Battery heating control method and device and vehicle

Abstract

The invention discloses a battery heating control method and device and a vehicle. The method comprises the steps that the actual discharge power and the target power range of a battery are obtained, and the target power range is the discharge power range meeting the basic power requirement of a vehicle; and under the condition that the actual discharge power enters the target power range, the temperature of the battery is controlled to be maintained within a target temperature range according to a closed-loop control strategy, and the target temperature range is determined and obtained according to the target power range and the electric quantity of the battery. According to the battery heating control method, the power performance of the vehicle and the cruising ability of the battery can be guaranteed at the same time.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular, relates to a battery heating control method, device and vehicle. Background Art

[0002] With the development of vehicle technology, more and more vehicles use batteries as a power source. The discharge capacity of the battery is greatly affected by the battery temperature. When the battery temperature is low, the discharge capacity of the battery is weak. Therefore, when the battery temperature is low, in order to ensure the power performance of the vehicle, it is often necessary to heat the battery. However, battery heating consumes a lot of electricity and affects the battery's endurance. Therefore, how to ensure both the vehicle's power performance and the battery's endurance is crucial.

[0003] Therefore, there is an urgent need for a battery heating control method to ensure both the vehicle's power performance and the battery's endurance. Summary of the invention

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

[0005] In a first aspect, an embodiment of the present application provides a battery heating control method, the method comprising:

[0006] Obtaining an actual discharge power and a target power range of the battery, wherein the target power range is a discharge power range that meets the basic power requirements of the vehicle;

[0007] When 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 a closed-loop control strategy, and the target temperature range is determined according to the target power range and the power level of the battery.

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

[0009] Obtaining an estimated heating rate and a discharge decrease rate of the battery;

[0010] When the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained within the target temperature range according to a closed-loop control strategy includes:

[0011] When the estimated heating rate is greater than the discharge decrease rate 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 a closed-loop control strategy.

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

[0013] Acquire a full-power heating curve, where the full-power heating curve represents a corresponding relationship between battery power, battery temperature, and battery discharge power when the battery is heated according to a battery maximum heating power corresponding to the battery;

[0014] The slope of the full power heating curve is determined as the estimated heating rate.

[0015] In a possible implementation, obtaining a full-power heating curve includes:

[0016] Acquire the ambient temperature, battery temperature, battery heat transfer coefficient, battery maximum heating power, battery energy, battery heat capacity and average power consumption, wherein the average power consumption is the average power consumption excluding the battery heating power during the driving of the vehicle;

[0017] The battery heat dissipation power is expressed by the ambient temperature, the battery temperature and the battery heat transfer coefficient;

[0018] The temperature rise rate is expressed by the maximum heating power of the battery, the heat dissipation power of the battery and the heat capacity of the battery;

[0019] The rate of power reduction is represented by the maximum heating power of the battery, the average power consumption and the battery energy;

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

[0021] In a possible implementation, constructing the full-power heating curve according to the battery heat dissipation power, the temperature rise rate, and the power decrease rate includes:

[0022] Constructing an initial full-power heating curve according to the battery heat dissipation power, the temperature rise rate and the power decrease rate;

[0023] Obtain the estimated remaining power of the vehicle when it reaches the end of the journey;

[0024] determining an estimated battery temperature according to a first target discharge power and the estimated remaining power, wherein the first target discharge power is a discharge power that meets a basic power requirement of the vehicle and the first target discharge power belongs to the target power range;

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

[0026] The full power heating curve is determined according to the initial full power heating curve and the integration constant.

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

[0028] When the estimated heating rate is less than or equal to the discharge decrease rate and the actual discharge power reaches a 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.

[0029] In a possible implementation, when the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained within the target temperature range according to a closed-loop control strategy includes:

[0030] When the estimated mileage of the vehicle is greater than the preset mileage 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 a closed-loop control strategy.

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

[0032] A first acquisition module is used to acquire the actual discharge power and target power range of the battery, wherein the target power range is a discharge power range that meets the basic power requirements of the vehicle;

[0033] The control module is used to control the temperature of the battery to be maintained 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 according to the target power range and the power level of the battery.

[0034] In a third aspect, an embodiment of the present application provides a vehicle, the vehicle comprising: a processor and a memory storing computer program instructions;

[0035] When the processor executes the computer program instructions, the processor implements any possible implementation method of the first aspect described above.

[0036] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implements a method in any possible implementation method of the first aspect described above.

[0037] In a fifth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes a method as any possible implementation method in the first aspect above.

[0038] In the embodiment of the present application, since the target power range is a 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 power, therefore, by controlling the battery temperature to be maintained 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 (that is, the actual discharge power is reduced to the maximum discharge power in the target power range), the actual discharge power can be ensured to be stable within the target power range, thereby ensuring both the vehicle's power performance and the battery's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

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

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

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

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

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

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

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

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

[0048] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0050] As mentioned in the background technology section, when the battery temperature is low, in order to ensure the power performance of the vehicle, it is often necessary to heat the battery. However, battery heating consumes a lot of electricity and affects the battery's endurance. Therefore, it is crucial to ensure both the vehicle's power performance and the battery's endurance.

[0051] At present, it is usually determined whether to heat the battery and the size of the heating power based on the battery discharge power threshold or battery temperature threshold. However, due to the uncertainty of vehicle range, determining the heating control strategy based only on discharge power or battery temperature often results in a waste of battery energy, so a more reasonable battery heating strategy needs to be planned.

[0052] It should be noted that part of the energy consumed by battery heating can be converted into the internal energy of the battery for heating, and the other part will be dissipated due to the heat exchange between the battery and the environment. Therefore, in order to reduce energy dissipation, battery heating should be postponed as much as possible, and the battery temperature should be kept at a low temperature as much as possible while meeting the battery discharge power. In addition, if the total range of the vehicle is short, it is not meaningful to heat the battery. Therefore, from the perspective that the driver may end the journey early, battery heating should also be postponed as much as possible.

[0053] Based on this, in order to solve the problems of 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.

[0054] The following first introduces the battery heating control method provided in the embodiment of the present application.

[0055] Figure 1 FIG. 1 is a flow chart of a battery heating control method provided in an embodiment of the present application. Figure 1 As shown, the battery heating control method provided in the embodiment of the present application includes the following steps:

[0056] S110, obtaining an actual discharge power and a target power range of the battery, where the target power range is a 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 temperature of the battery is controlled to be maintained within the target temperature range according to a closed-loop control strategy. The target temperature range is determined according to the target power range and the battery power.

[0058] In the battery heating control method of the embodiment of the present application, since the target power range is a 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 power, therefore, by controlling the battery temperature to be maintained 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 (that is, the actual discharge power is reduced to the maximum discharge power in the target power range), the actual discharge power can be stabilized within the target power range, thereby ensuring both the vehicle's power performance and the battery's endurance.

[0059] The specific implementation methods of the above steps are introduced 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 the driving of the vehicle. In addition, the target power range can be a power range determined according to the first target discharge power. Among them, 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 obtained by evaluating vehicle parameters such as the weight, speed, and acceleration performance of the vehicle. The process of evaluating the first target discharge power according to the above-mentioned vehicle parameters can refer to the prior art and will not be described in detail here. After determining the first target discharge power, by considering the fluctuation of the discharge power, the fluctuating 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 65kw and the fluctuating power is ±5kw, the target power range can be recorded as [60kw, 70kw].

[0061] On this basis, a schematic diagram of a power boundary curve provided in an embodiment of the present application can be as follows: Figure 2 As shown. Among them, the power boundary curve can be determined based on the first target discharge power. In addition, Figure 2 The table in may be a discharge power map. In the discharge power map, the horizontal axis may be the battery power, i.e., the battery state of charge (SoC), the vertical axis may be the battery temperature, and the value in the cell may represent the battery discharge power. That is, the discharge power map may represent the corresponding relationship between the battery power, the battery temperature, and the battery discharge power.

[0062] exist Figure 2 When the actual discharge power is below the power boundary curve, it means 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 means that the actual discharge power does not meet the basic power demand of the vehicle.

[0063] In addition, a schematic diagram of a target power range provided in an embodiment of the present application can be as follows: Figure 3 As shown. Figure 3 In the example, the target power range can be determined by curve A and curve B. When the actual discharge power is below curve B, it means that the actual discharge power meets the basic power demand of the vehicle. When the actual discharge power is above curve A, it means 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 means that the heating control strategy is being executed so that the actual discharge power can meet the basic power demand of the vehicle.

[0064] 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 stage 1. If the actual discharge power decreases to the maximum discharge power in the target power range, it means that the actual discharge power is entering the target power range, and it can be considered that the battery discharge power is entering stage 2.

[0065] Therefore, if Figure 3 As shown in the figure, if the actual discharge power is in stage 1, it means that the actual discharge power meets the basic power demand of the vehicle and has a certain surplus, and 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 demand of the vehicle, and the battery needs to be heated in stage 2.

[0066] In some embodiments, in S120, when the target power range and the battery power are determined, the target power range and the battery power are substituted into the discharge power map table to determine the target temperature range. In addition, when the first target discharge power and the battery power are determined, the first target discharge power and the battery power are substituted into the discharge power map table to determine the target temperature.

[0067] As an example, if the actual discharge power is reduced to the maximum discharge power in the target power range, that is, the actual discharge power is Figure 3 The intersection of the curve B shown indicates that the actual discharge power is entering the target power range, so that the battery can begin to be heated.

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

[0069] However, in actual situations, the thermal capacity of the battery is relatively large. If the thermal capacity of the battery is relatively large, the heating rate of the battery may not keep up with the discharge decrease rate of the battery. Among them, the discharge decrease rate may be related to vehicle operating conditions such as vehicle speed, so it needs to be considered on a case-by-case basis. If the heating rate is less than the discharge decrease 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 S120, the following steps may also be included:

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

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

[0073] 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 be maintained within the target temperature range according to the closed-loop control strategy.

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

[0075] In addition, if the estimated heating rate is less than or equal to the discharge decrease rate, the battery may be heated according to the maximum heating power of the battery corresponding to the battery.

[0076] Based on this, in order to ensure the accuracy of the estimated heating rate, in some embodiments, the above-mentioned obtaining of the estimated heating rate of the battery may specifically include:

[0077] Obtaining a full-power heating curve, where the full-power heating curve represents a corresponding relationship between the battery power, the battery temperature, and the battery discharge power when the battery is heated according to the battery maximum heating power corresponding to the battery;

[0078] The slope of the full power heating curve was determined as the estimated heating rate.

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

[0080]

[0081] In formula (1), SOC can represent the battery charge; T can represent the battery temperature; P heat It can represent the maximum heating power of the battery; P drive It can represent the average power consumption of the vehicle during driving, excluding the battery heating power; K rad Can represent the battery heat transfer coefficient; T amb Can indicate ambient temperature; C bat Can represent the thermal capacity of the battery; E bat Can represent battery energy; C can represent the integration constant.

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

[0083] A schematic diagram of a full-power heating curve provided in an embodiment of the present application can be shown as follows: Figure 4 As shown. Figure 4 In the figure, if the slope of the power boundary curve is regarded as the discharge decrease rate, when the full-power heating curve is the full-power heating curve 1, the estimated heating rate can be less than the discharge decrease rate; when the full-power heating curve is the 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 ensured.

[0085] Based on this, in order to ensure the accuracy of the full-power heating curve, in some embodiments, the above-mentioned acquisition of the full-power heating curve may specifically include:

[0086] Obtain the ambient temperature, battery temperature, battery heat transfer coefficient, battery maximum heating power, battery heat capacity, battery energy and average power consumption. The average power consumption is the average power consumption excluding the battery heating power during vehicle driving.

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

[0088] The temperature rise rate is expressed by the battery maximum heating power, battery heat dissipation power and battery heat capacity;

[0089] The rate of power reduction is expressed by the maximum heating power of the battery, the average power consumption and the battery energy;

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

[0091] Here, the battery heat dissipation power can be recorded 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 temperature rise rate can be expressed as The temperature rise rate can be expressed by the following formula (3):

[0094]

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

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

[0097]

[0098] By solving the differential equations according to the above formulas (2)-(4), the curve function shown in formula (1) can be obtained, that is, the full-power heating curve.

[0099] In the above formula (1), the value of C may be related to the end of the vehicle's journey. The planning of battery heating needs to ensure that the battery state is always below the power boundary curve before the end of the journey.

[0100] Based on this, in order to obtain a complete full-power heating curve, in some embodiments, the full-power heating curve is constructed according to the battery heat dissipation power, temperature rise rate and power decrease rate, which may specifically include:

[0101] Construct an initial full-power heating curve based on the battery heat dissipation power, temperature rise rate, and power drop rate;

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

[0103] determining an estimated battery temperature according to a first target discharge power and an estimated remaining power, wherein the first target discharge power is a discharge power that meets a basic power requirement of the vehicle and the first target discharge power belongs to a target power range;

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

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

[0106] 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 vehicle's journey, by determining the specific value of C according to the end of the journey, and then substituting the specific value of C into the initial full-power heating curve, a complete full-power heating curve can be obtained.

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

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

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

[0110] In the case where the user sets navigation, a schematic diagram of a full power curve provided in an embodiment of the present application can be as follows: Figure 4 When the user does not set navigation, a schematic diagram of a full power curve provided in an embodiment of the present application can be as shown in FIG. Figure 5 shown.

[0111] In addition, as mentioned above, if the estimated heating rate is less than or equal to the discharge drop rate, the battery can be heated according to the battery's corresponding maximum heating power. However, if the battery is heated when the actual discharge power enters the target power range, even if it is heated according to the battery's maximum heating power, it may not meet the vehicle's basic power requirements.

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

[0113] 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. 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 is reduced to an intersection with the full-power heating curve, the intersection 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), which can meet the basic power requirements of the vehicle when the estimated heating rate is less than or equal to the discharge decrease rate.

[0115] A schematic diagram of heating a battery along a full-power heating curve provided in an embodiment of the present application can be as follows: Figure 6 shown.

[0116] In addition, as mentioned above, if the total range of the vehicle is small, it is not meaningful to heat the battery. For example, the vehicle starts when the battery is low in temperature and high in SOC, and the battery discharge power meets the power requirements when it just starts. If it is not heated, the power will not be able to meet the demand after the SOC is reduced; but if it is heated, the user may end the journey after a short drive, and the energy of battery heating will be wasted. Therefore, it is crucial to reasonably plan the heating of low-temperature batteries and maximize the pure electric mileage while ensuring power.

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

[0118] When the vehicle's estimated mileage is greater than the preset mileage and the actual discharge power is within the target power range, the battery temperature is controlled to be maintained within the target temperature range according to the closed-loop control strategy.

[0119] Here, the preset mileage may be a pre-set critical value for determining whether to heat the battery. In addition, if the user sets navigation, the estimated mileage of the vehicle may be determined by the navigation mileage.

[0120] In this way, by heating the battery only when the vehicle's estimated mileage is 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 embodiment, the present application also provides a specific implementation of a battery heating control device. Please refer to the following embodiment.

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

[0123] A first acquisition module 710 is used to acquire the actual discharge power and target power range of the battery, where the target power range is a discharge power range that meets the basic power requirements of the vehicle;

[0124] The control module 720 is used to control the temperature of the battery to be maintained 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. The target temperature range is determined according to the target power range and the battery power.

[0125] The battery heating control device 700 is described in detail below, as follows:

[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 decrease rate of the battery before controlling the temperature of the battery to be maintained 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 control the temperature of the battery to be maintained 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] An acquisition submodule, used to acquire a full-power heating curve, where the full-power heating curve represents a corresponding relationship between battery power, battery temperature, and battery discharge power when the battery is heated according to the battery maximum heating power corresponding to the 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] An acquisition unit, used to acquire the ambient temperature, battery temperature, battery heat transfer coefficient, battery maximum heating power, battery energy, battery heat capacity and average power consumption, where the average power consumption is the average power consumption excluding the battery heating power during the driving of the vehicle;

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

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

[0137] The third representation unit is used to represent the rate of power reduction by using the maximum heating power of the battery, the average power consumption and the battery energy;

[0138] A construction unit is used to construct a full-power heating curve according to the battery heat dissipation power, temperature rise rate and power decrease rate.

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

[0140] A construction subunit is used to construct an initial full-power heating curve according to the battery heat dissipation power, temperature rise rate and power reduction rate;

[0141] An acquisition subunit, used to acquire the estimated remaining power of the vehicle when it reaches the end of the trip;

[0142] A first determination subunit is used to determine an estimated battery temperature according to a first target discharge power and an estimated remaining power, wherein the first target discharge power is a discharge power that meets a basic power requirement of the vehicle, and the first target discharge power belongs to a target power range;

[0143] A calculation subunit, used for substituting the estimated remaining power and the estimated battery temperature into the initial full-power heating curve and outputting an integral constant;

[0144] The second determining subunit is used to determine the full-power heating curve according to 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 maximum heating power of the battery 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 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 control the temperature of the battery to be maintained within the target temperature range according to the closed-loop control strategy when the estimated mileage of the vehicle is greater than the preset mileage and the actual discharge power enters the target power range.

[0149] In the battery heating control device of the embodiment of the present application, 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 power, therefore, by controlling the battery temperature to be maintained 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 (that is, the actual discharge power is reduced to the maximum discharge power in the target power range), the actual discharge power can be ensured to be stable within the target power range, thereby ensuring both the vehicle's power performance and the battery's endurance.

[0150] Based on the battery heating control method provided in the above embodiment, the embodiment of the present application also provides a specific implementation of a vehicle, wherein the vehicle may include a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the above battery heating control method is implemented.

[0151] As an example, a vehicle may include an electronic device that may include the above-mentioned processor and a memory storing computer program instructions.

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

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

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

[0155] The memory 820 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 820 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. Where appropriate, the memory 820 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 820 may be inside or outside the electronic device 800. In a particular embodiment, the memory 820 is a non-volatile solid-state memory.

[0156] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) 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 the present application.

[0157] The processor 810 implements any one of the battery heating control methods in the above embodiments by reading and executing computer program instructions stored in the memory 820 .

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

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

[0160] Bus 840 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 840 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0161] Exemplarily, the electronic device 800 may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA).

[0162] The electronic device can execute the battery heating control method in the embodiment of the present application, thereby realizing the combination Figures 1 to 7 A battery heating control method and device are described.

[0163] In addition, in combination with the battery heating control method in the above embodiment, the embodiment of the present application can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the battery heating control methods in the above embodiment is implemented.

[0164] In combination with the battery heating control method in the above embodiment, the present application embodiment can provide a computer program product for implementation. When the instructions in the computer program product are executed by a processor of an electronic device, any one of the battery heating control methods in the above embodiment is implemented.

[0165] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present 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, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in 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, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0167] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. 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 embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0168] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.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 can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0169] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A battery heating control method, characterized in that: include: Obtaining an actual discharge power and a target power range of the battery, wherein the target power range is a discharge power range that meets the basic power requirements of the vehicle; When 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 a closed-loop control strategy, and the target temperature range is determined according to the target power range and the power level of the battery.

2. The method according to claim 1, characterized in that When the actual discharge power enters the target power range, before controlling the temperature of the battery to be maintained within the target temperature range according to a closed-loop control strategy, the method further includes: Obtaining an estimated heating rate and a discharge decrease rate of the battery; When the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained 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 temperature of the battery is controlled to be maintained within the target temperature range according to a closed-loop control strategy.

3. The method according to claim 2, characterized in that The obtaining the estimated heating rate of the battery comprises: Acquire a full-power heating curve, where the full-power heating curve represents a corresponding relationship between battery power, battery temperature, and battery discharge power when the battery is heated according to a battery maximum heating power corresponding to the battery; The slope of the full power heating curve is determined as the estimated heating rate.

4. The method according to claim 3, characterized in that The obtaining of the full-power heating curve comprises: Acquire the ambient temperature, battery temperature, battery heat transfer coefficient, battery maximum heating power, battery energy, battery heat capacity and average power consumption, wherein the average power consumption is the average power consumption excluding the battery heating power during the driving of the vehicle; The battery heat dissipation power is expressed by the ambient temperature, the battery temperature and the battery heat transfer coefficient; The temperature rise rate is expressed by the maximum heating power of the battery, the heat dissipation power of the battery and the heat capacity of the battery; The rate of power reduction is represented by the maximum heating power of the battery, the average power consumption and the battery energy; The full-power heating curve is constructed according to the battery heat dissipation power, the temperature rising rate and the power decreasing rate.

5. The method according to claim 4, characterized in that The constructing the full-power heating curve according to the battery heat dissipation power, the temperature rising rate and the power decreasing rate includes: Constructing an initial full-power heating curve according to the battery heat dissipation power, the temperature rise rate and the power decrease rate; Obtain the estimated remaining power of the vehicle when it reaches the end of the journey; determining an estimated battery temperature according to a first target discharge power and the estimated remaining power, wherein the first target discharge power is a discharge power that meets a basic power requirement of the vehicle and the first target discharge power belongs to the target power range; Substituting the estimated remaining power and the estimated battery temperature into the initial full-power heating curve, and outputting an integral constant; The full power heating curve is determined according to the initial full power heating curve and the integration constant.

6. The method according to any one of claims 3 to 5, characterized in that: The method further comprises: When the estimated heating rate is less than or equal to the discharge decrease rate and the actual discharge power reaches a 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.

7. The method according to claim 1 or 2, characterized in that: When the actual discharge power enters the target power range, controlling the temperature of the battery to be maintained within the target temperature range according to a closed-loop control strategy includes: When the estimated mileage of the vehicle is greater than the preset mileage 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 a closed-loop control strategy.

8. A battery heating control device, characterized in that: The device comprises: A first acquisition module is used to acquire the actual discharge power and target power range of the battery, wherein the target power range is a discharge power range that meets the basic power requirements of the vehicle; The control module is used to control the temperature of the battery to be maintained 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 according to the target power range and the power level of the battery.

9. 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, the battery heating control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the battery heating control method according to any one of claims 1 to 7 is implemented.

11. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the battery heating control method according to any one of claims 1 to 7.

Images