Vehicle power battery temperature control method and system, vehicle and equipment

Abstract

The application discloses a power battery temperature control method and system of a vehicle, the vehicle and equipment. The power battery temperature control method of the vehicle comprises the following steps: obtaining driving planning data of a navigation path; extracting a slope parameter, determining the grade of the slope according to the slope parameter; obtaining a temperature control strategy according to the grade of the slope, the driving-in time of the vehicle to the slope and the driving time on the slope, wherein the temperature control strategy comprises temperature control demand and a starting time, and the starting time is prior to the driving-in time; and when the starting time is reached, executing the temperature control strategy to pre-cool or pre-heat the power battery before the vehicle drives into the slope. By using the application, the stability and suitability of the power battery temperature of the vehicle under uphill and downhill working conditions can be ensured, the problems of power limitation and reduced charging and discharging efficiency caused by temperature mutation are avoided, the energy consumption of the thermal management system is reduced, the vehicle endurance and the service life of the battery are improved, and the safety and efficiency of the vehicle driving on the slope are ensured.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method, system, vehicle, and equipment for controlling the temperature of a vehicle's power battery. Background Technology

[0002] Vehicle battery thermal management includes passive and active thermal management strategies. Passive thermal management strategies, for example, address the basic temperature requirements of normal driving conditions in real time, adjusting accordingly to actual road conditions. For instance, if the vehicle is driving uphill and the battery temperature is detected to have increased or decreased due to changes in charging / discharging power, cooling or heating components are activated for temperature correction, without pre-temperature control before entering the slope. Active thermal management strategies, for example, involve triggering pre-cooling or pre-heating via user terminal or remote terminal commands to adjust the battery temperature to a preset suitable range in advance. The following technical issues exist: Sudden changes in battery temperature under hilly conditions cannot be anticipated, leading to power limitations or energy consumption: When commercial vehicles climb long hills under heavy loads, the motor operates at peak power, and the high-current discharge of the power battery causes it to heat up rapidly. When descending long hills, energy recovery causes the battery to heat up during fast charging. Existing real-time feedback adjustment methods have temperature control lag, which can easily cause the battery temperature to exceed the suitable range, resulting in power limitations. When driving on hills in low-temperature environments, if the battery is not preheated, the charging and discharging efficiency will be greatly reduced, further exacerbating the range reduction. A single, fixed precooling and preheating strategy is out of touch with actual road conditions: Existing active precooling and preheating technologies are only triggered by user commands and do not take into account the actual road conditions of commercial vehicles (such as the slope, length, and altitude of the road) for personalized temperature control. This can easily lead to over- or under-temperature control, resulting in wasted energy in the thermal management system and a significant reduction in range. Poor temperature control, such as insufficient precooling before long steep slopes, can still cause high-temperature torque limitation issues in the battery and other power systems. Summary of the Invention

[0003] Therefore, it is necessary to provide a method, system, vehicle, and equipment for controlling the temperature of a vehicle's power battery to address the aforementioned technical problems. This can ensure the stability and suitability of the power battery temperature under incline and descent conditions, avoid power limitations and reduced charging and discharging efficiency caused by sudden temperature changes, reduce the energy consumption of the thermal management system, improve the vehicle's range and battery life, and ensure the safety and efficiency of the vehicle when driving on slopes.

[0004] Firstly, a method for controlling the temperature of a vehicle's power battery is provided, comprising: Obtain driving planning data for the navigation route; The slope parameters are extracted from the driving plan data, and the slope grade is determined based on the slope parameters; A temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and activation time, wherein the activation time precedes the entry time. When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

[0005] In some examples, determining the grade of the slope based on the slope parameters includes: The slope and length of the slope are obtained based on the slope parameters; The grade of the slope is determined based on its gradient and length.

[0006] In some examples, the temperature control strategy derived based on the grade of the slope, the vehicle's entry time onto the slope, and the travel time on the slope includes: The required temperature and execution time are determined based on the grade of the slope. The start time is determined based on the entry time; Based on the startup time, the required temperature, and the execution duration, a corresponding control strategy is matched from the pre-temperature control strategy library.

[0007] In some examples, the temperature control strategy includes at least a temperature control strategy for uphill discharge conditions on a long, steep slope and a temperature control strategy for downhill charging conditions on a long, steep slope, wherein: The temperature control strategy under the long steep slope discharge condition is to start high-intensity precooling when the temperature of the power battery is greater than the first temperature threshold, and to start rapid preheating when the temperature of the power battery is less than the second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold. The temperature control strategy under the long steep slope downhill recycling charging condition is as follows: when the temperature of the power battery is greater than the third temperature threshold, medium-intensity precooling is initiated; when the temperature of the power battery is less than the fourth temperature threshold, basic battery preheating is maintained. The third temperature threshold is greater than the fourth temperature threshold.

[0008] In some examples, before deriving the temperature control strategy based on the grade of the slope, the vehicle's entry time onto the slope, and the travel time on the slope, the following steps are included: Obtain the vehicle's driving status, wherein the driving status includes vehicle speed; The time it takes for the vehicle to enter the slope and the time it takes to travel on the slope are obtained based on the vehicle's driving status.

[0009] In some examples, the execution of the temperature control strategy also includes: Obtain the battery state of the power battery; The temperature control parameters of the temperature control strategy are adjusted in real time based on the battery status of the power battery.

[0010] In some examples, it also includes: If the battery status of the power battery is abnormal, or if the temperature control strategy is executed abnormally, a warning will be triggered. If the temperature control strategy is being executed, the execution of the temperature control strategy will be terminated and the system will switch to the default mode.

[0011] Secondly, a vehicle power battery temperature control system is provided, comprising: The acquisition module is used to obtain driving planning data for the navigation route; The determination module is used to extract slope parameters from the driving plan data and determine the slope level based on the slope parameters; A matching module is used to obtain a temperature control strategy based on the grade of the slope, the entry time of the vehicle to the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and a start time, wherein the start time precedes the entry time. The control module is used to execute the temperature control strategy when the start-up time is reached, so as to pre-cool or preheat the power battery before the vehicle enters the slope.

[0012] Thirdly, a vehicle is provided, including: a power battery temperature control system for the vehicle according to the second aspect described above.

[0013] Fourthly, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the power battery temperature control method for a vehicle according to the first aspect and any possible implementation of the first aspect.

[0014] Fifthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the vehicle power battery temperature control method described in the first aspect and any possible implementation thereof.

[0015] In a sixth aspect, a computer program product is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the vehicle power battery temperature control method described in the first aspect and any possible implementation thereof.

[0016] The embodiments of this application achieve forward-looking, predictive, precise, and low-energy-consumption pre-cooling and pre-heating control of vehicle power batteries under slope conditions, such as those in commercial vehicles. Under complex slope conditions such as heavy-load climbing and descending long slopes, the power battery temperature remains stable within a suitable range, avoiding power limitations and reduced charging and discharging efficiency caused by sudden temperature changes. Simultaneously, it reduces the energy consumption of the thermal management system, improves the vehicle's range and battery lifespan, and ensures the safety and efficiency of commercial vehicles driving on slopes. By extracting slope parameters in advance and calculating the entry time, sufficient execution windows are reserved for pre-cooling and pre-heating, ensuring that the battery temperature accurately reaches the target range when the vehicle enters the slope. The pre-temperature control advance can be flexibly adjusted according to driving speed to adapt to different driving conditions of commercial vehicles. Differentiated temperature control strategies are matched for slopes of different gradients and lengths, making temperature control operations more targeted. For example, high-intensity pre-cooling on long, steep slopes can reduce the battery temperature rise rate and avoid high-temperature torque limitation; pre-heating in low-temperature environments can improve battery charging and discharging efficiency. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A flowchart of a vehicle power battery temperature control method provided in an embodiment of this application; Figure 2 A schematic diagram illustrating the implementation of the vehicle power battery temperature control method provided in this application embodiment; Figure 3 A structural block diagram of the vehicle power battery temperature control system provided in the embodiments of this application; Figure 4 This is a structural block diagram of a computer device provided in an embodiment of this application. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features of the embodiments in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] The following describes in detail, with reference to the accompanying drawings, a method, system, vehicle, and device for controlling the temperature of a vehicle's power battery according to embodiments of this application.

[0021] Figure 1 This is a flowchart of a vehicle power battery temperature control method according to an embodiment of this application. Figure 1 As shown, the vehicle power battery temperature control method according to an embodiment of this application includes the following steps: S101: Obtain driving planning data for the navigation route.

[0022] like Figure 2 As shown, the navigation route planning module can be used to obtain the driving planning data of the navigation route. That is, the navigation route planning module provides navigation data parameters of the planned route in real time. For example, it provides driving planning data in the route navigation, where the planned route has slope-related parameters, including the starting position of the slope section, slope length, altitude change and other related parameters.

[0023] The navigation path planning module can be integrated into the cockpit controller.

[0024] S102: Extract the slope parameters from the driving plan data, and determine the slope level based on the slope parameters.

[0025] In one embodiment of this application, determining the grade of the slope based on the slope parameters includes: obtaining the slope and length of the slope based on the slope parameters; and determining the grade of the slope based on the slope and length.

[0026] Combination Figure 2 As shown, this can be achieved through a navigation slope prediction module, which can also be integrated into the cockpit controller. This module receives driving planning data sent by the navigation path planning module, extracts slope-related parameters from the planned path in real time, and classifies the extracted slope parameters. Table 1 shows an example of the slope classification results. The actual slope conditions are a combination of the following three states. Table 1

[0027] S103: Based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope, a temperature control strategy is obtained, wherein the temperature control strategy includes temperature control requirements and a start time, wherein the start time precedes the entry time.

[0028] It should be noted that before obtaining the temperature control strategy based on the grade of the slope, the vehicle's entry time on the slope, and the travel time on the slope, the method further includes: obtaining the vehicle's driving status, wherein the driving status includes the vehicle speed; and obtaining the vehicle's entry time on the slope and the travel time on the slope based on the vehicle's driving status.

[0029] In one embodiment of this application, a temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The strategy includes: determining the required temperature and execution duration based on the grade of the slope; determining the start time based on the entry time; and matching a corresponding control strategy from a pre-controlled temperature strategy library based on the start time, the required temperature, and the execution duration.

[0030] In a specific example, the temperature control strategy includes at least a temperature control strategy for uphill discharge on a long, steep slope and a temperature control strategy for downhill charging on a long, steep slope, wherein: the temperature control strategy for uphill discharge on a long, steep slope involves initiating high-intensity precooling when the battery temperature is greater than a first temperature threshold (e.g., 30°C) and initiating rapid preheating when the battery temperature is less than a second temperature threshold (e.g., 10°C), wherein the first temperature threshold is greater than the second temperature threshold; the temperature control strategy for downhill charging on a long, steep slope involves initiating medium-intensity precooling when the battery temperature is greater than a third temperature threshold (e.g., 30°C) and maintaining basic battery preheating when the battery temperature is less than a fourth temperature threshold (e.g., 10°C), wherein the third temperature threshold is greater than the fourth temperature threshold.

[0031] Specifically, combined Figure 2 As shown, based on the vehicle's current speed, the remaining time before entering the slope and the total driving time are calculated, and this information is sent to the pre-cooling and pre-heating execution module. The pre-cooling and pre-heating execution module has a built-in power battery slope pre-temperature control strategy library. This library, based on the slope condition level, the difference between the current battery temperature and the preset suitable temperature, and using the remaining time before entering the slope and the total driving time, matches and executes the corresponding pre-temperature control strategy (pre-cooling and pre-heating requirements, target temperature) and sets the pre-cooling and pre-heating execution time to ensure that the battery temperature accurately reaches the target suitable range when the vehicle enters the slope.

[0032] Once the battery temperature is maintained within a suitable and safe operating range, the pre-cooling and preheating process is stopped, and the normal thermal management mode is restored.

[0033] The basic strategies for precooling and preheating in slope conditions are shown in Table 2, and the rules are as follows: Table 2

[0034] S104: When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

[0035] The process of executing the temperature control strategy also includes: obtaining the battery status of the power battery; and adjusting the temperature control parameters of the temperature control strategy in real time based on the battery status of the power battery.

[0036] Furthermore, if the battery status of the power battery is abnormal, or if the temperature control strategy malfunctions, a warning is triggered. If the temperature control strategy is currently in operation, its execution is terminated and the system switches to the default mode. Thus, the driving process can be corrected in real time based on feedback. Even if the actual slope length exceeds the predicted value, the temperature control strategy can be adjusted promptly to prevent temperature runaway.

[0037] Combination Figure 2 As shown, this can be achieved through a battery status detection module. For example, the battery status detection module synchronously collects the current status parameters of the power battery and sends them to the pre-cooling and preheating execution module for real-time correction of the pre-cooling and preheating execution. The current status parameters of the power battery include the real-time temperature of the battery pack, SOC (state of charge), charging and discharging power, and other operating statuses. After confirming that there are no faults, the battery status parameters are transmitted to the pre-cooling and preheating execution module. If a fault is detected in the temperature control component, an alarm is immediately triggered, and the purpose is to terminate the pre-temperature control process and switch to the normal thermal management mode.

[0038] The embodiments of this application deeply integrate navigation slope prediction with power battery pre-cooling and pre-heating: Proactive navigation slope prediction and slope temperature control solve the problem of temperature control lag. This application extracts slope parameters in advance through navigation, completing pre-cooling and pre-heating before the vehicle enters the slope, transforming passive temperature control into active proactive temperature control, avoiding sudden changes in battery temperature under slope conditions. Graded adaptation to road conditions solves the problem of insufficient temperature control accuracy. Slopes are graded based on slope, slope length, and operating condition type, matching personalized pre-temperature control strategies to adapt to the complex operating conditions of vehicles such as commercial vehicles on heavy-duty slopes. For example, high-intensity pre-cooling is designed for long, steep uphill climbs, solving the problem of high-temperature torque limitation of the battery when climbing long slopes. This effectively avoids high temperatures during uphill discharge and high temperatures during downhill fast charging recovery, preventing battery power limitation, improving the driving efficiency of commercial vehicles on heavy-duty slopes, and reducing parking accidents and energy waste caused by power battery temperature issues. This ensures that the battery always operates within a suitable temperature range under slope conditions, reducing the impact of high and low temperatures on battery life and avoiding the risk of thermal runaway of the power battery caused by sudden temperature changes.

[0039] The vehicle power battery temperature control method according to the embodiments of this application realizes forward-looking predictive, precise, and low-energy-consumption pre-cooling and pre-heating control of the power battery in vehicles such as commercial vehicles under slope conditions. Under complex slope conditions such as heavy-load climbing and long descents, the power battery temperature remains stable within a suitable range, avoiding power limitations and reduced charging and discharging efficiency caused by sudden temperature changes. Simultaneously, it reduces the energy consumption of the thermal management system, improves the vehicle's range and battery lifespan, and ensures the safety and efficiency of commercial vehicles driving on slopes. By extracting slope parameters in advance and calculating the entry time, sufficient execution windows are reserved for pre-cooling and pre-heating, ensuring that the battery temperature accurately reaches the target range when the vehicle enters the slope. The pre-temperature control advance can be flexibly adjusted according to the driving speed to adapt to different driving conditions of commercial vehicles. Differentiated temperature control strategies are matched for slopes of different gradients and lengths, making temperature control operations more targeted. For example, high-intensity pre-cooling on long, steep uphill slopes can reduce the battery temperature rise rate and avoid high-temperature torque limitation; pre-heating in low-temperature environments can improve battery charging and discharging efficiency.

[0040] Figure 3 This is a structural block diagram of a vehicle power battery temperature control system according to an embodiment of this application. Figure 3 As shown, a vehicle power battery temperature control system according to an embodiment of this application includes: an acquisition module 310, a determination module 320, a matching module 330, and a control module 340, wherein: The acquisition module 310 is used to obtain driving planning data for the navigation path; The determination module 320 is used to extract slope parameters from the driving plan data and determine the slope level based on the slope parameters; The matching module 330 is used to obtain a temperature control strategy based on the grade of the slope, the entry time of the vehicle to the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and a start time, wherein the start time precedes the entry time. The control module 340 is used to execute the temperature control strategy when the start-up time is reached, so as to pre-cool or preheat the power battery before the vehicle enters the slope.

[0041] The vehicle power battery temperature control system according to the embodiments of this application realizes forward-looking predictive, precise, and low-energy-consumption pre-cooling and pre-heating control of the power battery in vehicles such as commercial vehicles under slope conditions. Under complex slope conditions such as heavy-load climbing and long descents, the power battery temperature remains stable within a suitable range, avoiding power limitations and reduced charging and discharging efficiency caused by sudden temperature changes. Simultaneously, it reduces the energy consumption of the thermal management system, improves the vehicle's range and battery lifespan, and ensures the safety and efficiency of commercial vehicles driving on slopes. By extracting slope parameters in advance and calculating the entry time, sufficient execution windows are reserved for pre-cooling and pre-heating, ensuring that the battery temperature accurately reaches the target range when the vehicle enters the slope. The pre-temperature control advance can be flexibly adjusted according to the driving speed to adapt to different driving conditions of commercial vehicles. Differentiated temperature control strategies are matched for slopes of different gradients and lengths, making temperature control operations more targeted. For example, high-intensity pre-cooling on long, steep uphill slopes can reduce the battery temperature rise rate and avoid high-temperature torque limitation; pre-heating in low-temperature environments can improve battery charging and discharging efficiency.

[0042] Specific limitations regarding the vehicle's power battery temperature control system can be found in the above description of the power battery temperature control method, and will not be repeated here. The various modules of the aforementioned vehicle power battery temperature control system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the computer device's memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0043] Furthermore, a vehicle is provided, including a power battery temperature control system according to any of the above embodiments. This vehicle achieves forward-looking, precise, and low-energy-consumption pre-cooling and pre-heating control of the power battery under slope conditions. Under complex slope conditions such as heavy-load climbing and descending, the power battery temperature remains stable within a suitable range, avoiding power limitations and reduced charging and discharging efficiency caused by sudden temperature changes. Simultaneously, it reduces the energy consumption of the thermal management system, improves the vehicle's range and battery lifespan, and ensures the safety and efficiency of commercial vehicles driving on slopes. By extracting slope parameters in advance and calculating the entry time, sufficient execution windows are reserved for pre-cooling and pre-heating, ensuring that the battery temperature accurately reaches the target range when the vehicle enters the slope. The pre-temperature control advance can be flexibly adjusted according to the driving speed to adapt to different driving conditions of commercial vehicles. Differentiated temperature control strategies are matched for slopes of different gradients and lengths, making temperature control operations more targeted. For example, high-intensity pre-cooling on long, steep slopes can reduce the battery temperature rise rate and avoid high-temperature torque limitation; pre-heating in low-temperature environments can improve battery charging and discharging efficiency.

[0044] Furthermore, other components and functions of the vehicle according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0045] In one embodiment, a computer device is provided. Figure 4 This is a structural block diagram of the computer device provided in the embodiments of this application, with reference to... Figure 4 The computer device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned embodiment of the vehicle's power battery temperature control method. For example, it executes: obtaining driving planning data for the navigation route; The slope parameters are extracted from the driving plan data, and the slope grade is determined based on the slope parameters; A temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and activation time, wherein the activation time precedes the entry time. When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

[0046] This application also provides a computer-readable storage medium storing a computer program. When the processor executes the computer program, it implements the aforementioned embodiment of the vehicle's power battery temperature control method. For example, it executes: obtaining driving planning data for the navigation path; The slope parameters are extracted from the driving plan data, and the slope grade is determined based on the slope parameters; A temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and activation time, wherein the activation time precedes the entry time. When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

[0047] This application provides a computer program product including instructions that, when executed, cause the method described in this application embodiment to be performed. For example, it can execute... Figure 1 The steps of the vehicle's power battery temperature control method shown include, for example, obtaining driving planning data for the navigation path; The slope parameters are extracted from the driving plan data, and the slope grade is determined based on the slope parameters; A temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and activation time, wherein the activation time precedes the entry time. When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

[0048] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for controlling the temperature of a vehicle's power battery, characterized in that, include: Obtain driving planning data for the navigation route; The slope parameters are extracted from the driving plan data, and the slope grade is determined based on the slope parameters; A temperature control strategy is obtained based on the grade of the slope, the entry time of the vehicle onto the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and activation time, wherein the activation time precedes the entry time. When the start-up time is reached, the temperature control strategy is executed to pre-cool or preheat the power battery before the vehicle enters the slope.

2. The method for controlling the temperature of a vehicle's power battery according to claim 1, characterized in that, Determining the grade of the slope based on the slope parameters includes: The slope and length of the slope are obtained based on the slope parameters; The grade of the slope is determined based on its gradient and length.

3. The method for controlling the temperature of a vehicle's power battery according to claim 1, characterized in that, The temperature control strategy, derived based on the grade of the slope, the vehicle's entry time onto the slope, and its travel time on the slope, includes: The required temperature and execution time are determined based on the grade of the slope. The start time is determined based on the entry time; Based on the startup time, the required temperature, and the execution duration, a corresponding control strategy is matched from the pre-temperature control strategy library.

4. The method for controlling the temperature of a vehicle's power battery according to claim 3, characterized in that, The temperature control strategy includes at least a temperature control strategy for discharge conditions on a long, steep slope and a temperature control strategy for recovery and charging conditions on a long, steep slope, wherein: The temperature control strategy under the long steep slope discharge condition is to start high-intensity precooling when the temperature of the power battery is greater than the first temperature threshold, and to start rapid preheating when the temperature of the power battery is less than the second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold. The temperature control strategy under the long steep slope downhill recycling charging condition is as follows: when the temperature of the power battery is greater than the third temperature threshold, medium-intensity precooling is initiated; when the temperature of the power battery is less than the fourth temperature threshold, basic battery preheating is maintained. The third temperature threshold is greater than the fourth temperature threshold.

5. The method for controlling the temperature of a vehicle's power battery according to claim 1, characterized in that, Before deriving the temperature control strategy based on the grade of the slope, the vehicle's entry time onto the slope, and the travel time on the slope, the method further includes: Obtain the vehicle's driving status, wherein the driving status includes vehicle speed; The time it takes for the vehicle to enter the slope and the time it takes to travel on the slope are obtained based on the vehicle's driving status.

6. The method for controlling the temperature of a vehicle's power battery according to any one of claims 1-5, characterized in that, The process of implementing the temperature control strategy also includes: Obtain the battery state of the power battery; The temperature control parameters of the temperature control strategy are adjusted in real time based on the battery status of the power battery.

7. The method for controlling the temperature of a vehicle's power battery according to claim 6, characterized in that, Also includes: If the battery status of the power battery is abnormal, or if the temperature control strategy is executed abnormally, a warning will be triggered. If the temperature control strategy is being executed, the execution of the temperature control strategy will be terminated and the system will switch to the default mode.

8. A power battery temperature control system for a vehicle, characterized in that, include: The acquisition module is used to obtain driving planning data for the navigation route; The determination module is used to extract slope parameters from the driving plan data and determine the slope level based on the slope parameters; A matching module is used to obtain a temperature control strategy based on the grade of the slope, the entry time of the vehicle to the slope, and the travel time on the slope. The temperature control strategy includes temperature control requirements and a start time, wherein the start time precedes the entry time. The control module is used to execute the temperature control strategy when the start-up time is reached, so as to pre-cool or preheat the power battery before the vehicle enters the slope.

9. A vehicle, characterized in that, include: The vehicle power battery temperature control system according to claim 8.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, When the processor executes the computer program, it implements the vehicle power battery temperature control method according to any one of claims 1-7.

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