Vehicle battery heating method, vehicle and storage medium

Abstract

The embodiment of the present application is applicable to the field of vehicle technology, and provides a vehicle battery heating method, a vehicle and a storage medium, the method comprising: obtaining vehicle information of the vehicle, the vehicle information including the distance from the vehicle to the charging pile, the expected arrival time, the first temperature of the rechargeable battery and the first power; for any preset charging temperature, based on the first power, distance and expected arrival time, predicting the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature; determining the first time to charge the first state of charge to the target state of charge based on the preset charging temperature and the preset charging parameters of the charging pile; determining the preset charging temperature corresponding to the minimum value of all the first time lengths as the target charging temperature; in the process of the vehicle arriving at the charging pile, heating the first temperature of the rechargeable battery to the target charging temperature. The above method can reduce the charging time of the rechargeable battery.

Description

Technical Field

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

[0002] With the shortage of oil resources and the improvement of environmental protection requirements, the number of vehicles using new energy is increasing. Among them, new energy vehicles usually use rechargeable batteries as a power source. Therefore, during long-distance travel, as the power is consumed, the battery usually needs to be charged.

[0003] However, temperature has a significant impact on the charging and discharging performance of the battery. Generally, within a certain temperature range, the charging performance of the battery will decrease as the temperature decreases. Therefore, in order to save the charging time of the vehicle at the charging station, it is necessary to use the battery's own power to preheat the battery.

[0004] At present, the preheating method is usually to estimate the available power remaining when the vehicle arrives at the charging station, and use the available power to heat the battery in advance. However, when using this method to preheat the battery, the vehicle may consume more power to preheat. Although the charging efficiency is increased, the amount of power required to charge the battery is increased. Therefore, the charging time of the battery is not reduced. Summary of the invention

[0005] The embodiments of the present application provide a vehicle battery heating method, a vehicle and a storage medium, which can solve the problem of a long charging time for a rechargeable battery.

[0006] In a first aspect, an embodiment of the present application provides a vehicle battery heating method, the method comprising:

[0007] Acquire vehicle information of the vehicle, the vehicle information including the distance from the vehicle to the charging pile, the estimated arrival time, the first temperature and the first power of the charging battery;

[0008] For any preset charging temperature, predicting the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature based on the first power level, the distance, and the estimated arrival time;

[0009] Determining a first time duration for charging the first state of charge to a target state of charge according to a preset charging temperature and preset charging parameters of the charging pile;

[0010] Determine the preset charging temperature corresponding to the minimum value of all the first time durations as the target charging temperature;

[0011] When the vehicle reaches the charging pile, the first temperature of the charging battery is heated to the target charging temperature.

[0012] In a second aspect, an embodiment of the present application provides a vehicle battery heating device, the device comprising:

[0013] A first acquisition module is used to acquire vehicle information of the vehicle, the vehicle information including the distance from the vehicle to the charging pile, the estimated arrival time, the first temperature and the first power of the charging battery;

[0014] A first prediction module is used to predict, for any preset charging temperature, a first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature according to the first power, the distance, and the estimated arrival time;

[0015] A first determination module, configured to determine a first time duration for charging the first state of charge to a target state of charge according to a preset charging temperature and preset charging parameters of the charging pile;

[0016] A second determining module is used to determine the preset charging temperature corresponding to the minimum value of all the first time periods as the target charging temperature;

[0017] The heating module is used to heat the first temperature of the rechargeable battery to a target charging temperature when the vehicle reaches the charging pile.

[0018] In a third aspect, an embodiment of the present application provides a control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method of the first aspect described above when executing the computer program.

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method of the first aspect described above is implemented.

[0020] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a control device, enables the control device to execute the method of the first aspect.

[0021] In a sixth aspect, an embodiment of the present application provides a vehicle, comprising a rechargeable battery and a vehicle battery heating device according to the second aspect, wherein the vehicle battery heating device is used to charge the rechargeable battery when executing the method according to the first aspect.

[0022] Compared with the prior art, the embodiment of the present application has the following beneficial effects: the distance from the vehicle to the charging pile, the expected arrival time, the current first temperature of the rechargeable battery, and the first power can be obtained first. Then, for any preset charging temperature, according to the first power, distance, and expected arrival time, the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature is predicted. Afterwards, because the charging efficiency of the battery is related to the temperature, the first time for charging the first state of charge to the target state of charge can be determined according to the preset charging temperature and the preset charging parameters of the charging pile. Finally, the preset charging temperature corresponding to the minimum value of all the first time lengths is determined as the target charging temperature, so that when the vehicle arrives at the charging pile, the first temperature of the rechargeable battery can be heated to the target charging temperature to improve the charging efficiency. Because the preset charging temperatures are different, the first state of charge remaining when the first temperature of the rechargeable battery is heated to the preset charging temperature is usually different. Based on this, when obtaining the first time length, not only the charging efficiency corresponding to the rechargeable battery at the preset charging temperature is considered, but also the charging amount required to charge the remaining first state of charge to the target state of charge is considered. In this way, after the preset charging temperature corresponding to the minimum value among all the first time periods is determined as the target charging temperature, the time required for charging the rechargeable battery at the optimal target charging temperature can be minimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a flow chart of a vehicle battery heating method according to an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of an implementation method for predicting a first state of charge in a vehicle battery heating method provided in an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of an implementation method for determining the heating time in a vehicle battery heating method provided in an embodiment of the present application;

[0027] Figure 4 is a flow chart of an implementation method of a vehicle battery heating method provided by another embodiment of the present application;

[0028] Figure 5 is a flow chart of a vehicle battery heating method provided in yet another embodiment of the present application;

[0029] Figure 6 It is a structural schematic diagram of a vehicle battery heating device provided by an embodiment of the present application;

[0030] Figure 7 It is a structural schematic diagram of a control device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0032] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0033] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] When charging a car's rechargeable battery, the rechargeable battery is usually preheated first to increase the temperature of the rechargeable battery in order to improve the charging efficiency of the rechargeable battery. At present, the preheating method is usually: the available power remaining when the vehicle arrives at the charging pile is estimated, and the available power is used to heat the rechargeable battery in advance. However, when preheating the battery in this way, the vehicle may consume more electricity. Although the charging efficiency is increased, the amount of electricity required to charge the battery is increased, so that the charging time of the rechargeable battery is not reduced. If the available power is not used or a small amount of available power is used to heat the rechargeable battery, the charging efficiency of the rechargeable battery is low during charging, and a long charging time is still required.

[0035] Based on this, in order to minimize the charging time required for charging, an embodiment of the present application provides a vehicle battery heating method, which can be applied to a control device in a vehicle, such as an electronic control unit (ECU) or a vehicle controller unit (VCU), without limitation.

[0036] It should be noted that the control device can communicate with the battery management system (BMS), air conditioning system or other devices in the vehicle through the controller area network (CAN). Among them, the battery management system includes the energy source of the vehicle, and can monitor and collect the operating status of each rechargeable battery in the energy storage unit in real time to ensure the safe and reliable operation of the energy storage unit. At the same time, the battery management system can also exchange information with other external devices through its own communication interface (for example, analog / digital input interface).

[0037] See also Figure 1 , Figure 1 A flowchart of a vehicle battery heating method provided by an embodiment of the present application is shown, and the method includes the following steps:

[0038] S101. Acquire vehicle information of the vehicle, where the vehicle information includes a distance from the vehicle to the charging pile, an estimated arrival time, a first temperature of the charging battery, and a first power level.

[0039] In one embodiment, the above charging pile is usually selected by the vehicle owner in advance, and the location of the selected charging pile is input as the destination into a preset map navigation module. Then, the map navigation module determines the current location of the vehicle according to the positioning device and generates a driving path from the current location to the charging pile.

[0040] It should be understood that when the map navigation module generates the driving route, it usually also displays the distance and estimated arrival time of the vehicle to the charging station.

[0041] The first temperature of the rechargeable battery is the temperature at the current moment, which can be obtained by a preset temperature sensor. In addition, the battery management system can monitor and collect the operating status of each rechargeable battery in the energy storage unit. Therefore, it can be considered that the battery management system can collect the first temperature and the first power of the rechargeable battery.

[0042] In one embodiment, the rechargeable battery may be a single single cell or a battery pack composed of a plurality of single cells, which is not limited thereto.

[0043] In another embodiment, the vehicle information also includes, but is not limited to: the heating sources in the vehicle that can heat the battery, the heating efficiency corresponding to each heating source, the electrical equipment in the vehicle that needs to consume power, the average energy consumption of each electrical equipment, and the energy consumption required for each kilometer of vehicle travel. The vehicle information can be pre-stored in the vehicle so that it can be obtained by the controlled device at any time.

[0044] S102: for any preset charging temperature, predict the first state of charge remaining when the vehicle arrives at the charging pile based on the first power level, the distance, and the estimated arrival time, and heat the first temperature of the rechargeable battery to the preset charging temperature.

[0045] In one embodiment, the preset charging temperature can be set in advance according to actual conditions. It is understandable that within a certain temperature range, the charging efficiency of the rechargeable battery will also increase with the increase of temperature. Therefore, multiple preset charging temperatures can be set in advance to improve the efficiency of charging the rechargeable battery at any preset charging temperature. Among them, the charging efficiency corresponding to the rechargeable battery at each preset charging temperature can be considered as a more preferred charging efficiency.

[0046] Exemplarily, the preset charging temperatures may be 22° C., 24° C., 26° C., and 28° C., respectively.

[0047] It should be noted that for different preset charging temperatures, the temperature difference between them and the first temperature at the current moment is different. Therefore, the energy consumption required to heat the first temperature to the preset charging temperature is different, so that when the first temperature of the rechargeable battery is heated to the preset charging temperature, the remaining first state of charge of the rechargeable battery is usually different. Based on this, although the charging efficiency of the rechargeable battery is improved when the first temperature of the rechargeable battery is heated to the preset charging temperature, the remaining first state of charge of the rechargeable battery is less, and the charging time is still not reduced.

[0048] In one embodiment, the state of charge is used to characterize the remaining capacity of the rechargeable battery, which is numerically defined as the ratio of the remaining capacity to the battery capacity, usually expressed as a percentage. For example, when the state of charge is 0, it means that the rechargeable battery is fully discharged, and when the state of charge is 1, it means that the rechargeable battery is fully charged.

[0049] Different from the state of charge, the power level can also represent the remaining power of the rechargeable battery, but the power level is used to specifically indicate the amount of charge in the rechargeable battery, and its unit is "kilowatt per hour".

[0050] Specifically, the control device can be based on Figure 2 S201-S204 shown determine the first state of charge, as detailed below:

[0051] S201. Predicting a first driving energy consumption required for a vehicle to travel a distance based on a preset driving energy consumption of the vehicle.

[0052] In one embodiment, the preset driving energy consumption may be the driving energy consumption set when the vehicle leaves the factory. For example, it may be the energy consumption required for the vehicle to travel 1 km. It is understandable that the vehicle information acquired in S101 includes the distance from the vehicle to the charging pile. Therefore, the control device may determine the product of the preset driving energy consumption and the distance as the first driving energy consumption.

[0053] S202: predicting a second driving energy consumption required for the vehicle to reach its expected arrival time based on the average energy consumption of electrical equipment in the vehicle.

[0054] In one embodiment, the electrical equipment is a device in the vehicle that needs electricity. Exemplarily, the electrical equipment includes but is not limited to power-consuming devices such as air conditioning equipment, digital instrument panels, and lights. A DC / DC converter is usually provided in the vehicle, which is used to convert the high voltage in the rechargeable battery into a constant low voltage of 12V, 14V, or 24V to power the electrical equipment in the vehicle.

[0055] Based on this, the vehicle owner can set the average energy consumption of the electrical equipment during the vehicle driving process in advance according to the actual situation. For example, the average energy consumption of the electrical equipment can be set to 700 W. Therefore, the control device can determine the product of the estimated arrival time and the average energy consumption as the second driving energy consumption.

[0056] It should be noted that the average energy consumption of each electrical device when in use may be pre-stored in the vehicle, and then the control device may count the sum of the average energy consumption of the electrical devices in use to calculate the second driving energy consumption. It is understandable that the air conditioning device may not be in use. Therefore, the control device may also calculate the second driving energy consumption based on the electrical devices actually used in the vehicle.

[0057] S203: predicting a target energy consumption required to heat the first temperature of the rechargeable battery to a preset charging temperature according to a heating efficiency of a preset target heating source in the vehicle.

[0058] In one embodiment, when a pure electric vehicle preheats a rechargeable battery, it also heats it with the power of the rechargeable battery itself. Therefore, different preset charging temperatures usually correspond to different target energy consumptions, so that the remaining first charge state of the vehicle when it arrives at the charging pile is different.

[0059] In one embodiment, the heating efficiency of the target heating source can be pre-set according to actual conditions. Generally, a plurality of heating sources can be pre-set in the vehicle, and the heating efficiencies corresponding to different heating sources are different. The heating efficiency is the efficiency of converting electric power into heat when different heating sources are working.

[0060] Exemplarily, the preset heating sources in the vehicle may be: a compressor, an auxiliary heating system, and an electric bridge. The three preset heating sources may constitute a plurality of heating modes. For example, the auxiliary heating system heats alone, the auxiliary heating system heats in combination with the compressor, the auxiliary heating system heats in combination with the electric bridge, the auxiliary heating system, the compressor, and the electric bridge heat in combination, and the like, without limitation.

[0061] For example, the compressor heating uses the engine coolant as a heat source for heat supply. When the engine coolant temperature is high, the coolant flows through the heat exchanger in the heating system and can exchange heat with the air sent by the blower. After the air is heated, it is sent into the vehicle through various air outlets by the blower to achieve heating.

[0062] Each heating mode can be pre-stored in a thermal management module in the vehicle, and the control device can display each heating mode and the heating efficiency corresponding to the heating mode in the display interface of the thermal management module. Afterwards, the preset heating source corresponding to the heating mode with the highest heating efficiency is determined as the target heating source. It is also possible to receive an operation instruction from the owner to operate the display interface, determine the target heating mode selected by the owner according to the operation instruction, and determine the preset heating source corresponding to the target heating mode as the target heating source, without limitation.

[0063] It should be added that the heating efficiency of the target heating source is also related to factors such as the current ambient temperature and whether the passenger compartment heating (e.g., air conditioning heating, seat heating, etc.) is turned on. Therefore, after determining the heating efficiency corresponding to the target heating source, the heating efficiency corresponding to the target heating source can be adjusted according to the above factors to obtain the target heating efficiency corresponding to the target heating source, so as to accurately predict the target energy consumption.

[0064] Among them, the relationship between the heating efficiency of the target heating source and factors such as the current ambient temperature and whether the passenger compartment heating (for example, air-conditioning heating, seat heating, etc.) is turned on can be set in advance according to actual conditions, and there is no limitation on this.

[0065] In one embodiment, the control device may calculate the temperature difference between the first temperature and the preset charging temperature, and calculate the heating amount of the rechargeable battery according to the temperature difference and the preset specific heat capacity of the rechargeable battery. Finally, the target energy consumption is determined according to the heating amount and the heating efficiency.

[0066] The specific heat capacity is the amount of heat required to raise the temperature of 1 kg of a homogeneous substance by 1 K. The specific heat capacity of a substance is determined by its own properties and has nothing to do with the temperature and density of the object. Therefore, the specific heat capacity of a rechargeable battery can be obtained by taking the mass-weighted average of the components of the rechargeable battery with known specific heat capacity. The amount of heating required for the rechargeable battery can then be obtained by multiplying the temperature difference by the specific heat capacity.

[0067] It is understandable that the greater the temperature difference, the higher the heating amount, and the required target energy consumption is generally higher. Similarly, in the case of lower heating efficiency, the required target energy consumption is also higher.

[0068] S204: predicting a first state of charge according to the first power level, the first driving energy consumption, the second driving energy consumption, and the target energy consumption.

[0069] In a specific embodiment, the first power level, the distance, and the estimated arrival time are input into a charge calculation formula to obtain a first charge state; the charge calculation formula is as follows:

[0070] SOC remanent =(E-E1*L1-T1*P1-E2)*SOH / E3;

[0071] Among them, SOC remanent Indicates the first state of charge; E indicates the first power level; E1 indicates the preset driving energy consumption; L1 indicates the distance; T1 indicates the estimated arrival time; P1 indicates the average energy consumption; E2 indicates the target energy consumption; SOH indicates the preset health of the rechargeable battery; and E3 indicates the rated nominal capacity of the rechargeable battery.

[0072] The battery health is expressed as the ratio of the actual capacity to the designed capacity. Initially, the preset health of the rechargeable battery is usually 100%. However, as the use time increases, the battery health usually decreases gradually. At this time, the control device can fine-tune the 100% health according to the service life of the rechargeable battery to obtain the preset health of the rechargeable battery at the current moment.

[0073] Exemplarily, the health level of 100% may be fine-tuned at a decreasing rate of 5%-10% per year, but this is not limiting.

[0074] In one embodiment, battery capacity is one of the important performance indicators for measuring battery performance, which indicates the amount of electricity discharged by the battery under certain conditions (a certain discharge current / power, temperature, termination voltage, etc.), that is, the capacity of the battery. It can be expressed by the integral of the discharge current / power over the duration, usually in ampere-hours or watt-hours.

[0075] Specifically, the rated nominal capacity of a rechargeable battery is the nominal capacity of the rechargeable battery under calibrated or specified conditions. It is generally necessary to specify the specifications it complies with or to specify the relevant rated nominal conditions that affect the battery capacity, such as temperature, discharge current / discharge power, and termination voltage. The rated nominal capacity can be a specific value that can be determined in advance.

[0076] S103: Determine a first time duration for charging the first state of charge to a target state of charge according to a preset charging temperature and preset charging parameters of the charging pile.

[0077] In one embodiment, the target state of charge may be 1 (ie, the rechargeable battery is fully charged), or other values, which are not limited thereto.

[0078] The charging time of the rechargeable battery is usually related to factors such as the temperature of the rechargeable battery, the charging rate, and the preset charging parameters of the charging pile. The preset charging parameters include but are not limited to the preset output power, maximum output voltage, and maximum output current of the charging pile, which are not limited to this. In this embodiment, the above-mentioned preset charging parameters can specifically be the preset output power.

[0079] Based on this, the control device can first determine the charging rate of the rechargeable battery when the vehicle arrives at the charging pile according to the preset charging temperature and the first state of charge, and determine the charging power of the rechargeable battery according to the charging rate. After that, the minimum value of the charging power and the preset output power is determined as the target charging power, so as to determine the first time duration for charging the first state of charge to the target state of charge according to the target charging power.

[0080] Specifically, the control device may pre-store the corresponding charging rate of the rechargeable battery at each preset charging temperature and each first state of charge. For example, when the preset charging temperature is A and the first state of charge is 0-30%, the charging rate may be A1; when the preset charging temperature is A and the first state of charge is 30%-60%, the charging rate may be A2. In this way, the association between each preset charging temperature and each first state of charge and the charging rate is respectively constructed.

[0081] In one embodiment, the preset output power is the maximum output power of the charging pile when charging the external battery. The car owner can determine the preset output power of the charging pile through a preset APP. For example, the APP is pre-set with the location information of multiple charging piles and charging pile information (preset charging parameters of the charging piles, the number of idle charging piles, etc.) to provide charging services for car owners who log in to the APP.

[0082] Among them, the charging rate is a measure of charging speed, which refers to the current value required for the battery to be charged to its rated capacity within a specified time, usually represented by the letter C. For example, for a 600KW / H, 1C rechargeable battery, when charged at a power of 600KW, the charging rate is 1C, and it takes 1 hour to fully charge. If charged at a power of 300KW, the charging rate is 0.5C at this time, and it takes 2 hours to fully charge. Among them, 600KW / H is the rated nominal capacity of the above-mentioned rechargeable battery. Based on this, after determining the charging rate, the actual charging power of the rechargeable battery can be determined according to the rated nominal capacity of the rechargeable battery.

[0083] It should be noted that in the preset output power of the charging pile, the current output per unit time needs to be equal to the charging power of the above-mentioned rechargeable battery, 600KW. Otherwise, if the power output per unit time in the preset output power of the charging pile is less than the charging power of the above-mentioned rechargeable battery, 600KW, the charging time will be further extended. For example, if the power output per unit time in the preset output power of the charging pile is 150KW, the charging time will be four times the original charging time. That is, the above-mentioned first time duration is related to the charging rate and the preset output power of the charging pile, which will not be described in detail.

[0084] Specifically, when the charging power of the rechargeable battery determined by the charging rate is 300KW, it takes 2 hours to charge at a charging power of 300KW. However, the preset output power of the charging pile can only output 150KW. Therefore, when calculating the first duration, the calculation is based on the minimum value of the charging power and the preset output power (150KW).

[0085] It is understandable that at different preset charging temperatures, the corresponding charging rates are usually different, and the amount of electricity required to charge the first state of charge to the target state of charge is also different. Therefore, the first duration corresponding to each preset charging temperature is usually different.

[0086] Exemplarily, the preset charging temperature A is greater than the preset charging temperature B, and the charging rate of the rechargeable battery at the preset charging temperature A is higher than the charging rate at the preset charging temperature B. The energy consumption required to heat the first temperature to the preset charging temperature A is greater than the energy consumption required to heat the first temperature to the preset charging temperature B, so that the first state of charge A1 remaining after heating to the preset charging temperature A is less than the first state of charge B1 remaining after heating to the preset charging temperature B. Based on this, when the first state of charge of the rechargeable battery needs to be charged to the target state of charge, although the charging rate at the preset charging temperature A is higher than the charging rate at the preset charging temperature B, the state of charge required to be charged at the preset charging temperature A is larger. Therefore, this embodiment can determine the first duration corresponding to each preset charging temperature according to step S103.

[0087] S104: Determine the preset charging temperature corresponding to the minimum value in all the first time periods as the target charging temperature.

[0088] S105. When the vehicle reaches the charging pile, the first temperature of the rechargeable battery is heated to a target charging temperature.

[0089] In one embodiment, after determining the first duration of each preset charging temperature, the preset charging temperature corresponding to the minimum value of all the first durations can be determined as the target charging temperature, so that the first temperature of the rechargeable battery is heated to the target charging temperature when the vehicle reaches the charging pile. Thus, the charging time can be reduced when the vehicle reaches the charging pile for charging.

[0090] In one embodiment, the distance from the vehicle to the charging pile, the expected arrival time, the current first temperature of the rechargeable battery, and the first power level can be obtained first. Then, for any preset charging temperature, the vehicle is predicted to arrive at the charging pile according to the first power level, the distance, and the expected arrival time, and the first state of charge remaining when the first temperature of the rechargeable battery is heated to the preset charging temperature. Afterwards, because the charging efficiency of the battery is related to the temperature, the first time for charging the first state of charge to the target state of charge can be determined according to the preset charging temperature. Finally, the preset charging temperature corresponding to the minimum value of all the first time lengths is determined as the target charging temperature, so that when the vehicle arrives at the charging pile, the first temperature of the rechargeable battery can be heated to the target charging temperature to improve the charging efficiency. Because the preset charging temperatures are different, the first state of charge remaining when the first temperature of the rechargeable battery is heated to the preset charging temperature is usually different. Based on this, when obtaining the first time length, not only the charging efficiency corresponding to the rechargeable battery at the preset charging temperature is considered, but also the charging amount required to charge the remaining first state of charge to the target state of charge is considered. In this way, after the preset charging temperature corresponding to the minimum value among all the first time periods is determined as the target charging temperature, the time required for charging the rechargeable battery at the optimal target charging temperature can be minimized.

[0091] It should be added that the heating time of the rechargeable battery may be shorter than the estimated arrival time of the vehicle at the charging pile. Therefore, if the rechargeable battery is heated directly, the vehicle may not reach the charging pile when the rechargeable battery is heated to the target charging temperature, so the control device needs to consume additional power to maintain the temperature of the rechargeable battery.

[0092] Based on this, in order to make the temperature of the charging battery reach the target charging temperature when the vehicle reaches the charging pile, the control device can also Figure 3 The steps S301-S303 shown heat the rechargeable battery.

[0093] Details are as follows:

[0094] S301. Predicting, based on a heating efficiency of a target heating source preset in the vehicle, a second time required to heat a first temperature of a rechargeable battery to a target charging temperature.

[0095] In one embodiment, the heating efficiency is explained in the above S203, which will not be described again. The control device may calculate the temperature difference between the first temperature and the target charging temperature, and then determine the ratio of the temperature difference to the heating efficiency as the second time length.

[0096] S302: If the estimated arrival time is less than the second time, control the target heating source to heat the first temperature of the rechargeable battery to the target charging temperature.

[0097] S303: If the estimated arrival time is greater than or equal to the second time, continue to obtain the estimated arrival time until the estimated arrival time is less than the second time, and control the target heating source to heat the first temperature of the rechargeable battery to the target charging temperature.

[0098] It is understandable that when the estimated arrival time is less than the second time, it means that the time it takes for the vehicle to arrive at the charging pile is less than the time it takes to heat the rechargeable battery. Therefore, in order to increase the temperature of the rechargeable battery, the control device can immediately control the target heating source to heat the rechargeable battery so that the temperature of the rechargeable battery is as close to the target charging temperature as possible when the vehicle arrives at the charging pile.

[0099] Similarly, when the estimated arrival time is greater than or equal to the second time, it indicates that the time taken for the vehicle to arrive at the charging pile is greater than or equal to the time taken to heat the rechargeable battery. Therefore, in order to maintain the temperature of the rechargeable battery without consuming additional power, the control device can obtain the estimated arrival time in real time, and control the target heating source to heat the rechargeable battery when the estimated arrival time is less than the second time. In this way, the temperature of the rechargeable battery can be set to the target charging temperature when the vehicle arrives at the charging pile, saving charging time.

[0100] In another embodiment, the target energy consumption required to heat the first temperature of the rechargeable battery to the target charging temperature is relatively high, so that the remaining first state of charge of the rechargeable battery is relatively small. Therefore, although the charging rate of the rechargeable battery is increased during charging, the first time required to charge the rechargeable battery to the target state of charge is still relatively long due to the large difference between the first state of charge and the target state of charge. In addition, if a higher target energy consumption is used when heating the first temperature of the rechargeable battery to the target charging temperature, when the charging pile is already used by other vehicles and there are no other idle charging piles, the vehicle may not be able to reach the next charging pile based on the remaining first state of charge.

[0101] Based on this, the control device can also Figure 4The steps S401-S404 shown determine whether to heat the rechargeable battery. The details are as follows:

[0102] S401. Predicting, based on the first power level, the distance, and the estimated arrival time, a second state of charge remaining when the vehicle arrives at the charging pile without heating the rechargeable battery.

[0103] In one embodiment, the method of obtaining the second state of charge is similar to the method of obtaining the first state of charge, except that the heating source is not controlled to heat the rechargeable battery. Therefore, according to the formula in S204, it can be seen that when calculating the second state of charge, it is not necessary to consider the target energy consumption.

[0104] It should be added that when the rechargeable battery is not heated, the vehicle still needs to consume the first driving energy consumption and the second driving energy consumption when driving to the charging pile. Therefore, the second state of charge corresponding to each preset charging temperature is the same.

[0105] S402: Determine, according to the first temperature, a third time duration for charging the second state of charge to a target state of charge.

[0106] It is understandable that, since the target heating source is not controlled to charge the rechargeable battery, the temperature of the rechargeable battery is still the first temperature when the vehicle reaches the charging pile. Based on this, the control device can determine the third time period in the same manner as determining the first time period in S103 above.

[0107] It should be added that, since the vehicle is a pure electric vehicle, it needs a rechargeable battery to drive it when it is driving. However, when the rechargeable battery is discharged, its temperature will rise automatically. Therefore, when determining the third time period based on the first temperature, it is also necessary to determine the temperature of the vehicle when it arrives at the charging pile.

[0108] Specifically, the control device can determine the temperature rise rate of the rechargeable battery during driving according to the discharge power of the rechargeable battery and the ambient temperature during driving of the vehicle. Among them, the correlation between the temperature rise rate and the discharge power and ambient temperature of the rechargeable battery can be set in advance. Exemplarily, the vehicle can be tested in advance to collect the relationship between various discharge powers and ambient temperatures and temperature rise rates, and store them. Afterwards, the control device can add the product of the temperature rise rate and the expected arrival time to the first temperature to obtain the actual charging temperature when the vehicle arrives at the charging pile.

[0109] It should be noted that when predicting the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature in the above step S102, the temperature rise rate of the vehicle also needs to be considered. Therefore, when calculating the first state of charge, it can first calculate the product of the temperature rise rate caused by the discharge of the rechargeable battery and the expected arrival time to obtain the temperature rise caused by self-discharge. After that, the temperature rise caused by self-discharge and the preset charging temperature are subtracted from the preset charging temperature to obtain the final temperature difference to calculate the above target energy consumption.

[0110] S403: If the time difference between the first time period and the third time period corresponding to the target charging temperature is less than or equal to the second preset time period, stop heating the rechargeable battery when the vehicle reaches the charging pile.

[0111] S404: If the time difference between the first time duration and the third time duration corresponding to the target charging temperature is greater than the second preset time duration, a step of heating the first temperature of the rechargeable battery to the target charging temperature is performed when the vehicle reaches the charging pile.

[0112] In one embodiment, the second preset duration can be set according to actual conditions, and is not limited thereto. Exemplarily, the second preset duration can be 10 minutes. It is understandable that when the time difference between the first duration and the third duration corresponding to the target charging temperature is less than or equal to the second preset duration, it indicates that the first duration required to control the target heating source to charge the rechargeable battery is slightly different from the third duration required to charge the rechargeable battery without controlling the target heating source.

[0113] Based on this, in order to avoid using a higher target energy consumption when heating the first temperature of the rechargeable battery to the target charging temperature, when the charging pile is already used by other vehicles and there are no other idle charging piles, the vehicle may not be able to reach the next charging pile based on the remaining first state of charge. In this embodiment, the control device may not heat the rechargeable battery when the vehicle reaches the charging pile, so that the vehicle still has enough cruising distance to reach the next charging pile.

[0114] In addition, when the time difference between the first duration and the third duration corresponding to the target charging temperature is greater than the second preset duration, the control device may perform a step of heating the first temperature of the rechargeable battery to the target charging temperature when the vehicle reaches the charging pile, thereby reducing the charging time.

[0115] However, when the first temperature of the rechargeable battery is heated to the target charging temperature, if the charging pile is already used by other vehicles and there are no other free charging piles, the vehicle needs to wait for a long time here or drive to the next charging pile. However, if the waiting time is long, the purpose of reducing the charging time is not achieved; if the vehicle drives to the next charging pile, the vehicle may not be able to reach the next charging pile based on the remaining first state of charge.

[0116] Therefore, when the time difference between the first time period and the third time period corresponding to the target charging temperature is greater than the second preset time period, the control device may also be based on the following example: Figure 5 S501-S503 shown further determine whether the rechargeable battery needs to be heated. The details are as follows:

[0117] S501. Predicting a cruising range of a vehicle when it arrives at a charging station based on a first state of charge corresponding to a target charging temperature and a preset driving energy consumption of the vehicle.

[0118] In one embodiment, the estimated driving energy consumption has been explained in the above S201, and will not be described again. The above cruising distance is the distance that the rechargeable battery can still travel in the first state of charge.

[0119] Based on this, the control device can predict the remaining driving distance of the vehicle when it arrives at the charging pile according to the first state of charge remaining after the rechargeable battery is heated to the target charging temperature and the preset driving energy consumption. Specifically, the control device can determine the remaining power of the rechargeable battery according to the first state of charge, and then determine the ratio of the remaining power to the preset driving energy consumption as the driving distance.

[0120] S502: If the cruising distance is less than or equal to the preset distance, the heating of the rechargeable battery is stopped when the vehicle reaches the charging pile.

[0121] S503: If the cruising distance is greater than the preset distance, a step of heating the first temperature of the rechargeable battery to a target charging temperature is performed when the vehicle reaches the charging pile.

[0122] In one embodiment, the preset distance can be set according to actual conditions, and is not limited thereto. For example, the preset distance can be 40 km.

[0123] It is understandable that when the cruising distance is less than or equal to the preset distance, it can be considered that if the charging pile has been used by other vehicles and there are no other idle charging piles, it is difficult for the vehicle to reach the next charging pile and the vehicle can only wait at the charging pile. Therefore, in order to have more options, the control device can stop heating the rechargeable battery so that when the charging pile has been used by other vehicles and there are no other idle charging piles, the rechargeable battery can still have enough power to support the vehicle to reach the next charging pile.

[0124] Similarly, when the cruising range is greater than the preset distance, it can be considered that the vehicle can reach the next charging pile even if the charging pile is already in use by other vehicles and there are no other idle charging piles. Therefore, the first temperature of the rechargeable battery can be heated to the target charging temperature so that the charging time can be reduced when the charging pile is not in use by other vehicles or there are other idle charging piles.

[0125] It should be noted that the above steps S501-S503 can be combined with steps S401-S403 to determine whether the rechargeable battery needs to be heated, or the above steps S501-S503 or S401-S403 can be used alone to determine whether the rechargeable battery needs to be heated, and there is no limitation on this.

[0126] It should also be added that before executing the above steps S101-S105 and other embodiments, it should be determined whether the owner intends to charge the vehicle's rechargeable battery. Specifically, the control device can determine whether the owner intends to charge the vehicle's rechargeable battery based on the following conditions, and execute the above steps S101-S105 and other embodiments when it is determined that there is an intention to charge. Exemplary, the judgment conditions can be: the vehicle is in a driving state; the destination in the preset map navigation module is the location of the charging pile; the output power of the charging pile is greater than the preset target output power.

[0127] When the vehicle is in a driving state, it can be considered that the vehicle is consuming power, so there is a need to charge the rechargeable battery. When the vehicle is in a stopped state, it can be considered that the vehicle has arrived at the destination, so there is no need to perform the above steps S101-S105 and other embodiments.

[0128] In addition, when the destination in the preset map navigation module is the location of the charging pile, the owner believes that the battery is insufficient and needs to be charged. Similarly, when the destination is not the location of the charging pile, it can be considered that the vehicle has enough power to reach the destination. In other words, there is no need to charge the battery. Therefore, there is no need to heat the battery.

[0129] And, when the output power of the charging pile is less than or equal to the preset target output power, it can be considered that the charging pile needs a longer time to charge the rechargeable battery. At this time, it can be considered that even if the control device heats the rechargeable battery, it will not reduce the charging time of the rechargeable battery. Therefore, when the output power of the charging pile is less than or equal to the preset target output power, the control device may not need to perform the above steps S101-S105 and other embodiments. Among them, the above preset target output power can be 50KW.

[0130] It should be noted that if any of the above judgment conditions does not meet the requirements, it is considered that the control device does not need to execute the above steps S101-S105 and other embodiments.

[0131] See also Figure 6 , Figure 6 1 is a structural block diagram of a vehicle battery heating device provided in an embodiment of the present application. The vehicle battery heating device in this embodiment includes modules for executing Figures 1 to 5 For details, please refer to the steps in the corresponding embodiment. Figures 1 to 5 as well as Figures 1 to 5 For the convenience of explanation, only the parts related to this embodiment are shown. Figure 6 The vehicle battery heating device 600 may include: a first acquisition module 610, a first prediction module 620, a first determination module 630, a second determination module 640 and a heating module 650, wherein:

[0132] The first acquisition module 610 is used to acquire vehicle information of the vehicle, where the vehicle information includes the distance from the vehicle to the charging pile, the estimated arrival time, the first temperature and the first power of the charging battery.

[0133] The first prediction module 620 is used to predict, for any preset charging temperature, a first state of charge remaining when the vehicle arrives at the charging pile and heats the first temperature of the rechargeable battery to the preset charging temperature based on the first power, distance, and estimated arrival time.

[0134] The first determination module 630 is used to determine a first time duration for charging the first state of charge to a target state of charge according to a preset charging temperature and preset charging parameters of the charging pile.

[0135] The second determining module 640 is configured to determine the preset charging temperature corresponding to the minimum value in all the first time periods as the target charging temperature.

[0136] The heating module 650 is used to heat the first temperature of the rechargeable battery to a target charging temperature when the vehicle reaches the charging pile.

[0137] In one embodiment, the first prediction module 620 is further configured to:

[0138] Based on the preset driving energy consumption of the vehicle, predict the first driving energy consumption required for the vehicle's driving distance; based on the average energy consumption of the electrical equipment in the vehicle, predict the second driving energy consumption required for the vehicle's estimated arrival time; based on the heating efficiency of the preset target heating source in the vehicle, predict the target energy consumption required to heat the first temperature of the rechargeable battery to the preset charging temperature; based on the first power, the first driving energy consumption, the second driving energy consumption and the target energy consumption, predict the first state of charge.

[0139] In one embodiment, the first prediction module 620 is further configured to:

[0140] The temperature difference between the first temperature and the preset charging temperature is calculated; the heating amount of the rechargeable battery is calculated according to the temperature difference and the preset specific heat capacity of the rechargeable battery; and the target energy consumption is determined according to the heating amount and the heating efficiency.

[0141] In one embodiment, the first prediction module 620 is further configured to:

[0142] The first power level, distance, and estimated arrival time are input into a charge calculation formula to obtain a first charge state; the charge calculation formula is as follows:

[0143] SOC remanent =(E-E1*L1-T1*P1-E2)*SOH / E3;

[0144] Among them, SOC remanent Indicates the first state of charge; E indicates the first power level; E1 indicates the preset driving energy consumption; L1 indicates the distance; T1 indicates the estimated arrival time; P1 indicates the average energy consumption; E2 indicates the target energy consumption; SOH indicates the preset health of the rechargeable battery; and E3 indicates the rated nominal capacity of the rechargeable battery.

[0145] In one embodiment, the preset charging parameter includes a preset output power of the charging pile; the first determination module 630 is further used to:

[0146] Based on the preset charging temperature and the first state of charge, determine the charging rate of the charging battery when the vehicle arrives at the charging pile; determine the charging power of the charging battery based on the charging rate; determine the minimum value of the charging power and the preset output power as the target charging power; based on the target charging power, determine the first time duration for charging the first state of charge to the target state of charge.

[0147] In one embodiment, the heating module 650 is further used for:

[0148] Based on the heating efficiency of the target heating source preset in the vehicle, the second time required to heat the first temperature of the rechargeable battery to the target charging temperature is predicted; if the estimated arrival time is less than the second time, the target heating source is controlled to heat the first temperature of the rechargeable battery to the target charging temperature; if the estimated arrival time is greater than or equal to the second time, the estimated arrival time is continuously obtained until the estimated arrival time is less than the second time, and the target heating source is controlled to heat the first temperature of the rechargeable battery to the target charging temperature.

[0149] In one embodiment, the vehicle battery heating device 600 further includes:

[0150] The second prediction module is used to predict the second state of charge remaining when the vehicle arrives at the charging pile and the rechargeable battery is not heated according to the first power level, distance and expected arrival time.

[0151] The third determination module is used to determine a third time duration for charging the second state of charge to a target state of charge according to the first temperature.

[0152] The first stop module is used to stop heating the rechargeable battery when the vehicle reaches the charging pile if the time difference between the first time period and the third time period corresponding to the target charging temperature is less than or equal to the second preset time period.

[0153] The first execution module is used to execute the step of heating the first temperature of the rechargeable battery to the target charging temperature when the vehicle reaches the charging pile if the time difference between the first time period and the third time period corresponding to the target charging temperature is greater than the second preset time period.

[0154] In one embodiment, the vehicle battery heating device 600 further includes:

[0155] The third prediction module is used to predict the cruising range of the vehicle when it arrives at the charging pile according to the first state of charge corresponding to the target charging temperature and the preset driving energy consumption of the vehicle.

[0156] The second stop module is used to stop heating the rechargeable battery when the vehicle reaches the charging pile if the cruising distance is less than or equal to the preset distance.

[0157] The second execution module is used to execute the step of heating the first temperature of the rechargeable battery to a target charging temperature when the vehicle reaches the charging pile if the cruising distance is greater than a preset distance.

[0158] When it is understood that Figure 6 In the structural block diagram of the vehicle battery heating device shown, each module is used to execute Figures 1 to 5 The steps in the corresponding embodiments, and for Figures 1 to 5 Each step in the corresponding embodiment has been explained in detail in the above embodiment. Figures 1 to 5 as well as Figures 1 to 5 The relevant descriptions in the corresponding embodiments are not repeated here.

[0159] Figure 7 is a structural block diagram of a control device provided by an embodiment of the present application. Figure 7As shown, the control device 700 of this embodiment includes: a processor 710, a memory 720, and a computer program 730 stored in the memory 720 and executable on the processor 710, such as a program of a vehicle battery heating method. When the processor 710 executes the computer program 730, the steps in each embodiment of the above-mentioned vehicle battery heating method are implemented, such as Figure 1 Alternatively, the processor 710 implements the above when executing the computer program 730 Figure 6 The functions of each module in the corresponding embodiment are, for example, Figure 6 For details on the functions of modules 610 to 650, please refer to Figure 6 Related description in the corresponding embodiment.

[0160] Exemplarily, the computer program 730 may be divided into one or more modules, one or more modules are stored in the memory 720, and are executed by the processor 710 to implement the vehicle battery heating method provided in the embodiment of the present application. One or more modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 730 in the control device 700. For example, the computer program 730 may implement the vehicle battery heating method provided in the embodiment of the present application.

[0161] The control device 700 may include, but is not limited to, a processor 710 and a memory 720. Those skilled in the art will appreciate that Figure 7 It is only an example of the control device 700 and does not constitute a limitation of the control device 700. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the control device may also include input and output devices, network access devices, buses, etc.

[0162] The processor 710 may be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0163] The memory 720 may be an internal storage unit of the control device 700, such as a hard disk or memory of the control device 700. The memory 720 may also be an external storage device of the control device 700, such as a plug-in hard disk, a smart memory card, a flash memory card, etc. equipped on the control device 700. Furthermore, the memory 720 may also include both an internal storage unit of the control device 700 and an external storage device.

[0164] An embodiment of the present application provides a computer-readable storage medium, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the vehicle battery heating method described in the above-mentioned embodiments is implemented.

[0165] An embodiment of the present application provides a computer program product. When the computer program product is run on a control device, the control device executes the vehicle battery heating method in each of the above embodiments.

[0166] An embodiment of the present application provides a vehicle, including a rechargeable battery and a vehicle battery heating device, wherein the vehicle battery heating device is used to charge the rechargeable battery when executing the vehicle battery heating method in each of the above embodiments.

[0167] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A vehicle battery heating method, characterized in that: The method comprises: Acquire vehicle information of the vehicle, the vehicle information including the distance from the vehicle to the charging pile, the estimated arrival time, the first temperature and the first power of the charging battery; For any preset charging temperature, based on the first power level, the distance, and the estimated arrival time, predicting a first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature; Determining a first duration for charging the first state of charge to a target state of charge according to the preset charging temperature and preset charging parameters of the charging pile; Determining a preset charging temperature corresponding to a minimum value among all the first time periods as a target charging temperature; When the vehicle reaches the charging pile, heating the first temperature of the rechargeable battery to the target charging temperature; The step of heating the first temperature of the rechargeable battery to the target charging temperature during the process of the vehicle arriving at the charging pile includes: Based on the heating efficiency of the target heating source preset in the vehicle, the second time required to heat the first temperature of the rechargeable battery to the target charging temperature is predicted; if the estimated arrival time is less than the second time, the target heating source is controlled to heat the first temperature of the rechargeable battery to the target charging temperature; if the estimated arrival time is greater than or equal to the second time, the estimated arrival time is continuously obtained until the estimated arrival time is less than the second time, and the target heating source is controlled to heat the first temperature of the rechargeable battery to the target charging temperature.

2. The method according to claim 1, characterized in that The predicting, based on the first power level, the distance, and the estimated arrival time, the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature includes: Predicting a first driving energy consumption required for the vehicle to travel the distance according to a preset driving energy consumption of the vehicle; Predicting a second driving energy consumption required for the vehicle to travel the estimated arrival time according to the average energy consumption of the electrical equipment in the vehicle; predicting, according to a heating efficiency of a preset target heating source in the vehicle, a target energy consumption required to heat the first temperature of the rechargeable battery to the preset charging temperature; The first state of charge is predicted according to the first electrical quantity, the first driving energy consumption, the second driving energy consumption, and the target energy consumption.

3. The method according to claim 2, characterized in that The predicting, based on the heating efficiency of the target heating source preset in the vehicle, the target energy consumption required to heat the first temperature of the rechargeable battery to the preset charging temperature includes: calculating a temperature difference between the first temperature and the preset charging temperature; calculating a heating amount of the rechargeable battery according to the temperature difference and a preset specific heat capacity of the rechargeable battery; The target energy consumption is determined according to the heating amount and the heating efficiency.

4. The method according to claim 2, characterized in that: The step of measuring the first state of charge remaining when the vehicle arrives at the charging pile and the first temperature of the rechargeable battery is heated to the preset charging temperature according to the first power level, the distance, and the estimated arrival time includes: The first power level, the distance, and the estimated arrival time are input into a charge calculation formula to obtain the first charge state; the charge calculation formula is as follows: SOC remanent =(E-E1*L1-T1*P1-E2)*SOH / E3; Among them, SOC remanent represents the first state of charge; E represents the first power level; E1 represents the preset driving energy consumption; L1 represents the distance; T1 represents the estimated arrival time; P1 represents the average energy consumption; E2 represents the target energy consumption; SOH represents the preset health of the rechargeable battery; E3 represents the rated nominal capacity of the rechargeable battery.

5. The method according to claim 1, characterized in that The preset charging parameter includes a preset output power of the charging pile; and determining a first duration for charging the first state of charge to a target state of charge according to the preset charging temperature and the preset charging parameter of the charging pile includes: Determining, according to the preset charging temperature and the first state of charge, a charging rate of the rechargeable battery when the vehicle arrives at the charging pile; Determining the charging power of the rechargeable battery according to the charging rate; Determining a minimum value of the charging power and the preset output power as a target charging power; A first duration for charging the first state of charge to the target state of charge is determined according to the target charging power.

6. The method according to claim 1, characterized in that The method further comprises: Predicting, based on the first power level, the distance, and the estimated arrival time, a second state of charge remaining when the vehicle arrives at the charging pile without heating the rechargeable battery; determining, based on the first temperature, a third time duration for charging the second state of charge to the target state of charge; If the time difference between the first duration corresponding to the target charging temperature and the third duration is less than or equal to the second preset duration, the heating of the rechargeable battery is stopped when the vehicle reaches the charging pile; If the time difference between the first time period corresponding to the target charging temperature and the third time period is greater than the second preset time period, the step of heating the first temperature of the rechargeable battery to the target charging temperature during the process of the vehicle reaching the charging pile is executed.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: Predicting a cruising range of the vehicle when it arrives at the charging pile according to a first state of charge corresponding to the target charging temperature and a preset driving energy consumption of the vehicle; If the cruising distance is less than or equal to the preset distance, stopping heating the rechargeable battery when the vehicle reaches the charging pile; If the cruising distance is greater than a preset distance, the step of heating the first temperature of the rechargeable battery to the target charging temperature during the process of the vehicle reaching the charging pile is performed.

8. A vehicle, characterized in that: The invention comprises a rechargeable battery and a vehicle battery heating device, wherein the vehicle battery heating device is used to charge the rechargeable battery when executing the method according to any one of claims 1 to 7.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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