOC_Max-SOC_Min); Among them, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the state of charge SOC.

3. The method according to claim 1, characterized in that After the current minimum temperature of the power battery is less than the first temperature threshold and before heating the power battery, the method further includes: Acquiring the vehicle speed and identifying whether the user has driving intention based on the vehicle speed; When the user has no driving intention, the heating of the power battery is not triggered.

4. The method according to claim 3, characterized in that The method further comprises: During the heating process, if the vehicle speed is less than 1.5 km / h for 120 seconds, the heating of the power battery is terminated.

5. The method according to claim 3, characterized in that The obtaining of the vehicle speed and identifying whether the user has a driving intention 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 has no intention to drive.

6. A power battery driving heating device, characterized in that: The device comprises: A first acquisition module, used to acquire a current state of charge SOC of a power battery and a current minimum temperature of the power battery; A first judgment module is used to judge whether the current state of charge SOC is within a preset SOC interval, wherein the preset SOC interval indicates that the power battery is in a low charge state; A second judgment module, configured to judge 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 interval; 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, wherein during the heating process, when 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 exits heating.

7. The device according to claim 6, characterized in that The left end point of the preset SOC interval is the maximum value of the state of charge SOC, and the right end point 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; And, the device further comprises: A calculation module is used to calculate the first temperature threshold based on a calculation formula before determining whether the current minimum temperature of the power battery is less than the first temperature threshold, and the calculation formula is: Tempset=Temp_High-(SOC-SOC_Min)×(Temp_High-Temp_Low) / (SOC_Max-SOC_Min); Among them, Tempset represents the first temperature threshold, Temp_High represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, SOC represents the current state of charge SOC of the power battery, SOC_Min represents the minimum value of the state of charge SOC, Temp_Low represents the maximum value of the first temperature threshold corresponding to the minimum value of the state of charge SOC, and SOC_Max represents the maximum value of the state of charge SOC.

8. The device according to claim 6, characterized in that The device also includes: a second acquisition module, configured to acquire a 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 used to not trigger the heating of the power battery when the user has no driving intention.

9. An electronic device, characterized in that: include: processor; as well as A memory configured to store machine-readable instructions, which, when executed by the processor, execute the method for heating a power battery while driving as described in any one of claims 1 to 5.

10. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is executed by a processor to implement the method for heating a power battery while driving as described in any one of claims 1 to 7.

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