Battery charging temperature control method, device, electronic equipment and medium

Abstract

The present application provides a battery charging temperature control method, device, electronic device and medium, the method comprising: obtaining vehicle position information of a target vehicle, vehicle-side power battery information, and a target charging mode selected by a user for the target vehicle in the cloud; the vehicle position information is used to determine target weather information; the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle and sends them to a vehicle-side battery controller; when a charging pile connection is detected, the vehicle-side battery controller determines that heating is required based on the current power battery status, sends a heating request, determines the target heating mode to heat the power battery according to the type of heating request and the function of the charging pile, and ends the heating when the power battery status meets the heating end condition, and controls the power battery of the target vehicle to charge according to the charging temperature control strategy parameters to ensure that the power battery temperature is as close to a reasonable temperature range as possible.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to a battery charging temperature control method, device, electronic device and medium. Background Art

[0002] As the scale of the new energy vehicle market continues to expand and the charging rate of power batteries has increased significantly, people's anxiety about recharging new energy vehicles has gradually decreased, and they are paying more and more attention to the service life of batteries.

[0003] When the charging rate of the power battery is increased, the temperature of the power battery during charging will also increase. When the temperature is too low or too high, it will affect the performance of the power battery. If it is not properly controlled, it may even cause a safety accident. Therefore, it is very necessary to control the charging temperature of the power battery within a reasonable temperature range. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a battery charging temperature control method, device, electronic device and medium, which can ensure that the temperature of the power battery is as close to a reasonable temperature range as possible, thereby extending the life of the battery.

[0005] An embodiment of the present application provides a battery charging temperature control method, comprising:

[0006] The cloud obtains the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment in which the target vehicle is located;

[0007] The cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, and sends the charging temperature control strategy parameters to the vehicle-side battery controller;

[0008] When the charging pile connection is detected, the vehicle-side battery controller sends a heating request when it determines that heating is required based on the current power battery status; the types of heating requests include pulse heating requests and ordinary heating requests;

[0009] The vehicle-side battery controller determines a target heating mode according to the type of the heating request and the function of the charging pile, and heats the power battery according to the target heating mode until the state of the power battery meets the heating end condition;

[0010] The power battery of the target vehicle is controlled to be charged according to the charging temperature control strategy parameters to control the temperature of the power battery during charging.

[0011] In some embodiments, the battery charging temperature control method further includes:

[0012] When the charging pile connection is detected, the vehicle-side battery controller determines that heating is not required based on the current power battery status and sends a charging request to the charging pile;

[0013] The vehicle-side battery controller responds to the charging request and controls the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process.

[0014] In some embodiments, in the battery charging temperature control method, the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, including:

[0015] Determine a target ambient temperature range of the environment where the target vehicle is located according to weather information matched with the vehicle location information; the target ambient temperature range corresponds to a target ambient temperature tag;

[0016] Obtaining target historical charging data of a similar vehicle model matching the target ambient temperature tag in the target charging mode, and extracting a relationship between a power battery temperature and a charging current of the target vehicle based on the target historical charging data;

[0017] Determine the starting working condition of charging according to the vehicle-side power battery information, and determine the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting working condition based on the relationship between the power battery temperature and the charging current of the target vehicle;

[0018] Based on the temperature rise rates and starting operating conditions corresponding to the different charging current intervals, the charging temperature control strategy parameters of the target vehicle are determined.

[0019] In some embodiments, in the battery charging temperature control method, when the charging pile connection is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and sends a heating request, including:

[0020] When the connection of the charging pile is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and determines whether the current power battery state satisfies multiple pulse heating request conditions at the same time; the multiple pulse heating request conditions include: the highest temperature in the current power battery state is less than the first temperature setting threshold, and the lowest temperature is greater than the second temperature setting threshold; the lowest cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest cell voltage is lower than the second voltage setting threshold; the lowest cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest cell SOC is lower than the second SOC setting threshold;

[0021] If yes, a pulse heating request is sent to the charging pile;

[0022] If not, determine whether the normal heating request conditions are met;

[0023] If yes, a normal heating request is sent to the charging pile.

[0024] In some embodiments, in the battery charging temperature control method, the vehicle-side battery controller determines the target heating mode according to the type of the heating request and the function of the charging pile, including:

[0025] When the type of the heating request is a pulse heating request and the charging pile supports a pulse heating function, determining that the target heating mode is a pulse heating mode;

[0026] When the type of the heating request is a common heating request, and / or the charging pile does not support a pulse heating function, the target heating mode is determined to be a common heating mode.

[0027] In some embodiments, in the battery charging temperature control method, heating the power battery according to the target heating mode includes:

[0028] When the target heating mode is the pulse heating mode, the charging pile sends the pulse heating capability parameters to the vehicle-side battery controller;

[0029] The vehicle-side battery controller combines the pulse heating capacity parameters of the charging pile to output the pulse heating parameters of the pulse heating mode, and starts pulse heating of the power battery; the pulse heating parameters include: pulse heating request voltage, pulse heating request current, and pulse heating frequency;

[0030] Among them, the vehicle-side battery controller determines an actual pulse heating request current and judges whether the actual pulse heating request current is greater than the pulse current upper limit in the pulse heating capacity parameter. If so, the output pulse heating request current is the pulse current upper limit; if not, the actual pulse heating request current is output.

[0031] In some embodiments, in the battery charging temperature control method, heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition ends, including:

[0032] In the process of pulse heating the power battery in the pulse heating mode, multiple monitoring parameters of the power battery are monitored in real time; the monitoring parameters include: the highest single cell voltage, the lowest single cell voltage, the difference between the pulse heating charging current and the pulse heating discharging current;

[0033] When it is detected that any monitoring parameter triggers the alarm threshold, the pulse heating parameter is limited;

[0034] When any parameter is detected to trigger a fault threshold, the interaction with the charging pile is terminated.

[0035] In some embodiments, in the battery charging temperature control method, heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition ends, includes:

[0036] When the target heating mode is the normal heating mode, the maximum charging capacity parameter of the charging pile is obtained, and the heating end temperature is determined according to the maximum charging capacity parameter of the charging pile; wherein, the larger the maximum charging capacity parameter is, the lower the heating end temperature is;

[0037] The first real-time temperature of the power battery during the heating process is monitored, and when the first real-time temperature of the power battery is greater than the heating end temperature, the heating is ended and the process is switched to the charging stage.

[0038] In some embodiments, in the battery charging temperature control method, controlling the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging includes:

[0039] The battery controller sends a charging request current to the charging pile according to the current power battery status, so as to charge according to the charging request current;

[0040] Monitoring a second real-time temperature of the power battery during the charging process, and based on the current limiting condition met by the second real-time temperature, multiplying the sent charging request current by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging; different current limiting conditions correspond to different current limiting coefficients;

[0041] During the current limiting charging process, if the battery controller determines that the real-time power battery allowable charging current is less than the charging request current after current limiting, the charging request current is the power battery allowable charging current, and the current limiting coefficient is restored to 1.

[0042] In some embodiments, in the battery charging temperature control method, based on the current limiting condition met by the second real-time temperature, the sent charging request current is multiplied by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging, including:

[0043] When the second real-time temperature of the monitored power battery exceeds the lower limit of the preset temperature range, the sent charging request current is multiplied by the first current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current for current limiting charging;

[0044] If after reducing the charging current, the second real-time temperature of the power battery is still monitored to exceed the lower limit of the preset temperature range and the duration exceeds the preset duration threshold, the sent charging request current is multiplied by the second current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current twice for current limiting charging; the second current limiting coefficient is less than the first current limiting coefficient;

[0045] When the difference between the second real-time temperature of the power battery and the upper limit of the preset temperature range is greater than the preset current limiting threshold, the charging request current sent is multiplied by the third current limiting coefficient to perform current limiting charging, and thermal management is turned on for cooling.

[0046] In some embodiments, a battery charging temperature control device is further provided, the device comprising:

[0047] An acquisition module is used to enable the cloud to acquire the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment in which the target vehicle is located;

[0048] A first determination module is used to enable the cloud to determine the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, and send the charging temperature control strategy parameters to the vehicle-side battery controller;

[0049] A judgment module, which is used to send a heating request when the vehicle-side battery controller determines that heating is required based on the current power battery state after detecting that the charging pile is connected; the types of the heating request include pulse heating request and ordinary heating request;

[0050] A second determination module is used to enable the vehicle-side battery controller to determine a target heating mode according to the type of the heating request and the function of the charging pile, and heat the power battery according to the target heating mode until the state of the power battery meets the heating end condition;

[0051] The control module is used to control the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging.

[0052] In some embodiments, an electronic device is also provided, including: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the battery charging temperature control method are performed.

[0053] In some embodiments, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the battery charging temperature control method are executed.

[0054] In an embodiment of the present application, a battery charging temperature control method, device, electronic device and medium are provided, the method comprising obtaining vehicle position information of a target vehicle, vehicle-side power battery information, and a target charging mode selected by a user for the target vehicle in the cloud; the vehicle position information is used to determine the target weather information of the environment in which the target vehicle is located; the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on historical charging data of similar vehicles, the vehicle-side power battery information, the target charging mode and the target weather information, and sends the charging temperature control strategy parameters to the vehicle-side battery controller; when the charging pile is detected to be connected, the vehicle-side battery controller sends a heating request when it determines that heating is required based on the current power battery status; the types of heating requests include pulse heating requests and ordinary heating requests; the vehicle-side battery controller determines the target heating mode according to the type of heating request and the function of the charging pile, and The thermal mode heats the power battery until the state of the power battery meets the heating end condition; the power battery of the target vehicle is controlled to be charged according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process; thereby, the mode can be switched according to the current state of the power battery and the state of the charging pile. When the charging pile supports pulse heating, it can be controlled to enter the pulse heating mode to quickly heat the power battery; when the charging pile does not support pulse heating, heating is performed by controlling the vehicle-side thermal management, and switching to the charging mode within a reasonable temperature range according to the temperature state of the battery to charge the power battery; during the power battery charging process, the power battery control parameters are optimized in combination with the environment and historical charging data to ensure that the current parameters match the vehicle state, so as to control the temperature within a reasonable temperature range by controlling the charging request current and the activation of the thermal management function, and to reduce power consumption as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A flow chart of a battery charging temperature control method according to an embodiment of the present application is shown;

[0057] Figure 2 A flow chart of a method for determining charging temperature control strategy parameters of a power battery of a target vehicle according to an embodiment of the present application is shown;

[0058] Figure 3 A flow chart of a method for sending a heating request according to an embodiment of the present application is shown;

[0059] Figure 4 A flow chart of a method for heating a power battery according to a target heating mode according to an embodiment of the present application is shown;

[0060] Figure 5 A flow chart of another method for heating a power battery according to a target heating mode according to an embodiment of the present application is shown;

[0061] Figure 6 A flow chart of a method for controlling the charging of a power battery of a target vehicle according to the charging temperature control strategy parameters according to an embodiment of the present application is shown;

[0062] Figure 7 A schematic diagram of the structure of the battery charging temperature control device according to an embodiment of the present application is shown;

[0063] Figure 8 A schematic structural diagram of an electronic device described in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0064] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0065] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0066] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0067] As the scale of the new energy vehicle market continues to expand and the charging rate of power batteries has increased significantly, people's anxiety about recharging new energy vehicles has gradually decreased, and they are paying more and more attention to the service life of batteries.

[0068] When the charging rate of the power battery is increased, the temperature of the power battery during charging will also increase. When the temperature is too low or too high, it will affect the performance of the power battery. If it is not properly controlled, it may even cause a safety accident. Therefore, it is very necessary to control the charging temperature of the power battery within a reasonable temperature range.

[0069] Based on this, in an embodiment of the present application, a battery charging temperature control method, device, electronic device and medium are provided, the method comprising obtaining vehicle position information of a target vehicle, vehicle-side power battery information, and a target charging mode selected by a user for the target vehicle in the cloud; the vehicle position information is used to determine the target weather information of the environment in which the target vehicle is located; the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on historical charging data of similar vehicles, the vehicle-side power battery information, the target charging mode and the target weather information, and sends the charging temperature control strategy parameters to the vehicle-side battery controller; when the charging pile is detected to be connected, the vehicle-side battery controller sends a heating request when it determines that heating is required based on the current power battery status; the types of heating requests include pulse heating requests and ordinary heating requests; the vehicle-side battery controller determines the target heating mode according to the type of heating request and the function of the charging pile, and The power battery is heated in a standard heating mode until the state of the power battery meets the heating end condition; the power battery of the target vehicle is controlled to be charged according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process; thereby, the mode can be switched according to the current state of the power battery and the state of the charging pile. When the charging pile supports pulse heating, it can be controlled to enter the pulse heating mode to quickly heat the power battery; when the charging pile does not support pulse heating, heating is performed by controlling the vehicle-side thermal management, and switching to the charging mode within a reasonable temperature range according to the temperature state of the battery to charge the power battery; during the power battery charging process, the power battery control parameters are optimized in combination with the environment and historical charging data to ensure that the current parameters match the vehicle state, so as to control the temperature within a reasonable temperature range by controlling the charging request current and the activation of the thermal management function, and to reduce power consumption as much as possible.

[0070] Please refer to Figure 1 , Figure 1 1 shows a flow chart of a battery charging temperature control method according to an embodiment of the present application; Figure 1 As shown, the method includes the following steps S101-S105:

[0071] S101, the cloud obtains vehicle location information of the target vehicle, vehicle-side power battery information, and a target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine target weather information of the environment in which the target vehicle is located;

[0072] S102, the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, and sends the charging temperature control strategy parameters to the vehicle-side battery controller;

[0073] S103, when the charging pile connection is detected, the vehicle-side battery controller sends a heating request when it determines that heating is required based on the current power battery state; the types of heating requests include pulse heating requests and ordinary heating requests;

[0074] S104, the vehicle-side battery controller determines a target heating mode according to the type of the heating request and the function of the charging pile, and heats the power battery according to the target heating mode until the state of the power battery meets the heating end condition;

[0075] S105 . Controlling the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging.

[0076] In step S101, the cloud obtains the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment in which the target vehicle is located.

[0077] Specifically, when the power battery is detected to be low, the vehicle system or mobile APP will prompt the user to charge. The user can choose whether to charge through the mobile APP or the vehicle interface, and when choosing to charge, further select the charging mode; the charging modes include fast charging, slow charging, smart charging, charging for 5 hours, automatic stop when fully charged, etc.

[0078] Afterwards, the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle are obtained. After obtaining the above information, the information and the relevant information of the vehicle-side power battery are uploaded to the cloud.

[0079] The conditions for judging that the power battery power is low include, but are not limited to: the power battery SOC is lower than a threshold set by the user, and the power battery cell voltage is lower than a set threshold.

[0080] The vehicle-side power battery information includes but is not limited to: the power battery's state of charge SOC, the power battery's temperature, the power battery's single cell voltage, the power battery's health status, and the battery coolant inlet temperature.

[0081] Vehicle location information is used to characterize the location of the target vehicle; the vehicle location information can be the latitude and longitude information of the target vehicle obtained in real time through the GPS system, or the latitude and longitude can be converted into a specific geographic location description (such as street name, city area, etc.) in combination with a map service API.

[0082] According to the user's charging selection, the parameters of this charging are analyzed in combination with the historical charging data of similar models. When the cloud obtains the user's charging mode selection, it obtains the local weather information based on the current location of the vehicle. The charging parameters of this charging are analyzed in combination with the current power battery SOC, power battery temperature, power battery single cell voltage, and power battery health status.

[0083] Please refer to Figure 2 , Figure 2 A flow chart of a method for determining the charging temperature control strategy parameters of the power battery of a target vehicle according to an embodiment of the present application is shown; the cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, including the following steps S201-S204:

[0084] S201, determining a target ambient temperature range of an environment where a target vehicle is located according to weather information matched with vehicle location information; the target ambient temperature range corresponds to a target ambient temperature label;

[0085] S202, obtaining target historical charging data of a similar vehicle model that matches the target ambient temperature tag in the target charging mode, and extracting a relationship between a power battery temperature and a charging current of a target vehicle based on the target historical charging data;

[0086] S203, determining the starting working condition of charging according to the vehicle-side power battery information, and determining the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting working condition based on the relationship between the power battery temperature and the charging current of the target vehicle;

[0087] S204: Determine charging temperature control strategy parameters of the target vehicle based on the temperature rise rates and starting operating conditions corresponding to the different charging current intervals.

[0088] Obtain target historical charging data of similar vehicle models that match the target ambient temperature label under the target charging mode, and extract the relationship between the power battery temperature and the charging current of the target vehicle based on the target historical charging data. Exemplarily, according to the temperature label of the vehicle, switch the historical charging data of similar vehicle models in the cloud under the target charging mode, and extract a curve graph of the power battery temperature and the charging current through the database.

[0089] Specifically, first determine the data screening conditions, including: specific vehicle models, specific target charging modes (such as fast charging), and specific ambient temperature ranges (such as -10°C to 0°C); then filter out historical charging data of similar vehicle models that meet the above data screening conditions from the cloud database or data center; these data should contain detailed records of the charging process, such as timestamps, charging current, battery temperature, battery voltage, SOC (remaining battery capacity), etc. Then, through statistical or machine learning methods, analyze the relationship between power battery temperature and charging current, draw a curve chart of power battery temperature over time (or charging progress), and simultaneously display the charging current value at the corresponding time point, so as to determine the following analysis results: how the charging current of the target vehicle is adjusted as the battery temperature changes under different ambient temperatures, and the impact of this adjustment on charging efficiency and battery health.

[0090] In the step S203, the starting charging condition is determined according to the vehicle-side power battery information, and the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting condition is determined based on the relationship between the power battery temperature and the charging current of the target vehicle; specifically, based on the SOC of the power battery, the temperature of the power battery, the power battery cell voltage, the power battery health status and other information as the charging start information, a simulation is performed in the cloud to determine the temperature rise rate corresponding to different charging current intervals of the power battery under the starting condition.

[0091] Establish a clear correspondence between different charging current ranges and corresponding temperature rise rates. This helps to select the appropriate charging current range according to the target temperature rise rate during the charging process.

[0092] The cloud sends the charging temperature control strategy parameters to the vehicle, and the vehicle controls the charging according to the current vehicle status and the status of the charging equipment.

[0093] In step S103, when the connection of the charging pile is detected, the vehicle-side battery controller sends a heating request when it determines that heating is needed based on the current power battery status; the types of heating requests include pulse heating requests and ordinary heating requests.

[0094] Specifically, a heating request is sent to the vehicle controller.

[0095] As the core component of battery protection and management, BMS uses a series of sensors and algorithms to perform real-time detection of key parameters of the power battery, such as voltage, current, and temperature, and determines the battery's working status and whether heating is required based on these parameters.

[0096] For example, the basis for heating judgment is as follows: BMS will monitor the temperature of the power battery in real time. In a low temperature environment, especially when the battery temperature is lower than its normal operating range (generally 0-40°C, the optimal operating temperature is 25°C), BMS will determine that the battery needs to be heated; in addition to temperature, BMS will also comprehensively evaluate the battery performance based on parameters such as the battery's SOC (state of charge) and SOH (state of performance). If the battery performance deteriorates due to low temperature, such as slower charging speed and reduced discharge capacity, BMS will also trigger the heating mechanism.

[0097] In the embodiment of the present application, preferably, the judgment is mainly based on the current power battery temperature.

[0098] When the charging pile connection is detected, the vehicle-side battery controller determines that heating is not required based on the current power battery status and sends a charging request to the charging pile;

[0099] The vehicle-side battery controller responds to the charging request and controls the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process.

[0100] That is to say, when the charging gun is detected to be connected, the vehicle-side battery controller sends a corresponding heating request or charging request according to the current power battery status, and switches the current charging mode in combination with the functions supported by the charging pile.

[0101] In the embodiment of the present application, the type of the heating request is determined based on the following method.

[0102] Please refer to Figure 3 , Figure 3 The flowchart of the method for sending a heating request according to an embodiment of the present application is shown; when the charging pile connection is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and sends a heating request, including the following steps S301-S304:

[0103] S301. When the vehicle-side battery controller determines that heating is required based on the current power battery state after detecting the connection of the charging pile, it determines whether the current power battery state satisfies multiple pulse heating request conditions at the same time; the multiple pulse heating request conditions include: the highest temperature in the current power battery state is less than the first temperature setting threshold, and the lowest temperature is greater than the second temperature setting threshold; the lowest cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest cell voltage is lower than the second voltage setting threshold; the lowest cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest cell SOC is lower than the second SOC setting threshold;

[0104] S302: If yes, send a pulse heating request to the charging pile;

[0105] S303, if not, determine whether the normal heating request condition is met;

[0106] S304: If yes, send a normal heating request to the charging pile.

[0107] The common heating request is a charging heating request, and heating is achieved through the charging process.

[0108] In the battery charging temperature control method described in some embodiments, the vehicle-side battery controller determines the target heating mode according to the type of the heating request and the function of the charging pile, including:

[0109] When the type of the heating request is a pulse heating request and the charging pile supports a pulse heating function, determining that the target heating mode is a pulse heating mode;

[0110] When the type of the heating request is a common heating request, and / or the charging pile does not support a pulse heating function, the target heating mode is determined to be a common heating mode.

[0111] That is to say, if there is a pulse heating request on the vehicle side and the charging pile supports pulse heating, the power battery will be heated according to the pulse heating process.

[0112] In step S104, the vehicle-side battery controller determines the target heating mode according to the type of the heating request and the function of the charging pile, and heats the power battery according to the target heating mode until the state of the power battery meets the heating end condition.

[0113] The power battery is heated according to the target heating mode. Specifically, the power battery is heated by charging, and the charging mode is a pulse heating mode or a normal heating mode.

[0114] In the battery charging temperature control method described, please refer to Figure 4 , Figure 4 A flow chart of a method for heating a power battery according to a target heating mode according to an embodiment of the present application is shown. Specifically, the method for heating a power battery according to the target heating mode includes the following steps S401-S403:

[0115] S401: When the target heating mode is the pulse heating mode, the charging pile sends the pulse heating capability parameter to the vehicle-side battery controller;

[0116] S402, the vehicle-side battery controller outputs pulse heating parameters of the pulse heating mode in combination with the pulse heating capacity parameters of the charging pile, and starts pulse heating of the power battery; the pulse heating parameters include: pulse heating request voltage, pulse heating request current, and pulse heating frequency;

[0117] S403, wherein the vehicle-side battery controller determines an actual pulse heating request current, and determines whether the actual pulse heating request current is greater than the pulse current upper limit in the pulse heating capacity parameter. If so, the output pulse heating request current is the pulse current upper limit; if not, the actual pulse heating request current is output.

[0118] That is to say, the vehicle-side battery controller will determine whether the actual pulse heating request current exceeds the capacity of the charging pile, effectively preventing damage to the charging pile due to excessive current, and enhancing the safety of the entire charging process. By automatically adjusting the pulse heating request current to a safe range, it allows electric vehicles to flexibly match and interoperate with charging piles of different models, while also protecting the battery and charging pile from damage caused by excessive current.

[0119] In the battery charging temperature control method described in the embodiment of the present application, heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition is terminated, including:

[0120] In the process of pulse heating the power battery in the pulse heating mode, multiple monitoring parameters of the power battery are monitored in real time; the monitoring parameters include: the highest single cell voltage, the lowest single cell voltage, the difference between the pulse heating charging current and the pulse heating discharging current;

[0121] When it is detected that any monitoring parameter triggers the alarm threshold, the pulse heating parameter is limited;

[0122] When any parameter is detected to trigger a fault threshold, the interaction with the charging pile is terminated.

[0123] During the pulse heating process of the power battery in pulse heating mode, multiple monitoring parameters are monitored in real time, and alarm thresholds and fault thresholds are set. This has multiple advantages such as improving safety, enhancing system stability, optimizing battery performance, improving maintenance efficiency, and supporting decision-making with data.

[0124] In the embodiments of the present application, the pulse heating parameters include but are not limited to pulse charging duration, pulse discharging duration, maximum pulse charging current, maximum pulse discharging current, maximum allowable voltage value of the single cell voltage in pulse heating mode, minimum allowable voltage value of the single cell voltage in pulse heating mode, total pulse heating duration, maximum temperature limit of pulse heating, etc.

[0125] Based on this, in an embodiment of the present application, when the target heating mode is a pulse heating mode, the heating end condition is at least one of the following: reaching any parameter among the preset pulse charging duration, the preset pulse discharging duration, the preset total pulse heating duration, the highest single cell voltage, the lowest single cell voltage, the difference between the pulse heating charging current and the pulse heating discharging current to trigger the fault threshold.

[0126] The pulse heating process is fully described below.

[0127] When the charging gun connection is detected, the vehicle-side battery controller sends a corresponding heating request or charging request according to the current power battery status, and switches the current charging mode in combination with the functions supported by the charging pile; if there is a pulse heating request on the vehicle side and the charging pile supports pulse heating, the power battery is heated according to the pulse heating process; specifically, the following steps A1-A7 are included:

[0128] A1. When the charging gun is detected to be connected, determine whether to heat or charge according to the current status of the power battery;

[0129] A2. If the current temperature, voltage and state of charge of the power battery meet the pulse heating request conditions, a pulse heating request is sent. The specific judgment conditions are as follows:

[0130] a. The maximum temperature in the current power battery state is less than the first temperature setting threshold, and the minimum temperature is greater than the second temperature setting threshold;

[0131] b. The lowest single cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest single cell voltage is lower than the second voltage setting threshold;

[0132] c. The lowest single cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest single cell SOC is lower than the second SOC setting threshold;

[0133] When the above conditions a, b, and c are met at the same time, the power battery is allowed to be pulse heated;

[0134] A3. Receive the protocol number of the charging pile. When the charger supports the pulse heating function, the battery controller interacts with the charging pile according to the pulse heating process;

[0135] A4. The battery controller sends the pulse heating related parameters to the charging pile. The charging pile determines whether the pulse heating parameters meet the conditions. If the conditions are met, the charging pile sends the pulse heating capacity parameters to the vehicle-side battery controller.

[0136] Pulse heating parameters include but are not limited to pulse charging duration, pulse discharging duration, maximum pulse charging current, maximum pulse discharging current, maximum allowable voltage value of single cell voltage in pulse heating mode, minimum allowable voltage value of single cell voltage in pulse heating mode, total pulse heating duration, maximum temperature limit of pulse heating, etc.;

[0137] A5. The battery controller combines the pulse heating capability of the charging pile to output the corresponding pulse heating request voltage, pulse heating request current, and pulse heating frequency, and starts pulse heating of the power battery;

[0138] The pulse heating request current includes the allowed pulse charging current limit and pulse discharging current limit in the current state; the pulse heating frequency includes the allowed single pulse charging time and single pulse discharging time in the current state.

[0139] If the current pulse heating request current is greater than the charging pile capacity, it is sent according to the charging pile capacity as the upper limit; when the pulse heating request current is less than the charging pile capacity, it is sent according to the actual request current;

[0140] A6. During the pulse heating process, the highest single cell voltage, the lowest single cell voltage, and the difference between the pulse heating charging current and the discharge current are monitored in real time. When any parameter is detected to trigger the alarm threshold, the request parameter sent is limited. When any parameter is detected to trigger the fault threshold, the pulse heating request is cleared to 0, ending the interaction with the charging pile.

[0141] A7. When the power battery temperature reaches the pulse heating end condition during the pulse heating process, the pulse heating process ends, jumps to the normal charging stage, and starts the corresponding charging temperature control strategy.

[0142] In some embodiments, please refer to Figure 5 , Figure 5 A flow chart of another method for heating a power battery according to a target heating mode according to an embodiment of the present application is shown; specifically, in the battery charging temperature control method, the power battery is heated according to the target heating mode until the state of the power battery meets the heating end condition, and the heating is ended, including the following steps S501-S502:

[0143] S501. When the target heating mode is the common heating mode, obtaining a maximum charging capacity parameter of the charging pile, and determining a heating end temperature according to the maximum charging capacity parameter of the charging pile; wherein the larger the maximum charging capacity parameter, the lower the heating end temperature;

[0144] S502, monitoring a first real-time temperature of the power battery during the heating process, and when the first real-time temperature of the power battery is greater than the heating end temperature, ending the heating and jumping to the charging stage.

[0145] That is to say, when it is detected that the charging gun is connected, the power battery needs to be heated, but there is no pulse heating request on the vehicle side or the pile side does not support the pulse heating function, it switches to the normal heating process and starts the corresponding control strategy.

[0146] For details, please refer to the following steps B1-B3:

[0147] B1. If the charging gun is detected to be connected, if any of the following conditions is met, the pulse heating request is set to 0 and the normal heating request is set to 1;

[0148] a. The power battery does not meet the pulse heating conditions, but meets the normal heating conditions;

[0149] b. The power battery meets the pulse heating conditions, but the charging pile does not support the pulse heating function.

[0150] B2. When the normal heating request is set to 1, normal interaction is started with the charging pile to obtain the maximum charging capacity of the charging pile, and the heating end temperature is determined according to the capacity of the charging pile;

[0151] If the maximum capacity of the charging pile is low, a higher value is selected for the heating end temperature;

[0152] If the maximum capacity of the charging pile is higher, the heating end temperature can be appropriately lowered.

[0153] B3. According to the cloud data analysis results in step B2, the real-time temperature of the power battery is compared with the heating end temperature sent from the cloud. When the real-time temperature of the power battery is greater than the heating end temperature, the heating process is terminated and the process jumps to the charging stage.

[0154] In the step S105, the power battery of the target vehicle is controlled to be charged according to the charging temperature control strategy parameters to control the temperature of the power battery during charging.

[0155] Please refer to Figure 6 , Figure 6A flow chart of a method for controlling the charging of a power battery of a target vehicle according to the charging temperature control strategy parameters in an embodiment of the present application is shown; the method for controlling the charging of a power battery of a target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging includes the following steps S601-S603:

[0156] S601, the battery controller sends a charging request current to the charging pile according to the current power battery state, so as to charge according to the charging request current;

[0157] S602, monitoring a second real-time temperature of the power battery during charging, and based on the current limiting condition met by the second real-time temperature, multiplying the sent charging request current by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameters to perform current limiting charging; different current limiting conditions correspond to different current limiting coefficients;

[0158] S603: During the current-limited charging process, if the battery controller determines that the real-time allowed charging current of the power battery is less than the charging request current after current limiting, the charging request current is the allowed charging current of the power battery, and the current limiting coefficient is restored to 1.

[0159] That is to say, in the embodiment of the present application, the charging temperature control strategy parameters include different current limiting coefficients corresponding to different current limiting conditions.

[0160] Specifically, based on the current limiting condition met by the second real-time temperature, the sent charging request current is multiplied by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging, including:

[0161] When the second real-time temperature of the monitored power battery exceeds the lower limit of the preset temperature range, the sent charging request current is multiplied by the first current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current for current limiting charging;

[0162] If after reducing the charging current, the second real-time temperature of the power battery is still monitored to exceed the lower limit of the preset temperature range and the duration exceeds the preset duration threshold, the sent charging request current is multiplied by the second current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current twice for current limiting charging; the second current limiting coefficient is less than the first current limiting coefficient;

[0163] When the difference between the second real-time temperature of the power battery and the upper limit of the preset temperature range is greater than the preset current limiting threshold, the charging request current sent is multiplied by the third current limiting coefficient to perform current limiting charging, and thermal management is turned on for cooling.

[0164] That is to say, when the power battery is being charged, the temperature of the power battery will rise accordingly. The battery controller starts the corresponding control strategy according to the real-time temperature of the power battery, the working status of the thermal management, the current actual charging current, etc., so that the power battery is in the appropriate temperature range as much as possible during the charging process; the specific steps are as follows:

[0165] C1. The battery controller sends a charging request current according to the current state of the power battery and monitors the temperature of the power battery in real time;

[0166] C2. When the battery temperature is detected to exceed the set temperature range threshold, the charging request current sent is multiplied by the current limiting coefficient k1 (k1 can be 0.85~0.95) to appropriately reduce the charging current;

[0167] C3. If, in the case of C2, the temperature still exceeds the set temperature threshold for a certain period of time (such as 5 minutes), the charging request current sent is multiplied by the current limiting coefficient k2 (k2<k1, k2 can be 0.75~0.85); if in the case of 2) current limiting, the real-time battery temperature drops to the set temperature range, the charging request current limit is cancelled;

[0168] C4. If the difference between the battery temperature and the upper limit of the set temperature range is detected to exceed the set threshold, the charging request current sent is multiplied by the current limiting coefficient k3 (k3<k2, k3 can be 0.65~0.75), and the charging cooling request is set to 1, and thermal management is turned on for cooling.

[0169] C5. If during the charging process, the real-time battery allowed charging current is less than the value sent in C2-C4, the requested current is immediately sent according to the allowed charging current, and the current limiting factor is restored to 1.

[0170] C6. When it is detected that the charging end conditions are met, the process ends and the voltage and temperature changes of the power battery during the charging process, the amount of electricity used in the charging process, and the duration of the entire process are recorded.

[0171] The thermal management is turned on to cool down the battery. Specifically, when the battery temperature is too high, the heat is dissipated to the external environment through fans, liquid cooling systems, etc. to prevent the battery from overheating.

[0172] After charging is completed, the information collected during the above charging process is uploaded to the cloud, and the data such as the initial state of charging, voltage change, temperature change process, heating mode and heating time, charging time, power consumption of the whole process, etc. are added to the cloud database. By analyzing the state changes of the power battery, the heating time, optimal temperature range, pulse heating frequency, pulse heating current amplitude and other parameters are optimized as an important reference for subsequent battery charging temperature control.

[0173] Based on the same inventive concept, a battery charging temperature control device corresponding to the battery charging temperature control method is also provided in the embodiment of the present application. Since the principle of solving the problem by the device in the embodiment of the present application is similar to the above-mentioned battery charging temperature control method in the embodiment of the present application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0174] Please refer to Figure 7 , Figure 7 The structure diagram of the battery charging temperature control device according to the embodiment of the present application is shown; the battery charging temperature control device comprises:

[0175] The acquisition module 701 is used to enable the cloud to acquire the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment where the target vehicle is located;

[0176] The first determination module 702 is used to enable the cloud to determine the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of the same type of vehicle, the vehicle-side power battery information, the target charging mode and the target weather information, and send the charging temperature control strategy parameters to the vehicle-side battery controller;

[0177] The judgment module 703 is used to send a heating request when the vehicle-side battery controller determines that heating is required based on the current power battery state after detecting that the charging pile is connected; the types of the heating request include pulse heating request and ordinary heating request;

[0178] The second determination module 704 is used to enable the vehicle-side battery controller to determine a target heating mode according to the type of the heating request and the function of the charging pile, and heat the power battery according to the target heating mode until the state of the power battery meets the heating end condition;

[0179] The control module 705 is used to control the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging.

[0180] In some embodiments, the battery charging temperature control device further includes:

[0181] A sending module is used to send a charging request to the charging pile when the vehicle-side battery controller determines that heating is not required based on the current power battery status after detecting that the charging pile is connected;

[0182] The vehicle-side battery controller responds to the charging request and controls the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process.

[0183] In some embodiments, in the battery charging temperature control device, the first determination module, when enabling the cloud to determine the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of the same vehicle type, the vehicle-side power battery information, the target charging mode and the target weather information, is specifically used to:

[0184] Determine a target ambient temperature range of the environment where the target vehicle is located according to weather information matched with the vehicle location information; the target ambient temperature range corresponds to a target ambient temperature tag;

[0185] Obtaining target historical charging data of a similar vehicle model matching the target ambient temperature tag in the target charging mode, and extracting a relationship between a power battery temperature and a charging current of the target vehicle based on the target historical charging data;

[0186] Determine the starting working condition of charging according to the vehicle-side power battery information, and determine the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting working condition based on the relationship between the power battery temperature and the charging current of the target vehicle;

[0187] Based on the temperature rise rates and starting operating conditions corresponding to the different charging current intervals, the charging temperature control strategy parameters of the target vehicle are determined.

[0188] In some embodiments, in the battery charging temperature control device, the judgment module sends a heating request when the vehicle-side battery controller judges that heating is required based on the current power battery state after detecting that the charging pile is connected, specifically for:

[0189] When the connection of the charging pile is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and determines whether the current power battery state satisfies multiple pulse heating request conditions at the same time; the multiple pulse heating request conditions include: the highest temperature in the current power battery state is less than the first temperature setting threshold, and the lowest temperature is greater than the second temperature setting threshold; the lowest cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest cell voltage is lower than the second voltage setting threshold; the lowest cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest cell SOC is lower than the second SOC setting threshold;

[0190] If yes, a pulse heating request is sent to the charging pile;

[0191] If not, determine whether the normal heating request conditions are met;

[0192] If yes, a normal heating request is sent to the charging pile.

[0193] In some embodiments, in the battery charging temperature control device, the second determination module, when enabling the vehicle-side battery controller to determine the target heating mode according to the type of the heating request and the function of the charging pile, is specifically used to:

[0194] When the type of the heating request is a pulse heating request and the charging pile supports a pulse heating function, determining that the target heating mode is a pulse heating mode;

[0195] When the type of the heating request is a common heating request, and / or the charging pile does not support a pulse heating function, the target heating mode is determined to be a common heating mode.

[0196] In some embodiments, in the battery charging temperature control device, the second determination module, when heating the power battery according to the target heating mode, is specifically used to:

[0197] When the target heating mode is the pulse heating mode, the charging pile sends the pulse heating capability parameters to the vehicle-side battery controller;

[0198] The vehicle-side battery controller combines the pulse heating capacity parameters of the charging pile to output the pulse heating parameters of the pulse heating mode, and starts pulse heating of the power battery; the pulse heating parameters include: pulse heating request voltage, pulse heating request current, and pulse heating frequency;

[0199] Among them, the vehicle-side battery controller determines an actual pulse heating request current and judges whether the actual pulse heating request current is greater than the pulse current upper limit in the pulse heating capacity parameter. If so, the output pulse heating request current is the pulse current upper limit; if not, the actual pulse heating request current is output.

[0200] In some embodiments, in the battery charging temperature control device, the second determination module, when heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition, is specifically used to:

[0201] In the process of pulse heating the power battery in the pulse heating mode, multiple monitoring parameters of the power battery are monitored in real time; the monitoring parameters include: the highest single cell voltage, the lowest single cell voltage, the difference between the pulse heating charging current and the pulse heating discharging current;

[0202] When it is detected that any monitoring parameter triggers the alarm threshold, the pulse heating parameter is limited;

[0203] When any parameter is detected to trigger a fault threshold, the interaction with the charging pile is terminated.

[0204] In some embodiments, in the battery charging temperature control device, the second determination module, when heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition, is specifically used to:

[0205] When the target heating mode is the normal heating mode, the maximum charging capacity parameter of the charging pile is obtained, and the heating end temperature is determined according to the maximum charging capacity parameter of the charging pile; wherein, the larger the maximum charging capacity parameter is, the lower the heating end temperature is;

[0206] The first real-time temperature of the power battery during the heating process is monitored, and when the first real-time temperature of the power battery is greater than the heating end temperature, the heating is ended and the process is switched to the charging stage.

[0207] In some embodiments, in the battery charging temperature control device, the control module, when controlling the power battery of the target vehicle to charge according to the charging temperature control strategy parameters to control the temperature of the power battery during charging, is specifically used to:

[0208] The battery controller sends a charging request current to the charging pile according to the current power battery status, so as to charge according to the charging request current;

[0209] Monitoring a second real-time temperature of the power battery during the charging process, and based on the current limiting condition met by the second real-time temperature, multiplying the sent charging request current by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging; different current limiting conditions correspond to different current limiting coefficients;

[0210] During the current limiting charging process, if the battery controller determines that the real-time power battery allowable charging current is less than the charging request current after current limiting, the charging request current is the power battery allowable charging current, and the current limiting coefficient is restored to 1.

[0211] In some embodiments, in the battery charging temperature control device, the control module, based on the current limiting condition that the second real-time temperature meets, multiplies the charging request current sent by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging, is specifically used to:

[0212] When the second real-time temperature of the monitored power battery exceeds the lower limit of the preset temperature range, the sent charging request current is multiplied by the first current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current for current limiting charging;

[0213] If after reducing the charging current, the second real-time temperature of the power battery is still monitored to exceed the lower limit of the preset temperature range and the duration exceeds the preset duration threshold, the sent charging request current is multiplied by the second current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current twice for current limiting charging; the second current limiting coefficient is less than the first current limiting coefficient;

[0214] When the difference between the second real-time temperature of the power battery and the upper limit of the preset temperature range is greater than the preset current limiting threshold, the charging request current sent is multiplied by the third current limiting coefficient to perform current limiting charging, and thermal management is turned on for cooling.

[0215] Based on the same inventive concept, an electronic device corresponding to the battery charging temperature control method is also provided in the embodiment of the present application. Since the principle of solving the problem by the electronic device in the embodiment of the present application is similar to the above-mentioned battery charging temperature control method in the embodiment of the present application, the implementation of the electronic device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0216] Please refer to Figure 8 , Figure 8 A schematic diagram of the structure of the electronic device described in an embodiment of the present application is shown; the electronic device 800 includes: a processor 802, a memory 801 and a bus, the memory 801 stores machine-readable instructions executable by the processor 802, and when the electronic device 800 is running, the processor 802 communicates with the memory 801 through the bus, and when the machine-readable instructions are executed by the processor 802, the steps of the battery charging temperature control method are executed.

[0217] Based on the same inventive concept, a computer-readable storage medium corresponding to the battery charging temperature control method is also provided in the embodiment of the present application. Since the principle of solving the problem by the computer-readable storage medium in the embodiment of the present application is similar to the above-mentioned battery charging temperature control method in the embodiment of the present application, the implementation of the computer-readable storage medium can refer to the implementation of the method, and the repeated parts will not be repeated.

[0218] A computer-readable storage medium stores a computer program, which executes the steps of the battery charging temperature control method when executed by a processor.

[0219] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0220] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0221] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0222] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a platform server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0223] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery charging temperature control method, characterized in that: The method comprises: The cloud obtains the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment in which the target vehicle is located; The cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, and sends the charging temperature control strategy parameters to the vehicle-side battery controller; When the charging pile connection is detected, the vehicle-side battery controller sends a heating request when it determines that heating is required based on the current power battery status; the types of heating requests include pulse heating requests and ordinary heating requests; The vehicle-side battery controller determines a target heating mode according to the type of the heating request and the function of the charging pile, and heats the power battery according to the target heating mode until the state of the power battery meets the heating end condition; Controlling the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during charging; The cloud determines the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of the same type of vehicle, the vehicle-side power battery information, the target charging mode and the target weather information, including: Determine a target ambient temperature range of the environment where the target vehicle is located according to weather information matched with the vehicle location information; the target ambient temperature range corresponds to a target ambient temperature tag; Obtaining target historical charging data of a similar vehicle model matching the target ambient temperature tag in the target charging mode, and extracting a relationship between a power battery temperature and a charging current of the target vehicle based on the target historical charging data; Determine the starting working condition of charging according to the vehicle-side power battery information, and determine the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting working condition based on the relationship between the power battery temperature and the charging current of the target vehicle; Determining charging temperature control strategy parameters of the target vehicle based on the temperature rise rates and starting operating conditions corresponding to the different charging current intervals; When the vehicle-side battery controller determines that heating is required based on the current power battery state after detecting that the charging pile is connected, a heating request is sent, including: When the connection of the charging pile is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and determines whether the current power battery state satisfies multiple pulse heating request conditions at the same time; the multiple pulse heating request conditions include: the highest temperature in the current power battery state is less than the first temperature setting threshold, and the lowest temperature is greater than the second temperature setting threshold; the lowest cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest cell voltage is lower than the second voltage setting threshold; the lowest cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest cell SOC is lower than the second SOC setting threshold; If yes, a pulse heating request is sent to the charging pile; If not, determine whether the normal heating request conditions are met; If yes, a normal heating request is sent to the charging pile.

2. The battery charging temperature control method according to claim 1, characterized in that: The method further comprises: When the charging pile connection is detected, the vehicle-side battery controller determines that heating is not required based on the current power battery status and sends a charging request to the charging pile; The vehicle-side battery controller responds to the charging request and controls the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters to control the temperature of the power battery during the charging process.

3. The battery charging temperature control method according to claim 1, characterized in that: The vehicle-side battery controller determines a target heating mode according to the type of the heating request and the function of the charging pile, including: When the type of the heating request is a pulse heating request and the charging pile supports a pulse heating function, determining that the target heating mode is a pulse heating mode; When the type of the heating request is a common heating request, and / or the charging pile does not support a pulse heating function, the target heating mode is determined to be a common heating mode.

4. The battery charging temperature control method according to claim 3, characterized in that: The power battery is heated according to the target heating mode, including: When the target heating mode is the pulse heating mode, the charging pile sends the pulse heating capability parameters to the vehicle-side battery controller; The vehicle-side battery controller combines the pulse heating capacity parameters of the charging pile to output the pulse heating parameters of the pulse heating mode, and starts pulse heating of the power battery; the pulse heating parameters include: pulse heating request voltage, pulse heating request current, and pulse heating frequency; Among them, the vehicle-side battery controller determines an actual pulse heating request current and judges whether the actual pulse heating request current is greater than the pulse current upper limit in the pulse heating capacity parameter. If so, the output pulse heating request current is the pulse current upper limit; if not, the actual pulse heating request current is output.

5. The battery charging temperature control method according to claim 3 or 4, characterized in that: The power battery is heated according to the target heating mode until the state of the power battery meets the heating end condition, and the heating is ended, including: In the process of pulse heating the power battery in the pulse heating mode, multiple monitoring parameters of the power battery are monitored in real time; the monitoring parameters include: the highest single cell voltage, the lowest single cell voltage, the difference between the pulse heating charging current and the pulse heating discharging current; When it is detected that any monitoring parameter triggers the alarm threshold, the pulse heating parameter is limited; When any parameter is detected to trigger a fault threshold, the interaction with the charging pile is terminated.

6. The battery charging temperature control method according to claim 1, characterized in that: The step of heating the power battery according to the target heating mode until the state of the power battery meets the heating end condition ends, comprises: When the target heating mode is the normal heating mode, the maximum charging capacity parameter of the charging pile is obtained, and the heating end temperature is determined according to the maximum charging capacity parameter of the charging pile; wherein, the larger the maximum charging capacity parameter is, the lower the heating end temperature is; The first real-time temperature of the power battery during the heating process is monitored, and when the first real-time temperature of the power battery is greater than the heating end temperature, the heating is ended and the process is switched to the charging stage.

7. The battery charging temperature control method according to claim 1, characterized in that: The step of controlling the power battery of the target vehicle to charge according to the charging temperature control strategy parameters to control the temperature of the power battery during charging includes: The battery controller sends a charging request current to the charging pile according to the current power battery status, so as to charge according to the charging request current; Monitoring a second real-time temperature of the power battery during the charging process, and based on the current limiting condition met by the second real-time temperature, multiplying the sent charging request current by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging; different current limiting conditions correspond to different current limiting coefficients; During the current limiting charging process, if the battery controller determines that the real-time power battery allowable charging current is less than the charging request current after current limiting, the charging request current is the power battery allowable charging current, and the current limiting coefficient is restored to 1.

8. The battery charging temperature control method according to claim 7, characterized in that: Based on the current limiting condition met by the second real-time temperature, the sent charging request current is multiplied by the current limiting coefficient corresponding to the current limiting condition in the charging temperature control strategy parameter to perform current limiting charging, including: When the second real-time temperature of the monitored power battery exceeds the lower limit of the preset temperature range, the sent charging request current is multiplied by the first current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current for current limiting charging; If after reducing the charging current, the second real-time temperature of the power battery is still monitored to exceed the lower limit of the preset temperature range and the duration exceeds the preset duration threshold, the sent charging request current is multiplied by the second current limiting coefficient in the charging temperature control strategy parameter to reduce the charging current twice for current limiting charging; the second current limiting coefficient is less than the first current limiting coefficient; When the difference between the second real-time temperature of the power battery and the upper limit of the preset temperature range is greater than the preset current limiting threshold, the charging request current sent is multiplied by the third current limiting coefficient to perform current limiting charging, and thermal management is turned on for cooling.

9. A battery charging temperature control device, characterized in that: The device comprises: An acquisition module is used to enable the cloud to acquire the vehicle location information of the target vehicle, the vehicle-side power battery information, and the target charging mode selected by the user for the target vehicle; the vehicle location information is used to determine the target weather information of the environment in which the target vehicle is located; A first determination module is used to enable the cloud to determine the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of similar vehicle models, the vehicle-side power battery information, the target charging mode and the target weather information, and send the charging temperature control strategy parameters to the vehicle-side battery controller; A judgment module, which is used to send a heating request when the vehicle-side battery controller determines that heating is required based on the current power battery state after detecting that the charging pile is connected; the types of the heating request include pulse heating request and ordinary heating request; A second determination module is used to enable the vehicle-side battery controller to determine a target heating mode according to the type of the heating request and the function of the charging pile, and heat the power battery according to the target heating mode until the state of the power battery meets the heating end condition; A control module, used to control the charging of the power battery of the target vehicle according to the charging temperature control strategy parameters, so as to control the temperature of the power battery during charging; The first determination module, when enabling the cloud to determine the charging temperature control strategy parameters of the power battery of the target vehicle based on the historical charging data of the same type of vehicle, the vehicle-side power battery information, the target charging mode and the target weather information, is specifically used to: Determine a target ambient temperature range of the environment where the target vehicle is located according to weather information matched with the vehicle location information; the target ambient temperature range corresponds to a target ambient temperature tag; Obtaining target historical charging data of a similar vehicle model matching the target ambient temperature tag in the target charging mode, and extracting a relationship between a power battery temperature and a charging current of the target vehicle based on the target historical charging data; Determine the starting working condition of charging according to the vehicle-side power battery information, and determine the temperature rise rate corresponding to different charging current intervals of the target vehicle under the starting working condition based on the relationship between the power battery temperature and the charging current of the target vehicle; Determining charging temperature control strategy parameters of the target vehicle based on the temperature rise rates and starting operating conditions corresponding to the different charging current intervals; The judgment module, when detecting that the charging pile is connected, sends a heating request when the vehicle-side battery controller determines that heating is required based on the current power battery state, is specifically used to: When the connection of the charging pile is detected, the vehicle-side battery controller determines that heating is required based on the current power battery state, and determines whether the current power battery state satisfies multiple pulse heating request conditions at the same time; the multiple pulse heating request conditions include: the highest temperature in the current power battery state is less than the first temperature setting threshold, and the lowest temperature is greater than the second temperature setting threshold; the lowest cell voltage in the current power battery state is higher than the first voltage setting threshold, and the highest cell voltage is lower than the second voltage setting threshold; the lowest cell SOC in the current power battery state is higher than the first SOC setting threshold, and the highest cell SOC is lower than the second SOC setting threshold; If yes, a pulse heating request is sent to the charging pile; If not, determine whether the normal heating request conditions are met; If yes, a normal heating request is sent to the charging pile.

10. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the battery charging temperature control method as described in any one of claims 1 to 8 are performed.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the battery charging temperature control method as claimed in any one of claims 1 to 8 are executed.

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