Battery charging thermal management control method and new energy vehicle

Abstract

This application provides a battery charging thermal management control method and a new energy vehicle, relating to the field of vehicle management technology. The method includes: responding to a charging start signal from a target vehicle; acquiring the battery temperature, current state of charge (SOC) parameters, and current ambient temperature of the power battery on the target vehicle; determining a target charging thermal management mode from a set of preset charging thermal management modes based on the battery temperature and the current ambient temperature; determining the current target charging current of the power battery based on the battery's operating temperature range, the current SOC parameters, and the target charging thermal management mode; and during the charging process of the power battery, using the target charging thermal management mode to control the thermal management system of the target vehicle to control the temperature of the power battery, ensuring that the battery temperature remains within the corresponding operating temperature range. This application avoids unnecessary energy loss from the power battery, thereby reducing the overall vehicle charging energy consumption.

Description

Technical Field

[0001] This application relates to the field of vehicle management technology, and more specifically, to a battery charging thermal management control method and a new energy vehicle. Background Technology

[0002] In recent years, new energy heavy-duty trucks have achieved rapid development due to their environmental friendliness and policy support, making vehicle energy consumption a core indicator of customer concern. Vehicle energy consumption mainly includes two aspects: vehicle operation energy consumption and charging energy consumption. Among these, the energy consumption of the thermal management system in the charging stage has not yet received sufficient attention.

[0003] In traditional technologies, power batteries are high-value core components. The risk of cycle life degradation caused by high-temperature charging has prompted thermal management systems to prioritize battery safety and performance. This is achieved by actively regulating the battery temperature to the optimal operating range and matching the optimal charging rate to meet the requirements of battery life and safety.

[0004] However, with breakthroughs in battery technology, the limitations of existing thermal management strategies are becoming increasingly apparent. Battery cycle life has far exceeded the full lifespan requirements of new energy vehicles, reducing the necessity of traditional thermal management strategies that prioritize extending battery life. If the focus remains on maintaining optimal battery performance, the thermal management system will operate at continuously high power during charging, resulting in unnecessary energy loss and ultimately increasing the overall vehicle charging energy consumption. Summary of the Invention

[0005] The purpose of this application is to address the shortcomings of the prior art by providing a battery charging thermal management control method and a new energy vehicle, thereby avoiding unnecessary energy loss from the power battery and reducing the overall vehicle charging energy consumption.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0007] In a first aspect, one embodiment of this application provides a battery charging thermal management control method, the method comprising:

[0008] In response to the start charging signal of the target vehicle, the battery temperature, current state of charge parameters, and current ambient temperature of the power battery on the target vehicle are obtained.

[0009] Based on the battery temperature and the current ambient temperature, a target charging thermal management mode is determined from a plurality of preset charging thermal management modes; different charging thermal management modes have different battery operating temperature ranges.

[0010] Based on the operating temperature range of the battery, the current state of charge parameter, and the target charging thermal management mode, the current target charging current of the power battery is determined, and the current target charging current is sent to the target charging device so that the target charging device uses the current target charging current to charge the power battery.

[0011] During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature of the power battery is within the corresponding battery operating temperature range.

[0012] Optionally, the plurality of preset charging thermal management modes include: a basic charging thermal management mode and at least one customized charging thermal management mode; each customized charging thermal management mode is a charging thermal management mode for the target vehicle that is preset by the user through a terminal device.

[0013] The step of determining a target charging thermal management mode from a set of preset charging thermal management modes based on the battery temperature and the current ambient temperature includes:

[0014] Based on the battery temperature and the current ambient temperature, determine whether the activation trigger conditions for each customized charging thermal management mode are met.

[0015] If the activation trigger conditions for all customized charging thermal management modes are not met, then the basic charging thermal management mode is determined to be the target charging thermal management mode.

[0016] If the activation trigger condition of any customized charging thermal management mode is met, then the customized charging thermal management mode is determined to be the target charging thermal management mode.

[0017] Optionally, the at least one customized charging thermal management mode includes: a low-temperature charging thermal management mode and a high-temperature charging thermal management mode;

[0018] The step of determining whether the activation trigger conditions for each customized charging thermal management mode are met based on the battery temperature and the current ambient temperature includes:

[0019] If the current ambient temperature is less than or equal to a preset low-temperature environment threshold, and the battery temperature is less than or equal to a first battery temperature threshold, then the activation trigger condition of the low-temperature charging thermal management mode is determined to be met.

[0020] If the current ambient temperature is greater than or equal to a preset high-temperature environment threshold, and the battery temperature is greater than or equal to a second battery temperature threshold, then the activation trigger condition for the high-temperature charging thermal management mode is determined to be met.

[0021] Optionally, determining the current target charging current of the power battery based on the operating temperature range of the battery, the current state of charge parameter, and the target charging thermal management mode includes:

[0022] If the target charging thermal management mode is the basic charging thermal management mode, then the current target charging current is determined by using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature.

[0023] During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature of the power battery is within the corresponding battery operating temperature range, including:

[0024] During the charging process of the power battery, the basic charging thermal management mode is adopted to control the thermal management system to control the temperature of the power battery until the battery temperature of the power battery enters the preset optimal operating temperature range.

[0025] Optionally, determining the current target charging current of the power battery based on the operating temperature range of the battery, the current state of charge, and the target charging thermal management mode includes:

[0026] If the target charging thermal management mode is a low-temperature charging thermal management mode or a high-temperature charging thermal management mode, and the operating temperature range is a first temperature range lower than the preset optimal operating temperature range, then the maximum charging current of the battery temperature under the current charging state is determined by using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature.

[0027] The current target charging current is determined based on the maximum charging current and the current output current of the target charging device.

[0028] Optionally, determining the current target charging current based on the maximum charging current and the current output current of the target charging device includes:

[0029] If the maximum charging current is greater than or equal to the current output current of the target charging device, then the maximum charging current is determined to be the current target charging current.

[0030] Optionally, determining the current target charging current based on the maximum charging current and the current output current of the target charging device includes:

[0031] If the maximum charging current is less than the current output current of the target charging device, then the charging current at a temperature adjacent to the battery temperature is determined using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature.

[0032] If the charging current at the adjacent temperature is greater than the maximum charging current, then the charging current at the adjacent temperature is determined to be the current target charging current.

[0033] Optionally, during the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature of the power battery is within the corresponding battery operating temperature range, including:

[0034] If the target charging thermal management mode is a low-temperature charging thermal management mode, then during the charging process of the power battery, the heating device in the thermal management system is controlled to heat the power battery so that the battery temperature of the power battery is within the first temperature range.

[0035] If the target charging thermal management mode is a high-temperature charging thermal management mode, during the charging process of the power battery, the condensation device in the thermal management system is controlled to cool the power battery so that the battery temperature is in the second temperature range.

[0036] Optionally, before determining the target charging thermal management mode from a plurality of preset charging thermal management modes based on the battery temperature and the current ambient temperature, the method further includes:

[0037] Obtain the charging thermal management strategy configuration information for the target vehicle transmitted by the terminal device;

[0038] Based on the charging thermal management strategy configuration information, a target charging thermal management mode is generated.

[0039] Secondly, another embodiment of this application provides a battery charging thermal management control device, the device comprising:

[0040] The response module is used to respond to the start charging signal of the target vehicle and obtain the battery temperature, current state of charge parameters and current ambient temperature of the power battery on the target vehicle.

[0041] The determination module is used to determine a target charging thermal management mode from a plurality of preset charging thermal management modes based on the battery temperature and the current ambient temperature; different charging thermal management modes have different battery operating temperature ranges.

[0042] The determination module is used to determine the current target charging current of the power battery based on the operating temperature range of the battery temperature, the current state of charge parameter and the target charging thermal management mode, and send the current target charging current to the target charging device so that the target charging device uses the current target charging current to charge the power battery;

[0043] The control module is used to control the thermal management system of the target vehicle to control the temperature of the power battery during the charging process of the power battery by adopting the target charging thermal management mode, so that the battery temperature of the power battery is within the corresponding battery operating temperature range.

[0044] Thirdly, another embodiment of this application provides a battery management system for performing the steps of the battery charging thermal management control method as described in any of the first aspects above.

[0045] Fourthly, another embodiment of this application provides a storage medium storing a computer program, which, when executed by a processor, performs the steps of the battery charging thermal management control method described in any of the first aspects above.

[0046] Fifthly, another embodiment of this application provides a new energy vehicle, the new energy vehicle including: a vehicle body, a power battery, a battery management system, a thermal management system and an ambient temperature sensor disposed on the vehicle body; wherein, the power battery and the battery management system are connected, the battery management system, the ambient temperature sensor and the thermal management system are all connected to a preset vehicle bus, and the battery management system is used to execute the steps of the battery charging thermal management control method described in any of the first aspects above.

[0047] The beneficial effects of this application are:

[0048] This application provides a battery charging thermal management control method and a new energy vehicle. Responding to the start-charging signal of the target vehicle, the method acquires the battery temperature, current state-of-charge (SOC) parameters, and current ambient temperature of the power battery on the target vehicle. Based on the battery temperature and current ambient temperature, a target charging thermal management mode is determined from multiple preset charging thermal management modes. Different charging thermal management modes have different battery operating temperature ranges, avoiding the use of the same charging mode when the power battery temperature, current SOC parameters, and current ambient temperature are different, which would lead to excessive energy consumption during battery charging. Based on the battery's operating temperature range, current SOC parameters, and target charging thermal management mode, the method determines the current target charging current for the power battery and sends this current to the target charging device. This allows the target charging device to charge the power battery using the current target charging current, enabling precise control of the charging process and preventing overcharging or over-discharging of the battery, which could lead to thermal runaway. During the charging process of the power battery, a target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature is within the corresponding battery operating temperature range. This can avoid unnecessary energy loss caused by the thermal management of the power battery in a single mode, thereby reducing the overall vehicle charging energy consumption. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 A schematic flowchart illustrating a battery charging thermal management control method provided in an embodiment of this application;

[0051] Figure 2 A schematic flowchart illustrating the determination of a target thermal management mode in a battery charging thermal management control method provided in an embodiment of this application;

[0052] Figure 3 A schematic flowchart illustrating the determination of a target charging current in a battery charging thermal management control method provided in this application embodiment;

[0053] Figure 4 A schematic diagram of the process for determining the target current in another battery charging thermal management control method provided in this application embodiment;

[0054] Figure 5 A schematic flowchart illustrating the determination of the target charging current in another battery charging thermal management control method provided in this application embodiment;

[0055] Figure 6 This is a flowchart illustrating a battery charging thermal management control method that determines the battery operating temperature range, as provided in an embodiment of this application.

[0056] Figure 7 This is a schematic diagram of the process for generating a target charging thermal management mode in a battery charging thermal management control method provided in an embodiment of this application;

[0057] Figure 8 This is a schematic diagram of the structure of a battery charging thermal management control device provided in an embodiment of this application;

[0058] Figure 9 This is a structural schematic diagram of a new energy vehicle provided in an embodiment of this application. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0060] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0061] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0062] The energy consumption of new energy vehicles has increasingly become a focus of the industry, mainly consisting of vehicle operation energy consumption and charging energy consumption. However, energy consumption during the charging process has not received sufficient attention. On the one hand, as a high-value core component, the power battery is easily affected by high-temperature charging scenarios, impacting its cycle life. Thermal management systems must prioritize ensuring the battery remains within its optimal temperature range to maximize performance. On the other hand, the risk of battery thermal runaway can lead to serious consequences, making safety the primary priority in thermal management strategies for a long time. However, with breakthroughs in battery technology significantly reducing the probability of thermal runaway, the conservative limitations of traditional thermal management strategies are becoming increasingly apparent, necessitating optimization of battery charging energy consumption. New energy vehicles can include new energy heavy-duty trucks, new energy urban logistics vehicles, and new energy public transportation, etc., and this application does not limit the specific vehicles described.

[0063] Therefore, this application provides a battery charging thermal management control method applied to the battery management system of a target vehicle. By using the target vehicle's start-charging signal, the method acquires the battery temperature, current state-of-charge (SOC) parameters, and current ambient temperature of the vehicle's power battery. Based on the battery temperature and ambient temperature, a target charging thermal management mode is determined from multiple preset charging thermal management modes. Based on the battery's operating temperature range, the current SOC parameters, and the target charging thermal management mode, a target charging current for the power battery is determined and sent to the target charging device. The target charging device then charges the power battery using this target charging current. During the charging process, the target charging thermal management mode is used to control the vehicle's thermal management system to maintain the power battery temperature within its corresponding operating temperature range. This battery charging thermal management control method can determine the target charging management mode based on the battery temperature and current ambient temperature, avoiding a single charging mode and reducing energy consumption during the vehicle's charging process.

[0064] Figure 1 This is a flowchart illustrating a battery charging thermal management control method provided in an embodiment of this application, as shown below. Figure 1 As shown, the method includes:

[0065] Step 101: Respond to the start charging signal of the target vehicle and obtain the battery temperature, current state of charge parameters and current ambient temperature of the power battery on the target vehicle.

[0066] The target vehicle is a new energy vehicle, specifically a new energy heavy truck, a new energy logistics vehicle, a new energy transport vehicle, etc., but this application embodiment does not limit this. The start charging signal can be triggered by connecting the charging gun to the target vehicle. The power battery contains multiple cells, and the battery temperature is determined based on the temperatures measured by temperature sensors on each cell. The current state of charge (SOC) parameters of the power battery are determined by the battery management system. The current ambient temperature is determined by temperature sensors located outside the target vehicle.

[0067] Optionally, when the charging gun is connected to the target vehicle, it indicates that the target vehicle has started charging. In response to the start charging signal of the target vehicle, the temperature of the power battery is determined by the temperature sensor installed on the cell inside the power battery, the state of charge parameters of the power battery are obtained, and the current ambient temperature is determined by the temperature sensor installed on the outside of the target vehicle.

[0068] Step 102: Based on the battery temperature and the current ambient temperature, determine the target charging thermal management mode from a set of preset charging thermal management modes.

[0069] Different charging thermal management modes have different battery operating temperature ranges.

[0070] Optionally, the target charging thermal management mode is determined by comparing the battery temperature and the current ambient temperature with the preset battery temperature and preset ambient temperature in a plurality of preset charging thermal management modules.

[0071] Step 103: Determine the current target charging current of the power battery based on the operating temperature range of the battery, the current state of charge parameters, and the target charging thermal management mode, and send the current target charging current to the target charging device so that the target charging device can charge the power battery using the current target charging current.

[0072] The operating temperature range of the battery is the same as the operating temperature range corresponding to the target charging thermal management mode. The charging equipment can be a ground-based charging device, such as a slow charging device or a fast charging device.

[0073] Optionally, the charging rate of the power battery is determined based on the battery temperature and current state of charge parameters. The current target charging current of the power battery is then determined based on the charging rate and rated capacity of the power battery. This current target charging current is then sent to the target charging device, enabling the target charging device to charge the power battery using this current.

[0074] Step 104: During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery so that the battery temperature is within the corresponding battery operating temperature range.

[0075] The thermal management system can be used to cool or heat the power battery. It can include a heater and a cooling system; the heater heats the power battery, and the cooling system cools it.

[0076] Optionally, during the charging process of the power battery, a target charging thermal management mode is adopted, controlling the thermal management system of the target vehicle to control the temperature of the power battery. When the temperature of the power battery is lower than the corresponding battery operating temperature range, the heater in the thermal management system is controlled to heat the power battery until its temperature reaches the corresponding battery operating temperature range. When the temperature of the power battery is higher than the corresponding battery operating temperature range, the refrigeration unit in the thermal management system is controlled to cool the power battery until its temperature reaches the corresponding battery operating temperature range.

[0077] This application provides a battery charging thermal management control method. In response to a charging start signal from a target vehicle, the method acquires the battery temperature, current state of charge (SOC) parameters, and current ambient temperature of the power battery in the target vehicle. Based on the battery temperature and current ambient temperature, a target charging thermal management mode is determined from a set of preset charging thermal management modes. Different charging thermal management modes have different battery operating temperature ranges, avoiding the use of the same charging mode when the power battery temperature, SOC parameters, and ambient temperature vary, which could lead to excessive energy consumption during battery charging. Based on the battery's operating temperature range, current SOC parameters, and target charging thermal management mode, the method determines the current target charging current for the power battery and sends this current to the target charging device. This allows the target charging device to charge the power battery using the current target charging current, enabling precise control of the charging process and preventing overcharging or over-discharging that could lead to thermal runaway. During the charging process of the power battery, a target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature is within the corresponding battery operating temperature range. This can avoid unnecessary energy loss caused by the thermal management of the power battery in a single mode, thereby reducing the overall vehicle charging energy consumption.

[0078] Based on the above embodiments, the multiple preset charging thermal management modes include: a basic charging thermal management mode and at least one customized charging thermal management mode; each customized charging thermal management mode is a charging thermal management mode preset by the user for a target vehicle through a terminal device. Therefore, this application also provides a process for determining the target thermal management mode in a battery charging thermal management control method. Figure 2 This is a flowchart illustrating the determination of a target thermal management mode in a battery charging thermal management control method provided in an embodiment of this application, as shown below. Figure 2 As shown, in step 102 above, based on the battery temperature and the current ambient temperature, a target charging thermal management mode is determined from a set of preset charging thermal management modes, including:

[0079] Step 201: Determine whether the activation trigger conditions for each customized charging thermal management mode are met based on the battery temperature and the current ambient temperature.

[0080] Each customized charging thermal management mode has different battery temperature thresholds and current ambient temperature thresholds. The corresponding customized charging thermal management mode is determined by judging the battery temperature and the current ambient temperature.

[0081] Optionally, the battery temperature and the current ambient temperature are compared with the battery and temperature thresholds and the current ambient temperature thresholds in each customized charging thermal management mode to determine whether the battery temperature and the current ambient temperature meet the activation trigger conditions of each customized charging thermal management mode.

[0082] Step 202: If the activation trigger conditions for all customized charging thermal management modes are not met, then the basic charging thermal management mode is determined as the target charging thermal management mode.

[0083] In the basic charging thermal management mode, the temperature range of the power battery in the target vehicle is between 20 degrees Celsius and 30 degrees Celsius.

[0084] Optionally, the battery temperature and the current ambient temperature are compared with the battery and temperature thresholds and the current ambient temperature thresholds in each customized charging thermal management mode. If the battery temperature does not meet the battery and temperature thresholds in each customized charging thermal management mode; or the current ambient temperature does not meet the current ambient temperature threshold in each customized charging thermal management mode; or the battery temperature does not meet the battery and temperature thresholds in each customized charging thermal management mode and the current ambient temperature does not meet the current ambient temperature threshold in each customized charging thermal management mode, then the basic charging thermal management mode is determined as the target charging thermal management mode.

[0085] Step 203: If the activation trigger condition of any customized charging thermal management mode is met, then determine any customized charging thermal management mode as the target charging thermal management mode.

[0086] Among them, any customized charging thermal management mode can be either a low-temperature charging thermal management mode or a high-temperature charging thermal management mode.

[0087] Optionally, if the battery temperature and the current ambient temperature simultaneously meet the activation trigger conditions of any custom charging thermal management mode, then any custom charging thermal management mode is determined as the target charging thermal management mode.

[0088] In this embodiment, the activation trigger condition of the customized charging thermal management mode is determined based on the battery temperature and the current ambient temperature. If the condition is not met, the basic charging thermal management mode is determined as the target charging thermal management mode; otherwise, the customized charging thermal management mode corresponding to the battery temperature and the current ambient temperature is determined as the target charging thermal management mode. This application avoids thermal management of the power battery solely through the basic charging thermal management mode. By using the customized charging thermal management mode, energy consumption during the thermal management process can be reduced, thus saving charging energy for the power battery.

[0089] Based on the above embodiments, at least one customized charging thermal management mode includes: a low-temperature charging thermal management mode and a high-temperature charging thermal management mode. Therefore, this application provides a process for determining whether activation trigger conditions are met in a battery charging thermal management control method. In step 201 above, determining whether the activation trigger conditions for each customized charging thermal management mode are met based on the battery temperature and the current ambient temperature includes:

[0090] If the current ambient temperature is less than or equal to the preset low-temperature environment threshold, and the battery temperature is less than or equal to the first battery temperature threshold, then the activation trigger condition for the low-temperature charging thermal management mode is determined to be met.

[0091] The preset low-temperature environment threshold can be 0 degrees Celsius, and the first battery temperature threshold can be 5 degrees Celsius. The low-temperature charging thermal management mode is a thermal management mode for power battery charging in winter, which can control the temperature of the power battery between 10 degrees Celsius and 20 degrees Celsius.

[0092] Optionally, if the current ambient temperature detected by the temperature sensor of the external facility of the target vehicle is less than or equal to a preset low temperature environment threshold, and the temperature sensor inside the power battery detects that the battery temperature is less than or equal to a first battery temperature threshold, it indicates that it may be winter, and the activation trigger condition of the low temperature charging thermal management mode is determined to be met.

[0093] If the current ambient temperature is greater than or equal to the preset high-temperature environment threshold, and the battery temperature is greater than or equal to the second battery temperature threshold, then the activation trigger condition for the high-temperature charging thermal management mode is determined to be met.

[0094] The preset high-temperature environment threshold can be 35 degrees Celsius, and the second battery temperature threshold can be 30 degrees Celsius. The high-temperature charging thermal management mode is a thermal management mode for power battery charging in summer, which can control the temperature of the power battery between 30 degrees Celsius and 45 degrees Celsius.

[0095] Optionally, if the current ambient temperature detected by the temperature sensor of the external facility of the target vehicle is greater than or equal to the preset high temperature environment threshold, and the temperature sensor inside the power battery detects that the battery temperature is greater than or equal to the second battery temperature threshold, it indicates that it may be summer, and the activation trigger condition of the high temperature charging thermal management mode is determined to be met.

[0096] In this embodiment, a thermal management mode for the power battery is determined based on the current ambient temperature and battery temperature, and thermal management of the power battery is performed using the corresponding thermal management mode. This ensures that the power battery operates within its optimal temperature range under different ambient and battery temperatures, thereby guaranteeing normal and efficient charging and discharging of the battery and reducing unnecessary energy consumption.

[0097] Based on the above embodiments, this application also provides a process for determining the target charging current in a battery charging thermal management control method. Figure 3 This is a flowchart illustrating the determination of the target charging current in a battery charging thermal management control method provided in an embodiment of this application, as shown below. Figure 3 As shown, in step 103 above, the current target charging current of the power battery is determined based on the operating temperature range of the battery, the current state of charge parameters, and the target charging thermal management mode, including:

[0098] Step 301: If the target charging thermal management mode is the basic charging thermal management mode, then the current target charging current is determined by using the charging capacity mapping table of the power battery based on the current state of charge and battery temperature.

[0099] For example, Table 1 is a charging capacity mapping table provided in an embodiment of this application:

[0100] Table 1 Charging Capacity Mapping Table

[0101] 0％ 10％ 20％ 30％ 40％ 50％ 60％ 70％ 80％ 85％ 90％ 100％ -5 0 0 0 0 0 0 0 0 0 0 0 0 0 0.5C 0.5C 0.3C 0.3C 0.2C 0.2C 0.2C 0.1C 0.1C 0.1C 0.05C 0.02C 5 0.7C 0.7C 0.7C 0.5C 0.4C 0.4C 0.35C 0.2C 0.2C 0.2C 0.1C 0.05C 10 0.8C 0.8C 0.8C 0.8C 0.6C 0.6C 0.5C 0.4C 0.4C 0.3C 0.3C 0.2C 15 1C 1C 1C 0.9C 0.9C 0.8C 0.8C 0.6C 0.6C 0.5C 0.5C 0.2C 20 1C 1C 1C 1C 1C 0.9C 0.9C 0.9C 0.7C 0.6C 0.5C 0.2C 25 1C 1C 1C 1C 1C 1C 1C 1C 0.8C 0.7C 0.7C 0.2C 30 1C 1C 1C 1C 1C 1C 1C 1C 1C 0.9C 0.8C 0.2C 35 1C 1C 1C 1C 1C 1C 1C 1C 1C 0.9C 0.8C 0.2C 40 1C 1C 1C 1C 1C 1C 1C 1C 1C 0.9C 0.8C 0.2C 45 1C 1C 1C 1C 1C 1C 1C 1C 1C 0.9C 0.8C 0.2C 50 1C 1C 1C 1C 1C 1C 1C 1C 1C 0.9C 0.8C 0.2C 55 0.8C 0.8C 0.8C 0.8C 0.8C 0.8C 0.8C 0.8C 0.8C 0.7C 0.6C 0.2C 60 0.2C 0.2C 0.2C 0.2C 0.2C 0.2C 0.2C 0.2C 0.2C 0.2C 0.1C 0.1C 65 0 0 0 0 0 0 0 0 0 0 0 0

[0102] The horizontal axis represents the state of charge (SOC) parameter, the vertical axis represents the battery temperature, and C represents the charging rate, used to indicate current capability. The maximum charging current of the battery can be determined based on the charging rate and the battery's rated capacity. Charging batteries below 0 degrees Celsius can lead to lithium plating and instability at high temperatures. Currently, the permissible charging operating temperature range for batteries is generally 0–60°C. The charging capability mapping table in this application includes multiple temperatures between -5°C and 65°C, along with charging rates for different SOC parameters. Below 10°C, battery charging capability is weak; above 45°C, localized overheating is likely. Maintaining the battery charging operating temperature within the range of 10°C to 45°C is considered a safe and reasonable range.

[0103] Under low-temperature charging thermal management mode, the battery temperature is 10°C to 20°C; under high-temperature charging thermal management mode, the battery temperature can be 30°C to 45°C; and under basic charging thermal management mode, the battery temperature can be 10°C to 20°C. In the low-temperature charging thermal management mode temperature range, the battery can be charged at 1C when its state of charge (SOC) parameter is low. As the SOC parameter increases, the current capacity decreases, meaning the charging rate decreases. In the high-temperature charging thermal management mode temperature range, the charging rate is highest for the same SOC parameter.

[0104] Optionally, based on the current state-of-charge parameters and battery temperature, the target charging rate is determined from the power battery's charging capacity mapping table, and the current target charging current of the power battery is calculated based on the target charging rate and the rated capacity of the power battery. Specifically, the product of the target charging rate and the rated capacity of the power battery can be used as the current target charging current.

[0105] In step 104 above, during the charging process of the power battery, a target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature is within the corresponding battery operating temperature range, including:

[0106] Step 302: During the charging process of the power battery, the basic charging thermal management mode is adopted to control the temperature of the power battery through the thermal management system until the battery temperature of the power battery enters the preset optimal operating temperature range.

[0107] The optimal operating temperature range for the basic charging thermal management mode is 10 to 20 degrees Celsius.

[0108] Optionally, during the charging process of the power battery, a basic charging thermal management mode is adopted to control the temperature of the power battery through the thermal management system. If the battery temperature is lower than the optimal operating temperature range, the power battery is heated until its temperature reaches the minimum value of the preset optimal operating temperature range. If the battery temperature is higher than the optimal operating temperature range, the power battery is cooled until its temperature reaches the maximum value of the preset optimal operating temperature range.

[0109] In this embodiment, the target charging current is determined based on the current state of charge parameters and battery temperature. The battery temperature is then controlled according to the corresponding thermal management mode until the lithium battery temperature enters a preset optimal operating range. This application enables the battery to maintain a suitable temperature and current during charging, preventing performance degradation and capacity decay caused by overcharging, over-discharging, or abnormal temperature.

[0110] Based on the above embodiments, this application also provides another process for determining the target current in a battery charging thermal management control method. Figure 4 A flowchart illustrating the determination of the target current in another battery charging thermal management control method provided in this application embodiment is shown below. Figure 4 As shown, in step 103 above, the current target charging current of the power battery is determined based on the operating temperature range of the battery, the current state of charge parameters, and the target charging thermal management mode, including:

[0111] Step 401: If the target charging thermal management mode is a low temperature charging thermal management mode or a high temperature charging thermal management mode, and the operating temperature range is the first temperature range lower than the preset optimal operating temperature range, then the maximum charging current of the battery temperature under the current state of charge is determined by using the charging capacity mapping table of the power battery based on the current state of charge and battery temperature.

[0112] The first temperature range is the area below the optimal operating temperature range. When the optimal operating temperature range is 20 to 30 degrees Celsius, the first temperature range is 10 to 20 degrees Celsius.

[0113] Optionally, if the target charging thermal management mode is a low-temperature charging thermal management mode or a high-temperature charging thermal management mode, and the operating temperature range is a first temperature range lower than the preset optimal operating temperature range, the target charging rate is determined from the charging capacity mapping table of the power battery based on the current state of charge parameters and battery temperature, and the current target charging current of the power battery is calculated based on the target charging rate and the rated capacity of the power battery.

[0114] Step 402: Determine the current target charging current based on the maximum charging current and the current output current of the target charging device.

[0115] The maximum charging current is the highest current that the power battery can currently withstand. The target charging current is the maximum charging current that the power battery can receive.

[0116] Optionally, if the maximum charging current is greater than or equal to the current output current of the target charging device, it indicates that the current that the power battery can withstand is higher than the current that the target charging device can output. In this case, the maximum charging current is determined to be the current target charging current. Since the highest current that the battery can currently withstand is less than the maximum charging current, the current output current of the charging device can be fully received by the power battery.

[0117] In this embodiment, based on the current state of charge and battery temperature, the maximum charging current at the current state of charge and battery temperature is determined using a power battery charging capacity mapping table. If the maximum charging current is greater than or equal to the current output current of the target charging device, then the maximum charging current is determined as the current target charging current. This application can improve the charging efficiency of the power battery and control the power battery to operate at a higher efficiency current.

[0118] Based on the above embodiments, this application also provides a process for determining the target charging current in another battery charging thermal management control method. Figure 5 This is a flowchart illustrating the determination of the target charging current in another battery charging thermal management control method provided in this application embodiment, as shown below. Figure 5 As shown, in step 402 above, the current target charging current is determined based on the maximum charging current and the current output current of the target charging device, including:

[0119] Step 501: If the maximum charging current is less than the current output current of the target charging device, then the charging current at adjacent temperatures of the current state of charge is determined using the charging capacity mapping table of the power battery based on the current state of charge and battery temperature.

[0120] Optionally, if the maximum charging current is less than the current output current of the target charging device, it indicates that the output current of the charging device cannot be fully received by the target vehicle's power battery. In this case, based on the current state of charge parameters and battery temperature, the target charging rate is determined from the power battery's charging capacity mapping table. The charging current at adjacent temperatures is then calculated based on the target charging rate and the power battery's rated capacity. Specifically, when the battery temperature is below the preset optimal operating temperature range, the adjacent temperature is higher than the battery temperature. Conversely, when the battery temperature is above the preset optimal operating temperature range, the adjacent temperature is lower than the battery temperature.

[0121] Step 502: If the charging current at an adjacent temperature is greater than the maximum charging current, then the charging current at the adjacent temperature is determined as the current target charging current.

[0122] Optionally, if the charging current at an adjacent temperature is greater than the maximum charging current, it indicates that the power battery has a stronger ability to receive the output current of the charging device at the adjacent temperature, and the charging current at the adjacent temperature is determined as the current target charging current.

[0123] In this embodiment, if the maximum charging current is less than the current output current of the target charging device, the charging current at a temperature adjacent to the current state of charge and battery temperature is determined based on the current state of charge and battery temperature. If the charging current at the adjacent temperature is greater than the maximum charging current, the charging current at the adjacent temperature is determined as the current target charging current. This application can effectively determine the charging current, thereby reducing charging losses without heating the power battery to a higher temperature, but improving charging efficiency.

[0124] Based on the above embodiments, this application also provides a process for determining the battery operating temperature range in a battery charging thermal management control method. Figure 6 This is a flowchart illustrating the process of determining the battery operating temperature range in a battery charging thermal management control method provided in an embodiment of this application. Figure 6 As shown, in step 104 above, during the charging process of the power battery, a target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature is within the corresponding battery operating temperature range, including:

[0125] Step 601: If the target charging thermal management mode is the low-temperature charging thermal management mode, then during the charging process of the power battery, the heating equipment in the thermal management system is controlled to heat the power battery so that the battery temperature is in the first temperature range.

[0126] The first temperature range is 10 to 20 degrees Celsius. This first temperature range is smaller than the preset optimal operating temperature range.

[0127] Optionally, if the target charging thermal management mode is a low-temperature charging thermal management mode, it means that it may be winter. If the power battery is directly heated to the preset optimal operating temperature range, the energy consumption during the charging process will be too high. It is only necessary to control the heating equipment in the thermal management system to heat the power battery so that the battery temperature is in the first temperature range, which can significantly improve the charging efficiency of the battery and reduce the charging energy consumption.

[0128] Step 602: If the target charging thermal management mode is the high-temperature charging thermal management mode, during the charging process of the power battery, the condensation equipment in the thermal management system is controlled to cool the power battery so that the battery temperature is in the second temperature range.

[0129] The second temperature range is 30 to 45 degrees Celsius. This second temperature range is greater than the preset optimal operating temperature range.

[0130] Optionally, if the target charging thermal management mode is the high-temperature charging thermal management mode, it means that it may be summer. If the power battery is directly cooled to the preset optimal operating temperature range, the energy consumption during the charging process will be too high. It is only necessary to control the condensation equipment in the thermal management system to cool the power battery so that the battery temperature is in the second temperature range, which can significantly improve the charging efficiency of the battery and reduce the charging energy consumption.

[0131] In the embodiments of this application, the target battery is heated or cooled according to the target charging thermal management mode, so that the temperature of the power battery is within a first temperature range or a second temperature range. This application eliminates the need to heat the power battery to a preset optimal operating temperature range; it only heats the power battery according to the thermal management mode, which can reduce energy loss during the charging process and thus better match the output capacity of the charging equipment.

[0132] Based on the above embodiments, this application also provides a process for generating a target charging thermal management mode in a battery charging thermal management control method. Figure 7 This is a flowchart illustrating the generation of a target charging thermal management mode in a battery charging thermal management control method provided in an embodiment of this application. Figure 7 As shown, before determining the target charging thermal management mode from multiple preset charging thermal management modes based on the battery temperature and the current ambient temperature in step 102 above, the method further includes:

[0133] Step 701: Obtain the charging thermal management strategy configuration information for the target vehicle transmitted by the terminal device.

[0134] The terminal device can be an in-vehicle terminal, a vehicle central control unit, or a mobile terminal, any device capable of configuring the charging thermal management strategy for the target vehicle.

[0135] Optionally, the charging thermal management strategy on the target vehicle can be configured through the terminal device. Specifically, after responding to the start charging signal of the target vehicle, the user can configure the charging thermal management strategy of the target vehicle on the terminal device, for example, by setting the corresponding charging temperature.

[0136] Step 702: Generate the target charging thermal management mode based on the charging thermal management strategy configuration information.

[0137] Optionally, after receiving the charging thermal management strategy configuration information sent by the terminal device, the battery management system in the target vehicle generates a target charging thermal management mode based on the charging thermal management strategy configuration information. For example, the target charging thermal management mode is generated based on the corresponding charging temperature.

[0138] Optionally, during the charging process of the power battery, a target charging thermal management mode is adopted. This mode controls the thermal management system of the target vehicle to control the temperature of the power battery, ensuring that the battery temperature is within the corresponding operating temperature range. The target charging thermal management mode is then sent to the terminal device. The terminal device receives feedback on the target charging thermal management mode and determines whether it is appropriate to perform charging thermal management on the power battery according to this mode. If the terminal device determines to perform thermal management on the power battery according to the target charging thermal management mode, it adopts this mode and controls the thermal management system of the target vehicle to control the battery temperature, ensuring that the battery temperature is within the corresponding operating temperature range. If the terminal device does not approve of performing thermal management on the power battery according to the target charging thermal management mode, it determines the basic charging thermal management mode as the target charging thermal management mode and adopts it to control the thermal management system of the target vehicle to control the battery temperature, ensuring that the battery temperature is within the corresponding operating temperature range.

[0139] In this embodiment, the charging thermal management strategy configuration information for the target vehicle transmitted by the terminal device is obtained; a target charging thermal management mode is generated based on the charging thermal management strategy configuration information. This application generates a target charging thermal management mode based on the charging thermal management strategy configuration information of the terminal device, and the mode can be adjusted according to user needs to meet personalized user requirements and improve user satisfaction.

[0140] Based on the same inventive concept, this application also provides a battery charging thermal management control device corresponding to the battery charging thermal management control method. Since the principle of the device in this application is similar to the battery charging thermal management control method described above, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0141] Figure 8 This is a schematic diagram of a battery charging thermal management control device provided in an embodiment of this application. The device includes:

[0142] The response module 801 is used to respond to the start charging signal of the target vehicle and obtain the battery temperature, current state of charge parameters and current ambient temperature of the power battery on the target vehicle.

[0143] The determination module 802 is used to determine the target charging thermal management mode from a number of preset charging thermal management modes based on the battery temperature and the current ambient temperature; different charging thermal management modes have different battery operating temperature ranges.

[0144] The determination module 802 is used to determine the current target charging current of the power battery based on the operating temperature range of the battery temperature, the current state of charge parameter and the target charging thermal management mode, and send the current target charging current to the target charging device so that the target charging device uses the current target charging current to charge the power battery.

[0145] The control module 803 is used to control the thermal management system of the target vehicle to control the temperature of the power battery during the charging process of the power battery by adopting the target charging thermal management mode, so that the battery temperature of the power battery is within the corresponding battery operating temperature range.

[0146] Optionally, the multiple preset charging thermal management modes include: a basic charging thermal management mode and at least one customized charging thermal management mode; each customized charging thermal management mode is a charging thermal management mode for a target vehicle that is preset by the user through the terminal device; the determining module 802 is specifically used to: determine whether the activation trigger conditions of each customized charging thermal management mode are met based on the battery temperature and the current ambient temperature.

[0147] If the activation trigger conditions for all customized charging thermal management modes are not met, the basic charging thermal management mode is determined as the target charging thermal management mode.

[0148] If the activation trigger condition of any custom charging thermal management mode is met, then any custom charging thermal management mode is determined as the target charging thermal management mode.

[0149] Optionally, at least one customized charging thermal management mode includes: a low-temperature charging thermal management mode and a high-temperature charging thermal management mode; the determining module 802 is specifically used to: if the current ambient temperature is less than or equal to a preset low-temperature ambient threshold and the battery temperature is less than or equal to a first battery temperature threshold, then determine that the activation trigger condition of the low-temperature charging thermal management mode is met.

[0150] If the current ambient temperature is greater than or equal to the preset high-temperature environment threshold, and the battery temperature is greater than or equal to the second battery temperature threshold, then the activation trigger condition for the high-temperature charging thermal management mode is determined to be met.

[0151] Optionally, the determining module 802 is specifically used to: if the target charging thermal management mode is the basic charging thermal management mode, then determine the current target charging current based on the current state of charge and battery temperature using the charging capacity mapping table of the power battery;

[0152] During the charging process of the power battery, a target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature is within the corresponding battery operating temperature range, including:

[0153] During the charging process of the power battery, a basic charging thermal management mode is adopted to control the temperature of the power battery through the thermal management system until the battery temperature enters the preset optimal operating temperature range.

[0154] Optionally, the determining module 802 is specifically used to: if the target charging thermal management mode is a low temperature charging thermal management mode or a high temperature charging thermal management mode, and the operating temperature range is a first temperature range lower than the preset optimal operating temperature range, then the maximum charging current of the battery temperature under the current state of charge is determined by using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature.

[0155] The current target charging current is determined based on the maximum charging current and the current output current of the target charging device.

[0156] Optionally, the determining module 802 is specifically used to: if the maximum charging current is greater than or equal to the current output current of the target charging device, then determine the maximum charging current as the current target charging current.

[0157] Optionally, the determining module 802 is specifically used to: if the maximum charging current is less than the current output current of the target charging device, then determine the charging current at adjacent temperatures of the current state of charge based on the current state of charge and battery temperature using the charging capacity mapping table of the power battery.

[0158] If the charging current at an adjacent temperature is greater than the maximum charging current, then the charging current at the adjacent temperature is determined as the current target charging current.

[0159] Optionally, the determining module 802 is specifically used to: if the target charging thermal management mode is a low temperature charging thermal management mode, then during the charging process of the power battery, control the heating equipment in the thermal management system to heat the power battery so that the battery temperature of the power battery is in the first temperature range.

[0160] If the target charging thermal management mode is the high-temperature charging thermal management mode, during the charging process of the power battery, the condensation equipment in the thermal management system is controlled to cool the power battery, so that the battery temperature is in the second temperature range.

[0161] Optionally, the determining module 802 is further configured to: obtain the charging thermal management strategy configuration information for the target vehicle transmitted by the terminal device;

[0162] Based on the charging thermal management strategy configuration information, generate the target charging thermal management mode.

[0163] The processing flow of each module in the device and the interaction flow between each module can be referred to the relevant descriptions in the above method embodiments, and will not be detailed here.

[0164] This application also provides a new energy vehicle. Figure 9 This is a schematic diagram of the structure of a new energy vehicle provided in an embodiment of this application. The new energy vehicle includes: a vehicle body 100, a power battery 200 disposed on the vehicle body, a battery management system 300, a thermal management system 400, and an ambient temperature sensor 500; wherein, the power battery 200 and the battery management system 300 are connected, and the battery management system 300, the ambient temperature sensor 500, and the thermal management system 400 are all connected to a preset vehicle bus. The battery management system 300 is used to execute the steps of any of the above-mentioned battery charging thermal management control methods.

[0165] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of any of the above-described battery charging thermal management control methods.

[0166] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, 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 displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0167] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0168] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A battery charging thermal management control method, characterized by, The method, which applies a battery management system to a target vehicle, includes: In response to the start charging signal of the target vehicle, the battery temperature, current state of charge parameters, and current ambient temperature of the power battery on the target vehicle are obtained. Based on the battery temperature and the current ambient temperature, a target charging thermal management mode is determined from a set of preset charging thermal management modes; different charging thermal management modes have different battery operating temperature ranges. Based on the operating temperature range of the battery, the current state of charge parameters, and the target charging thermal management mode, the current target charging current of the power battery is determined, and the current target charging current is sent to the target charging device so that the target charging device uses the current target charging current to charge the power battery. During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery so that the battery temperature is within the corresponding battery operating temperature range. The preset multiple charging thermal management modes include: a basic charging thermal management mode and at least one customized charging thermal management mode; each customized charging thermal management mode is a charging thermal management mode for the target vehicle that is preset by the user through the terminal device. The step of determining a target charging thermal management mode from a set of preset charging thermal management modes based on the battery temperature and the current ambient temperature includes: Based on the battery temperature and the current ambient temperature, determine whether the activation trigger conditions for each customized charging thermal management mode are met. If the activation trigger conditions for all customized charging thermal management modes are not met, then the basic charging thermal management mode is determined to be the target charging thermal management mode. If the activation trigger condition of any customized charging thermal management mode is met, then the customized charging thermal management mode is determined to be the target charging thermal management mode. The at least one customized charging thermal management mode includes: a low-temperature charging thermal management mode and a high-temperature charging thermal management mode; The step of determining the current target charging current of the power battery based on the operating temperature range of the battery, the current state of charge parameters, and the target charging thermal management mode includes: If the target charging thermal management mode is the basic charging thermal management mode, then the current target charging current is determined by using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature. During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature of the power battery is within the corresponding battery operating temperature range, including: During the charging process of the power battery, the basic charging thermal management mode is adopted to control the thermal management system to control the temperature of the power battery until the battery temperature of the power battery enters the preset optimal operating temperature range. Determining the current target charging current of the power battery based on the operating temperature range of the battery, the current state of charge, and the target charging thermal management mode includes: If the target charging thermal management mode is a low-temperature charging thermal management mode or a high-temperature charging thermal management mode, and the operating temperature range is a first temperature range lower than the preset optimal operating temperature range, then the maximum charging current of the battery temperature under the current charging state is determined by using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature. The current target charging current is determined based on the maximum charging current and the current output current of the target charging device.

2. The method according to claim 1, characterized in that, The step of determining whether the activation trigger conditions for each customized charging thermal management mode are met based on the battery temperature and the current ambient temperature includes: If the current ambient temperature is less than or equal to a preset low-temperature environment threshold, and the battery temperature is less than or equal to a first battery temperature threshold, then the activation trigger condition of the low-temperature charging thermal management mode is determined to be met. If the current ambient temperature is greater than or equal to a preset high-temperature environment threshold, and the battery temperature is greater than or equal to a second battery temperature threshold, then the activation trigger condition for the high-temperature charging thermal management mode is determined to be met.

3. The method of claim 1, wherein, Determining the current target charging current based on the maximum charging current and the current output current of the target charging device includes: If the maximum charging current is greater than or equal to the current output current of the target charging device, then the maximum charging current is determined to be the current target charging current.

4. The method of claim 1, wherein, Determining the current target charging current based on the maximum charging current and the current output current of the target charging device includes: If the maximum charging current is less than the current output current of the target charging device, then the charging current at a temperature adjacent to the battery temperature is determined using the charging capacity mapping table of the power battery based on the current state of charge and the battery temperature. If the charging current at the adjacent temperature is greater than the maximum charging current, then the charging current at the adjacent temperature is determined to be the current target charging current.

5. The method of claim 1, wherein, During the charging process of the power battery, the target charging thermal management mode is adopted to control the thermal management system of the target vehicle to control the temperature of the power battery, so that the battery temperature of the power battery is within the corresponding battery operating temperature range, including: If the target charging thermal management mode is a low-temperature charging thermal management mode, then during the charging process of the power battery, the heating device in the thermal management system is controlled to heat the power battery so that the battery temperature of the power battery is within the first temperature range. If the target charging thermal management mode is a high-temperature charging thermal management mode, during the charging process of the power battery, the condensation device in the thermal management system is controlled to cool the power battery so that the battery temperature is in the second temperature range.

6. The method of claim 1, wherein, Before determining the target charging thermal management mode from a plurality of preset charging thermal management modes based on the battery temperature and the current ambient temperature, the method further includes: Obtain the charging thermal management strategy configuration information for the target vehicle transmitted by the terminal device; Based on the charging thermal management strategy configuration information, a target charging thermal management mode is generated.

7. A new energy vehicle, characterized in that, The new energy vehicle includes: a vehicle body, a power battery installed on the vehicle body, a battery management system, a thermal management system, and an ambient temperature sensor; The power battery and the battery management system are connected, and the battery management system, the ambient temperature sensor and the thermal management system are all connected to a preset vehicle bus. The battery management system is used to execute the steps of the battery charging thermal management control method according to any one of claims 1-6.

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