Battery heating control method, device and vehicle

Abstract

The application discloses a battery heating control method and device and a vehicle. The method comprises the following steps: obtaining an actual discharge power of a battery and a target power range, wherein the target power range is a discharge power range meeting basic power requirements of the vehicle; and in the case that the actual discharge power enters the target power range, a closed-loop control strategy is used to control the temperature of the battery to be maintained in a target temperature range, wherein the target temperature range is determined according to the target power range and the power of the battery. According to the battery heating control method, the power performance of the vehicle and the endurance of the battery can be ensured simultaneously.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery heating control method and device and a vehicle. BACKGROUND

[0002] With the development of vehicle technology, more and more vehicles use batteries as power sources. The discharge capacity of a battery is greatly affected by the temperature of the battery. When the temperature of the battery is low, the discharge capacity of the battery is weak. Therefore, in the case that the temperature of the battery is low, in order to ensure the power performance of the vehicle, the battery often needs to be heated to increase the temperature. However, battery heating consumes a large amount of electricity, affecting the endurance of the battery. Therefore, how to ensure the power performance of the vehicle and the endurance of the battery is very important.

[0003] Therefore, there is an urgent need for a battery heating control method to simultaneously ensure the power performance of the vehicle and the endurance of the battery. SUMMARY

[0004] The embodiments of the application provide a battery heating control method, device, vehicle, computer readable storage medium and computer program product, which can simultaneously ensure the power performance of the vehicle and the endurance of the battery.

[0005] In a first aspect, the embodiments of the application provide a battery heating control method, which comprises:

[0006] obtaining an actual discharge power of a battery and a target power range, the target power range being a discharge power range meeting basic power requirements of a vehicle;

[0007] in the case that the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained in a target temperature range according to a closed-loop control strategy, the target temperature range being determined according to the target power range and the power of the battery.

[0008] In a possible implementation manner, before the controlling the temperature of the battery to be maintained in the target temperature range according to the closed-loop control strategy in the case that the actual discharge power enters the target power range, the method further comprises:

[0009] obtaining an estimated heating rate and a discharge drop rate of the battery;

[0010] the controlling the temperature of the battery to be maintained in the target temperature range according to the closed-loop control strategy in the case that the actual discharge power enters the target power range comprises:

[0011] In a case that the estimated heating rate is greater than the discharge decreasing rate and the actual discharge power enters the target power range, a closed-loop control strategy is used to control the temperature of the battery to be maintained in the target temperature range.

[0012] In a possible implementation, the obtaining of the estimated heating rate of the battery comprises:

[0013] obtaining a full-power heating curve representing a corresponding relationship among battery power, battery temperature and battery discharge power in a case that the battery is heated according to a battery maximum heating power corresponding to the battery;

[0014] determining a slope of the full-power heating curve as the estimated heating rate.

[0015] In a possible implementation, the obtaining of the full-power heating curve comprises:

[0016] obtaining an ambient temperature, a battery temperature, a battery heat transfer coefficient, a battery maximum heating power, a battery energy, a battery heat capacity and an average power consumption, the average power consumption being an average power consumption except for the battery heating power in a process of vehicle driving;

[0017] representing a battery heat dissipation power by using the ambient temperature, the battery temperature and the battery heat transfer coefficient;

[0018] representing a temperature rising rate by using the battery maximum heating power, the battery heat dissipation power and the battery heat capacity;

[0019] representing a power decreasing rate by using the battery maximum heating power, the average power consumption and the battery energy;

[0020] constructing the full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the power decreasing rate.

[0021] In a possible implementation, the constructing of the full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the power decreasing rate comprises:

[0022] constructing an initial full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the power decreasing rate;

[0023] obtaining an estimated residual power when the vehicle drives to an end of a trip;

[0024] determining an estimated battery temperature according to a first target discharge power and the estimated residual power, the first target discharge power being a discharge power meeting a basic power demand of the vehicle, and the first target discharge power belonging to the target power range;

[0025] substituting the estimated residual power and the estimated battery temperature into the initial full-power heating curve, outputting an integral constant;

[0026] determining the full-power heating curve according to the initial full-power heating curve and the integral constant.

[0027] In a possible implementation, the method further includes:

[0028] in a case where the estimated heating rate is less than or equal to the discharge drop rate and the actual discharge power reaches a second target discharge power, heating the battery according to the maximum battery heating power, the second target discharge power being a discharge power on the full-power heating curve.

[0029] In a possible implementation, in the case where the actual discharge power enters the target power range, the temperature of the battery is controlled to be maintained in a target temperature range according to a closed-loop control strategy, including:

[0030] in a case where an estimated driving range of the vehicle is greater than a preset range and the actual discharge power enters the target power range, the temperature of the battery is controlled to be maintained in a target temperature range according to a closed-loop control strategy.

[0031] In a second aspect, an embodiment of the present application provides a battery heating control device, which includes:

[0032] a first obtaining module, configured to obtain an actual discharge power of a battery and a target power range, the target power range being a discharge power range meeting a basic power demand of a vehicle;

[0033] a control module, configured to, in a case where the actual discharge power of the battery enters the target power range, control the temperature of the battery to be maintained in a target temperature range according to a closed-loop control strategy, the target temperature range being determined according to the target power range and the power of the battery.

[0034] In a third aspect, an embodiment of the present application provides a vehicle, which includes a processor and a memory storing computer program instructions.

[0035] The processor implements the method in any possible implementation method of the first aspect when executing the computer program instructions.

[0036] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores computer program instructions, and the computer program instructions are executed by a processor to implement the method in any possible implementation method of the first aspect.

[0037] In a fifth aspect, an embodiment of the present application provides a computer program product, instructions in the computer program product being executed by a processor of an electronic device to cause the electronic device to perform the method in any possible implementation of the method in the first aspect.

[0038] In the embodiment of the present application, since the target power range is a power range meeting the basic power demand of the vehicle, and the target temperature range is determined according to the target power range and the power of the battery, by controlling the temperature of the battery to be maintained in the target temperature range according to the closed-loop control strategy in the case that the actual discharge power of the battery enters the target power range (i.e., the actual discharge power is reduced to the maximum discharge power in the target power range), the actual discharge power can be guaranteed to be stable in the target power range, so as to guarantee the power performance of the vehicle and the endurance capability of the battery at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows, and other drawings can also be obtained by those of ordinary skill in the art without creative labor on the basis of these drawings.

[0040] Figure 1 is a flow diagram of a battery heating control method provided by an embodiment of the present application;

[0041] Figure 2 is a schematic diagram of a power boundary curve provided by an embodiment of the present application;

[0042] Figure 3 is a schematic diagram of a target power range provided by an embodiment of the present application;

[0043] Figure 4 is a schematic diagram of a full-power heating curve provided by an embodiment of the present application;

[0044] Figure 5 is a schematic diagram of another full-power heating curve provided by an embodiment of the present application;

[0045] Figure 6 is a schematic diagram of heating the battery along the full-power heating curve provided by an embodiment of the present application;

[0046] Figure 7 is a structural schematic diagram of a battery heating control device provided by an embodiment of the present application;

[0047] Figure 8 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0048] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0050] As described in the background section, when the battery temperature is low, it is often necessary to heat the battery to maintain the vehicle's power performance. However, heating the battery consumes a significant amount of electricity, affecting its driving range. Therefore, it is crucial to ensure both the vehicle's power performance and the battery's driving range.

[0051] Currently, the decision to heat the battery, and the magnitude of the heating power, is typically determined based on the battery discharge power threshold or battery temperature threshold. However, due to the uncertainty of vehicle travel, relying solely on discharge power or battery temperature to determine the heating control strategy often leads to wasted battery energy. Therefore, a more rational planning of the battery heating strategy is needed.

[0052] It's important to note that some of the energy consumed by battery heating can be converted into the battery's internal energy for temperature increase, while the rest is dissipated through heat exchange between the battery and the environment. Therefore, to minimize energy dissipation, battery heating should be delayed as much as possible, and the battery temperature should be kept as low as possible while still meeting the battery's discharge power requirements. Furthermore, if the vehicle's total journey distance is short, heating the battery is not very meaningful; therefore, considering the driver might end the journey early, battery heating should also be delayed as much as possible.

[0053] Based on this, in order to solve the problems of the prior art, embodiments of this application provide a battery heating control method, apparatus, vehicle, computer-readable storage medium, and computer program product.

[0054] The battery heating control method provided in the embodiments of this application will be described below.

[0055] Figure 1 A schematic flowchart of a battery heating control method provided in an embodiment of this application is shown. Figure 1 As shown, the battery heating control method provided in this application includes the following steps:

[0056] S110. Obtain the actual discharge power and target power range of the battery. The target power range is the discharge power range that meets the basic power requirements of the vehicle.

[0057] S120. When the actual discharge power enters the target power range, the battery temperature is controlled to remain within the target temperature range according to the closed-loop control strategy. The target temperature range is determined based on the target power range and the battery's charge level.

[0058] In the battery heating control method of this application embodiment, since the target power range is the power range that meets the basic power requirements of the vehicle, and the target temperature range is determined based on the target power range and the battery charge, by controlling the battery temperature to remain within the target temperature range according to the closed-loop control strategy when the actual discharge power of the battery enters the target power range (i.e., the actual discharge power decreases to the maximum discharge power in the target power range), the actual discharge power can be kept stable within the target power range, thereby ensuring both the vehicle's power performance and the battery's range.

[0059] The specific implementation methods for each of the above steps are described below.

[0060] In some embodiments, in S110, the battery can be used to power the vehicle. The actual discharge power of the battery can be the discharge power of the battery during vehicle operation. Additionally, the target power range can be a power range determined based on a first target discharge power. The first target discharge power can be a discharge power that meets the basic power requirements of the vehicle. The first target discharge power can be evaluated based on vehicle parameters such as vehicle weight, speed, and acceleration performance. The process of evaluating the first target discharge power based on the aforementioned vehicle parameters can be found in existing technology and will not be detailed here. After determining the first target discharge power, by considering the fluctuation of the discharge power, a fluctuation power is added to the first target discharge power to obtain the target power range. The target power range can meet the basic power requirements of the vehicle. For example, if the first target discharge power is 65 kW and the fluctuation power is ±5 kW, then the target power range can be denoted as [60 kW, 70 kW].

[0061] Based on this, a schematic diagram of a power boundary curve provided in the embodiments of this application can be as follows: Figure 2 As shown. The power boundary curve can be determined based on the first target discharge power. Additionally, Figure 2 The table in the table can be a discharge power map. In the discharge power map, the horizontal axis can be the battery capacity, i.e., the battery state of charge (SoC), and the vertical axis can be the battery temperature. The values ​​in the cells can represent the battery discharge power. That is, the discharge power map can represent the correspondence between battery capacity, battery temperature, and battery discharge power.

[0062] exist Figure 2 In the power boundary curve, when the actual discharge power is below the actual discharge power, it indicates that the actual discharge power meets the vehicle's basic power requirements. When the actual discharge power is above the actual discharge power boundary curve, it indicates that the actual discharge power does not meet the vehicle's basic power requirements.

[0063] Additionally, a schematic diagram of a target power range provided in this application embodiment can be as follows: Figure 3 As shown. In Figure 3 In this process, the target power range can be determined jointly by curves A and B. When the actual discharge power is below curve B, it indicates that the actual discharge power meets the vehicle's basic power requirements. When the actual discharge power is above curve A, it indicates that the actual discharge power does not meet the vehicle's basic power requirements. When the actual discharge power is between curves A and B, it indicates that a heating control strategy is being implemented to ensure that the actual discharge power meets the vehicle's basic power requirements.

[0064] It should be noted that as the battery charge gradually decreases, the actual discharge power of the battery will also gradually decrease. Before the actual discharge power drops to the maximum discharge power within the target power range, the battery discharge power can be considered to be in stage 1. If the actual discharge power drops to the maximum discharge power within the target power range, it indicates that the actual discharge power is entering the target power range, and the battery discharge power can be considered to be entering stage 2.

[0065] Therefore, as Figure 3 As shown, if the actual discharge power is in stage 1, it means that the actual discharge power meets the basic power requirements of the vehicle and has a certain margin, so there is no need to heat the battery. If the actual discharge power enters stage 2, it means that the actual discharge power just meets the basic power requirements of the vehicle, and the battery needs to be heated in stage 2.

[0066] In some embodiments, in S120, if a target power range and battery capacity are determined, the target temperature range can be determined by substituting the target power range and battery capacity into a discharge power map table. Similarly, if a first target discharge power and battery capacity are determined, the target temperature can be determined by substituting the first target discharge power and battery capacity into a discharge power map table.

[0067] As an example, if the actual discharge power decreases to the maximum discharge power within the target power range, that is, the actual discharge power is equal to... Figure 3 If curve B intersects, it means that the actual discharge power is entering the target power range, and the battery can be heated.

[0068] As a more concrete example, by heating the battery with a target temperature as the objective and following a closed-loop control strategy, the battery temperature can be maintained within the target temperature range. In the closed-loop control strategy, the goal is to maintain the battery temperature within the target range. The heating power is calculated based on the proportional-integral-derivative (PID) algorithm, and the battery is heated according to the heating power.

[0069] However, in reality, batteries have a relatively large heat capacity. If the battery's heat capacity is large, the heating rate may not keep up with the discharge rate. The discharge rate can be related to vehicle speed and other operating conditions, so it needs to be considered on a case-by-case basis. If the heating rate is less than the discharge rate, it may not be possible to heat the battery according to the closed-loop control strategy in stage 2.

[0070] Based on this, in order to heat the battery according to the closed-loop control strategy in stage 2, in some embodiments, before the above-described S120, the following may also be included:

[0071] Obtain the estimated heating rate and discharge rate of the battery.

[0072] Based on this, the aforementioned S120 may specifically include:

[0073] If the estimated heating rate is greater than the discharge rate and the actual discharge power is within the target power range, the battery temperature is maintained within the target temperature range according to the closed-loop control strategy.

[0074] Here, the estimated heating rate can be the possible heating rate of the battery during heating, which is estimated in advance before actual heating control. The discharge rate decrease can be the rate of decrease of SOC, the rate of decrease of discharge power, or a rate of decrease determined by both the rate of decrease of SOC and the rate of decrease of discharge power; it is not limited here.

[0075] Alternatively, if the estimated heating rate is less than or equal to the discharge rate, the battery can be heated according to the battery's maximum heating power.

[0076] Therefore, to ensure the accuracy of the estimated heating rate, in some embodiments, obtaining the estimated heating rate of the battery may specifically include:

[0077] Obtain the full-power heating curve, which represents the relationship between battery capacity, battery temperature, and battery discharge power when the battery is heated according to the maximum heating power of the corresponding battery.

[0078] The slope of the full-power heating curve is used as the estimated heating rate.

[0079] Here, the curve function corresponding to the full-power heating curve can be represented by the following formula (1):

[0080]

[0081] In formula (1), SOC can represent the battery charge; T can represent the battery temperature; P heat This can represent the battery's maximum heating power; P drive It can represent the average electrical power consumption of a vehicle during operation, excluding battery heating power; K rad It can represent the heat transfer coefficient of a battery; T amb It can represent ambient temperature; C bat It can represent the battery's heat capacity; E bat C can represent battery energy; C can represent the integral constant.

[0082] In formula (1), the average power consumption can be determined based on the vehicle speed during driving, the historical average power consumption, or the average vehicle speed estimated in the navigation software; no specific limitation is made here. Additionally, battery energy can be the product of battery charge and voltage.

[0083] A schematic diagram of a full-power heating curve provided in this application embodiment can be seen as follows: Figure 4 As shown. In Figure 4 If the slope of the power boundary curve is regarded as the discharge decrease rate, then when the full power heating curve is full power heating curve 1, the estimated heating rate can be less than the discharge decrease rate; when the full power heating curve is full power heating curve 2, the estimated heating rate can be greater than the discharge decrease rate.

[0084] In this way, by determining the slope of the full-power heating curve as the estimated heating rate, the accuracy of the estimated heating rate can be guaranteed.

[0085] Therefore, in order to ensure the accuracy of the full-power heating curve, in some embodiments, obtaining the full-power heating curve may specifically include:

[0086] The system acquires ambient temperature, battery temperature, battery heat transfer coefficient, maximum battery heating power, battery thermal capacity, battery energy, and average power consumption. Average power consumption is the average power consumption excluding battery heating power during vehicle operation.

[0087] The battery heat dissipation power is expressed by ambient temperature, battery temperature, and battery heat transfer coefficient.

[0088] The rate of temperature rise is expressed by the battery's maximum heating power, battery heat dissipation power, and battery thermal capacity.

[0089] The rate of charge loss is expressed by the battery's maximum heating power, average power consumption, and battery energy.

[0090] A full-power heating curve is constructed based on the battery heat dissipation power, temperature rise rate, and charge drop rate.

[0091] Here, the battery heat dissipation power can be denoted as P. rad (T), the battery heat dissipation power is related to the temperature difference between the battery temperature and the ambient temperature. Based on this, the battery heat dissipation power can be expressed by the following formula (2):

[0092] P rad (T)=K rad ×(TT amb (2)

[0093] In addition, the rate of temperature rise can be denoted as: The rate of temperature rise can be expressed by the following formula (3):

[0094]

[0095] In formula (3), t can represent time.

[0096] Additionally, the rate of battery depletion can be denoted as: The power decrease rate can be expressed by the following formula (4):

[0097]

[0098] Solving the differential equations according to the above formulas (2)-(4) yields the curve function shown in formula (1), which is the full-power heating curve.

[0099] In the above formula (1), the value of C can be related to the end point of the vehicle's journey. The battery heating plan needs to ensure that the battery state remains below the power boundary curve until the end of the journey.

[0100] Therefore, in order to obtain a complete full-power heating curve, in some embodiments, the above-mentioned construction of the full-power heating curve based on the battery heat dissipation power, temperature rise rate, and charge decrease rate may specifically include:

[0101] An initial full-power heating curve is constructed based on the battery heat dissipation power, temperature rise rate, and charge drop rate.

[0102] Obtain the estimated remaining battery power when the vehicle reaches the end of its journey;

[0103] The estimated battery temperature is determined based on the first target discharge power and the estimated remaining charge. The first target discharge power is the discharge power that meets the basic power requirements of the vehicle and falls within the target power range.

[0104] Substitute the estimated remaining power and estimated battery temperature into the initial full-power heating curve to output the integral constant;

[0105] The full-power heating curve is determined based on the initial full-power heating curve and the integral constant.

[0106] Here, the integral constant in the initial full-power heating curve is unknown, while the integral constant in the full-power heating curve is known. Since the value of C can be related to the end point of the vehicle's journey, the complete full-power heating curve can be obtained by determining the specific value of C based on the end point of the journey and then substituting the specific value of C into the initial full-power heating curve.

[0107] As an example, if a user has set up navigation, the amount of electricity consumed by the vehicle from the start of the trip to the end can be estimated based on information such as navigation mileage, average vehicle speed, battery temperature, and average energy consumption. By calculating the difference between the battery level at the start of the trip and the amount consumed during the trip, the estimated remaining battery level at the end of the trip can be obtained.

[0108] If the user has not set up navigation, the lower limit of battery discharge (SOC) can be used as the estimated remaining battery power when the vehicle reaches the end of the journey.

[0109] After determining the estimated remaining battery capacity, the estimated battery temperature can be obtained by substituting the estimated remaining battery capacity into the power boundary curve. The specific value of the integration constant C can then be obtained by substituting the estimated remaining battery capacity and the estimated battery temperature into the initial full-power heating curve.

[0110] When the user has configured navigation, a schematic diagram of a full-power curve provided in this application embodiment can be shown as follows: Figure 4 As shown. In the absence of user-defined navigation, a schematic diagram of a full-power curve provided in this application embodiment can be shown as follows. Figure 5 As shown.

[0111] Furthermore, as mentioned above, if the estimated heating rate is less than or equal to the discharge rate, the battery can be heated according to its maximum heating power. However, if the battery is heated after the actual discharge power has entered the target power range, even heating at the battery's maximum heating power may not meet the vehicle's basic power requirements.

[0112] Therefore, in order to meet the basic power requirements of the vehicle, in some embodiments, when the estimated heating rate is less than or equal to the discharge rate of decrease, the battery can be heated in advance according to its maximum heating power. Based on this, the battery heating control method may further include:

[0113] If the estimated heating rate is less than or equal to the discharge rate, and the actual discharge power reaches the second target discharge power, the battery is heated according to the maximum heating power of the battery. The second target discharge power is the discharge power on the full power heating curve.

[0114] Here, when the actual discharge power of the battery decreases to the point where it intersects with the full-power heating curve, this intersection point is determined as the second target discharge power, and the battery is heated according to the maximum heating power of the battery (i.e., along the full-power heating curve). This can meet the basic power requirements of the vehicle when the estimated heating rate is less than or equal to the discharge rate.

[0115] This application provides a schematic diagram of heating a battery along a full-power heating curve, as shown in the embodiments below. Figure 6 As shown.

[0116] Furthermore, as mentioned above, heating the battery is not very meaningful if the vehicle's total range is short. For example, if the vehicle departs with a low battery temperature and high state of charge (SOC), the battery discharge power initially meets the power requirements. Without heating, the power output will be insufficient once the SOC decreases; however, if heating is used, the user may end the trip after a short drive, wasting the energy from battery heating. Therefore, it is crucial to rationally plan low-temperature battery heating to maximize pure electric range while ensuring power performance.

[0117] Therefore, in order to ensure the rationality of battery heating and reduce unnecessary energy consumption, in some embodiments, the above-mentioned S120 may specifically include:

[0118] When the estimated driving range of the vehicle is greater than the preset range and the actual discharge power is within the target power range, the battery temperature is controlled to remain within the target temperature range according to the closed-loop control strategy.

[0119] Here, the preset mileage can be a pre-set threshold for determining whether to heat the battery. Additionally, if the user has set up navigation, the vehicle's estimated mileage can be determined using the navigation mileage.

[0120] In this way, by heating the battery only when the vehicle's estimated mileage is relatively large, the rationality of battery heating can be ensured, and unnecessary energy consumption can be reduced.

[0121] Based on the battery heating control method provided in the above embodiments, this application also provides specific implementation methods of the battery heating control device. Please refer to the following embodiments.

[0122] like Figure 7 As shown, the battery heating control device 700 provided in this application embodiment includes the following modules:

[0123] The first acquisition module 710 is used to acquire the actual discharge power and target power range of the battery, wherein the target power range is the discharge power range that meets the basic power requirements of the vehicle.

[0124] The control module 720 is used to maintain the battery temperature within the target temperature range according to a closed-loop control strategy when the actual discharge power of the battery enters the target power range. The target temperature range is determined based on the target power range and the battery's charge level.

[0125] The battery heating control device 700 described above will be explained in detail below:

[0126] In some embodiments, the battery heating control device 700 may further include:

[0127] The second acquisition module is used to acquire the estimated heating rate and discharge rate of the battery before controlling the battery temperature to remain within the target temperature range according to the closed-loop control strategy when the actual discharge power enters the target power range.

[0128] Based on this, the control module 720 may specifically include:

[0129] The first control submodule is used to maintain the battery temperature within the target temperature range according to a closed-loop control strategy when the estimated heating rate is greater than the discharge decrease rate and the actual discharge power enters the target power range.

[0130] In some embodiments, the second acquisition module may specifically include:

[0131] The acquisition submodule is used to acquire the full-power heating curve. The full-power heating curve represents the relationship between battery capacity, battery temperature and battery discharge power when the battery is heated according to the maximum heating power of the corresponding battery.

[0132] The determination submodule is used to determine the slope of the full-power heating curve as the estimated heating rate.

[0133] In some embodiments, the acquisition submodule may specifically include:

[0134] The acquisition unit is used to acquire ambient temperature, battery temperature, battery heat transfer coefficient, battery maximum heating power, battery energy, battery thermal capacity and average power consumption. The average power consumption is the average power consumption during vehicle operation, excluding battery heating power.

[0135] The first representation unit is used to represent the battery heat dissipation power using ambient temperature, battery temperature and battery heat transfer coefficient;

[0136] The second representation unit is used to represent the rate of temperature rise using the battery's maximum heating power, battery heat dissipation power, and battery thermal capacity.

[0137] The third unit is used to represent the rate of charge depletion using the battery's maximum heating power, average power consumption, and battery energy.

[0138] The building unit is used to construct a full-power heating curve based on the battery heat dissipation power, temperature rise rate, and charge drop rate.

[0139] In some embodiments, the building unit may specifically include:

[0140] Construct sub-units to build initial full-power heating curves based on battery heat dissipation power, temperature rise rate, and charge drop rate;

[0141] The acquisition sub-unit is used to acquire the estimated remaining battery power when the vehicle reaches the end of its journey;

[0142] The first determining subunit is used to determine the estimated battery temperature based on the first target discharge power and the estimated remaining charge. The first target discharge power is the discharge power that meets the basic power requirements of the vehicle and falls within the target power range.

[0143] The calculation subunit is used to substitute the estimated remaining power and estimated battery temperature into the initial full-power heating curve and output the integral constant.

[0144] The second determining sub-unit is used to determine the full-power heating curve based on the initial full-power heating curve and the integral constant.

[0145] In some embodiments, the battery heating control device 700 may further include:

[0146] The heating module is used to heat the battery according to the battery's maximum heating power when the estimated heating rate is less than or equal to the discharge rate and the actual discharge power reaches the second target discharge power. The second target discharge power is the discharge power on the full power heating curve.

[0147] In some embodiments, the control module 720 may specifically include:

[0148] The second control submodule is used to maintain the battery temperature within the target temperature range according to a closed-loop control strategy when the estimated driving range of the vehicle is greater than the preset range and the actual discharge power is within the target power range.

[0149] In the battery heating control device of this application embodiment, since the target power range is the power range that meets the basic power requirements of the vehicle, and the target temperature range is determined based on the target power range and the battery charge, by controlling the battery temperature to remain within the target temperature range according to the closed-loop control strategy when the actual discharge power of the battery enters the target power range (i.e., the actual discharge power decreases to the maximum discharge power in the target power range), the actual discharge power can be kept stable within the target power range, thereby ensuring both the vehicle's power performance and the battery's range.

[0150] Based on the battery heating control method provided in the above embodiments, this application also provides a specific implementation method for a vehicle. The vehicle may include a processor and a memory storing computer program instructions; the processor executes the computer program instructions to implement the above-described battery heating control method.

[0151] As an example, a vehicle may include electronic devices, which may include the aforementioned processor and a memory storing computer program instructions.

[0152] Figure 8 A schematic diagram of an electronic device 800 provided in an embodiment of this application is shown.

[0153] Electronic device 800 may include processor 810 and memory 820 storing computer program instructions.

[0154] Specifically, the processor 810 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0155] Memory 820 may include mass storage for data or instructions. For example, and not limitingly, memory 820 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 820 may include removable or non-removable (or fixed) media. Where appropriate, memory 820 may be internal or external to electronic device 800. In a particular embodiment, memory 820 is a non-volatile solid-state memory.

[0156] Memory may include read-only memory (ROM), random access memory (RAM), disk storage media devices, optical storage media devices, flash memory devices, and electrical, optical, or other physical / tangible memory storage devices. Therefore, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to the first aspect of this application.

[0157] The processor 810 reads and executes computer program instructions stored in the memory 820 to implement any of the battery heating control methods in the above embodiments.

[0158] In one example, the electronic device 800 may also include a communication interface 830 and a bus 840. For example, Figure 8 As shown, the processor 810, memory 820, and communication interface 830 are connected through bus 840 and complete communication with each other.

[0159] The communication interface 830 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0160] Bus 840 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 840 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, this application contemplates any suitable bus or interconnect.

[0161] For example, the electronic device 800 can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc.

[0162] The electronic device can execute the battery heating control method in the embodiments of this application, thereby achieving the combination Figures 1 to 7 The battery heating control method and apparatus are described.

[0163] Furthermore, in conjunction with the battery heating control method in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the battery heating control methods in the above embodiments.

[0164] In conjunction with the battery heating control methods described in the above embodiments, this application can provide a computer program product to implement them. When the instructions in this computer program product are executed by the processor of an electronic device, they implement any of the battery heating control methods described in the above embodiments.

[0165] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0166] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0167] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0168] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0169] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A battery heating control method, characterized in that, include: The actual discharge power, target power range, estimated heating rate, and discharge decline rate of the battery are obtained, wherein the target power range is the discharge power range that meets the basic power requirements of the vehicle. When the actual discharge power enters the target power range, the battery temperature is controlled to be maintained within the target temperature range according to the closed-loop control strategy. The target temperature range is determined based on the target power range and the battery capacity. When the actual discharge power enters the target power range, controlling the battery temperature to remain within the target temperature range according to a closed-loop control strategy includes: When the estimated heating rate is greater than the discharge decrease rate and the actual discharge power enters the target power range, the battery temperature is controlled to remain within the target temperature range according to a closed-loop control strategy.

2. The method according to claim 1, characterized in that, The process of obtaining the estimated heating rate of the battery includes: Obtain the full-power heating curve, which represents the relationship between battery capacity, battery temperature and battery discharge power when the battery is heated according to the maximum heating power of the battery corresponding to the battery. The slope of the full-power heating curve is determined as the estimated heating rate.

3. The method according to claim 2, characterized in that, The process of obtaining the full-power heating curve includes: The system acquires ambient temperature, battery temperature, battery heat transfer coefficient, maximum battery heating power, battery energy, battery thermal capacity, and average power consumption. The average power consumption is the average power consumption excluding battery heating power during vehicle operation. The battery heat dissipation power is represented by the ambient temperature, the battery temperature, and the battery heat transfer coefficient. The rate of temperature rise is expressed by the battery's maximum heating power, the battery's heat dissipation power, and the battery's heat capacity. The rate of charge depletion is represented by the battery's maximum heating power, average power consumption, and battery energy. The full-power heating curve is constructed based on the battery heat dissipation power, the temperature rise rate, and the charge drop rate.

4. The method according to claim 3, characterized in that, The process of constructing the full-power heating curve based on the battery heat dissipation power, the temperature rise rate, and the charge drop rate includes: An initial full-power heating curve is constructed based on the battery heat dissipation power, the temperature rise rate, and the charge drop rate; Obtain the estimated remaining battery power when the vehicle reaches the end of its journey; The estimated battery temperature is determined based on the first target discharge power and the estimated remaining charge. The first target discharge power is the discharge power that meets the basic power requirements of the vehicle, and the first target discharge power falls within the target power range. Substitute the estimated remaining power and the estimated battery temperature into the initial full-power heating curve to output the integral constant; The full-power heating curve is determined based on the initial full-power heating curve and the integral constant.

5. The method according to any one of claims 2-4, characterized in that, The method further includes: When the estimated heating rate is less than or equal to the discharge decrease rate and the actual discharge power reaches the second target discharge power, the battery is heated according to the maximum heating power of the battery, and the second target discharge power is the discharge power on the full power heating curve.

6. The method according to claim 1, characterized in that, When the actual discharge power enters the target power range, controlling the battery temperature to remain within the target temperature range according to a closed-loop control strategy includes: If the estimated driving range of the vehicle is greater than the preset range, and the actual discharge power enters the target power range, the temperature of the battery is controlled to be maintained within the target temperature range according to the closed-loop control strategy.

7. A battery heating control device, characterized in that, The device includes: The first acquisition module is used to acquire the battery's actual discharge power, target power range, estimated heating rate, and discharge decrease rate, wherein the target power range is the discharge power range that meets the basic power requirements of the vehicle. The control module is used to maintain the temperature of the battery within the target temperature range according to a closed-loop control strategy when the actual discharge power of the battery enters the target power range. The target temperature range is determined based on the target power range and the battery's charge level. The control module is specifically used for: When the estimated heating rate is greater than the discharge decrease rate and the actual discharge power enters the target power range, the battery temperature is controlled to remain within the target temperature range according to a closed-loop control strategy.

8. A vehicle, characterized in that, The vehicle includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, it implements the battery heating control method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the battery heating control method as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device performs the battery heating control method as described in any one of claims 1-6.

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