Battery heating control method and apparatus, and vehicle

Abstract

A battery heating control method and apparatus, and a vehicle. The method comprises: acquiring actual discharge power and a target power range of a battery, wherein the target power range is a discharge power range that satisfies a basic power demand of a vehicle; and when the actual discharge power falls within the target power range, controlling, on the basis of a closed-loop control strategy, a temperature of the battery to be maintained within a target temperature range, wherein the target temperature range is determined on the basis of the target power range and the amount of electricity of the battery.

Description

Battery heating control method and device and vehicle

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411391555.3, filed on September 30, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of batteries, and particularly relates to a battery heating control method, device and vehicle. BACKGROUND

[0004] 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 order to ensure the power performance of the vehicle, the battery needs to be heated when the temperature of the battery is low. However, battery heating consumes a large amount of electricity, affecting the endurance of the battery. Therefore, it is crucial to ensure both the power performance of the vehicle and the endurance of the battery.

[0005] Therefore, there is an urgent need for a battery heating control method to ensure both the power performance of the vehicle and the endurance of the battery. SUMMARY

[0006] The embodiments of the present application provide a battery heating control method, device, vehicle, computer readable storage medium and computer program product, which can ensure both the power performance of the vehicle and the endurance of the battery.

[0007] In a first aspect, the embodiments of the present application provide a battery heating control method, which comprises:

[0008] obtaining an actual discharge power of the battery and a target power range, the target power range being a discharge power range meeting the basic power demand of the vehicle;

[0009] in a case where 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 amount of electricity of the battery.

[0010] In a possible implementation, before the temperature of the battery is controlled to be maintained in the target temperature range according to the closed-loop control strategy in the case where the actual discharge power enters the target power range, the method further comprises:

[0011] obtaining an estimated heating rate and a discharge drop rate of the battery;

[0012] In the case that the actual discharge power enters the target power range, the temperature of the battery is controlled to maintain in the target temperature range according to a closed-loop control strategy, including:

[0013] In the case that the estimated heating rate is greater than the discharge descending rate and the actual discharge power enters the target power range, the temperature of the battery is controlled to maintain in the target temperature range according to a closed-loop control strategy.

[0014] In a possible implementation, the estimated heating rate of the battery is obtained, including:

[0015] The full-power heating curve is obtained, and the full-power heating curve represents the corresponding relationship among the battery power, the battery temperature and the battery discharge power in the case that the battery is heated according to the battery maximum heating power corresponding to the battery;

[0016] The slope of the full-power heating curve is determined as the estimated heating rate.

[0017] In a possible implementation, the full-power heating curve is obtained, including:

[0018] The ambient temperature, the battery temperature, the battery heat transfer coefficient, the battery maximum heating power, the battery energy, the battery heat capacity and the average power consumption are obtained, and the average power consumption is the average power consumption except the battery heating power in the process of vehicle driving;

[0019] The battery heat dissipation power is represented by the ambient temperature, the battery temperature and the battery heat transfer coefficient;

[0020] The temperature rising rate is represented by the battery maximum heating power, the battery heat dissipation power and the battery heat capacity;

[0021] The power descending rate is represented by the battery maximum heating power, the average power consumption and the battery energy;

[0022] The full-power heating curve is constructed according to the battery heat dissipation power, the temperature rising rate and the power descending rate.

[0023] In a possible implementation, the full-power heating curve is constructed according to the battery heat dissipation power, the temperature rising rate and the power descending rate, including:

[0024] The initial full-power heating curve is constructed according to the battery heat dissipation power, the temperature rising rate and the power descending rate;

[0025] The estimated remaining power when the vehicle drives to the end of the journey is obtained;

[0026] The estimated battery temperature is determined according to the first target discharge power and the estimated remaining power, and the first target discharge power is a discharge power meeting the basic power demand of the vehicle, and the first target discharge power belongs to the target power range;

[0027] The estimated residual power and the estimated battery temperature are substituted into the initial full-power heating curve to output an integral constant;

[0028] The full-power heating curve is determined according to the initial full-power heating curve and the integral constant.

[0029] In a possible implementation, the method further includes:

[0030] 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, the battery is heated according to a maximum heating power of the battery, and the second target discharge power is a discharge power on the full-power heating curve.

[0031] In a possible implementation, in a case where the actual discharge power enters the target power range, the temperature of the battery is controlled to be maintained in the target temperature range according to a closed-loop control strategy, including:

[0032] In a case where the 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 the target temperature range according to the closed-loop control strategy.

[0033] In a second aspect, an embodiment of the present application provides a battery heating control device, which includes:

[0034] The first obtaining module is configured to obtain an actual discharge power of the battery and a target power range, and the target power range is a discharge power range meeting a basic power demand of the vehicle.

[0035] The control module is 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, and the target temperature range is determined according to the target power range and the power of the battery.

[0036] In a third aspect, an embodiment of the present application provides a vehicle, which includes a processor and a memory storing computer program instructions.

[0037] The processor implements the method in any possible implementation method of the first aspect when executing the computer program instructions.

[0038] 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.

[0039] 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.

[0040] 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

[0041] 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.

[0042] FIG. 1 is a flow diagram of a battery heating control method according to an embodiment of the present application;

[0043] FIG. 2 is a schematic diagram of a power boundary curve according to an embodiment of the present application;

[0044] FIG. 3 is a schematic diagram of a target power range according to an embodiment of the present application;

[0045] FIG. 4 is a schematic diagram of a full-power heating curve according to an embodiment of the present application;

[0046] FIG. 5 is another schematic diagram of a full-power heating curve according to an embodiment of the present application;

[0047] FIG. 6 is a schematic diagram of heating a battery along a full-power heating curve according to an embodiment of the present application;

[0048] FIG. 7 is a schematic diagram of a battery heating control device according to an embodiment of the present application;

[0049] FIG. 8 is a schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0050] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings. For the purpose of clarity, the description is divided into the following sections: technical field, background, summary, detailed description, and conclusions. It is understood that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. One skilled in the art can readily devise many alternative implementations without departing from the scope of the present application.

[0051] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0052] As described in the background section, in order to ensure the power performance of the vehicle, the battery needs to be heated when the battery temperature is low. However, the battery heating consumes a large amount of electric quantity, which affects the endurance of the battery. Therefore, it is crucial to ensure the power performance of the vehicle and the endurance of the battery.

[0053] At present, whether to heat the battery and the size of the heating power are usually determined according to the battery discharge power threshold or the battery temperature threshold. However, due to the uncertainty of the vehicle trip, the heating control strategy determined only according to the discharge power or the battery temperature often causes waste of battery energy, and therefore the battery heating strategy needs to be more reasonably planned.

[0054] It should be noted that the energy consumed by the battery heating is partly converted into the internal energy of the battery for heating, and the other part is dissipated due to the heat exchange between the battery and the environment. Therefore, in order to reduce the energy dissipation, the battery heating should be postponed as much as possible, and the battery temperature should be controlled to maintain at a lower temperature as much as possible under the condition of meeting the battery discharge power. In addition, if the total trip of the vehicle is small, it is not meaningful to heat the battery, and therefore the battery heating should also be postponed as much as possible from the perspective of the driver possibly ending the trip in advance.

[0055] To address the problems in the prior art, the embodiments of the present application provide a battery heating control method, device, vehicle, computer readable storage medium and computer program product.

[0056] The battery heating control method provided by the embodiments of the present application is first introduced below.

[0057] FIG. 1 shows a flowchart of the battery heating control method provided by the embodiments of the present application. As shown in FIG. 1, the battery heating control method provided by the embodiments of the present application includes the following steps:

[0058] S110, obtaining an actual discharge power of the battery and a target power range, the target power range being a discharge power range meeting a basic power demand of the vehicle;

[0059] S120, in a case where 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.

[0060] In the battery heating control method provided by the embodiments 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 a case where the actual discharge power 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 stabilized in the target power range, thereby the power performance of the vehicle and the endurance of the battery can be guaranteed at the same time.

[0061] The specific implementation of each step is introduced below.

[0062] 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 in the process of driving the vehicle. In addition, the target power range can be a power range determined according to a first target discharge power. The first target discharge power can be a discharge power meeting the basic power demand of the vehicle. The first target discharge power can be evaluated according to vehicle parameters such as the weight, speed, acceleration performance, etc. of the vehicle. The process of evaluating the first target discharge power according to the above vehicle parameters can refer to the related art, which is not described in detail here. After determining the first target discharge power, a fluctuation power is added to the first target discharge power by considering the fluctuation of the discharge power, and the target power range is obtained. The target power range can meet the basic power demand of the vehicle. For example, if the first target discharge power is 65kw and the fluctuation power is ±5kw, the target power range can be recorded as [60kw, 70kw].

[0063] On this basis, a schematic diagram of the power boundary curve provided by the embodiment of the present application can be shown in FIG. 2. In the diagram, the power boundary curve can be determined according to the first target discharge power. In addition, the table in FIG. 2 can be a discharge power map table. In the discharge power map table, the horizontal axis can be the battery power, i.e., the state of charge (SoC), the vertical axis can be the battery temperature T, and the numerical value in the unit cell can represent the battery discharge power within 10 seconds, i.e., 10s discharge. That is, the discharge power map table can represent the corresponding relationship among the battery power, the battery temperature, and the battery discharge power.

[0064] In FIG. 2, when the actual discharge power is below the power boundary curve, it indicates that the actual discharge power meets the basic power demand of the vehicle. When the actual discharge power is above the power boundary curve, it indicates that the actual discharge power does not meet the basic power demand of the vehicle.

[0065] In addition, a schematic diagram of the target power range provided by the embodiment of the present application can be shown in FIG. 3. In FIG. 3, the target power range can be determined by curve A and curve B. When the actual discharge power is below curve B, it indicates that the actual discharge power meets the basic power demand of the vehicle. When the actual discharge power is above curve A, it indicates that the actual discharge power does not meet the basic power demand of the vehicle. When the actual discharge power is between curve A and curve B, it indicates that the heating control strategy is being executed so that the actual discharge power can meet the basic power demand of the vehicle.

[0066] It should be noted that, as the battery power gradually decreases, the actual discharge power of the battery will gradually decrease. Before the actual discharge power decreases to the maximum discharge power in the target power range, it can be considered that the battery discharge power is in phase 1. If the actual discharge power decreases to the maximum discharge power in the target power range, it indicates that the actual discharge power is entering the target power range, and it can be considered that the battery discharge power is entering phase 2.

[0067] Therefore, as shown in FIG. 3, if the actual discharge power is in phase 1, it indicates that the actual discharge power meets the basic power demand of the vehicle and has a certain surplus, and the battery does not need to be heated. If the actual discharge power enters phase 2, it indicates that the actual discharge power just meets the basic power demand of the vehicle, and the battery needs to be heated in phase 2.

[0068] In some embodiments, in S120, in a case where the target power range and the battery power are determined, the target power range and the battery power are substituted into the discharging power map table, so that the target temperature range is determined. In addition, in a case where the first target discharging power and the battery power are determined, the first target discharging power and the battery power are substituted into the discharging power map table, so that the target temperature is determined.

[0069] As an example, if the actual discharging power decreases to the maximum discharging power in the target power range, that is, the actual discharging power intersects with the curve B shown in FIG. 3, it indicates that the actual discharging power is entering the target power range, so that the battery can be heated.

[0070] As a more specific example, by heating the battery according to a closed-loop control strategy with the target temperature as the target, the temperature of the battery can be maintained in the target temperature range. In the closed-loop control strategy, the temperature of the battery can be maintained in the target temperature range as the target, the heating power is calculated based on a Proportional-Integral-Derivative (PID) algorithm, and the battery is heated according to the heating power.

[0071] However, in actual situations, the thermal capacity of the battery is large. If the thermal capacity of the battery is large, the heating rate of the battery can not keep up with the discharging decrease rate of the battery. The discharging decrease rate can be related to the vehicle working condition such as vehicle speed, so it needs to be considered in different cases. If the heating rate is less than the discharging decrease rate, it can not be possible to heat the battery according to the closed-loop control strategy in stage 2.

[0072] 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 S120, it can also include:

[0073] Obtaining an estimated heating rate and a discharging decrease rate of the battery.

[0074] Based on this, the above S120 can specifically include:

[0075] In a case where the estimated heating rate is greater than the discharging decrease rate and the actual discharging power enters the target power range, the temperature of the battery is controlled to be maintained in the target temperature range according to the closed-loop control strategy.

[0076] Here, the estimated heating rate can be a possible heating rate of the battery before actual heating control. The discharging decrease rate can be the decrease rate of the SOC, can be the decrease rate of the discharging power, or can be a decrease rate determined according to the decrease rate of the SOC and the decrease rate of the discharging power, which is not limited here.

[0077] In addition, if the estimated heating rate is less than or equal to the discharge drop rate, the battery can be heated according to the maximum battery heating power corresponding to the battery.

[0078] Therefore, in order to ensure the accuracy of the estimated heating rate, in some embodiments, the above-mentioned obtaining the estimated heating rate of the battery can specifically include:

[0079] obtaining a full-power heating curve, the full-power heating curve representing a corresponding relationship among the battery power, the battery temperature and the battery discharge power when the battery is heated according to the maximum battery heating power corresponding to the battery;

[0080] determining the slope of the full-power heating curve as the estimated heating rate.

[0081] Here, the curve function corresponding to the full-power heating curve can be as shown in the following formula (1):

[0082] In formula (1), SOC can represent the battery power; T can represent the battery temperature; P heat may represent the maximum battery heating power; P drive may represent the average power consumption in the vehicle driving process except the battery heating power; K rad may represent the battery heat transfer coefficient; T amb may represent the ambient temperature; C bat may represent the battery heat capacity; E bat may represent the battery energy; and C can represent the integral constant.

[0083] In formula (1), the average power consumption can be determined according to the vehicle speed in the vehicle driving process, can be determined according to the historical average power consumption, or can be determined according to the average vehicle speed estimated in the navigation software, which is not limited here. In addition, the battery energy can be the product of the battery power and the voltage.

[0084] A schematic diagram of the full-power heating curve provided by the embodiments of the present application can be as shown in FIG. 4. In FIG. 4, if the slope of the power boundary curve is regarded as the discharge drop rate, when the full-power heating curve is full-power heating curve 1, the estimated heating rate can be less than the discharge drop rate; when the full-power heating curve is full-power heating curve 2, the estimated heating rate can be greater than the discharge drop rate.

[0085] 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 ensured.

[0086] Therefore, in order to ensure the accuracy of the full-power heating curve, in some embodiments, the above-mentioned obtaining the full-power heating curve can specifically include:

[0087] The ambient temperature, the battery temperature, the battery heat transfer coefficient, the battery maximum heating power, the battery heat capacity, the battery energy, and the average power consumption are obtained, and the average power consumption is the average power consumption other than the battery heating power during the vehicle driving process;

[0088] The battery heat dissipation power is expressed by the ambient temperature, the battery temperature, and the battery heat transfer coefficient;

[0089] The temperature rise rate is expressed by the battery maximum heating power, the battery heat dissipation power, and the battery heat capacity;

[0090] The power drop rate is expressed by the battery maximum heating power, the average power consumption, and the battery energy;

[0091] The full-power heating curve is constructed according to the battery heat dissipation power, the temperature rise rate, and the power drop rate.

[0092] Here, the battery heat dissipation power can be denoted as P rad (T), and 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):

[0093] P rad (T)=K rad ×(T-T amb ) (2)

[0094] In addition, the temperature rise rate can be denoted as The temperature rise rate can be expressed by the following formula (3):

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

[0096] In addition, the power drop rate can be denoted as The power drop rate can be expressed by the following formula (4):

[0097] According to the above formulas (2)-(4), the differential equation is solved, and the curve function as shown in formula (1), i.e., the full-power heating curve, is obtained.

[0098] In the above formula (1), the value of C can be related to the end of the vehicle trip. The planning of battery heating needs to ensure that the battery state is always below the power boundary curve before the end of the trip.

[0099] Based on this, in order to obtain a complete full-power heating curve, in some embodiments, the above construction of the full-power heating curve according to the battery heat dissipation power, the temperature rise rate, and the power drop rate can specifically include:

[0100] constructing an initial full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the power drop rate;

[0101] obtaining an estimated residual power when the vehicle travels to the end of the trip;

[0102] determining an estimated battery temperature according to the first target discharge power and the estimated residual power, the first target discharge power being a discharge power meeting the basic power demand of the vehicle, and the first target discharge power belonging to the target power range;

[0103] substituting the estimated residual power and the estimated battery temperature into the initial full-power heating curve to output an integral constant;

[0104] determining the full-power heating curve according to the initial full-power heating curve and the integral constant.

[0105] Here, the integral constant in the initial full-power heating curve is unknown, and the integral constant in the full-power heating curve is known. Since the value of C can be related to the end of the trip of the vehicle, by determining the specific value of C according to the end of the trip, and then substituting the specific value of C into the initial full-power heating curve, a complete full-power heating curve can be obtained.

[0106] As an example, if the user sets a navigation, the consumed power of the vehicle from the start of the trip to the end of the trip can be estimated according to the navigation mileage, the average vehicle speed, the battery temperature, the average energy consumption and other information. By calculating the difference between the power at the start of the trip and the consumed power during the trip, the estimated residual power of the vehicle when traveling to the end of the trip can be obtained.

[0107] If the user does not set a navigation, the lower limit SOC of the battery discharge can be used as the estimated residual power of the vehicle when traveling to the end of the trip.

[0108] After determining the estimated residual power, the estimated battery temperature can be obtained by substituting the estimated residual power into the power boundary curve. The specific value of the integral constant C can be obtained by substituting the estimated residual power and the estimated battery temperature into the initial full-power heating curve.

[0109] In the case where the user sets a navigation, a schematic diagram of the full-power curve provided by the embodiments of the present application can be as shown in FIG. 4. In the case where the user does not set a navigation, another schematic diagram of the full-power curve provided by the embodiments of the present application can be as shown in FIG. 5.

[0110] In addition, as described above, if the estimated heating rate is less than or equal to the discharge reduction rate, the battery can be heated according to the battery maximum heating power corresponding to the battery. However, if the battery is heated again when the actual discharge power enters the target power range, even if the battery is heated according to the battery maximum heating power, the basic power demand of the vehicle may not be met.

[0111] Therefore, in order to meet the basic power demand of the vehicle, in some embodiments, in the case where the estimated heating rate is less than or equal to the discharge reduction rate, heating according to the battery maximum heating power can be performed in advance. Based on this, the battery heating control method can further include:

[0112] In the case where the estimated heating rate is less than or equal to the discharge reduction rate and the actual discharge power reaches the second target discharge power, the battery is heated according to the battery maximum heating power, and the second target discharge power is the discharge power on the full power heating curve.

[0113] Here, when the actual discharge power of the battery decreases to a point of intersection with the full power heating curve, the point of intersection is determined as the second target discharge power, and heating of the battery according to the battery maximum heating power (i.e., along the full power heating curve) is started, which can meet the basic power demand of the vehicle in the case where the estimated heating rate is less than or equal to the discharge reduction rate.

[0114] An illustrative diagram of heating the battery along the full power heating curve provided by the embodiments of the present application can be as shown in FIG. 6.

[0115] In addition, as described above, if the total trip of the vehicle is small, heating the battery is not meaningful. For example, the vehicle starts at a low temperature of the battery and a high SOC, and the discharge power of the battery meets the power demand at the start. If not heated, the power cannot meet the demand after the SOC decreases; but if heated, the user may end the trip after a short drive, and the energy of the battery heating is wasted. Therefore, how to reasonably plan the heating of the low-temperature battery is crucial to maximize the pure electric range on the premise of guaranteeing the power.

[0116] Therefore, in order to ensure the rationality of battery heating and reduce unnecessary energy consumption, in some embodiments, S120 can specifically include:

[0117] In the case where 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 in the target temperature range according to the closed-loop control strategy.

[0118] Here, the preset range can be a critical value for determining whether to heat the battery. In addition, if the user sets a navigation, the estimated driving range of the vehicle can be determined by the navigation range.

[0119] In this way, by heating the battery only when the estimated driving range of the vehicle is large, the rationality of battery heating can be ensured, and unnecessary energy consumption can be reduced.

[0120] Based on the battery heating control method provided in the above embodiments, the application also provides a specific implementation of a battery heating control device. Please refer to the following embodiments.

[0121] As shown in FIG. 7, the battery heating control device 700 provided by the embodiments of the application includes the following modules:

[0122] The first obtaining module 710 is configured to obtain the actual discharge power of the battery and a target power range, the target power range being a discharge power range meeting the basic power demand of the vehicle;

[0123] The control module 720 is configured to, in the case that 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.

[0124] The battery heating control device 700 is described in detail as follows:

[0125] In some embodiments, the battery heating control device 700 can further include:

[0126] The second obtaining module is configured to, before the temperature of the battery is controlled 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, obtain an estimated heating rate and a discharge drop rate of the battery.

[0127] Based on this, the control module 720 can specifically include:

[0128] The first control submodule is configured to, in the case that the estimated heating rate is greater than the discharge drop rate and the actual discharge power enters the target power range, control the temperature of the battery to be maintained in the target temperature range according to the closed-loop control strategy.

[0129] In some embodiments, the second obtaining module can specifically include:

[0130] The obtaining submodule is configured to obtain a full-power heating curve, the full-power heating curve representing the corresponding relationship among the power of the battery, the temperature of the battery and the discharge power of the battery in the case that the battery is heated according to the corresponding maximum heating power of the battery;

[0131] The determining submodule is configured to determine the slope of the full-power heating curve as the estimated heating rate.

[0132] In some embodiments, the obtaining sub-module can specifically include:

[0133] The obtaining unit is configured to obtain the ambient temperature, the battery temperature, the battery heat transfer coefficient, the battery maximum heating power, the battery energy, the battery heat capacity, and the average power consumption, the average power consumption being an average power consumption other than the battery heating power during vehicle driving;

[0134] The first indicating unit is configured to indicate the battery heat dissipation power by using the ambient temperature, the battery temperature, and the battery heat transfer coefficient;

[0135] The second indicating unit is configured to indicate the temperature rise rate by using the battery maximum heating power, the battery heat dissipation power, and the battery heat capacity;

[0136] The third indicating unit is configured to indicate the power drop rate by using the battery maximum heating power, the average power consumption, and the battery energy;

[0137] The constructing unit is configured to construct the full-power heating curve according to the battery heat dissipation power, the temperature rise rate, and the power drop rate.

[0138] In some embodiments, the constructing unit can specifically include:

[0139] The constructing sub-unit is configured to construct an initial full-power heating curve according to the battery heat dissipation power, the temperature rise rate, and the power drop rate;

[0140] The obtaining sub-unit is configured to obtain an estimated remaining power when the vehicle drives to the end of the trip;

[0141] The first determining sub-unit is configured to determine an estimated battery temperature according to the first target discharge power and the estimated remaining power, the first target discharge power being a discharge power meeting the basic power demand of the vehicle, and the first target discharge power belonging to the target power range;

[0142] The calculating sub-unit is configured to substitute the estimated remaining power and the estimated battery temperature into the initial full-power heating curve to output an integral constant;

[0143] The second determining sub-unit is configured to determine the full-power heating curve according to the initial full-power heating curve and the integral constant.

[0144] In some embodiments, the battery heating control device 700 can further include:

[0145] The heating module is configured to heat the battery according to the battery maximum heating power in a case where the estimated heating rate is less than or equal to the discharge drop rate, and the actual discharge power reaches the second target discharge power, the second target discharge power being a discharge power on the full-power heating curve.

[0146] In some embodiments, the control module 720 can specifically include:

[0147] The second control submodule is configured to, in a case where the estimated driving range of the vehicle is greater than the preset range and the actual discharge power enters the target power range, control the temperature of the battery to be maintained in the target temperature range according to a closed-loop control strategy.

[0148] In the battery heating control device provided in the embodiments of the present application, since the target power range is a power range meeting the basic power requirement 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 a closed-loop control strategy in a case where 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 stabilized in the target power range, thereby guaranteeing the power performance of the vehicle and the endurance capability of the battery at the same time.

[0149] Based on the battery heating control method provided in the above embodiments, the embodiments of the present application further provide a specific implementation of a vehicle. The vehicle can include a processor and a memory storing computer program instructions; and the processor implements the above battery heating control method when executing the computer program instructions.

[0150] As an example, the vehicle can include an electronic device, and the electronic device can include the above processor and the memory storing computer program instructions.

[0151] FIG. 8 shows a schematic diagram of an electronic device provided in the embodiments of the present application.

[0152] The electronic device 800 can include a processor 810 and a memory 820 storing computer program instructions.

[0153] Specifically, the above processor 810 can include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or can be configured to implement one or more integrated circuits of the embodiments of the present application.

[0154] The memory 820 can include mass storage for data or instructions. As an example and not by way of limitation, the memory 820 can include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disc (e.g., a compact disc (CD) or a digital versatile disc (DVD)), a solid-state drive (SSD), a USB drive, or a combination of two or more of these. Where appropriate, the memory 820 can include removable or non-removable (or fixed) media, where appropriate. The memory 820 can be internal or external to the electronic device 800, as appropriate. In particular embodiments, the memory 820 is non-volatile, solid-state memory.

[0155] The memory can include read-only memory (ROM), random-access memory (RAM), magnetic disk storage mediums, optical storage mediums, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software that, when executed (by one or more processors), is operable to access the operations described with reference to the methods according to the first aspect of the application.

[0156] The processor 810 implements any of the battery heating control methods described in the above embodiments by reading and executing computer program instructions stored in the memory 820.

[0157] In one example, the electronic device 800 can further include a communication interface 830 and a bus 840. As shown in FIG. 8, the processor 810, the memory 820, and the communication interface 830 are connected through the bus 840 and complete communication among each other.

[0158] The communication interface 830 is mainly used to realize the communication between the modules, devices, units and / or equipment in the embodiments of the application.

[0159] Bus 840 includes hardware, software, or both, to couple components of electronic device 800 to each other and to couple components of electronic device 800 to other devices. For example, but not limited to, bus can include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand (IB) interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel 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 another suitable bus or a combination of two or more of these. Where appropriate, bus 840 can include one or more buses. Although this application describes and shows a particular bus, this application contemplates any suitable bus or interconnect.

[0160] For example, electronic device 800 can be a phone, a tablet, a laptop, a palmtop, an in-vehicle electronic device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc.

[0161] The electronic device can execute the battery heating control method in the embodiments of the present application, thereby implementing the battery heating control method and apparatus described in combination with FIGS. 1 to 7.

[0162] In addition, in combination with the battery heating control method in the above embodiments, the embodiments of the present application can provide a computer-readable storage medium to implement. The computer-readable storage medium has computer program instructions stored thereon; the computer program instructions are executed by a processor to implement any one of the battery heating control methods in the above embodiments. Examples of the computer-readable storage medium include a non-transitory computer-readable storage medium, such as a read-only memory.

[0163] In combination with the battery heating control method in the above embodiments, the embodiments of the present application can provide a computer program product to implement. The instructions in the computer program product are executed by the processor of the electronic device to implement any one of the battery heating control methods in the above embodiments.

[0164] It is to be understood that the application is not limited to particular configurations and processes described herein and shown in the drawings. The detailed description is not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims. In the above embodiments, several specific steps are described and illustrated in order to provide a thorough understanding of the present application. However, the process of the present application can be carried out in some orders of the steps, under some conditions, and using some alternatives, all without departing from the spirit and scope of the application.

[0165] The functions of the various elements shown in the figures can be provided through the use of dedicated hardware as well as hardware capable of executing software. When provided by a processor, the functions can be provided by a software program tangibly embodied on a machine-readable medium (for example, a non-transitory machine-readable medium). The software program can be run by a processor to perform the functions of the application. A machine-readable medium includes any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computer). For example, a machine-readable medium includes a machine-readable storage medium (for example, ROM, RAM, a magnetic or optical disk, a flash memory, etc.) and a machine-readable transmission medium (for example, a magnetic or optical carrier wave). The software program can be implemented in a high level procedural or object-oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. The software program can be transmitted to a computer using a data signal on a carrier wave by a transmission medium (for example, a fiber optic cable, a carrier wave, etc.). It will be appreciated that a "storage medium" can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a "computer-readable medium". For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu-Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0166] In the above embodiments, a number of examples are described and illustrated in order to provide a thorough understanding of the present application. However, the application is not limited to the examples described and illustrated, and the examples are not to be interpreted as limiting the scope of the application. The examples are provided to illustrate the present application and to assist in understanding the scope of the application.

[0167] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. Alternatively, computer program implemented steps can be

[0168] The above merely describes a specific implementation of the present application. Those skilled in the art can clearly understand the specific working processes of the system, modules and units described above for the convenience and brevity of description, and the corresponding processes in the foregoing method embodiments can be referred to, which will not be described herein again. It should be understood that the protection scope of the present application is not limited in this way, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. A battery heating control method, comprising: obtaining an actual discharge power of a battery and a target power range, the target power range being a discharge power range satisfying a basic power demand of a vehicle; in a case where the actual discharge power enters the target power range, controlling a 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 a state of charge of the battery. 2.The method of claim 1, wherein, 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 where the actual discharge power enters the target power range, the method further comprises: obtaining an estimated heating rate and a discharge decreasing rate of the battery; 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 where the actual discharge power enters the target power range comprises: in a case where the estimated heating rate is greater than the discharge decreasing rate and the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained in the target temperature range according to the closed-loop control strategy.

3. The method of claim 2, wherein, the obtaining the estimated heating rate comprises: obtaining a full-power heating curve, the full-power heating curve representing a corresponding relationship among a state of charge, a battery temperature and a battery discharge power in a case where the battery is heated according to a battery maximum heating power corresponding to the battery; determining a slope of the full-power heating curve as the estimated heating rate.

4. The method of claim 3, wherein, the obtaining the full-power heating curve comprises: 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 other than a battery heating power in a process of driving the vehicle; representing a battery heat dissipation power by using the ambient temperature, the battery temperature and the battery heat transfer coefficient; representing a temperature rising rate by using the battery maximum heating power, the battery heat dissipation power and the battery heat capacity; representing a state of charge decreasing rate by using the battery maximum heating power, the average power consumption and the battery energy; constructing the full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the state of charge decreasing rate.

5. The method of claim 4, wherein, the constructing the full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the state of charge decreasing rate comprises: constructing an initial full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the state of charge decreasing rate; obtaining an estimated remaining state of charge when the vehicle drives to an end of a trip; determining an estimated battery temperature according to a first target discharge power and the estimated remaining state of charge, the first target discharge power being a discharge power satisfying a basic power demand of the vehicle, the first target discharge power belonging to the target power range; substituting the estimated remaining state of charge and the estimated battery temperature into the initial full-power heating curve to output an integral constant; determining the full-power heating curve according to the initial full-power heating curve and the integral constant.

6. The method of any one of claims 3-5, further comprising: heating the battery at the maximum heating power of the battery in a case that the estimated heating rate is less than or equal to the discharge decreasing rate and the actual discharge power reaches a second target discharge power, the second target discharge power being a discharge power on the full power heating curve.

7. The method of claim 1 or 2, wherein, controlling the temperature of the battery to maintain in a target temperature range according to a closed loop control strategy in a case that the actual discharge power enters the target power range, comprises: controlling the temperature of the battery to maintain in a target temperature range according to a closed loop control strategy in a case that the estimated driving range of the vehicle is greater than a preset range and the actual discharge power enters the target power range.

8. A battery heating control device, the device comprising: 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; a control module configured to control the temperature of the battery to maintain in a target temperature range according to a closed loop control strategy in a case that the actual discharge power of the battery enters the target power range, the target temperature range being determined according to the target power range and a state of charge of the battery.

9. A vehicle comprising: a processor and a memory having computer program instructions stored therein; the processor implements the battery heating control method of any one of claims 1-7 when executing the computer program instructions.

10. A computer readable storage medium having computer program instructions stored thereon, the computer program instructions being executed by a processor to implement the battery heating control method of any one of claims 1-7.

11. 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 battery heating control method of any one of claims 1-7.

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