Heating control method, device and equipment of power battery and storage medium

Abstract

The invention provides a heating control method, device and equipment of a power battery and a storage medium, and belongs to the technical field of automobiles. The method comprises the steps that under the condition that a slow charging wake-up signal is received, current time is obtained, the slow charging wake-up signal is used for indicating that a charger in a vehicle is connected with an external charging pile through a slow charging gun, and the charger can obtain electric quantity from the charging pile through the slow charging gun; under the condition that the current time reaches the slow charging heating starting time, attribute information of a power battery in the vehicle is obtained, and the attribute information comprises at least one of the temperature, the charging power and the electric quantity of the power battery; and under the condition that the attribute information of the power battery meets the first heating condition, a charger in the vehicle is controlled to use the electric quantity obtained from the charging pile for heating the power battery. According to the method, the power battery is heated before the vehicle is used, the influence of low temperature on the performance of the power battery is reduced, the vehicle using time is saved while the vehicle running mileage is increased, and the vehicle using efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a heating control method, device, equipment and storage medium for a power battery. Background Art

[0002] With the rapid development of the electric vehicle industry, the mileage of power batteries is getting longer and longer. In recent years, many car companies have successively launched high-mileage models and power batteries. Because the operating temperature of the power battery is too low (such as the ambient temperature is lower than -20°C), the charging / discharging efficiency will be reduced and the battery body will be irreversibly damaged. Moreover, in the prior art, when the power battery is at a low temperature, the method usually adopted is to use the power battery's electric energy to heat itself. This solution can improve the above-mentioned problem, but it cannot fundamentally solve the problem. Using the vehicle's own electric energy for heating will cause the active consumption of the battery power before the vehicle starts driving, and the vehicle's mileage will still be reduced. How to heat the power battery is a research focus in this field. Summary of the invention

[0003] The embodiments of the present application provide a power battery heating control method, device, equipment and storage medium, which can heat the power battery in the vehicle before the vehicle is used, reduce the impact of low temperature on the power battery performance, and save vehicle time and improve vehicle efficiency while increasing vehicle mileage. The technical solution is as follows:

[0004] In one aspect, a method for controlling heating of a power battery is provided, the method comprising:

[0005] When a slow charging wake-up signal is received, the current time is obtained, wherein the slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through a slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun;

[0006] When the current time reaches the slow charging heating start time, acquiring attribute information of the power battery in the vehicle, the attribute information including at least one of the temperature, charging power and power of the power battery;

[0007] When the property information of the power battery satisfies a first heating condition, the charger in the vehicle is controlled to use the power obtained from the charging pile to heat the power battery.

[0008] In another aspect, a heating control device for a power battery is provided, the device comprising:

[0009] A first acquisition module is used to acquire the current time when a slow charging wake-up signal is received, wherein the slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through a slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun;

[0010] A second acquisition module is used to acquire attribute information of the power battery in the vehicle when the current time reaches the slow charging heating start time, wherein the attribute information includes at least one of the temperature, charging power and power of the power battery;

[0011] The control module is used to control the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery when the property information of the power battery meets the first heating condition.

[0012] In some embodiments, the second acquisition module is used to perform any of the following:

[0013] In response to a setting operation of a heating time of the power battery, taking the set heating time as the slow charging heating start time;

[0014] Determining the slow charging heating start time based on the historical heating time of the power battery, where the historical heating time is the heating time set by the manager of the vehicle within a historical time period;

[0015] Determining the slow charging and heating start time based on the future use time of the vehicle, where the future use time is the time when the vehicle is started for the first time in a future time period;

[0016] The slow charging heating start time is determined based on the temperature of the environment in which the vehicle is located.

[0017] In some embodiments, the second acquisition module includes:

[0018] A detection unit, used to detect the current temperature of the power battery in real time;

[0019] a first determining unit, configured to determine a heating time of the power battery based on a current temperature of the power battery and a target temperature, wherein the target temperature is a minimum temperature to be satisfied when the power battery is charged or discharged at a rated power;

[0020] The second determining unit is used to determine the slow charging heating start time based on the future use time of the vehicle and the heating duration.

[0021] In some embodiments, the second determination unit is used to determine the charging time of the vehicle based on the power level of the vehicle's power battery; and on the basis of the future use time of the vehicle, subtract the charging time and the heating time to obtain the slow charging heating start time.

[0022] In some embodiments, the second acquisition module is used to use the end time of the preset time as the start time of the slow charging heating when the temperature of the environment of the vehicle is lower than a preset ambient temperature and lasts for a preset time.

[0023] In some embodiments, the first heating condition includes at least one of the following:

[0024] The lowest temperature among the temperatures of the multiple cells in the power battery is lower than the preset battery temperature;

[0025] The charging power of the power battery is less than the rated power;

[0026] The power level of the power battery is lower than a preset power level.

[0027] In some embodiments, the control module is used to control the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery when the property information of the power battery meets the first heating condition and the configuration in the vehicle meets the second heating condition.

[0028] In some embodiments, the control module is further used to control the charger to stop heating the power battery and start charging the power battery when the vehicle meets the slow charging conditions.

[0029] On the other hand, a computer device is provided, which includes a processor and a memory, wherein the memory is used to store at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the heating control method of the power battery in the embodiment of the present application.

[0030] On the other hand, a computer-readable storage medium is provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor to implement a heating control method for a power battery in an embodiment of the present application.

[0031] On the other hand, a computer program product is provided, including a computer program, which is stored in a computer-readable storage medium. A processor of a computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the heating control method for a power battery provided in the above-mentioned various aspects or various optional implementations of various aspects.

[0032] The embodiment of the present application provides a heating control method for a power battery. Before the vehicle is used, the charger in the vehicle is connected to an external charging pile through a slow charging gun. While ensuring that the power battery in the vehicle can be charged, the slow charging gun can also be used to achieve slow charging heating of the power battery. That is, when a slow charging wake-up signal is received, it is determined that the charger in the vehicle and the external charging pile have been successfully connected through the slow charging gun. In this case, the current time is obtained. When the current time reaches the slow charging heating start time, the property information of the power battery in the vehicle is obtained to determine whether the power battery reaches the first heating condition. Since the property information of the power battery includes at least one of the temperature, charging power and power of the power battery, it can accurately reflect the current state of the power battery, so that it can accurately determine whether the power battery needs to be heated. When it is determined that heating is required, the charger in the vehicle is controlled to use the power obtained from the charging pile to heat the power battery. This method not only reduces the impact of low temperature on the performance of the power battery, but also does not consume the vehicle's own electrical energy, thereby ensuring the vehicle's operating mileage. The power battery can be heated to a suitable temperature before the vehicle is used, saving vehicle use time and improving vehicle use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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.

[0034] Figure 1 It is a schematic diagram of an implementation environment of a power battery heating control method provided in an embodiment of the present application;

[0035] Figure 2 is a flow chart of a heating control method for a power battery provided according to an embodiment of the present application;

[0036] Figure 3 It is a framework diagram of a power battery slow charging and heating system provided according to an embodiment of the present application;

[0037] Figure 4 is a block diagram of a heating control device for a power battery provided according to an embodiment of the present application;

[0038] Figure 5 is a structural block diagram of a terminal provided according to an embodiment of the present application;

[0039] Figure 6 It is a structural diagram of a server provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] In this application, the terms "first", "second", etc. are used to distinguish identical or similar items with basically the same effects and functions. It should be understood that there is no logical or temporal dependency between "first", "second", and "nth", nor is there any limitation on quantity and execution order.

[0042] In the present application, the term "at least one" means one or more, and the term "plurality" means two or more.

[0043] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions. For example, the property information of the power battery, historical heating time, and future use time of the vehicle involved in this application are all obtained with full authorization.

[0044] The heating control method of the power battery provided in the embodiment of the present application can be executed by a computer device. In some embodiments, the computer device is a terminal or a server. The following first takes the computer device as an example to introduce the implementation environment of the heating control method of the power battery provided in the embodiment of the present application. Figure 1 Schematic diagram of the implementation environment of a power battery heating control method provided in accordance with an embodiment of the present application. Figure 1 The implementation environment includes a terminal 101 and a server 102. The terminal 101 and the server 102 can be directly or indirectly connected via wired or wireless communication, which is not limited in this application.

[0045] In some embodiments, the terminal 101 may be a vehicle-mounted terminal, or a smart phone, tablet computer, laptop computer, desktop computer, smart speaker, smart watch, smart voice interaction device, smart home appliance, etc. that can remotely control the vehicle, but is not limited thereto. The terminal 101 installs and runs an application that supports battery heating. Schematically, the terminal 101 is a terminal used by a user. The user can use the terminal 101 to control the charger in the vehicle to heat the power battery in the vehicle.

[0046] Those skilled in the art will appreciate that the number of the above terminals may be more or less. For example, the above terminal may be only one, or the above terminals may be dozens or hundreds, or more. The embodiment of the present application does not limit the number of terminals and device types.

[0047] In some embodiments, server 102 is an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN (Content Delivery Network), big data and artificial intelligence platforms. Server 102 is used to provide background services for applications that support battery heating. In some embodiments, server 102 undertakes the main computing work and terminal 101 undertakes the secondary computing work; or, server 102 undertakes the secondary computing work and terminal 101 undertakes the main computing work; or, server 102 and terminal 101 use a distributed computing architecture for collaborative computing.

[0048] Figure 2 is a flow chart of a heating control method for a power battery provided in accordance with an embodiment of the present application, see Figure 2 In the embodiment of the present application, the method is described by taking the vehicle as an example. The method comprises the following steps:

[0049] 201. When receiving a slow charging wake-up signal, the vehicle obtains the current time. The slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through a slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun.

[0050] In an embodiment of the present application, after the vehicle is locked and powered off, the driver can insert a slow charging gun into the vehicle so as to connect the charger in the vehicle to the external charging pile through the slow charging gun. The slow charging gun can input the power in the charging pile into the charger in the vehicle, and the charger converts the AC power into DC power to slowly charge the power battery in the vehicle. In addition to slow charging, the vehicle heats the power battery through the charger. That is, the charger in the vehicle can power the heating system of the power battery so that the power battery can be passively heated.

[0051] Among them, when a slow charging gun is inserted into the vehicle, the slow charging gun can send a slow charging wake-up signal to the vehicle to notify the vehicle that the slow charging gun is connected. The slow charging wake-up signal may include a CC (Charge Connection) signal and a CP (Charge Pilot) signal. The CC signal is a charging connection confirmation, while the CP signal is a control confirmation. In other words, the main function of the CC signal is to confirm whether the charging connection is established. When the slow charging gun is inserted into the vehicle, a signal is sent through the CC interface, indicating that it is ready to be charged. The CP signal plays a key control role in the charging process. After the charging pile receives the signal from the vehicle through the CP interface, it closes the relay and starts the charging process (that is, it starts to deliver power to the charger in the vehicle).

[0052] When it is determined that the charger in the vehicle is connected to an external charging pile via a slow charging gun, the vehicle obtains the current time.

[0053] 202. When the current time reaches the slow charging heating start time, the vehicle obtains attribute information of the power battery in the vehicle, where the attribute information includes at least one of the temperature, charging power, and power of the power battery.

[0054] In the embodiment of the present application, the vehicle obtains the slow charging and heating start time, and the embodiment of the present application is not limited to this. Then, the vehicle determines whether the current time reaches the slow charging and heating start time. When the current time reaches the slow charging and heating start time, the vehicle obtains at least one attribute information of the power battery temperature, charging power, and power, so as to subsequently determine whether to heat the power battery based on the attribute information of the power battery.

[0055] In some embodiments, the vehicle may obtain the slow charging heating start time in any of the following ways. Four ways are shown below as examples, but are by no means limited thereto.

[0056] Method 1: The slow charging heating start time is set by the user (such as the driver or the vehicle manager). Accordingly, in response to the setting operation of the power battery heating time, the vehicle uses the set heating time as the slow charging heating start time. This method ensures that the heating process of the power battery is controlled by the user, making the control of the heating process more flexible and more in line with the user's intention.

[0057] Among them, the vehicle can be equipped with a hard switch or a soft switch for setting the heating time, and the embodiment of the present application is not limited to this. For example, the vehicle is equipped with a central control screen. The central control screen displays a soft switch for setting the heating time. After turning on the soft switch, the start time of the slow charging heating can be set, and the time in the next week can be set, and the embodiment of the present application is not limited to this.

[0058] Method 2: The vehicle can determine the slow charging heating start time based on the historical heating time of the power battery. The historical heating time is the heating time set by the vehicle manager within the historical time period. Since the historical heating time is the slow charging heating start time specified by the user (manager) within the historical time period, it can accurately reflect the user's needs for the heating process. Determining the slow charging heating start time based on the historical heating time of the power battery can ensure that the slow charging heating start time meets user needs, and the user does not need to manually set it each time, which is conducive to improving the user experience.

[0059] Among them, there are multiple historical heating times. The vehicle can select the historical heating time with the most applications from multiple historical heating times, and use the historical heating time as the start time of this slow charging and heating. Alternatively, the vehicle can also use the latest historical heating time applied among multiple historical heating times as the start time of this slow charging and heating. That is, the last slow charging and heating start time is used as the start time of this slow charging and heating. Alternatively, the vehicle can also perform weighted summation on multiple historical heating times to obtain the start time of this slow charging and heating. Among them, the weight of each historical heating time can be determined based on the gap between the application time of the historical heating time and the current time. The smaller the gap, the newer the application time of the historical heating time, and the higher the weight of the historical heating time; the larger the gap, the older the application time of the historical heating time, and the lower the weight of the historical heating time. The embodiment of the present application is not limited to this.

[0060] It should be noted that the multiple historical heating times are historical heating times in different units of time, such as 8 o'clock in the evening of every day, or 8 o'clock in the evening of Friday of every week.

[0061] Method three: The vehicle can determine the slow charging and heating start time based on the future use time of the vehicle. The future use time is the time when the vehicle is first started in the future time period. Since the future use time of the vehicle can reflect the use of the vehicle in the future, determining the slow charging and heating start time based on the future use time of the vehicle is conducive to ensuring that the heating process of the power battery can be suitable for the future use of the vehicle, that is, it is conducive to ensuring that the power battery is heated to a suitable state before the vehicle is used in the future, thereby saving vehicle use time and improving vehicle use efficiency.

[0062] In some embodiments, in the process of determining the slow charging and heating start time based on the future use time of the vehicle, the vehicle can detect the current temperature of the power battery in real time. Then, the vehicle determines the heating time of the power battery based on the current temperature of the power battery and the target temperature. Then, the vehicle determines the slow charging and heating start time based on the future use time of the vehicle and the heating time.

[0063] The target temperature is the minimum temperature that the power battery must meet when charging or discharging at rated power. The vehicle uses the difference between the current temperature of the power battery and the target temperature as the temperature increase range of the power battery. Then, the vehicle compares the temperature increase range with the heating rate of the power battery to obtain the heating time of the power battery. The heating rate of the power battery can be determined based on the heating rate in a historical time period. Then, the vehicle determines the start time of slow charging heating based on the future usage time and heating time.

[0064] The solution provided in the embodiment of the present application has a target temperature which is the minimum temperature that the power battery must meet when charging or discharging at rated power, that is, the minimum temperature at which the power battery operates normally, and is the minimum target for heating the power battery. According to the current temperature of the power battery and the target temperature, the required heating time for the power battery can be accurately determined, and then the start time of slow charging heating can be determined according to the future use time and heating time, to ensure that the power battery is heated to a suitable state before the vehicle is used in the future, thereby saving vehicle use time and improving vehicle use efficiency.

[0065] In the process of determining the slow charging heating start time based on the future usage time and heating time, the vehicle can directly subtract the heating time from the future usage time to obtain the slow charging heating start time, so as to ensure that the power battery is heated to a suitable state before the vehicle is used in the future, and the vehicle can be used immediately when it is heated to a suitable state, avoiding the temperature loss of the power battery due to stopping heating when it reaches a suitable state, thereby avoiding waste of resources.

[0066] Alternatively, the vehicle can also determine the start time of slow charging and heating based on the future use time and heating time, and consider the charging situation of the vehicle. That is, when the temperature of the power battery is low, the power battery cannot be charged at the rated power, but is charged at a smaller power, and the charging is slower; and when the temperature of the power battery reaches the target temperature, the power battery can be charged at the rated power, and the charging is faster. Accordingly, the vehicle in this scheme can first control the charger to heat the power battery, and then charge the power battery after the temperature of the power battery reaches the target temperature. Therefore, before using the vehicle in the future, it is necessary to give the vehicle sufficient heating time and charging time. Accordingly, the process for the vehicle to determine the start time of slow charging and heating is as follows: the vehicle determines the charging time of the vehicle based on the power of the vehicle's power battery. Then, based on the future use time of the vehicle, the vehicle subtracts the charging time and heating time to obtain the start time of slow charging and heating.

[0067] Among them, the charging time of the power battery can be determined based on the state of charge (SOC) of the power battery and the charging power of the charger, which is not limited in the embodiments of the present disclosure.

[0068] The solution provided in the embodiment of the present application determines the start time of slow charging heating according to the future usage time, heating time and charging time, to ensure that the power battery is heated to a suitable state before the vehicle is used in the future and the power battery is in sufficient power, thereby saving vehicle use time and improving vehicle use efficiency.

[0069] Method four, the vehicle can determine the start time of slow charging and heating based on the temperature of the vehicle's environment. For example, when the temperature of the vehicle's environment is low, the vehicle determines an earlier start time for slow charging and heating; when the temperature of the vehicle's environment is high, the vehicle determines a later start time for slow charging and heating. In the solution provided in the embodiment of the present application, since the temperature of the power battery will be affected by the ambient temperature, when the ambient temperature is low, the temperature of the power battery will gradually decrease and tend to the ambient temperature. By determining the start time of slow charging and heating according to the temperature of the vehicle's environment, it is beneficial to heat the power battery before the low temperature affects the performance of the power battery, thereby reducing the impact of low temperature on the performance of the power battery.

[0070] In some embodiments, when the temperature of the vehicle environment is lower than the preset ambient temperature and lasts for a preset time, the vehicle uses the end time of the preset time as the start time of slow charging and heating. The embodiment of the present application does not limit the preset ambient temperature and the preset time. That is, when the environment in which the vehicle is located continues to be low in temperature, when the duration of the low temperature reaches the preset duration, the vehicle determines that the current time is the start time of slow charging and heating, and starts to control the charger to heat the power battery. The solution provided in the embodiment of the present application will only heat the power battery when the external environment continues to be low in temperature. When the external environment occasionally has a low temperature and the duration is short, the impact on the power battery is small, and heating is not required, thereby saving the vehicle's operating consumption.

[0071] 203. When the property information of the power battery meets the first heating condition, the vehicle controls the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery.

[0072] In the embodiment of the present application, when the current time reaches the slow charging heating start time, the vehicle can determine whether to heat the power battery according to at least one of the property information of the power battery temperature, charging power and power. If the property information of the power battery meets the first heating condition, the vehicle determines that the power battery needs to be heated. Then, the vehicle controls the charger in the vehicle to use the power obtained from the charging pile to heat the power battery.

[0073] Wherein, the first heating condition includes at least one of the following:

[0074] The first item is that the lowest temperature among the temperatures of the multiple cells in the power battery is lower than the preset battery temperature. That is, when the lowest temperature among the temperatures of the multiple cells in the power battery is lower than the preset battery temperature, the vehicle controls the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery.

[0075] The second item is that the charging power of the power battery is less than the rated power. That is, when the charging power of the power battery is less than the rated power, the vehicle controls the charger in the vehicle to use the power obtained from the charging pile to heat the power battery.

[0076] The third item is that the power of the power battery is lower than the preset power. That is, when the power of the power battery is lower than the preset power, the vehicle controls the charger in the vehicle to use the power obtained from the charging pile to heat the power battery.

[0077] In some embodiments, when the power battery meets the heating condition, the configuration in the vehicle should also be in a state where the battery can be heated, and then the vehicle will heat the power battery. Accordingly, when the property information of the power battery meets the first heating condition and the configuration in the vehicle meets the second heating condition, the vehicle controls the charger in the vehicle to use the power obtained from the charging pile to heat the power battery. The configuration in the second heating condition vehicle supports heating the power battery.

[0078] Among them, the vehicle can be equipped with an internal control unit (IHU), a vehicle control unit (VCU), a data recorder (TBOX), a battery management system (BMS), a charger (CMDC) and a body management system (BCM). The charger includes an on-board charger (OBC), a DC converter (DCDC) and a power distribution unit (PDU). For example, see Figure 3 , Figure 3 It is a framework diagram of a power battery slow charging and heating system provided according to an embodiment of the present application.

[0079] After the user's vehicle is used, the slow charging gun is inserted. The slow charging gun inputs the current in the charging pile into the vehicle's charger so that the power battery in the vehicle can be slowly heated and slowly charged later.

[0080] Then, the charger detects that the CC signal and CP signal of the slow charging gun are normal, and outputs 12V wake-up power to the battery management system and the vehicle controller. That is, the charger sends a slow charging wake-up signal to the battery management system and the vehicle controller.

[0081] Then, the central control screen can be set with a soft switch to turn on the slow charging and heating function. After turning on the soft switch, you can set the turn-on time of the function, and the time can be set for the next week.

[0082] After receiving the instructions for heating on and slow charging heating start time from the central control screen, the data recorder records the slow charging heating start time. Then, within a preset time (e.g. 60 seconds) before the slow charging heating start time arrives, the data recorder wakes up the network in the vehicle to put the vehicle controller, battery management system and vehicle management system in the vehicle into working state.

[0083] The battery management system receives and memorizes the heating function activation status and slow charging heating start time settings of the central control screen. When the slow charging heating start time arrives, the battery management system detects whether all the following conditions are met: ① The battery management system detects a slow charging wake-up signal; ② The lowest power battery temperature detected by the battery management system is lower than the heating activation temperature; ③ The power battery is not in a slow charging state, but in standby mode. When all the above conditions are met, the battery management system sends a heating request instruction to the vehicle controller. After receiving the heating confirmation instruction from the vehicle controller, the battery management system closes the heating loop. That is, the battery management system sends the voltage and current of the heating request to the on-board charger (OBC) in the charger.

[0084] The vehicle controller detects whether all the following conditions are met: ① The vehicle is locked and powered off; ② The vehicle controller detects a slow charge wake-up signal; ③ The vehicle controller detects that the vehicle's charging system has no serious faults that affect charging; ④ The charger is in STANDBY MODE; ⑤ The heating request command sent by the battery management system is received and the power battery is in standby mode. When all the above conditions are met, the vehicle controller determines that the vehicle meets the heating conditions, and the vehicle controller sends a heating permission command to the battery management system, the on-board charger in the charger, and the body management system.

[0085] Then, after receiving the heating permission instruction from the vehicle controller, the charger starts working and controls the output according to the output voltage and output current requested by the battery management system.

[0086] The body management system sends the vehicle's power gear status and vehicle lock status to the vehicle controller. Upon receiving the heating start command from the vehicle controller, it outputs the heating breathing light to prompt the user that the vehicle is in the slow charging and heating state.

[0087] Before heating the power battery, the vehicle can determine at least one item of heating information such as the target temperature, heating power, and heating duration of the power battery, and then control the charger in the vehicle to use the power obtained from the charging pile to heat the power battery based on the at least one item of heating information. When the power battery reaches the target temperature or the heating cut-off temperature, the vehicle controls the charger to stop heating the power battery.

[0088] For example, see Figure 3If any of the following conditions is met, the power battery will stop being heated, or the slow charging heating function cannot be turned on.

[0089] For the central control screen, the central control screen has a soft switch to turn off the slow charging and heating function.

[0090] For the battery management system, when the battery management system detects that any of the following conditions are met, it stops heating the power battery, or the slow charging heating function cannot be turned on. For example: the battery management system receives that the switch state of the slow charging heating function on the central control screen is off; the battery management system monitors that the current temperature of the power battery is higher than the cut-off temperature of the power battery heating; the battery management system determines that the vehicle meets the slow charging conditions (for example, the current temperature of the power battery reaches the target temperature); the power battery has a serious fault.

[0091] For the vehicle controller, when any of the following conditions are met, the vehicle controller sends a heating pause command. For example: the vehicle is powered on; the vehicle's charging and heating system has a serious fault; the heating request received from the battery management system is to shut down.

[0092] For the charger, when any of the states detected by the charger is met, the charger stops slow charging output. For example: the charger has a serious fault; the input signal (CC signal, CP signal) of the slow charging gun is not detected.

[0093] For the slow charging gun, the vehicle is disconnected from the slow charging gun or the slow charging gun has no AC input.

[0094] For the data recorder, the data recorder did not receive the heating start instruction and start time setting; the data recorder had no network signal.

[0095] In some embodiments, after heating the power battery, the vehicle can perform slow charging on the power battery. Accordingly, when the vehicle meets the slow charging conditions, the vehicle controls the charger to stop heating the power battery and start charging the power battery. That is, when the temperature of the power battery reaches the temperature required for the slow charging conditions, the vehicle can stop heating the power battery and charge the power battery. This method can improve the charging efficiency, and the battery will also heat up during the charging process, which can also reduce the impact of low temperature on the performance of the power battery.

[0096] The embodiment of the present application provides a heating control method for a power battery. Before the vehicle is used, the charger in the vehicle is connected to an external charging pile through a slow charging gun. While ensuring that the power battery in the vehicle can be charged, the slow charging gun can also be used to achieve slow charging heating of the power battery. That is, when a slow charging wake-up signal is received, it is determined that the charger in the vehicle and the external charging pile have been successfully connected through the slow charging gun. In this case, the current time is obtained. When the current time reaches the slow charging heating start time, the property information of the power battery in the vehicle is obtained to determine whether the power battery reaches the first heating condition. Since the property information of the power battery includes at least one of the temperature, charging power and power of the power battery, it can accurately reflect the current state of the power battery, so that it can accurately determine whether the power battery needs to be heated. When it is determined that heating is required, the charger in the vehicle is controlled to use the power obtained from the charging pile to heat the power battery. This method not only reduces the impact of low temperature on the performance of the power battery, but also does not consume the vehicle's own electrical energy, thereby ensuring the vehicle's operating mileage. The power battery can be heated to a suitable temperature before the vehicle is used, saving vehicle use time and improving vehicle use efficiency.

[0097] Figure 4 is a block diagram of a heating control device for a power battery provided according to an embodiment of the present application. The heating control device for a power battery is used to execute the steps of the above-mentioned heating control method for a power battery, see Figure 4 , the heating control device of the power battery includes:

[0098] The first acquisition module 401 is used to acquire the current time when a slow charging wake-up signal is received. The slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through a slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun;

[0099] The second acquisition module 402 is used to acquire attribute information of the power battery in the vehicle when the current time reaches the slow charging heating start time, where the attribute information includes at least one of the temperature, charging power and power of the power battery;

[0100] The control module 403 is used to control the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery when the property information of the power battery meets the first heating condition.

[0101] In some embodiments, the second acquisition module 402 is configured to perform any of the following:

[0102] In response to a setting operation of a heating time of the power battery, the set heating time is used as a slow charging heating start time;

[0103] Based on the historical heating time of the power battery, the slow charging heating start time is determined, where the historical heating time is the heating time set by the vehicle manager within the historical time period;

[0104] The slow charging and heating start time is determined based on the future use time of the vehicle, where the future use time is the time when the vehicle is first started in the future time period;

[0105] Determine the start time of slow charging heating based on the temperature of the vehicle's environment.

[0106] In some embodiments, the second acquisition module 402 includes:

[0107] A detection unit, used to detect the current temperature of the power battery in real time;

[0108] A first determining unit, configured to determine a heating time of the power battery based on a current temperature of the power battery and a target temperature, wherein the target temperature is a minimum temperature to be satisfied when the power battery is charged or discharged at a rated power;

[0109] The second determining unit is used to determine the slow charging heating start time based on the future use time and heating time of the vehicle.

[0110] In some embodiments, the second determination unit is used to determine the charging time of the vehicle based on the power level of the vehicle's power battery; based on the future use time of the vehicle, the charging time and the heating time are subtracted to obtain the slow charging and heating start time.

[0111] In some embodiments, the second acquisition module 402 is used to use the end time of the preset time as the start time of slow charging heating when the temperature of the vehicle environment is lower than the preset ambient temperature and lasts for a preset time.

[0112] In some embodiments, the first heating condition includes at least one of the following:

[0113] The lowest temperature among the temperatures of multiple cells in the power battery is lower than the preset battery temperature;

[0114] The charging power of the power battery is less than the rated power;

[0115] The power battery's charge level is lower than the preset level.

[0116] In some embodiments, the control module 403 is used to control the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery when the property information of the power battery meets the first heating condition and the configuration in the vehicle meets the second heating condition.

[0117] In some embodiments, the control module 403 is further used to control the charger to stop heating the power battery and start charging the power battery when the vehicle meets the slow charging conditions.

[0118] The embodiment of the present application provides a heating control device for a power battery. Before the vehicle is used, the charger in the vehicle is connected to an external charging pile through a slow charging gun. While ensuring that the power battery in the vehicle can be charged, the slow charging gun can also be used to achieve slow charging and heating of the power battery. That is, when a slow charging wake-up signal is received, it is determined that the charger in the vehicle and the external charging pile have been successfully connected through the slow charging gun. In this case, the current time is obtained. When the current time reaches the slow charging heating start time, the property information of the power battery in the vehicle is obtained to determine whether the power battery reaches the first heating condition. Since the property information of the power battery includes at least one of the temperature, charging power and power of the power battery, it can accurately reflect the current state of the power battery, so that it can accurately determine whether the power battery needs to be heated. When it is determined that heating is required, the charger in the vehicle is controlled to use the power obtained from the charging pile to heat the power battery. This method not only reduces the impact of low temperature on the performance of the power battery, but also does not consume the vehicle's own electrical energy, thereby ensuring the vehicle's operating mileage. The power battery can be heated to a suitable temperature before the vehicle is used, saving vehicle use time and improving vehicle use efficiency.

[0119] It should be noted that: the power battery heating control device provided in the above embodiment only uses the division of the above functional modules as an example to illustrate when heating the power battery. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the power battery heating control device provided in the above embodiment and the power battery heating control method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0120] In the embodiments of the present application, the computer device can be configured as a terminal or a server. When the computer device is configured as a terminal, the terminal can be used as the execution subject to implement the technical solution provided in the embodiments of the present application. When the computer device is configured as a server, the server can be used as the execution subject to implement the technical solution provided in the embodiments of the present application. The technical solution provided in the present application can also be implemented through interaction between the terminal and the server. The embodiments of the present application are not limited to this.

[0121] Figure 5This is a block diagram of a terminal 500 provided according to an embodiment of the present application. The terminal 500 may be a portable mobile terminal, such as a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 player (Moving Picture Experts Group Audio Layer IV), a laptop computer or a desktop computer. The terminal 500 may also be referred to as a user device, a portable terminal, a laptop terminal, a desktop terminal or other names.

[0122] Typically, the terminal 500 includes a processor 501 and a memory 502 .

[0123] The processor 501 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 501 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 501 may also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 501 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 501 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0124] The memory 502 may include one or more computer-readable storage media, which may be non-transitory. The memory 502 may also include a high-speed random access memory and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 502 is used to store at least one computer program, which is used to be executed by the processor 501 to implement the heating control method of the power battery provided in the method embodiment of the present application.

[0125] In some embodiments, the terminal 500 may further optionally include: a peripheral device interface 503 and at least one peripheral device. The processor 501, the memory 502 and the peripheral device interface 503 may be connected via a bus or a signal line. Each peripheral device may be connected to the peripheral device interface 503 via a bus, a signal line or a circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 504, a display screen 505, a camera assembly 506, an audio circuit 507 and a power supply 508.

[0126] The peripheral device interface 503 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 501 and the memory 502. In some embodiments, the processor 501, the memory 502, and the peripheral device interface 503 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 501, the memory 502, and the peripheral device interface 503 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0127] The radio frequency circuit 504 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 504 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 504 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. In some embodiments, the radio frequency circuit 504 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The radio frequency circuit 504 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 504 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0128] The display screen 505 is used to display a UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 505 is a touch display screen, the display screen 505 also has the ability to collect touch signals on the surface or above the surface of the display screen 505. The touch signal can be input to the processor 501 as a control signal for processing. At this time, the display screen 505 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 505 can be one, set on the front panel of the terminal 500; in other embodiments, the display screen 505 can be at least two, respectively set on different surfaces of the terminal 500 or in a folding design; in other embodiments, the display screen 505 can be a flexible display screen, set on a curved surface or a folding surface of the terminal 500. Even, the display screen 505 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 505 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), etc.

[0129] The camera assembly 506 is used to capture images or videos. In some embodiments, the camera assembly 506 includes a front camera and a rear camera. Typically, the front camera is disposed on the front panel of the terminal, and the rear camera is disposed on the back of the terminal. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize the panoramic shooting and the VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 506 may also include a flash. The flash may be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0130] The audio circuit 507 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 501 for processing, or input them into the radio frequency circuit 504 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 500. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 501 or the radio frequency circuit 504 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 507 may also include a headphone jack.

[0131] The power supply 508 is used to power various components in the terminal 500. The power supply 508 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 508 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0132] In some embodiments, the terminal 500 further includes one or more sensors 509 , including but not limited to: an acceleration sensor 510 , a gyroscope sensor 511 , a pressure sensor 512 , an optical sensor 513 , and a proximity sensor 514 .

[0133] The acceleration sensor 510 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established by the terminal 500. For example, the acceleration sensor 510 can be used to detect the components of gravity acceleration on the three coordinate axes. The processor 501 can control the display screen 505 to display the user interface in a horizontal view or a vertical view according to the gravity acceleration signal collected by the acceleration sensor 510. The acceleration sensor 510 can also be used to collect game or user motion data.

[0134] The gyro sensor 511 can detect the body direction and rotation angle of the terminal 500, and the gyro sensor 511 can cooperate with the acceleration sensor 510 to collect the user's 3D actions on the terminal 500. The processor 501 can implement the following functions based on the data collected by the gyro sensor 511: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization during shooting, game control, and inertial navigation.

[0135] The pressure sensor 512 can be set on the side frame of the terminal 500 and / or the lower layer of the display screen 505. When the pressure sensor 512 is set on the side frame of the terminal 500, it can detect the user's holding signal of the terminal 500, and the processor 501 performs left and right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 512. When the pressure sensor 512 is set on the lower layer of the display screen 505, the processor 501 controls the operability controls on the UI interface according to the user's pressure operation on the display screen 505. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0136] The optical sensor 513 is used to collect the ambient light intensity. In one embodiment, the processor 501 can control the display brightness of the display screen 505 according to the ambient light intensity collected by the optical sensor 513. Specifically, when the ambient light intensity is high, the display brightness of the display screen 505 is increased; when the ambient light intensity is low, the display brightness of the display screen 505 is reduced. In another embodiment, the processor 501 can also dynamically adjust the shooting parameters of the camera component 506 according to the ambient light intensity collected by the optical sensor 513.

[0137] The proximity sensor 514, also called a distance sensor, is usually arranged on the front panel of the terminal 500. The proximity sensor 514 is used to collect the distance between the user and the front of the terminal 500. In one embodiment, when the proximity sensor 514 detects that the distance between the user and the front of the terminal 500 is gradually decreasing, the processor 501 controls the display screen 505 to switch from the screen-on state to the screen-off state; when the proximity sensor 514 detects that the distance between the user and the front of the terminal 500 is gradually increasing, the processor 501 controls the display screen 505 to switch from the screen-off state to the screen-on state.

[0138] Those skilled in the art will understand that Figure 5 The structure shown in the figure does not constitute a limitation on the terminal 500, and the terminal 500 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0139] Figure 6It is a structural diagram of a server provided according to an embodiment of the present application. The server 600 may have relatively large differences due to different configurations or performances, and may include one or more processors (Central Processing Units, CPU) 601 and one or more memories 602, wherein the memory 602 stores at least one computer program, and the at least one computer program is loaded and executed by the processor 601 to implement the heating control method of the power battery provided by the above-mentioned various method embodiments. Of course, the server 600 may also have components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output. The server 600 may also include other components for realizing device functions, which will not be repeated here.

[0140] The embodiment of the present application also provides a computer-readable storage medium, in which at least one computer program is stored, and the at least one computer program is loaded and executed by a processor of a computer device to implement the operation performed by the computer device in the heating control method of the power battery in the above embodiment. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0141] In some embodiments, the computer program involved in the embodiments of the present application may be deployed and executed on a computer device, or on multiple computer devices located at one location, or on multiple computer devices distributed at multiple locations and interconnected by a communication network. Multiple computer devices distributed at multiple locations and interconnected by a communication network may constitute a blockchain system.

[0142] The embodiment of the present application also provides a computer program product, including a computer program, which is stored in a computer-readable storage medium. A processor of a computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the heating control method of the power battery provided in the above various optional implementations.

[0143] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0144] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heating control method for a power battery, characterized in that: The method comprises: When a slow charging wake-up signal is received, the current time is obtained, wherein the slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through the slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun; When the current time reaches the slow charging heating start time, acquiring attribute information of the power battery in the vehicle, the attribute information including at least one of the temperature, charging power and power of the power battery; When the property information of the power battery satisfies a first heating condition, the charger in the vehicle is controlled to use the power obtained from the charging pile to heat the power battery.

2. The method according to claim 1, characterized in that The process of obtaining the slow charging heating start time includes any of the following: In response to a setting operation of a heating time of the power battery, taking the set heating time as the slow charging heating start time; Determining the slow charging heating start time based on the historical heating time of the power battery, where the historical heating time is the heating time set by the manager of the vehicle within a historical time period; Determining the slow charging and heating start time based on the future use time of the vehicle, where the future use time is the time when the vehicle is started for the first time in a future time period; The slow charging heating start time is determined based on the temperature of the environment in which the vehicle is located.

3. The method according to claim 2, characterized in that The determining the slow charging heating start time based on the future use time of the vehicle includes: Detecting the current temperature of the power battery in real time; Determining a heating time of the power battery based on a current temperature of the power battery and a target temperature, wherein the target temperature is a minimum temperature to be met when the power battery is charged or discharged at a rated power; The slow charging heating start time is determined based on the future use time of the vehicle and the heating duration.

4. The method according to claim 3, characterized in that The determining the slow charging heating start time based on the future use time of the vehicle and the heating duration includes: Determining a charging time of the vehicle based on the power level of the power battery of the vehicle; The slow charging and heating start time is obtained by subtracting the charging time and the heating time from the future use time of the vehicle.

5. The method according to claim 2, characterized in that: The determining the slow charging heating start time based on the temperature of the environment in which the vehicle is located includes: When the temperature of the environment of the vehicle is lower than the preset ambient temperature and lasts for a preset time, the end time of the preset time is used as the start time of the slow charging heating.

6. The method according to claim 1, characterized in that The first heating condition includes at least one of the following: The lowest temperature among the temperatures of the multiple cells in the power battery is lower than the preset battery temperature; The charging power of the power battery is less than the rated power; The power level of the power battery is lower than a preset power level.

7. The method according to claim 1, characterized in that When the property information of the power battery satisfies the first heating condition, controlling the charger in the vehicle to use the power obtained from the charging pile to heat the power battery includes: When the attribute information of the power battery satisfies the first heating condition and the configuration in the vehicle satisfies the second heating condition, the charger in the vehicle is controlled to use the electricity obtained from the charging pile to heat the power battery, and the configuration in the vehicle supports heating the power battery under the second heating condition.

8. The method according to claim 1, characterized in that The method further comprises: When the vehicle meets the slow charging condition, the charger is controlled to stop heating the power battery and start charging the power battery.

9. A heating control device for a power battery, characterized in that: The device comprises: A first acquisition module is used to acquire the current time when a slow charging wake-up signal is received, wherein the slow charging wake-up signal is used to indicate that the charger in the vehicle is connected to the external charging pile through a slow charging gun, and the charger can obtain power from the charging pile through the slow charging gun; A second acquisition module is used to acquire attribute information of the power battery in the vehicle when the current time reaches the slow charging heating start time, wherein the attribute information includes at least one of the temperature, charging power and power of the power battery; The control module is used to control the charger in the vehicle to use the electricity obtained from the charging pile to heat the power battery when the property information of the power battery meets the first heating condition.

10. A computer device, characterized in that: The computer device includes a processor and a memory, the memory is used to store at least one computer program, and the at least one computer program is loaded by the processor and executed by the heating control method of the power battery according to any one of claims 1 to 8.

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